Empirical Evaluation of the Reliability of Photogrammetry Software in the Recovery of Three-Dimensional Footwear Impressions

This paper examines the reliability of Structure from Motion (SfM) photogrammetry as a tool in the capture of forensic footwear marks. This is applicable to photogrammetry freeware DigTrace but is equally relevant to other SfM solutions. SfM simply requires a digital camera, a scale bar, and a selection of oblique photographs of the trace in question taken at the scene. The output is a digital three-dimensional point cloud of the surface and any plastic trace thereon. The first section of this paper examines the reliability of photogrammetry to capture the same data when repeatedly used on one impression, while the second part assesses the impact of varying cameras. Using cloud to cloud comparisons that measure the distance between two-point clouds, we assess the variability between models. The results highlight how little variability is evident and therefore speak to the accuracy and consistency of such techniques in the capture of three-dimensional traces. Using this method, 3D footwear impressions can, in many substrates, be collected with a repeatability of 97% with any variation between models less than ~0.5 mm.     

高校学生工作新闻发言人危机处理的媒体应对策略

近年来,高校危机事件频发,引起了社会各方的广泛关注。危机事件如果处理不当,高校多年来建立起来的良好形象会因此受到重创。高校学生工作新闻发言人要掌控学生工作条线的危机事件,谙熟新闻媒体建构与再现危机事件的基本原理与方法,在集体把关的基础上采取相应的危机处理与媒体应对策略。     

How mass media attract political elites’ attention

Political agenda‐setting research has shown that policy makers are responsive vis‐à‐vis media priorities. However, the mechanisms behind this effect have remained understudied so far. In particular, agenda‐setting scholars have difficulties determining to what extent politicians react to media coverage purely because of the information it contains (information effect), and to what extent the effect is driven not by what the media say but by the fact that certain information is in the media (media channel effect), which is valued for its own sake – for instance, because media coverage is considered to be a reflection of public opinion. By means of a survey‐embedded experiment with Belgian, Canadian and Israeli political elites (N = 410), this study tests whether the mere fact that an issue is covered by the news media causes politicians to pay attention to this issue. It shows that a piece of information gets more attention from politicians when it comes via the media rather than an identical piece of information coming via a personal e‐mail. This effect occurs largely across the board: it is not dependent on individual politician characteristics.     

Minority Interest Nation: The Changing Contours of Reporting Scotland on BBC and STV

Scotland's media has traditionally provided one of the central aspects of Scottish distinctiveness, autonomy and identity. This has often historically been viewed unproblematically and uncritically, but in recent times, the selective discourses of the mainstream media have come under increasing scrutiny and challenge, particularly in the recent independence referendum. This article examines the changing output of BBC and STV, considering in detail the evening news and current affairs programmes of both channels, and charting how they have evolved in media content and output. It also examines wider output and representation by BBC and STV, and concludes by addressing the evolving political and media environment.     

Intraparty Hostility: Social Identity,Subidentity, and the Hostile Media Effect in a Contested Primary

The hostile media effect (HME) has generally been tested in terms of in-groups and out-groups, with a “neutral” story in between. This ignores the nature of many social groups as comprising subgroups, often but not always sharing feelings of connectedness and purpose. In cases when bounded subgroups are at odds with one another, HME provides little guidance. A contested partisan primary provides such a case. This study takes identity centrality, candidate favorability, and perceived social network homogeneity as measures of partisanship and involvement, hypothesizing relationships between each and perceived bias against one’s candidate and party. Findings show that markers of candidate-focused social identity predict greater perceived bias against one’s candidate during the 2016 primary season, while party-focused identity fails to predict perceived bias against one’s party. This suggests that candidate support identity overrides plain partisanship during primaries, supporting concern that a heated primary might damage general election party unity. Subsequent postconvention findings suggest that the salience of candidate-focused identity fades, while homogeneity of one’s network regarding party support helps to make perceived hostility toward one’s party identity more salient. However, as campaigns become more candidate-centered, the contestation between nested candidate and party identities may grow fiercer.     

数字图书馆版权问题解读：资源·传播·服务

随着互联网延伸广度和深度的不断发展,数字图书馆版权纠纷案件日益增多。文献数字化、数据库建设、网络传播、网络信息链接、下载、检索等各方面都涉及到版权问题。这些问题可以归结到三个方面：资源建设中的版权问题、信息传播中的版权问题和信息服务中的版权问题。我们应加强版权适度保护,推行公益性图书馆网络传播豁免权,健全著作权集体管理制度,完善相关法律规范。     

Just Use What You Have: Ethical Fashion Discourse and the Feminisation of Responsibility

ABSTRACT

The rise of fast fashion has meant that young women (even those on relatively low incomes) are able to ‘regularly consume and discard fashionable clothing’ [Buckley, Cheryl, and Hazel Clark. 2012. “Conceptualizing Fashion in Everyday Lives.” Design Issues 28 (4): 18–28. doi:10.1162/DESI_a_00172., 21]. While this development may be aligned with the democratisation of fashion—the fact that the supply chains that deliver fast fashion are not consistent with the principles of global democracy is now also relatively common knowledge in the democratised West. This, along with growing awareness of the ecological harms associated with the fashion industry has contributed to what Elke Gaugele [2014. Aesthetic Politics in Fashion. Vienna: Sternberg Press] has termed the ‘ethical turn’ in fashion. However, despite the fact that young women are often not deemed capable of translating their (ethical) attitudes into (ethical) behaviours [McNeill, Lisa, and Rebecca Moore. 2015. “Sustainable Fashion Consumption and the Fast Fashion Conundrum: Fashionable Consumers and Attitudes to Sustainability in Clothing Choice.” International Journal of Consumer Studies 39 (3): 212–222], nor able to be ‘trusted to consistently make good decisions’ [Brooks, Andrew. 2015. Clothing Poverty: The Hidden World of Fast Fashion and Second-Hand Clothes. London: Zed Books, 241], they are also increasingly being called to recognise their individual role in the politics of global fashion supply chains. Drawing on examples from scholarly and popular discourses as well as online peer to peer communications, this article explores the historical moment of fast fashion as an instance of both the feminisation of consumption and the feminisation of responsibility.     

Intra-Campaign Changes in Voting Preferences: The Impact of Media and Party Communication

An increasing number of citizens change and adapt their party preferences during the electoral campaign. We analyze which short-term factors explain intra-campaign changes in voting preferences, focusing on the visibility and tone of news media reporting and party canvassing. Our analyses rely on an integrative data approach, linking data from media content analysis to public opinion data. This enables us to investigate the relative impact of news media reporting as well as party communication. Inherently, we overcome previously identified methodological problems in the study of communication effects on voting behavior. Our findings reveal that campaigns matter: Especially interpersonal party canvassing increases voters’ likelihood to change their voting preferences in favor of the respective party, whereas media effects are limited to quality news outlets and depend on individual voters’ party ambivalence.     

Social semiotics and platform studies: an integrated perspective for the study of social media platforms

ABSTRACT

The development of web 2.0 was powered by web services that are software systems designed to support interoperable machine-to-machine interaction over a network. It was the choice of standards enabling such interactions that favored communication among different systems and their mash ups. Facebook was the first social networking site to launch a service for developers that exposed its web services and the correlated APIs (application programming interfaces). This choice allowed programmers to create tools that could live within Facebook and turned the social networking site into a platform by enacting its programmability. In order to investigate the possibilities and the constraints offered by social media platforms, there seems to arise the necessity to integrate the analysis of frontend texts (such as posts or comments) and of social media communicative properties with the exploration of an underlying layer constituted by the network of relationships created within an application ecosystem and developed by using web services. The aim of the paper is to present a multi-layered approach to the study of social media platforms that combines the emerging subfield of Semiotic Technology with Platform Studies. The model is here applied to the analysis of Facebook Login Service.     

Examining the Effects of Social Media Use on Job Satisfaction in the Australian Public Service: Testing Self-Determination Theory

The purpose of this study is to investigate the relationship between social media usage for work purposes and employee job satisfaction in the public sector. Because social media is a relatively recent phenomenon, the ways in which it affects employee attitudes such as job satisfaction are not well-known. Using self-determination theory (SDT) as a framework, this study tests whether perceived competence, relatedness, and autonomy mediate the relationship between social media usage for work purposes and employee job satisfaction. Data were obtained from the Australian Public Service Commission (APSC). Overall, results generated from the structural equation models support SDT, suggesting that employees using social media for work purposes have higher self-determination and higher self-determination increases their job satisfaction. In particular, the effect of competence to job satisfaction is very high. However, while social media usage for work purposes can enhance employees’ need for autonomy and competence, it does not have any statistical effect to employees need for relatedness. In addition, social media does not have any statistical and direct effect to job satisfaction. The results suggest that social media has an indirect effect to job satisfaction. This article discusses the implications of these findings.