1,721,059 research outputs found
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Get PDF“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
Get PDFWe 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
Environmental sound event detection from low power wireless sensor network
No full textCes dernières années, le gain d'intérêt pour la détection d'événements sonores et la réduction des coûts de l'électronique ont conduit à s'intéresser au déploiement de dispositifs de détection distribués sur des réseaux de capteurs sans fil. Cependant, la transmission d'informations binaires qu'elle requiert induit à la fois une forte consommation d'énergie et une dégradation des données émises. L'objectif de cette thèse est de travailler sur la minimisation de la consommation d'énergie d'une communication sans fil, et d'analyser l'impact de la transmission des descripteurs sur les performances de la détection. Tout d'abord, nous étudions les différents modèles énergétiques d'une transmission afin d'approcher au mieux la consommation réelle. Nous proposons alors une analyse de l'efficacité spectrale minimisant cette énergie. Dans un second temps, nous étudions la faisabilité d'un dispositif de détection d'événements sonores distribué, avec ses avantages et ses contraintes. Nous introduisons les méthodes utilisées pour coder en virgule fixe les descripteurs audio sur une longueur de quantification limitée. Nous commençons par analyser l'influence de cette quantification sur les performances d'un GMM ou d'un CRNN. Nous étudions finalement l'impact des erreurs de transmission sur cette même détection, et proposons une méthode d'augmentation de données pour le limiter.In recent years, increased interest in sound event detection and reduced electronics cost have led to a focus in the deployment of distributed detection devices on wireless sensor networks. However, the transmission of binary information that it requires induces both high energy consumption and degradation of the transmitted data. This thesis aims to work on minimizing the energy consumption of wireless communication, and to analyse the impact of features transmission on detection performance. First of all, we study the different transmission energy models in order to better approximate the real consumption. We then propose an analysis of the spectral efficiency that minimizes this energy. In a second step, we study the feasibility of a distributed sound event detection system, with its advantages and constraints. We introduce the methods used to fixed-point encode the audio features over a limited quantization length. We start by analyzing the influence of this quantization on the performance of a GMM or CRNN. We finally study the impact of transmission errors on this same detection, and propose a data augmentation method to limit it
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe 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
Design of real-time algorithms for very high speed and elastic optical transponders
No full textCette thèse s’inscrit dans le contexte de la transmission sur fibre optique élastique à très haut débit, se servant du détecteur cohérent et de traitement du signal numérique en chaîne de réception. Trois algorithmes ont été mis en avant. L’ algorithme “joint” qui réalise conjointement les opérations de démultiplexage de polarisation et de compensation du déséquilibre IQ en plus de deux algorithmes de compensation de bruit de phase de laser “MDD-CPR” et “R-BPS”. L’approche “joint” assure l’adaptabilité à une transmission agile. Sa robustesse face à d’autres distorsions (les pertes dépendant de la polarisation, multiplexage dynamique) a été démontrée avec une complexité moindre par rapport à l’approche classique de la littérature “CMA+BASS”. La validation expérimentale de “joint” a été assurée sur des données réelles. D’autre part, “MDD-CPR” est une version modifiée de l’algorithme classique de compensation de phase à décision dirigée dont les performances en simulation et avec les signaux réels ont été testées. Des caractéristiques avantageuses de sa courbe en S par rapport à l’approche classique et de sa robustesse face au bruit de phase soulignent son intérêt. “R-BPS” permet de corriger l’effet du bruit de phase de laser avec un nombre minimal de phase de tests réduisant ainsi sa complexité globale. Ses performances avec traitement parallèle pour divers formats de modulation ont mis en évidence sa capacité d’opération meilleure que le “BPS” avec un coût plus faible.This thesis deals with digital signal processing techniques used in the coherent optical communication systems for high speed and flexible optical transmissions. Three different algorithms have been proposed. The “joint” algorithm performs the polarization demultiplexing and IQ imbalance compensation. Two other carrier phase noise recovery algorithms called “ MDD-CPR ” and “ R-BPS ” were introduced. “joint” approach performs well in the flexible context. Its robustness to other distortions (polarization dependent losses, dynamic multiplexing) has been demonstrated with less complexity compared to classic “CMA + BASS” approach and it was validated experimentally on real data. On the other hand, “MDD-CPR” is a modified version of the classic decision-directed algorithm whose performance in simulation and with real signals has been tested. Advantageous characteristics of its S-curve compared to the conventional approach and its robustness against phase noise underline its interest. "R-BPS" al-lows laser phase noise recovery with a minimum number of test phases. Numerical and experimental parallel processing have demonstrated its ability to operate better than “ BPS ” with lower overall complexity
- …
