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《文物保护研究》2013,58(3):147-151
AbstractIn conducting research on the physical propertIes and durabIlIty of coating materials used in the conservation of art objects, difficulty was encountered In efforts to make uniformly thick, coherent, free-standing films for testing purposes. An efficientrapid casting technique has been developed utilizing reusable molds. The technique is applicable to the preparation of films from a wide range of materials. 相似文献
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《文物保护研究》2013,58(2):110-119
AbstractSilver oxide is currently used to treat isolated spats of bronze disease, forming a seal of silver chloride. The technique is not infallible: an analytical study showed that the conductive properties of the silver chloride seal, together with the comparatively poor moisture barrier formed, are the factors responsible for failure. In the new zinc dust treatment proposed, tough, adherent and relatively stable zinc compounds form an improved barrier, effectively sealing the area of bronze disease. Objects treated with zinc dust were subjected to high humidity for several months and afterwards exposed to a tropical humid environment for four to five years. These objects showed no re-emergence of bronze disease whereas repeated use of silver oxide failed to stabilize the objects. The method developed is simple, less time-consuming, and relatively easy to employ. 相似文献
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AbstractThis paper describes the digital resources construction in China, such as e-books and e-journals, and the importance of e-learning for Chinese education. Knowledge objects are regarded as base elements in the microstructure of digital resources. The knowledge deconstruction and reconstruction process is proposed for creation and reorganization of knowledge objects that serve as the knowledge elements in teaching reference materials. Based on knowledge objects and the knowledge deconstruction and reconstruction process, the Digital Teaching Reference Book System (DTRBS) of Tsinghua University is designed and developed to provide the teaching reference book services in the platform of Web services. 相似文献
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《文物保护研究》2013,58(3):203-209
AbstractTo inhibit the corrosion of lead objects and lead in high-lead bronzes, particularly in the presence of organic emanations from wood, paint, etc., and/or high humidity, is a difficult conservation problem. A method to prevent corrosion of lead in copper objects was therefore developed using benzotriazole (BTA). The most appropriate treatment method for the conservation of the objects was to immerse them in neutral BTA solution, for which a 0.5% (w/v) concentration of BTA was enough. For bigger objects, three or four coats of 1.0% solution applied by brushing were equally effective. The method was used successfully for the conservation of some ancient copper coins and bronze sculptures containing high amounts of lead; it can also be used to inhibit corrosion of lead objects. 相似文献
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《文物保护研究》2013,58(2):57-69
AbstractThe sources and chemistry of waxes likely to be encountered in art objects are briefly reviewed and their gas-chromatograms are illustrated. Examples of the identification of waxes and wax-mixtures in a variety of objects are described, and the advantages for this purpose of gas-chromatography over infrared spectroscopy are indicated. 相似文献
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《文物保护研究》2013,58(4):184-188
AbstractThe pH dependency of turmeric, used as a dye or pigment on ethnographic objects from the Santa Cruz Islands, can present a conservation problem. Great care must be taken with the cleaning, consolidation, repair, storage and display of objects of this nature. A section on the analysis of suspected turmeric is included. 相似文献
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Three studies investigated whether 3‐ and 4‐year‐olds interpret television images as mere pictorial representations of objects or as real, physically‐present objects. Four‐year‐olds gave clear evidence of making the former interpretation whereas 3‐year‐olds seemed to make the latter one. However, the data suggest that the younger children's errors reflect a failure to differentiate conceptually between television images and their referent objects rather than a conviction that real objects populate television sets. 相似文献
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Lori S. Mestre 《图书馆管理杂志》2013,53(7-8):808-829
ABSTRACT Online instruction is quite prevalent on campuses and within libraries. Librarians are engaged in the creation of learning objects that can either be linked to or embedded within course-management systems. But are those instructional tools designed to best accommodate diverse learners or are they constructed to reflect the teaching and learning style of the designer? Results from a study (a survey of librarians, student usability studies, and interviews) document both considerations made in the creation of learning objects, and the effectiveness of learning objects from students’ perspectives. The findings may be useful for future modifications of these tools (e.g., tutorials, videos, podcasts, and PowerPoints). 相似文献
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《文物保护研究》2013,58(3):136-142
AbstractVarious desalination methods had been used in the past to treat a large collection of archaeological iron objects. In order to establish whether desalination treatments had been effective, the condition of the objects was assessed and the data analyzed using statistical methods. It was found that objects which had been treated using desalination methods were less likely to re-corrode, and the conclusion was that the development of more effective techniques of chloride removal would be useful. 相似文献
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《图书馆管理杂志》2013,53(3-4)
ABSTRACT Orientation for distance students often does not equal the ideal teachable moment for learning about library resources and services. Seeking ways to provide learning objects for students to use at the point of need, academic health sciences librarians have created printable guides, Flash video demonstrations and simulations, and interactive tutorials. This electronic poster demonstrates how the learning objects were created, modified, and inserted into various delivery platforms, such as the library's web page, course management system, and CD-ROM. 相似文献
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ABSTRACTLight sensitive objects will fade on display. Collection managers and curators face the dilemma whether to spread fading over several similar objects or sacrifice one. This paper describes an experiment in which participants were asked how they would want to pass on a collection of seventeenth century hand-coloured maps to coming generations. Results show that while colour changes are hardly visible, both public and professionals do not perceive them as damage and prefer to spread fading. Once fading becomes clearly visible in all maps, the preference shifts to sacrificing one map. The tipping point lies around five just noticeable changes. This information can be used when selecting objects for exhibition. The outcome also implies it would be prudent to assess the degree of fading of much exhibited objects and consider whether and when to choose for a sacrifice strategy. 相似文献
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《文物保护研究》2013,58(3):161-171
AbstractFour iron meteorite fragments and 13 archaeological iron objects were exposed to a lowpressure hydrogen plasma for up to two weeks in a pilot apparatus. In the experiment the objects acted as cathodes in a 600–1600V d.c. electrical field. While the chlorine-containing β-FeOOH, akaganeite, was present in all objects before the test, no akaganeite and no chlorides were present afterwards. The objects, including one meteorite which had been exposed for more than 5000 years to seawater, were found to be stable after the glow discharge treatment. The major mineral after treatment was identified as magnetite, and the objects generally assumed an iron-grey surface colour. No sputtering and no reduction to free iron took place under the test conditions, operating at or below 120°C and at pressures of O·4–1mb hydrogen. 相似文献
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Season Tse 《文物保护研究》2013,58(6):337-351
ABSTRACTSince 2008, the Canadian Conservation Institute (CCI) has provided microfade testing (MFT) as a service to more than 13 Canadian museums, archives, and galleries. In addition to obtaining lightfastness data for objects and collections planned for exhibition, MFT is also used for research and for training. This article summarizes the experiences and practices that arose from the variety of objects tested, the demand for the service, and the lessons learned. These include protocols to ensure reliable and reproducible results with multiple users, ways to report large number of results, and how MFT data are used with the CCI Light Damage Calculator for effective communication of the results with other museum staff for exhibit planning. 相似文献
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Carmen Kazakoff-Lane 《图书馆管理杂志》2013,53(7-8):747-766
ABSTRACT Reaching and teaching users in the diffuse, multigadget, online/mobile world is a significant challenge facing libraries. This article discusses how the ANimated Tutorial Sharing Project (ANTS) production model provides libraries with a sustainable approach to building large numbers of multimedia learning objects that are useful beyond one library. It will also discuss how ANTS file conversion and syndication efforts mean that these learning objects (1) can be made highly visible to users accessing content via a computer or smart phone and (2) enable libraries to establish a meaningful electronic presence for the purpose of providing point-of-need information literacy. 相似文献
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AbstractThe treatment of flaking pigment on two paintings, one on ceramic and the other on glass, is described; a brief history of painting on glass and ceramics places these works in context. The treatments are discussed in relation to other types of treatment for paintings on similar rigid supports. The longevity of the conservation methods used is discussed, as are the results of re-examination of the objects some years after the completion of the treatments. 相似文献
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《文物保护研究》2013,58(3):170-178
AbstractBy studying the mechanism of sulphation of silver-gilt objects in relation to the method used for gilding, its thickness and its appearance, it has been possible to develop a procedure for electrolytic treatment. The two-step treatment is carried out in a buffered solution of sodium nitrate and comprises cathodic reduction of the silver-based corrosion products followed by anodic dissolution of the reduced silver. The behaviour of the different materials is described, as well as certain limiting factors. 相似文献
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《文物保护研究》2013,58(3):148-152
AbstractMineralogical changes which occur during the reaction of copper(II) chloride with carbonate in aqueous solution have been investigated, and compared with those involving copper(I) chloride, nantokite, CuCI, and copper artifacts coated with malachite, CU2CO3(OH)2 The reactions observed and the products obtained are seen to have implications with respect to the use of aqueous sodium carbonate solutions to stabilize archaeological copper objects. The frequent observation of the mineralogically rare species chalconatronite, Na2Cu(CO3)2·3H2O, on the surface of treated objects is readily explained by known reaction chemistry. Its formation can be minimized by washing the object after treatment. 相似文献