1,721,241 research outputs found
Structure of liquid Li-Ga alloys
No full textThe authors have carried out neutron diffraction measurements for two Li-Ga samples: Li0.50Ga0.50 at 750 degrees C and Li0.77Ga0.23 at 475 degrees C. The Li-Ga system is an example of a system forming ionic alloys. The temperatures were chosen to be slightly above the respective melting points. The composition of the latter sample is not only close to that at which a maximum in the resistivity is observed, it corresponds also to the 'zero-alloy' composition. For both samples evidence for chemical short-range order is found while for the equiatomic composition evidence is obtained that the arrangement of atoms in the first coordination shell as observed in the solid state is preserved upon melting. A simple model using the mean spherical approximation yields structure factors that are in satisfactory agreement with the measured ones
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
CO2 reduction on the Li-Ga liquid metal surface
No full textReducing CO2 emissions is crucial for the future survival of the planet and the demand for innovative technologies to capture and reduce CO2, focusing on global net-zero carbon emissions is growing significantly. Hence, researchers worldwide are investigating approaches to mitigate the greenhouse effect caused by excessive emissions of CO2. Low melting point liquid metals offer promising opportunities to exploit novel chemistry in negative emission technologies. In this paper, a high-yield, safe and on-demand approach based on Li-containing liquid metal for the reduction of CO2 to solid materials at low temperatures and atmospheric pressure is reported. In this process, Li metal plays a major role in driving the dissociation of CO2 to its elemental constituents, carbon and oxygen. During the CO2 reduction process, Li dissolved in gallium liquid metal, diffuses to the liquid-gas interface and reduces CO2 to carbon, while undergoing an oxidation reaction. The resulting crust that forms on the surface of the Li-Ga liquid metal alloy consists of solid carbonaceous materials that can be directly utilized as a supercapacitor, achieving a sustainable process for CO2 reduction. The use of Li-Ga liquid metal alloys enables CO2 conversion at near room temperature producing carbonaceous materials that can be effectively integrated into energy storage systems
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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