1,720,998 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
Monitoring and evaluation of the requalification of industrial wasteland as an ecological compensation area : the case of the former oil refinery of Reichstett
No full textLes friches industrielles représentent de réelles opportunités pour la création d’espaces naturels mais les méthodes de restauration et d’évaluation des bénéfices environnementaux de ces opérations sont très lacunaires. L’objectif de cette thèse a été, au travers d’un cas d’étude, de palier à ce manque. Les résultats obtenus mettent en évidence que la restauration des technosols de friches industrielles nécessite une approche pluri-compartimentale (végétation et sol) et que les méthodes utilisées actuellement en restauration des sols sont moins efficaces dans des milieux aussi dégradés. Une approche pluridisciplinaire alliant outils d’évaluation économique et indicateurs écologiques a été ajustée permettant l’évaluation des bénéfices environnementaux de tels projets. Des adaptations sont cependant encore nécessaires dans la récolte de données, la sélection des indicateurs et la conception de la méthode pour garantir une meilleure prise en compte du compartiment sol, optimiser l’intégration des objectifs du projet de restauration et des potentiels impacts de la restauration sur les populations locales.Industrial wastelands represent real opportunities for the creation of natural spaces but the methods of restoration and evaluation of the environmental benefits of these operations are very incomplete. The objective of this thesis was, through a case study, to fill these gaps. The results obtained show that the restoration of technosols of industrial wastelands requires a multi-compartmental approach (vegetation and soil) and that the methods currently used in soil restoration are less effective in such degraded environments. A multidisciplinary approach combining economic evaluation tools and ecological indicators has been adjusted to evaluate the environmental benefits of such projects. However, adaptations are still needed in data collection, indicator selection and method design to improve the consideration of the soil compartment and to optimize the integration of the objectives of the restoration project and the potential impacts of restoration on local populations
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
Study of the impact of ageing upon performances and functionalities of a stormwater constructed wetland : characterization of the plant biodiversity and fate of accumulated sediments in the context of urban water
No full textAfin de limiter les effets néfastes des rejets urbains par temps de pluie (RUTP) sur les socio-écosystèmes en milieu urbain dans un contexte de changement climatique, des techniques alternatives (TA) sont utilisées. À Strasbourg (Grand Est, France), trois TA composées chacune d’une mare de sédimentation et d’un filtre planté de roseaux à écoulement vertical ou horizontal reçoivent depuis 10 ans les RUTP d’un réseau séparatif strict. L’objectif de cette thèse est d’étudier l’impact du vieillissement sur les TA en : (i) évaluant la réponse hydrodynamique, physico-chimique et les performances de dépollution ; (ii) mesurant l’accumulation des sédiments et le stockage des micropolluants ; (iii) étudiant la structure de la phytocénose spontanée et sa valeur ajoutée.Le suivi métrologique permet de conclure sur la robustesse de la TA âgée de 10 ans dont la réponse n’est pas corrélée aux paramètres hydrologiques du bassin versant. Des concentrations inférieures aux limites de quantification en sortie témoignent d’une bonne dépollution des micropolluants (7 métaux et 16 HAP). Le stockage des métaux est important dans les sédiments des mares et localisé sur la couche superficielle dans les filtres verticaux. Les hydrophytes accumulent également des métaux. Les mares sont naturellement colonisées par les plantes du paysage par anémochorie et zoochorie et la végétation joue un rôle support qui participe également à l’efficacité des TA.In order to limit the adverse effects of urban stormwaters on urban socio-ecosystems in a context of climate change, stormwater constructed wetlands (SCW) are used. In Strasbourg (France), three , each composed of a sedimentation pond and a vertical or horizontal flow reed filter, have been receiving stormwater from a separative sewer system for the past 10 years. The objective of this thesis is to study the impact of aging on the SCWs by: (i) evaluating the hydrodynamic, physico-chemical response and depollution performance; (ii) measuring sediment accumulation and micropollutant storage; (iii) studying the structure of the spontaneous phytocenosis and its added value.The metrological monitoring allows us to conclude on the robustness of the 10 year old SCW which response is not correlated to the hydrological parameters of the catchment. Concentrations below the limits of quantification at the outlet indicate good micropollutant removal (7 metals and 16 PAHs). The storage of metals is hight in the sediments of the ponds and localized on the surface layer in the vertical filters. Hydrophytes also accumulate metals. Ponds are naturally colonized by landscape plants by anemochory and zoochory and the vegetation plays a supporting role that also contributes to the efficiency of the SCW
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
Évaluer, restaurer, comprendre : comprendre pour évaluer et restaurer, restaurer et évaluer pour mieux comptrendre
No full textÉcologie-éthologi
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
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