climate change has various effects on the quantity of rainfall and warming also is lead to increases in frequency and intensity of droughts by accelerating earth drying up and consequently. it is effective on the curves of severity- duration- frequency of drought (sdf). the purpose of this study is to evaluate the effects of climate change on sdf curves in the future in qareh su basin located i...

Water resources design has widely used the average return period as a concept to inform management and communication of the risk of experiencing an exceedance event within a planning horizon. Even though nonstationarity is often apparent, in practice hydrologic design often mistakenly assumes that the probability of exceedance, p, is constant from year to year which leads to an average return p...

Stock return is usually considered to be affected by firm’s financial ratios as well as economic variables. Fundamental method assume that stock returns is not solely related to the stock market. Most result come from the company condition , industry situation and whole economy. In this paper, this relationship between stock return and fundamentals is studied using the data for 22 pharmaceutica...

using the treynor and mazoy model (expanded by fama to evaluate management performance for asset allocation among investment units), this paper examines the management’s performance in funds and investment companies in tehran stock exchange during 2004-2010. the results do not support the application of management market timing during the study period and managers were only able to create addit...

Several studies have indicated that the social, economic and other impacts of global warming can be linked with changes in frequency intensity extreme weather/climate events. Developing countries, particularly African region, are highly affected by events such as high temperature, usually followed/accompanied drought. Therefore, studying probability occurrence return period temperatures, possib...

With the rapid urbanization, waterlogging losses caused by rainstorm are becoming increasingly severe. In order to reveal correlations between characteristic elements, and make calculation of return period more reasonable objective, this study established joint distribution models elements using copula theory based on rainfall data in a Chinese megacity, Zhengzhou. Then their combined design va...