Články / Articles (RICE) Collection home page

Browse
Subscribe to this collection to receive daily e-mail notification of new additions RSS Feed RSS Feed RSS Feed
Collection's Items (Sorted by Submit Date in Descending order): 1 to 20 of 31
Syrový, Tomáš , Maronová, Stanislava , Kuberský, Petr , Ehman, Nanci Vanesa , Vallejos, María E. , Pretl, Silvan , Felissia, Fernando E. , Area, María Cristina , Chinga-Carrasco, Gary
Wide range humidity sensors printed on biocomposite films of cellulose nanofibril and poly(ethylene glycol)

Cellulose nanofibril (CNF) films were prepared from side streams generated by the sugarcane industry, that is, bagasse. Two fractionation processes were utilized for comparison purposes: (1) soda and (2) hot water and soda pretreatments. 2,2,6,6‐Tetramethylpiperidinyl‐1‐oxyl‐mediated oxidation was applied ...

Trnka, Pavel , Trnková, Magdaléna
Správa aktiv a potřeba diagnostiky v Průmyslu 4.0

High demands on the economy of the power grids operation press the operators of electrical machinery and equipment to invest effectively to the management of the machines operation, maintenance, and renewal. At present, a number of concepts of management of important electrical machines...

Kindl, Vladimír , Byrtus, Miroslav , Skala, Bohumil , Kůs, Václav
Key assembling issues relating to mechanical vibration of fabricated rotor of large induction machines

In many applications, where rotating machines of high power are used, high demands on reliability and safety are laid. Precise manufacturing procedures has to be kept even in case of machines retrofits when e.g. rotors are newly assembled. Even small inaccuracies or misguiding the&...

Dániel, Vladimír , Inneman, Adolf , Veřtát, Ivo , Báča, Tomáš , Nentvich, Ondřej , Urban, Martin , Stehlíková, Veronika , Sieger, Ladislav , Skala, Petr , Filgas, Robert , Zadražil, Vojtěch , Linhart, Richard , Masopust, Jiří , Jamroz, Tomáš , Pína, Ladislav , Maršíková, Veronika , Mikuličková, Lenka , Belas, Eduard , Pospíšil, Stanislav , Vykydal, Zdeněk , Mora, Yesid , Pavlica, Richard
In-orbit commissioning of Czech nanosatellite VZLUSAT-1 for the QB50 mission with a demonstrator of a miniaturised lobster-eye X-ray telescope and radiation shielding composite materials

This paper presents the results of in-orbit commissioning of the first Czech technological CubeSat satellite of VZLUSAT-1. The 2U nanosatellite was designed and built during the 2013 to 2016 period. It was successfully launched into Low Earth Orbit of 505km altitude on June 23,...

Franc, Jiří , Pechánek, Roman , Kindl, Vladimír , Zavřel, Martin
Ventilation system with skewed rotor cooling ducts of 40-MW synchronous machine: a case study

This paper describes modified ventilation system and thermal analysis of low-power 40-MW turbo generator. The study compares thermal behaviour of the machine for three different arrangements of the rotor ventilation ducts. Variations of both the sub-slot and the radial ducts are analysed.&#x...

Mach, Pavel , Geczy, Attila , Polanský, Radek , Bušek, David
Glass transition temperature of nanoparticle-enhanced and environmentally stressed conductive adhesive materials for electronics assembly

In our paper, the characterization of glass transition temperature (Tg) was performed for one- and two-component electrically conductive adhesive used in electronic joining technologies. Both adhesives were of the epoxy type with the silver filler. Dynamic mechanical analysis (DMA) was used ...

Streit, Luboš , Talla, Jakub , Janda, Martin
Tram LC filter stabilization by Energy Storage system

The paper is focused on the tram input LC traction filter stabilization by the Energy Storage System. The input LC filter is almost undamped resonant circuit which is mainly excited by the motor constant torque command. The tram during voltage drops increases the current flow&...

Štork, Milan , Mayer, Daniel
Direct currents in power transformers

The article is devoted to the physical nature of geomagnetism, magnetic storms and methods of predicting their origin and deals with geomagnetic induced currents called GIC (Geomagnetically Induced Currents) and their effect on power transformers. A simplified, single-phase transmission system is...

Burian, Petr , Broulím, Pavel , Bergmann, Benedikt
Study of power consumption of Timepix3 detector

The Timepix3 readout chip - the latest member of the Medipix family of hybrid pixel detectors - brought several new functionalities in comparison with the older Timepix, i.e. a high hit-rate, a time granularity of 1.5625 ns, a data-driven readout scheme (with a per pixel ...

Burian, Petr , Broulím, Pavel , Bergmann, Benedikt , Georgiev, Vjačeslav , Pospíšil, Stanislav , Pušman, Lukáš , Zich, Jan
Timepix3 detector network at ATLAS experiment

We describe the technical design and show results of first measurements of a network based on the Timepix3 and the Katherine readout (with Gigabit Ethernet interface) installed in the ATLAS cavern in the LHC in January 2018. The network consists of four Timepix3 detectors, arr...

Kotlan, Václav , Hamar, Roman , Pánek, David , Doležel, Ivo
Model of depositing layer on cylindrical surface produced by induction-assisted laser cladding process

A model of hybrid cladding on a cylindrical surface is built and numerically solved. Heating of both substrate and the powder material to be deposited on its surface is realized by laser beam and preheating inductor. The task represents a hard-coupled electromagnetic-thermal problem...

Svoboda, Jiří , Horník, Vít , Stratil, Luděk , Hadraba, Hynek , Mašek, Bohuslav , Khalaj, Omid , Jirková, Hana
Microstructure Evolution in ODS Alloys with a High-Volume Fraction of Nano Oxides

Existing oxide dispersion strengthened (ODS) alloys are, besides Ni-based superalloy single crystals, the most creep-resistant materials. The creep resistance of the ODS alloys may, moreover, be significantly improved thanks to increasing the volume fraction of the nano oxides by more than o...

Nikolayev, Denys , Zhadobov, Maxim , Karban, Pavel , Sauleau, Ronan
Electromagnetic radiation efficiency of body-implanted devices

Autonomous wireless body-implanted devices for biotelemetry, telemedicine, and neural interfacing constitute an emerging technology providing powerful capabilities for medicine and clinical research. We study the through-tissue electromagnetic propagation mechanisms, derive the optimal frequency range, and obtain th...

Kepka, Miloslav , Kepka, Miloslav
Deterministic and probabilistic fatigue life calculations of a damaged welded joint in the construction of the trolleybus rear axle

In trolleybuses in service, fatigue cracks were frequently encountered in a welded structural detail in their rear axle housing. Sufficiently representative stress-time histories for the critical cross section through this part were obtained by measurement during rides with empty as well as&...

Farský, Jindřich , Zetek, Miroslav , Bakša, Tomáš , Adámek, Pavel
Geometrická přesnost obecné tvarové plochy po broušení na 5-ti osé brusce při změně řezných podmínek

This work deals with the comparison of the acquired geometric accuracy of values on the complex-shaped surface after grinding on the 5-axis grinding machine when changing the cutting conditions. The experiment is designed to include those input parameters that affect the abrasive proces...

Zetek, Miroslav , Zetková, Ivana , Kučerová, Ludmila , Kepka, Miloslav , Šimeček, Jiří , Černý, Ivo , Kec, Jan
Obrobitelnost konvenčního Inconelu 718 vs. 3D tištěného metodou DMLS při vrtání

Machinability is a technological characteristic expressing the aggregate influence of the physical, mechanical and chemical properties of the machined material on the course and on the economic or respectively, qualitative results of the cutting process. It can be evaluated as a qualitative,...

Farský, Jindřich , Bakša, Tomáš , Zetek, Miroslav , Adámek, Pavel
Vliv řezných podmínek při broušení nástrojové oceli VACO 180 na zatížení a opotřebení brousicího kotouče

This article deals with the evaluation of the size of the forces generated by the process of grinding and the size of wear on the grinding wheels when the cutting conditions are changed. Cutting speed and depth of cut most influence the wear of the grinding wheels&#x...

Kadlec, Petr , Polanský, Radek
Influence of UV radiation on dielectric absorption and dielectric strength of halloysite nanotubes filled polyethylene composites

This paper deals with the evaluation of the amount of filler influence and the ultraviolet (UV) radiation influence on selected dielectric properties of the innovative type of composites. These composites consist of a linear low-density polyethylene matrix and a clay filler (with differ...

Kotlan, Václav , Hamar, Roman , Šroubová, Lenka , Doležel, Ivo
Hybrid realization of fillet weld

Purpose: A model of hybrid fillet welding is built and solved. No additional material (welding rod, etc.) is used. Heating of the welded parts is realized by laser beam with induction preheating and/or postheating. The purpose of these operations is to reduce the temperature&#...

Hlína, Jiří , Řeboun, Jan , Heřmanský, Vojtěch , Šimonovský, Marek , Johan, Jan , Hamáček, Aleš
Study of co-fired multilayer structures based on Thick Printed Copper technology

This paper is focused on the study of co-fired multilayer structures realized by Thick Printed Copper (TPC) technology. TPC technology is used for the manufacturing of substrates for power applications and it enables simple manufacturing of multilayer structures. These structures usually con...

Collection's Items (Sorted by Submit Date in Descending order): 1 to 20 of 31