1,720,986 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
Typologies and occurrences of skeletal anomalies observed all along the productive chain of gilthead seabream Sparus aurata aquaculture
No full textThe presence of skeletal anomalies in fishes is a by-product of aquaculture and it entails economic, biological and ethical issues. Gilthead seabream and European seabass, Dicentrarchus labrax, have been the first valuable euryhaline species to be reproduced in controlled condition and intensively reared in Mediterranean aquaculture since the 1980s. Nonetheless, detailed information on skeletal anomalies occurrences and typologies all along the productive chain is still lacking in literature. This knowledge could furnish data on trend of skeletal anomalies occurrences and typologies in the different rearing phases, in spite of selections carried out during the productive chain, and information on anomalies in ontogenetic, modeling and remodeling processes of skeletal elements. The final goal is the optimization of rearing conditions for improving Mediterranean aquaculture profits and welfare of reared gilthead seabream. Seabream were sampled from hatchery, ongrowing and commercial size lots from intensive commercial farms. Commercial size seabream were sampled from both off-shore and land-based farms. As many as 874 reared seabream were analyzed for skeletal anomalies and variation in meristic counts and obtained data compared with same-size wild seabream lots. The reared and wild seabream specimens resulted well differentiate onto the basis of the anomalies pattern, with reared lots resulting always more and highly deformed than the wild ones. Some variability in meristic counts was observed also in wild lots, except for pectoral fin radials. The most variable character was the number of caudal rays, both in reared and in wild lots. Some anomalies were present only in some farm. The pre-ongrowing lots showed the highest percentages of anomalous individuals. The number of anomaly typologies augmented with the size of the individuals, conversely to the frequency of severe anomalous individuals which lowered with size. The average number of anomalies for affected seabream was found higher in commercial size lots, and similar in pre-ongrowing and hatchery lots. Severe anomalies mainly affected ongrowing lots with a charge quite similar in all the lots. This study was funded by the Italian Ministry for Agriculture, Food and Forestry Policy (Law 41/82
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
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
Use of meristic counts and skeletal anomalies to assess developmental plasticity of farmed rainbow trout (Oncorhynchus mykiss, Walbaum 1792): a preliminary study
No full textRainbow trout is the longest-standing intensively-reared species in Western countries, where it has been subjected by farmers to selection for productive traits for more than a century. One interesting aspect in this context is to try and understand if prolonged artificial selection has in some way altered the phenotypic plasticity of this species. In this preliminary study, we characterized meristic counts and skeletal abnormalities in two different (Italian and French)rainbow trout strains, reared during on-growing following different approaches (intensive and semi-intensive), in order to analyze whether there are any differences in the skeletal elements and if so, what. Despite the different genetic origin and rearing methodologies to which the lots analyzed were subjected, the occurrences of malformed and seriously malformed individuals were not significantly different, nor were the mean number of anomalies per specimen. The body region most affected by deformities was the caudal vertebral column in both lots, although the French lot was also characterized by an high occurrence of spinal anomalies in the haemal region.
Among the meristic counts, only the number of anal and dorsal rays showed statistically different median values between the two lots
Typologies and occurrences of skeletal anomalies observed all along the productive chain of gilthead seabream Sparus aurata aquaculture.
No full textThe presence of skeletal anomalies in fishes is a by-product of aquaculture and it entails economic, biological and ethical
issues. Gilthead seabream and European seabass, Dicentrarchus labrax, have been the first valuable euryhaline species to
be reproduced in controlled condition and intensively reared in Mediterranean aquaculture since the 1980s. Nonetheless,
detailed information on skeletal anomalies occurrences and typologies all along the productive chain is still lacking in
literature. This knowledge could furnish data on trend of skeletal anomalies occurrences and typologies in the different
rearing phases, in spite of selections carried out during the productive chain, and information on anomalies in ontogenetic,
modeling and remodeling processes of skeletal elements. The final goal is the optimization of rearing conditions for
improving Mediterranean aquaculture profits and welfare of reared gilthead seabream.
Seabream were sampled from hatchery, ongrowing and commercial size lots from intensive commercial farms. Commercial
size seabream were sampled from both off-shore and land-based farms. As many as 874 reared seabream were analyzed for
skeletal anomalies and variation in meristic counts and obtained data compared with same-size wild seabream lots.
The reared and wild seabream specimens resulted well differentiate onto the basis of the anomalies pattern, with reared
lots resulting always more and highly deformed than the wild ones. Some variability in meristic counts was observed also
in wild lots, except for pectoral fin radials. The most variable character was the number of caudal rays, both in reared and
in wild lots. Some anomalies were present only in some farm. The pre-ongrowing lots showed the highest percentages
of anomalous individuals. The number of anomaly typologies augmented with the size of the individuals, conversely to
the frequency of severe anomalous individuals which lowered with size. The average number of anomalies for affected
seabream was found higher in commercial size lots, and similar in pre-ongrowing and hatchery lots. Severe anomalies
mainly affected ongrowing lots with a charge quite similar in all the lots.
This study was funded by the Italian Ministry for Agriculture, Food and Forestry Policy (Law 41/82
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