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255. 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, original scientific article Published in DiRROS: 30.01.2025; Views: 118; Downloads: 72
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256. Offline indoor navigation via QR codesRobert Modic, Matevž Ogrinc, Andraž Simčič, Bojan Blažica, Drago Torkar, 2025, published scientific conference contribution Abstract: 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.
Keywords: cost-effective system, QR codes, Pedestrian Dead Reckoning, indoor navigation
Published in DiRROS: 30.01.2025; Views: 110; Downloads: 0
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259. 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, original scientific article Keywords: biopesticides, Leptinotarsa decemlineata, Solanum tuberosum, insect stress response, larval toxicity, transgenic crop
Published in DiRROS: 30.01.2025; Views: 133; Downloads: 95
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260. Functional biocarbon-based coatings for wood protection and indoor air depollutionMariem Zouari, Laetitia Sarah Jennifer Marrot, David Brian DeVallance, 2024, original scientific article Abstract: 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.
Keywords: photocatalytic wood coating, hydrophobic surface, UV protection, volatile organic compound, formaldehyde removal
Published in DiRROS: 30.01.2025; Views: 133; Downloads: 118
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