In this research, damping properties for composite materials were evaluated using logarithmic decrement method to study the effect of reinforcements on the damping ratio of the epoxy matrix. Three stages of composites were prepared in this research. The first stage included preparing binary blends of epoxy (EP) and different weight percentages of polysulfide rubber (PSR) (0%, 2.5%, 5%, 7.5% and 10%). It was found that the weight percentage 5% of polysulfide was the best percentage, which gives the best mechanical properties for the blend matrix. The advantage of this blend matrix is that; it mediates between the brittle properties of epoxy and the flexible properties of a blend matrix with the highest percentage of PSR. The second stage

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The present work aims to fabricate n-i-p forward perovskite solar cell (PSC) withئ structure (FTO/ compact TiO₂/ compact TiO₂/ MAPbI₃ Perovskite/ hole transport layer/ Au). P3HT, CuI and Spiro-OMeTAD were used as hole transport layers. A nano film of 25 nm gold layer was deposited once between the electron transport layer and the perovskite layer, then between the hole transport layer and the perovskite layer. The performance of the forward-perovskite solar cell was studied. Also, the role of each electron transport layer and the hole transport layer in the perovskite solar cell was presented. The structural, morphological and electrical properties were studied with X-ray diffractometer, field emission s

Epoxy (EP) – Silica (SiO2) composites are well known composites used in microelectronic industry . So it is important to study their dielectric behavior under different conditions such as
the presence carbon black (UV absorber) and immersion in the water for 30 days .
Dielectric properties were calculated over the frequency range 102 – 106 Hz for epoxy composites with different weight % of micrometer 1.5μm SiO2 particles (60%, 65% and 70wt%) modified with 0.5wt% silane coupling agent to improve adhesion between EP and SiO2 phases .

One of the constituents of the autonomy of constituent units of the federal State is the existence of an independent legal existence and the right to self-organization, ie, the ability to organize itself freely and at its own volition, without being imposed by the federal authorities. It is the federal states or regions that establish their own constitutions as well as their domestic laws, political system and government regulations, in a manner not inconsistent with the federal constitution. Such an idea and its application in Iraq was the subject of our study entitled "Organic Independence of the Federal Regions in accordance with the Constitution of the Republic of Iraq of 2005".    

    The experiment was conducted at the Agricultural Research Office in Baghdad during July 2020 to test the ability of nanomaterials (ZnO and TiO₂) to inhibit  ochratoxin A, which is produced by a number of microbiology (fungi) including: Aspergillus ochraceus, A. niger, ,A. steynii, A. carbonarius,  Pencillume verrucosum and P. nordicum. The standard ochratoxin A, with known concentration, was treated with different concentrations of nanomaterials  (20, 40, 60, and 80 ppm) and two different particle sizes of nanoparticles approximately (15 nm) and (70 nm) for each (ZnO) and TiO₂; with 16 transactions. Through an examination of the HPLC, the results showed that all tra

The research was conducted to study the effect of five exposure periods of microwave radiation (0,10,30,60 and 90) seconds on Nymph of the Green Peach Aphids Myzus persicae by counting the percentage of occured deformation ,rate of mortality percentage and emerged adults percentage, The study showed that the microwave radiation had a great effect on occurring deformation especially at the period 90 seconds, the exposure periods effect on the mortality percentage had a clear affect where the highest percentage of nymphs mortality was ( 52) for exposure period 90 seconds while it was found that the mortality was decreased to 48 and 24 for exposure periods 60 , 30 seconds which was significantly different in comparing with the control . The

It is necessary to examine the nature of the Turkish position and what Turkey seeks to achieve at the international, regional and Iraqi levels. Or is this external role an expression of foreign policy and has not yet reached the level of maturity that reaches the stage of strategy? The answer to this question is the essence of research in the Turkish role. The answer to this question requires the realization of the elements and pillars that guarantee Turkey's continuity and survival. Continuity is a cornerstone of the strategy. The continuity of the role and its interaction with the event and the ability to employ multiple alternatives are what qualify the state to describe its politics. The external strategy has evolved into. In order t

        The constitutional system in Iraq went to the necessity of the independence of the parliament in setting its internal system, for the purpose of organizing parliamentary work in parliament, so our research came to this decree (the role of the internal system of the Iraqi parliament in activating parliamentary performance), where the importance of this system is highlighted in the advancement of the reality of parliamentary work For members of the House of Representatives, in order to truly represent their constituents, as they are empowered to enable them to exercise the two most important functions. The first is to legislate laws, by discussing and adopting them within a reason