排序方式： 共有54条查询结果，搜索用时 15 毫秒
1.
A series of light-fastness tests were conducted on a group of ethnographic objects that will be on exhibit at the Smithsonian Institution Arctic Studies Center, a recent addition to the Anchorage Museum at Rasmuson Center in Alaska. The objects surveyed belong to the collections of the Smithsonian National Museum of Natural History and the Smithsonian National Museum of the American Indian. This work was designed as a feasibility study on the use of a micro-fading tester as a non-contact and non-destructive technique to evaluate the light-stability of materials present in ethnographic collections. A broad range of objects containing a wide variety of materials were selected for the study. The materials investigated included a variety of dyes applied on silk, cotton, and wool substrates along with some unusual materials such as tanned skin and seal gut skin. The results from this investigation have allowed establishing exhibition recommendations taking into consideration the sensitivity of each object, light levels in the museum building, and estimated light exposures based on the duration of the exhibit. The micro-fading tester has proven to be a very useful tool for determining the light-stability of ethnographic materials without causing any harm to the objects. Objects containing equivalent materials are usually classified under a general category based on their probable sensitivity to light. However, micro-fading test results have permitted the detection of dissimilarities among some of these objects, which could be associated to variations in prior fading histories, the quality of raw materials, and different preparation methods. 相似文献
2.
维贝克 《洛阳师范学院学报》2015,(3):1-8,145
在对各种技术道德研究路径进行分析的基础上,展开对技术是否可以作为道德行动者的审视,并从道德调节入手,以对构成道德能动性的两个必要条件——意向性和自由——的非人文主义分析为基础,重新思考伦理学中物的地位,借助于阐述物在道义论、目的论、美德论伦理学中的作用来创建认真对待技术道德相关性所需要的空间,即通过道德调节来有效构建通向将技术道德化的理论途径。 相似文献
3.
技术人工物的本体属性经过还原后存在多种争议，造成使用者和设计者在对其认知和行为方式上的困扰。本文通过技术人工物的“两重性”和“三重性”的溯源；伦理实在性的前提批判；伦理本体属性的考量和“四重性”的实践进路，四个层面解析技术人工物底层属性逻辑的问题，以期伦理转向视角为技术人工物的技术治理提供一些解决思路。 相似文献
4.
从“赵红州识别科学成果问题”出发 ,结合“知识单元”和信息与通讯技术演化等实例 ,针对人工物的复杂性和多样性 ,提出了人工物测度、人工物标度、人工物信息含量和人工物信息含量密度等概念 ,从而找到了如何识别人工物优劣的途径。 相似文献
5.
根据氯离子在外电场作用下同时发生电迁移和浓度扩散传质的特性,用数学模型研究铁器文物中氯离子存在形式以及在脱氯过程中的变化情况,为下一步深入研究提供理论依据和参考。 相似文献
6.
陈多闻 《科学技术与辩证法》2011,(3):63-66,112
技术人工物双重属性的技术解释学论纲强调,技术的结构由设计所确定,而技术的功能则由使用所赋予,这就进一步将人们的视野聚焦到生活世界,由此产生的一个困惑是：可持续的到底是技术还是使用？诚然,技术为使用提供的仅仅是“已经在此”的人工物,而使用则将这种“已经在此”的人工物转变为“上手”和“在手”的人工物。 相似文献
7.
Pauline Davey Zeece 《Early Childhood Education Journal》2008,36(3):275-279
During early childhood, children adopt a design-based conception of books with increasing consistency. It is not clear if
or how young children spontaneously indentify the myriad of commercially produced, book-related props, toys, and other materials
as support for their early literacy activities. Guidelines for evaluating these supplementary materials are presented and
thirteen books are reviewed and recommended. 相似文献
8.
WU Jing YE Xiu-qing GU Wei-kang 《浙江大学学报(A卷英文版)》2007,8(6):841-848
This paper proposes a new adaptive post-filtering algorithm to remove coding artifacts in block-based video coder. The proposed method concentrates on blocking and ringing artifacts removal. For de-blocking, the blocking strength is identified to determine the filtering range, and the maximum quantization parameter of the image is used to adapt the 1D fuzzy filter. For de-ringing, besides the edge detection, a complementary ringing detection method is proposed to locate the neglected ringing blocks, and the gradient threshold is adopted to adjust the parameter of 2D fuzzy filter. Experiments are performed on the MPEG-4 sequences. Compared with other methods, the proposed one achieves better detail preservation and artifacts removal performance with lower computational cost. 相似文献
9.
研究的逻辑起点决定了研究方向和内容。对现象学技术哲学来说,不同的逻辑起点意味着现象学技术哲学研究的不同路径。美国现代技术哲学家阿尔伯特.伯格曼以技术人工物作为研究的逻辑起点,分析现代技术所呈现的世界图景,最终形成装置范式技术哲学研究纲领,并以装置范式论闻名于技术哲学界。对这一纲领逻辑起点的研究,有助于从整体上把握装置范式论思想及其意义。 相似文献
10.
现代排球比赛中网上精彩激烈的争夺战就是在扣球与拦网中展开的。本研究对2012-2013年中国排球联赛福建赛区的7场29局比赛拦网的统计数据进行分析,通过对比8支球队在拦网技术方面的数据,分析我国男子排球甲级队伍的拦网技术的现状,从中找出福建师范大学男排拦网技术的优势和薄弱环节,为今后的训练提供参考。 相似文献