نتایج جستجو برای: way time of electromagnetic wave

تعداد نتایج: 21318959  

2006
W. Struyve H. Westman

We present a way to construct a pilot-wave model for quantum field theory. The idea is to introduce beables corresponding only to the bosonic degrees of freedom and not to the fermionic degrees of freedom of the quantum state. We illustrate this idea for quantum elec-trodynamics. The beables will be field beables corresponding to the electromagnetic field and they will be introduced in a simila...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه علوم پایه دامغان 1389

in this thesis, ‎‎using‎‎ ‎concept‎s‎ ‎of‎ ‎wavelet‎s‎ ‎theory ‎‎‎som‎e‎ ‎methods‎‎ ‎of‎ ‎th‎e ‎solving‎‎ ‎optimal‎‎ ‎‎con‎tr‎ol‎ problems ‎(ocps)‎‎. ‎g‎overned by time-delay systems is investigated. ‎th‎is‎ thesis contains ‎tw‎o parts. ‎‎first, the method of obtaining ‎o‎f ‎the‎ ‎‎ocps‎ in time delay systems by linear legendre multiwavelets is ‎ ‎presented‎.‎‎‎‎ the main advantage of the meth...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه رازی - دانشکده علوم 1388

abstract sensitive and precise voltammetric methods for the determination of trace amounts of furaldehydes, mainly as furfural (f) and 5-hydroxymethyl-2-furaldehyde (hmf), in waste waters and other matrices is described. determination of total furaldehyde at < ?g g-1 levels in alkaline buffered aqueous media was individually investigated. by the use of ordinary swv and adsorptive square wave ...

Journal: :journal of paramedical sciences 0
seyed mohammad mahdavi department of biology, science and research branch, islamic azad university, tehran, iran. mostafa rezaei-tavirani proteomics research center ,shahid beheshti university of medical sciences, tehran, iran. abdolrahim nikzamir faculty of medicine, shahid beheshti university of medical sciences, tehran, iran. abdolreza ardeshirylajimi department of stem cell biology, stem cell technology research center, tehran, iran.

due to the increasing presence of electromagnetic radiation in advanced societies, investigation of the effects of this radiation on humans has attracted the interest of many researchers. the non- ionizing radiation can induce numerous effects through biomolecules in the tissue and cells. in the current study, effects of 12 hz electromagnetic waves investigated on neuronal hormone levels in rat...

F. Namazi, F. Soleimani, G.A. Jelodar, M. Azimzadeh,

Background: Exposure to electromagnetic radiation may impair memory. This study was conducted to evaluate the effect of radiofrequency wave (hereafter referred to as RFW) on passive avoidance learning and memory in healthy males and females. Materials and Methods: Ten adult male and ten female Sprague-Dawley rats (230±20 gr) were randomly divided into four groups including two control groups (o...

Journal: :iranian journal of medical physics 0
seyed ali saiedi zadeh ms.c. in occupational hygiene , tehran university of medical sciences, tehran, iran parvin nassiri professor, occupational health dept., tehran university of medical sciences, tehran, iran hojjat zeraati assistant professor, epidemiology and biostatistics dept.,tehran university of medical sciences, tehran, iran rahmatollah jahangiri assistant professor, school of medicine, army university of medical sciences, tehran, iran

introduction: it has been reported that cardiovascular effects are among the possible health effects of being exposed to extremely low frequency electromagnetic fields (elf emss). material and methods: this study has been conducted to evaluate the long term effects of exposure to magnetic and electric fields on electrocardiogram signal changes. nine power transmission posts having different vol...

پایان نامه :0 1374

in fact this study is concerned with the relationship between the variation in thematice structure and the comprehension of spoken language. so the study focused on the following questions: 1. is there any relationship between thematic structure and the comprehension of spoken language? 2. which of the themes would have greated thematic force and be easier for the subjects to comprehend? accord...

2010
F. Mustafa A. M. Hashim

Strong interests are recently emerging for development of solid-state devices operating in the so-called “terahertz gap” region for possible application in radio astronomy, industry and defense. To fill the THz gap by using conventional electron approach or transit time devices seems to be very difficult due to the limitation that comes from the carrier transit time where extremely small featur...

جمشیدی, مینا, حکیمی‌پژوه, حسین, درویش‌ملا, سحر, روحانی, محمودرضا, چابک‌سوار, مرجان,

 Propagation of Electromagnetic wave in a plasma in the equilibrium state can cause instability. Investigating the situations in which this kind of instability occurs and grows is an important issue. In this paper, Raman instability in plasma is analyzed by particle simulation method. In terms of physical investigation, plasma is a very complicated environment and experimentally too expensive. ...

2017
Francisco Javier Ferrández Pastor Juan Manuel García Chamizo Mario Nieto-Hidalgo

Electromagnetic radiation is energy that interacts with matter. The interaction process is of great importance to the sensing applications that characterize material media. Parameters like constant dielectric represent matter characteristics and they are identified using emission, interaction and reception of electromagnetic radiation in adapted environmental conditions. How the electromagnetic...

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