Longitudinal change in throwing performance: gender differences     

K R Nelson  J R Thomas  J K Nelson 《Research quarterly for exercise and sport》1991,62(1):105-108

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Wood-working machinery     

J. Richard 《Journal of The Franklin Institute》1870,90(2):89-96

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The Past History of the Medical Library Association,Inc     

Ballard JF 《Bulletin of the Medical Library Association》1948,36(4):226-241

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Call for participation Winter School on Coding Theory     

J. Kowalski-Glikman 《Resonance》2003,8(8):111-111

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江西农村居民开展武术活动的现状与发展建议     

王俊奇  刘国华  饶爱蓉 《搏击·武术科学》2004,(2)

为了解江西农村居民开展武术活动的情况,为江西全民健身提供指导,通过问卷调查,文献资料,专家访谈等方法,对江西农村居民的武术观念、习武行为和制约因素及发展趋势进行研究,针对以上现状提出江西农村居民参加活动的发展建议。  相似文献   

THE PROBLEM OF PLAGUE AS AN EPIDEMIC DISEASE     

Sears HJ 《Bulletin of the Medical Library Association》1940,29(1):9-16

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Spiel,Zivilisation, gesellschaftlicher Umbruch     

M. Krüger 《Sportwissenschaft》1994,24(4):403-406

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Summertime and insect stings     

Richard J. Sagall 《Early Childhood Education Journal》1992,19(4):48-48

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Think it over     

J. Chandrasekhar  Uday Maitra 《Resonance》1996,1(1):98-100

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Environmentally-induced stone decay: the cumulative effects of crystallization–hydration cycles on a Lincolnshire oopelsparite limestone     

Belinda J. Colston  David S. Watt  Helen L. Munro   《Journal of Cultural Heritage》2001,2(4)

An investigation has been undertaken at St Andrew’s church, Walpole St Andrew, Norfolk, to establish the underlying causes of the observed stone decay to the upper parts of the six stone piers. The stone decay was first recorded in the early 1930s. The salt-contaminated masonry within the church has been shown to undergo severe salt decay during the summer, with little damage occurring over the winter months. The south aisle piers have been shown to decay 2.5 times faster than the north aisle piers. Although crystallization–hydration cycles have been identified, the rate of decay is at its greatest when the cycling is relatively infrequent. This was not the expected trend. Furthermore, it has been shown that during extended periods where the ambient relative humidity is less than 75%, the rate of decay reaches a maximum. It is the length of this ‘drying’ period that apparently has the greatest influence on the rate of decay and could explain the significant difference in the rate of decay between the south and north aisle piers. The results have serious implications for passive conservation, where it is often recommended to lower the ambient relative humidity to well below the equilibrium relative humidity of the salt contaminant, to avoid crystallization–hydration cycles. Since, at the time of building, the church was situated on the coast, it is possible that the sodium chloride contamination occurred during the building process (1440–1520), particularly since the area was prone to sea-flooding at this time. Alternatively, the salt could have been applied as a treatment during the general restoration of 1897. Whatever the source of the salt, it seems likely that the ambient environment was changed by the insertion of a sealed floor in 1897, which could account for the onset of the salt decay.  相似文献