RSS 1.0Departamento de Matemática
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Supragingival and subgingival microbiota from patients with poor oral hygiene submitted to radiotherapy for head and neck cancer treatment
Gaetti-Jardim, Elerson
; ; Schweitzer, Christiane Marie ; ; ; ; (Archives of Oral Biology, 2018) [Artigo]
Objective: This case-control study aimed to evaluate the effects of conventional radiotherapy (RT) on the prevalence and populations of oral microorganisms in head and neck cancer patients who did not receive adequate ... -
The use of trend lines channels and remaining useful life prediction
Barbanti, Luciano; Damasceno, Berenice Camargo ; Carlos Gonçalves, Aparecido ; Kuzminskas, Hadamez (Probabilistic Prognostics and Health Management of Energy Systems, 2017) [Capítulo de livro]
One of the most important aspects in a working machine is the remaining useful life (RUL) of its components. Prognostics in this case depends on establishing the cause-effect entries in the process as well as how it behaves ... -
The derivative as a probabilistic synthesis of past and future data and remaining useful life prediction
Damasceno, Berenice Camargo; Barbanti, Luciano ; Kuzminskas, Hadamez ; Bazani, Márcio Antonio (Probabilistic Prognostics and Health Management of Energy Systems, 2017) [Capítulo de livro]
The concept of remaining useful life (RUL) is crucial when dealing with mechanical systems. RUL is taken into account in a system through a series of prognostics and the study of stability in a related data series. This ... -
A review of crack propagation modeling using peridynamics
; Bazani, Márcio Antonio; Paschoalini, Amarildo Tabone ; Barbanti, Luciano (Probabilistic Prognostics and Health Management of Energy Systems, 2017) [Capítulo de livro]
Improvements on prognostics and health management (PHM) techniques are extremely important in order to prevent system failure and reduce costs with maintenance and machine downtime. In the particular case of system components ... -
Comparative study of the dynamics between rolling bearings of a dynamic rotor
Outa, Roberto; Chavarette, Fabio Roberto ; Faria, Glaucia Amorim (International Journal of Pure and Applied Mathematics, 2015) [Artigo]
The purpose of this research is to analyze the phenomena connected to a shaft supported by two roller bearings using the concept and theory of Jeffcott rotors, whose dynamic behavior at a given speed, can represent phenomena ... -
Dynamics and control design via LQR and SDRE methods for a maglev system
Cabral, Thalles Denner Ferreira; Chavarette, Fábio Roberto (International Journal of Pure and Applied Mathematics, 2015) [Artigo]
Several experimental maglev systems all around the world, mainly in Germany and Japan have demonstrated that this mode of transportation can profitably compete with air travel. However, a system such as the German maglev ... -
Control instability applied to a micro electro mechanical actuator system (mems)
De Conde, Kevin Eduardo; Chavarette, Fábio Roberto (Advanced Materials Research, 2014) [Trabalho apresentado em evento]
MicroElectroMechanical Systems (MEMS) are devices what have been considered the technology of the future, being used in too many areas. MEMS are a combination of microstructures, micro sensors and micro actuators. The ... -
Non-linear energy harvesting system efficiency comparison from periodic to non-ideal excitation
Da Costa Ferreira, Douglas; Chavarette, Fábio Roberto ; Peruzzi, Nelson José (International Journal of Pure and Applied Mathematics, 2014) [Artigo]
Dynamics of a non-linear energy harvesting is affected by excitation source and to explore efficiency it is necessary to understand which region offers more energy and the influence of a forced periodic vibration related ... -
Fenichel theory for multiple time scale singular perturbation problems
Cardin, Pedro Toniol; (SIAM Journal on Applied Dynamical Systems, 2017) [Artigo]
This paper is concerned with a geometric study of singularly perturbed systems of ordinary differential equations expressed by (n-1)-parameter families of smooth vector fields on ℝl, where n ≥ 2. The inherent characteristic ... -
Ocorrência de diclofenaco e naproxeno em água superficial no município de Três Lagoas (MS) e a influência da temperatura da água na detecção desses anti-inflamatórios
Américo-Pinheiro, Juliana Heloisa Pinê; Isique, William Deodato ; ; Machado, Angela Aparecida ; De Carvalho, Sérgio Luís ; Valério Filho, Walter Veriano ; (Engenharia Sanitaria e Ambiental, 2017) [Artigo]
The aims of this study were to evaluate the presence and concentration of the anti-inflammatory drugs diclofenac and naproxen in an urban stream located in Três Lagoas, Mato Grosso do Sul, Brazil, that receives effluent ... -
A Dynamic-State Feedback Approach Employing a New State-Space Description for the Fast Wavelet Transform with Multiple Decomposition Levels
Uzinski, J. C.; ; ; Assunção, E. ; ; Villarreal, F. (Journal of Control, Automation and Electrical Systems, 2017) [Artigo]
This research paper proposes a wavelet-based dynamic-state feedback control strategy in the discrete time domain. In this proposal, the state feedback employs a state-space description for the fast wavelet transform, which ... -
An immunological approach based on the negative selection algorithm for real noise classification in speech signals
Abreu, Caio Cesar Enside de; ; Villarreal, Francisco (AEU - International Journal of Electronics and Communications, 2017) [Artigo]
This paper presents a new approach to detect and classify background noise in speech sentences based on the negative selection algorithm and dual-tree complex wavelet transform. The energy of the complex wavelet coefficients ... -
Transcritical and zero-Hopf bifurcations in the Genesio system
Cardin, Pedro Toniol; (Nonlinear Dynamics, 2017) [Artigo]
In this paper we study the existence of transcritical and zero-Hopf bifurcations of the third-order ordinary differential equation x⃛ + ax¨ + bx˙ + cx- x2= 0 , called the Genesio equation, which has a unique quadratic ... -
Treponema species in the subgingival microflora of ovine periodontitis
Borsanelli, A. C.; Ramos, T. N.M. ; Gaetti-Jardim, E. ; Schweitzer, C. M. (Veterinary Record, 2017) [Artigo]
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Soil CO2–C Emissions and Correlations with Soil Properties in Degraded and Managed Pastures in Southern Brazil
Figueiredo, Eduardo Barretto de; Panosso, Alan Rodrigo ; Bordonal, Ricardo de Oliveira ; Teixeira, Daniel De Bortoli ; Berchielli, Telma Teresinha ; La Scala, Newton (Land Degradation and Development, 2017) [Artigo]
Land degradation has been a global environmental issue, and its cause includes poorly managed grazing. Quantitative information is needed to support policy actions for food and water security and development. The objective ... -
Estudo de correlação e descrição histopatológica das lesões intestinais de cães infectados com Leishmania infantum
Silva, Diogo Tiago; Neves, Maria Francisca ; de Queiroz, Nina Mari Gual Pimenta ; Spada, Julio Cesar Pereira ; Alves, Maria Luana ; Flóro e Silva, Marina ; ; Panosso, Alan Rodrigo ; ; Starke-Buzetti, Wilma Aparecida (Revista Brasileira de Parasitologia Veterinaria, 2016) [Artigo]
The aim of this work was a correlation study and histopathological description of alterations associated with the presence of Leishmania infantum amastigote in the intestinal wall of dogs infected with canine visceral ... -
Presence of Porphyromonas and Prevotella species in the oral microflora of cattle with periodontitis
Borsanelli, Ana Carolina; Júnior, Elerson Gaetti-Jardim ; Schweitzer, Christiane Marie ; ; Dutra, Iveraldo S. (Pesquisa Veterinaria Brasileira, 2015) [Artigo]
Bovine periodontitis is a progressive purulent infectious process associated with the presence of strictly and facultative anaerobic subgingival biofilm and epidemiologically related to soil management in large geographic ... -
Modeling sugarcane ripening as a function of accumulated rainfall in Southern Brazil
; ; Panosso, Alan R.; ; (International Journal of Biometeorology, 2015) [Artigo]
The effect of weather variables on sugarcane ripening is a process still not completely understood, despite its huge impact on the quality of raw material for the sugar energy industry. The aim of the present study was to ... -
Discontinuous dynamic equations on time scales
dos Santos, Iguer Luis Domini (Rendiconti del Circolo Matematico di Palermo, 2015) [Artigo]
We introduce and prove the existence of Hermes, Filippov, and Krasovskii generalized solutions to discontinuous dynamic equations on time scales. We also consider comparisons between the Carathéodory, Euler, Filippov, ... -
Chaos control via state-dependent riccati equation method applied a non-ideal vibration absorber coupled to a nonlinear oscillator
Chavarette, Fabio Roberto; Peruzzi, Nelson Jose ; ; (International Journal of Pure and Applied Mathematics, 2015) [Artigo]
The non-ideal vibration absorber system coupled to a nonlinear oscillator is proposed in the paper. This system is demonstrated with a chaotic behavior and we present the control technical for the chaos stabilization. The ...