1,721,057 research outputs found
una psicologia positiva a scuola: estinguere problemi, rinforzare benessere usando il modello Qualità della vita e modello AAMR
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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
Hétérogénéité des générations et âge extrême de la vie
No full textBarbi Elisabetta, Caselli Graziella, Vallin Jacques.- Trajectories of Extreme Survival in Heterogeneous Populations Recent gains in life expectancy among the elderly have noticeably contributed to increasing average life expectancy in developed countries. The old and oldest old are reaching thresholds that were unthinkable 30 or 40 years ago. Are recent gains due to increased longevity among a growing proportion of the population? Or are such gains the harbinger of new frontiers that may announce the further "extension" of the survival curve? Deeper comprehension of underlying mechanisms hinges on models that consider the impact of heterogeneity in individual frailty. In this paper, we analyse the mortality trajectories of French women born between 1820 and 1879. We applied a classic frailty model and a mixture frailty model accounting for individual differences both in the level of mortality and in the rate of aging. The survival trajectories obtained with these models were used to estimate the maximum life span. Moreover, a non- parametric approach was applied to female centenarians born in France between 1 870 and 1 879 to estimate the extreme age at death. Results confirm that population heterogeneity can be an important factor in the dynamics of mortality at the oldest ages. In particular, the mixture frailty model may fit the data better and estimate the possible maximum life span more accurately. A tendency towards an increasing human life span clearly emerges, without however establishing whether a limit in fact exists.Barbi Elisabetta, Caselli Graziella, Vallin Jacques.- Hétérogénéité des générations et âge extrême de la vie Les gains récents d'espérance de vie pour les personnes âgées ont considérablement contribué à l'augmentation de l'espérance de vie dans les pays développés. Les personnes âgées et très âgées atteignent des âges qui étaient inimaginables il y a 30 ou 40 ans. Ces progrès d'espérance de vie sont-ils dus à l'augmentation de la longévité d'une part croissante de la population? Ou bien s'agit-il des signes avant-coureurs de nouveaux sommets qui pourraient annoncer une « extension » de la courbe de survie ? Pour mieux comprendre les mécanismes enjeu, on doit faire appel à des modèles qui prennent en considération l'hétérogénéité de la fragilité individuelle. Nous analysons ici les trajectoires de mortalité de femmes françaises nées entre 1820 et 1879. Nous appliquons un modèle de fragilité classique et un modèle de fragilité combiné permettant de tenir compte des différences individuelles à la fois pour le niveau de mortalité et pour le rythme de vieillissement. Avec les trajectoires de survie ainsi obtenues, nous avons tenté d'estimer la durée de vie maximale. De plus, une approche non paramétrique a été appliquée aux femmes centenaires nées en France entre 1870 et 1879, afin d'estimer l'âge extrême au décès. Les résultats confirment que l'hétérogénéité de la population est sans doute un facteur important des dynamiques de la mortalité aux très grands âges. En particulier, le modèle de fragilité combiné pourrait permettre une meilleure adéquation avec les données et une plus grande précision de l'estimation de la durée de vie maximale. Nous voyons clairement émerger une tendance à l'augmentation de la durée de vie, sans que l'on puisse cependant établir l'existence ou non d'une limite.Barbi Elisabetta, Caselli Graziella, Vallin Jacques.- Trayectorias de supervivencia limite en poblaciones heterogéneas El aumento de la esperanza de vida de las personas mayores ha contribuido de forma significativa al aumento de la esperanza de vida total en los parses desarrollados. Las personas mayores y las muy mayores están alcanzando limites de edad impensables háce 30 о 40 aňos. iSe deben estos aumentos a una mayor longevidad de una proporción creciente de la población o son, рог el contrario, el presagio de nuevas fronteras, que indicarian una "extension" de la curva de supervivencia? Para entender mejor las causas del fenómeno hay que recurrir a rao- delos que tienen en cuenta el impacto de la heterogeneidad en el nivel de vulnerabilidad de los individuos. En este articulo analizamos las trayectorias de mortalidad de las mujeres francesas na- cidas entre 1820 y 1879. Aphcamos el modelo de vulnerabilidad clásico y una combinación del modelo de vulnerabilidad teniendo en cuenta diferencias individuales del nivel de mortalidad y del ritmo de envejecimiento. Utilizamos las trayectorias de supervivencia que se ob- tienen con estos modelos para estimar la duración maxima de vida Aphcamos, además, un modelo no paramétrico a las mujeres centenarias nacidas en Francia entre 1870 y 1879 para estimar la edad limite de defunción. Los resultados confirman que la heterogeneidad pobla- cional puede ser un factor importante en la dinámica de la mortalidad en edades avanzadas. El modelo de vulnerabilidad combinado se adapta mejor a los datos y permite estimar la duración maxima de vida posible con mayor precision. La tendencia al aumento de la duración de vida aparece claramente, pero no se puede determinar si existe un limite de supervivencia.Barbi Elisabetta, Caselli G., Vallin Jacques. Hétérogénéité des générations et âge extrême de la vie. In: Population, 58ᵉ année, n°1, 2003. pp. 45-68
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
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