Prohlížení Acta Polytechnica dle názvu

Zobrazují se záznamy 151-170 z 880

    • Change of Pressing Chamber Conicalness at Briquetting Process in Briquetting Machine Pressing Chamber 

      Autor: Križan , Peter; Matúš , Miloš; Kers , Jaan; Vukelić , Djordje
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)
      In this paper, we will present the impact of the conical shape of a pressing chamber, an important structural parameter. Besides the known impact of the technological parameters of pressing chambers, it is also very important ...

    • CHANGES IN THE SURFACE LAYER OF ROLLED BEARING STEEL 

      Autor: Zemčík , Oskar; Sedlák , Josef; Chladil , Josef
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2015)
      This paper describes changes observed in bearing steel due to roller burnishing. Hydrostatic roller burnishing was selected as the most suitable method for performing roller burnishing on hardened bearing steel. The ...

    • CHAOTISED POLYMERIC HOLLOW FIBRE BUNDLE AS A CROSSFLOW HEAT EXCHANGER IN AIR-WATER APPLICATION 

      Autor: Kroulíková , Tereza; Astrouski , Ilya; Raudenský , Miroslav
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2020)
      Fifteen years ago, polymeric hollow fibre heat exchangers were presented for the first time. Nowadays there are not only the shell-and-tube types as there were at the beginning. In this paper, six chaotised polymeric hollow ...

    • Characterization of Human Gait using Fuzzy Logic 

      Autor: Kutilek , Patrik; Viteckova , Slavka; Svoboda , Zdenek
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      In medical practice, there is no appropriate widely-used application of a system based on fuzzy logic for identifying the lower limb movement type or type of walking. The object of our study was to determine characteristics ...

    • CHARACTERIZATION OF RECYCLED LINEAR DENSITY POLYETHYLENE/IMPERATA CYLINDRICA PARTICULATE COMPOSITES 

      Autor: Olusunmade Femi, Olusola; Zechariah , Sunday; Yusuf Ayotunde, Taofeek
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2018)
      Water-sachets made from low density polyethylene (LDPE) form a bulk of plastic wastes which creates environmental challenges, while certain species of plants like Imperata cylindrica constitute large portion of weeds on ...

    • CHARACTERIZATION OF SELECTED PROPERTIES OF COMPOSITES OF WASTE PAPER WITH UNTREATED BAMBOO STEM FIBRE AND RICE HUSK 

      Autor: Yusuf Ayotunde, Taofeek
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2017)
      Composite technology is an excellent approach to utilizing natural fibres and agricultural wastes, which constitute an environmental nuisance. Efforts are being made to characterize the properties of composites produced ...

    • Checking the Geometric Accuracy of a Machine Tool for Selected Geometric Parameters 

      Autor: Janásek , Adam; Čep , Robert; Brychta , Josef
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)
      This paper deals with the control parameters for selected geometric accuracy measurements for a machine tool. The parameters were needed after a refurbished milling machine was purchased. After setting up the machine, it ...

    • CHIMNEY RESERVOIRS: UNIQUE TECHNICAL STRUCTURES FROM THE FIRST HALF OF THE 20TH CENTURY IN THE CZECH REPUBLIC 

      Autor: Vonka , Martin; Kořínek , Robert
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2018)
      In the past, various methods and technological systems were used to supply water on industrial and other sites. In the early 19th century, Professor Otto Intze invented a new form of water reservoir that could be installed ...

    • Classification of Variable Objects for Search for GRB Candidates on Bamberg Photographic Plates 

      Autor: Hudec , René; Kopel , Fabian; Macsics , Robert; Hadwige , Markus; Heber , Ulrich; Cayé , Walter
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      We report on an ongoing study based on blink-comparison of more than 5000 Bamberg Observatory Southern Sky Patrol Plates performed within a continuation of a student high school project (Jugend Forscht). After a detailed ...

    • Clock Math — a System for Solving SLEs Exactly 

      Autor: Hladík , Jakub; Lórencz , Róbert; Šimeček , Ivan
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      In this paper, we present a GPU-accelerated hybrid system that solves ill-conditioned systems of linear equations exactly. Exactly means without rounding errors due to using integer arithmetics. First, we scale floating-point ...

    • CO2 power cycle chemistry in the CV Řež experimental loop 

      Autor: Berka, Jan; Ballek, Jakub Vojtěch; Velebil, Ladislav; Purkarová, Eliška; Vagenknechtová, Alice; Hlinčík, Tomáš
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2021)
      Power cycles using carbon dioxide in a supercritical state (sc-CO2) can be used in both the nuclear and non-nuclear power industry. These systems are characterized by their advantages over steam power cycles, e. g., the ...

    • COMMON CROSSING CONDITION MONITORING WITH ON BOARD INERTIAL MEASUREMENTS 

      Autor: Sysyn, Mykola; Nabochenko, Olga; Gerber, Ulf; Kovalchuk, Vitalii; Petrenko, Oleksiy
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2019)
      A railway turnout is an element of the railway infrastructure that influences the reliability of a railway traffic operation the most. The growing necessity for the reliability and availability in the railway transportation ...

    • COMPARATIVE MEASUREMENTS OF HEAD ANGULAR MOVEMENTS USING A CAMERA SYSTEM AND A GYROSCOPE SYSTEM 

      Autor: Socha , Vladimir; Kutilek , Patrik; Cakrt , Ondrej; Cerny , Rudolf
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)
      Assessments of body-segment angular movements are very important in the rehabilitation process. Head angular movements are measured and analyzed for use in studies of stability and posture. However, there is no methodology ...

    • COMPARATIVE STUDY AND EMPIRICAL MODELLING OF PULVERIZED COCONUT SHELL, PERIWINKLE SHELL AND PALM KERNEL SHELL AS A POZZOLANS IN CONCRETE 

      Autor: Ikponmwosa , Efe Ewaen; Ehikhuenmen , Samuel Onosedeba; Irene , Karieren Kate
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2019)
      Infrastructural development across the world is fast growing due to the rapid growth in population. This has resulted in consequently creating an increase in the demand for construction materials, especially cement. This ...

    • Comparative study of state space averaging and PWM with extra element theorem techniques for complex cascaded DC-DC Buck converter 

      Autor: Shete, Sangeeta; Joshi, Prasad
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2023)
      Until now, most commonly used state space averaging and PWM techniques have been applied to different converter topologies and their advantages and disadvantages were stated. However, the superiority of an analytical ...

    • Comparision of the walk techniques for fitness state space analysis in vehicle routing problem 

      Autor: Agárdi, Anita; Kovács, László; Bányai, Tamás
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2021)
      The Vehicle Routing Problem (VRP) is a highly researched discrete optimization task. The first article dealing with this problem was published by Dantzig and Ramster in 1959 under the name Truck Dispatching Problem. Since ...

    • COMPARISON BETWEEN 2D TURBULENCE MODEL ESEL AND EXPERIMENTAL DATA FROM AUG AND COMPASS TOKAMAKS 

      Autor: Ondac , Peter; Horacek , Jan; Seidl , Jakub; Vondrácek , Petr; Müller Werner, Hans; Adámek , Jirí; Nielsen Henry, Anders
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2015)
      In this article we have used the 2D fluid turbulence numerical model, ESEL, to simulate turbulent transport in edge tokamak plasma. Basic plasma parameters from the ASDEX Upgrade and COMPASS tokamaks are used as input for ...

    • COMPARISON OF ACTUAL GROUND SETTLEMENTS IN TUNNELLING EXCAVATION TO MODEL PREDICTIONS 

      Autor: Saplachidi , Alexandra; Vougioukas , Emmanouil
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2018)
      It has been discovered that the underground structures are vulnerable to seismic phenomena mainly due to permanent ground deformations caused by earthquakes rather than the dynamic seismic movement itself. Several models ...

    • COMPARISON OF AXIAL FAN ROTOR EXPERIMENTAL DATA WITH CFD SIMULATION 

      Autor: Prachař , Aleš
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2016)
      Data obtained from an experimental simulation on a new test rig for axial fans are compared to a CFD simulation. The Edge solver is used and the development needed for the simulation (boundary conditions, free stream ...

    • COMPARISON OF CLASSICAL AND INTERACTIVE MULTI-ROBOT EXPLORATION STRATEGIES IN POPULATED ENVIRONMENTS 

      Autor: Kalde , Nassim; Simonin , Olivier; Charpillet , François
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2015)
      Multi-robot exploration consists in coordinating robots for mapping an unknown environment. It raises several issues concerning task allocation, robot control, path planning and communication. We study exploration in ...