Prohlížení Acta Polytechnica. 2013, vol. 53 dle názvu
Zobrazují se záznamy 38-57 z 169
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EFFECT OF SLIP VELOCITY ON THE PERFORMANCE OF A SHORT BEARING LUBRICATED WITH A MAGNETIC FLUID
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)This paper aims at analyzing the effect of velocity slip on the behavior of a magnetic fluid based infinitely short hydrodynamic slider bearing. Solving the Reynolds’ equation, the expression for pressure distribution is ... -
Emittance Characterization of Ion Beams Provided by Laser Plasma
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)Laser ion sources offer the possibility to obtain ion beams useful for particle accelerators. Nanosecond pulsed lasers at intensities of the order of 108 W/cm2, interacting with solid matter in a vacuum, produce plasma of ... -
Emmy Noether and Linear Evolution Equations
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)Noether’s Theorem relates the Action Integral of a Lagrangian with symmetries which leave it invariant and the first integrals consequent upon the variational principle and the existence of the symmetries. These each have ... -
EMPLOYMENT, PRODUCTION AND CONSUMPTION WITH RANDOM UPDATE: NON-EQUILIBRIUM STATIONARY STATE EQUATIONS
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)In this work, we investigate the Model of Employment, Production and Consumption, as introduced in a series of papers by I. Wright [1–3] from the perspective of statistical physics, and we focus on the presence of equilibrium. ... -
EROSITA: AGN SCIENCE, BACKGROUND DETERMINATION, AND OPTICAL FOLLOW-UP SPECTROSCOPY
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)More than 20 years after the highly impacting ROSAT all-sky survey in the soft X-ray spectral range, we are close to the next major X-ray all/sky surveys with eROSITA. eROSITA will be the primary instrument on-board the ... -
Estimation of Amount of Scattered Neutrons at Devices PFZ and GIT-12 by MCNP Simulations
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)Our work is dedicated to pinch effect occurring during current discharge in deuterium plasma, and our results are connected with two devices – plasma focus PFZ, situated in the Faculty of Electrical Engineering, CTU, Prague, ... -
EXAMPLES OF QUANTUM HOLONOMY WITH TOPOLOGY CHANGES
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)We study a family of closed quantum graphs described by one singular vertex of order n = 4. By suitable choice of the parameters specifying the singular vertex, we can construct a closed path in the parameter space that ... -
EXTREMAL VECTORS FOR VERMA TYPE REPRESENTATION OF B2
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)Starting from the Verma modules of the algebra B2 we explicitly construct factor representations of the algebra B2 which are connected with the unitary representation of the group SO(3, 2). We find a full set of extremal ... -
FACTOR AND PALINDROMIC COMPLEXITY OF THUE-MORSE’S AVATARS
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)Two infinite words that are connected with some significant univoque numbers are studied. It is shown that their factor and palindromic complexities almost coincide with the factor and palindromic complexities of the famous ... -
Finding Hidden Treasures: Investigations in US Astronomical Plate Archives
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)We report here on an ongoing investigation of US astronomical plate archives and tests of the suitability of transportable scanning devices for in situ digitization of archival astronomical plates. -
FOREWORD: THREE QUARTERS A CENTURY
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)Foreword -
Fractal Dimension Estimation in Diagnosing Alzheimer’s Disease
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)Estimated entropies from a limited data set are always biased. Consequently, it is not a trivial task to calculate the entropy in real tasks. In this paper, we used a generalized definition of entropy to evaluate the ... -
FROM GALACTIC TO EXTRAGALACTIC JETS: A REVIEW
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)An analysis of the data that have recently become available from observing campaigns, including VLA, VLBA, and satellite instruments, shows some remarkable similarities and significant differences in the data from some ... -
GALACTIC AND EXTRAGALACTIC SUPERNOVA REMNANTS AS SITES OF PARTICLE ACCELERATION
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)Supernova remnants, owing to their strong shock waves, are likely sources of Galactic cosmic rays. Studies of supernova remnants in X-rays and gamma rays provide us with new insights into the acceleration of particles to ... -
Generalized Continuity Equation for Quasi-Hermitian Hamiltonians
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)The continuity relation is generalized to quasi-Hermitian one-dimensional Hamiltonians. As an application we show that the reflection and transmission coefficients computed with the generalized current obey the conventional ... -
gln+1 ALGEBRA OF MATRIX DIFFERENTIAL OPERATORS AND MATRIX QUASI-EXACTLY-SOLVABLE PROBLEMS
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)The generators of the algebra gln+1 in the form of differential operators of the first order acting on Rn with matrix coefficients are explicitly written. The algebraic Hamiltonians for matrix generalization of 3−body ... -
GRB INVESTIGATIONS BY ESA GAIA AND LOFT
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)The possibility of studying GRBs with the ESA Gaia and LOFT missions is briefly addressed. The ESA Gaia satellite to be launched in November 2013 will focus on high precision astrometry of stars and all objects down to ... -
Growth and Physical Structure of Amorphous Boron Carbide Deposited by Magnetron Sputtering on a Silicon Substrate with a Titanium Interlayer
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)Multilayer amorphous boron carbide coatings were produced by radiofrequency magnetron sputtering on silicon substrates. To improve the adhesion, titanium interlayers with different thickness were interposed between the ... -
High-Speed Monitoring of Dust Particles in ITER ELMs Simulation Experiments with QSPA Kh-50
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)Dust generation under powerful plasma stream impacts has been studied in ITER ELM simulation experiments with QSPA Kh-50 plasma accelerator. Repetitive plasma exposures of tungsten have been performed by 0.25 ms plasma ... -
HIGHLIGHTS FROM THE LHC
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)The Large Hadron Collider (LHC) and the two multi-purpose detectors, ATLAS and CMS, have been operated successfully at record centre-of-mass energies of 7 ÷ 8TeV. This paper presents the main physics results from proton–proton ...