1,721,300 research outputs found
Kinetics of calcium steps underlying calcium oscillations in melanotrope cells of Xenopus laevis
No full textContains fulltext :
29784.pdf (Publisher’s version ) (Closed access
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
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
Intestinal health assessment of broilers supplemented with Bacillus subtilis DSM 29784
Get PDFOrientador: Prof. Dr. Rafael Felipe da Costa VieiraCoorientadora: Profa. Dra. Julia Arantes GalvãoDissertação (mestrado) - Universidade Federal do Paraná, Setor de Ciências Agrárias, Programa de Pós-Graduação em Ciências Veterinárias. Defesa : Curitiba, 14/02/2020Inclui referênciasResumo: A saúde intestinal dos frangos de corte é um fator importante que influencia a produtividade na avicultura de forma que, uma mucosa intestinal prejudicada tem baixa digestão e absorção de nutrientes e isso afetará as funções fisiológicas do hospedeiro, resultando em um sistema imunológico enfraquecido, mais susceptível a doenças e, consequentemente, causará perda econômica e de bem-estar animal. Desde que os antibióticos foram banidos na produção animal de vários países, métodos alternativos foram desenvolvidos para melhorar a performance dos frangos, como por exemplo os probióticos, que estimulam o crescimento de bactérias produtoras de ácido-lático consideradas benéficas para o intestino, aumentam o ganho de peso, promovem o equilíbrio da microbiota, melhoram a morfologia intestinal e modulam a imunidade intestinal. Neste trabalho foi realizado um estudo sobre probióticos e um experimento específico sobre os efeitos do Bacillus subtilis DSM 29784. O experimento foi realizado com frangos de corte desafiados com C. perfringens e Eimeria spp. ou não desafiados, e suplementados com B. subtilis DSM 29784, enramicina ou não-suplementados. Aos 7, 14 e 21 dias de idade foi avaliada a performance das aves, a saúde intestinal com o método histológico I See Inside (ISI) e a reposta imunológica com quantificação celular de linfócitos T (CD4+, CD8+ e macrófagos). Não foi encontrado diferença estatística para resultado de performance em aves suplementadas com o probiótico ou com a Enramicina, apenas entre desafiados e não desafiados. O resultado do ISI demonstrou maior escore de índice histológico em aves desafias, quando comparadas com não desafiadas em todos os períodos. O grupo desafiado e suplementado com B. subtilis DSM 29784 apresentou menor escore total ISI aos 7 e 14 dias quando comparado com o desafiado e nãosuplementado. Aos 21 dias, o grupo não-desafiado e suplementado com Enramicina teve o menor escore total ISI dentre todos os grupos. Aves suplementadas com o probiótico tiveram um menor escore de células CD4+ e CD8+ aos 7 dias, um pico aos 14 e posterior queda aos 21 dias. A contagem de macrófagos foi elevada em aves não desafiadas aos 7 dias de idade. Os resultados deste experimento demonstraram que o probiótico teve um impacto positivo na saúde intestinal de frangos de corte desafiados. Palavras-chave: Probiótico. Antibiótico promotor de crescimento. Enterite necrótica. Clostridiose. Linfócitos T.Abstract: Chicken intestinal health is an important factor that concerns aviculture productivity somehow that disruptive mucosa has poorer nutrient digestion and absorption that will physiologically affect the host resulting in weaker immunological system, more susceptible to diseases and, consequently will cause economical losses and failed animal well-being. Since antibiotic ban in animal production of many countries, alternative methods have been developed to enhance broiler chicken performance, for instance probiotics stimulate the grown of lactic-acid producer bacterias considered beneficial for intestinal health, improving body weight gain, promoting microbiota balance, enhancing intestinal morphology and modulating intestinal immunity. In this dissertation it was accomplished a study about probiotics and then it was performed a trial specifically on Bacillus subtilis DSM 29784. In the experiment it was evaluated broiler chickens challenged or not with C. perfringens e Eimeria spp. and supplemented with B. subtilis DSM 29784 or Enramycin or not supplemented at all. At 7, 14 and 21 days of age it was evaluated bird's performance, intestinal health with the histological method I See Inside (ISI) and immunological response through lymphocyte T cell (CD4+, CD8+ and macrophage) quantification. No statistical difference was found on performance in birds supplemented or not with probiotic or Enramycin, except among challenged or non-challenged birds. ISI results demonstrated higher total score in challenged birds when compared to non-challenge ones at all ages. The challenged group supplemented with B. subtilis DSM 29784 presented lower ISI total score at 7 and 14 days, when compared to challenged and non-supplemented group. At 21 days, the non-challenged and supplemented with Enramycin group had the lowest ISI total score among all groups. Birds supplemented with the probiotic had a lower CD4+ and CD8+ cell counts at 7 days, followed by a peak at 14 days and posterior decrease at 21 days. Macrophage cell counts was higher in non-challenged birds at 7 days of age. Results demonstrated that B. subtilis DSM 29784 had a positive impact over intestinal health of challenged birds. Keywords: Probiotic. Antibiotic growth promoter. Necrotic enteritis. Clostridiosis. T Lymphocyte
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
- …
