We investigate the spread of innovations on a social network. The network consists of agents that are exposed to the introduction of a new product. Consumers decide whether or not to buy the product based on their own preferences and the decisions of their neighbors in the social network. We use and extend concepts from the literature on epidemics and herd behavior to study this problem. The ce...

Considering vicinity as a mere prerequisite but not an ample cause needed for creation of a relationship, the paper investigates the interfering factors playing a significant role in social life of residential complexes habitats.Data for survey were collected through dividing the residential complexes in two groups of homogeneous and heterogeneous. In this way, we selected four residential comp...

If preferences or budgets are heterogeneous across people (as they clearly are), then individual costof-living indices are also heterogeneous. Thus, any social cost-of-living index faces an aggregation problem. In this paper, we provide a solution to this problem which we call a ’common-scaling’social cost-of-living index (CS-SCOLI). In addition, we describe nonparametric methods for estimating...

The exploration of social networks is essential to find capable collaborators who can help problem-solving and to augment cooperation between users. This paper describes an agent based social networking system called PeCo-Mediator-II for seeking for a collaborator with the chain of personal connections (PeCo) in distributed organizations. This system helps gathering, exploring, and visualizing ...

catalytically graphitized electrospun carbon nanofibers adorned uniformly with fine nickel nanoparticles were successfully prepared. the procedure was based on the electrospinning technique and the use of nickel precursor to create both graphitized nanofibers and nickel nanoparticles under a relatively low-temperature heat treatment. the x-ray diffraction and raman results clearly proved cataly...

We advance a theory-driven approach to stereotype structure, informed by connectionist theories of cognition. Whereas traditional models define or tacitly assume that stereotypes possess inherently Group → Attribute activation directionality (e.g., Black activates criminal), our model predicts heterogeneous stereotype directionality. Alongside the classically studied Group → Attribute stereotyp...

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. An essential assumption underlying this phenomenon is positively biased payoff structure so that more connected players earn more by...

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 payoff structure, well-connected players earn much by playing frequently, and coopera...