排序方式： 共有19条查询结果，搜索用时 15 毫秒
1.
清代中期顾禄所著《清嘉录》，是记录当时江苏岁时习俗的重要书籍。论文作者通过参阅大量文献考证了《清嘉录》的著述年代及顾禄的生年。 相似文献
2.
当今日本新闻业的实用主义 总被引：1，自引：0，他引：1
当今日本的新闻业看上去充满了民主之风,实际上却出现了一些问题,原因在于日本政府的政策和媒体自身。文章分析了日本新闻业和政治的相互关系,揭示了日本新闻业实用主义风潮的本质,对新闻业唯政治马首是瞻的情况进行了批评并分析了问题产生的原因和目前的解决措施。 相似文献
3.
Miyamoto N Wakahara T Sugisaki N Murata K Kanehisa H Fukunaga T Kawakami Y 《Journal of sports sciences》2010,28(14):1535-1542
The aim of the present study was to examine elbow joint extension power-load characteristics with and without a countermovement. Eight male participants performed maximal elbow extensions with and without a countermovement against different loads (0, 2.5, 5.0, 7.5, 10.0, 12.5, and 15.0 kg). Electromyographic activity of the lateral and long heads of the triceps brachii and the biceps brachii muscles was recorded. The average joint power in the concentric phase was significantly enhanced in the countermovement condition at all loads except for 0 kg. The optimal load for the maximal joint power was greater in the countermovement (7.5 kg) than in the no countermovement condition (5.0 kg). Electromyographic activity was unchanged over the intensities and conditions. Our results suggest that the optimal load for the maximal joint power depends on the type of action (i.e. with or without a counter-movement), and that the enhanced joint power in the countermovement condition is due primarily to the storage and utilization of elastic energy. 相似文献
4.
5.
Leble V Lima R Dias R Fernandes C Ishikawa T Imai Y Yamaguchi T 《Biomicrofluidics》2011,5(4):44120-4412015
In microcirculation, red blood cells (RBCs) flowing through bifurcations may deform considerably due to combination of different phenomena that happen at the micro-scale level, such as: attraction effect, high shear, and extensional stress, all of which may influence the rheological properties and flow behavior of blood. Thus, it is important to investigate in detail the behavior of blood flow occurring at both bifurcations and confluences. In the present paper, by using a micro-PTV system, we investigated the variations of velocity profiles of two working fluids flowing through diverging and converging bifurcations, human red blood cells suspended in dextran 40 with about 14% of hematocrit level (14 Hct) and pure water seeded with fluorescent trace particles. All the measurements were performed in the center plane of rectangular microchannels using a constant flow rate of about 3.0 × 10−12 m3/s. Moreover, the experimental data was compared with numerical results obtained for Newtonian incompressible fluid. The behavior of RBCs was asymmetric at the divergent and convergent side of the geometry, whereas the velocities of tracer particles suspended in pure water were symmetric and well described by numerical simulation. The formation of a red cell-depleted zone immediately downstream of the apex of the converging bifurcation was observed and its effect on velocity profiles of RBCs flow has been investigated. Conversely, a cell-depleted region was not formed around the apex of the diverging bifurcation and as a result the adhesion of RBCs to the wall surface was enhanced in this region. 相似文献
6.
This study examined the effects of social support, job autonomy, and job satisfaction on burnout among long-term care workers in Hawaii, USA. Data were collected from 170 care workers working at long-term care facilities in Hawaii. The study variables included demographic data, burnout, social support, job autonomy, and job satisfaction. The study findings support the association between social support, job autonomy, job satisfaction, and burnout among care workers at long-term care facilities. Social support, job autonomy, and job satisfaction were negatively and significantly associated with the level of burnout of care workers in Hawaii. Furthermore, the findings suggest the need to develop policy and practice considerations for reducing burnout risks among care workers in order to improve quality of care. 相似文献
7.
Koichiro Misawa 《Journal of Philosophy of Education》2011,45(4):689-702
This article examines the benefits and burdens of the debate between Paul Hirst and Wilfred Carr over a set of issues to do with philosophy and education specifically and theory and practice more generally. Hirst and Carr, in different ways, emphasise the importance of Aristotelian practical philosophy as an antidote to the theory‐oriented confined method of ‘conceptual analysis’ that has haunted the philosophy of education. Despite their proper recognition of the irreducible character of practice to theory, they fail to provide a satisfying account of their interpenetrating relation. Hirst falls into error by fencing off ‘forms of theoretical knowledge’ from ‘forms of practice’; Carr's dismissive attitude to theory is saturated with internal tensions in his own discourse. This article contends that what is left unaddressed both in Hirst's and Carr's arguments is the most fundamental sense of ‘social’, which is prior to relative differences in the standards of knowledge among societies and which reminds us that theory is not a socially disembodied enterprise. A lively appreciation of this point encourages us to see the prevailing outlook towards the relation between philosophy and education quite differently. 相似文献
8.
Koichiro Inoue Hiroyuki Nunome Thorsten Sterzing Hironari Shinkai Yasuo Ikegami 《Journal of sports sciences》2013,31(11):1023-1032
AbstractWe aimed to illustrate support leg dynamics during instep kicking to evaluate the role of the support leg action in performance. Twelve male soccer players performed maximal instep kicks. Their motions and ground reaction forces were recorded by a motion capture system and a force platform. Moments and angular velocities of the support leg and pelvis were computed using inverse dynamics. In most joints of the support leg, the moments were not associated with or counteracting the joint motions except for the knee joint. It can be interpreted that the initial knee flexion motion counteracting the extension joint moment has a role to attenuate the shock of landing and the following knee extension motion associated with the extension joint moment indirectly contributes to accelerate the swing of kicking leg. Also, appreciable horizontal rotation of the pelvis coincided with increase of the interaction moment due to the hip joint reaction force on the support leg side. It can be assumed that the interaction moment was the main factor causing the pelvis counter-clockwise rotation within the horizontal plane from the overhead view that precedes a proximal-to-distal sequence of segmental action of the swing leg. 相似文献
9.
Kohei Watanabe Hiroyuki Nunome Koichiro Inoue Takahiro Iga Hiroshi Akima 《Sports biomechanics / International Society of Biomechanics in Sports》2020,19(3):295-306
ABSTRACTA possible link between soccer-specific injuries, such as groin pain and the action of hip adductor muscles has been suggested. This study aimed to investigate neuromuscular activation of the adductor magnus (AM) and longus (AL) muscles during instep and side-foot soccer kicks. Eight university soccer players performed the two types of kick at 50%, 75% and 100% of the maximal ball speed. Surface electromyography (EMG) was recorded from the AM, AL, vastus lateralis (VL) and biceps femoris (BF) muscles of both kicking and supporting legs and the kicking motions were three-dimensionally captured. In the kicking leg, an increase in surface EMG with an increase in ball speed during instep kicking was noted in the AM muscle (p < 0.016), but not in AL, VL or BF muscles (p > 0.016). In the supporting leg, surface EMG of both AM and AL muscles was significantly increased with an increase in the ball speed before ball impact during both instep and side-foot kicks (p < 0.016). These results suggest that hip adductor muscles markedly contribute to either the kicking or supporting leg to emphasise the action of soccer kicks. 相似文献
10.
Factors such as errors during the fabrication or construction of structural components and errors of calculation assumption or calculation methods, are very likely to cause serious deviation of many strings＇ actual prestressing forces from the designed values during tension structure construction or service period, and further to threaten the safety and reliability of the structure. Aiming at relatively large errors of the prestressing force of strings in a tension structure construction or service period, this paper proposes a new finite element method （FEM）, the ＂tensile force correction calculation method＂. Based on the measured prestressing forces of the strings, this new method applies the structure from the zero prestressing force status approach to the measured prestressing force status for the first phase, and from the measured prestressing force status approach to the designed prestressing force status for the second phase. The construction tensile force correction value for each string can be obtained by multi-iteration with FEM. Using the results of calculation, the strings＇ tensile force correction by group and in batch will be methodic, simple and accurate. This new calculation method can be applied to the prestressed correction construction simulation analysis for tension structures. 相似文献