Now showing items 1965-1984 of 2084

  • Ultrasonic NDT determination of initial and final setting time of cement paste 

    Misák, Petr; Kucharczyková, Barbara; Kocáb, Dalibor; Vymazal, Tomáš (EDP Sciences, 2020-03-05)
    There are several methods for determination of the setting and early hardening in the cementitious composites. The most common method is using the Vicat apparatus. The major disadvantage of this method is that it is invasive ...
  • Uncertainty Impact on Water Management Analysis of Open Water Reservoir 

    Marton, Daniel; Paseka, Stanislav (MDPI AG, 2017-02-04)
    The aim of this paper is to use a methodology to introduce uncertainty of hydrological and operational input data into mathematical models needed for the design and operation of reservoirs. The application of uncertainty ...
  • An unconventional rubber torsional vibration damper with two degrees of freedom 

    Píštěk, Václav; Kučera, Pavel; Kravchenko, Kostiantyn; Svída, David (JVE International, 2017-09-27)
    Rubber torsional dampers with one degree of freedom are a long-time proven tool for vibration damping in crank mechanisms, especially for passenger cars. Their advantages include, in particular, a relatively simple design ...
  • Under Sleeper Pads in Switches & Crossings 

    Plášek, Otto; Hruzíková, Miroslava (IOP PUBLISHING LTD, DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND, 2017-09-21)
    Under sleeper pads (USPs) have been installed in the Czech railway lines since 2007 into two trial sections in switches and crossings and in a trial section with the aim to reduce rail pitch corrugation. The basic motivation ...
  • Understanding the edge crack phenomenon in ceramic laminates 

    Ševeček, Oldřich; Kotoul, Michal; Leguillon, Dominique; Martin, Éric; Bermejo, Raul (Gruppo Italiano Frattura, 2015-10-05)
    In this work, a 2D parametric finite element model has been developed to predict the onset and propagation of an edge crack in ceramic laminates using a coupled stress-energy criterion. This approach states that a crack ...
  • Unemployment Effects of Greenfield and Brownfield Investments in Post-transition European Union Members 

    Bayar, Yilmaz; Remeikiene, Rita; Žufan, Jan; Novotný, Miloslav (Technická univerzita v Liberci, 2020-10-08)
    International direct and portfolio investments have gone up considerably as of mid-1980s. The foreign direct investments with characteristic of long term horizon may affect the economic variables through know-how and ...
  • Universal Voltage Conveyor and its Novel Dual-Output Fully-Cascadable VM APF Application 

    Herencsár, Norbert; Koton, Jaroslav; Hanák, Pavel (MDPI, 2017-03-20)
    This letter presents a novel realization of a voltage-mode (VM) first-order all-pass filter (APF) with attractive features. The proposed circuit employs a single readily available six-terminal active device called as ...
  • Unsteadiness in Effervescent Sprays: a New Evaluation Method and the Influence of Operational Conditions 

    Jedelský, Jan; Jícha, Miroslav (Begell House, 2008-01-01)
    A new evaluation method of unsteadiness of the spray generated by an effervescent atomizer is presented. The method is based on measurements of pressure fluctuations in the atomizer mixing chamber. Measurements, made under ...
  • Urban Commuting and Daytime Population In Small Areas of a Metropolis: A Case Study of Brno, Czech Republic 

    Akkerman, Abraham; Kudrna, Jan; Apeltauer, Tomáš (University of Zagreb, Faculty of Transport and Traffic Sciences, 2009-06-18)
    A simplified modelling approach to urban commuting patterns is achieved by focusing on daytime populations ratherthan on commuters, or on the commuting process itself.
  • Urban Road Infrastructure Maintenance Planning with Application of Neural Networks 

    Marović, Ivan; Androjić, Ivica; Jajac, Nikša; Hanák, Tomáš (Hindawi, 2018-06-04)
    The maintenance planning within the urban road infrastructure management is a complex problem from both the management and technoeconomic aspects. The focus of this research is on decision-making processes related to the ...
  • urbanistický kit / přisvoj si město 

    Stříteský, Pavel; Novák, Jakub; Palacký, Jiří (Vysoké učení technické v Brně - Fakulta architektury, 2015-02-05)
    Příručka dokumentující integrovaný způsob navrhování přenosného prvku městského mobiliáře na základě poznatků z oblasti taktického urbanismu a origamické architektury.
  • Usability of alternative admixtures for the production of blended cements 

    Sklenářová, Dorothea; Dvořák, Karel; Gazdič, Dominik; Hladík, Václav (IOP Publishing, 2018-07-16)
    This paper studies how pozzolan materials can be mechanically activated. For this, two major grinding technologies and different types of artificial pozzolans, such as red brick dust, granulated blastfurnace slag and sheet ...
  • Usage of Reclaimed Asphalt Material in Stone Mastic Asphalt 

    Hýzl, Petr; Dašek, Ondřej; Coufalíková, Iva; Varaus, Michal; Stehlík, Dušan (Hindawi, 2019-08-04)
    The paper focuses on the issue of using reclaimed asphalt in asphalt mixtures used for highly traffic-loaded asphalt pavements - in asphalt mixtures of the stone mastic asphalt (SMA) type. It is a skeleton-type mixture, ...
  • The Use of Acoustic Emission Method for Diagnosis of Damage of Pneumatic Cylinders 

    Mazal, Pavel; Vlašic, František; Mahmoud, Houssam (German Society for NDT, 2016-06-13)
    The paper presents the latest results obtained in the course of the project Technology Agency of the Czech Republic, which aims to create a new diagnostic system for checking the function of pneumatic cylinders using ...
  • Use of adsorption for pesticides removal from drinking water sources 

    Biela, Renata; Lukášová, Daniela; Gottwald, Martin (IOP Publishing, 2020-02-07)
    Pesticides can get in drinking water sources above all by means of agricultural activities, and they can negatively affect not only the environment but also our health. Adsorption is one of the water treatment processes ...
  • Use of EMW radiation in the building industry at defects in buildings 

    Sobotka, Jindřich; Smolka, Radim (MATEC Web of Conferences, 8th International Scientific Conference Building Defects (Building Defects 2016), 2016-12-22)
    This paper discusses theory and application of microwave radiation and experimental optimization of microwave radiation to eliminate moisture content in wood elements. It will be appreciated that the rising moisture leaking ...
  • The Use of Financial and Nonfinancial Measures within Innovation Management Control: Experience and Research 

    Žižlavský, Ondřej (Centre of Sociological Research, 2016-12-30)
    The paper deals with issue of innovation performance measurement and management control and takes as its starting point the current state of affairs and the specific conditions arising from today’s business environment. ...
  • The use of fractionated Kraft lignin to improve the mechanical and biological properties of PVA-based scaffolds 

    Rejmontová, Petra; Kovalčík, Adriána; Humpolíček, Petr; Capáková, Zdenka; Wrzecionko, Erik; Sáha, Petr (The Royal Society of Chemistry, 2019-04-23)
    The mechanical properties of poly(vinyl alcohol) (PVA)-based scaffolds were successfully improved. The improvements in mechanical properties correlated with the amount of Kraft lignin in PVA matrices. The critical property ...
  • The Use of Functional Differential Equations in the Model of the Meat Market with Supply Delay 

    Novotná, Veronika; Bobalová, Martina (Elsevier, 2015-12-01)
    In economic applications, we have to make the assumption that relations between the variables vary with time. One of the possible ways of incorporating the process dynamics into the model is to describe the model by ...
  • Use of Genetic Algorithms in Economic Decision Making Processes 

    Novotná, Veronika; Luhan, Jan; Budík, Jan (Česká společnost pro systémovou integraci, 2011-05-13)
    The article deals with the use of genetic algorithms in economic decision-making processes and focuses on the system of designing an investment portfolio. The application part shows a case study in which an investment ...