67 research outputs found

    Suspension bridge model with laminated beam

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    This manuscript introduces a suspension bridge system where laminated beams model the deck. The action of frictional damping is considered. Well-posedness is proved using the Lumer-Phillips theorem, and the exponential stability is obtained by applying the Gearhart-Huang-PrĂŒss theorem

    Efficient execution of web navigation sequences

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    This version of the article has been accepted for publication, after peer review and is subject to Springer Nature’s AM terms of use, but is not the Version of Record and does not reflect post-acceptance improvements, or any corrections. The Version of Record is available online at: https://doi.org/10.1007/978-3-642-28795-4_15.[Abstract]: Web automation applications are widely used for different purposes such as B2B integration and automated testing of web applications. Most current systems build the automatic web navigation component by using the APIs of conventional browsers. While this approach has its advantages, it suffers performance problems for intensive web automation tasks which require real time responses and/or a high degree of parallelism. In this paper, we outline a set of techniques to build a web navigation component able to efficiently execute web navigation sequences. These techniques detect what elements and scripts of the pages accessed during the navigation sequence are needed for the correct execution of the sequence (and, therefore, must be loaded and executed), and what parts of the pages can be discarded. The tests executed with real web sources show that the optimized navigation sequences run significantly faster and consume significantly less resources.This research was partially supported by the Spanish Ministry of Science and Innovation under projects TIN2009-14203 and TIN2010-09988-E, and the European Commission under project FP7-SEC-2007-01 Proposal N° 218223

    Automatic Optimization of Web Navigation Sequences

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    This version of the article has been accepted for publication, after peer review and is subject to Springer Nature’s AM terms of use, but is not the Version of Record and does not reflect post-acceptance improvements, or any corrections. The Version of Record is available online at: https://doi.org/10.1007/978-3-642-28795-4_15.[Abstract]: Web automation applications are widely used for different purposes such as B2B integration, automated testing of web applications or technology and business watch. In this work-in-progress paper we outline a set of techniques which constitute the basis to build a web navigation component able to analyze a web navigation sequence and automatically optimize it, detecting which parts of the loaded pages are needed, and which ones can be discarded in the following executions of the sequence. Our techniques build on the Document Object Model and the first tests executed with real web sources have found them to be very effective.This research was partially supported by the Spanish Ministry of Science and Innovation under project TIN2010-09988-E, and the European Commission under project FP7-SEC-2007-01 Proposal NÂș 218223

    Parallel JavaScript Execution in Web Navigation Sequences

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    © 2015 IEEE. This version of the paper has been accepted for publication. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. The final published paper is available online at: https://doi.org/0.1109/WI-IAT.2015.165.[Abstract]: Web automation applications are widely used for different purposes such as B2B integration and automated testing of web applications. Most current systems build the automatic web navigation component by using the APIs of conventional browsers. This approach suffers performance problems for intensive web automation tasks which require real time responses. Other systems use the approach of creating custom browsers specially designed for web automation. Those browsers can develop some improvements based in the peculiarities of the web automation tasks. In this paper, we present a novel optimization technique that allows the parallel execution of the JavaScript while the navigation component loads the web page. This technique is based in the analysis of the interactions between the scripts during the first loading of the web page, generating some useful information that will be saved and used in the next executions. The tests executed with real web sources show that the scripts contained in the HTML documents can be evaluated concurrently and the navigation component loads the web pages faster when the scripts are executed in parallel

    A Custom Browser Architecture to Execute Web Navigation Sequences

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    This version of the article has been accepted for publication, after peer review and is subject to Springer Nature’s AM terms of use, but is not the Version of Record and does not reflect post-acceptance improvements, or any corrections. The Version of Record is available online at: https://doi.org/10.1007/978-3-319-26187-4_11.[Abstract]: Web automation applications are widely used for different purposes such as B2B integration and automated testing of web applications. Most current systems build the automatic web navigation component by using the APIs of conventional browsers. This approach suffers performance problems for intensive web automation tasks which require real time responses and/or a high degree of parallelism. Other systems use the approach of creating custom browsers to avoid some of the tasks of conventional browsers, but they work like them, when building the internal representation of the web pages. In this paper, we present a complete architecture for a custom browser able to efficiently execute web navigation sequences. The proposed architecture supports some novel automatic optimization techniques that can be applied when loading and building the internal representation of the pages. The tests performed using real web sources show that the reference implementation of the proposed architecture runs significantly faster than other navigation components

    A Workflow-Based Approach for Creating Complex Web Wrappers

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    This version of the article has been accepted for publication, after peer review and is subject to Springer Nature’s AM terms of use, but is not the Version of Record and does not reflect post-acceptance improvements, or any corrections. The Version of Record is available online at: https://doi.org/10.1007/978-3-540-85481-4_30.[Abstract]: In order to let software programs access and use the information and services provided by web sources, wrapper programs must be built to provide a “machine-readable” view over them. Although research literature on web wrappers is vast, the problem of how to specify the internal logic of complex wrappers in a graphical and simple way remains mainly ignored. In this paper, we propose a new language for addressing this task. Our approach leverages on the existing work on intelligent web data extraction and automatic web navigation as building blocks, and uses a workflow-based approach to specify the wrapper control logic. The features included in the language have been decided from the results of a study of a wide range of real web automation applications from different business areas. In this paper, we also present the most salient results of the study.This research was partially supported by the Spanish Ministry of Education and Science under project TSI2005-07730. Alberto Pan’s work was partially supported by the “Ramón y Cajal” programme of the Spanish Ministry of Education and Scienc

    Solution and Asymptotic Behavior for a Nonlocal Coupled System of Reaction-Diffusion

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    This paper concerns with existence, uniqueness and asymptotic behavior of the solutions for a nonlocal coupled system of reaction-diffusion. We prove the existence and uniqueness of weak solutions by the Faedo-Galerkin method and exponential decay of solutions by the classic energy method. We improve the results obtained by Chipot-Lovato and Menezes for coupled systems. A numerical scheme is presented

    O modelo de colaboração 3C no ambiente AulaNet

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    O trabalho intelectualizado cada vez mais exigido na sociedade conectada demanda novas habilidades dos trabalhadores, que devem estar aptos a aprender continuamente e a trabalhar em grupo. Tendo em vista estas necessidades, o ambiente de aprendizagem AulaNet valoriza uma abordagem colaborativa. Neste artigo È apresentado o modelo de colaboraÁ„ o 3C que norteou e foi refinado a partir do desenvolvimento do AulaNet. Seus trÍs principais conceitos ñ comunicaÁ„o, coordenaÁ„o e cooperaÁ„o ñ s„o explorados a partir dos serviÁos disponÌveis no ambiente e exemplificados pela din‚mica de um curso on-line

    Incapacidades fĂ­sicas em pessoas que concluĂ­ram a poliquimioterapia para hansenĂ­ase em VitĂłria da Conquista, Bahia, Brasil

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    Objetivo: Estimar a prevalĂȘncia de incapacidades fĂ­sicas e fatores associados, em pessoas que concluĂ­ram a poliquimioterapia (PQT) para hansenĂ­ase. MĂ©todos: Realizou-se estudo transversal (n=222) no municĂ­pio de VitĂłria da Conquista-Bahia-Brasil, incluindo casos de hansenĂ­ase notificados de 2001-2014. As incapacidades fĂ­sicas foram avaliadas por meio de aplicação de instrumento e avaliação do grau de incapacidade (GI) e do escore olho-mĂŁo-pĂ© (OMP). Resultados: A prevalĂȘncia de incapacidades fĂ­sicas foi de 64,8% (n=144), e de GI 2 foi de 17,1% (n=38). As incapacidades fĂ­sicas associaram-se de forma significante com analfabetismo (RP = 1,27; IC 95% = 1,05–1,54), classificação operacional multibacilar (RP = 1,26; IC 95% = 1,01–1,57), ocorrĂȘncia de episĂłdios reacionais (RP =1,41; IC 95% = 1,14–1,74) e dor/espessamento neural (RP = 1,3; IC 95% = 1,02–1,64). Houve piora do GI em 34 (32,1%) dos casos, considerando o momento do diagnĂłstico Ă  alta. ConclusĂ”es: As incapacidades fĂ­sicas, inclusive as com deformidades, constituem um importante problema no contexto individual e coletivo dos casos que seguem no pĂłs-alta da PQT. Ressalta-se a necessitando de maior monitoramento e cuidado longitudinal, no sentido de prevenir sequelas especĂ­ficas da doença.Objective: To estimate the prevalence of physical disabilities and associated factors in people who completed multidrug therapy (MDT) for leprosy. Methods: A cross-sectional study (n = 222) was conducted in VitĂłria da Conquista-Bahia-Brazil, including cases of leprosy reported from 2001-2014. Physical disabilities were assessed by means of instrument application and assessment of degree of disability (GI) and eye-hand-foot score (OMP). Results: The prevalence of physical disabilities was 64.8% (n = 144), and GI 2 was 17.1% (n = 38). Physical disabilities were significantly associated with illiteracy (PR = 1.27; 95% CI = 1.05–1.54), multibacillary operating classification (PR = 1.26; 95% CI = 1.01–1.57), occurrence of reaction episodes (PR = 1.41; 95% CI = 1.14–1.74) and neural pain/thickening (PR = 1.3; 95% CI = 1.02–1.64). GI worsened in 34 (32.1%) cases, considering the time of diagnosis at discharge. Conclusions: Physical disabilities, including those with deformities, constitute an important problem in the individual and collective context of cases following post-discharge of MDT. It is highlighted the need for greater monitoring and longitudinal care, in order to prevent specific sequelae of the disease
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