We systematically investigated the effects of Al-impurity type on the formation energy, crystal structure, charge density, electronic structure, and optical properties of ZnO by using density functional theory and the Hubbard-U method. Al-related defects, such as those caused by the substitution of Zn and O atoms by Al atoms (Als(Zn) and Als(O), respectively) and the presence of an interstitial...

iranian journal of engineering education vol.12 no.47 autumn 2010   proprietor: the academy of sciences of ir iran, department of engineering science   executive manager: prof. mahmood yaghoubi   editor-in-chief: prof. parviz davami   editorial board:   prof. hadi nadimi   shahid beheshti university   prof. daryosh safvat   university of tehran   prof. morteza sohrabi   amirkabir university of ...

created in 8th century a.h., daqayeq al-she?er is one of the most important rhetoric texts has ever been written. little attentions have been paid to it due to the published unreliable correction. the present paper is going to offer, using some reliable handwritten versions, some new-found information about the author, taj al-halvani, the place it was written in, and the life and the works and ...

a letter of ali ibn- hussein (peace be upon him) to mohammad ibn- moslem known as ibn- shahab zohri has been mentioned in some resources. in this letter, zohri has been reproached by ali ibn-hussein for his cooperation with bani omayeh. this letter is usually cited as an evidence in analysis of imam sajjad's political and social positions. surveying the resources and numerous books shows t...

?emsüddin es-Semerkandî mant?k, matematik, astronomi, mübâhase, felsefe ve kelam alanlar?nda yazd??? eserler ile kendisini aklî naklî ilimlerde kan?tlam?? önemli bir Türk-?slam âlimidir. Karakteristik problemlerde benimsedi?i görü?leriyle Hanefî-Mâturîdî kimli?ini ön plana ç?karan Semerkandî, gelenek içerisinde felsefî kelâm yöntemini benimseyen ilk âlim olarak temâyüz etmektedir. Cevher-araz h...

Frames play significant role in various areas of science and engineering. Motivated by the work of Chander Shekhar, S. K. Kaushik and Abas Askarizadeh, Mohammad Ali Dehghan, we introduce the concepts of $K$-frames for $B(mathcal{H, K})$ and  we establish some result. Also, we consider the relationships between $K$-Frames and $K$-Operator Frames for $B(mathcal{H})$.