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Altmetrics, indices based on social media platforms and tools, have recently emerged as alternative means of measuring scholarly impact. Such indices assume that scholars in fact populate online social environments, and interact with scholarly products in the social web. We tested this assumption by examining the use and coverage of social media… (More)
Traditionally, scholarly impact and visibility have been measured by counting publications and citations in the scholarly literature. However, increasingly scholars are also visible on the Web, establishing presences in a growing variety of social ecosystems. But how wide and established is this presence, and how do measures of social Web impact relate to… (More)
Social tagging is a widespread activity for indexing user-generated content on Web services. This paper summarizes research on folksonomies and their retrieval effectiveness. A TREC-like retrieval test was conducted with tags and resources from the social bookmarking system delicious, which resulted in recall and precision values for tag-only searches.… (More)
The effects of the endogenous, platelet-derived vasoactive compounds, diadenosine tetraphosphate (AP4A), diadenosine pentaphosphate (AP5A), and diadenosine hexaphosphate (AP6A) on the vasoconstriction of isolated rat renal resistance vessels and rat aortic strips were measured using a vessel myograph. In addition, the effects of AP4A, AP5A, and AP6A on the… (More)
In this paper we describe our emotional search engine and a multi-layered approach to an incentive system, incorporating concepts of role-playing games and gaming platforms with the purpose of motivating users to become active parts of the community and provide the necessary emotional tagging for our search engine.
Research shows that in broad folksonomies the shape of document-specific tag distributions remains stable after a certain point in time and that it is not influenced by increasing numbers of tags or taggers. The question under which particular conditions tag distributions become stable is not well discussed yet. The paper presents an approach for… (More)