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تصميم وتنفيذ معالج باستخدام TM - CFAR مصفوفة البوابات المبرمجة FPGA == Design And Implementation Of TM - CFAR Processor Using Field Programmable Gate Array

Author name: علي هادي عبد الواحد
Supervisor name: وليد خالد عبد علي
Degree: Master
Language: English
University location: Baghdad
First pages:
Abstract: This Thesis proposes on a project whose aim is to implement architectures for CFAR processor employed in radars. These proposed architectures are implemented by using Field Programmable Gate Array (FPGA) technique, with observance of feature desired as flexibility and speed without performance loss. This design written in VHDL Hardware Description Language that can be used to accelerate the implementation. In this thesis, the proposed by design is implemented using MATLAB Simulink on the Trimmed - mean Constant False Alarm Rate Processor(TM CFAR) to obtain system parameters and to test the flow of signal through the system, and then used FPGA devices. FPGA architecture of TM - CFAR processor is implemented to overcome the large processing time required in case of multi - target environment. The use of this technology is suitable because it offers high flexibility in modifying and even developing the required design with a reduction in the required number of hardware and cost. In addition to the main features of the processing chain architectures such as degree of parallelism, small size, accuracy and high computational speed, there is a requirement for generality and adaptively i.e. the ability to handle many different models of operation in different environments. The FPGA implementation of the design is achieved using Xilinx Virtex - II platform as a suitable selected programmable device. The development of the system software for this work has been done using Active HDL 3.5, and ISE Navigator 6.3i programs.

تمييز الاهداف الرادارية وذلك عن طريق استخدام الشبكات العصبية وافضلية الحشد الجزيئي == Radar Target Recognition Using Neural Network And Particle Swarm Optimization

Author name: علي ناظم غالب
Supervisor name: وليد خالد عبد علي
Degree: Master
Language: English
University location: Baghdad
First pages:
Abstract: In the last decades, the pattern recognition and classification are taking an important area of the research. One of the main applications of pattern recognition is the radar target recognition which is vital in radar system.In this this work, a radar signal were used and analyzed for three targets present a contribution is this trend (aircrafts SR - 71, C - 130 and AH - 64), and used as initial data, then variations are made to simulate the target signal variation (50 range profile for each target).A wavelet transform (multi resolution decomposition) is used to reduce the dimensions of radar range profile and then leads to reduce storage and computation.The wavelet transform including two procedures, the first one using approximation and details coefficients as feature extraction, while second procedure use related with the details coefficient only.Artificial Neural Network (ANN) is used as recognizer. The Feed Forward Neural Network (FFNN) and Elman Recurrent Neural Network (ERNN) are used. The network was trained using Supervised Learning Algorithms. The FFNN was trained by (Levenberg - Marquardt (lm), Bayesian regulation (br), particle swarm optimization). The (ERNN) was trained by (lm, br).The best recognition rate of three targets is obtained by using the feature extraction from (normalized details wavelet coefficient) and the ERNN trained by (br). The recognition rate in this procedure is about 96% compare with other methods.When adding the AWGN S/N=5db, the recognition rate reducing to 85%.

تمييز الوجوه اعتمادا على التحويلات الكونتورية ومصنف الشبكة العصبية متعددة الطبقات == Face Identification Based On Contourlet Transform And Multi - Layer Neural Network Classifier

Author name: علي فتاح حسون
Supervisor name: ماهر خضير محمود
Degree: Master
Language: English
University location: Baghdad
First pages:
Abstract: Face recognition plays an important role in many applications like security, banking, access to buildings, and surveillance …. etc.Because of the face image can significantly change due to changing in some factors, such as lighting conditions, facial expression, and others factors, therefore face recognition is still a challenging mission. Useful properties of the Contourlet Transform (CT) are exploited in this thesis to investigate more discriminant features to enhance the face identification performance. In this thesis, a face identification system is suggested based on CT, and Multi - Layer Neural Network (MLNN) Classifier. The main reasons behind using the CT are : First, the CT supports progressive data compression/expansion, hence it is used for image compression. Second, the features in human face are not just horizontal or vertical. CT is utilized for feature extraction because it is a genuine 2D transform that can capture the edge information in all directions. After decomposing an image by CT, low and high frequency coefficients of CT are calculated in different scales and various angles. Most significant information of faces is contained in coefficients, which is important for face identification. The frequency coefficients are utilized as an input feature vector for a neural network classifier. Simple feed forward MLNN neural network is used to achieve the identification process. The network parameters are tuned to optimal values, in order to produce fair comparison between different types of feature vectors. To evaluate the algorithm performance, seven standard databases, and a proposed database are used. Some of them are of high variability, to examine the algorithm robustness against variability. In addition, the proposed algorithm is also evaluated using a generated database composed from five databases. Then the suggested method is compared with other classical feature - based methods such as, wavelet, Principle Component Analysis (PCA), and CT - PCA. The results indicate that the CT - based method has better identification (ID) rate, and is faster than the Wavelet - based and the PCA - based methods. This is due to the high sparsity of the CT and its efficient capability of compression. The ID rates obtained for a tested databases are Japanese Female Facial Expression (JAFFE) database (100%), face 94 database (99.34%), proposed database (98.55%), ORL database (96.5%), Senthil database (92%), Yale database (90%), FERET database (76.2 %), and FEI database (72.57 %), and comparing with other systems, an average identification rate 90.64% for the CT, 85.71% for the Wavelet, 53.92% for the CT - PCA, and 46.7% for the PCA for all tested databases.Moreover, the characteristics of low and high frequency sub bands a are studied with their effect on ID rates. The simulation results indicate that the best identification rates are obtained when using only the low frequency sub - band for all tested databases

استخدام اغشية اوكسيد الخارصين (ZnO) الرقيقة في متحسس لتركيز الهيدروجين من نوع ترانزستور تاثير المجال ممدود البوابة == Zinc Oxide Thin Films - Based Extended - Gate Field - Effect Transistor (EGFET) As Ph Sensor

Author name: علي عزام عبد اللطيف
Supervisor name: رعد حمدان ظاهر | غصون محسن علي
Degree: Master
Language: English
University location: Baghdad
First pages:
Abstract: ظهر في السنوات الاخيرة اهتمام ملحوظ في استخدام متحسسات تركيز الهيدروجين (الرقم الهيدروجيني) من نوع ترانزستور تاثير المجال (FET) في التطبيقات الطبية الحيوية مثل دم الانسان, اليوريا واللعاب لان عملية تصنيع متحسسات تركيز الهيدروجين تتجه نحو التكلفة المنخفضة | In recent years, there is noteworthy interest in using pH - sensors based on Field Effect Transistor (FET) in biomedical applications such as human blood, urine, and saliva because the fabrication of pH - sensors is tending toward low cost, small size, disposable, and real - time measurement. In this work, Extended Gate Field - Effect Transistor (EGFET) pHsensors were built using thin films of Zinc Oxide (ZnO) doped with Palladium (Pd) as sensing membranes. The Pd - doped ZnO thin films with different molar concentrations (Pd = 0%, 2% and 4%) were deposited onto p - type Si(111) substrate by sol - gel method. The surface morphology of the prepared films was imaged and studied by Atomic Force Microscopy (AFM) and Scanning Electron Microscopy (SEM). The crystal structure of the fabricated films was examined by X - Ray Diffraction (XRD) test. The optical and electrical characteristics of the films were measured using spectrophotometer and Hall - Effect measurement device, respectively.The EGFET pH - sensor has been prepared by linking the fabricated sensing devices to the gate terminal of a commercial Metal - Oxide - Semiconductor Field - Effect Transistor (MOSFET CD4007UB).The fabricated sensing devices were immersed in buffer solutions with pH range of (pH 3 ? pH 11). The pH sensing characteristics of ZnO and Pd - ZnO/silicon EGFET devices were studied using Semiconductor Characterization System (SCS - Keithley 4200).The ZnO EGFET sensor exhibits voltage sensitivity and linearity of 31.5 mV/pH and 0.9809 (or 98.1%) in linear regime with pH range of (pH 3 - pH 11). The voltage sensitivity and linearity of Pd - doped ZnO (with 4% molar concentration of Pd) EGFET device in the linear regime with pH range of (pH 5 - pH 11) are 27.86 mV/pH and 0.9785 (or 97.85%), respectively. The experimental results show that the Pd - doped sensing films by sol - gel method cannot be adopted for whole pH range. This means that the doped films have fewer amounts of H+ ions sensing sites at its surface than undoped ZnO fims.

تحليل الاشارات المشفرة ثنائيا باستخدام الترشيح الموائم وغير الموائم لتقليل الفصوص الجانبية == Analysis Of Binary - Coded Signals Using Matched And Mismatched Filtering For Sidelobe Reduction

Author name: صلاح حسن عباس
Supervisor name: اسماعيل محمد جابر
Specific topic: Electrical Engineering
Degree: Master
Language: English
University location: Baghdad
First pages:
Abstract: Various types of binary phase - coded signals are studied in terms of their correlation properties. Then, matched filtering technique as well as mismatched filtering techniques is applied to the codes studied previously in order to reduce the sidelobes of the compressed binary phase - coded signal around the mainlobe, and consequently increase the detection of the received signal. Each filtering technique is performed using programs written by the programming language of MATLAB version 7.4.0.287 (R2007a). White Gaussian noise is introduced in the assessment made to both the filtering techniques and the codes that are adopted in this thesis.The MATLAB programs are tested on various types of binary phase codes that are adopted in this thesis to calculate the criteria to choose the best filtering technique. These criteria are peak sidelobe level, the integrated sidelobe level, and the signal - to - noise ratio loss. Later, the results, which are obtained according to these mentioned criteria, are used to test different filtering techniques on the chosen periodical and aperiodical binary phase codes to choose the best one.It is found that, the optimal peak sidelobe level (PSL) filtering technique is the best filtering technique for the aperiodical binary phase codes in terms of the peak sidelobe level, and in terms of an acceptable signal - to - noise ratio loss. The optimal integrated sidelobe level (ISL) filtering technique comes in the second place.While, it is found that, the mismatched filtering technique is the best filtering technique for the periodical binary phase codes in terms of an acceptable signal - to - noise ratio loss.

تصميم وتحليل هوائيات مغيرة الرقعة للتطبيقات ذات الحزمة العريضة == Design And Analysis Of Slotted Patch Antenna For Wideband Applications

Author name: سيف ناظم غالب الساعدي
Supervisor name: رعد حمدان ظاهر
Degree: Master
Language: English
University location: Baghdad
First pages:
Abstract: The main objective of this work is to design, fabricate and test irregular, diamond wideband microstrip patch antenna which satisfy UWB. A series of parametric study is conducted to show how the characteristics of the antenna depend on the various geometrical and other parameters. These geometrical parameters of the antenna include the dimensions of the patch, feeder and ground plane. Slots are inserted different shapes and sizes in antennas to show which give different bandwidth. The first designed antenna has regular pentagonal patch and 50? microstrip line on one side of dielectric substrate and partial ground plane with square slot on other side. This antenna gives dual bandwidth 2.73 - 7.5 GHz and 8.7 - 20 GHz. This antenna is modified by changing the patch from regular to irregular pentagonal patch with the same area and fixe the other parameter of the antenna. Therefore, the antenna is improved in term of bandwidth and gain, which gives bandwidth of 2.74 - 20 GHz. Many slots with the different shape and size are added to the irregular pentagonal patch to modify this antenna, which makes this antenna have bandwidth of 2.6 - 20 GHz which is suitable for the application that operating in this band. The second design consists of diamond patch and microstrip feed line on one side of dielectric substrate and partial ground plane has square slot on the other side. This antenna is modified by adding three slots in the patch which modifies the gain, so this gives bandwidth of 2.3 - 18.5 GHz. The third design consists of irregular pentagonal patch that is fed by 50? Coplanar Waveguide (CPW) and 4 - step stair added to ground plane is printed on one side of dielectric substrate and c - shape independent piece on other side. This antenna gives bandwidth of 1.48 - 14.2 GHz which is suitable for the applications that operating in this bandwidth. The fourth antenna consist of diamond patch that fed by 50? Coplanar Waveguide (CPW) and 4 - step stair added to ground plane is printed on one side of dielectric substrate and independent piece on other side. This antenna is suitable for the applications which is operate in band of 1.35 - 16 GHz. The design and simulation of the antenna is carried out using CST microwave Studio simulation software.

محول خفض الفولتية المستمرة باستخدام المكثف المفتاحي == Switched - Capacitor Based Step - Down DC - DC Converter

Author name: سؤدد زاحم حسين
Supervisor name: تركي كحيوش حسن
Degree: Master
Language: English
University location: Baghdad
First pages:
Abstract: المحـــــــــــول الخافـــــــــض للــــــــــــفولتيـــــــــة المستمرة ذو المكثف المفـــــــتاحــــــــي (Switched Capacitor DC - DC Converter ) يمكن ان يستعمل للتحويل الكفوء للطاقة حيث نجد انه عندما لا تستعمل المحاثات في دوائر التحويل يؤدي الى خفض حجم | Switched - capacitor (SC) - based step - down DC - DC converter can be used for efficient power conversion when inductors are not used in order to reduce size and cost. In addition, switched - capacitor DC - DC converters are superior to inductor - based converters for high - conversion ratio and wide range of load variation. In this thesis , a multistage current - controlled switched - capacitor step - down DC - DC converter is analyzed , designed and simulated. The converter features are of good regulation capability and continuous input current waveform when two step - down converter cells are connected in parallel and operate in antiphase. Classical SC converter with pulse width modulation technique is also analyzed, designed , simulated. For the PWM converter and current - controlled converter , third - order state - space averaging technique is used for analysis. A fuzzy logic controller is used with the current - controlled converter to obtain fast dynamic response, low ripple in the output voltage and robustness against load and supply variations. A 70W ,48/12V and 12.5W 48/5V converters are designed and simulated ( Matlab/Simulink is used for simulation). The simulation results are obtained and compared for the above converters with different control techniques (PWM ,current control with PI controller and current control with fuzzy controller). The results for current - controlled converters with fuzzy controller show higher efficiency , lower ripples in the output voltage ,fast transient response, good disturbance rejection and very small steady state error of output voltage. In this thesis the value of the output ripple must less than 0.05 V and the efficiency should be more than 75 % for current control mode

نظام الاخفاء الصوري المعتمد على تحويل المويجة والاشارات الفوضوية

Author name: سرى فهمي يوسف
Supervisor name: حكمت نجم عبد الله
Specific topic: Electrical Engineering
Degree: Master
Language: English
University location: Baghdad
First pages:

ترميز القناة المرتكز على الاشارات الفوضوية == Chaos Based Channel Coding

Author name: سراب كمال محمود
Supervisor name: حكمت نجم عبد الله
Degree: Master
Language: English
University location: Baghdad
First pages:

خوارزمية فعالة للسيطرة على التردد اثناء تغيير الحمل في منظومة القدرة == An Effective Algorithm Of Load Frequency Control In Power System

Author name: ساره عباس حسين
Supervisor name: قاسم عبد الرزاق الانباري | عباس حسين مري
Degree: Master
Language: English
University location: Baghdad
First pages:
Abstract: في السنوات السابقة، زادت اهمية تحسين النظام الكهربائي. وان ثبوت التردد هو واحدة من الاشياء التي اثرت في خصائص النظام الكهربائي هي ثبوتية التردد. ولهذه الغاية، وحدة التوليد ملحقة بمسيطر اوتوماتيكي على التردد اثناء تغيير الحمل (LFC) لتنظيم القدرة الفعالة | In recent years, the importance of improving electrical power has been increased. One of the things influenced the characteristic of electrical power is the constancy of frequency. To this end, the generator unit is equipped with an automatic load frequency control (LFC) to adjust the active power produced and restore the frequency and tie line power exchange to their nominal value.The total model of a hybrid power system has a high dimension. The classical design tools are inadequate to cope with all dynamic features. Artificial intelligence techniques are found to be a promising tool to optimally minimize the transient dynamics and control efforts in a load frequency control. This thesis shows the execution of various Artificial Intelligence techniques on the tuning of PID controller in a load frequency control system to compute the PID controller. The techniques of genetic algorithm technique GA, particle swarm optimization PSO and artificial bee colony ABC were applied on four areas, six tie lines power system. The dynamic model was formulated in state variables form. A comparison between these techniques with different performance indices was presented. Results of the test system 1 and 2 were computed and compared. They showed that in test system 2 the load frequency controller can chase the load fluctuation in a short time. The IAE performance index gives an optimum dynamic performance using ABC. From the outcomes, they show that the test system 2 outputs regarding settling time and maximum overshoot were the best performances.

الرؤية المجسمة لتخمين المسافة باستخدام SAD مع مرشح كشف الحواف Canny وتقنيات التعويض == Stereo Vision Distance Estimation Using SAD And Canny Edge Detector With Interpolation Methods

Author name: زيد خضر حسين
Supervisor name: رعد حمدان ظاهر
Degree: Master
Language: English
University location: Baghdad
First pages:
Abstract: Stereo vision system is a technique for finding depth data for digital images.The stereo vision system is used to obtain a 3D data from 2D scene taken by two optical cameras (left and right cameras); the taken images can be used to find the distance of the objects. A number of algorithms for stereo vision system have been developed and the matching algorithms. This work focuses on the traditional algorithms used the Normalized Cross Correlation (NCC), Sum of Absolute Differences (SAD) and the modified version of SAD algorithm. This method is called the Canny Block Matching Algorithm (CBMA) which can find the disparity map. The proposed algorithm contains two parts; the Canny edge detector and Block matching technique with SAD to determine the disparity map and reduce the execution time, the execution time of the CBMA is between (0.35 - 0.43secs) and neglected the effect of the windows size results in the CBMA algorithm. The interpolation method is used which consists of median filter and interpolation techniques (i.e., the most common techniques : bilinear, 1st order and 2nd order polynomial) to enhance the output results images.The error percentage has been reduced about 2% for the disparity map of the CBMA algorithm after used the bilinear interpolation method with block size [3x3] and the execution time is reduced by the step size windows. MATLAB program has been adopted to write the proposed algorithms codes. While, the interpolation techniques has been implemented using in Microsoft Visual Basic (6.0). The camera calibration and image rectification is used to find camera parameters and to simplify the correspondences search. The system was implemented using two identical cameras with baseline (16cm) to detect the distance objects.

تصميم شبكة استشعار لاسلكية متينة لمراقبة استهلاك الطاقة == Robust Wireless Sensor Network For Energy Monitoring

Author name: حيدر عبد الحميد محمد جواد العبيدي
Supervisor name: حكمت نجم عبد الله | طارق محمد سلمان
Degree: Master
Language: English
University location: Baghdad
First pages:
Abstract: There has been a quick development in the Wireless Sensor Network (WSN) field that promises to revolutionize the way people lives. Where they have a wide range of applications especially in the monitoring applications like power consumption, military, and healthcare. This thesis has three objectives. First, to design and implement a prototype of WSN for monitoring power (as well as temperature) in buildings. Second, to investigate the bounds of coverage in different building construction materials. Third, to evaluate the amount of improvement introduced to the ZigBee transceiver when channel - coding methods are used.The basic design elements of the implemented power and temperature monitoring system includes current sensors, temperature sensors, microcontrollers, and wireless transceivers implemented using Global System for Mobile Communications/General Packet Radio Service (GSM/GPRS) platform and ZigBee technology. The use of GSM/GPRS platform allows the user to control or gather information about the system from anywhere just by sending a request using Short Message Service (SMS). In addition, the measured data can be visualized through a user friendly Graphical User Interface (GUI). Many measurements have been done to find the exact limitation of the designed system in terms of coverage and signal strength in the presence of objects of different materials including; cardboard, metal, concrete bricks, wood and corkboard. Furthermore, the MATLAB Simulink model of the proposed ZigBee transceiver uses Convolutional Coding (CC) at different code rates to improve the performance in AWGN channel, Rayleigh and Rician multipath fading channels.The results indicated that the use of ZigBee based WSN in electric power monitoring provides flexibility and helps in reducing power consumption. In addition, the experimental results show that the construction materials of buildings have varying impact on the network performance. At 4m distancebetween the base station and the sensing node, the losses in signal strength are 15, 20, 21 and 32 dBm when using metal as compared with cardboard, corkboard, wood and concrete bricks respectively.It is observed from the simulation results that using convolutional coding in ZigBee transceiver gives better performance than the traditional ZigBee transceivers and that the convolutional code of code rate 1/8 gives the best performance compared to other CC. In AWGN channel and at BER of 10 - 4, the maximum performance improvements in terms of BER obtained over traditional system are 14dB and 13.5dB for OQPSK and BPSK (868 - 900MHz) based ZigBee respectively. While these improvements are 23.5dB, 40.5dB and 19.5dB, 12.5dB in Rayleigh & Rician channels at the same BER respectively.

تصميم وبناء شاحنة بطاريات ذكية لمنظومة القدرة التي تعمل بالالواح الفوتوفولطائية == Design And Implementation Of An Intelligent Battery Charger For A Photovoltaic Power System

Author name: حسين سعود مرض
Supervisor name: عصام محمود عبد الباقي
Degree: Master
Language: English
University location: Baghdad
First pages:
Abstract: ان الهدف الرئيسي من هذه الرسالة هو استخدام الطاقة الشمسية لشحن بطاريات الرصاص الحمضية. تعتبر الشاحنة من اهم اجزاء المنظومة الشمسية وذلك لكون بطاريات الخزن هي الجزء الوحيد المحدود العمر منها. بطاريات التخزين ضرورية في جميع المنظومات الكهربائية الشمسية المس | The main goal of this thesis is to use the photovoltaic (PV) power to charge Lead - acid batteries. The charger is the most important part of the solar system because the only limited - age part of this system is the storage batteries. Storage batteries are essential in all standalone PV power systems. Their efficiency and life time affects significantly the overall PV system performance and economics. The storage battery's effectiveness depends on the charging process. Hence, this thesis deals with the study, simulation and design of an intelligent charger fed by solar system due to the latest technologies.The developed charging method entitled "the decreased charging current based on state of charge" is adopted in this thesis to charge a lead - acid battery. The principle of decreased charging current is to make the real charging current as close as possible to the maximum acceptable current. The advantage of this technique is to mix between the rapidity of charging and prevents of the overcharging and generates gases.The maximum power point tracking (MPPT) technique is adopted to maximize the PV output power, whatever of the temperature and irradiation conditions. The design considers different operating conditions of load, battery state of charge (SOC) and ambient effect in order to achieve the best charging condition of the batteries and to be compatible with the user requirements. The flexible, simple and cheap design is the objective of this charger.This PV charging system is composed of a solar panel, lead - acid batteries, buck converter as power charging circuit and a microcontroller as a control unit.The simulation results are achieved by using Simulink Proteus Isis Professional software. These results demonstrated the validity of the proposed charging technique. The battery charger prototype was tested and the obtained results agree with those obtained from the simulation

اداء التجميع المتعامد لاشارات تقسيم الشفرات المتعدد الوصول ذات الحاملات المتعددة (Rayleigh) عبر قناة الخفوت الترددية الاختيارية من نوع == Performance Of Group Orthogonal Multicarrier Code Division Multiple Access Signal Over Frequency Selective Rayleigh Fading Channel

Author name: حارث اكرم ناصر العبيدي
Supervisor name: مها جورج زيا
Degree: Master
Language: English
University location: Baghdad
First pages:
Abstract: مع ظهور قنوات الخفوت الترددية الاختيارية المتعددة المسارات. اصبح نظام تقسيم الشفرات المتعدد الوصول (CDMA) يعاني من التداخل بسبب تعدد المستخدمين (MUI) والتداخل بين الرموز(ISI) ولكن مع التصميم المناسب لنظام تقسيم الشفرات فانه يوفر التفريق الى مسارات متعدد | In the presence of frequency selective multipath fading channels, code division multiple access (CDMA) suffers from multiuser interference (MUI), and intersymbol interference (ISI), but when properly designed, it enjoys multipath diversity. Orthogonal frequency division multiple access (OFDMA) is MUI free, and it does not enable the available channel diversity without employing error control coding. But coded OFDMA may achieve lower diversity than a CDMA system employing the same error control codes. In this work, the advantages of OFDMA and CDMA are merged to minimize MUI effects, and also to make the maximum available diversity for every user possible, this system is called group orthogonal multicarrier CDMA (GO - MC - CDMA).In group orthogonal multicarrier CDMA (GO - MC - CDMA) scheme, groups of users share a set of subcarriers. By carefully choosing group subcarriers, there is aguarantees that every user transmits with maximum diversity. MUI is only present among users of the same group, and is suppressed via multiuser detection, which becomes practically feasible by assigning a small number of users per group. The performance of GO - MC - CDMA system is analyzed with 3M bits/sec in two paths frequency selective Rayleigh fading channel. Moreover, simulations are carried out to illustrate the performance of GO - MC - CDMA with number of active users, number of subcarriers, space diversity combining technique, types of spreading code, type of data detection techniques, finally, the effect of near - far problem.

تقييم اداء نظام الاتصالات المتعدد المستخدمين المرتكز على متجهات فوضوية متعامدة == Performance Evaluation Of Multiuser Communication System Based On Orthogonal Chaotic Vectors

Author name: بسمة نزار ناظم
Supervisor name: ماهر خضير محمود
Degree: Master
Language: English
University location: Baghdad
First pages:
Abstract: In DS - CDMA systems, the use of orthogonal spreading codes with low cross - correlation values is needed to suppress the effect of multiple access interference (MAI) which increases as the number of active users in system is increased.Currently, the conventional PN sequences, such as (Gold codes, Kasami codes …etc.), generated by linear feedback shift registers (LFSRs) and orthogonal variable spreading factor (OVSF) were used as spreading codes in DS - CDMA system. Using these sequences, it is not possible to increase the number of active users in the system due to the fact that the possible sequences generated in conventional PN - system are limited in number and offer mutual interference as the number of active users is increased due to its non - zero cross - correlation values. The chaotic system can be used to generate very large number of quasi - orthogonal sequences compared with the number of PN sequences due to its sensitivity to initial conditions. Another type of chaotic sequences with zero values of cross - correlation called Orthogonal Chaotic Vectors (OCVs) is generated using chaotic systems and the basic idea of Gram - Schmidt ortho - normalization process.In this work, the use of OCVs in synchronous DS - CDMA system for transmission of data over (AWGN, Flat fading and Frequency selective channels) is introduced. The simulation results show that the DS - CDMA based on OCVs gives better BER performance when spread factor ? is greater than the number of active users due to the reduction of MAI between active users.Results show also that, at BER = - in AWGN channel and for 5 users, there are gain of (0.3, 1.2, 1.75 and 3.75) dB between system based on OCVs and systems based on small set Kasami sequence, Gold codes, large set of Kasami sequence and Non - OCVs respectively. Under the effect of flat fading channel, it can be noted that at BER = - and for 30 user, there is 1.7 dB gain between system based on OCVs and system based on small set of Kasami sequences, and this gain increases to 2 dB for 50 user.Under time invariant frequency selective fading channel and for 8 users at BER= - there is about 6dB gain between the system based on OCVs and system based on Non - OCVs.

تعديل التشويه في الصور الرقمية باستخدام خارطة التشويه والمرشحات الضبابية == Correction Of Deformed Digital Images Based On Deformation Map And Fuzzy Filters

Author name: ايهاب ابراهيم كاظم
Supervisor name: ظافر رافع زغير | محمد علي توفيق
Degree: Master
Language: English
University location: Baghdad
First pages:
Abstract: During the last decades the development in digital image acquisition, capturing, processing and displaying devices is one of the fastest growing fields. Most of these devices introduce some amount of geometric lens deformation and cause uncorrected dimensions in displaying the objects, such as cameras, scanners, lenses, and mirrors.This work introduces a general algorithm use to correct the images deformed by a fixed and known properties sources. A simple prototype system consists of convex mirror and digital camera has been constructed to capture the required reflected scene. The proposed algorithm considers three main processes; correction, filtering, and edge enhancement. The idea of the proposed correction method is based on selecting an original image, capturing its reflected view from the convex mirror, and then obtaining the deformed ratios for each row and column between the captured image and the original image. These ratios represent the raw components to what referred here as the deformation - map. This map is considered as a general pattern for the proposed prototype system, to be used later in correcting the deformed images.The correction process depends mainly on stretching - padding - cropping. In the first operation, each row and column is stretched to a length depends on the corresponding compression ratio's element in the deformation - map. The second operation modifies the size of the image by adding pad array to the end sides, while the third operation crops the image to the required size.The Filtering, and edge enhancement processes are based on using fuzzy median filter to deblur and smooth the corrected images, while fuzzy edge detection is used to enhance the edges of corrected images.The deformation - map has been examined on correcting several deformed images. The results show high capability of considering this map as a general correction model for the images captured by the proposed system.

موثوقية نقل بيانات بمعدل عالي باستخدام متعدد المداخل والمخارج لقناة متعددة المسارات == Reliability Of High Data Rate Using MIMO For Multipath Channel

Author name: ايمان احمد فرحان
Supervisor name: رعد حمدان ظاهر | محمود فرحان مصلح
Degree: Master
Language: English
University location: Baghdad
First pages:
Abstract: The most important type of MIMO is the Spatial Multiplexing (SM) which is used to increase the data rate depending on the number of transmitted and received antennas. The main challenge of SM is high Bit Error Rate (BER) at low Signal to Noise Ratio (SNR), which leads to increase the power expended, and this not match the modern requirements of communication system.In this thesis, the performance of MIMO system for Space Time Block Code (STBC) and SM has been investigated. As expected the STBC increase the reliability of data rate while SM increase the data rate with significant BER. Three types of detection have been experimented with SM; Maximum Likelihood (ML), Minimum Mean Square Error (MMSE) and Zero Forcing (ZF). The results show that ML is outperform each MMSE and ZF, but as it is known the complexity of ML increase exponentially with number of antennas and modulation order. ZF is simple one, but it has poor performance.The proposed system is to add channel code serially with SM and maintain the low complexity. The experiments are begun with Convolution Code (CC) to support SM performance. The results show that significant improvement is achieved using this code with ZF detection, it can be getting more than 10 dB of SNR as code gain. But the payment is the redundancy information which can be reduced by using puncturing technique. Also the complexity of Viterbi decoder grows exponentially with large constraint length. The second code is a Low Density Parity Check (LDPC) code which is proposed with suitable parameters to reduce the required iterations in order to achieve real time application for such system. The results confirm that the proposedscheme is outperform the CC by 3 dB of SNR in addition to acceptable complexity and less number of iterations

الدالة الغامضة للاشارة الرادارية المرمزة == Ambiguity Function Of Radar Coded Signals

Author name: اياد عطيه عبد الكافي الجبوري
Supervisor name: نزار خليل وفي | وليد خالد
Degree: Master
Language: English
University location: Baghdad
First pages:
Abstract: تم دراسة انواع متعددة من تر ميزات الاشارة الرادارية حيث تم التركيز في هذه الدراسة على خواص الارتباط والغموض للتر ميزات. كذلك تم التركيز على تاثير دوبلر على تلك الخواص. تم دراسة تاثير الخطا الطوري والتعيير(Weighting) على خواص تلك الترميزات. الدراسة ال | Various types of coded radar signal are studied in this study in terms of their ambiguity and correlation properties. Doppler effect on the ambiguity and the correlation functions of these codes is studied. The effect of phase error and weighting are presented.The study related to Doppler effect covers the frequency, binary and polyphase codes in terms of the peak signal to sidelobes ratio (PSR).Linear FM, nonlinear FM, binary and polyphase codes with various windows, are dealt with respect to the sidelobes response. The simulator built using Matlab version 6. The simulation consists of a code generator; modulator; white noise adder; received signal with time and frequency shifted; matching filtering; a module to find the Doppler effect on the autocorrealtion function and a module to find the peak signal to sidelobes ratio (PSR). It is found that the m - sequences are the best binary codes in terms of PSR and the P4 code is the best Polyphase code in terms of PSR. Also, it is found that the P4 code provides better Doppler tolerant than the other codes. The m - sequences are very sensitive to Doppler shifts. Concerning the frequency codes : it is found that the nonlinear FM is more sensitive than the linear FM i.e., linear FM is Doppler tolerant while the nonlinear is not. Finally, it is found that the use of time weighting produces a response with extremely low sidelobes

تصميم ومحاكاة نظام اتصالات امن يرتكز على النظام الفوضوي عبر قناة كاوس الضوضائية == Design And Simulation Of Secure Communication System Based On Chaos Over AWGN Channel

Author name: امير كاظم جواد
Supervisor name: حكمت نجم عبد الله | سعد سفاح حسون
Degree: Master
Language: English
University location: Baghdad
First pages:
Abstract: مع زيادة التطور الكبير الذي يحصل في علم الاتصالات ومع وجود قناة عامة (public channel) تنتقل من خلالها المعلومات زادت المشاكل التي تخص القناة وبالخصوص مشكلتين رئيسيتين هما انتهاك الخصوصية ووجود الضوضاء. بخصوص امنية الاتصال : بما ان القناة عامة وبامكان اي م | With the significant development in communication systems especially with the public channel through which information travels, there are increasing in the channels problems. Among these problems, the two important should be addressed are the information security and the noise. In this thesis, an efficient communication system with high security and high immunity against noise has been proposed. From security perspective, the proposed scheme uses two levels of encryption based on chaotic systems. The first level is chaotic scrambling, while the second level is chaotic masking. Two levels of chaos based encryption make information very secure during their transition in the channel because the key space becomes too large. The simulation results show that the Segmental Spectral Signal to Noise Ratio (SSSNR) of the first level (chaotic scrambling) is reduced by - 5.195 dB in comparison with time domain scrambling. In the second level (chaotic masking), the SSSNR is reduced by - 20.679 dB. It is also show that when the two levels are combined, the overall reduction obtained is - 21.755 dB.Concerning the immunity against noise, the proposed system offers three methods to reduce the effect of noise. The first method is based on sending each scrambled sample more than once. The simulation results showed that gain of this method is 10 dB if we send each voice sample 8 times over the classical method without repetition. The second method relies on the conversion of information from analog to digital format before doing the masking. The simulation results of this method show that the mean square error (MSE) is reduced and this reduction increases as signal to noise ratio (SNR) increase. For instance when SNR=10 dB, the MSE is reduced from ?10?^( - 1) to 2*?10?^( - 2) while it reduced from ?10?^( - 2) to 3*?10?^( - 6) when SNR=22 dB. The third method is increasing the power of the information signal relative to chaotic signal. The simulation results show that when the power is duplicated and at SNR = 24 dB, the MSE is reduced from 3*?10?^( - 3) to 0.5*?10?^( - 4) and to 3*?10?^( - 5) when the signal power is tripled.

تصنيع وتوصيف متحسس اشعة فوق البنفسجية باستخدام اغشية اوكسيد الخارصين الرقيقة == Fabrication And Characterization Of ZnO Thin Film Based Uv Photodetectors

Author name: الاء كريم حسن
Supervisor name: رعد حمدان ظاهر | غصون محسن علي
Degree: Master
Language: English
University location: Baghdad
First pages:
Abstract: في السنوات الاخيرة، كان هناك اهتمام متزايد في اشباه موصلات اوكسيد الخارصين للتطبيقات الضوئية ضمن منطقة الاطوال الموجية الفوق البنفسجية وذلك لكون طاقة اثارة الربط كبيرة (60 meV) وطاقة الفجوة الواسعة (3.37 eV) في درجة حرارة الغرفة. في هذا العمل, ثلاث متحسس | In recent years, there has been increasing interest in Zinc Oxide (ZnO) semiconductors for optoelectronic applications in the Ultraviolet (UV) region due to its large exciton binding energy (60 meV) and wide bandgap energy (3.37 eV). In this work, three devices of Metal Semiconductor Metal (MSM) UV photodetectors (PDs) and photoconductors (PCDs) based on ZnO were fabricated in the form of Interdigitated (IDT) MSM structures. The ZnO thin films were prepared by sol - gel spin coating technique, and deposited on a P - type Si and glass substrates. The Nickel (Ni) and Aluminum (Al) contacts were deposited by a vacuum coating deposition technique. The morphological, structural and electrical properties of the ZnO thin films were estimated by using Atomic Force Microscopy (AFM), Scanning Electron Microscopy (SEM), X - Ray diffraction (XRD), four - point probe and Hall effect measurements. Optical bandgap of ZnO film was evaluated using a double beam spectrophotometer. With applied voltage in the range ( - 5 to 5 V), the photocurrent, contrast ratio, gain, responsivity, detectivity, and Noise Equivalent Power (NEP) were estimated. The Photodetectors were illuminated with UV of 254 nm at room temperature (27 °C) and under different levels of optical power ranging between (163.2 ?w ? 172.3?w). Current Voltage (I - V) characteristics were studied and the values of the saturation current (I - s), ideality factor (n), barrier height (? - B), reach - through voltage (VRT) and flat - band voltage (VFB) were extracted under dark condition. Data analysis and curves were plotted using origin software (graphing and data analysis). The AFM and SEM images clearly demonstrate the formation of well - aligned ZnO, with smooth nanometer granular structure, dense and a good morphology. The grain size and average roughness (rms) values were found to be (59 nm, 12 nm) on Si substrate and (31 nm, 2 nm) on glass substrate, respectively.For Ni/ZnO/Ni MSM PD on Si substrate, the device has VRT of (0.56 V) and VFB of (1.5 V). The responsivity and detectivity were estimated to be (1.334 A/W and 3×1011cmHz 1/2 W - 1), respectively. I - s was found to be (8.3×10 - 7 A), n (4.4) and ? - B (0.67 eV). However for Al/ZnO/Al MSM PCDs on Si and on glass substrates, the responsivity and detectivity were (0.45 A/W and 1.2×1011 cmHz 1/2W1) and (0.94 A/W and 2.9×1011 cmHz 1/2 W - 1), respectively.The I - V measurement results obtained indicate that, the Ni/ZnO/Ni MSM PD on Si substrate behaves as a typical Schottky contact and the dominant current transport mechanism is field thermionic emission. However semi linear behavior for Al/ZnO/Al PCD on Si substrate and the current flowing through the junction was following thermionic emission mechanism, while a symmetric I - V behaviors and an excellent linear relationship between the current and applied voltage are observed in both direction for Al/ZnO/Al MSM PCD on glass substrate. The estimated responsivities, detectivities with fairly low dark currents make the diodes attractive for practical UV detector applications

تحسين اداء هوائي فيفالدي باستخدام المواد ما بعد المادية == Vivaldi Antenna Performance Enhancement Based On Metamaterials

Author name: ادهم ربيع عزيز
Supervisor name: زيد اسعد عبد الحسين | طه احمد عليوي
Degree: Master
Language: English
University location: Baghdad
First pages:
Abstract: يتطرق البحث الى المتطلبات الاساسية في الانظمه اللاسلكيه الحديثة والضوابط المتوافقة مع امكانية اعادة التشكيل وقابلية التحديث مما ادى الى ان يصب مجال الدارسة في تحقيق تصميم هوائي يمكن له استيعاب ذلك. في هذه الدراسة، صمم هوائي مطوي على اساس هيكل فيفالدي مع | The urgent demands for a miniaturized, compatible, reconfigurable, updatable, and additive - able wireless communication systems for advanced handle held and portable electronics devices are rarely relaxed due to the inherent antenna limitations. In this study, developing a folded microstrip antenna based on a novel antipodal Vivaldi structure based metamaterial inclusions of single negative properties is proposed for wideband applications. Although, Vivaldi antennas show unlimited bandwidth, an acceptable directivity, small size, light weight and easy to fabricate, but, it suffers from low gain due to traveling surface waves effects and therefore, it cannot be embedded inside the integrated systems ,where, the radiation direction is in the end - fire that limits their use to the outdoor applications. Therefore, a remarkable attention was the first in the literature, is proposed in this thesis by introducing single negative metamaterials to the folded antipodal Vivaldi antenna structure. This work is developed based on a systematic approach which can be divided mainly into four parts : First of all, design a single negative metamaterial structure of a surface area 5×5 mm2 on an FR4 - Epoxy substrate. The unit cell properties are evaluated numerically and analytically, then, compared to the measurement. Second, a systematic approach is applied to design an antipodal Vivaldi antenna based flat profile of a corrugated shape with 50×38 mm2 on the FR4 - Epoxy substrate. Third, the best arrive of the flat geometry is folded on a hello Teflon substrate of an elliptical cross - sectional area. Fourth, the folded antenna structure is surrounded by a U - shaped single negative metamaterial array. The performance of the all proposed antennas are evaluated numerically, then, compared to their measurements in both S11 and radiation patterns. It is found that the antenna bandwidth has affected insignificantly by applying the metamaterial structures. However, with respect to the flat antenna model, the gain is increased generally by 6 dB as well as the radiation pattern is oriented to the broadside. It is worth to mention that the achieved enhancement in the gain is mostly attributed to the folded substrate and the metamaterial introduction. While, the bandwidth enhancement is mostly obtained from the folded antenna structure. The optimum structure shows a first mode around 1.4 GHz and the second one at 2.86 GHz, while, the flat antenna only one mode at 1.5 GHz is appeared.Finally, the HFSS, CST MWS, Matlab and ADS software packages are used in this thesis to study the unit cell performance and the antenna structure. Excellent agreements have been found between the simulated and measured results.

منظومات تضمين العامل المتغير الفوضوي == Chaos Parameter Modulation Schemes

Author name: ابراهيم فهمي علي
Supervisor name: حكمت نجم عبد الله
Degree: Master
Language: English
University location: Baghdad
First pages:
Abstract: في هذه الدراسة, تم تصميم منظومتين من CPM وتم تقييم ادائهما في مختلف قنوات الاتصال. اولا, تم اقتراح تقنية فعالة لتخمين القيمة الابتدائية للاشارة الفوضوية في منظومة تضمين القيمة الابتدائية المسماة M - ary ICM. هذه التقنية سميت ب MACE. هذه التقنية قللت من تع | In this study, two Chaotic Parameter Modulation(CPM) schemes are designed and their performance in different communication channels has been evaluated. Firstly, an efficient technique for initial condition estimation of chaotic signal in M - ary Initial Condition Modulation (ICM) scheme is proposed. This technique has been called Maximum Auto Correlation Estimation (MACE). It reduces the complexity of the demodulator; thereby, it minimizes the hardware implementation cost. Simulation results confirm that, the proposed technique outperforms the conventional technique used in direct sequence spread spectrum quadrature amplitude modulation (DSSS - QAM) system in AWGN channel when high modulation level (M) is used. At BER=10 - 3, 16, 256 ary DSSS - QAM achieve gains in Eb/N0 of about 7dB and 0.8dB in comparison with 16, 256 - ary ICM respectively because the modulation level is low. While 1024, 4096 and 16384 - ary ICM achieve gains in Eb/N0 of about 6dB, 10dB and16.5dB in comparison with 1024, 4096 and 16384 ary DSSS - QAM respectively because the modulation level is high. Furthermore, a modified version of ICM that uses BPSK modulation and one chaotic signals source together with MACE technique is proposed to reduce the implementation cost named as BPSK - ICM scheme. Simulation results confirm that, BPSK - ICM has a comparable BER performance to the DS - SS system in AWGN channel.Secondly, the bifurcation parameter of a chaotic signal has been estimated accurately by utilizing the ergodic properties of a chaotic dynamical signal. In BPSK ergodic chaotic parameter modulation (BPSK - ECPM) scheme, the information signal modulates the bifurcating parameter of the chaotic signal. A mean value estimation technique is used at the receiver to retrieve the original information accurately. This method minimizes the computational complexity of the receiver; thereby, reduces the total implementation cost.Simulation results show that, at BER=10 - 3, BPSK - ECPM scheme achieves gains in Eb/N0 of about 1dB, 1.5dB, 5.2dB, 6.5dB, 9dB, 10 dB and 11 dB, as compared with CSS, CC,FM - DCSK, DCSK,CSK,COOK and QCSK schemes respectively in AWGN channel. While in Rayleigh fading channel, at BER=10 - 3, BPSK - ECPM achieve gains in Eb/N0 of about 4.8dB, 5.8dB, 6.5dB and 11.8dB, as compared with FM - DCSK,CSS,CC and DCSK schemes respectively. Furthermore, BPSK - ECPM scheme outperforms conventional chaotic modulation systems in the presence of synchronization error and high data rate problems. Finally, BPSK - ECPM scheme shows a good recovery performance of image signal in multipath fading channel for intelligent transportation system (ITS).

تطبيق الشبكة العصبية في تكوين الشعاع المتكيف لنظام الهوائي الذكي == Neural Network Application In Adaptive Beamforming For Smart Antenna System

Author name: سليمان احمد غازي
Supervisor name: عضيد حسن سلومي
Specific topic: Electrical Engineering
Degree: Master
Language: English
University location: Baghdad
First pages:
Abstract: انظمة الهوائيات الذكية تعمل على تحسين الاداء وزيادة في السعة لانظمة الاتصالات المتنقلة. ويمكن لانظمة الهوائيات الذكية حل مشكلة نظام الاتصالات المتنقلة مثل التدخل في نفس القناة، والتاخير الحاصل نتيجة الانتشار والمسارات المتعددة التي تاخذها الاشارة عن طريق | The smart antenna systems are promise to provide performance improvement and capacity increasing for the base station of mobile communication systems. Smart antenna systems can solve the problem of mobile communication system such as co - channel interference , delay spread and multipath by an advance signal processing technology called beamforming. In this work artificial neural networks (Feed Forward Neural Network (FFNN) and feedback Elman Recurrent Neural Network (ERNN) ) are used for smart antenna adaptive beamforming for one and multiple targets.Neural network is used to calculate the optimum weights of antenna array to adapt the radiation pattern of the antenna array by directing multiple narrow beams toward the desired users and nulling interference or unwanted users. FFNN and ERNN are trained by supervised backpropagation learning algorithms, FFNN was trained by using Levenberg - Marquardt (lm),Resilient Back - Propagation (Rprop), Gradient descent with momentum and adaptive learning rate (gdx), Gradient descent and adaptive learning rate (gda) and biasing regulation(br), while lm and Rprop are used to train ERNN..The simulation results show that the best performance of smart antenna adaptive beamforming for one and multiple targets is obtained when the NN (FFNN and ERNN) trained by lm algorithm as compared with other algorithms, since it consider the fastest supervised training algorithm but with more memory requirement. Where the performance of FFNN training phase based (lm) algorithm for single target for five element uniform linear array antenna is [2.746641e - 14] at epoch 27 with best validation performance and best test performance approximately equal to the best training performance. While The performance of ERNN training phase based lm algorithm for single target is [1.121938e - 14] at epoch 38 with best validation performance equal to [1.682442e - 14] and the best test performance is [3.363946e - 14].The neural network model in adaptive beamforming are compared with smart antenna adaptive beamforming based on Least Mean Square (LMS) algorithm, and gave better performance than LMS.

تطويرات في انتروبي نظرية المعلومات == Developments of Entropy Information Theory

Author name: نور حسن حميد
Supervisor name: صلاح حمزة عبد البديري
General topic: Mathematics
Specific topic: Mathematics
Degree: Master
Language: English
University location: Baghdad
First pages:
Abstract: انتروبي شانون هو عبارة عن مقياس لعدم التاكدية في المتغير العشوائي ويعرف بالشكل H(x)= - E Ln [f(x)] سيكون هو محور الاهتمام في هذه الرسالة.سيتم في هذه الرسالة تقديم ثلاث تطويرات الاول منها يتمثل بتعديل صيغة GW لتحديد عدد الحدود m الداخلة في تقدير دالة الانت | Shannon entropy is a measure of the uncertainty in a random variable, which is defined as H(x)= - E Ln [f(x)], will be under our consideration. In this thesis, we will introduce three developments, the first one is the modification of GW formula to determ

الحلول المشتركة لمعادلات المؤثر == Common Solutions of Operator Equations

Author name: احمد محمد خلف
Supervisor name: جاسم محمد صالح العزاوي | سالم داوود محسن
General topic: Mathematics
Specific topic: Mathematics
Degree: Master
Language: English
University location: Baghdad
First pages:
Abstract: الهدف من هذا العمل هو دراسة وجود الحل لانواع محددة من معادلات المؤثرات الخطية واللاخطية. وكذلك وبعض الخواص لدالة معادلة المؤثر، وعلى النحو التالي : (1) درست ونوقشت الحلول العامة لمعادلات المؤثرات المقيدة الخطية واللاخطية, وبواسطة معكوس بيسيدو للمؤثرات و| The aim of this work is to study the solvability of some specific types of non - linear operator equations and some properties of mapping of operator equations, also present as following : (1) The solvability of general solutions for bounded non - linea

حول المجموعة الضبابية المفتوحة في الفضاءات التبولوجية الضبابية == on Fuzzy ? - Open Set In Fuzzy Topological Spaces

Author name: غزوان حيدر عبد الحسين
Supervisor name: منير عبد الخالق عزيز الخفاجي
General topic: Mathematics
Specific topic: Topology
Degree: Master
Language: English
University location: Baghdad
First pages:
Abstract: تحقق هذه الرسالة اربعة اهدافالهدف الاول هو دراسة بعض انواع المجاميع الضبابية المفتوحة تدعى (المجموعة الضبابية - ?, المجموعة الضبابية المنتظمة, المجموعة الضبابية - ?, المجموعة الضبابية - ?, المجموعة الضبابية ? ) مع بعض المبرهنات وبعض العلاقات فيما بينها ف | The first objective is to study some types of fuzzy open sets namely (fuzzy ? - open set, fuzzy regular open set, fuzzy ? - open set, fuzzy ? - open set and fuzzy ? - open set) with some theorems on them and some relations between them in fuzzy topologica

دراسة اطياف الامتصاص لبعض الجزيئات اللاعضوية في مناطق اطياف الاشعة فوق البنفسجية والمرئية وتحت الحمراء == Study The Absorption Spectra of Some Inorganic Molecules In UV - VIS - IR Rang of Spectrum

Author name: مريم سمير عبد الستار هاشم
Supervisor name: خالد حسن عبد المعموري
General topic: Physics
Specific topic: Physics
Degree: Master
Language: Arabic
University location: Baghdad
First pages:
Abstract: The study is dealt with inorganic compound molecules of polyatomic ions belong to different point groups. Through our study we made used the FT - IR to study of the vibrational spectra, and UV - VIS Spectroscopy to study and diagnosis the electronic spec

دراسة الخواص البصرية والتركيبية لاغشية Fe?O? : Al المحضرة بطريقة التحلل الكيميائي الحراري == Study of Optical And Structural Propertes of Fe?O? : Al Thin Films Prepared By Chemical Spray Pyrolysis Method

Author name: لمى لفتة راهي
Supervisor name: خضير عباس مشجل
General topic: Physics
Specific topic: Physics
Degree: Master
Language: Arabic
University location: Baghdad
First pages:
Abstract: حضرت اغشية اوكسيد الحديديك ( Fe?O? ) غيرالمشوبة والمشوبة بالالمنيوم (Al) باستخدام طريقة التحلل الكيميائي الحراري على قواعد من الزجاج وبتركيز (0.1) مولاري وبدرجة حرارة القاعدة (400?C) وبنسب حجمية مختلفة %(2,4,6,8).تمت دراسة الخواص التركيبية والبصرية، اذ | In this research Iron Oxide and AL doped Iron Oxide thin films were prepared using Chemical spray pyrolysis technique at (0.1 mol) on glass substrate at a temperature of (400?C) with volumetric concentration (2,4,6,8)%.The optical and structural properti

دراسة تاثير تشبع الاقطاب المغناطيسية اللاتقليدية على الخواص الشيئية == Influnce Investigation of The Unconventional Magnetic Polepieces on The Objective Properties

Author name: محمد جمعة حيدر الشمري
Supervisor name: حسن نوري العبيدي
General topic: Physics
Specific topic: Physics
Degree: Master
Language: Arabic
University location: Baghdad
First pages:
Abstract: في هذا البحث تم اجراء دراسة نظرية - حاسوبية تتضمن جزئين رئيسين. يتناول الاول منهما استخدام انموذج Gauss كدالة هدف في توليف العدسات المغناطيسية ثنائية القطب المتناظرة. افرزت هذه الدالة ثلاث متغيرات امثلية وهي القيمة العظمى لكثافة الفيض المغناطيسي، عرض ال | In this work, a theoretical - computational investingation have been carried out which compramize on two main parts. the first one deals with the using Gauss's model as a target function in synthesize symmetrical double polepieces magnetic lenses. This

تطوير مرشحات رقمية لتحسين الصور الطبية == Adaptive Digital Filters For Medical Images Enhancement

Author name: فلاح عابر بيده البيضاني
Supervisor name: زياد محمد عبود
General topic: Physics
Specific topic: Physics
Degree: Master
Language: Arabic
University location: Baghdad
First pages:
Abstract: تعد الضوضاء المرافقة للصور الطبية من جملة المشاكلات التي تواجه عملية تشخيص الامراض بواسطة هذه الصور، فضلا عن عدم جودة الصور بسبب الاضاءة والتباين المطلوبين، لانها تجعل عملية تفسير الصور الطبية الناتجة وتحليلها عملية صعبة، وتقلل من الفائدة المرجوة منها، ل | The noise accompanying the images medical among the problems faced by the process of diagnosing diseases by these images, as well as the lack of quality images because of the brightness and contrast wanted, they make the process of interpretation and anal

دراسة نظرية لتحديد افضل قدرة مستحصلة في منظومة القدرة التناضحية المفتوحة == Theoretical Study And Optimization of An Open Cycle Osmotic Power Process

Author name: مضر صباح حميد
Supervisor name: عادل عبيد شريف الحسيني | احمد فرحان عطوان
General topic: Physics
Specific topic: Physics
Degree: Doctorate
Language: English
University location: Baghdad
First pages:
Abstract: A great quantity of renewable energy can be potentially generated when waters of different salinities are mixed together. The harnessing of this energy for conversion into power can be accomplished by means of the Pressure Retarded Osmosis (PRO). This tec

الخصائص الميكانيكية الكهربائية والحرارية لمتراكبات البوليمر - انابيب الكاربون النانوية == Polymer - Carbon Nanotube Composites Mechanical, Electrical And Thermal Properties

Author name: فاطمة احمد خلف
Supervisor name: نجيبة عبد الله حسن الحمداني | طارق سهيل نجم
General topic: Physics
Specific topic: Physics
Degree: Master
Language: English
University location: Baghdad
First pages:
Abstract: تعتبر البوليمرات ذات الاساس البوليمري من اهم المتراكبات بسبب قابليتها على الاندماج مع عدد من مختلف المواد. تم التركيز في هذه الدراسة على تطوير ودراسة خصائص متراكبات نانوية متكونة من الراتنج epoxy)) المتصلد حراريا كمادة اساس مضاف اليها الانابيب الكاربوني | Polymer matrix composites (PMCs) are one of the most important composites materials due to their ability to incorporate a number of different materials. This study focuses on development and characterization of thermosetting resin epoxy based nanocomposit

تصنيع وتوصيف خلايا شمسية مرنة == Fabrication And Characterization of Flexible Solar Cells

Author name: علي محسن عبد الحسين اللامي
Supervisor name: زينب عبد السلام الرمضان | فلاح ابراهيم العطار
General topic: Physics
Specific topic: Physics
Degree: Doctorate
Language: English
University location: Baghdad
First pages:
Abstract: تعد الانظمة الفوتوفولتائية من مصادر الطاقة النظيفة والتي بدات تاخذ مساحة مهمة من البحث، ان الاغلبية من الخلايا الشمسية تتميز بكونها صلبة ولم يراعى فيها عامل المرونة, لذا توفر الانظمة الفوتوفولتائية المرنة عدة ميزات في مجال سهولة النقل, مقاومة الكسر وخفة | As a source of clean, remote energy, photovoltaic (PV) systems are an important area of research. The majority of solar cells are rigid materials with negligible flexibility. Flexible PV systems possess many advantages, such as being transportable, unbrea

تحضير ودراسة بعض الخصائص الفيزيائية للمتراكب البوليمري النانوي PMMA/ZrO2 == Prepration And Studay Some Physical Properties of Polymeric Nano Compsite (PMMA / ZrO2)

Author name: نور ظايف حايف
Supervisor name: نجيبة عبد الله حسن الحمداني
General topic: Physics
Specific topic: Physics
Degree: Master
Language: Arabic
University location: Baghdad
First pages:
Abstract: تم في هذا البحث تحضير المتراكبات النانوية للبوليمر المطاوع للحرارة بولي مثيل ميثااكريلايت (PMMA) والمدعم بالجسيمات النانوية اوكسيد الزركونيوم ( ZrO2), وبحجم حبيبي (40 - 50nm) وبكسور وزنية مختلفة) wt%1,1.5,2.5,3,5(0, باستخدام الكلوروفورم كمذيب بطريقة صب ال | In this research, nanocomposites of thermoplastic polymer (Poly Methyl Methacrylate, PMMA) and nanoparticles reinforcement (Zirconium Oxides, ZrO2) have been fabricated with grain size (40 - 50nm) with different weight fraction (0, 1, 1.5, 2.5, 3 and 5 wt

تحضير ودراسة اغشية ZnO : Mn ذات التركيب النانوي بتقنية الترسيب البخاري الكيميائي تحت الضغط الجوي الاعتيادي == Preparation And Study of Nanostructure ZnO : Mn By Atmospheric Pressure Chemical Vapor Deposition Technique

Author name: هبة راشد شاكر
Supervisor name: صلاح قدوري هزاع
General topic: Physics
Specific topic: Physics
Degree: Master
Language: Arabic
University location: Baghdad
First pages:
Abstract: تم في هذا البحث تصميم وتصنيع منظومة الترسيب البخاري الكيميائي عند الضغط الجوي الاعتيادي ذات الجدار البارد محليا, وتشغيل المنظومة للحصول على افضل غشاء بواسطة تغيير ظروف التشغيل من حيث درجة حرارة القاعدة, زاوية ميلان القاعدة, موقع القاعدة داخل المنظومة, ك | In this research, atmosphere pressure chemical vapor deposition system, with cold wall has been designed and locally manufactured. This system operated to get the best thin film by changing the conditions of performing such as; substrate temperature, slop

دراسة تاثير السمك والتركيز على الخصائص الكهربائية والبصرية لـ بولي مثيل ميثاكريلات المشوب بملح التيتانيوم TiCl3 == Study The Influnce of Concentration And Thickness on Electrical And Optical Properties of PMMA / Ti Cl3 Salt Composite

Author name: فاضل تركي معن
Supervisor name: زينب عبد السلام الرمضان
General topic: Physics
Specific topic: Physics
Degree: Master
Language: Arabic
University location: Baghdad
First pages:
Abstract: تم في هذا البحث تحضير البوليمر بولي مثيل ميثاكريلات PMMA العازل اللدائني الشفاف بعملية بلمرة الاضافة الحجمية بواسطة الجذور الحرة باضافة البادئ بنزول بيروكسايد الى المونومير MMA.تم قياس اللزوجة باستخدام جهاز قياس اللزوجة عن طريق اخذ تراكيز مختلفة من النمو | In this research, The preparation of poly methyl methacrylate PMMA (the transparent plastic insulator) by polymerization the added volume by free radicals after adding the initator Benzoyl peroxide to the MMA monomer. The viscosity were measured by viscom

دراسة الخصائص البصرية والتركيبية لاغشية cdo الرقيقة المحضرة بطريقة الترسيب بالحمام الكيميائي == Study The Optical And Structural Properties of CdO Thin Films Prepared By Chemical Bath Deposition Method

Author name: كرار مهدي صالح
Supervisor name: فاطمة ياسين محمد
General topic: Physics
Specific topic: Physics
Degree: Master
Language: Arabic
University location: Baghdad
First pages:
Abstract: حضرت اغشية اوكسيد الكادميوم (CdO) الرقيقة من مادة كلوريد الكادميوم المائية (CdCl2.2H2O) ذات الوزن الجزيئي (201.33g/mol) وبتركيز مولاري (0.1M) على قواعد زجاجية بدرجة حرارة الغرفة(RT) بطريقة الترسيبب بالحمام الكيميائي. وقد تم دراسة تاثير السمك (t=127.35,241 | Thin films of cadmium oxide (CdO) have been prepared from 0.1M Cadmium Chloride dehydrate (CdCl2.2H2O) with molecular weight 128.4g/mol on glass substrates at room temperature (RT) by chemical bath deposition method (CBD). The influence of thickness (t=12

الخواص التركيبية والبصرية لاغشية Fe2O3 - NiO المحضرة بطريقة التحلل الكيميائي الحراري == The Structure & Optical Properties of (Fe2O3 - NiO) Thin Films Prepared By The Chemical Spray Pyrolysis

Author name: نورا جاسم محمد جبر
Supervisor name: نادر فاضل حبوبي
General topic: Physics
Specific topic: Physics
Degree: Master
Language: Arabic
University location: Baghdad
First pages:
Abstract: حضرت اغشية اوكسيد الحديديك ( Fe2O3 ) واغشية اوكسيد الحديديك الممزوجة باوكسيد النيكل NiO)) من المحاليل المائية لكلوريد الحديد الثلاثي (FeCl?.6H2O) وكلوريد النيكل (NiCl2.6H?O) بنسب مزج (% 10,20,30,40,50) بطريقة التحلل الكيميائي الحراري على قواعد زجاجية بدرج | Ferric Oxide (Fe2O3) and Nickel oxide (NiO) Mixed with Ferric Oxide thin films were prepared from an aqueous solution of [FeCl¬3.6H2O] Nickel chloride [NiCl2.6H?O] in volumetric concentration (10,20,30,40,50%) by chemical spray pyrolysis method onto glass

تصميم مضخة هجينة شمسية - جيوحرارية == Design of Hybrid Solar - Geothermal Heat Pump

Author name: علاء حسين شنيشل السوداني
Supervisor name: احمد فرحان عطوان | نصير كريم قاسم السوداني
General topic: Physics
Specific topic: Physics
Degree: Doctorate
Language: English
University location: Baghdad
First pages:
Abstract: مصادر الطاقة التقليدية مضرة بيئيا على العكس من مصادر الطاقة المتجددة. سعى العالم سوية في نهاية القرن الماضي الى تشخيص مشاكل تغير المناخ الذي ادى بدوره الى التفكير في سبل حفظ الطاقة والتقليل من الانبعاثات. تعتبر طاقة الجيوحراري (Geothermal energy) من الطاق | Conventional energy resources are environmentally harmful unlike renewable energy resources. At the end of the last century the world came together to address the problems of climate change; which led to the thinking of ways to conserve energy and reduce

الخزن الموسمي للطاقة الشمسية الحرارية : دراسة نظرية == Theoretical Study of Seasonal Storage Thermal Solar Energy

Author name: فاضل محمود عليوي
Supervisor name: احمد فرحان عطوان | نصير كريم قاسم السوداني
General topic: Physics
Specific topic: Physics
Degree: Master
Language: English
University location: Baghdad
First pages:
Abstract: يتناول هذا البحث تخزين الطاقة الشمسية الحرارية الفائضة في فصل الصيف ( من ايار الى تشرين الاول) في داخل التربة، للاستخدام لاحقا ( في فصل الشتاء) للحد من استهلاك العالي للطاقة المستخدمة وكذلك لتقليل انبعاث غاز ثاني اوكسيد الكاربون. استخدم نموذج شبه ثلاثي ال | This research deals with storage of the thermal solar energy in the soil in summer season (from May to October) for latter utilization (in winter) for reduce the energy consumption. The quasi - three - dimensional model and finite line source model are us

دراسة تاثير البروبايويك في تكوين الغشاء الحيوي وانتاج البروتيز لبكتريا Pseudomonas aeruginosa المعزولة من اخماج الحروق والجروح == Study The Effect of Probiotic On Biofilm Formation And Production Protease Enzyme By Pseudomonas Aeruginosa Isolated From Contaminated Burns And Wound

Author name: علا عبد الكريم كاظم النعيمي
Supervisor name: منيرة جلوب اسماعيل العبادي | ضيماء محمود ابراهيم
General topic: Biology
Specific topic: Microbiology
Degree: Master
Language: Arabic
University location: Baghdad
First pages:
Abstract: he study includes the collection of 70 burns and wound swabs from patients of different hospitals, in Baghdad area, for the period from November 2013 to February 2014. 2) 31 isolates characterized as Pseudomonas aeruginosa 9 (45%) from wound and 22 (78.57%) from burn swabs, depending on the characteristics of the colonies phenotypic and microscopic when grown in differential selective media, as well as biochemical tests todiagnose isolates, Then the identification of these species were confirmed by using the system (GN I Card) using Vitek 2 device complementary step.3) The study includes sensitivity test towards 16 antibiotics for each species by using the system (AST Card) using Vitek 2 device, and the isolates ware Multi drug resistance, As results all isolates were resistant by 100 % for each of Piperacillin, Ticarcillin, Ticarcillinclavoulanic acid, Cefazolin, Ceftriaxone and Tigecycline. All strains were less resistance to Ceftazidime with percentage 50%. 4) All the isolates of Pseudomonas aeruginosa with percentage %100, have ability to produce protease enzyme.5) This study was use tow methods of biofilm formations seen in P. aeruginosa, Micro - titer plate method (MTP) and Tube method (TM), Results revealed that MTP was found to be more sensitiveand specific method for biofilm detection than TM. 6) Well diffusion method revealed the inhibitory effect of bacteria Lactobacillus acidophilus, Lactobacillus rhamnosus GG and its supernatants in the growth of bacteria Staphylococcus aureus and P. aeruginosa, and was the supernatant of L. rhamnosus GG isthe largest inhibitory effect on the growth of S. aureus and P.aeruginosa with inhibition diameter 32 and 34 mm respectively, while the inhibition of growth by supernatant of L. acidophilus diameter 25 and 27 mm respectively. 7) Estimated the amount of protein in each of the biosurfactant and bacteriocine producers of L. rhamnosus GG bacteria concentration of 74, 54 Mg/mL respectively, while their concentration in bacteria L. acidophilus 44, 40 Mg / mL, respectively.8) Found that the bacteriocine product of bacteria L. rhamnosus GG and L. acidophilus GG have inhibitory effect on ability of P. aeruginosa to produce the enzyme protease, and the absence of this effect in the Biosurfactants the product of these two types.9) The biosurfactant product from L. rhamnosus GG showed inhibitory effect greater than the effect of the biosurfactant product from L. acidophilus to inhibition (production of biofilm and adhesion to epithelial cells).10) studied the suspension's effect of L. acidophilus and L. rhamnosus GG in contrived injuries wounds in mice contaminated with P. aeruginosa, Positive results have been shown to be affected by the contaminated bacteria injuries wounds.

دراسة تصنيفية لحشرات عائلة الخنافس الرواغة Staphylinidae : Coleoptera في بعض محافظات العراق

Author name: كاظم عادل هادي
Supervisor name: سعدون ابراهيم اسماعيل
General topic: Biology
Specific topic: Zoology - Insects
Degree: Master
Language: Arabic
University location: Baghdad
First pages:

دراسة مقارنة للتاثير السمي للزنبور الاحمر Vespa Orientalis L والزنبور الاصفر Polistes Olivaceaus (De Geer) (Hymenoptera : Vespidae على تحلل كريات الدم الحمراء والتخثر لدى الانسان == Poison Effects of Red Wasp Vespa Orientalis L. And Yellow Wasp Polistes Olivaceaus (De Geer) (Hymenoptera : Vespidae) On The Decomposition of Red Blood Cells And Coagulation In Humans

Author name: شهد فلاح عباس
Supervisor name: سعدون ابراھیم اسماعیل | محمد عبد الرزاق الصوفي
General topic: Biology
Specific topic: Zoology - Insects
Degree: Master
Language: Arabic
University location: Baghdad
First pages:
Abstract: To study the impact of toxic of the the Red Wasp Vespa orientalis L. and yellow wasp Polistes olivaceaus (De Geer) from family (Vespidae) the decomposition of red blood cells and clotting in humans. Were collected 508 insect Red wasp was where the number of workes 390 insect the yellow wasp gathered 539 insect where the number of worker 418 insect, and the diagnosis was confirmed based on the taxonomic keys and professors speclalized in the natural history museum and then extracting machine stinging for poisonWasp red and yellow toxin were purified by gel filtration throw Sephacryl S - 200 were obtained on three peaks of proteins, and when estimated the activity of lysis and clotting for peaks separate P1, P2 and P3 for wasp red toxin, the lysis activity of separate P1 was 98% of the poison origin activity and the clotting time was 47.3 minutes, while the lysis activity of separate P2 was 62% of the poison origin activity and the clotting time was 27.53 minutes, and the lysis activity of separate P3 was 29% of the poison origin activity and the clotting time was 13.67 minutes, so P1 separate from Wasp red poison was selected to purification and study the molecular characteristics, while when estimated the activity of lysis and clotting for peaks separate P1, P2 and P3 for wasp yellow toxin, the lysisactivity of separate P2 was 91% of the poison origin activity and the clotting time was 43.8 minutes, while the lysis activity of separate P1 was 49% of the poison origin activity and the clotting time was 19.28 minutes, and the lysis activity of separate P3 was 29% of the poison origin activity and the clotting time was 7.52 minutes, so P2 separate from wasp red poison was selected to purification and study the molecular characteristics The molecular weight of wasp red and yellow toxin the protein cm wasp red toxin P1 was 22387 Da and wasp yellow toxin P2 was 22382 Da using the gel filtration Sephacryl S - 200, while the carbohydrates content were 60.057 and 44.460 mg/ ml for wasp red P1 and yellow P2 toxin respectively as determined by phenol - sulfuric acid method, and type of link between carbohydrates and protein in the separate P1 and P2 investigating by using gel filtration Sephacryl S - 200 and absorbance at 280 and 490 nm.The percentage of iron in wasp red P1 and yellow P2 toxin were 0.88 and 0.44 ppm respectively as determined by atomic absorption, the contain proteins separate P1 and P2 on the iron were investigating by using gel filtration Sephacryl S - 200 and absorbance at 280 and 557 nm. The optimum pH of lysis and clotting activity for wasp red toxin P1 was 6.5, while lysis activity was decrease in pH 4 and 8 to be 38 and 79% respectively from its original activity, and clotting time was decreased from 47.3 min at optimum pH to be 17.9 and 37.3 min at pH 4 and 8, respectively, it was noted that wasp red toxin P1 was constant in the pH range of lysis activity from 6 - 7.5, but it lost 67 and 25% from its original activity at pH 4 and 8 respectively, while the clotting time was constant in the pH range from 6 - 7.5, but it decreased in pH 4 and 8 to be 15.6 and 35.4 minutes respectively The optimum pH of lysis and clotting activity for wasp yellow toxin P2 was 6.5, while lysis activity was decrease in pH 4 and 8 to be 18 and 37% respectively from its original activity, and clotting time was decreased from 48.8 min at optimum pH to be 8.7 and 35.6 min at pH 4 and 8 respectively, it was noted that wasp red toxin P2 was constant in the pH range of lysis activity from 5.5 - 8, but it lost 74 and 19% from its original activity at pH 4 and 8 respectively, while the clotting time was constant in the pH range from 6 - 7.5, but it decreased in pH 4 and 8 to be 12.6 and 39.5 minutes respectively The results for optimum stability temperature of lysis and clotting activity for wasp red toxin P1 refer to increase activity by increasing the action temperature until it reached a maximum at a temperature 35oC, then lysis activity was decreased to be about 4% of its original activity at 80oC, while the clotting time was decrease from 48.8 minutes at the optimum temperature to be 1.8 minutes at 80oC, it was noted that the lysis and clotting activity were stabile at 35oC for 30 min, but it is beginning to decrease with increasing temperature to loses 84% of its original lysis activity at 80oC, and the clotting time was decreased from 47.3 min at 35oCto be 2.3 min at 80oC.The results for optimum stability temperature of lysis and clotting activity for wasp yellow toxin P2 refer to increase activity by increasing the reaction temperature until it reached a maximum at a temperature 35oC, then Lysis activity was decreased to be about 8% of its original activity at 80oC, while the clotting time was decrease from 48.8 minutes at the optimum temperature to be 3.9 minutes at 80oC, it was noted that the lysis and clotting activity were stabile at 35oC for 30 min, but it is beginning todecrease with increasing temperature to loses 98% of its original Lysis activity at 80oC, and the clotting time was decreased from 48.8 min at 35oC to be 5.3 min at 80oC.The results refer to found a relationship between the influence of the wasp type and dose on the red blood cells lysis degree in males and females, it was observed that the concentration had a significant effect (p<0.05) in the red blood cells lysis degree in females, it was 0.401 at concentration 100% for wasp red toxin P1, while it was 0.331 at the same concentrate for wasp yellow toxin P2, the concentration also had a significant effect (p<0.05) in the red blood cells lysis degree in males, it was 1.020 at concentration 100% for wasp red toxin P1, while it 0.842 at the same concentrate for wasp yellow toxin P2, also it refer to found a significant effect (p<0.05) between the effect of the wasp red P1 and yellow P2 toxin and dose on the red blood cells clotting time in females, itwas 46.80 min at concentration 100% for wasp red toxin P1, while it was 46.20 min at the same concentrate for wasp yellow toxin P2, the concentration also had a significant effect (p<0.05) in the red blood cells clotting time in males, it was 47.80 min at concentration 100% for wasp red toxin P1, while it 40.47 min at the same concentrate for wasp yellow toxin P2, there was no significant effects for blood clotting time when making a comparison between the wasp red P1 and yellow P2 toxin for eachconcentration in females and males. The compared between red blood cells clotting time due the wasp red P1 and yellow P2 toxin dose in females and males did not refer to found a significant effect (p<0.05), the clotting time for wasp red P1 was 46.80 and 47.80 min at concentration 100% for females and males respectively, while the clotting time at concentration 6.25% was 17.30 and 17.10 min for females and males respectively, whilst the clotting time red blood cells due wasp yellow P2 toxin in females was 46.20 min and 47.40 min in males at concentration 100%, and it was 17.00 min in females and 17.10 min in males at concentration 6.25%.

دراسة تصنيفية لعويلة الخنافس البرغوثية Alticinaeمن عائلة Chrysomelidae ورتبة غمدية الاجنحة Coleoptera في بعض محافظات العراق == Taxonomic Study On The Flea Beetles (Coleoptera : Chrysomelidae : Alticinae) In Some Provinces of Iraq

Author name: رغد عـبيد خضير
Supervisor name: سعدون ابراهيم اسماعيل
General topic: Biology
Specific topic: Life Science
Degree: Master
Language: Arabic
University location: Baghdad
First pages:
Abstract: تناول البحث لهذه الرسالة دراسة تصنيفية لعويلة الخنافس البرغوثية Alticinae في بعض محافظات العراق، علما ان هذه العويلة لم تدرس تصنيفيا في العراق.اختير النموذج Longitarsus ballotae Marsham. لتجسيد صفات العويلة. ولقد درست الاجزاء الرئيسة للجسم وهي الراس والص | The Subject of thesis is a taxonomic study of Subfamily Alticinae in some provinces of Iraq. Knowing that this Subfamily has not been studied taxonomically in Iraq.Was chosen as the model for Longitarsus ballotae Marsham. To embody the gualities of the Subfamily. The detailed study of the head, thorax, abdomen and their appendages was made to evaluate the reliability of the external characters in classifying the species of the Subfamily.There are eight genera and thirteen species for these Subfamily The species are : - Altica deserticola Weise.Aphthona fuentei Reitter.Aphthona sp. Chaetocnema montenegrina Heikertinger.Chaetocnema persica Baly. Epitrix atropae Foudras.Hermaeophaga ruficollis Lucas.Longitarsus ballotae Marsham.Longitarsus membranaceus Foudras.Longitarsus reichei Allard. Longitarsus succineus Foudras.Phyllotreta nemorum Linnaeus.Podagrica fuscicornis Linnaeus.6 Species Register in Iraq are : - Chaetocnema montenegrina Heikertinger.Epitrix atropae Foudras. Longitarsus succineus Foudras.Longitaarsus membranaceus Foudras.Podagrica fuscicornis Linnaeus.Two species Taxonomic keys were designed and developed to is olate the genera of Subfamily Alticinae, sa wellas the genera mentioned and studied in this thesis for each species.

كفاءة التنظيف لمبرد XP - endo Finisher بالمقارنة مع انظمة الارواء بالتردد الصوتي والتردد فوق الصوتي : دراسة خارج الجسم == Cleaning Efficiency of Xp - Endo Finisher File In Comparison With Sonic And Ultrasonic Irrigation Systems (An In Vitro Study)

Author name: مهند غازي عزاوي
Supervisor name: جمال عزيز مهدي
General topic: Dentistry
Specific topic: Dental Treatment
Degree: Master
Language: English
University location: Baghdad
First pages:
Abstract: This in vitro study was conducted to evaluate and compare the efficiency of XP - endo Finisher, EndoActivator sonic irrigation system and the NSK Varios ultrasonic irrigation system in removing dentin debris at three levels of root canals and to compare the percentage of dentin debris among the three levels for each irrigation system. Sixty freshly extracted upper molar teeth with straight palatal root canals were used in this study. All canals were prepared with ProTaper NEXT rotary files to size X4, 1mm from the anatomic apex with irrigation of 1 ml 2.0% NaOCl between the files. After that the samples were randomly distributed into three groups of twenty samples each, irrigated with 1 ml 2.0% NaOCl, followed by irrigant activation for 60 seconds with three different irrigation systems; group one, by using the XP - endo Finisher; group two, by sonic irrigation using the EndoActivator system; and group three, by ultrasonic irrigation using the NSK Varios, then all the groups received a final rinse of 5 ml 2.0% NaOCl. After the final rinse, the roots were split longitudinally into two parts and photographed with a professional digital camera. The digital images were then transferred into a computer and opened in Adobe Photoshop CC 2015 software and the canal was magnified 200x. The percentage of dentin debris remaining at the apical level (0 - 3mm), the middle level (3 - 6mm) and the coronal level (6 - 9mm) was calculated by dividing the number of pixels occupied by the dentin debris at each level by the number of pixels representing the entire canal area. Data were analyzed statistically by ANOVA and LSD at 1% and 5% significant levels. This study showed that cleaning the canal with the XP - endo Finisher or NSK Varios ultrasonic irrigation system resulted in significantly cleaner canals (P<0.01) than the EndoActivator sonic activation system at all canal levels. The XP - endo Finisher resulted in cleaner canals than the NSK Varios ultrasonic irrigation system at all levels, but the difference is not statistically significant (P>0.05). The apical level of all the canals showed a greater amount of dentin debris (P<0.01) compared to the middle and coronal levels, regardless of the irrigation device used.

تحليل القوى المستقرة لثلاثة انواع مختلفة من المواد الراتنجية بطريقة عملية وعددية == Static Stress Analysis For Three Different Types of Composite Materials Experimentally And Numerically

Author name: محمد وائل سعيد
Supervisor name: حكمت عبد الرحيم الغراوي
General topic: Dentistry
Specific topic: Dental Treatment
Degree: Master
Language: English
University location: Baghdad
First pages:
Abstract: t is important to analyze and compare the stresses induced in different composite material types during load application to know which type of composite will behave as preferred under the loading in the same circumstances. This study aimed at measuring and comparing the stress induced in Filtek ™ Z350 XT (3M ESPE) composite, Tetric EvoCeram ® (ivoclar vivadent) composite and BRILLIANT ™ NG (Coltène/Whaledent) composite experimentally and numerically.Experimental analysis included cavity preparation in the Brass block with a concave (U - shape) cavity which represent a proximal cavity preparation. This cavity was used as a mold for sample preparation. The internal line and point angles of the cavity (mold) were rounded and the dimensions of the cavity (mold) were 10mm × 10mm × 10mm (Total height of the box × Width of the top side of box × Length of the top side of box). The internal diameter of “U” was 5 mm at the base of the box. The mold was used to prepare forty five samples, fifteen samples for each type of composite material. So, three groups were prepared : Group A filled with Filtek ™ Z350 XT composite material, Group B filled with Tetric EvoCeram ® composite material and Group C filled with BRILLIANT ™ NG composite material.Electrical strain gauge (Tokyo Sokki, Japan) was embedded in composite material horizontally at the same level in each sample. Static load of 50 N was applied perpendicular to the center of the occlusal surface of composite restoration in each sample testing. The strain gauge was connected to a Wheatstone bridge with a signal amplifier which measures the strain during load application and gives the amplified signal from (0 to 4.8 volt) to LabJack data acquisition where a stream software give the final values of strain with the aid of a scaled equation of voltage. Then, the von Mises stress (effective stress) was calculated by using equations. Numerical analysis was done by using ANSYS 16.1 - (2015) (finite element tool) software that was used to create the 3 - Dimensional models represented the same materials and dimensions used experimentally. The physical characteristics of the composite models were inserted in the software which included Elastic modulus and Poisson’s ratio (?). Analysis was selected in a finite element method according to boundary conditions. A mesh size and an element size were estimated during the study. The stresses were calculated at static load of 50 N with the ANSYS 16.1 - (2015) software.The data were analyzed statistically by One - way ANOVA test and Least Significant Difference (LSD) test. One - way ANOVA test and LSD test results showed that there was a highly significant difference (P<0.001) presented between groups A and B, groups A and C and between groups B and group C. The Stress induced in BRILLIANT ™ NG composite after load application was the lowest stress value followed by Tetric EvoCeram ® composite and followed by Filtek ™ Z350 XT composite which was the highest stress value experimentally and numerically.

التسرب المايكروي لنوعين من القشرة الخزفية بوجود وعدم وجود الحشوة الراتنجية تحت جهاز التحميل الدوري == Microleakage of Two Porcelain Laminate Veneers Materials With And Without Composite Filling Under Cyclic Loading

Author name: ياسر علي النقيب
Supervisor name: عمار عطا الله علي السعدي
General topic: Dentistry
Specific topic: Dental Treatment
Degree: Master
Language: English
University location: Baghdad
First pages:
Abstract: Although investigators have evaluated the microleakage of porcelain laminate veneers, there is insufficient data regarding the durability of porcelain laminate veneers bonded to existing composite fillings. The aim of this study was to evaluate the microleakage of porcelain veneers restorations fabricated from two types of CAD/CAM ceramic blocks bonded to teeth with or without composite class V composite filling.Forty eight sound, crack - free human maxillary first premolar extracted for orthodontic reasons were selected for this study. Teeth were divided randomly into.2 main groups, which further divded into 2 groups (12 sample each). Group A1 : IPS e.max CAD veneers with standardized class V composite filling, Group A2 : IPS e.max CAD veneers, Group B1 : VITA Suprinity veneers with standardized class V composite filling, Group B2 VITA Suprinity veneers. The class V cavities was restored with nanofilled composite (Filtek™ Z350 XT, 3M ESPE). Standard veneer preparations were made using Ceramic veneer burs system (Keramikveneers. de, Komet). All the veneers were milled by CAD/CAM technology (CEREC MC XL, inLab SW 15, Sirona Dental Systems) Composite fillings (groups A1 and B1) were sandblasted with alumina oxide.Porcelain veneers were cemented in place using light - cured resin cement (Rely Veneer Cement, 3M ESPE), Then the specimens were stored at 37? in distilled water for 2 weeks. Then mechanical load cycling (50,000 load cycle of 49 N at 2.5 Hz) and thermocycling procedure (500 cycles of 5 - 55 Co with 20 sec dwell time) were done. The specimens’ crowns were immersed in 2% methylene blue dye for two days, then mounted in clear acrylic before sectioning with a 0.35 mm microtome. Microleakage percentage were recorded using stereomicroscope and ImageJ program. Results were checked for normality of distribution (Kolmogorov - Smirnov test and Shapiro - Wilk test), and were analyzed with twoway ANOVA and independent samples t - tests. Two way ANOVA shows the significant effect of type of ceramic restoration and the highly significant effect of composite filling, however, the interaction between the main factors was non - significant. The results showed that the lowest mean of microleakage percentage was recorded for group A2 (4.6058% ± 1.5091) which considered statistically significant compared to group B2 (6.105%±1.456), and statistically highly significant compared to group A1 (6.6075%±1.3259) while group B1 recorded the highest mean of microleakage percentage (7.3158%±1.38713). In conclusion, the type of ceramic restoration and the presence of class V filling both had significant effects on microleakage of porcelain veneers. IPS e.max CAD veneers had significantly lower microleakage percentages compared to VITA Suprinity veneers. The presence of class V composite filling within the cervical finishing line of porcelain veneers had a highly significant higher microleakage percentage compared to groups without composite filling.

احتمالية حدوث العيوب في عاج الجذر نتيجة لاستخدام انظمة مختلفة من مبارد النيكل تيتانيوم == The Incidence of dentinal root defects caused by different Nickel Titanium instruments

Author name: نور الدين علي سعيد
Supervisor name: ايمان محمد الزقة
General topic: Dentistry
Specific topic: Dental Treatment
Degree: Master
Language: English
University location: Baghdad
First pages:
Abstract: يعد الاعداد الميكانيكي الاحيائي لقنوات الجذر احد الخطوات الرئيسية لتحقيق حشوة جذر ناجحة بسبب امكانية ازالة الاجسام البكتيرية والحطام المتراكم وتسهيل وضع حشوة الجذر داخل القنوات. الغرض من هذه الدراسة هو لملاحظة ومقارنة احتمالية حدوث العيوب في عاج الجذر نتي | Vertical root fracture and crack formation can be seen in root dentin during and after endodontic procedures. Vertical root fracture is one of the most frustrating complications of root canal treatment, which often results in tooth extraction. The aim of this in vitro study was to compare the effect of different Nickel Titanium instruments (ProTaper Universal, EndoSequence, ProTaper Next and RECIPROC) on the dentinal wall in term of dentinal defects.Seventy - five straight palatal roots of freshly extracted human maxillary first molars teeth were used in this study, the palatal roots were sectioned at 11 mm from the apex and wrapped with two layers of aluminum foil, then placed in the center of elastic silicon mold. Fifteen roots were left unprepared to serve as a negative control group, the remaining 60 roots were divided into 4 groups, each group contained 15 roots : • Group I was prepared by rotary ProTaper Universal system.• Group II was prepared by rotary EndoSequence system.• Group III was prepared by rotary ProTaper Next system.• Group IV was prepared by reciprocating RECIPROC system.All canals were prepared to MAF # 40. After each file size of the (rotary files) or after three pecking motion of the (reciprocating files), the file was removed from the canal and the canal was irrigated with 1 ml of 2% of sodium hypochlorite. All files were cleaned periodically to prevent clogging of flutes during instrumentation. The canal remained patent by insertion size 15 K - file.When the instrumentation was completed, the roots were then embedded in a clear acrylic resin blocks and each root was sectioned into three levels : apical, middle and coronal. All samples were examined from coronal direction under Stereomicroscope. The number and the type of dentinal defects were recorded and classified. The collected data was tabulated and subjected to statistical analysis using chi - square test.The EndoSequence group showed the lowest number of dentinal defects followed by ProTaper Next group and then ProTaper Universal group. The highest number of dentinal defects were observed in RECIPROC group. Chi - square test showed that there were highly significant differences among groups (P < 0.01). The results showed a non - significant difference between EndoSequence and Protaper Next group (p > 0.05), and a significant difference with ProTaper Universal group (P < 0.05) and a highly significant difference with RECIPROC group (P < 0.01). The ProTaper Next group showed a significant difference with ProTaper Universal group and a highly significant difference with RECIPROC groups. There was no significant difference between RECIPROC and ProTaper Universal groups.

انسلاخ المبيضات اللعابي المقاس بواسطة تفاعل البوليميراز المتسلسل الكمي اللحظي كاداة تنبؤ لحصول التهاب المبيضات الفموي عند مرضى الربو المتعاطين لدواء بيكلوميتازون المستنشق == Salivary Candidal Shed Measured By Real Time Quantitative Polymerase Chain Reaction As A Predictor of Oral Candidiasis In Asthmatic Patients On Inhaled Beclomethasone Dp Therapy

Author name: نغم قطران رحيم
Supervisor name: رعد محي الدين حلمي
General topic: Dentistry
Degree: Master
Language: English
University location: Baghdad
First pages:
Abstract: الربو القصبي المزمن يمثل مشكله صحيه جديه في كل العالم وهو عادة يبدا في عمر الطفوله ويبقى المريض في كثير من الاحيان يتعاطى العلاجات المستنشقه مدى الحياة.انتشار الربو القصبي يزداد في كثير من دول العالم مما يجعله احد الامراض المعيقه والمهدده للحياة باعتبا | Asthma is a serious global health problem that usually starts in childhood and continues along patient’s life and most of them have to take inhaled therapy lifelong. The prevalence of asthma is rising in many countries of the world, making asthma one of the most disabling and life threatening diseases effecting patients with different age groups and social classes with variable clinical spectrums and outcomes starting from mild to severe disabling syndrome rendering nonproductive individuals to severe life threatening and sometimes fatal disease. Those patients continue inhaled steroid therapy for long duration, considered by GINA as first line treatment , however such a treatment is associated with local adverse effects on oral tissues, and one of the main concerns is the development of oral candidiasis, a chronic, potentially invasive, infection of oral tissues with fungus candida species resulting in failure of treatment. The scientific interests about such a serious complication have been raised over the past years and debates continued as the candida is considered one of the normal flora of the oral cavity in most of healthy population, however oral candidiasis in pathogenic forms still occur in immunocompromised patients including asthmatics on inhaled corticosteroid therapy.Aim of the study1. To investigate the effect of inhaled corticosteroid therapy in form of Beclomethasone Dipropionate250 microgram/dose CFC free in asthmatic patients on salivary candidal shed estimating by Real Time quantitative Polymerase Chain Reaction (RT qPCR) applied on direct unstimulated saliva samples.2. Evaluation of this shed as prediction of occurrence of oral candidiasis. Patients, Materials and MethodsThis study was conducted at Al Zahraa consultational Asthma and Allergy center - Baghdad Al Karkh Health Directorate from September 2013 to February 2014.The included patients were divided into 3 groups. Group A included asthmatic patients on inhaled Beclomethasone therapy, group B included asthmatic patients that never used any form of inhaled steroid therapy and group C was those asthmatic patients on inhaled Beclomethasone therapy who developed oral candidiasis. All patients were receiving two daily doses. The same exclusion forma was applied to choose Group D who were control healthy individuals. Each included patients and control cases were instructed to give saliva samples in the standard way and samples taken for estimation of candidal count by real time quantitative Polymerase Chain Reaction.Results During the study period, 698 patients were examined, however only 63 patients were included in the study. Those 63 were classified as follows : 28 patients were found on group, 28 were found on group B and only 7 patients were found on group C and 20 cases were selected in group D as a control.Group C patients were having the highest salivary candidal shed (mean=58.7x106 cn/ml) and longest duration of asthma (Mean=2718 days) and longest duration of Beclomethasone therapy (Mean=2224 days) and this was significantly higher than other groups (p<0.05).Group A patients were having the second highest rank after group C in regard of salivary candidal shed and both duration of asthma and Beclomethasone therapy. Inside each group, duration of asthma and duration of Beclomethasone therapy were associated with moderate positive correlation with salivary candidal shed (R>0.5).Age difference between groups were insignificant and age factor had no correlation with salivary candidal shed inside the groups.Discussion : Salivary candidal shed over the groups was directly related to the duration of inhaled Beclomethasone therapy and duration of asthma. They are significantly higher (p<0.01) as we go further from each group to the next, both appear as the reason behind increased candidal shed in groups A and C.The salivary candidal shed curve will gave us a very useful tool for follow up those patients on inhaled steroid therapy ,In addition , predict the risk of developing oral candidiasis and when to interfere prior to the establishment of Oral Candidiasis state as that we have noticed in the group C, in which it was recommended to stop inhaled steroid therapy and the patients would lose the benefits of the therapy.Conclusions1. Resting saliva samples with realtime quantitative PCR was a rapid and accurate tool in diagnosis of oral candidiasis.2. Salivary Candidal Shed could be used as a tool in predicting oral candidiasis in asthmatic patients on inhaled Beclomethasone therapy.3.Longer duration of asthma and longer duration of Beclomethasone therapy were associated with increased salivary candidal shed and established oral candidiasis have the highest amount of shed.4. Candida albicans are present in the oral cavity of any individual of our population

تقيم التسريب الجزني لمركبات الراتنج للحشوات الخلفية سونك فل مركب مستند على السيلورين ومركب نانوفل مستند على الميتاكرليت في : دراسة مقارنة == Microleakage Evaluation of Sonicfill

Author name: مهند احمد الحداد
Supervisor name: حكمت عبد الرحيم الغراوي
General topic: Dentistry
Degree: Master
Language: English
University location: Baghdad
First pages:
Abstract: Resin composites have improved greatly since their introduction and are now the materials of choice for most of the restorations. This study was conducted with aim of comparing in vitro the marginal adaptation of three different, low shrink, direct posterior composites Sonic fill™ (nanohybrid composite), Filtek™ P90 (Silorane - based composite) and Filtek™ Z350 (nanofill composite) of a standardized Class V cavity after thermoal cycling. Sixty sound, freshly extracted human premolars were prepared with standardized Class V cavities. The specimens were divided into three groups of twenty teeth each according to the material used : Group A : The teeth were restored with Sonic fill™ posterior composite unidose capsules, Group B : The teeth were restored with a silorane - based posterior composite (FiltekTM P90), Group C : The teeth were restored with nanofill methacrylate - based composite (Filtek™ Z350 XT).After specimens were stored in distilled water at 37°C for 7 days, all specimens were subjected to thermocycling at (5° to 55 °C), then immersed in 2% methylene blue dye for 24 hours. For each group microleakage at the occlusal and gingival regions was estimated by determining dye penetration using scoring system under steromicroscope (10X). The statistical analysis of the results showed that, Filtek™ P90 silorane based composite exhibited the lowest mean of microleakage, with statistically highly significant difference (P < 0.01) when compared with Sonicfill™ composite and Filtek™ Z350 XT nanofill composite. On the other hand, the results of this study showed that Sonic fill™ composite exhibited no significant difference (P > 0.05) as compared with Filtek™ Z350 XT nanofill composite. Also, the results in this study showed that there is a highly significant difference (P < 0.01) in dye penetration between occlusal and gingival regions for each group
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