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  • 1
    Electronic Resource
    Electronic Resource
    Need for well-balanced education in software engineering measurement (1992)
    Springer
    Software quality journal 1 (1992), S. 81-100 
    Details
    ISSN: 1573-1367
    Keywords: education ; measurement ; metrics ; models ; goal oriented approach ; data collection ; data analysis ; measurement programme
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Notes: Abstract This paper deals with a perceived need for a well-balanced education (or in some cases re-education) in the subject of software engineering measurement, more commonly although less accurately known as software metrics. This need was confirmed by a major survey of both industry and academia conducted in 1989. Software metrics have received a lot of bad press in the past, mainly due to some much criticized early work in so-called complexity metrics. A result of this has been scepticism or lack of interest in other areas of the wider subject of software engineering measurement, which covers not only models and measures applicable to software products, but also those applicable to the processes and resources involved in software production. The ideas and work described in this paper have arisen out of the ESPRIT project ‘METKIT’, which has produced educational material about software engineering measurement for use in both industry and academia. This paper also describes the material designed for academia, most of which has now been tested in 12 European academic institutions. The material concentrates on principles and examples rather than prescribing the use of particular models and measures. This material has been widely publicized; the response to it has been encouraging so far and it appears that the material will have a significant impact towards getting the subject taught much more widely, and in a more balanced way.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01845741
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    Paper (German National Licenses)
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  • 2
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    Multi-use lunar telescopes (1992)
    In:  Other Sources
    Details
    Publication Date: 2011-08-24
    Description: The objective of multi-use telescopes is to reduce the initial and operational costs of space telescopes to the point where a fair number of telescopes, a dozen or so, would be affordable. The basic approach is to develop a common telescope, control system, and power and communications subsystem that can be used with a wide variety of instrument payloads, i.e., imaging CCD cameras, photometers, spectrographs, etc. By having such a multi-use and multi-user telescope, a common practice for earth-based telescopes, development cost can be shared across many telescopes, and the telescopes can be produced in economical batches.
    Keywords: ASTRONOMY
    Type: In: Robotic telescopes in the 1990s; Proceedings of the Symposium, 103rd Annual Meeting of the Astronomical Society of the Pacific, Univ. of Wyoming, Laramie, June 22-24, 1991, 1991 (A93-36457 14-89); p. 289-303.
    Format: text
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  • 3
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    The use of robotic telescopes for detecting planetary systems (1992)
    In:  Other Sources
    Details
    Publication Date: 2011-08-24
    Description: It is argued that increases in the precision of photometric measurements and the development of fully automatic photometric telescopes (APTs) now make possible the detection of Jupiter-size objects around other stars. The two most promising approaches are to monitor binary stars that have their orbital plane nearly in our line of sight and to measure the rotation periods of stars that are known to have dark companions and have very accurate values for Vsini. Differential photometry with APTs, based on a rapid comparison among a group of stars, provides a precision of 2 parts in 1000. Transits of solar-type stars by planets or brown dwarfs the size of Jupiter or Saturn will produce brightness variations of about 10 parts per 1000.
    Keywords: ASTRONOMY
    Type: In: Robotic telescopes in the 1990s; Proceedings of the Symposium, 103rd Annual Meeting of the Astronomical Society of the Pacific, Univ. of Wyoming, Laramie, June 22-24, 1991, 1991 (A93-36457 14-89); p. 153-169.
    Format: text
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  • 4
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    New 1982-1990 photometry of Lambda Andromedae and its 11-year cycle (1991)
    In:  Other Sources
    Details
    Publication Date: 2019-07-12
    Description: The paper presents photoelectric photometry of Lambda And never before published, obtained between February 1982 and December 1990 at 29 different observatories. Then it is combined with all other photometry available (previously published, contained in the I.A.U. Commission 27 Archives, and obtained with the Vanderbilt 16-inch automatic telescope but not yet published), to yield a 14.8-year data base. Analysis reveals a long-term cycle in mean brightness, with a full range of 0.15 m and a period of 11.4 +/- 0.4 years. Because most of the new photometry was concentrated in the 1983-1984 observing season, this one well-defined light curve is analyzed with a two-spot model. Spot A keeps a 0.04 m amplitude throughout four rotation cycles whereas the amplitude of spot B diminishes from 0.09 m down almost to 0.03 m. The spot rotation periods were 55.9 d +/- 0.6 d and 52.8 d +/- 1.0 d, respectively.
    Keywords: ASTRONOMY
    Type: Journal of Astrophysics and Astronomy (ISSN 0250-6335); 12; 4 De
    Format: text
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  • 5
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    Precise automatic differential stellar photometry (1991)
    In:  Other Sources
    Details
    Publication Date: 2019-07-12
    Description: The factors limiting the precision of differential stellar photometry are reviewed. Errors due to variable atmospheric extinction can be reduced to below 0.001 mag at good sites by utilizing the speed of robotic telescopes. Existing photometric systems produce aliasing errors, which are several millimagnitudes in general but may be reduced to about a millimagnitude in special circumstances. Conventional differential photometry neglects several other important effects, which are discussed in detail. If all of these are properly handled, it appears possible to do differential photometry of variable stars with an overall precision of 0.001 mag with ground based robotic telescopes.
    Keywords: ASTRONOMY
    Type: Astronomical Society of the Pacific, Publications (ISSN 0004-6280); 103; 221-242
    Format: text
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