| |  | Caldarelli, Guido | Folksonomies and clustering in the collaborative system CiteULike read moreAbstract: We analyze CiteULike, an online collaborative tagging system where users bookmark and annotate scientific papers. Such a system can be naturally represented as a tripartite graph whose nodes represent papers, users and tags connected by individual tag assignments. The semantics of tags is studied here, in order to uncover the hidden relationships between tags. We find that the clustering coefficient reflects the semantical patterns among tags, providing useful ideas for the designing of more efficient methods of data classification and spam detection. | 2007 |
| | | Isenberg, Petra | Interactive Tree Comparison for Co-located Collaborative Information Visualization read moreAbstract: In many domains, increased collaboration has lead to more innovation by fostering the sharing of knowledge, skills, and ideas. Shared analysis of information visualizations does not only lead to increased information processing power, but team members can also share, negotiate, and discuss their views and interpretations on a dataset and contribute unique perspectives on a given problem. Designing technologies to support collaboration around information visualizations poses special challenges and relatively few systems have been designed. We focus on suppor ting small groups collaborating around information visualizations in a co-located setting, using a shared interactive tabletop display. We introduce an analysis of challenges and requirements for the design of co-located collaborative information visualization systems. We then present a new system that facilitates hierarchical data comparison tasks for this type of collaborative work. Our system supports multi-user input, shared and individual views on the hierarchical data visualization, flexible use of representations, and flexible workspace organization to facilitate group work around visualizations. | 2007 |
| | | Weaver, Chris | Is Coordination a Means to Collaboration? read moreAbstract: Conceptualizing the interactive structure of visualization tools is critical for successful exploration and analysis. As the prominence of multiple coordinated views in visualization increases, better understanding of coordination becomes more and more important for developing improved coordination models that lead to farther reaching applications of coordination. This paper describes how metavisual exploration and analysis of coordination structure and view layout in DEVise visualizations evolved from hand-drawn diagrams to custom-coded software to two Improvise visualizations. The coordination and visual abstraction models implemented in Improvise can be clearly traced back to earlier models implemented in DEVise. | 2007 |
| | | Gangemi, Aldo | C-ODO: an OWL meta-model for collaborative ontology design read moreAbstract: Sorry no abstract available for this article | 2007 |
| | | Auer, S. | OntoWiki – A Tool for Social, Semantic Collaboration read moreAbstract: We present OntoWiki, a tool providing support for agile, distributed knowledge engineering scenarios. OntoWiki facilitates the visual presentation of a knowledge base as an information map, with different views on instance data. It enables intuitive authoring of semantic content, with an inline editing mode for editing RDF content, similar to WYSIWYG for text documents. It fosters social collaboration aspects by keeping track of changes, allowing to comment and discuss every single part of a knowledge base, enabling to rate and measure the popularity of content and honoring the activity of users. Ontowiki enhances the browsing and retrieval by offering semantic enhanced search strategies. All these techniques are applied with the ultimate goal of decreasing the entrance barrier for projects and domain experts to collaborate using semantic technologies. In the spirit of the Web 2.0 OntoWiki implements an â€architecture of participation†that allows users to add value to the application as they use it. It is available as open-source software and a demonstration platform can be accessed at http://3ba.se. | 2006 |
| | | Newman, M. E. | The structure of scientific collaboration networks read moreAbstract: We investigate the structure of scientific collaboration networks. We consider two scientists to be connected if they have authored a paper together, and construct explicit networks of such connections using data drawn from a number of databases, including MEDLINE (biomedical research), the Los Alamos e-Print Archive (physics), and NCSTRL (computer science). We show that these collaboration networks form small worlds in which randomly chosen pairs of scientists are typically separated by only a short path of intermediate acquaintances. We further give results for mean and distribution of numbers of collaborators of authors, demonstrate the presence of clustering in the networks, and highlight a number of apparent differences in the patterns of collaboration between the fields studied. | 2000 |
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