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.
There are many economic and financial visions that were mentioned in the book (Al-Anis Al-Mutreb in Rawd Al-Qirtas in the News of the Kings of Morocco and the History of the City of Fez). As this valuable book includes between its two covers, narrations that reveal important and pioneering events and practices that took place and were applied in the recent past on the scene of the countries of the Maghreb. This prompted the officials in the Marinid state to take quick measures to address and confront what happened. Despite the large number and severity of these repercussions and interactions, it is not the nature of this research to download texts and visions beyond what they can bear, but
... Show MoreIn this subject article analyzed features of a sports indifferent countries during , article analyzed features of a sports media in different countries between social change politcheskih , transformation thematic area dedicated sports periodicals and the influence of these media on the formation of national identity .
Subject of comparative analysis research are sports print media in Ukraine and Iraqi Kurdistan .And highlight the sports as one of modem Kurdish journalism in lraqi Kurdistan that emerged after the spring in 1991 which took her privacy in the field of journalism , and analysis with sports journalism in the era of the independent state of Ukнаraine in the early nineties of the past century .
The Andalusi did not leave any poetic art without expressing his psychological and sentimental emotions and the depth of emotions and it sincerity. We found Andalusian translated his emotions into poetry and in many different subjects
يمر عالمنا المعاصر اليوم بمرحلة من التطور والتغيير السريعين لم يسبق له أن مر بهما فـي تاريخ البشرية ، ويشمل مظاهر الحياة الأنسانية والأقتصادية والعلمية والتربويـة والنفسية وغير ذلك . وتختلف سرعة هذا التغيير من مجتمع الـى مجتمع آخر , وأدى هذا الى تراكم كميات كبيرة من المعلومات .
لقد أكد الكثير مـن التربويين أن التطور التكنولوجي فـي ال
... Show Moreه رثا قيقحتلو ،ةيبساحملا تامولعملا ةميق ةمئلام يف قيقدتلا ةنجلل ةيبساحملاو ةيلاملا ةربخلاو ةيللاقتسلاا ثحبلا تايضرف رابتخلا ةمزلالا تانايبلا عمجل ةنابتسا ةرامتسا مادختساب ةثحابلا تماق ةساردلا فده ةللاد وذ رثأ دجوي(يهو ةيبساحملاو ةيلاملا ةربخلل ةيئاصحإ ةللاد وذ رثا دجوي( ، )ةيبساحملا تامولعملا ةميق ةمئلام ىلع قيقدتلا ةنجل ةيللاقتسلا ةيئاصحا )ةيبساحملا تامولعملا ةميق ةمئلام ىلع ( نم تنوكت ةنيع ىلع تعزو ث
... Show MoreSystem is one of the concepts that fused stages of human thought his contemplations , and the evolution of his ideas and know the universe and existence , was formed several systems and numerous multi- humanitarian field , for example : the political system , the economic system , the system of philosophical , scientific system ... etc. .The current research around trying to find the identity of the system aesthetic in general and theater in particular , the detection of compositions and how Cklath within shifts functional and conceptual , which confirms the importance of Altgria creative as characterized by the following heading towards experimentation and update ongoing , and in particular what we find in the discourse of postmodernism
... Show MoreResumen
Este trabajo de investigación ofrece uno de los temas relevantes en la lengua, el cual es estudiar las dimensiones sintácticas, semánticas y pragmáticas de las preposiciones, en general, y de las dos preposiciones "Para" y "Por" en concreto, en una unidad linguística más amplia que la llamada "Oración". En la parte referida al estudio de las dos preposiciones mencionadas, estudiamos sus distntos usos funcionales, usos que se acercan, unas veces, entre sí y se alejan en otras.
Abstract
... Show MoreThe voice had a special place in the writting of the Andalusian poet (Ibn al-Abar ) , which aroused my attention because of the sonic capacity of the lettering inside the poetic at Ibn al-Abar poems . So Istudied the qualities of the lettering , structures and their exits . Scientists have not been able to determine the musical from the nonmusical sound , but we find the innate ability of Ibn al-Abar , which was able to determine this by using the lettering the right places and to revival the life to reflect the moments of his life , therefore came votes to express his purposes of praise and pride Etc. The poet Ibn al-Abar could exploit the lettering features in the effect of bilateral – static and moving and its ability to e
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