1,720,994 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
Urban mobility and online data for the study of vector borne diseases in Delhi (India) and Bangkok (Thailand)
No full textDes maladies vectorielles émergentes, comme la dengue, aggravent les crises de santé publique dans les mégapoles asiatiques de Bangkok (Thaïlande) et Delhi (Inde). Les liens entre les moustiques et l’environnement urbain ont été documentés mais la compréhension des mobilités humaines, en tant qu’élément primordial de diffusion des virus, reste un objet de recherche d'intérêt général à développer.En l'absence de données institutionnelles adaptées, notre recherche s'est d'abord orientée vers des enquêtes de terrain, puis sur la collecte, le traitement, la comparaison et la critique de données provenant d'acteurs majeurs d'Internet (Twitter, Facebook, Google, Microsoft). Leur potentiel varie selon les zones géographiques, mais elles permettent d'éclairer l'organisation et la structure des villes étudiées. De plus, elles font ressortir les temporalités et les interactions intra-urbaines. Toutefois, il semble encore difficilement envisageable de se passer de connaissances acquises in situ. En utilisant le concept d'espace d'activité, nous proposons une méthode permettant de produire des agendas individuels synthétiques, générés à partir de données Twitter et d'enquêtes de terrains. Il s'agit là d'une première étape dans l'élaboration d'un modèle de mobilité individu-centré à base d'agents.Emerging vector-borne diseases such as dengue intensify public health crises in the Asian megacities of Bangkok (Thailand) and Delhi (India). The links between mosquitoes and the urban environment are well documented, but our understanding of human movement, as a key element of virus spreading, has yet to be fully explored as a research subject. Given the paucity in adequate or available institutional data, our research first focused on field surveys, and then on the collection, comparison and critique of data collected from major Internet platforms (Twitter, Facebook, Google, Microsoft). Their potential varies from one geographical area to another, still they shed light on the organization and structure of the studied cities. Moreover, they highlight intra-urban interactions and timeframes. However, carrying out such studies without knowledge acquired from the field seems unadapted. Using the concept of activity space, we propose a method to produce individual synthetic agendas, generated from Twitter data and field surveys. This is a first step in the development of an agent-based model of individual mobility
MO3 Prix du meilleur Papier 2017
No full textNotre article Spatial discontinuities, health and mobility. Analyses and typologies of the Google POIs and Tweets to characterize spatial structures and attractiveness dynamics in Bangkok (Thailand) prochainement publié dans la RIG (International review of Geomatic), a obtenu le prix du meilleur papier 2017 à l'occasion de la conférence SAGéo. Bravo aux auteurs Cebeillac Alexandre, Daudé Éric, Vaguet Alain
Urban Mobility and Dengue in Delhi and Bangkok : What can we learn from online data ?
No full textInternational audienceEmerging vector-borne diseases such as dengue intensify public health crises in the Asian mega cities of Bangkok (Thailand) and Delhi (India). The links between mosquitoes and the urban environment are well documented, but our understanding of human movement, as a key element of virus spreading, has yet to be fully explored as a research subject. Given the paucity inadequate or available institutional data, our research first focused on field surveys, and then on the collection, comparison and critique of data collected from major Internet platforms (Twitter, Facebook, Google, Microsoft). Their potential varies from one geographical area to another, still they shed light on the organisation and structure of the studied cities. Moreover, they highlight intra-urban interactions and time frames. However, such studies cannot be carried out without knowledge acquired from the field. Using the concept of activity space, we propose a method that uses Twitter data and field surveys to model the daily schedules of individuals, thus offering insights into mobility patterns. This is a first step in the development of an agent-based model of individual mobility
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
Des satellites, des réseaux sociaux et des moustiques : Différentes facettes de la géographie de la santé
No full textInternational audienc
Mobilités urbaines et données en ligne pour l'étude des maladies vectorielles à Delhi (Inde) et Bangkok (Thaïlande)
Full text linkEmerging vector-borne diseases such as dengue intensify public health crises in the Asian megacities of Bangkok (Thailand) and Delhi (India). The links between mosquitoes and the urban environment are well documented, but our understanding of human movement, as a key element of virus spreading, has yet to be fully explored as a research subject. Given the paucity in adequate or available institutional data, our research first focused on field surveys, and then on the collection, comparison and critique of data collected from major Internet platforms (Twitter, Facebook, Google, Microsoft). Their potential varies from one geographical area to another, still they shed light on the organization and structure of the studied cities. Moreover, they highlight intra-urban interactions and timeframes. However, carrying out such studies without knowledge acquired from the field seems unadapted. Using the concept of activity space, we propose a method to produce individual synthetic agendas, generated from Twitter data and field surveys. This is a first step in the development of an agent-based model of individual mobility.Des maladies vectorielles émergentes, comme la dengue, aggravent les crises de santé publique dans les mégapoles asiatiques de Bangkok (Thaïlande) et Delhi (Inde). Les liens entre les moustiques et l’environnement urbain ont été documentés mais la compréhension des mobilités humaines, en tant qu’élément primordial de diffusion des virus, reste un objet de recherche d'intérêt général à développer.En l'absence de données institutionnelles adaptées, notre recherche s'est d'abord orientée vers des enquêtes de terrain, puis sur la collecte, le traitement, la comparaison et la critique de données provenant d'acteurs majeurs d'Internet (Twitter, Facebook, Google, Microsoft). Leur potentiel varie selon les zones géographiques, mais elles permettent d'éclairer l'organisation et la structure des villes étudiées. De plus, elles font ressortir les temporalités et les interactions intra-urbaines. Toutefois, il semble encore difficilement envisageable de se passer de connaissances acquises in situ. En utilisant le concept d'espace d'activité, nous proposons une méthode permettant de produire des agendas individuels synthétiques, générés à partir de données Twitter et d'enquêtes de terrains. Il s'agit là d'une première étape dans l'élaboration d'un modèle de mobilité individu-centré à base d'agents
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
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