Prohlížení Acta Polytechnica dle názvu

Zobrazují se záznamy 31-50 z 880

    • A NEW AND ADAPTIVE SECURITY MODEL FOR PUBLIC COMMUNICATION BASED ON CORRELATION OF DATA FRAMES 

      Autor: Haider Tarish, Haider; Muhsen Halboot, Dhiaa; Shahadib Ismael, Haider; See Hang, Ong
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2019)
      Recent developments in communication and information technologies, plus the emerging of the Internet of Things (IoT) and machine to machine (M2M) principles, create the need to protect data from multiple types of attacks. ...

    • A NEW FASTENER TO ENSURE THE RELIABILITY OF A PASSENGER CAR BODY ON A TRAIN FERRY 

      Autor: Lovska, Alyona; Fomin , Oleksij
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2020)
      To ensure the strength of the passenger car bodies during transportation on train ferries, it is proposed to mount fastening elements of chain binders on the body bolster beams. The principle of such an element is based ...

    • A note on entanglement classification for tripartite mixed states 

      Autor: Zhao, Hui; Liu, Yu-Qiu; Wang, Zhi-Xi; Fei, Shao-Ming
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)
      We study the classification of entanglement in tripartite systems by using Bell-type inequalities and principal basis. By using Bell  unctions and the generalized three dimensional Pauli operators, we present a set of Bell ...

    • A NOVEL BCG SENSOR-ARRAY FOR UNOBTRUSIVE CARDIAC MONITORING 

      Autor: Böhm , Anna; Brüser , Christoph; Leonhardt , Steffen Leonhardt
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      Unobtrusive heart rate monitoring is a popular research topic in biomedical engineering. The reason is that convential methods, e.g. the clinical gold standard electrocardiography, require conductive contact to the human ...

    • A NOVEL PROJECTION ALGORITHM FOR PRODUCTION LAYOUT EXTRACTION FROM POINT CLOUDS 

      Autor: Bureš , Marek; Martirosov , Sergo; Polcar , Jiří
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2019)
      The paper is focused on point cloud data processing obtained by 3D laser scanning. The scanning devices are at a very advanced level and after reaching their possible maximum scanning speeds, manufacturers are now more ...

    • A Numerical Study of Wind Flow Over a Coal Storage Shelter 

      Autor: Bodnár , Tomáš; Beneš , Ludek; Pirkl , Luboš; Gulíková , Eva
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)
      This paper presents some of the main numerical results obtained while simulating the wind flow over a shelter covering a coal storage. The aim of this numerical study was to evaluate the change in flow patterns caused by ...

    • A Pulverized Coal-Fired Boiler Optimized for Oxyfuel Combustion Technology 

      Autor: Dlouhý , Tomáš; Dupal , Tomáš; Dlouhý , Jan
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)
      This paper presents the results of a study on modifying a pulverized coal-fired steam boiler in a 250 MWe power plant for oxygen combustion conditions. The entry point of the study is a boiler that was designed for standard ...

    • A QUANTITATIVE EVALUATION OF THE WATER DISTRIBUTION IN A SOIL SAMPLE USING NEUTRON IMAGING 

      Autor: Šácha , Jan; Sněhota , Michal; Hovind , Jan
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2016)
      This paper presents an empirical method by Kang et al. recently proposed for correcting two-dimensional neutron radiography for water quantification in soil. The method was tested on data from neutron imaging of the water ...

    • A SIMPLE DERIVATION OF FINITE-TEMPERATURE CFT CORRELATORS FROM THE BTZ BLACK HOLE 

      Autor: Ohya , Satoshi
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)
      We present a simple Lie-algebraic approach to momentum-space two-point functions of two-dimensional conformal field theory at finite temperature dual to the BTZ black hole. Making use of the real-time prescription of AdS/CFT ...

    • A Study of Coherent Radiation Generated in an Ablative Capillary Discharge 

      Autor: Hübner , Jakub; Vrba , Pavel
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      Feasible soft-X-ray amplification in the CVI and NVII Balmer transition is investigated in a capillary discharge. The best conditions and parameters for the experimental set-up are found for an ablative capillary. The ...

    • A STUDY OF FERROFLUID LUBRICATION BASED ROUGH SINE FILM SLIDER BEARING WITH ASSORTED POROUS STRUCTURE 

      Autor: Munshi M., Mohmmadraiyan; Patel R., Ashok; Deheri B., Gunamani
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2019)
      This paper attempts to study a ferrofluid lubrication based rough sine film slider bearing with assorted porous structure using a numerical approach. The fluid flow of the system is regulated by the Neuringer-Rosensweig ...

    • A Study of Parameters Setting of the STADZT 

      Autor: Turoň , Václav
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)
      This paper deals with the new time-frequency Short-Time Approximated Discrete Zolotarev Transform (STADZT), which is based on symmetrical Zolotarev polynomials. Due to the special properties of these polynomials, STADZT ...

    • A Study of the Properties of Electrical Insulation Oils and of the Components of Natural Oils 

      Autor: Spohner , Milan
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)
      This paper presents a study of the electrical and non-electrical properties of insulating oils. For the correct choice of an electrical insulation oil, it is necessary to know its density, dynamic viscosity, dielectric ...

    • A SUPERINTEGRABLE MODEL WITH REFLECTIONS ON S^3 AND THE RANK TWO BANNAI-ITO ALGEBRA 

      Autor: De Bie , Hendrik; Genest Xavier, Vincent; Lemay , Jean-Michel; Vinet , Luc
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2016)
      A quantum superintegrable model with reflections on the three-sphere is presented. Its symmetry algebra is identified with the rank-two Bannai-Ito algebra. It is shown that the Hamiltonian of the system can be constructed ...

    • A SYSTEM AND A DEVICE FOR ISOLATING CIRCULATING TUMOR CELLS FROM THE PERIPHERAL BLOOD IN VIVO 

      Autor: Mego , Michal; Kocifaj , Miroslav; Kundracik , František
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2015)
      Circulating tumor cells (CTC) play a crucial role in disseminating tumors and in the metastatic cascade. CTCs are found only in small numbers, and the limited amount of isolated CTCs makes it impossible to characterize ...

    • A Task-driven Grammar Refactoring Algorithm 

      Autor: Halupka , Ivan; Kollár , Ján; Pietriková , Emília
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)
      This paper presents our proposal and the implementation of an algorithm for automated refactoring of context-free grammars. Rather than operating under some domain-specific task, in our approach refactoring is perfomed on ...

    • A Thermogravimetric Study of the Behaviour of Biomass Blends During Combustion 

      Autor: Jiříček , Ivo; Rudasová , Pavla; Žemlová , Tereza
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)
      The ignition and combustion behavior of biomass and biomass blends under typical heating conditions were investigated. Thermogravimetric analyses were performed on stalk and woody biomass, alone and blended with various ...

    • A Way to Use Waste Heat to Generate Thermoelectric Power 

      Autor: Brázdil , Marian; Pospíšil , Jiří
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)
      In recent years there has been rising interest in thermoelectric generation as a potential source of electric power using waste heat. This paper describes thermoelectric power generation from waste heat from biomass boilers, ...

    • About the time evolution of coherent electron states in monolayers of boron allotropes 

      Autor: Díaz-Bautista, Erik
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)
      In this paper, we theoretically analyze the massless Dirac fermion dynamics in twodimensional monolayers of boron allotropes, 8B and 2BH − pmmn borophene, interacting with external electric and magnetic fields. We study ...

    • ABOUT THE UNIFORMITY AND THE STABILITY OF A VOLUME DISCHARGE IN HELIUM IN NEAR-ATMOSPHERIC PRESSURE 

      Autor: Kurbanismailov Suliymanovich, Vali; Omarov Alievich, Omar; Ragimkhanov Balaglanovich, Gadjimirza; Aliverdiev Alexandrovich, Abutrab
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2015)
      We present experimental electric and time-spatial characteristics of a volume discharge and of the transition from a volume burning stage into a channel mode nearing atmospheric pressure. We show that the discharge uniformity ...