Recent Submissions

  • HOMOGENIZATION OF TRANSPORT PROCESSES AND HYDRATION PHENOMENA IN FRESH CONCRETE 

    Author: Beneš , Michal; Štefan , Radek
    (České vysoké učení technické v PrazeCzech Technical University in Prague, 2020)
    The problem of hydration and transport processes in fresh concrete is strongly coupled and non- inear, and therefore, very difficult for a numerical modelling. Physically accurate results can be obtained using fine-scale ...
  • COMPLEXITY REDUCTION OF CYCLOSTATIONARY SENSING TECHNIQUE USING IMPROVED HYBRID SENSING METHOD 

    Author: Abdullah , Hikmat N.; Dawood , Zinah O.; Abdelkareem , Ammar E.; Abed , Hadeel S.
    (České vysoké učení technické v PrazeCzech Technical University in Prague, 2020)
    In cognitive radio system, the spectrum sensing has a major challenge in needing a sensing method, which has a high detection capability with reduced complexity. In this paper, a low-cost hybrid spectrum sensing method ...
  • THE EFFECT OF THE FILLING RATIO ON THE OPERATING CHARACTERISTICS OF AN INDIRECT DRUM DRYER 

    Author: Havlík , Jan; Dlouhý , Tomáš; Sabatini , Michel
    (České vysoké učení technické v PrazeCzech Technical University in Prague, 2020)
    This article investigates the effect of the filling ratio of the indirect rotary dryers on their operating characteristics. For moist biomass drying before combustion, the use of indirect drum dryers heated by a low pressure ...
  • NEURINGERROSEINWEIG MODEL BASED LONGITUDINALLY ROUGH POROUS CIRCULAR STEPPED PLATES IN THE EXISTENCE OF COUPLE STRESS 

    Author: Vashi , Yoginibahen Devendrasinh; Patel , Rakesh Manilal; Deheri , Gunamani Biswanath
    (České vysoké učení technické v PrazeCzech Technical University in Prague, 2020)
    This study intents to scrutinize the impact of ferrofluid in the presence of couple stress for longitudinally rough porous circular stepped plates. The influence of longitudinal surface roughness is developed using the ...
  • INFLUENCE OF CHEMICAL POLYMER ADDITIVE ON THE PHYSICAL AND MECHANICAL PROPERTIES OF EXPANDED POLYSTYRENE CONCRETE 

    Author: Wasiu , John; Baba , Daoud Mohammad
    (České vysoké učení technické v PrazeCzech Technical University in Prague, 2020)
    This research investigated the effect of Renolith chemical polymer additive (RCPA) on the properties of expanded polystyrene (ESP) concrete. Renolith chemical additive is a polymer-based product in a liquid form made up ...
  • TESTING THE SUITABILITY OF THE EXTRUDED POLYSTYRENE STYRODUR APPLICATION IN THE TRACK SUBSTRUCTURE 

    Author: Ižvolt , Libor; Dobeš , Peter; Mečár , Martin
    (České vysoké učení technické v PrazeCzech Technical University in Prague, 2020)
    Extruded polystyrene (XPS) and its excellent thermal insulation properties have been known for over 60 years. Due to its thermal, mechanical, but also deformation properties, XPS has a universal application, not only in ...
  • OPTIMIZATION OF A SMALL SOLAR CHIMNEY 

    Author: Castro Silva , Janaina Oliveira; Maia , Cristiana Brasil
    (České vysoké učení technické v PrazeCzech Technical University in Prague, 2020)
    An optimization study to maximize the exergy efficiency of a small-scale solar chimney was carried out. Optimization variables include collector diameter (Dc), collector height (Hc), tower height (Ht), and tower diameter ...
  • DEFORMATION ANALYSIS OF LAYERED REINFORCED CONCRETE FOAM CONCRETE FLOOR SLABS 

    Author: Lytvyniak , Oksana
    (České vysoké učení technické v PrazeCzech Technical University in Prague, 2020)
    This article presents a theoretical study of a stress-strain state of layered reinforced concrete - foam concrete floor slabs (hereinafter called as the LRFCS), with the use of a deformation analysis. Compressive and tensile ...
  • ANALYSIS OF STATIC ANGLE OF REPOSE WITH RESPECT TO POWDER MATERIAL PROPERTIES 

    Author: Macho , Oliver; Demková , Karin; Gabrišová , Ľudmila; Čierny , Matúš; Mužíková , Jitka; Galbavá , Paulína; Nižnanská , Žofia; Blaško , Jaroslav; Peciar , Peter; Fekete , Roman; Peciar , Marián
    (České vysoké učení technické v PrazeCzech Technical University in Prague, 2020)
    This paper investigates the Angle of Repose (AoR) of powder materials with respect to their morphological and rheological properties. Glass beads, sand, flour and semolina of different particle sizes were used as the ...
  • HEAT TRANSFER ENHANCEMENT AND FRICTION IN DOUBLE PIPE HEAT EXCHANGER WITH VARIOUS NUMBER OF LONGITUDINAL GROOVE 

    Author: Sunu , Putu Wijaya; Anakottapary , Daud Simon; Suarta , I Made; Santosa , I Dewa Made Cipta; Suarsana , Ketut
    (České vysoké učení technické v PrazeCzech Technical University in Prague, 2020)
    It has been found out that heat exchangers with longitudinal grooves produce better heat transfer than those without longitudinal grooves. However, up to now, there have been few investigations and applications of longitudinal ...
  • THE INFLUENCE OF FRICTION STIR WELDED PROCESS PARAMETERS OF AA2519T62 ON JOINT QUALITY DEFINED BY NONDESTRUCTIVE LASER AMPLIFIED ULTRASONIC METHOD AND BY MICROSTRUCTURE ANALYSIS 

    Author: Kravcov , Alexander; Kosturek , Robert; Śnieżek , Lucjan; Kluczyński , Janusz; Franek , Ondřej; Morozov , Nikolaj; Maciejewski , Pawel
    (České vysoké učení technické v PrazeCzech Technical University in Prague, 2020)
    The presented research contains a description of a non-destructive laser ultrasound internal structure analysis of aluminium joints made by friction stir welding. In the research, four selected technological parameter ...
  • Newmark algorithm for dynamic analysis with Maxwell chain model 

    Author: Schmidt , Jaroslav; Janda , Tomáš; Zemanová , Alena; Zeman , Jan; Šejnoha , Michal
    (České vysoké učení technické v PrazeCzech Technical University in Prague, 2020)
    This paper investigates a time-stepping procedure of the Newmark type for dynamic analyses of viscoelastic structures characterized by a generalized Maxwell model. We depart from a scheme developed for a three-parameter ...
  • APPLICATION OF FMEA METHODOLOGY FOR CHECKING OF CONSTRUCTION´S PROJECT DOCUMENTATION AND DETERMINATION OF THE MOST RISK AREAS FOR CHECKING ACCORDING TO MEASURED DATA 

    Author: Tuháček , Martin; Franek , Ondřej; Svoboda , Pavel
    (České vysoké učení technické v PrazeCzech Technical University in Prague, 2020)
    The article deals with an innovative method designed to check project documentation of buildings at the design stage, specifically exploring the possibility to implement FMEA and PDCA methodologies. Based on performed ...
  • The Development of a New AdsorptionDesorption Device 

    Author: Gabrišová , Ľudmila; Peciar , Peter; Macho , Oliver; Juriga , Martin; Galbavá , Paulína; Nižnanská , Žofia; Kubinec , Róbert; Valent , Ivan; Peciar , Marián
    (České vysoké učení technické v PrazeCzech Technical University in Prague, 2020)
    The aim of this work was to construct a new adsorption-desorption device based on the principle of separation of volatile organic compounds, e.g., ethanol. As an adsorbent, it is possible to use granulated activated carbon ...
  • LASER ULTRASONIC MEASUREMENT OF MECHANICAL DECAY IN LIMESTONE CAUSED BY FREEZETHAW CYCLES 

    Author: Kravcov , Alexander; Franek , Ondřej; Morozov , Nikolaj; Kucewicz , Michał; Tomaszewski , Michał; Svoboda , Pavel; Baranowski , Paweł
    (České vysoké učení technické v PrazeCzech Technical University in Prague, 2020)
    In this article, an innovative new method of non-destructive testing for estimating the sensitivity of limestone is presented. An advantage of the laser ultrasonic structuroscopy method is the time and the quality, due to ...
  • A COMPARISON OF TWO MODAL ANALYSIS METHODS: AN IMPACT HAMMER VERSUS LASER VIBROMETRY 

    Author: Krejčí , Jakub; Beneš , Petr
    (České vysoké učení technické v PrazeCzech Technical University in Prague, 2020)
    This paper presents a comparative experimental-analytical study on the performance of Multi-Input Single-Output (MISO) and Single-Input Multi-Output (SIMO) techniques to identify the modal properties of a cantilever beam. ...
  • MODELING OF MATERIAL BALANCE FROM THE EXPERIMENTAL UCG 

    Author: Durdán , Milan; Terpák , Ján; Kačur , Ján; Laciak , Marek; Flegner , Patrik
    (České vysoké učení technické v PrazeCzech Technical University in Prague, 2020)
    The underground coal gasification is a continually evolving technology, which converts coal to calorific gas. There are many important parameters in this technology, which are difficult to measure. These parameters include ...
  • Some Properties of a Differential Sequence BAsed upon the KummerSchwarz Equation 

    Author: 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 ...
  • MICROSTRUCTURAL CHARACTERISTICS MECHANICAL AND WEAR BEHAVIOUR OF ALUMINIUMALLOYED DUCTILE IRONS SUBJECTED TO TWO AUSTEMPERING PROCESSES 

    Author: Adebayo , Abdullahi Olawale; Oyetunji , Akinlabi; Alaneme , Kenneth Kenayo
    (České vysoké učení technické v PrazeCzech Technical University in Prague, 2020)
    The effect of aluminium addition and austempering processes on the microstructures, mechanical and wear properties of rotary melting furnace processed ductile irons was investigated. Ductile irons containing 1−4 wt.% Al ...
  • USING TEXTILE ARAMID FABRICS TO INCREASE THE BALLISTIC RESISTANCE OF ULTRAHIGHPERFORMANCE STEELFIBRE REINFORCED CONCRETE 

    Author: Mára , Michal; Sovják , Radoslav; Fornůsek , Jindřich
    (České vysoké učení technické v PrazeCzech Technical University in Prague, 2020)
    Thin plates made of Ultra-High-Performance Steel-Fibre-Reinforced Concrete (UHPSFRC) with textile Aramid fabrics were subjected to a projectile impact and its post-test damage was discussed. The damage degrees were the ...

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