1,720,957 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
Abnormal development of paired enigmatic structures in the derived dicynodont Lystrosaurus murrayi (Therapsida, Anomodontia).
No full textDerived dicynodonts, including Lystrosaurus murrayi, have edentulous lower jaws. As an interesting
exception to this conventional wisdom, a well-preserved specimen of L. murrayi (MGGC-
8850/1RE13 F) has abnormal, paired mandibular structures similar in overall morphology to dental
teeth. The specimen pertains to the historical collections of the Museo G. Capellini (Bologna, Italy)
and was collected in 1929 by M. Gortani during prospecting activities near Harrismith, South Africa.
The specimen is articulated and includes a nearly complete skull, the first eight vertebrae and the
proximal end of the right scapula. Reconstruction based on a Dual-Beam CT revealed unusual,
paired structures similar to mandibular teeth, encased within the lower jaw, lingual to maxillary tusks.
Different interpretations are possible for the abnormal mandibular structures in MGGC-8850/1RE13
F: 1) the dental lamina in the lower jaw, which would normally degenerate in derived dicynodonts,
remained active and potentiated the odontogenesis; 2) the dental lamina was potent in the lower jaw
throughout the ontogeny across dicynodonts but activated differentially; or 3) the mandibular
patterning in our specimen was dorsalized, which resulted in an ectopic formation of upper jaw
dentition in the lower jaws. Supranumerary or ectopic teeth are a commonly screened phenotype in
modern mammalian models. Such variation distributes in a continuum – rarely does an edentulous
jaw develop fully functional teeth that are present in outgroups. The absence of mandibular dentition
in other specimens of L. murrayi and in most other bidentalian dicynodonts suggests that MGGC-
8850/1RE13 F represents a rare developmental abnormality or a case of atavism
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
Morphometric maps of bilateral asymmetry in the human humerus: An implementation in the R package morphomap
Full text linkIn biological anthropology, parameters relating to cross-sectional geometry are calculated in paired long bones to evaluate the degree of lateralization of anatomy and, by inference, function. Here, we describe a novel approach, newly added to the morphomap R package, to assess the lateralization of the distribution of cortical bone along the entire diaphysis. The sample comprises paired long bones belonging to 51 individuals (10 females and 41 males) from The New Mexico Decedent Image Database with known biological profile, occupational and loading histories. Both males and females show a pattern of right lateralization. In addition, males are more lateralized than females, whereas there is not a significant association between lateralization with occupation and loading history. Body weight, height and long-bone length are the major factors driving the emergence of asymmetry in the humerus, while interestingly, the degree of lateralization decreases in the oldest individuals
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