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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
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
Frugivorous flies (Tephritidae and Lonchaeidae): occurrence in commercial tangerine groves (Citrus reticulata Blanco) of Matinhas municipality
No full textMatinhas municipality with approximately 1.3 million of tangerine tree
(Citrus reticulata Blanco) ‘Dancy’ variety is responsible for 90% by tangerine production
of the State of Paraíba. Frugivorous flies assumed economic importance in commercial
tangerine groves because they cause premature dropping of fruits and significantly
decrease of havest. The research was carried out in five geographic regions of
Matinhas, municipality where twenty fruits on plant and twenty fruits under the plant had
been collected, with the aim to search the occurrence of frugivorous flies and its levels
of infestation in tangerine. Gotten results on occurrence showed that tangerine is
infested by frugivorous flies Ceratitis capitata (Wiedmann, 1824), Neosilba zadolicha
(McAlpine & Steyskal) and Neosilba glaberrima (Wiedmann, 1830). The infestation
index mean of C. capitata in five regions did not exceed 0.5 pupae/fruit. The emergence
percentage of (EP) of adults of C. capitata in fruits collected in plant and soil varied
among 14.0 and 54.0% of adults/fruit. The gotten infestation index for N. zadolicha had
variation among 0.4 and 4.3 pupaes/fruit. The data of emergence percentage (EP) of N.
zadolicha had variation among 49.9 and 65.9% of adults/fruit, that specie being
considered the most abundant and with high tax of survival. N.zadolicha specie was
chosen as a primary and economic importance pest to tangerine fruit in Matinhas
conditions. This is, also, the first report of these species N. zadolicha and N. glaberiima
causing infestation in tangerine fruits in State of Paraíba.O município de Matinhas com aproximadamente 1,3 milhões de plantas de
tangerina (Citrus reticulata Blanco) variedade ‘Dancy’ é responsável por 90% da
produção do Estado da Paraíba. As moscas frugívoras assumiram importância
econômica devido à infestação em frutos e redução significativa na colheita. A pesquisa
foi conduzida em cinco regiões geográficas do município de Matinhas, onde foram
coletados vinte frutos na copa e vinte sob a copa da planta, objetivando pesquisar a
ocorrência de moscas frugívoras e seus níveis de infestação em tangerina. Os
resultados obtidos evidenciaram que a tangerina é infestada por Ceratitis capitata
(Wiedmann,1824), Neosilba zadolicha (McAlpine & Steyskal) e Neosilba glaberrima
(Wiedmann,1830). O índice médio de infestação de C. capitata nas cinco regiões não
ultrapassou 0,5 pupa/fruto. A percentagem de emergência (PE) de C. capitata em
frutos coletados na planta e solo variou entre 14,0 a 54,0% de adultos/fruto. Os índices
de infestação de N. zadolicha em frutos coletados na planta e solo, variaram entre 0,4 a
4,3 pupários/fruto. Os dados da percentagem de emergência (PE) de N. zadolicha
variaram entre 49,9 a 65,9% de adultos/fruto sendo considerada a espécie mais
abundante, freqüente, dominante e com uma alta taxa de sobrevivência. N. zadolicha
foi considerada praga primária da tangerina nas condições de Matinhas. Este é,
também, o primeiro relato das espécies N. zadolicha e N. glaberrima infestando
tangerina na Paraíba
Not available
No full textAtravés de um levantamento nematológico de espécies parasitas associadas a tubérculos e rizosfera de plantas de batatinha (Solanum tuberosum L.), em cinco municípios produtores do Estado da Paraíba, foram identificados os seguintes nematóides: Criconemoides sp., Ditylenchus dipsaci, Helicotylenchus dihystera, Helicotylenchus sp., Meloidogyne incognita, Meloidogyne javanica, Meloidogyne sp. (larva), Peltamigratus ibiboca, Pratylenchus brachyurus, Rotylenchulus reniformis, Rotylenchulus sp., Trichodorus sp. e Xiphinema sp. As espécies causadoras de galhas, Meloidogyne incognita e Meloidogyne javanica, contribuem marcadamente à economia do lavrador, pois os tubérculos colhidos não chegam ao mercado consumidor devido à extrema deformação (pipocas) que apresentam, culminando em graves perdas. A espécie Peltamigratus ibiboca foi recentemente descrita. Ditylenchus dipsaci é agora assinalada pela primeira vez no Brasil. Estudou-se o método da termoterapia solar para controlar os nematóides das galhas (Meloidogyne incognita e M. javanica) infestando tubérculos. Tubérculos sementes da variedade "Delta Alemão" foram expostos ao sol em sacos pretos de polietileno, num total de cinco tratamentos: T1 (temperaturas variando entre 55-44°C); T2, (48-40°C); T3 (52-40°C); T4 (58-43°C); e T5 (58-44°C). Todos os tratamentos foram eficientes no controle dos nematóides. O melhor tratamento foi T1, em que se eliminaram 100% dos nematóides e 90% dos tubérculos permaneceram viáveis. Estes resultados indicam a grande potencialidade do método, para ser empregado como prática no controle dos nematóides das galhas em batatinha.A survey of plant parasitic nematodes in 5 potato (Solanum tuberosum L.) producing areas in the State of Paraiba, Brazil, was made. The following species were found: Ditylenchus dipsaci, Helicotylenchus dihystera, Helicotylenchus sp., Meloidogyne incognita, Meloidogyne javanica, Meloidogyne sp. (larve), Peltamigratus ibiboca, Pratylenchus brachyurus, Rotylenchulus reniformis, Rotylenchulus sp., Trichodorus sp. and Xiphinema sp. Root-knot nematodes were the most economically important species, due to the severe desfigurement shown by the tubers. Peltamigratus ibiboca, a recently described species, was for the first time referred to Paraíba; D. dipsaci, an internationally known species, was for the first time referred to Brazil. Sun thermotherapy for control of root-knot nematodes (Meloidogyne incognita and M. javanica) in potato tubers is reported. Seed potato tubers, variety "Delta Alemão",were put into polyethylene black bags and exposed to sun heat for 4, 6, 8, 10 and 12 hours, the resulting variation of temperature inside the bags being 55-42°C (T1); 48-40°C (T2), 52-40°C (T3); 58-43°C (T4); and, 58-44°C (T5). All nematodes were eliminated by that treatments. Treatment T1 (4 hour exposition to sun temperature varying from 55 to 42°C) gave the best results, 90% of treated tubers remaining viable and killing all nematodes. Results here reported indicate that thermotherapy by sun heat was effective as a method for treating potato tubers infected with root-knot nematodes
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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