Social Harmony Equation (SHE) leads the social system to the evolution direction of social by accumulation of “social combustion substances”, i.e., the accumulation of microcosmic entropy increase “basic particles” (individual) in social system from assimilated “basic social energy” to dissimilated one; meanwhile, the catalysis of “social combustion promoter” (social excitation energy) has enha...

Due the success of emerging Web 2.0, and different social network Web sites such as Amazon and movie lens, recommender systems are creating unprecedented opportunities to help people browsing the web when looking for relevant information, and making choices. Generally, these recommender systems are classified in three categories: content based, collaborative filtering, and hybrid based recommen...

background: social issues have prominent effects on the peoples' physical and mental health and on the health risk factors. in iran, many organizations provide social care services to their target population. this study aimed to explore the roles and functions of primary health care (phc) system in providing social care services in iran.   methods: this was a qualitative study, for which data w...