dust pollution has become a serious environmental problem especially in recent decades. the present study aim was the investigation of the levels of pm10 concentration in kermanshah, western iran and also measured five important heavy metals (pb, cd, as, hg and cr) in some samples during 2005 to 2011.a total 2277 samples were collected from air pollution measurement station belonging to the dep...

background: in the past three decades, tehran has experienced warmer summer so we need to determine heat-related mortality to establish appropriate public health activities during hot summers. the aim of the present study was to detect heat waves during the last decades and then determine excess mortality in immediate and lagged times. method: an ecological study based on time-series model was ...

Abstract Modes of climate variability can affect weather extremes, posing intractable challenges to our environment. However, what extent modes modulate heatwaves in China under a warming background remains poorly understood. Here, we examine the changes heatwave intensity seven distinct regions: three East, two middle, and west regions over systematically explore impacts modes, by analyzing ob...

Identity in recent decades, especially in social and national dimension, as one of the most key components of humanities and social sciences, considered very deeply by experts and scientists. This article attempts to examine national identity in the sphere of culture globalization and worldwide consumption culture. Because this culture includes different dimension, the article has done by the p...

Despite the advantages of the plastic limit analysis of structures, this robust method suffers from some drawbacks such as intense computational cost. Through two recent decades, metaheuristic algorithms have improved the performance of plastic limit analysis, especially in structural problems. Additionally, graph theoretical algorithms have decreased the computational time of the process impre...