نتایج جستجو برای: electromagnetic oscillation

تعداد نتایج: 114330  

2004
Leun J. Otten Michael D. Rugg

Our ability to feel, think, and act can in some way be attributed to the workings of the brain. For over a century, scientists have used measures of brain activity to gain insights into perceptual, cognitive, and motor functions. As a result, researchers have developed a variety of methods to measure brain activity noninvasively (e.g., Rugg, 1999). These methods roughly fall into two classes: '...

Journal: :Saudi medical journal 2008
Ahmed Y Rezk Khaled Abdulqawi Randa M Mustafa Tark M Abo El-Azm Hesham Al-Inany

OBJECTIVE To study fetal and neonatal heart rate (HR) and cardiac output (COP), following acute maternal exposure to electromagnetic fields (EMF) emitted by mobile phones. METHODS The present study was carried out at Benha University Hospital and El-Shorouq Hospital, Cairo, Egypt, from October 2003 to March 2004. Ninety women with uncomplicated pregnancies aged 18-33 years, and 30 full term h...

1999
Emil Jovanov

Consciousness, as a complex phenomenon, arises on a hierarchy of human rhythms and their interaction with environment. We present here a model of consciousness represented as a parallel distributed multiprocessing system with rhythmic scanning within a set of active modules. Dominant "gestalt" activity is then created by global exchange of information on "system bus" and by means of common elec...

2013
Ramesh Mani R. G. Mani A. N. Ramanayaka Tianyu Ye

Terahertz photovoltaic detection of cyclotron resonance in the regime of radiation-induced magnetoresistance oscillations Report Title We examine and compare the diagonal magnetoresistance, R-xx, and the photovoltage induced by microwave (42 <= f <= 300 GHz) and terahertz (f >= 300 GHz) photoexcitation in the high mobility quasi-two-dimensional GaAs/AlGaAs system. The data demonstrate strong ra...

Journal: :Physical review 2023

We investigate the scalar, gravitational, and electromagnetic quasinormal mode spectra of Schwarzschild anti-de Sitter black holes using numerical continued fraction method. The have similar, almost linear structures. With a few exceptions, low overtone modes are consistent with previously obtained results in literature that use other techniques. intermediate high modes, comparison to case, con...

, حیات غیبی, حسین, زارع, صمد, علی وندی, ساناز,

Developing technology and industry and increasing application of electromagnetic fields in medicine, threaten the environment and human health. Biological effects of these fields depend on the field magnitude and physical characteristics of exposed tissue. In order to research the effects of electromagnetic fields on kidney tissue on electromagnetic field generator was made with intensities of ...

Ai, Jafar, Farmani, Ahmad Reza , Mohammad Salehi, Maedeh,

The term "electromagnetic fields" (EMF) is a combination of electric and magnetic fields as a diagnostic method as well as a therapeutic tool with many advantages such as ease of operation and painlessness, very controllable, which today has found wide application in regenerative medicine and also cancer treatment.  In addition to organs such as nerves, hearts, and bones that have an electrica...

Journal: :international journal of advanced biological and biomedical research 2013
namrata agrawal anita jatav p.k singhal

this paper presents an approach to modeling of field penetration and gives contribution to understanding the real effects of the fields and the sensitivity of human model to electromagnetic radiation generated by mobile antenna. when a human body is exposed to the electromagnetic radiation, because human body contain 70% of liquid, and it contain more liquid near of head, heart, abdomen (near o...

Journal: :iranian journal of veterinary science and technology 0
katayoon nofouzi najmeh sheikhzadeh davood mohamad-zadeh jassur javad ashrafi helan amir ali shahbazfar amir tukmechi

for many years it was believed that extremely lowfrequency electromagnetic field (elf-emf) do not have any significant biological effects. in this study, the influence of extremely low-frequency electromagnetic fields on the growth performance, serum antioxidant power and gastrointestinal structure of rainbow trout were evaluated. rainbow trout (17-18 g) were exposed to electromagnetic fields (...

Journal: :مجله دانشگاه علوم پزشکی شهید صدوقی یزد 0
سعیده کریمی s karimi مهناز طاهریانفرد m taherianfard امین ا... بهاءالدینی a bahaoddini مهدی فاضلی m fazeli

introduction: the aim of the present study is to investigate the effect of interaperitoneal injection of baclofen (gaba-b agonist) and cgp35348 (gaba-b antagonist) on serum testosterone concentration in aggressive rats exposed to electromagnetic field. methods: fifty five mature male rats weighing 200±20 grams were studied. animals were divided into 2 main groups and four subgroups. main groups...

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