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   

Response to Siegel     

J F Carlisle 《Journal of learning disabilities》1990,23(5):267-9, 319

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Electronic circuits and tubes: by the Electronics Training Staff at the Cruft Laboratory,Harvard University. 948 pages,illustrations, 15 × 23 cm. New York,McGraw-Hill Book Co., Inc., 1947. Price, $7.50     

H.N. Michael 《Journal of The Franklin Institute》1948,245(6):533-534

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Detoxication mechanisms.The metabolism of drugs and allied organic compounds: by R. Tecwyn Williams. 288 pages, 14 × 22 cm. New York,John Wiley & Sons,Inc., 1948. Price, $5.50     

Henry N. Michael 《Journal of The Franklin Institute》1948,245(6):528

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Observations on siemens' unit     

F. Kohlrausch 《Journal of The Franklin Institute》1871,91(5):349-355

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Field practice: by Elwyn E. Seelye. A Data Book For Civil Engineers.306 pages,tables, drawings and illustrations, 13 × 211 curs. New York,John Wiley & Sons,Inc., 1947. Price $4.50     

H.N. Michael 《Journal of The Franklin Institute》1948,245(5):445-446

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Zur Geschichte Olympias in der Antike     

Michael Krüger 《Sportwissenschaft》2004,34(2):218-222

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Development of maximal oxygen uptake in young elite male cross-country skiers: a longitudinal study.     

F Ingjer 《Journal of sports sciences》1992,10(1):49-63

The aim of this study was to investigate the effects of extensive endurance training (15-25 h per week) on the development of maximal oxygen uptake (VO2 max) in boys from puberty. Maximal oxygen uptake was measured a number of times each year from the age of puberty and for the next 6-9 years in seven young male elite cross-country skiers. Mean VO2 max was measured as 76.3 and 80.1 ml kg-1 min-1 at the ages of 14 and 15 years respectively. Despite the fast rate of growth during puberty, maximal aerobic power showed seasonal variations from the age of 14, reaching a plateau at the age of 15, whereas VO2 max (ml kg-2/3 min-1) increased continuously. It is concluded that, during puberty, boys probably attain significant increases in VO2 max when appropriate amounts of endurance training are undertaken.  相似文献   

儿童青少年运动员的营养需要     

Oded Bar-Or　Linda Houtkooper　Susan Barr　Anita Rivera-Brown　Michael Bergeron　Tom Rowland　Ruth Carey　Suzanne Steen　Priscilla Clarkson 《体育科学》2001,21(5):89-93

1. 儿童青少年运动员应该食用多样化的食物，其中，蛋白质应占膳食总能量的12％-15％，碳水化合物至少占55％，而脂肪至多占30％。日常生活中如何吃才能满足这些要求呢？膳食指南宝塔提供了一条可行之道。2.有些营养素对热爱运动的儿童青少年运动员非常重要，要保证摄入充足，这些营养素是碳水化合物（包括纤维素）、维生素B6、维生素D、铁、钙、镁、锌、铬。科学合理、包罗各类食物的平衡膳食，对青少年运动员最大程度地全面摄取各种营养素，满足生长发育和运动训练的需要，是非常必要的。3.鼓励儿童青少年运动员在运动训练前、中、后进行补液，以避免脱水的发生。4.如果膳食合理平衡，就没必要额外补充营养品。  相似文献   

Eine generische Komponente zur rechnergestützten Nutzung von Aufbauorganisationen     

Stefan Jablonski  Michael Schlundt und Hartmut Wedekind 《Informatik - Forschung und Entwicklung》2001,16(1):23-34

Zusammenfassung.   Die klassische Unterscheidung zwischen Aufbau- und Ablauforganisation eines Unternehmens deutet auf eine getrennte rechnergestützte Realisierung dieser beiden fundamentalen Komponenten einer Organisation hin. Dieser Beitrag unterstützt diese These, verweist aber gleichzeitig auf die integrierende Bedeutung einer rechnergestützten Aufbauorganisationsverwaltung, welche unterschiedliche Realisierungsformen der Ablauforganisation (unter anderem workflow-management und eCommerce) bedient. Die generelle Konzeption und Umsetzung einer solchen Aufbauorganisationsverwaltung wird in diesem Beitrag vorgestellt. Eingegangen am 14. Februar 2000 / Angenommen am 31. Mai 2000  相似文献