background: the compositions of ferrous sulphate, agarose and xylenol orange dye (fax) and ferrous sulphate, gelatin and xylenol orange dye (fgx) in solution of distilled water and sulphuric acid are two tissue-equivalent gel dosimeters. ionizing radiation causes oxidation of fe2+ ion to fe3+ ions which diffuse through the gel matrix and blur the image of absorbed dose over a period of hours af...

this paper identifies characteristics of business cycles in iran, applying hodrick-prescott (hp) and band-pass (bp) filters. using seasonal and anual data for 1970-2003, it is found that oil income is the key driving factor of business cycles in the iranian economy. furthermore, it is indicated that iran's economy has experienced seven business cycles during this period, in which the econo...

The purpose of the present study was to evaluate reliability and validity General Aptitude Test (GAT), a national instrument for measurement aptitude/achievement in Kingdom Saudi Arabia as function daytime testing. Participants were 722 students who took on GAT across morning evening administrations within-person pre-post design. matched gender, parental education, test center characteristics (...