mariya mariya | University of Gdansk (original) (raw)
Papers by mariya mariya
Proceedings of Spie the International Society For Optical Engineering, Oct 30, 1992
These proceedings includes papers on the imaging properties of SAM, acoustooptic image correlator... more These proceedings includes papers on the imaging properties of SAM, acoustooptic image correlators, ultrasound light diffraction, the acoustooptics of semiconductor crystals and superlattices, and the acoustooptical examination of material properties. Attention is also given to photoacoustic imaging of semiconductor structures, acoustooptic devices for digital optical holographic gratings, time-frequency analysis of pulsed photoacoustic signals, the acoustooptical confirmation of the localized wave phenomena, and acoustooptic interactions in nematic liquid crystal. Other papers are on the photodeflection spectroscopy of the flowing gyrotropic media, photoacoustic spectra of malachite green adsorbed on silica gel surface, optoacoustic spectroscopy of bromobenzene under high pressure up to 100 MPa, an acoustic technique for measurements of ultrasonic velocity and absorption in liquids under high pressures up to 1000 MPa, and the physics and technology of ultrasound in Moscow. (No individual items are abstracted in this volume)
Journal De Physique Iv, Oct 1, 2004
Thermal effusivity, e, of water solutions of ethyl alcohol has been determined at the room temper... more Thermal effusivity, e, of water solutions of ethyl alcohol has been determined at the room temperature by means of photoacoustic (PA) method versus alcohol concentration. The velocity of ultrasound (v) and the density (rho) have been measured in the temperature range from 288.15 to 328.15 K. Based on the data obtained, the adiabatic compressibility coefficient beta has been calculated from Laplace's equation beta=(rho v^2)-0.5 The variations of beta with concentration (mu: mole fraction) and temperature have been studied. The compressibility isotherms plotted versus mole fraction of ethyl alcohol intersect approximately at a common point (mu_S) before reaching minimum values. Structural interactions and formation of a compact pseudo-stable structure in the region of a very low ethyl alcohol concentration have been suggested based on the results of the thermal effusivity and adiabatic compressibility determination.
Proceedings of Spie the International Society For Optical Engineering, Oct 1, 1995
Archives of Acoustics, 2014
Archives of Acoustics, 2013
Two violins were investigated. The only intentionally introduced difference between them was the ... more Two violins were investigated. The only intentionally introduced difference between them was the type of varnish. One of the instruments was covered with a spirit varnish, the other was oil varnished. Experimental modal analysis was done for unvarnished/varnished violins and a questionnaire inquiry on the instrument's sound quality was performed. The aim of both examinations was to find differences and similarities between the two instruments in the objective (modal parameters) and subjective domain (subjective evaluation of sound quality). In the modal analysis, three strongly radiating signature modes were taken into account. Varnishing did not change the sequence of mode shapes. Modal frequencies A0 and B(1+) were not changed by oil varnishing compared to the unvarnished condition. For the oil varnished instrument, the frequency of mode B(1+) was lower than that of the same mode of the spirit varnished instrument. Our two violins were not excellent instruments, but before varnishing they were practically identical. However, after varnishing it appeared that the oil-varnished violin was better than the spirit-varnished instrument. Therefore, it can be assumed with a fairly high probability that also in general, the oil-varnished violins sound somewhat better than initially identical spirit-varnished ones.
Archives of Acoustics, 2011
parabolic piezoelectric transducers is theoretically investigated. It is shown that the acoustic ... more parabolic piezoelectric transducers is theoretically investigated. It is shown that the acoustic fields have a complicated amplitude-phase structure changing with the acoustic frequency. Principal characteristics of acousto-optic interaction are examined. It is demonstrated that the diffraction efficiency in the Bragg regime can approach 100% in spite of a noticeable phase mismatch.
Journal of Molecular Structure, 2015
ABSTRACT Molecular Dynamics (MD) simulations are used for the investigation of molecular motions ... more ABSTRACT Molecular Dynamics (MD) simulations are used for the investigation of molecular motions in pyridine in the temperature range 20–480 K under normal pressure. The results obtained are analyzed within the frame of the Mori Zwanzig memory function formalism. An analytical approximation of the first memory function K(t) is applied to predict some dependences on temperature. Experimental results of the Rayleigh scattering of depolarized light from liquid pyridine are used as the main base for the comparison.
Archives of Acoustics, 2013
Two violins were investigated. The only intentionally introduced difference between them was the ... more Two violins were investigated. The only intentionally introduced difference between them was the type of varnish. One of the instruments was covered with a spirit varnish, the other was oil varnished. Experimental modal analysis was done for unvarnished/varnished violins and a questionnaire inquiry on the instrument's sound quality was performed. The aim of both examinations was to find differences and similarities between the two instruments in the objective (modal parameters) and subjective domain (subjective evaluation of sound quality). In the modal analysis, three strongly radiating signature modes were taken into account. Varnishing did not change the sequence of mode shapes. Modal frequencies A0 and B(1+) were not changed by oil varnishing compared to the unvarnished condition. For the oil varnished instrument, the frequency of mode B(1+) was lower than that of the same mode of the spirit varnished instrument. Our two violins were not excellent instruments, but before varnishing they were practically identical. However, after varnishing it appeared that the oil-varnished violin was better than the spirit-varnished instrument. Therefore, it can be assumed with a fairly high probability that also in general, the oil-varnished violins sound somewhat better than initially identical spirit-varnished ones.
Archives of Acoustics, 2015
Experimental modal analysis of a violin with three different tensions of a bass bar has been perf... more Experimental modal analysis of a violin with three different tensions of a bass bar has been performed. The bass bar tension is the only intentionally introduced modification of the instrument. The aim of the study was to find differences and similarities between top plate modal parameters determined by a bass bar perfectly fitting the shape of the top plate, the bass bar with a tension usually applied by luthiers (normal), and the tension higher than the normal value. In the modal analysis four signature modes are taken into account. Bass bar tension does not change the sequence of mode shapes. Changes in modal damping are insignificant. An increase in bass bar tension causes an increase in modal frequencies A0 and B(1+) and does not change the frequencies of modes CBR and B(1−).
Archives of Acoustics, 2015
One-dimensional experimental modal analysis of an unvarnished trapezoidal violin built after the ... more One-dimensional experimental modal analysis of an unvarnished trapezoidal violin built after the description of F. Savart and an anonymous trapezoidal violin on display in the Music Instrument Museum of Brussels is described. The analysis has revealed ten prominent modes. A mode that may potentially play a role of the "tonal barometer" of the instrument is pointed out. The mode shapes are symmetric and of high amplitude, due to the construction of the instrument. Subjective evaluation of the sound quality demonstrated no pronounced difference between the trapezoidal violin and normal violin.
Ultrasonics, Jan 22, 2006
Ultrasonic studies of the group of halogens of benzene and particularly dependence of acoustic pa... more Ultrasonic studies of the group of halogens of benzene and particularly dependence of acoustic parameters on the structure of organic liquids, demonstrate some interesting regularities in the group of these compounds in gas and liquid states. In this paper results for five cyclic liquids: bromo-, chloro-, fluoro- and jodobenzene are discussed and compared to benzene. Vibrational relaxation was observed in all the compounds. The studies reported here as well as other experimental for great number of compounds support the conclusion that almost all vibrational relaxation processes in liquids can be described using a single relaxation time. It also seems that all vibrational degrees of freedom of the molecule take part in this vibrational process. It seems that differences in transition probabilities between molecules studied could be caused by additional attraction between of molecules having a significant dipole moments.
ABSTRACT After a short description of the Ultrasonic Polar Scan Technique for characterizing comp... more ABSTRACT After a short description of the Ultrasonic Polar Scan Technique for characterizing composites, the paper describes and experimental method, based on the combination of Schlieren photography and a wide bounded ultrasonic beam of frequency 10 MHz, used to detect the fiber direction in composites. Experiments are described on unidirectional and fabric fiber reinforced composites. This method is not based on Lamb wave phenomena, which can be complicated for interpretation by NDT engineers, but rather is based on relatively simple principles, i.e. inhomogeneity and symmetry of composites.© (2005) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Proceedings of Spie the International Society For Optical Engineering, Oct 30, 1992
These proceedings includes papers on the imaging properties of SAM, acoustooptic image correlator... more These proceedings includes papers on the imaging properties of SAM, acoustooptic image correlators, ultrasound light diffraction, the acoustooptics of semiconductor crystals and superlattices, and the acoustooptical examination of material properties. Attention is also given to photoacoustic imaging of semiconductor structures, acoustooptic devices for digital optical holographic gratings, time-frequency analysis of pulsed photoacoustic signals, the acoustooptical confirmation of the localized wave phenomena, and acoustooptic interactions in nematic liquid crystal. Other papers are on the photodeflection spectroscopy of the flowing gyrotropic media, photoacoustic spectra of malachite green adsorbed on silica gel surface, optoacoustic spectroscopy of bromobenzene under high pressure up to 100 MPa, an acoustic technique for measurements of ultrasonic velocity and absorption in liquids under high pressures up to 1000 MPa, and the physics and technology of ultrasound in Moscow. (No individual items are abstracted in this volume)
Journal De Physique Iv, Oct 1, 2004
Thermal effusivity, e, of water solutions of ethyl alcohol has been determined at the room temper... more Thermal effusivity, e, of water solutions of ethyl alcohol has been determined at the room temperature by means of photoacoustic (PA) method versus alcohol concentration. The velocity of ultrasound (v) and the density (rho) have been measured in the temperature range from 288.15 to 328.15 K. Based on the data obtained, the adiabatic compressibility coefficient beta has been calculated from Laplace's equation beta=(rho v^2)-0.5 The variations of beta with concentration (mu: mole fraction) and temperature have been studied. The compressibility isotherms plotted versus mole fraction of ethyl alcohol intersect approximately at a common point (mu_S) before reaching minimum values. Structural interactions and formation of a compact pseudo-stable structure in the region of a very low ethyl alcohol concentration have been suggested based on the results of the thermal effusivity and adiabatic compressibility determination.
Proceedings of Spie the International Society For Optical Engineering, Oct 1, 1995
Archives of Acoustics, 2014
Archives of Acoustics, 2013
Two violins were investigated. The only intentionally introduced difference between them was the ... more Two violins were investigated. The only intentionally introduced difference between them was the type of varnish. One of the instruments was covered with a spirit varnish, the other was oil varnished. Experimental modal analysis was done for unvarnished/varnished violins and a questionnaire inquiry on the instrument's sound quality was performed. The aim of both examinations was to find differences and similarities between the two instruments in the objective (modal parameters) and subjective domain (subjective evaluation of sound quality). In the modal analysis, three strongly radiating signature modes were taken into account. Varnishing did not change the sequence of mode shapes. Modal frequencies A0 and B(1+) were not changed by oil varnishing compared to the unvarnished condition. For the oil varnished instrument, the frequency of mode B(1+) was lower than that of the same mode of the spirit varnished instrument. Our two violins were not excellent instruments, but before varnishing they were practically identical. However, after varnishing it appeared that the oil-varnished violin was better than the spirit-varnished instrument. Therefore, it can be assumed with a fairly high probability that also in general, the oil-varnished violins sound somewhat better than initially identical spirit-varnished ones.
Archives of Acoustics, 2011
parabolic piezoelectric transducers is theoretically investigated. It is shown that the acoustic ... more parabolic piezoelectric transducers is theoretically investigated. It is shown that the acoustic fields have a complicated amplitude-phase structure changing with the acoustic frequency. Principal characteristics of acousto-optic interaction are examined. It is demonstrated that the diffraction efficiency in the Bragg regime can approach 100% in spite of a noticeable phase mismatch.
Journal of Molecular Structure, 2015
ABSTRACT Molecular Dynamics (MD) simulations are used for the investigation of molecular motions ... more ABSTRACT Molecular Dynamics (MD) simulations are used for the investigation of molecular motions in pyridine in the temperature range 20–480 K under normal pressure. The results obtained are analyzed within the frame of the Mori Zwanzig memory function formalism. An analytical approximation of the first memory function K(t) is applied to predict some dependences on temperature. Experimental results of the Rayleigh scattering of depolarized light from liquid pyridine are used as the main base for the comparison.
Archives of Acoustics, 2013
Two violins were investigated. The only intentionally introduced difference between them was the ... more Two violins were investigated. The only intentionally introduced difference between them was the type of varnish. One of the instruments was covered with a spirit varnish, the other was oil varnished. Experimental modal analysis was done for unvarnished/varnished violins and a questionnaire inquiry on the instrument's sound quality was performed. The aim of both examinations was to find differences and similarities between the two instruments in the objective (modal parameters) and subjective domain (subjective evaluation of sound quality). In the modal analysis, three strongly radiating signature modes were taken into account. Varnishing did not change the sequence of mode shapes. Modal frequencies A0 and B(1+) were not changed by oil varnishing compared to the unvarnished condition. For the oil varnished instrument, the frequency of mode B(1+) was lower than that of the same mode of the spirit varnished instrument. Our two violins were not excellent instruments, but before varnishing they were practically identical. However, after varnishing it appeared that the oil-varnished violin was better than the spirit-varnished instrument. Therefore, it can be assumed with a fairly high probability that also in general, the oil-varnished violins sound somewhat better than initially identical spirit-varnished ones.
Archives of Acoustics, 2015
Experimental modal analysis of a violin with three different tensions of a bass bar has been perf... more Experimental modal analysis of a violin with three different tensions of a bass bar has been performed. The bass bar tension is the only intentionally introduced modification of the instrument. The aim of the study was to find differences and similarities between top plate modal parameters determined by a bass bar perfectly fitting the shape of the top plate, the bass bar with a tension usually applied by luthiers (normal), and the tension higher than the normal value. In the modal analysis four signature modes are taken into account. Bass bar tension does not change the sequence of mode shapes. Changes in modal damping are insignificant. An increase in bass bar tension causes an increase in modal frequencies A0 and B(1+) and does not change the frequencies of modes CBR and B(1−).
Archives of Acoustics, 2015
One-dimensional experimental modal analysis of an unvarnished trapezoidal violin built after the ... more One-dimensional experimental modal analysis of an unvarnished trapezoidal violin built after the description of F. Savart and an anonymous trapezoidal violin on display in the Music Instrument Museum of Brussels is described. The analysis has revealed ten prominent modes. A mode that may potentially play a role of the "tonal barometer" of the instrument is pointed out. The mode shapes are symmetric and of high amplitude, due to the construction of the instrument. Subjective evaluation of the sound quality demonstrated no pronounced difference between the trapezoidal violin and normal violin.
Ultrasonics, Jan 22, 2006
Ultrasonic studies of the group of halogens of benzene and particularly dependence of acoustic pa... more Ultrasonic studies of the group of halogens of benzene and particularly dependence of acoustic parameters on the structure of organic liquids, demonstrate some interesting regularities in the group of these compounds in gas and liquid states. In this paper results for five cyclic liquids: bromo-, chloro-, fluoro- and jodobenzene are discussed and compared to benzene. Vibrational relaxation was observed in all the compounds. The studies reported here as well as other experimental for great number of compounds support the conclusion that almost all vibrational relaxation processes in liquids can be described using a single relaxation time. It also seems that all vibrational degrees of freedom of the molecule take part in this vibrational process. It seems that differences in transition probabilities between molecules studied could be caused by additional attraction between of molecules having a significant dipole moments.
ABSTRACT After a short description of the Ultrasonic Polar Scan Technique for characterizing comp... more ABSTRACT After a short description of the Ultrasonic Polar Scan Technique for characterizing composites, the paper describes and experimental method, based on the combination of Schlieren photography and a wide bounded ultrasonic beam of frequency 10 MHz, used to detect the fiber direction in composites. Experiments are described on unidirectional and fabric fiber reinforced composites. This method is not based on Lamb wave phenomena, which can be complicated for interpretation by NDT engineers, but rather is based on relatively simple principles, i.e. inhomogeneity and symmetry of composites.© (2005) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.