1,720,961 research outputs found
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
Tectono-metamorphic evolution of the Simano-Adula nappe boundary, Central Alps, Switzerland
No full texthis paper presents a regional study undertaken in the Penninic zone of the Central Alps in southern Switzerland. The studied region is situated on the boundary of the lower Penninic Simano nappe and Adula nappe. The region is characterized by three major phases of deformation designated D1, D2 and D3, and Post-D3 sequentially. During phase D1, the Adula nappe was thrust northwards onto the Simano nappe. Phase D2 represents the main phase of Alpine metamorphism and deformation under upper amphibolite facies conditions. During this event the nappe boundary was isoclinally folded. The structures due to the deformation phase D2 represent the dominant structures in the entire region. Phase D3 corresponds to the backfolding of the Alpine nappe pile. This deformation phase is only locally preserved in the study region. Post-D3 deformation is a brittle deformation of the Alpine nappes under greenschist facies conditions. P-T calculations were carried out using different calibrations of the GARB (garnet- biotite) thermometer and the GASP (garnet–aluminosilicate–quartz–plagioclase) barometer. The average P-T con- ditions obtained for the main metamorphic event D2 are of about 7 kbar and 625 °C. Metapelites of the Adula nappe complex appear to record high-pressure conditions that they once were subjected to in the Alpine subduction zone during Early Tertiary. The difference of pressure conditions was 2 to 4 kbar relative to the Simano nappe in which metapelites seem to record only the Barrovian-type metamorphism of the Central Alps
Tertiary tectono-metamorphic evolution of the European margin during Alpine collision: Example of the Leventina Nappe (Central Alps, Switzerland)
No full textthe Leventina Nappe represents one of the lowermost exposed units in the Alpine nappe stack and corresponds to a slice of the European margin that was entrained into the Alpine continental accretionary prism during the tertiary tectonic event. this study yields details regarding the tectonic and metamor- phic history of the Leventina Nappe, through detailed analysis of structures and shear zone patterns, and the examination of the si-content of white mica along a north-south profile. the Leventina Nappe underwent three phases of ductile deformation. Foliation s1 is mostly sub-parallel to the regionally domi- nant structural fabric (the s2 foliation). s2 foliation is penetratively developed in the structurally higher portions of the Leventina Nappe toward the simano Nappe, while it is only weakly developed in the core of the Leventina Nappe. A 50 to 200 m wide mylonite zone, with a D2 top-to-NW sense of shear marks the boundary to the simano Nappe. throughout the Leventina Nappe only small-scale D2 shear bands (mm to cm wide) are observed, showing a top-to- NW sense of shear. Deformation phase D3 locally generated a vertical axial plane foliation (s3) associated with the large-scale D3 Leventina antiform.
Microtextural evidence and phengite geobarometry were used to con- strain the temperature and pressure conditions of equilibration of the Leven- tina Gneisses. Highest si (pfu) values are preserved in the core of phengitic micas and reflect pressure and temperature conditions of around 8 kbar at 550 °c and 10 kbar at 650 °c in the northern and southern parts of the Leven- tina Nappe, respectively. Lower si (pfu) values from the rims of white micas correspond to a metamorphic pressure of ca. 5 kbar during the exhumation of the unit. these metamorphic conditions are related to the underthrusting of the thinned European margin into the continental accretionary prism during late Eocene time. these new data allow us to propose a kinematic model for the Leventina Nappe during the tertiary Alpine tectonics
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
The tectono-metamorphic evolution of the northwestern Simano Nappe (Central Alps, Switzerland)
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