1,721,159 research outputs found
Peak Separation by Derivative Spectroscopy Applied to FTIR Analysis of Hydrolized Silica
Full text linkReliable spectral analysis is only achieved if the spectrum is thoroughly investigated in regard to all hidden and overlapped peaks. This paper describes the steps undertaken to find and separate such peaks in the range of 3000 to 4000 cm(-1) in the case of three different infrared absorption spectra of the glass surface of hydrolyzed silica optical fibers. Peak finding was done by the analysis of the second and fourth derivatives of the digital data, coupled with the available knowledge of infrared spectroscopy of silica-water interaction in the investigated range. Peak separation was accomplished by curve fitting with four different models. The model with the best fit was described by a sum of pure Gaussian peaks. Shoulder limit and detection limit maps were used to validate the revealed spectral features.Fundação CPqD, BR-13086902 Campinas, SP, BrazilUniv Estadual Paulista, Inst Quim, BR-14800900 Araraquara, SP, BrazilUniv Estadual Paulista, Inst Quim, BR-14800900 Araraquara, SP, Brazi
Inverse design of a broadband silicon nitride polarization rotor
No full textIn this work, we present the design for a broadband, compact and efficient silicon nitride polarization rotor. This work uses the inverse design method and the results show the polarization rotor with a footprint of 15x3 µm2Fundo para o Desenvolvimento Tecnológico das TelecomunicaçõesFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Optical Communications Solutions CPQD, SPCenter for Advanced and Sustainable Technologies State University of Sao Paulo (UNESP), São João da Boa Vista, SPCenter for Advanced and Sustainable Technologies State University of Sao Paulo (UNESP), São João da Boa Vista, SPFundo para o Desenvolvimento Tecnológico das Telecomunicações: 01.19.0088.00FAPESP: 2015/24517-8CNPq: 311035/2018-3CNPq: 432303/2018-
Proposta de abordagem para o desenvolvimento de listas de verificação de usabilidade sistemáticas e produtivas
Full text linkDissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico. Programa de Pós-Graduação em Ciência da Computação.Esta dissertação propõe uma abordagem para o desenvolvimento de uma técnica de avaliação da usabilidade de software interativo baseada em listas de verificação. São propostos ciclos de planejamento, construção, aplicação e análise dos resultados obtidos pelas aplicações de versões evolutivas dessas listas, processo este que é direcionado na busca de três métricas de qualidade: produtividade, efetividade e sistematização dos diagnósticos. Um estudo de caso confronta o emprego desta abordagem, com os quesitos para a ergonomia de software da norma ISO 9241. Este estudo realizou a avaliação da usabilidade do módulo de Operação do CPqD - Rede Externa, um sistema de gerenciamento de rede externa de telecomunicações, produzido pelo CPqD. Os quesitos selecionados geraram a primeira versão das listas de verificação, as quais evoluíram através de três ciclos de desenvolvimento até atingirem as suas versões finais
All-fiber Coaxial Mach-Zehnder Digital Sensor
No full textWe proposed a novel digital optical sensor designed from a tapered depressed-cladding fiber. The dynamic range is estimated 20 dB as its linear response for stresses up to 8 % of the elastic limit of the material.Centro de Tecnologia da Informação Renato Archer (CTI)São Paulo State University (UNESP) Campus of São João da Boa VistaResearch and Development Center in Telecommunications (CPqD)São Paulo State University (UNESP) Campus of São João da Boa Vist
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
Design of silicon Mach-Zehnder modulators employing deep neural networks
No full textWe present an efficient o ptimization m ethod f or t he d esign o f silicon-on-insulator integrated Mach-Zehnder modulators based on a deep neural network that is capable of predicting the main figures of merit from the modulator design variables.Fundo para o Desenvolvimento Tecnológico das TelecomunicaçõesFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)CPQD - Optical Communication Solutions, SPState University of São Paulo (UNESP), Campus of São João da Boa Vista, SPState University of São Paulo (UNESP), Campus of São João da Boa Vista, SPFundo para o Desenvolvimento Tecnológico das Telecomunicações: 01.19.0088.00FAPESP: 2015/24517-8CNPq: 311035/2018-3CNPq: 315391/2018-9CNPq: 432303/2018-
Definition of Platforms, Infrastructure and Governance: Report of Activity 3.1
No full textThis document presents blockchain platforms that can be supported by the Iliad project, as well as technical requirements for information technology infrastructure to instantiate blockchain nodes, as well as the design of the first distributed environment between RNP and CPqD with a functional blockchain network. This report is one of the important components to ensure the blockchain infrastructure that will support research in blockchain applications to be developed by universities, research institutions and startups. The survey of blockchain networks that are working, as well as the survey of platforms that can be supported by the project and their respective configurations are important steps to ensure that the Iliad project meets the needs of stakeholders, with the aim of ensuring that decentralized applications are executed on the blockchain networks created throughout goal 3 of Iliad.Este documento apresenta plataformas blockchain que podem ser suportadas no projeto Ilíada, bem como requisitos técnicos de infraestrutura de tecnologia da informação para instanciar nós blockchain, assim como o projeto do primeiro ambiente distribuído entre RNP e CPqD com uma rede blockchain funcional. Este relatório é um dos componentes importantes para garantir a infraestrutura blockchain que suportará as pesquisas em aplicações blockchain a serem desenvolvidas por universidades, instituições de pesquisa e startups. O levantamento de redes blockchain que estão funcionando, bem como o levantamento de plataformas que podem ser suportadas no projeto e suas respectivas configurações são etapas importantes para garantir que o projeto Ilíada atende as necessidades dos interessados, com intuito de garantir que aplicações descentralizadas sejam executadas nas redes blockchain criadas ao longo da meta 3 do Ilíada
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
Enhancing the Performance of Optical Networks with Route Segmentation and Fiber Augmentation
No full textIn this paper, we propose and evaluate a scheme to enhance the performance of optical networks using route segmentation (RS) limited to modulation format maximum range. We have performed this study with an incremental traffic model considering the densely-connected CORONET topology taking the C-band and C+L-bands, with and without the adoption of fiber augmentation (FA). The results show that this strategy can be an interesting way to improve the network performance regarding blocking and bit rates.Universidade Federal Do ABC UFABC, SPPUC-Campinas, SPFundação CPqD, SPUniversidade Estadual Paulista UNESP, SPUniversidade Estadual Paulista UNESP, S
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