1 Youngs Researchers Club and Department of Basic Sciences, Islamic Azad University, Ayatollah Amoli Branch, P.O. Box 678, Amol, Iran 2 Department of Mathematics Education and the RINS, Gyeongsang National University, Chinju 660-701, South Korea 3 Department of Mechanical Engineering, Islamic Azad University, Ayatollah Amoli Branch, P.O. Box 678, Amol, Iran 4 Department of Mathematics and Compu...

In this study, recorded empirical data were applied with a practical approach to investigate the optimal tilt angle of flat plate collectors facing south for long period in Tehran, Iran. The included 20 years average total radiation on horizontal plane Tehran’s meteorological station. Based previous studies, annual optimum Tehran was estimated at 33 degrees annually; however, estimation does no...

On 2 June 2014, at about 13 UTC, a dust storm arrived in Tehran as severe hazard that caused injures, deaths, failures power supply, and traffic disruption. Such an extreme event is not considered common for the area, which has raised question of storm’s origin need increasing citizens’ preparedness during such events. The analysis observational data numerical simulations using coupled dust-atm...

this study intends to monitor and evaluate the thms concentration in the 7 different water districts in the city of tehran. thms are the main disinfectant by products (dbp) of chlorination, which are suspected to be human carcinogens. chlorination is used as the main disinfection process for the drinking water in tehran, therefore; it is important to monitor and evaluate the thm’s concentration...

This paper describes a series of field studies and simulation analysis to improve the thermal performance of school buildings in the city of Tehran in Iran during warm season. The field studies used on-site measurement and questionnaire-based survey in the warm spring season in a typical female secondary school building. The on-site monitoring assessed the indoor air temperatures and relative h...

Given that Mandarin is a tone language and English is not, the present study investigated the perception of Mandarin tones in young school-aged children with or without tone language exposure. Mandarin Monolingual (MM), English-Mandarin Bilingual (EMB) and English Monolingual (EM) children aged 6 to 8 years participated in tone identification and discrimination tasks. Tone identification and di...

Background: The criteria for the quality control of Iranian fresh produce are the total microbial count, Enterococcal count and the detection of Escherichia coli. The aim of this study was to assess microbial contamination of fresh vegetable and salad samples consumed in Tehran, Iran. Methods: From May to October 2013, freshly vegetable (n=100) and salads (n=100) samples were randomly co...