1,721,179 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
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
From the Hillslope to the River : Landscape Structure and Sediment Connectivity in a Vineyard (Beaujolais, France)
No full textL’influence des activités anthropiques sur l’érosion des sols a été largement démontrée en contexte agricole, où les pertes en sol sont considérées comme fortes et impliquent des enjeux économiques et environnementaux déjà bien documentés. Dans ce contexte, la compréhension des transferts sédimentaires au cours d’eau dépend de la structure paysagère, complexe en raison de la multiplicité de l’agencement spatial des occupations du sol et des infrastructures. Le poids de cette dépendance est débattu dans la communauté scientifique. L’objectif de cette thèse est d’évaluer le rôle des éléments qui constituent la structure paysagère (occupation du sol, modes de cultures, infrastructures linéaires de drainage et collecteurs de sédiments) dans les transferts hydro-sédimentaires au cours d’eau. La démarche développée combine métrologie de terrain (2020-2022), analyse spatiale et modélisation de la connectivité sédimentaire. Ce travail se focalise sur le Beaujolais viticole, secteur pertinent du fait de son contexte physique, des modes de cultures propices à une forte production sédimentaire, et des multiples stratégies développées par les agriculteurs·trices pour gérer les flux hydro-sédimentaires. Les résultats ont montré la forte densité et la diversité des infrastructures de drainage. L’organisation du réseau témoigne d’une stratégie de gestion différenciée entre les hauts et bas de versants : le stockage sédimentaire est favorisé sur les hauts tandis que l’export des flux vers le cours d’eau l’est sur les bas. En parallèle, le suivi métrologique a montré un fonctionnement hydro-sédimentaire saccadé. Les précipitations les plus fréquentes n’occasionnent que des réponses modérées et les événements qui permettent l’organisation d’un continuum géomorphologique sont rares (environ 2 fois par an). Les pratiques agricoles limitent la production sédimentaire sur la parcelle grâce à des infrastructures intra-parcellaires. À l’inverse, le réseau de drainage agit comme une extension du réseau hydrographique favorisant les transferts au cours d’eau.The influence of human activities on soil erosion has been proved, especially in agricultural landscapes characterized with high soil loss involving economic and environmental concerns. Landscape structure is considered to be complex therefore understanding sediment transfers requires to integrate it comprehensively. Spatial patterns of land use and land cover, agricultural practices, linear drainage structures and sediment traps are to be documented. This thesis aims to assess the role of these elements in sediment transfers to the river in agricultural landscapes. The approach combines field survey, spatial analysis and connectivity modelling. It focuses on the Beaujolais vineyard (France) where the physical context and the agricultural practices are conducive to soil erosion associated to sediment transfers management strategies. The results highlight the high density and diversity of drainage structures. The drainage network pattern shows a lower connectivity on the upper slopes to favour sediment storage. Conversely, runoff export to the river drives the strategy on the lower slopes. Meanwhile, field survey pointed out jerky sediment transfers. Indeed, most rainfall events result in a moderate reply and only a few events enable a switch on of all the components of the sediment cascade (twice a year). Agricultural practices proved to reduce soil erosion at the plot-scale. On the contrary the drainage network serves as a river extension facilitating sediment transfers to the river
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
Les glissements de terrain du Pays d'Auge continental (Normandie, France) Caractérisation, cartographie, analyse spatiale et modélisation
No full textThe Pays d'Auge plateau hillslopes (Normandy, France) are widely affected by instability processes. In spite of an actual risk, few studies were engaged on these complex phenomena in this smooth topography area. This research aims to complete the limited knowledge about the local instability processes and to develop a landslide susceptibility mapping strategy. Two main objectives are guiding the work: (1) observation and characterization de the instability phenomena (inventory, typology and geomorphological mapping); (2) landslide susceptibility mapping at the 1/50.000 and at the 1/10.000 scale. We obtained a detailed landslide typology for the continental part of the Pays d'Auge plateau. This was used as a basis for several landslides inventories at different scales. Datasets representing the landslide predisposing factors were acquired with a particular attention paid on the quality, the cost and the scale fitting of the data. The work was focused on the comparison between "expert", "semi-expert" and probabilistic approaches to map the landslide susceptibility. The results show that probabilistic approaches can be used complementarily to the usual expert methods and can help in selecting more appropriate landslide predisposing factors, even if the method is widely influenced by the quality of the input data.Les versants du plateau du Pays d'Auge (Normandie, France) sont régulièrement affectés par des phénomènes d'instabilité. En dépit d'un risque avéré, peu de travaux de recherches ont été effectués sur ces phénomènes complexes dans ce secteur à la topographie peu prononcée. Ce travail de recherche vise ainsi à combler le manque de connaissance sur les processus locaux et à proposer des approches permettant d'établir une cartographie préventive. Les objectifs sont concentrés sur deux points majeurs : (1) observation et caractérisation des phénomènes hydro-gravitaires (inventaire, typologie et cartographie géomorphologique) ; (2) cartographie de la susceptibilité aux glissements de terrain à échelle du 1/50.000ème et du 1/10.000ème. Ce travail de thèse a permis d'établir une typologie détaillée des mouvements de versant de la partie continentale du Pays d'Auge. Celle-ci a servi de support de base pour la réalisation d'inventaires des phénomènes à différentes échelles. Plusieurs jeux de données, représentant les facteurs de prédisposition des glissements de terrain ont été acquis, avec une attention particulière portée sur la qualité des données, leur coût et leur adaptation à l'échelle de travail. Le travail s'est focalisé sur la comparaison entre les approches dites "expertes", "semi-expertes" et les approches probabilistes (régression logistique) pour la cartographie de la susceptibilité. Les résultats montrent que les approches probabilistes peuvent être complémentaires avec des approches expertes, constituant une aide dans le choix des facteurs à prendre en compte pour la cartographie, mais restent très largement dépendantes de la qualité des données
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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