Psycho logics: Techno bits and desire bytes in the worlds of vlrtuality and analysis     

Patricia O’Riley  Daniel Scott 《The Australian Educational Researcher》1996,23(3):97-107

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Discolouration of Gold Decorations     

Anders G. Nord  Kate Tronner  Christian Thorén 《文物保护研究》2018,63(4):189-193

Discoloured 18-carat gold decorations from Sweden have been analysed by scanning electron microscopy with energy dispersive X-ray spectroscopy and X-ray electron spectroscopy (XPS)/electron spectroscopy for chemical analysis (electron spectroscopy).The original gold composition was close to 75% gold, 13% silver, and 12% copper. After manufacture, many details were boiled in sulphuric acid. As a consequence of this, the surfaces are irregular and porous with a gold concentration around 90% and with less than 1% copper. With XPS the outermost 10–20 atomic layers could be examined. No copper was present here, and the silver concentration was significantly higher. Also carbon, sulphur, oxygen, and (in one case) chlorine were present. The valence numbers indicated that gold only occurred in its metallic state, while silver (as Ag⁺) was preferably associated with sulphur to form black silver sulphide (Ag₂S). The grey discolorations are basically due to silver sulphide and organic dirt. Sometimes green, violet, and ‘copper-shining’ colours occur, presumably as a result of light refraction phenomena.  相似文献   

National Museum in Peru: Guidelines and Policies for the Relocation of Cultural Assets     

Rosanna Kuon  Lorice Sivira  Marcela Rosselló  Maria Inés Velarde 《文物保护研究》2018,63(5):372-376

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The Promise of the Transparency Culture     

Ester Appelgren  Ramón Salaverría 《Journalism Practice》2018,12(8):986-996

In 2013, with the introduction of the Transparency Law in Spain, a number of Spanish newsrooms started working with data journalism methods. In Sweden, which has one of the oldest Freedom of Information acts in the world, newsrooms invested in the skill development of data journalism at approximately the same time. Because previous research suggests that access to public data has been one of the key driving forces for the development of data journalism worldwide, it is important to understand how legislation is actually shaping the practice of data journalism. Based on a survey of 66 key informants in Spain and Sweden and ten in-depth interviews with data journalists from five media companies in each country, we conducted a comparative study, building on the frameworks of media systems to explore data journalism practices in these two countries. The differences found indicate that the national and EU legislation in both nations shape journalistic strategies for accessing data, turning journalists at times into activists fighting for the right to access public data. Beyond the law, data journalists advocate for a transparency culture among the civil servants, in order to secure public accountability.  相似文献   

Learning to live together: A priority challenge at the dawn of the twenty-first century     

John Daniel 《Prospects》2001,31(3):263-268

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多媒体教室扩声系统的设计     

陈金坤 《中国教育技术装备》2004,(9):8-9

介绍多媒体教室扩声系统的声学条件，设备配置方案，总体评价和管理维护的一般问题。  相似文献   

News Sources and Follow-up Communication     

Daniel Nölleke  Christoph G. Grimmer  Thomas Horky 《Journalism Practice》2017,11(4):509-526

For sports actors, social media provide the opportunity to bypass sports journalism's gatekeeping function and to disseminate sports-related information to target groups directly. Thus, social media have been conceptualized as a competitor to journalism. We argue that the relation is much more diverse. We differentiate between competitive, integrative, and complementary facets of the relationship between sports journalism and social media. Our study focuses on complementarity and analyzes how far social and mainstream media serve as sources for each other. Therefore, we combine an online survey among 122 German sports journalists, an analysis of the Twitter networks of German sports journalists during the Winter Olympics 2014, and a content analysis of the most popular news items in social media. Results suggest that sports journalists perceive social media accounts of athletes as beneficial news sources, especially to gather inside information. Huge sports events influence the social media activities of sports journalists as they tend to have stronger connections to athletes at these times. Whereas social media appear to be significant sources for sports journalism, sports media content receives little attention in social media. However, our results indicate that sports journalism and social media indeed maintain a complementary relation.  相似文献   

Environmental Sensitivity among Wisconsin High School Students   总被引：1，自引：2，他引：1  

Daniel J. Sivek 《Environmental Education Research》2002,8(2):155-170

A two-phase study was conducted to assess influences on environmental sensitivity (ES) in Wisconsin high school students. Phase I employed a focus group methodology; phase II employed a paper survey. Three categories of influences emerged from phase I: environmental, role model, and personality. Other results were consistent between both study phases. The influence most frequently cited by students as most important was time spent outdoors. The second most frequently mentioned influence was male teachers. The most frequently mentioned trait of role models was that they were 'friendly/personable'. A profile of environmentally sensitive high school students was developed.  相似文献   

Does Student Effort Respond to Incentives? Evidence from a Guaranteed College Admissions Program     

Daniel M. Leeds  Isaac McFarlinJr.  Lindsay Daugherty 《Research in higher education》2017,58(3):231-243

This paper studies the effects of guaranteed college admission on student effort and achievement. In 1997, Texas enacted the “Top Ten Percent” law, which guarantees admission to any public college for students in the top ten percent of their high school class. In practice, eligible students become aware of their admission status at the end of their junior year in high school—more than 1 year prior to attending college. We use data from a large, urban school district and regression discontinuity methods to test for effects on effort. Our preferred estimates show that students who barely qualify for the admissions guarantee earn marginally lower grades and take fewer advanced courses in their senior year compared to students who do not qualify for guaranteed admission and learn their status in the final senior year term. We find qualitatively similar results when limiting our sample to finer bandwidths, although the estimates are imprecise.  相似文献   

Transforming the CIP Data Block: Assessing User Needs to Re-envision a Venerable Library Icon     

Karl Debus-López  Marilyn McCroskey  Regina Romano Reynolds  Caroline Saccucci  Camilla Williams  Michele Zwierski 《Cataloging & classification quarterly》2017,55(7-8):522-548

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