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النظام الناصح للتجارة الالكترونية == Recommender System for E - Commerce Data

اسم المؤلف: اسيل باسم صبري يعقوب الطائي
اسم المشرف: طه سعدون باشاغا
الموضوع العام: علوم الحاسبات
السنة: 2004
الموضوع الدقيق: علوم الحاسبات
الدرجة: ماجستير
اللغة: الانكليزية
مكان الجامعة: بغداد
الكلمات الدلالية:
  • Recommender system
  • Recommendation methods
  • E - commerce
  • Data mining
  • Rating
  • Collaborative filtering
  • User based
  • Item based
  • Internet
  • Web site
الصفحات الاولى:
المستخلص: لقد غيرت ثورة الانترنيت العالم باسره فاصبح قرية صغيرة وصار بامكان اي شخص في اي مكان ان يطوف العالم باسره وهو جالس امام شاشة الكومبيوتر. من هنا ظهر الشراء والبيع عن طريق الانترنيت او ما يعرف الان بالتجارة الالكترونية (E - commerce).هذا التوسع خلق مشكلة جديدة وهي صعوبة الاختيار. فصار الزبون يشعر بالحيرة حينما يريد ان يختار حاجة ما اذ انه امام الاف المواقع التي توفر الحاجة التي يريدها وكل موقع منها يعرض اشكالا وانواعا مختلفة للحاجة الواحدة. من هنا ظهرت الحاجة لتقنية جديدة تتمثل اليوم في الانظمة الناصحة.اننا في كثير من الاحيان نقوم بعمل ما دون ان نملك الخبرة الكافية للقيام به. وفي حياتنا اليومية كلنا يعتمد من وقت لاخر على نصائح مختلفة اما من ناس يخبروننا بها او عن طريق وسائل الاعلام المختلفة او من مسؤولين عن الخدمات العامة.النظام الناصح يساعد وينمي هذه العملية الطبيعية التي نقوم بها يوميا في مجتمعاتنا. في النظام الناصح يدخل المستخدمون نصائحهم فيقوم النظام بجمعها وتوجيهها الى المتلقي. يعمل النظام الناصح بان يسالك سلسلة من الاسئلة عن الاشياء التي تحبها والتي لا تحبها. ثم يقارن اجاباتك باجابات زبائن غيرك ومن خلال هذه المقارنة يجد اقرب الزبائن اليك من خلال الشبه في الاراء. وبهذا ينصحك بما يحب الزبون القريب منك.في هذه الاطروحة تم بناء نظام ناصح يعتمد على مجموعة من الطرق لكي يقدم النصائح للمستخدمين. | The Internet revolution changed the world and made it as a small village, since everyone can contact people anywhere in the world. This easy communication facilitates selling and buying through the Internet which is called e - commerce.When e - commerce began to grow, problems appeared, one of them is how to buy something from a huge category, i.e. when a customer wants to buy something from internet markets, he will be confused what to choose and from where, because of the various items and enormous sites. People handle this information overload through their own effort, the effort of others and some blind luck. First of all, most items and information are removed from the stream simply because they are either inaccessible or invisible to the user. Second, a large amount of filtering is done for us. Newspaper editors select what articles their readers want to read. Bookstores decide what books to carry. However with the dawn of the electronic information age, this barrier will become less and less a factor. Finally, we rely on friends and other people whose judgement we trust to make recommendations to us. A technology is needed to help people wade through all the information to find the items they really want and need, and to rid them of the things they do not want to be bothered with.Recommender systems are the new technology that assist and augment the recommendation process. In a typical recommender system people provide recommendations as inputs, which the system then aggregates and directs to appropriate recipients.In this work, a recommender system is built that uses different recommendation methods.

الكبس الضمني للصور المتسلسلة باستخدام الانظمة الموزعة == Interframe Compression using Distributed Systems

اسم المؤلف: ضياء عيدان جبر
اسم المشرف: لؤي ادور جورج | فينوس وزير سماوي
الموضوع العام: علوم الحاسبات
السنة: 2005
الموضوع الدقيق: علوم الحاسبات
الدرجة: ماجستير
الجامعة: جامعة النهرين
اللغة: الانكليزية
مكان الجامعة: بغداد
الكلمات الدلالية:
  • Video Coding
  • Video Compression
  • Image Compression
  • Lossy Compression
  • Lossless Compression
  • Video Frames
  • Intra Frame Compression
  • Inter Frame Compression
  • Fractal Coding
  • Fractal Compression
  • Fractal Image Compression FIC
  • Discrete Cosine Tra
الصفحات الاولى:
المستخلص: هناك بديلان رئيسان لضغط الفيديو, الاول عادة يدعى الانترافريم (intraframe approach) ويعمل على ازالة تكرارات السباشيال(spatial redundancy) الموجودة في الصورة وبدون التاثير على المعلومات الهامة. هذه الطرق مناسبة لتطبيقات الصورة الثابتة مثل الوسائط المتعددة (multimedia), قواعد البيانات الصورية, الترميز الفوتغرافي، الخ. في التطبيقات التي تستخدم الصور المتتابعة, البيانات التلفازية, الخ. من الممكن ازالة تكرارات التيمبورال (Temporal redundancy) لتحقيق الزيادة في نسبة الضغط ولهذا السبب فان الصور الفيديوية المتتابعة عادة مترابطة بشكل كبير. المجموعة الثانية من هذه الطرق تدعى الانتيرفريم (interframe approach) وهي تعمل على حذف تكرارات التيمبورال (temporal redundancy). في المجموعة الثانية يتم حساب تخمين الحركة (motion estimation) للصور الفيديوية المتسلسلة. في النظام المعتمد تم اعتماد الانتيرفريم (interframe approach).في حقل تخمين الحركة (motion estimation) لضغط الفيديو هناك تقنيات كثيرة مطبقة في هذا المجال. ان تخمين الحركة الكتلي (Block based motion estimation) من اكثر طرق العمل المطبقة في مختلف الخوارزميات. خوارزمية البحث الكامل (Full Search Algorithm) توفر افضل انجازية ولكنها ذات كلفة حسابية كبيرة. لتقليل متطلبات الحساب, هناك خوارزميات بحث سريعة قد تم تطويرها ومنها خوارزمية الخطوات الثلاث (Three Step Algorithm). في النظام المعتمد, طريقة البحث الزمني الاني (Once Time Search), وطريقة بحث الخطوات الثلاث (Three Step Search) قد تم تنفيذها في مجال تخمين الحركة بالاضافة الى الطريقة الهجينة المطورة الجديدة (Hybrid Method).مجموعة طرق (interframe approach) تنتقي عدد من الصور الفيديوية التي يتم ضغطها باستخدام نظام ضغط يكون مختلفا عن تقنيات تخمين الحركة, هذه الصور الفيديوية المنتقاة تدعى صور المرساة الفيديوية (Anchor Frames). في النظام المعتمد هناك نموذجان قد تم تطويرهما لغرض ضغط الفيديو، في النموذج الاول تم تطوير نظام ضغط يعتمد على تحويل الجيب تمام المسرع (FDCT) الذي هو عبارة عن اشتقاق جديد لتحويل الجيب تمام التقليدي (DCT), وقد تم توثيق هذا الاشتقاق بشكل كامل في العمل المعتمد, اما النموذج الثاني فقد تم من خلاله تطوير نظام ضغط الترميز الجزيئي (Fractal Coding) المستخدم لضغط صور المرساة الفيديوية. من السلبيات الموجودة في الترميز الجزيئي هو الوقت المكلف الذي يحتاجه لاكمال البحث المطلوب. هذه المشكلة قد تم معالجتها في النظام المعتمد من خلال تسريع البحث الجزيئي باستخدام الانظمة الموزعة (distributed systems) التي ستقسم البحث الجزيئي على عدد الحواسيب الكلي المشترك في الشبكة المستخدمة. لقد تم تنفيذ النظام المعتمد باستخدام فيجوال بيسك 6.0 كلغة برمجية. تم استخدام معدل الخطا التربيعي (MSE), ونسبة الاشارة الى التشويش (PSNR) كمعاملات حساب دقة النتائج المستخلصة من التقنيات الكلية المطورة في النظام المعتمد. | There are two main alternatives to compress a video. The first one, usually called intraframe approach, pretends to remove the spatial redundancy of an image without destroying important information. These methods are suitable for still image applications such as multimedia, image database, etc. Nevertheless, in applications that use a sequence of image, data such as TV scenes, video conferencing etc, time redundancy can be exploited to increase the compression ratio since consecutive frames are usually highly correlated. This second group of methods is called interframe approach, and pretends to remove temporal redundancy. In the second approach, motion estimation of sequence frames must be computed. In the proposed work, the interframe approach is implemented. In the field of motion estimation for video compression many techniques have been applied. Block - based motion estimation approaches are the most common procedures applied using various algorithms. The full search algorithm (FSA) provides the best performance but at very expensive computational cost. To reduce this computational requirement, fast search algorithms have been developed, among them being the conventional three - step algorithm (TSA). In the proposed work OTS, and TSS methods of ME are implemented in addition to a new developed Hybrid Method (HM).The interframe approach select a number of frames that will compress using compression system that is different than ME techniques, these frames are called Anchor frames (AF). In the proposed work there are two models that developed for video coding, the first one develop a compression system that depend on FDCT transform that a new derivation of DCT, where this transform is speed up through a new derivation that fully documented in the proposed work, and the second model develop the Fractal coding as compression system for AF. The disadvantage of Fractal coding is the expensive time that Fractal needs to complete its search. This problem is solved in the proposed work through fasting Fractal Search using distributed system that divide the Fractal search on the total number of Servers that shared on the network. The proposed work is implemented using Visual Basic 6.0 as a programming language. The fidelity measure MSE and PSNR are used to check the result of the whole developed techniques.

اخفاء الصوت ضمن مجال التحويل المويجي == Audio Steganagraphy In Wavelet Transform Domain

اسم المؤلف: منتصر جابر جواد
اسم المشرف: لؤي ادور جورج | بان نديم الكلاك
الموضوع العام: علوم الحاسبات
السنة: 2005
الموضوع الدقيق: علوم الحاسبات
الدرجة: ماجستير
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: الكتابة الخفية (Steganography) هو فن اخفاء المعلومات بطرق معينة بحيث يصعب اكتشافها. الرسالة المشفرة تؤدي الى الشك بينما الرسالة الغير مرئية لا تؤدي الى الشك. في فن الكتابة الخفية الرقمية تستخدم رسالة او بيانات معينة تعرف بالحاوية (Container) او الغطاء (Cover) لاخفاء بيانات او رسائل اخرى تسمى بالسرية (Secret) داخله.النظام المقترح في هذه الاطروحة هو نظام اخفاء صوت داخل صوت. في النظام المقترح البيانات السرية يتم تحويلها اولا باستخدام التحويل المويجي (Wavelet Transform) والمعاملات الناتجة يتم ترميزها باستخدام احدى طرق الترميز الثلاثة (طريقة ترميز الطول الثابت, طريقة الترميز بالتزحيف وطريقة الترميز الهجينة) المنفذة في النظام المقترح.المرحلة التالية في النظام المقترح هي مرحلة الاخفاء بحيث يتم اخفاء مخرجات مرحلة الترميز داخل بيانات الغطاء.هناك ثلاث طرق للاخفاء تم تنفيذها في النظام المعتمد (الاخفاء بالبت الاقل تاثيرا, الاخفاء بالبتين الاقل تاثيرا مع تقنية التحسين والاخفاء في الاجزاء المسموعة).النظام المقترح تم اختباره باستخدام ثلاث مقاييس معولية قياسية هي متوسط الخطا المربع (MSE) ونسبة الاشارة الى الضوضاء (MSE) ونسبة الاشارة العليا الى الضوضاء (PSNR).كما تم اشتقاق مقاييس معولية جديدة بادخال تعديلات على المقاييس المعولية القياسية هي متوسط الخطا المربع المعدل (MMSE) ونسبة الاشارة الى الضوضاء المعدلة (MMSE) ونسبة الاشارة العليا الى الضوضاء المعدلة (MPSNR) لتكون مناسبة اكثر لاختبارات الصوت.كل المقاييس المعولية التي استخدمت في اختبار النظام المقترح اظهرت قيم جيدة لـ(PSNR) والنسخة المعدلة منه حيث كانت (50 dB) كمعدل.اما البيانات المسترجعة فكانت بالضبط هي نفسها البيانات السرية التي تم اخفاءها اذا كان التحويل المويجي الصحيح (Integer Wavelet Transform) هو المستخدم في مرحلة الترميز بينما يظهر بعض الاختلاف الغير محسوس اذا كان نظام التحويل المويجي هار (Haar Wavelet Transform) هو المستخدم خلال مرحلة الترميز. | Steganography is the art of hiding information in ways that prevent its detection. A message in cipher text may arouse suspicion while an invisible message will not. Digital steganography uses a host data or message, known as a “container” or “cover” to hide another data or message called “secret” in it. An audio in audio steganography system had been proposed in this thesis in order to embed a secret audio data in another cover audio data. In this system, the secret data is first transformed using wavelet transform and then the resultant coefficients have to be coded using one of the three coding methods (fixed length encoding method, S - shift coding method and hybrid coding method). The next stage in this system is the embedding stage where the output of coding stage (a stream of bits) is embedded in the cover data. Three embedding methods were implemented in the proposed system (least significant bit insertion in wavelet transform domain, two least bits insertion in time domain with recovery technique and hiding in audible parts). A modified fidelity criteria were derived by adding some modifications to the standard fidelity criteria to be more precise for audio and the modified criteria are called (modified Mean Square Error, modified Signal to Noise Ratio and modified Peak Signal to Noise Ratio) and they also used through the system testing stage.All of the fidelity criteria obtained in the tests have indicates good results for PSNR and its modified version (50 dB). The reconstructed data is exactly the same as secret data if the integer wavelet transform is used before the coding stage while a small unrecognizable error may done when the Haar wavelet transform is used before the coding stage.

متنبئ تناظر البلوك لتحسين ضغط الصور الكسوري == Block Symmetry Predictor to Improve Fractal Image Compression

اسم المؤلف: رؤى عبد الله جابر
اسم المشرف: لؤي ادور جورج
الموضوع العام: علوم الحاسبات
السنة: 2008
الموضوع الدقيق: علوم الحاسبات
الدرجة: ماجستير
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: Various compression methods have been proposed to achieve high compression ratios and high image qualities in low computation time.One of these methods is Fractal Image Compression. The basic idea of fractal image compression is the partitioning of input image into nonoverlapping range blocks. For every range block a similar but larger domain block is found. The set of coefficients of mapping the domain blocks to the range block, using affain transform, is recorded as compression data. The compressed image data set is called the Iterated Function System (IFS) mapping set. Decoding process applies the determined IFS transformations on any initial image, and the process is repeated many times till reaching the attractor.In this research work, four IFS coding schmes have been established and tested. The first scheme is the traditional Fractal Image Compression (FIC) method, it is implemented on color images after transforming the (RGB) color components to (YCbCr) components. The compression results led to encoding time=144.02 sec, compression ratio=8.89 and PSNR=33.39.The second scheme uses the FIC method with a predictor based on centralized moment features, this predictor is introduced to predict the type of symmetry operation required to set the domain block in a proper state to best matches the range block. The use of this predictor helps in reducing the number of trials of symmetry mappings from 8 trials to only one symmetry case. The use of predictor had reduced the encoding to approximately 14% in comparison with that of traditional method.The third and fourth scheme implies the use of FIC method enhanced by the use of moment descriptor (order - 1) and (order - 3), respectively. Either of these descriptors is used to classify the domain and range blocks into classes, each class is assigned by a class index whose value is equal to moments descriptor value. For encoding each range blocks only the domain blocks have similar descriptor values to that for range block will be IFS - matched with it. In these schemes the symmetry predictor, used in the second scheme, had been used to reduce the search about the best available similar domain block. The attained encoding time in both 3rd and 4th scheme is approximately 0.9% of that spend by atraditional scheme.

تصميم وتنفيذ لنظام توصيات == Design and Implementation for Recommender System

اسم المؤلف: زينه حسين فهد
اسم المشرف: طه سعدون باشاغا
الموضوع العام: علوم الحاسبات
السنة: 2010
الموضوع الدقيق: علوم الحاسبات
الدرجة: ماجستير
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: Recommender systems have been introduced to provide a solution to navigating the huge volume of information already available and growing at an explosive rate. The amount of information available in electronic form, such as news, movies, books, advertisements and other online information is overwhelming us. Recommender systems are computerbased techniques that can be utilized to efficiently provide personalized services in many e - business domains.In this thesis, recommender system has been designed by mixing two main types of recommender systems (content based on personal profile and collaborative based). This type of system producing recommendations for its users in two stages. In the first stage, searching about active user's neighborhood is done to compute the similarity with the active user. The similarity is computed in two steps, the first step is to compute personal similarity using content based technique, depending on the personal features only. The second step is a conditional step that is if the user has enough rating then the similarity computed using collaborative filtering technique depending on the user ratings (rating similarity) in addition to personal similarity computed by the first step. In the second stage a list of new items is recommended from highly rated items by nearest neighbor users, with or without predictions on the acceptance of the list by the user.The content based part in which a personal similarity is computed a weight for each personal feature is required. So in this work, a survey has been made to obtain initial value for impact ratio (weight) for the effectiveness of each feature. Then the computation of these ratios is updated from time to time according to the given new users information.These updates are made according to Mean Absolute Error (MAE) between the real ratings and prediction of ratings

نظام محادثة فوري لشبكة اتصالات محلية مع بعض سمات الامنية == LAN - Based Instant Messaging System with Some Security Aspects

اسم المؤلف: مروة سعد ملكي القس
اسم المشرف: عبیر متي یوسف | جمال محمد كاظم
الموضوع العام: علوم الحاسبات
السنة: 2008
الموضوع الدقيق: علوم الحاسبات
الدرجة: ماجستير
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: Instant messaging is a form of online, real time form of communication between two or more people based on typed text. IM system has grown rapidly among network users. But most of existing instant messaging systems have severe security problems, people want to retain their privacy and communication should not copy or modified by a third party. This thesis presents the design and implementation of a secure instant messaging system. It achieved security objectives such as data integrity and confidentiality through encryption. It ensures that the conversation is only read by intended recipient. The name of the proposed system is chosen to be SIMSM (the acronym for SIMple Secure Messenger).SIMSM is designed for local networks. Based on client - server connection, it enables users to send and receive secure instant messaging between them. No internet connection is required. Easily in sending and receiving text messages. It supports standard messaging features such as private chat, group chat (conference), message notification and encryption. The primary constituting modules are : Registration Module which identifies users to the system; Login Module which allows users to access the system; Sign - In Problem Module that deals with forgetting the identification (ID) and password problem; Private Chat Module that enable private chat between online users; and Conference Chat Module that enable more than one online user to chat with each others.The proposed IM system has been evaluated according to two important factors in instant messaging : security and time consuming. Many test cases were taken to show that SIMSM is quite suitable for secure chatting service.The proposed secure instant messaging had been established using windows API functions with Java platform version 6.0.0.105 programming language.

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

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

دراسة عملية وعددية للقلاب المطور من نوع غيرني على مطيار CLARK Y - 14 لجناح مستقيم == Experimental And Numerical Study of Modified Gurney Flap on Clark Y - 14 Airfoil For Straight Wing

اسم المؤلف: احمد حامد حسين
اسم المشرف: Mohammed Kheir Aldeen Abass
الموضوع العام: هندسة الميكانيك
السنة: 2014
الموضوع الدقيق: هندسة الميكانيك
الدرجة: ماجستير
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: تناول هذا البحث دراسة عملية ونظرية لتاثير القلابات من نوع (Gurney) بارتفاعات واشكال مختلفة على العوامل الايروديناميكية لنموذج جناح ذو مطيار من نوع (Clark y - 14) ولعدد رينولدز يبلغ (2x105). الدراسة العملية اجريت في نفق هوائي ذو سرعة واطئة, حيث بلغت ( 35م | The present work was dealt with experimental and numerical investigation to the effect of Gurney flaps with different heights and configurations on the aerodynamic characteristics of Clark y - 14 airfoil wing at Reynolds number of 2x105. The experiments w

انتقال الحرارة بالتوصيل في وسط مسامي بسبب مصدر حراري مركز == Conduction Heat Transfer In Porous Media With Embedded Concentrated Heat Source

اسم المؤلف: مظفر سوادي تايه
اسم المشرف: Ihsan y.Hussain
الموضوع العام: هندسة الميكانيك
السنة: 2008
الموضوع الدقيق: هندسة الميكانيك
الدرجة: ماجستير
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: The present study had been carried out to investigate the twodimensional transient heat conduction with internal heat generation in rectangular enclosure air - saturated porous media theoretically.The investigated geometry is rectangle and different type

وصف سلوك الشد والانثناء والانحناء المعاكس للالواح المركبة المهجنة == Characterization of Tensile, Flexural And Reverse Bending of Hybrid Laminated Composite

اسم المؤلف: امير غالب مرتضى
اسم المشرف: Ali Hussein | Abdel Rahman
الموضوع العام: هندسة الميكانيك
السنة: 2014
الموضوع الدقيق: هندسة الميكانيك
الدرجة: ماجستير
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: تعتبر المواد المركبة المهجنة مواد ذات خواص جيدة للتطبيقات الهندسية.. وبناء عليه فقد جاءت هذه الدراسة لتتناول هذا الموضوع من خلال مناقشة تاثير هذه المواد المركبة الهجينية ))موقع الطبقات القوية المكونة من طبقات الفابير الكاربونية والكفلير مع الفايبر الزجاجي | Hybrid composites are considered as materials of great properties for engineering applications. In this study the behavior of hybrid composite materials, the location of stronger layers (Kevlar and carbon fiber) with multidirectional glass fiber in the ma

توصيف قابلية تشكيل الصفائح المعدنية لسبيكة البارص, CuZn30, الحديد المغلون وسبيكة الالمنيوم 1060 == Characterization of Sheet Metal Formability of Brass CuZn30, Galvanized Steel And 1060 Aluminum Alloy

اسم المؤلف: سلسبيل كريم محمد
الموضوع العام: هندسة الميكانيك
السنة: 2014
الموضوع الدقيق: هندسة الميكانيك
الدرجة: ماجستير
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: في هذه البحث تم دراسة تاثير درجة حرارة التلدين على قابلية تشكيل ثلاث صفائح معدنية مختلفة )سبيكة البراص CuZn30, الحديد المغلون وسبيكة الالمنيوم 1060 ( نظريا وعمليا.اجريت التجارب ضمن مدى من درجات الحرارة, سرع الانفعال وضروف التزييت المختلفة لتحقيق افضل متغ | In this work, the effect of annealing temperature on the formability of three different alloys (Brass CuZn30, Galvanized steel and 1060 Aluminum alloy) sheets was investigated both theoretically and experimentally. A range of annealing temperature, strain

تحليلات الستاتيكيه والديناميكيه لطرف اصطناعي مبتور خلال الركبة == Static And Dynamic Analyses of Through Knee Prosthesis Socket

اسم المؤلف: جنة صادق جعفر
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: الطرف هو الامتداد الاصطناعي الذي يحل محل الجزء المفقود من الجسم الذي فقد بالجرح او الفقدان من الولاده.وينبغي النظر في بتر خلال الركبه كبديل ل transfemoral.تناول هذا البحث جزئين رئيسين الجزء الاول قياس قوه رد الفعل الارضيه وتوزيع الضغط لكلا الطرفين المتو | Prosthesis is an artificial extension that replaces a missing body part, lost by injury or missing from birth, or supplements a defective body part. Through - knee amputation should be considered as an alternative to transfemoral amputation.This work invo

Radiation And Free Convection In Enclosure With Three Configurations of Heated Surfaces

اسم المؤلف: امير سعد عبد الحسين
الموضوع العام: هندسة الميكانيك
السنة: 2014
الموضوع الدقيق: هندسة الميكانيك
الدرجة: ماجستير
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: In this study, radiation and natural convection heat transfer in enclosure with three configurations of heated surfaces at different heat fluxes is investigated experimentally and numerically.The experimental part included design and building a model of

نقد المفاصل الحرجة في العمارة الاسلامية == The Criticism of Critical Joints of Islamic Architecture

اسم المؤلف: هديل سلمان نايف الشمري
اسم المشرف: ارشد عبد الجبار العنزي
الموضوع العام: الهندسة المعمارية
السنة: 2010
الموضوع الدقيق: هندسة العمارة
الدرجة: ماجستير
اللغة: العربية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: ان التراث المعماري الاسلامي ليس تراثا ماديا او شكليا فحسب، بل هو تراث فكري يعبرعن حاجة انسانية طبيعية، واذا اردنا اثبات ان تراثنا وعمارتنا الاسلامية ليس انتخابيا selective))، (وهذا راي بعض المفكرين الغربيين والمستشرقين)، يجب علينا القاء الضوء على | The Islamic architectural heritage is not material or formal heritage but the heritage of the intellectual and expresses natural human need, and its our response to prove that ours (our Islamic building) is not (elected)! This is the opinion of some Western thinkers and the Orientalists. We should shed light on this heritage, study and criticize their joints, and refer to the Islamic intellectual assets and sources of confusion in it. The research paying attention to the philosophical study of Islamic architecture (based on intellectual assets) and the root of this study to clarify the difference between (Islamic architecture) and (Architecture of Muslims), so the discovery and identification of critical joints of Islamic architecture will reveal a large part of this difference. Critical studies around the Islamic architecture is not sufficient to solve the problem of critical fact that do not rise to the production of solid intellectual foundation, for the shape of the Iraqi Islamic school, so the provision of critical examination philosophical critique of critical joints in Islamic Architecture (after detection and identification), it will save our societies from the paradoxical situation and the intellectual antagonism experiencing at the present time between trends and theories of Western, and Islamic intellectual needs (which may conflict with these directions).The critical joints in Islamic architecture will also have a critical rule through criticism of Islamic buildings ,and global with it , and to identify "critical joint " is the change that is made on a continuing phase and change it to another phase may be negative or positive, through the themes and architectural studies on the philosophical architecture on Islamic critical joints can be concluded in Islamic architecture and can develop the physical reality, and to give a clear vision about the need for the future " , sources of architectural form , Architecture relationship to man , subject and object and their relationship to architecture, Architecture as an object, Rule and order in Islamic architecture, engineering and mathematical relations in Islamic architecture, criticism of Structural in architecture and criticism of phyenomenology in architecture.The current architecture is not one that attaches to the research priorities and research attention, while attention is the need to shape an idea of the future Islamic Architecture (stemming from the Islamic asset),The study of the Islamic intellectual assets and production techniques architectural forms entrench us information theory to compare them to shape and develop our idea of the Islamic school for the future.The need for actual criticism will appear , in the criticism of Western theories and trends that apply to the Islamic bulildings now (or criticize the buildings) and was founded by intellectual analysis and comparison of what is ours from the Islamic intellectual assets, to distinguish in line with the thought and contrasts with, in essence. These trends are (Phenomenology, Existentialism, Structuralism, and Marxism).The search is now paying attention to (Islamic architecture), the Islamic heritage of intellectual (and spiritual), and the need for Islamic architectural future, Our architectural path need a clear objective aim, and future - oriented stems from the genuine Islamic thought to occupy a position of real Islamic architecture.

الموقف القيمي لجماليات العمارة العراقية المعاصرة == The Valuation Attitude For Aesthetics In Iraqi Contemporary Architecture

اسم المؤلف: فرح احمد خضر
اسم المشرف: عبد الحسين العسكري
الموضوع العام: الهندسة المعمارية
السنة: 2008
الموضوع الدقيق: هندسة العمارة
الدرجة: ماجستير
اللغة: العربية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: تعددت الدراسات المتعلقة بالجمال والجماليات المعمارية، كما تنوعت الحقول التي قامت بدراسة كل منهما، مثل الفلسفة وعلم النفس والاجتماع. فقد شغل الكثير من الفلاسفة بموضوع الجمال، واستمر البحث فيه وفي مصادره في مختلف العصور، وقد حاول علماء النفس والاجتماع وضع ت | Many studies were made about beauty and architectural aesthetics, as a variety of fields, which had studied each, such as philosophy, psychology and sociology. Beauty was always philosophers’ concern, and continued research it and it sources in various ages, psychologists and sociologists tried to find interpretations of the aesthetic experience according to their attitudes. The values were still the subject of research and study to this day. They were studied by philosophers, sociologists and psychologists and also by architects to see their influence on architecture. This research is a mere attempt to have a better understanding of the subject of beauty and its sources and its impact on the architecture and how to accept it and deal with it. From which the research’s problem appear which is the attempt to find the influence of the value situation on the architectural aesthetics of the Iraqi contemporary architecture. The research tries to combine the subjects of architectural aesthetics and values, and identifies the rule that values have in the matter of “aesthetic taste” for individuals and societies. Proceeding from the idea that beauty could be in subject or object or both, the research discusses the impact of values or values sequence in society on those two factors (subject and object). Thus the theses suggested to solve the research’s problem included the necessity of the value situation, which depends on not only philosophical bases but also social factors, to understand the architectural aesthetics; the second thesis included the importance of values’ situation to direct the “aesthetic taste”. The third thesis was says that due to the inconsistency of the political, economical and social situations in Iraq, a case of confusion in the aesthetic preference appeared, which requires finding the criteria to solve this problem.Values have different sources, their power and obligation increase according to the power of their sources. So in order to study these values the research went back to their sources to further understand them, then analyze their impact on the subjective and objective factors of architectural aesthetics. Chapter one of this study included the discussion of values, beauty, aesthetics and attitude, with a brief demonstration of their history and sources. While chapter two discussed architecture and it’s significance for society, then found that architecture carries the values of the society and thus it’s aesthetic sense, chapter two also gives a brief description of contemporary Iraqi architecture and the most important events that effected it. As for chapter three, there is a summery for all the information and conclusions made throughout the study and a subtraction of the main terms that form the objective and subjective characters of the architectural aesthetics, then they were put into comparism with the value situation to find their effect on aesthetics, then these relations were applied to examples of Iraqi architecture, the study found in the forth chapter that the relationship between values and aesthetics is strong, for both subjective and objective terms, because values are indicators and rules that society follow, and as long as the architecture follows these rules - values - it would be accepted by society and beautiful, and this is one of things that gives identity of architecture in a certain place and time The study also found that if the society was well connected and had strong and sacred values, its architecture will carry its identity and stands for its as well as all it’s arts.

التباين القيمي في العمائر == Axiological Diversity In Architecture

اسم المؤلف: زينب صلاح هادي الاعرجي
اسم المشرف: Arshad A.Abdullah alanizi
الموضوع العام: الهندسة المعمارية
السنة: 2010
الموضوع الدقيق: هندسة العمارة
الدرجة: ماجستير
اللغة: العربية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: تتباين مظاهر العمارة على مختلف الازمنة والامكنة على الرغم من وجود سمات مشتركة في الزمان الواحد والمكان الواحد، فترجع اسباب هذه التباينات الى الاختلافات الكامنة وراء تبني قيم محددة لفكر تلك المرحلة، فالقيم هي معايير سلوكية مفضلة كما تعرف على انها ما يجب ا | Varied aspects of architecture at different times and places, despite the existence of common features in one time and the one place, are due in the reasons for these discrepancies to differences underlying the adoption of specific values of the thought of that stage, the values are the standards of conduct favorite also known as what should be in return for what is an object, and those values often vary from one stage of thought to another, which is Born question which form of the problem of public research, which is how the impact of thought on the emergence of the theory of architecture and the production of manifestation of different groves, and more particularly the impact of variation value system on the manifestation of architecture in the movements of the different architectural which form the problem of search, which was born three problems dealt with research moral reflection contrast to three intellectual vocabulary (central universe, how to acquire knowledge and what the architecture), which form the three hypotheses The disparity value system in the central universe, which leads to variation in the manifestation of Architecture, and the consortium will form the second quarter were investigated variation of that individual in the mind of the most important movements Architecture (Classical, Modernism, postmodernism, deconstruction, folding, green, and Islamic thought) and investigate the the impact of such individual to produce Appearances for those buildings by presenting some examples of architecture. The contrast value system of ways to acquire knowledge, which leads to variation in the manifestation of Architecture, which form the third quarter were investigated variation of that individual in the mind of the most important movements Architecture (Classical, Modernism, Postmodernism and Islamic thought), and investigate the influence of the individual to produce Special appearances of these buildings through the presentation of examples of architecture. The disparity value system in the definition of what architecture is, which leads to variation in the manifestation of Architecture, which form the fourth quarter, which was investigated varying the individual at the thought of movements architecture that was mentioned earlier to get to the possibility of the impact of varying the individual to produce manifestation especially of the building. In the fifth chapter was reached that the contrast value - winning research in the vocabulary have the ability to create a variation in the manifestation of Architecture and production aspects of her own is a reflection of the thought of that stage to prove any relationship thought the document architecture, especially the vocabulary of research addressed by the research.

فلسفة السكن والحاجة الاسكانية == Philosophy of Housing And Housing Need

اسم المؤلف: مروة لؤي مجيد فليح الشقاقي
اسم المشرف: عبد الحسين علي العسكري
الموضوع العام: الهندسة المعمارية
السنة: 2010
الموضوع الدقيق: هندسة العمارة
الدرجة: ماجستير
اللغة: العربية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: من دون شك ان ظهور العمارة ,انما يعود الى زمن بعيد وقديم قدم الانسان , فقد بدا الانسان البحث عن ماوى ومسكن يسكنه ويؤويه,ولهذا يعد السكن من المتطلبات الاساسية وضرورة ملحة في حياة الانسان سواء كان في الماضي او في الحاضر ام في المستقبل.ان توفير السكن يعتمد عل | It's well known, the architecture began in human age by searching for a shelter being the basic necessities depending on housing policy of the and its permittance t community sectors (state, private, co - operative) to cover housing requirement. The progress and development of any state is measured to its sympathy with such requirement and on its capacity to secure affordable house to community's privates.In accordance, the importance of the research being deal according to housing philosophy concept with these serious aspects that related with wide social classes of Iraqis due to certain circumstances.The importance of the research depending on the need of securing the requirements of wide classes of population to suitable housing utilities (new and rehabilitating the excited ones) that cover the requirements of shelters, moreover : to find solutions within development - plan for such lack in short and medium terms.Therefore, the research, complication is to reach to clear image of unify various housing aspects according to the Islamic doctrines, the research assumed that the indications which solve the housing demand problem depend on the sustainable balance in the composition of the housing system. and the Islamic doctrines is the best concept to follow, because it give complete concept taking the real solution with objectivity ,doesn't separate from the incorporeity dimensions, ad take care for the human condition.The research remarked to various conclusions to solve housing crisis by mixed strategies starting by adopting some of the state to Islamic thoughts, using sustained balanced, solve the lack in housing frame, changing the related laws and regulations, legislating social solidarity, activating the role of co - operative societies And the research has some important recommendations, have been extraction from the research indications.

النمط والنمطية في العمارة == Type And Typology In Architecture

اسم المؤلف: علي ماجد حميد
اسم المشرف: ارشد عبد الجبار العنزي
الموضوع العام: الهندسة المعمارية
السنة: 2011
الموضوع الدقيق: هندسة العمارة
الدرجة: ماجستير
اللغة: العربية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: العمارة ليست حج ا ر؛ ولكنها الفكر الذي يقبع خلفه والسابق لعملية التصميم؛ فيمكن ايصال ذلك الفكر عن طريق الاشكال والرسوم او الصور او حتى كلاميا؛ ويلخص ذلك كله عن طريق مفهومي النمطية والنمط في التنظير المعما ري من خلال تحولاتهما عبر العصور؛ فالنمطية ه | Architecture is not a stone; It’s the prior thought behind design process; which could got from Forms; sketches or images and even verbally; and all summarizes through the concepts of Type and Typology in Architecture by its time transformations; Typology is architecture itself, it’s represent era imprint and it’s classifying Architectural movements, including its philosophical and theoretical ideas and even the applied. That’s made the Theory of Type in architecture deals with the thoughts and stone. Therefore the research aim is to mention the meaning transformation of the Type and Typology concepts; and clarify specific definitions for each of them; which considered challenge due to the conception transformation for them and their wide uses in the other fields. So, the research aims to examine type and typology importance in architecture, and the importance for the type double nature in the self - formal construction due to the culture fluencies and mixing. The research problem on how the Architecture benefits from the overall type theory, from the overview of preliminary research and chapters.Type is the active autonomous tool in the architectural design, and it’s the idea behind the image transferred to the observer. Although of the types’ prior existence; but it’s discovered according to its position; since the types are classified according to their positions; therefore the Ideal Types are the types in the Ideal world which it’s prior existence and its first physical presentation called the Prototype; after that the repetition of the prototype calls Stereotype; and due to these repetitions of the Stereotype; the type stand in the human mind and be as a human nature; when the type reaches to this position it is calls Archetype. And there are many other types classified according to their essence and formal properties; example : Active Type, Developed Type and Originating Type and others. The need of type and its origins theory research to define and discover the importance of the Type in language and architecture, and discuss its theoretical and continuity concept, as well as in autonomous architectural view with concept like Form, Meaning, Function, and Material.In the other hand, Typology stands in the theory of typology which is filled with meaning and different from the first half. It describes the era properties by the Typology Succession Process; therefore the research aims to define the architectural Typology by discussing its concept and importance in architecture. And explores the elementary and mechanical Typology and their properties, and its legitimacy in architecture.In Architecture which is the research third revolve; the importance of the Type and Typology Concepts in practice; for discussing great cases in architecture like first architecture origin. Although the bid difference between the rationalism and empiricism; they agreed that the type is the origin in first architecture; and it’s extrude all the architectural splendor of luxury. The Type Theory used in understands and analysis all architectural projects; since it’s the real standard in the architectural appreciation; and is giving real picture for the different types benefits in these projects. In spite of possibility project presentation according to many types; but some types are more useful from others in a project. These projects are decided by theory of type or by providing new types to meet the needs of the community. As well as; Theory of Type clarifies the accurate joints between typologies and the architectural revolutions in the history; the classical typology for example; adopted on the theory of complementarily with nature against which earlier in the architecture of the Baroque and Rococo; by its imitation with the Greek or Roman model. Where the theory of Typology tell us by the two typologies (classical and the pre - classical in baroque & rococo) are different, but they are not opposing; as is the case between Modernism and Classicism; they both derives their legitimacy from other sources outside architecture, in the other hand; the unitary holistic view of the modernism typology helped to break architect character and the architectural work in the community. But the city typology different from the previous typologies; it’s take its legitimacy from the architectural field, trying to fix the modernism faults by using the collective memory which stands in the human minds. The Conclusion is reviewing summarizing of previous chapters and put forward recommendations and the beneficiaries of the research.

التلقائية والقصدية في العمارة : امكانات التكنلوجيا وفق مفهوم المكان == Spontaneity And Intentionality In Architecture : The Potential of Technology In Accordance With The Concept of Place

اسم المؤلف: عبير قاسم جبر الزبيدي
الموضوع العام: الهندسة المعمارية
السنة: 2010
الموضوع الدقيق: هندسة العمارة
الدرجة: ماجستير
اللغة: العربية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: shall be treasury of knowledge which is a source of ideas and action, The act of human is a reflection , an expression and embodiment of the need, or desire. in the field of architecture, the design action is a result of the need for human safety , and self - realization, and the social and psychological needs, therefore, shelter of the first human needs, express the idea of first body reaction (the product of intellectual and physicist), varied between spontaneous and intentional : the planning and thinking preconditions for his idea, function, and method of installation elements and parts, according to what provided to him by intuitive logic of the board of formality, and the installation of the elements and materials provided by the surrounding environment. The idea was to model the architectural design for a variety of experimental methods of possible alternatives, and became the first structural model, which tried the alternatives and possibilities it is the model (fixed) within a spatial environment. technological first designing act consists of spontaneous Technologyrepresenting the factors of chance and subjectivity, and the process of repeating the form of productive to make it objectively, and traditionally the advancement of technology and its evolution, dominated by aspects of intentionality, guidance utilitarian, and substantive output, but man still seek spontaneous ways of thought embodies the products of creative spontaneity of the self, and the other overlap and coincide with the utilitarian aspects. This formulated the general problem of research as follows : try to reach a clear vision about the relationship between Spontaneity and intentionality in human action, and through the knowledge presented in the first quarter, research has come to formulate a knowledge problem then propose hypothesis as follows : What is the relationship between Spontaneity and intentionality in the designing act? And What is the role of subject of place in that relationship? Were assumptions reflect the main objective of the research and that the classification of the possible relationships between both sides of the spontaneous and intentionality and determine the factors underlying those relations and formulations following : major premise : the relationship between Spontaneity and intentionality in the act of Architectural Design is one of the relations of the three : overlap or match or contrast. The Secondary assumption : The type of the relationship between Spontaneity and technological intentionality in the act of Architectural Design deepened on : self creativity in dealing with the subject and the properties of place.Accordingly, the search mode theoretical framework included the chapters I and II, where the first chapter discusses the vocabulary of human action, and the concepts of Spontaneity and intentionality of technology, according to object and subject, and between ration and experience and referred to the concept of creativity as an act of self - conscious and explained the beginnings of a relationship between the spontaneity and intentionality in the Place. The second chapter dealt with the concept of place and definition of the most important characteristics, givens, on aspects of subjective and objective in the spatial characteristics, and their relationship to the creativity of self in the act of architectural design, and then draw the most important vocabulary and knowledges of the theoretical framework through the third chapter, which ends with two sets of indicators, the first group of indicators helps for analytical overview of the examples of (Chapter IV), which included : first housing in the villages of northern Iraq, and the school of the Baghdad, and the Pyramid of Cheops at Giza - Egypt, and the building of the Louvre Abu Dhabi, and the Centre for arts and music Abu Dhabi, and the building of Chinese television in Beijing, and units of student accommodation in Marseille - France. While the second group of indicators helps to test the validity of the hypothesis of the research, through two ways , first by the analytical tables and charts, and the second by the questionnaire (a comprehensive set questions posed to experts in architectural field).then the research ends with conclusions and recommendations, which revolves around the following points : classification of the relations between Spontaneity and technological intentionality in the act of architectural design, and (creativity of the self in addressing the subject) and subject (place), and dealing with the final conclusions of the points on the relationships of self - characteristics of the place where the designer especially based on the perceptions and experience, an attempt to highlight the impact of self in the act of architectural design and re - focus on their potential creativit.

استلهام الموروث التقليدي في العمارة المعاصرة : مدينة بغداد انموذجا == An Inspiration Tradition In Contemporary Architecture : Baghdad City As A Case Study

اسم المؤلف: نور علاء الدين محمد ال هاشم
اسم المشرف: جاسم الدباغ
الموضوع العام: الهندسة المعمارية
السنة: 2009
الموضوع الدقيق: هندسة العمارة
الدرجة: ماجستير
اللغة: العربية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: يهدف البحث لمناقشة احدى المواضيع التي طالما كانت مثار اهتمام بوصفها احدى المهام المطروحة في ساحة العمارة الاسلامية عموما, والعمارة العراقية خصوصا. وذلك ببيان كيفية استلهام الموروث التقليدي في العمارة المعاصرة, الذي يعزز عملية تحقيق الهوية لعمارة معاصرة. | Iraqi problems in particular, though how to aspires the traditional heritage in contemporary architecture Thus, The thesis emerges from the important of the studying the traditional heritage , for its embeds conjunction of the past with the present. This required the exploration of the intellectual origins and the characteristic of that rich heritage.In addition to that the research deals with inspiring important modern styles based on understanding the positive and negative aspects of the traditional heritage The research depends on inspiring the traditional heritage through the impact and the influence between the old and the new as a theoretical back ground and also through studying the ideological and philosophical concepts of the heritage and contemporary architecture. And to consider these aspects within the architecture and urban orientations As a result to that we will introduce a balance between inspiring traditional heritage and looking for contemporary, which is consequently importance to achieve a contemporary Iraqi architecture, as well as , finding the reasons behind the fall of the urban traditional and the halt of the architectural orientation in Iraqi and especially in Baghdad And for this reasons the most important things which this research aim's to providing the know how of the architecture and the traditional urban fabric objectivity and also to use the traditional heritage to create a modern architecture with high technology, but we must not forget the identity This also make us to know the works of the Iraqi architecture heritage and the reasons behinds the stop of there march To achieve the above facts we mentioned before , we divided this thesis in to four chapters The first chapter discuss the traditional heritage in Islamic cities second chapter deals with the world architectural trends and the contemporary Iraqi architecture. The first and the second chapters focused on building the theoretical and knowledge base to inspire the traditional heritage in contemporary architecture The third chapter deals with the analytical study and for this purpose we chose Baghdad city as a case because it represent a vivid and actual example for the modern Islamic city to give us numbers of conclusion and recommendation which we refers to in this thesis.

الفيزياء والعمارة == Physics And Architecture

اسم المؤلف: ندى عزام محمود الحمداني
اسم المشرف: اريج كريم مجيد السدخان
الموضوع العام: الهندسة المعمارية
السنة: 2008
الموضوع الدقيق: هندسة العمارة
الدرجة: ماجستير
اللغة: العربية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: تحقيق التوازن مع الطبيعة هو الهدف الذي تسعى اليه الجهود المبذولة من قبل العلماء والمصممين على حد سواء خصوصا مع المشاال المتزايدة التي تهدد عالمنا اليوم. وقد استغلت قوانين الفيزياء باعتبارها قوانين مستنبطة من الطبيعة من اجل تحقيق هذا الهدف ونتج عن ذلك ظهو | Achieving the balance with nature is the aim that all efforts of architectures and scientists trying to achieve especially with the increasing problems that threatened our world today. The laws of physics have been used as it is a law from nature to achieve that goal. resulting from that , the concept of sustainability that goes through all fields of life emerges to us with architectures like sustainable architecture, green architecture and Gaia architecture.The way to achieve sustainable architecture needs a full description to the relation between architecture and physics and goes in depth of this relationship.So the research general theses problem emerged that” there is few studies in complete vision about the concept of correlation between physical field and architecture from the theoretical concepts and the basic components that the concept embedded”. The minor thesis embedded that ”There is ambiguity in how to specify and act the physical laws by the designer and his interaction with it to give a touched result on the physical level “ , the research theses indicates “There is ambiguity in how to specify and act the physical laws in producing sustainable architecture”.The research aims to spot the light on this relationship between physical laws and architecture and examines its sustainability, and to make full use of natural laws available in our hands to produce sustainable architecture.The research structure has been built through 5 chapters : - First chapter : dealing with the intellectual theses and local studies that deals with the research problem “physics and architecture” to conclude the research problem and specifying the aim and methodology. - Second chapter : build a theoretical informational basis of physics and its relation with architecture, taking in consider the graduation and evolution of this relationship, and the main philosophical characteristics that reflected in architecture. - Third chapter : building the theoretical structure through polarizing the relation of physical laws with architecture so the special theses has been produced, which deals with the relation of physical laws with architecture, to conclude the variables that have beenexamined by applying them on a collected projects which is being agreed on its sustainability , so the research hypothesis has been formed and the final variables have been adopted as a measurable variables in the applied chapter. - Fourth chapter : specifying the way of measurements adopted and the definition of selected projects and making the practical study through applying the theoretical variables on an architectural projects. - First chapter : the final result of the study has been given , represented in : results correlated with theoretical structure , results correlated with practical side ending with the recommendations and future studies that grows from the research.The result of the study that the research has been reached to : is that the sustainable architecture is the architecture that achieves and embodies the physical laws on the theoretical, physical and functional level. Also the research has been reached to the following conclusions.

التجديد الحضري ومدينة الغد : دراسة تحليلية مقارنة في المدن التقليدية والمعاصرة == Urban Renewal And The Future City : A Nalytical Comparative Study In Traditional And Contemporary Cities

اسم المؤلف: نرجس حسين علي الجبوري
اسم المشرف: صبا جبار نعمة الخفاجي
الموضوع العام: الهندسة المعمارية
السنة: 2008
الموضوع الدقيق: هندسة العمارة
الدرجة: ماجستير
اللغة: العربية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: تمتلك المدن التقليدية ذات الجذور التاريخية والتراث الحضاري ومنها مدننا العربية عموما ومدننا العراقية على وجه الخصوص , خصائص معينة ناتجة من ثوابت ومحددات بيئية وثقافية متمثلة بالخصائص المادية للمدن التقليدية وتشمل البيئية والاجتماعية والاقتصادية والجمالية | Cities have the traditional historical roots and cultural heritage, including Arab towns in general, and cities of Iraq in particular, certain characteristics resulting from the constant and the parameters of environmental, cultural form of physical characteristics of traditional cities include environmental, social, economic, aesthetic and non - physical characteristics of Others include intellectual, social, artistic, which gave its cultural identity And attribute them over time, it also faces great challenges in light of the evolution of modern and emerging challenges represented by these physical challenges, which include (population explosion and the crisis of transport and communications, pollution, energy consumption, technology, communications and information revolution) and non - physical challenges of others (the crisis of identity, alienation, globalization ), Which was a threat to these cities in civilization side and the future development. Therefore, research take urban design policies and methods with regard to urban renewal for the Future of Urban best of these cities and assimilate the age and its challenges, thus identified the problem of research the future development of cities with traditional historical roots and their attitude towards the immediate challenges of the age and the role of urban renewal policies in that. And define the research aims by providing knowledge on traditional cities with the historical roots by discussion over the physical characteristics and non - physical and put the challenges facing these cities to identify the most important urban renewal strategies best suited to the nature of these cities that represent the origins of Action for the future development of these cities. Assumed that the traditional cities of the historical roots of many of the constants and parameters relating to physical characteristics and non - physical characteristics for such cities as it faces significant challenges in light of the evolution of the times, therefore, the existence of a future vision for how those cities in the near future is a necessity for urban renewal policies and selection Most of which is key to the city's future and be absorbed by the immediate requirements of the age as a Predictive. The research methodology adopted analytical and descriptive in the theoretical framework, and practical framework has been selected five global examples (Arab and Western) that represent the cities of the future rooted historical and civilization heritage, The results showed the effectiveness of urban renewal policies in the future development traditional cities with historical roots and absorb solutions thereby realizing convoyed the age and preserve the cultural heritage and inspire cultural heritage at the level of details or potential sleeper, which is considered some of them as solutions to the challenges of the times, and the varying policies of urban renewal in accordance with the importance of Heritage area in addition to other factors, has focused on preserving areas of high architectural value with a flexible approach to preserving and reviving the architectural heritage and linking it with the whole city, and adopt a principled rehabilitation in areas of moderate architectural value terms allow for modifications and additions - run of the existing buildings to stimulate economic, social and cultural life, and adopt a principled urban infill in urban areas that have been rehabilitated vacant and destroyed spaces, the principles re - development, follows in areas outside the boundaries of traditional areas of inheritance Civilized, and revitalization follows at the level of a whole city, connecting the previous policies.

تقويم الموروث العمراني على وفق المواثيق الدولية : دراسة تحليلية للمركز التاريخي في الكاظمية == Rectification of Architectural Heritage According To International Conventions : Analytical Study of The Historical Center In Kadhymiah

اسم المؤلف: سماح عبد العزيز ابراهيم
اسم المشرف: مظفر علي الجابري
الموضوع العام: الهندسة المعمارية
السنة: 2008
الموضوع الدقيق: هندسة العمارة
الدرجة: ماجستير
اللغة: العربية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: تشكل عملية تقويم التراث جانبا مهما في عملية تحديد التراث ومعرفة الطرق الامثل للتعامل معه على اساس اهميته وما يحمله من قيم تراثية، ويمكن تعريف عملية تقويم التراث بانها عبارة عن مجموعة الاجراءات والاساليب والمؤشرات والمعايير التي تستخدم لتقييم وتحديد قيمة ا | Rectification of architectural heritage is an significant side in the process of selecting , listing , and dealing with cultural heritage according to it’s values and importance ,This process could be defined as the procedures and criteria used for evaluating heritage and knowing the advantages an disadvantages of the approaches of dealing with heritage based on the items mentioned in the international conventions ,which would help increasing the advantages and reducing the disadvantages in any future development projects.Heritage Rectification also helps knowing whether the cultural heritage property matches the international criteria and conditions of listing International Heritage and it’s ability to give a special identity to the culture of it’s country, facing the future changes and carrying the past generations’ message into the future generations.Although there are many studies related to heritage , but the divisions and types of heritage was rarely mentioned , so as for the criteria based on which some cultural heritage properties are to be considered as international heritage holding extraordinary values , and have a special protection by international organizations.Based on all of the above , the research is oriented to focus on the concepts , terms and criteria associated with listing and protecting cultural heritage, and the studying of significant experiences of dealing with heritage by international organizations including a city in Iraq , in order to make an approach of evaluating ,developing and protecting heritage ,and test it on the historical center in Kadhmyah old city , as a model of many other cultural heritage sites in Iraq.In order to achieve that ,the research is divided into three chapters , the first chapter deals with the main concepts and approaches associated with Architectural Heritage while the second chapter contains the main international conventions on heritage and studying and analyzing different experiences of protecting heritage , in order to conclude the terms and criteria of listing and protecting international cultural heritage and test them on the historical center in Kadhmyah city in the third chapter of this research , reaching into the conclusions and recommendations in the fourth chapter.

تكنولوجيا المنشا في النتاج المعماري المعاصر == Technologies of Structure In Contemporary Architectural Products

اسم المؤلف: اسراء عامر عبد الكريم
اسم المشرف: بهجت رشاد شاهين
الموضوع العام: الهندسة المعمارية
السنة: 2009
الموضوع الدقيق: هندسة العمارة
الدرجة: ماجستير
اللغة: العربية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: تعد العلاقة بين النتاج المعماري والجانب الانشائي في العمارة محط جدل الكثير من المعماريين في كيفية اظهار التكامل في مستوى تلك العلاقة وكيفية تاثير كل منهما في الاخر ولقلة الدراسات التي تناولت تلك العلاقة او وجوددراسات ركزت على جانب واحد وترك الجوانب الاخ | The relation between the architectural product and structural side in architectureconsiders a twisting point to a lot of architects, how demonstration the integrated in this relation and how the both effect on each others.Becaouse of few studies that had taken this relation or some studies concentration on one side and ignore the other side,for example some of these concentrations on formal side and ignore the structural side or other wise ,So appeared the important need to explain features of the relationbetween architectural product and manners of structural systems and from that can be striation the research problem, that is : "knowledge less about the integrationrelation between structure and architectural form in Contemporary age ". Base on this problem to be done the primary vision to the aims of this research and its method and framework to be requisite now reaching to method for untying this problem, So the chapter one give the inclusive definition of technology in public and explain foundations of technology, then explain the important sides of technology which is the structure side with all there nature conception, features and classifications. Also the nature of structural material that effect on structures choice and treating with them from functional, aesthetic - expression sides. While the chapter two have the second side of this relation that represented by the architectural product with all there features and the architectural form's nature and it sources and the extraction of important factors that effect on architectural form from functional, aesthetic - expression sides. then display the important items of theoretical framework that extracted from chapter one and chapter two. The theoretical frameworks consist of three levels are : " structural level, formal level and the relation nature between them. Chapter three have two axises, the first contains a public study of Contemporary Architecture to reach the effect of form on structure and other wise, while the second axis contains an application study for untying research problem that had taken by five projects and determine the basis choice of theses projects and that done by applying the theoretical framework's primary and secondary items on these projects ,By that it had explained possible limitation for the theoretical frameworks application and description the cases that actualized the effect of technology on integrated of architectural structure systems that can be got by defining this effect and the how to actualize on the all five projects.finally Chapter four contains a discussion of results and define the finally conclusions of this research with explaining the research recommendations ,future studies and foundations that willbenefit from this research.

التفاعل الحضاري واثره في تغير مراكز المدن التاريخية : دور الاحتلال في التغير العمراني == Civilization Interaction & Its Effect On Changing Historical Cities Centers : The Role of Occupation In The Urban Change

اسم المؤلف: محمد احمد شهاب الروزنامجي
اسم المشرف: اريج كريم مجيد السدخان
الموضوع العام: الهندسة المعمارية
السنة: 2009
الموضوع الدقيق: هندسة العمارة
الدرجة: ماجستير
اللغة: العربية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: Civilization Interaction is an everyday life process that affects the city centers and that encourages their continuity in times and discourages them in others, in certainrelation between two : dialogue and conflict. This principle was the basis of study of one of the important phenomena related to the human existence : interaction betweencivilizations, whether dialogue or conflict, and the relation of these two poles on many levels and through many mechanisms, and the effect of this process on city centers positive or negative, according to the relation of these two poles and because that dialogue and conflict represent opposing extremes of the same phenomenon. Thecivilization interaction is changeable, sometimes the dialogue pole dominates, and sometimes the conflict pole. This is reflected on the city centers development. Theabsence of the comprehensive understanding of the co - existence of the two poles within this single phenomenon in architectural and non - architectural theses about thissubject is a reason that initiated this research. Accordingly, the research problem was formulated as " researching for the positive and negative factors in the process ofinteraction among the civilizations which happenes within the circumstances of occupation,and explanation of the degree of the circumstances on the process of interaction between the civilization of invader and the country which below the occupation.. The research theoretical goal is formulated as "to diagnose the change patterns that occur in historical city centers and define their nature, the change effected by the imposition of other civilizations (occupations) on the local ones (within the framework of the dialogue and conflict bipolar equation).On the practical level : the above - mentioned theoretical principles are applied to carefully chosen reallife examples. Using the analytical inductive methodology, the researcher has divided the research into six chapters : chapter one is dedicated to present a general introduction to civilization interaction and its effect on the changeability of historical city centers by listing and criticizing previous relevant researches and theses. Chapter two is devoted to discussing the concept of civilization and civilization interaction through many theses about the civilization interaction within its two poles, the factors that encourage this process and its levels and the alternation of this phenomenon between the poles. Then this relativity is further clarified through shedding light on city and its historical center that witnesses the process of the civilization interaction and the change of this center negatively and positively according to the relative movement between the two poles of the civilization interaction process and its effects on the variables of the center. Chapter four is devoted to build the theoretical framework through understanding one of these factors : occupation factor as one of the civilization interaction factors along with its two poles and the effect of this factor on the changeability of historical city centers within a mechanism of movement between the two poles of the process, through the analysis of chosen historical city centers of occupied civilizations affected by the civilization interaction, be it positive or negative, depending on the movement of the two poles of the process, especially regarding the urban expansion as a result for this factor. The research explain the existence of a gap in the knowledge in terms of relations, such as the relations of the two poles of the civilization interaction, the relativity of relationship between them, through the analysis of historical city centers within the civilization interaction process, affected by occupation factor according to relative criteria to measure this relation, derived from the theoretical framework (that is studied in Chapter four) and explained in chapter five (the practical application). The relation between the two poles of the civilization interaction was studied, along with their effect in the changeability of the historical city centers (of Baghdad, Aleppo, and Jerusalem).Chapter six is divided into two axes; the first was reserved for the conclusions from the research, while the second one is dedicated recommendations of the resear.

التكنلوجيا الحديثة وسبل توظيف الطاقة الشمسية في التصميم البيئي المستدام == High Technology In Solar Energy Strategies And Utilizing In Environmental Sustainable Design

اسم المؤلف: تمارة عبد الكاظم جواد كاظم
اسم المشرف: صبا جبار نعمة الخفاجي
الموضوع العام: الهندسة المعمارية
السنة: 2009
الموضوع الدقيق: هندسة العمارة
الدرجة: ماجستير
اللغة: العربية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: يستدعي التطور العظيم في مجال التكنلوجيا والتقنيات الحديثة دراسة مستفيضة في مجال تكيفات الطاقة ولاسيما في عصر اصبحت الطاقة فيه مشكلة اساسية كونها في طريقها للنفاذ ويستوجب الاعتماد على مصادر اخرى غيرالمصادر الحالية. ويمثل مجال العمارة احد اهم المجالات ذ | The gigantic development in the domain of technology and modern techniques calls for overall study in the domain of energy’s conditionings, this is particularly so in an era where energy has become a basic problem due to being in the course of depletion. This forces us to depend on other sources than the current ones. The field of architecture is directly associated with the energy issue, the research to study the conditioning of architecture with energy was about the solar architecture by the virtue of the sun being a non - depleted alternative source to be utilized technologically. The research was concerned in the study of all current and future techniques of solar energy. The core of the research was : Give acknowledgment about the role, important and capability at implementation of solar energy as non - depleted source in the sustained environmental design. This query led to emergence of ancillary knowledgeable problems about the implementable technological means in Iraq which depends on merger of the passive and active means and its techniques that suit the climate of our zone. The goal is to provide acknowledgement about the importance of solar energy and identified the modern means, techniques and implementation of this energy in sustainable design compatible with the hot dry climate of Iraq. The research relied on the assumption that merger of passive and active design in the solar design is the optimum guarantee for realization of maximum benefit from such energy. Chapter 1 dealt with energy’s topics, sources and its current problem, it put forward the most important current and future alternatives. Chapter2 focused on solar architecture in the domain of climatic design as an important environmental solution for the problem of energy depletion. Chapter 3 put forward the most important techniques of solar energy. In chapter 4 many local, Arab and global examples were presented for comparison with its solar treatment methods and followed techniques. The purpose is to get the best conclusion and recommendations for dealing with the circumstances and specificity of our region and its hot dry climate and that was by the combination between the two systems of solar design to ensure that the building is self conditioned and then powered it with the energy.

العمارة والازمة اثار الحرب في الانساق الحضرية == Crisis And Architecture Effects of War On Urban Patterns

اسم المؤلف: شيماء طلال عبود
اسم المشرف: اريج كريم مجيد السدخان
الموضوع العام: الهندسة المعمارية
السنة: 2008
الموضوع الدقيق: هندسة العمارة
الدرجة: ماجستير
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: Crisis represents one of the most important factors that lead to radical changes in the city systems within a short period of time, and because of the war being one of the most important causes and results of a crisis; therefore war changes the city systems in different aspects.The war mechanism mainly depends on its destructive energy which affects directly the city systems, as well as its physical and symbolic components; nevertheless, the city constantly tries to balance itself by controlling its changing elements in the reconstruction process to form a new balanced state.A comprehensive theoretical framework capable of building integrated basic concepts about reconstruction of cities influenced by war and its effects on urban patternschange was absent in the literature.This have led to the creation of the basic research problem which is "the lack of a professional knowledge concerned with the concepts of city urban patterns and their changes during crises."Therefore, the aim of the research is to clarify the physical relation between war and the patterns of urban fabric. This will be done by studying the effects of the war massive destructive energy on the urban patterns through related literature such as chaos theory and its applications in mathematical field (fractal geometry) which will help in establishing a database concerned with the concepts of crisis, war, pattern, fractal and change. In order to accomplish this aim the research suggests a main hypothesis, which is "the war may demolish the fractal characteristics of the urban fabric by changing its patterns" and a secondary hypothesis "the reconstruction process plays a vital role in controlling the fractal characteristics of the urban fabric".The research structure comprises chapters discussing the research fundamental concepts by implementing a scientific analytical methodology and chaos theory since the war is an unpredictable state with high energy that follows non linear path and a wide range of probabilities.Chapter One comprises introduction and the literature review which is of great importance in determining research problem, aims, hypothesis, and methodology.Chapter Two discusses the nature of crisis and war by studying their types, conducts, mechanisms, and theories to extract the interrelationship between them; ultimately the chapter ends with discussing their damages to the system.Chapter Three discusses the nature of pattern and its changes by studying its components, types, mechanisms, and theories in order to recognize pattern's necessity for the continuity within the urban fabric.Chapter Four discusses the theoretical framework of war and pattern change by investigating how the crisis may deform the fractal properties of the urban fabric through transforming the existing physical patterns.Chapter Five is the practical application of the theoretical framework which tests a number of regional and international examples by applying the research hypothesi on a number of selected samples and finally proves the validity of the research hypothesis in Baghdad reconstruction proposal.Chapter Six finally ends the research with conclusions and recommendations to sustain the fractal characteristics of cities damaged by wars, through reconstructing structure from the beginning with the appropriate trends of reconstruction; otherwise the inevitable patterns that develop as a result will cut across the original fractal properties.

سلوك ركائز الجسور المغمورة في طبقات التربة تحت تاثير هزة ارضية == Behavior of Bridge Piles Substructure Embedded Into Soil Layers During Earthquake

اسم المؤلف: نور احسان علي
اسم المشرف: Ammar A. Abdul Rahman
الموضوع العام: الهندسة المدنية
السنة: 2014
الموضوع الدقيق: الهندسة المدنية
الدرجة: ماجستير
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: تقييم سلوك دعامات الجسور والتربة المحيطه بها تحت تاثير الهزات الارضية اصبح ضروري بالعراق خاصة بعد الهزات التي ضربت وسط وجنوب العراق بالسنوات الاخيرة.تم استخدام نموذج ثلاثي الابعاد من العناصر المحددة لتمثيل التربه المحيطة بركائز الجسور المستخدمة في العراق | The evaluation of the interaction of bridge piers with surrounding soils during earthquakes become necessary in Iraq especially after the influential earthquakes hit middle and south of Iraq during the last few years.A three dimensional finite element mo

النمذجة بالعناصر المحددة للاعمدة الخرسانية المسلحة المحملة لامركزيا والمقواة بالياف الكاربون البوليمرية == Finite Element Modeling of Eccentrically Loaded Rc Columns Confined With Cfrp

اسم المؤلف: علي ماجد لفتة
اسم المشرف: نبيل محمد علي
الموضوع العام: الهندسة المدنية
السنة: 2014
الموضوع الدقيق: الهندسة المدنية
الدرجة: ماجستير
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: The use of carbon fiber reinforced polymer (CFRP) becomes common in recent decades to strengthen most concrete structural elements because these fibers possess high tensile strength, through which it can increase the resistance of these elements to intern

التشوهات وضغط الماء المسام في ترب بغداد المتماسكة باستخدام انموذج السطح المحيط == Deformation And Pore Water Pressure Respinse of Baghdad Cohesive Soils Using Bounding Sueface Plasticity Model

اسم المؤلف: احمد علي حسين التميمي
اسم المشرف: قاسيون سعد الدين محمد شفيق
الموضوع العام: الهندسة المدنية
السنة: 2014
الموضوع الدقيق: الهندسة المدنية
الدرجة: ماجستير
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: ادى التطور الحاصل في طريقة العناصر المحددة finite element method الى حلول متقدمة في مشاكل الانضمام, وخاصة في التعامل مع الابعاد الھندسية المعقدة وشروط الحدود.( Boundary conditions في ھذه الدراسة, نفذ العمل المختبري لايجاد معاملات انموذج السطح المحيط لل | The development of finite element methods has led to the advanced solution of consolidation problems, especially when dealing with complex geometry and boundary conditions.In this study, experimental work was carried out in order to obtain bounding surfa

التحليل الثلاثي الابعاد للحفريات بطريقة العناصر المحددة وباستخدام انموذج السطح المحيط المرن اللدن == Three - Dimensional Finite Element Analysis of Excavation Using The Elasto - Plastic Bounding Surface Model

اسم المؤلف: فادي لؤي عبو
اسم المشرف: Qassun Sa'ad Al | deen mohammed Shafiqu | Raid R, Al | omari
الموضوع العام: الهندسة المدنية
السنة: 2008
الموضوع الدقيق: الهندسة المدنية
الدرجة: ماجستير
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: Three - dimensional finite element analysis for excavation problems is conducted in this study to investigate the significance of three - dimensional analysis in these problems.A main computer program has been modified to perform the timedependent three

سلوك العتبات الخرسانية ناعمة الدقائق المسلحة المركبة عالية المقاومة وذاتية الرص ذوات مقطع T المصبوبة جزئيا في سواقي حديد == Behavior of Composite Reinforced Hs - Scm T - Beams Partially Cast In Steel Channels

اسم المؤلف: ياسمين نوري خليل البريشة
اسم المشرف: Laith Khalid Kamil AL | Hadithy
الموضوع العام: الهندسة المدنية
السنة: 2014
الموضوع الدقيق: الهندسة المدنية
الدرجة: ماجستير
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: الحاجة الى الابتكار او لتطوير طريق جديدة لدمج الحديد والخرسانة تتزايد باستمرار من اجل تحقيق المتطلبات المعمارية المستمرة فيما يتعلق بالفضاءات واعماق العتبات، او فيما يتعلق بطرق التشييد الاقتصادية السريعة والبسيطة.وفقا ذلك، فان هذه الدراسة هي كمحاولة لتح | The need to innovate or to evolve new methods of combining steel and concrete fulfilling the continuously rising levels of architectural requirements in regard to beams spans and depths, or relevant to simple, quick and economical construction methods it

تحسين عمر الكلل لمنشا الرصف == Enhancement of Fatigue Life For Pavement Structure

اسم المؤلف: مثال قدوري علي
اسم المشرف: Nabil mohammed Ali hussein | Alaa hussein Abed
الموضوع العام: الهندسة المدنية
السنة: 2014
الموضوع الدقيق: الهندسة المدنية
الدرجة: ماجستير
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: اعادة تاهيل التبليط وتصدع طبقة الاسفلت الخارجية يمكن ان يتم ببساطة عن طريق اكساء طبقات اسفلت جديدة, هذا التصدع يكون بسبب القوى الخارجية الناتجة من حركة الاحمال المرورية واختلاف درجات الحرارة, الشقوق الموجودة او المفصلية تتقدم بسرعة كبيرة من طبقة التبليط ا | The rehabilitation of an existing cracked pavement made of asphalt can be simply done by the installation of new asphalt layers. Due to external forces from traffic and natural temperature variations, existing cracks or joints rapidly propagate out of the

سلوك الكتائف الخرسانية المسلحة تحت تاثير الاحمال الدورية التكرارية == Behavior of Reinforced Concrete Corbels Under Repeated Loading

اسم المؤلف: رعد شامل فرحان
اسم المشرف: احسان علي صائب الشعرباف | عادل عبد الامير العزاوي
الموضوع العام: الهندسة المدنية
السنة: 2014
الموضوع الدقيق: الهندسة المدنية
الدرجة: دكتوراه
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: ان استعمال العناصر الخرسانية المسبقة الصب في البناء والجسور اخذ بالاتساع خلال النصف الثاني من القرن الماضي. والكتائف الخرسانية هي مثال للاج زاء الانشائية المسبقة الصب. حيث تستخدم هذه الكتائف كمسند للعتبات والبلاطات والروافد الضخمة وكذلك الاعضاء الانشائية | The use of precast reinforced concrete element for the construction of buildings and bridges has become common during the second half of previous century. Corbels or (brackets), which are usually built monolithically with columns, are members that support

سلوك العتبات الخرسانية العميقة ذاتية الرص تحت تاثير الاحمال الدورية التكرارية == Behavior of Self Compacting Concrete Deep Beams Under Repeated Loading

اسم المؤلف: عمر شمال فرحان حمد
اسم المشرف: Riyadh J.Aziz | Ihsan A. S. AL | Shaarbaf
الموضوع العام: الهندسة المدنية
السنة: 2014
الموضوع الدقيق: الهندسة الانشائية
الدرجة: دكتوراه
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: ان الغرض من ھذا البحث ھو تحري عن السلوك العملي والتحليلي للعتبات الخرسانية العميقة ذات مقاومة انضغاط اعتيادية وذات مقاومة انضغاط عالية تحت (Self - Compacted) ذاتية الرص باتجاه واحد لغاية الفشل. (Monotonic) والاحمال التزايدية (Repeated) تاثير الاحمال التكر | This research is devoted to investigate the experimental and numerical behavior of normal and moderate high strength self compacting concrete (SCC) deep beams under monotonic and repeated loading regimes.The experimental program consists of casting and t

تحليل الالواح السميكة المستطيلة المسندة على اسس مرنة ذات المعاملين == Analysis of Thick Rectangular Plates on Two Parameter Elastic Foundations

اسم المؤلف: تقى وليد احمد
اسم المشرف: Riyadh J.Aziz
الموضوع العام: الهندسة المدنية
السنة: 2008
الموضوع الدقيق: الهندسة المدنية
الدرجة: ماجستير
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: ھذا البحث يتعامل مع السلوك الخطي للصفائح السميكھ المسنده على اسس مرنه ذات معاملين. نظرية مندلن للوح السميك تم توسيعھا لتشمل تاثير استناد اللوح على اسس مرنه ذات معاملين.(Filonenko - تعتبر مشاكل الالواح السميكھ المسنده على اسس مرنھ ذات معاملين من التطبيقات | This research deals with the linear elastic behavior of thick plates resting on two parameter elastic foundations. Mindlin’s thick plate theory is used to include the effect of two parameter elastic foundation.As an application; the problems of thick pla

تصرف العتبات الخراسانية المسلحة تحت تاثير اللباب المنتزع بشكل كامل == Behavior of Reinforced Concrete Beams Subjected To Full - Drilled Cores

اسم المؤلف: ميس صباح الكفيشي
اسم المشرف: Adel A. Al | Azzawiziz
الموضوع العام: الهندسة المدنية
السنة: 2014
الموضوع الدقيق: الهندسة المدنية
الدرجة: ماجستير
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: تتناول الدراسة الحالية تحري تصرف العتبات الخرسانية المسلحة المعرضة الى لباب منتزع بشكل كامل من خلال طريقتين : عملية ونظرية. ان العوامل الرئيسية التي تمت دراستها هي تغير مواقع وعدد اللباب الماخوذ. في الجزء العملي من البحث تم صب ستة عتبات باستخدام الخرسانة | This study presents an experimental and numerical analysis on the structural behavior of reinforced concrete beams subjected to fully - drilled cores failed to meet the design concrete strength. The main factors of this study are : the position and the nu

سلوك الروافد الفولاذية المركبة مفتوحة الوترات == Behavior of Composite Open Web Steel Joists

اسم المؤلف: علي فرحان حديد احمد المحمدي
اسم المشرف: رياض جواد الموسوي | ليث خالد الحديثي
الموضوع العام: الهندسة المدنية
السنة: 2014
الموضوع الدقيق: الهندسة المدنية
الدرجة: دكتوراه
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: تصرف العتبات ( العوارض) الفولاذية المركبة قد تم دراستھا بمختلف المتغيرات،اھمھا 1.اسلوب 2.درجة الربط بين البلاطة والوتر الفولاذي العلوي 3.زاوية ميل (studs ) توزيع روابط القص اضلاع الجذع 4.شكل الجذع 5. كثافة الخرسانية للبلاطة 6. طول رابط القص.استخدمت سبعة | The behavior of the composite open web steel joists COWSJ with seven varying parameters is investigated. All fabricated joists have the same length and the same length - to - depth ratio which are 3000 mm and 12, respectively. The results of loading tests

سلوك العتبات الخرسانية المسلحة عالية المقاومة العميقة تحت تاثير الاحمال المتكررة == Behavior of High Strengh Reinforced Concrete Deep Beams Under Repeated Loading

اسم المؤلف: حسين محمد علي خضير
اسم المشرف: Ihasn A.S.Al | sharbaf | Laith KH. Al | Hadithy
الموضوع العام: الهندسة المدنية
السنة: 2014
الموضوع الدقيق: الهندسة المدنية
الدرجة: دكتوراه
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: تم في ھذا البحث دراسة سلوك العتبات الخرسانية المسلحة عالية المقاومة تحت تاثير الاحمال المتكررة. حيث ان سلوك ھذا النوع من العتبات عادة تطغى عليھ تاثيرات احمال القصوالفشل القصيف. ان طبيعة الفشل المفاجئ للخرسانة عالية المقاومة تضيف صعوبة اضافية للحصول على تص | This study is concerned with the strength and behavior of deep beams made from highstrength concrete under reversed and non reversed repeated loading. The response of such beams is often strongly governed by the shear effects leading to shear induced brit

تقليل الاعاقة في الجريان المضطرب باستخدام البولي اكريل امايد وصمغ الزانثان : دراسة عملية ونظرية == Turbulent Drag Reduction By Polyacryl Amide And Xanthan Gum, Experimental And Theoretical Investigation

اسم المؤلف: احمد عدنان عطشان
اسم المشرف: جبار شنشول جمالي
الموضوع العام: الهندسة الكيمياوية
السنة: 2008
الموضوع الدقيق: الهندسة الكيمياوية
الدرجة: ماجستير
اللغة: الانكليزية
النص الكامل من المصدر: https://nahrainuniv.edu.iq/sites/default/files/THESIS_8.pdf
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: This work presents an experimental study of the drag - reduction performance of two water - soluble polymers, Polyacrylamide(PAAM) as flexible, linear synthetic polymer and Xanthan Gum(XG) as a rigid polysaccharide from natural resources. The flow loop used consisted of 0.5 O.D. inch straight pipe with a test section of 3 m length. A 0.5 inch O.D. vertical tubing with elbows was also included to compare the drag - reduction behavior between both tubing configurations. Various concentrations of polymeric additive and water flow rates were tested. The results show that the drag - reduction in vertical piping are significantly lower than in straight type for both polymer type. The dragreduction efficiency of Xanthan Gum agent is much lower than polyacrylamide. Higher concentrations of XG about 150 ppm is required to get exactable drag - reduction performance about 12.84% in the straight pipe. While about 40.3% drag - reduction was achieved with about 50 ppm Polyacrylamide with the same conditions. Moreover, the drag - reduction efficiency of XG can be improved by mixing with Polyacrylamide agent at a given conditions.Part of the experimental work was devoted to study the performance of Polyacrylamide as drag - reducing agent with the existence of small amounts of sodium chloride acts as an inhibitor to the ability of the additive, resulting in lower drag - reduction probably due to collapse of PAAM at more compact structure with the addition of sodium chloride as strong ionic salt.Polyacrylamide and Xanthan Gum additive undergo undesirable mechanical degradation with increasing of circulation time, leading to lower drag - reduction performance. The molecular degradation is likely to occur at low additive concentrations and low turbulence flow, in vertical piping, since the polymeric additives are exposed to shear stresses.Further attempt was done in present investigation to find correlations for accurately predicting drag - reduction characteristics of drag - reducing agents, used in published works. A published time scale hypothesis for prediction of drag - reduction values, the friction factor data as a function of the polymer concentration, shear stress, Reynolds number, pipe diameter. The experimental friction factor results were taken from a published work for gas oil with polyisobutylenes. Good agreement between measured and predicted friction factor. Further attempt was made to correlate the mechanical degradation ability by modifying the Kouraush, Williams and Watt (KWW) equation. The experimental data were taken from a published work for Polyethylene Oxide. The modified equation was found to fit experimental data better than the original KWW equation.

معالجة الماء الحاوي على النفط في حقول نفط العراق الجنوبية == Oily Water Treatments For Southern Iraqi Oil Fields

اسم المؤلف: عقيل شيخة عرفات
اسم المشرف: خالد مخلف موسى
الموضوع العام: الهندسة الكيمياوية
السنة: 2014
الموضوع الدقيق: الهندسة الكيمياوية
الدرجة: ماجستير
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: عمليات الحفر تنتج كميات كبيرة من الماء الملوث يعرف بالماء المنتج او الماء المنتج من البئر. مختبريا تم التحقق باستخدام Autoclave بحجم لتر واحد مصنوع من مادة الصلب stainless steel لمعالجة الماء المنتج من حقول الرميلة الشمالية والزبير الخطوة الاولى استخدمت م | The oil drilling operations create large quantities of contaminated water known as “Produced Water” (PW), or water that is produced from the well. An experimental investigation was conducted using 1litter stainless steel autoclave to treat the oily water produced from North Rumaila and Zubair oil fields. The first approach was a pretreatment to remove solid particles using sedimentation with and without flocculation. The second approach included studied the effect of pH, pressure, temperature, salinity, operation time, outlet time and RPM. The third approach was investigate the effect of the surfactants (detergents and alcohol) to reduce surface tension, finally, was addition of some sorbents like polypropylene, polyethylene, used plastic and sawdust.The ranges of salinity, pH, pressure and temperature were selected according to the PW conditions which out from dehydrator and desalter (80000 ppm, 6, 3bar and 60°C respectively), the RPM of mixer was selected to satisfy laminar flow, while the time of operation and outlet product represented the minimum residence time in batch reactor and its discharge to choose the minimum design cost. The results showed that the best conditions were : - Pressure =1 bar, temperature =45°C, mixer speed =300 RPM, treating time =15 min and skim time starting =5 minutes. Best additives to reduce surface tension : ethanol volume = 0.05vol %, powder detergent = 400 mg/litter and liquid detergent volume = 0.03vol%. Best sorbents : Sawdust amount addition = 2.5 gm, polypropylene = 4 gm, polyethylene = 3 gm and used plastic = 2.5 gm The results showed that using polymers made a great change in the oil recovery percent (all the oil was recovered).

تقيم كفاءة مزيج مثبط التاكل لمحاكاة مياه التبريد باستخدام القطب الاسطواني الدوار == Evaluation of Corrosion Inhibitors Blend Efficiency For Simulated Cooling Waters Using Rotating Cylinder Electrode

اسم المؤلف: عبير عبد الخالق القصب
اسم المشرف: قاسم جبار سليمان
الموضوع العام: الهندسة الكيمياوية
السنة: 2014
الموضوع الدقيق: الهندسة الكيمياوية
الدرجة: ماجستير
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: تم بحث كفائة مثبط التاكل لمزيج من نتريت الصوديوم / سداسي فوسفات الصوديوم على تاكل الفولاذ الكربوني في محاكاة انظمة مياه التبريد من خلال فقدان الوزن وتقنية الاستقطاب الكهروكيميائية. شملت الدراسة تاثير درجة الحرارة30، 45، 60 ?م، سرعة الدوران 200، 600، 1000 | The corrosion inhibition action of a blend of sodium nitrite/sodium hexametaphosphate (SN+SHMP) on corrosion of carbon steel in simulated cooling water systems (CWS) has been investigated by weight loss and electrochemical polarization technique. The effects of temperature 30, 45, and 60 oC, rotational velocity 200, 600, and 1000 rpm, and salts concentrations (0.005 N, 0.01 N, 0.03 N, 0.05 N) NaCl + 0.0736 N Na2SO4 on corrosion of carbon steel were studied in the absence and presence of mixed inhibiting blend (SN+SHMP). Also, the effects of inhibitors blend concentrations of 600 ppm, and 800 ppm (SN+SHMP), at temperatures of 30, and 60 oC, and rotational velocity of 200 and 1000 rpm, on corrosion rate of carbon steel were studied using Second - order Rotatable Design (Box - Wilson Design) to identify the significant effects and interaction in performing weight loss studies and corrosion potential approach. Electrochemical polarization measurements were used to study the behavior of carbon steel in different salt concentrations of (CWS) with pH of 7.5 in absence and presence of the inhibiting blend. The results showed that increasing the temperature, rotational velocity, and NaCl salts concentration leads to an increase in the corrosion rate for both uninhibited and inhibited solutions. The regression model (Box - Wilson Design) that has been developed using experimental data was used to verify that the interaction term of temperature with inhibitors blend and the square term of inhibitors blend are significant for corrosion rate in 0.05 N NaCl solution while the main variables are not pronounced. Also, it is found that the corrosion rate decreases with increases in inhibitor blend concentration up to 800 ppm in 0.05 N NaCl solution. Inhibitor blend concentration of 600 ppm is highly effective giving a high efficiency in 0.005, 0.01 and 0.03 N NaCl solutions of 98.5%, 97.7%, and 96% respectively. Electrochemical polarization studies show that increasing the inhibitors blend concentration (SN+SHMP) shifts the corrosion potential to more noble value (more positive), indicating the anodic nature of the inhibiting blend used.

تاكل الفولاذ الكاربوني تحت ظروف الخلط في وسط ثنائي الطور لمحلول ملحي مع زيت الغاز وثنائي اوكسيد الكاربون والسيطرة علية بالحماية الكاثودية == Corrosion of Carbon Steel In Stirred Two Phase Media of Brine - Gas Oil And Brine - CO2 And Prevention By Cathodic Protection

اسم المؤلف: ساهر محمد عزيز
الموضوع العام: الهندسة الكيمياوية
السنة: 2014
الموضوع الدقيق: الهندسة الكيمياوية
الدرجة: ماجستير
الجامعة: جامعة النهرين
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: Corrosion tests of carbon steel (CS) in single and two phase media of two immiscible liquids (CaCO3 solution - gasoil mixture) and liquid - gas (CaCO3 solution - CO2 gas) under different operating conditions of temperature, agitation velocity, phase fractions, gas flow rate, and immersion time were carried out using weight loss method and electrochemical polarization technique. Flat blade disc turbine mixer was used to simulate the two phase flow conditions.The ranges of operating parameters in two immiscible phase tests were agitation velocities of (0 - 1200 rpm), temperature of (25 - 45 oC), (1 - 10 vol %) gas oil. The effect of presence of acids such as HCl and H2SO4 on corrosion rate was also investigated under different conditions.Corrosion rate (iL) measurements in CO2 saturated solution were also attained in different operating conditions of temperatures(25 - 45 oC), agitation velocity (0 - 800 rpm), salts concentrations (2.5 × 10 - 3 to 9.9 × 10 - 3M), CO2 flow rate (0.142 to1.132 m3/h ), and immersion time by determining the limiting current density.The pH values, oxygen solubility, and electrical conductivity of tested solutions were measured under all to interpret the obtained result.The results revealed that increasing agitation velocity and temperature leads to an increase of the corrosion rate in single phase brine solution. The corrosion rate in brine - gasoil mixture is irregularly varied with concentration of gasoil and agitation velocity. The limiting current density in single phase CaCO3 increases with the increase in agitation velocity, concentration of brine, and temperature. The corrosion rate in two phase brine - CO2 mixture decreases with the increase of agitation velocity flow rate of CO2, temperature, and immersion time. The corrosion potential of Carbon steel under various conditions were determined and discussed.Cathodic protection was used to protect carbon steel in brine - CO2 mixture by using zinc as sacrificial anode under different operating conditions of flow rate of CO2, agitation velocity, and temperature. Good corrosion protection efficiency was attained.

اداء الحماية الكاثودية لخطوط الانابيب == Performance of Cathodic Protection For Pipe Lines

اسم المؤلف: انس ثائر علي
اسم المشرف: نصير عبود عيسى الحبوبي
الموضوع العام: الهندسة الكيمياوية
السنة: 2014
الموضوع الدقيق: الهندسة الكيمياوية
الدرجة: ماجستير
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: ان تاكل الهياكل المعدنية المدفونة في التربة والتي على اتصال مع التربة لفترة طويلة تعتبر مشكلة هندسية واقتصادية كبيرة.في جميع انحاء العالم هنالك الكثير من انابيب النفط والغاز والماء وكابلات الاتصالات وكذلك صهاريج التخزين والمباني والاسسات والعديد من الهيا | The corrosion of metallic structures buried in soils or in contact with soils has long been a serious engineering and economic problem. All over the world millions of kilometers of gas, water, oil pipelines, communication cables, power cables as well as storage tanks, buildings foundations, and many other structures are buried in the soil, suffering from soil corrosion problems which affect mainly the external surfaces of these structures. In many countries pipelines are by far the most important means of hydrocarbon transportation. This applies to the transport of crude, finished products and natural gas.It is an international problem with more structures and materials buried in the soil. The truly international scope of interest of this subject can be seen by the amount of literature and researches in this field. Attempts have been made to overcome this problem by the use of various types of techniques. The most common and applicable technique is cathodic protection.In this research a carbon steel pipe of length 100 cm buried in a wooden box submerged by soil and impressed current cathodic protection system (ICCP).was applied using power supply and electrical closed circuit, several important factors affecting the pipe protection from corrosion has been studied, like Anode position (distance and depth), soil resistivity (wet and dry), condition the pipe (coated and un - coated), distribution of potential and currents along the pipe(cathode) and the amount of current required to achieve cathodic protection.A correlation was achieved to simulate the ranges of parameters and factors affecting Impressed Current Cathodic Protection. Regression of this model to data and results yielded parameter values vary depending on the effect of the same factor.

تصميم وتنفيذ نظام لاسلكي لمراقبة درجة الحرارة باستخدام الزيجبي ZigBee == Design And Implementation of A Wireless Temperature Monitoring System Using Zigbee

اسم المؤلف: علي حمید توفیق محسن
الموضوع العام: هندسة الحاسبات
السنة: 2014
الموضوع الدقيق: هندسة الحاسبات
الدرجة: ماجستير
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: شبكة الاستشعار اللاسلكية (WSN) ھي عبارة عن مجموعة من العقد يتم تنظيمھا في شبكة تعاونية. لدى كل عقدة في تلك الشبكة قدرة على المعالجة، وتحتوي على ذاكرة، ولديھا جھاز ارسال واستقبال لاسلكي، ولديھا مصدر للطاقة، وتستوعب مختلف اجھزة الاستشعار والمحركات. النظام | A wireless sensor network (WSN) is a collection of nodes organized into a cooperative network. Each node consists of processing capability, memory, RF transceiver, power source, and accommodates various sensors and actuators. The proposed system in this

استخراج الطرق اعتمادا على تقنية الافاعي المنطادية == Road Extraction Based on Balloon Snakes Technique

اسم المؤلف: فراس فاهم عبد الحسن الصكبان
اسم المشرف: محمد احمد المشهداني
الموضوع العام: هندسة الحاسبات
السنة: 2008
الموضوع الدقيق: هندسة الحاسبات
الدرجة: ماجستير
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: ان استخراج الطرق من الصور الجوية وصور الاقمار الصناعية يؤدي دورا مهما في رسم الخرائط وتخطيط يحتاج الى تحديث سريع للطرق (GIS) شبكات الطرق الجديدة. ان التطور الحالي في نظام المعلومات الجغرافية في كل ارجاء الكوكب.خلال العقود الاخيرة طورت الكثير من الطرق الا | The extraction of roads from aerial and satellite images is an important task within cartography and planning of new road networks. The recent developments of the Geographic Information System (GIS) require rapid updates of roads all over the planet. Over

تصميم وتنفيذ ذراع انسان الي لحركة الانسان == Design And Impelementation of Robotic Manipulator For Human Movements

اسم المؤلف: احمد فاضل شنته
اسم المشرف: Mohammed Zeki AL | Faiz
الموضوع العام: هندسة الحاسبات
السنة: 2014
الموضوع الدقيق: هندسة الحاسبات
الدرجة: ماجستير
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: Most human interactions with the environment depend on our ability to navigate freely and to use our hands and arms to manipulate objects. An ideal interface for Humanoid Robotic Operation (HRO) will be person - independent, inexpensive, easy to use, requ

تجزئة الحزمة لالغاء الضوضاء المتكيف في تنقية الاشارة الكلامية == Subband Decomposition For Adaptive Noise Cancellation In Speech Enhancement

اسم المؤلف: حوراء فاضل عبيد
اسم المشرف: منال جميل الكندي
السنة: 2014
الدرجة: ماجستير
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: Nowadays speech processing methods are usually implemented in the time or frequency domain. Filter bank can be considered as a divide and conquer approach within signal processing, since large problems are sub - divided into many smaller problems. While filter banks are essential components of speech processing, and in signal processing in general, they will have the focus in present days. An adaptive filter is a filter that self adjusts its transfer function according to its optimizing algorithms. Least mean square algorithm has slow convergence when used with nonstationary signals like speech and it has high computational cost but normalization of step size (or input signal) leads to a useful variant of the LMS algorithm known as the normalized LMS (NLMS) algorithm, which gives better convergence characteristics than the LMS because it uses a variable step - size with respect to the input signal power.To improve the convergence rate and/or computational complexity and also to overcome the disadvantage of a full band adaptive filtering, a structure is illustrated that is subband adaptive filtering; this will converge faster at a lower computational cost for speech and white noise inputs.This research shows most types of subband decomposition structures and makes comparison among them based on their performance to cancel the noise with minimum computational complexity, maximum convergence speed and maximum noise cancellation with lowest delay.Moreover three new hybrid tree configurations or the tree decom - position are proposed to maximize the overall performance of adaptive noisecancellation system.They are given the abbreviations HTPSAF1,HTPSAF2 and HTPSAF3. These three systems use polyphase filter bank that has showed a noticeable increase in the convergence speed and large reduction in the computational complexity due to the lower number of coefficients that can be achieved for the analysis/synthesis filters, which in turn will result in minimum delay in the reconstructed output speech signal.The algorithm of subband decomposition structures has been described theoretically then modeled under MATLAB simulation program using built - in filters and real input signals.

التشوه بالتوافقيات في اشارات التدفق للمتحسس السعوي الحيزي المثبت خارجيا == Harmonic Distortion In The Flow Signals of Externally Mounted Capacitive Spatial Filter

اسم المؤلف: مروه مالك حسوني
اسم المشرف: عباس احمد الشالجي
السنة: 2014
الدرجة: ماجستير
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: This thesis investigates the performance of some windows on the flow signals that are generated from the planar capacitance spatial filter (PCSF) according to the moving of the solid particle in the channel of the filter. The sensor that operates as non - invasive device for solid flow measurement utilizes the thin wall of a dielectric pipe section as a shielding layer to protect the sensor from erosion, rust and moisture, and to make it more versatile.The finite - difference model equations are solved using successive over relaxation (SOR) methods. The waveforms show that the response of the PCSF is spatially - biased towards particle flowing closer to the plane of sensing electrodes and that the resulting flow signal is non - sinusoidal. The SOR method that is used to compute the PCSF potential fields has been investigated using a mesh of 110 by 32 nodes, and the algorithm was programmed in MATLAB (Release 2013a) using an Intel core ™ i3 PC,CPU processor.To study the effect of the total harmonic distortion (THD) content on the flow signals that are calculated with respect to the fundamental frequency of the power spectrum density through a specific quantitative criterion, this work comprises a comparative study among three types of windows; Hanning, Hamming, and a subOptimal window called the Kaiser window.The effect of particle flying heights, relative permittivity and size on the THD of the flow signal were examined. It was found that theTHD of flow signals at heights closer to the plane of sensing electrodes is high and decreasing gradualy when the particle flying height is far above the sensor. All the three windows used in this work have better suppression of harmonics distortion as compared with unwindowed (raw) flow signal.
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