1,721,036 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
Hordeum vulgare (variety Nure),cytosolic Glucose 6-phosphate dehydrogenase (cyt-G6PDH), cDNA (Accession number FJ790424)
No full textAppropriate 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
PCBs and PCDD/PCDFs in fishery products: occurrence, congener profile and compliance with European Union legislation.
No full textPCB and PCDD/F concentrations and congener specific profiles were determined in seafood (fish, cephalopods,
crustaceans) purchased in supermarkets in Southern Italy. The results intended to assess and
compare the levels and congener profiles among the various organisms and evaluate whether the pollutant
concentrations exceed the maximum permitted levels according to European Union guidelines.
Contaminant accumulation followed the order PCBs > PCDFs > PCDDs in all samples. Species-specific
bioaccumulation of contaminants and differences in PCB and PCDD/F profiles among the three different
groups of seafood were noted. Pollutant concentrations, given as sum of WHO-TEQ, in all samples (fish:
0.28 pg g−1 wet wt; cephalopods: 0.01 pg g−1 wet wt; crustaceans: 0.03 pg g−1 wet wt) did not exceed the
maximum limits for human consumption. Also the sum of six indicator PCBs (fish: 0.07–16.7 ng g−1 wet
weight; cephalopods: 0.05–0.21 ng g−1 wet weight; crustaceans: 0.07–0.57 ng g−1 wet weight) was below
the level prescribed by the legislation in all the species tested. The estimated dietary intakes (fish: 0.52
TEQs/kg bw/week; cephalopods: 0.01 TEQs/kg bw/week; crustaceans: 0.02 TEQs/kg bw/week) were below
the tolerable weekly intake (TWI) proposed by the European Commission. Therefore, the samples analyzed
can be considered safe considering the levels obtained and the in-force legislation
Advanced Applications for Protein and Compounds from Microalgae
Full text linkAlgal species still show unrevealed and unexplored potentiality for the identification of new compounds. Photosynthetic organisms represent a valuable resource to exploit and sustain the urgent need of sustainable and green technologies. Particularly, unconventional organisms from extreme environments could hide properties to be employed in a wide range of biotechnology applications, due to their peculiar alleles, proteins, and molecules. In this review we report a detailed dissection about the latest and advanced applications of protein derived from algae. Furthermore, the innovative use of modified algae as bio-reactors to generate proteins or bioactive compounds was discussed. The latest progress about pharmaceutical applications, including the possibility to obtain drugs to counteract virus (as SARS-CoV-2) were also examined. The last paragraph will survey recent cases of the utilization of extremophiles as bio-factories for specific protein and molecule production
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