1,720,955 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
HABITAT SUITABILITY AND REINTRODUCTION POTENTIAL FOR PUMA CONCOLOUR IN THE STATE OF GEORGIA
No full textThe identification of suitable habitat sites for potential reintroduction or natural recolonization is an important step in the recovery of an endangered species. Since the early 20th century, there has not been evidence of a breeding population of cougars (Puma concolour) east of the Mississippi River, except an isolated population in southern Florida. During the latter half of the 20th and 21st centuries, cougar presence (photographs, tracks, scat, etc.) has been documented in historic ranges where cougars were thought to be extirpated east of the Mississippi River. Currently, one subspecies of cougar, the Florida cougar (P. c. coryi), is listed as an endangered species and the Florida Panther Recovery Plan has been created to aid conservation efforts. Criteria for delisting the subspecies require the establishment of three viable, self-sustaining breeding populations of at least 240 adult and subadult cougars. There is a pressing need to conserve critical habitat and identify potential reintroduction sites in the face of increasing anthropogenic encroachment. The purpose of this master’s project was to identify suitable sites to reintroduce the cougar in the state of Georgia.
I used environmental variables to identify primary cougar habitat zones across the state. As a reintroduced species, cougars would require habitat of considerable size to ensure long-term survival (>100 years) and genetic health of a source population. For reintroduction, a population of 240 cougars requires about 13,000 km2 of habitat (2-3 cougars per 100 km2). My analyses revealed 14 primary habitat zones, grouped geographically into five habitat regions. Two of these regions, one in northeastern and one in southern Georgia (Chattahoochee N.F. and Okefenokee N.W.R. respectively), have networks of connected habitat capable of supporting significant breeding populations of cougars. I identified three additional habitat regions capable of supporting breeding populations of smaller sizes and/or dispersing cougars. Previously estimated deer densities per management unit as well as the wide distribution of feral swine indicate the availability of an ample prey base. Based on the availability of habitat and prey, combined with the relative lack of development surrounding candidate sites, the USFWS could designate these areas as critical habitat and reintroduce the Florida cougar in the state of Georgia
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
Phylogeography and spatial modeling of the leopard (Panthera pardus) in sub-Saharan Africa
No full textThe leopard, Panthera pardus, is a large, wide-ranging carnivore that is rapidly disappearing from its once contiguous and expansive historic range. Research supports the theory that wide-ranging species exhibiting discontinuity within their range are likely to exhibit variation at the molecular level; patterns of genetic diversity tend to correspond to distinct geographic regions. This study explores previous research used to describe leopard taxonomy and uses new data with an emphasis on museum-based collections to reassess genetic diversity and status of African leopards. Mitochondrial analyses revealed the spatial aggregation of genetically distinct populations of leopards in at least four large geographic regions across sub-Saharan Africa. Populations in West and Coastal-West-Central Africa exhibited levels of genetic divergence comparable to currently recognized subspecies in the Middle East (Arabian, P. p. nimr) and Southwest Asia (Persian, P. p. saxicolor). Star-like phylogeny surrounding the dominant haplotype in Central-East Africa and connecting to each other population suggests origin of the ancestral matrilineage. Species distribution modeling software was used to explore the availability of suitable leopard habitat across continental Africa. Model predictions of habitat suitability were relatively close to expert delineated leopard ranges. Leopard habitat was found to be closely correlated with NDVI, a direct measurement of primary productivity, and an indirect measurement of habitat, forest cover, and prey availability. Minimal habitat was predicted within protected areas highlighting the importance and need of leopard and wildlands conservation outside of protected areas. This study has laid the foundation for reassessing the taxonomic status of the African leopard by providing firm evidence against the leopard as panmictic across Africa. Furthermore, this study provides insight into possible explanatory variables useful to conservationists and wildlife managers when evaluating and assessing potentially viable leopard habitat
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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