The goal of this paper is to identify the most promising sets of closest assignment constraints from the literature, in order to improve mixed integer linear programming formulations for exploration of information flow within a social network. The direct comparison between proposed formulations is performed on standard single source capacitated facility location problem instances. Therefore, in...

social interaction among different ethnic groups has been a major focus of study in the world in recent decades. the population of iran is composed of variety of ethnic groups (such as linguistic, religious and cultural) and for this study the people of different backgrounds are considered. this article will discuss the types of social interaction among different ethnic groups and the role of y...

objectives: the purpose of this study is to examine the use of assistive technology, social support in everyday life and psychological existential orientation for individuals with physical disabilities.  methods: forty-six elderly persons with physical disabilities (aged 73.7±10.6 years, range 53-93 years) were examined with regard to the use of assistive technology, social support in everyday ...