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BEHAVIOUR OF ELECTROMAGNETIC WAVES IN DIFFERENT MEDIA AND STRUCTURE_2

Tham khảo sách 'behaviour of electromagnetic waves in different media and structure_2', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 11 Exposing to EMF Mahmoud Moghavvemi1 Farhang Alijani1 Hossein Ameri Mahabadi1 and Maryam Ashayer Soltani2 1Department of Electrical Engineering University of Malaya UM 2Department of Bioprocess Engineering Universiti Teknologi Malaysia UTM Malaysia 1. Introduction 1.1 Electromagnetic Field Radiation In the recent years by developing the usage of new popular Electronic-Communication gadgets and home appliances like Mobile Phones and Microwave Ovens which are mostly sources of Electromagnetic Wave Radiation a severe public concern regarding the sideeffects whether positive or negative on human health and environment has been arisen. It means that there are new challenging issues rather than old one the exposing to low radiofrequency emissions which have been studied for past decades. Indeed for more than 100 years human has exposed to the Radio-waves radiation from Radio TV broadcasting transmitters besides the Radar and point to point V UHF microwave links. However due to the low power density of those high frequency emissions which were far enough the only low frequency was considered as main and important subject of EMF to human. To set the limitations on all types of EMF Radiations the International Non-Ionizing Radiation Committee INIRC in cooperation with World Health Organization WHO had started their activities for 4 decades. Their first report to United Nations Environment Program UNEP has been approved in 1977. Later in 1992 to professionally study and investigate the detriments of Non-Ionized radiation and its effects on environment INIRC changed to International Commission on Non-Ionizing Radiation Protection ICNIRP. In spite of world activities that have been done so far it can be easily understood that all kinds of EMF radiations which we regularly use in industry and or in our personal life has become a vital part that we cannot ignore. Therefore sometimes we expect and also suffer from and its side effects. 1 In the following sections the different