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Proceedings of the IEEE

Issue 1 • Jan. 1980

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Displaying Results 1 - 25 of 45
  • [Front cover and table of contents]

    Publication Year: 1980, Page(s): c1
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    Freely Available from IEEE
  • Godfrey Newbold Hounsfield, nobel laureate

    Publication Year: 1980, Page(s): 3
    Cited by:  Papers (1)
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  • Scanning the issue

    Publication Year: 1980, Page(s):4 - 5
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  • Population exposure to VHF and UHF broadcast radiation in the united states

    Publication Year: 1980, Page(s):6 - 12
    Cited by:  Papers (33)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (704 KB)

    The U.S. Environmental Protection Agency (EPA) has been collecting broadcast signal field intensity data for over three years to estimate population exposure to this form of nonionizing radiation. Measurement data have been obtained at 486 locations distributed throughout 15 large cities and collectively represent approximately 14 000 measurements of VHF and UHF signal field intensities. The VHF a... View full abstract»

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  • Occupational exposure to radio-frequency electromagnetic fields

    Publication Year: 1980, Page(s):12 - 17
    Cited by:  Papers (20)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2108 KB)

    Occupational exposure to radio-frequency (RF) electro-magnetic (EM) fields occurs in various industrial processes. The exposure usually takes place in the near field, i.e., within one free space wavelength from the RF source. When a survey of a workplace is performed from a leakage radiation point of view, the near-field situation implies that the electric as well as the magnetic field strengths h... View full abstract»

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  • Measurement of electric- and magnetic-field strengths from industrial radio-frequency (6-38 MHz) plastic sealers

    Publication Year: 1980, Page(s):17 - 20
    Cited by:  Papers (26)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (472 KB)

    This paper describes the results of occupational radio-frequency (RF) field strength measurements on RF plastic sealers and compares the results to the ANSI C95.1-1974 personnel exposure standard. The RF sealers are characterized according to operating frequency, duty cycle, and nominal power output. The field strength monitors used in these measurements were constructed and calibrated for near-fi... View full abstract»

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  • Electromagnetic radiation from selected telecommunications systems

    Publication Year: 1980, Page(s):21 - 24
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (405 KB)

    Because of the growing interest in potential health effects associated with exposure to electromagnetic (EM) radiation at microwave and radio frequencies (RF's), a study was initiated within the Bell System to document existing levels of EM energy associated with various radio transmission systems. To this end, power density and electric field strength measurements were made at selected facilities... View full abstract»

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  • State of the knowledge for electromagnetic absorbed dose in man and animals

    Publication Year: 1980, Page(s):24 - 32
    Cited by:  Papers (72)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (694 KB)

    The paper gives the EM absorbed dose for man and animals at various frequencies for the plane wave irradiation condition for different orientations of the body relative to incident fields. Also included are the results for the whole-body absorption for conditions of electrical contact with ground and in the presence of reflecting surfaces of high conductivity and multiple animals. The data are giv... View full abstract»

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  • Electromagnetic dosimetry for models of humans and animals: A review of theoretical and numerical techniques

    Publication Year: 1980, Page(s):33 - 40
    Cited by:  Papers (73)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (918 KB)

    Theoretical dosimetry, i.e., calculation of the electromagnetic (EM) energy absorbed by humans in radiation fields, has become increasingly important as the use of EM devices in our society has increased. Since such calculations are difficult and complicated, a number of EM analysis techniques have been used by researchers in the field to obtain dosimetric data and understanding of absorption char... View full abstract»

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  • Microwave biological effects: An overview

    Publication Year: 1980, Page(s):40 - 49
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1299 KB)

    Although most investigators accept the fact that "high power density" of microwaves can result in pathophysiological manifestations of a thermal nature, some reports have suggested that "low power density" microwave (MW) energy can affect neural and immunologic function in animals and man. Most of these reports have emanated from the USSR and other Eastern European countries. Since most reported "... View full abstract»

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  • Microwave cataractogenesis

    Publication Year: 1980, Page(s):49 - 55
    Cited by:  Papers (19)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (932 KB)

    Experimental investigations of microwave cataractogenesis, as well as the application of theoretical methods, suggest the involvement of thermal damage. Time-intensity cataract thresholds for acute exposures of rabbits indicate dose reciprocity. The induction of lens opacification following repeated exposure at intensities below the threshold for single-dose exposures suggests a cumulative compone... View full abstract»

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  • Mammalian teratogenesis and radio-frequency fields

    Publication Year: 1980, Page(s):56 - 60
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (657 KB)

    Evidence of teratogenesis after exposure to radio-frequency (RF) electromagnetic (EM) fields has been sought in investigations of several species. This review summarizes reports of teratogenic effects in mammals. Investigations performed on the laboratory mouse and rat have revealed that exposure to intense RF fields can result in reduced body mass, in specific anatomical abnormalities (especially... View full abstract»

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  • Microwave irradiation and the blood-brain barrier

    Publication Year: 1980, Page(s):60 - 67
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1060 KB)

    The mammalian blood-brain barrier (BBB) is an anatomically and physiologically defined system that is believed to play a role in regulating the fluid environment of the brain. Earlier reports of altered BBB function in small animals after brief exposure to weak microwave fields (30 to 1000 µW/cm2, averaged) are reviewed in the light of more recently reported studies that have gener... View full abstract»

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  • The microwave auditory phenomenon

    Publication Year: 1980, Page(s):67 - 73
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (758 KB)

    When human subjects are exposed to rectangular pulses of microwave radiation, an audible sound occurs which appears to originate from within or behind the head. It has been shown that electrophysiological auditory activity may be elicited by exposing the brains of laboratory animals to rectangular pulses of microwave energy. These results suggest that a microwave auditory phenomenon is evoked by a... View full abstract»

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  • Advances in microwave-induced neuroendocrine effects: The concept of stress

    Publication Year: 1980, Page(s):73 - 77
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (668 KB)

    Recent evidence indicates that neuroendocrine effects are induced by microwave exposure with a threshold intensity required for the onset of the response. The level of that threshold is dependent upon intensity and duration of exposure. The threshold can vary with the given endocrine parameter studied. The level of that threshold is yet unclear due to conflicting reports of effect in chronic or re... View full abstract»

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  • Epidemiologic studies of microwave effects

    Publication Year: 1980, Page(s):78 - 84
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (875 KB)

    This is a selective review of human epidemiologic studies and related information concerning biologic and health effects of microwave radiation. Following a description of the objectives and methods of epidemiology, the approach to microwave effects is considered and two recent but not yet published studies are described, namely, a study of U.S. naval personnel occupationally exposed to radar, and... View full abstract»

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  • Soviet and eastern european research on biological effects of microwave radiation

    Publication Year: 1980, Page(s):84 - 91
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (928 KB)

    A large amount of literature on the biological effects of microwave radiation has been obtained from the Soviet Union and other Eastern European countries since 1973. This literature reports changes in almost all biological systems at exposure power densities less than 10 mW/cm2. Since 1976 an increased amount of data using long-term microwave exposures at power density levels below 10 ... View full abstract»

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  • Study of effects of long-term low-level RF exposure on rats: A plan

    Publication Year: 1980, Page(s):92 - 97
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1490 KB)

    The study is designed to simulate the chronic exposure of man to 450-MHz radio-frequency (RF) radiation at an incident power density of 1 mW/cm2. This paper presents a plan for conducting a lifetime exposure study involving two phases of work. The first phase, up to March 1980, is being spent in preparation for the chronic study. During the second phase, 200 rats, 100 experimental and 1... View full abstract»

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  • Biological effects of electric and magnetic fields associated with ELF communications systems

    Publication Year: 1980, Page(s):98 - 104
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (891 KB)

    The U.S. Navy has proposed a submarine communications system that operates at extremely low frequencies (ELF). The land-based transmitting antenna for this system consists of insulated conductors 50 to 100 km long, grounded at each end, and driven by a generator such that the flow of current would be along the cable, into the ground, deep in the earth, and return to the other grounded end of the c... View full abstract»

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  • RF-field interactions with biological systems: Electrical properties and biophysical mechanisms

    Publication Year: 1980, Page(s):104 - 113
    Cited by:  Papers (196)  |  Patents (14)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1019 KB)

    Electrical properties of tissues, macromolecular solutions, and cell membranes are summarized at frequencies from the extra low frequency (ELF) to microwave range. Previously presented dielectric data are supplemented by new results and a more detailed discussion of the physical mechanisms for the observed temperature coefficients of the dielectric properties. The dielectric data are discussed in ... View full abstract»

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  • Cellular effects: Millimeter waves and Raman spectra—Report of a panel discussion

    Publication Year: 1980, Page(s):114 - 119
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (746 KB)

    On June 22, 1979, a panel discussion was held at the Bioelectromagnetics Symposium in Seattle, WA. In this report, we summarize the statements of the panel members and comment on several common suggestions. We also include written abstracts which correspond to the oral presentations of most of the panel members. View full abstract»

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  • Frequency and power windowing in tissue interactions with weak electromagnetic fields

    Publication Year: 1980, Page(s):119 - 125
    Cited by:  Papers (92)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (786 KB)

    Effects of nonionizing electromagnetic (EM) fields that raise tissue temperature in general differ very little from effects of hyperthermia induced by other means. However, fields raising tissue temperature orders of magnitude less than 0.1°C may result in major physiological changes not attributable to raised temperature per se. These weak fields have been observed to produce chemical, physi... View full abstract»

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  • Electromagnetic techniques for medical diagnosis: A review

    Publication Year: 1980, Page(s):126 - 132
    Cited by:  Papers (33)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1226 KB)

    In this paper, potential electromagnetic (EM) methods for medical diagnosis are reviewed. These include impedance plethysmography, microwave methods for lung water measurements, EM flowmeters, and microwave radiometry diagnostic techniques. Other techniques that are in preliminary research stages, such as EM imaging and use of microwave Doppler radar to monitor arterial wall movements, are briefly... View full abstract»

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  • Physical hyperthermia and cancer therapy

    Publication Year: 1980, Page(s):133 - 142
    Cited by:  Papers (51)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1219 KB)

    In general, malignant cells are more sensitive to heat than are normal cells in the range of 41-45°C. In addition, most clinically apparent tumors (above 1-cm diameter) have blood perfusion rates less than 1/5 that of surrounding normal tissue, meaning that they may be preferentially heated. Hyperthermic treatment may be local (tumor only), regional (e.g., a limb), or whole body. Physical tec... View full abstract»

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  • Implantable radiators for cancer therapy by microwave hyperthermia

    Publication Year: 1980, Page(s):142 - 149
    Cited by:  Papers (23)  |  Patents (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2207 KB)

    The treatment of cancer by the combined effects of heat and radiation or chemotherapy is a promising procedure which has attracted wide interest. Microwave radiation is one of the most useful techniques for creating thermal fields in tissue but its use is limited by the rapid attenuation of microwaves in propagation through the body. Consequently, the design of microwave radiators which can be hyp... View full abstract»

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H. Joel Trussell
North Carolina State University