1,721,000 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
Factors influencing the nursery dynamics of juvenile bull sharks in two estuaries along the Texas coast
Full text linkNursery habitats provide refuge for juvenile organisms to grow and develop, and are utilized by several shark species, including bull sharks (Carcharhinus leucas). Bull sharks utilize estuaries adjoining the Gulf of Mexico as nursery habitat, and are the most abundant shark species found along the Texas coast. Little is known about their nursery dynamics in this region, especially for the young-of-the-year (YOY) age class. This study investigated how predation risk and abiotic factors influenced the occurrence and densities of YOY bull sharks in two Texas estuaries: San Antonio Bay and Sabine Lake using in-situ drumline sampling and historical long-term gillnet monitoring (1985-2018). In San Antonio Bay, the densities of larger sharks posing a threat to YOY bull sharks was highest in the months of May and June, and significantly influenced by location within the estuary. No predatory sharks were sampled in Sabine Lake, suggesting that this entire estuary may serve as important nursery habitat. In both systems, densities of YOY bull sharks were highest in low salinity waters near river mouths, and in San Antonio Bay, lower predation risk was a significant factor predicting densities of YOY bull sharks. YOY bull shark densities were also influenced by temperature, dissolved oxygen, and location within the estuary. Understanding the effects of changing environmental conditions on predation risk and YOY bull shark habitat use allows us to better understand shark nursery dynamics along the Texas coast, and identify important nursery habitats for this estuarine predator
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
Species Composition, Relative Abundance, and Environmental Effects on Demersal Fishes in the Northwestern Gulf of Mexico
Full text linkSpecies composition and abundance are important metrics to identify when addressing community structure and ecosystem health due to variable environmental factors. Data collected from the Texas Parks and Wildlife Department bottom longline survey was used to examine species composition, relative abundance and environmental effects on demersal fishes caught along the continental shelf of the northwestern Gulf of Mexico. Surveys from 195 locations in the northwestern Gulf of Mexico also included environmental data: salinity, temperature, dissolved oxygen, and depth. Generalized additive models were used to assess trends in richness, diversity, evenness, and relative abundance; and generalized linear models with binomial distributions were used to assess significant effects of collected environmental data on predicted presence probabilities of dominant species from the survey. A total of 2,802 individuals were caught during the survey consisting of 56% elasmobranchs and 44% bony fishes. Species richness, diversity and relative abundance were mainly affected by region, year, and depth. Six species accounted for 93% of the total catch including blacktip sharks Carcharhinus limbatus, Atlantic sharpnose sharks Rhizoprionodon terraenovae, gafftopsail catfish Bagre marinus, red drum Sciaenops ocellatus, spinner sharks Carcharhinus brevipinna, and bull sharks Carcharhinus leucas. Region and the interaction between temperature and dissolved oxygen were the most common significant effects on species presence. Results from this study provide baseline data for demersal fishes in the northwestern Gulf of Mexico, allowing for future evaluations in changes of the species composition and abundance over time
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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