نتایج جستجو برای: natural ventilation

تعداد نتایج: 527517  

Journal: :iranian journal of radiation research 0
l.a. mehdipour department of physics, faculty of science, university putra malaysia, malaysia s.m.j. mortazavi department of medical physics and medical engineering, school of medicine, shiraz university of medical sciences, shiraz, iran e.b. saion department of physics, faculty of science, university putra malaysia, malaysia h. mozdarani department of medical genetics, faculty of medical sciences, tarbiat modares university, tehran, iran s.a. aziz department of physics, faculty of science, university putra malaysia, malaysia h.m. kamari department of physics, faculty of science, university putra malaysia, malaysia

background: in iran, architectures are often unaware of the risk of radon inhalation and how to reduce radon levels. furthermore, radon considerations are not implemented in construction methods, construction materials and building utilization by regulatory authorities. materials and methods: in this study after reviewing the meteorological changes of ramsar over the past 50 years (1955-2005), ...

Journal: :journal of agricultural science and technology 0
r. shamshiri department of agricultural and biological engineering, university of florida, gainesville, fl 32611, usa. p. van beveren farm technology group, wageningen university, p. o. box: 16, nl-6700ah wageningen, the netherlands. h. che man department of biological and agricultural engineering, universiti putra malaysia, serdang, 43400, malaysia. a. j. zakaria institute agropolis, universiti sultan zainal abidin, campus tembila, kuala terengganu, malaysia.

net-screen covered greenhouses operating on natural ventilation are used as a sustainable approach for closed-field cultivation of fruits and vegetables and to eliminate insect passage and the subsequent production damage. the objective of this work was to develop a real-time assessment framework for evaluating air-temperature inside an insect-proof net-screen greenhouse in tropical lowlands of...

Journal: :international journal of architecture and urban development 2015
nasrin ebrahimi nahal eghtesadi mohammad farhadi

despite the similar performance of bazaar1 in different cities of iran, there are some the skeletal differences between markets in different climates. the bazaar roof protects customers against natural events in any climate. the ceiling height and the sitting down of the bazaar`s floor are determined based on the need for air circulation and movement in various climates. hence, combination of a...

ژورنال: سنجش و ایمنی پرتو 2018

Due to the increasing of closed ventilation systems used in buildings, the risk of indoor radon is increased day by day. In this study, we selected two sample rooms to calculate the radon emission coefficient from different levels, radon concentration measured when the natural ventilation was completely closed and compared with the analytical results. The results clearly show the difference in ...

Journal: :iranian red crescent medical journal 0
meghdad pirsaheb environmental health engineering department, school of public health, kermanshah university of medical sciences, kermanshah, ir iran farid najafi epidemiology research center (keerc), kermanshah university of medical sciences, kermanshah, ir iran abbas haghparast medical physics department, faculty of medicine, kermanshah university of medical sciences, kermanshah, ir iran lida hemati research center for environmental determinants of health, kermanshah university of medical sciences, kermanshah, ir iran; environmental health engineering department, school of public health, ilam university of medical sciences, ilam, ir iran; research center for environmental determinants of health, kermanshah university of medical sciences, kermanshah, ir iran. tel: +98-9187240367; fax: +98-8118380509 kiomars sharafi school of public health, kermanshah university of medical sciences, kermanshah, ir iran nematullah kurd department of occupational health engineering, faculty of health, ilam university of medical sciences, ilam, ir iran

results in terms of radon and thoron emissions, travertine and plaster were found to be the most appropriate and inappropriate covering for walls, respectively. furthermore, granite and travertine were discovered to be inappropriate materials for flooring, while plastic floor covering was found suitable. natural ventilation performed better for radon, while artificial ventilation worked better ...

Journal: :international journal of architectural engineering and urban planning 0
ebrahim nabizadeh shahrebabak soha golafshan mohammad r. chamani

one of the main architectural characteristics in the central area of iran is the relation between life and climatic conditions; e.g., the four-seasonal house which is a typical kind of the central-yard house. as the climate of isfahan is more pleasant than other desert regions in the central part of iran, wind towers are replaced with skylights to ventilate the pool area of hoze-khane. so far, ...

Journal: :معماری و شهرسازی آرمان شهر 0
omid rahaei assistant professor of architecture, department of architecture, shahid rajaei teacher training university, tehran, iran.

the natural ventilation is an easy way to exchange the indoor polluted warm air with outdoor fresh air. the wind power injects outdoor fresh air into the building. a good indoor air current and subsequently a proper exhaust depend on the openings’ conditions and their situations. a serious architectural question is under what conditions of the openings the wind-cross ventilation can be effectiv...

The natural ventilation is an easy way to exchange the indoor polluted warm air with outdoor fresh air. The wind power injects outdoor fresh air into the building. A good indoor air current and subsequently a proper exhaust depend on the openings’ conditions and their situations. A serious architectural question is under what conditions of the openings the wind-cross ventilation can be effectiv...

A. Mortazavi, E.B. Saion, H. Mozdarani, H.M. Kamari, L.A. Mehdipour, M.R. Kardan, R. Faghihi, S. Mehdizadeh, S.A. Aziz, S.M.J. Mortazavi,

Background: In Iran, architectures are often unaware of the risk of radon inhalation and how to reduce radon levels. Furthermore, radon considerations are not implemented in construction methods, construction materials and building utilization by regulatory authorities. Materials and Methods: In this study after reviewing the meteorological changes of Ramsar over the past 50 years (1955-2005), ...

Journal: :international journal of architectural engineering and urban planning 0
mohammadjavad mahdavinejad tarbiat modares university soha matoor tarbiat modares university amene doroodgar tarbiat modares university

mosque architecture is considered as a potent visual symbol of the islamic architects’ design ability. prayer-hall as the manifestation of equality between the believers and the unity of architectural space has challenged such an ability throughout the history. this study, considering the characteristics of light-openings in the domes of iranian mosques’ prayer-hall, aims to investigate these d...

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