2026-05-31
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XXVI Czech–Polish seminar: structural and ferroelectric phase transitions: book of abstracts and program
Pokorný, Jan ; Bubnov, Alexej ; Janovská, Marie
This is the Book of Abstracts for the XXVI Czech-Polish Seminar (CPSEM-2026) held in Milovy (Czech Republic) on May 4 8, 2026. The special objective of the conference is expressed in the conference subtitle: Structural and Ferroelectric Phase Transitions. The continuous worldwide interest to this conference series is proving that it has a respected position within the series of International/European conferences covering all interdisciplinary field of the research related to structural and ferroelectric phase transitions. At the CPSEM-2026 conference there were about 95 participants from 10 countries delivered 26 invited lectures and selected 21 contributed talks, 44 posters were presented during two poster sessions.
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2026-03-14
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Mechanical properties of cement composites with plasma-treated waste glass aggregate
Palička, A. ; Prošek, Z. ; Tesárek, P. ; Babčenko, Oleg
Presented research focuses on evaluating the effect of low-temperature plasma surface treatment of finely ground recycled glass on the mechanical properties of cement composites. Plasma treatment was employed to enhance the adhesion between glass particles and the cement matrix, thereby increasing the overall cohesion, strength, and resistance of the composite to environmental influences and degradation. The results indicated that plasma treatment, particularly with oxygen, led to a moderate improvement in mechanical properties compared to untreated samples, but the values did not reach the levels observed in the reference sample without glass powder.
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2026-02-14
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2026-02-14
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Energetická, ekonomická a kapacitní analýza procesu plazmového zplyňování
Mates, Tomáš ; Hostinský, Tomáš ; Pilař, Jakub ; Buryi, Maksym ; Vyskočil, J.
Na základě výpočtů vstupních a výstupních energii do uvažovaných dvou procesních konfigurací je srovnána energetická účinnost konvenčního spalování a nově navrhovaného vícestupňového zpracování nemocničního odpadu pomocí pyrolýzy a plazmatického zplyňování. Hodnoty účinnosti jsou pro oba způsoby přibližně srovnatelné, přičemž nový způsob přináší benefity ve formě bezpečnější likvidace odpadu za vyšších teplot při současném využití flexibilnějšího zdroje energie (elektřina) ve srovnání s konvenčním zemním plynem. Jsou popsány ekonomické aspekty obou způsobů a také rozvaha energetických a ekonomických parametrů při zvětšování kapacity daného provozu.
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2026-01-24
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Preparation and analysis of multilayer metal- dielectric systems by PVD methods
Lis, Jáchym ; Skočdopole, J. ; Bulíř, Jiří ; Kalvoda, L. ; Fekete, Ladislav
To develop the use of hydrogen technologies in the energy sector, it is necessary to ensure their safety by developing high-quality hydrogen sensors. In this work, two principles of optical sensors exploiting metal-dielectric interface phenomena in multilayer thin film structures are investigated, specifically the combination of a thin silver layer with a very thin palladium layer for excitation of the surface plasmon-polariton and the combination of silver, a dielectric intermediate layer and a very thin palladium layer for excitation of the waveguide mode. The samples were prepared by Magnetron Sputtering and Ionized Jet Deposition methods. The analysis of the samples was carried out using ellipsometry, Attenuated Total Reflection method, atomic force microscopy and computer simulations.
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2026-01-24
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Elektrochemická vizualizace otisku prstu nanesením polymerního filmu – CM VaVaI č.159
Festová, S. ; Broncová, G. ; Hlavín, P. ; Novotný, Michal
Vytvořená certifikovaná metodika zviditelnění daktyloskopických otisků je založena na depozici polymerního filmu poly(neutrální červeni) (PNR) na mosazné substráty – nábojnice/mince s naneseným daktyloskopickým otiskem za specifických podmínek daných optimalizací metody cyklické voltametrie v elektrochemické cele. Do cely jsou umístěny tři elektrody. Na pracovní elektrodu, kterou tvoří uchycená nábojnice/mince, je aplikován cyklicky měnící se potenciál v určitých potenciálových mezích tak, aby došlo k depozici (nanesení) filmu PNR na povrch nábojnice/mince a byl zviditelněn daktyloskopický otisk. Optimalizované parametry jsou potenciálové rozmezí –200 až 500 mV oproti referentní argentchloridové elektrodě, počet cyklů 5 až 8 a skenovací rychlost 50 mV/s.
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2025-12-15
16:33 |
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2025-12-15
16:33 |
ECLC2025: Book of Abstracts of the 17th European Conference on Liquid Crystals
Bubnov, Alexej ; Kohout, M. ; Novotná, Vladimíra
This is the Book of Abstracts for the 17th European Conference on Liquid Crystals (ECLC2025 conference) held in Prague (Czech Republic) on June 1-6, 2025. This is the major European conference on liquid crystals, self-assembled materials and related soft matt subjects. At the ECLC2025 conference there were about 200 participants from 30 countries delivered 4 plenary lectures, 28 invited lectures, 61 oral contributions, 12 short oral contributions: 93 posters were presented during two poster sessions.
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2025-08-31
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Comparison of Lu.sub.3./sub.Al.sub.5./sub.O.sub.12./sub.:Ce(Er) bulk and nano single crystals
John, David ; Volf, Jakub ; Bartosiewicz, Karol ; Horiai, T. ; Kamada, K. ; Yoshikawa, A. ; Remeš, Zdeněk ; Landová, Lucie ; Ledoux, G. ; Houel, J. ; Prokhorov, Andriy ; Buryi, M.
Lutetium aluminum garnet (LuAG) is a crystal well known for being extraordinarily useful for building highly efficient laser devices or ionizing radiation detectors. To design the most favourable physical properties, different dopants and synthesis methods are constantly developed, primarily focused on the advantages of single crystals. However, the downscaling of the luminescent materials to nanosize also creates additional benefits of increased surface to volume ratio and thus, the efficiency of luminescence or doping can be improved. Therefore, the aim of this work is to compare the single crystals and nanogarnets under the influence of Ce and Er doping. Optical properties of the garnet single crystals are very well known while the nanocrystals should have been studied first.
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2025-06-08
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Finite element analysis of nanoindentation pile-up and correction of projected contact area
Kovář, J. ; Fuis, V. ; Čtvrtlík, Radim ; Tomáštík, Jan
This paper deals with the pile-up phenomenon that can occur during nanoindentation. Finite Element (FE) simulation of X5CrNiCuNb16-4 steel nanoindentation with pyramidal Berkovich indenter was done, and stress and strain beneath the indenter leading to pile-up behavior were analyzed in detail. Pile-up also influences the projected contact area, which should be corrected to include the pile-up into the Oliver-Pharr analysis. Accurate calculation of the projected contact area requires knowledge of its boundary. Few methods of boundary approximation were used, including approximation by the triangle and the semi-ellipse. For more precise approximation, the expression for parabolical approximation was derived. These methods were compared with the projected contact area calculated by finite element method. The most precise results were obtained using semi-elliptical and parabolical correction, which can be used for the determination of the projected contact area and its boundary.
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