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Notices     
Kinanthropometry III. Proceedings of the VIII Commonwealth and International Conference on Sport, Physical Education, Dance, Recreation and Health. T. Reilly, J. Watkins and J. Borms (eds), E. &; F.N. Spon, London, 1986, xii + 312 pp, £25 (hb), ISBN 0 419 13970 2

Sensible fitness. J.H. Wilmore, Human Kinetics, Champaign, Illinois, USA, 1986, xii + 300 pp, $11.95, ISBN 0 88011 270 0

Running without fear. K.H. Cooper, Bantam Books, London, 1985, 256 pp, £3.95, ISBN 0 553 17356 1

Athletic training and sports medicine. American Academy of Orthopaedic Surgeons, Churchill Livingstone, Chicago, USA, 1986. viii + 602 pp, £40, ISBN 0 89203 002 X

Athletics and the heart. R. Rost, Year Book Medical Publishers Inc., Chicago, 1987, vii+159 pp, £21.50 (pb), ISBN 0 8151 7397 0

Psychology and sociology of sport: current selected research, Volume 1. L.V. Velden and J.M. Humprey (eds), AMS Press, New York, 1986, ix + 237 pp, £49.50 (hb), ISBN 0 404 63401 X  相似文献   
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There are many adults who left school without A levels who wish to further their education as mature students. Because many of these adults are being accepted by colleges without traditional A levels, and with very few GCSE/O level subject passes, it has been suggested that their acceptance as students may lower the standard of the college courses. This paper evaluates the qualities which mature and non‐traditional entry students bring to college courses, and concludes that their results compare favourably with those of traditional entry students. Many mature students appear to have needs in common with other students and meeting these needs would result in better practice within institutions of higher education (HE). However, mature students also have specific needs which are evaluated in this paper. Most require little additional expenditure, but are rather a matter of will and organisation on the part of the institution and tutors. Entry as mature students onto BEd courses seems to be particularly attractive to women but some of them experience difficulty in finding employment. The data collected demonstrate that maturity is likely to be a positive attribute and the mature applicant for a post to be a ‘quality product’.  相似文献   
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Asymmetric self-excited periodic motions or periodic solutions which are produced by relay feedback systems that have symmetric characteristics are studied in the paper. Two different mechanisms of producing an asymmetric oscillation by a system with symmetric properties are noted and analyzed by the locus of a perturbed relay system (LPRS) method. Bifurcation between the ability to excite symmetric and asymmetric oscillation with variation of system parameters is analyzed. An algorithm of finding asymmetric solutions is proposed.  相似文献   
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