1,721,713 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
Reproductive phenology stages and their contributions to seed production of two Arachis pintoi ecotypes (CIAT 17434 and CIAT 18744) in Sudanian savanna region of Benin, West Africa
No full textpeer reviewedFlowering pattern, reproductive stage period (flowering, peg production, pod production and seed maturation) and efficiency of each stage for mature fruit production of two Arachis pintoi ecotypes (CIAT 17434 and CIAT 18744) were investigated in West Africa. Plants were sown in a randomized complete block design with four replicates per ecotype. Data collected over 3 years were analyzed with ANOVA. First flowers appeared on average 26 and 45 d after sowing for CIAT 17434 and CIAT 18744, respectively. Pegs began to extend about 8 and 18 d after anthesis; pod initiation about 22 and 40 d after anthesis and seed fully matured about 85 and 120 d after anthesis, respectively. CIAT 17434 produced (2269 flowers/plant) significantly (p≤0.05) more flower than CIAT 18744 (761 flowers/plant) during 7 months flowering. Conversely, flower efficiency for peg production was significantly (p≤0.05) higher for CIAT 18744 (8.14%) than for CIAT 17434 (4.02%). From 85 to 97% of pegs produced pods for both ecotypes. This research showed clearly that the principal constraint for effective seed production in particular ecological conditions of West Africa was the quite low efficiency of flowers for pegs production
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
Dinámica fermentativa y fraccionamiento proteíco durante el ensilaje de Maní Forrajero (CIAT 17434)
No full textDinámica fermentativa y fraccionamiento proteico durante el ensilaje de maní forrajero (CIAT 17434). Se analizó el comportamiento fermentativo del ensilaje de maní forrajero (CIAT 17434) cada 10 días durante un periodo de 60 días, cosechado en San Carlos, Costa Rica, durante el mes de octubre del año 2001. El material a ensilar se cosechó a 12 semanas, se picó y se le adicionó 6% de melaza con relación al peso fresco de la muestra. El contenido de materia seca (MS), proteína cruda (PC), fibra detergente neutro (FDN), fibra detergente ácida (FDA) y el valor de pH del ensilaje sufren una disminución durante los 60 días de fermentación, de 25,57, 5,10, 18,00, 10,00 y 5,10%, respectivamente. En cambio, el contenido de nitrógeno amoniacal, la capacidad buffer, la concentración de ácido láctico y acético aumentaron, con un valor porcentual de 112 % y valores promedio de 98,69 meq de NaOH /100 g, 3,67 % MS y 6,16 % MS, respectivamente. Con relación al fraccionamiento de la proteína el material a ensilar presentó un tercio del contenido proteíco soluble, un tercio insoluble aprovechable y un tercio indigerible, mientras que por efecto del proceso fermentativo el contenido de PC soluble se mantuvo (33 %), la PC-insoluble aprovechable aumentó a 51 % y la de PC indigerible se redujo a 16 %. El ensilaje de maní forrajero se puede emplear como alimento para animales de alto potencial productivo (leche y carne) a partir de los diez días post-fermentación, ya que se estabiliza el sistema y que presenta una gran proporción de proteína de sobrepaso
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
Dinámica fermentativa y fraccionamiento proteíco durante el ensilaje de Maní Forrajero (CIAT 17434)
Get PDFDinámica fermentativa y fraccionamiento proteico durante el ensilaje de maní forrajero (CIAT 17434). Se analizó el comportamiento fermentativo del ensilaje de maní forrajero (CIAT 17434) cada 10 días durante un periodo de 60 días, cosechado en San Carlos, Costa Rica, durante el mes de octubre del año 2001. El material a ensilar se cosechó a 12 semanas, se picó y se le adicionó 6% de melaza con relación al peso fresco de la muestra. El contenido de materia seca (MS), proteína cruda (PC), fibra detergente neutro (FDN), fibra detergente ácida (FDA) y el valor de pH del ensilaje sufren una disminución durante los 60 días de fermentación, de 25,57, 5,10, 18,00, 10,00 y 5,10%, respectivamente. En cambio, el contenido de nitrógeno amoniacal, la capacidad buffer, la concentración de ácido láctico y acético aumentaron, con un valor porcentual de 112 % y valores promedio de 98,69 meq de NaOH /100 g, 3,67 % MS y 6,16 % MS, respectivamente. Con relación al fraccionamiento de la proteína el material a ensilar presentó un tercio del contenido proteíco soluble, un tercio insoluble aprovechable y un tercio indigerible, mientras que por efecto del proceso fermentativo el contenido de PC soluble se mantuvo (33 %), la PC-insoluble aprovechable aumentó a 51 % y la de PC indigerible se redujo a 16 %. El ensilaje de maní forrajero se puede emplear como alimento para animales de alto potencial productivo (leche y carne) a partir de los diez días post-fermentación, ya que se estabiliza el sistema y que presenta una gran proporción de proteína de sobrepaso
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
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