Snow observations are important in many mountain areas to quantify the water stored snowpacks and predicting runoff during melting period. In this study we compare performance of five different regional-scale gridded snow products reproduce equivalent (SWE) Upper Euphrates region (Karasu Basin, 10,275 km2), with from automatic weather stations catchment through Taylor diagrams. The compared ERA...

We consider portfolios whose returns depend on at least three variables and show the e ect of the correlation structure on the probabilities of the extreme outcomes of the portfolio return, using a multivariate binomial approximation. The portfolio risk is then managed by using derivatives. We illustrate this risk management both with simple options, whose payo depends upon only one of the unde...

We consider (max,+)-algebra products of random matrices, which arise from performance evaluation of acyclic fork-join queueing networks. A new algebraic technique to examine properties of the product and investigate its limiting behaviour is proposed based on an extension of the standard matrix (max,+)-algebra by endowing it with the ordinary matrix addition as an external operation. As an appl...

Water use productivity is one of the most important factors in scientific agriculture. It is equal to 0. 7 kg of production per cubic meter of irrigation water (Kg/m3) in Iran which is very low in comparison with advanced countries (1 to 2 Kg/m3). Current research studies temporal and spatialchanges of water use productivity in Hamedan province in Iran using Geographic Information System (GIS),...

To help improve customer satisfaction management (CRM), greater emphasis is given to the aspect of quality in the supply chain. And improve supply chain performance through integrated business management and strategic partnerships. On the other hand, strategic supply chain management decisions are made at a company level that determine benefits and efficiencies of the supply chain and effective...