Nilson Costa Roberty

Instituição:

Universidade Federal do Rio de Janeiro

Centro:

Centro de Tecnologia

Unidade:

Coordenação dos Programas de Pós-Graduação de Engenharia

Departamento:

Programa de Engenharia Nuclear/COPPE

ORCID:

não disponível no Lattes


Formação:

  • Instituto Superior Técnico-Departamento de Matematica

    | Pós-Doutorado | 2006 - Agora

  • Imperial College For Science Technology And Medicine

    | Pós-Doutorado | 1994 - 1996

  • Universidade Federal do Rio de Janeiro

    Engenharia Nuclear | Doutorado | 1979 - 1985

  • Universidade Federal do Rio de Janeiro

    Engenharia Nuclear | Mestrado | 1974 - 1976

  • Universidade Federal do Espírito Santo

    Estruturas | Graduação | 1969 - 1973
Laboratórios:
Nenhum laboratório cadastrado
Nuvens de Palavras:
Artigos:

(48.48% artigos com DOI)

Titulo DOI Ano
SIR Model Parameters Estimation with COVID-19 Data 10.9734/jamcs/2021/v36i330349 2021
On the Identification of Coefficient and Source Parameters in Elliptic Systems Modelled with Many Boundary Values Problems 10.9734/JAMCS/2020/v35i930324 2020
Sobre a não-unicidade de soluções para um problema de reconstrução de fontes características para equação de difusão-advecção 10.21167/cqdvol14ermac201923169664dmsmlsrncr8494 2019
On Inverse Problems for Characteristic Sources in Helmholtz Equations 10.1155/2017/2472060 2017
Identification and reconstruction of elastic body forces 10.1088/0266-5611/30/5/055015 2014
Simultaneous Reconstruction of Coefficients and Source Parameters in Elliptic Systems Modelled with Many Boundary Value Problems 10.1155/2013/631950 2013
Integral and Variational Formulations for the Helmholtz Equation Inverse Source Problem 10.1155/2012/808913 2012
X Ray Cone-beam Transform for Algebraic Reconstruction of a Stratified Flow Inside a Duct 2012
Consistent Algorithms Marching Along Characteristics for the Numerical Solution of the Boltzmann Equation 10.1155/2011/126309 2011
An inverse source problem for the stationary diffusion?advection?decay equation 10.1080/17415977.2011.609466 2011
Moving Heat Source Reconstruction from Cauchy Boundary Data: The Cartesian Coordinates Case 10.1155/2011/130834 2011
Identificação de Fontes para a Equação Unidimensional de Difusão-Advecção-Decaimento 10.5540/tema.2011.012.02.0101 2011
An explicit formulation for the inverse transport problem using only external detectors: Part II: Application to one-dimensional homogeneous and heterogeneous participating media 2010
An explicit formulation for the inverse transport problem using only external detectors: Part I: computational modelling 2010
Moving Heat Source Reconstruction from the Cauchy Boundary Data 10.1155/2010/987545 2010
On the identification of star-shape sources from boundary measurements using a reciprocity functional 10.1080/17415970802082799 2009
Full identification of acoustic sources with multiple frequencies and boundary measurements 10.3934/ipi.2009.3.275 2009
A time-marching MFS scheme for heat conduction problems 10.1016/j.enganabound.2007.10.012 2008
Recovering the source term in a linear diffusion problem by the method of fundamental solutions 10.1080/17415970802083243 2008
Inverse explicit and implicit formulation with applications in engineering, biophysics and biotechnology 2007
Stability estimates for an inverse problem for the linear Boltzmann equation 2006
The Evaluation of a Genera Regularization Term in Tikhonov's Functional for the Restoration of Biological Atomic Force Microscopy Imagesl 2006
A Family of Reconstruction Algorithms with Applications in Computerized Tomography 2006
Reconstruction of a Combination of the Absorption and Scattering Coefficients with a Discrete Ordinates Method Consistent with The Source Detector System 2004
A One Dimensional Inverse Radiative Transfer Problem with Time-Varying Boundary Conditions 2004
Inverse Radiative Transfer Problems in Two Dimensional Participating Media 2004
The Atomic Force Microscopy as Tool for Biomedical and Biotechnological Studies 2003
The Restoration of AFM Biological Images Using the TiKhonov's Regularization Method - The Proposl of a General Regularization Functional for Best Contrast Results 2001
Absorption Coefficient Estimation In Heterogeneous Media Using A Domain Partition Consistent With Divergent Beams 2001
A source detetor methodology for the construction and solution of the one dimensional inverse transport equation 2001
A Generalized Approach for Atomic Force Microscopy Image Restoration with Bregman Distances as Tikhonov Regularization Terms 2000
Maximum Entropy Algoritims For Image Reconstruction From Projections 1992
Analytical Approximate Solutions of the Basic Equations in Classical Physics 1980
Eventos:

(0.00% eventos com DOI)

Titulo DOI Ano
ON THE UNIQUENESS AND CONDITIONAL STABILITY IN SOURCE RECONSTRUCTION FOR MODIFIED HELMHOLTZ EQUATIONS 2016
Reconstruction of PDE Coefficients with Overprescription of Cauchy Data at the Boundary 2016
Reconstruc􀆟on and iden􀆟fica􀆟on of characteris􀆟c sources in Helmholtz equa􀆟on 2016
RECONSTRUCTION OF COEFFICIENTS AND SOURCES PARAMETERS WITH LIPSCHITZ DISSECTION OF CAUCHY DATA AT BOUNDARY 2015
Reconstruction of coefficients and sources in elliptic systems 2015
Reconstruction of a Characteristic Source in a Diffusive-Advective Model 2014
Coefficient parameter determination for the stationary anisotropic one-velocity Boltzmann transport equation 2014
Analytical Observability of Symmetric Star Shaped Sources for Modified Helmholtz Model 2014
Alguns Aspectos da Teoria do potencial em Problemas Inversos de Reconstrução de Fontes 2012
Coefficient Determination for The Stationary Anisotropic Boltzmann Transport Equation 2012
Moving Heat Source Reconstruction in a Cartesian Coordinate Domain 2012
Parameters Reconstruction in Second Order Elliptic Problems 2012
Parameters Reconstruction in Second Oreder Partial Differential Equations 2012
Stationary and Transient Source Reconstruction in Cartesian Geometry 2012
Um Algorithmo Para Recuperar Uma Fonte Difusiva Advectiva a Partir de Informações no Bordo de Um Domínio Bidimensional 2012
Uncertainties on the inverse source problem for elliptic boundary values problems 2012
Characterisitc Algorithms for the Solution of The Boltzmann Equation 2011
Comparison Between Tikhonov, SVD and Landwebwer Regularization procedures applied to Inverse problems 2011
Computational Method for Verification of Different Materials in Stratified Multiphase Flow within a Duct Using X-Ray Transform 2011
Reconstruction of a Stratified Flow Inside a Duct Using X-Ray Transform for Constant by parts Functions 2011
Reconstruction of Materials Inside a Duct Using X-Ray Transform 2011
Source Reconstruction from Boundary Data 2011
Star Shape Moving Source Reconstruction From Boundary Data 2011
Strong and Weak Formulations for the Helmholtz Equation 2011
The Stationary Diffusion Advection Decay Inverse Source Problem 2011
Star shape transient source reconstruction from boundary data 2010
An inverse source problem for the stationary diffusion-advection-decay equation 2010
Star shape sources reconstruction in the modified helmholtz equation Dirichlet problem 2010
Using X-ray transform for constant by parts functions reconstruction 2010
Source Reconstruction from boundary data: The thermal wave model 2010
Flow regime identification methodology with computerized tomography 2010
Identificação de Fontes para a Equação Unidimensional de Difusão-Advecção-Decaimento 2010
Transient heat source reconstruction from consistent Cauchy data 2010
A uniqueness theorem for the modified Helmholtz inverse source problem 2009
Star shape transient heat source reconstruction from boundary data 2009
Strong, varationalquares formulation for the Helmholtz equation inverse source problem 2009
Uniqueness theorem for the modified Helmholtz inverse sourceproblem 2009
A natural basis for the Boltzmann particles transport equation 2008
Discontinuities localization using radon transform 2008
Source reconstruction for thr Helmholtz equation 2008
On the identification of star shape sources from boundary measurements using a reciprocity functional 2007
Solving an inverse source problem with the MFS and higher order direct problems 2007
On the uniqueness of Helmholtz equation star shape sources reconstruction from boundary data 2007
Star-shape source recosntruction in the Helmholtz equations-frequency parameter limit 2007
Star shape source reconstruction in the Helmholtz equation-frequency parameter limit 2007
A hybrid FDM-MFS method for the numerical solution of heat conduction problems 2007
A nodal maximum entropy method for the pin to pin reconstruction of neutron flux distribution in a fuel assembly 2007
On the use of MFS in Linear Inverse Diffusion Problems 2006
A Matrix Based Explicit Formulation for Inverse Radiative Transfer Problem 2005
On the Use of Bregman Distance for The Solution of Inverse Radiative Transfer Problem in One Dimensional Participating Media 2005
Remarks on Coefficient Determination for the Stationary Anisotropic Transport Equation 2005
Effects of the Angular Domain Discretization on the Explicit Formulation Developed for the Solution of Inverse Radiative Transfer Problems 2005
A Natural Basis for Numerical Solution of The Linear Boltzmann Particles Transport Equation 2005
Um Moddelo Axisimétrico para a Equação de Transferência Radiativa Bidimensional 2005
A Compact Formulation for the Self-adjoint Boltzmann Transport Problem 2004
A Self-adjoint Formulation for the Inverse Transport Problem 2004
Os B e q ótimos no Método de Máxima Entropia Generalizada para um Problema Ambiental 2004
Stationary inverse transport problem:Symmetrized first order problem and the equivalent self-adjoint formulation 2004
Development of a Family of Regularization Terms for the Solution of Inverse Radiative Transfer Problems 2004
Uma Comparação do Algoritimo de Máxima Entropia e uma Familia de Algoritimos q-ART para Estimativa do Coeficiente de absorção 2004
Análise de Sencibilidade para o Problema Inverso de Transferência Radiativa 2004
Solução do Problema Inverso de Transferência Radiativa com Momentos da q-Discrepância 2004
Estimation of Participating Media Radiative Transfer Properties with Time Depending External Illumination 2003
A Discrete Ordinates Multi-Step Strategy For Inverse Radiative Transfer Problems in Two-Dimensional Participating Media 2003
A Metodologia Fonte-Detector para um Problema Inverso de Transferência Radiativa Unidimensional com Condições de Contorno Dependente do Tempo 2003
Absorption and Scattering Coefficient Estimation:Solved with a q-ART Algoritm 2003
Absorption and Scattering Coefficient Estimastion in Two-Dimensional Participating Medium Using The Maximum Entropy Method 2003
Solution of the Transport Equation in Heterogeneous Participating Media Using the Discrete Ordinates Method-Direct and Inverse problem 2003
On the Identification of Parameters for the Neutron Transport Equation via Boundary Measurements 2003
On the Identification of Parameters for the Neutron Transport Equation via Boundary Measurements 2003
Estimates of Direct Emission of Ten Phas To Guanabara Bay 2003
A Few Algoritims Consistent With the Source Detector System for Solution of Inverse Radiative Transfer Problems 2002
A One-dimensional Inverse Radiative Transfer Problem With Time-dependent Boundary Conditions 2002
Avaliação do Funcional de Tikhonov Empregando uma Familia de Funções de Regularização a um Parametro para a Reestruturação de Imagens Biológicas-Proposta de um Métode de Realimentação 2002
Estimacion de los Coeficients de Absorcion en un Medio Bidimensional Participante desde el Unidimensional al Bidimensional 2002
Estimacion del Coeficiente de Absorcion y Dispersion en Medios Participantes Bidimensionales Utilizando el Método de Maxima Entropia Generalizada y el Método de Levenberg-Maquardt 2002
Estimação dos Coeficientes de Absorção e Espalhamento em um Meio Bidimensional 2002
Estudo do Transporte de Radiação em Meios Bidimensionais Usando Ordenadas Discretas e Elementos Finitos 2002
Evaluation of Parameters Used in a Multimedia Model -Application to Guanabara Bay 2002
Inverse Absorption and Scattering Coefficient Reconstruction Problem for the Stationary Boltzmann Equation 2002
Inverse Radiative Transfer Problems In Two Dimensional Participanting Media 2002
On the Influx to outflux mapping for the transport equation 2002
Radiative Properties Estimation in Participating Media with Time Dependent External Illumination 2002
Reconstruction of Absorption and Scattering Coefficients in Two Dimensional Heterogeneous Participating Media 2002
Solution of the Two-Dimensional Transport Eqution Using a Domain Partiton Consistent With a Discrete Ordinates Method 2002
Solução da Equação de Transporte Usando Uma Abordagem de Ordenadas Discretas Consistente com Feixes Paralelos de Radiação 2002
The Source-Detector Methodology for Applications With Anisotropic Scattering 2002
Um Modelo Dinamico em Meio Ambiente 2002
A Methodology for Image Reconstruction in Absorbing and Scattering Media Consistent with Parallel Beam Geometry 2001
A Comparison of the Ment Algorithms with a One Parameter Family of Algorithms for the Estimation of the Absorption Coefficient Using a Domain Partition Constructed with Divergent Beams 2001
Radiative Properties Estimation in Participanting Media Using Time Dependent External Sources 2001
A Inverse Radiative Transfer Problem in Two-dimensional Heterogeneous Participanting Media 2001
Estudo da Sencibilidade do Problema de Transporte de Radiação em Meio Espalhador 2001
Restauracão de imagens Biológicas com Regularizacão de Tikhonov 2000
Absortion Coefficient Estimation in Two-Dimensional Participating Media Using a Base Constructed With Divergent Beans 2000
Resolution Enhancement in Atomic Microscopy Biological Image Restoration by Means of a General One Parameter Functionals as Tikhonov's Regularization Term 2000
Restauracão de Imagens Biológicas Obtidas com Microscópio de Forca Atômica através do Método de Regularizacão de Tikhonov.Uma Abordagem de problemas Inversos. 2000
A Family of Reconstruction Algorithms with Applications in Computerized Thomography 2000
Uso da Técnica Fonte-Detector em Tomografia com Espalhamento Anisotropico 2000
The Evaluation of a Regularization Term in Tikhonov's Functional 2000
Evaluation and Application of a General Regularization Functional in Image Reconstruction 2000
Um problema inverso em transferência Radiativa com codições de contorno dependente do tempo 2000
Estimativa do Coeficiente de Absorção com uma partição de dominio consistente com o sistema fonte-detetor 2000
Um Método de Ordenadas Discretas Consistente com o sistema Fonte Detetor para Transporte de Radiação com espalhamento anisotrópico 2000
Estimativa do Coeficiente de Absorção e do Coeficiente de Espalhamento Anisotrópico em um Meio Homogêneo 2000
The Proposal of a General Regularization Functional in the Scope of Tikhonov's Methodology for the Restoration of Biological Atomic Force Microscopy Images-Evaluation and Applications 2000
A Source Detector Metodology For The Construction And Solution Of The One-Dimensional Inverse Transport Equation 1999
A Generalized Approach For Atomic Force Microscopy Image Restoration With Bregman Distance As Tikhonov Regularization Terms 1999
Natural Base Construction For Absorption Coefficient Estimation In Heterogenous Media With Divergent Beans 1999
The Evaluation of a General Regularization Functional (q-dicrepancy ) for the Restorationof Biological Atomic Force Microscopy Images 1999
Sobre o Uso de Transformada de Laplace na Solucão de problemas Inversos em meios Participantes 1999
Proposta de um Funcional Geral de Regularizacão para a restauracão de Imagens Biológicas Obtidas com Microscópico de Forca Atômica 1999
A Study on Brittle Fracture in PWR Vessel Under Pressurized Thermal Shock with Asymetric Refrigeration 1999
Uso da Solucão de Problemas Inversos no Projeto e Desenvolvimento de Equipamentos para Engenharia Nuclear 1999
A Abordagem Fonte-Detetor Na Solucao de Problemas Inversos Em Meios Participantes 1998
A Modelagem da Tomografia de Espalhamento Como Um Problema Inverso 1998
Reconstrucao de Imagens Com Regularizacao de Tikhonov e Determinacao do Parametro Otimo de Regularizacao 1998
Deconvolucao de Dados Simulados Com A Regularizacao de Tikhonov 1998
Uma Comparacão do Método de Ordenadas Discretas co Outras Técnicsa para Solucão da Equacão de Transporte Unidimensional 1998
Geracão de Base Natural para Tomodrafia com Feixes Divergentes 1998
Transport Models For Tomography:Theoretical And Practical Considerations 1995
Maximum Entropy Reconstruction Of Spect Images 1994
O MART para Coeficientes Negativos 1993
Reconstrucão de imagens com Pixels Naturais 1990
Uso de Projecõespara Determinacao do Contorno de Objetos 1990
Metodo da Maxima Entropia Para Reconstrucao de Imagens. 1989
Computerized Tomography With Neutrons. 1989
Prevencão Contra Fratura Fragil em Vaso de Pressão de Reatores PWRem Presenca de Choque Termico Pressurizado 1984
Comparacão dos Resultados do Programa ABRE-3 com Outros Modelos e com Resultados Experimentais 1983
Distribuicão de temperatura em Varetas Combustiveis Cilindricas - Um Tratamento Variacional 1983
Estudo do Remolhamento de Elementos Combustiveis em Condicões Acidentais 1983
Estudo do Comportamento do Combustivel Nuclear 1983
Distribuicão de temperatura em Varetas Combustiveis 1983
Remolhamento do Elemento Combustivel de Ratores Nucleares - Um Tratamento Variacional 1982
Um Modelo Bidimensional com três Regiões para o estudo da Frente de Remolhamento 1982
Remolhamento do Elemento Combustivel de Reatores Nucleares - Um Tratamento Variacional 1982
Calculo das Tensões Termoelasticas na Região da Frente de Remolhamento do Revestimento da Vareta Combustivel Durante um Postulado LOCA 1982
Redistribuicão de Temperatura , Migracão de Porosidade e Formacão do Vazio Central em Varetas Combustiveis Cilndricas 1981
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