نتایج جستجو برای: gsm mobile phone base stations

تعداد نتایج: 510422  

Journal: :Journal of Geography, Environment and Earth Science International 2023

Global System for Mobile Communications (GSM) started operations in Nigeria on the 16th of May, 2001. An important feature communication system is Base Transceiver Stations (BTS). However, their installations have brought about public concerns and fears, specifically to issues relating environmental risk, health sometimes construction problems that might result mast collapse. This study aimed a...

2015
Christoforos Ntantogian Grigoris Valtas Nikos Kapetanakis Faidon Lalagiannis Georgios Karopoulos Christos Xenakis

With the emergence of widely available hardware and software tools for GSM hacking, the security of cellular networks is threatened even by script kiddies. In this paper we present four different attacks in GSM networks, using commodity hardware as well as open source and freely available software tools. All attacks are performed using a common DVB-T TV tuner, which is used as a sniffer for the...

1998
Charles Shields Vikas Jain Simeon C. Ntafos Ravi Prakash S. Venkatesan

Rapidly deployable wireless networks consist of mobile base stations and less powerful mobile hosts. The mobile base stations have to maintain wireless connectivity while on the move along pre-de ned paths. Physical obstructions and wireless range limitations may prevent a pair of mobile base stations from establishing a wireless link. We study situations of distance-constrained mobility, and f...

Journal: :Environmental Research 2021

The effects of radiofrequency exposure on the health people living near mobile-phone base stations (MPBSs) have been subject several studies since mid-2000s, with contradictory results. We aimed to investigate association between measured electromagnetic fields (RF-EMF) from MPBSs and presence self-reported non-specific insomnia-like symptoms. A cross-sectional survey conducted 2015 2017 in fiv...

Journal: :razavi international journal of medicine 0
jahanshir tavakolizadeh department of basic medical sciences, faculty of medicine, gonabad university of medical sciences, gonabad, ir iran alireza atarodi department of basic medical sciences, faculty of medicine, gonabad university of medical sciences, gonabad, ir iran; department of basic medical sciences, faculty of medicine, gonabad university of medical sciences, gonabad, ir iran. tel: +98-5337223028, fax: +98-5337223814 siravan ahmadpour gonabad university of medical sciences, gonabad, ir iran amir pourgheisar gonabad university of medical sciences, gonabad, ir iran

results the prevalence of excessive mobile phone use was 36.7% on the students. there was a significant relation between the prevalence of excessive mobile phone use and mental health status in general (p > 0.05), and also somatization (p < 0.05), anxiety and depression specifically (p < 0.05), but no significant relation was found between the excessive mobile phone use and social dysfunction (...

2000
Scott B. Guthery Roger Kehr Joachim Posegga

We describe the WebSIM, an approach that integrates GSM SIMs into the Internet. The underlying idea is to implement a Web Server inside a SIM, and to allow for transparent access to it from the Internet. The contribution of our approach is that a SIM, which is currently a security module (smart card) fitted in a GSM mobile phone, becomes also a personal security server in the Internet. Like any...

2016
Jakob Belschner Daniel de Abreu Joachim Habermann Veselin Rakocevic

Pico base stations are an important instrument to increase the capacity of mobile radio networks. Due to the limited spectrum availability it will be necessary to operate macro and pico base stations on the same frequency bands. In this case the transmit power imbalance between different base station types creates new interference situations. Coordinated beamforming is one method of base statio...

2015
Abdul Aziz Khan

This paper describes, to monitor the signals of ECG, body temperature, heart rate are measured and given to ARM controller. Through GSM/GPRS modem updated parameters are sending directly to the doctor’s mobile phone/nearby hospital web portal doctor can also query about the human health through GSM by SMS. In addition to that if elderly people need to operate any electrical devices, can help th...

2003
Per-Bjarne Bro Narciso Cerpa Samuel Ortega-Farías

This paper describes an application of real time data capture and wireless transmission of meteorological data used by agricultural administrators to support operational decisions such as irrigation scheduling and pesticide application. Forestry companies need such information for managing operations during the fire season. The system architecture based on distributed wireless data communicatio...

ژورنال: سلامت و محیط زیست 2014
بازرگانی, اعظم, محوی, امیرحسین, منظم, محمدرضا, یونسیان, مسعود,

Background and objectives: In recent decades, progress of telecommunication industry resulted in public availability to cost-effective cellular mobile hence, boom of base stations of cellular mobile in response to vast public demands. Base stations of cellular mobile are specific source of microwave production in a certain frequency in environment. Antennas are installed on high towers to creat...

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