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تصميم وبناء خلية وقود غشاء تبادل البروتون ذات حبيبات البلاديوم النانوية == Design and Construction of Proton Exchange Pd Nanoparticle Membrane Fuel Cell

Author name: مناف صالح مجيد
Supervisor name: محمد كريم ظاهر
General topic: Laser Science
Specific topic: Laser Applications in Physics
Degree: Doctorate
University: University of Baghdad - Laser Institute For Postgraduate Studies
Language: English
University location: Baghdad
First pages:

تاثير هلام التبييض والتحفيز الضوئي لليزري الدايود940 نانومتر و 980 نانومتر على درجة الحرارة داخل لب السن وكفاءة تبييض الاسنان == Effect of Bleaching Gel and (940 nm and 980 nm) Diode Lasers Photoactivation on Intrapulpal Temperature and Teeth Whitening Efficiency

Author name: اسماء عبد شندي الساعدي
Supervisor name: علي شكر محمود
General topic: Laser Science
Specific topic: Laser Applications in Medicine - Dentistry
Degree: Master
University: University of Baghdad - Laser Institute For Postgraduate Studies
Language: English
University location: Baghdad
First pages:

دراسة تشخيصية لتراكيب نانوية لاغشية ثنائي اوكسيد السليكون الرقيقة المحضرة بتقنية السول - جل == Characterization Study of Nanostructured SiO2 Thin Films Prepared By Sol Gel Technique

Author name: حسن علوان خيون
Supervisor name: محمد كريم ظاهر
General topic: Laser Science
Specific topic: Laser Applications in Physics
Degree: Master
University: University of Baghdad - Laser Institute For Postgraduate Studies
Language: English
University location: Baghdad
First pages:

تحسين بعض الخواص السطحية من طلاء الليزر لسبائك الالمنيوم مع حبيبات كربيد السيليكون وكربيد البورون == Enhancement Some of Surface Properties of Laser Cladding of Aluminum Alloys with (SiC and B4C) Particles

Author name: رائد محمد هادي
Supervisor name: Mahmoad Shakir Mahmoad
General topic: Laser Science
Specific topic: Laser Applications in Mechanical Engineering
Degree: Master
University: University of Baghdad - Laser Institute For Postgraduate Studies
Language: English
University location: Baghdad
First pages:

توليد الارقام العشوائية الحقيقة بالاعتماد على زمن وصول الفوتون == True Random Number Generation Based on Photon Arrival Time

Author name: رغد سعيد حسن
Supervisor name: شيلان خسرو توفيق
General topic: Laser Science
Specific topic: Laser Applications in Electronics and Communications Engineering
Degree: Master
University: University of Baghdad - Laser Institute For Postgraduate Studies
Language: English
University location: Baghdad
First pages:

الكشف عن الرطوبة النسبية باستخدام مقياس التداخل لليف البلوري الفوتوني == Relative Humidity Detection Using Photonic Crystal Fiber Interferometer

Author name: سعاد صاحب هندال
Supervisor name: حنان جعفر طاهر
General topic: Laser Science
Specific topic: Laser Applications in Physics
Degree: Master
University: University of Baghdad - Laser Institute For Postgraduate Studies
Language: English
University location: Baghdad
First pages:

نسج السطح باستخدام الليزر للفولاذ الكاربوني المنخفض AISI 1010 و الفولاذ السبائكي AISI 4320 == Laser Surface Texturing of Low Carbon Steel AISI 1010 and Low d Alloy Steel AISI 4320

Author name: احمد عبد الرزاق
Supervisor name: Ziad Aeyad Taha
General topic: Laser Science
Specific topic: Laser Applications in Mechanical Engineering
Degree: Master
University: University of Baghdad - Laser Institute For Postgraduate Studies
Language: English
University location: Baghdad
First pages:

تحسين اداء الترميز السعوي الطيفي بنظام الترميز البصري المتعدد باستخدام محزز الليف البصري نوع براغ == Performance Enhancement of SAE - OCDMA Using Fiber Bragg Grating

Author name: ابراهيم لؤي عبد الجبار
Supervisor name: تحرير صفاء منصور
General topic: Laser Science
Specific topic: Laser Applications in Electronics and Communications Engineering
Degree: Master
University: University of Baghdad - Laser Institute For Postgraduate Studies
Language: English
University location: Baghdad
First pages:

تاثير ليزر الدايود "410 نانومتر" على البكتيريا المقاومة للمضادات الحيوية المعزولة من اخماج الحروق والجروح == The Effect of 410 nm Diode Laser on Antibiotic Resistant Bacteria Isolated from Burn and Wound Infections

Author name: منى غازي محمد
Supervisor name: امل مصطفى مكي`
General topic: Laser Science
Specific topic: Laser Applications in the Life Sciences
Degree: Master
University: University of Baghdad - Laser Institute For Postgraduate Studies
Language: English
University location: Baghdad
First pages:

تقييم الخواص الكهربائية والحرارية لبولي ميثيل ميثاكريلات المكسو بانابيب كاربون نانونية باستخدام ليزر الياك == Evaluation of Electrical and Thermal Properties of PMMA Cladded by CNTs Using Nd : YAG Laser

Author name: ولاء عصام رسول
Supervisor name: Thaier Abid Tawfiq
General topic: Laser Science
Specific topic: Laser Applications in Mechanical Engineering
Degree: Master
University: University of Baghdad - Laser Institute For Postgraduate Studies
Language: English
University location: Baghdad
First pages:

الخواص اللاخطية للموائع النانوية باستخدام تقنية حيود الليزر == Nanofluids Nonlinear Properties Using laser Diffraction Technique

Author name: مناف قاسم خلف
Supervisor name: مازن مانوئيل الياس
General topic: Laser Science
Specific topic: Laser Applications in Physics
Degree: Master
University: University of Baghdad - Laser Institute For Postgraduate Studies
Language: English
University location: Baghdad
First pages:

تحليل مكونات السبائك الثلاثية باستخدام تقنية العد الفوتوني للبلازما المنتجة بالليز == Analysis of Ternary Alloys Constitutes Using Photon Counting Technique for Plasma Induced by Laser

Author name: علي زهير رضا الالوسي
Supervisor name: Mazin M. Elias | Ahmed A . Moosa
General topic: Laser Science
Specific topic: Laser Applications in Production Engineering and Metallurgy
Degree: Master
University: University of Baghdad - Laser Institute For Postgraduate Studies
Language: English
University location: Baghdad
First pages:

دراسة معلمات البلازما المنتجة بواسطة ليزر فلوريد الكربتون خلال برنامج حاسوبي == STUDY OF KrF LASER PRODUCED PLASMA PARAMETERS VIA COMPUTER SIMULATION

Author name: سمير رحيم شهيب
Supervisor name: Al-Janabi | M. M. Elias
General topic: Laser Science
Specific topic: Laser Applications in Nuclear Engineering
Degree: Master
University: University of Baghdad - Laser Institute For Postgraduate Studies
Language: English
University location: Baghdad
First pages:

تقييم الاجهادات المتبقية والخصائص الميكانيكية للمعادن الغير المتشابهه الملحومة بليزر ثاني اوكسيد الكاربون المستمر == Estimation of Residual Stresses and Mechanical Properties of Dissimilar Metals Welded by CW CO2 Laser

Author name: ضياء احمد صلال
Supervisor name: Adel Khaleel Mahmoud
General topic: Laser Science
Specific topic: Laser Applications in Mechanical Engineering
Degree: Doctorate
University: University of Baghdad - Laser Institute For Postgraduate Studies
Language: English
University location: Baghdad
First pages:

تاثير ليزر Q - Switched Nd : YAG على بعض عوامل الفوعه لبكترياPseudomonas aeruginosa بوجود سفرانين O == Effect of Q - Switched Nd : YAG Laser on Some Virulence Factors of Pseudomonas aeruginosa in The Presence of Safranin O

Author name: حنان محمد عباس الجنابي
Supervisor name: امل مصطفى مكي
General topic: Laser Science
Specific topic: Laser Applications in the Life Sciences
Degree: Master
University: University of Baghdad - Laser Institute For Postgraduate Studies
Language: English
University location: Baghdad
First pages:

التاثير القاتل لليزر ثاني اوكسيد الكاربون على اصابه ماحول زرعه السن : دراسه خارج الجسم == Bactericidal Effect of CO2 Laser on Peri - Implant Infection (in Vitro Study

Author name: بيداء فليح حمزة
Supervisor name: علي شكر محمود | اسراء حسن عبدعلي
General topic: Laser Science
Specific topic: Laser Applications in Medicine - Dentistry
Degree: Master
University: University of Baghdad - Laser Institute For Postgraduate Studies
Language: English
University location: Baghdad
First pages:

الاعتبارات التصميمية لتكيف الليزر القرصي الى ماكنة تحكم رقمي مبرمج == Design Considerations for Disc Laser adaptation to CNC Machine

Author name: يوسف حربي عبد الامير الاسدي
Supervisor name: Khalil Ibrahim Hajim
General topic: Laser Science
Specific topic: Laser Applications in Mechanical Engineering
Degree: Master
University: University of Baghdad - Laser Institute For Postgraduate Studies
Language: English
University location: Baghdad
First pages:

دراسة مصدر اشعاع قوس التفريغ الكهربائي المعزز بالليزر من القصدير السائل في المدى الطيفي للاشعة فوق البنفسجية القصوى == INVESTIGATION OF A LASER ASSISTED VACUUM ARC RADIATION SOURCE OF LIQUID TIN IN THE EUV SPECTRAL RANGE

Author name: وسام حسن مهدي العجيلي
Supervisor name: خليل ابراهيم حاجم
General topic: Laser Science
Specific topic: Laser Applications in Physics
Degree: Doctorate
University: University of Baghdad - Laser Institute For Postgraduate Studies
Language: English
University location: Baghdad
First pages:

مرشح ضوئي حزمي المرور متعدد التنغيم باستخدام الالياف البلورية الفوتونية == All - optical tunable bandpass filter using Photonic crystal fiber

Author name: ميثم صبري جابر
Supervisor name: عبد الهادي مطشر الجنابي
General topic: Laser Science
Specific topic: Laser Applications in Electronics and Communications Engineering
Degree: Master
University: University of Baghdad - Laser Institute For Postgraduate Studies
Language: English
University location: Baghdad
First pages:

دراسة اداء جهاز مرشح الليف البصري ذو الحزمة الضيقة باستخدام محززات براك لليف البصري == Study the Performance of Implemented Narrow Band Optical Fiber Filter Using FBGs

Author name: مناف صالح مجيد
General topic: Laser Science
Specific topic: Laser Applications in Physics
Degree: Master
University: University of Baghdad - Laser Institute For Postgraduate Studies
Language: English
University location: Baghdad
First pages:

تاثير ليزر ثنائي اوكسيد الكربون المجزئ على خشونة السطح وارتباط زركونيوم السيراميك مع الاسمنت الراتنج == Effect of Fractional CO2 Laser on the Surface Roughness and Bonding of Zirconium Ceramic to Resin Cement

Author name: لمى ابراهيم محمد علي
Supervisor name: حسين على جواد
General topic: Laser Science
Specific topic: Laser Applications in Medicine - Dentistry
Degree: Master
University: University of Baghdad - Laser Institute For Postgraduate Studies
Language: English
University location: Baghdad
First pages:

توليد الموجه المثالية باستخدام محزز براغ الليفي == Soliton Generation in Fiber BraggGrating

Author name: ليث طارق محمد
Supervisor name: تحرير صفاء منصور
General topic: Laser Science
Specific topic: Laser Applications in Electronics and Communications Engineering
Degree: Master
University: University of Baghdad - Laser Institute For Postgraduate Studies
Language: English
University location: Baghdad
First pages:

تنفيذ البوابة اكس اور بصريا بالكامل لمنظومات الاتصالات البصرية == Implementation of All Optical Exclusive - OR Gate for Optical Communication Systems

Author name: ياسمين سلمان كاظم
General topic: Laser Science
Specific topic: Laser Applications in Electronics and Communications Engineering
Degree: Master
University: University of Baghdad - Laser Institute For Postgraduate Studies
Language: English
University location: Baghdad
First pages:
Abstract: One of the most important techniques used to realize logic gates in optical networks is by all - optical signal processing.The most two important problems of electronic signal processing are high propagation loss of electronic signals and the high cost of the high speed electronics. Accordingly, these reasons led to converting to optical domain at higher frequencies (≥ 10 ????????/????) .The goal of this work is to implement all optical logic gates specifically exclusive - OR gate. Exclusive - OR gate have an important role in data encryption, parity checking, data encoding, bit pattern generation and matching, addressing, header recognition and many more applications. In this work an all - optical exclusive - OR logic function was achieved by a simulation software and implementing an experiment.In the simulation work, the exclusive - OR function was implemental by using a highly nonlinear fiber with a fiber nonlinear coefficient of 9.1 ????−1????????−1 , 0.135 km length non - degenerate with four wave mixing process and a NRZ - DPSK 10 GB/s signals.Experimentally the exclusive - OR function was implemented by using a highly non fiber with a fiber nonlinear coefficient of 10 ????−1????????−1and a 1 km length with bidirectional degenerate four wave mixing process. The optical signals that were used for the operation of the exclusive - OR function were NRZ - DPSK 40 GB/s signals. Results showed an exclusive - OR function associated with clear eye diagrams. In addition to that, exclusive - NOR function was also obtained experimentally in addition of these four maxterms (A + B, ????̅+ B, A + ???? ̅ and ????̅ +???? ̅ ).

تاثير ليزر النودميوم ياك وبيبتيدات الفوسفات الجبنية - فوسفات الكالسيوم الغير متبلرة مع الفلوريد على ازالة تمعدن مينا الاسنان في دراسة مختبرية == The Effect of Nd : YAG Laser and Casein - Phosphor - Peptide - Amorphous Calcium Phosphate with Fluoride on Dental Enamel De - mineralization : In vitro study

Author name: هبة عصام عبد الوهاب
Supervisor name: علي شكر محمود
General topic: Laser Science
Specific topic: Laser Applications in Medicine - Dentistry
Degree: Master
University: University of Baghdad - Laser Institute For Postgraduate Studies
Language: English
University location: Baghdad
First pages:
Abstract: New approaches for caries prevention by using lasers effect combined remineralizing agent providing calcium and phosphate in addition to flouride for increasing the tooth mineral resistance needed. The aim of this study is to evaluate a new treatment modality to decrease dental enamel dissolution via combing the effect of pulsed Nd : YAG laser (1064 nm) and MI plus paste (CPP - ACP containing sodium fluoride ) regarding the tooth pulp chamber temperature elevation, calcium concentration dissolute from enamel surfaces and the dental enamel absorption of methylene blue stain by assessing (R,G,B)values .Eighty human permanent premolar were used in this study, sixty of them were randomly divided into six groups of 10 specimens. The negative control group A received no treatment, and the positive control group B the MI plus paste was applied without laser irradiation. For the groups C, D, E and F the pulsed Nd : YAG (1064 nm) laser was used in two energy settings. The lower laser dose setting at (0.6W, 60 mJ )without and with the MI plus paste for the groups C and D respectively and the higher laser energy setting at (1.7W, 170 mJ )with and without the MI plus paste for the groups E and F respectively.Twenty teeth were used to asses s the temperature elevation during irradiation with laser using a K - type thermocouple at 37 ± 0.5 ̊C, ten teeth exposed to the lower laser energy settings and ten for the higher laser energy settings.A circular window (4 mm radius) marked area on buccal surfaces of the 60 samples after they had been coated with three layer of nail varnish to exposed to the Nd : YAG laser irradiation, and then the samples incubated in 3ml acidic solution of acetate buffer of (0.1M/L) with a pH value of 4.5 for 48 hours . The acidly etched samples removed from the acidic solution after they had been washed from acid they immersed in a 2% solution of methylene blue dye to measure the (R,G,B) values to indicted the affinity of sample surfaces for absorbing methylene blue stain that indicate the surface demineralization . Results of temperature test +showed that the maximum temperature increases for group E (4.7 Co) was very high significant difference (p<0.05) over that of groups C (2.5 Co).The atomic absorption photometry test results showed that groups C, and D were statistically different compared to the groups A and B (p<0.001) in the reduction of calcium dissolution, with a reduction percentage for groups C and D of 25.7% and 33.34% respectively compared to group A, with 21.75% and 29.8 % for groups C and D respectively in comparison to group B. While Groups E and F shown nonsignificant reduction in calcium dissolution compared to control groups.The (R,G,B)s value test showed that groups C and D having lower affinity to absorb methylene blue stain, and they are statically significant different compared to the groups A and B .while groups E and F showing a higher affinity to absorb methylene blue stain compared to control groups. In conclusion the both laser irradiation settings energy (60mJ, 0.6 W,0.12 J/cm2),(170mJ,1.7W,0.34J/cm2) are safe for the vitality of the dental pulp, and when both settings combined with the Phosphor - Peptide - Amorphous Calcium Phosphate with Fluoride ,the results showing significant reduction of dental enamel de - mineralization and lower affinity for methylene blue absorption that although indicate increasing dental enamel resistance to demineralization for the groups of (60mJ, 0.6 W,0.12 J/cm2) laser irradiation settings.

تاثير المعلمات المختلفة لليزر الليف على تعرية الصبغ البوليمري من على سطح سبيكة الالمنيوم نوع 5005A == Effect of Different Fiber Laser Parameters on Stripping of Polymer Paint from Surface of 5005A Aluminum Alloy

Author name: هالة عبود جاسم
General topic: Laser Science
Specific topic: Laser Applications in Mechanical Engineering
Degree: Master
University: University of Baghdad - Laser Institute For Postgraduate Studies
Language: English
University location: Baghdad
First pages:
Abstract: This study provides details of the use of laser as an alternative method to the conventional ones to remove (20) μm thickness of polyester paint from EN AW - 5005A Aluminum alloy, the laser paint stripping process performed by ytterbium fiber laser with a wavelength (1064) nm .Sets of experiments curried out in order to reach to the most suitable parameters for the process, at the first set different levels of energies used from 0.0425 mJ to 1.12 mJ, nine lines of holes accomplished by laser. The holes diameters and the depth at each energy measured in this experiment. At two different pulse repetition rates (20, 50) KHz two sets of experiments done. At the first set the effect of laser energy (0.1565, 0.73, 1.12)mJ also the overlap percent (25%, 50%, 75%) have been studied at five number of passes, the parameters of the process settled by the overlap equations, the effect of the overlap percent on the total time of machining and the material removal rate at different levels of energy also investigated, it’s found that the best energy to work with is 0.1565mJ with one and two passes.The second set of experiments done at 0.1565mJ with a wider range of overlap percent from 25% to 75% increase by five. The removal depth and the behavior of surface roughness determined by Focus Variation Microscopy (FVM) also Scanning Electron Microscope used to analyze the radiated area. It’s found that the best results obtained at 50 % overlap when the laser passes one time on the material.Laser Induced Breakdown Spectrometer (LIBS) used as a method for monitoring and controlling the paint stripping process in order to accomplish the process and ablate only the paint layer without ablating the substrate, for the paint and the substrate (LIBS) spectrum obtained and used to distinguish between the paint layer and the Aluminum substrate.
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