Prohlížení ČVUT - elektronické publikace dle názvu

Zobrazují se záznamy 554-573 z 1904

    • EFFECT OF PVA MODIFICATION ON PROPERTIES OF CEMENT COMPOSITES 

      Autor: Topič , Jaroslav; Prošek , Zdeněk; Indrová , Kateřina; Plachý , Tomáš; Nežerka , Václav; Kopecký , Lubomír; Tesárek , Pavel
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2015)
      Polymers are used for modification of the cement-based composites and others building materials since the thirties of 20th century. Based on the conclusions of recent studies, it is assumed that even water soluble polymers ...

    • EFFECT OF SLIP VELOCITY ON THE PERFORMANCE OF A SHORT BEARING LUBRICATED WITH A MAGNETIC FLUID 

      Autor: Patel U., Rachana; Deheri M., G.
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      This paper aims at analyzing the effect of velocity slip on the behavior of a magnetic fluid based infinitely short hydrodynamic slider bearing. Solving the Reynolds’ equation, the expression for pressure distribution is ...

    • Effect of superplasticizer on the strength of fly ash based geopolymer concrete 

      Autor: Dela Cruz, Rhem Leoric Cantos; Roriguez, Leah Monica Alaurin; Tiongco, Emmanuel Josh Yambing; Yulas, Khim Denize Asilo; Ongpeng, Jason Maximino
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)
      In this research, the effect of a polycarboxylate based superplasticizer on the strength of Geopolymer Concrete (GPC) was investigated. A fixed amount of superplasticizer (1.5 % of Fly Ash weight) was utilized along with ...

    • EFFECT OF THE ADDITION OF LI ON THE STRUCTURE AND MECHANICAL PROPERTIES OF HYPOEUTECTIC Al-Mg2Si ALLOYS 

      Autor: Prach , Olena; Horník , Jakub; Mykhalenkov , Kostiantyn
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2015)
      Alloys with various contents of Li were studied by means of  differential scanning calorimetry (DSC), transmission electron microscopy (TEM) and energy dispersive X-Ray microanalysis (EDX).The TEM investigations revealed ...

    • EFFECT OF THE APPLICATION OF MICROWAVE ENERGY ON THE REGENERATION OF THE ADSORBENT 

      Autor: Dobrotvorskiy , Sergey; Aleksenko , Borys; Dobrovolska , Ludmila; Basova , Yevheniia
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2018)
      Today, energy conservation is a priority. This is due to the shortage of energy resources, the growth of their cost and global environmental problems. The production of compressed air is a wery costly and power-consuming ...

    • EFFECT OF THE FLOW FIELD DEFORMATION IN THE WIND TUNNEL ON THE AERODYNAMIC COEFFICIENTS 

      Autor: Maturkanič , Dušan
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2015)
      The flow field quality has a principal signification at wind tunnel measurement. The creation of the flow field of air by fan leads to the rotation of entire flow field which is, moreover, deformed at the bends of the wind ...

    • Effect of the long-term storage methods on the stability of cartilage biomechanical parameters 

      Autor: Žaloudková, Blanka; Sekorová, Šárka; Kopecká, Barbora; Kytýř, Daniel
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2023)
      Long-term stability of the tissue product in terms of mechanical parameters is a key factor for its expiration date. For the investigation of storage effects on the cartilage tissues the experimental mechanical loading ...

    • Effect of TiO2 and ZnO powder mixtures on mechanical and photocatalytic performance of high performance concrete 

      Autor: Amor, Fouad; Ingrišová, Lenka; Rácová, Zuzana; Baudys, Michal; Hájek, Petr
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)
      The development of new modified cement-based materials is increasingly becoming a necessity for improving the durability and surface performance of building materials. Titanium dioxide (TiO2) photocatalyst has been widely ...

    • EFFECT OF TUBE PITCH ON HEAR TRANSFER IN SPRINKLED TUBE BUNDLE 

      Autor: Kracík , Petr; Pospíšil , Jiří
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2015)
      Water flowing on a sprinkled tube bundle forms three basic modes: the Droplet mode (the liquid drips from one tube to another), the Jet mode (with an increasing flow rate, the droplets merge into a column) and the Membrane ...

    • Effect of using biomass fly ash on the concrete sustainability 

      Autor: Teixeira, Elisabete Rodrigues; Camões, Aires; Branco, Fernando G.
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)
      Biomass fly ash has been studied has a partial cement material, since this material has a positive effect on concrete properties. Even though, some mixes with BFA presents a positive benefit, they need to be economically ...

    • EFFECT OF VISCOUS DAMPING IN NUMERICAL CALCULATION OF CABLE-MEMBRANE STRUCTURES BY THE METHOD OF DYNAMIC RELAXATION 

      Autor: Huttner, Miloš; Fajman, Petr
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2018)
      The aim of this article is to assess the speed of convergence of numerical calculation of cable-membrane structures using dynamic relaxation method in the process of finding critical damping pre-calculated on undamped ...

    • EFFECTIVE FRACTURE ENERGY OF ULTRA-HIGH-PERFORMANCE FIBRE-REINFORCED CONCRETE UNDER INCREASED STRAIN RATES 

      Autor: Sovják , Radoslav; Rašínová , Jana; Máca , Petr
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)
      The main objective of this paper is to contribute to the development of ultra-high performance fibre reinforced concrete (UHPFRC) with respect to its effective fracture energy. Effective fracture energy was investigated ...

    • EFFECTIVE USE OF ROTARY FURNACE SHELL HEAT 

      Autor: Lisuch , Julius; Dorcak , Dusan; Spisak , Jan
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)
      Significant proportion of the total energy expenditure for the heat treatment of raw materials are heat losses through the shell of rotary furnace. Currently, the waste heat is not used in any way and escapes into the ...

    • EFFECTS OF ABRASIVES DURING ACCELERATED SIMULATION OF MECHANICAL CORROSION OF CEMENT COMPOSITES USING ABRASIVE WATER FLOW 

      Autor: Hlaváček, Petr; Sitek, Libor; Klichová, Dagmar; Bodnárová, Lenka
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2019)
      The paper deals with the use of the abrasive water flow technology in an accelerated simulation of the process of mechanical degradation of surface layers of cement-based composites by flowing liquids. Effects of the ...

    • EFFECTS OF DESIGN PARAMETERS ON STATIC EQUIVALENT STRESS OF RADIAL ROLLING BEARINGS 

      Autor: Bozca, Mehmet
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2021)
      The aim of this study is to theoretically investigate the effects of design parameters on the static equivalent stress of radial rolling bearings, such as the point contact case for ball bearings and line contact case for ...

    • EFFECTS OF INITIAL MOISTURE CONTENT ON THE PRODUCTION AND QUALITY PROPERTIES OF SOLID BIOFUEL 

      Autor: Matúš , Miloš; Križan , Peter; Beniak , Juraj; Šooš , Ľubomír
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2015)
      The moisture content of densified biomass is a limit parameter influencing the quality of the solid biofuel. It influences its calorific value, density, mechanical strength and dimensional stability as well as the production ...

    • EFFECTS ON THE FINAL INTENSITY OF INPUT FORCES IN LONGBOLTS INSTALLED AT THE MINING OPERATION 2 AREA, OKD, INC. 

      Autor: Dvořák , Pavel; Jiránková , Eva
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2018)
      In the deep coal mines of OKD, Inc., both bolts and long bolts of different designs are used for the rock massif and steel arch support reinforcement. Continuous measurement of forces in 6 strand bolts and 1 cable bolt ...

    • Efficient Structure from Motion by Graph Optimization 

      Autor: Havlena, Michal; Torii, Akihiko; Pajdla, Tomáš
      (Springer Berlin, 2010)
      We present an efficient structure from motion algorithm that can deal with large image collections in a fraction of time and effort of previous approaches while providing comparable quality of the scene and camera ...

    • EIGENVALUE COLLISION FOR PT-SYMMETRIC WAVEGUIDE 

      Autor: Borisov , Denis
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)
      We consider a model of a planar PT-symmetric waveguide and study the phenomenon of the eigenvalue collision under perturbation of the boundary conditions. This phenomenon was discovered numerically in previous works. The ...

    • EIGENVALUES EVALUATION OF GENERALLY DAMPED ELASTIC DISC BRAKE MODEL LOADED WITH NON-CONSERVATIVE FRICTION FORCE 

      Autor: Úradníček , Juraj; Musil , Miloš; Bachratý , Michal
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2020)
      This paper deals with the evaluation of eigenvalues of a linear damped elastic two-degrees-of-freedom system under a non- onservative loading. As a physical interpretation of a proposed mathematical model, a simplified ...