نتایج جستجو برای: density distribution

تعداد نتایج: 974041  

رستگارزاده, گوهر, نجمی, محبوبه,

Energetic secondary particles in gamma and hadron initiated showers can generate Cherenkov photons. Using CORSIKA code and simulation data, different characteristics of lateral distribution of Cherenkov photon density are studied. In particular, physical origin of these differences and also dependence of this distribution on primary energy and altitude of observation level are discussed. It is ...

Journal: :international journal of environmental research 0
p. nassiri occ. hyg. dept., school of public health, tehran university of medical sciences, tehran, iran m.r. monazzam department of environmental health engineering, school of public health, tehran university of medical sciences, tehran, iran m. yunesian department of environmental health engineering, school of public health, tehran university of medical sciences, tehran, iran, center for environmental research, school of public health, tehran university of medical sciences, tehran, iran m.h. sowlat department of environmental health engineering, school of public health, tehran university of medical sciences, tehran, iran m.h. safari islamic azad university, science and research branch, tehran, iran s. momen bellah fard department of environmental science, graduate school of the environment and energy, science and research branch, islamic azad university, tehran, iran s.a. hosseini

the ever increasing rate of power consumption has led to an increase in public exposure to extremely low frequency magnetic fields (elf-mfs) and brought severe concerns about their health effects. considering previous studies and the facts about potential health effects of these fields, the present study aimed to evaluate the elf-mf flux densities from power distribution lines near hospitals in...

Journal: :journal of artificial intelligence in electrical engineering 2015
davoud karimzadeh

due to increasing expansion of energy consumption and also the decrease and tendency towardsending fossil energy reserves, the current energy cycle needs to use alternative energy speciallywind energy, because it’s considerably cheaper than other recycling sources. the presentresearch investigates suitable possibility of exploiting wind energy to create wind power stationin soltanieh zone of za...

Journal: :iranian journal of science and technology (sciences) 2010
a. aryadoust

the electronic structure, energy band structure and electronic density of 2 sno ceramic in cubicphase have been investigated using first principle full potential-linearized augmented plane wave (fp-lapw)method within density functional theory (dft). local density approximation (lda) and the generalizedgradient approximation (gga), which are based on exchange- correlation energy optimization wer...

Journal: :International Astronomical Union Colloquium 1991

2001
Emma Ryan-Weber Rachel Webster

The cross-section of sky occupied by a particular neutral hydrogen column density (NHI) provides insight into the nature of Lyα absorption systems. We have measured this column density distribution at z=0 using 21-cm Hi emission from a blind survey. A subsample of HI Parkes All Sky Survey (HIPASS) galaxies have been imaged with the Australia Telescope Compact Array (ATCA). The contribution of l...

2016
W. Reimers W. Treutmann E. Hellner P. Brown

In order to study the interstitial atoms in the NiAs-type structure MnSb the spin density distribution in MnFeg^gSB was investigated. The magnetic moment Fe Cu(Fe) = 1.0 ± 0.2 p^/atom) is polarized antiparallel to the magnetisation of the Mn-matrix. The unpaired electron configuration of Mn is the same as in Mnj QySb which indicates that the smaller, c-lattice parameter is due to a hybridisatio...

2012
Norman R. Swanson Cheng-Few Lee

The technique of using densities and conditional distributions to carry out consistent specification testing and model selection amongst multiple diffusion processes have received considerable attention from both financial theoreticians and empirical econometricians over the last two decades. One reason for this interest is that correct specification of diffusion models describing dynamics of f...

In this paper, we have obtained and presented new relativistic stellar configurations considering an anisotropic fluid distribution with a charge distribution and a gravitational potential Z(x) that depends on an adjustable parameter. The quadratic equation of state based on Feroze and Siddiqui viewpoint is used for the matter distribution. The new solutions can be written in terms of elementar...

Journal: :journal of agricultural science and technology 2010
s. khodayari y. fathipour k. kamali b. naseri

seasonal activity and spatial distribution of eoteranychus frosti mcgregor, tydeus longisetosus (elbagouy and momen) and zetzellia mali ewing were studied during 9th july to 22th october 2006 in an unsprayed apple orchard, maragheh region, northwest of iran. also the density dependence interaction between preys and predator was assessed. to estimate the spatial distribution pattern of these spe...

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