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Spectrum, IEEE

Issue 7 • Date July 1968

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Displaying Results 1 - 25 of 47
  • [Front cover]

    Publication Year: 1968 , Page(s): c1
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  • [Advertisement]

    Publication Year: 1968 , Page(s): nil1
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  • Table of contents

    Publication Year: 1968 , Page(s): 1 - 2
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  • [Advertisement]

    Publication Year: 1968 , Page(s): 3
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  • The Institute of Electrical and Electronics Engineers, Inc.

    Publication Year: 1968 , Page(s): 4
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  • [Breaker page]

    Publication Year: 1968 , Page(s): 4
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  • High-Sensitivity Infrared 10.6-Micron Heterodyne Receivers with Large IF Bandwidth Part II: Receiver Development

    Publication Year: 1968 , Page(s): 5
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    First Page of the Article
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  • [Advertisement]

    Publication Year: 1968 , Page(s): 6
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  • IEEE spectrum

    Publication Year: 1968 , Page(s): 6
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  • [Advertisement]

    Publication Year: 1968 , Page(s): 7
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  • Microbridges for electrons

    Publication Year: 1968 , Page(s): 8
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  • Transients and trends

    Publication Year: 1968 , Page(s): 9
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  • News of the IEEE

    Publication Year: 1968 , Page(s): 10 - 28
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  • [Advertisement]

    Publication Year: 1968 , Page(s): 11 - 30
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  • Calendar

    Publication Year: 1968 , Page(s): 31 - 32
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  • [Advertisement]

    Publication Year: 1968 , Page(s): 33
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  • People

    Publication Year: 1968 , Page(s): 34 - 39
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  • [Advertisement]

    Publication Year: 1968 , Page(s): 35 - 40
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  • Obituaries

    Publication Year: 1968 , Page(s): 39
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  • Spectral lines

    Publication Year: 1968 , Page(s): 41
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  • Authors

    Publication Year: 1968 , Page(s): 42 - 43
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  • Men, machines, and languages

    Publication Year: 1968 , Page(s): 44 - 49
    Cited by:  Papers (3)
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    Men communicate with each other by natural language and with machines by computer language. Building a bridge between these forms of communication has proved difficult, possibly because of misunderstandings about the nature and use of each kind of language. This article points out that until people succeed in storing in a computer considerable areas of human experience, they are not likely to make a computer interact usefully with natural language. View full abstract»

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  • Railroad electrification: past, present, and future History of systems in the United States

    Publication Year: 1968 , Page(s): 50 - 65
    Cited by:  Papers (1)
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    Although early efforts to propel railway vehicles by primitive batteries date back as far as 1835, the first successful application of electric traction probably occurred in 1879, when a locomotive designed by Dr. Werner von Siemens was operated at an exhibition in Berlin. This priority may be in some dispute, however, since Thomas Edison experimented with an electric locomotive at about the same date, and Steven D. Field was also testing such a device at this point in time. George Westinghouse, the genius of American railways, was another pioneer in this developmental effort. The story of railway electrification is one of epic proportions both in the United States and elsewhere. The first installment of this three-part series is concerned with the historical development of electric railway systems in the United States up to the present time. The second chapter will discuss the advent of the diesel locomotives and their impact upon electrification, automatic signal and safety features, and the present and future prospects for the electrification of proposed rapid transit systems. The final installment will deal with the development of the European systems. View full abstract»

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  • Spacecraft infrared imaging Systems engineering aspects

    Publication Year: 1968 , Page(s): 66 - 74
    Cited by:  Papers (1)
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    The first part of this article, which appeared in the June issue, described the nature of infrared scanners and the results of some satellite IR experiments. In this concluding installment, the parametric relationships between the scanner and the spacecraft are set forth. The suborbital velocity/altitude ratio is fixed for a satellite in a circular orbit. Thus, such parameters as coverage, resolution, and scan rate can be expressed in terms of altitude. Since the signal-to-noise ratio of the sensor output is also a function of many of these same parameters, an evaluation of the IR system performance can be made. Equations are developed for relating the sensor, the mission, and the spacecraft in terms of an overall IR system. View full abstract»

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  • [Advertisement]

    Publication Year: 1968 , Page(s): 75 - 78
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IEEE Spectrum Magazine, the flagship publication of the IEEE, explores the development, applications and implications of new technologies.

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