Discolouration of Gold Decorations

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.     

Utilization of CSR to build organizations’ corporate image in Asia: need for an integrative approach

Corporate social responsibility (CSR) has been found to be a strong predictor of a favorable corporate image [Gray, 1986. Managing the corporate image: The key to public trust. London: Quorum Books]. Websites have become an essential communication platform [Dawkins, 2004. Corporate responsibility: The communication challenge. Journal of Communication Management, 9(2), 108–119]. This study aims to investigate how CSR can be used in enhancing organizational corporate image. Content analyses of 150 corporate websites of organizations in Asia headquartered in Singapore were conducted, followed by in-depth interviews with public relations (PR) practitioners to examine the motivations behind their CSR engagement. Findings showed that organizations utilized CSR as a means to enhance corporate image via four ways: Engaging in two-way conversations with stakeholders, adopting an inside-out communication approach with employees, recognizing the relevance of other CSR communication channels, and communicating CSR with authenticity. However, some organizations hesitate to use CSR communication to enhance their corporate image because they wanted to avoid being seen as using CSR as a promotional tool.     

A Modern Methodology for Teaching Programming at a University

The ubiquitous transition to high-tech systems in all spheres of human activity has led to an increase in the demand for specialists who are able not only to maintain such systems but also to refine and develop new ones. Therefore, when preparing bachelors in the 09.03.02 Information Systems and Technologies direction, the following questions become critical: What should be taught? How should it be taught? What tools should be used to teach? Based on the analysis of requirements of educational and professional standards developed in accordance with employers' requirements and realities of the information society, one approach to organizing the teaching of programming at a university is presented.     

The Promise of the Transparency Culture

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.     

多媒体教室扩声系统的设计

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。     

Why People Dual Screen Political Debates and Why It Matters for Democratic Engagement

Dual screening during televised election debates is a new domain in which political elites and journalists seek to influence audience attitudes and behavior. But to what extent do non-elite dual screeners seek to influence others, particularly their social media followers, social media users in general, and even politicians and journalists? And how does this behavior affect short- and longer-term engagement with election campaigns? Using unique, event-based, panel survey data from the main 2015 UK general election debate (Wave 1 = 2,351; Wave 2 = 1,168) we reveal the conditions under which people experience agency, empowerment, and engagement now that social media have reconfigured broadcast political television.