Recent Submissions

  • Optical Amplifiers for Access and Passive Optical Networks: A Tutorial 

    Horváth, Tomáš; Radil, Jan; Münster, Petr; Bao, Ning-Hai (MDPI, 2020-08-26)
    For many years, passive optical networks (PONs) have received a considerable amount of attention regarding their potential for providing broadband connectivity, especially in remote areas, to enable better life conditions ...
  • PROGRAM PROCESSING DATABASE DATA FOR CALCULATION OF SPECTRAL LINES WIDTH AND SHIFT IN PLASMA 

    Pokorný, Josef (ČVUT, 2017-09-04)
    Electric and magnetic fields cause splitting of energy levels in an atom. Transition of electrons among these levels could be seen as broadening and shift of spectral lines. We recognize various types of effects, the most ...
  • Structure–Properties Relationship of Electrospun PVDF fibers 

    Částková, Klára; Kaštyl, Jaroslav; Sobola, Dinara; Petruš, Josef; Šťastná, Eva; Říha, David; Tofel, Pavel (MDPI, 2020-06-23)
    Electrospinning as a versatile technique producing nanofibers was employed to study the influence of the processing parameters and chemical and physical parameters of solutions on poly(vinylidene fluoride) (PVDF) fibers’ ...
  • Polyphenolic profile and biological activity of Chinese Hawthorn (Crataegus pinnatifida BUNGE) fruits 

    Juříková, Tunde; Sochor, Jiří; Rop, Otakar; Mlček, Jiří; Balla, Štefan; Szekeres, Ladislav; Adam, Vojtěch; Kizek, René (MDPI, 2012-12-01)
    Chinese hawthorn (Crataegus pinnatifida Bge.) fruits are rich in polyphenols (e.g., epicatechin, procyanidin B2, procyanidin B5, procyanidin C1, hyperoside, isoquercitrin and chlorogenic acid)-active compounds that exert ...
  • Passive Optical Networks Progress: A Tutorial 

    Horváth, Tomáš; Münster, Petr; Oujezský, Václav; Bao, Ning-Hai (MDPI, 2020-07-01)
    For many years, passive optical networks (PONs) have received a considerable amount of attraction regarding their potential for providing broadband connectivity to almost every citizen, especially in remote areas where ...
  • Coupled Numerical Model of Vibration-Based Harvester 

    Zukal, Jiří; Fiala, Pavel; Szabó, Zoltán; Dědková, Jarmila; Pernica, Roman (MDPI, 2020-04-15)
    Herein, the authors publish the complex design of a numerical coupled model of a vibration-based harvester that transforms mechanical vibrations into electric energy. A numerical model is based on usage of the finite element ...
  • UV-Induced Nanoparticles-Formation, Properties and Their Potential Role in Origin of Life 

    Nejdl, Lukáš; Zemánková, Kristýna; Havlíková, Martina; Burešová, Michaela; Hynek, David; Xhaxhiu, Kledi; Mravec, Filip; Matoušková, Martina; Adam, Vojtěch; Ferus, Martin; Kapuš, Jakub; Vaculovičová, Markéta (MDPI, 2020-08-04)
    Inorganic nanoparticles might have played a vital role in the transition from inorganic chemistry to self-sustaining living systems. Such transition may have been triggered or controlled by processes requiring not only ...
  • New Low-Voltage CMOS Differential Difference Amplifier (DDA) and an Application Example 

    Šotner, Roman; Herencsár, Norbert; Kledrowetz, Vilém; Kartci, Aslihan; Jeřábek, Jan (IEEE, 2018-08-05)
    The paper presents a newly designed structure of a low-voltage differential difference amplifier (DDA). The novel implementation brings significant reduction of complexity in comparison to readily available operational ...
  • Memristor Emulator Applications Using the MOS-Only Technique 

    Metin, Bilgin; Herencsár, Norbert; Cicekoglu, Oguzhan (IEEE, 2018-08-05)
    The aim of this paper is to present a work towards a MOS transistor memristor emulator. The starting circuit employs an opamp, negative capacitors and loaded with a nonlinear resistor. The final aim is to design a memristor ...
  • Spectral Super-resolution and Band-limited Extrapolation Using Slepian Series 

    Mihálik, Ondrej; Michalík, David; Jura, Pavel; Fiedler, Petr (IFAC, 2019-10-29)
    Band-limited signal extrapolation and spectral super-resolutions are closely related. They both can be achieved using Slepian series. This method is often believed to be dependent on computing definite integrals. Instead ...
  • Frequency Corrector Using Voltage Differencing Current Conveyor Transconductance Amplifiers 

    Šotner, Roman; Petržela, Jiří; Jeřábek, Jan; Langhammer, Lukáš (IEEE, 2019-11-29)
    This paper brings new type of electronically adjustable bilinear two port (allowing zero, pole and gain adjustment) applied in simple two-band frequency corrector. The bilinear two port employs single current controlled ...
  • Experimental Verification of a Fractional-Order Wien Oscillator Built Using Solid-State Capacitors 

    Kartci, Aslihan; Agambayev, Agamyrat; Hassan, Ali H.; Bagci, Hakan; Salama, Khaled Nabil (IEEE, 2018-08-05)
    A new type of fractional-order capacitors (FOCs) is fabricated using a molybdenum disulfide (MoS2)-ferroelectric polymer composite. The phase angle of this FOC’s impedance remains constant between 100 Hz and 10MHz with ...
  • All-Pass Time Delay Circuit Magnitude Response Optimization Using Fractional-Order Capacitor 

    Herencsár, Norbert; Kartci, Aslihan; Tlelo-Cuautle, Esteban; Metin, Bilgin; Cicekoglu, Oguzhan (IEEE, 2018-08-05)
    Paper presents the integer- and fractional-order cases of a voltage-mode all-pass time delay circuit, or more frequently called as all-pass filter, employing a single negative-type current-controlled current inverting ...
  • CMOS-RC Colpitts Oscillator Design Using Floating Fractional-Order Inductance Simulator 

    Kartci, Aslihan; Herencsár, Norbert; Brančík, Lubomír; Salama, Khaled Nabil (IEEE, 2018-08-05)
    This paper deals with CMOS fractional-order inductance (FoL) simulator design and its utilization in 2.75th-order Colpitts oscillator providing high frequency of oscillation. The proposed floating FoL is composed of two ...
  • Gabor frames and deep scattering networks in audio processing 

    Bammer, Roswitha; Dörfler, Monika; Harár, Pavol (MDPI, 2019-09-26)
    This paper introduces Gabor scattering, a feature extractor based on Gabor frames and Mallat's scattering transform. By using a simple signal model for audio signals specific properties of Gabor scattering are studied. It ...
  • Lasers in Passive Optical Networks and the Activation Process of an End Unit: A Tutorial 

    Horváth, Tomáš; Münster, Petr; Bao, Ning-Hai (MDPI, 2020-07-09)
    It is 21 years since the first passive optical network (PON) was standardized as an asynchronous transfer mode passive optical network (APON) with same optical distribution network scheme as we know in current networks. A ...
  • From Integration Profiles to Interoperability Testing for Smart Energy Systems at Connectathon Energy 

    Gottschalk, Marion; Gerald, Gerald; Frohner, Matthias; Paštěka, Richard; Uslar, Mathias (MDPI, 2018-10-28)
    The project Integrating the Energy System (IES) Austria recognises interoperability as key enabler for the deployment of smart energy systems. Interoperability is covered in the Strategic Energy Technology Plan (SET-Plan) ...
  • Conversion of a MISO Filter into its Reconnectionless Reconfigurable Form with Complex Active elements 

    Langhammer, Lukáš; Šotner, Roman (IEEE, 2020-04-23)
    This paper aims to show an easy way how to design a reconnection-less reconfigurable filter based on the modification of an existing MISO filter. The proposed filter offers the same transfer functions as the structure ...
  • Konstrukční výzkum ve vzdělávání 

    Ellederová, Eva (Česká pedagogická společnost o.s., 2017-09-30)
    Cílem této studie je vymezit pojetí konstrukčního výzkumu ve vzdělávání jako výzkumného designu, který klade důraz na vývoj řešení komplexních problémů v pedagogické praxi a na vývoj či validaci teorií o vzdělávacích ...
  • A 1 V 92 dB SNDR 10 kHz Bandwidth Second-Order Asynchronous Delta-Sigma Modulator for Biomedical Signal Processing 

    Kledrowetz, Vilém; Fujcik, Lukáš; Prokop, Roman; Háze, Jiří (MDPI, 2020-07-25)
    In this paper, a second-order asynchronous delta-sigma modulator (ADSM) is proposed based on the active-RCintegrators. The ADSM is implemented in the 0.18 µ m CMOS Logic or Mixed-Signal/RF, General Purpose process from the ...

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