1,721,054 research outputs found
An analysis of the morphology and volcano-tectonic structure of the Central Indian Ridge between 18º and 21ºS
No full textThe Central Indian Ridge (CIR) between 18° and 21°S shows significant morphological variation at a relatively constant spreading rate (between 47 and 51mmyr-1). High resolution TOBI sidescan sonar data (cruise CD127) and multibeam bathymetry data (Magofond 2 cruise), complemented by regional geophysical and geochemical datasets, provide an important opportunity to examine the processes controlling morphological and volcano-tectonic variations along the CIR. The CIR is situated on an elevated plateau formed from a temporally persistent and robust melt supply to the ridge axis. Analysis of the data shows that the fracture zones have a significant structural control on along-axis morphology and melt supply, partitioning the ridge into three morphologically defined regions. The central region (Region B) bounded by two of the fracture zones, contains segments which show rifted axial morphologies characteristic of slow-spreading ridges. Regions A and C show patterns of variable volcanic robustness along-axis associated with the supply and availability of melt to the ridge. Tectonic analysis correlates with inter- and intra-segment trends in morphology and volcanic structure, further highlighting regions of robust or deficient melt supply. Strong relationships are also revealed between the tectonic parameters of fault length, spacing and density along-axis. Finite difference analysis is used to model the Non-Transform Discontinuities along the CIR and Mid-Atlantic Ridge to understand patterns of strain within their interiors. The results indicate the presence of a damage zone ahead of a propagating segment tip, providing increased crustal permeability and a greater potential for hosting hydrothermal circulation. Analysis of geochemical data along the CIR identifies five hydrothermal plume signatures, three of which are coincident with the locations of NTDs in the study area, correlating with the findings of the numerical analysis. A detailed model of the CIR demonstrates that thermal variation influenced by ridgestructure can produce significant variations in morphology and volcano-tectonic distribution at a constant spreading rate
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
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
Signal 3: Ethnographic experiences in the American theme park industry
No full textThis dissertation investigates the social, political and historical dimensions of the American theme park industry. Specifically, the research seeks to ethnologically analyze the "American theme park" as a multi-faceted space of socio-cultural formation, reformation, contestation and representation. Through a multi-sited approach, the thesis investigates theme parks, both extinct and extant, from the everyday perspectives of patrons and workers, in the closed rooms of designers, managers and elite decision-makers, and in the numerous spaces of material culture, multi-media representation and design which so makeup the place of study. The ethnographic research is based on two-years of participant-observation at a major American theme park, where the author was a trainer, as well as two years of subsequent research in over twenty additional theme parks and amusement venues, like Las Vegas casinos, throughout the country. As "edge work," the author investigates the complexities of representation, authorship and fieldwork as they emerge in a textual and performative scene of writing and evocation, ultimately challenging distinctions of ethnography and fiction
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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