Preferred Language
Articles
/
alkej-311
Experimental Study Using the Passive Solar Chimney for Evaporative Cooling With PCM and CFM as a Thermal Energy Storage
...Show More Authors

 

      In this work, a test room was built in Baghdad city, with (2*1.5*1.5) m3  in dimensions, while the solar chimneys (SC) were designed with aspect ratio (ar) bigger than 12. Test room was supplied by many solar collectors; vertical single side of air pass with ar equals 25, and tilted 45o double side of air passes with ar equals 50 for each pass, both collectors consist of flat thermal energy storage box collector (TESB) that covered by transparent clear acrylic sheet, third type of collector is array of evacuated tubular collectors with thermosyphon in 45o instelled  in the bottom of TESB of vertical SC. The TESB was made from metallic iron sheets as a shell and fuelled by paraffin wax as phase change material (PCM). The PCM supported by copper foam matrix (CFM) to enhance thermal conductivity of wax. When heat is released from TESB to the air, a buoyancy force will be generated in chimney gaps. Then a difference in pressure between inside and outside test room leads to induce the air flow to test room through wet corrugated cellulose pad, where evaporative cooling (EC) occurs. Results of experimental work, that achieved in June, for 12 to24 hour in the test day, refer to effectiveness using EC to decrease the room temperature comparing. The system reduces test room temperature of up to 8.5~9.2 oC in 11:00 am to 3:00 pm and at highest effectiveness of EC, while minimum reduces in temperature of up to 3.5 oC in 8:00pm to 3:00 am. Also, the results showed the affectivity to using the TESB, during the night time for ventilation and EC, with lower effectiveness than from day time. The range of EC effectiveness equals 30.5-37.5 with a natural vent, while The maximum air change per hour (ACH) equals (3.8-6.187), and the maximum mass flow rate is equal to (36.651 kg.hr-1) at experimental evaluation of the system’s discharge coefficient value 0.371.

View Publication Preview PDF
Quick Preview PDF
Publication Date
Sun Jun 30 2019
Journal Name
College Of Islamic Sciences
Itentional deliberative in Surat Al-Zumar M. Sheeda Khader Karim
...Show More Authors

This research deals with deliberative intentionality in its two dimensions, deliberative intent, direct, and indirect deliberative intent, and deliberative intentionality assumed great importance to ancient and contemporary scholars. The text, relying on deliberative intent as a methodology concerned with the study of language in usage, and the research focuses on direct deliberative intent through (the intent of acceptability, the intent of the presumption, the intent of the informational, the intent of interaction), and the indirect deliberative intent through (the intentionality of the case, the intent of the metaphor, The intent of the communicative impulse, the intent of the allusion,), and these deliberative elements activate and c

... Show More
View Publication Preview PDF
Publication Date
Sat Jun 01 2024
Journal Name
مجلة العلوم
الذكاء الاصطناعي والوجود الإنساني: قراءة فكرية في الأبعاد السياسية
...Show More Authors

يُعد الذكاء الاصطناعي من العلوم الحديثة التي ارتبطت بالإنسان منذ العقود الخمسة الماضية، وأصبحت السياسة الرقمية جزءاً لا يتجزأ من المجتمع لكونها تُستعمل في أغلب مجالات حياة الإنسان. وهذا ما شجع صانعي السياسات التكنولوجية الجديدة في التفكير بكيفية توظيفه لخدمة مصالحهم العليا السياسية والاقتصادية، بغض النظر عن بذل الجهود للتفكير في تنظيمهم للذكاء الاصطناعي التوليدي، ووضع قيود تراعي التشريعات الدينية، وقوا

... Show More
View Publication Preview PDF
Publication Date
Thu Jul 29 2021
Journal Name
Arab Science Heritage Journal
اللغة ما بين العامية والفصحى في مجلة لغة العرب
...Show More Authors

The Arabic language is one of the important magazines that issued in our contemporary history not only on the Iraqi level but according Arabic one as well because it considered

View Publication Preview PDF
Crossref
Publication Date
Sat Jun 01 2013
Journal Name
Journal Of Economics And Administrative Sciences
Internal control – Internal check
...Show More Authors

Abstract

All the economic  units whether productive or service units , strive to achieve specific objectives , their presence and continuity depend on them and the quality of the performance and service present to the society . This units to be able to achieve their objectives , must own basic assets to perform the activities , and apply laws , systems , and instructions , in addition to legal , managerial , and financial authorities . So this units to endeavor maintain this assets , in addition to sound application of laws ,systems . and procedures to enhance their performance . For this purpose arise the role of internal control and internal check in maintenance of assets and sound application of&n

... Show More
View Publication Preview PDF
Crossref
Publication Date
Sat Feb 01 2014
Journal Name
Journal Of Economics And Administrative Sciences
Philosophical Framework To Intellectual Capital Readiness in Iraqi Organizations
...Show More Authors

           This research aim to present theoretical and philosophical framework regards topic of intellectual capital readiness in Iraqi universities. That is, by using strategic map in balanced score card of Norton and Kaplan (2004). This research discusses theoretical content for three main aspects reflect in its nature elements of intellectual capital readiness in organizations. This includes human capital readiness, information capital readiness and organizational capital readiness. To clear each element, the authors relay on mechanism to determine gape per element of intellectual capital elements.

View Publication Preview PDF
Crossref
Publication Date
Sat Jan 01 2005
Journal Name
Journal Of The College Of Languages (jcl)
تحليل الأخطاء الصوتية في بعض كتب اللغة الروسية الدراسية
...Show More Authors

تحليل الأخطاء الصوتية في بعض كتب اللغة الروسية الدراسية

View Publication Preview PDF
Publication Date
Wed May 18 2016
Journal Name
Al-academy
Music Jawq military in Iraq: زينب صبحي عبد البياتي
...Show More Authors

Was and military music still in Iraq whatever tributary of Music, where contributed Brphi Iraqi music musicians, authors and composers of musicians skilled and qualified teachers, was, and still have a big role in the growth and prosperity and progress of contemporary Iraqi music through active and vital role and make a lot of musical tenders excellence in various military and civilian walks of life whether it be in the days of war or peace.As it is the military music schools and the main source of the most important in the education of these machines and training. Therefore occupies the military musicians in Iraq prestigious and important, particularly in the Iraqi National Symphony Orchestra started the forefront of the musical instrum

... Show More
View Publication Preview PDF
Crossref
Publication Date
Sun Jan 02 2005
Journal Name
Political Sciences Journal
عرض اطروحة (الحركات الاسلامية في ظل الوضع الدولي الجديد)
...Show More Authors

الحركات الاسلامية في ظل الوضع الدولي الجديد

View Publication Preview PDF
Crossref
Publication Date
Thu Nov 08 2018
Journal Name
Iraqi National Journal Of Nursing Specialties
المشكالت الصحية المرافقة لالستخدام الخاطئ للحاسوب في مدينة بغداد
...Show More Authors

The Research aimed for identification the significant of health problems that occurrences through
misused of computer for those whom attaches with more than two hours daily and to identification the
nature of demographical characteristics variables and that related variables with using computer. Also to
know the level of user’s knowledge for some attaché’s equipment's and finally creating a new suggested
measurement scale for studying health problems that were occurred through misused of computer.
Creating questionnaire includes several domains (Social problems – family environment, Social problems –
external environment, some health problems attaches with related equipment's, psychological problems,
and hea

... Show More
View Publication Preview PDF
Publication Date
Wed Nov 28 2018
Journal Name
Arab Science Heritage Journal
بابل بابل في العصر الشبيه بالكتابي وعصر فجر السلالات
...Show More Authors

This study deals with the region of the Babylon governorate in Iraq during the Proto-Literate and Early Dynastic periods. It is the region of the well- known ancient capital Babylon. The earlier period includes Late Uruk, Jamdat nasr, and the first epoch of the Early Dynastic period. The latter includes the second and third epochs of the Early Dynastic period. The both periods had lasted more than one thousand years (3500-2334 BC

View Publication Preview PDF