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Collection's Items (Sorted by Submit Date in Descending order): 1 to 20 of 30
Justa, Josef , Šmídl, Václav , Hamáček, Aleš
Deep Learning Methods for Speed Estimation of Bipedal Motion from Wearable IMU Sensors

The estimation of the speed of human motion from wearable IMU sensors is required in applications such as pedestrian dead reckoning. In this paper, we test deep learning methods for the prediction of the motion speed from raw readings of a low-cost IMU sensor. Each subjec...

Hornak, Jaroslav , Kadlec, Petr , Kopřiva, Jiří , Polanský, Radek
Dielectric, structural and mechanical properties of thermally aged biaxially oriented polymeric substrates for flexible electronics

Two materials, polyethylene naphthalate (PEN) and polyethylene terephthalate (PET), which are often used as flexible substrates for electronics, were exposed to accelerated thermal aging at temperatures of 190 °C and 210 °C for 50 0 0 and 20 0 0 h, respectively. Changes in the...

Štulík, Jiří , Šlauf, Josef , Polanský, Radek , Mergl, Martin , Kalbáč, Martin
Highly Sensitive Room-Temperature Ammonia Sensors Based on Single-Wall Carbon Nanotubes Modified by PEDOT

An ammonia gas sensor material based on sulfonic functionalized single-wall carbon nanotubesmodified by poly(3,4-ethylenedioxythiophene), namely, PEDOT/SWCNTSO3H, was prepared via in situ polymerization. A thin active layer of PEDOT/SWCNT-SO3H was deposited on a polyimide substrate with interdigital electr...

Blecha, Tomáš , Smítka, Václav , Bodnár, Michal , Štulík, Jiří
Simultaneous detection of NH3 and N02 by modified impedance spectroscopy in sensors based on carbon nanotubes

There are many gaseous substances that need to be monitored for possible damage to health or the environrnent. This requires many sensors. The solution to reducing the number of sensors is to use one sensor to detect several gaseous substances simultaneously. Efforts to simplify&#x...

Hlína, Jiří , Řeboun, Jan , Šimonovský, Marek , Syrový, Tomáš , Janda, Martin , Hamáček, Aleš
Study of new nitrogen-fireable copper-nickel thick film paste formulation compatible with thick printed copper

This paper is focused on a new copper-nickel thick film resistive paste which was designed and experimentally developed for the realization of low-ohmic power resistors. This copper-nickel paste has been designed for use in combination with thick printed copper conductors and in compari...

Hirman, Martin , Navrátil, Jiří , Radouchová, Michaela , Štulík, Jiří , Soukup, Radek
Influence of sweat on joint and sensor reliability of E-textiles

This article addresses reliability under the sweat of interconnection techniques for the mounting surface mounted device (SMD) components and fully printed humidity sensors onto conductive stretchable textile ribbons. Samples underwent testing for the effect of ageing by artificial sweat on their...

Švarný, Jiří , Chládek, Svatoslav
Model-based bias controller for a Mach-Zehnder intensity modulator

A new dither technique is presented to control the bias voltage of an intensity modulator of the Mach-Zehnder type to maintain the quadrature operating point. This method is based on the direct calculation of the operating point deviation. The calculation uses an exactmathematicalmodel&...

Pospíšil, Jan , Zmeškal, Oldřich , Nešpůrek, Stanislav , Krajčovič, Jozef , Weiter, Martin , Kovalenko, Alexander
Density of bulk trap states of hybrid lead halide perovskite single crystals: temperature modulated space-charge-limited-currents

Temperature-modulated space-charge-limited-current spectroscopy (tMsCLC) is applied to quantitatively evaluate the density of trap states in the band-gap with high energy resolution of semiconducting hybrid lead halide perovskite single crystals. Interestingly multicomponent deep trap states were observed in th...

Nešpůrek, Stanislav , Kuberský, Petr , Polanský, Radek , Trchová, Miroslava , Šebera, Jakub , Sychrovský, Vladimír
Raman spectroscopy and DFT calculations of PEDOT:PSS in a dipolar field

The conductive polymer-electrolyte interface plays an important role in many electrochemical devices. An unusual situation arises when a solvent-free ionic liquid (SF-IL) is used as the electrolyte because it behaves as a molten salt rather than an electrolyte solution. On the basis of&...

Hornak, Jaroslav
Synthesis, properties, and selected technical applications of magnesium oxide nanoparticles: a review

In the last few decades, there has been a trend involving the use of nanoscale fillers in a variety of applications. Significant improvements have been achieved in the areas of their preparation and further applications (e.g., in industry, agriculture, and medicine). One of these&#...

Hlína, Jiří , Řeboun, Jan , Hamáček, Aleš
Study of copper-nickel nanoparticle resistive ink compatible with printed copper films for power electronics applications

This paper is focused on copper–nickel nanoparticle resistive inks compatible with thick printed copper (TPC) technology, which can be used for power substrate manufacturing instead of conventional metallization techniques. Two types of copper–nickel inks were prepared and deposited by Aerosol Je...

Kalaš, David , Šíma, Karel , Kadlec, Petr , Polanský, Radek , Soukup, Radek , Řeboun, Jan , Hamáček, Aleš
FFF 3D printing in electronic applications: Dielectric and thermal properties of selected polymers

The present study is a focused and comprehensive analysis of the dielectric and thermal properties of twenty-four 3D printed polymers suitable for fused filament fabrication (FFF) in electronic applications. The selected polymers include various thermoplastic elastomers, such as thermoplastics based&#...

Kurzweil, Peter , Schell, Christian , Haller, Rainer , Trnka, Pavel , Hornak, Jaroslav
Environmental impact and aging properties of natural and synthetic transformer oils under electrical stress conditions

Against the background of environmental compatibility and unrestricted technical usability, synthetic, and natural transformer oils are critically compared in long-term tests under high voltage using electrical and instrumental analytical methods. Synthetic alkyl esters of pentaerythrol appear to be sustai...

Kozák, Ondřej , Pihera, Josef
Partial discharge analysis and simulation using the consecutive pulses correlation method

The behaviour of partial discharge as consequences of an alternating current (AC) is already well defined. AC partial discharges have completely different behaviour, background physics and parameters than partial discharges (PD) under direct current (DC) stress. This paper focuses on the mos...

Kúdelčík, Jozef , Hardoň, Štefan , Hockicko, Peter , Kúdelčíková, Mária , Hornak, Jaroslav , Prosr, Pavel , Trnka, Pavel
Study of the complex permittivity of a polyurethane matrix modified by nanoparticles

This study presents the influence of various types of nanoparticle (NP) fillers incorporated into a polyurethane (PU) (VUKOL 022) matrix and its subsequent changes in complex permittivity. Two types of surface modification of SiO2 fillers were investigated. The frequency dependence of the&#x...

Torres, Andre , Kovařík, Karel , Markovič, Tomáš , Adámek, Jiří , Duraň, Ivan , Ellis, Robert , Jeřáb, Martin , Řeboun, Jan , Turjanica, Pavel , Weinzettl, Vladimír , Fernandes, Horacio
Test bench for calibration of magnetic field sensor prototypes for COMPASS-u tokamak

Magnetic field sensors are fundamental for control and physics exploitation of fusion devices. Their inductive nature implies high dynamic ranges and a broad bandwidth, thus a precise characterization and calibration of these probes is paramount. COMPASS-U will have a completely new set ...

Vondráček, Petr , Pánek, Radomír , Hron, Martin , Havlíček, Josef , Weinzettl, Vladimír , Todd, Thomas Noel , Tskhakaya, David D. , Cunningham, Geoffrey , Háček, Pavel , Hromádka, Jakub , Junek, Pavel , Krbec, Jaroslav , Patel, Nisarg , Šesták, David , Varju, Jozef , Adámek, Jiří , Balázsová, Monika , Balner, Vojtěch , Bartoň, Petr , Bielecki, Jakub , Bílková, Petra , BŁocki, Jacek , Bocian, Dariusz , Bogár, Klara , Bogár, Ondřej , Boocz, Pavel , Borodkina, I. E. , Brooks, Arthur B. , Böhm, Petr , Burant, Jiří , Casolari, Andrea , Cavalier, Jordan , Chappuis, Phillippe , Dejarnac, Renaud , Dimitrova, Miglena , Dudák, Miloš , Ďuran, Ivan , Ellis, Robert A. , Entler, Slavomír , Fang, Jiarong , Farnik, Michal , Ficker, Ondřej , Fridrich, David , Fuková, Šárka , Gérardin, Jonathan , Hanák, Ivo , Havránek, Aleš , Herrmann, Albrecht , Horáček, Jan , Hronová, Olena , Imríšek, Martin , Isernia, Nicola , Jaulmes, Fabien , Jeřáb, Martin , Kindl, Vladimír , Komm, Michael , Kovařík, Karel , Kral, M. , Kripner, Lukáš , Macúšová, Eva , Majer, Tomáš , Markovič, Tomáš , Matveeva, Ekaterina , Mikszuta-Michalik, Katarzyna , Mohelnik, Martin , Mysiura, Illia , Naydenkova, D. I. , Němec, Ivan , Ortwein, Rafal , Patočka, Karel , Peterka, M. , Podolnik, A. , Procházka, F. , Převrátil, Jan , Řeboun, Jan , Scalerà, Valentino , Scholz, M. , Svoboda, J. , Świerblewski, Jacek , Šos, Miroslav , Tadros, Michael , Titus, Peter H. , Tomeš, Matěj , Torres, Andre , Tracz, Grzegorz , Turjanica, Pavel , Varavin, Mykyta , Veselovský, Viktor , Villone, Fabio , Wąchal, Przemysław , Yanovskiy, Vadim V. , Zadvitskiy, Georgiy V. , Zajac, Jaromír , Žák, Adam , Zaloga, Dobromil R. , Zelda, Jan , Zhang, Han
Preliminary design of the COMPASS upgrade tokamak

COMPASS Upgrade is a new medium size, high magnetic field tokamak (R = 0.9 m, Bt = 5 T, Ip = 2 MA) currently under design in the Czech Republic. It will provide unique capabilities for addressing some of the key challenges in plasma exhaust physics, advanced con...

Kuberský, Petr , Navrátil, Jiří , Syrový, Tomáš , Sedlák, Petr , Nešpůrek, Stanislav , Hamáček, Aleš
An electrochemical amperometric ethylene sensor with solid polymer electrolyte based on ionic liquid

An electrochemical amperometric ethylene sensor with solid polymer electrolyte (SPE) and semi-planar three electrode topology involving a working, pseudoreference, and counter electrode is presented. The polymer electrolyte is based on the ionic liquid 1-butyl 3-methylimidazolium bis(trifluoromethylsulfonyl)imide [B...

Kúdelčík, Jozef , Hardoň, Štefan , Trnka, Pavel , Michal, Ondřej , Hornak, Jaroslav
Dielectric responses of polyurethane/zinc oxide blends for dry-type cast cold-curing resin transformers

In recent years, numerous researches and studies confirm differences between Generations in their values, attitudes, or characteristics. However, the challenge is to get to know the Generation Z, whose individuals are currently entering the labor market for research and practical application....

Sedlák, Petr , Gajdoš, Adam , Macků, Robert , Majzner, Jiří , Holcman, Vladimír , Sedláková, Vlasta , Kuberský, Petr
The effect of thermal treatment on ac/dc conductivity and current fluctuations of PVDF/NMP/[EMIM] [TFSI] solid polymer electrolyte

The experimental study deals with the investigation of the effect of diverse crystallinity of imidazolium ionic-liquid-based SPE on conductivity and current fluctuations. The experimental study was carried out on samples consisting of [EMIM][TFSI] as ionic liquid, PVDF as a polymer matrix an...

Collection's Items (Sorted by Submit Date in Descending order): 1 to 20 of 30