In the previous two parts of this series of papers, we introduced and studied a large class of analytic difference operators admitting reflectionless eigenfunctions, focusing on algebraic and function-theoretic features in the first part, and on connections with solitons in the second one. In this third part we study our difference operators from a quantum mechanical viewpoint. We show in parti...

This paper aims to identify key challenges facing Iran and South Korea in their bilateral trade and investment relations. In particular, it is concerned with the policy implications which can be useful for policy makers and business people of both countries. For this purpose, we review and analyze the recent developments of the Iranian economy and bilateral trade and investment relations betwee...

â â â â â â â â â â â  the recent global crisis, as a big crash ( baldwin and simon , 2009), has reduced foreign demand growth affecting total countries’ exports. given the importance of foreign trade to nations and the reality that recent crisis has affected international trade we study the effects of the global financial crisis on trade relations between countries by using ma and cheng (200...

Sustainable development is a Controversial concept which has been considered over the three decades. It is comprehensive development and includes all of dimensions as “economic’’, “social’’ and ‘‘environmental’’. In economic objective, it requires substantial economic change that can be brought about by investment and trade. They are effective factors of sustainable developm...

â  â  â  â â â  methods of speakers' effects on the audience â  â nasrollah shameli * â  fariba hosayni ** â â â  abstract â  this article is focused on four issues. the first issue is related to the speaker's external appearance including the beauty of face, the power of his voice, moves and signals by hand, the stick and eyebrow as well as the height. such characteristics could have...