1,721,389 research outputs found
Herbivory of Leaf Cutting Ants. A Case study in the tropical rainforest of Panama
No full textWirth R, Herz H, Ryel RJ, Beyschlag W, Hölldobler B. Herbivory of Leaf Cutting Ants. A Case study in the tropical rainforest of Panama. Ecological Studies. Vol 164. Berlin, Heidelberg, New York: Springer; 2003
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
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
Depressurized Cavities within High-strain Shear Zones: their Role in the Segregation and Flow of SiO2-rich Melt in Feldspar-dominated Rocks
No full textWe observe void growth and coalescence into cavity-bearing
shear bands during deformation of wet synthetic anorthite aggregates
containing53 vol. % silica-enriched melt. Samples were deformed
in the Newtonian creep regime to high strain during torsion
experiments at 11008C and 400MPa confining pressure. Localized
cavity-bearing shear bands show an S^C’-geometry: the bands
(C’) are oriented at about 308 to the compression direction of the
imposed simple shear and the internal foliation (S) of the bands is
rotated towards the horizontal external shear plane. Cavity-bearing
shear bands started to nucleate in the sample periphery above
a shear strain threshold of 2. Quartz crystallized from the
water-saturated SiO2-rich melt within large cavities inside these
bands, which requires that the melt is decompressed by4200MPa
during their formation. The dynamically evolving cavities are
sites of locally reduced pressure that collect the melt distributed in
the adjacent matrix.Therefore, cavitation damage under ductile conditions
may result in the development of an efficient melt channelling
system controlling SiO2-rich melt flow in the lower crust. Electron
backscatter diffraction analysis shows that the quartz inside the
cavity bands has a crystallographic preferred orientation (CPO).
The development of the CPOis explained by the preferred dissolution
of crystals oriented with the rhombohedra and trigonal dipyramids
orthogonal to the compression direction and by preferential growth of
crystals aligned with their500014axis in the extension direction
of the externally applied simple shear deformation
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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