1,721,015 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
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
Análise da amplitude do sinal eletromiográfico das porções do músculo quadríceps em protocolos de treinamento com diferentes durações das ações musculares
Full text linkThe aim of the present study was to analyze the EMG signal of VM, VL, and RF at strength training protocols with multiple series and similar duration of repetitions and different duration of muscle actions. Twelve female volunteers performed tree strength training protocols at the knee extension exercise with 3 series of 6 repetitions, 180 seconds between series and 50% of 1RM intensity, 6 seconds duration of repetition being configured in different ways for the 3 protocols: Protocol 1 1s of concentric action and 5s of eccentric action (1:5); Protocol 2 3s of concentric action and 3s of eccentric action (3:3); Protocol 3 5s of concentric action and 1s of eccentric action (5:1). It has been recorded the activation of vastus lateralis, vastus medialis and rectus femoris during the performance of strength training protocols and the root mean square of the electromyography normalized signal has been calculated for each repetition. It was also analyzed the activation ratios between VM/VL, VM/RF and VL/RF. Results showed that the muscle action durations performed resulted in different activation of VM and VL through the equivalent repetitions of each series, although similarly between protocols. The RF presented a different EMG profile for the three procedures (1:5, 3:3, 5:1). The protocols with different duration of muscle actions adopted in present study were able to change the ratio VM/VL and VL/RF only among some equivalent repetitions of each series. For VM/RF ratio no significant differences were observed. Thus, protocols with different durations of muscular actions seem to alter the EMG in a distinct way along the equivalent repetitions only for RFO presente estudo teve como objetivo comparar a amplitude do sinal EMG das porções VM, VL e RF ao longo das repetições equivalentes de cada série de protocolos equiparados com séries múltiplas, duração da repetição semelhante e diferentes durações das ações musculares e realizar essas comparações nas relações de ativação VM/VL, VM/RF e VL/RF. Doze voluntárias do sexo feminino realizaram de forma balanceada três protocolos de treinamento de força no exercício extensor de joelhos com 3 séries de 6 repetições, 180 s de pausa entre séries e intensidade de 50% de 1RM, duração da repetição de 6s, sendo configurada de formas distintas para os 3 protocolos: Protocolo 1- 1s para a ação concêntrica e 5s para a ação excêntrica (1-5); Protocolo 2- 3s de concêntrica e 3s de excêntrica (3:3); e para o Protocolo 3 - 5s de concêntrica e 1s de excêntrica (5:1). Foram registradas as ativações do vasto medial, vasto lateral e reto femoral durante a realização dos protocolos do treinamento de força e a root mean square da amplitude do sinal eletromiográfico normalizada (EMG RMS normalizada) foi calculada para cada repetição. Através dos valores obtidos da ativação das porções foram calculadas as relações VM/VL, VM/RF e VL/RF. Os resultados mostraram que as diferentes durações das ações musculares resultaram em alterações da ativação do VM e VL ao longo das repetições equivalentes de cada série, porém de forma semelhante entre os protocolos. Para o RF a alteração na ativação EMG ao longo do protocolo ocorreu de forma diferente para os três protocolos (1:5, 3:3 e 5:1). Os protocolos com diferentes durações das ações musculares adotadas no presente estudo foram capazes de alterar a relação VM/VL e VL/RF apenas entre algumas repetições equivalentes de cada série. Para a relação VM/RF não foram verificadas diferenças significantes. Assim, protocolos com diferentes durações das ações musculares parecem alterar de maneira distinta a ativação ao longo das repetições equivalentes apenas para o R
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
Análise da amplitude do sinal eletromiográfico das porções do músculo quadríceps em protocolos de treinamento com diferentes durações das ações musculares
No full textThe aim of the present study was to analyze the EMG signal of VM, VL, and RF at strength training protocols with multiple series and similar duration of repetitions and different duration of muscle actions. Twelve female volunteers performed tree strength training protocols at the knee extension exercise with 3 series of 6 repetitions, 180 seconds between series and 50% of 1RM intensity, 6 seconds duration of repetition being configured in different ways for the 3 protocols: Protocol 1 1s of concentric action and 5s of eccentric action (1:5); Protocol 2 3s of concentric action and 3s of eccentric action (3:3); Protocol 3 5s of concentric action and 1s of eccentric action (5:1). It has been recorded the activation of vastus lateralis, vastus medialis and rectus femoris during the performance of strength training protocols and the root mean square of the electromyography normalized signal has been calculated for each repetition. It was also analyzed the activation ratios between VM/VL, VM/RF and VL/RF. Results showed that the muscle action durations performed resulted in different activation of VM and VL through the equivalent repetitions of each series, although similarly between protocols. The RF presented a different EMG profile for the three procedures (1:5, 3:3, 5:1). The protocols with different duration of muscle actions adopted in present study were able to change the ratio VM/VL and VL/RF only among some equivalent repetitions of each series. For VM/RF ratio no significant differences were observed. Thus, protocols with different durations of muscular actions seem to alter the EMG in a distinct way along the equivalent repetitions only for RFO presente estudo teve como objetivo comparar a amplitude do sinal EMG das porções VM, VL e RF ao longo das repetições equivalentes de cada série de protocolos equiparados com séries múltiplas, duração da repetição semelhante e diferentes durações das ações musculares e realizar essas comparações nas relações de ativação VM/VL, VM/RF e VL/RF. Doze voluntárias do sexo feminino realizaram de forma balanceada três protocolos de treinamento de força no exercício extensor de joelhos com 3 séries de 6 repetições, 180 s de pausa entre séries e intensidade de 50% de 1RM, duração da repetição de 6s, sendo configurada de formas distintas para os 3 protocolos: Protocolo 1- 1s para a ação concêntrica e 5s para a ação excêntrica (1-5); Protocolo 2- 3s de concêntrica e 3s de excêntrica (3:3); e para o Protocolo 3 - 5s de concêntrica e 1s de excêntrica (5:1). Foram registradas as ativações do vasto medial, vasto lateral e reto femoral durante a realização dos protocolos do treinamento de força e a root mean square da amplitude do sinal eletromiográfico normalizada (EMG RMS normalizada) foi calculada para cada repetição. Através dos valores obtidos da ativação das porções foram calculadas as relações VM/VL, VM/RF e VL/RF. Os resultados mostraram que as diferentes durações das ações musculares resultaram em alterações da ativação do VM e VL ao longo das repetições equivalentes de cada série, porém de forma semelhante entre os protocolos. Para o RF a alteração na ativação EMG ao longo do protocolo ocorreu de forma diferente para os três protocolos (1:5, 3:3 e 5:1). Os protocolos com diferentes durações das ações musculares adotadas no presente estudo foram capazes de alterar a relação VM/VL e VL/RF apenas entre algumas repetições equivalentes de cada série. Para a relação VM/RF não foram verificadas diferenças significantes. Assim, protocolos com diferentes durações das ações musculares parecem alterar de maneira distinta a ativação ao longo das repetições equivalentes apenas para o R
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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