Prohlížení Acta Polytechnica dle názvu

Zobrazují se záznamy 296-315 z 880

    • EVALUATION OF RAILWAY BALLAST LAYER CONSOLIDATION AFTER MAINTENANCE WORKS 

      Autor: Sysyn , Mykola; Nabochenko , Olga; Kovalchuk , Vitalii; Gerber , Ulf
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2019)
      The results of the study of the ballast layer consolidation after the work of ballast-tamping machines of different types are given in the article. The existing methods of determining the degree of consolidation of the ...

    • EVALUATION OF REFLECTANCE FOR BUILDING MATERIALS CLASSIFICATION WITH TERRESTRIAL LASER SCANNER RADIATION 

      Autor: Costantino, Domenica; Pepe, Massimiliano; Angelini, Maria Giuseppa
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2021)
      The main purpose of this work is the evaluation of the potential of Terrestrial Laser Scanning (TLS) technology to perform a reflectance analysis of scanned objects. A laser beam, having a coherent beam in the field of ...

    • Evaluation of residual strength of polymeric yarns subjected to previous impact loads 

      Autor: Hahn, Gabriela; Monteiro da Fonseca Thomé da Silva, Antônio Henrique; Tempel Stumpf, Felipe; Marcos Guilherme, Carlos Eduardo
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)
      The discovery of oil fields in deep and ultra-deep waters provided an opportunity to evaluate the use of  synthetic ropes, complementarily or alternatively to traditional steel-based mooring lines in offshore units, mainly ...

    • EVALUATION OF SENSOR SIGNAL PROCESSING METHODS IN TERMS OF INFORMATION THEORY 

      Autor: Flegner , Patrik; Kačur , Ján
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2018)
      The paper deals with the examination of basic methods of evaluation of sensor signals in terms of the information content of the given method and the used technical means. In this respect, methods based on classical analog ...

    • EVALUATION OF THE APPLICATION OF A THERMAL INSULATION SYSTEM: IN-SITU COMPARISSON OF SEASONAL AND DAILY CLIMATIC FLUCTUATIONS 

      Autor: Fořt , Jan; Beran , Pavel; Konvalinka , Petr; Pavlík , Zbyšek; Černý , Robert
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2017)
      The current outdated state of many institutional and administrative buildings in the EU region poses a significant burden from the energy sustainability point of view. According to the contemporary EU requirements on the ...

    • EVALUATION OF THE SURFACE SETTLEMENT ABOVE THE PRAGUE METRO LINE A EXTENSION CONSTRUCTED BY TWO SHIELDS 

      Autor: Hilar , Matous; Tuan The, Nhu
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2016)
      The new section of the Prague metro V.A is located in the west part of Prague, between stations Dejvická and Motol Hospital. The new metro section is 6.2km long and has four new stations. Majority of the two running tunnels ...

    • 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, ...

    • Exact solutions for time-dependent complex symmetric potential well 

      Autor: Khantoul, Boubakeur; Bounames, Abdelhafid
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2023)
      Using the pseudo-invariant operator method, we investigate the model of a particle with a time-dependent mass in a complex time-dependent symmetric potential well V (x, t) = if (t) |x|. The problem is exactly solvable and ...

    • EXAMPLES OF QUANTUM HOLONOMY WITH TOPOLOGY CHANGES 

      Autor: Cheon , Taksu; Tanaka , Atushi; Turek , Ondřej
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      We study a family of closed quantum graphs described by one singular vertex of order n = 4. By suitable choice of the parameters specifying the singular vertex, we can construct a closed path in the parameter space that ...

    • 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 and simulation study of CO2 breakthrough curves in a fixed-bed adsorption process 

      Autor: Nedoma, Marek; Staf, Marek; Hrdlička, Jan
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)
      This paper focuses on the laboratory experiments of low-temperature adsorption of CO2 at elevated pressure and on the validation of our mathematical model with the data obtained. The numerical approach uses fitting of ...

    • EXPERIMENTAL CHARACTERIZATION OF A MAGNETOHYDRODYNAMIC POWER GENERATOR UNDER DC ARC PLASMA 

      Autor: Ayeleso Oluwaseun, Ayokunle; Kahn T. E., Mohamed
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2018)
      The generation of electric power through the conventional systems (thermal and hydroelectric) is no longer sufficient to meet the increasing industrial and commercial usage. Therefore, an alternative energy conversion ...

    • EXPERIMENTAL CHARACTERIZATION OF AN OVERDENSE PLASMA IN A COMPACT ION SOURCE 

      Autor: Castro , Giuseppe; Mascali , David; Romano , Francesco Paolo; Altana , Carmen; Caliri , Claudia; Celona , Luigi; Di Giugno , Rossella; Gambino , Nadia; Lanaia , Davide; Miracoli , Rosalba; Musumarra , Agatino; Neri , Lorenzo; Torrisi , Giuseppe; Gammino , Santo
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2015)
      Electron Cyclotron Resonance Ion Sources (ECRIS) are compact plasma-based machines able to feed particle accelerators with high intensity beams of multi-charged ions. ECRIS plasmas are density-limited, since they are ...

    • EXPERIMENTAL DETERMINATION OF TEMPERATURES IN SPARK GENERATED BUBBLES OSCILLATING IN WATER 

      Autor: Vokurka , Karel
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2017)
      The surface temperatures of the plasma core in the final stages of the first contraction phase of spark-generated bubbles oscillating under ordinary laboratory conditions in a large expanse of water are determined ...

    • EXPERIMENTAL EVALUATION OF WEDM MACHINED SURFACE WAVINESS 

      Autor: Mouralova , Katerina; Kovar , Jiri; Houska , Pavel
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2016)
      Wire Electrical Discharge Machining (WEDM) an unconventional machining technology which has become indispensable in many industries. The typical morphology of a surface machined using the electrical discharge technology ...

    • Experimental investigation of flow characteristics and performance parameters of a podded aft engine air intake 

      Autor: Amiri, Human; Küçük, Umut Can; Kuşcu, Yiğit Fırat
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2023)
      This experimental study investigates the flow characteristics and performance parameters of a podded intake in aft-engine configuration at the aerodynamic interface plane (AIP), which is a typical configuration of a generic ...

    • Experimental Investigation of Radial Gas Dispersion Coefficients in a Fluidized Bed 

      Autor: Štefanica , Jiří; Hrdlička , Jan
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)
      In a fluidized bed boiler, the combustion efficiency, the NOX formation rate, flue gas desulphurization and fluidized bed heat transfer are all ruled by the gas distribution. In this investigation, the tracer gas method ...

    • EXPERIMENTAL INVESTIGATION OF THE POZZOLANIC POTENTIALS OF MILLET AND RICE HUSK ASH AS MINERAL ADDITIVE IN SELF-COMPACTING CONCRETE 

      Autor: Wasiu , John; Oluwatosin , Fashina Ayoola
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2020)
      Self-compacting concrete (SCC) is a new concept of concrete mix which flows in a formwork and consolidates itself without the need for compaction. Effectively compacting concrete can be very difficult especially in areas ...

    • EXPERIMENTAL INVESTIGATION ON CHROMIUM(VI) REMOVAL FROM AQUEOUS SOLUTION USING ACTIVATED CARBON RESORCINOL FORMALDEHYDE XEROGELS 

      Autor: Oyedoh A., Eghe; Ekwonu C., Michael
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2016)
      The adsorption of chromium(VI) metal ion in aqueous solutions by activated carbon resorcinol formaldehyde xerogels (ACRF) was investigated. The results showed that pore structure, surface area and the adsorbent surface ...

    • EXPERIMENTAL LEVELLING AT THE INTERFACE OF OPTICAL ENVIRONMENTS 

      Autor: Sirůčková , Hana
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2016)
      The article discusses the problems of refraction and its impact on levelling at the interface of optical environments. It describes the influence of a vertical refraction and shows the results of investigating the effect ...