A Case Study of “Planetary Landscapes: Sculpting the Solar System”     

Mark St. John  Dawn Huntwork 《Curator: The Museum Journal》2005,48(3):281-300

This article presents a case study of the design, development and evaluation of a science museum exhibition called Planetary Landscapes: Sculpting the Solar System. The exhibition was created by Chabot Space and Science Center in Oakland, California, in collaboration with the artist Ned Kahn. (A slightly smaller version has been traveling to science museums around the country, and has been sent to the Middle East and Asia.) This exhibition affords a chance to explore the work of a gifted artist as he seeks to merge art and science and create beautiful inquiry‐based exhibits. The story also relates how a museum design team and an evaluation team sought to support the exhibition design in ways that would augment and not interfere with the expertise of the artist.  相似文献   

Biomechanical comparison of the double-push technique and the conventional skate skiing technique in cross-country sprint skiing   总被引：1，自引：0，他引：1  

Stöggl T  Müller E  Lindinger S 《Journal of sports sciences》2008,26(11):1225-1233

The aims of the study were to: (1) adapt the "double-push" technique from inline skating to cross-country skiing; (2) compare this new skiing technique with the conventional skate skiing cross-country technique; and (3) test the hypothesis that the double-push technique improves skiing speed in a short sprint. 13 elite skiers performed maximum-speed sprints over 100 m using the double-push skate skiing technique and using the conventional "V2" skate skiing technique. Pole and plantar forces, knee angle, cycle characteristics, and electromyography of nine lower body muscles were analysed. We found that the double-push technique could be successfully transferred to cross-country skiing, and that this new technique is faster than the conventional skate skiing technique. The double-push technique was 2.9 +/- 2.2% faster (P < 0.001), which corresponds to a time advantage of 0.41 +/- 0.31 s over 100 m. The double-push technique had a longer cycle length and a lower cycle rate, and it was characterized by higher muscle activity, higher knee extension amplitudes and velocities, and higher peak foot forces, especially in the first phase of the push-off. Also, the foot was more loaded laterally in the double-push technique than in the conventional skate skiing technique.  相似文献   

Biomechanical validation of a specific upper body training and testing drill in cross-country skiing   总被引：1，自引：0，他引：1  

Stöggl T  Lindinger S  Müller E 《Sports biomechanics / International Society of Biomechanics in Sports》2006,5(1):23-46

The aim of this study was to perform a biomechanical validation of a double poling imitation drill on a rollerboard. Six elite cross-country skiers performed three imitation drill trials at maximal speed at 13 degrees inclination and in double poling on roller skis on a paved road of 3 degrees. Pole and strap forces, elbow and hip angles and EMG activity of eight upper body muscles were measured. Force curves showed similar characteristics, except for impact force occurring only at pole plant in double poling on roller skis. Double poling on a rollerboard includes an eccentric roll-down phase not appearing in double polling on roller skis. Forces on the rollerboard were similar to those on roller skis. Courses of the elbow angles indicated similar shapes, except for the angle at the start of the propulsion phase and, consequently, during flexion (p < 0.01). Propulsion time and cycle duration were longer and frequency lower on the rollerboard (all p < 0.001). Muscle activities were not significantly different, except for stronger biceps brachii (p < 0.01) and weaker erector spinae activation (p < 0.05) on the rollerboard. Muscle coordination patterns showed similar onset and offset points of each muscle and comparable activations in both activities, except for biceps brachii. Two movement strategies on the rollerboard were found, which led to small differences in measured variables. The biomechanical validity of double poling on a rollerboard can be judged as moderately high, being aware of the differences in some variables that might be considered in training sessions on the rollerboard, particularly when using intervals with high number of repetitions.  相似文献   

Copyright corner     

John St Aubyn 《Learned Publishing》1988,1(2):82-83

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Copyright corner     

John St Aubyn 《Learned Publishing》1991,4(4):236-237

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Photocopying licensing up to date     

John St Aubyn 《Learned Publishing》1991,4(1):43-44

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Copyright theft by John Gurnsey Aslib Gower 1995 224pp £28.50 ISBN 0–566–07631–4     

John St Aubyn 《Learned Publishing》1995,8(4):261-262

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Learned journal publishing and fees to authors     

John St Aubyn 《Learned Publishing》1992,5(1):34-35

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Publishing agreements—a book of precedents (third edition), edited by Charles Clark. London: Unwin Hyman Ltd. 1988. 238 pp. £20.00. ISBN 0–04–440237–6.     

John St Aubyn 《Learned Publishing》1989,2(3):159-159

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Beyond Pygmalion: Developments and Directions in Teacher Expectations Research     

Alison St. George 《Asia-Pacific Journal of Teacher Education》1982,10(2):41-49

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