1,720,977 research outputs found
First records of the rare starfish Marginaster capreensis (Gasco, 1876) (Echinodermata, Asteroidea, Poraniidae) in the Strait of Sicily and further information on its recent finding in the Ionian Sea
No full textFirst records of the rare starfish Marginaster capreensis (Echinodermata: Poraniidae) for the Strait of Sicily are reported. Two specimens
were collected in 2004 at 87m and 136m depth on the off-shore African shelf. Detailed information on the first specimen, recently reported
in literature from the Ionian Sea, is also given. It was collected in 2000 at 707-742 m depth off the Corfù island (Eastern Ionian)
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
Oxidation reaction of Scapharaca inaquivalvis hemoglobins with nitrate
No full textThe oxidation reaction with nitrite of the dimeric and tetrameric hemoglobins from the mullosc Scapharca inaequivalvis has been studied kinetically and at equilibrium. In line with previous findings obtained with ferricyanide as oxidant, in both proteins the stable oxidation product is a hemichrome, although the nitrite-methemoglobin complex is formed in significant amount when excess nitrite is employed. The reaction kinetics are characterized by a lag period followed by an autocatalytic phase, as in the case of human hemoglobin. However, with respect to human hemoglobin, in the two molluscan proteins the lag phase is prolonged significantly due to the instability of their met-form, an obligatory intermediate for the onset of autocatalysis. All the data obtained in spectrophotometric, EPR and sedimentation velocity experiments under a variety of experimental conditions conform to the reaction mechanism proposed for human hemoglobin (Spagnuolo et al., Biochim. Biophys. Acta 911 (1987) 59-63) provided hemichrome formation and nitrite binding are taken into account. © 1988
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
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