1,721,033 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
Hydroxytyrosol stimulates neurogenesis in aged dentate gyrus by enhancing stem and progenitor cell proliferation and neuron survival
No full textThe dentate gyrus of the hippocampus is one of two brain areas generating throughout
life new neurons, which contribute to the formation of episodic/associative memories.
During aging, the production of new neurons decreases and a cognitive decline
occurs. Dietary factors influence neuronal function and synaptic plasticity; among
them the phenolic compound hydroxytyrosol (HTyr), present in olive oil, displays
neuroprotective effects. As age impacts primarily on the hippocampus-dependent
cognitive processes, we wondered whether HTyr could stimulate hippocampal neurogenesis
in vivo in adult and aged wild-type mice as well as in the B-cell translocation
1 gene (Btg1) knockout mouse model of accelerated neural aging. We found
that treatment with HTyr activates neurogenesis in the dentate gyrus of adult, aged,
and Btg1-null mice, by increasing survival of new neurons and decreasing apoptosis.
Notably, however, in the aged and Btg1-null dentate gyrus, HTyr treatment also
stimulates the proliferation of stem and progenitor cells, whereas in the adult dentate
gyrus HTyr lacks any proliferative effect. Moreover, the new neurons generated in
aged mice after HTyr treatment are recruited to existing circuits, as shown by the
increase of BrdU+/c-fos+ neurons. Finally, HTyr treatment also reduces the markers
of aging lipofuscin and Iba1. Overall, our findings indicate that HTyr treatment
counteracts neurogenesis decline during aging
Local identity and the role of individual differences in the use of natural resources: The case of water consumption
No full textA field study assessed the role of social value orientation (SVO) and identification with the local community on water conservation behavior in Italy. Participants (N = 758) completed a self-reported questionnaire, during summer and Easter time. It was expected that SVO and local identification would affect cooperation in conserving water resources. Consistent with the hypotheses, the highest levels of voluntary cooperation were detected among prosocial persons with high local identity, while the lowest levels of cooperation were detected among proself persons with low local identity. Other factors (e.g., perception of local authority's legitimacy, place of residence, severity of water scarcity condition) did not affect the hypothesized interaction. The theoretical and practical implications of the findings are discussed
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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