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41.
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Michel-Pellegrino V Hwqaon D Hogrel JY Duchêne J 《Journal of aging and physical activity》2008,16(2):171-187
The aim of this study was to analyze differences in biomechanical parameters between elderly and control participants when stepping up, to evaluate control of balance. Eleven control and 14 elderly participants performed a step from an initial static posture onto a 7-cm-high force plate. For the spontaneous-velocity condition, elderly participants performed a slower progression velocity than control participants. Elderly participants spent proportionally more time in stance phase, with a corresponding decrease in swing phase, than the control participants, irrespective of movement velocity. In contrast, at spontaneous velocity the parameters related to ground-reaction force (GRF) showed that anteroposterior and mediolateral forces at toe-off of the support limb and the slope of vertical force during weight transfer were significantly smaller for the elderly than for control participants. These GRF parameters depended on the stepping-up velocity. The elderly develop a spatiotemporal strategy and reduced movement velocity to control support balance. 相似文献
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Domantas Jasilionis France Meslé Vladimir M. Shkolnikov Jacques Vallin 《Revue europeenne de demographie》2011,27(4):403-431
Until the end of the 1990s, mortality patterns and trends in Estonia, Latvia and Lithuania were remarkably similar. However,
from the year 2000 onwards, life expectancy trends in the three countries started to diverge. In particular, sustainable progress
in Estonia over the period 2000–2007 contrasts with stagnation in Latvia, and even worsening trends in Lithuania. These contradictory
changes seem to be mainly explained by contrasting dynamics in mortality from cardiovascular diseases, external causes of
death and digestive system diseases. Whereas cardiovascular and external-cause mortality declined in Estonia and Latvia, worsening
or stagnation of mortality from these causes of death was observed in Lithuania. The negative mortality changes in Lithuania
were also reinforced by a striking increase in mortality from alcohol-related digestive system diseases. The findings suggest
that the divergence in health trends between the three countries may be attributable to their varying degrees of success in
implementing structural health care reforms and specific health policy measures. By contrast, the very recent improvement
(since 2008) is parallel in the three countries and is largely because of the introduction of rather similar anti-alcohol
measures. 相似文献
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Jacques Silber 《Statistical Papers》1989,30(1):231-238
A new measure is developed for the distance between relative price vectors. It is shown to be related to Gini’s Index of Concentration and is applied to cross-country data for the year 1975. 相似文献
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Jacques Tibau 《European Management Journal》2000,18(6)
The author draws on his experience teaching business concepts to executive students from former centrally-planned economies of the Confederation of Independent States, particularly Tashkent. Several lessons can be learned. Most important is that the students' perceptions of Western business knowledge is very different from those in the West. To bridge these different perceptions, the author suggests starting from a common knowledge base, using only concrete and specific work situations, making tacit knowledge explicit through imagination, analogies and metaphors, and giving priority to the process of introducing new business practices. 相似文献
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