mathematics curriculum in schools is always a key position and is considered as an essential knowledge. so it is taught in the first years of school curriculum. this knowledge has focused on calculating the initial period. so this part of mathematics play an important role in lives of all people so this knowledge is essential for learning today. in the early years of primary school children, th...

al-aqad was a contemporary prominent critic and writer of egypt who by authoring the book about ibn al rumi life and his poems‚ tried to present thoughtful view points, about this great poet. he believed that ibn al-rumi was a great poet of abbasi era and was a poet laureate of his contemporary poets but unlike his literary position‚ he was not supported by the kings. it is worth noting that be...

Usability evaluation is an important and strategic activity in software projects (IEEE Computer Society, 2004). Its relevance had been recognized in the context of the user (Lindgaard & Chattratichart, 2007) and the software organization (Bak et al., 2008). However, several studies had identified important obstacles to its applicacion in software developement process (Bak et al., 2008; Ardito e...

in this paper, we introduce the concept of semihyperring $(r,+,cdot)$ together with a suitable partial order $le$. moreover, we introduce and study hyperideals in ordered semihyperrings. simple ordered semihyperrings are defined and its characterizations are obtained. finally, we study some properties of quasi-simple and $b$-simple ordered semihyperrings.

This paper presents a comprehensive theoretical, experimental, and economic study on the application of nanofluids as heat transfer fluid in waste heat recovery systems. The research work was conducted in a steel-making complex in which a plate heat exchanger had been used to recover heat from hot process water. The system was theoretically modelled and the effects of using nanofluids as he...

ZnO is a promising material suitable for variety of novel electronic applications including sensors, transistors, and solar cells. Intrinsic ZnO film has inferiority in terms of electronic properties, which has prompted researches and investigations on doped ZnO films in order to improve its electronic properties. In this work, aluminum (Al) doped ZnO (AZO) with various concentrations and undop...