nowadays,tourism industry considered as one of the main sources of income of a country.unfortunately and despite of owning plenty of cultural historical and natural attractions, iran has not reached to a proper position in this field. besides, the historical cities of a country are considered as the income resource and national wealth of it. qazvin with a rich cultural precedent, have suitable ...

abstract this research is about a longitudinal case study of english morpheme acquisition by a persian speaking child l2 learner of english (2 .9-3).the goal of this research has been discovery of the child ‘s ability in acquiring of english morphemes in a persian context while only one person (the child’ s father)has been talking to her.this child has also been exposed to english languag...

boron nitride semiconducting zigzag swcnt, $b_{cb}$$n_{cn}$$c_{1-cb-cn}$, as a potential candidate for making nanoelectronic devices was examined. in contrast to the previous dft calculations, wherein just one boron and nitrogen doping configuration have been considered, here for the average over all possible configurations, density of states (dos) was calculated in terms of boron and nitrogen ...

Objectives This study was undertaken with the aim of delivering/implementing safety promotion and domestic violence prevention advocacy program in organizations, institutions and also individuals’ coverage by West Tehran Health Center. Methods This study is an action/operational research and a pilot study undertaken with both quantitative and qualitative research method approach. It is a...

One of the requirements for the development of societies and organizations is innovation, change in policies and policies, and the use of creative models in decision making. To achieve this goal, organizations must explore opportunities and identify new solutions and possibilities, and apply innovation in decisions. How to identify these opportunities and use them has always been a concern of p...

In the present paper, subsequent to expressing the theoretical approaches which explain the episteme-methodological basis of encountering and interpreting the social events, and by taking advantage of the social constructivism approach which culminated with publication of the well-known work by Peter Burger and Thomas Luckman, and combining its common aspects with those of other interpretive ap...

asymmetric membranes are widely used in many industrial membrane separation processes. the major advantage of membrane filtration over the conventional process is its ability to remove a wider spectrum of particles without using any chemicals. hollow fiber configuration offer many advantages over flat-sheet or tubular membranes. the spinning process of hollow fiber may look simple, yet it is te...