A5029450562- Thermography and Photoacoustic Techniques
- Photoacoustic and Ultrasonic Imaging
- Calibration and Measurement Techniques
- Ultrasonics and Acoustic Wave Propagation
- Thermoelastic and Magnetoelastic Phenomena
- Laser Material Processing Techniques
- Fire effects on concrete materials
- Infrared Target Detection Methodologies
- Advanced Chemical Sensor Technologies
- Infrared Thermography in Medicine
- Motor Control and Adaptation
- Muscle activation and electromyography studies
- Advanced Fiber Optic Sensors
- Optical measurement and interference techniques
- Thermal Radiation and Cooling Technologies
- Effects of Vibration on Health
- Optical and Acousto-Optic Technologies
- Spectroscopy Techniques in Biomedical and Chemical Research
- Advanced Measurement and Detection Methods
- Air Quality Monitoring and Forecasting
- Thermal properties of materials
- Thermoregulation and physiological responses
- Composite Structure Analysis and Optimization
- Laser and Thermal Forming Techniques
University of Belgrade
2012-2024
Institute of Physics Belgrade
2022-2023
Zemun Hospital
2023
Vinča Institute of Nuclear Sciences
2007-2022
Institute of Economic Sciences
2008-2022
Institut za filozofiju
2021
Institut Bisnis Nusantara
2021
HUN-REN Institute for Nuclear Research
2012
In this paper, a self-consistent inverse procedure is developed for the estimation of linear thermal expansion coefficient and diffusivity solids from transmission photoacoustic measurement. This consists two single-parameter fitting processes applied alternately: phase data are fitted by shifting diffusion coefficient, while amplitude coefficient. Each process uses resulting parameter other, previously finished one, thus converging to best solution-pair achievable. numerical experiments,...
This paper presents a model for indirect photoacoustic response that includes thermal memory effects. At low frequencies, the reduces to well-known piston of given by Rosencweig and Gersho. However, at high presented predicts resonant behavior amplitudes phases determines respective frequencies. The results enable experimental determination standard properties solids (thermal diffusivity conductivity), as well properties, relaxation time, heat propagation speed.
In this paper, a theoretical model of temperature variations is derived for two-layer optically absorbing structure, including thermal memory effects. It considered that the structure surrounded by gas and illuminated on front side harmonically modulated laser beam. This based hyperbolic theory heat conduction Beer–Lambert's law absorption neglecting multiple optical reflections in each layer. The represents generalization current models two aspects. First, influence properties both layers...
In order to make the photothermal effect detectable from a sample with low optical absorption, an optically opaque layer must be applied on its surface. A model of induced temperature variations for such structure is derived, very thin coating non-illuminated (back) side and neglecting heat flux dissipation in coating. Validation performed by comparing obtained results corresponding two-layer model. The influence absorption surface both transparent semi-transparent film, whether film good or...
The paper presents conditions that should be met in order to make the photothermal induced temperature variations of a solid sample analogous voltage electric network with passive linear elements. Further analysis shows such analogy enhances experimental determination thermal properties thin layers by frequency method.
In this work, theoretically/mathematically simulated models are derived for the photoacoustic (PA) frequency response of both volume and surface optically-absorbing samples in a minimum PA cell. derivation process, thermal memory influence sample air gas column accounted for, as well measurement chain. Within analysis TMS model, optical, thermal, elastic properties was investigated. This revealed that some processes, characterized by certain properties, exert their dominance only limited...
In this paper, the possibility of determining thermal, elastic and geometric characteristics a thin TiO2 film deposited on silicon substrate, with thickness 30 μm, in frequency range 20 to kHz neural networks were analysed. For purpose, (thickness), thermal (thermal diffusivity, coefficient linear expansion) electronic parameters substrates known constant two-layer model, while following nano-layer thin-film changed: thickness, expansion diffusivity. Predictions these three analysed...
Summary The calculation of photothermal response detected by a microscope is presented. By using technique based on Green's functions and integral transforms, model for laser‐induced temperature distribution has been derived. mathematical method solution inverse problem proposed. It suggests that microscopy, besides imaging subsurface solids, the potential quantitative thermal analysis varioussamples.
In this work, thermoelastic component of the photoacoustic response is derived, including thermal memory material. The comparison between model and classic one, which does not account for influence made. It has been noticed that two models tend to overlap at very high low frequencies light modulation spectrum, while in middle range some deviations become more apparent, proves must be taken into account. also shown limits are function heat propagation velocity thickness sample. Based upon...