this paper is a comparative study of legal aspect of islamic securities (sukuk), between iran (as shia fiqh) malaysia (as the first country that issued sukuk based on sonni fiqh) and england (as a chief western country in sukuk). results indicate many similarities between iran and malaysia rules despite specifications with england rules. different in definition of contract, asset valuation, lim...

Piéron's Law is a psychophysical regularity in signal detection tasks that states that mean response times decrease as a power function of stimulus intensity. In this article, we extend Piéron's Law to perceptual two-choice decision-making tasks, and demonstrate that the law holds as the discriminability between two competing choices is manipulated, even though the stimulus intensity remains co...