1,720,955 research outputs found
Histologic and spectroscopic methods for differentiating fresh from thawed muscle of fish (teleosts): Sensitivity and specificity
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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
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
Validation of NIRS analysis in Authentication of Fresh and Frozen-ThawedFish Products
No full textProviding label information about the preserving method used for fish conservation (eg. chilling or freezing) could have a strong influences on consumer acceptance. Thawed fish is more susceptible to microbial invasion than fresh fish, with a consequent reduction of its shelf life1. This should be strongly considered on management plans, such as the HACCP (Hazard Analysis and Critical Control Point) system, to reach higher standards of seafood quality and safety. The substitution of thawed products labeled as fresh is a common commercial fraud. There are numerous techniques available to distinguish fresh-chilled from frozen-thawed fish, having different performances. This study was the first part of a collaborative trial among different laboratories. The ring trial was carried out to evaluate the discriminating ability of three analytical techniques, a histological method, front-face fluorescence spectroscopy and infrared spectroscopy (IRs). This paper only reports the performances of IRs techniques, in terms of their specificity, sensitivity, accuracy, intra-laboratory reproducibility and agreement with the Standard test for authentication of fresh and thawed Gilthead Sea bream (Sparus aurata) fillets
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
NON-DESTRUCTIVE NON TOUCH VISIBLE-NIR TRANSMITTANCE SPECTROSCOPY FOR IDENTIFICATION OF FRESH AND FROZEN-THAWED FISH
No full textThe online evaluation of the quality and freshness of the seafood is usually done through the employment of trained
operators. This practice is costly in economic terms and requires a period of training of technicians. For certain frauds
(eg. defrosted as fresh) also are not yet available objective assessment criteria, particularly for products already
processed, sliced or filleted. The handling of the product reduces the shelf-life by making the fish susceptible to
microbial growth. This study was carried out to evaluate the discrimination power of a portable Visible-NIR
transmittance spectroscopy on fresh and thawed fish products
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