the west of esfahan province, iran, is one of the most important agricultural areas throughout the country due to the climate variability and life-giving water of zayanderood river. rice is one of the major and economic crops in this area. the most important climatic elements in agricultural activities which should be considered include temperature, relative humidity, precipitation and wind. so...

Introduction: The economic growth and development of Asian countries, which began in the late 1970s were so rapid, so that at the end of the 20th century, in addition to Japan as the Asian economic giant, several other Asian countries, including China and India, were among the major economies. It can be said the most important factor influencing the rise of Asian countries and their position am...

any change in the refractive index of a laser active medium can lead to serious degradation of beam quality, laser beam modes, laser performance and variation in the intensity distribution. alteration in the refractive index of laser active medium is especially notable in high power lasers. it is clear that in the laser beam production, the pumping agent induces a great amount of heat which...