1,721,020 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
Etude des erreurs en dosimétrie dans le cadre d'une étude internationale concertée sur le risque de cancer chez les travailleurs de l'industrie nucléaire (étude des erreurs sur les estimations des doses de photons d'énergie entre 100 et 3000 keV)
No full textAIX-MARSEILLE1-BU Sci.St Charles (130552104) / SudocSudocFranceF
ETUDE DES ERREURS DE DOSIMETRIE DANS LE CADRE D'UNE ETUDE INTERNATIONALE CONCERTEE SUR LE RISQUE DE CANCER CHEZ LES TRAVAILLEURS DE L'INDUSTRIE NUCLEAIRE. ETUDE DES ERREURS SUR LES ESTIMATIONS DES DOSES DE PHOTONS D'ENERGIE ENTRE 100 ET 3000 KEV
No full textAIX-MARSEILLE1-BU Sci.St Charles (130552104) / SudocSudocFranceF
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
Understanding the health effects of low doses of ionizing radiation from medical procedures : Challenges for epidemiology
No full textLa aplicación de la radiación ionizante (RI) en ámbito médico ha llegado, sin duda, para salvar vidas. Sin embargo, hay una preocupación entre los expertos de salud pública y protección radiológica con relación al incremento de la exposición medica a RI, sobretodo en pacientes pediátricos. Esta tesis tiene como objetivo contribuir a una mejor caracterización del riesgo de radiación en pacientes oncológicos.
Con ese fin, se creó un estudio de cohorte de supervivientes de cáncer infantil, como base para el análisis futuro y, anidado a esta cohorte, se implementó un estudio transversal sobre el efecto del neurodesarrollo después de haber recibido radioterapia no-craneal. Aquí se presenta un análisis descriptivo del estado de salud mental de la cohorte en forma de articulo científico.
También se ha estimado la asociación entre la dosis acumulada de RI de los procedimientos de diagnóstico médico, como la exposición al radio-diagnostico y el cáncer (linfoma en adultos y tumores cerebrales en niños-adolescentes), en dos grandes estudios internacionales caso-control y dicho trabajo se unió a una estimación de dosimetría que puede ser aprovechada aún más para estudios similares. Este trabajo se presenta en forma de tres articulo científicos.
En el marco de esta tesis, también, se sintetizó la evidencia actual de un efecto en el neurodesarrollo de la exposición a RI de dosis baja a moderada, en una revisión sistemática (en forma de artículo científico), concluyendo que la evidencia de este efecto es limitada e inadecuada.
La estimación de los efectos de radiación médica requiere grandes esfuerzos y la colaboración entre epidemiólogos y clínicos es un aspecto clave en este tema.The application of ionising radiation (IR) in the medical sector is undoubtedly lifesaving. There are, however, risks associated with IR and there is growing concern among public health and radiation protection experts, in particular for the increasing medical radiological exposure in children. The aim of this dissertation is to contribute to a better characterisation of the IR risk in patients.
A hospital-based cohort study of childhood cancer survivors was developed as a basis for future analysis and, nested within the cohort, a cross-sectional study on neurodevelopmental effect after non-cranial radiotherapy was implemented. A descriptive analysis of the mental health status of the cohort is presented here in the form of a Manuscript.
The association between cumulative IR from medical diagnostic procedures and cancer (adult lymphoma and childhood/adolescent brain cancer), in two large international case-control studies, were estimated and a dosimetry estimation was developed. This work has lead to three manuscripts, included in the thesis.
Evidence of a neurodevelopmental effect at low-to moderate IR dose was synthesized in a systematic review (presented here in a form of a Manuscript) and was found to be limited to inadequate.
The estimated effect at this low dose range requires greater effort from epidemiologists to design more informative studies, and collaboration with clinicians is key for future research in radiation epidemiology.Programa de doctorat en Biomedicin
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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