1,722,663 research outputs found
Regularity for multi-phase variational problems
Full text linkDe Filippis C, Oh J. Regularity for multi-phase variational problems. JOURNAL OF DIFFERENTIAL EQUATIONS. 2019;267(3):1631-1670.We prove C-1,C-nu -regularity for local minimizers of the multi-phase energy: w bar right arrow integral(Omega)vertical bar Dw vertical bar(p)+a(x)vertical bar Dw vertical bar(q)+b(x)vertical bar Dw vertical bar(s)dx, under sharp assumptions relating the couples (p, q) and (p, s) to the Holder exponents of the modulating coefficients a(.) and b(.), respectively. (C) 2019 Elsevier Inc. All rights reserved
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
The migration and accumulation of radionuclides in the Ravenglass saltmarsh, Cumbria, UK
No full textProfiles of 241Am, 137Cs, 238Pu, 239,240Pu & 24lPu have been studied in four corescollected from the Ravenglass saltmarsh, Cumbria and one core collected from the Irish Sea, near the effluent pipeline of the Sellafield nuclear reprocessing plant. Major and trace elements have also been measured to look at the effects of sediment composition and any redox controls on element redistribution. In addition, almost one hundred surface scrape samples were collected from the Ravenglass saltmarsh and the same radionuclides were measured to study the lateral distribution of radionuclides. Three of the Ravenglass cores have well preserved the history of Sellafield discharge since the plant became operational in 1952. There are no significant post depositional processes and redox changes for all the cores studied. However, one of the saltmarsh cores collected from the front of the marsh shows that surface erosion has occurred. Surface scrape sample results also show that erosion is a significant process which results in the redistribution of sediments within the marsh. The core collected from the Irish Sea adjacent to the effluent pipeline shows sediment mixing has operated and these mixed sediments are the main source of material to the saltmarsh. Using the Sellafield discharge records from 1952 onwards, sediment mixing rates have been estimated using a simple mathematical model and they are inferred to be between 80 % and 90 %. Isotopic ratios of Pu isotopes have been compared to those estimated ratios corresponding to particular sediment mixing rates and show good agreement up to 30 cm below the surface. There is less correlation between Sellafield discharge ratios and measured ratios in cores below 30 cm and this may be due to unreliable discharge data or more likely the advective redistribution of material in the saltmarsh. A contribution of 241Am originating from the decay of 24IPu in cores was determined. The ingrown 241Am contributes significantly to the total 241Am measured. Based on the Sellafield discharge record, it is estimated that approximately 46 % of total 24IAm in the system has originated from the decay of 241Pu discharged from the plant since 1952. Spatial distribution of radionuclides in the Ravenglass saltmarsh is controlled by sediment accumulation associated with tidal inundation frequency and the clay content in the sediments. Surface erosion also plays a major role in redistributing saltmarsh sediment labelled with older Sellafield discharge within the marsh together with the sediments originated from the River Esk
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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