In this work, functionally graded materials were synthesized by centrifugal technique at different
volume fractions 0.5, 1, 1.5, and 2% Vf with a rotation speed of 1200 rpm and a constant rotation time, T
= 6 min . The mechanical properties were characterized to study the graded and non-graded nanocomposites
and the pure epoxy material. The mechanical tests showed that graded and non-graded added alumina
(Al2O3) nanoparticles enhanced the effect more than pure epoxy. The maximum difference in impact strength
occurred at (FGM), which was loaded from the rich side of the nano-alumina where the maximum value was
at 1% Vf by 133.33% of the sample epoxy side. The flexural strength and Young modulus of the functionally
graded samples were enhanced by 43.69% and 52.74%, respectively, if loaded from the alumina-rich side.
On the other hand, when loading (FGM) from the epoxy side, the amount of decrease in bending resistance
was 122.4% while the improvement in bending modulus was 81.11% compared to pure epoxy. Scanning
electron microscopy (SEM) revealed the fracture surface of the impact samples and the gradient scattering of
nanoparticles in the epoxy matrix. Numerous applications can be used to manufacture the functionally
graded material by centrifugal casting method, including for the manufacture of gears and all bending
applications such as leaf springs.
This study Arabic dialect prevailing in the province of Khuzestan [southwest Islamic Republic of Iran] as one of the Arabic dialects abundant qualities and characteristics of linguistic entrenched in the foot, which includes among Tithe thousands composed of vocabulary and structures and phrases classical that live up to the pre-Islamic era, if what Tasha researcher and reflect accurately the find of a large number of phrases and vocabulary and acoustic properties by nature accent, and formal, and nature of the synthetic, and characteristics semantic and contextual in this dialect studied without being something of them heavy on the tongue and without displays her tune or Tasha or distortion and so on all of which constitute a catalyst i
... Show Moreمما لاشك فيه أنّ اندفاعنا للقيام بهذه الدراسة المتواضعة له أسبابه ، أهمها إن بعض الأبنية الصرفية مازالت مغمورة في ركام الدراسة قابعة تحت غبار الزمن على أساس أنها خارجة عن القواعد الصرفية الأساسية من غير مسوغ لهذا الخروج ، وهذه محاولة جادة للوقوف على بعضها ، لكي ننفض عنها الغبار لتخرج إلى النور ،
In this paper, some basic notions and facts in the b-modular space similar to those in the modular spaces as a type of generalization are given. For example, concepts of convergence, best approximate, uniformly convexity etc. And then, two results about relation between semi compactness and approximation are proved which are used to prove a theorem on the existence of best approximation for a semi-compact subset of b-modular space.
يعد موضوع المحل من المواضيع الشائكة في القانون المدني ، اذ ان هذا الموضوع رغم قدمه الا انه لازال يمثل ارضا خصبة للبحث ، اذ يوجد خلاف حول تحديد الكائن القانوني الذي يعد المحل ركنا فيه ، حيث اختلفت التشريعات في هذه المسألة ، فبعض التشريعات تذهب الى ان المحل ركن في العقد ، وبعضها يذهب الى ان المحل ركن في الالتزام ، وبعضها يذهب الى ان المحل ركن في العقد وركن في الالتزام وقد انتقل هذا الخلاف الى الفقه فظهر فيه عدة اتج
... Show MoreThe importance of this topic highlights through a multitude of research studies that addressed which attempted to determine the concepts and various dimensions and aspects which essentially associated with the intellectual background and the extraordinary specialization of the researcher or student or the angle of view that adopted to deal with this
السطح الكروي (Spherical Surface) السطح الكروي هو سطح منحني جزء من كرة . يسمى السطح الكروي محدب (convex surface) اذا كان مركز التكور له على اليمين ، ويسمى السطح الكروي مقعر(concave surface) اذا كان مركز التكور له على اليسار كما في الشكل (1) . السطح الكروي الذي يفصل وسطين شفافين له خاصية تجميع او تفريق الاشعة الضوئية المنكسره عليه نتيجة قوانين الانكسار ، وتطبيق قانون سنيل على السطح الكروي باستخدام العمود المقام على مماس النقطة التي يحدث
... Show MoreWer es heute beabsichtige, eine detaillierte Arbeit über die Rezeption des Nibelungenliedes zu schreiben, könnte damit einfach mehrere Bände wahrnehmen. Deswegen wird es sinnvoller sein, den Forschungsprozess auf bestimmten, aber wichtigen Aspekten zu skizzieren. Darum kann nur unter strikter Beschränkung auf die Hauptrichtungen, Hauptprobleme und Hauptfiguren des Liedes gewagt werden.
Der irakische Kritiker Moḥammed Šawqi Moḥammed Ḫalifa bedankt sich bei den „Dichtern des 12.Jahrhunderts, weil sie uns die deutschen Epen übertragen haben.“[1] Diese Epen kann man auch als Mythen betrachten, in denen sich Sagen und Märchen vermischen.
By taking a quick look at the glory history of our nation and the current reality of it, we find that the difference is clear between how we used to be and what we have become. This is what I call the regression of civilization that happened to our Muslim nation.