Prohlížení Acta Polytechnica dle názvu

Zobrazují se záznamy 639-658 z 880

    • PRELIMINARY STUDY ON COMBUSTION AND OVERALL PARAMETERS OF SYNGAS FUEL MIXTURES FOR SPARK IGNITION COMBUSTION ENGINE 

      Autor: Toman , Rastislav; Polóni , Marián; Chríbik , Andrej
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2017)
      This paper presents a numerical study on a group of alternative gaseous fuels – syngases, and their use in the spark-ignition internal combustion engine Lombardini LGW 702. These syngas fuel mixtures consist mainly of ...

    • PRIMARY PEAK RATIO CORRELATION TO THE MEASUREMENT ACCURACY OF PIV METHOD 

      Autor: Novotny , Jan; Machovska , Ilona
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2018)
      An estimation of a measurement accuracy at each measured point is crucial regarding the applicability of results of the measurements. The aim of this work is to determine the correlation between individual metrics and the ...

    • Problems with reinforced concrete industrial floors with regard to subsoil swelling 

      Autor: Pruška, Jan; Šedivý, Miroslav; Anderle, Vojtěch
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2024)
      Most of the problems associated with open cracks in reinforced concrete industrial floors do not arise from technological indiscipline in the execution or exceeding the permitted floor load, but from the geotechnical profile ...

    • Process optimization and performance evaluation of a downdraft gasifier for energy generation from wood biomass 

      Autor: Daniyan, Ilesanmi; Ale, Felix; Uchegbu, Ikenna Damian; Bello, Kazeem; Osazele, Momoh
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2021)
      In recent time, due to the increasing demand for energy and the need to address environment-related issues, a great deal of focus has been given to alternative sources of energy, which are green, sustainable and safe. This ...

    • Production of Biocellulosic Ethanol from Wheat Straw 

      Autor: Ismail ,; Ali , W.; Braim ,; Rasul , R.; Ketuly ,; Aziz , K.; Bujag , Awang; Shamsiah , D. Siti; Arifin ,; Zainudin ,
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)
      Wheat straw is an abundant lignocellulosic feedstock in many parts of the world, and has been selected for producing ethanol in an economically feasible manner. It contains a mixture of sugars (hexoses and pentoses).Two-stage ...

    • Production of Biodiesel from Vegetable Oil Using Microware Irradiation 

      Autor: Kapilan , N.
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)
      The petroleum oil supply crisis, the increase in demand and the price eruption have led to a search for an alternative fuel of bio-origin in India. Among the alternative fuels, biodiesel is considered as a sustainable ...

    • PRODUCTION OF PROTOTYPE PARTS USING DIRECT METAL LASER SINTERING TECHNOLOGY 

      Autor: Sedlak , Josef; Zemčík , Oskar; Slaný , Martin; Chladil , Josef; Kouřil , Karel; Sekerka , Vít; Rozkošný , Luboš
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2015)
      Unconventional methods of modern materials preparation include additive technologies which involve the sintering of powders of different chemical composition, granularity, physical, chemical and other utility properties. ...

    • PROPERTIES AND MICROSTRUCTURE OF CEMENT PASTE INCLUDING RECYCLED CONCRETE POWDER 

      Autor: Topič , Jaroslav; Prošek , Zdenek
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2017)
      The disposal and further recycling of concrete is being investigated worldwide, because the issue of complete recycling has not yet been fully resolved. A fundamental difficulty faced by researchers is the reuse of the ...

    • PROPERTIES OF A DIFFERENTIAL SEQUENCE BASED UPON THE KUMMER-SCHWARZ EQUATION 

      Autor: Maharaj , Adhir; Andriopoulos , Kostis; Leach , Peter
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2020)
      In this paper, we determine a recursion operator for the Kummer-Schwarz equation, which leads to a sequence with unacceptable singularity properties. A different sequence is devised based upon the relationship between the ...

    • PROPOSAL OF NEW OPTICAL ELEMENTS 

      Autor: Chadzitaskos , Goce; Tolar , Jiří
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      A overview of our patented proposals of new optical elements is presented. The elements are suitable for laser pulse analysis, telescopy, X-ray microscopy and X-ray telescopy. They are based on the interference properties ...

    • PROTECTION OF WOODEN MATERIALS AGAINST BIOLOGICAL ATTACK BY USING NANOTECHNOLOGY 

      Autor: Havrlik , Michal; Ryparová , Pavla
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2015)
      This article is focused on protection of wooden materials by using nanofibrous textiles with biocidal addition, which continues on the work of a group at the Center for Nanotechnology at the Faculty of Civil Engineering ...

    • PROTON STOPPING POWER OF DIFFERENT DENSITY PROFILE PLASMAS 

      Autor: Casas , David; Barriga-Carrasco , Manuel D.; Andreev , Alexander A.; Schnürer , Matthias; Morales , Roberto
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2015)
      In this work, the stopping power of a partially ionized plasma is analyzed by means of free electron stopping and bound electron stopping. For the first instance, the RPA dielectric function is used, and for the latter ...

    • Proton- and -radiation of the Micro-Pinch with the Boron-Containing Target 

      Autor: Gurin , Anatolii A.; Adamenko , Andrii S.; Adamenko , Stanislav V.; Kuzmenko , Mykola M.
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      Using ion pinhole camera and track detectors, the image of hot spot is recorded in a pulsed diode micro-pinch equipped with a solid anode target. The track image is a record of repeated fronts of fast protons with energies ...

    • PŘEDMLUVA 

      Autor: Bodnár, Tomáš; Dvořák, Rudolf
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2021)

    • PYROLYSIS OF BROWN COAL USING A CATALYST BASED ON W–Ni 

      Autor: Jílková , Lenka; Ciahotný , Karel; Kusý , Jaroslav
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2015)
      Tars from pyrolysis of brown coal can be refined to obtain compounds suitable for fuel production. However, it is problematic to refine the liquids from brown coal pyrolysis, because high molecular compounds are produced, ...

    • Qualitative sign stability of linear time invariant descriptor systems 

      Autor: Chand, Madhusmita; Paitandi, Mamoni; Gupta, Mahendra Kumar
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2023)
      This article discusses assessing the instability of a continuous linear homogeneous timeinvariant descriptor system. Some necessary conditions and sufficient conditions are derived to establish the stability of a matrix ...

    • QUANTIFICATION OF RESPIRATORY SINUS ARRHYTHMIA WITH HIGH-FRAMERATE ELECTRICAL IMPEDANCE TOMOGRAPHY 

      Autor: Antink Hoog, Christoph; Leonhardt , Steffen
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      Respiratory Sinus Arrhythmia, the variation in the heart rate synchronized with the breathing cycle, forms an interconnection between cardiac-related and respiratory-related signals. It can be used by itself for diagnostic ...

    • Quantization of rationally deformed Morse potentials by Wronskian transforms of Romanovski-Bessel polynomials 

      Autor: Natanson, Gregory
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)
      The paper advances Odake and Sasaki’s idea to re-write eigenfunctions of rationally deformed Morse potentials in terms of Wronskians of Laguerre polynomials in the reciprocal argument. It is shown that the constructed ...

    • Quantum description of angles in the plane 

      Autor: Beneduci, Roberto; Frion, Emmanuel; Gazeau, Jean-Pierre
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)
      The real plane with its set of orientations or angles in [0, π) is the simplest non trivial example of a (projective) Hilbert space and provides nice illustrations of quantum formalism. We present some of them, namely ...

    • QUASI-EXACTLY SOLVABLE SCHRÖDINGER EQUATIONS, SYMMETRIC POLYNOMIALS AND FUNCTIONAL BETHE ANSATZ METHOD 

      Autor: Quesne , Christiane
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2018)
      For applications to quasi-exactly solvable Schrödinger equations in quantum mechanics, we consider the general conditions that have to be satisfied by the coefficients of a second-order differential equation with at most ...