1,720,972 research outputs found
Efficient Management of Resources and Entities using the HyVonNe P2P Architecture
No full textGrid and P2P environments often require to manage a wide number of distributed and mobile entities. In this paper we present a scalable partitioning technique of the entity space, based on Voronoi diagrams, that is well-suited for distributed applications with dynamically changing topology. In HyVonNe (Hybrid Voronoi Network) architecture, the entity space is partitioned in Voronoi regions, each one including a limited number of entities and managed by a Region Leader. Regions are created and deleted depending on the spatial density of entities and the resulting Overlay Network is used to support routing and searching activities. This two-layered structure (entity space and Voronoi regions) is scalable, extendable, and allows to reduce the propagation of the entity position updates in the network and to maintain the load balancing among regions. The fault tolerance features of HyVonNe are studied as well, simulating two different applications in Grid and P2P environments
Quality of Service on Grid: Architectural and methodological issues
No full textIn ten years of evolution Grid Computing has changed quickly, and the development of new middleware services makes Grid platforms increasingly used not only for best effort large scientific jobs but also in industrial and business applications. This has taken to a growing demand of Quality of Service (QoS) support, strongly driven by the requirements
of the new potential applications. However, the QoS issue on Grid is not easy, as Grid has been originally designed without any QoS support, and it is a complex system. During years some solutions have been proposed to implement, usually over middleware, the
functionalities needed to supply QoS for specific classes of applications. This results in a focused and heterogeneous approach, so that it is hard to evaluate both the sufficiency of the support and its robustness with respect to the large spectrum of possible Grid applications. In this context, our contribution concerns three points: first, we analyze the current approach to QoS on Grid as a relationship among QoS features, applications and
architectures; second, we evaluate the QoS requirements of two recent QoS-demanding applications on Grid, namely Massive Multiplayer Online Games (MMOG) and Urgent Computing, comparing these requirements with the support provided by current QoS architectures; third, as a result of our analysis, we propose some guidelines for an alternative approach to QoS provision on Grid, based on the definition of a dedicated QoS-management layer to overcome the limitation of the current methodologies
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
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
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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