111. Janus nanocellulose membrane by nitrogen plasma : hydrophilicity to hydrophobicity selective switchAna Oberlintner, Vasyl Shvalya, Neelakandan Marath Santhosh, Martin Košiček, Ivan Jerman, Matej Huš, Uroš Cvelbar, Uroš Novak, Blaž Likozar, 2024, izvirni znanstveni članek Objavljeno v DiRROS: 30.01.2025; Ogledov: 90; Prenosov: 61
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112. Offline indoor navigation via QR codesRobert Modic, Matevž Ogrinc, Andraž Simčič, Bojan Blažica, Drago Torkar, 2025, objavljeni znanstveni prispevek na konferenci Povzetek: This paper introduces a novel, cost-effective system for indoor navigation and localization that operates independently of satellite positioning services and data communication networks. The proposed solution leverages QR codes affixed within building interiors and an accompanying smartphone application, which, through integration with the device’s inertial motion unit (IMU) sensors and the application of the Pedestrian Dead Reckoning (PDR) algorithm [1], accurately determines the user’s position. This position data is then utilized by the Dijkstra navigation algorithm [2] to facilitate user navigation to their desired destination. Beyond navigation, this system offers significant utility in healthcare logistics, enabling efficient collection and transmission of triage decisions in emergency situations, even in the absence of a communication network. Ključne besede: cost-effective system, QR codes, Pedestrian Dead Reckoning, indoor navigation Objavljeno v DiRROS: 30.01.2025; Ogledov: 81; Prenosov: 0
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115. Protein complexes from edible mushrooms as a sustainable potato protection against coleopteran pestsKarmen Pogačar, Maja Grundner, Primož Žigon, Anna Coll Rius, Anastasija Panevska, Tjaša Lukan, Marko Petek, Jaka Razinger, Kristina Gruden, Kristina Sepčić, 2024, izvirni znanstveni članek Ključne besede: biopesticides, Leptinotarsa decemlineata, Solanum tuberosum, insect stress response, larval toxicity, transgenic crop Objavljeno v DiRROS: 30.01.2025; Ogledov: 93; Prenosov: 70
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116. Functional biocarbon-based coatings for wood protection and indoor air depollutionMariem Zouari, Laetitia Sarah Jennifer Marrot, David Brian DeVallance, 2024, izvirni znanstveni članek Povzetek: Growing concerns about indoor air pollution heighten the need to develop depolluting materials to achieve a healthy built environment. This study developed functional coatings for wooden surfaces using 20 wt% photocatalytic biocarbon particles doped with manganese oxide (BC–MnO2) and two different coating materials (linseed oil and waterborne acrylic). The samples' surface hydrophobicity and color properties were tested before and after accelerated aging. The depolluting potential of the samples was evaluated by formaldehyde removal efficiency test in indoor conditions. Results showed that adding BC-MnO2 particles increased the hydrophobicity regardless of the coating material's type. After accelerated aging, the hydrophobicity of all samples increased, which was attributed to the curing of the oil and acrylic polymers and the increase in surface roughness eventually caused by surface damage. The color change (ΔE) was more intense in the case of uncoated wood and samples without BC-MnO2. However, the BC-MnO2-containing coatings were effective in color preservation (ΔE < 2), which was attributed to the anti-UV property of biocarbon. The BC-MnO2-containing coatings exhibited a promising formaldehyde removal efficiency of up to 24 % and 46 % for oil and acrylic samples, respectively. The combination of BC-MnO2 and acrylic material was more favourable to attracting the formaldehyde molecules, likely due to the similar polarity. The developed functional coatings exhibited an acceptable ability for wood protection and formaldehyde remediation and can be potentially used to enhance indoor air quality. Ključne besede: photocatalytic wood coating, hydrophobic surface, UV protection, volatile organic compound, formaldehyde removal Objavljeno v DiRROS: 30.01.2025; Ogledov: 112; Prenosov: 98
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117. Increasing the confinement in railway track ballast layersStanislav Lenart, Siva Ram Karumanchi, 2024, objavljeni znanstveni prispevek na konferenci Povzetek: Insufficient effective confining pressure within the ballast layer can lead to the permanent rotation of grains, causing increased wear and abrasion. Augmenting confinement may not only mitigate ballast degradation but also enhance the overall performance of the track. The increased confining pressure causes the increase of ballasted track stiffness and reduction of resilient and permanent deformation. This paper outlines developing a cost-effective ballast wall arrangement (BWA) to boost ballast layer confinement without disrupting maintenance procedures. It involves incorporating specific secondary raw material elements along the track shoulder, combined with a horizontal geosynthetic reinforcing layer at the base of the ballast layer. These shoulder elements not only impact the track's geometry but also facilitate a reduction in required ballast volume. The efficacy of the ballast confinement mechanism has undergone small-scale testing to prove the concept of reinforcement. Numerical modeling has been developed, which plays a crucial role in supporting the optimal design of this solution. Ključne besede: ballast, railway track, geosynthetics, confining pressure, small-scale test Objavljeno v DiRROS: 30.01.2025; Ogledov: 93; Prenosov: 60
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118. Manganese dioxide-coated biocarbon for integrated adsorption-photocatalytic degradation of formaldehyde in indoor conditionsMariem Zouari, Silvo Hribernik, Laetitia Sarah Jennifer Marrot, Marian Tzolov, David Brian DeVallance, 2024, izvirni znanstveni članek Povzetek: Formaldehyde is a common indoor air pollutant with hazardous effects on human health. This study investigated the efficiency of biocarbon (BC) functionalized with variable contents of MnO2 for formaldehyde removal in ambient conditions via integrated adsorption-photocatalytic degradation technology. The sample with the highest formaldehyde removal potential was used to prepare a functional coating made of acrylic binder mixed with 20 wt% of the particles and applied on beech (Fagus sylvatica L) substrate. SEM images showed that MnO2 was deposited around and inside the pores of the BC. EDX spectra indicated the presence of Mn peaks and increased content of oxygen in the doped BC compared to pure BC, which indicated the successful formation of MnO2. Raman spectra revealed that the disorder in the BC's structure increased with increasing MnO2 loadings. FTIR spectra of BC–MnO2 samples displayed additional peaks compared to the BC spectrum, which were attributed to MnO vibrations. Moreover, the deposition of increased MnO2 loadings decreased the porosity of the BC due to pores blockage. The BC sample containing 8 % Mn exhibited the highest formaldehyde removal efficiency in 8 h, which was 91 %. A synergetic effect between BC and MnO2 was observed. The formaldehyde removal efficiency and capacity of the coating reached 43 % and 6.1 mg/m2, respectively, suggesting that the developed coating can be potentially used to improve air quality in the built environment. Ključne besede: biocarbon, manganese dioxide, catalytic degradation, functional coating, built environment Objavljeno v DiRROS: 30.01.2025; Ogledov: 107; Prenosov: 90
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119. Effect of Ce:Ti ratio and cerium salts on the properties of mesoporous Ti-Ce oxides and their photocatalytic activityPeter Nadrah, Mateja Knap, T. Vikram Sagar, Andrijana Sever Škapin, Urška Lavrenčič Štangar, 2025, izvirni znanstveni članek Povzetek: To investigate the influence of different CeO2 precursors and Ce:Ti ratios, we have synthesised 8 mesoporous Ti-Ce oxides via the evaporation-induced self-assembly (EISA) method with Ce:Ti ratios between 0.2 and 20 mol%.The materials exhibited type IV isotherms and a specific surface area of 140–180 m2⋅g 1 with pore diameters in range of 3–20 nm. The crystalline phases of materials comprised predominantly anatase with a significant decrease in overall crystalline content with increasing Ce:Ti ratio. Materials with higher Ce:Ti ratio showed an increased light absorption in the visible region. Although crystalline CeO2 was not detected, the presence of Ce(IV) was confirmed by X-ray photoelectron spectroscopy. For the photocatalytic experiments, we compared these materials with the TiO2-CeO2 composites of our previously published syntheses to yield 16 samples synthesized via three synthesis approaches: (1) concurrent synthesis from titanium alkoxide and cerium salts in one pot, (2) synthesis of TiO2 in the presence of previously-synthesised CeO2 and (3) physical mixing of separately-synthesised TiO2 and CeO2. Samples produced by physically mixing the separately-synthesised TiO2 and CeO2 showed the best photocatalytic activity towards gaseous isopropanol degradation, while the samples with TiO2 synthesised in the presence of CeO2 showed the best photocatalytic stability. Ključne besede: Ti-Ce oxides, evaporation-induced self-assembly, isopropanol oxidation, photocatalysis, mesoporous material Objavljeno v DiRROS: 30.01.2025; Ogledov: 99; Prenosov: 79
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120. Metodologija za računanje rabe energije v obstoječih stavbah, zaščitenih kot kulturna dediščina po PURES-3 : primerjava scenarijevAlen Hausmeister, Jože Hafner, Katja Malovrh Rebec, 2024, izvirni znanstveni članek Povzetek: V članku je predstavljena metodologija za izračun rabe energije v obstoječih stavbah, zaščitenih kot kulturna dediščina, s poudarkom na primerjavi mesečne in dinamične metode. Evropska in slovenska gradbena zakonodaja predvidevata postopno uvajanje dinamične metode, ki temelji na urnih vhodnih podatkih in simulira pogoje delovanja objekta na podlagi 3D-modela. V Sloveniji se poleg novega Pravilnika o učinkoviti rabi energije (PURES-3) uvaja tudi obvezna raba informacijskega modeliranja gradenj (BIM). V študiji smo preizkusili različne metodologije za pripravo in prenos podatkov v BIM okolju ter izvedli izračune z uporabo programske opreme CYPE Thermal, ki temelji na dinamičnem orodju EnergyPlus. Za referenčni objekt smo določili štiri scenarije, ki vključujejo različne posege na ovoju stavbe ter aktivno in pasivno senčenje. Ugotovili smo, da obstajajo pomembna odstopanja med obema metodama, ki se razlikujejo glede na specifične scenarije. Največji vpliv na razlike imata pogostost vhodnih podatkov o temperaturi okolice in solarni dobitki, ki jih dinamična metoda obravnava z večjo natančnostjo. Ta raziskava ponuja pomembne vpoglede v metodologijo izračuna energijske učinkovitosti stavb, kar je ključno za trajnostno prenovo obstoječega stavbnega fonda v Sloveniji. Ključne besede: gradbena fizika, dinamične simulacije, učinkovita raba energije, spomeniško zaščitene stavbe, informacijsko modeliranje, BIM Objavljeno v DiRROS: 30.01.2025; Ogledov: 91; Prenosov: 44
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