OBJECTIVES Accurate, objective measurement is important for understanding adolescents' physical activity (PA) behaviour. When using accelerometry to objectively measure PA, a decision must be made regarding how frequently data is recorded (i.e., epoch length). The purpose of this study was to examine i) PA bout length, and ii) the effect of variations in accelerometer epoch length on PA estimat...

on the one hand, the vacant position of study about impact of achaemenid empire on eastern states is due to silence by classic authors in dealing with these lands; and on the other hand, it is reffered to shortage of archeological artifacts relating to achaemenids at the given region. in the present essay, by the aid of reminiscent works and economic and administrative evidences obtained from e...