1,720,973 research outputs found
Generalized Wiener-Hopf Equations for Wedge problems involving arbitrary linear media
Full text linkThis paper provides new functional equations in angular regions that turn useful to study wedge problems in presence of arbitrary linear media. The enforcement of the boundary conditions on these equations reduces the wedge problems to Generalized Wiener-Hopf (GWHE) equations that can be approached with standard solution techniques. This procedure is briefly illustrated in this pape
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
A Review on Novel Canonical Scattering Problems Solved by the Wiener-Hopf Technique with the Help of Fredholm Factorization and Network Formalism
Full text linkIn 2010s, Vito Daniele and Guido Lombardi started a new collaboration with Rodolfo S. Zich on the analysis of scattering problems in electromagnetics in spectral domain. Soon, the group selected the Wiener-Hopf technique (WHT) as one of the most promising techniques to develop new canonical solutions with physical insights (V.G. Daniele, R.S. Zich, The Wiener-Hopf Method in Electromagnetics, SciTech Publishing Inc, 2014). The development of WHT has been first extended from rectangular problems, as in classical literature, to angular region problems (V.G. Daniele, G. Lombardi, R.S. Zich, Network representations of angular regions for electromagnetic scattering, PLoS ONE, 12 (8), art. no. e0182763, 2017). Unsolvable problems of factorization were treated with the introduction of a semi-analytical general-purpose factorization method, known as Fredholm Factorization (V.G. Daniele, G. Lombardi, Fredholm factorization of Wiener-Hopf scalar and matrix kernels, Radio Science, 42(06):1-9, 2007). This tool is effective, and it aims to be a technique that avoids cumbersome mathematical specialization often encountered in WH factorization. This evolution of WHT has a strong impact in general application of the method (also in different subjects), and it has a special impact on the analysis of the physics of electromagnetism, since its semi-analytical nature maintains the spectral interpretation of the problems as analytical closed form solutions but at the same time extends the class of solvable problems (V.G. Daniele, G. Lombardi, The Wiener-Hopf Fredholm factorization technique to solve scattering problems in coupled planar and angular regions, In Advances in Mathematical Methods for Electromagnetics, pp. 279–302, SciTech Pub.-IET, 2020). Moreover, one of the main benefits of the proposed semi-analytical solutions is to allow the computation of field components by using asymptotics and analyzing spectral structural and source singularities, similarly to what is done with closed-form spectral solutions (V.G. Daniele, G. Lombardi, and R.S. Zich, The Electromagnetic Field for a PEC Wedge Over a Grounded Dielectric Slab: 2. Diffraction, Modal Field, Surface Waves, and Leaky Waves, Radio Science, 52(12), pp. 1492–1509, 2017). At the same time, the development of this framework has been studied following the paradigm of Bresler and Marcuvitz (A.D. Bresler, N. Marcuvitz, Operator methods in electromagnetic field theory, Report R-495-56, PIB-425, MRI Polytechnic Institute of Brooklyn, 1956) provided for the analysis of stratified media by using transverse equation theory. We apply and extend the same methodology to represent problems of higher complexity where angular regions are combined with rectangular finite regions and stratifications (V.G. Daniele, G. Lombardi, R.S. Zich, Radiation and Scattering of an Arbitrarily Flanged Dielectric-Loaded Waveguide, IEEE Trans. Antennas Propag, 67(12), art.n.8886592, pp.7569-7584, 2019). All these types of basic geometric/material bricks, that decompose complex problems, can now be delt with WH formulations and Fredholm factorization where all equations can be represented by circuit/network modelling that allows to describe the technique with systematic steps avoiding redundancy (V.G. Daniele, G. Lombardi, R.S. Zich, Physical and Spectral Analysis of a Semi-Infinite Grounded Slab Illuminated by Plane Waves, IEEE Trans. Antennas Propag,70(12),pp.12104-12119, 2022). Examples of solved complex scattering problems are proposed in Fig. 1 and they will be discussed during the presentation
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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