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IEEE Potentials

Issue 4 • Date Oct/Nov 1999

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Displaying Results 1 - 7 of 7
  • Looking back: KDKA [radio station]

    Publication Year: 1999, Page(s):40 - 42
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (324 KB)

    At 8:00 p.m., 2 November 1920, KDKA of East Pittsburgh, Pennsylvania began broadcasting the Harding-Cox presidential election returns. With a power output of 100 watts, the transmitter's signals reached homes several hundred miles from the world's first commercial radio station. Its great success led its owner, the Westinghouse Electric and Manufacturing Company, to increase its power output by 10... View full abstract»

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  • Mapping out switching techniques

    Publication Year: 1999, Page(s):37 - 39
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (364 KB)

    Several techniques can be used to minimize Boolean functions; some are more useful than others. This article deals with a computer program designed for two such techniques: the Karnaugh map and Quine-McCluskey (1952). The program demonstrates 24 switching variables. It provides a visual representation of the Karnaugh map technique for the user who wishes it. The second technique, Quine-McCluskey, ... View full abstract»

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  • Field programmable gate arrays

    Publication Year: 1999, Page(s):34 - 36
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (424 KB)

    Field programmable gate arrays (FPGAs) are a flexible alternative to custom integrated circuits. They can implement both combinatorial and sequential logic of tens of thousands of gates. Historically, software has been considered “flexible” with hardware its rigid counterpart in system design. All this changed with the shift in the approach to computing: a re-programmable gate array. T... View full abstract»

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  • Shopping for job takers [distributed scheduler agent]

    Publication Year: 1999, Page(s):13 - 16
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (444 KB)

    Workstations interconnected by a high-speed network can extend the processing power available to an individual far beyond a single workstation. However, a distributed scheduler agent is required to exploit these computational resources. The distributed scheduler provides task placement advice to distributed and parallel applications. This enables the job at hand to be dispatched to a remote host f... View full abstract»

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  • An impedance-modulated-reflector system

    Publication Year: 1999, Page(s):29 - 33
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (496 KB)

    A radar signal reflected front a target (e.g., aircraft) has the same time variation as the incident signal. (This is aside from whatever Doppler shift is caused by aircraft motion.) But if the reflecting target has a time-varying reflectivity, the reflected signal will have that time variation encoded on it. This phenomenon permits communication between two (or more) points while having a radio-f... View full abstract»

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  • Blind channel equalization

    Publication Year: 1999, Page(s):9 - 12
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (492 KB)

    Signals that pass through a channel undergo various forms of distortion. One very common type of distortion is intersymbol interference, or ISI. ISI is caused by interference from the symbols that were transmitted before and after the given symbol. ISI-induced errors can cause the receiver to misinterpret the received samples. The equalizer is an important part of a modern digital communications r... View full abstract»

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  • Storing magnetic data

    Publication Year: 1999, Page(s):17 - 20
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (544 KB)

    Magnetic recording data storage innovation and product evolution is arguably higher than it has ever been. For example, the current record in high density recording is 23.8 Gbit/in2, which was demonstrated by Seagate Technology. Data is stored by creating a pattern of magnetization in the media using a recording head. Basically, the head is a split ring-shaped core of easily magnetized ... 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