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Article
THE ANALYTICAL STUDY OF THE POROUS SILICON ELECTRICALCONDUCTIVITY

Author: Adawiya J. Haider
Journal: Al-Nahrain Journal of Science مجلة النهرين للعلوم ISSN: (print)26635453,(online)26635461 Year: 2009 Volume: 12 Issue: 3 Pages: 45-50
Publisher: Al-Nahrain University جامعة النهرين

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Abstract

Abstract
In this approach we review the electrical conductivity of porous silicon (PS) within this frame
work, we study the variation of (PS) conductivity as a function to the limiting parameters such as
porosity and temperature. We interpret such conductivity and mobility depended on the properties
of the PS layer and the quantum confinements effect in (PS).


Article
Effects of Deposition Parameters on Chemically Deposited PbS Thin Films

Authors: A.M. Mousa --- S.B. Ali
Journal: Iraqi Journal of Applied Physics المجلة العراقية للفيزياء التطبيقية ISSN: 18132065 23091673 Year: 2008 Volume: 4 Issue: 4 Pages: 7-11
Publisher: iraqi society for alternative and renewable energy sources and techniques الجمعية العراقية لمصادر وتقنيات الطاقة البديلة والمستجدة

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Abstract

Lead sulfide thin films were deposited by chemical bath deposition onto glass substrates. Depending on the percentage of the constituent bath salts and bath temperature, films with polycrystalline or amorphous structure were obtained. The influence of bath temperature and bath percentage on optical transmittance in the NIR region and structure was investigated. It was found that thickness goes on decreasing as the concentration of lead acetate increases. XRD revealed that the film deposited at 20°C displays no obvious characteristic reflection peaks which could be detected. Large grains are obtained when both deposition time and temperature are increased.


Article
The Geometrical Analysis Accuracy for Parallel Robotic Mechanisms

Author: Hassan M. Alwan
Journal: Engineering and Technology Journal مجلة الهندسة والتكنولوجيا ISSN: 16816900 24120758 Year: 2011 Volume: 29 Issue: 15 Pages: 3118-3129
Publisher: University of Technology الجامعة التكنولوجية

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Abstract

The geometrical analysis of the robotic mechanisms means the formulation of the position equation of the mechanism in terms of dependent and independent coordinates. This function should describe the position of its links and the end effecter (or moving platform center) in terms of dependent and independent coordinates.In this paper will be derived a mathematical model, that is, a model in terms ofdependent and independent generalized coordinates, for the position accuracy of the end effecter (platform) of the closed kinematics robotic mechanisms. In these types of mechanisms it is necessary to solve the inverse problem of the geometrical analysis. Thesolving of the inverse problem in the robotic systems means the definition of independent coordinates on preset values and evaluation of the dependent coordinates with several degrees of mobility.The aim of this paper is to obtain a new mathematical formulation for evaluation of the deviation of the end effecter position due to the deviation of the independent coordinates. It will be evaluated only the deformations of the arms caused by the weights and the forces.


Article
Mechanisms to promote dialogue between cultures
آليات تعزيز الحوار بين الثقافات

Author: A . P. Dr. Sana Kazem Kata أ.د.م سنـاء كاظم كاطع
Journal: The islamic college university journal مجلة كلية الاسلامية الجامعة ISSN: 62081997 Year: 2014 Volume: 2 Issue: 28 Pages: 61-76
Publisher: College Islamic University / Najaf كلية الاسلامية الجامعة / النجف الاشرف

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Abstract

Although the progress and development of informational and communicational has reinforced Western cultural project, which form a clear real challenge Arab-Islamic culture and its people, as well as the direct impact on the Islamic civilizational project, but the possibility of cross-fertilization of dialogue between different cultures is important imposes the issue of self-presence in front of any cancellation of the other side, which is trying to consolidate the foundations of non-recognition or fusion in the crucible of a single world culture.

على الرغم من أن التقدم والتطور المعلوماتي والاتصالي قد عزز المشروع الثقافي الغربي الذي شكل تحديا حقيقيا واضحا للثقافة العربية الإسلامية وشعوبها، فضلا عن تأثيره المباشر على المشروع الحضاري الإسلامي، إلاّ أن أمكانية الحوار والتلاقح بين الثقافات المختلفة أمرا مهما يفرض قضية وجود الذات أمام أي إلغاء من جانب الآخر الذي يحاول ترسيخ أسس عدم الاعتراف أو الانصهار في بوتقة الثقافة العالمية الواحدة.


Article
Obstacles cultural and civilizational dialogue and mechanisms
معوقات الحوار الثقافي والحضاري وآلياته

Authors: DR.Adel Yasser دزعادل ياسر --- DR.Fatin Mohammed Razak د. فاتن محمد رزاق
Journal: The islamic college university journal مجلة كلية الاسلامية الجامعة ISSN: 62081997 Year: 2014 Volume: 2 Issue: 28 Pages: 459-499
Publisher: College Islamic University / Najaf كلية الاسلامية الجامعة / النجف الاشرف

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Abstract

The variation in cosmic known by humans and is not a cause of discord and conflict and strife, but may be a factor founding of coexistence, cooperation and mutual understanding and tolerance, away from all kinds of national, cultural discrimination, and religious, sectarian

يعد الأختلاف سنة كونية عرف عليها البشر وهو ليس سببا للشقاق والنزاع والأحتراب بل قد يكون عاملا مؤسسا للتعايش والتعاون والتعارف والتسامح بعيدا عن كل أنواع التمييز القومي، الثقافي، والديني، الطائفي


Article
Effect of Friction Forces in Robotic Mechanism Joints on the Dynamic Analysis
تاثير قوى الاحتكاك في مفاصل منظومة الروبوت على الحسابات الديناميكية

Author: Hassan M. Alwan حسن علوان
Journal: Al-Qadisiyah Journal for Engineering Sciences مجلة القادسية للعلوم الهندسية ISSN: 19984456 Year: 2014 Volume: 7 Issue: 4 Pages: 331-342
Publisher: Al-Qadisiyah University جامعة القادسية

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Abstract

Dynamic analysis of parallel robotic mechanisms plays a vital role in the design and control of such robotic mechanisms. To simplify the dynamic analysis formulation, many researches had been done assuming the robotic mechanism joints as ideal joints (without friction). This paper represents a novel mathematical model for evaluation of friction forces, torques acting in the spherical, prismatic joints of parallel robotic mechanism and their effect on the dynamic formulation of any parallel robotic mechanism. The aim of this paper is to obtain a new mathematical formulation for evaluation of the dynamic analysis in non – ideal robotic mechanism. The results show that the friction forces and torques acting on the robotic mechanism joints have actual effects on the actuators to implement the same tasks. The actuators forces shall be increased about ten percentages than the power of the actuators in case of ideal robotic joints

ان الحسابات الديناميكية لاي منظومة روبوت متوازي تلعب دورا كبيرا في تصميم الروبوت وحسابات منظومة السيطرة لهكذا نوع من الروبوتات. لغرض تبسيط معادلات الحسابات الديناميكية لهذه الروبوتات تم انجاز مجموعة من الابحاث مع الاخذ بالافتراض هو ان مفاصل هذه الروبوتات ذات طبيعة مثالية (بدون قوى احتكاك). هذا البحث يستعرض طريقة رياضية جديدة لحساب قوى الاحتكاك وعزوم الاحتكاك التي تؤثر في مفاصل الروبوت الكروية والمستقيمة وحساب تاثير هذه القوى والعزوم على الحسابات الديناميكية للروبوت بصورة عامة. بينت النتائج بان لقوى الاحتكاك تاثير فعلي على المحركات لتنفيذ نفس المهمات للروبوت . ان القوى التي يسلطها المحركات يجب ان تزداد حوالي عشرة بالمائة عنها في حالة استخدام مفاصل مثالية للروبوت. ان هدف هذا البحث هو لايجاد معادلة رياضية للحسابات الديناميكية للروبوت ذو المفاصل غير المثالية (ذات الاحتكاك).


Article
Upgrading of Al-Rustamiyah Sewage Treatment Plant Through Experimental and Theoretical Analysis of Membrane Fouling

Author: Raheek I. Ibrahim
Journal: Iraqi Journal of Chemical and Petroleum Engineering المجلة العراقية للهندسة الكيمياوية وهندسة النفط ISSN: 19974884/E26180707 Year: 2017 Volume: 18 Issue: 2 Pages: 95-107
Publisher: Baghdad University جامعة بغداد

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Abstract

Al-Rustamiyah plant is the oldest and biggest sewage treatment plant in Iraq; it locates in the south of Baghdad city. The plant suffers from serious problems associated with overflow and low capacity. The present work aims to upgrade the heart of biological treatment process through suggesting the use of membrane bioreactor; (MBR). In this work, fouling of membrane during sewage treatment has been analyzed experimentally and theoretically by fouling mechanisms. Aeration has been applied in order to control fouling through producing effective diameters of air bubbles close to the membrane walls. Effect of air flow rate on flux decline was investigated. Hermia's models were used to investigate the fouling mechanisms. The results showed that cake formation is the best fitted model (R2≥0.98) followed by intermediate blocking occurred with 9 L/min aeration rate. Cake layer formation is the best fit mechanism in all aeration rates (1-9 L/min) in presence of microalgae. SEM images of the membrane surface before and after filtration showed high density pores membrane surface proved a cake fouling occurring. It was found that aeration represents the most effective technique for fouling domination in addition to its important economic aspects for algae growth and propagation. An enhancement of 70.8% in flux at 9 L/min air flow has been revealed. MBR proved to be more efficient and more convenient than activated sludge since it eliminates the needing of sedimentation tanks and upgrading Al-Rustamiyah plant that has low available space for expansion.


Article
Means of reading the Qur’anic text at Mr. Mohammed Mohammed Sadiq AL-Sadder (His secret sanctified) in his book "The Gift of God in defending the Qur’an"
آليات قراءة النص القرآني عند السيد محمد محمد صادق الصدر (قدس) في كتاب منّة المنان في الدفاع عن القرآن (دراسة نصية)

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Abstract

The research displays one of the most contemporary methods in reading the Qur’anic text to His Eminence، the religious authority، Mr. Martyr Mohammed M. S. AL-Sadder (His secret being sanctified) in his tagged book "The Gift of God in defending the Qur’an". The research consists of an introduction and three investigations and a display of the most important results. Then it set the margins، sources and references. The research touches upon three Qur’anic mechanisms in dealing with heavenly text، three of them are philosophical in the first investigation which depended on patterns never been used by the best ex- commentators، like the question as a form and the question as a dialogue with the other. And the doubt and to never give up.While the second investigation in which we talked about the textual mechanisms which depended in turn upon methods، which the text and its entries were its main subject، such as the age of the text and causes of descent and its role in understanding the text and its entry and the Qur’anic reading and its role in highlighting the Qur’anic text content through providing them with the opinions of the scientists and explainers. Whereas the third investigation came to highlight the probability theory or (the thesis) in which Mr. AL-Sadder presented one or two possibilities supporting then with scientific clues taken from the soul of the heavenly text. The research outlined a range of important results.

يعرض البحث إحدى أهم الطرق المعاصرة في قراءة النص القرآني لسماحة المرجع الديني السيد الشهيد محمد محمد صادق الصدر (قدس) في كتابه الموسوم بـ(منّة المنان في الدفاع عن القرآن)، تكون البحث من مقدمة وثلاث مقاربات وعرض لأهم النتائج ثم ثبت الهوامش والمصادر والمراجع، تطرق البحث إلى ثلاث مقاربات في التعامل مع النص الإلهي، منها مقاربات فلسفية، في المبحث الأول إعتمدت أساليب ربّما لم تعتمدها جلّ كتب المشكل القرآني السابقة، كالسؤال بوصفه اشكالاً، والسؤال بوصفه حواراً مع الآخر، والشك وعدم التسليم، أمّا المقاربة الثانية والتي حملت عنوان المقاربة النصية، فقد عرض السيد الصدر فيها الى مدخلات النص مادتها الرئيسة مثل السياق ودوره في فهم النص ومدخلاته، والقراءات القرآنية ودورها في إبراز محتوى النص القرآني, من خلال رفدها بآراء العلماء المفسرين، في حين جاء المبحث الثالث ليعرض إلى نظرية الاحتمال أو(الأطروحة) وعصر النص، إذ يقدّم السيد الصدر احتمال او احتمالين في قراءة النص القرآني داعماً إياها بقرائن علمية مستقاة من روح النص الإلهي، إضافة الى عصر النص ودوره في تحديد مدخلات النص وتحديد محتواه، وقد خلص البحث إلى جملة من النتائج المهمة.


Article
Techniques of The demonstration in works of Salam Omar
تقنيات الإظهار في أعمال سلام عمر

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Abstract

This study is concerned with the study of the techniques of demonstration in works of Salam Omar. It is located in four chapters. The first chapter deals of the research problem, its importance and the need for it, the purpose of the research and its limits, and the definition of the most important terms in it The problem of research is determined by trying to answer the following question: What are the techniques of demonstrating in Works of Salam Omar? The first chapter also includes the objective of the research Detection of the techniques of showing in the work (Salam Omar) The second chapter deals Three research, The first research deals The concept of technology and its impact on art, and deals the second research In technical and mechanisms of demonstration them On the photographic surface in schools of modernity and postmodernism, and research The third It has been addressed Techniques of The demonstration in In the works of Iraqi painters, and ended the chapter to The second is the theoretical framework indicators and previous studies, Where it included the most important of the theoretical framework of indicators and concepts. The Chapter three deals with research procedures: Including the research community Choose an adult sample (5) artwork, then search the sample analysis tool.

يعنُي هذا البحث بدراسة (تقنيات الإظهار في أعمال سلام عمر)، وهو يقع في أربعة فصول، خصص الفصل الأول لبيان مشكلة البحث، وأهميته والحاجة إليه، وهدف البحث وحدوده، وتحديد أهم المصطلحات الواردة فيه. فتحددت مشكلة البحث بالسؤال الآتي: ما تقنيات الإظهار في أعمال سلام عمر؟الذي يعنىعن تقنيات الإظهار في أعمال (سلام عمر). وتناول الفصل الثاني ثلاث مباحث، عُني المبحث الأول بمفهوم التقنية وأثرها على الفن، فيما عُني المبحث الثاني في التقنية وآليات إظهارها على السطح التصويري في مدارس الحداثة وما بعد الحداثة، أما المبحث الثالث فقد تناول تقنيات الإظهار في أعمال الرسامين العراقيين، وانتهى الفصل الثاني بمؤشرات الإطار النظري والدراسات السابقة. والفصل الثالث فقد اختص بإجراءات البحث: ومنها مجتمع البحث واختيار عينته البالغة (5) أعمال فنية، ثم أداة البحث فتحليل العينة.أما الفصل الرابع فقد تضمن النتائج والاستنتاجات والتوصيات والمقترحات.


Article
Methods of Secure Routing Protocol in Wireless Sensor Networks

Authors: Waleed Kh. Alzubaidi --- Shaimaa H. Shaker
Journal: Journal of Al-Qadisiyah for Computer Science and Mathematics مجلة القادسية لعلوم الحاسوب والرياضيات ISSN: 20740204 / 25213504 Year: 2018 Volume: 10 Issue: 3 Pages: Comp Page 38-55
Publisher: Al-Qadisiyah University جامعة القادسية

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Abstract

The Wireless Sensor networks (WSN) consider an emerging technology that have been greatly employed in critical situations like battlefields and commercial applications such as traffic surveillance, building habitat, smart homes and monitoring and many more scenarios. Security is one of the main challenges that face wireless sensor networks nowadays. While an unattended environment makes the deployment of sensor nodes in the networks more vulnerable to vary of potential attacks, the limitations of inherent power and memory for the sensor nodes makes conventional solutions of the security is unfeasible. The sensing technology combined with processing power and wireless communication makes it profitable for being exploited in great quantity in future. The wireless communication technology also acquires various types of security threats. This paper discusses a wide variety of attacks in WSN and their classification mechanisms and different securities available to handle them including the challenges faced.

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