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دراسة عملية لانتقال الحرارة بالحمل الحر لصفيحة مستطيلة الشكل مسخنة بثبوت درجة الحرارة

تم اجراء عدد من التجارب المختبرية لاجل ايجاد علاقة بين رقم نسلت ورقم رالي وكذلك لدراسة تأثير زاوية الميل
ومستوى التسخين في معدل انتقال الحرارة بالحمل الحر من صفائح مستطيلة ذات ثقب مستطيل مسخنة (mA) تثقيب المساحة
106 ). نتائج الدراسة ≤Ra≤3.96× بثبوت درجة الحرارة وبوجود أسطح امتداد، وضمن منطقة الجريان الطباقي لرقم رالي ( 106
(mA) يقل فيما يزداد انحدار درجات الحرارة عند زيادة رقم كراشوف ونسبة التثقيب (δ) بينت إن سمك الطبقة المتاخمة الحرارية
(Φ=90º) وكذلك عند زيادة زاوية الميل وصولا للوضع العامودي.وان اكبر قيمة لمتوسط رقم نسلت سجلت عند الوضع العمودي
( mA) وتزداد أيضا قيمة رقم نسلت المتوسط بزيادة نسبة التثقيب .(Φ=180º) واقل مقدارعندما يكون وجه الصفيحة الى الاسفل
ورقم كراشوف.
وحصل توافق جيد عند مقارنة النتائج العملية للبحث الحالي مع نتائج عملية وعددية لبحوث سابقة.

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Publication Date
Wed Feb 12 2014
Journal Name
مجلة كلية التربية/ الجامعة المستنصرية
Publication Date
Tue Mar 24 2009
Journal Name
المؤتمر العلمي الثالث لكلية العلوم جامعة بغداد(24-26)اذار
Publication Date
Wed Nov 20 2024
Journal Name
Economics And Administrative Studies Journal (easj) (formerly Al-dananeer Journal)
تاثير مبادئ حلقة القرار OODA)) في خفة الحركة الاستراتيجية – دراسة ميدانية في عدد من مستشفيات مدينة بغداد

The research aims to diagnose the level of relationship and effect of the decision cycle (OODA) principles on strategic agility, aware of the importance of the subject itself as one of the modern themes which were writings around it somewhat limited, as well as pursuing to study it in a field which the nature of its activities requires the a necessary link between the decision cycle principles and strategic agility, the health institutions was the best, (Medical city, Al Yarmouk) both hospitals were selected as a society for research, and doctors working in emergency departments was as a sample, included (26) doctor from the first hospital, and (27) doctor from the Second, total sample was (53) doctor, by applying a number of descriptive st

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Publication Date
Sun Sep 01 2019
Journal Name
Journal Of Legal Sciences
Procedures of the parliamentary question Under the constitution of the republic of Iraq For 2005: دراسة مقارنة

من خلال دراستنا للسؤال البرلماني تبين لنا ان السؤال البرلماني يمثل اداة رقابية مهمة يتمكن النواب عن طريقها من متابعة نشاط الحكومة اضافة الى كونه قناة للتعاون بين السلطتين التنفيذية والتشريعية.

ان تنوع صور السؤال البرلماني وسهولة اجراءات طرحه وبساطتها والحيوية التي تمنحه فعالية الاداء ساهمت كثيرا في تصاعد استعماله كأداة رقابية برلمانية كما ان التطور المضطرد في الوسائل الاعلامية المرئية والمسموعة وال

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Publication Date
Mon Sep 01 2008
Journal Name
Journal Of Economics And Administrative Sciences
دور تطبيق نموذج Senge في التَعَلّم التنظيمي لتحقيق الإبداع في منظمات الأعمال "مدخل إلى دراسة تفكير النظم"

The purpose of this research is to suggest a model which may be used by law enforcement to broaden individual and organizational creativity while providing a more inclusive, holistic view of management within our internal and external organizational structures. This project introduces alternatives to traditional management, leadership styles and problem solving strategies. Law enforcement organizations in the 21st century will face many challenges. Much like community policing impacted the nation in the mid 1980's through the 1990's, the systems thinking approach offers a philosophy for the new millennium.

Most organizations will face many challenges in the next decade of the twentieth first century. Just

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Publication Date
Tue Feb 26 2019
Journal Name
Journal Of Accounting And Financial Studies ( Jafs )
Role of the General Dudget in the Achievement of Sustainable Development: دراسة تحليلية مقارنة للموازنة العامة العراقية

The traditional method adopted in the preparation of the general budget in Iraq is not consistent with developments in the size specification response and spending and the associated weakness in the size of the amounts earmarked for investment projects which could adversely affect future generations and not to enable them to continue the development, which requires talking to estimate the adoption of style public expenditure in the state budget and reduce waste and extravagant where and invest public revenues of the state in investment projects and preservation of the environment and natural resources in order to ensure the benefit of future generations system, according to the system serves to achieve the overwhelming majority of member

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Publication Date
Wed Dec 01 2010
Journal Name
Journal Of Economics And Administrative Sciences
التنبؤ بالأحتياجات من أدوية الأمراض المزمنة والمحافظة على المال العام* دراسة تطبيقية في دائرة العيادات الطبية الشعبية

Abstract                                                                                

The health section is considered to be one of the most important section in the  field of service economical and social unit because of its concern in the life of human begin and society and the  process of determining t

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Publication Date
Mon Sep 01 2008
Journal Name
Journal Of Economics And Administrative Sciences
التغير والاستقرار في سلوك الاسهم العادية خلال الفواصل الزمنية "دراسة تطبيقية لعينة من المصارف في بورصة عمان"

Knowing the conduct of the common stocks during the different intervals of time (quarterly and yearly) is an important step in choosing and administrating the portfolio of common stocks which be in accordance with the tendency of the investor toward risk and revenues. This is an attempt to understand the behavior of this common stocks in Amman stock Exchange to discover the extent of change in its behavior for employing them by the managers in identifying the accurate and beneficed investments , which meet the ambitions of Arab investor.    

 

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Publication Date
Tue Sep 01 2009
Journal Name
Journal Of Economics And Administrative Sciences
دور الموازنة المرنة على أساس النشاط في الرقابة على التكاليف (دراسة تطبيقية في الشركة العامة للصناعات الجلدية)

The research aims to identify the level of increase or decrease the product cost through the activity based flexible budgeting that gives us the chance to follows the cost since the product is planed to be made till it appears in the market and it also helps to fined out any problems that are expected to happen in the future and to put the costs under control, also to know much the surveying affects the perfect use for the complete resources in order to be used in the demanded way, the research is divided in to three sides ,the first is specialized for the theoretical side, the second is for the partical side, while the third side is specialized for the conclusions and recommendations.        &nbsp

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Publication Date
Wed Sep 01 2010
Journal Name
Journal Of Economics And Administrative Sciences
اثر التعلم المنظمي في التمكين الإداري دراسة استطلاعية لآراء عينة في الشركة العامة للصناعات الكهربائية في بغداد

This research aims at studying a contemporary and modern phenomenon in the Science of management in general and in the field of organizational behavior in private, The organizational learning and managerial empowerment in a governmental organization :"The General Company of Electric Industries" .The dimensions of organizational learning have been defined (Learning Dynamics، organization transformation, individuals empowerment, knowledge management and Technology application) as wells as the dimensions of managerial empowerment (possessing the information and its availability– Independency and the freedom of conduct and knowledge possession) Information has been gathered by a questionnaire distributed on a sample of professiona

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