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Ruy Alberto Corrêa Altafim
Ruy Alberto Corrêa Altafim
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Template-based fluoroethylenepropylene piezoelectrets with tubular channels for transducer applications
RAP Altafim, X Qiu, W Wirges, R Gerhard, RAC Altafim, HC Basso, ...
Journal of Applied Physics 106 (1), 2009
1742009
Piezoelectrets from thermo-formed bubble structures of fluoropolymer-electret films
RAC Altafim, HC Basso, RAP Altafim, L Lima, CV De Aquino, LG Neto, ...
IEEE transactions on dielectrics and electrical insulation 13 (5), 979-985, 2006
1212006
Ionic impurities in nematic liquid crystal displays
MR Costa, RAC Altafim, AP Mammana
Liquid Crystals 28 (12), 1779-1783, 2001
542001
Laminated tubular-channel ferroelectret systems from low-density polyethylene films and from fluoroethylene-propylene copolymer films-A comparison
RAP Altafim, D Rychkov, W Wirges, R Gerhard, HC Basso, RAC Altafim, ...
IEEE Transactions on Dielectrics and Electrical Insulation 19 (4), 1116-1123, 2012
422012
A novel method for electret production using impulse voltages
RAC Altafim, JA Giacometti, JM Janiszewski
IEEE transactions on electrical insulation 27 (4), 739-743, 1992
411992
Hydrophobicity classification of polymeric materials based on fractal dimension
D Thomazini, MV Gelfuso, RAC Altafim
Materials Research 11, 415-419, 2008
342008
Electrical modeling of liquid crystal displays-LCDs
MR Costa, RAC Altafim, AP Mammana
IEEE transactions on dielectrics and electrical insulation 13 (1), 204-210, 2006
332006
Incipient fault diagnosis in power transformers by data-driven models with over-sampled dataset
SM de Andrade Lopes, RA Flauzino, RAC Altafim
Electric Power Systems Research 201, 107519, 2021
312021
Practical methodology for modeling and simulation of a lightning protection system using metal-oxide surge arresters for distribution lines
MA Araujo, RA Flauzino, RAC Altafim, OE Batista, LA Moraes
Electric Power Systems Research 118, 47-54, 2015
302015
A system for simulataneous measurements of lightning induced voltages on lines with and without arresters
A Piantini, TO Carvalho, A Silva Neto, JM Janiszewski, RAC Altafim, ...
ICLP 2004. Proceedings, 2004
292004
Fluoropolymer piezoelectrets with tubular channels: resonance behavior controlled by channel geometry
RA Pisani Altafim, RA Corrêa Altafim, X Qiu, S Raabe, W Wirges, ...
Applied Physics A 107, 965-970, 2012
272012
Piezoelectricity in multi-air voids electrets
RAC Altafim, HC Basso, LG Neto, L Lima, RAP Altafim, CV De Aquino
CEIDP'05. 2005 Annual Report Conference on Electrical Insulation and …, 2005
252005
The effects of fillers on polyurethane resin-based electrical insulators
RAC Altafim, CR Murakami, S Claro Neto, LCR Araújo, GO Chierice
Materials Research 6, 187-191, 2003
252003
A new route to piezo-polymer transducers: 3D printing of polypropylene ferroelectrets
YAO Assagra, RAP Altafim, JP do Carmo, RAC Altafim, D Rychkov, ...
IEEE Transactions on Dielectrics and Electrical Insulation 27 (5), 1668-1674, 2020
202020
Piezoelectrets with well‐defined cavities produced from 3D‐printed acrylonitrile butadiene styrene structures
YAO Assagra, RAP Altafim, RAC Altafim, JP Carmo
Electronics Letters 51 (24), 2028-2030, 2015
192015
Hydrophone based on 3D printed polypropylene (PP) piezoelectret
TTC Palitó, YAO Assagra, RAP Altafim, JP Carmo, RAC Altafim
Electronics Letters 55 (4), 203-204, 2019
172019
Three-layer ferroelectrets from perforated Teflon®-PTFE films fused between two homogeneous Teflon®-FEP films
HC Basso, RAP Altafim, RAC Altafim, A Mellinger, P Fang, W Wirges, ...
2007 Annual Report-Conference on Electrical Insulation and Dielectric …, 2007
172007
Piezoelectricity of multi-layers space-charge electrets from Teflon FEP film with homogeneous voids distributed on its surface
RAC Altafim, C Dias, LG Neto, HC Basso, C Murakami, PR Veronese, ...
2003 Annual Report Conference on Electrical Insulation and Dielectric …, 2003
142003
A system for lightning induced voltages data acquisition: preliminary results
A Piantini, TO Carvalho, A Silva Neto, JM Janiszewski, RAC Altafim, ...
Proceedings: SIPDA, 2003
142003
Piezoelectrets: A brief introduction
M Moreira, IN Soares, YAO Assagra, FSI Sousa, TM Nordi, DM Dourado, ...
IEEE Sensors Journal 21 (20), 22317-22328, 2021
132021
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