• NON-DESTRUCTIVE INSPECTION BY INFRARED THERMOGRAPHY OF RESISTANCE SPOT WELDS USED IN AUTOMOTIVE INDUSTRY 

      Autor: Forejtová , Lucie; Zavadil , Tomáš; Kolařík , Ladislav; Kolaříková , Marie; Sova , Jan; Vávra , Petr
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2019)
      Resistance spot welding (RSW) is one of the main joining technologies of thin sheets in the automotive industry. Key factors affecting the strength of the RSW joint are the nugget diameter, asymmetry, expulsions, intended ...
    • OPTIMIZATION OF BIODIESEL PRODUCTION FROM WASTE FRYING OIL OVER ALUMINA SUPPORTED CHICKEN EGGSHELL CATALYST USING EXPERIMENTAL DESIGN TOOL 

      Autor: Yusuff S., Adeyinka; Popoola T., Lekan
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2019)
      An optimization of the biodiesel production from a waste frying oil via a heterogeneous transesterification was studied. This present study is also aimed at investigating the catalytic ehaviour of the alumina supported ...
    • OPTIMIZATION OF COMPUTATIONAL BURDEN OF THE POINT INFORMATION GAIN 

      Autor: Urban , Jan; Rychtáriková , Renata; Macháček , Petr; Štys , Dalibor; Urbanová , Pavla; Císař , Petr
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2019)
      We developed a method of image preprocessing based on the information entropy, namely, on the information contribution made by each individual pixel to the whole image or to image’s part (i.e., a Point Information Gain; ...
    • PARTICLE MOTION OVER THE EDGE OF AN INCLINED PLANE THAT PERFORMS AXIAL MOVEMENT IN A VERTICAL LIMITING CYLINDER 

      Autor: Pylypaka F., Serhii; Klendii B., Mykola; Nesvidomin M., Viktor; Trokhaniak I., Viktor
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2019)
      Differential equations of a relative material particle motion over the edge of an inclined flat ellipse that rotates around the axis of a vertical limiting cylinder have been deduced. The position of a plane relative to ...
    • PARTICULARS OF ADSORBENT REGENERATION WITH THE USE OF MICROWAVE ENERGY 

      Autor: Dobrotvorskiy , Sergey; Dobrovolska , Ludmila; Basova , Yevheniia; Aleksenko , Borys
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2019)
      Energy conservation issues are acute in the world. Compressed air is widely used in the modern industrial production. The production of compressed air is a very energy-intensive process, since most of the energy, which is ...
    • PNEUMATIC SYSTEMS FOR AUTOMATIC SORTING EQUIPMENT 

      Autor: Onderová , Iveta; Čačko , Viliam; Kolláth , Ľudovít; Šooš , Ľubomír; Smelík , Andrej; Varga , Alexander
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2019)
      The aim of the research work was focused on a research of manipulators design using suction grippers. The results of the research can be applied in the design of jigs - manipulators for handling thin sheets. The FME analysis ...
    • SIMULATION OF LOW-GRADE COAL COMBUSTION IN REAL CHAMBERS OF ENERGY OBJECTS 

      Autor: Askarova , Aliya; Bolegenova , Saltanat; Bolegenova , Symbat; Beketayeva , Meruyert; Maximov , Valeriy; Nugymanova , Aizhan; Šafařík , Pavel
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2019)
      The aim of the work is to create new computer technologies for 3D modelling of heat and mass transfer processes in high-temperature physicochemically reacting environments that will allow to determine the aerodynamics of ...
    • SOLAR ABSORBER WITH A STRUCTURED SURFACE – A WAY TO INCREASE EFFICIENCY 

      Autor: Mrňa , Libor; Řiháček , Jan; Šarbort , Martin; Horník , Petr
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2019)
      The basic idea of a solar absorber’s thermal gain increase is the keyhole effect utilization during which the radiation is absorbed by multiple reflections on cavity walls. The lattice of pyramidal or conical cavities on ...
    • STUDY OF SAMPLES STRENGTH OF MATERIAL FORMED BY THE PROCESSES OF COMPACTION EXTRUSION AND TUMBLING GRANULATION 

      Autor: Peciar , Peter; Ružinský , Radovan; Guštafík , Adam; Karľová , Mária; Čierny , Matúš; Fekete , Roman; Peciar , Marián
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2019)
      In a period of industrial expansion, protection of the environment is often neglected during the mass manufacture of products. One of the problems of our society that is necessary to face at present is the provision, ...
    • STUDY OF SYNTHETIC DYE REMOVAL USING FENTON/TiO2, FENTON/UV, AND FENTON/TiO2/UV METHODS AND THE APPLICATION TO JUMPUTAN FABRIC WASTEWATER 

      Autor: Agustina , Tuty Emilia; Teguh , Dedi; Wijaya , Yourdan; Mermaliandi , Febrian; Bustomi , Ahmad; Manalaoon , Jantan; Theodora , Gita; Rebecca , Tessa
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2019)
      Synthetic dyes were commonly used in textile industries such as Jumputan fabric industries in South Sumatera. Most of these industries were categorized as a home industry without a wastewater treatment plant, so the ...
    • TECHNOLOGY OF PRODUCING REINFORCED CONCRETE COLUMNS OF CIRCULAR CROSS-SECTIONAL AND INVESTIGATION OF THEIR STRAIN-STRESS STATE AT TRANSVERSE-LONGITUDINAL BENDING 

      Autor: Rogovskii L., Ivan; Titova L., Liudmyla; Davydenko O., Oleksii; Trokhaniak I., Viktor; Trokhaniak M., Oleksandra
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2019)
      The paper presents a method of producing Circular Cross-Section Columns (CCSC), which can provide sufficiently precise dimensions, with longitudinal reinforcement securely fixed in special plugs. An investigation procedure ...
    • 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 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 INFLUENCE OF BASALT MINERALS AS CEMENT SUBSTITUTION MATERIALS IN MORTAR 

      Autor: Amin , Muhammad; Birawidha , David Candra; Isnugroho , Kusno; Hendronursito , Yusup; Sumardi , Slamet; Ario , Septa; Syafriadi , Syafriadi; Al-Muttaqii , Muhammad
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2019)
      This study was conducted to determine the effect of the concentration of basalt as a cement substitution material in mortar. Basalt was analysed by XRD and XRF. From the XRD results, the diffractogram shows the dominant ...
    • THE SUGGESTIONS AS TO THE CALCULATION BEARING CAPACITY OF SANDWICH REINFORCED CONCRETE — FOAMED CONCRETE FLOOR SLABS 

      Autor: Lytvyniak , Oksana; Tashak , Myroslava
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2019)
      This article presents the results of an experimental research of sandwich reinforced concrete-foamed concrete floor slabs. These floor slabs combine three different materials — normal concrete, foamed concrete and a steel ...
    • TRACK GAUGE STABILITY UNDER EFFECT OF SLEEPER THERMAL EXPANSION 

      Autor: Lojda , Vít; Krejčiříková , Hana
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2019)
      Railway sleepers are traditionally made of hardwood, pre-stressed concrete or steel. However, emerging advanced materials, including polymers or composites, are investigated for a possible employment in the sleeper production. ...
    • TUNNEL PORTAL INSTABILITY IN LANDSLIDE AREA AND REMEDIAL SOLUTION: A CASE STUDY 

      Autor: Farhadi Ayoublou , Farhad; Taromi , Majid; Eftekhari , Abbas
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2019)
      The construction of tunnel portals in mountainous or slope areas often involves problems, which are closely related to factors, such as slope topography, geology, geotechnics, construction geometry and the tunnel excavation ...
    • WAAM TECHNOLOGY OPTIMIZED BY OFF-LINE 3D ROBOT SIMULATION 

      Autor: Gurčík, Tomáš; Kovanda, Karel
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2019)
      WAAM (Wire + Arc Additive Manufacturing) is an alternative additive technology that combines an electric arc as a heat source, filler material in the form of a wire for welding and cladding individual weld passes so as to ...
    • WELDING OF NITINOL BY SELECTED TECHNOLOGIES 

      Autor: Kramár , Tomáš; Tauer , Jan; Vondrouš , Petr
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2019)
      Nitinol is a perspective alloy that is difficult to weld because of its high sensitivity to heat, atmospheric gases and the NiTi phase instability. We evaluated several welding techniques with regard to their applicability ...