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SummaryThe rate at which chloride ions diffuse from archaeological iron into a treatment solution depends on how the chloride ions are initially distributed in the corrosion layer. This paper compares solutions of the diffusion equation for two limiting cases: (1) where the chloride ions are initially spread uniformly through the corrosion layer; and (2) where the chloride ions are initially concentrated at the interface between the iron and the corrosion layer. Although the first model has been used in the past to describe chloride ions diffusing from marine iron, the second is more appropriate in cases where corrosion has drawn chloride ions toward the iron surface. Because diffusion processes in archaeological iron are complicated, the limitations of both these models are discussed. 相似文献
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This paper highlights the framework and discusses the results of an action research network which aimed to promote academic access in two general educational settings within which a pupil with blindness and a deaf pupil were educated respectively. The persons involved in this collaborative scheme were general teachers, a school counsellor, academic staff and student teachers. The findings of the study indicate that the implementation of the action research network resulted in the development of inclusive and collaborative thinking and the adoption of relevant teaching practices which promoted the children's access to the curriculum and supported the teachers' and student teachers' professional development. The outcomes of this action research network raise concerns about the access and the status of membership of children with special needs in general educational classroom and provide insights for the pivotal role of action research in understanding educational contexts and situations from a number of different perspectives. 相似文献
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Abeer Arafat Maram Na’es Vicky Kantarelou Naseem Haddad Anastasia Giakoumaki Vasilike Argyropoulos Demetrios Anglos Andreas-Germanos Karydas 《Journal of Cultural Heritage》2013,14(3):261-269
Selected copper alloy artefacts from the collection of the Umm Qais museum at Irbid, Jordan, were studied by SEM-EDS analysis, while in situ analyses were performed by means of portable μ-XRF and LIBS spectrometers. Analysis and characterization of base metal and corrosion products of the copper alloyed artefacts were performed in relation to the environmental conditions of the display and as part of the overall assessment of the museum environment. Findings of this study are directed towards guiding a preventive conservation strategy for the copper alloyed artefacts at the Umm Qais museum. 相似文献
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Katherine A. Prentice Erica K. Argyropoulos 《Medical reference services quarterly》2018,37(2):132-141
The objective of this article is to describe the recent space and furniture utilization study conducted through direct observation at the small, academic-centered Schusterman Library. Student workers from the library’s reference desk monitored two semesters of use and went on to observe a third semester after electrical power upgrades were installed. Extensive use details were collected about where library patrons sat during which parts of the day, and certain areas of the library were ultimately identified as much more active than others. Overall, the information gathered proved useful to library planning and will be valuable to future space initiatives. This article further demonstrates feasible means for any library to implement a similar study with minimal resources. 相似文献
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