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Marine diesel engines operating cycle simulation for diagnostics issues
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2021)
The ongoing monitoring of marine diesel engines helps to detect the deviations of its parameters early and prevent major failures. But the experimental diagnostics data are generally limited, so frequently, it isn’t possible ...
Self tunning filter for three levels four legs shunt active power filter with fuzzy logic controller
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2021)
The low harmonic distortion and reduced switching losses are the advantages of using the multilevel inverter. For this purpose, the three-level inverter is used in this paper as a three-phase four-leg shunt active power ...
Post-impact mechanical characterization of HMPE yarns
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2021)
The present work evaluates the mechanical behaviour of High Modulus Polyethylene (HMPE) yarns after being impacted by sudden axial loads. The influence of loading conditions on the structural integrity of yarns is assessed ...
Antipalindromic numbers
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2021)
Everybody has certainly heard about palindromes: words that stay the same when read backwards. For instance, kayak, radar, or rotor. Mathematicians are interested in palindromic numbers: positive integers whose expansion ...
METALS IN THE ICM: WITNESSES OF CLUSTER FORMATION AND EVOLUTION
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
The baryonic composition of galaxy clusters and groups is dominated by a hot, X-ray emitting Intra-Cluster Medium (ICM). The mean metallicity of the ICM has been found to be roughly 0.3 ÷ 0.5 times the solar value, therefore ...
DARK ENERGY AND KEY PHYSICAL PARAMETERS OF CLUSTERS OF GALAXIES
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
We study physics of clusters of galaxies embedded in the cosmic dark energy background. The equilibrium and stability of polytropic spheres with equation of state of the matter P = Kpγ, γ = 1 + 1/n, in presence ...
THE 2H(α, γ)6LI REACTION AT LUNA AND BIG BANG NUCLEOSYNTHETIS
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
The 2H(α, γ)6Li reaction is the leading process for the production of 6Li in standard Big Bang Nucleosynthesis. Recent observations of lithium abundance in metal-poor halo stars suggest that there might be a 6Li plateau, ...
THE FIRST STARS
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
Pop III stars are the key to the character of primeval galaxies, the first heavy elements, the onset of cosmological reionization, and the seeds of supermassive black holes. Unfortunately, in spite of their increasing ...
THE SZ EFFECT IN THE PLANCK ERA: ASTROPHYSICAL AND COSMOLOGICAL IMPACT
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
The Sunyaev–Zel’dovich effect (SZE) is a relevant probe for cosmology and particle astrophysics. The Planck Era marks a definite step forward in the use of this probe for astrophysics and cosmology. Astrophysical applications ...
RESULTS FROM THE XENON100 EXPERIMENT
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
The XENON program consists in operating and developing double-phase time projection chambers using liquid xenon as the target material. It aims to directly detect dark matter in the form of WIMPs via their elastic scattering ...