Order is the key word of science. Scientists have tried to order and explain all the phenomena of the universe. They found that the planets and stars move along predictable paths, discovered the laws of gravitation and devised formulae to describe inheritance. For them, the universe is like a clock. Their mission is to discover and explain the mechanism of this clock and thus explain the laws t...

steel production in iran has been recorded since fourteen century b.c. however the main growth and development in steel industry has occurred in recent decades. steel industry has important role in development of industrial countries, and also steel consumption may consider as an important ind ices in the development process. this pap er has analyzed two main complexes (zobe ahan and mobarakch)...

An individual’s decision to reason about a problem may involve trade-off between cognitive costs and notion of value. This paper analyzes the primitive properties that must hold for stop thinking be represented by cost-benefit analysis. We then provide additional give more structure value reasoning function. show how our model applies variety settings, including contexts involving R&D applicati...