National Repository of Grey Literature 43 records found  1 - 10nextend  jump to record: Search took 0.00 seconds. 
Cristannus de Prachaticz’s Treatises on the Astrolabe
Hadrava, Petr ; Hadravová, Alena
The authors' computer methods of collation and statistical treatment of variant readings are summarized and illustrated on the example of the critical edition of the treatises on Composition and Use of the Astrolabe written by the 15th-century Czech scholar Cristannus de Prachaticz.\n
Odhady přesnosti modelů tíhového pole pomocí nezávislé družicové diferenciální altimetrie
Klokočník, Jaroslav ; Wagner, C. A. ; Kostelecký, J.
A continuous progress in the Earth gravity field modeling requires some refinements in their accuracy assessments. The method based on latitude lumped coefficients, which makes use of satellite crossover altimetry data (independent of the tested gravity models) has been developed in years 1992 - 2000. It was applied on various gravity models, recently on EIGEN IS, which already includes data from the CHAMP mission. For the first time, EIGEN IS model has degree-dependent calibration factors and we tested and confirm that their choice is a right one.
Orbity hvězd v gravitačním poli hmotného toru v blízkosti centra galaxie
Šubr, L. ; Karas, Vladimír
We further examine orbits of satellite stars in the gravitational field of a dark supermassive compact body, which is surrounded by a self-gravitating accretion disc or a massive molecular torus.
Sestupující orbity v okolí rotující černé díry
Pecháček, T. ; Karas, Vladimír
We consider orbits of a test body near a rotating black hole. The orbits are perturbed by two effects which drive them away from purely geodesic motion.
Obecné souvislosti nelineární resonance 3:2 v kontextu QPO
Horák, Jiří
In the resonant model, quasi periodic oscillations (QPOs) are supposed to be consequence of a nonlinear resonance between modes of oscillations within innermost parts of an accretion disk.
Model pro XSPEC ke zkoumání spekter z černoděrových zdrojů
Dovčiak, Michal ; Karas, Vladimír ; Martocchia, A. ; Matt, G. ; Yaqoob, T.
We report on a new general relativistic computational model enhancing, in various respects, the capability of presently available tools for fitting spectra of X-ray sources.
Proměnnost akreujících zdrojů při vysokém časovém rozlišení
Bursa, Michal
We are carrying out a project to study rapid variability of radiation originating from accreting compact objects. Our goal is to examine fluctuations of the radiation flux occuring on the light-crossing time scales, taking into account effects of strong gravitational field.

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