In engineering practice, the unsteady flows generated from the operation of hydropower station in the upstream region could significantly change the navigation system of waterways located in the middle-lower reaches of the river. In order to study the complex propagation, convergence and superposition characteristics of unsteady flows in a long channel with flow confluence, a numerical model ba...

Similar to AC system, the insulation system of DC system also gets affected. The HVDC station is a challenging environment for measurement of partial discharge level due to very high interference levels caused from the switching of thyristor-controlled converters. There is also significant interference from external air-corona due to high electric stress at the surface of conductors and hardwar...

objective of this study is to determine whether there are significant changes in maximum temperature trends between the current (1981-2010) and future (2011-2099) periods. to this end, statistical downscaling is used to project future changes in the maximum temperatures according to a2 and b2 scenarios of hadcm3 in the 7 selected stations of iran. the possibilities of an accelerating trend are ...

salinity is a phenomenon that does not satisfy the crop water requirement and leads reduction vegetation. to control of this phenomenon requires appropriate management and monitoring of spatial and temporal salinity variations from the past to the present in this study the spatial and temporal changes of soil salinity of irrigation and drainage network located in garmsar, iran, is investigated ...

Objective: Most   neonates admitted to neonatal wards do not tolerate sufficient milk.  Recently the effect of erythromycin on increasing feeding tolerance in neonates has been studied. In this study the effectiveness of oral, high dose Erythromycin a prokinetic agent was used to enhance feeding tolerance in these neonates.  Methods: This prospective randomized controlled clinical trial was con...

hydrologists have always tried to classify atmospheric and hydrologic events in order to simplify the hydrologic convolutions and the observations or to save the time and the budget. most of these methods are used for the regionalization of hydrologic phenomena like rainfall,streamflow and other components of water cycle.multivariate techniques have been underlined as suitableand powerful tools...

aim and background: the present study aimed to investigate the symptom severity and quality of life in patients suffering from bipolar disorder. methods and materials: this longitudinal and prospective study was done on 20 patients with bipolar type i disorder who were hospitalized in noor hospital of isfahan, iran. patients were evaluated before hospitalization, at the time of discharge, 3 and...