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101.
Browning RC Kurtz RN Kerherve H 《Sports biomechanics / International Society of Biomechanics in Sports》2012,11(1):73-84
Snowshoeing is a popular form of winter recreation due to the development of lightweight snowshoes that provide flotation, traction, and stability. The purpose of this study was to determine the effects of snowshoes on lower extremity kinematics during level walking. Twelve adults (6 males, 6 females, body mass = 67.5 +/- 10.7kg) completed six 3-minute level walking trials. Subjects walked overground without snowshoes and on packed snow using conventional and flexible tail snowshoes. We placed lightweight inertial/gyroscopic sensors on the sacrum, thigh, shank, and foot. We recorded sensor orientation and calculated hip, knee, and ankle joint angles and angular velocities. Compared to level overground walking, subjects had greater hip and knee flexion during stance and greater hip flexion during swing while snowshoeing. Ankle plantarflexion began during late swing when snowshoeing vs. heel strike during overground walking. Lower extremity kinematics were similar across snowshoe frame designs during level walking. Our results show that snowshoeing on packed snow results in a more flexed leg compared to overground walking and may reflect a strategy to limit the effects of walking with an extended heel. 相似文献
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Raymond E. Webster J. Barry Hewitt H. Marchelle Crumbacker 《Psychology in the schools》1989,26(3):243-248
The validity of most psychological and educational tests is established using correlational procedures examining the linear relationship between performance on the two instruments. Concurrent validity developed in this manner is commonly viewed as verification of the acceptability of a test. Few studies exist examining the degree to which test performance covaries with real-life performance appraisals. This study examined the concurrent validity of the WRAT-R and the K-TEA with teacher estimates of actual classroom levels of performance in reading and mathematics. Participants were 134 third and fourth graders enrolled in a regular education setting. In addition, this study compared the test performance of average students on two widely used standardized educational achievement tests in order to determine whether the tests yielded significantly different performance estimates relative to grade level functioning. 相似文献
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Raymond Daudel 《Higher Education in Europe》1995,20(4):192-194
The role and functions of the European Academy of Sciences, Arts, and Letters, the oldest (1979) of the three European international academies, are described. Working with UNESCO, it is helping to establish a network of Academies of the Mediterranean Countries. It is also co‐operating with the Institut de France in the setting up of the Academy‐Third World Project. By working through the international academies, the national academies increase their participation in international activities. 相似文献
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