Prohlížení Acta Polytechnica. 2014, vol. 54 dle názvu

Zobrazují se záznamy 11-30 z 73

    • BEYOND THE STANDARD MODEL OF THE DISC–LINE SPECTRAL PROFILES FROM BLACK HOLE ACCRETION DISCS 

      Autor: Sochora , Vjaceslav; Karas , Vladimír; Svoboda , Jirí; Dovciak , Michal
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)
      The strong gravitational field of a black hole has distinct effects on the observed profile of a spectral line from an accretion disc near a black hole. The observed profile of the spectral line is broadened and skewed by ...

    • CAN ONE REALLY STUDY CHAOS ANALYTICALLY? 

      Autor: Lee Howard, M.
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)
      One generally thinks that chaos can be studied only numerically by aid of the computer. It is however suggested by the theorem of Sharkovskii and Li and Yorke that in Id continuous maps analytical studies are possible. How ...

    • COMPARATIVE MEASUREMENTS OF HEAD ANGULAR MOVEMENTS USING A CAMERA SYSTEM AND A GYROSCOPE SYSTEM 

      Autor: Socha , Vladimir; Kutilek , Patrik; Cakrt , Ondrej; Cerny , Rudolf
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)
      Assessments of body-segment angular movements are very important in the rehabilitation process. Head angular movements are measured and analyzed for use in studies of stability and posture. However, there is no methodology ...

    • COMPUTATIONAL AERODYNAMIC OPTIMIZATION OF LOW-SPEED WING 

      Autor: Lahuta , Martin; Pátek , Zdeněk; Szöllös , András
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)
      An optimization method consisting of genetic and evolution optimization algorithm and a solver using nonlinear aerodynamics was applied on design of low-speed wing. Geometric parameterization of wing uses standard geometric ...

    • CURRENT WAYS TO HARVEST ENERGY USING A COMPUTER MOUSE 

      Autor: Horvat , Frantisek; Cekan , Michal; Soltes , Lukas; Biath , Peter; Hucko , Branislav; Jedinak , Igor
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)
      This paper deals with the idea of an energy harvesting (EH) system that uses the mechanical energy from finger presses on the buttons of a computer mouse by means of a piezomaterial (PVF2). The piezomaterial is placed in ...

    • DEPOSITION CARBON NANOSTRUCTURES BY SURFATRON GENERATED DISCHARGE 

      Autor: Davydova , Marina; Smid , Jiri; Hubicka , Zdenek; Kromka , Alexander
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)
      Carbon nanostructures were deposited by surface wave discharge using various Ar/CH4/ CO2 gas mixture ratios. The morphology was controlled by adjusting of gas concentration and was investigated by scanning electron microscopy ...

    • DESIGN THEORY FOR THE PRESSING CHAMBER IN THE SOLID BIOFUEL PRODUCTION PROCESS 

      Autor: Kováčová , Monika; Matúš , Miloš; Križan , Peter; Beniak , Juraj
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)
      The quality of a high-grade solid biofuel depends on many factors, which can be divided into three main groups - material, technological and structural. The main focus of this paper is on observing the influence of structural ...

    • DIRAC AND HAMILTON 

      Autor: Leach G. L., P.
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)
      Dirac devised his theory of Quantum Mechanics and recognised that his operators resembled the canonical coordinates of Hamiltonian Mechanics. This gave the latter a new lease of life. We look at what happens to Dirac’s ...

    • DISTINGUISHING BETWEEN SPOT AND TORUS MODELS OF HIGH-FREQUENCY QUASIPERIODIC OSCILLATIONS 

      Autor: Karas , Vladimír; Bakala , Pavel; Török , Gabriel; Dovčiak , Michal; Wildner , Martin; Wzientek , Dalibor; Šrámková , Eva; Abramowicz , Marek; Goluchová , Kateřina; Mazur P., Grzegorz; Vincent H., Frédéric
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)
      In the context of high-frequency quasi-periodic oscillation (HF QPOs) we further explore the appearance of an observable signal generated by hot spots moving along quasi-elliptic trajectories close to the innermost stable ...

    • EFFECTIVE FRACTURE ENERGY OF ULTRA-HIGH-PERFORMANCE FIBRE-REINFORCED CONCRETE UNDER INCREASED STRAIN RATES 

      Autor: Sovják , Radoslav; Rašínová , Jana; Máca , Petr
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)
      The main objective of this paper is to contribute to the development of ultra-high performance fibre reinforced concrete (UHPFRC) with respect to its effective fracture energy. Effective fracture energy was investigated ...

    • EFFECTIVE USE OF ROTARY FURNACE SHELL HEAT 

      Autor: Lisuch , Julius; Dorcak , Dusan; Spisak , Jan
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)
      Significant proportion of the total energy expenditure for the heat treatment of raw materials are heat losses through the shell of rotary furnace. Currently, the waste heat is not used in any way and escapes into the ...

    • EIGENVALUE COLLISION FOR PT-SYMMETRIC WAVEGUIDE 

      Autor: Borisov , Denis
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)
      We consider a model of a planar PT-symmetric waveguide and study the phenomenon of the eigenvalue collision under perturbation of the boundary conditions. This phenomenon was discovered numerically in previous works. The ...

    • ELIMED: MEDICAL APPLICATION AT ELI-BEAMLINES. STATUS OF THE COLLABORATION AND FIRST RESULTS 

      Autor: Schillaci , Francesco; Cirrone A. P., Giuseppe; Korn , George; Maggiore , Mario; Margarone , Daniele; Calabretta , Luciano; Cavallaro , Salvatore; Cuttone , Giacomo; Gammino , Santo; Krasa , Josef; Prokupek , Jan; Velyhan , Andriy; Renis , Marcella; Romano , Francesco; Tomasello , Barbara; Torrisi , Lorenzo; Cutroneo , Mariapompea; Tramontana , Antonella
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)
      ELI-Beamlines is one of the four pillars of the ELI (Extreme Light Infrastructure) pan-European project. It will be an ultrahigh-intensity, high repetition-rate, femtosecond laser facility whose main goal is to generate ...

    • EXACT RENORMALIZATION GROUP FOR POINT INTERACTIONS 

      Autor: Turgut Teoman, Osman Teoman Turgut; Eröncel , Cem
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)
      Renormalization is one of the deepest ideas in physics, yet its exact implementation in any interesting problem is usually very hard. In the present work, following the approach by Glazek and Maslowski in the flat space, ...

    • EXCEPTIONAL POINTS IN OPEN AND PT-SYMMETRIC SYSTEMS 

      Autor: Eleuch , Hichem; Rotter , Ingrid
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)
      Exceptional points (EPs) determine the dynamics of open quantum systems and cause also PT symmetry breaking in PT symmetric systems. From a mathematical point of view, this is caused by the fact that the phases of the ...

    • EXPERIMENTAL VERIFICATION OF THE STRUCTURAL AND TECHNOLOGICAL PARAMETERS OF THE PKS 

      Autor: Onderová , Iveta; Kolláth , Ludovít; Ploskuňáková , Lucia
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)
      This paper presents the theoretical design for experimental verification of the structural and technological parameters of the Parallel Kinematic Structure. The experimental equipment was developed at the Faculty of ...

    • 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 ...