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Investigadores :

Página personal del Dr. Carlos Negreira


http://www.rau.edu.uy/pedeciba/personas/negreira.htm

El Dr. Carlos Negreira es investigador Grado 5 en el Area Física del PEDECIBA. Ingresó al Programa en 1987. Desempeña sus actividades en el Instituto de Física, Facultad de Ciencias.

Líneas de investigación:

  • Acústica ultrasonora
  • Procesamiento de señales

    Dirección postal:
    Departamento de Materiales
    Instituto de Física,
    Facultad de Ciencias
    Universidad de la República
    Iguá 4225
    Montevideo 11400
    Uruguay
    tel: (+598 2) 525 8624-26
    fax: (+598 2) 525 8617
    e-mail :can@fisica.edu.uy



  • Publicaciones


    • Negreira C, Eiras JA, Aulet A.
      Sound field of ultrasonic composite-PZT pulse transducers
      Acustica (1992)

    • Negreira C, Martínez C
      Ultrasound attenuation estimation in biological tissue by Cepstrum
      Ultrasonics (1992)

    • Núñez I, Negreira C, Aulet A, Eiras JA, Bassora LA
      Acusto-optical analysis for resonance modes and transmitted field of piezocomposites 1-3 polymer
      Engenharia e Ciencia dos Materiais, pp: 709-712 (Dic. 1994) BR

    • Aulet A, Negreira C, Gómez H, Eiras JA, Bassora L
      Identification of lateral vibration modes of piezoelectric composites 1-3
      IEEE P. Ultrasonics, 2: 123-127 (1994)

    • Núñez I, Negreira C, ; Ferrari JA
      Amplitude measurements of acoustic fields by light reflection at the free surface of a liquid
      IEEE P: Ultrasonics, 2: 851-854 (1995)

    • Negreira C, Gómez H, Aulet A, Eiras JA, Bassora LA
      Analysis of cross-coupling characteristics of piezocomposites 1-3
      IEEE P. Ultrasonics, 2: 1023-1028 (Nov. 1995)

    • Negreira C, Núñez I
      Detection of evanescent acoustical waves by using dark-ground optical methods
      IEEE Internat Ultrasonic Proceed, 2: 793-797 (1996)

    • Gómez H, Negreira C, Aulet A, Eiras JA, Bassora LA
      Influence of the elastic characteristics of polymer/resin in lateral resonances of piezocomposites 1-3
      IEEE Internat Ultrasonic Proceed, 2: 1022-1025 (1996)

    • Gómez H, Aulet A, Negreira C, Eiras JA, Bassora LA
      Modos laterales de vibración en piezocomposites 1-3
      Engenharia e Ciencia dos Materiais (Dic. 1996)

    • Gwirc S, Gómez H, Negreira C, Malatto L
      Ultrasonic PZT gas sensor using thick film technology
      IEEE Internat Ultrasonic Symp Proceed, 1: 427-431 (1997)

    • Núñez I, Negreira C, Ferrari J
      Acoustic field imaging by light reflection at the free surface of a liquid
      Ultrasonics, 35: 595-598 (1998)

    • Cabeza C, Negreira C, Sicardi Schifino AC, Montaldo G
      Experimental detection of a subharmonic route to chaos in acoustic cavitation through the tuning of a piezoelectric cavity
      J Acoust Soc Am, 103-6: 3227-9 (1998)

    • Gómez H, Negreira C, Pérez N, Núñez I, Eiras JA
      Lateral modes and diffracted field behaviour in non-periodical 1-3 piezocomposite transducers
      IEEE International Ultrasonic Symposium Proceedings, 2, (Nov. 1998)

    • Núñez I, Negreira C
      Optical detection of evanescent ultrasound waves in water
      IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 45: 511-519 (1998)

    • Pardo H, Ortiz WA, Araújo Moreira F, Suescun L, Toby B, Quagliata E, Negreira CA, Prassides K, Mombrú AW
      Structure and magnetic properties in the La(1-x)PrxBaCuFeO5+d system
      Physica C, 312, vol. 1-2: 199-207 (1998)

    • Núñez I, Negreira C
      Avoiding diffraction grid effects in 1-3 PZT polymer transducers
      IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 46: 467-472 (1999)

    • Gómez H, Gwirc S, Negreira C, Malatto L
      Megahertz characteristics of thick film PZT resonators for gas sensing applications
      J Anal Chem, (April 1999)

    • Pérez N, Negreira C, Gómez H, Bello C
      Piezocomposite array transducers optimization by periodicity breaking
      IEEE International Ultrasonic Symposium Proceedings 2, (Oct. 1999)

    • Cabeza C, Negreira C, Sicardi Schifino AC, Gibiat V
      Experimental determination of point localized time correlation and power spectrum in a Faraday experiment
      Int J Bifurcation and Chaos, 10-10 (Oct. 2000)

    • Cabeza C, Negreira C, Sicardi Schifino AC, Gibiat V
      Temporal behavior in Faraday instability. An experimental study
      Physica A, 283: 250-254 (2000)

    • Núñez I, Ing RK, Negreira C, Fink M
      Transfer and Green functions based on modal analysis of Lamb waves generation
      J Acoust Soc Am, 107-5: 2370-2378 (2000)

    • Moreno Gobbi A, Pérez M, Negreira CA, García D, Eiras JA
      Ultrasonic attenuation and elastic modulus of ferroelectric ceramics
      Scripta Materialia, 43-3: 259-263 (2000)

    • Moreno Gobbi A, Pérez M, Paolini G, Negreira CA, García D, Eiras JA
      Ultrasound studies of phase transitions in tungsten bronze ferroelectric materials
      J Alloyd Compd, 310(1-2): 29-31 (2000)