1,721,038 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
Mid-infrared spectroscopy for an accurate prediction of immunoglobulins G concentration in bovine colostrum
No full textMid-infrared spectroscopy for a rapid assessment of immunoglobulins G level in bovine colostrum
No full textThe concentration of immunoglobulins G (IgG, g/l) defines colostrum quality in cattle. By convention, colostrum
with IgG<50 g/l is not recommended for calves feeding in the first h of life due to insufficient antibodies level. On
average, 15% of cows produce colostrum of unacceptable quality in dairy farms, exposing the calf to greater risk of
mortality and morbidity and impairing the future heifer’s performance. In this study, first colostrum samples (521
Holstein cows) were collected between 2019 and 2020 in 9 farms within 6 h from calving. Each sample was aliquoted
for IgG and protein content determination via gold standard, i.e. radial immunodiffusion and Kjeldahl, respectively,
and for prediction of total protein content via mid-infrared spectroscopy (MIR) using the prediction model developed
for mature milk. Before MIR analysis, colostrum samples were diluted in pure water (1:1) to reduce matrix density
and avoid clogging issues. We demonstrated that MIR-predicted protein content was significantly correlated with both
IgG (r=0.87) and protein content (r=0.97) measured with gold standard. Moreover, receiving operating characteristic
analysis (ROC) showed that MIR-predicted protein content was able to accurately identify low- from high-quality
colostrum samples regardless of the IgG threshold considered (50, 70, or 90 g/l). In parallel, we evaluated the
discriminant ability of colostral refractive index (BRIX), whose performance were similar to those of MIR-predicted
protein content. The area under the ROC curve was excellent, being 0.85 for MIR-predicted protein content and 0.83
for BRIX when IgG threshold was set at 50 g/l. The cut-off identified for MIR-predicted protein content was 13.08,
13.28, and 14.64% for IgG threshold at 50, 70, and 90 g/l, respectively. Findings do suggest that milk labs equipped
with MIR devices may offer an indirect quality evaluation of bovine colostrum for screening purposes and to support
farmers’ decision making. Finally, our results are of interest for industries that use bovine colostrum as an ingredient
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
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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