in this paper the concept and the definition of the social and economic justice are evaluated considering the views of western and islamic thinkers and theorist and the focus is on the rationality. according to this evaluation, the criteria of economic justice in accordance with the islamic framework are extracted; which are: the equal availability of natural resources for everybody, the determ...

Using a unique dataset covering 106 economics journals over the period 1990–2011, we document trends in incidence of multiple positions, editorial duration and institutional background for 6192 board members. We put these figures into perspective using literature on boards directors measures market concentration. The picture that emerges is discipline with high concentration individual power, e...

One of the main problems in wind energy conversion system (WECS) is how to achieve maxim­u­m output power in different wind speeds. Maximum methods for maximum power point tracking in wind energy conversion syst­e­ms require the knowledge of system characteristics and mechanic sensors. So, using these methods practically will follow with high price and an abundant difficulties. In this pape...

This study based on investigation for integration wind power into conventional power system with its impact on fossil fuel generators and their generation management. Wind power as environmental friendly energy source can reduce the operational cost of the system due to considering no cost for energizing the generator in comparing with fossil fuel generators. However due to unpredictable nature...

cities have hinterlands which depend on various factors such as economic power, population, distance and etc. tehran megalopolis has also numerous hinterlands .tehran as the capital city of the country is considered at the top of urban system hierarchy and has a very special place from economic, political, educational and etc. points of view. all these abilities cause a daily stream of people f...

As the conception of and debates on regional powers have been led by political science, this paper aims to contribute to the discussion from an economics perspective. Based on the discussion of different concepts of economic power—such as those of Schumpeter, Perroux, Predöhl, or Kindleberger—concepts of technological leadership, and the global value chain approaches, the paper develops a resea...