1,721,065 research outputs found
Automated context-driven composition of pervasive services to alleviate non-functional concerns
No full textAbstract — Service-oriented computing is a new emerging computing paradigm that changes the way applications are designed, implemented and consumed in a ubiquitous computing environment. In such environments computing is pushed away from the traditional desktop to small embedded and networked computing devices around us. However, developing mobile and pervasive services for a broad range of systems with different capabilities and limitations while ensuring its users a minimum quality of service is a daunting task. The core contribution of this paper is a context-driven composition infrastructure to create an instantiation of a pervasive service customized to the preferences of the user and to the capabilities of his device. We implement services as a composition of components. This enables us to compose a service implementation targeted at a specific device while still being able to adapt it at run-time to respond to changing working conditions. I
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
An Audit of Facebook's Political Ad Policy Enforcement
No full textWe thank the anonymous reviewers and our shepherd Mainack Mondal for their valuable feedback. We also thank Davy Preuveneers for help with the classification metrics. Victor Le Pochat holds a PhD Fellowship of the Research Foundation Flanders -FWO (11A3421N). This research is partially funded by the Research Fund KU Leuven, and by the Flemish Research Programme Cybersecurity. Cybersecurity for Democracy at NYU's Center for Cybersecurity has been supported by Democracy Fund, Luminate, Media Democracy Fund, the National Science Foundation under grant 1814816, Reset, and Wellspring. This material is based upon work supported by the Google Cloud Research Credits program
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Towards context-aware and resource-driven self-adaptation for mobile handheld applications
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