Luiz Miranda - Academia.edu (original) (raw)
Uploads
Papers by Luiz Miranda
Optical Engineering, 1997
Zeitschrift f�r Lebensmittel-Untersuchung und -Forschung, 1995
Page 1. Z Lebensm Unters Forsch (1995) 201:236 240 Zeitschriftf~r Lebensmittei o und-Forschung 9 ... more Page 1. Z Lebensm Unters Forsch (1995) 201:236 240 Zeitschriftf~r Lebensmittei o und-Forschung 9 Springer-Verlag 1995 Original paper The influence of slaked lime content on the processing conditions of cooked maize tortillas: changes of thermal, ...
Journal of Applied Physics, 1987
Minimal-volume photoacoustic cell measurement of thermal diffusivity: Effect of the thermoelastic... more Minimal-volume photoacoustic cell measurement of thermal diffusivity: Effect of the thermoelastic sample bending LF Perondi and L CM Miranda Ministério da Ciência e Tecnologia, Instituto de Pesquisas Espaciais, Laboratòrio Associado de Sensores e Materiais, Caixa Postal ...
Journal of Applied Physics, 1989
The Ar+ laser-stimulated desorption of iodine molecules from an impregnated polystyrene film was ... more The Ar+ laser-stimulated desorption of iodine molecules from an impregnated polystyrene film was investigated. The photoprocess induces a color change (from red to the transparent) and leaves in the film a marked print, which is related to the laser beam characteristics. The experimental data was fitted using a set of differential equations relating the time dependence of the film temperature
In this work we are proposing a new experimental configuration based in the use of two sensors to... more In this work we are proposing a new experimental configuration based in the use of two sensors to allow the simultaneous measurement of both thermal diffusivity and effusivity of the sample. This Dual Sensor Photopyroeletric - DSPPE configuration implies in a single experiment and any calibration is required. Temperature dependent experiments are allowed from a cell equipped with Peltier elements. Substituting the upper sensor for a quartz window spectroscopic experiments are permitted. Water and margarine with different fat content were used as testing samples. (Received on June 29, 2000 accepted on October 30, 2000) Photopyroeletric - PPE schemes have been used in the determination of the dynamic (diffusivity α, effusivity e and conductivity k) and static (specific heat c) thermal properties of liquid and pasty materials (01-06). Two main configurations have been usually employed, namely the SPPE (Standard or Back) and the IPPE (Inverse or Front), depending upon which surface the modulated incident light reaches first, of the sample or of the pyroeletric sensor, respectively. For some specific thermal and optical features of sample and sensor, usually one obtains the thermal diffusivity α from an experiment using the SPPE configuration (which serves also for spectroscopic purposes) and the thermal effusivity e from an experiment using the IPPE configuration. In the last case it is still necessary to calibrate the experiment using a standard, usually water. Being in possession of α and e data one can obtain the value for the thermal conductivity k from α = e k and that for the
Physical Review B
ABSTRACT
Physical review. B, Condensed matter
ABSTRACT
Physical Review A
ABSTRACT
Journal of Physics B Atomic and Molecular Physics
ABSTRACT
Optical Engineering, 1997
Zeitschrift f�r Lebensmittel-Untersuchung und -Forschung, 1995
Page 1. Z Lebensm Unters Forsch (1995) 201:236 240 Zeitschriftf~r Lebensmittei o und-Forschung 9 ... more Page 1. Z Lebensm Unters Forsch (1995) 201:236 240 Zeitschriftf~r Lebensmittei o und-Forschung 9 Springer-Verlag 1995 Original paper The influence of slaked lime content on the processing conditions of cooked maize tortillas: changes of thermal, ...
Journal of Applied Physics, 1987
Minimal-volume photoacoustic cell measurement of thermal diffusivity: Effect of the thermoelastic... more Minimal-volume photoacoustic cell measurement of thermal diffusivity: Effect of the thermoelastic sample bending LF Perondi and L CM Miranda Ministério da Ciência e Tecnologia, Instituto de Pesquisas Espaciais, Laboratòrio Associado de Sensores e Materiais, Caixa Postal ...
Journal of Applied Physics, 1989
The Ar+ laser-stimulated desorption of iodine molecules from an impregnated polystyrene film was ... more The Ar+ laser-stimulated desorption of iodine molecules from an impregnated polystyrene film was investigated. The photoprocess induces a color change (from red to the transparent) and leaves in the film a marked print, which is related to the laser beam characteristics. The experimental data was fitted using a set of differential equations relating the time dependence of the film temperature
In this work we are proposing a new experimental configuration based in the use of two sensors to... more In this work we are proposing a new experimental configuration based in the use of two sensors to allow the simultaneous measurement of both thermal diffusivity and effusivity of the sample. This Dual Sensor Photopyroeletric - DSPPE configuration implies in a single experiment and any calibration is required. Temperature dependent experiments are allowed from a cell equipped with Peltier elements. Substituting the upper sensor for a quartz window spectroscopic experiments are permitted. Water and margarine with different fat content were used as testing samples. (Received on June 29, 2000 accepted on October 30, 2000) Photopyroeletric - PPE schemes have been used in the determination of the dynamic (diffusivity α, effusivity e and conductivity k) and static (specific heat c) thermal properties of liquid and pasty materials (01-06). Two main configurations have been usually employed, namely the SPPE (Standard or Back) and the IPPE (Inverse or Front), depending upon which surface the modulated incident light reaches first, of the sample or of the pyroeletric sensor, respectively. For some specific thermal and optical features of sample and sensor, usually one obtains the thermal diffusivity α from an experiment using the SPPE configuration (which serves also for spectroscopic purposes) and the thermal effusivity e from an experiment using the IPPE configuration. In the last case it is still necessary to calibrate the experiment using a standard, usually water. Being in possession of α and e data one can obtain the value for the thermal conductivity k from α = e k and that for the
Physical Review B
ABSTRACT
Physical review. B, Condensed matter
ABSTRACT
Physical Review A
ABSTRACT
Journal of Physics B Atomic and Molecular Physics
ABSTRACT