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Potentials, IEEE

Issue 2 • Date April 1993

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Displaying Results 1 - 6 of 6
  • Something new in power technology

    Publication Year: 1993 , Page(s): 40 - 42
    Cited by:  Papers (3)  |  Patents (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (322 KB)  

    The use of compressed-air energy storage (CAES), in which off-peak electricity is used to compress air and store it in a cavern underground, is described. To supply electricity during peak load, the compressed air is released to a combuster where it mixes with oil or gas. The operation of the 110-MW McIntosh plant of the Alabama Electric Cooperative is explained. The fact that three-fourths of the area of the US contains potential sites for CAES power plants, together with the excellent performance of the McIntosh plant, makes CAES a leading candidate for energy storage in the future.<> View full abstract»

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  • Electromagnetic fields and health

    Publication Year: 1993 , Page(s): 34 - 39
    Cited by:  Papers (3)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (709 KB)  

    The author examines the controversy over the effects of human exposure to electromagnetic fields, particularly the magnetic field at power line-frequencies (60 Hz in North America, 50 Hz in Europe and some other places). She discusses typical exposures and describes some epidemiological studies and laboratory experiments. It is pointed out that, overall, the existing evidence is not convincing that the fields are harmful to people. The mechanism by which fields interact with animals, including humans, is explained. Medical applications of fields are described, and the contribution that engineers can make to research on both applications and harmful effects of fields is noted.<> View full abstract»

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  • The human factor

    Publication Year: 1993
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (137 KB)  

    Fourteen guidelines geared to human factors engineering for improved product designs are presented. These rules and the ideas they represent were excerpted and adapted from the author's book 'A Guide to Achieving Career Success' (1991, IEEE Press).<> View full abstract»

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  • Spread-spectrum communications

    Publication Year: 1993 , Page(s): 13 - 16
    Cited by:  Patents (9)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (383 KB)  

    The characteristics of spread-spectrum systems that account for their growing use are examined. They offer low probability of intercept, signal hiding, and jammer rejection. Spread spectrum also provides a measure of immunity to multipath interference and multiple access capability, making it ideal for radar, telephone, local area networks, and many other applications. The two primary techniques commonly used frequency hopping and direct sequence, are described along with their advantages and disadvantages.<> View full abstract»

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  • Why fast packet switching?

    Publication Year: 1993 , Page(s): 10 - 12
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (300 KB)  

    Asynchronous transfer mode (ATM), selected for broadband integrated services digital networks and receiving much standardization activity, is discussed. ATM is a packet switching technique with minimal functionality in the network and hence is often called fast packet switching. In transmission, statistical multiplexing replaces the time-division multiplexing of the synchronous transfer mode. The operation of ATM switches is described.<> View full abstract»

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  • The IRIDIUM communications system

    Publication Year: 1993 , Page(s): 6 - 9
    Cited by:  Papers (15)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (427 KB)  

    A description is given of the IRIDIUM communication system, so-called because the system design originally consisted of 77 networked satellites, and the element iridium has the atomic number 77. The goal is to make instant global communications a reality. The system design now consists of 60 satellites, a system control facility, gateways, and subscriber units. Each of these components is examined.<> View full abstract»

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Aims & Scope

IEEE Potentials is the magazine dedicated to undergraduate and graduate students and young professionals.

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Meet Our Editors

Editor-in-Chief
David Tian
Carnegie Mellon University
david.tian@ieee.org