1,720,998 research outputs found
Variational Analysis in Sobolev and BV Spaces: Applications to PDEs and Optimization (Second Edition)
No full textMost of the material of this book comes from graduate level courses on variational analysis, P.D.E., and optimization which have been given during the last decades by the authors: H. Attouch and G. Michaille at the University of Montpellier (France), G. Buttazzo at the University of Pisa (Italy). Our objective is twofold: The first objective is to provide to students the basic tools and methods of variational analysis and optimization in infinite dimensional spaces together with applications to classical P.D.E. problems. This corresponds to the first part of the book, from chapter 1 to 8, and which takes place in classical Sobolev spaces. We have made an effort to provide, as much as possible, a self-contained exposition, and try to introduce each new development from various perspectives (historical, numerical,...). The second objective, which is more oriented towards research, is to present new trends in variational analysis and some of the most recent developments and applications. This corresponds to the second part of the book, from chapter 9 to 15, where in particular are introduced the spaces.
This organization is intended to make the book accessible to a large audience, from students to researchers, with various backgrounds in mathematics, as well as physicists, engineers... As a guideline, we have been trying to portray direct methods in
modern variational analysis. This is just like an anniversary, one century after D. Hilbert delineated them in his famous lecture at Coll\`ege de France, Paris, 1900. The extraordinary success of these methods is intimately linked with the development, all along the century, of new branches in mathematics: functional analysis, measure theory, numerical analysis, (nonlinear) P.D.E., optimization...
We try to show in this book the interplay between all these theories, and also between theory and applications. Variational methods have proved to be very flexible. In recent years, they have been developped in order to study a number of advanced problems of modern technology like composite material, phase transitions, thin structures, large deformations, fissures, shape optimization... To grasp these often involved phenomena, the classical framework of variational analysis, which is presented in the first part, has to be enlarged. This is the motivation for the introduction in the second part of the book of some advances technics, like and spaces, Young measures, -convergence, recession analysis, relaxation methods... Finally, we wish to stress that variational analysis is a remarkable example of international collaboration. Quite all mathematical schools have contributed to its success and it is just like a modest symbol that this book has been written in collaboration between mathematicians of two of them, french and italian. This book owes much to the support of the Universities of Montpellier (France) and Pisa (Italy), of their Mathematical departments, and of the convention of cooperation which connects them
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
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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