there are different approaches to business model categorization. [5] in a point of view, the e-business model patterns can be categorized to content provider, direct to customer (d2c), full-service provider, intermediary, shared infrastructure, value net integrator, virtual community, and whole of enterprise.

In network analysis, a community is typically considered of as a group of nodes with a great density of edges among themselves and a low density of edges relative to other network parts. Detecting a community structure is important in any network analysis task, especially for revealing patterns between specified nodes. There is a variety of approaches presented in the literature for overlapping...

this study seek to examine performance of feltham - ohlsen (1995)valuation model at the tehran stock exchange and is trying to identify relation between intrinsic company value and return. this model is trying to determine the intrinsic value of company using their book value. statistical community of this study includes all tse accepted companies and statistical sample is including 37 tse acce...

An epidemic model with optimal control strategies was investigated for Hepatitus C Viral disease that can be transmitted through infected individuals. In this study, we used a deterministic compartmental model for assessing the effect of different optimal control strategies for controlling the spread of Hepatitus C disease in the community. Stability theory of differential equations is us...

Both authors of this paper have been engaged in the community networking movement and its evolution for many years in an ongoing effort to help create online systems that meet human needs. Among other things, community networks are intended to help address shared "public affairs" in geographical areas. Although this goal is important and laudable, community networking communities are often unab...