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Collection's Items (Sorted by Submit Date in Descending order): 1 to 20 of 70
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...

Hornak, Jaroslav , Kadlec, Petr , Polanský, Radek
Halloysite nanotubes as an additive to ensure enhanced characteristics of cold-curing epoxy resins under fire conditions

At present, the most commonly used electrical insulating materials, including cold-curing epoxy resins, are well designed for normal operating conditions. However, new generations of materials should also be capable of withstanding extreme emergency conditions, e.g., in case of fire. For this...

Hirman, M. , Navrátil, J. , Hamáček, A. , Steiner, F.
Mechanical Testing of Joints Glued/Soldered on Textile Ribbons

This paper deals with the assembly of SMD chip resistors onto a conductive textile ribbon by soldering or gluing. The main goal of our research was to verify the reliability of joints after jerk testing of ribbons. The results showed that soldered / glued joints on&#...

Trnka, Pavel , Hornak, Jaroslav , Prosr, Pavel , Michal, Ondřej , Wang, Feipeng
Various aging processes in a paper-natural ester insulation system in the presence of copper and moisture

This article adds more information to the problem of natural ester use as an electroinsulating uid in cellulose paper-oil systems, e.g., for use in power transformers. An accelerated thermal aging (120, 140 and 160 C) of samples consisting of cellulose paper (transformerboard), a t...

Sedlák, Petr , Kuberský, Petr
The effect of the orientation towards analyte flow on electrochemical sensor performance and current fluctuations

Analyte flow influences the performance of every gas sensor; thus, most of these sensors usually contain a diffusion barrier (layer, cover, inlet) that can prevent the negative impact of a sudden change of direction and/or the rate of analyte flow, as well as various unwa...

Polanský, Radek , Hahn, Pavel , Kadlec, Petr , Moravcová, Daniela , Prosr, Pavel
Quantifying the effect of catalysts on the lifetime of transformer oil

Hirman, Martin , Steiner, František
Optimization of apertures shapes in stencil for ECA printing to connecting of SMD components on PCBs

This paper deals with the influence of different apertures shape in stencil on mechanical shear strength, electrical resistance and insulation distance. In the experiment, the SMD chip components 0805 were assembled on flexible substrate by electrically conductive adhesives (MG 8331S, CA 315...

Menšík, Ladislav , Vik, Robert , Pretl, Silvan , Bělohoubek, Jan , Syrový, Tomáš , Syrová, Lucie , Kubáč, Lubomír , Menšík, Ladislav
Možnosti uplatnění internetu věcí (IoT) v precizním zemědělství v ČR

Digitization, modern technology (IoT), development of sensor technology and data processing in recent years it has started to promote also in the agricultural sector (crop, livestock production) in the Czech Republic Republic. The aim of the paper is to explain the general principles&#x...

Hornak, Jaroslav , Haller, Rainer , Kupka, Lukáš , Michal, Ondřej , Pihera, Josef
Inovativní postupy při diagnostice částečných výbojů při AC a DC napětí

Partial discharges are one of the most commonly occurring physical phenomena that can have a negative effect on the overall life of electrical equipment. The most basic types (besides surface and internal) are discharges occurring in places with a small radius of curvature. At ...

Tupa, Jiří , Steiner, František
Industry 4.0 and business process management

Production companies are adopting new methods for the improvement of their managing production processes. The cost, quality and time are still key important attributes for process improvement. This is reason why the Business Process Management (BPM) is the core of management in differen...

Hornak, Jaroslav , Mentlík, Václav , Trnka, Pavel , Šutta, Pavol
Synthesis and diagnostics of nanostructured micaless microcomposite as a prospective insulation material for rotating machines

This paper deals with the topic of composite insulation materials for rotating machines and it is primarily pointed to the synthesis of new three-component insulation system. In connection with this research, the basic components of the insulation system are selected and described by&#x...

Hlína, Jiří , Řeboun, Jan , Hamáček, Aleš
Study of copper thick film metallization on aluminum nitride

This paper is focused on the study of copper thick film metallization on AlN. The copper metallization was realized by Thick Printed Copper (TPC) technology. The copper films were printed with a new adhesion copper paste designed for both AlN and Al2O3 substrates. Scanning ele...

Polanský, Radek , Kadlec, Petr , Slepička, Petr , Kolská, Zdeňka , Švorčík, Václav
Testing the applicability of LDPE/HNT composites for cable core insulation

Composites prepared from low-density polyethylene (LDPE) and tubular halloysite nanotubes (HNTs) with different contents of HNTs were comprehensively tested. HNTs were utilized to suppress the intensity of heat release from the ignition of LDPE. The results revealed that the large polarity d...

Hlína, Jiří , Řeboun, Jan , Johan, Jan , Šimonovský, Marek , Hamáček, Aleš
Reliability of printed power resistor with thick-film copper terminals

This paper is focused on the thick-film power resistors with copper terminals. These terminals are created by the new Thick Printed Copper (TPC) technology. This technology is based on sequential screen printing and firing of copper paste in nitrogen atmosphere on an alumina substr...

Kostelanská, Marie , Freisleben, Jaroslav , Bačkovská Hanusová, Zdeňka , Moško, Tibor , Vik, Robert , Moravcová, Daniela , Hamáček, Aleš , Mosinger, Jiří , Holada, Karel
Optimization of the photodynamic inactivation of prions by a phthalocyanine photosensitizer: The crucial involvement of singlet oxygen

Prion disorders are fatal neurodegenerative diseases caused by the autocatalytic conversion of a natively occurring prion protein (PrPC) into its misfolded infectious form (PrPTSE). The proven resistance of PrPTSE to common disinfection procedures increases the risk of prion transmission in medic...

Voborník, Aleš , Veřtát, Ivo , Linhart, Richard
Experimental Electric Power System for Small Satellites with Independent Supply Channels

Small satellites such as CubeSats are not adequately protected in the cosmic environment from ionizing radiation due to the low weight limit, which does not allow the use of heavy shielding materials with the high atomic number. Therefore, the power supply system of such small...

Linhart, Richard , Voborník, Aleš , Veřtát, Ivo
Communication Subsystem for PilsenCUBE Nanosatellite

This paper presents a design concept of new radio communication subsystem, intended for use on the PilsenCUBE nanosatellite. The hardware and software solution is based on previous experiences with the VZLUSAT-1 setup and operation. Our aim is to overcome weak points which were fou...

Dudáček, Luděk , Voborník, Aleš , Masopust, Jiří
PilsenCUBE-II Measurement Board as interface for student’s experiments

One of the main goals of the PilsenCUBE-II picosatellite project is to offer on board payload space for the student's experiments for the students from the various secondary schools of the western Bohemia. The students experiments have to be simple enough in scope of skill...

Pistulková, Alena , Tupa, Jiří , Martinek, Lukáš
Implementace procesního řízení u poskytovatelů zdravotnických služeb

This papers deals with the possibilities of implementation of process management in health care facilities. Emphasis is placed on clarity, simplification of processes to a level that meets legislative and standardization requirements, but minimizes the administrative burden on health professionals.

Hirman, Martin , Navrátil, Jiří , Steiner, František , Džugan, Tomáš , Hamáček, Aleš
Alternative technology for SMD components connection by non‑conductive adhesive on a flexible substrate

This article deals with the assembly of SMD chip components onto a flexible substrate by using non-conductive adhesives. In the experiments, two electrically conductive adhesives (ECA) and two non-conductive adhesives (NCA) were used. The verification of the properties and usability of NCAs&...

Collection's Items (Sorted by Submit Date in Descending order): 1 to 20 of 70