1,720,961 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
Learning and Optimization of the Locomotion with an Exoskeleton for Paraplegic People
No full textCette thèse contribue à améliorer la planification de trajectoires et le contrôle des robots bipèdes. Le but concret est de permettre aux paraplégiques de remarcher de façon autonome avec l’exosquelette de membres inférieurs Atalante. Notre approche combine les méthodes issues l’apprentissage automatique et de la robotique traditionnelle. Nous mettons d’abord de côté le contrôle. L’objectif est de permettre la planification de trajectoires en ligne tout en garantissant un fonctionnement sûr. C’est une étape cruciale vers la navigation en milieu incertain et la prise en compte des préférences utilisateur. Nous entraînons ensuite un contrôleur par renforcement afin de généraliser un ensemble prédéfini de mouvements élémentaires. Nous ne cherchons pas la meilleure performance, mais plutôt la transférabilité et la sécurité. Nous proposons une formulation qui apparente à l’apprentissage par imitation mais laisse suffisamment de marge de manœuvre pour affronter des événements inattendus.This thesis contributes to improving the motion planning and control of biped robots. Our concrete goal is restoring natural locomotion for paraplegic people in their daily lives using the medical lower-limb exoskeleton Atalante, notably walkingsafely and autonomously without crutches. The core idea is to combine traditional robotics and state-of-the-art machine learning. We put aside closed-loop control to focus on planning at first. The objective is to enable online trajectory planning while ensuring safe operation. This is a milestone toward realizing versatile navigation in an unstructured environment and accommodating the user preferences. Second, we train a policy using reinforcement learning to generalize a predefined set of primitive motions. We do not seek the best possible performance, but rather transferability and safety. We propose a formulation closely related to imitation learning while giving enough leeway to deal with unexpected events
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
Apprentissage et Optimisation de la Locomotion pour un Exosquelette à destination des Patients Paraplégiques
No full textThis thesis contributes to improving the motion planning and control of biped robots. Our concrete goal is restoring natural locomotion for paraplegic people in their daily lives using the medical lower-limb exoskeleton Atalante, notably walkingsafely and autonomously without crutches. The core idea is to combine traditional robotics and state-of-the-art machine learning. We put aside closed-loop control to focus on planning at first. The objective is to enable online trajectory planning while ensuring safe operation. This is a milestone toward realizing versatile navigation in an unstructured environment and accommodating the user preferences. Second, we train a policy using reinforcement learning to generalize a predefined set of primitive motions. We do not seek the best possible performance, but rather transferability and safety. We propose a formulation closely related to imitation learning while giving enough leeway to deal with unexpected events.Cette thèse contribue à améliorer la planification de trajectoires et le contrôle des robots bipèdes. Le but concret est de permettre aux paraplégiques de remarcher de façon autonome avec l’exosquelette de membres inférieurs Atalante. Notre approche combine les méthodes issues l’apprentissage automatique et de la robotique traditionnelle. Nous mettons d’abord de côté le contrôle. L’objectif est de permettre la planification de trajectoires en ligne tout en garantissant un fonctionnement sûr. C’est une étape cruciale vers la navigation en milieu incertain et la prise en compte des préférences utilisateur. Nous entraînons ensuite un contrôleur par renforcement afin de généraliser un ensemble prédéfini de mouvements élémentaires. Nous ne cherchons pas la meilleure performance, mais plutôt la transférabilité et la sécurité. Nous proposons une formulation qui apparente à l’apprentissage par imitation mais laisse suffisamment de marge de manœuvre pour affronter des événements inattendus
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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