1,721,091 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
Tristeza e depressão: análise do discurso dos médicos psiquiatras de um município de Santa Catarina
Full text linkDissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Ciências da Saúde. Programa de Pós-Graduação em Saúde ColetivaA palavra depressão ou "estar deprimido" hoje faz parte do vocabulário popular. Temos acompanhado um crescente aumento de situações diagnosticadas como depressão e do consumo de medicamentos antidepressivos. Situações de tristeza que anteriormente eram tidas como parte da vida hoje são classificadas como depressão e muitas vezes medicadas. Um corte importante desta mudança foi a emergência, a partir de 1980, do Manual de Diagnóstico e Estatística dos Transtornos Mentais, 3a edição ou DSM III, que propõe uma abordagem descritiva dos indivíduos através dos seus sintomas. Nesse contexto, se inseriu o objetivo principal desta pesquisa que é analisar o discurso dos psiquiatras que atuam em um município de Santa Catarina sobre o diagnóstico e tratamento das situações de sofrimento psíquico: tristeza e depressão. Para isso, foram realizadas entrevistas estruturadas com os psiquiatras que atuam nos Núcleos de Apoio a Saúde da Família(NASFs) no município de Florianópolis. A análise dos dados resultou em três eixos temáticos: "A perda do contexto na distinção entre tristeza e depressão", "A classificação por sintomas" e "O que os psiquiatras conseguem oferecer". Observamos que apesar de reconhecerem diferença entre as situações de tristeza e depressão, na prática esta distinção é realizada com base nos sintomas. Como os sintomas são semelhantes nos casos de tristeza e depressão o limite entre o normal e o patológico não é estabelecido gerando a medicalização de casos de tristeza normal. E esta medicalização de situações que fazem parte da vida gera consequências que são a estigmatização dos indivíduos e tratamentos inadequados. Além disto o que os psiquiatras conseguem e sabem oferecer aqueles que lhes procuram é o medicamento. A atuação dos psiquiatras entrevistados é principalmente na redução dos sintomas através do medicamento. A intervenção terapêutica passa a ser definida em função da tradução do sintoma em sinal de doença, e não de sua relação com as singularidades do sujeito. Apesar de terem uma especialização em psiquiatria o que estes profissionais conseguem ofertar são medicamentos direcionados ao perfil de sintomas daqueles que lhes procuram. E como desfecho acompanhamos a crescente procura de interpretação e prescrição médica das situações consideradas como parte dos problemas da vid
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
Ultra-Stable and Robust Response to X-Rays in 2D Layered Perovskite Micro-Crystalline Films Directly Deposited on Flexible Substrate
Full text link2D layered hybrid perovskites have recently attracted an increasing interest as active layers in LEDs and UV–Vis photodetectors. 2D perovskites crystallize in a natural self-assembled quantum well-like structure and possess several interesting features among which low-temperature (<100 °C) synthesis and low defect density. Here are presented solid-state ionizing radiation direct detectors based on the 2D layered hybrid perovskite PEA2PbBr4 (PEA = C6H5C2H4NH3+) deposited from solution using scalable techniques and directly integrated onto a pre-patterned flexible substrate in the form of micro-crystalline films displaying crystal-like behavior, as evidenced by the ultra-fast (sub-microsecond) and good detection performances under UV light. The effective detection of X-rays (up to 150 kVp) is demonstrated with sensitivity values up to 806 μC Gy−1 cm−2 and Limit of Detection of 42 nGy s−1, thus combining the excellent performance for two relevant figures of merit for solid-state detectors. Additionally, the tested devices exhibit exceptionally stable response under constant irradiation and bias, assessing the material robustness and the intimate electrical contact with the electrodes. PEA2PbBr4 micro-crystalline films directly grown on flexible pre-patterned substrate open the way for large-area solid-state detectors working at low radiation flux for ultra-fast X-ray imaging and dosimetry
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
- …
