نتایج جستجو برای: the fire

تعداد نتایج: 16063331  

Journal: :محیط شناسی 0
علی سرکارگر اردکانی دانشجوی دکتری سنجش از دور دانشکدة مهندسی نقشه برداری دانشگاه صنعتی خواجه نصیر الدین طوسی محمد جواد ولدان زوج دانشیار گروه سنجش از دور دانشکدة مهندسی نقشه برداری دانشگاه خواجه نصیر الدین طوسی علی منصوریان استادیار گروه سنجش از دور دانشکدة مهندسی نقشه برداری دانشگاه خواجه نصیر الدین طوسی

according to reports of forest range and watershed management organization of iran, hundreds of forest fires take place in our country every year. due to destroying forest and grass land in different parts of iran, especially in zagross and alborz mountain, it is necessary to develop new methods to reduce fire effects in these places. there are many parameters that increase probability of fire ...

Journal: :journal of agricultural science and technology 2014
r. jahdi a. a. darvishsefat v. etemad m. a. mostafavi

lack of fire behavior studies and the immediate needs posed by the extent of the fire problem in forests of iran require that extensive studies be conducted to develop models to predict fire behavior in the region.in this study, farsite fire area simulator was applied to simulate spread and behavior of two real fires that had occurred in northern forests of iran during 2010 summer and fall seas...

ژورنال: Journal of Railway Research 2015

In this research a fire scenario was simulated in one of the stations of the line 7 of Tehran's subway system. The Line 7 is under construction and the ventilation system is under design. Fire was set for a stopping metro train at the platform of the station. A 160 meter length eight-car metro train with the forth wagon on the fire was studied. The heat release rate is based on a quadratic f...

In this study, the amount of generated pool fire, as a result of the release of chemicals in the case of an accident in tunnels, was simulated and the results were compared to the experimental data. At first, various amounts of spatial resolution (R*) were considered to compare the existing experimental data at different heights at the upstream, downstream and above the pool fire...

Constructing new urban facilities requires precise study of the proper sitting in different parts of a city. The first point for the accurate allocation of urban facilities, is to select the optimal site regarding different conditions and it matters when it comes to important factors such as saving lives and safety of the people. Therefore, the optimal site selection of fire stations is essenti...

S.A Azimfar Y Sedigh

The spent fuel assemblies (FAs) of Bushehr Nuclear Power Plant are planed to be transported by TK-13 casks. Each spent fuel transportation cask holds 12 spent FAs and has a thick steel container to provide shielding. The calculations have been performed for FAs with burn ups of 60 MWd/kg and a 3-years cooling period. The ANSYS®10.0 general finite element analysis package was se...

Journal: :international journal of environmental research 2015
a. mavrakis l. salvati

greece has experienced particularly severe and frequent forest fires during summer 2007 together with exceptionally dry meteorological conditions culminated in distinct heat waves. the present study analyzes the time pattern of daily values of two fire risk indices (nesterov and angstrom) based on meteorological data made available for a number of gauging stations between 1 june and 31 august o...

شریفیان, سیداکبر, اصغری, فریبا , فتوحی, اکبر , کریمی, علیرضا ,

Hearing loss is a controversial occupational disease in fire fighters because exposure to hazardous levels of noise in this job is so variable and unpredictable. In this study, audiometric assessments were performed on 117 fire fighters to evaluate their hearing loss. The results showed that the average fire fighter has a characteristic noise-induced threshold shift, with maximum hearing loss o...

دهقانی, فاطمه, عسکری, علی, نصرالهی, عارف, هراتی, بهرام, کریمی, علی,

Introduction: Being aware of the explosion, fire radius, and their damages, has an important role in accident prevention methods. Therefore, the aim of this study was modeling and evaluation of the consequences of propylene oxide spill in a petrochemical company.   Material and Method: The QRA method including seven steps was used in this study. In the present study, in order to examine and...

The Smagorinsky and One-Equation sub-grid scales (SGS) for modeling of large scale pool fire using Large Eddy Simulation (LES) has been used and compared. The fire heat release rate was 2.07 MWatt and the fuel was Methane. Based on the mixture fraction approach and infinity fast chemistry assumption, the mean velocity profile and turbulence kinetic energy are calculated and compared against exp...

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