Adriano Alves Pereira

Universidade Federal de Uberlândia

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Adriano de Oliveira Andrade

Universidade Federal de Uberlândia

Marcus Fraga Vieira

Universidade Federal de Goiás

L.C. de Freitas

Universidade Federal de Uberlândia

Selma Terezinha Milagre

Universidade Federal de Uberlândia

V.J. Farias

Universidade Federal do Pará

J.B. Vieira

Universidade Federal de Uberlândia

Lígia Reis Nóbrega

Universidade Federal de Uberlândia

Luanne Cardoso Mendes

Universidade Federal de Uberlândia

Ariana Moura Cabral

Universidade Federal de Uberlândia

Eduardo Lázaro Martins Naves

Universidade Federal de Uberlândia

Cooperative Institutions

Universidade Federal de Uberlândia

189

Universidade de São Paulo

Ukrainian Free University

Universidade Federal de Goiás

Universidade Paulista

Centre for Advanced Study

Natural Selection (United States)

University of Toronto

Universidade Estadual de Londrina

Universidade Estadual Paulista (Unesp)

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Control de acceso remoto a redes industriales

Miguel Díaz-Cacho Andre Chaves Méndes Adriano Alves Pereira

El acceso remoto a redes industriales es una de las contribuciones que la Industria 4.0 ha popularizado al habilitarse la integración de las tecnologías TCP/IP en las redes OT y poder realizarse dicho acceso a través de la red pública Internet. De esa forma se posibilita ejecutar operaciones de mantenimiento de forma remota con mejoras en recursos y costes respecto a las opciones previas. No obstante, este acceso hace que los riesgos de seguridad aumenten al abrirse una nueva e importante vulnerabilidad y existir la posibilidad de acceso desde cualquier equipo conectado a Internet. Para poder gestionar de forma eficiente estos accesos remotos, este trabajo propone el uso del protocolo industrial de telemetría MQTT en el intercambio de comandos de control de acceso entre las partes implicadas. Ello permite una modalidad de acceso oportunista que disminuye cuantitivamente hasta en cuatro los niveles de seguridad requeridos según la norma IEC62443. La propuesta incluye una topología basada en tres elementos, el Ancla, el UNet y el Nauta y en tres servicios ofrecidos en formato Open-Source, el servicio de redirección de puertos, el servicio de acceso y el servicio de control de acceso.

10.17979/spudc.9788497498609.795

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Um estudo sobre o uso de modelos de Machine Learning para o diagnóstico da Doença de Parkinson por meio da análise de voz de pacientes

Zenodo (CERN European Organization for Nuclear Research) (2022)

Daniel Hilário da Silva Caio Tonus Ribeiro Adriano Alves Pereira

10.5281/zenodo.7490097

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Simulation of Electromyographic Signals Based on Point Distribution Model

IFMBE proceedings (2023)

Adriano de Oliveira Andrade Ariana Moura Cabral Marcus Fraga Vieira Adriano Alves Pereira

10.1007/978-3-031-49401-7_10

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A power factor correction preregulator AC-DC interleaved boost with soft-commutation

J.A.C. Pinto Adriano Alves Pereira V.J. Farias L.C. de Freitas J.B. Vieira

This work presents the operation and design of an AC-DC boost interleaved power factor correcting preregulator circuit using a nondissipative snubber and operating at 100 kHz per cell. By using interleaved converters, one can obtain an overall reduction of the boost inductor, together with reduced switching losses. The complete operating principles, theoretical analysis, relevant equations and simulation results are presented. Experimental results of a prototype rated at 500 Watts, with an input AC voltage of 150 Vrms and, an output of 250 Vdc has been obtained in laboratory.

Snubber

Commutation

Commutation cell

10.1109/pesc.1997.616698

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Citations (21)

Um Conversor Cuk Utilizando Uma Única Chave Ativa Com Chaveamento Suave

Eletrônica de Potência (2004)

Lúcio dos Reis Barbosa Adriano Alves Pereira Alceu Tarcisio Cezar

Este artigo apresenta uma nova topologia de um conversor Cuk, juntamente com um snubber não dissipativo para prover a comutação suave. O circuito proposto tem apenas uma chave ativa e funciona com modulação por largura de pulso (PWM). A comutação não dissipativa é conseguida através da inclusão de uma rede ressonante composta por um indutor, um capacitor e dois diodos. O interruptor autocomutado é colocado em condução com corrente nula, caracterizando o chaveamento por corrente nula (ZCS) e é bloqueado com tensão nula, caracterizando o chaveamento por tensão nula (ZVS). Como a transição de corrente durante a entrada em condução e a transição de tensão durante o bloqueio da chave não são abruptas, uma redução dos níveis da interferência eletromagnética torna-se previsível. Uma das principais vantagens deste conversor é que o circuito de ajuda à comutação não possui uma chave auxiliar, ou seja, a comutação suave é conseguida somente com componentes passivos. Adicionalmente o conversor pode funcionar com alto rendimento para uma ampla faixa de carga e em altas freqüências de chaveamento. Para ilustrar o princípio de funcionamento deste conversor, um estudo detalhado, incluindo simulações, é mostrado. A validade deste conversor é garantida pelos resultados experimentais obtidos.

10.18618/rep.2004.2.053060

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A comparison of three self-resonant PWM forward converter

C.P. Dias Adriano Alves Pereira J.B. Vieira V.J. Farias L.C. de Freitas

This paper presents a comparison of efficiency between three self-resonant PWM forward power converters. These structures are the association of the dissipative two transistor PWM forward converter with a nondissipative cell in three distinct ways. The complete operating principle, relevant equations, simulation, experimental results and efficiency of the three structures are presented.

10.1109/apec.1999.750503

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Wrist Rigidity Evaluation in Parkinson’s Disease: A Scoping Review

Healthcare (2022)

Camille Marques Alves Andressa Rastrelo Rezende Isabela Alves Marques Luanne Cardoso Mendes Ângela Abreu Rosa de Sá

(1) Background: One of the main cardinal signs of Parkinson's disease (PD) is rigidity, whose assessment is important for monitoring the patient's recovery. The wrist is one of the joints most affected by this symptom, which has a great impact on activities of daily living and consequently on quality of life. The assessment of rigidity is traditionally made by clinical scales, which have limitations due to their subjectivity and low intra- and inter-examiner reliability. (2) Objectives: To compile the main methods used to assess wrist rigidity in PD and to study their validity and reliability, a scope review was conducted. (3) Methods: PubMed, IEEE/IET Electronic Library, Web of Science, Scopus, Cochrane, Bireme, Google Scholar and Science Direct databases were used. (4) Results: Twenty-eight studies were included. The studies presented several methods for quantitative assessment of rigidity using instruments such as force and inertial sensors. (5) Conclusions: Such methods present good correlation with clinical scales and are useful for detecting and monitoring rigidity. However, the development of a standard quantitative method for assessing rigidity in clinical practice remains a challenge.

Rigidity (electromagnetism)

10.3390/healthcare10112178

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Electromiographic activity during single leg jump in adolescent athletes with chronic ankle instability: A pilot study

Journal of Bodywork and Movement Therapies (2021)

Paloma Gonçalves Mendes Adriano Alves Pereira Pedro Henrique Alves Abreu Matheus Rodrigues Campos Carolina Lins

Medius

Peroneus longus

Vertical jump

Motor Unit Recruitment

10.1016/j.jbmt.2021.06.001

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Peer Review #3 of "Open-source data management system for Parkinson’s disease follow-up (v0.2)"

João Paulo Folador Corresp Marcus Fraga Vieira Adriano Alves Pereira Adriano de Oliveira Andrade

Background.Parkinson's disease (PD) is a neurodegenerative condition of the central nervous system that causes motor and non-motor dysfunctions.The disease affects 1% of the world population over 60 years and remains cureless.Knowledge and monitoring of PD are essential to provide better living conditions for patients.Thus, diagnostic exams and monitoring of the disease can generate a large amount of data from a given patient.This study proposes the development and usability evaluation of an integrated system, which can be used in clinical and research settings to manage biomedical data collected from PD patients. Methods.A system, so-called SIDABI (Integrated Biomedical Data System), was designed following the model-view-controller (MVC) standard.A modularized architecture was created in which all the other modules are connected to a central security module.Thirty-six examiners evaluated the system usability through the System Usability Scale (SUS).The agreement between examiners was measured by Kendall's coefficient with a significance level of 1%. Results.The free and open-source web-based system was implemented using modularized and responsive methods to adapt the system features on multiple platforms.The mean SUS score was 82.99 ± 13.97 points.The overall agreement was 70.2%, as measured by Kendall's coefficient (p < 0.001). Conclusion.According to the SUS scores, the developed system has good usability.The system proposed here can help researchers to organize and share information, avoiding data loss and fragmentation.Furthermore, it can help in the follow-up of PD patients, in the training of professionals involved in the treatment of the disorder, and in studies that aim to find hidden correlations in data.

10.7287/peerj-cs.396v0.2/reviews/3

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Performance of ChatGPT in French language analysis of multimodal retinal cases

Journal Français d Ophtalmologie (2024)

David Mikhail Andrew Mihalache Renyu Huang Thomas Khairy Marko Popović

10.1016/j.jfo.2024.104391

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