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Article
historical viewon Ibn AL-Saa`i era
توطئة تاريخية عن عصر ابن الساعي

Author: Dr. Diar Mohammed Sharif Al-Sindi د.ديار محمد شريف السندي
Journal: journal of arabian sciences heritage مجلة التراث العلمي العربي ISSN: 22215808 Year: 2015 Volume: 1 Issue: 1 Pages: 237-292
Publisher: Baghdad University جامعة بغداد

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Abstract

historical viewon Ibn AL-Saa`i era Dr. Diar Mohammed Sharif Al-SindiInstitution of Arab history(Abstract)This paper deals with the political, economic and cultural condition wich in volves a lot of events that angaged Arab is history Islamic, The advantage of the Ibn AL-saa`i is in fact a study of the character of the historian and how classihy us his book History of the Caliphs in the eventes of this era.

توطئة تاريخية عن عصر ابن الساعي د.ديار محمد شريف السندي معهد التاريخ العربي(خلاصة البحث)يتناول هذا البحث الحالة السياسيّة والاقتصاديّة والثقافية لعصر ابن الساعي والذي حفل بالكثير من الأحداث التي شغلت التاريخ العربي الإسلامي ، إنّ الاستفادة من عصر ابن الساعي هو في واقع الحال يشكل دراسة لشخصية هذا المؤرخ وكيف صنف لنا كتابه تاريخ الخلفاء في ظل إحداث هذا العصر


Article
Salivary Physicochemical Characteristics in Relation to Oral Health Status Among Institutionalized Autistic Adolescents in Baghdad/Iraq

Authors: Ali Hadi F. Al-Fatlawi --- Nada Jafer MH. Radhi
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2017 Volume: 29 Issue: 3 Pages: 68-74
Publisher: Baghdad University جامعة بغداد

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Abstract

Background: Autism spectrum disorder (ASD) is characterized by impairments in social interaction and communication, restricted patterns of behavior, and unusual sensory sensitivities. Saliva may provide an easily accessible sample for analysis. Some salivary constituents levels altered in adolescents with ASD including antioxidants . This study aimed to investigate salivary physicochemical characteristic in relation to oral health status among adolescents with ASD.Materials and methods: Two groups were included in this study: 40 institutionalized autistic adolescents and 40 apparently healthy school adolescents control group with age range (12-15 years old, only males) selected randomly from Baghdad. Each group subdivided into two groups according to the severity of dental caries: caries free group (20 child, DMFT=0) and high caries group (20 child, DMFT≥6). Decayed, missing and filled surfaces (DMFS), plaque (PlI), Gingival (GI) and calculus (CI) indices were used to measure oral health status for both groups. Copper (Cu), zinc (Zn) and thiocyanate (SCN) in saliva measured by atomic absorption spectrophotometer. Salivary alpha amylase (sAA) and glutathione (GSH) assessed by enzyme-linked immunosorbent assay (ELISA). Salivary pH and flow rate were measured directly. The data of current study was analyzed using SPSS version 21.Results: A higher value of salivary pH, flow rate, sAA, SCN, Cu and Zn were found among study group than control group with significant difference, also higher in caries free subgroup than high caries subgroup. While GSH was significantly higher in control group than study group. Moderate negative correlations between sAA, Cu, Zn and PlI, CI, GI with highly significant and salivary pH correlate moderately with PlI and CI with highly significant.Conclusion: There was alteration in salivary constituents levels which related to oral health status in adolescents with ASD and can act as adjunctive diagnostic aid for diagnosing autism.

Keywords

Autism spectrum disorder --- sAA --- SCN --- GSH


Article
Modeling and Optimization of Machine Parameters Using Simulated Annealing Algorithm (SAA)

Authors: Aqeel Sabree Bedan --- Alaa Hassan Shabeeb --- Hassan Nemaha Al-Sobyhawe
Journal: Engineering and Technology Journal مجلة الهندسة والتكنولوجيا ISSN: 16816900 24120758 Year: 2016 Volume: 34 Issue: 7 Part (A) Engineering Pages: 1473-1482
Publisher: University of Technology الجامعة التكنولوجية

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Abstract

The present work deals with the mathematical modeling and analysis of machining response such as the surface roughness in the milling of aluminum alloy (AA6061). There are several machiningvariableslikerotational speed, depth of cut and feed rate used to find the quality of surface quality. Simulated Annealing Algorithm (SAA) is utilized to develop an effective mathematical model to predict optimum level. In simulated annealing algorithm (SAA), an exponential cooling program depending on Newtonian cooling is applied and experimentation is done on choosing the number of iterations for each step. The SAA is used to predict the cutting variables (rotational speed,feed rate and depth of cut) on productquality in dry millingof Al 6061 based on Taguchi‘s orthogonal array of L9 and analysis of variance (ANOVA) were apply to determination the important factors that effect on surface quality.At last, tests were conducted to confirm by making a comparison between the experimental results and the model developed. The experimental results have shown the performance ofmachining in the milling can be improved effectively using this algorithm.


Article
Optimization and Prediction of Process Parameters in SPIF that Affecting on Surface Quality Using Simulated Annealing Algorithm
الامثلية والتنبوء لمتغيرات عملية التشكيل النقطي التي تؤثر على جودة السطح الناتج باستخدام خوارزمية محاكاة التلدين

Author: Aqeel Sabree Baden عقيل صبري بدن
Journal: Al-Khwarizmi Engineering Journal مجلة الخوارزمي الهندسية ISSN: 18181171 23120789 Year: 2016 Volume: 12 Issue: 4 Pages: 81-92
Publisher: Baghdad University جامعة بغداد

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Abstract

Incremental sheet metal forming is a modern technique of sheet metal forming in which a uniform sheet is locally deformed during the progressive action of a forming tool. The tool movement is governed by a CNC milling machine. The tool locally deforms by this way the sheet with pure deformation stretching. In SPIF process, the research is concentrate on the development of predict models for estimate the product quality. Using simulated annealing algorithm (SAA), Surface quality in SPIF has been modeled. In the development of this predictive model, spindle speed, feed rate and step depth have been considered as model parameters. Maximum peak height (Rz) and Arithmetic mean surface roughness (Ra) are used as response parameter to assess the surface roughness of incremental forming parts along and across tool path direction. The data required has been generate, compare and evaluate to the proposed models that obtained from SPIF experiments.Simulated Annealing Algorithm (SAA) is utilized to develop an effective mathematical model to predict optimum level. In simulated algorithm (SA), an exponential cooling schedule depending on Newtonian cooling process is used and by choosing the number of iterations at each step on the experimental work is done. The SA algorithm is used to predict the forming parameters (speed, feed and step size) on surface quality in forming process of Al 1050 based on Taguchi‘s orthogonal array of L9 and (ANOVA) analysis of variance were used to find the best factors that effect on the surface quality.

تعد عملية التشكيل التزايدي من التقنيات الحديثة في تشكيل الصفائح المعدنية التي تتم عن طريق سلسلة من الحركات الدورانية التي تؤديها عدة التشكيل في نقطة تشكيل واحدة وبشكل متسلسل. وتتم حركة هذه العدة من قبل ماكنة التشغيل المبرمج. بهذه العملية الأداة تشكل الصفائح بصورة آنية من خلال عملية السحب النقي. هذا البحث يقوم بالتركيز على تطوير نموذج لتنبوء جودة السطح الناتج من عملية التشكيل النقطي. تتم عملية التطوير الحاصلة لنموذج التنبوء باستخدام متغيرات العملية (سرعة دوران, معدل التغذية وعمق النزول) التي اخذت بنظر الاعتبار في عملية بناء النموذج. تم اخذ قيم متوسط الخشونة والخشونة العظمى استجابة لمتغيرات العملية وباتجاه مسار العدة وبصورة عامودية على مسار العدة. حيث ان مجموع هذه البيانات تم توليدها, ومقارنتها وتقويمها بين النموذج المقترح والقيم الناتجة من الجانب العملي لعملية التشكيل النقطي.تم استخدام خوارزمية التلدين لتطوير النموذج الرياضي الفعال للتنبؤ بالمستوى الأمثل للعملية. في هذه المحاكاة، يتم عمل جدول التخفيض الأسي على أساس عملية تخفيض نيوتن ويتم اجراء التجارب الاختيارية على عدد من التكرارات في كل خطوة. نفذت خوارزمية التلدين على متغيرات عملية التشكيل النقطي (السرعة, التغذية وعمق النزول ) وتاثيرها على دقة السطح الناتج في عملية تشكيل صفائح الالمنيوم (1050) على أساس متعامدات تاكوشي وبمستوى (L9) وتحليل التباين (ANOVA) للتعرف على أهمية هذه العوامل و تاثيرها على جودة السطح.

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