Seminář Ústavu teoretické fyziky

jaro 2010

Proběhlé semináře:

2. března 2010
Some problems of probability theory as a class of ill-posed problems
prof. Lev Klebanov, DrSc.
(seminář v angličtině)

Prezentace k přednášce.

9. března 2010
Potkávání matematiky s fyzikou v jejích dějinách
Prof. RNDr. M. Mareš, DrSc.
16. března 2010
Hamiltonovská formulace Finslerovy/Riemannovy geometrie a teorie šíření vln
RNDr. L. Klimeš, DrSc.
23. března 2010
Spatial decay for the Helmholtz equation with a potential
Dr. John Stalker
School of Mathematics, Trinity College Dublin
(seminář v angličtině)

The Helmholtz equation, also known as the reduced wave equation, has, in the case of complex eigenvalues, solutions which decay exponentially at infinity. The was proved by Kato fifty years ago. Potetials are allowed, provided they decay faster than the Coulomb potential. Kato's result is suboptimal in three ways: (1) his decay rate is not the best possible, (2) his estimates are in L2 rather than in sup norm, and (3) he is missing an interesting derivative estimate, closely related to the Sommerfeld radiation condition. I will show how to fix all of these problems.

30. března 2010
Quantum walks: theory and implamantions
Aurel Gabris, PhD
Katedra fyziky, FJFI
(seminář v angličtině)
6. dubna 2010
Seminář se nekoná
13. dubna 2010
Fyzika ve Fermilabu
Karel Soustružník, Ph.D.
20. dubna 2010
Biomechanický model tvorby hlasu člověka
ing. Jaromír Horáček, DrSc
Ústav termomechaniky AV ČR

27. dubna 2010
Quodsi de terra in coelo nemo potest videre, quanto minus de inferno. A jestliže o Zemi v nebi nikdo viděti nemůže, tím méně o pekle.
RNDr. Jakub Velímský, Ph.D.
Katedra geofyziky MFF UK
(seminář v angličtině)

One of the traditional geophysical tools that allow us to study the Earth's interior is the electromagnetic induction. Time-varying electric currents in the Earth's ionosphere and magnetosphere induce secondary currents in the crust and mantle. Observations of the geomagnetic field at the surface and, recently, also from the space, can be used to reconstruct the radial and even lateral distribution of electrical conductivity which is closely related to the temperature, chemical, and mineralogical composition of the Earth. Mathematically, this technique leads to a typical non-linear inversion, where uniqueness of the solution is not guaranteed.

4. května 2010
Teoretická biofyzika čichových neuronů
RNDr. Martin Zápotocký, Ph.D.
Fyziologický ústav AV ČR

11. května 2010
seminář začíná v 10:00
Classical analog of quantum Schwarzschild and Reissner-Nordstrom black holes. Solving the "Mystery of log 3"
Prof. Victor Berezin
Institute for Nuclear Research, Russian Academy of Sciences
(seminář v angličtině)

11. května 2010
seminář začíná v 11:00
The Genesis Projects: Laboratory Studies in Molecular Astrophysics from the First Star to the Beginnings of Organic Chemistry
Daniel Wolf Savin
Coloumbia Astrophysics Laboratory, NY, USA
(seminář v angličtině)

Interstellar chemistry plays an important role in the evolution of the universe from the dark ages to the formation of life. I will discuss two particularly important links in this chain of chemical reactions. The first is the formation of H2 in the early universe. Uncertainties in this process limit our ability to reliably model the formation of the first stars. The other link we study is the start of the cosmic pathway to life which begins in interstellar gas clouds where atomic carbon is "fixed" into molecules, thereby initiating the synthesis of the complex organic molecules that are eventually sequestered on planets. These reactions initiate not only the formation of organic molecules in the cosmos, but also provide some of the first threads knitting together atoms and molecules into solid material. Such processes are critical for the eventual formation of planets and may determine a major component of the organic chemistry that is present on their young surfaces. I will briefly review these motivations for our research and explain how we reproduce the relevant reactions through laboratory experiments.

18. května 2010
Topological structures and gravitational theories
Dr. Andres Anabalon
Albert Einstein Institute, Potsdam-Golm
(seminář v angličtině)
15. června 2010
Mimořádný seminář v úterý 15.6. ve 14:00, 10. patro budovy v Tróji
An attempt to interpret the anisotropy spectrum of the relict radiation on a microscopic basis
RNDr. Ladislav Červinka, DrSc.

Abstract. The angular power spectrum (anisotropy spectrum) of the Cosmic Microwave Background (relict radiation) shows incredible similarity with X-ray or neutron scattering measured on non-crystalline materials. Until now this spectrum has emerged as an important tool helping to test cosmological models and theories of cosmic structure formation. In this contribution we undertake an attempt to interpret the anisotropy spectrum of relict radiation using an analogous approach as is generally used when a structure of a disordered material is studied using X-ray (or neutron) scattering. We expect that various approximations used during this study may help to find conditions under which relict radiation scattering can be exploited to find similar information as in the case of the analysis of X-ray scattering on disordered materials. As a consequence we hope that this analysis may reveal interesting information (distances between objects and-or particles, density of the matter) on the ordering of the prime-matter which is scattering the relict radiation.

Další ročníky:

© 8. června 2010; Eva Kotalíková <>
© 2. října 2022; vygenerováno pomocí aplikace seminar, verze 2.04 (2003-09-02); správce <>