1,720,971 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
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
Methodologies for characterizing the thermal performances of full-scale building walls
No full textEn Europe, le secteur du bâtiment représente plus d’un tiers des émissions de gaz à effet de serre, principalement dues à leurs besoins de chauffage et de climatisation. Ces dernières décennies ont vu apparaître de nouvelles technologies de façades aux comportements thermiques complexes. Leur but est de rendre l’environnement intérieur confortable tout en limitant les besoins énergétiques des bâtiments. La caractérisation thermique de ces façades est donc essentielle afin de garantir leur performance. À cette fin, une nouvelle installation de type « cellule-test » a été utilisée. Cet équipement expérimental permet de tester des façades en conditions climatiques réelles, tout en disposant d’un volume intérieur contrôlé en température et dont les flux sont maîtrisés. L’objectif de la thèse est de mettre au point des méthodologies de caractérisation thermique des façades, à l’échelle du composant et à l’échelle de la cellule-test. À l’échelle du composant, l’étude a porté sur une façade opaque fortement isolée. Ses caractéristiques thermiques ont été estimées à l’aide des mesures de températures intrusives par méthode inverse. Les résultats ont été comparés à une méthode non-intrusive : la méthode normalisée de la moyenne. En plus d’une bonne précision sur l’estimation de la résistance thermique de la paroi, la méthode intrusive a permis d’en estimer la capacité. À l’échelle de la cellule-test, des façades opaque et vitrée ont été étudiées. En complément des mesures expérimentales, un modèle thermo-aéraulique a été développé. Il a aidé à la construction d’une méthodologie qui estime les résistances thermiques d’une façade et des parois de la cellule-test, malgré la forte corrélation de ces paramètres. Cette étude a abouti à la formulation de préconisations pour la réalisation de futurs essais expérimentaux.In Europe, the building sector contributes fort more than one third of greenhouse gas emissions, mainly due to their heating and cooling needs. The last decades have seen the rise of new facade technologies with complex thermal behaviour. Their goal is to make the indoor environment comfortable while minimizing the energy needs of buildings. The thermal characterization of this new kind of facades is therefore crucial to guarantee their performance.To do so, a new "test cell" facility was used. Test cells are facilities typically used to perform experiments under real weather conditions with a wide variety of facades. The objective of this PhD thesis is to develop a methodology for the thermal characterization of facades, both at the component and at the test cell scales. At the component scale, the study focused on a highly insulated opaque façade. Its thermal characteristics were estimated using intrusive temperature measurements by inverse method. The results were compared to the standard non-intrusive method, known as the average method. The intrusive method was able to estimate its capacity in addition to good accuracy on the thermal resistance estimation. At the test cell scale, an opaque wall and a glazed facade were studied. A coupled heat and airflow model was developed. It helped the conception of a methodology that estimates the thermal resistances of a façade and the walls of the test cell, despite the high correlation of these parameters. This study allowed to have a more accurate overview of the technical potential of this installation and it led to the definition of guidelines for future experimental works
Méthodologies pour la caractérisation des performances thermiques d’éléments de façades à échelle réelle
No full textIn Europe, the building sector contributes fort more than one third of greenhouse gas emissions, mainly due to their heating and cooling needs. The last decades have seen the rise of new facade technologies with complex thermal behaviour. Their goal is to make the indoor environment comfortable while minimizing the energy needs of buildings. The thermal characterization of this new kind of facades is therefore crucial to guarantee their performance.To do so, a new "test cell" facility was used. Test cells are facilities typically used to perform experiments under real weather conditions with a wide variety of facades. The objective of this PhD thesis is to develop a methodology for the thermal characterization of facades, both at the component and at the test cell scales. At the component scale, the study focused on a highly insulated opaque façade. Its thermal characteristics were estimated using intrusive temperature measurements by inverse method. The results were compared to the standard non-intrusive method, known as the average method. The intrusive method was able to estimate its capacity in addition to good accuracy on the thermal resistance estimation. At the test cell scale, an opaque wall and a glazed facade were studied. A coupled heat and airflow model was developed. It helped the conception of a methodology that estimates the thermal resistances of a façade and the walls of the test cell, despite the high correlation of these parameters. This study allowed to have a more accurate overview of the technical potential of this installation and it led to the definition of guidelines for future experimental works.En Europe, le secteur du bâtiment représente plus d’un tiers des émissions de gaz à effet de serre, principalement dues à leurs besoins de chauffage et de climatisation. Ces dernières décennies ont vu apparaître de nouvelles technologies de façades aux comportements thermiques complexes. Leur but est de rendre l’environnement intérieur confortable tout en limitant les besoins énergétiques des bâtiments. La caractérisation thermique de ces façades est donc essentielle afin de garantir leur performance. À cette fin, une nouvelle installation de type « cellule-test » a été utilisée. Cet équipement expérimental permet de tester des façades en conditions climatiques réelles, tout en disposant d’un volume intérieur contrôlé en température et dont les flux sont maîtrisés. L’objectif de la thèse est de mettre au point des méthodologies de caractérisation thermique des façades, à l’échelle du composant et à l’échelle de la cellule-test. À l’échelle du composant, l’étude a porté sur une façade opaque fortement isolée. Ses caractéristiques thermiques ont été estimées à l’aide des mesures de températures intrusives par méthode inverse. Les résultats ont été comparés à une méthode non-intrusive : la méthode normalisée de la moyenne. En plus d’une bonne précision sur l’estimation de la résistance thermique de la paroi, la méthode intrusive a permis d’en estimer la capacité. À l’échelle de la cellule-test, des façades opaque et vitrée ont été étudiées. En complément des mesures expérimentales, un modèle thermo-aéraulique a été développé. Il a aidé à la construction d’une méthodologie qui estime les résistances thermiques d’une façade et des parois de la cellule-test, malgré la forte corrélation de ces paramètres. Cette étude a abouti à la formulation de préconisations pour la réalisation de futurs essais expérimentaux
Méthodologies pour la caractérisation des performances thermiques d’éléments de façades à échelle réelle
No full textIn Europe, the building sector contributes fort more than one third of greenhouse gas emissions, mainly due to their heating and cooling needs. The last decades have seen the rise of new facade technologies with complex thermal behaviour. Their goal is to make the indoor environment comfortable while minimizing the energy needs of buildings. The thermal characterization of this new kind of facades is therefore crucial to guarantee their performance.To do so, a new "test cell" facility was used. Test cells are facilities typically used to perform experiments under real weather conditions with a wide variety of facades. The objective of this PhD thesis is to develop a methodology for the thermal characterization of facades, both at the component and at the test cell scales. At the component scale, the study focused on a highly insulated opaque façade. Its thermal characteristics were estimated using intrusive temperature measurements by inverse method. The results were compared to the standard non-intrusive method, known as the average method. The intrusive method was able to estimate its capacity in addition to good accuracy on the thermal resistance estimation. At the test cell scale, an opaque wall and a glazed facade were studied. A coupled heat and airflow model was developed. It helped the conception of a methodology that estimates the thermal resistances of a façade and the walls of the test cell, despite the high correlation of these parameters. This study allowed to have a more accurate overview of the technical potential of this installation and it led to the definition of guidelines for future experimental works.En Europe, le secteur du bâtiment représente plus d’un tiers des émissions de gaz à effet de serre, principalement dues à leurs besoins de chauffage et de climatisation. Ces dernières décennies ont vu apparaître de nouvelles technologies de façades aux comportements thermiques complexes. Leur but est de rendre l’environnement intérieur confortable tout en limitant les besoins énergétiques des bâtiments. La caractérisation thermique de ces façades est donc essentielle afin de garantir leur performance. À cette fin, une nouvelle installation de type « cellule-test » a été utilisée. Cet équipement expérimental permet de tester des façades en conditions climatiques réelles, tout en disposant d’un volume intérieur contrôlé en température et dont les flux sont maîtrisés. L’objectif de la thèse est de mettre au point des méthodologies de caractérisation thermique des façades, à l’échelle du composant et à l’échelle de la cellule-test. À l’échelle du composant, l’étude a porté sur une façade opaque fortement isolée. Ses caractéristiques thermiques ont été estimées à l’aide des mesures de températures intrusives par méthode inverse. Les résultats ont été comparés à une méthode non-intrusive : la méthode normalisée de la moyenne. En plus d’une bonne précision sur l’estimation de la résistance thermique de la paroi, la méthode intrusive a permis d’en estimer la capacité. À l’échelle de la cellule-test, des façades opaque et vitrée ont été étudiées. En complément des mesures expérimentales, un modèle thermo-aéraulique a été développé. Il a aidé à la construction d’une méthodologie qui estime les résistances thermiques d’une façade et des parois de la cellule-test, malgré la forte corrélation de ces paramètres. Cette étude a abouti à la formulation de préconisations pour la réalisation de futurs essais expérimentaux
- …
