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IEEE Potentials

Issue 2 • Date April 1994

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Displaying Results 1 - 8 of 8
  • Atomic clock accuracy needed

    Publication Year: 1994, Page(s):8 - 10
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (452 KB)

    The National Institute of Standards and Technology (NIST), formerly The National Bureau of Standards, has been working with atomic clocks for over forty years. They have come a long way since they developed the world's first atomic clock. NIST has also introduced NIST-7, one of the most accurate clocks to date and is expected, after full evaluation, to show an accuracy of one part in 10/sup 14/, e... View full abstract»

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  • GPS, atomic clocks and relativity

    Publication Year: 1994, Page(s):11 - 15
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (769 KB)

    Discusses position determination of the user, atomic clocks in satellites, special relativity, Lorentz transformation, length contraction, time dilation, Doppler effect, and aging of the Navstar clocks.<> View full abstract»

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  • Voltage collapse

    Publication Year: 1994, Page(s):18 - 21
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (806 KB)

    Voltage collapse is characterised by a loss of control of the voltage levels in a power system. Although all of the precise mechanisms that affect voltage collapse have not yet been identified, voltage instabilities are known to occur when the power system is operating under a stressed state. The authors discuss voltage collapse and its relationship with the point of maximum power transfer and how... View full abstract»

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  • Electric and magnetic fields

    Publication Year: 1994, Page(s):22 - 25
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (765 KB)

    Increasing electrification brings increased human exposures to electric and magnetic fields, commonly called EMFs, and growing evidence suggests that exposure to even low frequency, low energy, electric and magnetic fields may be related to adverse health effects. This paper focuses on magnetic fields and strategies that address them. The challenges faced by scientists in understanding magnetic fi... View full abstract»

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  • PMUs [phasor measurement unit]

    Publication Year: 1994, Page(s):26 - 28
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (578 KB)

    In the spring of 1993, a major new 500 kV transmission line was put in service in Northern California. Test engineers initiated a series of artificial short-circuit faults to test the line installation. As an experiment, the steady-state and transient responses of the power system were recorded. During testing of the new California-Oregon Transmission Project (COTP), a PMU was installed at Olinda ... View full abstract»

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  • Quality electric power

    Publication Year: 1994, Page(s):29 - 32
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (726 KB)

    The author discusses an electricity supply problem in a hospital to introduce the concept of power quality. The term power quality describes how an electric power system and the loads connected to it work together. The author discusses the kind of disturbances to a power system that affect power quality and the measures that can be taken to improve the quality of the power delivered. Another examp... View full abstract»

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  • Programming with objects

    Publication Year: 1994, Page(s):34 - 36
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (429 KB)

    The primary question about object programming is "How is it better than traditional programming methods?" The following answers are typically given: increased productivity, more code reuse, better management of complexity, and encouragement of a healthy programming style. However these advantages may not be evident until one understands the philosophy behind an object. Furthermore, when trying to ... View full abstract»

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  • The object is integration

    Publication Year: 1994, Page(s):37 - 40
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (528 KB)

    The new thing in the computer programming arena is object-oriented programming (OOP). OOP distinguishes itself from conventional programming in three important ways: encapsulation, inheritance and polymorphism. Encapsulation describes the organization of both code and data into powerful units called objects. This organization, a natural extension of a data-structure, creates an implicit relationsh... View full abstract»

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

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Editor-in-Chief
Sachin Seth
Texas Instruments
sachin3006@gmail.com