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Article
The Effect of a Mediator on Scaffolding EFL Student-Teachers’ Teaching Competencies, Self- Efficacy and Self –Awareness
أثر الوسيط على السقالات للكفاءات التدريسية لمعلمي طلاب السنة الرابعة، الكفاءة الذاتية والوعي الذاتي

Authors: Shatha Alsaadi شذى السعدي --- Shaima Mahdi شيماء مهدي
Journal: Journal of College of Education for Women مجلة كلية التربية للبنات ISSN: Print ISSN 16808738 /E ISSN: 2663547X Year: 2013 Volume: 24 Issue: 4 Pages: 1272-1295
Publisher: Baghdad University جامعة بغداد

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Abstract

This study aims to find out the effect of the mediator on scaffolding fourth yearstudent- teachers' teaching competencies and their self-efficacy. The present study combines scaffolding and self-efficacy by using a mediator on scaffolding students affects teaching competencies and self- efficacy and from the results of which the existence of student-teachers’ self- awareness was ensured as an effect of the same independent variable. The model affects their teaching competencies and led them to be aware of the needs of their pupils and themselves

تهدف الدراسة الى أيجاد أثر الوسيط على السقالات والكفاءة الذاتية وبربطهما أتضح أنهما يؤثران على طلاب السنة الرابعة وعلى الكفاءات التدريسية والكفاءة الذاتية النتائج التي تم ضمان وجود الوعي الذاتي بين الطالب والمعلمين كأثر من المتغير المستقل نفسه


Article
Speed Control of Separately Excited D.C. Motor using Self-Tuned Parameters of PID Controller
السيطرة على محرك تيار مستمر ذو الاثارة المنفصلة عن طريق التوليف الذاتي لمتغيرات المسيطر التناسبي-التكاملي-التناظري

Author: Dr. Abdul-Kareem Z. Mansoor Dr. Thair A. Salih,
Journal: Tikrit Journal of Engineering Sciences مجلة تكريت للعلوم الهندسية ISSN: 1813162X 23127589 Year: 2013 Volume: 20 Issue: 1 Pages: 1-9
Publisher: Tikrit University جامعة تكريت

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Abstract

This paper presents a simulation and hardware implementation of a closed loop control of a separately excited D.C. motor using a self-tuning PID controller. The PID controller design is based on using the Field Programmable Analog Array (FPAA) technology. Parameters tuning of the PID controller is achieved by using the genetic algorithm (GA). The FPAA controller based technology gives the advantage of low power, no quantization noise, high bandwidth and high speed response. The practical results show that a self-tuning controller can outperform a hand-tuned solution and demonstrate adaptability to plant drift; also it gives very acceptable results in the reduction of overshoot, stability time and the steady-state transient response of the controlled plant

يعرض هذا البحث تحليلا وتطبيقا عمليا للسيطرة المغلقة على محرك تيار مستمر ذو الاثارة المنفصلة بأستخدام مسيطر تناسبي-تكاملي-تفاضلي (PID) ذو التوليف الذاتي. ان تصميم المسيطر (PID) مبني على مبدا استخدام تقنية بوابة المصفوفات التناظرية المبرمجة حقليا (FPAA). وان عملية توليف قيم الثوابت للمسيطر (PID) يمكن تحقيقها باستخدام الخوارزمية الجينية (GA). ان التقنيات المبنية على استخدام المسيطرات التناظرية (FPAA) لها ميزات من حيث قلة استهلاكها للطاقة, قليلة الضوضاء, سعة عرض الحزمة, سرعة استجابة عالية. تبين النتائج العملية بان التوليف الذاتي يمكن ان يحل مسالة التوليف اليدوي ويبين قابليته العالية لاحتواء اي انجراف او انحراف لمنظومة العمل عن عملها الصحيح, وكذلك يعطي نتائج مقبولة جدا من حيث القفزة, زمن الاستقرار, استجابة الحالة العابرة لمنظومة السيطرة.

Keywords

PID controller --- FPAA --- Self-tuning --- GA


Article
Evaluation of frictional forces generated by different brackets and orthodontic wires

Authors: Khulood A. Almakhzomi خلود المخزومي --- Nidhal H. Ghaib نضال حسين غايب
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2013 Volume: 25 Issue: special issue 1 Pages: 126-131
Publisher: Baghdad University جامعة بغداد

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Abstract

Background: Sliding mechanics is widely used during orthodontic treatment. One of the disadvantages of thismechanics is the friction generated at the bracket/archwire interface, which may reduce the amount of desiredorthodontic movement obtained. The aim of the present in vitro study was to evaluate and compare the staticfrictional forces produced by two passive self-ligating brackets stainless-steel and hybrid and two conventionalbrackets stainless-steel and monocrystal ligated with stainless-steel ligature wire at two degrees of torque(zero andtwenty) under dry condition.Materials and method: One hundred and sixty brackets were used in this study divided into four groups each groupconsisted of forty brackets these are: Two self-ligating (stainless-steel and Hybrid) while the two conventional typesare the (stainless-steel and monocrystal).twenty of each group examined with 0.016"x0.022"archwire, ten at 0˚ torqueand ten at 20˚ torque while the other twenty of each group examined with 0.019"x0.025", ten at 0˚ torque and ten at20˚ torque.Results: There was a significant different between all groups except in case when self-ligating brackets (both types)ligated to both wires at 0˚torque there was no significant difference.Conclusions: The self- ligating brackets produce significantly lower static friction than the conventional types at bothdegrees of torque. There was no significant different between both self-ligating brackets at0˚torque while at 20˚torque the stainless- steel self –ligating produce lower static friction than the clear self-ligating type

Keywords

static --- friction --- self-ligating --- conventional --- torque


Article
AN ACTIVE SELF-TUNING SUSPENION SYSTEM TO IMPROVE DRIVER COMFORT
نظام تعليق ذو تضبيط ذاتي فعال لتحسين راحة السائق

Author: Dr. Salim Y. Kasim
Journal: Al-Qadisiyah Journal for Engineering Sciences مجلة القادسية للعلوم الهندسية ISSN: 19984456 Year: 2013 Volume: 6 Issue: 3 Pages: 308-314
Publisher: Al-Qadisiyah University جامعة القادسية

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Abstract

This paper presents the simulation of two dimension a half-vehicle self –tuning active suspensionsystem to simultaneously improve vehicle ride comfort. A validated 4-DOF of vehicle linear modelwas used to study the performance of passive suspension system and compared with the developedactive suspension system. The governing equations of motion for the self- tuning active suspensionwas derived and used to reduce the effect of disturbances to the dynamics performance of thevehicle, which appear when the vehicle excited by a semi-circular sinusoidal bump road of a (0.1m) height. The performance of passive suspension and the self-tuning active suspension aredemonstrated by simulations and specially the vertical acceleration and the vertical root meansquare (RMS) acceleration to observe the effect of the proposed system to the ride comfort. Theactive suspension system introduced in this work show good results for improving the ride comfort

في هذا البحث نموذج محاكاةَ لموديل ثنائي البعد خطي ذو اربع درجات من الحرية لنِصْف مركبةِ تحتوي على نظامِ تعليقِ فعالذو تَضْبيط ذاتيِ لتَحسين ا رحةِ ال ا ركب بشكل آني. استند البحث على نموذج خطي كَانَ يُس تَعملُ لدِ ا رسَة أداءِ نظامِ التعليقِ السلبيِللمقارنة بنظامِ التعليقِ النشيطِ المطورِ. تم اشتقاق المعادلات الحَاكِمة للحركةِ لنظام التعليقَ النشيطَ واستخدمت بتقليل تأثيرالاضط ا ربات على أداءِ ديناميكا المركبة، الذي يَظْهرُ عندما تثار العربةَ بصدمة طريق على شكل نصف دائري لموجية جيبيهبارتفاع 0.1 متر. إنّ أداءَ التعليقِ السلبيِ وتعليقِ التَضْبيط الذاتيِ النشيطِ تم عرضه بالمحاكاةِ وخصوصاً التعجيلِ العموديِ ومعدل مربع الجذر للتعجيل لمُلاحَظَة تأثيرِ النظامِ المُقتَرَحِ على ا رحةِ ال ا ركب . وقد وجد انه هناك نتائج تظه ا رن نظام التعليقِالنشيطِ المقدم في هذا البحثِ قد اعطى نتائج جيدة لتَحسين ا رحةِ ال ا ركب.


Article
The relationship between emotional intelligence and learning process ( Analytical exploratory study of a sample of the Iraqi private colleges)
العلاقة بين الذكاء العاطفي و عملية التعليم دراسة أستطلاعية تحليلية لعينة من الكليات الاهلية العراقية

Author: Saad M.Hussain سعد مهدي حسين
Journal: Journal Of AL-Turath University College مجلة كلية التراث الجامعة ISSN: 20745621 Year: 2013 Issue: 13 Pages: 40-77
Publisher: Heritage College كلية التراث الجامعة

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Abstract

ABSTRACT When we deal with term of intelligence we mean the speed of wit, and when say passion we mean emotions and it destructive powers and when merge both teams we will get the emotional intelligence term which consist capabilities and skills which can be measured and what companied with these capabilities are the emotions assessment, organizing and expressing about them In a way to support the emotional growing for human across his perception and how to manage them and how motive and sympathy his relationships with others. What we have discussing above is important abilities in preparing scientific and excellent student , thus the specialists see conserving the field of management and human development that critical line between human with high performance and human low performance or between success and failure is not by having intelligence but by having other things called the emotional intelligence which unable human of understanding his feeling and emotions as well as the feeling and emotions of other to more capabilities when dealing with his surrounding environment which means that he owns the emotional health which basic and signification for education and succeeding the student that it will make him able of having self confidence and and love of acquaintance and self understanding and knowing what his motive the necessary that should use to sympathize with others.This concept pushes the reascher to employ this subject for Iraqi student education .the researcher summed up a conclusion of this study as follow: 1-Self awareness and its manage ,motivation,empathy social skills are important and capabilities to create excellent scientific students. 2-Conclusion also refer to the shortage in this capabilities affect and reduce the scientific level student. The researcher recommendation as follow: 1-The council of university or college must create scientific approach to study emotional intelligence for lecturers and student as a method to integrate with the rapidly changes of the Iraqi environment to deal with the effects this changing in behavior, how he think in order make decisions. 2-Using dimensions of this intelligence in the study the relationships of lecturers with their students.

المستخلصعندما نتناول مصطلح الذكاء فأننا نعني سرعة الفطن وعندما نقول الوجدان فأننا نعني العاطفة وقواها القاهرة وعندما نجمع هذين المصطلحين يتكون لدينا مصطلح الذكاء العاطفي الذي يتكون من قدرات ومهارات يمكن قياسها او الوصول اليها وما يصاحب هذه القدرات من ادراك الانفعالات وتقييمها وتنظيمها والتعبير عنها وبما يعزز النمو العاطفي لدى الانسان عبر الوعي بذاته وأدارتها ، ودافعيته وتعاطفه في علاقاته مع الآخرين ، أن الحد الفاصل بين الانسان ذو الاداء العالي و ذو الاداء الواطيء ليس بما يمتلكونه من ذكاء عقلي بل شيء آخر يطلق عليه الذكاء العاطفي الذي يمكنه من تفهم مشاعره وأنفعالاته وكذلك مشاعر وأنفعالات الآخربن ليكون أكثر قدرة على التعامل مع البيئة المحيطة به أي بمعنى أمتلاكه للصحة العاطفية والتي هي أساسية وهامة للتعليم ولنجاح الطالب والتي ستمكنه من أمتلاك الثقة بالنفس وحب الاستطلاع وفهم الذات ومعرفة ماهي دوافعه وماهي الآليات الواجب أستخدامها لتعاطفه مع من حوله. أن هذا هو ماحدى بالباحث الى تناول هذا الموضوع وتوظيفه في عملية التعليم للطالب العراقي ،لقد توصل الباحث في بحثه الى أستنتاجات مفادها أن مكونات الذكاء العاطفي لها علاقة بمكونات عملية التعليم وهي قدرات هامه في أعداد الطلبة المتفوقين علمياً والنقص فيها يؤدى الى حدوث خلل في المستوى العلمي لهم ، كما وجد الباحث ومن خلال متابعته للمواد الدراسية التي تدرس للطلبة الى عدم وجود مواد دراسية تتناول هذا الموضوع رغم أهميته مع عدم وجود برامج تدريبية للطلبة او الاساتذة في هذا التخصص يمكن توظيفها لأغراض النجاح المستقبلي وتخريج موارد بشرية ذات أداء علمي متميز، وتبعا لذلك يوصي الباحث ضرورة الاهتمام بالذكاء العاطفي وتدريسه بأعتباره وسيلة من وسائل توافق الطالب مع المتغييرات البيئة التي تحيط به أنطلاقا من أن مشاعر الفرد وأنفعالاته من أهم المؤثرات في توجيه سلوكه وطريقة تفكيره وأتخاذه القرارات


Article
A study to compare the efficiency of different instrumentation systems for cleaning oval-shaped root canals (An in vitro study)

Authors: Tay H. Kadhom طي كاظم --- Walid N. Al-Hashimi وليد الهاشمي
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2013 Volume: 25 Issue: 1 Pages: 49-55
Publisher: Baghdad University جامعة بغداد

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Abstract

Background: Proper cleaning and shaping of the whole root canal space have been recognized as a realchallenge, particularly in oval-shaped canals.This in vitro study was conducted to evaluate and compare theefficiency of different instrumentation systems in removing of dentin debris at three thirds of oval-shaped root canalsand to compare the percentage of remaining dentin debris among the three thirds for each instrumentation system.Materials and methods: Fifty freshly extracted human mandibular molars with single straight oval-shaped distal rootcanals were randomly divided into five groups of ten teeth each. Group One: instrumentation with ProTaperUniversal hand instruments, Group Two: instrumentation with ProTaper Universal rotary instruments, Group Three:instrumentation with Revo-Srotary instruments, Group Four: instrumentation withTwisted rotary files and Group Five:instrumentation with Self-Adjusting Files (SAF). Sodium hypochlorite (3%) was used as an irrigant for all groups. Aftercanals preparation, the roots were split longitudinally and photographed with a professional digital camera. Theimages of root sections were then magnified to 100x and the percentage of remaining dentin debris calculated forthe apical, middle and coronal thirds by dividing the pixels occupied by debris at each third by the total pixelsrepresenting the entire area of the canal using Adobe Photoshop CS6. Data were analyzed statistically by ANOVAand LSD at 1% and 5% significant levels.Results: Both ProTaper hand and ProTaper rotary files resulted in significantly cleaner canals than Revo-S and Twistedrotary files at the middle and coronal thirds. The Self-Adjusting Files produced significantly cleaner canals at thethree thirds than all the other groups. The coronal and middle thirds showed a greater amount of remaining dentindebris than the apical third for all groups except a non-significant difference found between the apical and middlethirds in SAF group.Conclusion: The Self-Adjusting Files allowed more efficient cleaning of oval-shaped root canals than hand androtary instruments


Article
Effect of External Sulfate Attack on Self Compacted Concrete
تأثير مهاجمة الاملاح الخارجية على الخرسانة ذاتية الرص

Author: Zena K. Abbas Al-Anbori
Journal: Engineering and Technology Journal مجلة الهندسة والتكنولوجيا ISSN: 16816900 24120758 Year: 2013 Volume: 31 Issue: 6 Part (A) Engineering Pages: 1092-1106
Publisher: University of Technology الجامعة التكنولوجية

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Abstract

Self-compacting concrete (SCC) is an innovative concrete that does not require vibration for placing and compaction. It is able to flow under its own weight, completely filling formwork and achieving full compaction, even in the presence of congested reinforcement. The effect of external sulfate attack was studied-Es (very sever exposure SO4>10000ppm) according to ACI 318-11. The mix design method of SCC used is according to EFNARC 2002, and then must satisfy the criteria of filling ability, passing ability and segregation resistance. The experimental program focuses to study two different chemical composition of sulfate resistance Portland cement with different percentage of silica fume replacement by weight of cement and W/cm (0.3 and 0.35). The SCC mixes with cement type 1(C3S= 46.39 and C3S/C2S = 1.78) shows more resistance to Es than mixes with cement type 2 (C3S= 61.22 and C3S/C2S =4.44). The SCC mixes containing 10% SF as replacement of cement shows more resistance to external sulfate attack. The percentage of increase is 17.95% for SCC mixes with type 1 cement and W/cm =0.3 and 17.88% for SCC mixes with type 2 cement and W/cm =0.3 compared to reference concrete mixes

الخرسانة ذاتية الرص هي خرسانة غير تقليدية لا تحتاج الى عملية أهتزاز أو رص في التنفيذ. تكون لها القابلية على الانسياب تحت تأثير وزنها, ولها القابلية على ملئ القالب كاملاً حتى في وجود تسليح كثيف . تم دراسة تأثير مهاجمة الاملاح الخارجية القاسية (SO4 > 1000ppm) وحسب متطلبات الجمعية الامريكية 318 لعام 2011 . الخلطات الخرسانية مصممة حسب متطلبات EFNARC لعام 2002 والتي يجب ان تتوافق مع قابليتها على الملئ , الانسياب و مقاومتها للانعزال. البرنامج العملي يركز على دراسة تأثير التركيب الكيماوي للسمنت البورتلاندي المقاوم ,أضافة نسب من ابخرة السيلكا كأستبدال من وزن السمنت و بنسب وزن ماء الى سمنت 0,3 و 0,35.الخلطات الخرسانية ذاتية الرص الحاوية على النوع 1 من السمنت (46,39=C3S و C3S/C2S=1,78) أظهرت مقاومة أعلى لمهاجمة الاملاح الخارجية من الخلطات الحاوية على النوع 2 (61,22=C3S و C3S/C2S=4,44).الخطات الخرسانية ذاتية الرص الحاوية على 10% من أبخرة السيليكا كانت أكثر مقاومة لمهاجمة الاملاح الخارجية و كانت نسبة الزيادة قد وصلت الى 17,95 للنوع 1 من السمنت و 17,88 للنوع 2 من السمنت لنسبة ماء الى سمنت (0,3).


Article
Some Fixed Point Theorems for Generalized Contractive SelfMapping on Cone Metric Space
بعض هبرهناث النقطت الصاهدة لتطبيق ذاتي هنكوش هعون في فضاء كوى الوتري

Author: Tamara Shehab Ahmed تمارة شهاب احمد
Journal: Journal of College of Education مجلة كلية التربية ISSN: 18120380 Year: 2013 Issue: 3 Pages: 69-78
Publisher: Al-Mustansyriah University الجامعة المستنصرية

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Abstract

In this paper, we prove some fixed point theorems for self mapping satisfying generalized contractive condition in the setting of Cone metric space with assumption that the Cone is non-normal. Our results aregeneralizations of some recent results


Article
the phenomenon of self-alienation and the impact poets Alagherbh
اغتراب الذات في شعر الأغربة

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Abstract

AbstractThe research aims to the statement of the phenomenon of self-alienation and the impact poets Alagherbh the grounds that alienation is the most severe types of self-alienation and how this community has dealt with this kind of alienation? What are the pictures and manifestation of this alienation as a phenomenon of humanity suffered owners disorders in their personalities through their sense that they are an anomaly; also have tried to research that shows the causes of alienation and self-motivation and what are the effects left by the same who falls under the influence and what are the ways in which he used Alagherbh to overcome this phenomenon; also tried to research that shows you that the impact of alienation negative or positive and what is its impact on the expatriate person.

يهدف البحث إلى بيان ظاهرة الاغتراب الذاتي و أثره لدى الشعراء الأغربة باعتبار أن الاغتراب الذاتي هو أقسى أنواع الاغتراب، وكيف تعاملت هذه الطائفة مع هذا النوع من الاغتراب؟ وما هي صور ومظاهر هذا الاغتراب باعتباره ظاهرة إنسانية عانى منها أصحابها اضطرابات في شخصياتهم من خلال إحساسهم بأنهم جماعة منبوذة كذلك فقد حاول البحث أن يبين أسباب الاغتراب الذاتي ودوافعه وما هي الآثار التي يخلفها في نفس من يقع تحت تأثيره وما هي الطرق التي سلكها الأغربة للتغلب على هذه الظاهرة؛ وكذلك حاول البحث أن يبين الأثر الذي يتركه الاغتراب سواء كان الأثر سلبي أم ايجابي وما هي انعكاساته على الشخص المغترب.


Article
The Effects of 2 Types of Cements and 2 Types of Surface Treatments on Shear Bond Strength of Zirconia

Author: Maha A Al-Murad
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2013 Volume: 13 Issue: 3 Pages: 473-481
Publisher: Mosul University جامعة الموصل

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Abstract

The aim of this study is to evaluate the interactive influence of different types of cement and surface treatments on bond strength of zirconia. Materials and Methods: Thirty cylindrical zirconia blocks (Diameter4mm& thickness4mm)were fabricated for the study. All the specimens were ground with 600 grit silicone carbide polishing paper. Zirconia specimens were randomly divided into three main groups. 1stcontrol (600grit) no surface treatment. 2ed the specimens were air-abrasion with 50um aluminum oxide particles (Al2O3). 3 rd the specimens were air-abrasion with 50um aluminum oxide particles (Al2O3)+ silane .Then ,each group was divided into two groups according to the luting cement used which are( Reinforcd glass ionomer cement and dual cure resin cement).The zirconia blocks bonded to the composite blocks using these types of cements. Then each pair of zirconia block and composite was applied to load of( 15 Kg) for 15 minutes in order to standardized the applied pressure for each type of cement . The resin cement was then light polymerized for 30s with LED light at 500mW/cm2 (Ledition, Ivoclar Vivadent, Liechtenstien) at the distance of 1mm from each direction. The specimens were stored for 24 hours at 37℃. Shear bond strength was measured by using Universal Testing Machine, and mode of failure examined by a stereomicroscope. Results: All the zirconia blocks were bonded to the composite blocks by self adhesive resin cement revealed results more preferable than zirconia blocks were bonded to the composite blocks by Reinforced glass ionomer cement. The shear bond strength between Zirconia and self-adhesive resin cement for the surface were treated with Aluminum-oxide air abraded alone, and zirconia surface were treated with Aluminum-oxide air abraded + silane more preferable than shear bond strength cement between Zirconia and Rinforeced glass ionomer cement for the surface were treated with Aluminum-oxide air abraded alone, and zirconia surface were treated with Aluminum-oxide air abraded + silane. Conclusion: Zirconia was more durable with Self-adhesive resin cement than Reinforced glass ionomer cement. Zirconia Surface treatments were very critical for improvement bond strength with cement in addition to the properties of that cement

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