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pro vyhledávání: '"Lisy, Vladimir"'
Autor:
Lisy, Vladimir, Tothova, Jana
Publikováno v:
Diffusion fundamentals. 9(6):1-10
A multi-pulsed free-induction NMR experiment is described theoretically for spins diffusing within a cylindrical capillary. The characteristic time for the particles to move on a distance of the capillary diameter is smaller or comparable to the time
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https://ul.qucosa.de/id/qucosa%3A14144
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Autor:
Lisy, Vladimir, Tothova, Jana
Recently, Lad, Patel, and Pratap (LP&P) [Phys. Rev. E 105, 064107 (2022)] revisited a microscopic theory of molecular motion in liquids, proposed by Glass and Rice [Phys. Rev. 176, 239 (1968)]. Coming from this theory, LP&P derived a new equation of
Externí odkaz:
http://arxiv.org/abs/2310.18746
Autor:
Tothova, Jana, Lisy, Vladimir
Publikováno v:
Diffusion fundamentals. 15(5):1-10
A number of random processes in various fields of science is described by phenomenological equations of motion containing stochastic forces, the best known example being the Langevin equation (LE) for the Brownian motion (BM) of particles. Long ago V
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https://ul.qucosa.de/id/qucosa%3A13841
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Autor:
Tothova, Jana, Lisy, Vladimir
Publikováno v:
Diffusion fundamentals. 17(3):1-10
A generalization of the Rouse model of the dynamics of polymers in solution is proposed. The motion of long polymer chains is considered to be due to exponentially correlated random forces driving the polymer segments, which is a more realistic model
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https://ul.qucosa.de/id/qucosa%3A13727
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Autor:
Tothova, Jana, Lisy, Vladimir
Publikováno v:
Diffusion fundamentals. 19(2):1-9
Traditional bead-spring models of the polymer dynamics are based on the Einstein theory of the Brownian motion (BM), valid only at the times much larger than the particle´s relaxation time. The reason is in neglecting the inertial and memory effects
Externí odkaz:
https://ul.qucosa.de/id/qucosa%3A13704
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Autor:
Lisy, Vladimir, Tothova, Jana
The Brownian motion of a particle immersed in a medium of charged particles is considered when the system is placed in magnetic or electric fields. Coming from the Zwanzig-Caldeira-Legget particle-bath model, we modify it so that not only the charged
Externí odkaz:
http://arxiv.org/abs/2009.11091
Autor:
Tothova, Jana, Lisy, Vladimir
Publikováno v:
In: Horizons in World Physics, Editor A. Reimer. Vol. 296 (2018) Chapter 2, p. 59-104, ISBN 978-1-53614-125-2
In the present work, by using the method of accumulation of phase shifts in the rotating frame, the attenuation function S(t) of the NMR signal from an ensemble of spin-bearing particles in a magnetic-field gradient is expressed through the particle
Externí odkaz:
http://arxiv.org/abs/1809.09498
Autor:
Lisy, Vladimir, Tothova, Jana
Publikováno v:
Journal of Molecular Liquids 234 (2017) 182-186
Nuclear magnetic resonance (NMR) is a widely used nondestructive method to study random motion of spin-bearing particles in different systems. In the long-time limit the theoretical description of the NMR experiments is well developed and allows prop
Externí odkaz:
http://arxiv.org/abs/1803.01554
Autor:
Lisy, Vladimir, Tothova, Jana
Publikováno v:
Physica A 494 (2018) 200-208
The methods of Nuclear Magnetic Resonance belong to the best developed and often used tools for studying random motion of particles in different systems, including soft biological tissues. In the long-time limit the current mathematical description o
Externí odkaz:
http://arxiv.org/abs/1803.01544
Autor:
Tóthová, Jana, Lisý, Vladimír
Publikováno v:
In Journal of Molecular Liquids 15 January 2022 346