نتایج جستجو برای: mobile phone base stations
تعداد نتایج: 507958 فیلتر نتایج به سال:
The rapid development of cellular communication systems all over the world has caused the appearance of many hundreds of mobile telephone base stations in every city. Installation of base station antennas has produced concerns about health and in some cases has resulted in litigation in court. Independent researches and measurements on electromagnetic fields in areas close to base stations was ...
The presented survey was conducted in six European countries as an online study. A total of 2454 subjects participated. Two main research questions were investigated: firstly, how does the cognitive, moral, and affective framing of radio frequency electromagnetic field (RF EMF) exposure perception influence RF EMF risk perception? Secondly, can the deployment of mobile phone base stations have ...
Mobile phone use and wireless communication technology have grown explosively over the past decades. This rapid growth has caused widespread global concern about the potential detrimental effects of this technology on human health. Stem cells generate specialized cell types of the tissue in which they reside through normal differentiation pathways. Considering the undeniable importance of stem ...
Background : The rapid development of communication and mobile use has generated discussions about changing people's life and their dependence on cell phones. Dependence to mobile phone creates a sense of loneliness and unsuitable social support. This study aimed to determine the relationship between cell phone use and loneliness and social support scores in Tehran University of Medical Scien...
Present status and perspective of GaN-based technology in Japan have been presented. An AlGaN/GaN HEMT is expanding its application field from L to W bands and it will replace the Si and GaAs based power amplifiers used in mobile phone base stations, terrestrial/satellite microwave communication systems, and collision avoidance car radar systems. A GaN-based rectifier diode will be used in AC/D...
The evolution of mobile communications, during the last decades, has led to a rapid increase in the number of users that mobile operators have to serve. To cope with this increase, mobile operators increment the number of base stations they are using resulting in an escalation of the corresponding energy footprint. This is why; the reduction of the total energy that is consumed from base statio...
There is widespread public concern about the potential adverse health effects of mobile phones in general and their associated base stations in particular. This study was designed to investigate the acute effects of radio frequency (RF) electromagnetic fields (EMF) emitted by the Universal Mobile Telecommunication System (UMTS) mobile phone base stations on human cognitive function and symptoms...
Previous terrorist attacks, system failures and natural disasters have revealed the problems that many States face in preparing for national civil contingencies. The diversity of critical infrastructures and the interconnections between different systems makes it difficult for planners to ‘think of everything’. For example, the loss of power distribution networks can disrupt rail and road trans...
introduction: the mobile phone is viewed as an important communication tool and has become an integral part of the iranian society and they are increasingly using the mobile phone rather than the fixed line telephone as a way to keep in touch with their family, friends, colleagues and business associates. today, mobile phones are equipped with other features that allow further communication and...
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