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    Prediktívna riadiaca stratégia hybridného vozidla pre pravidelne sa opakujúci režim dochádzania
    (Vysoké učení technické v Brně. Fakulta strojního inženýrství) Ušiak, Michal; Štětina, Josef; Malý, Miroslav; Danko, Ján
    Vplyvom sprísňujúcej sa emisnej legislatívy sú výrobcovia automobilov nútení znižovať produkciu emisií výfukových plynov automobilov. V dnešnej dobe sú najdiskutovanejšími práve emisie skleníkových plynov, ktoré je možné pri použití fosílnych palív znižovať len redukciou spotreby týchto palív. Tento cieľ je možné v prípade hybridných vozidiel dosiahnuť zefektívnením riadiacej logiky. V dizertačnej práci bola vytvorená riadiaca stratégia hybridných vozidiel založená na princípe konečného automatu s využitím metódy lokálnej optimalizácie, pričom jej cieľom bolo zefektívnenie riadiacej logiky hybridného vozidla pomocou predikcie jazdného profilu pravidelného dochádzania na základe už absolvovaných jázd po rovnakej trase. Aby bola prediktívna riadiaca stratégia aktivovaná len vo vhodnej dobe, bol vytvorený algoritmus pre identifikáciu vzoru opakovania sa jázd. Následnou adaptáciou existujúcej riadiacej logiky na základe predikovaného jazdného profilu je možné dosiahnuť redukciu spotreby paliva, a tým pádom aj zníženie produkcie emisií CO2. Na overenie vytvorenej riadiacej stratégie boli uskutočnené overovacie jazdy po predom určenom okruhu. Na základe týchto jázd bolo preukázané, že v prípade mild-hybridného vozidla dochádza vplyvom prediktívnej riadiacej stratégie k zníženiu spotreby paliva a produkcie emisií CO2 o približne 2,3 %. V prípade plne hybridných vozidiel je možné kvôli vyššej miere rekuperácie predpokladať značne vyššiu úsporu, čo ešte viac zvyšuje potenciál navrhovaného riešenia.
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    1D YIG hole-based magnonic nanocrystal
    (AIP Publishing, 2025-10-23) Levchenko, K. O.; Davidkova, K.; Serha, R. O.; Moalic, M.; Voronov, A. A.; Dubs, C.; Surzhenko, O.; Lindner, M.; Panda, Jaganandha; Wang, Q.; Wojewoda, Ondřej; Heinz, B.; Urbánek, Michal; Krawczyk, M.; Chumak, A. V.
    Magnetic media with artificial periodic modulation-magnonic crystals (MCs)-enable tunable spin-wave dynamics and band structure engineering. Nanoscaling enhances these capabilities, making magnonic nanocrystals promising for both fundamental studies and applications. Here, we report on the design, fabrication, and characterization of one-dimensional YIG MCs with nanoholes ( d approximate to 150 nm) spaced a approximate to 1 mu m apart. Microfocused Brillouin light scattering and propagating spin-wave spectroscopy, supported by TetraX and MuMax3 simulations, reveal spin-wave transmission over 5 mu m in the Damon-Eshbach configuration and the formation of pronounced bandgaps with rejection levels up to 26 dB. Detailed analysis of the spin-wave dispersion uncovered complex mode interactions, including two prominent anticrossings at 3.1 and 18.7 rad/ mu m, between which the spin-wave energy is predominantly carried by the n=2 mode, enabling efficient transmission. The results advance the development of functional MCs and open pathways toward 2D magnonic nanoarrays and magnonic RF nanodevices. (c) 2025 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution-NonCommercial 4.0International (CC BY-NC) license
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    Micro-mirror aided mid-infrared plasmonic beam combiner monolithically integrated with quantum cascade lasers and detectors
    (De Gruyter Brill, 2025-10-27) Marschick, Georg; David, Mauro; Gsodam, Xaver; Opacak, Nikola; Koukola, Dominik; Arigliani, Elena; Evirgen, Axel; Trinite, Virginie; Pes, Salvatore; Isceri, Stefania; Detz, Hermann; Schrenk, Werner; Andrews, Aaron M.; Lendl, Bernhard; Schwarz, Benedikt; Strasser, Gottfried; Hinkov, Borislav
    The development of novel mid-infrared (MIR) devices and systems is crucial for addressing applications in biomedical analysis, chemical reaction-monitoring, or high-bitrate free-space telecommunication. Combining multiple functional elements on one chip into complex miniaturized photonic integrated circuits (PICs), is the next step in these developments, yet limited by existing material and technology constraints. In this work, we introduce a new concept for realizing fully monolithic MIR-PICs based on low-loss on-chip plasmonic guiding and beam combining. The core of our study demonstrates a monolithic beam combiner by integration of active quantum cascade (QC) devices at similar to 8 mu m (laser and detector) with tailored passive waveguides based on weakly-coupled Ge/Au plasmonics and on-chip micro-mirror optics. The on-chip gold-coated micro-mirrors enhance the directional control and beam combining capabilities of the plasmon waveguides while minimizing energy dissipation typically associated with tight plasmon confinement. We discuss the MIR-PIC beam combiner design, micro-fabrication, and characterization and compare it to the routing concept of simple plasmonic Ge/Au y-couplers exploiting strong-confinement.
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    Elimination of pathogenic Aeromonas and Flavobacterium strains in the aquatic environment using CaviPlasma
    (Springer Nature, 2025-10-24) Palikova, Miroslava; Vaibarova, Vera; Stahel, Pavel; Cech, Jan; Toulova, Ivona; Mikulikova, Ivana; Novotna, Hana; Pikula, Jiri; Mendel, Jan; Rudolf, Pavel; Marsalek, Blahoslav; Papezikova, Ivana
    BackgroundThe key limiting factor for recirculating aquaculture systems (RAS) is maintaining good water quality, which requires keeping the system free of bacterial pathogens. In this study, we investigated the potential of CaviPlasma water treatment technology for the industrial-scale disinfection of RAS water.MethodsWe focused on the remediation of model suspensions containing Aeromonas salmonicida, Aeromonas hydrophila, and Flavobacterium psychrophilum, which are important fish disease causative agents that represent significant health risks for reared fish. The CaviPlasma technology utilized is based on advanced oxidation processes induced by plasma discharge in fast-flowing liquids, synergized with the hydromechanical effects of cavitation.ResultsOur results demonstrated strong biocidal efficiency of CaviPlasma water treatment without chemical or medical additives. F. psychrophilum was completely eliminated immediately after treatment, even at the lowest plasma dose (8.4 kJ/L). Aeromonads displayed slightly higher resistance; instant elimination of aeromonads was achieved with a plasma dose of 25.2 kJ/L, or 33.6 kJ/L. However, during post-treatment incubation, the concentration of live aeromonads gradually decreased to zero, even at the lowest plasma dose.ConclusionsOur pilot study revealed that CaviPlasma technology is a promising sanitization method with potential for use in recirculation aquaculture systems (RAS). It offers approximately m3/h treatment performance and the potential to greatly limit the environmental burden and long-term side effects, such as acquired bacterial resistance due to persistent chemical residues associated with common sanitization technologies that utilize antibiotics or chemical treatment of RAS.
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    Integration of SuperCam based chemical imaging and clustering to correlate geochemistry and mineralogy in heterogeneous samples
    (Springer Nature, 2025-10-29) Garcia-Gomez, Laura; Poblacion, Iratxe; Delgado, Tomas; Laserna, Javier; Velasquez, Marizu; Pořízka, Pavel; Buday, Jakub; Kaiser, Jozef; Lobato, Alvaro; Casado, Ana I.; Taravillo, Mercedes; Madariaga, Juan Manuel; Aramendia, Julene; Rull, Fernando; Carrizo, Daniel; Martinez-Frias, Jesus; Vadillo, Inaki; Vadillo, Jose Miguel; Fortes, Francisco J.; Cabalin, Luisa M.
    Peridotites are ultramafic rocks whose mineralogical diversity makes them suitable case studies for testing analytical methodologies. In this study, a peridotite sample from the Ronda massif (M & aacute;laga, Spain) was examined demonstrating a practical methodology for distinguishing geochemically distinct regions within complex lithologies. The sample was analyzed using a multi-instrumental approach combining laser-induced breakdown spectroscopy (LIBS), micro-energy dispersive X-ray fluorescence (mu -EDXRF), and Raman spectroscopy, all of them integrated in the Perseverance rover payload. LIBS and mu -EDXRF were used to assess elemental composition and spatial distribution across the sample, whereas Raman spectroscopy confirmed the presence of mineral phases such as, olivine, pyroxenes, and chromiferous spinels in specific regions. Elemental LIBS ratios such as Mg# and Cr# further supported the identification of compositional variations related to mineral phases. Spectral LIBS data were processed using k-means clustering to segment geochemical zones and detect spatial trends. This integrated spectroscopic and statistical approach enables interpretation of ultramafic rock complexity and offers an efficient framework for planetary exploration under mission constraints.