1,720,962 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
Biogeography and effects of forest fragmentation on birds of the Upper Paraná River Floodplain region, between Mato Grosso do Sul and Paraná States, Brazil.
No full textThis study analyzed the forest birds distribution and sensitivity to forest fragmentation in the Upper Paraná River Floodplain (PAAP) region by comparing the avifauna of the two margins (Mato Grosso do Sul; MS and Paraná; PR) of the Paraná River. The landscapes of two margins are distinct because PAAP is located near the boundaries of both Central South America (CSA) and Atlantic Forest (ATL) biogeographic zone, with each margin being represented by one zone and due to the presence of a floodplain only at the MS margin. The communities were similar in structural parameters, but there were low qualitative and quantitative similarities between the margins, possibly due to the influence of the biogeographic zones; several species related either to CSA or ATL zones occurred exclusively, or were more abundant, at the margin were they were expected to occur. The avifaunal sensitivity to forest fragmentation varied between the margins, with greater proportion of bird species not sensitive at the MS margin. In addition, the degree of sensitivity of 30% of the species recorded at the two margins and the sensitivity of some functional groups with characteristics less affected negatively by fragmentation vary between the margins. The sensitivity of the species related to either the CSA or ATL zone was distinct, once that none of the species related to the CSA zone at MS margin were considered sensitive, while species related to the ATL zone had greater proportion of sensitive species at both margins. Overall, this study suggests a transition between the CSA and ATL avifauna in the PAAP region and recommends that conservation strategies should consider such regional feature since the sensitivity of functional groups or species can vary between landscapes.Este estudo analisou a distribuição da avifauna florestal e a sua sensibilidade à fragmentação florestal na região da Planície Alagável do Alto Rio Paraná (PAAP), comparando a avifauna das duas margens (Mato Grosso do Sul; MS e Paraná; PR) do rio Paraná. As paisagens das duas margens são diferentes em função da proximidade com o limite de distribuição das zonas biogeográficas Centro Sul Americana (CSA) e Atlântica (ATL), cada qual mais representativa em uma das margens, e pela presença da planície alagável apenas na margem MS. As comunidades foram semelhantes quanto a parâmetros estruturais, mas houve baixa similaridade qualitativa e quantitativa entre as margens, aparentemente por influência das afinidades biogeográficas; várias espécies associadas apenas à zona CSA ou ATL ocorreram somente, ou foram mais abundantes, na margem em que seriam esperadas. Houve maior proporção de espécies não sensíveis na margem MS, quando comparada à margem PR. Além disso, o grau de sensibilidade de 30% das espécies que ocorreram nas duas margens e a de grupos funcionais com características menos afetadas negativamente pela fragmentação, variou entre as margens. A sensibilidade das espécies associadas à zona CSA ou ATL mostrou-se distinta, uma vez que 100% das espécies associadas à zona CSA na margem MS foram não sensíveis enquanto as espécies associadas à zona ATL tiveram maior proporção de espécies sensíveis nas duas margens. No geral, o estudo sugeriu uma transição entre a avifauna das zonas CSA e ATL na região da PAAP e recomenda que estratégias de conservação de aves florestais não deveriam ser generalizadas uma vez que a sensibilidade de grupos funcionais ou de cada espécie pode variar entre paisagens.Ph
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
Biogeography and effects of forest fragmentation on birds of the Upper Paraná River Floodplain region, between Mato Grosso do Sul and Paraná States, Brazil.
No full textThis study analyzed the forest birds distribution and sensitivity to forest fragmentation in the Upper Paraná River Floodplain (PAAP) region by comparing the avifauna of the two margins (Mato Grosso do Sul; MS and Paraná; PR) of the Paraná River. The landscapes of two margins are distinct because PAAP is located near the boundaries of both Central South America (CSA) and Atlantic Forest (ATL) biogeographic zone, with each margin being represented by one zone and due to the presence of a floodplain only at the MS margin. The communities were similar in structural parameters, but there were low qualitative and quantitative similarities between the margins, possibly due to the influence of the biogeographic zones; several species related either to CSA or ATL zones occurred exclusively, or were more abundant, at the margin were they were expected to occur. The avifaunal sensitivity to forest fragmentation varied between the margins, with greater proportion of bird species not sensitive at the MS margin. In addition, the degree of sensitivity of 30% of the species recorded at the two margins and the sensitivity of some functional groups with characteristics less affected negatively by fragmentation vary between the margins. The sensitivity of the species related to either the CSA or ATL zone was distinct, once that none of the species related to the CSA zone at MS margin were considered sensitive, while species related to the ATL zone had greater proportion of sensitive species at both margins. Overall, this study suggests a transition between the CSA and ATL avifauna in the PAAP region and recommends that conservation strategies should consider such regional feature since the sensitivity of functional groups or species can vary between landscapes.Este estudo analisou a distribuição da avifauna florestal e a sua sensibilidade à fragmentação florestal na região da Planície Alagável do Alto Rio Paraná (PAAP), comparando a avifauna das duas margens (Mato Grosso do Sul; MS e Paraná; PR) do rio Paraná. As paisagens das duas margens são diferentes em função da proximidade com o limite de distribuição das zonas biogeográficas Centro Sul Americana (CSA) e Atlântica (ATL), cada qual mais representativa em uma das margens, e pela presença da planície alagável apenas na margem MS. As comunidades foram semelhantes quanto a parâmetros estruturais, mas houve baixa similaridade qualitativa e quantitativa entre as margens, aparentemente por influência das afinidades biogeográficas; várias espécies associadas apenas à zona CSA ou ATL ocorreram somente, ou foram mais abundantes, na margem em que seriam esperadas. Houve maior proporção de espécies não sensíveis na margem MS, quando comparada à margem PR. Além disso, o grau de sensibilidade de 30% das espécies que ocorreram nas duas margens e a de grupos funcionais com características menos afetadas negativamente pela fragmentação, variou entre as margens. A sensibilidade das espécies associadas à zona CSA ou ATL mostrou-se distinta, uma vez que 100% das espécies associadas à zona CSA na margem MS foram não sensíveis enquanto as espécies associadas à zona ATL tiveram maior proporção de espécies sensíveis nas duas margens. No geral, o estudo sugeriu uma transição entre a avifauna das zonas CSA e ATL na região da PAAP e recomenda que estratégias de conservação de aves florestais não deveriam ser generalizadas uma vez que a sensibilidade de grupos funcionais ou de cada espécie pode variar entre paisagens.83
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
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
- …
