Now showing items 80-99 of 100

    • Replacing Natural Gas by Biogas — Determining the Bacterial Contamination of Biogas by PCR 

      Author: Čermáková , Jiřina; Mrázek , Jakub; Fliegerová , Kateřina; Tenkrát , Daniel
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)
      A promising way of using biogas is to upgrade it to natural gas, which is referred to as Substitute Natural Gas (SNG) or biomethane. Biomethane, or biogas, is produced by biological processes of harnessing the ability of ...
    • Research and development of CO2 Capture and Storage Technologies in Fossil Fuel Power Plants 

      Author: Pilař , Lukáš; Hrdlička , Jan
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)
      This paper presents the results of a research project on the suitability of post-combustion CCS technology in the Czech Republic. It describes the ammonia CO2 separation method and its advantages and disadvantages. The ...
    • Research Trends for PID Controllers 

      Author: Visioli , Antonio
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)
      This paper analyses the most significant issues that have been recently been addressed by researchers in the field of Proportional-Integral-Derivative (PID) controllers. In particular, the most recent techniques proposed ...
    • Resistance Spot Welding of dissimilar Steels 

      Author: Kolařík , Ladislav; Sahul , Miroslav; Kolaříková , Marie; Sahul , Martin; Turňa , Milan; Felix , Michal
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)
      This paper presents an analysis of the properties of resistance spot welds between low carbon steel and austenitic CrNi stainless steel. The thickness of the welded dissimilar materials was 2 mm. A DeltaSpot welding gun ...
    • S5 1803+78 Revisited 

      Author: Nesci , R.; Maselli , A.; Montagni , F.; Sclavi , S.
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)
      We report on our optical monitoring of the BL Lac object S5 1803+78 from 1996 to 2011. The source showed no clear periodicity, but a time scale of about 1 300 days between major flares is possibly present. No systematic ...
    • Simulation of a Matrix Converter Fed Drive With Sliding Mode Control 

      Author: Bauer , Jan
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)
      Induction machines are among the most widely used electrical-to-mechanical converters in electric drives. Their advantageous robustness and simplicity goes hand-in-hand with complicated control. A converter with a suitable ...
    • Simulation of Free Airfoil Vibrations in Incompressible Viscous Flow — Comparison of FEM and FVM 

      Author: Sváček , Petr; Horáček , Jaromír; Honzátko , Radek; Kozel , Karel
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)
      This paper deals with a numerical solution of the interaction of two-dimensional (2-D) incompressible viscous flow and a vibrating profile NACA 0012 with large amplitudes. The laminar flow is described by the Navier-Stokes ...
    • Strontium As a Structure Modifier for Nonbinary Al–Si Alloy 

      Author: Stunová , Barbora Bryksí
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)
      This paper presents a study of the influence on the structure of AlSi10Mg alloy when 400 ppm of strontium is added. Not only changes in the morphology of eutectic silicon, but in particular changes in the morphology of the ...
    • Structural Variability of 3C 111 on Parsec Scales 

      Author: Grossberger , C.; Kadler , M.; Wilms , J.; Müller , C.; Beuchert , T.; Ros , E.; Ojha , R.; Aller , M.; Aller , H.; Angelakis , E.; Fuhrmann , L.; Nestoras , I.; Schmidt , R.; Zensus , J. A.; Krichbaum , T. P.; Ungerechts , H.; Sievers , A.; Riquelme , D.
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)
      We discuss the parsec-scale structural variability of the extragalactic jet 3C111 related to a major radio flux density outburst in 2007. The data analyzed were taken within the scope of the MOJAVE, UMRAO, and F-GAMMA ...
    • Synthesis of Mechanisms by Methods of Nonlinear Dynamics 

      Author: Valášek , Michael; Šika , Zbynek
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)
      This paper deals with a new method for parametric kinematic synthesis of mechanisms. The traditional synthesis procedure based on collocation, correction and optimization suffers from the local minima of objective functions, ...
    • Teaching Management at Technical Universities Business Reality in the Academic Environment 

      Author: Baroch , V.; Duchoň , B.; Faifrová , V.; Říha , Z.
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)
      Students of technical universities often do not understand why their studies should include learning management skills (in addition to the study of economics). However, not only the experience of graduates but also the ...
    • The Asymptotic Properties of Turbulent Solutions to the NavierStokes Equations 

      Author: Skalák , Zdenek
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)
      In this paper we study the large time behavior of solutions to the Navier-Stokes equations. We present a brief survey of results concerning energy decay, and discuss a related phenomenon of the large time energy concentration ...
    • The Effect of Temperature on the Gasification Process 

      Author: Baláš , Marek; Lisý , Martin; Štelcl , Ota
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)
      Gasification is a technology that uses fuel to produce power and heat. This technology is also suitable for biomass conversion. Biomass is a renewable energy source that is being developed to diversify the energy mix, so ...
    • The Electrification of Tramways in Ostrava in 1900–1901 

      Author: Závodná , Michaela
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)
      This paper focuses on the electrification of tramways in Ostrava in 1900-1901. As the administrative, economic and cultural centre of an evolving industrial agglomeration, Ostrava had specific transportation requirements. ...
    • The Intriguing Nature of the Cataclysmic Variable SS Cygni 

      Author: Giovannelli , F.; Sabau-Graziati , L.
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)
      The classification of SS Cyg as a dwarf nova (DN), a subclass of the non–magnetic (NM) cataclysmic variable (CV) has been considered by most of the community as well established because of a paper appeared in Nature (Bath ...
    • The Optical Transient Search in the Bamberg Southern Sky Survey: Preliminary Results 

      Author: Hudec , R.; Kopel , F.; Krapp , P.; Heber , U.; Cayé , W.
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)
      A large fraction of gamma-ray bursts temporarily emit optical light, i.e. optical afterglows and optical transients. So far, optical transients have only been detected after related gamma-ray satellite detection. However, ...
    • The Simulation of the Influence of Water Remnants on a Hot Rolled Plate after Cooling 

      Author: Zahradník , Radek
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)
      In situations when a sheet metal plate of large dimensions is rolled, water remnants from cooling can be observed on the upper side of the plate. This paper focuses on deformations of a hot rolled sheet metal plate that ...
    • Transonic Flow of Wet Steam — Numerical Simulation 

      Author: Halama , Jan
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)
      The paper presents a numerical simulation of the transonic flow of steam with a non-equilibrium phase change. The flow of steam is approximated by a mixture model complemented by transport equations for moments. Proper ...
    • Ultra Low Dispersion Spectroscopy with Gaia and Astronomical Slitless Surveys 

      Author: Hudec , R.; Hudec , L.; Klíma , M.
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)
      The ultra-low dispersion spectroscopy to be applied in the ESA Gaia space observatory and the ground-based objective-prism plate surveys represent a similar type of astrophysical data. Although the dispersion in plate ...
    • Use of Grasses and Mixtures of Grasses for Energy Purposes 

      Author: Andert , David; Frydrych , Jan; Gerndtová , Ilona
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)
      As levels of agricultural productivity increase, there is also an increase in land area not utilized for food production. This area can be used for growing energy crops, including grasses. When land is set aside for grassing, ...