1,720,960 research outputs found
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Riqueza, abundância, composição de espécies e distribuição temporal de uma comunidade de anfíbios anuros no Parque Eólico de Osório, Rio Grande do Sul, sul do Brasil. & Composição de espécies de anuros da Planície Costeira do Rio Grande do Sul
Get PDFO presente estudo teve a finalidade de avaliar a riqueza, abundância, composição de espécies e a distribuição temporal (turno de vocalização e sazonalidade) da anurofauna em dois corpos d'água inseridos no Parque Eólico de Osório, no município de Osório, sul do Brasil. Foram realizados dois campos mensais em noites distintas para cada corpo d'água, sendo um alagado permanente (área I) e um alagado semi-permanente (área II), totalizando 24 noites de observação, entre o período de julho de 2013 a junho de 2014. A amostragem foi efetuada pelo método de Procura Visual e Auditiva noturna. Foram encontradas 19 espécies de anuros pertencentes às famílias, Hylidae (9), Leptodactylidae (7), Microhylidae (1), Bufonidae (1) e Odontophrynidae (1). De modo geral as duas áreas estudadas demonstraram similaridade entre a riqueza de espécies observadas, com a área I demonstrando a ocorrência de 18 espécies e a área II 17 espécies. O maior número de espécies e abundância de indivíduos foi no período de primavera e verão e o menor número no outono e inverno. Houve correlação entre a riqueza e a precipitação mensal e entre a abundância e a temperatura média mensal. Em capítulo a parte foi compilada uma lista de 12 levantamentos da anuroufauna da Planície Costeira do Rio Grande do Sul mostrando a riqueza regional e enfatizando as espécies raras, o status de conservação das espécies e a presença de unidades de conservação (UCs). Adicionalmente foi realizada uma análise de similaridade de espécies de anuros envolvendo esses inventários
Variations on the Author
Get PDF“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
Get PDFWe 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
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe 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
Diversidade acústica dos anfíbios anuros do Pampa brasileiro
No full textOs anfíbios anuros são organismos-modelo para estudar a comunicação sonora animal. Possuem um repertório vocal bastante diverso, nos cantos reprodutivos destacam-se o canto de anúncio, que é espécie e específico e uma excelente forma de diferenciar as espécies. Materiais baseados em acústica são importantes pois podem ajudar a descrever a distribuição geográfica das espécies e auxiliar no planejamento de estratégias de conservação e inventários de diversidade. Um trabalho recente demonstrou ser possível atribuir os cantos de anfíbios anuros a 8 guildas sonoras (nomeadas: A,B,C,D,E,F,G e H), fazendo uso de apenas 3 atributos de canto. Pensando nisso esse trabalho teve como objetivo (a) compilar o conhecimento sobre a bioacústica dos anuros ocorrentes do Pampa brasileiro; (b) aplicar o esquema de guildas sonoras na classificação de Anuros do Pampa; e (c) criar uma chave dicotômica de identificação de anfíbios do bioma pampa, baseada em seus cantos de anúncio, com enfoque na busca de caracteres diagnósticos. Fizemos uma revisão bibliográfica afim de compilar o conhecimento já existentes de anfíbios e criar um banco de dados acústicos de anfíbios do Pampa Brasileiro e aplicamos a classificação de guildas. Criamos um banco de dados para as espécies de anfíbios que conta com informações sobre 12 parâmetros acústicos para 53 espécies. Anfíbios anuros do Bioma pampa possuem 91,4% de seus cantos descritos. Foi possível criar uma chave de identificação para os anfíbios do Bioma Pampa. A guilda de cantos predominantes foi a C com 12 espécies, guilda F não possui nenhum representante, a família Hylidae foi a mais diversa estando presente em 6 guildas e os padrões mais frequentes foram cantos simples, cantos pulsados, e cantos sem modulação de frequência. A lacuna de conhecimento nas descrições de canto se concentra na família Bufonidae e pode ser justificada pois as espécies em questão são pouco conhecidas, possuem hábitos elusivos e possuem distribuição restrita. Alguns gêneros e espécies, tem cantos mais característicos, o que permite o uso em práticas de educação e conservação. Esse trabalho compilou o conhecimento sobre a bioacústica dos anuros do bioma Pampa, promovendo um maior conhecimento destas espécies a partir das caracterizações de seus cantos, auxiliando na identificação das e na obtenção de dados em campo afim de incentivar trabalhos de divulgação científica, educação ambiental e ciência cidadã. Demonstrando a importância da bioacústica frente as ações de conservação.Anuran amphibians are model organisms for studying animal sound communication. They have a very diverse vocal repertoire, in reproductive calls, the advertisement call stands out, which is species-specific and an excellent mean to differentiate between species. Acoustic-based materials are important as they can help describe the geographic distribution of species and assist in planning conservation strategies and diversity inventories. Recent work has shown that it is possible to assign the calls of Anuran amphibians to 8 sounding guilds (named: A,B,C,D,E,F,G and H), making use of only 3 call attributes. This work aimed to (a) compile knowledge about the bioacoustics of frogs from the Brazilian Pampa; (b) apply the sound guild scheme in the classification of Pampa`s anuram; and (c) create a dichotomous key to identify amphibians in the Pampa biome, based on their advertisement calls, focusing on the search for diagnostic characters. A literature review was done in order to compile the existing knowledge of amphibians and create an acoustic database of amphibians from the Pampa Brasileiro, and we applied the classification of guilds. 53 species.Anuran amphibians from the Pampa Biome have 91.4% of their songs described. It was possible to create an identification key for the amphibians from the Pampa Biome. The predominant song guild was C with 12 species, F guild has no representative , the Hylidae family was the most diverse being present in 6 guilds and the most frequent patterns were simple calls, pulsed calls, and calls without frequency modulation. The knowledge gap in song descriptions focuses on the Bufonidae family and can be justified because the species in question are little known, have elusive habits and a restricted habitat distribution. Some genera and species have more characteristic songs, which allows their use in education and conservation practices.This work compiled the knowledge about the bioacoustics of frogs from the Pampa biome, promoting a greater knowledge of these species from the characterization of their songs, helping to identify them and obtain data in the field in order to encourage scientific dissemination, environmental education and citizen science. Demonstrating the importance of bioacoustics in the face of conservation actions
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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