Search — Iraqi Digital Repository

Search results: 25 out of 7,100

التقدير الحصين لدالة الانحدار باستعمال مزيج الشرائح المبتورة والمقدرات اللبية مع التطبيق == Robust Estimation of the Regression Function Using a Combination of Truncated Splines and Kernel Estimators with Application

Author name: امجد محمد صادق خضر

Supervisor name: لقاء علي محمد

General topic: Administration and Economics

Specific topic: Statistics

Degree: Doctorate

University: University of Baghdad - Faculty Of Administration And Economics - Department Of Statistics

Language: English

University location: Baghdad

First pages:

بناء انموذج هجين لانحدار عملية كاوسين مع التطبيق == Constructing a Hybrid Model for Gaussian Process Regression Along with Application

Author name: احمد هشام محمد طاهر

Supervisor name: مروان عبد الحميد عاشور

General topic: Administration and Economics

Specific topic: Statistics

Degree: Doctorate

University: University of Baghdad - Faculty Of Administration And Economics - Department Of Statistics

Language: English

University location: Baghdad

First pages:

الاسلوب البيزي لتقدير الانحدار التجزيئي لانموذج المتغير الكامن == Bayesian Approach to Estimate Quantile Regression with Latent variable Model

Author name: بلسم مصطفى شفيق

Supervisor name: لقاء علي محمد

General topic: Administration and Economics

Specific topic: Statistics

Degree: Doctorate

University: University of Baghdad - Faculty Of Administration And Economics - Department Of Statistics

Language: English

University location: Baghdad

First pages:

دراسة مطيافية والوصف التركيبي لعناقيد المجموعات النانوية للفضة المنتشرة في وسط السول - جل سيليكا == Spectroscopic study and characterization of Ag+ nanoclusters dispersed in a silica sol-gel host

Author name: تبارك عمار صباح

Supervisor name: فراس جواد كاظم

General topic: Physics

Specific topic: Laser Physics and Electro-optics

Degree: Master

University: University of Baghdad

Language: English

University location: Baghdad

First pages:

Abstract: لخلاصة بالفضة. تمت مطعمة جزيئات ب طعمة م لتحضير مصفوفات هلام – محلول في العمل الحالي ، تم استخدام طريقة ة دراسة معاملات طريقة التحضير من اجل تحديد الظروف المثلى لمصفوف . كما تم ) Dy3+ الديسبروسيوم ( ) Ag الفضة ( - ب طعمة السيليكا الم ة و الفضة النانوية مصفوف تحضير جسيمات الفضة النانوية بطريقة الاختزال الكيميائي. تم استخدام سترات الصوديوم كعامل اختزال. تمت دراسة العديد من المعلمات التي تؤثر على خصائص تحضير الجسيمات . من النتائج التي تم الحصول عليها وجد ان محاليل النانوية ، مثل فترة الاختزال وتركيز ال ر يتطلب فترة اختزال قصيرة وتركيز منخفض. اصغ يمات جس تحضير حجم لوحظ ان فترة وقد xerogels. داخل السيليكا مدمجة تمت دراسة جسيمات الفضة النانوية ال . تم 5 الديسبروسيوم Ag ) - الفضة ( ب المطعمة دقائق وان افضل تركيز لنترات الفضة كان 9 التخفيض الامثل كانت xerogels السيليكا استخدام كلاهما لاحقا لاعداد عينات . (Dy3+ ( كلوريد جسيمات مع على التحليل محلول من عن طريق اذابة الديسبروسيوم هلام بايونات – محلول مصفوفة تطعيم تم Silica xerogels التطعيم المشترك ل . تم Dy3+ مختلفة من بتراكيز الديسبروسيوم جسيمات الفضة النانوية لدراسة تاثير رنين البلازمون السطحي لـ الفضة النانوية لتطبيقات الضوء الابيض. Dy3+ الطيفي لايونات اكدت النتائج التجريبية تكوين جزيئات الفضة النانوية. تم تحديد الحد الادنى لحجم الجسيمات ة اختزال قصيرة وتركيز منخفض. ادى نانومتر مع التوزيع المنتظم عند استخدام فتر 41 البالغ استخدام فترة التخفيض الطويلة والتركيز العالي الى زيادة حجم الجسيمات مع التوزيع غير 144 المنتظم. من نتائج التلالؤ الضوئي ، لوحظت ثلاث قمم انبعاث عند نانومتر 845 و 845 و ) انه تم الحصول على CIE ية ( نانومتر ، واظهرت نتائج مخطط اللون 083 عند الاثارة بمصدر نانومتر. يمكن ان تكون 083 انبعاث ضوئي جيد للضوء الابيض باستخدام طول موجة الاثارة مرشحا واعدا لتطبيقات الضوء الابيض.Ag - Dy3+ ب مطعما السيليكا المشترك xeroge

Summary:

References:

خصائص الاغشية الرقيقة للمركب MEH-PPV المشوب بالمعدن كمتحسس غازي == Characterization of metal doped MEH-PPV Thin films for gas sensor

Author name: نور مثنى جبار

Supervisor name: مصطفى محمد علي حسين

General topic: Physics

Specific topic: Laser Physics and Electro-optics

Degree: Master

University: University of Baghdad

Language: English

University location: Baghdad

First pages:

Abstract: Abstract In this study, optimized thin films were prepared to measure the gas sensor. Thin films of the nanocomposite were prepared from mixing poly(2- methoxy-5-(2'-ethylhexyloxy)-p-phenylenevinylene) (MEH-PPV):Ferric Chloride (FeCl3) with different weight ratios and were prepared by spin coating and drop casting methods. Some physical properties of the thin films of pure MEH-PPV nanocomposite and doping FeCl3 were measured at different weight ratios (0.03wt%, 0.06wt%, 0.09wt% and .0.12wt%). When (FTIR) was measured, it was found that a physical reaction occurred and no chemical one between MEH-PPV and FeCl3. As for the measurement of (FESEM), the pure sample MEH-PPV was homogeneous, but when FeCl3 was added in different weight percentages (0.03wt%, 0.06wt%, 0.09 wt% and 0.12wt%) prominent circles were formed indicating the formation of adsorption and it increases as the concentration percentage increases, and the highest adsorption appears in MEH-PPV:FeCl3 (0.06%). Also, by measuring (EDX), The results demonstrate that there are no unwanted elements in the samples. Some elements were found this may due to the contaminator champers which used to test. It also indicates the presence of small peaks of iron (Fe) and chlorine (Cl). Carbon peaks indicate (C) and oxygen (O) to the presence of the chemical elements of MEH-PPV. And when the (UV-Vis) was measured, Determining the band gap for thin films, where it was found that there are two energy gaps, the first region is Q band, and this was an nonsystematic behavior, and the second region is B band, and here the energy gap increases when the ratio of doping increases. It is noted that the MEHPPV polymer has an absorption peak at the wavelength of 490 nm, and when FeCl3 is added, a blue shift is noticed towards short wavelengths at 453 nm. When the Hall effect was measured, it was found that the conductivity and carrier mobility increase when the doping concentration ratio increases. As well as for the measurement of sensors based on MEH-PPV:FeCl3, a Abstract II noticeable response appeared when the sensor was exposed to H2S gas at a concentration of 25 ppm, where the maximum sensitivity at MEHPPV/FeCl3 (0.06%) was 57.36% at an operating temperature of 175°C with a response time (9sec) and recovery time (55.8sec)

Summary:

References:

التحلية الحفازية للنافثا الخفيفة == Catalytic Sweetening of Light Naphtha

Author name: عباس خلف محمد

Supervisor name: عبد الحليم عبد الكريم محمد | فردوس عبد الغني عبد الكريم

General topic: Chemical Engineering

Specific topic: Chemical Engineering

Degree: Master

University: University of Baghdad

Language: English

University location: Baghdad

First pages:

تشكيل زيت تزييت محرك الكازولين == Gasoline Engine Lubricating Oil Formulation

Author name: محمد فائق محمد

Supervisor name: غياث عبد الرضا رسول | ضياء الدين محمد قاسم

General topic: Chemical Engineering

Specific topic: Chemical Engineering

Degree: Master

University: University of Baghdad

Language: English

University location: Baghdad

First pages:

معالجة زيوت التزييت المستهلكة والخارجة عن الخدمة وتحضير زيت تخليقي == Quality Improvement of Expired and Spent Synthetic Oils and Formulation

Author name: هدى ماجد حسن

Supervisor name: عبد الحليم عبد الكريم محمد | ضياء الدين محمد قاسم

General topic: Chemical Engineering

Specific topic: Chemical Engineering

Degree: Master

University: University of Baghdad

Language: English

University location: Baghdad

First pages:

تحضير عامل مساعد من اطيان الفلنت لانتاج الكازولين المبلمر == solid phosphoric acid catalyst from locally flint clay for gasoline production

Author name: بلسم امجد توماس

Supervisor name: عبد الحليم عبد الكريم محمد | عماد فرج منصور

General topic: Chemical Engineering

Specific topic: Chemical Engineering

Degree: Master

University: University of Baghdad - College Of Engineering - Department Of Chemical Engineering

Language: English

University location: Baghdad

First pages:

ermoxidation stability of narrow fractions of jet kerosine

Author name: yarub mosuluh al-rawi

Supervisor name: abbas h. sulaymon

General topic: Chemical Engineering

Specific topic: Chemical Engineering

Degree: Master

University: University of Baghdad - College Of Engineering - Department Of Chemical Engineering

Language: English

University location: Baghdad

First pages:

تصميم وتنفيذ نظام البريد الالكتروني التابع لمركز السيطرة الوطني == design and implementation of special purpose e-mail service for the ncc

Author name: نادية سعد نوري العاني

Supervisor name: sarcote n. abdullah

General topic: Computer Engineering

Specific topic: Computer Engineering

Degree: Master

University: University of Baghdad - College Of Engineering - Department Of Computer Engineering

Language: English

University location: Baghdad

First pages:

تحضير شحم متعدد الاغراض للاستخدام في ظروف قاسية == fomulation of multi-purpose greases for using under severe conditions

Author name: رنا ثابت الربيعي

Supervisor name: عبد الحليم عبد الكريم محمد

General topic: Chemical Engineering

Specific topic: Chemical Engineering

Degree: Master

University: University of Baghdad - College Of Engineering - Department Of Chemical Engineering

Language: English

University location: Baghdad

First pages:

تحضير طلاء مقاوم لدرجة الحرارة العالية والتاكل لمنظومة التسخين الاولي

Author name: يحيى جواد جاني الخميسي

Supervisor name: سلام كاظم الداوري | مسلط شعبان حسين

General topic: Chemical Engineering

Specific topic: Chemical Engineering

Degree: Master

University: University of Baghdad - College Of Engineering - Department Of Chemical Engineering

Language: English

University location: Baghdad

First pages:

تاثير فصل الاسفلتينات على نوعية زيت الوقود الناتج من النفوط الخام المختزلة == Effect of Asphaltenes Separation on Fuel oil Quality Pproduced from Different Reduced Crudes

Author name: اميل محمد رحمن

Supervisor name: عبد الحليم عبد الكريم محمد | كريم هنيكش

General topic: Chemical Engineering

Specific topic: Chemical Engineering

Degree: Master

University: University of Baghdad

Language: English

University location: Baghdad

First pages:

تشكيل الياف التبادل الايوني الموجبة == Synthesis of Cation-Exchange Fibers

Author name: قيس مثنى اموري

Supervisor name: غياث عبد الرضا رسول | طلال جاسم محمد

General topic: Chemical Engineering

Specific topic: Chemical Engineering

Degree: Master

University: University of Baghdad

Language: English

University location: Baghdad

First pages:

هدرجة نفط خام باي حسن المختزل == Hydrotreating of Bai-Hassan Reduced Crude Oil

Author name: Abdul Selam Keleel Al-Mayah

Supervisor name: Abdullah A. Abass

General topic: Chemical Engineering

Specific topic: Chemical Engineering

Degree: Master

University: University of Baghdad

Language: English

University location: Baghdad

First pages:

تحوير وتشخيص بعض مشتقات الليفوفلوكساسين الحلقية غير المتجانسة الجديدة واختبار فاعليتها الدوائية == Modification and characterization of some new levofloxacin heterocyclic derivatives with screening of its pharmacological effi

Author name: مصطفى مؤيد اربيع

Supervisor name: منى اسماعيل خلف

General topic: Chemistry

Specific topic: Organic Chemistry

Degree: Master

University: University of Baghdad - College Of Science - Chemistry Department

Language: English

University location: Baghdad

First pages:

الكشف عن بعض عوامل الضراة في انواع بكتيريا المكورات المعوية المقاومة للفانكومايسين المعزولة من العينات السريرية == Detection of some Virulence Factors among Vancomycin Resistant Enterococcus Species Isolated from Clinical Samples

Author name: عبد الواحد محسن ظاهر

Supervisor name: اشواق باسم الهاشمي

General topic: Biology

Specific topic: Biotechnologies

Degree: Master

University: University of Baghdad

Language: English

University location: Baghdad

First pages:

Environmental Impact Assessment of Al - Qadisiyah Water Project in Baghdad City, Iraq

Author name: Entesar Shihab Ahmed

Supervisor name: Fikrat Majeed Hassan

General topic: Biology

Specific topic: Life Science

Degree: Higher Diploma

University: University of Baghdad - College Of Science For Girls

Language: English

University location: Baghdad

First pages:

التخثير الكهربائي باستخدام مفاعل الاقطاب النبوبية متحدة المركز لازالة الرصاص من مياه الصرف المحاكاة == Electrocoagulation Using Concentric Tubes Electrodes Reactor for Removal of Lead from Simulated Wastewater

Author name: فرات ياسر شراد الجابري

Supervisor name: Wadood T. Mohammed

General topic: Chemical Engineering

Specific topic: Chemical Engineering

Degree: Doctorate

University: University of Baghdad - College Of Engineering - Department Of Chemical Engineering

Language: English

University location: Baghdad

First pages:

طرائق جديدة للتحليل بالحقن الجرياني المستمر لتقدير بعض الادوية == New continuous flow injection analysis methods for determination of some drugs

Author name: منتظر محمد جبار

Supervisor name: الهام نغيمش مزعل

General topic: Chemistry

Specific topic: Analytical Chemistry

Degree: Master

University: University of Baghdad

Language: English

University location: Baghdad

Abstract: This study evaluated captopril (CAP) for arterial hypertension and chlorpheniramine maleate (CPM) and diphenhydramine hydrochloride (DPH) for allergy symptoms. A homemade measuring cell (Ayah 6S×1-ST-2D Solar Cell CFI Analyzer) was utilized to analyze the precipitate from the medications under review. The study compared the new method to UV-Vis spectrophotometric to assess its efficiency, processed the results statistically, and summarized them in order: Part I: Captopril (CAP) was determined by reacting ammonium cerium(IV) sulfate (ACS) with CAP in an acidic medium to form a white, slightly yellowish precipitate, which was measured by reflecting incident light .The Ayah 6S×1-ST-2D solar cell analyzer was used to optimize physical and chemical parameters. The novel approach had a linear range of 0.07-3.0 mmol/L, a correlation coefficient of (0.9983), and a detection limit of 272.5 ng/25 μl. The RSD% was less than 0.2% for n = 8 CAP concentrations of 0.9, 1.5, and 3.0 mmol/L. The approach recovered captopril from three pharmaceutical tablets from various companies with a recovery rate of 97.1039% to 99.8200%. A comparison was done between the new and classical analysis methods. To analyze UV-Vis spectrophotometry at λmax= 207.2 nm, the standard addition method was used with F-test and paired t-test. The two methodologies showed no meaningful difference with 95% confidence in favor of a homemade tool. Part II: Determination of chlorpheniramine maleate (CPM) involved reacting ACS with CPM in an acidic medium to form a white, slightly yellowish precipitate, which was measured by incident light reflecting off the precipitated particles. Some chemical and physical variables were studied and optimized. The linear range was 0.07-5 mmol/L, with a correlation coefficient (r) of 0.9996 and a limit of detection (LOD) of 195 ng/10 μl. The RSD% was less than 0.2% for n = 8 at 1.0, 1.5, and 4.0 mmol/L CPM. The method estimated drug levels in three prescription pills from various businesses with recovery rates of 98.4625% to 99.2400%. A comparison was done between the new approach and the standard addition method for UV-Vis Sp. at λmax = 261 nm using F-test and paired t-test. The two methodologies showed no meaningful difference with 95% confidence in favor of a homemade tool. Part III: DPH Determination The method involved reacting phosphomolypidic acid (PMA) with DPH in aqueous medium to form a white, slightly yellowish precipitate, which was measured by incident light reflecting off the precipitated particles. Some physical and chemical parameters were studied and improved. The linear range was (0.07-9) mmol/L, with a correlation coefficient (r) of 0.9998, and a detection limit (L.O.D.) of 729.55 ng/50µl for the novel approach. The RSD% was less than 0.2% for n = 8 DPH concentrations of 0.1, 4.0, and 10.0 mmol/L. The procedure was successfully applied to three pharmaceutical tablets from various businesses, showing a recovery rate of 97.7437% to 99.7142%. A comparison was made. Compare the new method to UV-Vis Sp. at λmax = 258 nm using the traditional combination method, including F-test and paired t-test. The two methodologies showed no meaningful difference with 95% confidence in favor of a homemade tool.

Full text:

Summary:

References:

The Role of Womenin Selected Novels of Arnold Bennett

Author name: Ablah Kathem Oda Al-Dujely

Supervisor name: Abdulla Al-Samarrai

General topic: Foreign Languages

Specific topic: English - Literature

Degree: Master

University: University of Baghdad

Language: English

University location: Baghdad

First pages:

دراسة العوامل المؤثرة على انسيابية العامل المساعد ZnO - CuO / γ Al2O3 قبل عملية الكبس == Studying The Factors Effect on The Flowability of ( ZnO - CuO / γ Al2O3 ) Tableting Process

Author name: علي ياسين ناصر

Supervisor name: مالك مصطفى محمد | مازن عبد الهادي راضي

General topic: Chemical Engineering

Specific topic: Chemical Engineering

Degree: Master

University: University of Baghdad

Language: English

University location: Baghdad

First pages:

دراسة للنفي في اللغتين الانكليزية والعربية == a study of negation in english and arabic

Author name: muntaha abdul majeed ali

Supervisor name: khalil i. al-hamash

General topic: Foreign Languages

Specific topic: English - Language

Degree: Master

University: University of Baghdad - College Of Literature

Language: English

University location: Baghdad

First pages:

بعض العوامل المؤثرة على محاصيل العلف :1- تاثير معدلات التقاوى على البرسيم والشعير 2- تاثير الحشر على ارتفاعات مختلفة للبرسم والشعير == some factors influencing the yield of forage grops

Author name: hammoodi radeef

Supervisor name: hilal el-hattab | hussien al-ani

General topic: Agricultural sciences

Specific topic: Plant - Field Crops

Degree: Master

University: University of Baghdad

Language: English

University location: Baghdad

First pages: