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Recent Submissions

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    Thermal performance of automotive radiators made of plastic and stainless steel microtubes
    (Elsevier, 2026-02-01) Astrouski, Ilja; Boháček, Jan; Mráz, Kryštof; Horák, Aleš; Bartuli, Erik
    The thermal performance of low-temperature radiators constructed from staggered banks of stainless steel microtubes (SST unit) and polymeric fibers (PF unit, polyamide 612) was investigated in air cross-flow conditions. Tests were performed in a calorimetric wind tunnel according to automotive standards with air velocities of 2-10 m/s and coolant flow rates of 6-60 l/min. Experimental results demonstrated that airside pressure drops for SST and PF radiators are nearly identical, with a difference of approximately 1 %, showing that tube material did not influence airside pressure drops. Regardless of the 50-time difference in thermal conductivity between stainless steel (12 W/(m & sdot;K)) and polyamide (0.24 W/(m & sdot;K)), the heat transfer rate of the PF radiator was, on average, only 7 % lower than ST, with smaller deviations observed at lower air velocities. The Gaddis and Gnielinski model showed good prediction, with average discrepancies of 3 % for heat transfer rate, 7 % for overall and airside heat transfer coefficients, and 5 % for pressure drops. The results confirm that, when middle buffers are used, polymeric hollow-fiber radiators can be a viable lightweight alternative to metals for low-to-moderate airflow applications (2-10 m/s air speed).
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    Surface scan cold plasma technology for effective inhibition of Staphylococcus epidermidis and Escherichia coli
    (Springer Nature, 2026-01-19) Loupová, Veronika; Chobotská, Barbora; Menčík, Přemysl; Kozáková, Zdenka; Hrudka, Jan; Krčma, František; Trebulová, Kristína
    This study examines the decontamination efficacy of cold atmospheric plasma (CAP) against Staphylococcus epidermidis and Escherichia coli, with emphasis on surface scanning parameters and resistance potential. Bacterial cultures on solid nutrient media were treated using a non-thermal microwave plasma torch operated with high-purity argon (4.6) at 5 Slm and 12–13 W. Treatment was systematically varied in scanning direction, speed, and duration. Results indicate that exposure time was the main factor influencing bacterial inhibition, whereas direction and speed exerted only minor effects. E. coli exhibited greater susceptibility compared to S.epidermidis. Repeated exposure experiments revealed no evidence of resistance development.
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    Poznámky z aplikací Fourierovy analýzy
    (VUT v Brně, Fakulta strojního inženýrství, 2026-02-24) Druckmüllerová, Hana; Kalenská, Petra
    Skripta obsahují souhrn potřebné teorie (tzv. spojité) Fourierovy transformace a diskrétní Fourierovy transformace pro její využití při zpracování obrazů a pak tyto aplikace (především obrazové filtry a sesazování obrazů).
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    Inovace předmětu Vybrané parti z obnovitelných zdrojů a ukládání energie na FEKT
    (VUT v Brně, 2026-02) Bača, Petr
    Laboratorní návody, skripta, sylabus
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    Inovace dvousemestrálního předmětu Úvod do permakulturního designu 1 a 2 na FaVU
    (VUT v Brně, 2026-02) Žák, Martin
    ÚPD1_Semenaření. Prezentace v Power Pointu pro studenty předmětu (studijní materiál) Sylabus předmětu