Prohlížení Acta Polytechnica dle názvu

Zobrazují se záznamy 767-786 z 880

    • THE ASTRO-H MISSION 

      Autor: Maeda, Yoshitomo; Takahashi, Tadayuki; Mitsuda, Kazuhisa; Kelley, Richard
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      A review of the Astro-H mission is presented here on behalf of the Astro-H collaboration. The joint JAXA/NASA ASTRO-H mission is the sixth in a series of highly successful X-ray missions initiated by the Institute of Space ...

    • The Asymptotic Properties of Turbulent Solutions to the Navier-Stokes Equations 

      Autor: 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 AUGER ENGINEERING RADIO ARRAY 

      Autor: Weidenhaupt, Klaus
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      The Auger Engineering Radio Array currently measures MHz radio emission from extensive air showers induced by high energy cosmic rays with 24 self-triggered radio detector stations. Its unique site, embedded into the ...

    • THE CHARACTERISTICS OF Al-Si COATING ON STEEL 22MnB5 DEPENDING ON THE HEAT TREATMENT 

      Autor: Kolaříková, Marie; Chotěborský, Rostislav; Hromasová, Monika; Linda, Miloslav
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2019)
      The coating on the 22MnB5 steel is intended to protect it against oxidation during the forming process. This steel is hot-pressed. A preheating before the pressing and subsequent hardening in the tool affects the properties ...

    • THE CHARACTERIZATION OF ANODIC OXIDE LAYERS ON SELECTED BIO-COMPATIBLE TITANIUM ALLOYS 

      Autor: Krčil , Jan; Mára , Vladimír; Krum , Stanislav; Sobotová , Jana
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2018)
      Oxide layers on titanium alloy surfaces have an influence on bio-compatibility and corrosion resistance. In order to improve them, properties of oxide layers are examined. The oxide layer can be prepared by different methods ...

    • The classification of eye diseases from fundus images based on CNN and pretrained models 

      Autor: Benbakreti, Samir; Benbakreti, Soumia; Ozkaya, Umut
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2024)
      Visual impairment affects more than a billion people worldwide due to insufficient care or inadequate vision screening. Computer-aided diagnosis using deep neural networks is a promising approach, it can analyse and process ...

    • THE CONDENSATION OF WATER VAPOUR IN A MIXTURE CONTAINING A HIGH CONCENTRATION OF NON-CONDENSABLE GAS IN A VERTICAL TUBE 

      Autor: Havlík , Jan; Dlouhý , Tomáš; Krempaský , Jakub
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2020)
      This paper deals with the condensation of water vapour possessing a content of noncondensable gas in vertical tubes. The condensation of pure steam on a vertical surface is introduced by the Nusselt condensation model. ...

    • The Construction of the Fast Resistive Bolometer for a SXR Measurement on the GIT-12 Facility 

      Autor: Cikhardt , Jakub; Klír , Daniel; Kubeš , Pavel; Kravárik , Josef; Rezác , Karel; Šíla , Ondrej; Shishlov , Alexander V.; Labetsky , Alexey Yu.
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      A lot of kinds of instruments are used for the SXR measurement at pulsed power facilities, but most of them are difficult to calibrate absolutely. For the determination of the energy of SXR radiated by the discharge on ...

    • THE COUPLED-CLUSTER APPROACH TO QUANTUM MANY-BODY PROBLEM IN A THREE-HILBERT-SPACE REINTERPRETATION 

      Autor: Bishop F., Raymond; Znojil , Miloslav
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)
      The quantum many-body bound-state problem in its computationally successful coupled cluster method (CCM) representation is reconsidered. In conventional practice one factorizes the groundstate wave functions |Ψ) = eS |Φ) ...

    • The Czech Contribution to Future Large X-Ray Astronomy Telescopes: Recent Progress 

      Autor: Hudec , René; Pína , Ladislav; Inneman , Adolf; Černá , Daniela; Maršíková , Veronika; Tichý , Vladimír; Míka , Martin
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      We briefly review the recent status of the Czech contribution to future space X-ray astronomy missions with emphasis on the development of new technologies and test samples of X-ray mirrors with precise surfaces based on ...

    • THE DEVELOPMENT OF A NEW ADSORPTION-DESORPTION DEVICE 

      Autor: Gabrišová , Ľudmila; Peciar , Peter; Macho , Oliver; Juriga , Martin; Galbavá , Paulína; Nižnanská , Žofia; Kubinec , Róbert; Valent , Ivan; Peciar , Marián
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2020)
      The aim of this work was to construct a new adsorption-desorption device based on the principle of separation of volatile organic compounds, e.g., ethanol. As an adsorbent, it is possible to use granulated activated carbon ...

    • THE DISCOVERY OF THE CHANDRASEKHAR MASS AND THE CHANDRASEKHAR-EDDINGTON CONTROVERSY 

      Autor: Shaviv, Giora
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      The so called Chandrasekhar limiting mass is a a quantum mechanical relativistic effect. The discovery and establishment of the concept involved a major controversy between the young Chandrasekhar and the hilarious Eddington. ...

    • THE EFFECT OF ADDING HYDROGEN ON THE PERFORMANCE AND THE CYCLIC VARIABILITY OF A SPARK IGNITION ENGINE POWERED BY NATURAL GAS 

      Autor: Chríbik , Andrej; Polóni , Marián; Lach , Ján; Ragan , Branislav
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)
      This paper deals with the influence of blending hydrogen (from 0 to 50% vol.) on the parameters and the cyclic variability of a Lombardini LGW702 combustion engine powered by natural gas. The experimental measurements were ...

    • The effect of ambient temperature on the delay time of perimeter protection 

      Autor: Ďurica, Jakub; Sovjak, Radoslav; Boroš, Martin; Kuffa, Radoslav
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2023)
      Perimeter security defines the private space from the public space and also serves as the first barrier between the intruder and the protected interest. Delay time is one of the input parameters used in a quantitative ...

    • THE EFFECT OF DIFFERENT FORMS OF OXYGEN ON PROPERTIES OF BETA TITANIUM ALLOYS 

      Autor: Málek , Jaroslav; Hnilica , František; Bartáková , Sonia; Míka , Patrik; Veselý , Jaroslav
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2018)
      The beta-titanium alloys are widely used in many applications (medicine, aerospace industry etc.) due to their superior properties, such as corrosion resistance, biocompatibility and high strength to weight ratio. One of ...

    • The Effect of Kaolin Concentration on Flock Growth Kinetics in an Agitated Tank 

      Autor: Šulc , Radek; Svačina , Ondřej
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      This paper reports on an investigation of the effect of initial solid particle concentrationon flock growth and flock shape characterized by the fractal dimension Df2. The experiments werecarried out in a baffled tank ...

    • THE EFFECT OF SOIL GRAIN SIZE ON THE DEFORMATION PROPERTIES OF REINFORCED GEOCELL LAYERS 

      Autor: Luňáčková , Barbara; Mohyla , Marek; Pinka , Miroslav
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2019)
      The effect of backfill material grading on the behaviour of geocell reinforced layers was experimentally investigated in this study. A series of loading tests were performed on a model with geocell reinforced and unreinforced ...

    • The Effect of Strain Rate on the Mechanical Properties of Automotive Steel Sheets 

      Autor: Német , Miroslav; Mihaliková , Mária
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      The automotive industry is currently seeking detailed information about various types of materials and their behavior under dynamic loading. Dynamic tensile testing of sheet steels is growing in importance. The experimental ...

    • The Effect of Temperature on the Gasification Process 

      Autor: 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 EFFECT OF THE FILLING RATIO ON THE OPERATING CHARACTERISTICS OF AN INDIRECT DRUM DRYER 

      Autor: Havlík , Jan; Dlouhý , Tomáš; Sabatini , Michel
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2020)
      This article investigates the effect of the filling ratio of the indirect rotary dryers on their operating characteristics. For moist biomass drying before combustion, the use of indirect drum dryers heated by a low pressure ...