Prohlížení Časopisy dle názvu

Zobrazují se záznamy 994-1013 z 1843

    • Measurement and evaluation of cement paste porosity by electrochemical impedance spectroscopy 

      Autor: Chalupová, Jana; Němeček, Jiří; Hybášek, Vojtěch; Pommer, Vojtěch; Němeček, Jiří
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2023)
      Porosity is an important part of cement paste microstructure, which significantly influences the mechanical properties (especially durability and strength) of cement-based materials. Electrochemical impedance spectroscopy ...

    • MEASUREMENT METHODS OF INTERNAL STRESS IN CONTINUOUS WELDED RAIL 

      Autor: Vnenk, Petr; Culek, Bohumil
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2017)
      This paper deals with the problem of internal rail stress estimation. It is based on a detailed research of contemporary situation in the field, presents basic outlines of the problem and sums up the major research areas ...

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

      Autor: 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 NEUTRON SPATIAL DISTRIBUTION OF THE BNCT EPITHERMAL BEAM AT THE REACTOR LVR-15 

      Autor: Rabochová, Michaela; Vinš, Miroslav; Šoltés, Jaroslav; Michalcová, Božena
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2016)
      In this study, a measurements of neutron field using a special positioning device with a 6Li + Si detector and image plate is described. The measurements were provided for Boron Neutron Capture Therapy (BNCT) channel of ...

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

      Autor: 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 

      Autor: 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 

      Autor: 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 circularity from buildings to neighbourhoods 

      Autor: Gomes , Vanessa; Valdivia, Sara; Pulgrossi, Lizzie; Gomes da Silva, Maristela
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)
      The circular economy (CE) aims to eliminate the concept of pollution and waste generation, maintain the integrity of the product over several use cycles, and focus on closing material and energy loops. Circularity metrics ...

    • MEASURING SUPERMASSIVE BLACK HOLE SPINS IN AGN 

      Autor: 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 CHEMICAL ACTIVATION OF BLAST FURNACE SLAG AND ITS INFLUENCE ON THE MECHANICAL PROPERTIES OF THE RESULTING CEMENT PASTE 

      Autor: Horych, Jan; Tesárek, Pavel; Prošek, Zdeněk
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2021)
      The usage of waste materials is a very important global topic. The large amount of waste everywhere in the world needs to be processed or disposed. Landfilling is not an option anymore, because of European legislation and ...

    • Mechanical and durability performance of cementitious matrices with low cement and different additions 

      Autor: Soldado, Eliana; Antunes, Ana; Costa, Hugo; Carmo, Ricardo; Júlio, Eduardo
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)
      Nowadays, the decarbonization of the concrete sector is a priority to counteract the global environmental harmful. Knowing that Portland cement is responsible for significant anthropogenic emissions worldwide, the optimization ...

    • MECHANICAL AND IMAGE ANALYSIS OF ADHESION BETWEEN MINERAL AGGREGATE AND BITUMINOUS BINDER 

      Autor: Trejbal, Jan; Valentová, Tereza; Nežerka, Václav; Semerák, Petr
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2020)
      Asphalt mixtures often fail due to poor interaction between mineral aggregate and bituminous binder. Therefore, many efforts are being made on adhesion improvement between the two materials. In this work, paving grade ...

    • MECHANICAL AND OPTICAL INVESTIGATION OF LASER WELDED STRUCTURAL STEEL - POLY(METHYL-METHACRYLATE) HYBRID JOINT STRUCTURES 

      Autor: Csizér, Tamás; Temesi, Tamás; Molnár, László
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2019)
      Modern welding processes that can easily be automated (such as friction stir welding, laser welding and ultrasonic welding) are gaining popularity in joining metal-polymer hybrid structures. This field of science is ...

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

      Autor: 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 AND STRUCTURAL PROPERTIES OF COLLAGEN NANOFRIBROUS LAYERS UNDER SIMULATED BODY CONDITIONS 

      Autor: Říhová, Jitka; Suchý, Tomáš; Vištejnová, Lucie; Horný, Lukáš; Šupová, Monika
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2019)
      The theme of this paper is the analysis of mechanical and structural properties of nanofibrous COL under simulated body conditions and in the presence of osteoblasts and dermal fibroblasts. COL were prepared by electrostatic ...

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

      Autor: 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 MODEL FOR HUMAN BALANCING ON ROLLING BALANCE BOARD 

      Autor: Molnar, Csenge A.; Zelei, Ambrus; Insperger, Tamas
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2018)
      A two-degree-of-freedom mechanical model was developed to analyze human balancing on rolling balance board in the frontal plane. The human nervous system is modeled as a proportionalderivative controller with constant ...

    • MECHANICAL PROPERTIES IMPROVEMENT OF FIBER REINFORCED CONCRETE 

      Autor: Trejbal, Jan; Nežerka, Václav; Hlůžek, Radim; Prošek, Zdeněk
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2019)
      Fiber reinforced concrete mechanical properties are limited due to low adhesion between polymer fibers and cement matrix. To ensure a strong interaction between the two materials, polypropylene fibers (d = 0.305mm) were ...

    • Mechanical properties of basalt: a study on compressive loading at different strain rates using SHPB 

      Autor: Falta, Jan; Krčmářová, Nela; Fíla, Tomáš; Vavro, Martin; Vavro, Leona
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2023)
      This article focuses on the mechanical properties of basalt in compressive loading at different strain-rates. The study employs advanced instrumentation for the evaluation of the results in dynamic conditions, while standard ...

    • MECHANICAL PROPERTIES OF CEMENT COMPOSITE CONTAINING RECYCLED CONCRETE AND ALKALI ACTIVATED BLAST FURNACE SLAG 

      Autor: Horych, Jan; Tesárek, Pavel; Prošek, Zdeněk
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2020)
      Recycling of materials is very popular and very important in these days. Finding the new ways to process and use these materials is a key to get rid of a lot of construction waste. The amount of landfilling needs to be ...