1,720,992 research outputs found
Editorial: Fundamentals of luminescence and electroluminescence in particle detection technologies relying on noble-gas media
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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
Exploration du potentiel des technologies Micro-Pattern Gaseous Detectors dans les applications de physique de hautes énergies et au-delà
No full textCette thèse de doctorat étudie le potentiel des Détecteurs Gazeux à Micro-Structures (MPGD) pour la Physique des Hautes Énergies et au-delà, en se concentrant sur les avancées en résolution temporelle et en lecture optique. L'objectif principal est le projet PICOSEC Micromegas, visant à développer des détecteurs gazeux à haute précision avec une résolution temporelle cible de O(10) ps pour les Particules au Minimum d’Ionisation. Cette thèse a porté sur l'amélioration des performances et leur extension vers des modules multi-canaux robustes. Les matériaux des photocathodes ont montré que le carbone type diamant (DLC) était prometteur avec une résolution temporelle de 32 ps et une résistance à l'humidité. L'intégration des Micromegas résistifs a amélioré la robustesse contre les décharges, atteignant une résolution temporelle de 12,5 ps avec une photocathode de iodure de césium (CsI). Des prototypes multi-canaux ont été développés pour des surface de détection plus grandes, avec une résolution temporelle inférieure à 18 ps pour un module de 10x10 cm². Cette thèse explore les avantages des techniques de lecture optique pour les MPGDs et cherche à améliorer leurs performances. Elle évalue la résolution spatiale par lecture optique, compare différentes géométries de détecteurs et étudie diverses configurations de GEM pour améliorer la plage dynamique du MIGDAL OTPC. L'optimisation des gaz pour la lecture optique a aussi été abordée, avec des mélanges alternatifs au CF₄ et des décalages de longueur d'onde.This doctoral dissertation investigates the potential of Micro-Pattern Gaseous Detectors for High Energy Physics and beyond, focusing on time resolution and optical readout advancements. The primary aim was the PICOSEC Micromegas project, concentrating on developing precise-timing gaseous detectors with a target time resolution of O(10) ps for Minimum Ionising Particles. This thesis focused on enhancing performance and scaling it to robust multi-channel detector modules. Research on photocathode materials showed that Diamond-Like Carbon (DLC) was the most promising due to its good time resolution of approximately 32 ps and resistance to humidity. The integration of resistive Micromegas aimed to improve robustness against discharges and ensure stable operation under intense particle beams, achieving a time resolution of approximately 12.5 ps with Cesium Iodide (CsI) photocathode. Finally, multi-channel prototypes were developed to scale to larger detection areas, achieving a time resolution below 18 ps for a 10x10 cm² module. This doctoral dissertation explores the potential benefits of optical readout techniques for MPGDs and aims to enhance their performance. The research included an evaluation of spatial resolution through optical readout, comparing different detector geometries. It investigated various GEM-stack configurations to improve the dynamic range for future modifications of the MIGDAL OTPC, evaluating the maximum achievable gain and light yield across different GEM-based structures. It also recognised the importance of gas optimisation for optical readout by exploring alternative mixtures to CF₄ and wavelength shifters
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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