1,721,101 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
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
Quantitative structural analysis of peripheral airways and arteries in sudden fatal asthma
No full textThe peripheral airways and the adjacent muscular pulmonary arteries were studied by morphometric methods in the autopsy lungs of six asthmatic subjects who died suddenly during an asthma attack, and they were compared with those of six control subjects who died of other causes and had no history of respiratory diseases. Bronchioles of asthmatic subjects had an increased amount of lumen occlusion (p < 0.01), smooth muscle thickness (p < 0.001), and inflammatory infiltrate (p < 0.001), and both mononuclear cells and eosinophils contributed to this increased inflammation. The muscular pulmonary arteries adjacent to occluded and inflamed bronchioles did not have the morphologic features of chronic hypoxia, as shown by the normal medial and intimal thickness, but they had an important inflammatory process in their walls that was particularly marked at sites adjacent to airways. Although the functional significance of these findings is unknown, they may be responsible in part for the gas exc..
Middle Miocene quantitative calcareous nannofossil biostratigraphy in the Mediterranean region
No full textThe distribution patterns of selected calcareous nannofossils were investigated by means of quantitative methods in the middle Miocene stratigraphic record of the Mediterranean region. Our goal was to test the reliability of the biohorizons used in various zonations. The biostratigraphic reliability has been evaluated by considering the mode of occurrence of the biohorizons and by their potential of correlation among distant and various facies sections. Most biohorizons used in the standard zonations are of limited utility in the region, because some marker species are missing (Catinaster coalitus, Catinaster calyculus) or poorly represented (Discoaster kugleri). By utilizing distinct changes in the distribution pattern of forms common in the region, like first common and continuous occurrence (FCO), last common and continuous occurrence (LCO), absence (paracme) intervals, besides classical first occurrence (FO) and last occurrence (LO) datums, at least 12-13 biohorizons can be consistently correlated among the considered sections. On the basis of these, we established a set of ten regional biostratigraphic zones and subzones, which can be recognized in various facies sediments. The average time resolution of the proposed zonal system is about 1 m.y., which can be substantially improved by integrating calcareous nannofossil and planktonic foraminifer biostratigraphies. The study of the stratotype sections of the Langhian and Serravallian stages, indicates that the boundary between the two units is approximated by the LO of Sphenolithus heteromorphus, and is not associated with the FO of Discoaster kugleri as assumed previously. The base of the Langhian (lower Miocene/middle Miocene boundary) does not correspond to a calcareous nannofossil zonal boundary; it occurs in the upper part of Zone NN4 (CN3). The state of the Serravallian-Tortonian boundary (middle Miocene/upper Miocene boundary) is discussed. The proposal of defining the boundary by the FO of Neogloboquadrina acostaensis is supported. This biohorizon occurs close to the LO of Helicosphaera walbersdorfensis in the Mediterranean region and close to the FO of Catinaster coalitus in many oceanic area
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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