Prohlížení Acta Polytechnica dle názvu

Zobrazují se záznamy 396-415 z 880

    • ICECUBE OBSERVATORY: NEUTRINOS AND THE ORIGIN OF COSMIC RAYS 

      Autor: Desiati, Paolo
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      The completed IceCube Observatory, the first km3 neutrino telescope, is already providing the most stringent limits on the flux of high energy cosmic neutrinos from point-like and diffuse galactic and extra-galactic sources. ...

    • Idealized Compression Ratio for a Screw Briquetting Press 

      Autor: Biath , Peter; Ondruška , Juraj
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)
      This paper deals with issues in determining the ideal compression ratio for a screw briquetting press. First, the principles of operation and a basic description of the main parts of a screw briquetting press are introduced. ...

    • Ignition Features of Plasma-Beam Discharge in Gas-Discharge Electron Gun Operation 

      Autor: Tutyk , Valery A.; Ovcharuk , Anatoliy N.; Gasik , Michail I.; Maslenikov , Dmitriy V.
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      The current paper presents the results of experimental researches to determine the mode features of plasma-beam discharge (PBD) generation by an electron beam injected by a low-vacuum gasdischarge electron gun (LGEG) with ...

    • IMMOBILISATION OF HUMIC SUBSTANCES USING PLASMA MODIFICATION 

      Autor: Hájková , Pavlína; Tichý , David; Čmelík , Jiří; Antoš , Petr
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2015)
      This paper presents a study of the immobilization of humic substances (HSs) on a polypropylene (PP) nonwoven fabric. In order to attach the HSs, the PP nonwoven fabric was modified in a volume of nonthermal atmospheric ...

    • IMPACT OF PLASTIC DEFORMATION ON THE PROPERTIES OF A SELECTED ALUMINIUM ALLOY 

      Autor: Lišková , Anna; Lacková , Petra; Mihaliková , Mária; Kočiško , Róbert
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2016)
      This paper reports on an experiment to assess the influence of plastic deformation on the microstructure and properties of EN AW 6012 (AlMgSiPb) aluminium alloy in two states. The first was the initial state with heat ...

    • IMPACT OF STRAIN RATE ON MICROALLOYED STEEL SHEET BREAKING 

      Autor: Mihaliková , Mária; Német , Miroslav; Vojtko , Marek
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)
      Strain rate is a significant external factor and its influence on material behavior in forming process is a function of its internal structure. The contribution is analysis of the impact of loading rate from 1.6 x 10-4 ...

    • IMPLEMENTATION OF 3D VOF TRACKING ALGORITHM BASED ON BINARY SPACE-PARTITIONING 

      Autor: Kolařík , Filip; Patzák , Bořek
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2017)
      The paper focuses on modelling free surface flow. The interface is modelled using the Volume-Of-Fluid method, where the advection of volume fractions is treated by a purely geometrical method. The novelty of the work lies ...

    • IMPORTANCE OF A TYPE OF GATING SYSTEM IN INVESTMENT CASTING TECHNOLOGY 

      Autor: Vrátný , Ondřej; Herman , Aleš
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2019)
      At present, there is an increasing demand for the Investment casting technology. It is necessary to ensure their dimensional accuracy as well as internal quality and their desired macrostructure and microstructure. This ...

    • IMPROVEMENT OF ENERGY CONSUMPTION IN SPECTRUM SENSING COGNITIVE RADIO NETWORKS USING AN EFFICIENT TWO STAGE SENSING METHOD 

      Autor: Abdullah Najem, Hikmat; Abed Sami, Hadeel
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2017)
      Cognitive radio (CR) is a wireless technology developed to improve the usage in the spectrum frequency. Energy consumption is considered as a big problem in this technology, especially during a spectrum sensing. In this ...

    • IMPROVEMENT OF MACHINE SAFETY DEVICES 

      Autor: Hevko Matviiovych, Bohdan; Hevko Bohdanovych, Roman; Klendii Mykolaivna, Oleksandra; Buriak Vasyliovych, Mykola; Dzyadykevych Volodymyrovych, Yurii; Rozum Ivanovych, Ruslan
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2018)
      The article presents a development of new machine safety devices, which provide protection of operating elements from overload. Theoretical calculations have been made in order to determine the optimum design, kinematic ...

    • Improvement of spectrum sensing performance in cognitive radio using modified hybrid sensing method 

      Autor: Abed, Hadeel S.; Abdullah, Hikmat N.
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)
      Cognitive radio (CR) is a wireless technology for increasing the bandwidth usage. Spectrum sensing (SS) is the first step in CR. There are three basic techniques in SS, energy detection (ED), matched filter (MF), and ...

    • Improving QoS in mobile multimedia streaming with SCTP-PQ 

      Autor: Hüseynli, Alisettar; Şimşek, Mehmet; Akcayol, M. Ali
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2023)
      The Stream Control Transmission Protocol (SCTP) is often the preferred transport layer protocol in streaming applications. This protocol combines the best aspects of Transmission Control Protocol (TCP) and User Datagram ...

    • IMPROVING SPECIFIC POWER CONSUMPTION FOR MECHANICAL MIXING OF THE FEEDSTOCK IN A BIOGAS FERMENTER BY MECHANICAL DISINTEGRATION OF LIGNOCELLULOSE BIOMASS 

      Autor: Kratky , Lukas; Jirout , Tomáš
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)
      Lignocellulosic biomass particles in biogas fermenter batch either sediment towards vessel bottom or rise towards batch surface, where they float and form a compact thick scum. These processes have primarily the negative ...

    • Improving the efficiency of a steam power plant cycle by integrating a rotary indirect dryer 

      Autor: Sabatini, Michel; Havlík, Jan; Dlouhý, Tomáš
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2021)
      This article deals with the integration of a rotary indirect dryer, heated by low pressure extraction steam, into the Rankine cycle. The article evaluates the power generation efficiency of a steam power plant, with an ...

    • Improving the energy efficiency of a tram’s running gear 

      Autor: Semenov, Stanislav; Mikhailov, Evgeny; Kliuiev, Sergii; Dižo, Ján; Blatnický, Miroslav; Ishchuk, Vadym
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2023)
      This research analyses the influence of some design features of an undercarriage of a tram on the energy efficiency in terms of mechanical energy losses during its operation. The work includes the comparison of results of ...

    • In memory of Alois Apfelbeck: An Interconnection between Cayley-Eisenstein-Pólya and Landau Probability Distributions 

      Autor: Vojta , Vladimír
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      The interconnection between the Cayley-Eisenstein-Pólya distribution and the Landau distribution is studied, and possibly new transform pairs for the Laplace and Mellin transform and integral expressions for the Lambert W ...

    • IN-CYLINDER MASS FLOW ESTIMATION AND MANIFOLD PRESSURE DYNAMICS FOR STATE PREDICTION IN SI ENGINES 

      Autor: Sławomir , Wojnar; Rohal-Ilkiv , Boris; Šimončic , Peter; Honek , Marek; Jozef , Csambál
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)
      The aim of this paper is to present a simple model of the intake manifold dynamics of a spark ignition (SI) engine and its possible application for estimation and control purposes. We focus on pressure dynamics, which may ...

    • Inactivation of Candida albicans by Corona Discharge: The Increase of Inhibition Zones Area After Far Subsequent Exposition 

      Autor: Fantova , Vladyslava; Bujaček , Karol; Kříha , Vítězslav; Julák , Jaroslav
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      The cold atmospheric pressure plasma generated by the negative corona discharge has inhibition effect on the microorganism growth. This effect is well-known and it can be demonstrated on the surface of cultivation agar ...

    • INDICATORS FOR COMMON CROSSING STRUCTURAL HEALTH MONITORING WITH TRACK-SIDE INERTIAL MEASUREMENTS 

      Autor: Sysyn , Mykola; Gerber , Ulf; Nabochenko , Olga; Li , Yangyang; Kovalchuk , Vitalii
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2019)
      This paper focuses on the experimental study of an alteration in the railway crossing dynamic response due to the rolling surface degradation during a crossing’s lifecycle. The maximal acceleration measured with the ...

    • Induction motor mechanical defect diagnosis using DWT under different loading levels 

      Autor: Bouzida, Ahcene; Abdelli, Radia; Boudouda, Aimad
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2023)
      The information extraction capability of the widely used signal processing tool, FFT for diagnosing induction machines, is commonly used at a constant load or at different levels. The loading level is a major influencing ...