In the present investigation two different types of fiber reinforced polymer composites were prepared by hand lay-up method using three different parameters (curing temperature, pressing load and fiber volume fraction). These composites were prepared from the polyester resin as the matrix material reinforced with glass fibers as first group of samples and mat Kevlar fibers as the second group, both with different volume fractions (4%, 8%, and 12%) of fibers. They were then tested by tensile strength and impact strength. The main objective in this study is to use Taguchi method for predicting the better parameters that give the better tensile and impact strength to the composites, and then preparing composites at these parameters and comparing them with the randomly used once. The experimental and analytical results showed that the Taguchi method was successful in optimizing the parameters that give the highest properties and it can find the most influential parameter regardless of the material used. Also it showed that the volume fraction was the most influential parameter on the tensile and impact strength. The difference between these composites was in the properties values and that the Kevlar composites have higher tensile and impact strength.
خص ابن الجزري في كتابه هذا قراء الكوفة بمجموعه كبيرة من التراجم التي قدمها وفق صياغات منهجية منوعه اعتمدت على الأسس والضوابط التي التزم بها في تقديم تلك التراجم الخاصة بقراء الكوفة بصورة خاصة والتراجم الأخرى بصورة عامه مشيرا إليها من خلال بعض الصياغات الفنية في الروايات، فكان يشير إلى نوع العلاقة لمترجمة مع شيوخه من خلال عرضه للرواية ولاسيما في كثرة الرو
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تضمن البحث دراسة تأثير بعض مركبات قواعد شيف الجديدة على فعالية أنزيم الكولين استريز في مصل دم الإنسان وقد لوحظ بأن المركبات المستعملة تسبب تنشيط فعالية الانزيم وباستعمال تراكيز مختلفة من هذه المركبات ودراسة نوع التثبيط اظهرت النتائج المستحصله من رسم line weaver Burk ان التثبيط يكون غير تنافسي وكانت النسبه المئوية التثبيط بهذه المركبات تتراوح بين (38.44-87.16(%
Costs are considered the main factors in making pricing decisions in practical application for the availability of information related to these costs relatively to other factors in addition to the management direction toward covering costs in the long term , at least for the continuity of production .
Recently, the development occurred in the industry, the appearance of modern technology as a result of projects expansion and the use of automation in production that demands the increase of the activities for the purpose of productions engineering , and the concentration on examining and testing product before it is marketing , and the development of employees skil
... Show MoreA financial analysis tool such as financial rations concentrates on explanation of financial statement and using them in the evaluation of company profiles and fixing taxable profits, by analyzing final calculation, explaining their results and studying relationships between a group of financial lists 'elements in a specific period and the trend of their relationships in percentage from so, financial analysis is considered on important instrument for tax analytical test procedures through studying and evaluating financial data in order to get proper information which is needed to make sure of credibility and reliability of statements submitted by the taxpayer and the satisfaction of the tax analyzer in the credibility of these statements
... Show MoreThis research deals with a jurisprudential manuscript with study and investigation by Sheikh Ibrahim Al-Kurani, one of the prominent Kurdish scholars in the eleventh century. Some claim that it is heresy in the religion, and that the Prophet, may God bless him and grant him peace, did not do it.
The Sheikh responded to that, confirming its permissibility, and that it does not fall within the innovated matters, based on its permissibility on the two Eids and other religious occasions, and also that the issue of supplication with acceptance was legislated for the sake of worship without specifying it to one without the other, and it is known that prayer is one of the greatest acts of worship. supplication that fasting is accepted;
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ﺣﻘﻮق اﻻﻧﺴﺎن ﺣﻘﻮق ﻣﺮﺗﺒﻄﺔ ﺑﺤﺮﯾﺔ وﻛﺮاﻣﺔ اﻻﻧﺴﺎن واﻟﺘﻲ ﺗﻀﻤﻨﮭﺎ اﻟﺴﻠﻄﺎت اﻟﻌﺎﻣﺔ وﺟﺎءت اﻟﻤﻮاﺛﯿﻖ اﻟﺪوﻟﯿﺔ واﻻﻗﻠﯿﻤﯿﺔ واﻟﺪﺳﺎﺗﯿﺮ ﻟﻠﺘﺄﻛﯿﺪ ﻋﻠﻰ اھﻤﯿﺔ ھﺬا اﻟﻤﻮﺿﻮع وﺑﻘﺪر ﺗﻌﻠﻖ اﻟﻤﻮﺿﻮع ﻓﻲ اﻟﻤﺮأة اﻟﻌﺮﺑﯿﺔ ﻋﺎﻣﺔ اﻟﻌﺮاﻗﯿﺔ ﺑﺸﻜﻞ ﺧﺎص، ان ﺣﻘﻮﻗﮭﺎ ﺗﺸﮭﺪ ﺗﻘﺪﻣﺎً ﻣﻠﺤﻮﻇﺎً ﻓﻲ اﻟﺴﻨﻮات اﻻﺧﯿﺮة ﻧﺘﯿﺠﺔ ﺛﻮرات اﻟﻮﻋﻲ اﻟﺤﺎﺻﻠﺔ ﻓﻲ اﻟﻮﻃﻦ اﻟﻌﺮﺑﻲ، اذ ﺷ
... Show Moreفي هذا البحث، تم استكشاف تأثير نوع المكاسب على التفاعلات التعاونية الدولية لاسيما في مجال مواجهة التحديات المناخية. إذ تبين أن المكاسب النسبية تلعب دورا حاسما في توجيه سلوك الدول فيما يتعلق بالاتفاقيات البيئية الدولية. ويعكس هذا التحليل دروسا مهمة لصياغة السياسات والجهود الدولية في هذا المجال ذاته. ان الدول عندما تتوقع مكاسب نسبية تفوق الخسائر المتوقعة من التعاون، فإنها تكون أكثر عرضة للالتزام بالاتفاقيات
... Show MoreThe audit committee has received considerable attention from international institutions and researchers as a result of financial failures and the collapse of major international companies, especially cases of manipulation and misinformation in the financial statements, due to the role played by one of the mechanisms of control of economic entities to increase disclosure and credibility of information published, In overseeing the preparation of financial reports, following up the internal auditing functions, supporting the external auditor and enhancing his independence, and strengthening the shareholders' confidence in the economic entity. The two researchers prepared the applied side of the research by applying a proposed model based on
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