1,720,985 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
Linked Regularities in the Development and Number of Retinal Cells in New World Primates
No full textii, 36 p.The developmental mechanisms that produce the primate eye must use cellular
mechanisms to solve the functional challenges of spatial resolution and pattern
detection within the bounds of the general vertebrate body plan. It has been found
that general eye size and morphology are predictable from whole body size, and the
neuronal constituents of the eye are very predictable from brain size, but both are
modifiable to suit particular visual niches (eg. night, twilight and day). The goal of
this research was to gather comparative information on scaling and niche-specific
adaptations of primate eyes in order to locate deviations from such predictions.
Data was compiled on the number and distribution of rods, cones, rod bipolars, and
M- and P- retinal ganglion cells in New World primates. Future research may
provide clues as to how alterations in developmental programs produce deviations,
and thus how~primate development changes to produce primate evolution.Department of Psychology. Cornell University. Ithaca, New York.Department of Neurobiology and Behavior. Cornell University. Ithaca, New York
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
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
The Postnatal Development of the Visual Corticopontine Projection in the Hamster
No full textv, 47 p.The adult mammalian cortex is divided into a number of different
functionally distinct areas, each forming very specific connections with other
areas of the brain. But exactly how hardwired are these connections? A major
concern in the study of cortical development is how such distinct areas, including
the specificity of their connections, develop. Some studies show that the
developing cortex is just as differentiated as the adult while other studies reveal
that early cortex is fairly uniform and becomes transformed and differentiated
throughout development by the input it receives.
By removing the lateral geniculate nucleus (LON) in the thalamus, visual
cortical axons are forced to develop without thalamic input. A study of the visual
corticopontine projection in the hamster in this situation shows a dramatic
increase in the extent of arborization within the pons as compared to the normally
developing corticopontine tract (M. Kingsbury, personal communication). In
order to discover the role thalamic input plays in cortical development, the normal
development of this tract in the hamster was studied. It was discovered that while
there seems to be a period of exuberance during development, it is not as great as
that observed in the thalamic lesioned brains. It appears as though developing
cortex void of thalamic input fails to undergo the process of refinement while at
the same time increases the amount of secondary sprouting. The exuberance in
these brains, which is not found at any time during development, proves how
plastic connections may be, while at the same time is likely to profoundly affect
the functional capabilities of other areas.With honors
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