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1,218 results on '"Rocha, Francisco"'

1. Phenotypic and Molecular Characterization of Extended-Spectrum β-Lactamase, Plasmid-Mediated- AmpC, and Carbapenemase-Producing Enterobacteriaceae Isolated from Companion and Production Animals in Brazil: Phenotypic and Molecular Characterization of Extended-Spectrum β-Lactamase

Author

Chicoski, Larissa M., da Costa, Arthur R., Menck-Costa, Maísa F., Rocha, Francisco E. Pereira, Mainardi, Raffaella M., Agnol, Alais M. Dall, and Pereira, Ulisses P.

Published
2025
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2. Streptococcus mutans serotyping, collagen-binding genes and Candida albicans in dentin carious lesions: a molecular approach

Author

Regis, Wanessa Fernandes Matias, Mustafa Gomes Muniz, Francisco Wilker, Rocha, Francisco Ruliglésio, de Araújo Sales, Ernanda Maria, Guedes Peixoto Vieira, Pedro Henrique Acioly, Barros, Myrna Maria Arcanjo Frota, de Almeida Alves, Stephanie, Brilhante, Raimunda Sâmia Nogueira, Duarte, Simone, Neves, Beatriz Gonçalves, and Rodrigues, Lidiany Karla Azevedo

Published
2025
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3. Segmented zero-inflated Poisson mixed effects model with random changepoint

Author

Dourado, Paulo, Pedroso-de-Lima, Antonio C., and Rocha, Francisco M. M.

Subjects
Statistics - Applications
Abstract

The COVID-19 pandemic has had a substantial impact on hospital services, as many institutions have observed a surge in healthcare-associated infections (HAIs) despite heightened adherence to isolation protocols and hand hygiene. According to the World Health Organization (WHO), HAIs are among the leading causes of mortality and morbidity of hospitalized patients. This study aims to examine the effect of the COVID-19 pandemic on the incidence of central venous catheter-related bloodstream infections (CR-BSIs) of hospitals in the city of S\~ao Paulo. Initially we considered segmented zero-inflated Poisson (ZIP) mixed-effects models with known changepoint, which can be estimated applying the standard framework of ZIP mixed-effects models. However, we found that the changepoint could occur at varying times across different hospitals. We present an effective iterative procedure to estimate segmented ZIP mixed-effects models with random changepoints in a likelihood-based framework. The suggested procedure is a practical approach employing conventional computational tools for estimating standard mixed-effects zero-inflated Poisson (ZIP) models. Prior to its implementation to the CR-BSI data, simulation studies were conducted to examine the accuracy of the estimation under various scenarios.

Published
2023

9. Controlling fluid adhesion force with electric fields

Author

Anjos, Pedro H. A., Rocha, Francisco M., and Dias, Eduardo O.

Subjects
Physics - Fluid Dynamics, Condensed Matter - Soft Condensed Matter
Abstract

Developing adhesives whose bond strength can be externally manipulated is a topic of considerable interest for practical and scientific purposes. In this work, we propose a method of controlling the adhesion force of a regular fluid, such as water and/or glycerol, confined between two parallel plates by applying an external electric field. Our results show the possibility of enhancing or diminishing the bond strength of the liquid sample by appropriately tuning the intensity and direction of the electric current generated by the applied electric field. Furthermore, we verify that, for a given direction of the electric current, the adhesion force can be reduced enough for the fluid to lose its adhesive properties and begin exerting a force to move apart the confining plates. In these circumstances, we obtain an analytical expression for the minimum electric current required to detach the plates without requiring the action of an external force., Comment: 9 pages, 5 figures

Published
2022
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11. FATORES RELACIONADOS À INFECÇÃO DE TRATO URINÁRIO NA GESTAÇÃO

Author

Pereira, Ana Maria de Oliveira, primary, Macário, Verilene Fernandes, additional, Braga, Ana Júlia Menezes, additional, Silva, José Gerardo da, additional, Sousa, Pedro Davi Lima de, additional, Nascimento, Wágnar Silva Morais, additional, Vassallo, Kaline Ribeiro de Almeida, additional, Ananias, Dayana Vieira, additional, Oliveira Neto, Joaquim Guerra de, additional, Farias, Maria Divina dos Santos Borges, additional, Rocha, Francisco Vinicius Teles, additional, and Silva, Avelar Alves da, additional

Published
2024
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12. Diversity of self-propulsion speeds reduces motility-induced clustering in confined active matter

Author

de Castro, Pablo, Rocha, Francisco M., Diles, Saulo, Soto, Rodrigo, and Sollich, Peter

Subjects
Condensed Matter - Soft Condensed Matter, Physics - Biological Physics
Abstract

Self-propelled swimmers such as bacteria agglomerate into clusters as a result of their persistent motion. In 1D, those clusters do not coalesce macroscopically and the stationary cluster size distribution (CSD) takes an exponential form. We develop a minimal lattice model for active particles in narrow channels to study how clustering is affected by the interplay between self-propulsion speed diversity and confinement. A mixture of run-and-tumble particles with a distribution of self-propulsion speeds is simulated in 1D. Particles can swap positions at rates proportional to their relative self-propulsion speed. Without swapping, we find that the average cluster size $L_\text{c}$ decreases with diversity and follows a non-arithmetic power mean of the single-component $L_\text{c}$'s, unlike the case of tumbling-rate diversity previously studied. Effectively, the mixture is thus equivalent to a system of identical particles whose self-propulsion speed is the harmonic mean self-propulsion speed of the mixture. With swapping, particles escape more quickly from clusters. As a consequence, $L_\text{c}$ decreases with swapping rates and depends less strongly on diversity. We derive a dynamical equilibrium theory for the CSDs of binary and fully polydisperse systems. Similarly to the clustering behaviour of one-component models, our qualitative results for mixtures are expected to be universal across active matter. Using literature experimental values for the self-propulsion speed diversity of unicellular swimmers known as choanoflagellates, which naturally differentiate into slower and faster cells, we predict that the error in estimating their $L_\text{c}$ via one-component models which use the conventional arithmetic mean self-propulsion speed is around $30\%$., Comment: 11 pages, 6 figures

Published
2021

13. Logic-Based Explanations for Linear Support Vector Classifiers with Reject Option

Author

Rocha, Francisco Mateus, Rocha, Thiago Alves, Ribeiro, Reginaldo Pereira Fernandes, Rocha, Ajalmar Rêgo, Goos, Gerhard, Founding Editor, Hartmanis, Juris, Founding Editor, Bertino, Elisa, Editorial Board Member, Gao, Wen, Editorial Board Member, Steffen, Bernhard, Editorial Board Member, Yung, Moti, Editorial Board Member, Naldi, Murilo C., editor, and Bianchi, Reinaldo A. C., editor

Published
2023
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17. Identifying sustainability priorities among value chain actors in artisanal common octopus fisheries

Author

Ainsworth, Gillian B., Pita, Pablo, Pita, Cristina, Roumbedakis, Katina, Pierce, Graham J., Longo, Catherine, Verutes, Gregory, Fonseca, Tereza, Castelo, Daniela, Montero-Castaño, Carlos, Valeiras, Julio, Rocha, Francisco, García-de-la-Fuente, Laura, Acuña, Jose Luis, del Pino Fernández Rueda, M., Fabregat, Alberto Garazo, Martín-Aristín, Alberto, and Villasante, Sebastián

Published
2023
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21. Therapeutic potential of phytoconstituents from Pilocarpus microphyllus Stapf ex Wardlew. and propolis in Alzheimer's disease: an Integrative Review/Potencial terapeutico de fitoconstituintes de Pilocarpus microphyllus Stapf ex Wardlew. e da propolis na doenca de Alzheimer: uma Revisao Integrativa

Author

Queiroz do Nascimento, Jose Gustavo, Alves Coelho, Izadora, Chagas Sousa Rocha, Francisco das, Silva, Maria Francilene Souza, Tavares Silva, Jociane Sthefanny, and Leal de Miranda, Joao Antonio

Published
2024
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22. Self-channelisation and roll waves in dry granular flows

Author

Melo Da Rocha, Francisco, Gray, John, and Johnson, Christopher

Subjects
532, Particle-size segregation, Geophysical and geological flows, Roll waves, Rheology, Granular flows, Self-channelisation, Shallow water flows
Abstract

Dense granular flows are observed in a wide range of natural phenomena, such as debris flows, snow avalanches and dense pyroclastic flows, to small-scale chute flows that are used extensively in industry. Understanding the underlying physics of such systems is of great importance to avoid waste and essential for developing hazard mit- igation strategies. In this thesis, two processes are investigated: Self-channelisation in monodisperse flows and the effect of particle size segregation on the kinematics of granular roll waves. Firstly, we consider the problem of self-channelisation that occurs when a monodisperse granular material is supplied onto an inclined rough plane with a constant injection rate and, as the front propagates downstream, the edges of the flow spontaneously solidify to form static levees, confining a central flowing channel. A viscous depth-averaged avalanche model is used to show that two physical mecha- nisms are crucial to uniquely select the equilibrium state and quantitatively predict the self-channelisation process, namely frictional hysteresis and depth-averaged lateral viscous dissipation. Importantly, it is shown that the steady configuration is governed by a well-defined force balance, which implies that the width of leveed channels is not necessarily set by the granular front. Time-dependent simulations are performed to investigate the transient evolution towards the equilibrium state, as well as how the system transitions to an unsteady avalanching regime as the mass flux is reduced. We proceed by investigating a monodisperse granular flow over a rough conical surface. Small-scale experiments show that down the cone the granular material spreads, thins and slows down until the interface splits, generating a beautiful fingering pattern, in which each individual finger has the morphology of a self-channelised flow. Numerical solutions of the depth-averaged model are used to predict the position at which the interface breaks, as well as the number of fully developed fingers, demonstrating that granular fingering is possible in monodisperse flows due to the hysteretic nature of the particulate media. The second problem addressed in this thesis regards the formation of roll waves in bidisperse granular avalanches. This is investigated through experi- ments with two different-sized spherical beads confined between rigid glass sidewalls. Using a depth-averaged segregation model, we construct travelling-wave solutions for the bulk flow and show that different regimes are possible for the particle concen- tration profile. Time-dependent simulations qualitatively recover the experiments, showing that a concertina-like effect results in a higher concentration of larger and more friction particles at the wave crests. Both phenomena here studied can lead to a significant increase in the destructive potential of large-scale flows and, therefore, our results may be particularly relevant in the geophysical context.

Published
2020

23. Accelerating Smart City Simulations

Author

Rocha, Francisco Wallison, Fukuda, João Cocca, Francesquini, Emilio, Cordeiro, Daniel, Filipe, Joaquim, Editorial Board Member, Ghosh, Ashish, Editorial Board Member, Prates, Raquel Oliveira, Editorial Board Member, Zhou, Lizhu, Editorial Board Member, Gitler, Isidoro, editor, Barrios Hernández, Carlos Jaime, editor, and Meneses, Esteban, editor

Published
2022
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25. IMPORTÂNCIA DA ATENÇÃO À SAÚDE DA MULHER DURANTE A PANDEMIA COVID-19

Author

Meneses, Leymara de Oliveira, primary, Meneses, Francisco Ivo de Pinho, additional, Silva, Avelar Alves da, additional, Cardoso, Arquimedes Cavalcante, additional, Oliveira, Carla Patrícia de Carvalho, additional, Silva, Regina Célia da, additional, Terto, Wesley Douglas da Silva, additional, Calaça, Mickaelle Bezerra, additional, Rocha, Francisco Vinicius Teles, additional, Cavalcante Neto, Armando Soares, additional, and Luz, Renata Maria Soares Eloi, additional

Published
2023
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26. CONFIGURAÇÃO DA ANATOMIA INTERNA DE PRÉ-MOLARES POR MEIO DE DIAFANIZAÇÃO

Author

Oliveira, Lucas Sabino, primary, Lemos, Ana Georgina Leite Matos de, additional, Morais, Ellen Soares de, additional, Rocha, Francisco Vinicius Teles, additional, Peres, Francisco Emanuel Andrade, additional, Pereira Da Silva Costa Neta, Edith, additional, Palombit, Kelly, additional, Guerra, Sérgio Paulo Lima, additional, Cardoso, Arquimedes Cavalcante, additional, and Leite, Carla Maria de Carvalho, additional

Published
2023
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27. COMPREENDENDO SOBRE PÉ DIABÉTICO PARA INTERVENÇÕES PRECOCES

Author

Lassala, Janaina Nascimento, primary, Almeida, Sheyla Santana de, additional, Rocha, Francisco Costa da, additional, Nunes, Flavia Maria Palmeira, additional, Brito, Fabiana de Sousa Ferreira, additional, Diniz, Thaysa Alves Tavares, additional, Soares, Sarah de Oliveira, additional, Oliva, Lorena Daher Carneiro, additional, Dias, Ana Cleide da Silva, additional, and Barbosa, Amanda Borba, additional

Published
2023
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28. ANÁLISE EPIDEMIOLÓGICA DA TAXA DE INTERNAÇÕES HOSPITALARES POR ATEROSCLEROSE NO PIAUÍ DE 2012 A 2022

Author

OLIVEIRA, LUCAS SABINO, primary, SILVA, PEDRO HENRIQUE SOUSA DA, additional, AVELINO, JOÃO VITTOR DE SOUSA, additional, COSTA, IARA SABRINA PAREDE, additional, PERES, FRANCISCO EMANUEL ANDRADE, additional, ROCHA, FRANCISCO VINICIUS TELES, additional, PALOMBIT, KELLY, additional, CARDOSO, ARQUIMEDES CAVALCANTE, additional, CONDE JÚNIOR, AIRTON MENDES, additional, and LEITE, CARLA MARIA DE CARVALHO, additional

Published
2023
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30. DIAGNÓSTICO E TERAPÊUTICA DA TUBERCULOSE INFANTIL

Author

Vasconcelos, Anailda Fontenele, primary, Silva, Avelar Alves da, additional, Terto, Wesley Douglas da Silva, additional, Calaça, Mickaelle Bezerra, additional, Silva, Fabiana Parente Macário da, additional, Rocha, Francisco Vinicius Teles, additional, Sousa, Adriano Correia De, additional, Oliveira, Enos Vieira de, additional, Madureira, Gabriel Nunes, additional, Santos, Bárbara Sandra Pinheiro dos, additional, and Paiva, Taynara Viana, additional

Published
2023
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31. ATUAÇÃO DO PROFISSIONAL DE SAÚDE NO COMBATE A AUTOMEDICAÇÃO EM IDOSOS

Author

Silva Filho, Paulo Sérgio da Paz, primary, Silva, Avelar Alves da, additional, Barbosa, Teresinha de Jesus Alencar, additional, Terto, Wesley Douglas da Silva, additional, Rocha, Francisco Vinicius Teles, additional, Sousa, Adriano Correia De, additional, Chagas, Douglas Bento das, additional, Damacena, Denize Evanne Lima, additional, Madureira, Gabriel Nunes, additional, and Santos, Bárbara Sandra Pinheiro dos, additional

Published
2023
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34. Quantitative evaluation of very early cartilage damage in experimental osteoarthritis using scanning electron microscopy

Author

Girão-Carmona, Virgínia Cláudia Carneiro, Bezerra, Mirna Marques, Porto, Fernanda Maria Aragão Ximenes, Pinto, Ana Carolina Matias Dinelly, de Melo Nunes, Rodolfo, Alves, Anelise Maria Costa Vasconcelos, Campello, Claudio Cabral, de Melo Leite, Ana Caroline Rocha, de Castro Brito, Gerly Anne, and da Rocha, Francisco Airton Castro

Published
2022
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37. UMA ANÁLISE DOS PARÂMETROS DE QUALIDADE FÍSICO-QUÍMICA DE MEL PRODUZIDOS POR MORADORES DA REGIÃO DO MUNICÍPIO DE TEFÉ-AM

Author

Rocha, Evillin Camille Vitória Franco da, primary, Rocha, Francisco Rosa da, additional, Farias, Rinéias Cunha, additional, Junior, Paulo Sérgio Taube, additional, Santana, Ricardo Alexsandro de, additional, Cunhvvva, Remo Lima, additional, Gama, Laís Alves da, additional, Damasceno, Leandro Amorim, additional, and Campos, Willison Eduardo Oliveira, additional

Published
2022
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38. ALERGIA A HIMENÓPTEROS

Author

BRANDÃO, LARA BIANCA SOARES, primary, ROCHA, FRANCISCO FILIPY FERNANDES, additional, PETROLA, LUCIANA GONÇALVES MORAIS, additional, and SILVA, JOSÉ DILBERY OLIVEIRA DA, additional

Published
2022
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39. Multi-Agent System and Classification Algorithms Applied for eHealth in Order to Support the Referral of Post-operative Patients

Author

Loureiro, Tibério C. J., Neto, Afonso B. L., Rocha, Francisco A. A., Aguiar, Francisca A. R., Fernandez, Marcial P., Kacprzyk, Janusz, Series Editor, Pal, Nikhil R., Advisory Editor, Bello Perez, Rafael, Advisory Editor, Corchado, Emilio S., Advisory Editor, Hagras, Hani, Advisory Editor, Kóczy, László T., Advisory Editor, Kreinovich, Vladik, Advisory Editor, Lin, Chin-Teng, Advisory Editor, Lu, Jie, Advisory Editor, Melin, Patricia, Advisory Editor, Nedjah, Nadia, Advisory Editor, Nguyen, Ngoc Thanh, Advisory Editor, Wang, Jun, Advisory Editor, Novais, Paulo, editor, Lloret, Jaime, editor, Chamoso, Pablo, editor, Carneiro, Davide, editor, Navarro, Elena, editor, and Omatu, Sigeru, editor

Published
2020
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40. A new test for detecting specification errors in Gaussian linear mixed-effects models.

Author

Angel, Jairo A., Rocha, Francisco M.M., Vélez, Jorge I., and Singer, Julio M.

Subjects
FALSE positive error, RANDOM numbers, ERROR rates, COVARIANCE matrices, TEST methods
Abstract

Linear mixed-effects models (LMEMs) are widely used in medical, engineering, and social applications. The accurate specification of the covariance matrix structure within the error term is known to impact the estimation and inference procedures. Thus, it is crucial to detect the source of errors in LMEMs specifications. In this study, we propose combining a user-friendly computational test with an analytical method to visualize the source of errors. Through statistical simulations under different scenarios, we evaluate the performance of the proposed test in terms of the Power and Type I error rate. Our findings indicate that as the sample size n increases, the proposed test effectively detects misspecification in the systematic component, the number of random effects, the within-subject covariance structure, and the covariance structure of the error term in the LMEM with high Power while maintaining the nominal Type I error rate. Finally, we show the practical usefulness of our proposed test with a real-world application. [ABSTRACT FROM AUTHOR]

Published
2024
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