1,721,009 research outputs found
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
Un point de vue unifié sur la diagnosticabilité
No full textThe problem of model-based fault diagnosis in complex systems has received an increasing interest over the past decades. Experience has proved that it needs to be taken into account during the system design stage, by means of diagnosability analysis. Diagnosability is the ability of a system to exhibit different symptoms for a set of anticipated fault situations. Several approaches for diagnosability have been developed using different modelling formalisms., yet the reasoning for diagnosability analysis is very similar in all these approaches. This thesis provides a comparison of these and a unified definition of diagnosability. An original approach for diagnosability analysis, based on partial fault modes, is described. It is implemented in the context of service oriented architecture, more precisely on web services, and benefited from the framework of the european project WS-DIAMOND. An original generalization of the definition of diagnosability to any set of system states is presented, that accounts for many kinds of properties, like repair preconditions or quality of service. This work opens perspectives for model independent diagnosability reasoning, diagnosability based on other types of models, and in integrating diagnosis into a general purpose supervision tool. Model-based diagnosis and diagnosability of software systems is still a young applicative domain, and opens many connections with the software safety engineering domain.Le problème du diagnostic de défaillance à base de modèle dans les systèmes complexes a reçu un intérêt croissant durant les dernières décennies. Ce problème doit être pris en compte dès la phase de conception du système, au moyen de l'analyse de la diagnosticabilité. La diagnosticabilité est la capacité d'un système à exhiber des symptômes différents pour un ensemble de situations de défaillances anticipées. Plusieurs approches ont été développées basées sur différents formalismes de modélisation, toutefois les raisonnements menant à la diagnosticabilité sont très semblables dans toutes ces approches. Cette thèse développe une comparaison des approches existantes et établit une définition unifiée de la diagnosticabilité. Une nouvelle approche pour l'analyse de diagnosticabilité, basée sur les modes de faute partiels, est décrite. Elle est implémentée dans le contexte des architectures orientées services, plus précisément sur des web service, et bénéficia du cadre du projet européen WS-DIAMOND. Une nouvelle généralisation de la définition de la diagnosticabilité à n'importe quel ensemble d'état est présentée, qui permet de prendre en compte de nouveaux types de propriétés, comme les préconditions de réparation, ou la qualité de service. Ces travaux ouvrent des perspectives pour le raisonnement de diagnosticabilité indépendant du modèle, pour la diagnosticabilité basée sur d'autres types de modèles, ainsi que pour l'intégration du diagnostic dans un outil de surveillance plus général. Le diagnostic et l'analyse de diagnosticabilité des systèmes logiciels est encore un domaine jeune, et ouvre de nombreuses connections avec le domaine de la sécurité informatique
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
Management of hazards in a multi-robot system
No full textLes systèmes multi-robots se multiplient dans notre quotidien, par exemple dans la robotique de service ou dans l’assistance industrielle ou agricole. Pour rendre ces systèmes autonomes et sûrs, il est indispensable d’embarquer des modules pour gérer automatiquement les pannes, c’est-à-dire la détection d’anomalies, l’évaluation des causes possibles et la décision d’une réaction appropriée (réessayer, remplacer l’action, remplacer un composant, etc). La thèse vise à développer des outils génériques pour construire un module de gestion automatique des pannes, pour analyser ce module et pour valider son comportement. La première ambition est de modéliser le système multi-robots, le raisonnement pour émettre un diagnostic et les propriétés de sûreté requises. Le travail portera ensuite sur les algorithmes pour construire le module de gestion des pannes et l’analyser. Finalement, les outils développés seront validés par l’application à différents scénarios multi-robots réels et simulés.Multi-robot systems multiply in our everyday life, for example in service robotics or industrial or agricultural assistance. To make these systems stand-alone and safe, it is essential to embed modules to automatically manage failures, that is, detecting anomalies, evaluating possible causes and deciding on an appropriate response ( Retry, replace the action, replace a component, etc.). The thesis aims at developing generic tools to construct an automatic fault management module, to analyze this module and to validate its behavior. The first ambition is to model the multi-robot system, the reasoning for making a diagnosis and the required safety properties. The work will then focus on the algorithms to construct the fault management module and analyze it. Finally, the tools developed will be validated by being applied to different real and simulated multi-robot scenarios
Un point de vue unifié sur la diagnosticabilité
No full textThe problem of model-based fault diagnosis in complex systems has received an increasing interest over the past decades. Experience has proved that it needs to be taken into account during the system design stage, by means of diagnosability analysis. Diagnosability is the ability of a system to exhibit different symptoms for a set of anticipated fault situations. Several approaches for diagnosability have been developed using different modelling formalisms., yet the reasoning for diagnosability analysis is very similar in all these approaches. This thesis provides a comparison of these and a unified definition of diagnosability. An original approach for diagnosability analysis, based on partial fault modes, is described. It is implemented in the context of service oriented architecture, more precisely on web services, and benefited from the framework of the european project WS-DIAMOND. An original generalization of the definition of diagnosability to any set of system states is presented, that accounts for many kinds of properties, like repair preconditions or quality of service. This work opens perspectives for model independent diagnosability reasoning, diagnosability based on other types of models, and in integrating diagnosis into a general purpose supervision tool. Model-based diagnosis and diagnosability of software systems is still a young applicative domain, and opens many connections with the software safety engineering domain.Le problème du diagnostic de défaillance à base de modèle dans les systèmes complexes a reçu un intérêt croissant durant les dernières décennies. Ce problème doit être pris en compte dès la phase de conception du système, au moyen de l'analyse de la diagnosticabilité. La diagnosticabilité est la capacité d'un système à exhiber des symptômes différents pour un ensemble de situations de défaillances anticipées. Plusieurs approches ont été développées basées sur différents formalismes de modélisation, toutefois les raisonnements menant à la diagnosticabilité sont très semblables dans toutes ces approches. Cette thèse développe une comparaison des approches existantes et établit une définition unifiée de la diagnosticabilité. Une nouvelle approche pour l'analyse de diagnosticabilité, basée sur les modes de faute partiels, est décrite. Elle est implémentée dans le contexte des architectures orientées services, plus précisément sur des web service, et bénéficia du cadre du projet européen WS-DIAMOND. Une nouvelle généralisation de la définition de la diagnosticabilité à n'importe quel ensemble d'état est présentée, qui permet de prendre en compte de nouveaux types de propriétés, comme les préconditions de réparation, ou la qualité de service. Ces travaux ouvrent des perspectives pour le raisonnement de diagnosticabilité indépendant du modèle, pour la diagnosticabilité basée sur d'autres types de modèles, ainsi que pour l'intégration du diagnostic dans un outil de surveillance plus général. Le diagnostic et l'analyse de diagnosticabilité des systèmes logiciels est encore un domaine jeune, et ouvre de nombreuses connections avec le domaine de la sécurité informatique
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