Why are humans so vulnerable to pain in interpersonal relations and can so easily hurt others physically and emotionally? We theoretically examine whether being offensively strong but defensively weak can evolve as a strategic trait that fosters cooperation. We study a population comprised of “thick-skinned” and “thinskinned” agents by using an indirect evolution model that combines rational ch...

the present paper introduces the notion of the complete fuzzy norm on a linear space. and, some relations between the fuzzy completeness and ordinary completeness on a linear space is considered, moreover a new form of fuzzy compact spaces, namely b-compact spaces and b-closed spaces are introduced. some characterizations of their properties are obtained.

it is well known that the matrix exponential function has practical applications in engineering and applied sciences. in this paper, we present some new explicit identities to the exponential functions of a special class of matrices that are known as central-symmetric $x$-form. for instance, $e^{mathbf{a}t}$, $t^{mathbf{a}}$ and $a^{mathbf{a}t}$ will be evaluated by the new formulas in this par...

How science and policy interact has been a major research focus in the International Relations (IR) tradition, using the epistemic community (EC) concept, as well as in the alternative perspective of Science and Technology Studies (STS). Should science be autonomous and as apolitical as possible in order to ‘speak truth to power’, as suggested by EC or should the inevitable entanglement of scie...

2. Transformation in International Relations: The “Old” and the “New” ..........................................................3 2.1. Changes in Traditional International Relations .....................................................................................4 2.2. Cyberspace and The “New” International Relations:.............................................................................

this study investigates the effect of women's employment on family and social relations in the city of aran & bidgol. the theoretical framework of research is role conflict theory. survey methods is used in this study and the statistical population included all women working in the city of aran & bidgol. using cochran's formula and simple random sampling, 250 married women were select...