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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

Author name: احمد علي حسين التميمي

Supervisor name: قاسيون سعد الدين محمد شفيق

General topic: Civil Engineering

Specific topic: Civil Engineering

Degree: Master

University: Al-Nahrain University - College Of Engineering - Department Of Civil Engineering

Language: English

University location: Baghdad

First pages:

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

Author name: فادي لؤي عبو

Supervisor name: Qassun Sa'ad Al | deen mohammed Shafiqu | Raid R, Al | omari

General topic: Civil Engineering

Specific topic: Civil Engineering

Degree: Master

University: Al-Nahrain University - College Of Engineering - Department Of Civil Engineering

Language: English

University location: Baghdad

First pages:

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

Author name: ياسمين نوري خليل البريشة

Supervisor name: Laith Khalid Kamil AL | Hadithy

General topic: Civil Engineering

Specific topic: Civil Engineering

Degree: Master

University: Al-Nahrain University - College Of Engineering - Department Of Civil Engineering

Language: English

University location: Baghdad

First pages:

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

Author name: مثال قدوري علي

Supervisor name: Nabil mohammed Ali hussein | Alaa hussein Abed

General topic: Civil Engineering

Specific topic: Civil Engineering

Degree: Master

University: Al-Nahrain University - College Of Engineering - Department Of Civil Engineering

Language: English

University location: Baghdad

First pages:

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

Author name: رعد شامل فرحان

Supervisor name: احسان علي صائب الشعرباف | عادل عبد الامير العزاوي

General topic: Civil Engineering

Specific topic: Civil Engineering

Degree: Doctorate

University: Al-Nahrain University - College Of Engineering - Department Of Civil Engineering

Language: English

University location: Baghdad

First pages:

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

Author name: عمر شمال فرحان حمد

Supervisor name: Riyadh J.Aziz | Ihsan A. S. AL | Shaarbaf

General topic: Civil Engineering

Specific topic: Structural Engineering

Degree: Doctorate

University: Al-Nahrain University - College Of Engineering - Department Of Civil Engineering

Language: English

University location: Baghdad

First pages:

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

Author name: تقى وليد احمد

Supervisor name: Riyadh J.Aziz

General topic: Civil Engineering

Specific topic: Civil Engineering

Degree: Master

University: Al-Nahrain University - College Of Engineering - Department Of Civil Engineering

Language: English

University location: Baghdad

First pages:

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

Author name: ميس صباح الكفيشي

Supervisor name: Adel A. Al | Azzawiziz

General topic: Civil Engineering

Specific topic: Civil Engineering

Degree: Master

University: Al-Nahrain University - College Of Engineering - Department Of Civil Engineering

Language: English

University location: Baghdad

First pages:

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

Author name: علي فرحان حديد احمد المحمدي

Supervisor name: رياض جواد الموسوي | ليث خالد الحديثي

General topic: Civil Engineering

Specific topic: Civil Engineering

Degree: Doctorate

University: Al-Nahrain University - College Of Engineering - Department Of Civil Engineering

Language: English

University location: Baghdad

First pages:

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

Author name: حسين محمد علي خضير

Supervisor name: Ihasn A.S.Al | sharbaf | Laith KH. Al | Hadithy

General topic: Civil Engineering

Specific topic: Civil Engineering

Degree: Doctorate

University: Al-Nahrain University - College Of Engineering - Department Of Civil Engineering

Language: English

University location: Baghdad

First pages:

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

Author name: احمد عدنان عطشان

Supervisor name: جبار شنشول جمالي

General topic: Chemical Engineering

Specific topic: Chemical Engineering

Degree: Master

University: Al-Nahrain University - College Of Engineering - Department Of Chemical Engineering

Language: English

Full text from the source: https://nahrainuniv.edu.iq/sites/default/files/THESIS_8.pdf

University location: Baghdad

First pages:

Abstract: 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

Author name: عقيل شيخة عرفات

Supervisor name: خالد مخلف موسى

General topic: Chemical Engineering

Specific topic: Chemical Engineering

Degree: Master

University: Al-Nahrain University - College Of Engineering - Department Of Chemical Engineering

Language: English

Full text from the source: https://nahrainuniv.edu.iq/sites/default/files/Combined_320.pdf

University location: Baghdad

First pages:

Abstract: 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

Author name: عبير عبد الخالق القصب

Supervisor name: قاسم جبار سليمان

General topic: Chemical Engineering

Specific topic: Chemical Engineering

Degree: Master

University: Al-Nahrain University - College Of Engineering - Department Of Chemical Engineering

Language: English

University location: Baghdad

First pages:

Abstract: 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.

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

Author name: انس ثائر علي

Supervisor name: نصير عبود عيسى الحبوبي

General topic: Chemical Engineering

Specific topic: Chemical Engineering

Degree: Master

University: Al-Nahrain University - College Of Engineering - Department Of Chemical Engineering

Language: English

Full text from the source: https://nahrainuniv.edu.iq/sites/default/files/ANAS%20THESIS%20.pdf

University location: Baghdad

First pages:

Abstract: 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

Author name: علي حمید توفیق محسن

General topic: Computer Engineering

Specific topic: Computer Engineering

Degree: Master

University: Al-Nahrain University - College Of Engineering - Department Of Computer Engineering

Language: English

University location: Baghdad

First pages:

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

Author name: فراس فاهم عبد الحسن الصكبان

Supervisor name: محمد احمد المشهداني

General topic: Computer Engineering

Specific topic: Computer Engineering

Degree: Master

University: Al-Nahrain University - College Of Engineering - Department Of Computer Engineering

Language: English

University location: Baghdad

First pages:

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

Author name: احمد فاضل شنته

Supervisor name: Mohammed Zeki AL | Faiz

General topic: Computer Engineering

Specific topic: Computer Engineering

Degree: Master

University: Al-Nahrain University - College Of Engineering - Department Of Computer Engineering

Language: English

University location: Baghdad

First pages:

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

Author name: حوراء فاضل عبيد

Supervisor name: منال جميل الكندي

General topic: Electrical, Electronic and Communications Engineering

Specific topic: Electronics and Communications Engineering

Degree: Master

University: Al-Nahrain University - College Of Engineering - Department Of Electronic And Communications Engineering

Language: English

University location: Baghdad

First pages:

Abstract: 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

Author name: مروه مالك حسوني

Supervisor name: عباس احمد الشالجي

General topic: Electrical, Electronic and Communications Engineering

Specific topic: Electronics and Communications Engineering

Degree: Master

University: Al-Nahrain University - College Of Engineering - Department Of Electronic And Communications Engineering

Language: English

University location: Baghdad

First pages:

تحليل الاتصال بين القمر الصناعي والطائرة باستخدام نموذج تعقب الشعاع == Analysis of Satellite - To - Aircraft Communications Using Ray Tracing Model

Author name: علي محمد علي

Supervisor name: جابر سلمان عزيز

General topic: Electrical, Electronic and Communications Engineering

Specific topic: Communications Engineering

Degree: Master

University: Al-Nahrain University - College Of Engineering - Department Of Electronic And Communications Engineering

Language: English

University location: Baghdad

First pages:

تحليل المسار النازل لنظام الاتصال اللاسلكي التكيفي المتعدد المداخل والمخارج والمستخدمين == Analysis of Adaptive Downlink Multiuser Mimo Wireless Communication System

Author name: عمر جبار ابراهیم

Supervisor name: رعد سامي فياض

General topic: Electrical, Electronic and Communications Engineering

Specific topic: Communications Engineering

Degree: Master

University: Al-Nahrain University - College Of Engineering - Department Of Electronic And Communications Engineering

Language: English

University location: Baghdad

First pages:

محاكاة GSM/EDGE وGSM لنظام الاتصالات المتنقلة == Simulation of GSM And GSM/EDGE Mobile Communication Systems

Author name: اسامة علي عبد الله

Supervisor name: رعد سامي فياض

General topic: Electrical, Electronic and Communications Engineering

Specific topic: Communications Engineering

Degree: Master

University: Al-Nahrain University - College Of Engineering - Department Of Electronic And Communications Engineering

Language: English

University location: Baghdad

First pages:

تاثير اللاخطية في الالياف البصرية على اداء نظام تجميع الاطوال الموجية الضوئية المنقسمة باستخدام تقنية الاستقطاب المزدوج لتقسيمات التردد المتعامد الضوئي == Effect of Fiber Nonlinearity On The Performance of WDM Optical Systems Using Dual Polarization CO - OFDM Technique

Author name: بشار مظفر احمد

Supervisor name: رعد سامي فياض

General topic: Electrical, Electronic and Communications Engineering

Specific topic: Electronics and Communications Engineering

Degree: Master

University: Al-Nahrain University - College Of Engineering - Department Of Electronic And Communications Engineering

Language: English

University location: Baghdad

First pages:

الغاء تداخل المسا ارت التخميني في انظمة الوصول المتعدد باستخدام تقسيم الترميز الواسع الطيف لشبكات الاتصال اللاسلكية == Multipath Interference Cancellation Investigation In Wcdma Communication Networks

Author name: نور محمد خليل

Supervisor name: منال جميل الكندي

General topic: Electrical, Electronic and Communications Engineering

Specific topic: Electronics and Communications Engineering

Degree: Master

University: Al-Nahrain University - College Of Engineering - Department Of Electronic And Communications Engineering

Language: English

University location: Baghdad

First pages:

تحسين جودة الصورة التوموغرافية المعاد تركيبها باستخدام خوارزمية التسقيط العكسي المرشحة == Enhancement of Tomographic Image Quality Reconstructed By Filter Backprojection Technique

Author name: دعاء نوفل حازم

Supervisor name: محمد حسين الحياني

General topic: Electrical, Electronic and Communications Engineering

Specific topic: Electronics and Communications Engineering

Degree: Master

University: Al-Nahrain University - College Of Engineering - Department Of Electronic And Communications Engineering

Language: English

University location: Baghdad

First pages: