Volume 6 Issue 4 • April 1969

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Displaying Results 1 - 25 of 44
  • [Front cover]

    Publication Year: 1969, Page(s): c1
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  • [Advertisement]

    Publication Year: 1969, Page(s): nil1
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  • Spectrum Reader Service Card

    Publication Year: 1969, Page(s):1a - 1b
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  • [Advertisement]

    Publication Year: 1969, Page(s): 1
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  • Table of contents

    Publication Year: 1969, Page(s):2 - 3
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  • The Institute of Electrical and Electronics Engineers, Inc.

    Publication Year: 1969, Page(s): 4
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  • [Breaker page]

    Publication Year: 1969, Page(s): 4
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  • Video Probability Distributions

    Publication Year: 1969, Page(s): 5
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  • Technological Advances Reflected in New Wiley-Interscience Books [advertisement]

    Publication Year: 1969, Page(s):6 - 7
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  • Forum

    Publication Year: 1969, Page(s):8 - 9
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  • Focal points

    Publication Year: 1969, Page(s):10 - 18
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  • [Advertisement]

    Publication Year: 1969, Page(s):11 - 20
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  • Transients and trends

    Publication Year: 1969, Page(s): 12
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  • Calendar

    Publication Year: 1969, Page(s):21 - 22
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  • [Advertisement]

    Publication Year: 1969, Page(s):23 - 24
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  • Spectral lines

    Publication Year: 1969, Page(s): 25
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  • Electricity and weather modification I. A survey of scientific relationships

    Publication Year: 1969, Page(s):26 - 45
    Cited by:  Papers (2)
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    Ethereal, evanescent, elusive-these are adjectives a poet might use to describe the fragile stuff of clouds. They are accurate, and evocative, but still another adjective-electrified-may prove to be more important in the years immediately ahead. Workers in the fields of atmospheric electricity and cloud physics have accumulated sufficient evidence to suggest that electric fields, forces, and charg... View full abstract»

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  • Pumped storageߞthe handmaiden of nuclear power

    Publication Year: 1969, Page(s):46 - 52
    Cited by:  Papers (3)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (3327 KB)

    The power companies of the New England states, where fossil-fuel cost is high, have determined that low-variable-cost nuclear generation is desirable for this region. The construction of pumped-storage hydro plants, favored by the topography of the area, will offset the relatively high fixed costs of nuclear plants by maximizing the capacity-use factor of the nuclear facilities and thereby minimiz... View full abstract»

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  • The crystal resonator- a digital transducer

    Publication Year: 1969, Page(s):53 - 58
    Cited by:  Papers (32)  |  Patents (3)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (4866 KB)

    Precision piezoelectric quartz resonators have evolved during a half century of research, development, and engineering. It is an evolution that started with rudimentary concepts and a precision of one part in a thousand, and emerged today with a precision of a few parts in 1012. Although there have been significant steps forward through single contributions, the evolution has been a continuous imp... View full abstract»

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  • Art and technology I. Steps toward a new synergism

    Publication Year: 1969, Page(s):59 - 68
    Cited by:  Papers (3)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (10677 KB)

    Many artists today, especially those in the younger generation, are looking to modern technology as a new medium in which to delve, and they are looking, as well, for engineers to assist them and to collaborate with them on their works. This two-part article describes certain aspects of the art-and-technology movement, and speculates on some of its possible consequences. Part I traces the roots of... View full abstract»

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  • The early history of electronics III. Prehistory of radiotelegraphy

    Publication Year: 1969, Page(s):69 - 74
    Cited by:  Papers (1)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (4292 KB)

    Before radiotelegraphy could become a reality, it had to he thought of; a workable detector of electromagnetic waves had to be discovered; and the results obtained by Hertz had to be disseminated to a wider audience. In earlier installments in this series, we saw how the work of Hertz and his predecessors had led an electrical engineer to ask whether waves could not be used for the transmission of... View full abstract»

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  • [Advertisement]

    Publication Year: 1969, Page(s):75 - 78
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  • How to extend sampling-oscilloscope versatility

    Publication Year: 1969, Page(s):79 - 85
    Cited by:  Papers (1)  |  Patents (1)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (5181 KB)

    A recently developed sampling-oscilloscope system consists of some 20 different kinds of units-some plug-ins, some self-contained instruments-which can be used together in literally hundreds of functional configurations. However, rather than giving detailed descriptions of these units, this article approaches the subject by discussing five specific applications in which this measurement system off... View full abstract»

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  • Operation GIT a success

    Publication Year: 1969, Page(s): 86
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  • Convolution revisited

    Publication Year: 1969, Page(s):87 - 93
    Cited by:  Papers (5)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (3246 KB)

    Few mathematical operations are more important to the engineer than convolution and transform analysis. In this article, the operation of convolution is explored-starting with discrete rather than continuous convolution because of the relative ease of comprehension involved. With this foundation, the study is extended to continuous convolution. A proof of the convolution theorem will show that con... View full abstract»

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