Introduction: Among the environmental pollutions, noise is very important for its physiological  and psychological effects on human. Traffic noise is one of the most important pollutants and the  hospitals  are  one  of  the  critical  places  regarding  this  type  of  noise.  For  these  reasons,  in  the  summer  of  1382,  the  traffic  noise  of  Mashhad  main  streets  around  the  hospit...

an experiment with randomized complete block design with 3 replications was carried out in the rice research institute of iran, rasht, during 2008 to study the effect of supplement foliar application of nitrogen (5% n) and potassium (3% k2o) at different growth stages (maximum tillering stage, booting stage, and both of them) on grain quality and nitrogen efficiency of hybrid rice, c.v. bahar-1...

How do measures to increase turnout affect election outcomes? I use a novel approach to analyze how these measures influence both voter turnout and the candidates’ political positions. Generally, lowering the net expense of voting reduces political polarization. If the net expense of voting is made very low, then candidates no longer have an incentive to take partisan positions to motivate turn...

background: water is considered as the main source of life but water resources are limited and nonrenewable. different factors have caused groundwater to decrease. therefore, modeling and predicting groundwater level is of great importance. methods: monthly groundwater level data of about 20 years (october 1991 to february 2012) from the hamadan-bahar plain, west of iran were used based on peiz...

in order to evaluate a better sowing date of chickpea cultivars in dry land conditions, a factorial experiment in randomized complete block design with four replications was carried out at research station of bahar (hamadan province) during 2005-2006 cropping season. two planting time included winter and spring and four chickpea cultivars (cvs.) including one local (check) and three improved cv...