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40 results for “lucas”
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Research ArticleOpen accessIn the author namesMeasuring Test Data Uniformity in Acceptance Tests for the FitNesse and Gherkin NotationsDouglas Hiura Longo, Patrícia Vilain, Lucas Pereira da SilvaThis paper presents two metrics designed to measure the data uniformity of acceptance tests in FitNesse and Gherkin notations. The objective is to measure the data uniformity of acceptance tests in order to identify projects with lots of random and meaningless data. Random data in acceptance tests hinder communication between stakeholders and increase the volume of glue code. The main … …Journal of Computer Science, Vol. 17, Issue 2 · 25 Feb 2021 · 7,572 accessesView PDFCite
Research ArticleOpen accessIn the author namesEstόria: A Framework for Code and Execution Reuse between Test ClassesLucas Pereira da Silva, Patrícia VilainManual implementation of test code can lead to maintainability problems such as test code duplication. Strategies to avoid test code duplication and to promote test code reuse exist in the literature. However, it becomes increasingly difficult to apply these strategies as the system evolves and the number of test increases. In this study, we present a novel strategy to reuse … …Journal of Computer Science, Vol. 17, Issue 2 · 11 Feb 2021 · 7,019 accessesView PDFCite
Review ArticleOpen accessIn the author namesExplaining the Generalized Cross-Validation on Linear ModelsLucas Monteiro Chaves, Laerte Dias de Carvalho, Carlos José dos Reis, Devanil Jaques de SouzaCross-Validation is a model validation method widely used by the scientific community. The Generalized Cross-Validation (GCV) is an invariant version of the usual Cross-Validation method. This generalization was obtained using the non usual theory of circulant complex matrices. In this work we intend to give a clear and complete exposition concerning the linear algebra assumptions required by the theory. The … …Journal of Mathematics and Statistics, Vol. 15, Issue 1 · 25 Oct 2019 · 10,450 accessesView PDFCite
Literature ReviewOpen accessIn the author namesPolitical Rhetoric or Policy Shift: A Contextual Analysis of the Pivot to AsiaLucas Bittick, Timothy SandsSociety lays witness to the rise and fall of civilizations throughout history. Following a proud past, in recent times China has suffered low-years whose fall was precipitated by experiments in poor governance exacerbated by relatively better-governed states leveraging Chinese weakness to their own benefit. In the century, China has abandoned failed governance schemes and is again on the rise in … …Journal of Social Sciences, Vol. 15, Issue 1 · 17 Aug 2019 · 7,759 accessesView PDFCite
Research ArticleOpen accessIn the author namesSolutions of the Duffing and Painlevé-Gambier Equations by Generalized Sundman TransformationDamien Kolawolé Kêgnidé Adjaï, Lucas Hervé Koudahoun, Jean Akande et al.A new approach using the generalized Sundman transformation to solve explicitly and exactly in a straightforward manner the cubic elliptic Duffing equation is proposed in this study. The method has the advantage to closely relate this equation to the linear harmonic oscillator equation and to be applied to solve other nonlinear differential equations. As a result, explicit and exact general … …Journal of Mathematics and Statistics, Vol. 14, Issue 1 · 8 Nov 2018 · 7,251 accessesView PDFCite
Research ArticleOpen accessIn the author namesOn the General Solution to the Bratu and Generalized Bratu EquationsLucas Hervé Koudahoun, Jean Akande, Damien Kêgnidé Kolawolé Adjaï et al.This work shows that the Bratu equation belongs to a general class of Liénard-type equations for which the general solution may be exactly and explicitly computed within the framework of the generalized Sundman transformation. In this perspective the exact solution of the Bratu nonlinear two-point boundary value problem as well as of some well-known Bratu-type problems have been determined. …Journal of Mathematics and Statistics, Vol. 14, Issue 1 · 14 Jul 2018 · 7,686 accessesView PDFCite
Research ArticleOpen accessIn the author namesExact Classical and Quantum Mechanics of a Generalized Singular Equation of Quadratic Liénard TypeLucas H. Koudahoun, Jean Akande, Damien K.K. Adjaï et al.Authors introduce a generalized singular differential equation of quadratic Liénard type for study of exact classical and quantum mechanical solutions. The equation is shown to exhibit periodic solutions and to include the linear harmonic oscillator equation and the Painlevé-Gambier XVII equation as special cases. It is also shown that the equation may exhibit discrete eigenstates as quantum behavior under Nikiforov-Uvarov … …Journal of Mathematics and Statistics, Vol. 14, Issue 1 · 5 Jul 2018 · 7,609 accessesView PDFCite
Research ArticleOpen accessIn the author namesStatistical Pattern Recognition for Thresholding between Human Skin and Background in Color ImagesRafael Divino Ferreira Feitosa, Vinícius Araújo Santos, Leandro Luís Galdino de Oliveira et al.Many research works based on the tone of human skin have been developed to locate and track the human body for the purpose of recognition in color images. With respect to other techniques, some advantages of face detection based on skin color are the smaller processing time, invariant angles of rotation and the performance in semi-occluded faces. In this study … …Journal of Computer Science, Vol. 13, Issue 2 · 10 Apr 2017 · 7,923 accessesView PDFCite
Research ArticleOpen accessIn the author namesA Fast-and-Fair Collision Resolution Protocol Tailored for Ad Hoc Wireless NetworksMarcos F. Caetano, Lucas M. Guimaraes, Jacir L. BordimWireless technologies have permeated a significant number of devices over the years. On the other hand, Medium Access Control (MAC) protocols strive to deal with an increasing number of contending nodes on crowded frequency bands. This work presents an efficient medium access control resolution protocol. The proposed protocol, termed Collision Resolution Protocol (CRP), uses pulse/tone signaling that works in both … …Journal of Computer Science, Vol. 12, Issue 8 · 1 Nov 2016 · 7,140 accessesView PDFCite
Research ArticleOpen accessIn the author namesImmune Response, Detection of IgE and PGE2 during Vaginal Candidiasis in MiceRosymar Coutinho Lucas, Rafael Taglialegna, Carolina Nunes França et al.Vulvovaginal candidiasis is an opportunistic infection that affects most women in adult life, but the defense mechanism remains to be elucidated. Animals treated with estradiol were inoculated with Candida albicans having high virulence power. The experimental control consisted of animal groups treated with estradiol and animals without treatment that were inoculated with physiologic serum. The vaginal wall was collected, at … …American Journal of Immunology, Vol. 12, Issue 2 · 14 Jul 2016 · 6,976 accessesView PDFCite