Prohlížení Acta Polytechnica. 2014, vol. 54 dle názvu

Zobrazují se záznamy 27-46 z 73

    • FACT — LONGTERM MONITORING OF BRIGHT TeV BLAZARS 

      Autor: Meier , Katja; Biland , A.; Bretz , T.; Buss , J.; Dorner , D.; Einecke , S.; Eisenacher , D.; Hildebrand , D.; Knoetig L., M.; Krähenbühl , T.; Lustermann , W.; Mannheim , K.; Neise , D.; Overkemping , A.-K.; Paravac , A.; Pauss , F.; Rhode , W.; Ribordy , M.; Steinbring , T.; Temme , F.; Thaele , J.; Vogler , P.; Walter , R.; Weitzel , Q.; Zänglein , M.
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)
      The First G-APD Cherenkov Telescope (FACT), located on the Canary Island of La Palma, has been taking data since October 2011. FACT has been optimized for longterm monitoring of bright TeV blazars, to study their variability ...

    • FACT — STATUS AND FIRST RESULTS 

      Autor: Dorner , Daniela; Biland , A.; Bretz , T.; Buss , J.; Einecke , S.; Eisenacher , D.; Hildebrand , D.; Knoetig L., M.; Krähenbühl , T.; Lustermann , W.; Mannheim , K.; Meier , K.; Neise , D.; Overkemping , A.-K.; Paravac , A.; Pauss , F.; Rhode , W.; Ribordy , M.; Steinbring , T.; Temme , F.; Thaele , J.; Vogler , P.; Walter , R.; Weitzel , Q.; Zänglein , M.
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)
      FACT is the first imaging Cherenkov telescope based on a camera using solid state photosensors (Geigermode Avalanche Photodiodes G-APD aka SiPM). Since October 2011, it has been taking data regularly. Apart from commissioning ...

    • FRACTIONAL CALCULUS AND LAMBERT FUNCTION I. LIOUVILLE–WEYL FRACTIONAL INTEGRAL 

      Autor: Vojta , Vladimír
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)
      The interconnection between the Liouville–Weyl fractional integral and the Lambert function is studied. The class of modified Abel equations of the first kind is solved. A new integral formula for the Gamma function and ...

    • HYDRATION OF PLASMA-TREATED ALUMOSILICATE BINDERS 

      Autor: Šmilauer , Vít; Babchenko , Oleg; Potocký , Štepán; Kromka , Alexander
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)
      Plasma treatment offers several applications in material science. In this research, the potential of plasma treatment is explored on the hydration of hydrophilic CNT-enriched cement and hydrophilic fly ash. The evolution ...

    • IMPACT OF STRAIN RATE ON MICROALLOYED STEEL SHEET BREAKING 

      Autor: Mihaliková , Mária; Német , Miroslav; Vojtko , Marek
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)
      Strain rate is a significant external factor and its influence on material behavior in forming process is a function of its internal structure. The contribution is analysis of the impact of loading rate from 1.6 x 10-4 ...

    • IMPROVING SPECIFIC POWER CONSUMPTION FOR MECHANICAL MIXING OF THE FEEDSTOCK IN A BIOGAS FERMENTER BY MECHANICAL DISINTEGRATION OF LIGNOCELLULOSE BIOMASS 

      Autor: Kratky , Lukas; Jirout , Tomáš
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)
      Lignocellulosic biomass particles in biogas fermenter batch either sediment towards vessel bottom or rise towards batch surface, where they float and form a compact thick scum. These processes have primarily the negative ...

    • IN-CYLINDER MASS FLOW ESTIMATION AND MANIFOLD PRESSURE DYNAMICS FOR STATE PREDICTION IN SI ENGINES 

      Autor: Sławomir , Wojnar; Rohal-Ilkiv , Boris; Šimončic , Peter; Honek , Marek; Jozef , Csambál
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)
      The aim of this paper is to present a simple model of the intake manifold dynamics of a spark ignition (SI) engine and its possible application for estimation and control purposes. We focus on pressure dynamics, which may ...

    • INFLUENCE OF SUBSTRATE THICKNESS ON DIFFUSE COPLANAR SURFACE BARRIER DISCHARGE PROPERTIES 

      Autor: Čech , Jan; Zemánek , Miroslav; Sťahel , Pavel; Dvořáková , Hana; Černák , Mirko
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)
      In presented work the influence of dielectric barrier thickness on the parameters of Diffuse Coplanar Surface Barrier Discharge was investigated. The discharge was operated at atmospheric pressure laboratory air. The ...

    • INFRARED PHOTOLUMINESCENCE SPECTRA OF PBS NANOPARTICLES PREPARED BY LANGMUIR–BLODGETT AND LASER ABLATION METHODS 

      Autor: Remes , Zdeněk; Novak , Tomas; Stuchlik , Jiri; Stuchlikova , The-ha; Dřínek , Vladislav; Fajgar , Radek; Zhuravlev , Konstantin
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)
      We optimized the optical setup originally designed for the photoluminescence measurements in the spectral range 400‒1100 nm. New design extends the spectral range into the near infrared region 900‒1700 nm and allows the ...

    • INHIBITION OF CANDIDA ALBICANS GROWTH ON SURFACES TREATED BY DIELECTRIC BARRIER DISCHARGE WITH VARIOUS BARRIERS 

      Autor: Sláma , Jan; Kríha , Vítezslav
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)
      Discharges generating low temperature plasma at atmospheric pressure have the potential to treat surfaces biologically contaminated by organic matter in a non-destructive manner. We have been studying ways of inhibiting ...

    • INJECTION MOLDING AND STRUCTURAL ANALYSIS IN METAL TO PLASTIC CONVERSION OF BOLTED FLANGE JOINT BY CAE 

      Autor: Blaško, Marian; Tittel, Viktor; Náplava, Antonín; Ondruška, Michal
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)
      Many metal parts in various applications are being replaced by plastic parts. There are several reasons for that depending on actual application - minimize part cost, enhance corrosion resistance, integrating more components ...

    • LABORATORY EQUIPMENT FOR AUTOTHERMAL REFORMING OF ORGANIC MATTER IN SUPERCRITICAL WATER 

      Autor: Gajdoš , Matúš
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)
      The ability of water to dissolve organic substances is very limited. However, its ability to dissolve them changes if pressure and temperature values reach the so-called critical point (p = 22.06MPa, T = 373.95 °C). Fluid ...

    • LAPLACE-RUNGE-LENZ VECTOR IN QUANTUM MECHANICS IN NONCOMMUTATIVE SPACE 

      Autor: Prešnajder , Peter; Gáliková , Veronika; Kováčik , Samuel
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)
      The object under scrutiny is the dynamical symmetry connected with conservation of the Laplace-Runge-Lenz vector (LRL) in the hydrogen atom problem solved by means of noncommutative quantum mechanics (NCQM). The considered ...

    • LOCAL VELOCITY PROFILES MEASURED BY PIV IN AN VESSEL AGITATED BY RUSHTON TURBINE 

      Autor: Šulc , Radek; Pešava , Vít; Ditl , Pavel
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)
      The hydrodynamics and flow field were measured in an agitated vessel using 2-D Time Resolved Particle Image Velocimetry (2-D TR PIV). The experiments were carried out in a fully baffled cylindrical flat bottom vessel 300 ...

    • LOW-MASS BINARY X-RAY SOURCES: MONITORING WITH VARIOUS SATELLITES 

      Autor: Šimon , Vojtěch
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)
      We show the importance of observing low-mass binary (LMXB) X-ray sources with the X-ray monitors onboard satellites. This enables us to study the physical processes governing the longterm activity of LMXBs. They are excellent ...

    • NOx PREDICTION FOR FBC BOILERS USING EMPIRICAL MODELS 

      Autor: Štefanica , Jiří; Hrdlička , Jan
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)
      Reliable prediction of NOx emissions can provide useful information for boiler design and fuel selection. Recently used kinetic prediction models for FBC boilers are overly complex and require large computing capacity. ...

    • OBLIQUE MAGNETIC FIELDS AND THE ROLE OF FRAME DRAGGING NEAR ROTATING BLACK HOLE 

      Autor: Karas , Vladimír; Kopáček , Ondřej; Kunneriath , Devaky
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)
      Magnetic null points can develop near the ergosphere boundary of a rotating black hole by the combined effects of strong gravitational field and the frame-dragging mechanism. The induced electric component does not vanish ...

    • ON OBSERVATIONAL PHENOMENA RELATED TO KERR SUPERSPINARS 

      Autor: Stuchlik , Zdenek; Schee , Jan
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)
      We investigate possible signatures of a Kerr naked singularity (superspinar) in various observational phenomena. It has been shown that Kerr naked singularities (superspinars) have to be efficiently converted to a black ...

    • ON THE REAL MATRIX REPRESENTATION OF PT-SYMMETRIC OPERATORS 

      Autor: Fernández M., Francisco
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)
      We discuss the construction of real matrix representations of PT-symmetric operators. We show the limitation of a general recipe presented some time ago for non-Hermitian Hamiltonians with antiunitary symmetry and propose ...

    • ON TWO WAYS TO LOOK FOR MUTUALLY UNBIASED BASES 

      Autor: Kibler R., Maurice
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)
      Two equivalent ways of looking for mutually unbiased bases are discussed in this note. The passage from the search for d+1 mutually unbiased bases in Cd to the search for d(d+1) vectors in Cd2 satisfying constraint relations ...