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تقييم اسلوب التقدير الذاتي في التحاسب الضريبي لكبار المكلفين في دول عربية وامكانية تطبيقها في العراق Evaluation the style of subjective appreciation in the taxes account for the major accounters in Arabic states and the bility of applying them in Iraq

اسم المؤلف: حيدر كاظم نصر الله حسين التميمي
اسم المشرف: نادية طالب سلمان السلطاني
الموضوع العام: الادارة والاقتصاد
السنة: 2011
الموضوع الدقيق: الضرائب
الدرجة: ماجستير
اللغة: العربية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: شريحة كبار دافعي الضرائب ( كبار المكلفين ) من اهم الشرائح داخل المجتمع الضريبي، وذلك لمساهمتهم بنسبة كبيرة في الايرادات الضريبية، ونظرا الى اهمية هذه الشريحة فقد حاول الباحث التركيز في دراسته على تجارب بعض الدول العربية التي سبقت العراق بالاهتمام بهذه الشريحة، ليستفيد منها في حصر الشركات الكبيرة التي يمكن عدها من كبار المكلفين في تنظيم اداري خاص بها، على ان يركز بالدرجة الاساس على تقديم افضل الخدمات لهذه الشركات ويعتمد اسلوب التقدير الذاتي الذي يعد من الاساليب العلمية الحديثة في تقدير الدخل الخاضع للضريبة، ونظرا لعدم الاهتمام بكبار المكلفين في الهيئة العامة للضرائب/ قسم الشركات، ياتي البحث بمشكلة مفادها ان اقدام الهيئة العامة للضرائب على اعتماد اسلوب التقدير الذاتي ينطلق من ايمانها بان الثقة المتبادلة بين اطراف عملية التحاسب الضريبي (الادارة الضريبية، مراقب الحسابات، الشركات المساهمة والمحدودة) هي الاساس في نجاحها في تطبيق هذا الاسلوب الا ان الهيئة العامة للضرائب تستخدم في بعض الاحيان طرائق تقليدية (ضوابط سنوية، تقدير اداري) مع جميع الشركات على الرغم من ان بعض الشركات تساهم بنسبة كبيرة في الحصيلة الضريبية وتمتلك مميزات تعتبر اساسية لنجاح اسلوب التقدير الذاتي والتي تسمى في بعض الدول العربية بكبار المكلفين ، فقد حاول الباحث التركيز على اهمية التفرقة بين الشركات في عملية التحاسب الضريبي والخدمات المقدمة، لان بعض من هذه الشركات تتمتع بمميزات تعد اساسية لنجاح الاساليب العلمية في تقدير الدخل الخاضع للضريبة مثل اسلوب التقدير الذاتي،وعلية فان البحث يركز على جملة من الاهداف اهمها : 1. التعرف على اسلوب التحاسب الضريبي لكبار المكلفين في كل من (مصر،الاردن،سوريا)2. تفعيل العمل باسلوب التقدير الذاتي وتطبيقه على كبار المكلفين في العراق .ولاجل تحقيق تلك الاهداف طرحت الفرضيات الاتية : ان استخدام الهيئة العامة للضرائب اسلوب التقدير الذاتي عند اجراء عملية التحاسب الضريبي مع كبار المكلفين يساهم في : 1. يساهم في زيادة الحصيلة الضريبية .2. يساهم في زيادة الالتزام الطوعي للمكلفينوقد توصل الباحث الى عدد من الاستنتاجات اهمها : ان حصر كبار المكلفين في تنظيم اداري خاص بهم واعتماد اسلوب التقدير الذاتي عند اجراء عملية التحاسب الضريبي مع هذه الشريحة سيساعد في زيادة الحصيلة الضريبية والتزامهم الطوعي .وفي ضوء تلك الاستنتاجات يوصي الباحث بعدد من التوصيات اهمها : تركيز الهيئة العامة للضرائب على تطوير نظام التحاسب الضريبي من خلال الاعتماد على اسلوب التقدير الذاتي بدلا من الاساليب التقليدية ولاسيما مع شريحة كبار المكلفين | The layer of taxes payers (the biggest charges ) is considered as one of the most import element inside the taxes socicaty, for this layer participate in agreat part of taxes incomes .The researcher tries to focus in his study on the experience of some Arab countries which preceded Iraq in taking care of this in order to get use of it in determing the big companies which may be considered as one of the biggest taxes payers of a certain administrative organizing; on the base of focusing mainly on providing them with the best services .The self appreciation method is considered one of the modern scientific methods in estimating the taxes income, scince there is no attention paid by the public corp of taxes \ company section to care of this layer the problem of this search is to traditional methods that the corp of taxes depends in the taxes accountance with all comparies inspite of the noticeable diffrences among them in the mount of taxes or the rate of participation in the total of taxes. The researcher tries to focus on the importance of distinguishing among companies in the taxes accountance process and offered services, for these companies have certain merits which may be considered as the base of scientific methods succession in appreciating the income that subjects to taxes like the self appreciation n method, depending of the above , the research focus on many coals like : 1 - to shed the light on certain bases that can be used in determine the biggest taxes payers and the importance of this layer . 2 - to activate the method of self appreciation after it had been stopped and enhance the trust between the sides of taxes of accountance process .In order to acheave these goals the following hypothesis : were introduced the use of self appreciating method by the public taxes corpe In the taxes accountance process with the biggest payers participates in : 1 - increasing the total of taxes . 2 - increasing the optional commitment of volunteers .There are number of result, the searcher reachs to represented by the following : The public corpe of taxes is late in following the development witnessed in many Arabic countries concernins the ability of developing the taxes management, by determing or specifying the most important group or layer of taxes payers in a acertin administrative organization representing this layer .The recommendations : The necessity of making the public body of taxes focus on the biggest taxes payers layer and working on eliminating difficulties face the requirements of creating a certain administrative organization represent this layer .

التاثير المستقبلي لانضمام العراق الى منظمة التجارة العالمية في ادارة الايرادات الضريبية والكمركية : بحث تطبيقي For Coming Effect of Iraq's Accession To The (WTO) In The Managing Of Tax & Customs Revenues An Application Research

اسم المؤلف: حسام ياسين محسن
اسم المشرف: سعد علي حمود عباس العنزي
الموضوع العام: الادارة والاقتصاد
السنة: 2011
الموضوع الدقيق: الضرائب
الدرجة: ماجستير
اللغة: العربية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: ركزت الدراسة على احد المواضيع المهمة والمعاصرة، في معظم دول العالم ولا سيما الدول النامية وبالذات العراق، الواهو موضوع انضمام العراق الى منظمة التجارة العالمية، والاثار المترتبة على عملية الانضمام، خصوصا ذات الصلة بادارة الايرادات الضريبية والكمركية، فضلا عن ذلك اهم التحديات التي تواجهها عملية الانضمام. فلقد تناول هذا الجانب الفكري للبحث العوامل الرئيسة في الدراسة، وهو، منظمة التجارة العالمية، من حيث مبادئها، واهم مهامها، فضلا عن معطيات النظام الضريبي في العراق ومكوناته الرئيسة، وكذلك مفهوم السياسة الكمركية، واهم ادواتها، وعلاقة قواعد التقييم الكمركي باتفاقيات منظمة التجارة العالمية. وجرى عرض موضوع الدراسة على مجموعة من المختصين (اكاديميين ومهنيين) بورشة عمل تفاعلية، او ما تسمى بمجموعة التركيز(Focus Group)، اذ تم اعتماد دليل لمجموعة التركيز تضمن ثلاثة محاور (استعراض لتجارب دولتي لبنان والاردن - الاثار المالية لعملية الانضمام - التحديات التي ترافق عملية الانضمام). ومن خلال المناقشات التفاعلية، استعمل الباحث التحليل الاقتصادي للاستفادة من المعلومات المستنبطة من مجموعة التركيز. ولقد توصلت الدراسة الى مجموعة من الاستنتاجات من بينها انه تضم اللجنة الوطنية لانضمام العراق الى منظمة التجارة العالمية اعضاء من معظم مؤسسات الدولة، تم اختيار اغلبهم في عضوية اللجنة الوطنية كونهم من الدرجات الخاصة، وليس على اساس كفاءتهم المهنية، وهذا يؤشر محدودية فاعليتهم الفنية في جولات التفاوض، والتهيئة لعملية الانضمام. كما انه رغم توجهات الدولة الى الانفتاح على العالم الخارجي، لا سيما التي تتولى تنظيم الاقتصاد العالمي بجوانبه المختلفة المالية والنقدية والتجارية، مثل صندوق النقد الدولي، والبنك الدولي للانشاء والتعمير، ومنظمة التجارة العالمية، الا ان التشريعات الضريبية لا تنسجم مع هذه التوجهات الجديدة. ومن بين التوصيات التي رات الدراسة اهمها انه من الضروري اعادة النظر بالقوانين الضريبية ولا سيما بقوانين ضرائب الاستهلاك، وبالذات ضريبة المبيعات، لتكون بمثابة تمهيد لضريبة القيمة المضافة، فالعراق بحاجة لمثل تلك الضرائب لمواجهة التغيرات الخارجية، لا سيما المتعلقة بتحرير التجارة، وعملية انضمام العراق الى منظمة التجارة العالمية. | The study focused on one of the important topics that used recently in almost all over the world, especially in developing countries and particularly Iraq, which is Iraq's accession to the WTO, and the impact of this accession on the management of tax revenue and customs, as well as the challenges face the process of accession, as the study included the following : It dealt with the major elements of the study, which are the World Trade Organization and its principles, Tasks, and Tax System in Iraq and its major components. In addition to the concept of Costume Policy and its means and the relationship between the costume evaluation rules with the WTO agreement.The topic of the study have been presented to a group of specialist (academics and professionals) through a (Focus Group) workshop, the guide of this workshop included three axes which are (a review of the experiences of the states of Lebanon and Jordan, the financial effects of the accession process, and the Challenges that accompany this accession).The researcher use the economic analyzing to make advantage of the information derived from the focus group.The conclusions : 1. The National Commission for Iraq's accession to the WTO composed of members belongs to the public sector from almost all to Iraqi state institutions, they were sleeted according to superior degree in their institutions and not according to their professional efficiency and this considered as the main reason for their inefficiency and limitation in negotiation rounds and the preparation to the accession process.2. Despite government policies to open up to the outside world, especially that regulate the global economy aspects of the financial, monetary and trade, such as the International Monetary Fund, the International Bank for Reconstruction and Development, the World Trade Organization, but the tax legislation is inconsistent with these new trends.Recommendations : Reconsidering the laws of tax specially laws of consumption taxes, namely sales tax, to pave the way to the value added tax. Iraq needs such taxes to cope with the external change, specially these related to trade liberalization and Iraq accession to WTO.

تقويم المعالجات المحاسبية لنفقات مراحل صناعة النفط : بحث تطبيقي في شركة نفط الشمال - شركة عامة Evaluation of Accounting treatments of Expenditure Stages in Oil Industry Applied Research & Field Study in Northern Oil Company

اسم المؤلف: تغريد نجيب يحيى عبد الموجود
اسم المشرف: صلاح صاحب شاكر البغدادي
الموضوع العام: الادارة والاقتصاد
السنة: 2011
الموضوع الدقيق: المحاسبة القانونية
الدرجة: دكتوراه
الجامعة: جامعة بغداد
اللغة: العربية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: In Light of the development in the Oil industry and the entry of the oil investment companies lately, and due to the needs of the local oil companies to deal with foreign companies, which essentially needs a clear and precise accounting basis. All that requires the development of the current accounting treatments methodologies to keep pace with international standards in this industry. The research goal to Evaluating the accountant treatments of expenditures for the stages of oil manufacturing through the introduction to the specialty of this industry and the introduction to the accounting treatments which is being used by the Oil companies which came according to the requirements of the Financial Accounting Standard Board and showing the effect of implementing (IFRS 6) in accounting treatment for the expenditure of the stages of oil manufacturing about the result of the activity compared with what has been implemented by Iraqi Oil companies by using the unified accounting system and to determine the short comings and working on discovering and preventing it when working on presenting the suggestions for the development of the unified accounting system, and Establishing an Iraqi accounting basis to treat the expenditure of the Iraqi Oil manufacturing which is in agreement with the accounting principals in this field taking in consideration the Iraqi environment for this industry, and to implement these goals, the direction of the research in its theoretical part to employ the frameworks and theoretical concepts and the views of the researches in addition to the viewpoint of the researcher herself when the practical side adopted as frequent field visits to the North Oil Company, in order to test the hypotheses of calculations were extracted for the practical aspect of the research using the manual analysis. The research reached to a number of theoretical and field conclusions, the most important are editing a list for the budget for the North Oil Company according to the instruction of the unified accounting system and not on the basis of accepted accounting principles in general in the Oil industry since the unified accounting system mandated all the companies to use it, without singling the Oil industry with list that distinguish it, therefore it didn't appear in the general budget of the company the values of the Oil reserves which is considered to be the most important Oil assets but it showed expenditures for containments and developments of these reserves, and the failure to adopt the nation of depletion, which takes into account the ratio between the produced amount of Oil every year, and the reserved amount, the research came to a conclusion to present a group of recommendations according to the conclusions in the research.

اثر اندماج الشركات على الربح الخاضع للضريبة : دراسة تطبيقية لعدد من الشركات الخاصة Effect Companies Merger on Taxable profit " applied study to some private sector companies "

اسم المؤلف: انوار هاشم عبود
اسم المشرف: مؤيد محمد علي فضل الفضل
الموضوع العام: الادارة والاقتصاد
السنة: 2011
الموضوع الدقيق: الضرائب
الدرجة: ماجستير
اللغة: العربية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: يعتبر الاندماج من اهم الاجراءات الاقتصادية لما يحققه من التكامل والتعاون ومحاولة السيطرة على الاسواق وزيادة الربحية التي يحصل عليها المساهمون عن طريق توحيد ادوات الانتاج، تخفيض التكاليف، زيادة الانتاجية، وتحقيق المزايا التي يسعى اليها المدراء والمساهمون بصورة عامة. لذا فان معظم الدراسات الاقتصادية المعاصرة تدعو الى تشجيع الاندماج بين المؤسسات والمنشات الاقتصادية والمالية، وفي القطاعات كافة لدعم القدرة التنافسية لها، اذ ان الاتجاه نحو الاندماج وعقد التحالفات اصبح خيارا استراتيجيا مهما في مواجهة المتغيرات والتحديات الدولية في عصر العولمة وظهور التكتلات الاقتصادية العملاقة. وقد اكدت هذه الدراسات على ضرورة الاخذ بدوافع ومبررات الدمج ومنها الاعتماد على مؤشرات تقويم الاداء وزيادة القدرة على المنافسة على صعيد الدول ، ومن الوجهة الضريبية لابد من وجود اجراءات لتحديد الربح الخاضع للضريبة لاندماج الشركات اكثر دقة حتى لا تنشا النزاعات بين الشركات والسلطة المالية ويؤثر على الايرادات الضريبية من جهة وعمل الشركات من جهة اخرى. ان مشكلة البحث تتجلى في عدم وجود تعليمات واضحة لتحديد الربح الخاضع للضريبة في سنة الاندماج، عدم وجود اجراءات احترازية للحد من الاندماج الذي يؤدي للتهرب الضريبي، وصعوبة تحديد المعالجات المحاسبية الخاصة باندماج الشركات التي تتفق والمعايير المحاسبية الدولية والمحلية. اما اهداف البحث فهو توضيح الاسس الواجب اتباعها لاندماج الشركات التي تنسجم مع القانون الضريبي وقانون الشركات، وبيان اثر الاندماج على الحصيلة الضريبية. تنبع اهمية البحث من اهمية الموضوع الذي يعتبر من ابرز الحالات التي تتعرض لها الشركات فعملية الاندماج لها دور كبير في تطوير الانشطة الاقتصادية التجارية والصناعية وتبرز اهمية البحث من خلال عرض اهم المشاكل التي تنبع من عملية الاندماج للشركات، وكيفية التعامل معها لتحديد الربح الخاضع للضريبة، وتحديد الاجراءات المحاسبية لعملية الاندماج . | Esteem merger from economy procedures worry, when it realize from integration, coactions, try control on market and increase profitability which get about it stockholders by production tool combination, reduction cost, productivity increase and realization virtue which the merger attempt to it and stockholders especially. That most studies modern economy invite to encouragement merger between foundation and economy establishment &finance, at all sector to support competitive ability to it, then if direction around merger and agreement alliance become important strategic option in facing changeable and international challenge on globalization age and back mammoth economy agglomeration. Affirm this study on necessary taking in impulse and merger from credit on performance assessment finger and increase ability on competition at the level of states, from tax way eternity than being action to definition taxable profit to company merger more accuracy in oddment to being dispute between the companies and government, and effect it on tax revenues and companies making.That research problem appear at absence being instructions apparent to definition taxable profit in merger year, appear being preventive procedures to lend from merger which to be tax evasion and difficulty definition accountant treatment relating to companies merger which agree with international accounting standard and local. Research objective clarification base task adoption it to companies merger which agree with tax law and companies law, expression effect merger on tax revenues. Flow research important from subject importance which consider from relieve case which encounter to it companies merger process to it great seat at development trade economy activities and industrialism, defecation research important from through show problems worry. Which flow from merger process to company, kef trade win it to definition taxable profit and definition accountant procedures to merger process

تقييم تجربة المشاركة الاجنبية في عينة من المصارف العراقية الخاصة Evaluate the experience of the Foreign contribution in sample of respect we Iraqi banks

اسم المؤلف: امال هاشم مطلك
اسم المشرف: حمزة فائق وهيب الزبيدي
الموضوع العام: الادارة والاقتصاد
السنة: 2011
الموضوع الدقيق: العلوم المصرفية
الدرجة: ماجستير
اللغة: العربية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: تشهد الساحة الدولية تطورات اقتصادية وتكنولوجية جعلت العالم سوقا واحدا . ممزااد من مجال المنافسة لكل المتعاملين الدوليين . واصبح السوق يضم دولا وحكومات ومنظمات عالمية وشركات متعددة الجنسيات وتكتلات اقتصادية عملاقة تسعى كلها لتوحيد سلوك اللعبة والتعامل واقتناص الفرص ومواجهة التهديدات في اطار ازالة القيود بكل اشكالهواافرزت هذه الاحداث مجموعة من التطورات ومن ضمنها تنامي موجة الاندماجات والمشاركات التي تعد من بدائل الاستثمار.وفي ظل التحولات الحاصلة في العراق وامتداد ما يجري في الساحة الدولية الى قطاعاته الاقتصادية ، بات العراق مقصدا للاستثمارات المباشرة العربية والاجنبية في ضوء التحسن الذي تشهده بيئة الاعمال والاستثمار وخاصة في قطاع المصارف بعد صدور قانون البنك المركزي وقانون المصارف عام 2004 اللذين تضمنا اطرا قانونية جديدة تسمح بالاستثمار الاجنبي في القطاع المصرفي العراقي .ومع تراجع اسعار النفط في الاسواق العالمية وانخفاض عائداته التي تشكل نحو ثلثي الناتج المحلي الاجمالي للعراق ، اصبح من الضروري جذب المزيد من الاستثمارات الى القطاعات الانتاجية والخدمية المختلفة بهدف تطويرهواتحديثهواالاعتماد عليها كمصدر مهم من مصادر التمويل الاقتصادي . وتنويع القاعدة الانتاجية للاقتصاد المحلي . وخلق فرص عمل جديدة نظرا لما لذلك من فوائد في رفع كفاية التنمية الاقتصادية والاجتماعية المتوازنة بما يسهم من تقليص اسباب التوجه نحو العنف والارهاب.ومن هنا تم السماح للمصارف الاجنبية في الدخول للعراق والاسهام جنبا الى جنب في العمل مع المصارف العراقية الخاصة بهدف تطوير البيئة المصرفية العراقية واكتساب الخبرة لمواكبة هذا التطور .لذا جاءت هذه الدراسة للتعرف على هذا النوع من الاستثمار الاجنبي في العراق من خلال ما يسمى بالمشاركة الاجنبية في رؤوس اموال المصارف العراقية الخاصة . التي تعد تجربة جديدة تمر بها هذه المصارف والوقوف على اثر هذه التجربة في تلك المصارف في تحسين ادائها وما حققته تلك المشاركات لهذه المصارف من زيادة في رؤوس اموالهوزايادة الودائع والارباح وتحسين نوعية وجودة الخدمات المقدمة والمكانة المتميزة للمصرف المشارك سواء في داخل العراق ام خارجه نتيجة تلك المشاركة فضلا عن امكانية التوسع والتطوير لتلك المصارف وقدرتها على مواجهة منافسة المصارف الاخرى دوليا وعالميا.و خلص البحث الى جملة من التوصيات لتعزيز هذه التجربة من خلال معالجة بعض السلبيات التي رافقتها | The international field has witnessed economical and technological developments which made the world one market . this increased the competence among the international dealers . the market, thus comprises states, governments, international organizations, and giant economic blocs which all seek to unify the behavior of the game by dealing and seizing the opportunities and facing the threats which concern deregulation in all its forms . This led to a number of developments including the increasing number of mergers and posts which are considered investment alternatives .In the light of changes taking place in Iraq and the extension of what is happening in the international arena to the sectors of economic, Iraq is a destination for Arab and foreign investment in the light of the improvement seen in the business environment and investment, particularly in the banking sector after the enactment of the Central Bank and the Banking Act 2004, which contained new legal frameworks which permit foreign investment in the Iraqi banking sector. With the decline in oil prices in world markets and lower revenues, which constitute about two thirds of the GDP of Iraq, it became necessary to attract more investment to the productive and service sectors with the aim of developing, updating, and relying on it an important source of economic funding sources and diversify the productive base of the local economy and create new job opportunities, giving benefits in raising the efficiency of economic and social development of a balanced diet, contributes to reducing the causes of the trend towards violence and terrorism. thus foreign banks were allowed to enter Iraq and to contribute together to work with Iraqi private banks in order to develop the Iraqi banking environment and gain experience to keep pace with this development. So this study intends to identify this type of foreign investment in Iraq through the so - called foreign participation in the capital of Iraqi private banks, which is a new experience with these banks and pinpoints the impact of this experience on those banks in improving their performance and achievements dne to the increase in capital and an increase in deposits, profits and an improvement in the quality of services provided and the excellent reputation of the bank co - whether inside or outside Iraq as a result of such participation as well as the possibility of expansion and development of these banks and their ability to face competition from other banks internationally and globally. The research found a number of recommendations to enhance this experience by addressing some of the negatives that accompanied it.

اثر اهمية تطبيق اسلوب المعاينة الاحتمالية في تخفيض مخاطر الحكم المهني لمراقب الحسابات : بحث تطبيقي في ديوان الرقابة المالية - حسابات الشركة العامة للصناعات القطنية The use of property sampling reduce of the Audit dangerous of auditor judgments Applied Research in Board of supreme Audit Accounts of the State Company for Cotton industries

اسم المؤلف: امال محمود كاظم
اسم المشرف: موفق عبد الحسين محمد
الموضوع العام: الادارة والاقتصاد
السنة: 2011
الموضوع الدقيق: المحاسبة القانونية
الدرجة: دكتوراه
الجامعة: جامعة بغداد
اللغة: العربية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: يهدف هذا البحث الى توضيح مزايا اسلوب المعاينة الاحتمالية وما يوفره من قاعدة علمية تمكن مراقب الحسابات من الدفاع مستقبلا عن اي اعتراض على صحة رايه في القوائم المالية من خلال التضييق من الحكم الشخصي بقدر الامكان خلال مراحل عملية التدقيق. وهي دراسة تطبيقية في ديوان الرقابة المالية ( حسابات الشركة العامة للصناعات القطنية ), وقد استخدمت الباحثة في الجانب النظري لتحقيق اهداف البحث المنهج الوصفي الاستنتاجي في جمع وتحليل البيانات المالية للدائرة ( عينة البحث ) للسنة المالية (2008). ولتحقيق اهداف الدراسة الميدانية فقد تم تصميم استبانه تتناسب مع متغيرات مشكلة البحث وفرضياته. حيث وزعت الاستبانة على مدققي البيانات المالية في ديوان الرقابة المالية التي بلغ عددها (100) استبانه وهي عينة غرضيه ( غيراحتمالية ), وكانت الردود (82) استبانه قابلة للتحليل, وهي تمثل نسبة قدرها (82%). وتشيراهم نتائج البحث الى ظهورمخاطرناتجةعن استخدام الحكم المهني ( الشخصي ) لمراقب الحسابات منها مخاطر التحيزوعدم امكانية قياس مخاطرالتدقيق وتمثلت في طريقة اختياراسلوب المعاينة التي تتلاءم مع الهدف من عملية الاختيار, وتحديد الاطار العام للمجتمع محل البحث وتقديرحجم العينة المناسب , واختيار مفردات العينة بطريقة تضمن سلامة تمثيلها للمجتمع الذي سحبت منه, ان تطبيق اسلوب المعاينة في بيئة التدقيق يتطلب من المدقق ان يكون ( ملما باليات تنفيذ هذا الاسلوب بشكل يكفي لتخطيط عملية التدقيق, مع مراعاة عدم التحيزكذلك ضرورة الاخذ بالاعتباراهداف اختيار العينة وخصائص المجتمع الذي ستؤخذ منه العينة وطبيعة ادلة الاثبات المطلوبة) وخلص البحث الى تقديم مجموعة من التوصيات بالاستاد الى الاستنتاجات الواردة فيه | this research aims to clarify the advantages of statistical sampling method and provided the scientific basis of the auditor was able to defend the future of any objection to the validity of his opinion on the financial statements of the restrictions of personal rule as much as possible during the stages of the audit process. An applied study in the Office of Financial Supervision (the company's accounts of the cotton industry), have been used, a researcher at the theoretical side to achieve the objectives of the research methodology descriptive inference in the collection and analysis of financial statements of the circle (sample) for the financial year (2008). To achieve the objectives of the field study was designed questionnaire commensurate with the variables of the research problem and hypotheses. Questionnaire was distributed to the auditors of financial statements in the Audit Court, which reached number (100) questionnaire, the responses were (82) questionnaire are analyzed, representing a ratio of (82%). The most important results of the search importance of the use of professional judgment (Profile) to the auditor, including risk of bias and the inability to measure the risk of audit and was the method of selecting a plan preview that fit with the goal of choice, and select each of the size of the community in question and the sample size is appropriate, selection of sample in a manner ensure the safety of their representation of the community it was drawn, that the application of the style of statistical sampling in an environment audit requires the auditor to be (aware of the mechanisms for implementation of this method is sufficient to plan the audit process, taking into account the lack of bias in order to give each individual the same chance to be among the sample, as well as need to take into account the objectives of sampling and the characteristics of the society that will be taken from the sample and the nature of evidence required). The researcher presented a series of recommendations including : The need for organizations and professional associations to develop and implement training programs for its members to identify the mechanisms of applying the method of statistical sampling in the field of business control and audit, the auditor must also determine when the sample size, statistical risk into account if the audit had been reduced to a minimum

تقويم تجربة تاجير شركات القطاع الصناعي العام الى القطاع الخاص : دراسة تطبيقية في معمل سمنت طاسلوجة - محافظة السليمانية THE EVALUATION EXPERIENCE OF ENTERPRISES LEASING FROM PUBLIC TO PRIVATE SECTOR An empirical research in Tasluja Cement Factory - Sulaimanya Province

اسم المؤلف: اشتي عثمان خورشيد
اسم المشرف: عبد الصاحب نجم عبد الجبوري
الموضوع العام: الادارة والاقتصاد
السنة: 2011
الموضوع الدقيق: المحاسبة القانونية
الدرجة: دكتوراه
الجامعة: جامعة بغداد
اللغة: العربية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: The industrial sector is experiencing a tough economic situation because of many factors such as; the lack of basic resources necessary for operating these industries, achieving a level of product which is necessary for continuing work in these industries, the unavailability of enough fund for them, the lack of experiences and technical skills of workers and managers, unavailability of modern technology such as machinery, equipments, parts...etc. These factors have led to many enterprises to stop production or to operate with a minimal production capacity, which requires reforms through searching for reasonable solutions. This has led to state officials to think of ways for restoring activities of these enterprises. Transferring the asset of these public enterprises to private sector could be one of the ways of restoring activities, as it is regarded one of the contemporary methods of economic reform.It is worth to mention that there are many methods of privatization, or transferring to private sector, such as, asset sale (ownership transfer), management contracts, share ownerships, leasing contracts ...etc. Leasing is considered one of the methods of privatization which has been adopted to overcome the financial, technical, organizational and marketing difficulties which are facing public sector enterprises.This kind of privatization experience has not been formerly evaluated by assessing its success was one of the research problems faced the author. This is an important piece of study because it assesses the level of success of leasing industrial enterprises from public to private sector, the study is also highlights the difficulties and weak points so they can be avoided in the future and also to strengthening its strong points. However, the main aims and objectives of this study is to explain the following : 1 - Concepts and importance of leasing public enterprises to private sector and its impact on the national economic growth.2 - Evaluating this experience in Kurdistan Region and showing its success or failure of generating reasonable revenue for the state, and to achieve other social objectives.Research hypothesis : 1 - Adopting contract lease method based on specific standards will lead to restructuring production lines in these enterprises; it will also lead to secure needs necessary for operating them, which will then achieve the objectives of these enterprises.2 - Using the indices of performance Efficiency in assessing this leasing experience will lead to an outcome which can assess the success or failures of this leasing experience.Due to the importance of this study and also its objectives and hypothesis, the author has adopted a deductive approach in the theoretical side which depends on scientific sources and literatures related to the topic. However for the practical side of the research which applies to the current industrial enterprises in Iraq, a sample of these enterprises has been used (Tasluja Cement Factory) which has been leased to a partnership company (local and foreign) for 12 years. The production activity before and after the lease has been used as a measure; the results have been discussed and analyzed.The author's findings from both theoretical and practical aspects have proved research's hypothesis of that leasing contracts have provided an opportunity of restructuring the strategic industrial enterprises, which the state is not interested to transfer their ownership and they require huge fund for restructuring and increasing efficiency and best exploiting capacities. In addition to that, the process of evaluating the performance through efficiency, capability, economy and other important indices will contribute to identify the differences and find effective solutions by using research findings to review plans and implementing policies. The research shows that there are huge differences of production before and after the lease contract, for example, the decrease of the actual production capacity compared to the projected production, the actual production capacity had not exceeded (%12) of the projected capacity, which means that (88%) of the production capacity was not exploited, this is a huge loss of money and resources. However, and after the lease contract the actual production capacity has reached (99.9%). This shows the capability of the private sector of restructuring the factory and best exploiting of the resources and not losing available resources.Research recommendations : 1 - Reviewing legislations related to investment in particular foreign investment, the lease contract legislations should include punishment conditions which force the leased company to preserve the assets of the establishment.2 - Continuing evaluation of performance is important in all aspects which will have an impact in activating work and identifying strong and weak points and knowing the reasons behind them and finding solutions in one hand and to provide data for service users and the decision makers in another hand.3 - Finally, after examining the sample from all positive and negative aspects, the author is recommending that the experience should be transferred to other non - functioning public factories and enterprises through lease contracts, after taking into consideration all points for restructuring the infrastructure of These Companies.

دور هيكل المحفظة الاستثمارية للمصرف في ادائه المالي : بحث تطبيقي في عينة من المصارف العراقية

اسم المؤلف: استبرق محمود جار الله
اسم المشرف: صلاح الدين محمد امين عبد الحكيم الامام
الموضوع العام: الادارة والاقتصاد
السنة: 2011
الموضوع الدقيق: العلوم المصرفية
الدرجة: ماجستير
اللغة: العربية
مكان الجامعة: بغداد
الصفحات الاولى:

اثر العلاقة بين المدقق الخارجي والمدقق الداخلي في الحد من ظاهرة الفساد الاداري والمالي : بحث تطبيقي في عينة من الوحدات الاقتصادية The Relationship's Impact Between the External and Internal Auditor in Preventing the Administrative & Financial Corruption

اسم المؤلف: ارجوان محسن سعيد زكريا
اسم المشرف: صلاح نوري خلف
الموضوع العام: الادارة والاقتصاد
السنة: 2011
الموضوع الدقيق: المحاسبة القانونية
الدرجة: دكتوراه
الجامعة: جامعة بغداد
اللغة: العربية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: يناقش هذا البحث احد اهم وسائل الحد من ظاهرة الفساد في شركات القطاع العام والادارات الحكومية، وهي علاقة التعاون والتنسيق بين المدقق الخارجي والمدقق الداخلي، في ضوء معطيات معيار التدقيق الدولي (610) وتوصيات المنظمة الدولية للاجهزة العليا للرقابة المالية والمحاسبة (INTOSAI)، والاستراتيجية الوطنية لمكافحة الفساد.واستند البحث الى فرضيتين تمثلت الاولى بضعف علاقة التعاون والتنسيق بين المدقق الخارجي والمدقق الداخلي التي تؤدي الى ضعف اجراءات الحد وتقليل ظاهرة الفساد الاداري والمالي، والثانية ضعف وعي الادارة باهمية هذا التعاون والتنسيق يؤدي الى ضعف اجراءات الحد من ظاهرة الفساد.وتناولت الباحثة مشكلة البحث المتمثلة بوجود ضعف في العلاقة بين المدقق الخارجي والمدقق الداخلي لعدم كفاية التشريعات ومعايير التدقيق المحلية لتحديد طبيعة العلاقة بينهما، وضعف استقلالية المدقق الداخلي في وحدات القطاع العام والادارات الحكومية، عن طريق اربعة فصول، اذ تناول الفصل الاول منهجية البحث ودراسات سابقة، اما الفصل الثاني الذي مثل الجانب النظري، بعنوان اهمية التعاون والتنسيق بين المدقق الخارجي والمدقق الداخلي في الحد من ظاهرة الفساد، وتناول الفصل الثالث الذي يمثل الجانب التطبيقي للبحث، عنوان عرض نتائج دراسة الحالة والاستبانة لعينة البحث.وخلص البحث الى مجموعة من الاستنتاجات والتوصيات، وابرز الاستنتاجات كانت اتفاق اجابات عينة البحث من (مراقبي الحسابات، والمدققين الداخليين والمدراء العامين لوحدات القطاع العام والادارات الحكومية)، على ضرورة التعاون والتنسيق بين المدقق الخارجي والمدقق الداخلي، واهم اساليب التعاون والتنسيق هو عقد اجتماعات مشتركة لتحديد الاهداف المشتركة والتخطيط المشترك وتبادل التقارير الرقابية بينهما، اما التوصيات فكانت ابرزها اصدار معيار تدقيق محلي يحدد اساليب التعاون والتنسيق التي وردت في توصيات المنظمة الدولية للاجهزة العليا للرقابة المالية والمحاسبة (INTOSAI) والتي اتفق عليها عينة البحث فضلا عن ضرورة قيام المنظمات المهنية في العراق المتمثلة بنقابة المحاسبين ومجلس مهنة مراقبة وتدقيق الحسابات باشاعة ثقافة التعاون والتنسيق بين المدقق الخارجي والمدقق الداخلي، وكذلك اضافة مواد قانونية في قانون الشركات رقم (21) و(22) لسنة 1997 (المعدلين) بتحديد واضح لطبيعة العلاقة بينهما. | This research discusses one of the most important means of reducing corruption in public sector companies and government departments, a relationship of cooperation and coordination between the external auditor and internal auditor, in the light of ISA (610), the recommendations of the International Organization of Supreme Audit Institutions (INTOSAI) and the National Strategy to combat corruption. The research was based on two assumptions : the first was weak relationship of cooperation and coordination between the external auditor and internal auditor leads to weakness of measures to curb and reduce the administrative and financial corruption, and the second weakness of the administration's awareness of the importance of this cooperation and coordination leads tothe weakness of the measures to curb corruption.The researcher dealt with the research problem of the weakness in the relationship between external auditors and internal auditors and the weakness of the independence of the internal auditor in the public sector units and government departments, and inadequate legislation and auditing standards local to determine the nature of their relationship, through the four seasons, where the first chapter discusses the research methodology and previous studies, and the second chapter, which represents the theoretical side, entitled the importance of cooperation and coordination between the external auditor and internal auditor to reduce the corruption, and the third chapter, which represents the application to search, view the results of a study entitled the situation and the resolution of the research sample. The research found a set of conclusions and recommendations, and the main conclusions was the agreement about the answers of the research sample from (auditors and internal auditors and general managers of public sector units and government departments) on the need for cooperation and coordination between the external auditor and internal auditor. The most important methods of cooperation and coordination is to hold joint meetings to the challenge the common goals and joint planning (the exchange control reporting between them. While the most prominent recommendations were issue a standard audit local specifies the modalities of cooperation and coordination received in the recommendations of the International Organization of Supreme Audit, Finance and Accounting (INTOSAI), which was agreed by the research sample as well as the need for professional organizations in Iraq represented by the Association Accountants and the Council of the profession of audit and account auditing of spreading the culture of cooperation and coordination between external auditor and internal auditor, as well as the addition of legal materials in the Companies Act (No. 21) and (22) for the year 1997 (amending) a clear definition of the nature of their relationship

تاثير التسويق الالكتروني في عناصر المزيج التسويقي للخدمة التامينية : دراسة حالة في شركة التامين الوطنية Effect e - marketing in the marketing mix elements of the insurance service A Case study at The National Insurance Company

اسم المؤلف: احمد خلف حسين علي الزهيري
اسم المشرف: علاء عبد الكريم هادي البلداوي
الموضوع العام: الادارة والاقتصاد
السنة: 2011
الموضوع الدقيق: التامين
الدرجة: ماجستير
اللغة: العربية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: ظهور التسويق الالكتروني جعل العالم عبارة عن قرية صغيرة لا تتقيد بحواجز المكان ولا الزمان ، الامر الذي ادى الى تحول التسويق في مختلف القطاعات الخدمية الاقليمية والدولية عموما ، ولا سيما قطاع التامين من التسويق التقليدي الى التسويق الالكتروني ، وبذلك اصبح التسويق الالكتروني لخدمات التامين هو الاداة الفاعلة لتحقيق النمو ، اذ استطاع ان يقفز بمجمل الجهود التسويقية الى اتجاهات معاصرة تتماشى مع العصر الحالي ومتغيراته ، وهذا التسارع الكبير في التطور التكنولوجي جعل من شركات التامين تتسابق من اجل تقديم خدماتها التامينية على احدث ما توصلت اليه تطبيقات التقنية الحديثة عن طريق تعدد مواقعها على شبكة الانترنيت . وعلى هذا الاساس تناول الباحث في دراسته موضوع ( تاثير التسويق الالكتروني في عناصر المزيج التسويقي للخدمة التامينية) دراسة حالة في شركة التامين الوطنية ، باختيار عينة قوامها (68) فردا من المدراء او من ينوب عنهم ، وقد استخدمت الدراسة استمارة الاستبانة كاداة رئيسة لجمع البيانات فضلا عن المقابلات الشخصية للمدراء التي اجراها الباحث ، وتم اختبار فرضيات الدراسة التي اهتمت بوجود العلاقة والاثر بين متغيرات الدراسة عن طريق الاساليب الاحصائية ذات الصلة بالموضوع ، ولغرض اختبار فرضيات العلاقة تم اعتماد معامل الارتباط سبيرمان، ولاختبار علاقات التاثير اعتمد معامل الانحدار الخطي البسيط ، وخلصت الدراسة الى مجموعة من الاستنتاجات كان اهمها : 1. هناك ثمة تحديات تحول دون تبني التسويق الالكتروني للخدمة التامينية في شركة التامين الوطنية لحد الان كان ابرزها عدم وجود تشريع قانوني ينظم عمل التسويق الالكتروني ، فضلا عن غياب البنية التحتية اللازمة لمتطلبات التسويق الالكتروني.2. افرزت النتائج بوجود علاقة ارتباط وتاثير لللتسويق الالكتروني في عناصر المزيج التسويقي للخدمة التامينية ، ومن وجهة النظر المستقبلية للمديرين او من ينوب عنهم في شركة التامين الوطنية .3. لدى شركة التامين الوطنية الرغبة بالتحول نحو التسويق الالكتروني لما يوفره من فرص عديدة تعود بالفائدة على مستوى العملية التامينية برمتها .وقدم الباحث في النهاية جملة من التوصيات الى الشركة المبحوثة ، استنادا الى النتائج التي توصل اليها ، والتي كان ابرزها بناء بنية تحتية للاتصالات قوية ومتينة وذلك لغرض تاهيلها في تطوير وتسويق الخدمة التامينية اذ ان النجاح الفعلي لظاهرة التسويق الالكتروني يعتمد على مدى متانة البنى التحتية للاتصالات ولاثرها الكبير في سرعة انجاز الخدمات التامينية. | The emergence of e - marketing to make the world a small village does not comply with barriers, the place nor the time, which led to the transformation of marketing in various service sectors, regional and international general and the insurance sector, especially from traditional marketing to electronic marketing, bringing e - marketing of insurance services is the effective tool to achieve for growth, was able to jump to the overall marketing efforts to the contemporary trends in line with the current era and its variables, and this significant acceleration in technological development has made insurance companies are racing to offer their insurance services on the latest applications of modern technology through multiple sites on the Internet . On this basis, eating a researcher in the study subject (e - marketing service insurance and its implications on the elements mix catalog) through a case study in the National Insurance Company, the selection of a sample of (68) members of the directors or their representatives, have used the study form - resolution as the Chairperson of the collection information as well as personal interviews of managers conducted by the researcher, was testing hypotheses of the study, which focused on the existence of the relationship and effect between the variables of the study by statistical methods relevant for the purpose of testing hypotheses of the relationship has been the adoption of the correlation coefficient Pearson, and to test the relationships influence the adoption of the coefficient of linear regression simple The study concluded that a set of conclusions was the most important : 1. There are challenges to prevent the adoption of e - marketing service for the insurance company national insurance so far, most notably the absence of legislation regulating the work of a legal e - marketing, as well as the absence of the necessary infrastructure for e - marketing requirements.2. Produced results that there is a correlation between the impact of e - marketing and elements of the marketing mix for service insurance, and the view of the future managers or their representatives in the National Insurance Company.3. The National Insurance Company desire to shift towards e - marketing it offers many opportunities that benefit the entire insurance process level. And the researcher in the end, a number of recommendations to the company researched, based on the findings, and most notably building a communication infrastructure strong and durable, for the purpose of rehabilitation in the development and marketing of insurance services as the real success of the phenomenon of e - marketing depends on the robustness of the communications infrastructure and the great impact in the speed of delivery of insurance services

تقييم الاداء المالي في النظم المصرفية : دراسة مقارنة لعينة من المصارف الخاصة الاسلامية والتقليدية في العراق للمدة 2010 - 2015 Assess the financial performance of the banking systems (a comparative study of a sample of private Islamic and conventional banks in Iraq for the period 2010 - 2015)

اسم المؤلف: حيان ياسين عبد الله محمد الحياني
اسم المشرف: علي عبد محمد سعيد الراوي
الموضوع العام: الادارة والاقتصاد
السنة: 2016
الموضوع الدقيق: العلوم المالية والمصرفية
الدرجة: ماجستير
اللغة: العربية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: تؤدي المصارف بنحو عام دورا هاما في الحياة الاقتصادية فهي تعمل كوسيط بين المدخرين والمستثمرين لذلك فهي تعمل على تحريك عجلة الاقتصاد الوطني وزيادة نموه ونظرا لاهمية الجهاز المصرفي عموما والمصارف الاسلامية خصوصا حيث جرى العمل على تحليل ادائهوامقارنتها بالمصارف التقليدية من اجل اثبات فرضية البحث التي استندت على ان المصارف الاسلامية في العراق تمتلك مقومات النجاح التي تمكنها من منافسة المصارف التقليدية وفي سبيل تحقق ذلك استخدم اسلوب تحليل النسب المالية على عينة تتكون من (6) مصارف (3) مصارف اسلامية خاصة و(3) مصارف تقليدية خاصة باستخدام عدد من النسب التي تم اختيارها على اساس امكانية تطبيقها على كلا النوعين من المصارف . وفي سبيل تحقق هدف البحث تم تقسيمه الى ثلاثة فصول رئيسة تضمن كل فصل منها ثلاثة مباحث تناول الفصل الاول منها اسس التحليل المالي , وتطرق الفصل الثاني الى المصارف الاسلامية والتقليدية من حيث (الاطار العام ,الاهداف وادوات الاستثمار) وناقش الفصل الثالث تحليل اداء بعض المصارف الخاصة الاسلامية والتقليدية في العراق للمدة (2010 - 2015) . وبذلك توصل البحث الى مجموعة من النتائج التي ثبت صحة الفرضية على الرغم من وجود بعض المؤشرات السلبية في بعض الجوانب ومن اهم هذه النتائج ان متوسط نسب السيولة المحققة من قبل المصارف الاسلامية اكبر من نسب السيولة المحققة من قبل المصارف التقليدية , واما فيما يخص نسب الربحية للمصارف الاسلامية فكانت اقل من متوسط نسب ربحية المصارف التقليدية عدا نسبة ( صافي الربح الى اجمالي الودائع) اذ حققت المصارف الاسلامية فيها متوسط نسب اعلى من متوسط نسب المصارف التقليدية . كما ان المصارف الاسلامية حققت متوسط نسب توظيف في (الاستثمارات/ الودائع) اقل من متوسط نسب توظيف المصارف التقليدية , واما فيما يخص نسبة (الائتمان النقدي / اجمالي الودائع) فقد استطاعت المصارف الاسلامية من تحقق متوسط نسبة اعلى من متوسط نسبة المصارف التقليدية . واما فيما يخص نسب الكفاية فقد حققت المصارف الاسلامية متوسط (نسب كفاية في راس المال) اعلى من متوسط (نسب كفاية راس مال) المصارف التقليدية . اما بالنسبة للتوصيات فكان اهمها ضرورة استغلال الموارد في صيغ مختلفة وعدم اقتصاره على صيغة المرابحة مع العمل على استخدام احدث اساليب منح الائتمان لتقليل الخسائر خصوصا في المشاركات والمضاربات . | Banks in general play an important role in economic life, They are working as an intermediate between savers and investors Thus, They are working on moving the wheel of the national economy, and increase its growth. Given the importance of the banking system, Generally, and Islamic banks, especially, where work was to evaluate the performance of Islamic banks , comparing With The conventional banks, to prove the Research Hypothesis, which was based on that the Islamic banks in Iraq have the Success factors that will enable Them to compete with the conventional Private banks : In order to achieve that, it was used the "Financial Ratio Analysis" on a sample consists of (6) Banks : ( 3) Islamic Private banks and (3) conventional banks using a number of ratios that have been selected, based on their applicability to both types of banks . In order to achieve the goal of research was divided into three main chapters, every chapters, including three sections, first chapter dealing with foundations of financial analysis, and the second chapter discussed the Islamic and conventional banks in terms of (the general framework, objectives and investment instruments), the third chapter Discuss, analysis performance of some Islamic and conventional private banks in Iraq for the period (2010 - 2015). ……………………….. Thereby, the research concluded a group of results that substantiate the hypothesis, in spite of negatives in some aspects, and the most important of these results is that the average liquidity rates achieved by Islamic banks are bigger than Liquidity rates, achieved by the conventional banks; The profitability ratios of Islamic banks were less than the average profitability rates of conventional banks, except (net profit to total deposits), ratio Where Islamic banks have achieved rates average is higher than the rates average of conventional banks. Also, Islamic banks rates average, achieved in the employment (investments / deposits), less than the average rates of employment of conventional banks; is The proportion (cash credit / total deposits) of Islamic banks has been able to achieve a proportion average higher than the rate average of conventional banks. As regards the adequacy ratios, Islamic banks have achieved an average (adequacy ratios in the capital)That is higher than the average (capital adequacy) of conventional banks, and also higher than the specific rate by the Central Bank rates. As for the most important recommendations was the need to exploit resources in different formats and not confined to the (Murabaha) with work on the use of most recent methods of granting credit to reduce losses, especially in the (Musharakah) and (Mudarabah

تاثير التوجه الاستراتيجي في القرار الاستراتيجي : دراسة تحليلية في ديوان وزارة التخطيط والجهاز المركزي للاحصاء / بغداد The impact of the strategic direction in the strategic decision Analytical study in the Ministry of planning and central Statistical in Baghdad

اسم المؤلف: اية محمود سلمان
اسم المشرف: قيس ابراهيم حسين
الموضوع العام: الادارة والاقتصاد
السنة: 2018
الموضوع الدقيق: ادارة اعمال
الدرجة: ماجستير
اللغة: العربية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: The main objective of the research is identify the impact of the strategic direction on the the dimensions of ( vision , mission , strategic goals , and values) in the strategic decision by focusing on the descriptive approach to the decision, in the Ministry of Planning and Central Bureau of Statistics. The research was conducted on a sample of 124 directorates in this ministry ( general manager - assistant director - heads of department - and official of the people ). The study included two main hypotheses , the first of the correlation relationship and the second of the effect between the research variables . several statistical methods were used in the analysis of the data ( arithmetic mean , standard deviation , coefficient of variation , correlation coefficient , and linear regression ) based on the output of spss program , the main tool for data collection.The researcher reached a number of conclusions , the most important of which are : - 1 - There are significant correlations between the dimensions of the strategic direction and the delineation of the descriptive approach to the strategic decision in general the correlation between the dimensions of these two variables has contributed to the overall enrichment of this relationship.2 - there is a significant effect between the strategic direction and the descriptive approach to the strategic decision , indicated that these dimensions have the ability to influence that choice of descriptive approach to the strategic decision.The researcher made a set of recommendations based on the results that were monitored most importantly : 1 - the need to pay attention and enhance the adoption and the strategic direction and the preparation of its requirements, for its active role in choosing the descriptive approach to the decision at the ministry of planning and central of statistics.2 - the research sample should intensify its effort regarding the study of the strategic direction to identify its importance and the role of its dimensions in strengthening and strengthening the capacities of the ministry of planning and central statistical organization and their potentials and thus making their strategic decisions.

تاثير التسويق المستدام في تحقيق الميزة التنافسية : دراسة تطبيقية في الشركة العامة للمنتوجات الغذائية The effect of sustainable marketing in achieving competitive advantage A prospective study in The General Company for Food Products

اسم المؤلف: اسامة محمد حماد
اسم المشرف: معتز سلمان عبد الرزاق
الموضوع العام: الادارة والاقتصاد
السنة: 2018
الموضوع الدقيق: ادارة اعمال
الدرجة: ماجستير
اللغة: العربية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: تناولت الدراسة عددا من المتغيرات منها المتمثلة بالميزة التنافسية وكيفية تحقيقها من خلال التركيز على تبني مفهوم التسويق المستدام ، اذ ان الشركات العالمية بدات في تبني استراتيجية تسويقية جديدة اخذة بنظر الاعتبار الاستدامة البيئية وعدم الاضرار بالمجتمع من دون اغفال هدفها الدائم للربح ، وبسبب ماتعانيه شركات الصناعة الوطنية من انخفاض حصتها السوقية والتراجع في انشطتها جاءت فكرة الباحث من منطلق الدور الذي يمارسه التسويق المستدام بابعاده ( التسويق الابتكاري ، التسويق الموجه للزبون ، تسويق قيمة الزبون ، تسويق الاحساس بالرسالة ،التسويق الاجتماعي ) في تحقيق ميزة تنافسية للشركة تمكنها من تحقيق التفوق في السوق، وتهدف الدراسة الى تناول تاثير التسويق المستدام في تحقيق الميزة التنافسية وذلك من خلال اختبار فرضيات رئيسة عدة تفرعت منها فرضيات فرعية لمعرفة علاقة الارتباط والتاثير بين متغيرات الدراسة وللاجابة على التساؤلات المتعلقة بالدراسة استخدم الباحث اسلوب العينة القصدية والمقابلات الشخصية والمعايشة الميدانية والاستبانة كاداة قياس ، اذ تم اعدادها بالاستناد الى المراجعة النظرية للادبيات وباستعمال مدرج ليكرت الخماسي ، وتم اخضاعها لاختبارات الصدق والثبات، اذ وزعت 56 استبانة على من هم بدرجة (مدير ،معاون مدير، اعضاء مجلس الادارة ، رؤساء اقسام ، ورؤساء الشعب) ، وللتحليل الاحصائي تم استعمال عددا من المقاييس الاحصائية منها : النسب المؤية والتكرارات ، تحليل المتوسطات ، الانحراف المعياري ، تحليل الانحدار المتعدد وذلك بالاعتماد على برنامج (spss) لاختبار الفرضيات وبرنامج (Excel) في ادخال البيانات ومعالجتها | This study has dealt with a number of variables which include the competitive advantage and how to achieve it through focusing on adopting sustainable marketing concept، as the international companies start adopting a new marketing strategy taking into consideration the environmental sustainability and not to cause harm to the society without overlooking their primal goal for profit. Because of the national companies suffer from decreasing their market shares and the regression of their activities، here comes the idea of the researcher from the role sustainable marketing is playing in its dimensions (innovational marketing، customer oriented marketing، customer value marketing ,sense - of - mission marketing and social marketing) in achieving competitive advantage that enables the company to achieve privilege in the market.The study aims at discussing the influence of sustainable marketing in achieving the competitive advantage through testing various main hypothesis from which sub - hypothesis has emerged in order to know the correlation and the influence relationship among the study variables and in order to provide an answer to all the inquiries related to the study. The researcher employed the intentional sample method، personal interviews ، field co - living and questionnaire as measuring methods. These have been made according to hypothetical review of the literature by using Lekert’s pentamerous plan. They are subjected to integrity and proof testing as 56 questionnaires were distributed among those who were as the degrees of ( manager، associate manager ، member of board ، heads of departments and heads of divisions ). For the statistical analysis a number of statistical measurements are used that include (percentages، ratio frequencies averages analysis، standard deviation and multiple regression analysis) by depending on (SPSS) programme to test hypothesis and (Excel) programme in data entry and processing.

ثاثير اندماج العاملين في ريادية الاعمال : دراسة تطبيقية لعينة من الشركات العائلية في بغداد The impact of employee engagement on entrepreneurship

اسم المؤلف: درداء عبد الملك محمود
اسم المشرف: صلاح الدين حسين الهيتي
الموضوع العام: الادارة والاقتصاد
السنة: 2018
الموضوع الدقيق: ادارة اعمال
الدرجة: ماجستير
اللغة: العربية
مكان الجامعة: بغداد
الكلمات الدلالية:
  • Employee engagement
  • Entrepreneurship
  • Family firms
الصفحات الاولى:
المستخلص: his study aimed at diagnosing the effect of employee engagement on its dimensions (vigor, dedication, and absorption) in entrepreneurship in its dimensions (innovation, proactive, taking risk, and VisionEntrepreneurship). Include the study community a number of family businesses in Baghdad, represented by (30) family firm, and The sample consisted of (112) individualsHowever, the number of questionnaires returned was (91) to shareholders in family businesses distributed to (Commissioner, Deputy Commissioner, Board Member, Head of Section or Division).In order to achieve the objectives of the study and test hypotheses, the analytical descriptive method was used. The questionnaire was used as a main tool for measuring and collecting data. It included (44) questions, as well as the interview program, the Statistical program was used (SPSS V.23) in the analysis of data based on a set of statisticalmethods, notably : mean, standard deviation, coefficient of variation,simple linear correlation coefficient, multiple regression analysis. Thestudy also reached a number of conclusions, the most important ofwhich were : 1. The existence of significant correlation and effect between the employee engagement in its dimensions (vigor, dedication, andabsorption) and the entrepreneurial dimensions (innovation, proactive, taking risk, and Vision Entrepreneurship). 2. There is a clear difference in the intensity of the effect of the dimension (vigor and absorption) compared to the dimension (dedication) when using the method (Stepwise), although these dimensions have high estimates in the results of descriptive statisticsAs the researcher presented a set of recommendations, the most important of which were : 1. The need to give attention to the companies surveyed for everything that would strengthen the vigor of their departments, and enrich the workto achieve better levels of absorption.2. The need for government institutions to encourage and support the industrial capabilities of family businesses by giving them more opportunities and opening the way for them to submit their development plans and ideas and apply them in the form of successful projects offering various products and services.

التنوع الثقافي ودوره في تحقيق الميزة التنافسية : دراسة تطبيقية في شركة اسيا سيل للاتصالات المتنقلة Cultural diversity and its role in achieving competitive advantage Applied study in Asia - Cell Communications Company

اسم المؤلف: اسراء احمد منصور حسون
اسم المشرف: قيس ابراهين حسين
الموضوع العام: الادارة والاقتصاد
السنة: 2018
الموضوع الدقيق: ادارة اعمال
الدرجة: ماجستير
اللغة: العربية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: The objective of this research is to address the issue of cultural diversity in one of the telecommunication organizations operating in Iraq, namely, Asia Cell, and its relation to the competitive advantage of the organization. After a number of questions were raised about the level of cultural diversity in the organization and the level of achieving the competitive advantage achieved by that organization, Cultural diversity is of great importance in introducing new managerial and innovative ideas that contribute to the achievement of a competitive advantage, the management's position on cultural diversity and the extent to which this diversity contributes to the achievement of a competitive advantage.In order to achieve the objectives of the research, a field study was carried out after hypothesizing the existence of a significant correlation between cultural diversity and competitive advantage and the existence of a relationship of significant significance for cultural diversity in competitive advantage. A questionnaire was designed and presented to a group of arbitrators, The company has reached 102 employees to benefit from the information obtained from them and analyzed through the statistical program (SPSS).The results of the research showed a relationship between cultural diversity and its dimensions in the organization and the competitive advantage and its dimensions, as well as the relationship of the impact of cultural diversity and its dimensions in achieving the competitive advantage of the company. The researcher reached a number of conclusions through the presentation of the theoretical aspect of the research and then the results related to the practical aspect. The most important of these was that cultural diversity has a clear role in achieving competitive advantage. It contributes to achieving excellence and obtaining competitive advantage. Cultural diversity in the dimensions of the competitive advantage of the organization in question, and predicted that the researcher will be cultural diversity in the coming decades an essential advantage of organizations seeking, especially in the circumstances of globalization and its challenges.The research reached a number of recommendations, the most important of which is that the management of organizations must strive to achieve the competitive advantage of their organizations according to the latest findings of the researchers to excel at other organizations that share the same field. Among the most recent is cultural diversity, which must be in accordance with the standards of competence and skill and diversification of expertise . And the need to raise awareness among the workers in the organizations of the importance of respect for other cultures and deal with them positively and not to limit interest in the negative competition with those cultures or overcome. And that the presence of minorities, including women in the organizations should be a source of enrichment of these organizations and non - sensitization of their presence these minorities may be effective in certain areas can be used.

دور السياسة النقدية في تحقيق الاستقرار النقدي في العراق للمدة 1999 - 2015 The role of Monetary policy in chieving the Monetary stability in Iraq for the period (1999 - 2015)

اسم المؤلف: اروى حاجم سلطان الدلیمي
اسم المشرف: افتخار محمد مناحي الرفیعي
الموضوع العام: الادارة والاقتصاد
السنة: 2018
الموضوع الدقيق: العلوم المالية والمصرفية
الدرجة: ماجستير
اللغة: العربية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: Research aims to study the effectiveness of quantitative tools of monetary policy in Iraq and its effect on the dependent variable of monetary stability، To answer thequestion of ( the monetary policy in Iraq has been able to achieve the monetary stabilityfor the period 1999 - 2015?..The research was based on the qualitative (descriptive) approach and the method (economic measure) to confirm the validity of the conclusions research.It results standard from the test (linear regression), the research concluded that،the quantitative monetary policy tools، have n’t affected the monetary stability for theperiod (1999 - 2015) except for treasury transfers, where were found to have a significant impact on the monetary stability calculated according to the fifth model ( the surplus of aggregate demand in the case of the closed economy in Iraq for the period 1999 - 2015) and on the monetary stability calculated according to the method of the sixth model (the surplus demand criterion in the case of the open economy In Iraq for the period 1999 - 2015).

موقع تل الذهب في ضوء التنقيبات الاثرية Tell Al - Thahab Site In The Light of The Archaeological Excavations

اسم المؤلف: علي احمد عبد اللطيف التميمي
اسم المشرف: قصي صبحي عباس الجميلي
الموضوع العام: علم الاثار
السنة: 2017
الموضوع الدقيق: الاثار القديمة
الدرجة: ماجستير
اللغة: العربية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: 1. The study shows that Tel Al - Thahab is one of the important archaeological sites that settled in the Diyala river basin along with the Asmar and Khafaji and Ashjala Hills sites and afford those sites of important cultural signs. Tel Al - Thahab was also associated culturally with Hamrin Basin sites including Tel Selima and Tel Halawa and yalki and this is shown by Architecture remains and archaeological finds through the clear resemblance.2. The excavations at the site resulted in finding three periods of civilization chronologically with the emergence of one of the period of the Early Dynastic period, Akkadian period and old Babylonian period, and it shows through the five Layers, and most likely that the site has passed early settling before Early Dynastic period due to the presence of remnants of building materials and rubble buried floors, but the emergence of underground water has prevented the completion of exploration and study of the remains.3. No clay tablets or written signs were discovered in Tel Al - Thahab to help the researcher to know the name of the settlement as it took the current name from the neighboring residents.4. The Architecture remains at the site showed that it was in a form of residential settlement in terms of the presence of the remains of habitation houses separated by narrow alleys, and what a variety of architecture features those houses carry, as well as the presence of kilns, stoves, docks, small warehouses, tombs that were buried under the floors of houses rooms.5. The remains of building lasted four layers level detected by excavations, The study of the archaeological site describes the clear similarities in the housing of the fifth layers houses in their first and the second floors, which dated back to the period of the Early Dynastic period which is the most likely date back to the period of the of the second and third Early Dynastic period in terms of the use of plano - convex bricks, which commonly its use a lot in this period compared with architecture plans that appeared in other sites. We note some variables in the house plan me within the first floor from the house plan in the second floor and indicate structural renovations at the site.6. The Akkadian House in the fourth layer shows the clear Architecture transfer from house plan for in the fifth layer, and notes that the constructor has chosen another place a little far from the former houses of the fifth layer, and the house took a different plan that gives the impression of architecture period in respect to house plans like the magnitude of the walls and the use of square shape bricks.7. The dwellings in the second and third layers of the site, which in turn go back to the old Babylonian period, had took another shape of planning and general details of the house, The house has a large front yard surround by several rooms , and we find that the construction of the walls is straight and regular and used special bricks in this e period, This is confirmed by the similarity in the dwellings with other sites back to the same period and artifacts found by the excavations within those houses.8. The study shows that the Tel Al - Thahab is rich with artistic products highlighted by archaeological findings including pottery, pottery plaques, seals, stone and metal materials.9. The pottery ware is a significant product among of the site in terms of the presence of pottery oven with the pottery remains within one of the layers, The shapes and sizes of pottery varied, and goes back to three cultural levels, as we note that the quantity of Early Dynastic period pottery is greater, characterized by large jars size, which were found inside the graves as a burial gift which is very similar to pottery jars uncovered by archaeological excavations in Tel Asmar and Khafaji. The clay color and the degree of burning varied from one jar to another.10. The Production of pottery types continued in Akkadian period. This period singled out close similarity with pottery models from Early Dynastic period, The study indicated the presence of other pottery forms like beautiful pottery pots that carry a variety of artistic inscriptions confirmed by researchers to be dated back to the late Akkadian period. As for the old Babylonian period pottery which has taken its own shape, like the color of clay ,The degree of burn, style pottery ware as well as the overall shape of the pottery jars and were mostly medium - sized, mostly known for the and small base that we find in the Hamrin basin sites.11. Sculptures and pottery plaques indicate that the site widely played an important role in the implementation of art works and this is evident through the great numbers uncovered by archaeological excavations which is most likely manufactured inside the settlement and thus art works are locally made.12. The sculptures and pottery plaques were characterized by abstract and realistic style and reflect the difference in style which intellectual diversity, reflecting the civilization and cultural side represented by the cultural or civilizational levels within the settlement.13. The sculptures and pottery plaques reflected a great deal of the prevailing of life at that time, including the hairstyles and different postures, forms show decorations, clothing, some other symbols life. These art works also reflected concern in animals’ shapes of such as cattle and birds.14. The scene cylinder seals suited the subjects that summed up by every period , The seals included subjects related to ancient myths, some of which represent introduction scenes before gods and others reflect the social aspect and the other represents the state of the conflict between humans and animals and the conflict of animals among themselves.15. The style of sculpture on seals varied from the period to another, Some of them had been carried out in a manner of deep cut, and some other in a shallow cut, The seals varied in type and color of stones they were made of to the characteristic of each period.16. The study shows that the site contained a diverse number of stone artefacts which refer to a possibility that the settlement presented various types sculpture on stone used as a housework , Architecture and other related to decoration.17. The site contained a good number of metal materials which emphasizes the possibility that the inhabitant of the settlement executed technical metal variety includes tools with the home use including pots and cups and some are used in hunting and self - defense like daggers and arrows, and manufactured artworks other belong to decorations. Those different metal works like bronze alloy and others made of copper metal.18. The study shows the site had witnessed a wide commercial activity and cultural openness with the ancient settlements in terms of the similarity of most of the findings with other sites in northern and southern Mesopotamia in particular, The existence of variety of precious stones including carnelir, lapis lazuli which is implemented in the form of cylindrical seals and some are used in the decorations. As well as economic exchanges trade which includes mineral raw materials such as copper, which in turn interfere in the process of manufacturing metal business.

الاديرة والكنائس المسيحية في مملكة الحيرة في ضوء المصادر التاريخية والتنقيبات الاثرية حتى نهاية القرن الثاني الهجري/ الثامن الميلادي Christian monasteries and churches in the Kingdom ofHira in the Light of Historical Resources and Archaeological Excavation Till The End of Eighth Century A.D - Second Century Hegira

اسم المؤلف: نبيل عبد الحسين راهي
اسم المشرف: نسيبة محمد الهاشمي
الموضوع العام: علم الاثار
السنة: 2016
الموضوع الدقيق: الاثار الاسلامية
الدرجة: دكتوراه
اللغة: العربية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: Politically and historically : the Kingdom of Al - Hira was an independent Arab kingdom never submitted to the Sassanid empire, neither politically or militarily. It had joint protection treats and political relations with this empire.Religiously : Al - Hira was a multi - religion kingdom. At its early days it embraced many religions including both Heathenism and Judaism. No historical proof indicates that Al - Hira had embraced the religion of Sassanid as this didn't suit the Arab religious belief. Once Christianity arrived at Iraq, the inhabitants of Al - Hira were amongst the first people who believed in and embraced it to the extent that it became the religion of the majority of Al - Hira inhabitants. Before the advent of Islam, the official religion of Al - Hira was Christianity. Doctrinally, the people of Al - Hira didn't agree with other Christian sects about the nature of Christ and his virgin mother; they followed Nestorian's Doctrine which then became Eastern Christianity which spread from Al - Hira towards east to the far China. The bishop of Al - Hira was the protector of this belief. In Al - Hira there were many schools that taught this belief's theology; the most prominent Nestorian bishops. The religious architecture, especially Christian architecture some of which were revealed by archaeological excavations, was incomplete in that excavations did not reveal it completely or those which were found were destructed buildings. These buildings were monasteries or churches influenced by local architecture trends of ancient Iraq; they were not influenced by Christian architecture that was found in other neighboring countries. In the following we will brief the characteristics of the architecture in Al - Hira at that era : Monasteries : The monasteries were discussed through the historical resources and literature. The names of the famous monasteries in Al - Hira were mentioned. Texts were analyzed to determine the architectural and graphic elements of these monasteries and compare them with those the archaeological excavations revealed Christian monasteries in Al - Hira. Another resource was the archaeological excavations where foundations and traces of three monasteries; namely Qasseer, Ain Shayie and Abdul - Messiah monasteries, were found. The resources of the study of excavations depended upon scientific reports of missions, previous studies, authentic reports manuscripts, most of which were redrawn by the researcher to lighten the unclear ones. The monasteries found during excavations lacks a lot of elements mentioned by historical resources, such as monastic hermitages and cells, which characterize monasteries.Churches : Through the samples tackled by the study, three types of church planning were revealed : 1 - The type of one portico which ends at altar. This type was found in the monasteries of al - Qasseer.2 - The three - structure type with oratory which depends of pillars dividing among such porticos. Of this type was the church no.(11) found by the mission of Oxford University in 1931 and Al - Rahhaliya Church.3 - The three - structure type with oratory which depends on walls that divide porticos, such as those of Ain Shayie which were found by the Japanese mission.The roof design system depended upon semi - cylindrical vault and dome in general. However excavations didn't show these elements in a clear and complete way, architectural data suggest that. As for direction, churches didn't obey apostles' instructions that dictated direction towards east; they were deviated in different degrees towards south - east. Concerning architectural design, the monasteries and churches of Al - Hira were not influenced by a foreign architecture, but inspired by ancient Iraqi architecture, unlike those of Syria and Egypt which were influenced by Roman Culture.

نصوص اقتصادية وادارية غير منشورة من زمن سلالة اور الثالثة (2112 - 2004ق.م) Unpublished Economic and Administrative Texts from Third Dynasty of Ur Era (2112 - 2004 B.C

اسم المؤلف: وجدان ناصر حسين الحميداوي
اسم المشرف: نوالة احمد محمود المتولي
الموضوع العام: علم الاثار
السنة: 2015
الموضوع الدقيق: الدراسات المسمارية
الدرجة: ماجستير
اللغة: العربية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: Third Dynasty of Ur emerged on the political scene in Mesopotamia after the fall of the Akkadian Empire, and ruled for nearly a century (2112 - 2004 BC) in which five Kings ruled are Ur - Nammu(2112 - 2095 BC)and after him his son (Šulgi 2094 - 2047 BC),(Amar - Sin2046 - 2038 BC),( Šu - Sin 2037 - 2029 BC) and (Ibbi - Sin 2028 - 2004 BC) the last King of the dynasty.The country witnessed during the rule of this dynasty economic , cultural and significant prosperity with rose of the Sumerians of military, political, administrative, social, economic and urban achievementsFrom significant evidences of economic prosperity of Third Dynasty of Ur era is what the legacy of this dynasty Kings of records especially on clay and other materials by tens of thousands of cuneiform texts in the Sumerian language, Economic texts constituted the great majority of these texts it is clear evidence of the growing and prospered economic activity in this era.Most of these texts found in important Sumerian cities sites ruins in central and southern Mesopotamia such as(Ur ,Nippur ,Umma (Tell Jokha) Lagash( Telul Al - Hiba),Girsu (Tellu) ,Ishan Maziad ,Dreihem(Buzur - Dakan) as well as Kirshana city and other cities and other archaeological sites.The importance of study the economic cuneiform texts of third dynasty of Ur era being provide us with important information about economic and administrative systems of Mesopotamia during that era by providing us with exporting and importing mutual commercial material with all categories as well as the value of trade by changing economic data.As well as knowing a lot of the terminology is still used today as long as we thought it came from the neighboring countries of Iraq.From the reasons made us to choice of texts from the third dynasty of Ur era is the group available from clay tablets but unpublished in the Iraqi Museum which constitute the great majority are clay tablets of this era are confiscated but it is not belong for the scientific excavations of archaeological sites on the other hand, the wealth of information provided by these texts in economic and administrative sides of that era as well as names of people and cities remained confused or unknown some On this basis was selected thirty clay tablets the subject for this thesis, which its texts date with the reign of King Shulgi , King Amar Sin , King Shu - Sin and King Ibbi - Sin and we see its title to be( Unpublished economic texts from the third dynasty of ur era 2112 - 2004 B.C) The study is divided into three chapters and historic summary of third dynasty of ur era. Chapter 1 : is devoted to the study of cuneiform texts and this chapter contain two topics ,the first deal with study of contents and classification of cuneiform texts , the second topic included the study of unpublished cuneiform texts from cuneiform texts reading , translation and vocabulary analysis contained therein.Chapter 2 : devoted to the study of people name and seals impression this chapter contain two topics, the first topic deals with mentioned names in unpublished texts in terms of the place of name and its analysis and give the meaning as much as possible.The second topic included the study of seals printing mentioned in the study texts Chapter 3 : devoted to know ownership of the texts and this chapter contained two topics.The first topic addressing month names study contained in the texts the second topic included a study of the important Sumerian cities such as Umma ( Tell Jokha) We must address a number of the conclusions reached by the study of cuneiform texts . The study also included a number of annexes included a number of lists with names of people, cities and Gods and vocabulary contained in cuneiform texts, as well as the number of tabletsand copying of texts and pictures of clay tablets and then provided a list of Arabic and foreign references, which we adopted in the study of texts and finally outlined a thesis summary in English.It is worth mentioning that the writing of cuneiform texts that we have adopted in this study were as common in Sumerian global cuneiform sources. And we address to write the Sumerian word with ordinary Latin font and Akkadian vocabulary and words written a Latin italic font. Finally we ask Allah that we have succeeded in writing this thesis and add a new source for archaeological library and conciliation from God

نصوص مسمارية غير منشورة من العصر البابلي القديم Unpublished Cuneiform Texts from Old Babylonian period

اسم المؤلف: هند شهاب احمد العبيدي
اسم المشرف: باسمة جليل عبد
الموضوع العام: علم الاثار
السنة: 2015
الموضوع الدقيق: الدراسات المسمارية
الدرجة: ماجستير
اللغة: العربية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: Mesopotamia was considered well - known one of the most civilization in the ancient Near Eastern Region especially in its oldness and originality. It witnessed many achievements in different fields, which extended its impact regional and interregional.One of the most important achievements was cuneiform writing that appeared as a result of need to inscribe and register the commercial affairs, which could be considered as an important factor that reflect the requirements in Mesopotamian civilization.cuneiform texts are the most important sources, which played a prominent role in the identification of political, economic and religious conditions as well as related activities in Mesopotamia. It contains a wealth of information that signs the civilization and its knowledge in all aspects after the writing became the main way to keep the science and knowledge of the humanity.Regarding the significance of writing especially cuneiform ,like other researchers, I decided to specialize in this field, especially in the discipline related to the ancient Babylonian period.After the collapse of the Empire “The Third Dynasty of Ur ”, many changes were happened and this included different aspects of life. The most prominent event was the political division of Mesopotamia into several states that were competing with each other. The situation continue on in this way until „Hammurabi‟ the king of Babylon was able to control the whole region and achieved a political union.According to this issue my research project depends on choosing a collection of confiscated tablets in the Iraqi museum, unfortunately some of them were damaged, their signs weren't clear and others were incomplete. In addition to, its location is still unknown because it did not come through archaeological excavations but from illegal digging or looting, that caused particular loss of the tablets. This caused difficulties to interpret the texts that lost their contexts. ( A ) The research is divided into four chapters. Chapter one was divided into three sections. Section one contains a brief historical introduction about the Old Babylonian period, While the second section includes the city of Larsa in a brief study on the nomination of the city , its location and the history of excavations and the city's history, for a number of reasons, including, the fact that most of the historical date formula of the texts contained Find back to the kings of Larsa, and the other reason they are considered one of the important cities that have emerged and grown strength during the Old Babylonian period and annexed the many of cities and City - States that have become affiliated administratively and politically, The third section included the city is a city Kisurra (Tel Abu Hattab), as we can through Study historical Date formula and analysis, to determine the ownership of the texts into this city, we have reviewed the city in a brief study on the nomination of the city, its location , date of the excavations and the kings and the most important achievements.Chapter two was divided into two sections, the first section we reviewed the contents of the texts that we have studied in this research. The second section includes reading, translating and analyzing the cuneiform texts after being divided into groups according to their subjects. The third chapter was divided into three sections, the first section includes reading, translating and analyzing of historical Date formula contained in most of the cuneiform texts. The second section ,we deal with the study of the meanings of the personal names mentioned of t in this research. The third section included historical study of personality (Šamaš é - a). Among the texts which mention the name of this personal. Chapter four begins with the conclusions we reached in this research, and then divides into three sections, section one reviews the tables, those tables explaining the areas, measures and weights which were mentioned within the texts. Section tow deals with the indexes, which were as follows : the proper names, names of gods, professions, and months, while the third section included clones cuneiform texts and images, and finally a list of Arab and foreign references in this research.Eventually, I hope I have been Successful in doing my work

تاريخ مدينة الموصل في العصر العثماني والقبة لغة واصطلاحا وتطورا في العصور الاسلامية Domes of mosques in Mosul in the Ottoman Empire

اسم المؤلف: هادي محمد محمود الجبوري
اسم المشرف: فاروق محمد علي
الموضوع العام: علم الاثار
السنة: 2015
الموضوع الدقيق: الاثار الاسلامية
الدرجة: ماجستير
اللغة: العربية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: Characterized by the city of Mosul in abundance effects, particularly the mosques, the university, due to the limitations of time and neglect and sometimes sabotage, fear of exposure of these effects to change and the meridian, which hit some Amaúrha, which prompted me and motivated me to eat one of the elements Ammaria to those buildings, namely (domes of mosques in Mosul in the afternoon Ottoman) and signed optional on this topic for being one of the important topics which have not received a detailed and thorough study independently of researchers specialized in the fields of architecture and decorative arts, and the areas of Islamic monuments all, but came within other subjects, as was their archaeological no more than to be simple references to this element which Hadda_ of us as researchers Atharien_ to show the importance of this element in the mosques University of Mosul, as well as a lot of domes have been demolished, and the remaining gallery to collapse, so as not to make the necessary maintenance and limitations of time to build, so the study was based on field study is the basis and take pictures and measurements and have the necessary work drawings and geometric shapes of each dome to be a record of notarial objective basis to maintain the Islamic architectural heritage. The mosques university constructed in the city of Mosul during the Ottoman era adopted in planning all Chapel (winter), led by gallery (summer) and to the west of it a religious school attached to it, as it was natural conditions and climate side of the city a significant impact on the appearance of this planning in the city as well as the functional factors. Did not build mosques and domes implemented arbitrarily random but was calculated by scientific methods of engineering has been shown from the results of the engineering measurements that I have made to the houses of prayer and domes of mosques Osmania University in Mosul architecture put geometric size proportions chapel and size domes and high prayer houses and domes and Qatar dome and height. Characterized mosques university in the city of Mosul and the Dome of the existence of a single slab mediates the mihrab in the house of prayer and be centralized him, and half type spherical shaped top. Some mosques university in the city of Mosul 4_amtazat in Ottoman style of double installation domes, as in the dome of the fierceness of Qadu Masjid mosque with Alguetaúan, inner cover, external cover, among Alguetaúan vacuum widely, and knew this model in Iraq in the city of Mosul, only without the other, a The fourth example after Nouri mosque mosque. The presence of low domes above the portico Chapel in the mosque Aghas Central, including the mosque is the most important Faihan occupied zone transition from the square shape, which is a form of the porch to the circular shape which is a vaulted ceiling with a series of stalactites the wage, as well as above the right tile and left of the chapel roof top level. Hanaya corner triangles corner career took architecturally a key role in transforming the square bases to bases octagonal and then circular did not use the architectural purposes only, but exploited for use in decorative areas, as in the dome Khuzam Mosque mosque and Aghas and Alrabaah and Almhmoudin find a corner Hanaya, which culminated in contracts brushes have had functions as a decorative filled their bellies muqarnas.

النوافذ في عمارة الموصل في العصر العثماني The windows in a building in Mosul Ottoman period

اسم المؤلف: ياسر رشيد حمود العاني
اسم المشرف: فاروق محمد علي
الموضوع العام: علم الاثار
السنة: 2015
الموضوع الدقيق: الاثار الاسلامية
الدرجة: ماجستير
اللغة: العربية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: The emitters optional study - tagged (windows in Mosul architecture in the Ottoman period) came from in order to shed light on this prominent element is important in architecture which is hardly devoid of any building it, and take in all that it involves in terms of design, construction materials, and Hute of elements Marih, whether or decorative. As well as previous studies on buildings the city of Mosul in the Ottoman period did the uniqueness of the windows analytical scientific study include detailed terms and conditions of graphics and charts geometric disclose the types and forms and show their importance and characteristics aesthetic, in particular, has been limited vehemence it on limited aspects without depth detail. The study concluded that the results of which are as followsWe found that there is confusion between the window and the net by some researchers, the fact that the window is a hole in the wall of different shapes and types and sizes. The net is the one who fills that hole and load the hub of iron and wood Bderfh one or Derftin glass installer them.The study has shown the importance of the window as Amari prominent in the planning and building of any building of any size and function, Fastammelt to perform multiple functions, including climatic function, which is the most important has worked to provide the place that opened up the light and air. As well as a structural function, they are working to alleviate the weight hanging on the walls, and more, including architecture in transition zones and domes above the upper threshold of some entrances. As well as the aesthetic function envisaged by the architecture of the windows worked to beautify the external and internal interfaces of the building by breaking the monotony of endocrine walls. We found that the wall between the chapel summer and winter (the back wall of the house of prayer) annexation of most of the windows of the university compared to the walls of mosques and other Qibla wall of the Eastern and Western Almjunbtin.The study showed how keen the architecture to choose the right location to open the windows, indicating that the small number of open windows in the qibla wall so as not to distract worshipers in view of which abroad.We have characterized groves city of Mosul Bassahatha (yard wide) that take shape box or rectangle, has tried architecture that has the right kind of harmony between the arena open (yard) and the components of the building architectural units by directing the windows and doorways at the scene to allow light and air and to break the darkness of the blocks massive construction.The study proved the use Almzagl element in Pashtabaa Castle and took different forms, including slots and rectangular box, as characterized by narrow forms from the outside and from the inside of the vast increase monitoring and correction. This and found two of them, a simple design used for monitoring and throw darts Almzagl single, double and Almzagl it gives more room for movement and maneuver when defending, and the corners of monitoring where the broader monitoring of corners in single Almzagl. We found that there is diversity in the use of contracts that culminate in the windows and a circular half of the contract and the contract along with the pointed use Almenbtah rectum and Mufss decade

تخطيط وعمارة البيوت التراثية في كربلاء المقدسة : دراسة ميدانية Planning &architecture of The heritage houses in karbala

اسم المؤلف: وفاء كامل عبيد
اسم المشرف: زين العابدين موسى جعفر ال جعفر
الموضوع العام: علم الاثار
السنة: 2015
الموضوع الدقيق: الاثار الاسلامية
الدرجة: ماجستير
اللغة: العربية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: Karbala is one of the important religious cities in Iraq, they are created by the religious factor shrine shrines of Hussein and Abbas shrine (peace be upon them.(And Karbala, the current capital of an Islamic holy found with the martyrdom of Imam Hussein (peace be upon him) in the famous incident tuff and a group of his family and his companions in a granite Miami (٦١ e - ٦٨٠ m.( Karbala was the scene through the historical stages of developments affected the prosperity and growth of the urban, has attracted the attention of a number of travelers, historians and Orientalists who visited her and said part of the history and features distinctive Islamic. After : Considers Heritage Houses in the city of Karbala Center and Indian Justice (Touirij) and hand Hosseinieh treasure whatever they give us a historical picture of the art - Amari in terms of models Ammaria elements that he created architecture Karbalai (Iraqi) in designed, engineered and decorative walls and entrances and roofs They reflect our honest truth shows how interesting architecture Iraq at that time architecture.Hence the importance of these tagged study (Planning and Building Heritage Houses in the holy city of Karbala / field study) in order to maintain and develop those houses that began still randomly not only in Karbala and regions but swept all the governorates of Iraq due to the urbanization of random and non - planned forgetting the importance those houses and endured fragrant historical dating urban art that prevailed in different historical periods. The research aims to detailed study of the traditional houses in the holy city of Karbala and concisely about the history of the city and planning in order to establish objective background for the reader and the stages of urban development of the city through the ages that have passed them.The aim of this study is to rigorous scientific investigation and recording the smallest details about Heritage Houses in Karbala and aspects Ammaria and decorative and documenting these elements in a scientific manner so as to preserve them for being prone to ruin and destruction until precipitation and depreciation over time, as the inventory of heritage, documented, and the definition of its value process will be a major cause for the development of the city in the right direction by keeping the identity of the Islamic city and activate tourism and supporting the national economy of the individual and society.And the fact that the nature of the study field was asking us to make it a two - stage complement each other, the first theoretical work (academic) of a review of the sources, books and literature pertaining to the subject of our research, and the second is the field work, which requires several visits to facilitate the search, and return to my search terms did not address sources and references for archaeological and historical heritage houses Alkrplaúah, detailed and precise, where studies mainly focused on building shrines of Imams Hussein and Abbas (peace be upon them), while the buildings and houses we could not find a private study only some simple signals. The study was included four chapters new and serious attempt to shed a glimmer of light on the legacy of urban architecture heritage in that holy city its status and her judgment and her part, but abounded Heritage Houses and spread in Karbala and taking into consideration the cover study of Karbala So was chosen worthy models to study beginners city center as the largest unit Aderaah and took them four models, and then we moved to the administrative unit which is at least spend Touirij (India) has been selected four models also finally moved to Hosseinieh hand and studied the two houses of two houses as a model for the (rural areas).

فخار عصر العبيــد مـن موقع المسيحلــي : دراسة فنية اثارية

اسم المؤلف: نوري عبيد كاظم محمد
اسم المشرف: قصي صبحي عباس الجميلي
الموضوع العام: علم الاثار
السنة: 2014
الموضوع الدقيق: الاثار القديمة
الدرجة: ماجستير
اللغة: العربية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: Al - Massiehly Site is one of the areas located in the district of Shirqat in Salahuddin province, which witnessed charismatic human activity over the history. It also has its importance in Mesopotamia rich history of diverse civilizations and achievements in various fields. Such achievements had their impacts on other contemporary ancient civilizations which existed beside Mesopotamia successive triumph civilizations. One of the most important of such achievements was the invention of pottery, which had a significant impact on the agricultural life and its fruitful outcomes in Mesopotamia.The significance of the invention of pottery production lied in its great influence on social, economic, commercial, religious and artistic life due to the role it played in fulfilling a vital need for a material that is applicable to many essential areas from basic needs of household uses such as keeping liquids or cooking food, to storing some grains such as barley and wheat which have always been associated not only with village and farmers' life; but even with vibrant urban life close to the farming .From there emerged its economic and commercial significance after the emergence of important institutions such as the temple with its high profile position in terms of religious, economic and political importance, which had had a great influence on the hearts of the sons of Mesopotamia. Moreover, pottery pots had their significant impact on religious practices which, in turn, influenced the community customs and traditions as well as the after death rituals, as many of those pots were buried with the dead; in what is nowadays known as the "Funerary Gifts".Pottery was not totally devoted to domestic use as a means of storage or a bowl for drinking, but it also was a masterpiece which has communicated through the ages the message of civilization and the great diversity in areas of thought and artistic creativity, through what those pots carry of decorative methods variety, whether that was geometrical or natural decorations symbolized by geometrical or botanical shapes or by some abstract shapes of human and animal anthropomorphism. These arts are considered as messages which served us well in the know about of the life of ancient people of Mesopotamia, whether in social, economic or technical aspects.Pottery also forms an important link, if not the most important of all, for researchers, through which they could trace the chronology of the roles of civilizations incubated by this historical site, particularly those dating back to the prehistoric times, where a pottery fragment is considered to be the best guide to the habitats of history and the key to many question marks and exclamation points. The aim of studying this type of pottery, which dates back to prehistoric times, is to shed light on the status of this site and the amount and importance of what has been obtained from it of archaeological findings belonging to Al - Ubaid period, as the focus of the study will be such historic monuments from archaeological and technical/ artistic angle as well as the expansion this era had witnessed which included the entire of Mesopotamia and neighbouring countries. Pottery pots, in general, had such technical characteristics and artistic features which were unique to Al - Ubaid period, but were superficially addressed by many researchers while they are worthy better highlighting in a wider scope study, as they were found in several archaeological sites in and out of Mesopotamia, and many archaeological excavations have been dug out which date back to the Al - Ubaid period . Our study of the heritage of this Era has been based on archaeological excavations records as well as reviewing of local researches and studies published in the Journal of Sumer and Arabic studies including the Syrian Arab Archaeological Annual books, in addition to other important references including the study of professor Dr. Taqi Al - Dabbagh on old pottery, and on the foreign sources and references represented by foreign excavations reports at some sites in Mesopotamia, including excavations of the French mission at the site Al - Owaili, as well as the (Iraq) magazine which dealt with some specific aspects of this period . Such sources and references were an excellent guide and a reliable assistance in the opinion confirmation on the subject.In order to focus on one specific aspect of the many aspects of this study, and due to the multiplicity and diversity of the archaeological excavations findings in many sites in Mesopotamia and beyond, it must be stressed that the Al - Ubaid period is one of the important ages which had inherited from its predecessors and left us, the successors, a wealth of culture of impact both at home and abroad. Study the Pottery of this period has not attained a great deal of interest or extensive studying research, taking into consideration its term of time which stretched over nearly the period of (4500 - 3800 B. C), as well as the wide geographic spread it had witnessed in Mesopotamia and neighbouring countries, with the exception of the few studies which have been mostly in foreign languages. It has, therefore, been proven necessary to pursuit research and investigation in order to access those documents in obviously tough circumstances as the country, as a whole, and the research area (Sharqat), in particular, are witnessing serious security deterioration where we faced a lot of difficulties in achieving our aspirations, including scarcity of resources and the difficulty of obtaining missions excavation report. The objective of our study is to investigate the Al - Ubaid period pottery through what had been found at the archaeological site of Al - Massiehly, in addition to conducting a comparative study between the findings of Al - Ubaid period pottery found at the site of Al - Massiehly with similar findings found in other sites of Mesopotamia including industrial techniques analysis and the forms and methods of executing decorations on the hulls of those pots.Our study on this subject was not limited to the archaeological findings alone, but we also took samples of those models in order to conduct laboratory tests and analyses on them to identify their chemical components and the materials they contain, as well as those used in their colouring and decorations.....This study had included four chapters : hapter One : titled "The Geological Formation and Geographical Environment of the Al - Massiehly site"; and has included three sections : First section : Al - Massiehly, The location, the naming, Archaeological Excavations; Second section : The Geographical Environment of the Al - Massiehly site;Third section : The Region's Natural Resources. Chapter Two : titled "Al - Ubaid Pottery : The naming - Its Technology and Styles in light of published sources; this Chapter has included two sections : First section : Al - Ubaid Pottery : The naming - Its Technology;Second section : Styles of the Al - Ubaid Pottery;Chapter Three : titled "An applied comparative study of the Al - Ubaid Pottery from the Al - Massiehly site with other sites of Mesopotamia; and the Chapter has been divided into three sections : First section : Simple Pottery (The Technology, Shapes and the Usage) Second section : Coloured Pottery (The Technology, Shapes, Decorative Patterns and the Usage)Third section : Incised Pottery (The Technology, Shapes, Decorative Patterns and the Usage)Chapter Four : It was titled "Geographical Spread of Al - Ubaid Era Pottery in Light of Archaeological Excavations and Surveys"; and has included two sections : First section : The Geographical Spread of Al - Ubaid Era Pottery in Light of Archaeological Excavations and Surveys in Mesopotamia Second section : The Geographical Spread of Al - Ubaid Era Pottery in Light of Archaeological Excavations and Surveys outside of Mesopotamia Finally, it suffices me that I have been able to shed light on this important site from prehistoric times, namely Al - Massiehly site. Should I have been successful, that would be my ultimate wish, but if mistaken, though, it would be an error of an industrious attempt, as if there was any perfection; it would have to be the Almighty God's alone

نصوص اقتصادية غير منشورة من العصر السومري الحديث في المتحف العراقي Unpublished Economic Texts From New Sumerian Period In Iraqi Museum

اسم المؤلف: مهند عاشور شناوة القطبي
اسم المشرف: نوالة احمد محمود المتولي
الموضوع العام: علم الاثار
السنة: 2011
الموضوع الدقيق: الدراسات المسمارية
الدرجة: دكتوراه
اللغة: العربية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: The third dynast of Ur is considered to be the period of the last Sumerian political and military Renaissance. This dynast has imposed its political and military authority all over Mesopotamia as well as outside it towards the north and east. As far as other aspects, such as cultural and economical aspects, the Sumerian influence was so huge on this period of the third dynasty of Ur, the matter which represented the total sum of the Sumerian knowledge and cultural influence that dominated Mesopotamia and its neighboring countries during this period and the following periods as well. What is noteworthy is the fact that most of the texts resulted from this period are economical texts which have great importance to be studied so as to conclude the type of the economical system that was dominate that period concerning exchanged materials were used by the people of that time and which, weighs, measures, numbers, spaces were used and with what materials. Moreover, these texts have a considerable value in studying the personal names of that period mentioned in the texts to enable researchers to realize different populations and races that used to occupy this area and to see whether they were the native people of this country or they were no more than (foreigners). This type of knowledge would guide researchers to know to which city any personal names exactly belong through elaborate comparisons with other studies and researches that dealt with this subject. On the other hand, there is still another importance to economical texts which can be witnessed in studying the names of months that are typically related to agricultural activities in order to notice the differences in the arrangement of these months among multiple cities. Lastly, these texts and through the study of date formula will enrich the historical information related to the period of every king and the different incidents events in his own reign. Thus, this dissertation tackles fifty four economical confiscated texts that belong to different cities and gathered from certain collections found in the Iraqi Museum which I've faced great difficulty in reading some of them. Such difficulty is attributed to the smash or erasing of these sign out of direct contacts, the matter which greatly affected the clarity of the numbers printed on these texts. The study fall into five chapters the first chapter of the study represents the central chapter which contains the reading of texts, translating them and presenting the general contents of these texts along with their analysis. Chapter two consists of a study of the personal names mentioned in these texts in addition to an analysis it. With specifying the place to which each name written on the tablet belongs to compare it with names from other cities. Chapter three includes two sections. The first section is devoted to study the date formula, whereas section two is tackling the study of the month’s names due to their belonging in different cities. In addition to that, this section contains an arrangement of the months in a list which would help after all to identify each text to its belonging place. Chapter four also consists of two sections. The first section deals with the study of the names of cities and geographical sites mentioned in the named texts so as to identify the geographical map for these texts. Section two, on the other hand, includes the types of professions and manual works illustrated in these texts. Finally, the chapter includes a conclusion that sums up the major findings of the study. Chapter five contains lists and schedules of these texts, followed by copies of the cuneiform tablets, a bibliography of Arabic and foreign sources and an abstract in English.

نصوص مسمارية غير منشورة من العصر الاكدي Unpublished cuneiform Texts From Akkadian Period

اسم المؤلف: نشات علي عمران
اسم المشرف: باسمة جليل عبد
الموضوع العام: علم الاثار
السنة: 2016
الموضوع الدقيق: الدراسات المسمارية
الدرجة: دكتوراه
اللغة: العربية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: Akkadian period is among important period in Mesopotamia as it determines the end of an period and the beginning of a new one which is characterized with a central authority in which the power was in the hands of one king and an apparent change on the national, linguistic and political fields. All Sumerian cities in this period submitted to the Akkadian Empire administratively, politically and militarily. This period, also, was characterized with economic prosperity and cultural development. In the present study, we tried, by studying texts in questions besides other published texts, to extract information concerning the nature of economic and trade activities and the political issues of the Akkadian Empire. The study is cantion of three chapters divided into sections. Chapter one is a historical brief of the origin of Akkadians and the migration. This chapter also includes two sections, the first deals with cultural history of Akkadians and the second deals with their religious life. Chapter two includes two sections; section one discusses the political history of the Akkadian Empire, whereas section two studies its economic activities. Chapter three is a study of the cuneiform texts and their analysis. It includes two sections; the first of which studies the contents of these texts, the second studies cuneiform texts, their translations and analyses. The study, also, includes pictures and hand copies of maps and indexes included Sumerian words and their equivalents in both Akkadian and Arabic languages. It also includes tables of the figures, gods and cities proper nouns.

تاثير اضافة الكالسيوم على البنية المجهرية والخواص الميكانيكية لسبيكة Al - Cu - Mg Effect of Ca Addition On The Microstructure And Mechanical Properties of Al - Cu - Mg Alloys

اسم المؤلف: نور صباح توفيق
اسم المشرف: منذر محمد راضي
السنة: 2014
الموضوع الدقيق: هندسة المعادن
الدرجة: ماجستير
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: في هذه الرسالة تم دراسة تاثير اضافة عنصر الكالسيوم بنسب مختلفة ) 3.0 المجهرية والخواص الميكانيكية لسبيكة) المنيوم - نحاس - مغنيسيوم ( , حيث تم انتاج هذه السبائك باستخدام والتي تتضمن )المعاملة المحلولية, )? السباكة الرملية وعوملت حراريا باستخدام المعاملة ا | In this thesis ,the effect of pure Ca element addition in different percents of (0.3,0.6,0.9%) on the mechanical properties of Al - Cu - Mg alloy were studied.The Alloys were produced using sand casting and heat treated using T6 which involve [solution treatment , quenching , artificial aging ], aging process were carried out at 220? C for different periods of time ranging between (5min to5hr).Also the work involves a study on the effect of Ca addition on both grain size as well as the resulting phases before and after heat treatment, samples were examined using optical microscope, Scanning Electron microscope ,X - Ray diffractometer and image - J to estimate the average grain size.The results of hardness and tensile tests for 0.6% Ca and 4hr aging shows the best response as compared to the other alloys. The hardness and strength values have been changed from (78.29HV)(110.57Mpa) during (30min)at 220?C for non - Ca content alloy to(125.9HV)(164.2Mpa) for 0.6%Ca alloy. X - Ray diffraction , results shows the basic phase that forms is Al2CuMg (S??, S? phase) which is considered as the main strengthening phase in AL alloys, and it was found that Ca addition leads to form (Al4Ca) and (Al2Ca)which delay the alloy response to precipitation hardening by delaying the formation of (S)phase. SEM images showed a large and small dimple structure and broken or cracked Al - Ca compounds particles.This indicates that the fracture was ductile fracture in the Al matrix and brittle in these compounds ,.Also presence of microvoids (porosity) on the fracture surface is formed at the interfaces between Ca compounds and Al matrix enhanced the crack propagation through their center. The presence of the secondary phases precipitates (Al2CuMg ,Al2Ca and Al4Ca) in the fracture surface also contributed to ameliorate the mechanical properties by increasing the bonding of the matrix and reduced the ductility.Also Ca addition in the range of (0.3 - 0.6%) gives rise to grains refining ,While increasing Ca content up 0.9%wt coarsing the grains, which leads to decrease the hardness and tensile strength, From these results the decrease in tensile strength with increasing Ca content over 0.9% seems to be attributed to the reduction in elongation caused by the occurrence of micro porosity due to Ca addition.

تخطيط مسار نقطي خال من الاصطدام لروبوت ممفصل ذا خمس درجات حرية Point - To - Point Free Collision Path Planning of 5 DOF Articulated Robot

اسم المؤلف: محمد عبد الرحمن غفور
اسم المشرف: تحسين فاضل عباس
السنة: 2014
الموضوع الدقيق: هندسة الانتاج
الدرجة: ماجستير
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: ان الهدف الرئيسي من هذا البحث هو ايجاد مسار لمفاصل الروبوت وللماسك النهائي في الروبوت خلال حركة الماسك من نقطة البداية الى نقطة الهدف المراد الوصول اليها خلال حيز مؤتمت بدون الاصطدام مع العوائق الموجودة في بيئة الروبوت اعتمادا على الحل العلوي لاذرع الروب | The main objective of this research is to find a path for the robot joints and gripper from the given start point to the desired goal point without collision with the obstacles which exist in the robot environment depending on the robot links upper solution. This research will investigate the problem of path planning for a 5 axis articulated robot, operating in an environment with obstacles whose boundaries are enveloped by a spherical shape. The path planning approach has been developed in the robot joint space and consists of five phases : The first phase is using Bezier, Hermit, B - spline and NURBS curve techniques considering their control points weight not constant. The second phase is to generate a sufficient number of intermediate points in Cartesian space along those curves. The third phase converts the coordinate of the generated intermediate points from its Cartesian space into joint space and move the robot gripper along the generated path. The fourth phase screens the generated four Bezier, Hermite, B - Spline and NURBS paths in order to choose the best one. The fifth phase is developing the chosen path by using proposed algorithm to improve the selected path.Both forward and inverse kinematics solutions for the robot links using Denavite - Hartenberg representation are important step to determine the manipulator's joint angles and Cartesian coordinates, that assists generating the required path which has been derived in this work.Matlab program has been used as an assistant program to analyze, sketch and implement the algorithms of forward kinematics, inverse kinematics and path planning.This work will not be limited to theoretical studies or simulations, experiments have been run with various tests, on "educational robot" Lab - Volt R5150 to assess which path is the better ability in avoiding the obstacles. The method applies to robots in a fixed and known environment. A number of experiments have been carried out to test the ability of the robot arm to reach its goal without collision It’s found that Bezier curve was the chosen path because it was the better obstacle avoidance and shorter path.

دراسة المفاهيم التقليدية والحديثة في نظرية ادارة المشروع Conventional & Modern Study Theory of Project Management

اسم المؤلف: علي كريم عطية
اسم المشرف: مازن بكر عادل
السنة: 2007
الموضوع الدقيق: الهندسة الصناعية
الدرجة: ماجستير
اللغة: العربية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: تعد ادارة المشروع الاسلوب الاكثر كفاءة لتنفيذ وانجاز المشاريع وتطبق في كافة مراحل دورة حياة المشروع والمتخصص في هذا المجال هو في امس الحاجة الى وجود اساس نظري واضح المعالم كي يستطيع من خلاله ايجاد واستخدام الادوات المناسبة والتقنيات ذات الكفاءة العالية في | The Project Management is applying the knowledge and the skills and newly techniques on project activities in order to get or to achieve the investments requirement and the benefits from the project, and it is consider as the style which is the most efficient to execute and to achieve the project and apply in all life cycle of the project and the techniques person in this field, he is need to person of clear practical fundamental in order to he is able by through it to find and using the suitable tools and techniques with high efficiency in achievement the duties that it is order to do it so start the searching to explain the head lines of contents of the project management theory according to the conventional looking to it, and it was been found since appearance the since and program of the project management at the ends of 6th century from the last century and till the last of 1990, and the research try to returning the practical fundamental making to management project and construct it is constitutions with new style by help of system of last diagram, that my be it can control the whole project management and exactly the planning phase that considers as a center of project management. And take place a large development and extensive jumping and appear new experiences or new techniques in most scientific fields, also there is a big progressive in computer and the softwarethat used in it and can get benefits from these by renew the ways of project management and with the beginning of 21 century, a purer new philosophies depends on thestyle which look after the lean thinking in using the least from every thing to obtained the best in a quality specification and excellent quality, and the researcher start to sign to the new scientific understanding which has a strong connection with the management of the project.He is concentrated on the management foundation for project management in new looking depend on principle and foundations of new philosophy in thinking which are the thinking to reach the newly looking can be called LEAN PROJECT MANAGEMENT after that he do the study to tow situation of water resources projects that applied in it to a check the works in right scientific way and excellent style, and between history of project management in Iraq that lead to effect on the project in few proportion and it is influence in different side of quality and time and cost and provide many attention through it can renew the project management and get benefit from the scientific development to get the best result when management and achieve the execution of the project.

دراسة سلوك البلى الترددي لمواد مركبة ذات اساس من سبيكة المنيوم / sic تحت ظروف الانزلاق الجاف والرطب A Study On The Reciprocating Wear Behavior of Aluminum Alloy / SiC Composites Under Dry And Wet Conditions

اسم المؤلف: عتبة حسين علوان
اسم المشرف: احمد علي اكبر اكبر
السنة: 2014
الموضوع الدقيق: هندسة المعادن
الدرجة: ماجستير
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: تم في هذا البحث دراسة معدل البلى لاحدى سبائك الالمنيوم ((AA2024) (Al - Cu - Mg ومواد مركبة عن طريق تصنيع جهاز بلى ترددي تبعا للمقياس العالمي ( ASTM G133) ذو ترتيبة المسمار على المستوى (Pin on Flat) لمتغيرات مختلفة (الحمل المسلط , النسبة الوزنيه لدقائق كا | In this work the wear rate of one of aluminum alloys (Al - Cu - Mg) (AA 2024) and composite materials, has been studied by manufacturing a reciprocating wear device according to the International Standard (ASTM G 133 Pin on Flat) for different variables (applied load, weight percentage of (SiC) and sliding speed) under dry and wet (lubrication) conditions. Stir casting method has been used to prepare a composite material by using vortex technique to force the particles inside the molten metal (Al - alloy) and to distribute them regularly. The composite materials reinforced with different weight percentages of SiC (3, 6, 9, 12 wt%) are used. The base alloy and composite materials samples were tested to investigate the microstructure, and phases using optical microscope and Vickers hardness, wear rate, and the worn surfaces by using scanning electron microscope (SEM). From the results of microscopic examination it is found that the microstructure of alloy matrix was fine dendrites, in addition to the SiC particles that distributed near homogenously in the alloy matrix. The hardness test results showed that, the increasing of the weight percentage of (SiC) leads to increase the hardness, and the highest value of hardness was found at 12wt% SiC. Also the results showed that the wear rate increases with applied load for all weight percentage of reinforced particles (SiC).With increasing the load, more wear tracks, deep, and closed paths are formed and severe wear happens under dry condition but the lubrication case has less effect than dry case.It was shown that wear rate of both base alloy and composites under various conditions, increases with increasing of applied load and sliding speed but the wear rate decreases with increasing the SiC wt% in composite.Statistical method using software (Minitab 16) was used to study the effect of wear rate for both the base alloy and composite material by using three variables; applied load (X1), silicon carbide proportion (X2), sliding speed (X3), with five levels of each variable. It is concluded that the optimum weight loss under dry case was 0.0014g, The combined effect of variables and the wear rate was obtained and which variable are more influential, as shown in the equation below : D = 0.056703 - 0.002164 X2 - 0.000282 X3+ 0.000017 X1 X3 +0.000010X2 X3 While under lubrication case that the optimum weight loss was 0.0037g and the combined effect of variables and the wear rate was obtained and which variable are more influential, as shown in the equation below : L= 0.009607 + 0.002825 X1 - 0.002375 X2 + 0.001100 X3 + 0.001664 X3 2 + 0.004700 X1 X3 + 0.002700 X2 X3 The applied load (X1) and sliding speed (X3) have the largest effect on wear rate.

السحب العميق المتعدد المراحل للاقداح السداسية Multistage Deep Drawing of Hexagonal Cups

اسم المؤلف: صبيح سلمان داود
اسم المشرف: وليد خالد جواد
السنة: 2014
الموضوع الدقيق: هندسة الانتاج
الدرجة: دكتوراه
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: The aim of this work is to design and manufacturing a multistage (three stages) deep drawing dies to produce cylindrical and hexagonal cups of (43,33.1,26.8)mm diagonal diameter through two methods. The first method by drawing the hexagonal cups directly by using hexagonal orifice die from a flat sheet (blank) of (80mm) diameter and (0.7) mm sheet thickness for (1006 - AISI) hot rolling low carbon steel material.The second method by redrawing a cylindrical cups of (43,33.1,26.8) mm outer diameter (produced previously by a cylindrical orifice die) in to hexagonal orifice die which transform (convert) these cylindrical cups into hexagonal cups of (43,33.1,26.8)mm diagonal diameter.For all stages of drawing hexagonal cups, wall corner radius of die (0.7, 4)mm, with punch and die profile radius of (4 and 8) mm and drawing speed of (50, 200, 500) mm/min were used to study the effect of these parameter on drawing forces, cup wall thickness, strain distribution over the cup wall and surface defect of the cup wall.A commercially finite element soft ware (ANSYS 11.0)was used to perform the numerical simulation for cylindrical and hexagonal cups in three stages of drawing process. A comparison between theoretical (simulation) and experimental results lie within average of (15 - 20%), and the agreement is good in the first stage.The results shown that excessive metal flow ,maximum thinning of cup wall and maximum strain occurred at corner radius of (0.7) mm and at drawing speed of (500mm/min )for hexagonal cup produced directly from flat sheet.The results shown that the best thickness distribution and strain distribution over the cup wall, better cup wall surface (less surface defects) and lowest drawing force was with percentage (63.8%,45.4%,74.1%) respectively occurred when transform (converting) the cylindrical cup into hexagonal cup with wall corner radius of die (Rc= 4)mm in three stages.

دراسة زاوية تعشق العدة في عمليات التفريز Studying Tool Engagement Angle In Milling Process

اسم المؤلف: ليث فاضل شاكر
اسم المشرف: ليث عبد الله محمد
السنة: 2014
الموضوع الدقيق: هندسة الانتاج
الدرجة: ماجستير
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: هذه الاطروحة تعنى بدراسة تاثير زاوية تعشيق العدة بالمشغولة على ستراتيجيات ونتائج عمليات التفريز بالعدد ذات النهايات المسطحة. تم تصميم نموذجين (CAD model) باستخدام برنامج (Solid work 2013) الاول على شكل كونتور خارجي والاخر على شكل بوكيت داخلي وبعد ذلك تم | This work focuses on the effect of controlling tool engagement angle (TEA) on the milling process planning and the results of end milling operations. Two CAD models has been designed by using Solid Work 2013 software, then G - code have been generated and simulated by using Surfcam V5 software with (Fanuc post processing). AL7075 - T6 alloy has been used for its high machinability, dry machining (no coolant) has been done on 3 - axes milling machine (C - tek) available in the University of Technology Training and Workshop Center.Feeds, speeds and other machining parameters (axial and redial depth of cut) have been selected according to machining handbooks recommendations. Machining of workpieces has been accomplished by using two techniques (two types of tool - path), first one was conventional tool - path machining (contour parallel tool - path), and the second was by using TRUEMILL technique (true engagement controlled tool - path) by Surfcam V5. Thirty experiment have been designed, four of them have been failed, ten have been accomplished and the others neglected for reasonable causes as it will be discussed. Finally a comparison between the two techniques has been made focusing on machining time, material removal rate, cutting temperature and surface roughness. The results confirm that TEA control leads to reduce machining time, we have a time reduction in about (80%) for contour machining and (57%) for pocket machining. Cutting heat was under control though the feeds and the axial depths of cut went higher, also by controlling tool engagement angle we skipped the cause of failure of some experiment in conventional tool - path machining. Surface roughness was not that affected by controlling tool engagement angle, the minimum surface roughness in hand is (0.43 µm), it is higher than the best result of a previous work for the same material by 50%.

دراسة تجريبية حول مسحوق حبيبات النحاس ذات الحجم النانوي باستخدام الترسيب الكهربائي المصحوب بالامواج الفوق صوتية Experimental Study of Nanosized Copper Powder Using Sonoelectrodeposition Process

اسم المؤلف: حيدر ياسر ثامر الياسري
اسم المشرف: محمد جاسم كاظم عدنان شمخي جبر
السنة: 2014
الموضوع الدقيق: هندسة المعادن
الدرجة: ماجستير
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: عملية الترسيب او التحليل الكھربائي تعتبر من الطرق التصنيعية الرئيسية التي تستخدم لانتاج مختلف الاشكال والاحجام (ضمن المدى الميكروي) من حبيبات مسحوق معدن النحاس والتي تستخدم لاحقا بواسطة تكنولوجيا المساحيق لانتاج اجزاء محددة. ايضا استخدمت ھذه الطريقة بمد | Electrolytic or electrodeposition process is considered a main way to produce many shapes and sizes (micro range) of copper powder to be used in powder metallurgy process. It is used broadly to deposit copper coatings with nanosized grains, but it is rarely used to produce nanosized particles of copper. Reaching this goal is highly dependent on the optimum design of the parameters of electrodeposition process.This work aims to study the important variables that most affect the electrodeposition process outputs. These variables are : copper sulphate pentahydrate salt concentration CuSO4.5H2O (1, 5.5, and 10) g/l, cathodic current density (12.5, 25 , and 37.5) mA/cm2, ultrasonic (20 KHz frequency) vibration amplitude (5%, 20%, and 35%) from the maximum amplitude (1 ?m), and amount of sulphuric acid H2SO4 (H2SO4 concentration > 97%) in electrodeposition cell (0.05, 0.10, and 0.15) ml/l. The study of effects of these variables is concerned with size of resultant powder particles, also their effect on the purity, morphology, and shapes of particles is studied, and the crystallinity of particles is also covered.The design of experiment (DOE) approach is applied here through Taguchi design of experiments, to manage and analyze the results and study the specific effects of each. The arrangement of variables’ levels is done using the setup of (Taguchi L9).The analysis of experiment tests of the study of electrodeposition process to get copper nanoparticles showed that all variables have effect on the size of resultant copper particles, but in different ways and degrees. The mean particle size of all samples is about 86 nm. It was found that the increasing of concentration of copper sulphate salt (1, 5.5, and 10) g/l had a negative on the increasing the size of copper particles in the range (71, 69, and 117) nm.While the increasing of cathodic current density (12.5, 25 , and 37.5) mA/cm2 had an effect of decreasing the particle size of copper in the range (114, 75, and 68) nm. The case was the same for increasing of amplitude of ultrasonic vibration, where increasing it (5%, 20%, and 35%) caused decreasing in the particle size in the range (97, 92, and 68) nm. And the effect of acid amount (0.05, 0.10, and 0.15) ml/l was multiple because it decreased the particle size first and increased it later in the range (90, 65, and 102) nm. The amount of effect of each variable on the process was calculated using specific equations of Taguchi design. It was found that the current density has the bigger effect (35%) on the resultant particle size (it minimized the size). The salt copper concentration has the second effect (34%) (it maximized the size), and thirdly the acid concentration effect is 19% (it had multiple effect on the size).Finally the ultrasonic vibration has 12% effect (it minimized the size). The optimum values of process parameters that lead to minimum size of the particles were : CuSO4.5H2O concentration = 5.5 g/l, Current density = 37.5 mA/cm2, Ultrasonic amplitude = 35%, H2SO4 concentration = 0.1 ml/l.The SEM photographs were used to examine the morphology of particles. The results show that the shape and morphology widely vary between many modes : from treelike through irregular, angular, or rounded shapes to a wellfaceted truncated octahedron. The forming of well - faceted truncated octahedron copper particles is related strongly to the presence of ultrasonic vibration which plays the role of inhibitor.Energy dispersive spectroscopy (EDS) elemental analysis of copper nanoparticles indicates the high purity of most of samples except the cases where there are traces of oxygen from very thin layer of oxides and/or carbon from residual alcohol.The x - ray diffraction studies reveal that the resulting particles are a crystalline copper element with a face center cubic (FCC) crystal structure.

تطبيق نظام دعم القرار لانشطة الصيانة في مصفى الدورة Application of A Decision Support System For Maintenance Activities In Al - Daura Oil Refinery

اسم المؤلف: مصطفى محمد علي منصور
اسم المشرف: لمياء محمد داود لمى عدنان حميد
السنة: 2014
الموضوع الدقيق: الهندسة الصناعية
الدرجة: ماجستير
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: في ھذا البحث تم دراسة انشطة الصيانة في معمل دھون 3 احد معامل الدھون في مصفى الدورة حيث تم اختيار ھذا المعمل كونھ الاحدث والاكثر انتاجية مقارنة مع المعملين الاخرين وتم اخذ بيانات انشطة الصيانة لمدة عشر اشھر متتاليھ من ايار 2012 ولغاية شباط 2013 علما ان وح | In this research maintenance activities in lube oil factory (3) of Daura refineries is investigated for ten consecutive months from May (2012) to February (2013).This factory is the newest and largest in its capacity compared with lube oil factory (1 and 2). Dewaxing unit produces the greater products compared with other production units in lube oil factory (3). The frequency of breakdowns and type of maintenance were identified, Pareto chart are used to analyze the collected data. Results indicated that %95 of breakdowns of different equipments (pumps, exchangers, compressors, docks, filters, furnaces and towers) are due to mechanical causes, the rest are related to electrical causes.Pareto chart highlights that the most frequent failure for both pumps and exchangers followed by compressors and other equipments of lube oil factory 3.Loss production cost due to maintenance activities was also conducted in this study so as to analyze different aspects of maintenance activities for lube oil factory (3).The total loss in production due to breakdown in the ten months of this study is (99 Billion ID). It is worth’s mentioning that pumps registered the highest losses of production cost due to bad maintenance. Accordingly, decision making for maintenance activities is a multiattribute and decision support system is crucial to signify priorities and definealternatives. ERGO (Latin word meaning "therefore" or Greek word meaning "work", used as a prefix ergo - , for example, in ergonomics and it is generalpurpose decision support system using 35 criterion to choose the best alternatives) is employed so as to evaluate detailed scope and the best of best alternatives. ERGO results indicated that Pumps are the best alternative offered to decision maker to conduct the necessary maintenance ERGO identifies the equipment with the most frequent breakdown indewaxing unit, which causes the greater loss in production cost. Compressors were identified as the highest frequency failure equipment(s). Combining two criteria (frequency of failure and lost production cost) reveals that pumps are the best alternative.

تقليل ضياعات القص في مشكلة قطع الخامات احادية البعد باستخدام نموذج برنامج جاهز Trim Loss Minimization In One - Dimensional Cutting Stock Problem Using A Ready Software Model

اسم المؤلف: سلام قدوري داود
اسم المشرف: سوسن صبيح الزبيدي
السنة: 2014
الموضوع الدقيق: الهندسة الصناعية
الدرجة: ماجستير
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: تعتبر مشكلة قص الخامات واحدة من المشاكـل العملية المهمـة، لذا ركز البحث على دراسة مشكلة قص الخامات احادية البعد بالتفصيل، حيث تم دراسة تصنيف وخصائص وطرق حل هذا النوع من المشاكل بالاضافـة الى اقتراح اسلـوب حـل مناسب لتقليل ضياعات القص الحاصلـة في بيئـة ا | Cutting stock problem is one of the important operation problems. The one dimensional cutting stock problem is considered as obvious problem which should be centered to be solved, so this thesis focuses on studying classification, characteristics and solution methods for this problem, in addition to suggest suitable approach for minimization of the trim losses in actual environment, as it is required to fulfill all of the small required items with different lengths and quantities by cutting the identical large objects which are available as stock. The variety of lengths and quantities of these small required items makes the problem obvious in complexity to fulfill all items with minimization of Integer Linear Programing (ILP) which is aided by Advanced Interactive Multidimensional Modeling System (AIMMS) software used to solve research problems. This software used because that getting of accurate details and speed results for waste amounts, number of used stocks, total and efficient cutting patterns that are generated to getoptimal solutions.Our study has been applied in an actual environment (housing project with 41 building units in Azezeiyah - Wasset) being carried out by Al - Mansour Company of Iraq Ministry of Construction and Housing, where the reinforcement steel (Rebar) with standard length is considered as a backbone component of building structure.These problems have been studied according to different rebar diameter (25 mm, 16 mm, 12 mm, and 10 mm), where each problem is subdivided and solved according to basic building activity designs (foundation, columns, beams, slabs, stairs, balcony, and front arch building entrance), trim losses which were resulting from certain activity design - diameter problem that have lengths longer than required item lengths in the next activity designs are stored and utilized to get optimal stock ratios. The utilization stock ratio which is resulting of suggested solution approach (ILP) for all these one dimensional cutting stock problems has reached (98.53%), while the utilization of used stock in that actual environment got by Al - Mansour Company is lower than this percentage.

تاثير المعاملة بالليزر على مقاومة التاكل للفولاذ المقاوم للصدا نوع 304 Effect of Laser Treatment On Corrosion Resistance of 304 Stainless Steel

اسم المؤلف: زمن عبد الرزاق عبد الوهاب
اسم المشرف: محمد جاسم كاظم سامي ابراهيم جعفر
السنة: 2014
الموضوع الدقيق: هندسة المعادن
الدرجة: ماجستير
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: تعتبر هذه الدراسة بانها محاولة لتحسين مقاومة التاكل للصلب المقاوم للصدا من نوع 304 عن طريق الانصهار السطحى بالليزر. تم استخدام تقنية منحني تافل لتحديد معدلات تاكل الصلب المقاوم للصدا نوع 304 في محلول 3.5? كلوريد الصوديوم عند اربعة حالات مختلفة. الاولى بدو | The present work represents an attempt to improve corrosion resistance of sensitized 304 stainless steel by laser surface melting treatment. Tafel extrapolation technique was used to determine the corrosion rates of stainless steel type 304 in 3.5% NaCl in four conditions. The first condition is as received, the second sensitized microstructures at temperatures 850 oC for one hour, the third condition is treating the stainless steel alloy by laser surface melting (LSM) without sensitization. The fourth condition is studying the effect of LSM on sensitized stainless steel.The main results obtained are expressed in terms of corrosion parameters through electrochemical behavior : E°, I°, E Corr., ICorr., EP., IP, EPit. and IPit.These parameters are strongly dependent on the microstructures of the alloy. The results reveal when the potentials increase, this means that the microstructure becomes thermodynamically more stable and has good corrosion resistance. The above electrochemical parameters for sensitized 304 stainless steel show that localized corrosion rate increases due to precipitation of chromium carbides on grain boundaries and to the sensitization process affecting the phases. The LSM treatment shifts the potential toward noble direction, the corrosion current densities values shift to lower values. Generally, a change in surface hardness shows a microstructure modification in metallic bonds. The comparison of anodic polarization curves indicates that the corrosion rates for laser treated specimens are reduced. Increase in corrosion resistance probably means that most inclusions at the surface have been dissolved in the structure due to melting or alternatively, they are covered by molten materials. An interesting feature is the systematic shift of the pitting potential in the noble region with a laser treatment. This result confirms that the laser treatment can be used successfully to improve the localized corrosion resistance.

دراسة الخواص الترايبولوجية لمادة متراكبة ذات اساس نحاس A Study of Tribological Properties of Copper Matrix Composite Material

اسم المؤلف: مريم عبد العظيم باقر
اسم المشرف: اسراء عبد القادر عزيز
السنة: 2008
الموضوع الدقيق: هندسة المعادن
الدرجة: ماجستير
اللغة: العربية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: يهدف البحث الى دراسة مقاومة البلى والاحتكاك للمادة المتراكبة ذات اساس نحاس من نوع ? - براص (Cu - 29.5%Zn) والمقواة بدقائق من كاربيد السليكون مرة ودقائق من الكرافيت مرة اخرى. وكانت نسب الاضافة wt%(5، 10، 15) لكل منهما. لقد تم تصنيع هذه المواد المتراكب | This research is devoted to study the wear resistance and coefficient of friction of copper matrix composite type - brass (Cu - 29.5%Zn) which reinforced with silicon carbide particles in one state and graphite particles in another and the addition percent was (5,10,15) % for each. Preparation of composite materials carried out by stir casting using vortex technique.A study of adhesive wear resistance was carried out by using the pin - on - disk technique for the base alloy and composites materials in different conditions by measuring the coefficient of friction and wear rate as well as the effect of each factor from applied load and sliding speed and type of composites.Three loads (5,10,15) N were used at constant sliding speed 3.7 m/sec. as well as three speeds (2.7 , 3.7 , 4.7) m/sec were used with constant applied load at 10 N.The results showed that the wear rate is increase in general with increasing the applied load , but the composite material reinforced with graphite particles showed wear rate lower than that of the base alloy and the composite material reinforced with silicon carbide particles. While, when different sliding speeds were used , the results showed that the wear rate is decrease with increasing sliding speed. It is clear that the composite material reinforced with graphite particle has small wear rate and coefficient of friction as compared with base alloy and composite material reinforced with silicon carbide. It is clear from coefficient of friction that it is increase with increasing the time until the It is clear from measuring the change in surface temperature for each one of materials the base alloy and composites materials under the effect of different loads (5, 10 , 15) N and at constant sliding speed 3.7 m/sec , rising in temperature is noted with increase the value of applied load and the composite material reinforced with graphite particles showed remarkable decreasing in temperature as compared with base alloy and composite material reinforced with silicon carbide.

دراسة تاثير سرعة الدوران ودرجة الصب على توزيع السليكون في سبيكة Al - 23% Si بسباكة الطرد المركزي Study The Effect of Rotation Speed And Pouring Temperature On The Distribution of Si In The (Al - 23% Si) Alloy Produced By Centrifugal Casting

اسم المؤلف: عبد الجبار سعد جمعة
اسم المشرف: نوال عزت عبد اللطيف رابحة صالح ياسين
السنة: 2012
الموضوع الدقيق: هندسة المعادن
الدرجة: ماجستير
اللغة: العربية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: يهدف البحث الى تحضير مادة متدرجة وظيفيا" ( FGM ) باستعمال طريقة السباكة بالطرد المركزي ودراسة تاثير متغيرات العملية على البنية المجهرية لسبيكة المنيوم - سيليكون فوق اليوتكتك (Al - 23%Si ). تمت دراسة تاثير كل من سرعة دوران قالب السباكة ودرجة حرارة الصب ( ا | The aim of this study was to prepare a functionally graded material by using centrifugal casting method and study effect of parameters process on the microstructure of a hypereutectic ( Al - 23%Si) alloy. Effect the rotation speed of mold casting and overheating temperature on the microstructure and hardness of ahypereutectic ( Al - 23%Si) alloy were investigated. Therefore, the melt was overheated to( 800,900) C? and poured in the centrifugal casting mold after preheating by used gaseous torch to (100) C?. Then we obtained on cylinders at different rotation speed (765,840,1043,1712,1878) r.p.m. Optical microscopy and scanning electron microscopy used to study the microstructure to produce samples. The results showed that the overheating temperature and mold rotation speed affect on the grain size and volume fraction of ( ? - Si) phase, increasing of the overheating temperature due to increasing average volume fraction and decreased the grain size of primary silicon, but increasing mold rotation speed due to increasing the average volume fraction in the inner layer from cylinder thickness and decreased in the intermediate and outer layer , also decreased the grain size of primary silicon. The maximize volume fraction was in the inner layer from a cylinder thickness obtained at rotation speed (1878) r.p.m. and poring temperature (900)C? , where the values of volume fraction of ( ? - Si) phase are (35%) and obtained on completely functionally graded material. The results of micro structural observations showed that centrifugal casting process contributed to change the eutectic phase morphology from coarse needle - like structure to fibrous structure at increasing mold rotation speed but increased pouring temperature due to invert, and the results showed found thickness of (Si) particles in the metallic matrix decreased with increased rotation speed. The results of hardness tests to a cylinders samples showed maximum hardness values in the inner layer from cylinder thickness and increased with increasing mold rotation speed but it is decrease with increasing rotation speed. values hardness in all layers decrease with increasing pouring temperature. The results of wear tests showed maximum wear resistant was in the inner layer from cylinder thickness at rotation speed (1878) r.p.m. and poring temperature (800)C? and then coming outer layer but minimum wear resistant was in the intermediate layer.

المعاملة السطحية بالليزر لحديد الزهر الرمادي باستخدام ليزر (Nd : YAG - Nano Second) Laser Surface Heat Treatment For Gray Cast Iron Using Nano Second Nd : YAG Laser

اسم المؤلف: بلال احمد حبيب
اسم المشرف: رابحة صالح ياسين هجران زين العابدين طعمة
السنة: 2014
الموضوع الدقيق: هندسة المعادن
الدرجة: ماجستير
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: في هذا البحث، تم استخدام تاثير معلمات الليزر لتحسين الخواص السطحية للحديد الزهر الرمادي، وذلك باستخدام جهاز Nd : YAG ليزر بطول موجي nm(1064 (، البعد البؤري cm( 5 ,10,18)، وامد النبظة ns (10). استخدمت طريقة الانصهار السطحي بالليزر في تصليد العينات، الى | In this thesis , the effect of laser parameters is used for perfection of the surface characteristics for gray cast iron , using pulsed Nd : YAG laser with wavelength of (1064nm ).The laser surface glazing and shocking methods have been used in hardening the specimens , besides using the laser energy in treatment of (1.2 J) , pulse duration (10 ns), with different focal length of (5,10,18) cm and used the (air ,water , DMSO) as a active medium. In laser surface engineering the micro hardness, roughness and wear rate examinations deliberated before and after laser treatment. The effect of laser parameters includes : The effect of the pulse repetition rate (P.R.R) , the result shows , thevalue of the micro hardness of work pieces reduced but the variation in the value hardness decreased. For the effect of the medium used (air, water, DMSO) it was found with increasing the water and DMSO high the value of the micro hardness of work piece increased and value of the (loss of weight , wear rate, surface roughness ) reduced. After treatment by laser the amount of loss in weight is less than the loss of weight with the base metal (before the treatment) , so the results reveal an improvement in wear rate after treatment by laser. And for the effect of overlapping technique ,it was found that the best percentage for overlapping technique ratio is 50% for the selected laser energy. The value of micro hardness increased by moving away from the center of the laser strike on the work piece.

تاثير اضافة عنصر النيكل الى سبيكة Al - 4% Cu - 1.5% Mg The Effect of Ni Addition To Al - 4 % Cu - 1.5% Mg Alloy

اسم المؤلف: اسيل احمد اموري
اسم المشرف: منذر محمد راضي
السنة: 2008
الموضوع الدقيق: هندسة المعادن
الدرجة: ماجستير
اللغة: العربية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: في هذا البحث تم دراسة تاثير اضافة عنصر النيكل النقي وبنسب مختلفة (wt % 5 - 3 - 2 - 1) الى منصهر سبيكة المنيوم - نحاس - مغنيسيوم وتمت سباكتها بوساطة السباكة بالقوالب المعدنية ومن ثم اجراء المعاملة الحرارية التي شملت (عملية التجانس الحراري على السبائك بعدها | The studying effect of adding pure nickel element in different percentages to (Aluminum - 4%Copper - 1.5%Magnesium) during alloy molten state by die casting procedure, and then make the heat treatment that includes : (the thermal homogenizing followed by heat treatment (T6) which includes solution treatment followed by artificial aging at 220 C? at different times within the range (30 min. - 5 hr.)). Also had been studied the effect of pure nickel element on microstructure and on grain size and the types of phase that created in alloys produced by founding by using optical microscope , x - ray diffraction test device and a program that calculates the volume fraction of particles (J - image). So when we tested the hardness, the result showed that the alloy with highest adding rate (5% wt) have the best response between other alloys for hardening in longer time period and we reached to highest hardness (125 H.V) in time period (4hr) at (220 C?). While the alloy that doesn't have nickel reached to highest hardness equal to (112 H.V) in time period less than (2hr). The phases that created in alloys had been listed through analysis the x - ray diffraction and study the microstructure; we found the phase (Al7Cu4Ni) that be responsible on showing in alloy's response to precipitation hardening which leads to delay, also we found that the adding of nickel causes increase and improve in properties of tensile strength, yield strength and elongation, this is belong to presence of nickel that takes two ways, a part of it dissolves with Aluminum and copper and produce the phase (Al7Cu4Ni) which slows producing the phase (Al2CuMg), and other part refining grains size at highest temperature degrees that leads to increase in strength and hardness with higher rates for alloys contain nickel in comparison to those empty of nickel.

الحماية من التاكل لقواعد الاعمدة الكهربائية في الترب ذات المقاومية المنخفضة Corrosion Protection of Electrical Bar Stands In Low Resistivity Soil

اسم المؤلف: اياد نصيف جاسم
اسم المشرف: سامي ابراهيم جعفر الربيعي
السنة: 2014
الموضوع الدقيق: هندسة المعادن
الدرجة: ماجستير
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: يستخدم الفولاذ المغلون في تصنيع الاعمدة الكهربائية لامتلاكه خواص ميكانيكية جيدة ومقاومة تاكل عالية. وتحت الظروف الاعتيادية يعاني العمود من التاكل بعد عدة سنوات من الخدمة.يصنع عمود الكهرباء من فولاذ St - 52 والمطابق للمواصفة DIN الالمانية ويتالف من ثلاثة | Galvanized steel is used in electrical poles because of the good combination of its mechanical properties and the corrosion resistance. Under normal conditions, electrical pole suffered from corrosion after some years in service. Electrical poles, which were made according to Germany standard DIN st.52, consist of three parts; the upper, mid and lower part. This study focuses on the last part because the surrounding soil of electrical pole is more corrosive than the atmospheric environment, which surrounds to other two parts of the electrical pole. Soil resistivity is the one variable that has the greatest influence on corrosion rate. Electrical poles which at buried in low resistivity soils will generally be anode, whereas electrical poles buried in adjacent high resistivity soils will generally low corrosion.The electrolyte in this work was prepared according to the values of Iraqi soil resistivity. Sodium chloride (NaCl) was used in different concentrations of (2, 2.5, 3 and 3.5) wt. %, which are equivalent to 27, 24, 20 and 18 ohm.cm. Two methods were used in this work in order to improve corrosion resistance, the first method galvanizing process in different thicknesses (80, 90,100,110,120 and130) µm and the second method is coating by different types of Iraqi paints (D - 5547) with hardener (H - 1457)and(G - 5532,G - 5533,D - 5542) with hardener(H - 5533) The corrosion rate and corrosion potential of steel increases and decreases with the increase in NaCl wt.% concentration respectively. Corrosion rates (mpy) with coating thickness are achieved as a function of environment in different soil resistivities. The more corrosion resistance occurs at 120 µm galvanized layer. Micro cracks appear at 130 µm galvanized thickness.In this work, two mixed ratios of paint and hardener were used. These ratios are 2 : 1 and 1 : 1. Paint with mixing ratio equal to 2 : 1 of G - 5532 + G 5533and mixing ratio 1 : 1 D 5542 with hardener 5530 gave the more corrosion resistance.The coating thickness has a direct influence on the performance or life of the electrical pole. As the thickness of galvanized layer increases, the life of protection increases until 120 µm. The life of a zinc coating is a linear function of coating weight for any specific environment. The efficiency of coated electrical pole either by galvanization or paint process was a proximately between 94% to 97% and 98% to 99.6% respectively.

سلوك المواد فائقة اللدونة ذات البنية المجهرية الناعمة لسبيكة المغنيسيوم نوع AZ31B والمشكلة بواسطة التشكيل العالي الانفعال Superplastic Behavior of Fine Grained AZ31B Magnesium Alloy Processed By Severe Plastic Deformation

اسم المؤلف: زياد طارق عبد الوهاب
اسم المشرف: ازل رفعت اسماعيل
السنة: 2014
الموضوع الدقيق: هندسة الانتاج
الدرجة: ماجستير
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: Superplastic properties and microstructure evolution of commercial AZ31B magnesium alloy processed by two different severe plastic deformation methods Equal Channel Angular Pressing (ECAP) and Equal Channel Angular Rolling) ECAR) were studied. Samples were tested in tension at temperature of 623 K and strain rate ranging from 2.4×10 - 4 1×10 - 2 s - 1. ECAP die with 10 ×10 mm cross section channel, oblique angle of ?=90° and ?=13° was designed to refine the alloy microstructure at temperature of 473 K using route BC. Application of ECAP showed a remarkable grain refinement for AZ31B Mg alloy from 14.1 to 2.1?m after three ECAP passes. Maximum superplastic elongation of 261% was achieved at 623 K and strain rate of 2.45×10 - 4 s - 1. The measured strain rate sensitivity was m = 0.33 demonstrating that viscous glide control creep was the dominant deformation mechanism. In most investigation used ECAR process, the die temperature was set to room temperature, in order to avoid cracking intermediate annealing was used for AZ31B Mg alloy which has poor formability at room temperature. This is caused by a lack of active slip systems, especially in the <c+a> direction. However, in this study a special isothermal ECAR die capable of operating without intermediate annealing was used to process AZ31B Mg alloy. The ECAR was carried out at 623 K using a die of ?115 ° channel angle and without rotation. Processing by ECAR showed less effect on the microstructure refinement where the grain size was reduced from 10?m to 4.2?m after six ECAR passes. ECAR increases the yield and ultimate stress and decreases the elongation corresponding to increasing the number of ECAR passes, the as - received material exhibits large amount of superplastic elongation compared to ECAR processed specimens. Therefore superplastic behavior of the AZ31B magnesium alloy was evaluated at temperatures 623 K and strain rate ranging from 7.8×10 - 4 s - 1? 1×10 - 2 s - 1. The test showed that maximum elongation of 367% can be achieved at 623 K and strain rate of 7.8×10 - 4 s - 1. The strain rate sensitivity (m) was evaluated by two different methods, uniaxial tensile test on the basis of the true stress true strain curve and by strain - rate jump test. The results show small differences between the two method) m = 0.42 - 0.45), which demonstrate that the grain boundary sliding (GBS) is the dominant deformation mechanism during superplastic test Keywords : Superplasticity. Severe plastic deformation. AZ31B magnesium alloy.

نظام ذكي لتقييم الخشونة السطحية لعملية تشكيل الصفائح التزايدية Intelligent Surface Roughness Evaluation System of Ismf Process

اسم المؤلف: اوس خالد ابراهيم
اسم المشرف: وسام كاظم حمدان
السنة: 2014
الموضوع الدقيق: هندسة الانتاج
الدرجة: ماجستير
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: تعد عملية تشكيل الصفائح التزايدية تقنية حديثة نسبيا لتشكيل الصفائح المعدنية والتي توفر امكانية تصنيع اجزاء معقدة الشكل وذلك باستخدام مكائن التفريز المبرمجة (CNC milling machines) بدون الحاجة الى قوالب خاصة لكل منتج والتي تتطلب وقتا طويلا للتصنيع مقارنة مع | Incremental Sheet Metal Forming (ISMF) is a modern sheet metal forming technology which offers the possibility of manufacturing 3D complex parts of thin sheet metals using the CNC milling machine. The surface quality is a very important aspect in any manufacturing process. Therefore, this study focuses on the surface quality of parts produced by single point incremental forming (SPIF) process. As a consequence, the objective of this study is to control the surface roughness by studying five forming factors, namely; (tool diameter, step size, tool shape, rotational speed and slope angle).In order to evaluate the surface quality, practical experiments for forming pyramid like shapes have been carried out on sheets of aluminum AA1050 with thickness 0.9 mm. As a result, two Adaptive Neuro - Fuzzy Inference systems (ANFISs) are conducted for predicting the surface roughness. The first system depends on the five forming factors as a direct contact estimation method while the second system utilizes contactless parameters (average gray level, standard deviation and mean frequency) that are extracted from the products images using a vision system as a contactless prediction method. A third model is developed using Sugeno Fuzzy Inference System (SFIS) for the evaluation of forming factors by which the surface roughness for a certain slope angle is obtained.Both quantitative and qualitative assessments have been used to explore the effects of the five forming factors on surface quality of parts produced by SPIF process. The ANOVA and MEP results show that the incremental step size and the forming tool shape are the most important factors affecting the surface roughness. These two factors are directly and inversely proportional to the surface roughness respectively. The maximum and minimum surface roughness, which is achieved from all the 24 experiments is (Ra = 4.3 & Ra = 0.18 µm) respectively. As a result, a surface with roughness smaller than the initial roughness of the sheet (0.27 µm) has been obtained. The qualitative assessment reveals that the surface roughness tends to increase towards the part deep.It can be concluded that the image based estimation of roughness using ANFIS is superior in terms of prediction accuracy. This vision system can achieve (97.856%) testing prediction accuracy compared to (85.799%) that is reached by the direct contact estimation of roughness. Conclusions also show that the vision system is capable of predicting the surface roughness of a hyperboloid part as a non - linear shape with prediction deviation (14.411%), thus enabling to evaluate the surface quality of complex parts that cannot be measured by the stylus. It can also be concluded that the SFIS is a successful approach for estimating the forming factors by which the surface roughness for a particular slope angle is obtained.

متغيرات اللحام المثلى بالقوس الكهربائي المغمور باستخدام طريقة تاكوشي Optimizing of Submerged Arc Welding Parameters Using Taguchi Method

اسم المؤلف: هشام جواد كاظم
اسم المشرف: احمد علي اكبر اكبر
السنة: 2014
الموضوع الدقيق: هندسة المعادن
الدرجة: ماجستير
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: اللحام بالقوس الكهربائي المغمور غالبا مايستخدم في الصناعات الثقيلة. يستخدم في هذا النوع من اللحام سلك لحام مستمر يكون معدنن الملئ. االقوس يكون مغمور في مساعد الصهر والذي يتم تغذيته من خلال انبوب في حاوية اعلى سلك اللحام الذي يغذى باستمرار. مساعد الصهر يع | Submerged arc welding (SAW) is often used for heavy industries. The SAW process employs a continuous bare wire electrode that is consumed to produce filler, the arc is submerged in the flux, and the flux is supplied through a funnel located ahead of the filler wire which is fed continuously from a hopper, the flux contributes to deoxidize the base metal, and protect the molten weld metal from atmospheric contaminants In order to achieve best weld quality and good mechanical properties in manufacturing industries which need to be optimized. Selection of appropriate SAW parameters is essential to ensure a predictable weld bead which is important for obtaining high quality welding.Manufacturing industries and training centers often face the problem of selecting appropriate or optimum combinations of input welding parameters for achieving the required weld quality. Three input parameters of SAW were used to weld the steel plates, and four levels for each parameter, and three output response variables were used The experimental work consists of welding of sixteen low carbon steel plates of (AISI 1005) specimen measured 300 mm × 50 mm × 12 mm were submerged arc welded using welding currents (280, 340, 400, 460) amp, voltage (26, 29, 32, 35) volt and welding speeds (3.3, 5, 6.6, 8.3) mm/s This work details the application of Taguchi design to determine the optimal SAW parameters. An effort has been made to study the effect of SAW process parameters (current I, voltage V, speed S) on the bead geometry dimensions (depth of penetration P, bead width W, heat affected zone width w).Signal to noise ratios are computed to determine the optimum parameters. Statistical models have been developed based on multiply regression analysis relating the bead geometry with process parameters. The adequacy and significance of the models were checked by using ANOVA technique, also the models are validated using normal probability plot, and residual versus fit plots.The models were employed easily in form of executed program designed by using Visual Basic 6 software. The objective of such models and designed program is to predict weld bead geometry which enables selecting the desired weld parameters and select the weld bead dimensions. The effect of SAW parameters on heat affected zone and weld metal hardness also has been studied by means of hardness measurements, and grain size measurement using intercept method. Main and interaction effects of the process parameters on bead geometry are presented graphically. The experimental results were analyzed by using Minitab 16 software.It was found that current (280 to 460) amp causes increase in depth of penetration from (1.742 to 3.752) mm and HAZ width (1.222 to 1.512) mm. Bead width increases from (10.99 to 13.13) mm with increase in voltage from (26 to 35) volt and decreases from (12.61 - 11.80) mm with increase in welding speed from (3.3 to 8.3) mm/s. The welding speed and voltage do not affect appreciably the depth of penetration. Also change in weld speed reduces the width of the HAZ from (1.462 to 1.295) mm. The hardness of HAZ reaches maximum value 122.39 HV at the center of HAZ and decreases gradually toward the BM 109.22 HV; also it was found that the executed program is a useful tool used to predict weld bead geometry dimensions from welding parameters for SAW process.

التفريز المبرمج باستخدام ملفات STL Cnc Milling Using Stl Files

اسم المؤلف: نادية سامي حسن
اسم المشرف: ليث عبد الله محمد
السنة: 2014
الموضوع الدقيق: هندسة الانتاج
الدرجة: ماجستير
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: تعد ملفات (STL) من الملفات المهمة في برامج الرسم والتصميم المعان بالحاسوب (CAD) والشائعة الاستخدام حاليا في النمذجة السريعة وانظمة التصنيع المعان بالحاسوب (CAM). يتناول هذا البحث اقتراح وتطوير خوارزميات لقراءة ملفات (STL) واستخلاص السمات الهندسية اللازم | Stereolithography (STL) files are considered very important files in both computer aided drawing and design (CAD) programs and are commonly used now days in both rapid prototyping and computer aided manufacturing (CAM) systems.This thesis proposes and develops algorithms to read (STL) files and extract engineering entities required in CNC milling processes. The proposed algorithms are dependent on some mathematical modeling and manipulations of the engineering model by slicing an (STL) file to many slices and then building the required algorithms to adopt these slices to generate CNC machining paths as G - Code.The proposed system in this work is divided to three parts, in the first part of this thesis an algorithm is proposed to extract engineering object entities to some proposed models based on their (STL) files using Matlab program. The proposed models include cube, cylinder, dome, cone and cavity models. In the second part of this thesis, a slicing algorithm is proposed to enable the slices along the proposed models z - axis to find and navigate the required manufacturing data. UGS CAM program was used also to generate the tool paths and to simulate the machining process and then generate NC part program of the proposed objects (G - Code). The machining process was achieved using 3 - axis CNC milling machine, at spindle speed of (700 rpm) and feed rate (60 mm/min).Finally, the third part of this thesis includes comparing results produced based on both (STL) and (UGS), to achieve the required aim by experimentally comparing both objects surface roughness and evaluate their geometrical variations.According to the experimental results, the objects produced using STL models are clearly have rough surfaces compared with the surfaces produced by UGS with average percentage of 13µm, and according to the geometrical variations experiments, CAD readings are in good agreement with experimental results and confirm the validity of the proposed approach with 4.5mm of shape error.

دراسة وتطبيق ضمان الجودة والاعتماد الاكاديمي في مؤسسة تعليمية Study And Application of Quality Assurance And Academic Accreditation In Educational Institute

اسم المؤلف: عبد الستار احمد عبد الله حطاب
اسم المشرف: حسين سالم كيطان
السنة: 2011
الموضوع الدقيق: الهندسة الصناعية
الدرجة: ماجستير
اللغة: العربية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: ان بناء المجتمع الحديث يتطلب منا الاهتمام بالبناء المعرفي له والذي يعد التعليم اهم ركائزه الاساسية، ولذا من الضروري ان تكرس الجهود والطاقات اللازمة لتحقيق طفرة نوعية فى مجال التعليم. وقد اصبح اليوم ضمان جودة التعليم والاعتماد الاكاديمي ضرورة تسعى كل المؤس | Building the new society needs us to care for the acknowledge building for it which the education considers as the most important pillar of it, so it is necessary to Dedicate the efforts and energies to achieve a quantum leap in the field of education. Today Quality Assurance of education and academic accreditation become a need that all educational institutions are seeking to reach, Where these institutions are making great efforts to improve the quality of higher education and scientific research in order to improve the fields of the academic performance and the scientific research to achieve the quality of education and qualifying its institutions for exact accreditation by the global bodies for quality assurance and accreditation.The educational institution remains the suffering from the weakness problem in terms of dispersion of scientific capacity, And the weak of providing the services whether on the level of the assessments Curriculum or in the level of the performance of the educational and the management institution that leads to a big failure in the practical and educational results without achieving the Quality standards and quality assurance, which affect negatively on the match of the international standards, and that consider as a Serious indication of the reputation, efficiency and quality of the educational process.This research aims to assurance the quality if the higher education institution in Iraq and applying the Academic accreditation standards accredited by international institutions by building an inclusive knowledge base in the fields of quality assurance and the academic accreditation of institutions of higher education, and by developing mechanisms to achieve it and following up its implementation and to identify standards in the educational institution, also by building an information base to apply the standards of the academic accreditation set by the international institution.In this research a Proposed methodology has been built to solve the problems in relates, and to achieve the desired goals fits to the environment of the higher educational institutions in Iraq. The researcher put standards of the quality assurance and the academic accreditation in the Iraqi educational institution through the studying of the arts of the quality assurance and academic accreditation and through viewing the experiences of the Arabic and the international universities that have it. And this will be through building a system that includes a database, models and standards of quality assurance, as it contains the most important fields and accredited indicators that consider the main standard to measure the academic accreditation degree. The mathematical model which calculates the level of the academic accreditation applied now in the educational institution has been built and developed depending on the importance theory (weighted percentile), for each of the fields and the accredited indicators.The suggested work has been performed through : 1 - Designing a computer system by using visual basic program, that calculates the degree of the academic accreditation, and measuring the weighted percentile for all potential fields, indicators and the Weighted means.2 - Building a database by using Microsoft access program that include all of the data of the weight and the values of the fields and the indicators.This system has been applied by accrediting two applicable cases in the Iraqi higher educational institution, the first case was the educational institution in general (Humanitarian, scientific). The second case was a Specialized institution which is the university if technology (Engineering, applied scientific).The researcher has reached to the degree of the academic accreditation actually applied for both of scientific institutions and getting the values and the real weight for the fields and the indicators accredited in this research, also to find the strength points and marking the weakness points inside the higher education institutions. The results that been reached show that the academic accreditation rate applied in the educational institution in general (Humanitarian, scientific) is (82%), and this is the first applicable case, while the rate of the second applicable case (Engineering, applied scientific) reached (81.39%).The results explained that the most important axis in the educational institution is the scientific research, with a rate (11.96%), then the fields of teaching staff with a rate (11.31%), then the Students Axis came third regarding to the importance with a rate (11.01%) and the other fields came come after these fields.These research and the results which been reached considered as the first begin and basic pillar can be depended on it in the future for the insurance of the quality of the higher education institution in Iraq and to Meet internationally recognized standards.

دراسة العوامل المؤثرة في خواص مسحوق القصدير المنتج بطريقة التذرية بالطرد المركزي Study of The Factors Effecting The Properties of The Tin Powder Produced By The Method of Centrifugal Atomization

اسم المؤلف: علي حسين علي كريم
اسم المشرف: منذر محمد راضي
السنة: 2008
الموضوع الدقيق: هندسة المعادن
الدرجة: ماجستير
اللغة: العربية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: يتضمن البحث دراسة بعض متغيرات عملية التذرية بالطرد المركزي لغرض انتاج مسحوق معدن القصدير النقي وملاحظة مدى تاثير هذه المتغيرات في خواص المسحوق الناتج وهذه المتغيرات هي : - 1. سرعة دوران الجزء الدوار2. وسط التبريد3. درجة حرارة وسط التبريد تم ملاحظة تاثي | The research included a study for the variables of the process of centrifugal atomization for the purpose of producing pure tin metal powder and the effect of these variables in the properties of the resulting powder. These variables are : 1. The speed of rotation in the rotating part. 2. The medium of cooling. 3. The temperature of medium of cooling. The affect of these above variables were observed on the size and the shape of particles resulting and the particle distribution, the apparent density, tap density and the angle of repose. Upon the use of three different speeds (2000, 6000, 10000) (rpm) on the each at a time for the rotating of the hollow bowl and the use of water at the room temperature. It was noticed that when increasing of revolution speed, there is no change in the shapes of particles i.e. the wide extent of shapes remain irregular, acicular and semispherical, and that the weight percentage of the small particles increases. Also, the value of the apparent density and the tap density increases while the angle of repose decreases. It was also observed that at the use of air and water separately at the room temperature as cooling media and disintegration the fused droplets of tin metal out of the hollow bowl at rotation speed of (10000) rpm. Moreover, we can notice that the weight percentage of the small particles increases as well as the value of the apparent density and tap density, while the value of the repose angle decreases , and the absence of any change in the shape of the particles when using water as a medium of cooling , compare with air. A great range of irregular, acicular and semispherical shapes are also obtained. Water of different temperatures ({40 - 50}, {60 - 70}, {80 - 90})? C were was used as a cooling medium and for the disintegrating of the droplets of the tin metal from the hollow bowl at rotation speed of (10000) rpm, and the formation of powder of different sizes and shapes. Also, the tendency of the particles towards regularity of shape and the spherical shape clearly with the decrease of the weight percentage of the small particles , and the value of apparent density and the tap density increase and the value of the angle of repose decreases at the increase of the temperature of water cooling medium.

دراسة التاكل الميكانيكي الجاف لمادة متراكبة ذات اساس (SiC / Al - 4% Cu) Studing Dry Mechanical Corrosion For Composite Material of Base (Al - 4% Cu / SiC)

اسم المؤلف: وليد تركي راشد
اسم المشرف: احمد علي اكبر اكبر هجران زين العابدين
السنة: 2012
الموضوع الدقيق: هندسة المعادن
الدرجة: ماجستير
اللغة: العربية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: تم في هذا البحث دراسة مقاومة البلى لمواد متراكبة معدنية ذات اساس من الالمنيوم (Al - 4%Cu) باستخدام جهازذو ترتيبة المسمار على القرص (Pin on Disk) وتحت ظروف اختبار مختلفة هي (الحمل المسلط , نسبة اضافة دقائق كاربيد السليكون ,سرعة الانزلاق , زمن الانزلاق).حيث | In this research (study) wear resistance of composite materials based on metal, aluminum (Al - 4%Cu), has been studied under different test conditions (applied load, the proportion of added silicon carbide particles, a speed of sliding, sliding time) using a pin on the disk technique. Composite materials prepared using stir casting method, where vortex technique help to draw the ceramic particles into the molten metal and distributed uniformly. The composite materials containing 4 wt% Cu and 1 wt% Mg, reinforced with different proportions wt% SiC (3,6,9,12) were cast in a metal mold. Magnesium was added to improve the wetability between SiC particles and the aluminum matrix. The base alloy and composite materials samples were tested to investigate microstructure, phases, and properties using Optical Microscope, X - Ray Spectrometer, Vickers Hardness, and Scanning Electron Microscope. The optical microscope and scanning electron microscope (SEM) are also used to study the effect of loads on the worn surface. From the results of microscopic examination on found that the alloy structure of the foundation is a fine dendrite structure (Dendrite), and after the addition of ceramic particles leads to an improvement in microstructure, in addition to distributed almost homogeneous in the matrix and on the boundaries crystalline. X - ray diffraction examination approved the existence of aluminum and silicon carbide phases. In addition to the deposition phase (Al2Cu) because of the natural aging,(Mg Al2Cu) phase and the presence of this freak indicate on the interaction of aluminum with the added elements, The hardness test results show that, the increasing the ceramic particles proportion tend to increase the hardness, the highest hardness found at 12wt% SiC. By studying the worn surface, using optical microscope and SEM, increasing in wear was observed with applied load for all reinforced particles percentage added. With the increased load, more wear, deep, and closed paths was formed. Twotypes of wear were monitored at high loads, adhesive wear and abrasive wear. The studying of wear rate for both base alloy and composites materials with various conditions, show that wear rate increase with increasing applied load, but the composite materials show higher wear resistant. The best wear resistance found at 12 wt% SiC addition.The studying of sliding speed show that the wear rate decreases with high speed the for both base alloy and composites materials. The sliding time show direct correlation with wear rate, but at continuous increasing sliding time, wear rate decline constantly.Statistical methods with software (Minitab 15) was used to study the effect of wear on weight loss for both the base alloy and composite material by using three variables; ( applied load (X1), silicon carbide proportion (X2), sliding distance (X3), with five levels of each variable. It was concluded that the optimum weight loss (Optimization of weight loss) (0.0046 g), as a result the wear process, are found at the these following levels of variables; applied load (2.5 N), sliding distance (7.2 Km) and at the silicon carbide proportion (3.6364 wt% Sic). Equation describes the combined effect of variables and the weight loss was obtained and which variable are more influential. Y = 0.010180 + 0.002825 X1 - 0.002375 X2 + 0.001100 X3 + 0.001809 X32 + 0.004700 X1 X3 + 0.002700 X2 X3 The applied load (X1) and sliding speed (X3) both have the largest effect on weight loss. Both, applied load and silicon carbide does not have any effect on the weight loss. For individual variable, it foundthat applied load has the greatest influence on weight loss.

دراسة انتقال الحرارة لمسبوكات المواد المنتجة بطريقة الطرد المركزي A Study of The Heat Transfer For Alloys The Materials Produced By Use Centrifugal Casting

اسم المؤلف: محمد قاسم محسن
اسم المشرف: نوال عزت عبد اللطيف كريمة اسماعيل عموري
السنة: 2009
الموضوع الدقيق: هندسة المعادن
الدرجة: ماجستير
اللغة: العربية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: تم كتابة برنامج حاسوبي بلغة فورتران (90) لدراسة الانتقال الحراري لبعدين(2 - D) بطريقة الفروقات المحددة المباشرة (Explicit Finite Difference Method) للمسبوكات ( Al - 4.5%Mg)،(Al - 7%Si)،المنتجة بطريقة السباكة بالطرد المركزي الافقية، اذ تم حساب سرعة دوران | Mathematical program writing completion by Fortran 90 to study the heat transfer in two dimensions(2 - D) by use explicit finite difference method for two alloys(Al - 4.5%Mg),(Al - 7%Si),this alloys were produced by the horizontal centrifugal casting, The mold rotation speed for the centrifugal casting was calculated and it was put in the mathematical program at the change of the mold rotation speed N=(100,1000,1500)rpm. And study the effect of the change of the mold rotation speed on the cooling rate and microstructure and hardness. We input to the mathematical program the boundary condition of the mold from (temperature ambient and heat transfer coefficient by convection of the alloys external)and input thermal physical properties of the alloys from (coefficient thermal conductivity of liquid and solidus,density of liquid and solidus, solid fraction, , specific heat of liquid and solidus, liquid temperature, latent heat of solidification, solidus temperature, alloys melting temperature),then we melted the alloys by use electric furnace and poured the melting alloys in the centrifugal casting mold after proceeding heating prematurely to the mold by used gaseous torch and fixing(digital thermal couple). We input to the mathematical program. And study the difference in mold rotation speed and it’s effected on the cooling rate of the both alloys and the mold and microstructure and hardness , and study the difference in the mold material effected on the cooling rate of the both alloys, and study effected the mold heating on the cooling rate of the both alloys. As a result we noted that the solidification time of the alloys is dependent upon the speed of rotation of the mold.

دراسة مقارنة بين T - spline وNURBS في النمذجة والتشغيل باستخدام ماكنة التفريز المبرمجة Comparison Study of T - Spline And NURBS In Modeling And Machining Using CNC Milling Machine

اسم المؤلف: مهند مصدق جعفر
اسم المشرف: ليث عبد الله محمد
السنة: 2014
الموضوع الدقيق: هندسة الانتاج
الدرجة: ماجستير
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: نمذجة السطوح باستخدام تقنية الـ (T - spline ) تعد من اهم الوسائل المتسخدمة الان في التصميم المعان بالحاسوب (CAD).يهدف البحث الى زيادة الانتاجية من المنتجات المعقدة من خلال تعزيز عملية النمذجة السطحية للمنتج وتعزيز التصنيع باستخدام T - SPLINE للنمذجة السط | Surface modeling utilizing T - spline technique is one of the most important tool now in computer aided design (CAD).ThisThesisaims to increase the productivity of complicated products through enhancing the process of product surface modeling and manufacturing by using T - spline for surface modeling. This method provides the designer with many powerful tools to add details only where necessary on the CAD modeling, create non - rectangular topology of the surface, easily edit complex freeform models, and besides maintaining NURBS (non - uniform rational B - splines) compatibility of the model.ThisThesisuses T - spline for surface modeling and compare it with NURBS modeling to get the best modeling points between the two methods. The comparison will be through surface analysis and manufacturing process.ThisThesisincludes design of two types of models : convex model (bicycle seat) and concave model (longitudinal section of the bottle) for each T - spline surface and NURBS surface using Rhinoceros 5.0 software which has been transformed to UG - NX8.5 software to get the machining process simulation and G - code programs for the models. The models have been machined using 3 - axis vertical CNC machine (C - tek) type.Finally, analysis of surfaces (Environment Map analysis, Zebra analysis, Naked Edges analysis, Gaussian Curvature analysis, data structure analysis, Draft Angle analysis) by Rhinoceros 5.0 software and measurement of the roughness by Pocket Surf equipment and measurement runtime for machining by timer, shows that the T - Splines surfaces typically have (50 - 70%) less geometric data structure [ surfaces , 3d curve , 2d curves , vertices , edges , trims , loops , faces ] than the equivalent NURBS surface, inEnvironment Map analysis, the image of T - Spline surface for the models is reflected moreclearly than a NURBS surface, in Naked Edges analysis, the T - Spline surface for the models has a number of naked edge less than the NURBS surface, in measurement runtime for machining (roughing and finishing), the T - spline surface for the bicycle seat model is machined in (16 minutes) less than machining the NURBS surface, and the T - Spline surface for the longitudinal section of the bottle model is machined in (10 minutes) less than machining the NURBS surface. In measurement of roughness, the T - Spline surface for the bicycle seat model has (2.4861 µm) average (Ra) for patches measured roughness average (Ra), and the NURBS surface has (4.9216 µm) average (Ra) for patches measured roughness average (Ra).

تحليل مسار العدة في عملية التشكيل التزايدية للصفائح المعدنية Analysis of Tool Path In Incremental Sheet Metal Forming Process

اسم المؤلف: ميثم سعد علي
اسم المشرف: وسام كاظم حمدان
السنة: 2014
الموضوع الدقيق: هندسة الانتاج
الدرجة: ماجستير
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: التشكيل التزايدي للصفائح المعدنية هو عملية مرنة للغاية ومتعددة الاستعمالات للتصنيع السريع لاجزاء الصفائح المعدنيه المعقدة حيث تمتلك امكانية التكيف بامتياز مع انظمة التحكم الرقمي بالحاسوب (مكائن التفريز المبرمج CNC) من خلال السيطرة المباشرة على بيانات CAD | Incremental sheet forming (ISMF) is a highly versatile and flexible process for rapid manufacturing of complex sheet metal parts. It has excellent adaptability to computer numerical control (CNC) systems through direct control of CAD data, minimizing the use of specialized tooling and presses. A sheet of metal is formed by a progression of localized plastic deformation using simple forming tool controlled by a CNC machine - tool. The aim of the presented thesis is to investigate the feasibility of incrementally forming of 3D complex shape (like automotive heat shield shape) and the solar cooker shape by Single Point Incremental Forming process without using a dedicated die depending on different tool paths. Six different forming tool paths (unidirectional ZLVTP, bidirectional ZLVTP, FPRTP, ZGZTP, BSLTP and HSLTP) were generated byUnigraphics - NX8 (UGS - NX8) programing system and applied to realize solar cooker shape and automotive heat shield shape. The feasibility investigation and development of automotive heat shield shape is based on three control factors are tool path type, forming tool head shape and the Z - increment (vertical pitch). For each of these factors, levels were tested. The tool head shape and vertical pitch contain their both on two levels while the tool path type on six levels. Hence, 24 experiments applied to realize automotive heat shield shape based on a full factorial design of experiments, and 6 experiments applied to realize solar cooker shape. Hybrid tool paths are tested to explore the applicability these paths in ISMF process. This thesis discussed the impact of tool paths types and other control factors (tool shape and vertical pitch) on the three different quality characteristic namely geometrical accuracy, thickness variation and forming time. The significant of the control factors are explored using two statistical methods are analysis of variance ANOVA and main effect plot. All experiments were carried out on sheets of Aluminum Alloy (AL1070) with thickness 1.5 mm by using 3axis CNC machine. The CNC machine and dial gauge are used to measure dimensional accuracy and final thickness of formed parts respectively. Depending on the results of this work, Helical - Streamline tool path (HSLTP) and follow periphery tool path (FPRTP) are achieved higher geometrical accuracy when forming the solar cooker shape and the automotive heat shield shape respectively. On the other hand, Z Level profile tool path (ZLVTP) is the best tool path to achieve homogeneous thickness distribution and minimum forming time of formed parts. Hybrid tool paths are undesirable in incremental sheet metal forming. The ANOVA results show that all control factors have influence on the accuracy, especially the tool path type. The tool shape and vertical pitch have no influence on the thickness of the formed parts. But, the vertical pitch has major effects on the forming time and accuracy. In contrast, the tool path shape has a great influence on the process implementation.

التحقيق التجريبي والعددي للصفائح الرقيقة المثقوبة تحت الشد Experimental And Numerical Investigations of Thin Tensioned Plates With Holes

اسم المؤلف: ارشد عبد الله راشد
اسم المشرف: كريم محسن يونس
السنة: 2014
الموضوع الدقيق: هندسة الانتاج
الدرجة: ماجستير
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: ان الصفائح المثقوبة تستخدم عالميا في تصنيع الھياكل في التطبيقات الميكانيكية والانشاءات كمثال على ذلك ھياكل الطائرات والتراكيب الطبية ووصلات الربط الخ. ومن المعروف جيدا ان استعمال الثقوب في الھياكل المجھدة تولد اجھادا موقعيا عاليا في منطقة من الثقب تعرف بم | The plates with holes are used in cosmopolitan for manufacturing structures in mechanical and civil engineering applications like aircrafts, medical structures, joint connection applications etc. It is well known that utilizing holes in stressed structures produces highly localized stresses at area of the holes known as the stress concentration area,which leads to reduce the mechanical strength of the structures.The main objective of this study is to investigate the effect of three parameters on the stress concentration factor in plate with two holes having different size holes and subjected to uniaxial tension. The three parameters include firstly, the location of holes when oriented with respect to axis of loading, parallel, transverse and inclined with line of uniaxial tension load at different angles. Secondly, the aspect ratio for the hole size (large to small radius).The last parameter effect is the distance between two holes.Numerical simulation using finite element method for two - dimensional model is developed to determine the maximum value of Von Mises stress with commercial software package ANSYS V.11.The experimental photoelastic technique is carried out on fabricated polycarbonate model loaded in one direction. From the analysis of the results, it is found that the maximum stress concentration factor is at the point tangent to the edge of the hole. The comparison between the finite element method and experimental photoelastic technique results showed the stress concentration factor, which obtained experimentally and with finite element method are congruent, since the maximum variation between the two results is about 7.03% As well as the highest and lowest value of the stress concentration factor equal to 3.1973, 2.0640 at value of angle 60°, 90° respectively.It is recommended from the above conclusions that manipulating the three parameters which effect the stress concentration factor are namely, holes position, size, and distance between two holes on the plate that used in the application will play essential role to reduce the value of stress concentration factor which subsequently crucially minimize or avoid fast failure. This can be translated into saving precious lives preventing money wastage due to structures damage ending into catastrophe.

فحص بلى عدة القطع المعان بالرؤيا الحاسوبية خلال عملية الخراطة Computer Vision Aided Inspection of Cutting Tool Wear In Turning

اسم المؤلف: علي كريم علوان العكيلي
اسم المشرف: علي عبار خليف
السنة: 2014
الموضوع الدقيق: هندسة الانتاج
الدرجة: ماجستير
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: في الوقت الحاضر , تحظى مكائن القطع المبرمجة باھمية كبيرة في المعامل والورش التصنيعية بسبب دقتھا العالية ومرونتھا لكن لسوء الحظ لا تزال ھذه المكائن غير قادرة على التاكد من جودة السطوح المنتجة. الاتجاه نحو اتمتة عمليات القطع سير للحاجة الملحة للحصول على ج | Nowadays, computerized numerically controlled (CNC) machines have high importance in manufacturing factories and workshops due to their high accuracy and flexibility. Unfortunately they still cannot ensure the quality of machined products. The trend towards automation in machining has been driven by the need to maintain high product quality with improving production rate, these improvements can be possible by monitoring and control of machining process. In this research a vision based monitoringsystem was introduced for the on - line direct automated measurement of the cutting tool flank wear width based on a new algorithm on the basis of canny edge detection and morphological operations for the captured images.Twelve specimens were prepared using STARCHIP CNC turning with four cutting speeds (57,98,110 and 125 m/min) and three depths of cut (0.5,1 and 2 mm) and constant feed of (0.04 mm/rev). Maximum and minimum absolute error and error percentage in the maximum flank wear width was (0.058,0.002 mm) (9.7,0.54 %) respectively. The results show the effectiveness of the proposed method in the monitoring of the tool condition.Also, Vision based monitoring system was proposed for the measurement of tool nose wear which have direct interaction with the workpiece during machining. Measurement operation is done by comparing reference and worn tool images; the algorithm is composed of image preprocessing, Otsu thresholding, conforming method for the exact alignment between the two images and image subtraction is performed in order to detect the nose wear area. Morphological opening by reconstruction was used to remove isolated foreground pixels result in due to the quantization errors. The maximum and minimum error percentage in tool nose wear area (6.72,0.48 %) respectively; the experimental results show that nose wear occurs after the flank wear exceeded its maximum standard limit in roughing operations Keywords : tool wear, flank wear, nose wear image processing, automated visual inspection, tool condition monitoring.

دراسة سلوك البلى الانزلاقي الجاف لسبائك المنيوم - 7% سليكون عمليا وباستخدام تقنية تصميم التجارب Studying Dry Sliding Wear Behavior of Al - 7% Si Alloys Using Experimental And DOE Techniques

اسم المؤلف: قاسم سعد عبد الواحد
اسم المشرف: عقيل ظاهر صبحي علي عبار خليف
السنة: 2014
الموضوع الدقيق: هندسة المعادن
الدرجة: ماجستير
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: تعد سبائك الالمنيوم - سليكون والتي تحتوي على التيتانيوم احدى المواد التي تتميز بمقاومتها للبلى كما بينت الدراسات والابحاث العلمية ذلك.في هذا البحث تم صب سبيكة المنيوم - 7% سليكون وبنسب مختلفة من التيتانيوم (0.5 , 1 , 1.5%) وتحت معدلات تبريد مختلفة في قال | Aluminum - silicon alloys that contain Titanium can be considered one of the wear resistant materials and attract several researchers recently.In this work ,Al - 7%Si alloy with different percentages of Ti ( 0.5 , 1 , 1.5% ) was poured under different solidification conditions into the metal mould.All prepared alloys were dry slided under different bearing pressures ( 5 , 10 , 15 , 20 , 25 N ) on the steel counterface surface using pin on disk wear apparatus. Optical microscope and scanning electron microscope (SEM) were used to study the microstructure and determine wear mechanism of Al - Si alloys respectively. On the other hand , X - ray diffraction technique (XRD) was used to determine the phases that were present in the matrix of Al - Si alloys.Microstructural analysis and X - ray diffraction showed that two phases are presented in the matrix of Al - 7%Si alloys.These phases are ? - aluminum and eutectic and three phases are present in the matrix of Al - Si alloys that contains Ti. These phases are ? - aluminum ,eutectic and titanium aluminide Ti9Al23.Significant refinement occurred for ? - aluminum, eutectic and titanium aluminide Ti9Al23 phases when using metallic mould cooled with cold water in comparison with heated and unheated metallic moulds Hardness was increased with increasing Ti percentage and with increasing the severity of solidification condition used.Remarkable changes in the wear rate occurred for Al - Si alloys during dry sliding in which the magnitude of wear rate was dependent on the Ti percentage ,load and solidification condition used.Design of experiment (DOE) was used to optimize the effect of process variables ( load and Ti percentage) on the wear rate under different solidification conditions using computational statistical software (Mintab 16).

تاثير التشكيل على البنية المجهرية وسلوك البلى للمواد المعدنية المتراكبة النانوية Al2O3 / A356 The Role of Forming On Microstructure And Wear Behavior of Metal Nano Composite Al2O3 / A356

اسم المؤلف: مروان باسل حسين
اسم المشرف: نوال عزت عبد اللطيف عقيل ظاهر صبحي
السنة: 2014
الموضوع الدقيق: هندسة المعادن
الدرجة: ماجستير
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: في هذا البحث تم تحضير المواد المركبة النانوية اساس معدني (A356/Al2O3) باستخدام تقنية (rheocasting) ومن ثم تم اجراء عملية التشويه على الساخن عند درجة حرارة °250 م.في البداية تم صهر السبيكة A356 في درجة حرارة °730 م بعدها تم تبريدها الى درجة حرارة الشبه ص | In the present work Al2O3/A356 nano composites have been prepared using rheocasting technique, the nano composites were then processed using hot deformation at 250 °C.Firstly A356 matrix alloy was melted at about 730 °C, the superheated molten alloy was allowed to cool to the semi - solid temperature at 600 °C, then Al2O3 nano - particles with different size (10,20) nm and different weight percentages (1 and 2)%wt were added inside the vortex formed due to stirring , hot deformation carried out with different ratio 30% and 40% at the temperatures of 250 °C and strain rates 0.1 s?1. The produced nano composites samples were characterized using optical and scanning electron microscopy ,X - ray diffraction , hardness test and wear test using pin on disc apparatus. The results of microstructural observations showed that the Al2O3 nano particles cluster mostly near the grain boundaries and form a band surrounding the grain boundaries. The dendritic structure of ? - Al phase is fragmented and the ? grains became more uniform and smaller than their corresponding as - cast 356 alloy. On other hand the microstructures of nano - Al2O3/A356 composites after casting and hot deformation at 250°C, showed modification of ? - Al and Si eutectic. The columnar dendrites ? - Al phase changed to the nearly equiaxed grains or globular morphology. The results of hardness test showed that the nano Al2O3/A356 composite were exhibited higher hardness than the as - cast A356 alloy The nano - composites hardness, increase with increases the size and increases in weight percentage of the Al2O3 nano - particles, and with increasing percentage deformation. The result of wear test showed that the hot deformed nano Al2O3 /A356 composites have greater wear resistance compared with hot deformed A356 alloy. Furthermore, with increasing the particle size and the percentage of Al2O3 nano particles, wear rate will decrease. The results also revealed that the optimal results was achieved at the nano - composites containing 20nm Al2O3 particles after hot deformation with 40%. SEM studies of the worn surface of nano composites showed that the main wear mechanism was oxidative in conjunction with metallic wear.

كلال الدورات المنخفضة في سبيكة المنيوم قابلة للتصليد بالترسيب Low Cycle Fatigue of Precipitation Hardened Aluminum Alloy

اسم المؤلف: سيف خالد محمود
اسم المشرف: ظافر صادق الفتال
الموضوع العام: هندسة الميكانيك
السنة: 2014
الموضوع الدقيق: ميكانيك تطبيقي
الدرجة: ماجستير
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: لسبائك الالمنيوم عالية المقاومة طيف واسع من التطبيقات من صناعة السيا ا رت الى الصناعات الفضائية.ان السبب الرئيسي وراء النمو السريع للطلب على هذة السبائك هو مزيج من الخواص الفريدة التي جعلت منها واحدة من اكثر الت ا ركيب والمواد الهندسية استعمالا، ولذلك ل | High strength AL - alloys have a wide spectrum of applications from automobile to aerospace industries. The demand for these aluminum alloys grows rapidly because of the unique combination of properties which make them the most versatile of engineering and construction materials. Hence, development of high strength Al - alloys continues to be an important area of research.In this work, the influence of different heat treatments on the mechanical properties and fatigue life under low cycles of wrought 7075 aluminum alloy was experimentally investigated. The heat treatments included peak ageing (T6), over ageing (T73) and annealing (O).The effect of heat treatments on the alloy was explained in terms of their influence on the mechanical properties. The results showed that T73 temper has an ultimate strength of 504.7 MPa and elongation of 12.5%. Peak ageing treatment enhanced the strength by 10.9% and reduced the elongation by 7.2%, while in the annealed condition, the strength was reduced and the elongation was improved by 51.33% and 31.2%, respectively. T6 had the highest hardness followed by T73 and O tempers.The flat fatigue specimens were subjected to constant reverse bending load. The tests were performed at the laboratory environment with a frequency of 23.3 Hz and at a stress ratio (R) of - 1. For each temper, strain - life graphs were obtained for specimens with notches in the form of central cylindrical holes made by drilling. The fatigue resistance of specimens with notches was compared to the results for notch - free specimens. It was observed that the presence of a stress raiser, such as a drilled hole, lowers the fatigue life for all tempers. However, the notch sensitivity of the fatigue life was different for each temper.The fatigue crack growth rate of T73 and annealed temper was investigated, the results showed that T73 treated sample exhibits higher crack growth resistance. Paris` equation was derived for each temper Keywords : LCF. precipitation hardening. 7075 aluminum alloy. fatigue crack growth.

دراسة عملية عن تاثير الحز النافذ على اداء ناشرة ثنائية البعد An Experimental Study on The Effect of Permeable Slot on The Performance of Two Dimensional Diffuser

اسم المؤلف: وسام عبد كاطع علي المالكي
اسم المشرف: زينة خليفة كاظم قصي جهاد عبد الغفور
الموضوع العام: هندسة الميكانيك
السنة: 2008
الموضوع الدقيق: قوى حرارية
الدرجة: ماجستير
اللغة: العربية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: يهتم البحث الحالي بدراسة جريان الهواء المضطرب في مرحلة التطور التام (Fully developed) خلال ناشرة ثنائية البعد، ولغرض اتمام الدراسة تم تصميم وتصنيع نماذج اختبار وبزوايا انفراج تراوحت بين ( 30? - 0?)، وكذلك تم تصنيع ناشرة مطورة ثنائية البعد بدون وجود حز ن | The present study deals with flow of air in two - dimensional diffuser. number of test models of diffusers with different angles raging between (0? - 30?).Also a two - dimensional developed diffuser is manufactured without permeable slot for bleeding of

التقنية المثلى الحرارية لاعادة تشكيل القرنية اثناء الجراحة الليزرية Thermal Optimization Technique For Corneal Reshaping During Laser Surgery

اسم المؤلف: نبراس حسين عائب
اسم المشرف: خالد احمد الجودي سومر متي ناسي
الموضوع العام: هندسة الميكانيك
السنة: 2014
الموضوع الدقيق: ديناميك موائع
الدرجة: دكتوراه
الجامعة: جامعة بغداد
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: جرى التحقق من التغيير في شكل القرنية حراريا بمساعدة منظومة ليزر لتعويض الاخطاء الانكسارية. شملت الدراسة صياغة نموذج رياضي للمسالة ببعد واحد مع تجارب عملية باستخدام المزدوجات الحرارية والكاميرا الحرارية. كانت درجة الحرارة القصوى المحسوبة من النموذج الرياض | A change in corneal shape assisted by laser system to compensate the refractive errors is investigated thermally. The investigation included a mathematical one dimensional model and experimental work using thermocouples and infrared camera. The maximum th

برنامج تعليمي لدراسة تاثير الشكل والابعاد والتقوية لانبوب التصريف في اسطوانات الضغط Instructional Program To Influence of The Shape And The Dimensions And The Reinforcement To Discharge Pipe on Cylindrical Pressure Where From The Stresses And The Strains Distribution

اسم المؤلف: محمد جواد محمد الخفاجي
اسم المشرف: طلال عبد الجبار عبد الوهاب خماس لعيبي شويع
السنة: 2007
الدرجة: ماجستير
اللغة: العربية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: يهدف البحث الحالي بناء برنامج تعليمي لدراسة تاثير الشكل والابعاد والتقوية لانبوب التصريف في اسطوانات الضغط من حيث توزيع الاجهادات والانفعالات. وتمت دراسة تاثير منطقة الاتصال بين انبوب التصريف والوعاء الاسطواني من خلال دراسة عدة عوامل منها شكل انبوب التصر | This research aim's for study of the influence of the shape, the dimensions and the reinforcement to discharge pipe on cylindrical pressure where from the stresses and the strains distribution, Where study was effect the connection area between the discha

امكانية استخدام التوربين ذو الضغط الخلفي في الصناعة النفطية العراقية

اسم المؤلف: كاظم حسن علي
اسم المشرف: محمد ناصر حميد مؤيد رزوقي حسن
الموضوع العام: هندسة الميكانيك
السنة: 2007
الموضوع الدقيق: هندسة الطاقة
الدرجة: ماجستير
اللغة: العربية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: لقد شهدت العقود الاخيرة من القرن الماضي تسارعا كبيرا في تطور المجالات الصناعية والتكنولوجية وفي مجال توليد الطاقة اضافة الى الاتجاه نحو بناء المحطات الصغيرة في الصناعات المختلفة لتلبية احتياج المستهلك الصناعي كل ذلك يتيح الفرصة لاستثمار مثل هكذا تطورات | The last decades of the century have witnessed great accelaration in developing the technology and industrial field, in the field of energy generation and the intention to build the samll power stations in different industries to fulfill the requirments o

تحسين اداء التبريد الغشائي لثقوب النفث باستخدام المنحدرات Enhancement of Film Cooling Performance By Using Ramped - Holes Injection

اسم المؤلف: فلاح فاخر حاتم الجابري
اسم المشرف: عاصم حميد يوسف الدراجي قتيبة جميل مهدي الخشالي
الموضوع العام: هندسة الميكانيك
السنة: 2014
الموضوع الدقيق: هندسة الميكانيك
الدرجة: دكتوراه
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: The effect of introducing ramps with cylindrical and conical holes on the film cooling performance has been investigated numerically and experimentally in the present study. A computational fluid dynamic code (FLUENT) has been used to predict the flow beh

تحليل الانبعاج الاهتزاز لصفائح مركبة طبقية Buckling And Vibration Analysis of Laminated Composite Plates

اسم المؤلف: فراس حميزة تايه
اسم المشرف: Widad I. Majeed
الموضوع العام: هندسة الميكانيك
السنة: 2014
الموضوع الدقيق: هندسة الميكانيك
الدرجة: ماجستير
الجامعة: جامعة بغداد
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: تمت دراسة الاهتزاز الحر والانبعاج للصفائح الرقيقة المركبة المكونة من طبقات المعرضة لاحمال منتظمة, منحنية, وخطية ضمن مستوي الصفيحة باستخدام نظرية الصفائح الطبقية الكلاسيكية (CLPT). ان موضوع هذا العمل هو دراسة صفائح مركبة تحت تاثير احمال انبعاج وايجاد الترد | Free vibration and buckling behavior of laminated composite thin plates subjected to in - plane uniform, parabolic, and linear distributed loads is studied using classical laminated plate theory (CLPT). The object of this work is to carry out a theoretica

تقييم الاداء لمبادل حراري مباشر ثلاثي الاطوار Performance Evaluation of Three Phase Spray Direct Contact Heat Exchanger

اسم المؤلف: فاطمة احمد عبد الخالق
اسم المشرف: Najim A. Jassim
الموضوع العام: هندسة الميكانيك
السنة: 2014
الموضوع الدقيق: هندسة الميكانيك
الدرجة: ماجستير
الجامعة: جامعة بغداد
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: يتناول البحث الحالي دراسة عملية لمبادل حراري مباشر ثلاثي الطور، لنظام (ماء - R11). حيث ان الماء هو الطور المستمر (السائل) وR11 (الغاز - السائل) هو الطور المتشتت. يتكون مقطع الاختبار من عمود اسطواني من الزجاج نوع (Perspex) بقطر داخلي 8 سم وطول 1?2 متر.، ال | The present investigation dealt with experimental study of three - phase direct - contact heat exchanger, for water - R11 system. Whereas water was the continuous phase (liquid) and R11 (liquid - gas) was the dispersed phase. The test section consisted of

تقليل الاعاقة للجريان المضطرب الاحادي والثنائي الطور في الانابيب باستخدام بوليمر نوع CMC Drag Reduction In Single And Two - Phase Turbulent Pipe Flow Using CMC Polymer

اسم المؤلف: عصام مجبل عبد
اسم المشرف: Sabah T. Ahmed
الموضوع العام: هندسة الميكانيك
السنة: 2007
الموضوع الدقيق: قوى حرارية
الدرجة: دكتوراه
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: ان تقليل الاعاقة ظاهرة فيزيائية تتضح بشكل واضح خلال الجريان المضطرب عند اضافة بوليمر للجريان ذات سلسلة طويلة. ان خاصية السلسلة الطويلة للبوليمر لها فائدة في تكسير الطبقة المتاخمة المتكونة عند سطح الانبوب خلال عملية الجريان. يمكن ان يقسم الجريان الى نوعين | Drag reduction is a physical phenomenon appears through turbulent flow due to polymer additive. The long chain of polymer destroyed the sublayer which normally growing through single and two - phase flows. The flow is divided into Newtonian flow (zero con

تحليل الانبعاج عمليا ونظريا لصفائح رقيقة مركبة طباقيا ذات شق Experimental And Theoretical Buckling Analysis of Cracked Laminated Composite Thin Plates

اسم المؤلف: عزيز درويش مجيد المواش
اسم المشرف: عدنان ناجي جميل
الموضوع العام: هندسة الميكانيك
السنة: 2014
الموضوع الدقيق: هندسة الميكانيك
الدرجة: ماجستير
الجامعة: جامعة بغداد
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: هذا البحث ركز بصورة رئيسية على سلوك الانبعاج للصفائح الرقيقة المركبة طباقيا ذات شق (شق طرفي اوداخلي) والمسلطة عليها احمال ستاتيكية. الاحمال الستاتيكية درست تحليليا وعمليا للصفائح الرقيقة المركبة طباقيا غير متشققة. كذلك درست عدديا وعمليا للصفائح الرق | This present work focused mainly on the buckling behavior of cracked laminated composite thin plates (edge or internal crack) subjected to static loads. The static loads have been studied analytical and experimental analysis for uncracked laminated compos

استخدام نظرية الضرر المتراكم في تقييم اعمار الكلال The Use of Cumulative Damage Theory In Evaluating Fatigue Life Time

اسم المؤلف: محمد خلوق ياسين
اسم المشرف: حسين جاسم العلكاوي
الموضوع العام: هندسة الميكانيك
السنة: 2006
الموضوع الدقيق: ميكانيك تطبيقي
الدرجة: ماجستير
اللغة: العربية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: في هذا البحث تمت دراسة ظاهرة الكلال لسبيكة الالمنيوم ذات الرمز (2024) تحت احمال انحنائية متعاكسة ثابتة ومتغيرة السعة وفي ظروف درجة حرارة الغرفة وتحت نسبة اجهاد (R= - 1) اتسم البحث بجانبين هما : - الجانب النظري : ويشمل مسحا للبحوث السابقة وبناء انموذج ر | Fatigue phenomenon for Aluminum alloy of symbol 2024 is studied in this work under constant and variable amplitudes reverse bending load at room temperature, with stress ratio (R) of ( - 1).This work is has two approaches Theoretical approaches which in

تحليل الاهتزاز في مولد منزلي بسيط Vibration Analysis of Simple Home Generator

اسم المؤلف: علاء عبد الهادي جبر
اسم المشرف: موفق علي توفيق
الموضوع العام: هندسة الميكانيك
السنة: 2008
الموضوع الدقيق: ميكانيك تطبيقي
الدرجة: ماجستير
اللغة: العربية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: يقدم البحث الحالي تحليلا لاهتزاز مولد كهربائي صغير يستعمل في اغلب المنازل العراقية من نوع (ASTRA 3000) يعطي قدرة كهربائية (2200 W) وقد تم التحليل باتباع طريقة المصفوفات الانتقالية، وبطبيعة الحال فان هذا المولد يتكون من نظام دوار وغلاف بدن وكراسي تحميل ل | This research presents an analysis for a vibration of a small electrical generator, which is widely used for a domestic purpose. This generator is of type (ASTRA 3000) that gives an electrical power up to (2200 W), The analysis is achieved by using the me

الخصائص الميكانيكية والبنية المجهرية على امتداد المقطع السميك في سبائك الالمنيوم T6 - 7075 الملحومة بالاحتكاك والمزج Mechanical And Microstructural Properties Along The Thick Section of Friction Stir Welded 7075 - T6 Aluminum Alloy

اسم المؤلف: دينا عبد الجليل رؤوف
اسم المشرف: قاسم محمد دوس
الموضوع العام: هندسة الميكانيك
السنة: 2014
الموضوع الدقيق: التصنيع
الدرجة: ماجستير
الجامعة: جامعة بغداد
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: ان الهدف من هذه الدراسة هو التحقق من امكانية تطبيق لحام الاحتكاك 7075 - ( بسمك ) 25 T بالخلط في وصل سبيكة الالومنيوم ذات المقاومة العالية ) 6 (Single باخرى مماثلة. طبقت العملية بطريقتي اللحام ذو التمريرة المفردة )mm باستخدام ماكنة )Double sided weld( والل | The present work investigates the feasibility of friction stir buttweld of a (25 mm) thickness of the high strength aluminum alloy 7075 - T6. Welds were made in single and double sided by using a conventional milling machine and special profiled tools. Su

دراسة نظرية وعملية لانتاج غاز الهيدروجين باستخدام الطاقة الشمسية Theoretical And Experimental Study of Using Solar Energy To Produce Hydrogen Gas

اسم المؤلف: حسن فخري محمد رسول
اسم المشرف: صباح طارق احمد
الموضوع العام: هندسة الميكانيك
السنة: 2008
الموضوع الدقيق: هندسة الطاقة
الدرجة: ماجستير
اللغة: العربية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: يتضمن هذا البحث دراسة نظرية وعملية عن امكانية استغلال الطاقة الشمسية في انتاج وتوليد غاز الهيدروجين الذي يعد احد الخيارات الرئيسة لاستعماله كمصدر للطاقة البديلة غير الملوثة للبيئة عند نضوب مصادر الوقود التقليدي. الدراسة النظرية تضمنت بناء وتطوير انموذج ر | In this work a theoretical and experimental study concern about the using of solar energy to produce Hydrogen gas as unpolluted alternative fuel.In the theoretical study, equations were obtained to calculate, the direction and the rate of solar radiation

دراسة عملية لاداء الاسطح الانتقائية المستخدمة في المجمعات الشمسية An Experimental Study of The Performance of Selective Surfaces That Used In Solar Collectors

اسم المؤلف: زينب بهجة كريم
اسم المشرف: طالب كشاش مرتضى قصي جهاد عبد الغفور
الموضوع العام: هندسة الميكانيك
السنة: 2012
الموضوع الدقيق: قوى حرارية
الدرجة: ماجستير
اللغة: العربية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: في هذا البحث تم اجراء دراسة عملية لاختبار الاداء الحراري لاسطح انتقائية مستخدمة في المجمعات الشمسية لاساس من الحديد والحديد المغلون والالمنيوم المتوفر تجاريا، حيث تم عمليا طلاء العينات بطريقتين هما الطلاء الكهربائي والرش الكيميائي الحراري. وتمت مقارنة ا | In this research an experimental study has done for testing the thermal performance of selective surfaces used in solar collectors for substrate of iron, galvanized iron and aluminum which are commercially available. The coating process for the samples ha

تحسين انتقال الحرارة بالحمل الحر باستخدام انبوب مزعنف مغمور داخل حيز مسخن Improvement on Heat Transfer By Natural Convection By Using Finned Tube Immersed In Heated Enclosure

اسم المؤلف: عامر جميل شريف
اسم المشرف: اخلاص محمد فياض
الموضوع العام: هندسة الميكانيك
السنة: 2008
الموضوع الدقيق: هندسة الطاقة
الدرجة: ماجستير
اللغة: العربية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: اجريت دراسة عملية على اربعة نماذج لانابيب المبادل حراري(انبوب املس,انبوب مزعنف غير مثقب,انبوب مزعنف مثقب بثقبين, انبوب مزعنف مثقب باربع ثقوب) مغمورة داخل وعاء مغلف وجهه المسخن نحو الاعلى, لمعرفة عملية انتقال الحرارة بالحمل الحر لمدى من زوايا ميل المغلف وت | Natural convection heat transfer from four models tube heat exchanger at four angle of inclination has been investigated experimentally to predict the effect of the following (finned tubes, perforated fins, number of perforation fin tube heat exchanger im

تاثير الاهتزاز المسلط على انتقال الحرارة بالحمل الحراري الحر في داخل غرفة مكعبة الشكل Natural Convection Heat Transfer In An Enclosed Vibration Cavity

اسم المؤلف: بيداء خليل خضير
اسم المشرف: عادل محمود صالح قيس عبد الامير الطائي
الموضوع العام: هندسة الميكانيك
السنة: 2014
الموضوع الدقيق: التبريد والتكييف
الدرجة: ماجستير
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: يقدم هذا البحث دراسة نظرية وعملية لانتقال الحرارة بالحمل الحراري المضطرب لاستقصاء تاثير الاهتزاز المكانيكي الخارجي المسلط على حيز مغلق مكعب الشكل (mm 120* mm 120* mm 120) وفي ظروف الجاذبية الارضية. النسبة باعية (نسبة ارتفاع الحيز الى طوله) تساوي واحد, يست | The theoretical and experimental study has been implemented to elucidate the effect of vertical mechanical vibration at normal gravity on the natural convection in a cubic enclosure (L=120mm) filled with air as working fluid at Rayleigh number 7*?10?^7and

تصنيع وتقييم اداء منظومة تعقب للشمس ملحقة بمركز للاشعاع الشمسي من النوع الاسطواني Manufacture And Evaluation The Performance of Sun Tracking System Attached To The Parabolic Trough Type Concentrated Solar Collector

اسم المؤلف: خليل سليم جبر
اسم المشرف: قصي جهاد عبد الغفور
الموضوع العام: هندسة الميكانيك
السنة: 2012
الموضوع الدقيق: التبريد والتكييف
الدرجة: ماجستير
اللغة: العربية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: تم في هذا البحث تصميم وتصنيع ودراسة اداء منظومة تركيز للاشعاع الشمسي من النوع الاسطواني مزودة بمنظومة الكترونية لتعقب الشمس.تكونت المنظومة من جزئين هما : 1. الجزء الميكانيكي : - والذي يتكون من هيكل حديدي ثابت لحمل الهيكل المتحرك. تم تثبيت عاكس من النيكل | In this work a cylindrical solar concentrated collector with an electronic tracking system is designed, manufactured and study the performance of experimental performance study for it is also made.The system was consisting of two parts : 1. The mechanic

فشل الكلال بعدد دورات منخفض (LCF) لسبيكة الالمنيوم متوسطة المقاومة نوع 7020 عند معاملات حرارية مختلفة Low Cycle Fatigue Failure of Medium Strength Aluminum Alloy 7020 At Different Heat Treatments

اسم المؤلف: مازن محمود يحيى
اسم المشرف: شاكر سكران حسن عدنان نعمة عبود
الموضوع العام: هندسة الميكانيك
السنة: 2009
الموضوع الدقيق: هندسة الميكانيك
الدرجة: ماجستير
اللغة: العربية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: اشتمل البحث على اختبار فشل الكلال بعدد دورات منخفض (LCF) لسبيكة الالمنيوم AA7020 بحالاته الثلاث، التخمير والتعتيق الطبيعي والتعتيق الصناعي. اجري الاختبار على عينات قياسية من النوع المسند من جهة واحدة (Cantilever Beam) لبيان التاثير المشترك للاجهاد ا | The present work encompasses Low Cycle Fatigue (LCF) of the Al - alloy AA7020 with three conditions; annealing, natural aging and artificial aging. The LCF tests carried out using standard specimens cantilever beam types.Optical Light Microscope (OLM) an

تحليل نموذج للكشف عن التبطين في لوحات الصفائح المركبة Modal Analysis For Delamination Detection In Composite Laminated Plates

اسم المؤلف: باسم جميل حمود
اسم المشرف: نبيل حسن هادي
الموضوع العام: هندسة الميكانيك
السنة: 2014
الموضوع الدقيق: هندسة الميكانيك
الدرجة: ماجستير
الجامعة: جامعة بغداد
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: كشف وتحديد الضرر في الهياكل جزء مهم في مراقبه وتصليح الانظمة الهيكلية اثناء الخدمة، مما اجتذب اهتمامنا نحو دراسه نمذجه وتحليل الاهتزازات للصفائح الهيكلية المتضررة.العيوب التصنيعية تسبب تغير بالخصائص الديناميكية للهياكل والتي تشمل التغير في تردداتها الطبي | Detection and determination of damage in the structures is considered as an important part in watching and repairing of structural systems during the service. The manufacturing defects cause changes in the dynamic characteristics of the structures includi

دراسة سلوك الكلال تحت احمال ثنائية المحور لمادة بوليميرية مدعمة بالالياف عمليا وباستخدام الطرق العددية Investigation of Biaxial Fatigue Behavior of Fiber Reinforced Plastic Using Experimental And Numerical Techniques

اسم المؤلف: ياسر يعرب قحطان
اسم المشرف: محسن جبر جويج شاكر سكران حسن
الموضوع العام: هندسة الميكانيك
السنة: 2014
الموضوع الدقيق: هندسة الميكانيك
الدرجة: دكتوراه
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: ان البحث الحالي درس عدديا وعمليا تصرف المواد المصنوعة من الياف الكاربون والالياف الزجاجية المدمجة بواسطة المادة الرابطة البوليميرية (ايبوكسي) اثناء الاحمال التكرارية (الكلال) الثنائية المحور (Biaxial) بواسطة تسليط حمل من نوع شد - شد. هذا العمل احتوى على | The present work studied numerically and experimentally the fatigue behavior of carbon fiber reinforced polymer (CFRP) and glass fiber reinforced polymer (GFRP) with different numbers of layers under a biaxial loading of tension - tension. This work inclu

دراسة عملية ونظرية لتاثيرات ابعاد الانابيب في المنظومات الهيدروليكية Experimental And Theoretical Study of The Influences of Pipes Sizing on The Hydraulic Systems

اسم المؤلف: عبد الكريم سوادي صالح
اسم المشرف: جعفر مهدي حسن
الموضوع العام: هندسة الميكانيك
السنة: 2008
الموضوع الدقيق: هندسة الميكانيك
الدرجة: ماجستير
اللغة: العربية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: تضمنت هذه الدراسة تصميم وتنفيذ منظومة هيدروليكية اساسية ذات حمل متغير وتتكون من خزان ومضخة ومحرك كهربائي وصمام اتجاهي وصمامات تحكم بالضغط والتدفق ومستخدم فضلا عن ملحقات اخرى، لغرض دراسة تاثيرات ابعاد الانابيب(القطر والطول والسمك) في المنظومات الهيدروليكي | The present work is conducted to design and built up hydraulic control system with external variable load contains (tank, pump, electric motor, directional value, relief valve, throttle valve, and accessories) to study the influences of pipe size (length,

دراسة عددية وتجريبية لاداء توربين - المدخنة الشمسية Numerical And Experimental Study of Turbine - Solar Chimney Performance

اسم المؤلف: عباس جاسم جبير
اسم المشرف: اركان خلخال حسين الطائي وحيد شاتي محمد
الموضوع العام: هندسة الميكانيك
السنة: 2014
الموضوع الدقيق: قوى حرارية
الدرجة: دكتوراه
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: تم في هذه الدراسة اجراء محاكاة عددية وتقييم اداء محطة المدخنة الشمسية التجريبية في مدينة بغداد. تم نمذجة المحطة باستخدام برنامج Fluent والذي يعمل على اساس العناصر المحددة, وذلك لحل المعادلات الحاكمة (الاستمرارية, Naver - Stockes, الطاقة والاشعاع ) من خلال | Numerical simulation and performance evaluation for pilot plant solar chimney oriented in Baghdad city have been carried out in this work. A finite volume modeling technique is used to cast the governing equations [i.e.,continuity, Naver - stockes, energy

تحسين المواصفات الميكانيكية لسبيكة (Cu - Zn - Al) القادرة على استعادة شكلها بعد التشوه Enhancing The Mechanical Properties of Cu - Zn - Al Shape Memory Alloy

اسم المؤلف: صلاح نوري عبود النعماني
اسم المشرف: ظافر الفتال عبد الواحد راجح
الموضوع العام: هندسة الميكانيك
السنة: 2014
الموضوع الدقيق: هندسة الميكانيك
الدرجة: دكتوراه
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: ان زيادة الطلب على تطوير بعض المواد لاستخدامها في صناعات الفضاء والصناعات الطبية العسكرية، تتطلب دراسات واسعة النطاق لتعزيز مثل هذه المواد وخاصة السبائك الذكية القادرة على استعادة شكلها. وتلقى سبائك النحاس الذكية اهتماما واسعا نظرا للتطبيقات الهامة وانخفا | The increased demand for the development of certain materials to be used in aerospace, military and medical industries justifies the execution of an extensive investigation to enhance the properties of such materials, especially the shape memory alloys (S

خصائص سبيكة الالمنيوم - سليكون مقواة بدقائق سيراميكية Characteristic Analysis of An Aluminum - Silicon Base Alloy With Nano Particulate Ceramic Reinforcement

اسم المؤلف: رونق احمد محمد
اسم المشرف: ابتهال عبد الرزاق محمود عدنان داود محمد
الموضوع العام: هندسة الميكانيك
السنة: 2014
الموضوع الدقيق: هندسة الميكانيك
الدرجة: دكتوراه
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: تستخدم سبائك الالمنيوم المتراكبة بدقائق الالومينا سواء كانت مايكروية او نانوية في نطاق واسع في تطبيقات عالية الاداء كالسيارات العسكرية والصناعات الفضائية والكهربائية بسبب امكانية تحسين خواصها الفيزياوية. تم تحضيرسبيكة A332 ثم اضيفت الدقائق المايكروية وال | Aluminium matrix composites (AMC) reinforced with micro and nano - sized Al2O3 particles are widely used for high performance applications, such as automotive, military, aerospace and electrical industries because of their improved physical and mechanical

An Investigation on The Combustion And Emissions Characteristics of (HSDI) Diesel Engine Fueled With Diesel, Biodiesel And Heavy Fuel Oil

اسم المؤلف: حيدر عبد ضهد
اسم المشرف: Ekhlas M. Alfayyadh Mohammed ali Abdulhadi
الموضوع العام: هندسة الميكانيك
السنة: 2014
الموضوع الدقيق: هندسة الميكانيك
الدرجة: دكتوراه
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: In this study, an investigation was carried out on the combustion, regulated gases emissions, unregulated gases emissions and particulate matter emissions characteristics in a high speed direct injection (HSDI) diesel engine fueled with rapeseed methyl es

تحليل الاجهادات في صفيحة رقيقة تحتوي على شق سطحي معرضة الى حمل صدمة متكرر Stress Analysis In Thin Plate With Surface Crack Subjected To Cyclic Impact Loading

اسم المؤلف: بسام علي احمد
اسم المشرف: فتحي عبد الصاحب الشماع
الموضوع العام: هندسة الميكانيك
السنة: 2014
الموضوع الدقيق: ميكانيك تطبيقي
الدرجة: ماجستير
الجامعة: جامعة بغداد
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: في هذا العمل.. تم دراسة وتحليل الاجهادات وحركة نمو الشق لصفائح رقيقه ومستويه تحتوي على شق سطحي في وسطها ومعرضه لحمل صدمه متكرر ذات سرعه منخفضه ولنوعين من سبائك الالمنيوم (2024,6061). حيث تم استخدام ثلاثة طرق رئيسية : الحل التحليلي وذلك باستخدام النظرية | In this work, the stresses and dynamic crack growth were studied and analyzed in thin flat plate with a surface crack at the center, subjected to cycling low velocity impact loading for two types of aluminum plates (2024, 6061). Three main methods have b

تاثير الحقن المباشر في الخواص الديناهوائية لمقاطع الاجنحة ذات العتبات المواجهة للخلف Effect of Direct Injection on The Aerodynamics Characteristics of Airfoils With Backward Facing Steps

اسم المؤلف: احسان زيدان سالم الابيض
اسم المشرف: محمد ادريس ابو طبيخ
الموضوع العام: هندسة الميكانيك
السنة: 2008
الموضوع الدقيق: ديناميك موائع
الدرجة: ماجستير
اللغة: العربية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: يتضمن هذا البحث دراسة تاثير الحقن المباشر داخل العتبة على خواص القوى الديناهوائية للاجنحة ذات العتبات المواجهة للخلف (Backward Facing Step). تم اجراء الاختبار على مقاطع الاجنحة عمليا باعتماد النفق الهوائي ذي السرع الواطئة (Low - Speed Wind Tunnel) للحصول | An experimental and theoretical investigations were performed to study the effect of direct injection of air on aerodynamic characteristics of airfoils with backward facing steps. Laboratory experiments were done in a low - speed wind tunnel in order to o

تاثير الفجوة بين مطيار واسطوانة دوارة على اداء المطيار Effect of Gap Between Airfoil And Embedded Rotating Cylinder on Airfoil Performance

اسم المؤلف: مصطفى فالح حسن
اسم المشرف: نجدت نشات عبد الله
الموضوع العام: هندسة الميكانيك
السنة: 2014
الموضوع الدقيق: هندسة الميكانيك
الدرجة: ماجستير
الجامعة: جامعة بغداد
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: هذه الدراسة توضح تاثير الفجوة بين الجناح والاسطوانة الدوارة على اداء الجناح عمليا ونظريا.اعتمدت الدراسة النظرية لجريان ثنائي الابعاد لقيم عدد رينولدز (700,000) بالاعتماد على طول الوتر لجناح متناظر (NACA 0012) وجناح غير تقليدي NACA 0012) يحتوي في مقدمته ع | The present study explores the effect of the gap between the airfoil and a rotating cylinder embedded on leading edge of the airfoil on its aerodynamic performance theoretically and experimentally.Numerically, two - dimensional turbulent flows with Reyno

تكامل منظومة الملاحة INS/DGPS) (لمرحلة هبوط الطائرة Integration of (INS/DGPS) System For Airplane Landing Phase

اسم المؤلف: هدى ناجي عبد الرضا
اسم المشرف: فرج محل محمد سمير عبد الخالق عزيز
السنة: 2014
الموضوع الدقيق: الهندسة الكهروميكانيكية
الدرجة: ماجستير
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: تستخدم على نحو متزايد في )INS( ومنظومة الملاحة )GPS( منظومة تحديد الموقع العالمي مجموعة واسعة من التطبيقات. منظومة تحديد الموقع العالمي هو نظام الملاحة الذي يوفر درجة الاشارات على الاقل )GPS( عالية من دقة تحديد الموقع وتقدير السرعة للمستخدم. يتلقى مستلم م | Global positioning system (GPS) and Inertial Navigation System (INS) are increasingly used for positioning and attitude determination in a wide range of applications. The GPS is a navigation system which provides highly accurate position and velocity esti

تحسين انتقال الحرارة باستخدام الشريط الملتوي Enhancement of Heat Transfer Using Twisted Tape

اسم المؤلف: اسامة ثامر حسين
اسم المشرف: قاسم جبار سليمان
الموضوع العام: هندسة الميكانيك
السنة: 2014
الموضوع الدقيق: هندسة الميكانيك
الدرجة: ماجستير
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: تقنية تحسين انتقال الحرارة تشير الى عدة طرق مستخدمة لزيادة نسبة انتقال الحرارة بدون التاثير على كفاءة المنظومة وھذا التقنية تقسم الى ثلاثه اقسام ھي( نشيط وسلبي والمركب).تم استخدام ثلاث طرق لتعزيز انتقال الحرارة باستخدام مسببات شدة الاضطراب وذلك من اجل زي | Heat transfer enhancement techniques refer to different methods used to increase rate of heat transfer without affecting much the overall performance of the system. These techniques broadly are of three types. passive, active and compound techniques.Thre

التحقيق في ديناميك المرونة الهوائية والكشف عن الشقوق في ريشة توربين رياح متصدعة Investigation Into Dynamic Aeroelasticity And Crack Detection of A Cracked Wind Turbine Blade

اسم المؤلف: فاروق عمر حمدون
اسم المشرف: موفق علي توفيق محمد ادريس ابو طبيخ
الموضوع العام: هندسة الميكانيك
السنة: 2014
الموضوع الدقيق: هندسة الميكانيك
الدرجة: دكتوراه
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: يتضمن البحث الحالي جزئين رئيسيين. يبدا الجزء الاول بتطوير نموذج عددي للتحقيق في اثار حجم وموقع الشق على سلوك المرونة الهوائية للريشة في ظل ظروف مختلفة للرياح. تهدف الدراسة الحالية الى ايجاد حل فعال وسريع فيما يتعلق بالتكلفة الحسابية والتعقيد الرياضي المتا | The present research is divided into two parts. The first part starts with developing a numerical model for investigating the effects of crack size and location on the blade aeroelastic behavior under different wind conditions. The purpose of this study i

دراسة وتصميم براد يعمل بالطاقة الشمسية بطريقة الامتزاز المتقطع Study And Design An Intermittent Solar Energy Adsorption Cooler

اسم المؤلف: فاضل عباس عاصي
اسم المشرف: خالد احمد الجودي عصام محمد علي
الموضوع العام: هندسة الميكانيك
السنة: 2014
الموضوع الدقيق: هندسة الميكانيك
الدرجة: ماجستير
الجامعة: جامعة بغداد
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: يركز هذا البحث على واحدة من الطرق المستدامة لخفض الطلب على طاقة التبريد وهو نظام التبريد بالامتزاز المعتمد على الطاقة الشمسية (solar - powered adsorption cooling system), كما تقوم هذه الدراسة بالتحليل النظري والعملي لثلاجة شمسية تعمل بمبدا الامتزاز المتقط | This work is focused on one of the sustainable ways to decrease energy demand for cooling which is the solar - powered adsorption cooling system. This study presents a theoretical and experimental analysis of an intermittent solar assisted adsorption refr

دراسة عملية لتاثير الاهتزازات القسرية الشاقولية في معامل انتقال الحرارة بالحمل الحر من صفيحة مستوية مسخنة نحو الاعلى Experimental Study of The Effect of Vertical Forced Vibrations on Natural Convection Heat Transfer Coefficient From Flat Plate Heated Upward

اسم المؤلف: عبد الحميد رافع سرحان
اسم المشرف: زينة خليفة كاظم
الموضوع العام: هندسة الميكانيك
السنة: 2009
الموضوع الدقيق: التبريد والتكييف
الدرجة: ماجستير
اللغة: العربية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: يهدف البحث الى اجراء دراسة عملية لبيان تاثير الاهتزازات القسرية الشاقولية في معامل انتقال الحرارة بالحمل الحر من صفيحة مصنعة من الالمنيوم بابعاد (mm 300 Length*100 Width*3 thickness)، سخنت الصفيحة بفيض حراري ثابت نحو الاعلى يتراوح بين (1500 - 250 ).اجريت | The aim of this work is to perform an experimental study for the effect of forced vertical vibrations on free convection heat transfer coefficient, from flat plate made of Aluminum with dimension (300 Length*100 Width *3 thickness mm).It has been heated u

دراسة نظرية وعملية لمقطر شمسي احادي الحوض ذو مادة خزن متغير الطور Theoretical And Experimental Investigation of Single Basin Solar Still With Pcm Storage Medium

اسم المؤلف: ضرغام ابراهيم حسين
اسم المشرف: سعد محسن المشاط
الموضوع العام: هندسة الميكانيك
السنة: 2014
الموضوع الدقيق: قوى حرارية
الدرجة: ماجستير
الجامعة: جامعة بغداد
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: البحث الحالي هو دراسة نظرية وعملية لاداء مقطر شمسي نوع احادي الحوض احادي الميل مع استخدام شمع البرافيين (Paraffin wax ) وحامض الشمع (Stearic acid ) كمواد متغيرة الطور.تم اجراء الدراسة في محافظة ميسان (جنوب العراق خط عرض 31.5? وخط طول 47.8?) لاختبار تاثير | The present work is a theoretical and experimental investigation on the performance of a solar still type single slope single basin with Stearic acid (SA) and Paraffin Wax (PW) as phase change materials (PCM) storage medium.The work was carried out in Mi

الامثلية العملية والعددية لقدم صناعي مصنوع من مواد مركبة Experimental And Numerical Analysis of Composite Materials Prosthesis Foot

اسم المؤلف: حسن سعد محمد
اسم المشرف: مجيد حبيب فيض الله
الموضوع العام: هندسة الميكانيك
السنة: 2014
الموضوع الدقيق: ميكانيك تطبيقي
الدرجة: ماجستير
الجامعة: جامعة بغداد
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: هذه الرسالة تتعلق بتطوير نوعين من المواد المركبة يمكن استخدامها في تصنيع الاقدام الصناعية للوصول الى التصميم الامثل بتكلفة واطئة وتكون مقبولة الخواص الميكانيكية. حيث تلقى دراسة خشب النخيل وتاثيرها على الخواص الميكانيكية للبولي ايثلين القليل من الاهتمام من | This dissertation concerns developing two types of composite materials, which can be used in manufacturing the optimal design prosthetic foot with a reasonable cost and satisficing mechanical properties accepted. The study of date palm wood and his effect

دراسة عددية لتوزيع سرعة ودرجة حرارة الهواء بواسطة التهوية النزوحية Numerical Study of Air Velocity And Temperature Distribution By Displacement Ventilation

اسم المؤلف: قاسم حمودي حسان
اسم المشرف: صباح طارق احمد علاء عباس مهدي
الموضوع العام: هندسة الميكانيك
السنة: 2014
الموضوع الدقيق: هندسة الميكانيك
الدرجة: ماجستير
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: استخدمت احد الطرائق الحسابية (CFD) لمحاكاة توزيع سرعة ودرجة الحرارة لنظام تھوية نزوحي ثلاثي الابعاد وفقا للمناخ العراقي. ھذه الدراسة شملت حل المعادلات التفاضلية الجزئية (PDE's) الحاكمة لحفظ الكتلة، الزخم، الطاقة، الطاقة المضطربة ومعدل ضياعھا. طريقة الفرو | In this study, a computational fluid dynamics (CFD) was used to simulate air velocity and temperature distribution fields for a three dimensional displacement ventilation system. This study involved the solution of partial differential equations for the c

خواص الديناميكا الهوائية لمنظومة مطيار متعدد الاجزاء مع تاثيرات الارضية Aerodynamic Characteristics of Multi - Element Airfoil System With Ground Effects

اسم المؤلف: انمار حامد علي
اسم المشرف: احسان يحيى حسين
الموضوع العام: هندسة الميكانيك
السنة: 2014
الموضوع الدقيق: ديناميك موائع
الدرجة: دكتوراه
الجامعة: جامعة بغداد
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: يقدم البحث الحالي دراسة نظرية وعملية للخصائص الديناميكية الهوائية ومجال الجريان حول مطيار احادي واخر متعدد الاجزاء بوجود التاثيرات الارضية او عدمها.في هذا العمل تم استخدام ثلاثة طرق عددية لدراسة تاثير تقارب المطيار GAW - 1 الاحادي والمتعدد الاجزاء من الا | Aerodynamic characteristics and flow field around single and multi - element airfoil (MEA) with and without the ground effects had been investigated numerically and experimentally in the present work.The numerical inviscid and approximate boundary layer

التحليل الايروديناميكي والتصميم الامثل لريشة التوربينات الهوائية افقية المحور مع جنيح Aerodynamic Analysis And Optimum Blade Design of HAWT Rotor With Winglet

اسم المؤلف: ياسر مظفر شكارة
اسم المشرف: اخلاص محمد فياض صادق حسين باخي
الموضوع العام: هندسة الميكانيك
السنة: 2014
الموضوع الدقيق: هندسة الميكانيك
الدرجة: ماجستير
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: اظھرت محاكاة تداخل الجريان مع الھيكل زيادة تشوه الريشة بمقدار (% 11.2 الى 13.6% ), الجھد بمقدار (% 12.1 الى % 19.4 ) والاجھاد المرن بمقدار 10.8 الى 19.1% ) للريشة مع الجنيح على حساب الريشة مقطوعة القمة. كان التوافق بين النتائج.( النظرية والعملية جيد وبمق | To enhance the extracted power from a wind turbine rotor, numerical and experimental studies were carried out to investigate the aerodynamic shape optimization of horizontal axis wind turbine (HAWT) blade and the effect of tip blade modification. In this

التحريات التجريبية والنظرية للسيطرة على انظمة الصمامات الموازرة الكهروهيدروليكية Experimental And Theoretical Investigation For Electro - Hydraugoc Servovalve Systems Control

اسم المؤلف: احمد فؤاد مهدي كريدي
اسم المشرف: جعفر مهدي حسن ماجد احمد عليوي
الموضوع العام: هندسة الميكانيك
السنة: 2014
الموضوع الدقيق: هندسة الميكانيك
الدرجة: دكتوراه
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: The control concept on the electro - hydraulic servovalve system focuses on the pressure control, position control and velocity control. The servovalve and the system components are needed to be considered in the proposed control strategy. The control con

تطوير الخواص الميكانيكية للمواد البوليمرية النانوية المتراكبة Improvement of Mechanical Properties of Polymeric Nano - Composites

اسم المؤلف: اخلاص عيدان قادر
اسم المشرف: ابتهال النعيمي عدنان نعمة عبود
الموضوع العام: هندسة الميكانيك
السنة: 2014
الموضوع الدقيق: ميكانيك تطبيقي
الدرجة: دكتوراه
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: حظى الايبوكسى كمادة بوليمرية باهتمام واسع في صناعة الهياكل والصناعات الكهربائية فضلا عن استخدامه فى الصناعات البحرية. ولتوسيع مجال استخدامه والتغمب عمى هشاشيته اضيفت اليه العديد من المواد. ساعدت اضافة البولى سمفيد فى زيادة مقاومة الصدمة, الا ان اضافته قمم | Epoxies as a thermoset polymer gained a considerable attention in structural, electrical, and marine applications. To widen their usage and overcome their brittleness, many polymers were blended with it. The addition of Polysulfide rubber helps in increas

النمذجة لعملية مسك ثلاثية الابعاد ليد صناعية تحت ظروف تحمل ديناميكية Modeling of 3D Grasping of Artificial Hand Under Dynamic Load

اسم المؤلف: احسان عبد الحسين باقر
اسم المشرف: سومر متي ناسي موفق علي توفيق
الموضوع العام: هندسة الميكانيك
السنة: 2014
الموضوع الدقيق: هندسة الميكانيك
الدرجة: دكتوراه
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: توجه الباحثون نحو دراسة النموذج البشري في التعامل مع المهام تحت ظروف غير معرفة مسبقا، وشمل ذلك دراسة النظام الحسي والعصبي المتحكم بعملية المسك والتحريك ووظائف اخرى تقوم بها اليد البشرية. هذا ما ادى الى ظهور ما يسمى بتقنيات الذكاء الصناعي وبالخصوص الشبكات | Researchers have been directed towards the study of human strategy in treating with the tasks under undefined conditions previously, these researches included the sensory and nervous systems which are controlling the grasping and manipulation process and

نظام التبريد الارضي مع منظومة تهوية لازالة الرطوبة Radiant Cooling Floor System Integrated With Dehumidified Ventelation

اسم المؤلف: محمد حسين شريف امين
اسم المشرف: طالب كشاش مرتضى حسنين محمد حسين
الموضوع العام: هندسة الميكانيك
السنة: 2014
الموضوع الدقيق: التبريد والتكييف
الدرجة: ماجستير
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: في هذا البحث تم عمل تحليل عملي ونظري لدراسة توزيع درجات الحرارة لحيز مكيف بنظام التبريد الارضي والمزود بجهاز مزيل للرطوبة.اجريت التجارب على نموذج مصغر لغرفة بابعاد (0.75m?0.75m?1m)، والذي بني على اساس مقياس رسم مناسب هو (1\4) لمحاكاة توزيع درجات | In this research an experimental and numerical analysis is achieved for analysis panel shape of radiant cooling floor system with dehumidified ventilation.The experiments were done on a model room with dimensions of (1m?0.75m?0.75m) that was built accord

تاثير السفع بالكرات على الخواص الميكانيكية وحد التحمل للمواد المركبة Effect of Shot Peening on Mechanical Properties And Endurance Limit of Composite Materials

اسم المؤلف: مهدي نعمان مسلم شريف
اسم المشرف: احمد نايف ابراهيم الخزرجي
الموضوع العام: هندسة الميكانيك
السنة: 2014
الموضوع الدقيق: ميكانيك تطبيقي
الدرجة: ماجستير
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: This work investigated the effect of shot peening on the mechanical properties and fatigue life at stress ratio of = ?1 using alternating bending fatigue testing for two types of composite materials at room temperature.The used composite material was man

تقييم السلوك الديناميكي للاعمده المتعددة الاقراص والمحامل الزيتية Evaluating The Dynamical Behavior of Multidisc - Journal Bearing Rotors

اسم المؤلف: زينب محمد هويدي
اسم المشرف: محسن جبر جويج
الموضوع العام: هندسة الميكانيك
السنة: 2014
الموضوع الدقيق: هندسة الميكانيك
الدرجة: ماجستير
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: في معظم التطبيقات الصناعيه المكائن الدواره تتالف من اكثر من قرص واحد مثبت على العمود, هذا يجعل التنبو الدقيق للتصرفات الديناميكيه للاعمده الدواره المتعددة الاقراص والمسنده على المحامل مهم جدا لضمان العمل بكفاءة وفعالية. التصرفات الديناميكيه للاعمده الدوا | In most of applications, the rotor dynamics system consists of more than one disc which are mounted on shafts, accurate prediction of dynamic behavior of multi - disc rotor system is very important to ensure the efficient and effective working of rotor.T
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