Real social interactions occur on networks in which each individual is connected to some, but not all, of others. In social dilemma games with a fixed population size, heterogeneity in the number of contacts per player is known to promote evolution of cooperation. Under a common assumption of positively biased pay-off structure, well-connected players earn much by playing frequently, and cooper...

Social media such as blogs, Facebook, Twitter, YouTube and Flickr enables people of all walks of life to express their thoughts, voice their opinions, and connect to each other more conveniently than ever. The boom of social media opens up a vast range of possibilities to study human interactions and collective behavior on an unprecedented scale. This dissertation presents a framework for learn...

Often we are less concerned with who signed something than with what attributes (director of this company etc.) they have. We propose three Attribute Based Signature schemes, namely, Decentralised Traceable Attribute Based Signatures DTABS, Attribute Based Signatures with UserControlled Linkability ABS-UCL, and Attribute Based Signatures with Hidden Expressive Policy ABS-HEP. The Traceability a...

one of the most traditional architecture and urban planning patterns is bazaar. the aim of this paper is studying social, economical and architectural features of traditional bazaars. the claim of this study is that they are significant relationship between social and economical values of bazaars with their architectural values. bazaar usually is located along the main routes of the city and ex...

In the past decade, two topics have generated much interest in the idea of social networks and network analysis. These are social capital, popularised by Robert Putnam, and small-worlds, popularised by Duncan Watts and Albert-László Barabási. Social capital highlights local processes and network structures, theorizing the ways in which relations and their patterns link individuals and groups to...

LTE broadcast is a communication standard which is expected to revolutionize the multimedia service provision in the future. The distinctive features of this standard such as increased service capacity, high spectral efficiency, and spectral adjustability have encouraged many companies to select this standard for the future generation broadcasting. In this paper, after a complete introduction o...

This study attempts to reveal the effect of family structure on social participation of  Payame Noor university students, it consists of 339 students. The theoretical framework of this investigation is based on two hypotheses. Hegen personality structure theory and Parsons action theory.  One hypotheses is on satisfactoriness in the family structure were based on personality structure theory an...