Prohlížení Acta Polytechnica. 2013, vol. 53 dle názvu
Zobrazují se záznamy 110-129 z 169
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QUANTIFICATION OF RESPIRATORY SINUS ARRHYTHMIA WITH HIGH-FRAMERATE ELECTRICAL IMPEDANCE TOMOGRAPHY
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)Respiratory Sinus Arrhythmia, the variation in the heart rate synchronized with the breathing cycle, forms an interconnection between cardiac-related and respiratory-related signals. It can be used by itself for diagnostic ... -
RADIOACTIVE UHECR ASTRONOMY: CORRELATING GAMMA ANISOTROPY AND NEUTRINO PEV EVENTS
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)UHECR (Ultra High Energy Cosmic Rays) were expected to be protons, to fly straight and to suffer of a GZK (opacity on CMB radiation) cut off. AUGER did suggest on 2007 that such early UHECR anisotropy was compatible with ... -
RECENT DEVELOPMENTS IN ULTRA-HIGH ENERGY NEUTRINO ASTRONOMY
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)We outline the current situation in ultrahigh energy (UHE) cosmic ray physics, pointing out the remaining problems, in particular the puzzle concerning the origin of the primary radiation and the role of neutrino astronomy ... -
RESONANCES ON HEDGEHOG MANIFOLDS
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)We discuss resonances for a nonrelativistic and spinless quantum particle confined to a two- or three-dimensional Riemannian manifold to which a finite number of semiinfinite leads is attached. Resolvent and scattering ... -
RESULTS FROM LHCF EXPERIMENT
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)The LHCf experiment has taken data in 2009 and 2010 p–p collisions at LHC at √s = 0.9TeV and √s = 7TeV. In this paper the most up-to-date results on the inclusive photon spectra and the π0 spectra measured by LHCf are ... -
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 ... -
ROBUST CONTROL OF END-TIDAL CO₂ USING THE H∞ LOOP-SHAPING APPROACH
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)Mechanically ventilated patients require appropriate settings of respiratory control variables to maintain acceptable gas exchange. To control the carbon dioxide (CO₂ ) level effectively and automatically, system identification ... -
RX-J0852−4622: THE NEAREST HISTORICAL SUPERNOVA REMNANT – AGAIN
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)RX-J0852−4622, a supernova remnant, is demonstrated to be closer than 500 pc, based on the measurements of the angular radius, the angular expansion rate and the TeV g-ray flux. This is a new method of limiting the distance ... -
SEARCH FOR DARK MATTER WITH GAMMA-RAYS: A REVIEW
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)Successfully launched in June 2008, the Fermi Gamma-ray Space Telescope, formerly named GLAST, has been observing the high-energy gamma-ray sky with unprecedented sensitivity inthe 20MeV ÷ 300 GeV energy range and electrons ... -
SEARCH FOR GRAVITATIONAL WAVES FROM SUPERNOVAE AND LONG GRBS
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)We report on evidence for black hole spindown in the light curves of the BATSE catalogue of 1491 long GRBs by application of matched filtering. This observation points to a strong interaction of the black hole with surrounding ... -
Spectral Analysis of Schrödinger Operators with Unusual Semiclassical Behavior
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)In this paper we discuss several examples of Schrödinger operators describing a particle confined to a region with thin cusp-shaped ‘channels’, given either by a potential or by a Dirichlet boundary; we focus on cases when ... -
Spectral Singularities do not Correspond to Bound States in the Continuum
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)We show that, contrary to a claim made in arXiv:1011.0645, the von Neumann-Winger bound states that lie in the continuum of the scattering states are fundamentally different from Naimark’s spectral singularities. -
Stationary and Dynamical Solutions of the Gross-Pitaevskii Equation for a Bose-Einstein Condensate in a PT symmetric Double Well
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)We investigate the Gross-Pitaevskii equation for a Bose-Einstein condensate in a PT symmetric double-well potential by means of the time-dependent variational principle and numerically exact solutions. A one-dimensional ... -
Status and Perspectives of the Mini-MegaTORTORA Wide-field Monitoring System with High Temporal Resolution
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)Here we briefly summarize our long-term experience of constructing and operating wide-field monitoring cameras with sub-second temporal resolution to look for optical components of GRBs, fast-moving satellites and meteors. ... -
STATUS OF THE CUORE EXPERIMENT
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)The CUORE (Cryogenic Underground Observatory for Rare Events) experiment will search for neutrinoless double beta decay of 130Te, a rare nuclear process that, if observed, would demonstrate the Majorana nature of the ... -
Steel Fibre Reinforced Concrete for Tunnel Lining – Verification by Extensive Laboratory Testing and Numerical Modelling
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)The use of precast steel fibre reinforced concrete (SFRC) for tunnel segments is a relatively new application of this material. It was first applied in Italy in the 1980s. However, it did not begin to be widely applied ... -
Stimulated Raman Backscattering in Plasma — a Promising Tool for the Generation of Ultra-High Power Laser Beams
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)In the last fifteen years stimulated Raman backscattering (SRBS) in plasma has been intensively elaborated as a promising tool on the way towards high intense lasers. There are several advantages of this technique in ... -
Study of Silicon Photomultipliers for the GRIPS Calorimeter Module
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)GRIPS is a proposed gamma-ray (200 keV to 80 MeV) astronomy mission, which incorporates a pair-creation and Compton scattering telescope, along with X-ray and infrared telescopes. It will carry out a sensitive all-sky ... -
STUDY OF THE TIME DEPENDENCE OF RADIOACTIVITY
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)The activity of a 137Cs source was measured using a germanium detector installed deep underground in the Gran Sasso Laboratory. In total about 5100 energy spectra, one hour measuring time each, were collected and used to ... -
SUPERNOVA 1987A: CELEBRATING A SILVER JUBILEE
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)The story of the SN 1987A explosion is briefly reviewed. Although this supernova was somewhat peculiar, the study of SN 1987A has clarified quite a number of important aspects of the nature and the properties of supernovae, ...