نتایج جستجو برای: electromagnetic field

تعداد نتایج: 842886  

2010
Jun Liu Gao Lin Fuming Wang Jianbo Li

Computation electromagnetic is an important research field of electromagnetic fields and microwave technology subjects. In this paper, the scaled boundary finite element method (SBFEM) is extended to solve one type of electromagnetic field problems-electrostatic field problems. Based on Laplace equation of electrostatic field, the derivations and solutions of SBFEM equations for both bounded an...

2012
Iliana Marinova Valentin Mateev

For investigations of electromagnetic field distributions in biological structures by Finite Element Method (FEM), a method for automatic 3D model building of human anatomical objects is developed. Models are made by meshed structures and specific electromagnetic material properties for each tissue type. Mesh is built according to specific FEM criteria for achieving good solution accuracy. Seve...

2017
Maryam Jazayeri Mohammad Ali Shokrgozar Nooshin Haghighipour Bahram Bolouri Fereshteh Mirahmadi Mehdi Farokhi

OBJECTIVE Most people experience bone damage and bone disorders during their lifetimes. The use of autografts is a suitable way for injury recovery and healing. Mesenchymal stem cells (MSCs) are key players in tissue engineering and regenerative medicine. Their proliferation potential and multipotent differentiation ability enable MSCs to be considered as appropriate cells for therapy and clini...

2007
Hosein Ali Yousefi

Background: In psychological studies, exposure to electromagnetic field is one of the hazardous factors, which has adverse effects on mental health. Exposure to electromagnetic field due to daily use of electricity makes this study so important. The goal of this study was to determine the relationship between psychological symptoms and occupational exposure to electromagnetic field among worker...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شیراز - دانشکده علوم 1386

چکیده ندارد.

2004
Gerrit Mur

When computing an electromagnet ic field using the f ini te element method it is possible that, although Maxwell’s equations are discret ized accurately, highly inaccurate computational results are obtained. In those cases it can easily be s h o w n that (some of) the electromagnetic compatibi l i ty relations (field properties that follow from Maxwell’s equat ions) are not satisfied. The diver...

1994
J. L. Cortés

The non-relativistic quantum field theoretic lagrangian which describes an anyon system in the presence of an electromagnetic field is identified. A non-minimal magnetic coupling to the Chern-Simons statistical field as well as to the electromagnetic field together with a direct coupling between both fields are the non trivial ingredients of the lagrangian obtained from the non relativistic lim...

Journal: :Biochemical and biophysical research communications 2005
Rainer Girgert Hartmut Schimming Wolfgang Körner Carsten Gründker Volker Hanf

The incidence of breast cancer in western societies has been rising ever since the Second World War. Besides the exposure to a multitude of new chemical compounds, electromagnetic field exposure has been linked to breast cancer through a radiation-mediated anti-melatonin pathway. We investigated, whether low-frequency electromagnetic field exposure interferes with the anti-estrogenic activity o...

1993
István Rácz

Abstrac: We consider source-free electromagnetic fields in spacetimes possessing a non-null Killing vector field, ξ. We assume further that the electromagnetic field tensor, Fab, is invariant under the action of the isometry group induced by ξ. It is proved that whenever the two potentials associated with the electromagnetic field are functionally independent the entire content of Maxwell’s equ...

Journal: :iranian journal of medical physics 0
seyed mohammad firoozabadi associated professor, medical physics dept., tarbiat modares university, tehran, iran. majid jadidi assistant professor, medical physics dept., semnan university of medical sciences, semnan, iran. ali rashidy-pour professor, physiology research center, semnan university of medical sciences, semnan, iran. bahram bolouri associated professor, medical physics dept., iran university of medical sciences, tehran, iran. yaghoob fathollahi professor, physiology dept., tarbiat modares university, tehran, iran. gholamreza mohammadi assistant professor, semnan university of medical sciences, semnan, iran.

introduction: over the last decade, exposure to electromagnetic waves due to base station antennas has increased. this study was planned to evaluate the effects of different electrical field strengths with 950 mhz waves of the gsm mobile phone system on the excitatory postsynaptic potentiation (epsp) slope of the dentate gyrus long-term potentiation (ltp). material and methods: twenty four naiv...

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