A multilevel approach for the damage assessment of Historic masonry towers     

Anna Anzani  Luiga Binda  Alberto Carpinteri  Stefano Invernizzi  Guiseppe Lacidogna 《Journal of Cultural Heritage》2010,11(4):387-470

In the paper some case studies of damaged towers in Italy are presented: the Tower Masserano of Palace Ferrero - La Marmora at Biella, the bell tower of the Collegiata of San Vittore at Arcisate, and three medieval towers in Alba. A methodology is put forward for combining laboratory and nondestructive testing methods with monitoring systems in order to reach the goal of evaluating the state of conservation of historic towers and its evolution in time.  相似文献   

Pore structure of historic and repair Roman cement mortars to establish their compatibility     

Anna Klisi&#x;ska-Kopacz  Renata Ti&#x;lova  Grzegorz Adamski  Roman Koz&#x;owski 《Journal of Cultural Heritage》2010,11(4):950-410

Mercury porosimetry was applied to the study of pore structure of the historic Roman cement mortars representative of different locations in Europe and time periods as well as different application techniques from architectural castings to in situ formed renders and profiles. Three categories of pores were found to coexist in the mortars. The finest pores, with diameters below 0.1 μm, are present within the hardened aged Roman cement matrix. The larger ‘air’ pores, with diameters between 0.2–2 μm, are due to the evaporation of the excess unbound water and restricted hydration. Pores larger than 2 μm are rare and, in general, can be related to microcracking induced by shrinkage drying and mortar weathering. The mortars have rarely been found to develop a dense fine-porous microstructure characteristic of the ideal conditions of moist-curing; massive architectural castings being the only exception identified. The presence of larger ‘air’ pores was, in turn, almost universally observed. The investigations of the freshly prepared Roman cement mortars have revealed that the restricted hydration could be due to the exposure of the freshly laid surface to dry real-world external environments, a high water-to-cement ratio in the original mortars, or the drawing of water from the stucco mass due to insufficient pre-wetting of the porous masonry. The insufficient reactivity of historic cements, resulting from a high content of over-burned, non-reactive cement components or coarseness of the cement grains, could be another reason for yielding poorly hydrated mortars in the past. In general, Roman cement stuccoes are in an excellent state of preservation in spite of their usual exposure to polluted urban environments for more than a century. Therefore, the coexistence of Roman cement mortars of widely different pore structures has not brought about any problems of incompatibility which field observations could reveal. The Roman cement repair materials have been found to develop pore structures similar to those of historic mortars. Therefore, they are in broad terms compatible with historic masonry or stuccoes. However, the porosity and strength of the repair materials can be controlled by a careful manipulation of the water-to-cement ratio of the mix to adapt them better to the properties of the host material.  相似文献   

Just Queer Folks: Gender and Sexuality in Rural America Colin R. Johnson. Philadelphia,PA: Temple University Press, 2013.     

Jennie Lightweis‐Goff 《Journal of American culture (Malden, Mass. : 2003)》2014,37(3):365-366

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Commemoration in America: Essays on Monuments,Memorialization, and Memory David Gobel and Daves Rossell,Editors. Charlottesville: University of Virginia Press, 2013.     

Jennie Lightweis‐Goff 《Journal of American culture (Malden, Mass. : 2003)》2014,37(3):343-344

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My Aspergirl: Stieg Larsson's Millennium Trilogy and Visualizations     

Sheng‐mei Ma 《Journal of American culture (Malden, Mass. : 2003)》2014,37(1):52-63

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The Cultural Image Literacy Assessment: One Hundred Images Every American Should Know     

Richard Emanuel  Siu Challons‐Lipton  Kim Baker 《Journal of American culture (Malden, Mass. : 2003)》2014,37(4):404-418

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Research Trends in Science Education from 2003 to 2007: A content analysis of publications in selected journals     

Min‐Hsien Lee  Ying‐Tien Wu 《International Journal of Science Education》2013,35(15):1999-2020

The present study was a follow‐up to Tsai and Wen’s (2005) earlier research, in which 802 articles published in the International Journal of Science Education, Science Education, and the Journal of Research in Science Teaching from 1998 to 2002 were analysed in terms of author’s nationality, research type, and research topic. In the present study a total of 869 papers published in the three journals from 2003 to 2007 were analysed, and the results were compared with those of Tsai and Wen. Moreover, this study also identified 31 highly‐cited papers published during 1998–2002 and 20 highly‐cited papers published during 2003–2007. The results showed that authors from countries other than the four major English‐speaking countries (i.e., the USA, the UK, Australia, and Canada) published an increasing number of articles in the past decade. During these five years (2003–2007), science educators showed relatively more interest in research topics involving the context of student learning. Besides, science educators have changed some of their research interests during 1998–2007, with a shift in the research topics from student conception learning and conceptual change (1998–2002) to student learning contexts (2003–2007). Moreover, the investigation of highly‐cited papers in the past decade revealed that studies on argumentation have gained significant attention among science educators.  相似文献   

Internet‐based Science Learning: A review of journal publications     

Silvia Wen‐Yu Lee  Ying‐Tien Wu  Meng‐Jung Tsai  Tzu‐Chien Liu  Fu‐Kwun Hwang 《International Journal of Science Education》2013,35(14):1893-1925

Internet‐based science learning has been advocated by many science educators for more than a decade. This review examines relevant research on this topic. Sixty‐five papers are included in the review. The review consists of the following two major categories: (1) the role of demographics and learners' characteristics in Internet‐based science learning, such as demographic background, prior knowledge, and self‐efficacy; and (2) the learning outcomes derived from Internet‐based science learning, such as attitude, motivation, conceptual understanding, and conceptual change. Some important conclusions are drawn from the review. For example, Internet‐based science learning is equally favorable, or in some cases more so, to learning for female students compared to male students. The learner's control is essential for enhancing students' attitudes and motivation toward learning in Internet‐based science learning environments. Nevertheless, appropriate guidance from teachers, moderators, or the Internet‐based learning environment itself is still quite crucial in Internet‐based science learning. Recommendations for future research related to the effects of Internet‐based science learning on students' metacognitive reflections, epistemological development, and worldviews are suggested.  相似文献   

Youth agency and adult influence: A critical revision of little publics     

Anna Hickey-Moody 《Review of Education, Pedagogy & Cultural Studies》2016,38(1):58-72

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Towards a Transformative Epistemology of Technology Education          下载免费PDF全文

DAVID MORRISON‐LOVE 《Journal of Philosophy of Education》2017,51(1):23-37

Technology Education offers an authentic and invaluable range of skills, knowledge, capabilities, contexts and ways of thinking for learners in the 21^st century. However, it is recognised that it occupies a comparatively less defined and more fragile curricular position than associated, but longer established, subjects such as Mathematics and Science. While recognising that no single factor lies behind such a condition, this paper draws upon thinking in the philosophy of technology, technology education and the ontology of artefacts to argue that transformation may be considered as an epistemic source for technology in a similar way to ‘proof’ within Mathematics and ‘interpretation’ within Science. Encapsulating technology's intimate relationship with materials, it is ultimately argued that the transformation of a technical artefact from an ill‐defined into a well‐defined ontological state constitutes a prime source of technological knowledge for pupils. Moreover, it provides an alternative route into further consideration about the nature of the domain, epistemology and curricular identity of the subject.  相似文献