History and recent progress in ferroelectrets produced in Brazil
Altafim, Ruy Alberto Pisani, Altafim, Ruy Alberto Corrêa
Published in Journal of advanced dielectrics (01.08.2023)
Published in Journal of advanced dielectrics (01.08.2023)
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Journal Article
Fluoropolymer piezoelectrets with tubular channels: resonance behavior controlled by channel geometry
Pisani Altafim, Ruy Alberto, Corrêa Altafim, Ruy Alberto, Qiu, Xunlin, Raabe, Sebastian, Wirges, Werner, Basso, Heitor Cury, Gerhard, Reimund
Published in Applied physics. A, Materials science & processing (01.06.2012)
Published in Applied physics. A, Materials science & processing (01.06.2012)
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Journal Article
Localisation of inter-layer partial discharges in transformer windings by logistic regression and different features extracted from current signals
Júnior, Arismar M.G, de Paula, Hélder, Boaventura, Wallace C, Lopes, Sofia M.A, Flauzino, Rogério A, Alberto Correa Altafim, Ruy
Published in IET science, measurement & technology (20.12.2020)
Published in IET science, measurement & technology (20.12.2020)
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Journal Article
One-port nonlinear electric circuit for simulating grounding systems under impulse current
Corrêa Altafim, Ruy Alberto, Gonçalves, Luiz, Pisani Altafim, Ruy Alberto, Creppe, Renato Crivellari, Piantini, Alexandre
Published in Electric power systems research (01.01.2016)
Published in Electric power systems research (01.01.2016)
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Journal Article
Thermo-formed piezoelectrets with open-tubular channels produced from water-filled FEP pads
Olivato Assagra, Yuri Andrey, Correa Altafim, Ruy Alberto, Pisani Altafim, Ruy Alberto
Published in 2015 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) (01.10.2015)
Published in 2015 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) (01.10.2015)
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Conference Proceeding
Thin Teflon-FEP capacitors with open-tubular channels employed on low-pressure measurements for smart-grid monitoring systems
Lima Araujo, Ewerton Bruno, de Amorim, Mardson Freitas, Pisani Altafim, Ruy Alberto, Cavalcanti, Antonio Carlos, Correa Altafim, Ruy Alberto
Published in 2015 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) (01.10.2015)
Published in 2015 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) (01.10.2015)
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Conference Proceeding
Acoustic detection of single and multiple air-gap partial discharges with piezoelectrets transducers
Palito, Thamyres Tamulla Cavalcante, Assagra, Yuri Andrey Olivato, da Silva, Jose Francisco Resende, Altafim, Ruy Alberto Correa, Altafim, Ruy Alberto Pisani, Reis, Clovis Ferreira dos, de Amorim, Mardson Freitas, Cavalcanti, Antonio Carlos
Published in 2014 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) (01.10.2014)
Published in 2014 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) (01.10.2014)
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Conference Proceeding
Investigation of a Magnetic Levitation Architecture with a Ferrite Core for Energy Harvesting
Soares, Igor Nazareno, Altafim, Ruy Alberto Corrêa, Altafim, Ruy Alberto Pisani, Moreira, Melkzedekue de Moraes Alcântara Calabrese, Sousa, Felipe Schiavon Inocêncio de, Afonso, José A., Carmo, João Paulo, Flauzino, Rogério de Andrade
Published in Energies (Basel) (25.10.2024)
Published in Energies (Basel) (25.10.2024)
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Journal Article
Laminated composite based on polyester geotextile fibers and polyurethane resin for coating wood structures
Assagra, Yuri Andrey Olivato, Altafim, Ruy Alberto Pisani, Silva, José Francisco Resende da, Basso, Heitor Cury, Lahr, Francisco Antonio Rocco, Altafim, Ruy Alberto Corrêa
Published in Materials research (São Carlos, São Paulo, Brazil) (01.09.2013)
Published in Materials research (São Carlos, São Paulo, Brazil) (01.09.2013)
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Journal Article
Piezoelectric sensor based on electret thermoforming technology
Falconi, Daniel Rodrigo, Altafim, Ruy Alberto Correa, Altafim, Ruy Alberto Pisani, Basso, Heitor Cury, Wirges, Werner, Gerhard, Reimund
Published in 2010 10th IEEE International Conference on Solid Dielectrics (01.07.2010)
Published in 2010 10th IEEE International Conference on Solid Dielectrics (01.07.2010)
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Conference Proceeding
Dielectric resonance spectroscopy of piezoelectrets with tubular channels: Channel dimensions control resonances
Altafim, R A P, Basso, H C, Altafim, R A C, Wirges, W, Xunlin Qiu, Gerhard, R, Jenninger, W, Wagner, J
Published in 2010 10th IEEE International Conference on Solid Dielectrics (01.07.2010)
Published in 2010 10th IEEE International Conference on Solid Dielectrics (01.07.2010)
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Conference Proceeding
Electronic peak lightning current detector
Domingues, Cesar, Correa Altafim, Ruy Alberto, de Sousa, Felipe, Palito, Thamyres, Pisani Altafim, Ruy Alberto
Published in 2017 International Symposium on Lightning Protection (XIV SIPDA) (01.10.2017)
Published in 2017 International Symposium on Lightning Protection (XIV SIPDA) (01.10.2017)
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Conference Proceeding
Laminated tubular-channel ferroelectret systems from low-density polyethylene films and from fluoroethylene- propylene copolymer films - A comparison
Pisani Altafim, Ruy Alberto, Rychkov, D., Wirges, W., Gerhard, R., Basso, H. C., Correa Altafim, Ruy Alberto, Melzer, M.
Published in IEEE transactions on dielectrics and electrical insulation (01.08.2012)
Published in IEEE transactions on dielectrics and electrical insulation (01.08.2012)
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Journal Article
Detection of acoustic emissions from partial discharges in distribution transformers with piezoelectret transducers
Pagi Ferreira, Daniel Augusto, Correa Altafim, Ruy Alberto, Inocencio de Sousa, Felipe Schiavon, Cavalcante Palito, Thamyres Tamula, Olivato Assagra, Yuri Andrey, Pisani Altafim, Ruy Alberto
Published in 2017 IEEE Conference on Electrical Insulation and Dielectric Phenomenon (CEIDP) (01.10.2017)
Published in 2017 IEEE Conference on Electrical Insulation and Dielectric Phenomenon (CEIDP) (01.10.2017)
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Conference Proceeding
Wood cross-arms coated with polyurethane resin - tests and numerical simulations
Altafim, Ruy Alberto Correa, Silva, Jose Francisco Resende da, Gonzaga, Diógenes Pereira, Ribeiro, Cacilda, Godoy, João, Basso, Heitor Curry, Bueno, Benedito, Calil Júnior, Carlito, Sartori, Jose Carlos, Altafim, Ruy Alberto Pisani, Silveira, Alex
Published in Materials research (São Carlos, São Paulo, Brazil) (01.03.2006)
Published in Materials research (São Carlos, São Paulo, Brazil) (01.03.2006)
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Journal Article
Well-defined piezoelectrets fabricated with 3D printing technology
Olivato Assagra, Yuri Andrey, Correa Altafim, Ruy Alberto, Pereira do Carmo, Joao Paulo, Pisani Altafim, Ruy Alberto
Published in 2016 IEEE International Conference on Dielectrics (ICD) (01.07.2016)
Published in 2016 IEEE International Conference on Dielectrics (ICD) (01.07.2016)
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Conference Proceeding