1,721,009 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
Structuration des communautés benthiques et démersales des habitats subtidaux rocheux tempérés : Une approche multi-échelle des paysages sous-marins au sein des gradients environnementaux de la Baie de Saint-Malo
No full textTemperate coastal rocky reefs are both rich and productive environments that play functional roles essential to the functioning of coastal marine environments. The analysis of the descriptive variables of the composition of the seascape patches structuring the biocenoses at several reference scales constitutes an essential knowledge base in the context of the ecology of the conservation of these environments. In this thesis, we study the potential of the photogrammetric tool to describe the circalittoral benthic habitats (biotopes and associated biocenoses) according to a multi-scale approach, from the micro-habitat (scale of 0.1 m²) to the scale of the bay of Saint-Malo (250 km², North Brittany, France). This study is carried out on 3 rocky reefs located in contrasting hydrodynamic environments. According to 2 separate bathymetric levels (8 m and 13 m corrected from tide level), the photogrammetric models produced made it possible to describe the geomorphology (e.g. slope, aspect and curvature) of the substrate, as well as to map the substrate (120 m², resolution of 1cm). A total of 9 typological classes could be discriminated (80% accuracy) allowing to measure different landscape descriptors (e.g. size, diversity and distance between patches) and to characterize the differences between the 3 sites. A method of virtual quadrat projection within photogrammetric models and points within quadrats is developed in order to characterize benthic communities using a morphotypic approach (CATAMI). The method developed made it possible to obtain a good completeness of the morphotypes present (70% of the real morphotypic richness), and to correctly estimate the proportion of the different morphotypes identified ( 120 m²; inter-site difference and depth) explain up to 24% and 56% of the variability in descriptive metrics of benthos and fish assemblages respectively. The addition of geomorphological and seascape descriptors of the substrate (and the benthos for fish) described locally ( 120 m²; différence inter-site et profondeur) expliquent jusqu’à 24% et 56% de la variabilité des métriques descriptives du benthos et des peuplements de poissons respectivement. L’ajout des descripteurs géomorphologiques et paysagers du substrat (et du benthos pour les poissons) décrit localement (< 120 m²) et finement (1 cm de résolution) apporte jusqu’à 24% et 42% d’explication respectivement pour le benthos et les peuplements de poissons. Cette étude fournit des outils méthodologiques performants et innovants pour la description et la cartographie des habitats benthiques, ainsi que des métriques pertinentes pour l’élaboration de modèles prédictifs de la diversité des habitats circalittoraux rocheux tempérés
Structuration des communautés benthiques et démersales des habitats subtidaux rocheux tempérés : Une approche multi-échelle des paysages sous-marins au sein des gradients environnementaux de la Baie de Saint-Malo
No full textTemperate coastal rocky reefs are both rich and productive environments that play functional roles essential to the functioning of coastal marine environments. The analysis of the descriptive variables of the composition of the seascape patches structuring the biocenoses at several reference scales constitutes an essential knowledge base in the context of the ecology of the conservation of these environments. In this thesis, we study the potential of the photogrammetric tool to describe the circalittoral benthic habitats (biotopes and associated biocenoses) according to a multi-scale approach, from the micro-habitat (scale of 0.1 m²) to the scale of the bay of Saint-Malo (250 km², North Brittany, France). This study is carried out on 3 rocky reefs located in contrasting hydrodynamic environments. According to 2 separate bathymetric levels (8 m and 13 m corrected from tide level), the photogrammetric models produced made it possible to describe the geomorphology (e.g. slope, aspect and curvature) of the substrate, as well as to map the substrate (120 m², resolution of 1cm). A total of 9 typological classes could be discriminated (80% accuracy) allowing to measure different landscape descriptors (e.g. size, diversity and distance between patches) and to characterize the differences between the 3 sites. A method of virtual quadrat projection within photogrammetric models and points within quadrats is developed in order to characterize benthic communities using a morphotypic approach (CATAMI). The method developed made it possible to obtain a good completeness of the morphotypes present (70% of the real morphotypic richness), and to correctly estimate the proportion of the different morphotypes identified ( 120 m²; inter-site difference and depth) explain up to 24% and 56% of the variability in descriptive metrics of benthos and fish assemblages respectively. The addition of geomorphological and seascape descriptors of the substrate (and the benthos for fish) described locally ( 120 m²; différence inter-site et profondeur) expliquent jusqu’à 24% et 56% de la variabilité des métriques descriptives du benthos et des peuplements de poissons respectivement. L’ajout des descripteurs géomorphologiques et paysagers du substrat (et du benthos pour les poissons) décrit localement (< 120 m²) et finement (1 cm de résolution) apporte jusqu’à 24% et 42% d’explication respectivement pour le benthos et les peuplements de poissons. Cette étude fournit des outils méthodologiques performants et innovants pour la description et la cartographie des habitats benthiques, ainsi que des métriques pertinentes pour l’élaboration de modèles prédictifs de la diversité des habitats circalittoraux rocheux tempérés
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
Structuration des communautés benthiques et démersales des habitats subtidaux rocheux tempérés : Une approche multi-échelle des paysages sous-marins au sein des gradients environnementaux de la Baie de Saint-Malo
No full textTemperate coastal rocky reefs are both rich and productive environments that play functional roles essential to the functioning of coastal marine environments. The analysis of the descriptive variables of the composition of the seascape patches structuring the biocenoses at several reference scales constitutes an essential knowledge base in the context of the ecology of the conservation of these environments. In this thesis, we study the potential of the photogrammetric tool to describe the circalittoral benthic habitats (biotopes and associated biocenoses) according to a multi-scale approach, from the micro-habitat (scale of 0.1 m²) to the scale of the bay of Saint-Malo (250 km², North Brittany, France). This study is carried out on 3 rocky reefs located in contrasting hydrodynamic environments. According to 2 separate bathymetric levels (8 m and 13 m corrected from tide level), the photogrammetric models produced made it possible to describe the geomorphology (e.g. slope, aspect and curvature) of the substrate, as well as to map the substrate (120 m², resolution of 1cm). A total of 9 typological classes could be discriminated (80% accuracy) allowing to measure different landscape descriptors (e.g. size, diversity and distance between patches) and to characterize the differences between the 3 sites. A method of virtual quadrat projection within photogrammetric models and points within quadrats is developed in order to characterize benthic communities using a morphotypic approach (CATAMI). The method developed made it possible to obtain a good completeness of the morphotypes present (70% of the real morphotypic richness), and to correctly estimate the proportion of the different morphotypes identified ( 120 m²; inter-site difference and depth) explain up to 24% and 56% of the variability in descriptive metrics of benthos and fish assemblages respectively. The addition of geomorphological and seascape descriptors of the substrate (and the benthos for fish) described locally ( 120 m²; différence inter-site et profondeur) expliquent jusqu’à 24% et 56% de la variabilité des métriques descriptives du benthos et des peuplements de poissons respectivement. L’ajout des descripteurs géomorphologiques et paysagers du substrat (et du benthos pour les poissons) décrit localement (< 120 m²) et finement (1 cm de résolution) apporte jusqu’à 24% et 42% d’explication respectivement pour le benthos et les peuplements de poissons. Cette étude fournit des outils méthodologiques performants et innovants pour la description et la cartographie des habitats benthiques, ainsi que des métriques pertinentes pour l’élaboration de modèles prédictifs de la diversité des habitats circalittoraux rocheux tempérés
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
- …
