Search Results - "Celso Rômulo Barbosa Cabral"

mixsmsn : Fitting Finite Mixture of Scale Mixture of Skew-Normal Distributions by Prates, Marcos Oliveira, Cabral, Celso Rômulo Barbosa, Lachos, Víctor Hugo

“…We present the R package mixsmsn, which implements routines for maximum likeli- hood estimation (via an expectation maximization EM-type algorithm) in finite…”
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Multivariate mixture modeling using skew-normal independent distributions by Cabral, Celso Rômulo Barbosa, Lachos, Víctor Hugo, Prates, Marcos O.

“…In this paper we consider a flexible class of models, with elements that are finite mixtures of multivariate skew-normal independent distributions. A general…”
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Finite mixture of regression models for censored data based on scale mixtures of normal distributions by Zeller, Camila Borelli, Cabral, Celso Rômulo Barbosa, Lachos, Víctor Hugo, Benites, Luis

“…In statistical analysis, particularly in econometrics, the finite mixture of regression models based on the normality assumption is routinely used to analyze…”
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Robust mixture modeling based on scale mixtures of skew-normal distributions by Basso, Rodrigo M., Lachos, Víctor H., Cabral, Celso Rômulo Barbosa, Ghosh, Pulak

“…A flexible class of probability distributions, convenient for modeling data with skewness behavior, discrepant observations and population heterogeneity is…”
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A dynamic linear model with extended skew-normal for the initial distribution of the state parameter by Cabral, Celso Rômulo Barbosa, da-Silva, Cibele Queiroz, Migon, Helio S.

“…We develop a Bayesian dynamic model for modeling and forecasting multivariate time series relaxing the assumption of normality for the initial distribution of…”
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Bayesian density estimation using skew student-t-normal mixtures by Cabral, Celso Rômulo Barbosa, Bolfarine, Heleno, Pereira, José Raimundo Gomes

“…We present a Bayesian approach for modeling heterogeneous data and estimate multimodal densities using mixtures of Skew Student-t-Normal distributions [Gómez,…”
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Bayesian measurement error models using finite mixtures of scale mixtures of skew-normal distributions by Barbosa Cabral, Celso Rômulo, de Souza, Nelson Lima, Leão, Jeremias

“…We present a proposal to deal with the non-normality issue in the context of regression models with measurement errors when both the response and the…”
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Finite mixture modeling of censored data using the multivariate Student-t distribution by Lachos, Víctor H., Moreno, Edgar J. López, Chen, Kun, Cabral, Celso Rômulo Barbosa

“…Finite mixture models have been widely used for the modeling and analysis of data from a heterogeneous population. Moreover, data of this kind can be subject…”
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Multivariate measurement error models using finite mixtures of skew-Student t distributions by Cabral, Celso Rômulo Barbosa, Lachos, Víctor Hugo, Zeller, Camila Borelli

“…In regression models, the classical assumption of normal distribution of the random observational errors is often violated, masking some important features of…”
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Influence diagnostics for Student-t censored linear regression models by Massuia, Monique B., Cabral, Celso Rômulo Barbosa, Matos, Larissa A., Lachos, Víctor H.

“…In this paper, we extend the censored linear regression model with normal errors to Student-t errors. A simple EM-type algorithm for iteratively computing…”
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High-Resolution Anoscopy in the Diagnosis of Anal Cancer Precursor Lesions in Renal Graft Recipients by Tramujas da Costa e Silva, Ivan, de Lima Ferreira, Luiz Carlos, Santos Gimenez, Felicidad, Gonçalves Guimarães, Ricardo Alexandre, Botinelly Fujimoto, Luciana, Barbosa Cabral, Celso Rômulo, Venturim Mozzer, Renzo, de Souza Atala, Larissa

“…Background Renal graft recipients are one of the population groups known to be at high risk of developing anal cancer. This study investigated the presence of…”
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Anal cancer precursor lesions in HIV-positive and HIV-negative patients seen at a tertiary health institution in Brazil by Silva, Ivan Tramujas da Costa e, Araújo, José de Ribamar, Andrade, Rosilene Viana de, Cabral, Celso Rômulo Barbosa, Gimenez, Felicidad Santos, Guimarães, Adriana Gonçalves Daumas Pinheiro, Martins, Ticiane Costa, Lopes, Lucília Rocha, Ferreira, Luiz Carlos de Lima

“…To investigate the prevalence of anal squamous intraepithelial lesions (ASIL) or anal cancer in patients attended at the Tropical Medicine Foundation of…”
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Growth Velocity and Nutritional Status in Children Exposed to Zika Virus during Pregnancy from Amazonas Cohort, Brazil by Peixoto, Lucíola de Fátima Albuquerque de Almeida, Abtibol-Bernardino, Marília Rosa, Guerra, Cecilia Victoria Caraballo, de Oliveira, Geruza Alfaia, Chaves, Beatriz Caroline Soares, de Souza Rodrigues, Cristina, de Andrade, Anny Beatriz Costa Antony, de Fátima Redivo, Elijane, Fernandes, Salete Sara Alvarez, Otani, Rodrigo Haruo, da Silva Neto, Alexandre Vilhena, da Silva Balieiro, Antônio Alcirley, Cabral, Celso Rômulo Barbosa, Baia-da-Silva, Djane, Castilho, Márcia da Costa, Bôtto-Menezes, Camila Helena, Alecrim, Maria das Graças Costa, Leal, Maria do Carmo, Benzecry, Silvana Gomes, Martinez-Espinosa, Flor Ernestina

“…The high incidence of Zika virus (ZIKV) infection in the period of 2015-2016 in Brazil may have affected linear height growth velocity (GV) in children exposed…”
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Needlescopic versus laparoscopic cholecystectomy. A prospective study of 60 patients by Cabral, Pedro Henrique Oliveira, Silva, Ivan Tramujas da Costa e, Melo, Janaína Vieira, Gimenez, Felicidad Santos, Cabral, Celso Rômulo Barbosa, Lima, Ana Paula Calheiros de

“…To test the hypothesis that needlescopic cholecystectomies (NC) offer superior outcomes in comparison to common laparoscopic cholecystectomies (LC). Sixty…”
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Bayesian analysis of skew-normal independent linear mixed models with heterogeneity in the random-effects population by Rômulo Barbosa Cabral, Celso, Hugo Lachos, Víctor, Regina Madruga, Maria

“…We present a new class of models to fit longitudinal data, obtained with a suitable modification of the classical linear mixed-effects model. For each sample…”
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Multivariate measurement error models using finite mixtures of skew-Student distributions by Cabral, Celso Rômulo Barbosa, Lachos, Víctor Hugo, Zeller, Camila Borelli

“…In regression models, the classical assumption of normal distribution of the random observational errors is often violated, masking some important features of…”
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Robust mixture modeling based on scale mixtures of skew-normal distributions : Variable selection and robust procedures by BASSO, Rodrigo M, LACHOS, Victor H, BARBOSA CABRAL, Celso Rômulo, GHOSH, Pulak

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Anal cancer precursor lesions in HIV-positive and HIV-negative patients seen at a tertiary health institution in Brazil Lesões precursoras do câncer anal em pacientes HIV-positivos e HIV-negativos atendidos numa instituição de saúde terciária no Brasil by Ivan Tramujas da Costa e Silva, José de Ribamar Araújo, Rosilene Viana de Andrade, Celso Rômulo Barbosa Cabral, Felicidad Santos Gimenez, Adriana Gonçalves Daumas Pinheiro Guimarães, Ticiane Costa Martins, Lucília Rocha Lopes, Luiz Carlos de Lima Ferreira

“…Purpose: To investigate the prevalence of anal squamous intraepithelial lesions (ASIL) or anal cancer in patients attended at the Tropical Medicine Foundation…”
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Needlescopic versus laparoscopic cholecystectomy: a prospective study of 60 patients Colecistectomia agulhascópica versus colecistectomia laparoscópica: um estudo prospectivo de 60 pacientes by Pedro Henrique Oliveira Cabral, Ivan Tramujas da Costa e Silva, Janaína Vieira Melo, Felicidad Santos Gimenez, Celso Rômulo Barbosa Cabral, Ana Paula Calheiros de Lima

“…PURPOSE: To test the hypothesis that needlescopic cholecystectomies (NC) offer superior outcomes in comparison to common laparoscopic cholecystectomies (LC)…”
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Citologia anal como método de rastreamento para a detecção precoce do câncer anal: esfregaços com algodão hidrófilo são mesmo insatisfatórios? Anal cytology as a screening method for early detection of anal cancer: are hydrophilic cotton smears really unsatisfactory? by Ivan Tramujas da Costa e Silva, Felicidad Santos Gimenez, Ricardo Alexandre Gonçalves Guimarães, Romildo Torres Camelo, Manoel Nilzomar Damasceno Melo, Flávio Silveira de Barros, Adriana Daumas, Celso Rômulo Barbosa Cabral, Erica Liberato Guimarães

“…OBJETIVO: Testar se swabs de algodão hidrófilo são capazes de produzir esfregaços de secreção anal que permitam leituras citológicas satisfatórias ao Pap-a em…”
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