1,720,975 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
Demografia d'impresa: l'utilizzo di tecniche di abbinamento per l'analisi della continuità
No full textDispelling 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
Childhood vaccine coverage in Italy after the new law on mandatory immunization
No full textBackground. The Italian National Immunization Prevention Plan (PNPV) identifies vaccines actively offered free of charge to target populations within the National Health Service. Despite this, childhood immuniza- tion coverage has been declining in Italy in recent years. As a response, the Italian Parliament in July 2017 approved law n. 119 extending mandatory childhood vaccines from four to ten, this stimulating a lively debate at both the scientific and policy level.
Methods. We analysed and critically interpreted 2000-2017 Italian national childhood immunization cov- erage trends, by different vaccine, target population, birth cohort and by Region. In particular, in order to preliminarily assess the impact of the new law, we computed percentage changes in 2016-2017 vaccine coverage for both mandatory and recommended vaccine programs. Data were provided by the Directorate General of Health Prevention of the Italian Ministry of Health.
Results. In 2017 national-level vaccine coverage at 24 months of age was 94.5% for Polio and 91.7% for Measles, this representing, respectively 1.2% and 4.4% increase, as compared to 2016. Conjugate Pneu- mococcal and Meningococcal C vaccines coverage increased, respectively, by +2.5% and +2.4% between 2016 and 2017. National-level polio vaccine coverage remained above the 95% PNPV coverage target between 2000 and 2013 and has remained below since then. In particular, it has had been steadily declin- ing between 2011 and 2016 (-2.8%). Measles coverage remained well below the 95% coverage target for the entire study period. In recent times, it declined by 4.8% between 2011 and 2015 with the lowest cover- age rate reported for year 2015 (85.3%). There is high heterogeneity in coverage within Regions for both mandatory and recommended vaccines.
Conclusion. Preliminary data show that childhood immunization coverage increased since the approval of the new law on mandatory vaccination. Nonetheless, as additional data are accumulating and will make it possible to further assess the impact of the new law, strengthened efforts are needed in Italy to promote informed and proactive vaccine uptake
Childhood vaccine coverage in Italy after the new law on mandatory immunization
No full textBackground. The Italian National Immunization Prevention Plan (PNPV) identifies vaccines actively offered free of charge to target populations within the National Health Service. Despite this, childhood immunization coverage has been declining in Italy in recent years. As a response, the Italian Parliament in July 2017 approved law n. 119 extending mandatory childhood vaccines from four to ten, this stimulating a lively debate at both the scientific and policy level. Methods. We analysed and critically interpreted 2000-2017 Italian national childhood immunization coverage trends, by different vaccine, target population, birth cohort and by Region. In particular, in order to preliminarily assess the impact of the new law, we computed percentage changes in 2016-2017 vaccine coverage for both mandatory and recommended vaccine programs. Data were provided by the Directorate General of Health Prevention of the Italian Ministry of Health. Results. In 2017 national-level vaccine coverage at 24 months of age was 94.5% for Polio and 91.7% for Measles, this representing, respectively 1.2% and 4.4% increase, as compared to 2016. Conjugate Pneumococcal and Meningococcal C vaccines coverage increased, respectively, by +2.5% and +2.4% between 2016 and 2017. National-level polio vaccine coverage remained above the 95% PNPV coverage target between 2000 and 2013 and has remained below since then. In particular, it has had been steadily declining between 2011 and 2016 (-2.8%). Measles coverage remained well below the 95% coverage target for the entire study period. In recent times, it declined by 4.8% between 2011 and 2015 with the lowest coverage rate reported for year 2015 (85.3%). There is high heterogeneity in coverage within Regions for both mandatory and recommended vaccines. Conclusion. Preliminary data show that childhood immunization coverage increased since the approval of the new law on mandatory vaccination. Nonetheless, as additional data are accumulating and will make it possible to further assess the impact of the new law, strengthened efforts are needed in Italy to promote informed and proactive vaccine uptake
Demografia d’impresa : l’utilizzo di tecniche di abbinamento per l’analisi della continuità
No full textContributi Istat n.
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