Medieval and renaissance glass technology in Valdelsa (Florence). Part 1: raw materials, sands and non-vitreous finds     

U. Casellato  F. Fenzi  P. Guerriero  S. Sitran  P. A. Vigato  U. Russo  M. Galgani  M. Mendera  A. Manasse 《Journal of Cultural Heritage》2003,4(4):337-353

A significant number of archaeological finds of the 13th–16th century from the Tuscan sites of Germagnana and Gambassi in Valdelsa—FI, was studied by different physico-chemical investigations (SEM–EDS, ICP, Mössbauer spectroscopy, XRD, XRF, TG-DTA) in order to contribute to clarify the production methodology and the pre-industrial glass manufacture technology. The studied samples are mainly non-vitreous finds as production waste, refractory materials, crucibles and raw materials; also vitreous finds as frits, skims, glasses (glass masses, glass working waste and finished products) have been taken into consideration. The obtained petrographic and physico-chemical data strongly suggest that both Gambassi and Germagnana glass manufactures were strictly connected with the sources of vitrifiable materials, situated in Tuscan sand quarries. In particular a comparison between sands from the neighbouring quarries and appropriate finds of the two archaeological sites evidences that the employed vitrifiable materials possibly belong to La Casina La Cava resort. The archaeological classification, based on macroscopic observation and stratigraphic position, was compared and verified with the scientific classification of the examined finds of Germagnana and Gambassi sites based on their composition, morphology and physico-chemical properties.  相似文献   

体育真义论   总被引：7，自引：0，他引：7  

张洪潭 《体育科学研究》2003,7(1):1-3

首先对体育能够增强体质，祛病保健，益寿延年的传统信条提出质疑，通过对体育的基本属性和两大种差特点的分析，提出体育是旨在强化体能的非生产性人体活动这一新概念。  相似文献   

论高校体育教学的创新与大学生负性情绪的调控   总被引：1，自引：0，他引：1  

汪伟 《四川体育科学》2003,(3):20-21

关注学生的心理问题，是创新高校体育教学的又一核心问题。笔者拟透视“情绪”这一视角，来分析当前高校体育教学对大学生情绪的影响，以求切准大学生带有社会性的整体情绪状态，来创新高校体育教学，以实现大学生身、心、群的全面发展。  相似文献   

教学实习中采用"说课"方法的实验研究     

侯柏晨  孙玉琴 《体育科学研究》2003,7(4):102-104

“说课”是授课者在有限的时间内，将一节体育课的教学内容、方法，课的组织形式、练习步骤以及场地、器材等运用情况，用简练准确的语言并配合清晰、简单的动作示范向听课者展现出来。实习生课前采用“说课”，能使各教学环节在头脑中加深印象，加快向教师角色意识转换的速度，有利于教学基本功的掌握，此方法具有可操作性和实用性。  相似文献   

高原训练的生物学效应   总被引：2，自引：1，他引：1  

蒋咸生 《体育成人教育学刊》2003,19(4):64-65

高原训练对人体有着复杂的生理学效应和训练学效应，是提高运动员运动能力的一种较好的赛前训练方法。对高原训练的起源及对人体呼吸、心血管、血液、骨骼肌、中枢神经等系统的影响进行了分析，为科学认识和实施高原训练提供参考。  相似文献   

新世纪我国老年体育发展的困境与出路   总被引：1，自引：0，他引：1  

李忠梅 《体育成人教育学刊》2003,19(3):19-20

通过对新世纪我国老年体育发展所面临的主要困境与产生困境的社会背景进行分析和讨论，指出应加大政府宏观指导的力度、完善老年体育管理体制，注重老年体育消费市场的开发，加大老年体育专业指导人员的培养力度，拓宽筹集老年体育活动资金的渠道，丰富老年体育活动内容等。  相似文献   

对加入WTO后我国高校体育教师素质的思考   总被引：2，自引：0，他引：2  

周立 《体育成人教育学刊》2003,19(3):25-26

分析了我国普通高校体育教师素质的现状，论述了加入WTO后，优秀的高校体育教师应具备的素质，并提出了提高我国普通高校体育教师素质的建议。  相似文献   

Retaking departments     

James D. Preston  Graves E. Enck 《Academic Questions》1992,5(1):70-74

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Physical activity levels of 5-11-year-old children in England as determined by continuous observation.     

M Sleap  P Warburton 《Research quarterly for exercise and sport》1992,63(3):238-245

Continuous observation of the physical activity of 56 preadolescent children was conducted in four regions of England from October 1988 to July 1989. Observations were undertaken during school break times, lunch times, and physical education lessons, as well as during the children's free time. Of total time observed, the children spent 32.4% of it engaged in moderate to vigorous physical activity (MVPA). Children were shown to be most active during school breaks and least active during free time at home. However, it is thought that cardiorespiratory benefits are best achieved by participation in sustained periods of MVPA. Only 8 (14%) of the 56 children were observed to participate in MVPA for sustained periods of 20 min or longer. A random sample of 55 physical education lessons was observed. Only 6 children engaged in MVPA for sustained periods of 5 min or more, and no children participated in MVPA for 10 min or longer. The implications of these results are that, although the children engaged in a reasonable amount of MVPA, it may not have been sustained for periods of sufficient length to produce a cardiovascular training response. Consideration is given to ways of promoting lifelong involvement in physical activity.  相似文献   

Reading achievement of prelingually deaf students and its relationship to parental method of communication: a review of the literature     

C M Kampfe  A G Turecheck 《American annals of the deaf》1987,132(1):11-15

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