Nearest-biclusters collaborative filtering based on constant and coherent values

Collaborative Filtering (CF) Systems have been studied extensively for more than a decade to confront the “information overload” problem. Nearest-neighbor CF is based either on similarities between users or between items, to form a neighborhood of users or items, respectively. Recent research has tried to combine the two aforementioned approaches to improve effectiveness. Traditional clustering approaches (k-means or hierarchical clustering) has been also used to speed up the recommendation process. In this paper, we use biclustering to disclose this duality between users and items, by grouping them in both dimensions simultaneously. We propose a novel nearest-biclusters algorithm, which uses a new similarity measure that achieves partial matching of users’ preferences. We apply nearest-biclusters in combination with two different types of biclustering algorithms—Bimax and xMotif—for constant and coherent biclustering, respectively. Extensive performance evaluation results in three real-life data sets are provided, which show that the proposed method improves substantially the performance of the CF process.

Who are We?

This article scrutinises the usage of the words “we”, “us” and “our” by BBC radio journalists when reporting and discussing news and current affairs. By analysing reports and discussions on the “flagship” Radio 4 Today, a daily news programme whose centrality to political and public debate is widely recognised, the article raises substantive questions about clarity, accuracy and impartiality in senior broadcast journalists’ choice of language. In exploring the assumptions which may underlie the invocation, via such language choices, of an implied community, and against the backdrop of the BBC's commitment to impartiality in its Editorial Guidelines, the article identifies numerous recent examples where the choice of words and identifiers can be seen as undermining the BBC's impartiality and which show several of its senior journalists adopting the first-person plural “we” when reporting on matters of public policy. The findings therefore indicate a general need to codify norms which are seen to integrate the need for accuracy as well as impartiality, and for these norms to take into account issues which might at first glance seem to be inconsequential, micro-level features of the journalists’ language. The evidence suggests that more fine-grained guidelines on permissible circumstances for BBC journalists’ usage of “we” and “our” need revising and disseminating in the light of these findings.     

Transnational Media Management: Western News Organizations’ Web Operations in China

In 2008, China surpassed the United States as the largest Internet market in the world. This study examines how four prominent Western news organizations respond to this new era of Internet publishing. A series of in-depth interviews with senior managers at The Wall Street Journal, Financial Times, Reuters, and The New York Times revealed how these news organizations serve Internet users in China through their Chinese-language Web editions—how they overcome geographic, language, cultural, and political barriers to explore this remote market. These cases demonstrate the viability of different operating models and the challenges and opportunities facing these media organizations as they manage transnational news operations in this seemingly lucrative market.     

Television fiction and online communities: an analysis of comments on social networks and forums made by female viewers

This article analyzes the feeling of communities of female social viewers who watch television fiction and participate in social networks and forums dedicated to the programs. The sample is made up of 7,849 comments from 157 platforms (49 Facebook pages, 71 Twitter accounts, and 37 forums). We describe the characteristics of these communities of fans, which differ significantly from cult fandoms and are based on ICT interweaving between reception and female viewers’ daily lives. The results reveal that these active online poster and lurker communities express themselves through their emotional ties with the television series, self-reflection, and the manifestation of intimacy. Identification with the group is based on the relationship of the storylines with their own lives, with no attempts at constructing a cultural or political identity.     

Science and the Ideals of Liberal Education

This article examines the influence of mathematics and science on theformation of culture. It then examines several definitions of liberaleducation, including the notion that languages and fields of study constitutethe substrate of articulate intelligence. Finally, it examines the linkagesbetween science, scientific culture, liberal education, and democracy, andproposes that science cannot be taught merely as a body of facts andtheories, but must be presented to students as integral with culturalstudies. The use of a contextualist approach to science education isrecommended.     

Transforming U.S. higher education: An organizational perspective

Scholarly work on organizational change within colleges and universities is relatively unknown among campus administrators and policy makers. To counter that low visibility, this essay reviews existing theories and research evidence on the topic. The goal is to provide some general guidelines for those who seek to refine purposes, develop programs, and improve effectiveness and efficiency on their campuses.James C. Hearn is Professor of Higher Education at the Institute of Higher Education at the University of Georgia. He has his A.B. from Duke University and M.A. in Sociology and Ph.D. in the Sociology of Education from Stanford University. A former policy analyst and college administrator, his teaching and research focus on postsecondary organization and policy. Currently he is examining connections between institutional governance and the changing demography of university faculty.An earlier version of this article was first presented at the conference on Justice, Participation, and Sustainability in Higher Education, University of LaVerne, LaVerne, CA, September 17, 1994.