1111. Primerjava naprednih 3D tehnologij za skeniranje pri nadzoru kvalitete industrijskih izdelkovJakob Fabjan, Adela Pišmo, Vesna Pungerčar, Slavko Arh, 2025, objavljeni strokovni prispevek na konferenci Povzetek: 3D skeniranje je nekontaktna tehnologija, s katero lahko fizični objekt pretvorimo v digitalni model, kar industriji omogoča obratni inženiring in nadzor kakovosti (preverjanje skladnosti s predpisi). Pri nadzoru kakovosti se pogosto uporabljajo napredne tehnologije kot je 3D skeniranje. Vendar imajo te napredne tehnike določene omejitve: če ima na primer predmet izvrtine ali če so poškodbe skrite v notranjosti, jih s temi metodami ne moremo zaznati. Takšne informacije pa so ključnega pomena za napovedovanje trajnosti materiala in odkrivanje skritih napak (razpoke, prisotnost vključkov, nehomogenost materiala). Zato se naša raziskava osredotoča na primerjavo treh različnih tehnik za zajem tridimenzionalnih podatkov industrijskega izdelka iz aluminija: 3D skeniranje s strukturirano svetlobo, 3D skeniranje z lasersko svetlobo in skeniranjem z uporabo računalniške tomografije (CT). Cilj je bil primerjati posamezne tehnike glede na natančnost izdelave v primerjavi s CAD modelom ter glede na količino in kakovost informacij, ki jih posamezna tehnika omogoča. Pri tem smo upoštevali, ali tehnika omogoča analizo zunanjih geometrijskih lastnosti materialov in drugih pomembnih značilnosti. Rezultati raziskave kažejo, da je kombinacija 3D skeniranja skupaj s CT analizo smiselna za preverjanje visoke kakovosti in boljše napovedi življenjske dobe industrijskega izdelka.
Ključne besede: 3D-skeniranje z lasersko triangulacijo, 3D-skeniranje s strukturirano svetlobo, CT-skeniranje, nadzor kakovost
Objavljeno v DiRROS: 17.09.2025; Ogledov: 390; Prenosov: 87
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1112. Metal–support interaction between titanium oxynitride and Pd nanoparticles as a tool for tuning the selectivity of electrocatalytic hydrogenation of furfuralNik Maselj, Jan Trputec, Martin Šala, Kristina Mervič, Ivan Marić, Francisco Ruiz-Zepeda, Marjan Bele, Vasko Jovanovski, Nejc Hodnik, Primož Jovanovič, 2025, izvirni znanstveni članek Objavljeno v DiRROS: 17.09.2025; Ogledov: 355; Prenosov: 176
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1113. Tomato spotted wilt virus in tomato from Croatia, Montenegro and Slovenia: genetic diversity and evolutionDijana Škorić, Jelena Zindović, Dorotea Grbin, Patrik Pul, Vladan Božović, Paolo Margaria, Nataša Mehle, Anja Pecman, Zala Kogej Zwitter, Denis Kutnjak, Ana Vučurović, 2025, izvirni znanstveni članek Povzetek: Tomato spotted wilt orthotospovirus (TSWV) is a major plant pathogen causing significant economic losses in tomato production worldwide. Understanding its genetic diversity and evolutionary mechanisms is crucial for effective disease management. This study analyzed TSWV isolates from symptomatic tomato plants collected across Croatia, Montenegro and Slovenia between 2020 and 2024. High-throughput sequencing (HTS) was employed to obtain whole-genome sequences, followed by phylogenetic analyses to assess genetic variability and relationships among isolates from these three countries and other isolates of worldwide geographic origin. Phylogenetic analyses placed all studied isolates within the L1-M3-S3 genotype, commonly associated with solanaceous crops in Europe. While Croatian and Slovenian isolates exhibited high genetic similarity, Montenegrin isolates clustered in a distinct subgroup, showing closer relationships to Asian and Mediterranean accessions. Despite the severe disease symptoms observed, no substitutions in the NSm protein associated with resistance-breaking (RB) phenotypes were detected. These findings suggest that additional virome components, environmental factors or so far unknown mechanism(s) may contribute to infection and disease severity in tomato and strongly support the need of continuous surveillance of TSWV genetic diversity in order to inform breeding programs and develop sustainable management strategies to mitigate future outbreaks.
Ključne besede: tomato, HTS, phylogeny, TSWV, plant virus
Objavljeno v DiRROS: 16.09.2025; Ogledov: 341; Prenosov: 156
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1114. Stable implementation of a Chen-based enhancement to the Lee phase-change model for CFD simulation of film boiling under energetic melt-coolant interaction conditionsMihael Boštjan Končar, Matej Tekavčič, Mitja Uršič, Mihael Sekavčnik, 2026, izvirni znanstveni članek Povzetek: This study investigates heat and mass transfer during energetic melt-coolant interactions, focusing on film boiling around a hot melt particle in subcooled convective flow. The considered conditions, free-flow velocities of a few m/s, melt particle temperatures of several thousand K, particle diameters of several tens of a μm, and liquid subcooling of several tens of a K, align with TREPAM experiments (CEA, France). A two-phase computational fluid dynamics framework, based on the Volume of Fluid method, is used. An improved phase-change model is implemented, combining Chen’s explicit formulation of the phase-change intensity factor with the robustness of the conventional Lee model. The approach reduces sensitivity to empirical parameters and enhances phase-change localisation. Additional constraints on the intensity factor ensure numerical stability under extreme thermal conditions relevant to vapour energetic melt-coolant interactions. Simulations of TREPAM experiments demonstrate improved heat flux predictions and enhanced flow dynamics capture. Analysis of the simulated velocity fields reveal secondary flows in the vapour wake, impacting heat and mass transfer and emphasizing the need to resolve vapor-phase flow conditions. To fully validate proposed modifications to phase-change model further numerical and experimental investigation is required, focusing on vapour film morphology and localized heat transfer intensity.
Ključne besede: film boiling, extreme thermal conditions, phase-change modelling, computational fluid dynamics, two-phase flow
Objavljeno v DiRROS: 16.09.2025; Ogledov: 269; Prenosov: 130
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1118. Plasma-tunable metasurfaces for SERS nanosensing of hazardous chemicalsVasyl Shvalya, Andrii Breus, Oleg Baranov, Damjan Vengust, Janez Zavašnik, Uroš Cvelbar, 2025, izvirni znanstveni članek Povzetek: The demand for rapid, field-deployable detection of hazardous substances has intensified the search for plasmonic sensors with both high sensitivity and fabrication simplicity. Conventional approaches to plasmonic substrates, however, often rely on lithographic precision or complex chemistries limiting scalability and reproducibility. Here, a facile, one-step synthesis of vertically aligned 2D nanosheets composed of intergrown Cu2O/CuO crystallites is presented, fabricated via oxygen plasma discharge on copper substrates. Decorated with a discontinuous Ag nanoparticle layer, the substrates serve as high-performance plasmonic metasurface exhibiting nanomolar sensitivity of explosive molecules, with detection limits as low as 4–5 nm for tetryl and 2–3 nm for HMX under 488 nm excitation. Importantly, the SERS (Surface enhanced Raman scattering) activity expands into a broad spectral range (488, 535, 633 nm), enabled by the formation of plasmonic “hotspots” network within nanoparticle gaps, crevices, that cumulatively boost SERS signal. A pronounced red-shift in the symmetric NO2 stretching mode of tetryl is further demonstrated, attributed to LUMO-mediated charge transfer from the Ag Fermi level—highlighting the need for laser- and substrate-sensitive interpretation of vibrational data. Together, these findings advance the rational design of low-cost, reproducible SERS substrates for trace chemical detection, with potential for integration into autonomous sensing platforms.
Ključne besede: plasmonic sensors, surface enhanced Raman scattering
Objavljeno v DiRROS: 16.09.2025; Ogledov: 381; Prenosov: 146
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1119. Splay nematic phaseerAlenka Mertelj, Luka Cmok, Nerea Sebastián Ugarteche, Richard J. Mandle, Rachel R. Parker, Adrian C. Whitwood, J. W. Goodby, Martin Čopič, 2018, izvirni znanstveni članek Objavljeno v DiRROS: 15.09.2025; Ogledov: 375; Prenosov: 91
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