1,720,958 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
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
Design of non-destructive methodologies for the evaluation of skeletal integrity of SCWL laying hens
No full textStudies were undertaken to assess the effects of various nutritional programs on subsequent productivity and skeletal status throughout the laying cycle. Non-destructive methodologies were evaluated to carry out assessments in-vivo and study structural changes in the bone associated with feed regimen and productivity. Combinations of dietary treatments were formulated to provide a range in levels of calcium, available phosphorus and crude protein that are representative of industry feeding programs. As the level of calcium and available phosphorus were increased early in lay positive carry-over effects were observed on egg production, eggshell quality, and skeletal integrity. At the end of lay, early dietary phosphorus inclusion level increased egg weight (P .05). Humeral bone mineral density (mg/cc) was more closely correlated with humeral speed of sound (m/s) (R2 = .43-.46, P .05). There were no dietary effects on cortical bone mineral density measured with Axial X-Ray Micro-Computed Tomography (micro-CT) for layers at 66 weeks of age (P > .05). Differentiation between trabecular and medullary bone in the femoral cavity was not possible due to similar radiographic densities for both of these bone types
Metabolizable energy studies in broilers
No full textExperiments were conducted with the aim of assessing AME and AMEn content of broiler diets and ingredients as well as determining energy utilization in growing broilers. The use of the conventional nitrogen correction factor yielded AMEn values that were 4-5% lower than AME values for complete broiler diets. Based on observations of complete diets, measures of diet AMEn content were less variable than AME content. With high protein ingredients, such as soybean meal (SBM), the use of N correction heavily penalizes (10-12%) its energy value in comparison to lower protein ingredients like corn (2-5%). For corn, AME and AMEn were little affected by birds age. The effect of nitrogen correction was consistent at around 3%. On the other hand, AME and AMEn contents of SBM were more variable and dependant on the bird age. Increasing either AME or AMEn content of diets did not influence growth performance (P>0.05), but increased deposition of abdominal fat (P<0.01). Estimates of daily maintenance energy requirements (MEm) in broilers were 155 kcal per kg BW0.60 and 143 kcal per kg BW0.75 . This difference becomes more obvious for younger and/or smaller birds. Within the experimental period of 0-42 days, broilers deposited body fat and protein that together represented 35 to 40% of their daily ME intake. However, MEm requirements represented 42-49% of metabolizable energy intake (MEI). Linear and non-linear models were used to quantify total energy retained (TER), as fat (TERF) and protein (TERP) during growing. These models fit the data reasonably well within the first 42 days of age and could be used to predict TER, TERF and TERP. The results could be used to redefine the energy requirements of growing broilers and be used as a base for performance predictions and production models
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
- …
