البحث — المستودع الرقمي العراقي

نتائج البحث: 25 من أصل 5,909

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

الجامعة: جامعة النهرين - كلية الهندسة

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

الجامعة: جامعة النهرين - كلية الهندسة

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

الجامعة: جامعة النهرين - كلية الهندسة

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

الجامعة: جامعة النهرين - كلية الهندسة - قسم الهندسة المدنية

اللغة: الانكليزية

مكان الجامعة: بغداد

الصفحات الاولى:

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

الجامعة: جامعة النهرين - كلية الهندسة - قسم الهندسة المدنية

اللغة: الانكليزية

مكان الجامعة: بغداد

الصفحات الاولى:

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

الجامعة: جامعة النهرين - كلية الهندسة - قسم الهندسة المدنية

اللغة: الانكليزية

مكان الجامعة: بغداد

الصفحات الاولى:

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

الجامعة: جامعة النهرين - كلية الهندسة - قسم الهندسة المدنية

اللغة: الانكليزية

مكان الجامعة: بغداد

الصفحات الاولى:

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

الجامعة: جامعة النهرين - كلية الهندسة - قسم الهندسة المدنية

اللغة: الانكليزية

مكان الجامعة: بغداد

الصفحات الاولى:

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

الجامعة: جامعة النهرين - كلية الهندسة - قسم الهندسة المدنية

اللغة: الانكليزية

مكان الجامعة: بغداد

الصفحات الاولى:

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

الجامعة: جامعة النهرين - كلية الهندسة - قسم الهندسة المدنية

اللغة: الانكليزية

مكان الجامعة: بغداد

الصفحات الاولى:

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

الجامعة: جامعة النهرين - كلية الهندسة - قسم الهندسة المدنية

اللغة: الانكليزية

مكان الجامعة: بغداد

الصفحات الاولى:

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

الجامعة: جامعة النهرين - كلية الهندسة - قسم الهندسة المدنية

اللغة: الانكليزية

مكان الجامعة: بغداد

الصفحات الاولى:

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

الجامعة: جامعة النهرين - كلية الهندسة - قسم الهندسة المدنية

اللغة: الانكليزية

مكان الجامعة: بغداد

الصفحات الاولى:

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

الجامعة: جامعة النهرين - كلية الهندسة - قسم الهندسة المدنية

اللغة: الانكليزية

مكان الجامعة: بغداد

الصفحات الاولى:

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

الجامعة: جامعة النهرين - كلية الهندسة - قسم الهندسة المدنية

اللغة: الانكليزية

مكان الجامعة: بغداد

الصفحات الاولى:

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

الجامعة: جامعة النهرين - كلية الهندسة - قسم الهندسة الكيمياوية

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

الجامعة: جامعة النهرين - كلية الهندسة - قسم الهندسة الكيمياوية

اللغة: الانكليزية

النص الكامل من المصدر: https://nahrainuniv.edu.iq/sites/default/files/Combined_320.pdf

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

الجامعة: جامعة النهرين - كلية الهندسة - قسم الهندسة الكيمياوية

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

النص الكامل من المصدر: https://nahrainuniv.edu.iq/sites/default/files/Combined_321.pdf

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

الجامعة: جامعة النهرين - كلية الهندسة - قسم الهندسة الكيمياوية

اللغة: الانكليزية

النص الكامل من المصدر: https://nahrainuniv.edu.iq/sites/default/files/ANAS%20THESIS%20.pdf

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

الجامعة: جامعة النهرين - كلية الهندسة - قسم هندسة الحاسوب

اللغة: الانكليزية

مكان الجامعة: بغداد

الصفحات الاولى:

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

الجامعة: جامعة النهرين - كلية الهندسة - قسم هندسة الحاسوب

اللغة: الانكليزية

مكان الجامعة: بغداد

الصفحات الاولى:

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

الجامعة: جامعة النهرين - كلية الهندسة - قسم هندسة الحاسوب

اللغة: الانكليزية

مكان الجامعة: بغداد

الصفحات الاولى:

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

الموضوع العام: هندسة الكهرباء والالكترون والاتصالات

السنة: 2014

الموضوع الدقيق: هندسة الالكترونيك والاتصالات

الدرجة: ماجستير

الجامعة: جامعة النهرين - كلية الهندسة - قسم الهندسة الالكترونية والاتصالات

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

الموضوع العام: هندسة الكهرباء والالكترون والاتصالات

السنة: 2014

الموضوع الدقيق: هندسة الالكترونيك والاتصالات

الدرجة: ماجستير

الجامعة: جامعة النهرين - كلية الهندسة - قسم الهندسة الالكترونية والاتصالات

اللغة: الانكليزية

مكان الجامعة: بغداد

الصفحات الاولى: