1,720,956 research outputs found
Constant mean curvature graphs on exterior domains of the hyperbolic plane
No full textWe prove an existence result for non rotational constant mean curvature ends in H2 ×R, where H2 is the hyperbolic real plane. The value of the curvature is h ∈ (0, 12). We use Schauder theory and a continuity method for solution of the prescribed mean curvature equation of exterior domains of H2. We also prove a fine property of the asymptotic behavior of the rotational ends introduced by Sa Earp and Toubiana
Machine learning and artificial intelligence boosting automotive threat intelligence
No full textIn this work we describe an approach to Threat Intelligence activities for Automotive Products. Taking for granted the increased need to have efficient and actionable results of threat and vulnerability intelligence for automotive products (e.g., because of recent regulations UNECE (United Nations Economic Commission for Europe) R155 and norms ISO/SAE 21434), we successfully applied Natural Language modelling and data science techniques to virtual forums devoted to automotive products. This supplies a concrete way to respond in a fast, automated, maintainable, scalable, and cost-effective way to the questions arising for OEMs and suppliers in the area of threat and vulnerabilities intelligence. Examples of questions are: which is my most hacked product? Which functionalities of my products are mostly hacked? The idea and results presented in this work show the path for the next steps needed to implement a complete framework for automotive threat intelligence based on artificial intelligence
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
SUB-RIEMANNIAN HEAT KERNELS AND MEAN CURVATURE FLOW OF GRAPHS.
Full text linkWe introduce a sub-Riemannian analogue of the Bence-Merriman-Osher algorithm (Merriman et al., 1992 [42]) and show that it leads to weak solutions of the horizontal mean curvature flow of graphs over sub-Riemannian Carnot groups. The proof follows the nonlinear semi-group theory approach originally introduced by L.C. Evans (1993) [27] in the Euclidean setting and is based on new results on the relation between sub-Riemannian heat flows of characteristic functions of subgraphs and the horizontal mean curvature of the corresponding graph
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
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