Color characterization of roofing slates from the Iberian Peninsula for restoration purposes     

Beatriz Prieto  Perla Ferrer  Patricia Sanmartín  Victor Cárdenes  Benita Silva 《Journal of Cultural Heritage》2011,12(4):420

Substitution of slate roofing tiles is a conventional operation during building restoration, since tiles are very difficult to restore or clean because of the high degree of alteration they suffer. Criteria for replacement of historical building stones must be based on geological, geotechnical and esthetic parameters, among which color is of great importance. In this sense, this paper constitutes a comprehensive and useful colorimetric study of roofing slates from the Iberian Peninsula, for the purposes of restoration. The color of 50 commercial varieties of roofing slate mined in quarries from the 12 mining districts in the Iberian Peninsula was analyzed with a spectrophotometer device, by considering the CIELAB color space. The results of the study were used to develop a protocol for characterizing the color of roofing slate and to define the color range of roofing slate from the Iberian Peninsula. In addition, the similarities and differences in the color and microstructure of the different commercial varieties of Iberian roofing slate were established and the limit of acceptability of replacement of one type of slate by another was determined. Parameter h_ab was found to be the most important CIELAB color coordinate as regards the formation of homogeneous color groups, and the specular component excluded (SCE) mode was most sensitive as regards detecting color differences between two samples.  相似文献   

Learning Science and About Its Nature: Two Conferences and One Book     

André Ferrer Pinto Martins 《Science & Education》2016,25(3-4):457-460

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Languages,Minorities and Education in Spain: The case of Catalonia     

Ferran Ferrer 《比较教育学》2000,36(2):187-197

The intent of the article is to provide an analysis of Catalan language use in the school classroom from a historical, political and socio-linguistic perspective. In so doing, this article seeks to explain Catalan's remarkable revival in Catalonia over the past twenty years, particularly in the area of education. Catalan language policy in the schools mirrors language policies pursued in other sectors of Catalan society, and is consistent with Catalan's increasing social and institutional use. The article steadily narrows the focus of its analysis, beginning first with a discussion at the national level, then at the regional level, and finally at the school level. Subsequent to this analysis, the article then sets out what it considers to be the principal challenges facing Catalan in the schools today and in the years ahead, and possible solutions to them.  相似文献   

Innovatory aspects of Cuban education     

Raúl Ferrer Perez 《Prospects》1972,2(3):361-368

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Student performance prediction,risk analysis,and feedback based on context-bound cognitive skill scores     

MD  Soumya  Krishnamoorthy  Shivsubramani 《Education and Information Technologies》2022,27(3):3981-4005

Education and Information Technologies - In recent times, Educational Data Mining and Learning Analytics have been abundantly used to model decision-making to improve teaching/learning ecosystems....  相似文献   

The many applications of kinetic family drawings in child abuse     

H.M. Schornstein MD  J. Derr MA 《Child abuse & neglect》1977,1(2-4)

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From post-modernism to modernity again. From modernity to a paradigm shift     

Albert Ferrer 《Educational Philosophy and Theory》2018,50(14):1428-1429

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Introduction to the open file     

Alejandro Tiana Ferrer 《Prospects》1998,28(1):21-29

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The technological gender gap: Evidence and recommendations for educators and computer-based instruction designers     

Katherine Canada MD  Frank Brusca 《Educational technology research and development : ETR & D》1991,39(2):43-51

The term technological gender gap refers to the idea that males and females have different technology-related attitudes, behaviors, and skills. This article reviews the mounting evidence documenting the existence of a gender gap, which, if ignored, could render large numbers of female students unprepared to meet the technological challenges of the future. Recommendations for ameliorating the technological gender gap are presented for educators and computer-based instruction (CBI) designers who are interested in providing equitable educational opportunities for male and female students.  相似文献   

Antioxidant response and oxidative damage induced by a swimming session: influence of gender     

Tauler P  Ferrer MD  Romaguera D  Sureda A  Aguilo A  Tur J  Pons A 《Journal of sports sciences》2008,26(12):1303-1311

In this study, we examined oxidative stress after a swimming session, the responses of the antioxidant defences, and the influence of gender on these responses. Fifteen boys and eight girls participated voluntarily in the study. Plasma concentrations of 17-beta-estradiol, vitamin E, retinol, carotenes, ascorbate, malondialdehyde, and the carbonyl index were determined. Creatine kinase, gamma glutamyl transpeptidase, and lactate dehydrogenase activities, as well as glucose, urea, urate, cholesterol, and triglycerides, were determined in serum. Plasma concentrations of 17-beta-estradiol were higher in girls than in boys. Exercise increased plasma ascorbate both in boys and in girls. Malondialdehyde increased in boys but was maintained in girls after exercise. Creatine kinase values corrected for lean body mass were similar in boys and girls at baseline, but the post-exercise values in boys were higher than in girls. A positive correlation was observed in boys, but not in girls, between plasma malondialdehyde and creatine kinase corrected concentrations. Furthermore, a negative correlation was observed between the increase in circulating neutrophils and in creatine kinase activity in girls but not in boys. In conclusion, a swimming session induced higher muscular and oxidative damage in boys than in girls.  相似文献