the hydrogen abstraction reaction by oh radical from ch2brch2br (r1) and ch₃chbr2 (r2) is investigated theoretically by semi-classical transition state theory. the stationary points for both reactions are located by using ωb97x-d and kmlyp density functional methods along with cc-pvtz basis. single-point energy calculations are performed at the qcisd(t) and ccsd(t) levels of theory with differe...

emergence of new communication technologies made media industry available for small and entrepreneur media firms to enter venue, while before them the arena belonged to big media companies. now media industry includes a lot of small enterprises which market now innovations, even with limited resources, thanks to these new technologies. the same trend occurred in iranian media market too, but de...

The hydrogen abstraction reaction of OH radical with CH3CH2OCF2CHF2 (HFE-374pc2) is investigated theoretically by semi-classical transition state theory. The stationary points on the potential energy surface of the reaction are located by using KMLYP density functional method along with 6-311++G(d,p) basis set. Vibrational anharmonicity coefficients, ...

Plato in Theory of Philosopher-King believes that all of the members of ideal city-state, whether ruler or citizens, will attain happiness if the philosopher is the ruler. But there are paradoxes in the theory and the bases of the happiness are unstable too. In other words, Plato in his theory presents hierarchical dualities (Intelligible/Visible world, Episteme/ Doxa,True/ Untrue Or Shadow, …)...

numerous studies have been conducted about the role of media during a crisis. accordingly diverse functions have been defined for media while in crisis. by applying a prescriptive viewpoint to derive mass media functions, most of the studies have been the based on the opinions of experts and the opinions of the victims have rarely been taken into consideration. for the first time, we have direc...

Reading is a hobby to open the knowledge windows. Besides, it can provide the inspiration and spirit to face this life. By this way, concomitant with the technology development, many companies serve the e-book or book in soft file. The system of this book of course will be much easier. No worry to forget bringing the media society world social theory and digital media practice book. You can ope...

This study proposes a behavioral complexity theory for media selection in global virtual teams. This theory captures multiple contingencies into one holistic approach. Unlike existing linear and mechanistic theories of media selection, this heuristic theory moves away from the universal models that were previously proposed. The behavioral complexity theory assumes ambiguity, complexity, and a n...