just as motivation is important in sla research, demotivation constitutes an important factor, too. there are many studies done on demotivation and burnout of teachers. many of these studies have been conducted on one or two aspects of english instruction. consequently, there are few studies which have been done on more than two aspects of english teaching. the aim of this study is to find out ...

abstract In this study, using the financial information of 70 companies listed on the Tehran Stock Exchange during the years 2009-2017, the relationship between momentum and inverse profits with the size and ratio of book value to the market value of the company and the volume of transactions using multivariate regression models. Based on combined data has been studied. The research findings in...

This article examines the relationship between return, systematic risk, skewness and kurtosis in Tehran stock exchange during 2002-2006. Similar research, in this field, shows different results on upward and downward markets, therefore the period under study is divided into sub periods including upward market (2002-2004) and downward market (2004-2006) and the relationship between these sub per...

abstract: in this thesis, we focus to class of convex optimization problem whose objective function is given as a linear function and a convex function of a linear transformation of the decision variables and whose feasible region is a polytope. we show that there exists an optimal solution to this class of problems on a face of the constraint polytope of feasible region. based on this, we dev...

The present study was performed to determine the effect of short periods of starvation and re-feeding on liver index and thyroid hormones levels in Huso huso. 180 juveniles with an average initial weight of 34.58 ± 5.32 gr, treated in4 groups consisting of the control treatment (F) was fed 4 times daily to the extent of apparent satiety, SRF1 treatment with four alternating periods of two days ...