chapter one is devotod to collect some notion and background informations, which are needed in the next chapters. it also contains some important statements which will be proved in a more general context later in this thesis. in chapter two, we show that if the marginal factor-group is of order np1...pk,n>1, then we obtain a bound for the order of the verbal subgroup. also a bound for the bear-...

abstract: the present study was undertaken to investigate whether 1) there is any significant correlation between iranian efl/eap learners’ l2 writing proficiency and their willingness to communicate, 2) there is any significant difference between efl and eap learners in terms of willingness to communicate, 3) there is any significant difference in wtc of iranian efl/eap learners with 1- nati...

Introduction: The purpose of this research was to investigate the structural model of the relationship between narcissistic personality and vulnerable attachment with bullying and psychological capital. Method: The design of the research was correlation and the statistical population was all of telecommunications company employees in Tehran while 345 employees were selected as sample using sim...

Despite the importance of physical activity is clearly accepted by all, motivation and participation in physical education declines with age. Therefore, the aim of this study is to investigate the relationship between the social support behavior of physical education teachers and motivation (absence of motivation) of student in P.E activities. This is a descriptive and correlation study. In doi...

Objectives The aim of this study was to evaluate the structural relationships between behavioral brain systems, disgust sensitivity, and obsessive-compulsive disorder using structural equation modeling. It is assumed that the behavioral brain systems and disgust sensitivity in interaction with each other will lead to obsessive-compulsive disorder. Despite the prominence of this model, not eno...

abstract: in the paper of black and scholes (1973) a closed form solution for the price of a european option is derived . as extension to the black and scholes model with constant volatility, option pricing model with time varying volatility have been suggested within the frame work of generalized autoregressive conditional heteroskedasticity (garch) . these processes can explain a number of em...

Objective: The aim of this study was to investigate the pattern of structural relationships of relapse in individuals with substance use disorder based on attentional bias and reward sensitivity with the mediating role of inhibition control. Method: The present study was descriptive-correlation of structural equation modeling type. The statistical population of this study included all withdrawi...

Objectives: The goal of this study was modeling emotional disorders based on fear and distress factors in non-clinical Iranian population. Method: In this study which was based on structural equation modeling plan, 800 undergraduate students from Shahid Beheshti University of Medical Sciences were selected by a multi-level clustering method, and were asked to complete Albany Panic and Phobia Qu...