1,721,844 research outputs found
Andrew Stephen Allen
No full textAndrew Stephen Allen was the fourteenth child of David Alansen Allen and Chastina Hadlock Allen
Detection of hydrogen embrittlement in steel and steel alloys using methods of neutron radiography
Get PDFThesis (M.S.)--Massachusetts Institute of Technology, Dept. of Nuclear Engineering, 1994.by Andrew Stephen Barritt.M.S
Andrew Stephen Hobley, An examination of Roman bronze coin distribution in the Western Empire A.D. 81-192.
No full textMeissonnier J. Andrew Stephen Hobley, An examination of Roman bronze coin distribution in the Western Empire A.D. 81-192.. In: Revue numismatique, 6e série - Tome 159, année 2003 pp. 488-492
Andrew Stephen Hobley, An examination of Roman bronze coin distribution in the Western Empire A.D. 81-192.
No full textMeissonnier J. Andrew Stephen Hobley, An examination of Roman bronze coin distribution in the Western Empire A.D. 81-192.. In: Revue numismatique, 6e série - Tome 159, année 2003 pp. 488-492
Oxygen sensing and oxide formation: Optimisation and novel X-ray studies
No full textPlatinum remains vital for the use of electrochemical devices, therefore, understanding of the reactions which occur at the platinum-solution interface is paramount in continuing to improve gas sensors, as well as fuel cells and electrolysers. The following body of work uses a number of electrochemical techniques and X-ray spectroscopies to investigate the surface processes of platinum in acidic media.The pH range over which the electrochemical behaviour can be accurately modelled by the Nernst equation, has been extended into highly acidic solutions by employing the Hammett acidity function (H0) in place of pH when working below pH 1. Sulfuric acid and perchloric acid have been investigated. Both the hydrogen region and oxide formation region have been studied, and the comparison between these two potential regions by cyclic voltammetry has produced a method for electrolyte concentration measurements.A variety of X-ray spectroscopies have been used to provide additional understanding of the oxide formation process on platinum. Conventional X-ray Absorption Near Edge Structure (XANES) and Extended X-ray Absorption Fine Structure (EXAFS) have presented a baseline for High Energy Resolution Fluorescence Detection (HERFD)-XANES, which offers higher spectral resolution, and Energy Dispersive EXAFS (EDE), which can measure on much smaller time scales. The surface oxidation and reduction of platinum nanoparticles will be discussed.Additionally, a statistically designed set of experiments have been presented, investigating five parameters in an industrial gas sensor electrode manufacturing process. Both sensor output measurements and lab based techniques were employed to characterise the electrodes. It was shown that the electrode loading could be reduced without affecting the sensors initial performance, so cheaper electrodes can be used
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
Regulation of eicosanoid enzyme expression in inflammatory leukocytes in asthma
No full textSIGLEAvailable from British Library Document Supply Centre-DSC:DXN023765 / BLDSC - British Library Document Supply CentreGBUnited Kingdo
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
- …
