1,722,621 research outputs found
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
Software prototype of an indoor positioning system for mobile devices
Full text linkEste documento describe el proceso de desarrollo que se llevó a cabo para implementar un prototipo de un sistema de posicionamiento en interiores para dispositivos móviles, con el sistema operativo Android, aplicado a algunos edificios del campus principal de la Universidad Autónoma de Bucaramanga. Usando la tecnología propuesta por la compañía IndoorAtlas, que fue fundada en 2012 como un spin-off de la Universidad de Oulu, Finlandia. IndoorAtlas es la primera empresa del mundo en utilizar anomalías magnéticas dentro de los edificiosyteléfonosinteligentesparalocalizarenlugaresinteriores. Adicionalmente muestra un resumen del estado del arte de los sistemas de posicionamiento en interiores y una caracterización de las APIsde posicionamiento en interiores para dispositivos móviles dispuestas en InternetThis document describes the development process that was carried out to implement a prototype of an indoor positioning system for mobile devices, with the Android operating system, applied to some buildings on the main campus of the Autonomous University of Bucaramanga. Using the technology proposed by the IndoorAtlas company, which was founded in 2012 as a spin-off of the University of Oulu, Finland. IndoorAtlas is the world's first company to use magnetic anomalies inside buildings and smart phones to locate indoors. Additionally, it shows a summary of the state of the art of indoor positioning systems and a characterization of indoor positioning APIs for mobile devices available on the Internet
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
On the Leray-Schauder degree of the Toda system on compact surfaces
Full text linkIn this paper we consider the following Toda system of equations on a compact surface:
−Δu1 = 2ρ1 (h1eu1 − 1) − ρ2 (h2eu2 − 1) ,
−Δu2 = 2ρ2 (h2eu2 − 1) − ρ1 (h1eu1 − 1) .
Here h1, h2 are smooth positive functions and ρ1, ρ2 two positive parameters. In this note we compute the Leray-Schauder degree mod Z2 of the problem for ρi ∈ (4πk, 4π(k + 1)) (k ∈ N). Our main tool is a theorem of Krasnoselskii and Zabreiko on the degree of maps symmetric with respect to a subspace. This result yields new existence results as well as a new proof of previous results in the literature.
Existence of ground states for a modified nonlinear Schrodinger equation
No full textIn this paper we prove the existence of ground state solutions of the modified nonlinear Schro ̈dinger equation:
−u+V(x)u−21uu2 =|u|p−1u, x∈RN, N≥3, under some hypotheses on V (x). This model has been proposed in the theory of superfluid films in plasma physics. As a main novelty with respect to some previous results, we are able to deal with exponents p ∈ (1, 3). The proof is accomplished by minimization under a convenient constraint
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
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