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.
The civil war in Seralion is considered as complex model of internal
conflicts in Africa because link to crises have relation to political, economical ,
social and cultural conditions, which were infected by disability and paralysis
in function performance, and what have effect on Seralion's relation
internationally or regionally.
In this research discussed three parts, the first is the factors of rise civil
war in Seralion , the second indicated the effected determiners in civil war in
Seralion , the third shown the factors of put end to civil war in Seralion .
The research concluded to significant reality that civil war in Seralion had
strategic effects on regional or international relations .
تحتل الرقابة المالية والإدارية أهمية كبيرة في عمل المؤسسات وتمثل المرحلة الإشرافية فيها وتُعد من أهم عناصر العملية الإدارية، ويأتي دور الأجهزة الرقابية لضمان تقديم الخدمات للمواطنين، بأسرع وقت، وبأقل جهد وتكلفة. واعتمدت الدولة العراقية منذ تأسيسها على جهاز رقابي خارجي واحد هو ديوان مراقب الحسابات العام المؤسس بالقانون رقم (17) لعام 1927 الذي كان يمارس أعمال الرقابة والتدقيق المالي والحسابي للمصروفات والإير
... Show MoreThe aim of this research is to find approaches between the communicative process and the teaching of art education. Postgraduate/Masters studies for the academic year 2022-2023.
In the light of this tool, the researcher reached a number of results, most notably: The art education teacher performs his communicative role correctly, as well as his ability to use verbal and non-verbal expressions and positive reinforcement clearly for the benefit of his students, and stimulates the largest number of their senses
This research concerned with studying act in contemporary painting , based on the role played by the act in achieving the structure of plastic art work artistically and aesthetically . The study consisted of three chapters: In the first one (the methodological framework) the problem has been displayed and the research aimed to detect : 1. The concept of the act in the structure of contemporary painting . 2. The impact of the act in the formation of the artistic style . as well as putting its boundaries represented in artistic movements : Abstract Expressionism , Pop Art and Conceptual Art within the period between 1945 and until the end of the seventh decade of the twentieth century. The Chapter II (theoretical framework) consisted of th
... Show Moreالتعددية السياسية في السنغال
Envy is a heart disease, a serious disease and a great evil that hurts its owner before it hurts others. The first crime that occurred in the creation was because of the envy between Abel and Cain.
This study is concerned with providing an objective, artistic study of the role of women in the pre-Islamic era, and extracting that status from the most important sources that express the language of that era, which is pre-Islamic poetry. The role of women in contemporary societies, the study sought to clarify those goals from a technical and objective point of view, which contributed to the main purpose of the study, which is the status of women in pre-Islamic poetry. The role of women in pre-Islamic society, and how to describe them in rhetorical sentences in poetry. The study was based on the descriptive analytical approach, which is represented by the use of content analysis, wh
... Show Moreالتحول الديمقراطي في بنغلادش
Visual discourse in cinema and television is an expressive medium that carries its audio and visual elements and is effective in influencing the memory of the recipient, according to multiple patterns of forms and representations aimed at persuasion, influence, entertainment, enjoyment and knowledge. This speech will not pass by the recipient without difficulty, as the multiplicity of forms and techniques of image presentation and the diversity of contents derived from different beliefs, concepts, ideas and perceptions may sometimes reach intersections and conflicts, which is reflected in the form of the screen and the theory of television. This motivates us to know the ways in which audio-visual discourse is produced on television, whic
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