1,721,077 research outputs found
Formation of large, orientation-controlled, nearly single crystalline Si thin films on SiO2 using contact printing of rolled and annealed nickel tapes
No full textStrain-rate effect on the dynamic behaviours of a rectangular conducting plate
Get PDFThis paper is concerned with thermo-elasto-plastic dynamic response of a conductive
plate in a magnetic pulse field. The influence of the strain rate effect and the temperature
effect are taken into account for the electromagnetic elasto-plastic dynamic transient
response and deformation of the conductive plate which made of strain-rate sensitive
materials. The Johnson-Cook model is employed to study the strain rate effect and the
temperature effect on the deformation of the plate. Basic governing equations are derived
for electro-magnetic field considering the eddy current. The analysis includes the elastoplastic
transient dynamic response and the heat transfer of a conductive rectangular plate,
and then an appropriate numerical code based on the finite element method to
quantitatively simulate the electro-magneto-elasto-plastic mechanical behaviors of the
conductive rectangular plate. The numerical results indicate that the strain rate effect has
to be considered for the conductive plates, especially for those with high strain rate
sensitivity. Comparison of the influence of the temperature effect on the deformation of the
plate with that of the strain rate effect shows that the influence of the temperature effect
on the deformation of a plate is not significant
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
Formation of large highly textured crystalline Si film on SiO2
No full textAmorphous silicon (a-Si) films deposited on oxidized silicon wafers were crystallized to a highly textured form using contact printing of rolled and annealed nickel tapes. Crystallization was achieved by first annealing the a-Si film in contact with Ni tape at 600 degreesC for 20 min in a flowing forming gas (90% N-2, 10% H-2) environment, then removing the Ni tape and further annealing the a-Si film in vacuum for 2 h at 600 degreesC. A needle-like morphology of the crystallization front typical of NiSi2 mediated crystallization was observed. All needles, regardless of their points of origin, belonged to the same [111] family of directions except for the presence of twins and/or type A-B formations, leading to formation of nearly single crystalline regions up to; 20 mm in radius that have their crystal axes oriented the same way in all three directions. Furthermore, the orientational relation between Si grains and Ni tape is observed to be Si[110]parallel toNi[001]. (C) 2003 The Electrochemical Society
Rational Finite Element Formulation for a Membrane Element in Sheet Metal Forming Analysis
No full text4th ICTP in Beijing, China, Advanced Technology of Plasticity 1993
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
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