Drought is a natural hazard that has significant impact on economic, agricultural, environmental, and social aspects. In the present study details analysis of rainfall data has been carried out for the years 1981-2011. Standard precipitation index (SPI) has been used to evaluate the precipitation deficit in the Karun watershed of Iran. The results indicated that 1981-82,82-83,83-84,84-85,88-89,...

Air quality, like weather, can affect everyone, but responses differ depending on the sensitivity and health condition of a given individual. To help protect exposed populations, many countries have put in place real-time air quality nowcasting and forecasting capabilities. We present in this paper an optimal combination of air quality measurements and model outputs and show that it leads to si...

BACKGROUND The impact of air pollution on asthma in children in different age group has not been well defined. OBJECTIVE This study aimed to evaluate the association between seasonal variations in air pollution and asthma hospitalization of children within a two-year period. METHODS Using the National Health Insurance database, seasonal variations in hospitalization trends in children with ...

As a standard to by which characterize the ability of ships ascend rapidly, rapid suppression hydraulic index is main indicator regulatory effect and an important component channel engineering research. This study reviewed current determination methods forms expression revealed that existing comprehensive indices unit energy have obvious disadvantages, such as critical standards not being unifi...

the liquefaction resistance of soil can be evaluated using laboratory tests such as cyclic simple shear, cyclic triaxial, cyclic torsional shear as well as field methods like standard penetration test (spt), cone penetration test (cpt) and shear wave velocity (vs). in this regard, this study attempts to compare the results of the spt based on the simplified procedure proposed by seed and idriss...

background: in order to evaluate educational courses, usually different criteria of student and academic staff are being used. these criteria for students include their number, fields, the ratio of post-garaduate students to all students, and for staff, they are composed of their number, their rank in the academic pyramid, as well as the ratio of students to academic staff classified based on t...