although the right for intellectual property as a branch of legal sciences is absolutely recognized in the world, there is dispute among jurists and lawyers with regard to even some of its primary problems, such as sale of such properties in our country. surveying some conditions of sale contract which seem controversial at a glance, such as necessity of object of sale being subjective, and exp...

abstract   aim and background: the purpose of the present study was to examination of the religious orientation and burden of family as predictors of treatment permanence of addiction. methods and materials: this descriptive, analytic cross sectional study was conducted on one hundred self-introduced addicts who reoffered to isfahan centers of addiction treatment during 2012-2013 were selected ...

the paper is concerning preliminary survey of qaradaq region of eastern azerbaijan in view of ecological, archaeological and ethnographic perspectives. the region under study is poor in fertile soil, underpopulated settlements and nomadic ubas being its dominant landscape. indeed, archaeological investigations show the lack of considerable archaeological records up to the iron age. the main sub...

In this paper, we study dynamic commensalism model with nonmonotic functional response, density dependent birth rates on time scales and derive sufficient conditions for the permanence. We also establish the existence and uniform asymptotic stability of unique almost periodic positive solution of the model by using Lyapunov functional method.

here, a predator-prey model with hassell-varley type functional responses is studied. some sufficient conditions are obtained for the permanence and global asymptotic stability of the system by using comparison theorem and constructing a suitable lyapunov functional. moreover, an example is illustrated to verify the results by simulation.

the aim of this paper is to identify and analyses the influence of shareholder ownership identity on payout ratio for a panel of iran firms from 2002 to 2008. we found that there is a significant positive correlation between institutional ownership and payout ratio. the relation between payout ratio and individual ownership is negative. the most finding of the study indicates that iranian compa...

privatization advocates believe that transfer to private sector increases firm’s performance and value, business environment, and therefore economic growth and welfare improves. in this research, by using the 70 accepted firms in the tehran stock exchange for the period of 2005 to 2009, we investigate the effect of firm’s ownership structure on their value by applying generalized method of mome...