1,720,968 research outputs found
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
Unmediated and mediated communication equilibria of battle of the sexes with incomplete information
No full textWe consider the Battle of the Sexes game with incomplete information and allow two-sided cheap talk before the game is played. We characterize the set of fully revealing symmetric cheap talk equilibria. The best fully revealing symmetric cheap talk equilibrium, when exists, has a desirable characteristic. When the players' types are different, it fully coordinates on the ex-post efficient pure Nash equilibrium. We also analyze the mediated communication equilibria of the game. We find the range of the prior for which this desirable equilibrium exists under unmediated and mediated communication processes.</p
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
Photoinduced entanglement in a magnonic Floquet topological insulator
No full textWhen irradiated via high-frequency circularly polarized light, the stroboscopic dynamics in a Heisenberg spin system on a honeycomb lattice develops a next-nearest-neighbor (NNN) Dzyaloshinskii-Moriya (DM) type term, making it a magnonic Floquet topological insulator. We investigate the entanglement generation and its evolution on such systems, particularly an irradiated ferromagnetic XXZ spin-12 model in a honeycomb lattice as the system parameters are optically tuned. In the high-frequency limit, we compute the lowest quasienergy state entanglement in terms of the concurrence between nearest-neighbor (NN) and NNN pair of spins and witness the entanglement transitions occurring there. For the easy-axis scenario, the unirradiated system forms a product state but entanglement grows between the NNN spin pairs beyond some cutoff DM strength. Contrarily in the easy-planar case, NN and NNN spins remain already entangled in the unirradiated limit. It then goes through an entanglement transition which causes decrease (increase) of the NN (NNN) concurrences down to zero (up to some higher value) at some critical finite DM interaction strength. For a high frequency of irradiation and a suitably chosen anisotropy parameter, we can vary the field strength to witness sudden death and revival of entanglement in the Floquet system. Both exact diagonalization and modified Lanczos techniques are used to obtain the results up to 24 site lattice. We also calculate the thermal entanglement and obtain estimates for the threshold temperatures below which nonzero concurrence can be expected in the system
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
Uncovering the Fractal Nature of Water Vapor Distribution above the Surface of the Earth
Get PDFFractals have been at the heart of geophysical and geospatial studies in the
recent past. We examine the emergent fractal character of water vapor
distributions above the surface of the Earth as a function of both image
resolution (number of pixels) and moisture content percentile. We calculate
physically relevant quantities such as fractal dimension, number of clusters,
and size of the largest cluster with varying vapor percentile using
computational methods and algorithms. Our analysis unravels a potential
multi-fractal character of the data which we construct using the box-counting
method to calculate the generalized dimension. We examine the nature of the
percolation that occurs as the vapor percentile is varied and comment on the
universality class of the transition. We test the applicability of Korcak's law
on our system and determine the quality of the fit using the
Kolmogorov-Smirnoff statistic. We show that the fractal character of the
distribution is exact as a function of image resolution and approximate in some
regimes as a function of the vapor percentiles.Comment: 19 pages, 21 figure
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
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