Online virtual worlds such as Second Life provide a rich medium for unstructured human interaction in a shared simulated 3D environment. However, many human interactions take place in a structured social context where participants play particular roles and are subject to expectations governing their behaviour, and current virtual worlds do not provide any support for this type of interaction. T...

In the future, human destiny may depend on our ethics. In particular, biotechnology and expansion in space can transform life, raising profound questions. Guidance may be found in Life-centered ethics, as biotic ethics that value the basic patterns of organic gene/protein life, and as panbiotic ethics that always seek to expand life. These life-centered principles can be based on scientific ins...

health can affects human abilities, functions and even his life quality, and hence has important role in determination of human capital through production processes. the aim of this study is to examine the effect of income inequality on selected health indices in iran during 1976-2007. in this study an attempt has been made to analyze the relationship between income inequality and the both of l...

In 1949, several decades before the birth of the PC, computer scientist John von Neumann announced, “It would appear we have reached the limits of what is possible to achieve with computer technology.” He quickly and prudently added, “One should be careful with such statements; they tend to sound pretty silly in five years.” More than half a century later, it is Neumann’s caveat rather than his...