نتایج جستجو برای: gsm mobile phone base stations

تعداد نتایج: 510422  

Journal: :Occupational and environmental medicine 2006
H-P Hutter H Moshammer P Wallner M Kundi

BACKGROUND The erection of mobile telephone base stations in inhabited areas has raised concerns about possible health effects caused by emitted microwaves. METHODS In a cross-sectional study of randomly selected inhabitants living in urban and rural areas for more than one year near to 10 selected base stations, 365 subjects were investigated. Several cognitive tests were performed, and well...

Journal: :International journal of radiation biology 2010
Dimitris J Panagopoulos Evangelia D Chavdoula Lukas H Margaritis

PURPOSE To examine the bioactivity of GSM 900 and 1800 (Global System for Mobile Telecommunications) radiations, in relation to the distance from the antenna or to the radiation-field intensities. MATERIALS AND METHODS Drosophila melanogaster adult insects were exposed to the radiation of a GSM 900/1800 mobile phone antenna at different distances ranging from 0 to 100 cm, and the effect on th...

2007
Igor S. Simić

Abstract With the proliferation of wireless standards such as GSM/EGPRS, WLAN, WiMAX, WCDMA, HSDPA/HSUPA, and WiBRO — future wireless radio base stations will need to support multiple air-interfaces, frequency bands and modulation formats. Radio technology that enables reconfigurable hardware across multiple standards is a big challenge for base station developers. In this paper base station ar...

Journal: :International journal of advanced research 2021

Nepal Telecommunication (NTC) and Ncell are the two main telecom players in at moment. has been primarily focused on offering Global System for Mobile (GSM) mobile lines, while NTC offers all types of phone services. Although remains countrys leading provider total subscribers, recently overtook as GSM lines. This study aims to assess customer satisfaction highly competitive Nepalese industries...

Journal: :Bioelectromagnetics 2009
Ki Chang Nam Ju Hyung Lee Hyung Wook Noh Eun Jong Cha Nam Hyun Kim Deok Won Kim

With the number of cellular phone users rapidly increasing, there is a considerable amount of public concern regarding the effects that electromagnetic fields (EMFs) from cellular phones have on health. People with self-attributed electromagnetic hypersensitivity (EHS) complain of subjective symptoms such as headaches, insomnia, and memory loss, and attribute these symptoms to radio frequency (...

Journal: :International Journal of Advanced Research in Electrical, Electronics and Instrumentation Engineering 2014

Journal: :Mutation research 2010
Evangelia D Chavdoula Dimitris J Panagopoulos Lukas H Margaritis

In the present study we used a 6-min daily exposure of dipteran flies, Drosophila melanogaster, to GSM-900MHz (Global System for Mobile Telecommunications) mobile phone electromagnetic radiation (EMR), to compare the effects between the continuous and four different intermittent exposures of 6min total duration, and also to test whether intermittent exposure provides any cumulative effects on t...

Journal: :تحقیقات نظام سلامت 0
مریم عمیدی مظاهری استادیار، آموزش بهداشت، دانشگاه علوم پزشکی اصفهان، اصفهان، ایران مجتبی کرباسی مربی، زبان انگلیسی، دانشگاه علوم پزشکی اصفهان، اصفهان، ایران محمدشهرام محتشمی کارشناس مسؤول بهداشت محیط، مرکز بهداشت شماره 1، اصفهان، ایران

background: mobile phone has become extremely popular and widely used all over the world. now a day, consumers around the world can purchase a single product that utility as a mobile phone, camera, camcorder, calculator, game console, text-messaging device, mp3 player, alarm clock, web browser and email device. the purpose of the present study was to explore self-reported use of various feature...

Journal: :International Journal of Applied Mathematics, Electronics and Computers 2023

Today, smart phones based on different mobile communication technologies such as GSM, GPRS/EDGE, 3G, 4G, 5G and 6G have become an indispensable element for various services communication, entertainment, banking. In this context, determining the base station power level is important in terms of limit values public health, especially places with high density. study, electromagnetic density 31 sta...

Journal: :Biomedical and environmental sciences : BES 2010
Christoph Augner Gerhard W Hacker Gerd Oberfeld Matthias Florian Wolfgang Hitzl Jörg Hutter Gernot Pauser

OBJECTIVE The present study aimed to test whether exposure to radiofrequency electromagnetic fields (RF-EMF) emitted by mobile phone base stations may have effects on salivary alpha-amylase, immunoglobulin A (IgA), and cortisol levels. METHODS Fifty seven participants were randomly allocated to one of three different experimental scenarios (22 participants to scenario 1, 26 to scenario 2, and...

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