1,720,959 research outputs found

    Going Beyond Counting First Authors in Author Co-citation Analysis

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    The 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

    Concentrations of digestible, metabolizable, and net energy in coconut co-products fed to growing pigs

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    This experiment was conducted to determine the concentration of digestible (DE), metabolizable (ME), and net energy (NE), and to develop prediction equations for DE and ME in coconut co-products (CCP) fed to growing pigs. The CCP used were copra meal (CM), protein enriched copra meal (PECM), and white copra (WC) obtained from the different sources in the Philippines. Twenty-two growing barrows (PIC L337 × C24; initial BW 18.74 ± 0.91 kg) were individually housed in metabolism cages that allowed for a total but separated collection of feces and urine. Pigs were arranged in a replicated 11 × 3 Youden square design with 11 dietary treatments at three periods each. A basal diet that contained 96.26% corn, and ten additional diets consisting of 70% basal diet and 30% CCP were formulated. All diets have the same proportion of corn and other ingredients. Fecal, urine, diet, and CCP samples were analyzed for gross energy (GE) using bomb calorimetry. The DE and ME concentrations of CCP diets and ingredients were calculated. The NE of diets and ingredients were estimated using the prediction equation (NE = 0.870 × ME – 442). The DE, ME, and NE concentrations differed (P \u3c 0.001) among CCP and ranged from 1,843 to 3,284, 1,666 to 3,211, and 1,008 to 2,352 kcal/kg DM, respectively. The DE (3,193 kcal/kg DM), ME (3,074 kcal/kg DM), and NE (1,774 kcal/kg DM) concentrations of CM was greater (P \u3c 0.001) than PECM (1,859, 1,717, and 1,052 kcal/kg DM, respectively) but with similar DE (2,657 kcal/kg DM), ME (2,562 kcal/kg DM), and NE (1,787 kcal/kg DM) of WC. However, the DE, ME, and NE of WC was greater (P \u3c 0.001) than PECM. A positive correlation (r ≥ 0.72; P \u3c 0.05) was observed between the DE and ME and acid detergent fiber (ADF) in 8 CCP (excluding WC samples). The DE and ME concentrations in CCP may be predicted using the following equations: 1) DE = -715.30 + 101.42 × % ADF (R2 = 0.52, RMSE = 403.85, P = 0.04); and 2) ME = -983.16 + 106.13 × % ADF (R2 = 0.51, RMSE = 427.42, P = 0.04). In conclusion, DE and ME concentrations differ among CCP sources fed to growing pigs. Moreover, DE and ME values in CCP can be predicted using ADF as independent variable

    Study on novel feeding systems using coconut co-products in swine in the Philippines

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    名古屋大学NAGOYA University博士(農学)doctoral thesi

    Variations on the Author

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    “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

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    We 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

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    We 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

    Author Index

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