Browsing Acta Polytechnica by Title

Now showing items 472-491 of 880

    • MAGNETRON SPUTTERING WITH HOT SOLID TARGET: THERMAL PROCESSES AND EROSION 

      Author: Borduleva Olegovna, Alena; Bleykher Alekseevna, Galina; Sidelev Vladimirovich, Dmitrii; Krivobokov Pavlovich, Valeriy
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2016)
      This work focuses on erosion and thermal processes taking place on the surface of the titanium target in magnetron sputtering. The study was carried out using magnetron sputtering systems (MSS) with different thermal ...

    • Marine diesel engines operating cycle simulation for diagnostics issues 

      Author: Minchev, Dmytro S.; Varbanets, Roman A.; Alexandrovskaya, Nadiya I.; Pisintsaly, Ludmila V.
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2021)
      The ongoing monitoring of marine diesel engines helps to detect the deviations of its parameters early and prevent major failures. But the experimental diagnostics data are generally limited, so frequently, it isn’t possible ...

    • Massive Parallelization of Multibody System Simulation 

      Author: Valášek , Michael; Mráz , Ladislav
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)
      This paper deals with the decrease in CPU time necessary for simulating multibody systems by massive parallelization. The direct dynamics of multibody systems has to be solved by a system of linear algebraic equations. ...

    • Materials for Fusion Applications 

      Author: Matějíček , Jiří
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      An overview of materials foreseen for use or already used in fusion devices is given. The operating conditions, material requirements and characteristics of candidate materials in several specific application segments are ...

    • MATHEMATICAL ALGORITHM OF FUZZY LOGIC CONTROLLER FOR MULTILEVEL INVERTER CREATING VERTICAL DIVIDED VOLTAGE 

      Author: Can , Erol
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2019)
      A 9-level inverter with a boost converter has been controlled with a fuzzy logic controller and a PID controller for regulating output voltage applications on resistive (R) and inductive (L), capacitance (C). The mathematical ...

    • MAXIMAL SUBSETS OF PAIRWISE SUMMABLE ELEMENTS IN GENERALIZED EFFECT ALGEBRAS 

      Author: Riečanová , Zdenka; Janda , Jiří
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      We show that in any generalized effect algebra (G;⊕, 0) a maximal pairwise summable subset is a sub-generalized effect algebra of (G;⊕, 0), called a summability block. If G is lattice ordered, then every summability ...

    • Maxwell-Chern-Simons-Higgs theory 

      Author: Kulshreshtha, Usha; Kulshreshtha, Daya Shankar; Sihagb, Bheemraj
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)
      We consider the three dimensional electrodynamics described by a complex scalar field coupled with the U(1) gauge field in the presence of a Maxwell term, a Chern-Simons term and the Higgs potential. The Chern-Simons term ...

    • Measurement of a quantum particle position at two distant locations: a model 

      Author: Dittrich, Jaroslav
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)
      A simplified one-dimensional model of measurement of the position of a quantum particle by two distant detectors is considered. Detectors are modelled by quantum particles bounded in potential wells with just two bound ...

    • Measurement of O2 in the Combustion Chamber of Apulverized Coal Boiler 

      Author: Janeba , Břetislav; Kolovratník , Michal; Bartoš , Ondřej
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)
      Operational measurements of the O2 concentration in the combustion chamber of a pulverized coal boiler are not yet common practice. Operators are generally satisfied with measuring the O2 concentration in the second pass ...

    • Measurement of solid particle emissions from oxy-fuel combustion of biomass in fluidized bed 

      Author: Červený, Ondřej; Vybíral, Pavel; Hemerka, Jiří; Mareš, Luďek
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)
      The presented work summarizes the results of the measurement of solid particle emissions from an experimental 30 kW combustion unit. This unit has been used for the research of oxy-fuel combustion of biomass in a fluidized ...

    • MEASUREMENTS ON THE VT 400 AIR TURBINE 

      Author: Klimko , Marek; Okresa , Daniel
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2016)
      This paper presents a basic description of measurements on the experimental air turbine located in the laboratories of the Department of Power System Engineering (KKE). The research on this turbine focuses on the flow in ...

    • MEASURING SUPERMASSIVE BLACK HOLE SPINS IN AGN 

      Author: Brenneman, Laura
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      Measuring the spins of supermassive black holes (SMBHs) in active galactic nuclei (AGN) can inform us about the relative role of gas accretion vs. mergers in recent epochs of the life of the host galaxy and its AGN. Recent ...

    • Mechanical and physical properties of cement mixtures for 3D processing 

      Author: Litoš, Jiří; Šána, Vladimír; Uhlík, Adam; Kolář, Karel; Nguyen, Markéta
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2023)
      In this paper, information about cementitious composite materials for further 3D processing is discussed and supplemented. Many of the research in this area focuses primarily on cement composites suitable for 3D printing. ...

    • MECHANICAL DISINTEGRATION OF WHEAT STRAW BY ROLLER-PLATE GRIND SYSTEM WITH SHARP-EDGED SEGMENTS 

      Author: Kratky , Lukas; Jirout , Tomáš
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2015)
      Colloid mills and extruders are widely used for disintegrating wet fibrous biomass. However, their main disadvantages are a high energy requirement in the range of hundreds or thousands of kWh per ton of material, and the ...

    • MECHANICAL PROPERTIES OF PVA NANOFIBER TEXTILES WITH INCORPORATED NANODIAMONDS, COPPER AND SILVER IONS 

      Author: Indrová , Kateřina; Prošek , Zdeněk; Topič , Jaroslav; Ryparová , Pavla; Nežerka , Václav; Tesárek , Pavel
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2015)
      The unique properties of nanotextiles based on poly(vinyl-alcohol) (PVA) manufactured using electrospinning method have been known and exploited for many years. Recently, the enrichment of nanofiber textiles with nanoparticles, ...

    • MECHANICAL PROPERTIES OF RAMMED EARTH WITH RESPECT TO CLAY MIXTURE COMPOSITION 

      Author: Plaček Otcovská, Tereza; Mužíková, Barbora; Padevět, Pavel
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2019)
      Unfired earth is a traditional building material, but it is less used than other building materials, such as concrete or steel. But the use of unfired earth is experiencing a renaissance. ammed earth is a type of unfired ...

    • Metallurgical Joining of Magnesium Alloys by the FSW Process 

      Author: Kupec , Tomáš; Hlavačová , Ivana; Turňa , Milan
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)
      This paper deals with welding AZ 31Mg alloy by FSW (Friction Stir Welding) technology. Welds were fabricated with new equipment supplied from China for VUZ-PI Bratislava (Welding Research Institute — Industrial Institute). ...

    • METALS IN THE ICM: WITNESSES OF CLUSTER FORMATION AND EVOLUTION 

      Author: Lovisari, Lorenzo; Laganá, Tatiana F.; Borm, Katharina; Schellenberger, Gerrit; Reiprich, Thomas H.
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      The baryonic composition of galaxy clusters and groups is dominated by a hot, X-ray emitting Intra-Cluster Medium (ICM). The mean metallicity of the ICM has been found to be roughly 0.3 ÷ 0.5 times the solar value, therefore ...

    • Micromechanical Analysis of Cement Paste with Carbon Nanotubes 

      Author: Šmilauer , Vít; Hlaváček , Petr; Padevět , Pavel
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)
      Carbon nanotubes (CNT) are an attractive reinforcement material for several composites, due to their inherently high strength and high modulus of elasticity. There are controversial results for cement paste with admixed ...

    • MICROSTRUCTURAL CHARACTERISTICS, MECHANICAL AND WEAR BEHAVIOUR OF ALUMINIUM-ALLOYED DUCTILE IRONS SUBJECTED TO TWO AUSTEMPERING PROCESSES 

      Author: Adebayo , Abdullahi Olawale; Oyetunji , Akinlabi; Alaneme , Kenneth Kenayo
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2020)
      The effect of aluminium addition and austempering processes on the microstructures, mechanical and wear properties of rotary melting furnace processed ductile irons was investigated. Ductile irons containing 1−4 wt.% Al ...