Diffuse pollution problems involve numerous different organizations and this requires decision makers to involve different actors if they want to develop policies that have a chance of being implemented effectively. A first step in such interactive policy development would be to gain an overview of the different actors involved in diffuse pollution problems, as well as their views on the proble...

Outbreaks of bluetongue (BT) have occurred for the first time among sheep in Khartoum province, the Sudan. The morbidity rate approach­ ed 100% while the mortality rate was 40%. The disease was successfully repro­ duced by experimentally infecting lambs, and the virus was reisolated from them. Viral antigen was detected directly in the blood plasma and serum from the naturally and experimentall...

gilan province is among the most important regions of iran for rice production. the general aim of this research is to determine the best variety of rice for planting, so that the minimum level for farmer's expected living gross margin can be provided. on the other hand, determining the best variety with regard to the risk in price is another aim of this research. to this end two risk models ba...

in the beginning of 1980s named as entrepreneurship decade, a large number of entrepreneurship researchers attempted to determine certain characteristics that distinguished entrepreneurs from non-entrepreneurs by identifying certain characteristics inherent in potential entrepreneurs in order to predict entrepreneurial behavior. among the characteristics identified, little empirical research ha...