Zobrazeno 1 - 10
of 909
pro vyhledávání: '"P. Kopáček"'
The width of a resonance in a nearly integrable system, i.e. in a non-integrable system where chaotic motion is still not prominent, can tell us how a perturbation parameter is driving the system away from integrability. Although the tool that we are
Externí odkaz:
http://arxiv.org/abs/2412.19683
Autor:
Kopáček, Ondřej, Karas, Vladimír
Publikováno v:
2024 ApJ 966 226
According to General Relativity, astrophysical black holes are described by a small number of parameters. Apart from the mass of the black hole (M), among the most interesting characteristics is the spin (a), which determines the degree of rotation,
Externí odkaz:
http://arxiv.org/abs/2404.04501
Autor:
Ondrej Vargovčík, Zuzana Čiamporová-Zaťovičová, Pavel Beracko, Jiří Kopáček, Patrik Macko, Kornélia Tuhrinová, Fedor Čiampor
Publikováno v:
Scientific Reports, Vol 14, Iss 1, Pp 1-14 (2024)
Abstract Assessments of biodiversity and ecosystem status can benefit from DNA metabarcoding as a means to streamline sample processing and specimen identification. Moreover, processing the fixation medium instead of the precious material introduces
Externí odkaz:
https://doaj.org/article/5b21d7070b444d8ea7c90459aacb11f7
Akademický článek
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Autor:
Melina Garcia Guizzo, Helena Frantová, Stephen Lu, Tereza Kozelková, Kristýna Číhalová, Filip Dyčka, Alena Hrbatová, Miray Tonk-Rügen, Jan Perner, José M. Ribeiro, Andrea C. Fogaça, Ludek Zurek, Petr Kopáček
Publikováno v:
Frontiers in Cellular and Infection Microbiology, Vol 14 (2024)
Ticks are obligate hematophagous arthropods that transmit a wide range of pathogens to humans as well as wild and domestic animals. They also harbor a non-pathogenic microbiota, although our previous study has shown that the diverse bacterial microbi
Externí odkaz:
https://doaj.org/article/cdb7106973db4d2598ea60d1ba11edd7
Publikováno v:
Physical Review D, 107, 064005 (2022)
We investigate resonance crossings of a charged body moving around a Kerr black hole immersed in an external homogeneous magnetic field. This system can serve as an electromagnetic analogue of a weakly non-integrable extreme mass ratio inspiral (EMRI
Externí odkaz:
http://arxiv.org/abs/2206.10302
Autor:
Kopacek, Ondrej, Karas, Vladimir
Combined influence of rotation of a black hole and ambient magnetic fields creates conditions for powerful astrophysical processes of accretion and outflow of matter which are observed in many systems across the range of masses; from stellar-mass bla
Externí odkaz:
http://arxiv.org/abs/2111.00493
Publikováno v:
Journal of Water and Climate Change, Vol 15, Iss 1, Pp 127-138 (2024)
The water temperature of many lakes has recently risen as a result of climate change. We evaluated trends in the cloudiness, solar radiation, wind, air and water temperatures, ice cover, thermocline depth, transparency, and composition of two Bohemia
Externí odkaz:
https://doaj.org/article/2b9f2257aab54d0a938d3edd6d06bdf5
Publikováno v:
Scientific Reports, Vol 13, Iss 1, Pp 1-11 (2023)
Abstract Scree deposits in alpine catchments contain undeveloped till soils that are “hidden” between and under stones. These scree areas have no vegetation except for sparse lichen patches on stone surfaces, but the soils exhibit biological acti
Externí odkaz:
https://doaj.org/article/70a4c7d4241b41be93638bfc28f2f810
Autor:
Karas, Vladimir, Kopacek, Ondrej
Publikováno v:
Astronomische Nachrichten, Volume 342, Issue 1-2, pp. 357-363 (2021)
We study the effects of large scale magnetic fields on the dynamics of charged particles near a rotating black hole. We consider a scenario in which the initially neutral particles on geodesic orbits in the equatorial plane become ionized, and hence
Externí odkaz:
http://arxiv.org/abs/2012.15490