1. Eco-sustainable food packaging : biobased multi-active films to mitigate migration of mineral oils and polyolefin oligomeric saturated hydrocarbonsAna Miklavčič Višnjevec, Laura Barp, Donatella Peressini, Sabrina Moret, 2026, pregledni znanstveni članek Opis: The migration of mineral oils from recycled paper and cardboard packaging to food has raised increasing con- cerns in recent years. In addition to mineral oil hydrocarbons (MOH), polyolefin oligomeric hydrocarbons (POH), a class of synthetic hydrocarbons derived from the polymerization of olefins such as ethylene and propylene, and often analytically mistaken for MOH, also pose a risk. POH can migrate from plastic materials into food, espe- cially those made with polyolefins like polyethylene (PE) and polypropylene (PP), which are widely used in food packaging (films, trays, containers, etc.). Several solutions have been proposed, and others are still under development to address this issue. Currently, the most promising approach is the introduction of polymeric materials as a barrier to prevent the migration of these contaminants. The primary aim of this review is to provide an updated overview of the migration of MOH and POH from conventional packaging materials into foods, the parameters influencing this process, recent advances in innovative eco-sustainable barrier materials, and the testing methods used to measure their migration. Special attention is given to biopolymers, as they enhance the sustainability of paper and cardboard packaging while maintaining their recyclability.
Ključne besede: mineral oil hydrocarbons, polyolefin oligomeric saturated hydrocarbons, food packaging, sustainability, barrier materials
Objavljeno v RUP: 26.06.2026; Ogledov: 190; Prenosov: 11
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2. Radar-based human-computer interaction when sensing through materialsNuwan Attygalle, Matjaž Kljun, Arthur Sluÿters, Klen Čopič Pucihar, 2026, samostojni znanstveni sestavek ali poglavje v monografski publikaciji Opis: We increasingly interact with computing devices that are either worn on the body (e.g. smartphones, smartwatches) or are embedded within our surroundings (e.g. smart homes, smart offices). These interactions occur through a variety of input methods, including physical buttons and knobs, mid-air gestures, touch and voice commands. With the exception of voice, these modalities require direct or near-direct physical contact with the device, typically involving line-of-sight or proximity for touch or grasp. However, interaction becomes constrained or entirely infeasible (i) when the interaction device is covered (e.g. when a smartphone is inside a pocket or a smartwatch is covered by a jacket sleeve), (ii) in sterile environments requiring separation between the user and device (e.g. when wearing personal protective equipment) or (iii) when interfaces are deliberately concealed for aesthetic, safety or functional reasons. Enabling interaction in such contexts is important to leverage the computational capabilities embedded in our environments. Yet, current technologies remain limited when interaction through occluding materials is needed. In this chapter, we examine existing research on the use of radar-based systems for interaction through materials, focusing on how materials affect system performance, principles for designing such interfaces and strategies to advance these systems.
Ključne besede: radar, human-computer interaction, sensing through materials
Objavljeno v RUP: 18.05.2026; Ogledov: 361; Prenosov: 9
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3. Comparative testing of radar signal representations when sensing through materialsNuwan Attygalle, Matjaž Kljun, Una Vuletić, Klen Čopič Pucihar, 2026, samostojni znanstveni sestavek ali poglavje v monografski publikaciji Opis: The ability to sense mid-air gestures with miniaturised radars embedded in everyday objects opens up new opportunities for interaction. Applications include integration into wearable devices, automotive dashboards, smart furniture, and other components within smart environments. Despite this potential, the lack of studies on how various occluding materials affect gesture recognition performance hinders progress in this area. Previous studies have primarily focused on evaluating only one type of radar signal representation, despite the fact that several other representations exist and were proved effective. To address this, the chapter presents a comparative evaluation of four radar signal representations: In-phase and Quadrature (IQ) representations in the frequency domain and magnitude and range-angle (including both elevation and azimuth components) and range-Doppler. The goal is to assess their robustness against signal distortions introduced by occluding materials. Preliminary results indicate that recognition performance tends to improve with a higher transmission coefficient. Moreover, range-Doppler and range-angle representations exhibit significantly greater robustness to distortion compared to IQ representations
Ključne besede: comparative testing, radar signal representations, sensing through materials
Objavljeno v RUP: 18.05.2026; Ogledov: 350; Prenosov: 10
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4. Digital teaching and copyright challenges under EU law : insights from Slovenian academic staffNina Krmac, Martina Kovačič, 2026, izvirni znanstveni članek Opis: In the context of increasingly digitised education, understanding the lawful use of copyrighted material has become essential for academic staff. This study examines university teachers’ awareness of copyright law and its practical application in teaching, particularly in online and distance learning environments. A quantitative survey was conducted among higher education teachers and faculty assistants at a selected Slovenian university using a structured questionnaire. The findings indicate that, although participants generally recognise the importance of copyright law, their practical knowledge—especially in scenario-based teaching situations—varies considerably. More experienced staff reported higher levels of understanding and greater caution in the use of copyrighted material, whereas less experienced staff more frequently reported practices that may fall outside compliant use. Respondents also expressed strong interest in copyright training, yet only a small proportion reported having access to training opportunities within the institution. The study is embedded in the broader legal framework of EU copyright law, in particular Directive (EU) 2019/790, which introduced mandatory exceptions for digital and cross-border teaching. This directive was transposed into Slovenian legislation in 2022. The results underscore the importance of strengthening legal literacy and institutional support mechanisms to facilitate copyright-compliant teaching in digital learning environments.
Ključne besede: copyright awareness, higher education, teaching materials, copyright law, academic staff training, digital education
Objavljeno v RUP: 07.04.2026; Ogledov: 488; Prenosov: 9
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5. Thermal energy storage and leakage prevention of phase change materials via one-step impregnation and in-situ polymerization process in hardwoodJakub Grzybek, Gabriel Zsembinszki, Emiliano Borri, Alina Meindl, Zuzana Paschová, Alexander Petutschnigg, Luisa F. Cabeza, Thomas Schnabel, 2026, izvirni znanstveni članek Opis: Wood is a versatile material widely used in building construction, but its low thermal mass limits its ability to regulate indoor temperatures and mitigate thermal load peaks. Phase change materials are effective at storing thermal energy, but when impregnated into wood, they leak out, compromising performance and restricting their use in buildings. This study introduces a novel one-step impregnation process combined with in-situ polymerization using furfuryl alcohol and a capric-stearic acid phase change material mixture to create a sustainable material for thermal energy storage. Various formulations were tested on European beech (Fagus sylvatica L.) to evaluate effectiveness of the approach. The results confirm that this method successfully prevents phase change material leakage. Moreover, differential scanning calorimetry and nuclear magnetic resonance verified that phase change materials retain their thermal energy storage functionality, with no chemical cross-linking between the phase change materials and furfuryl alcohol. The treated wood showed up to 185 % higher thermal energy storage capacity, enhanced dimensional stability (anti-swelling efficiency up to 87 %), and 28 % higher compressive strength than untreated wood. It is a step towards sustainable, multifunctional, leakage-free, enhanced mechanical properties, improved dimensional stability wood for thermal energy storage for building applications, with potential for further optimisation and characterisation.
Ključne besede: bio-based materials, fatty acid, furfuryl alcohol, sustainable building materials, wood modification, phase change materials
Objavljeno v RUP: 09.01.2026; Ogledov: 647; Prenosov: 10
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6. Photochemical behavior of colloidal lignin particles under controlled UV exposure : balancing self-stabilization and degradationJulia Tomasich, Rene Alexander Herrera Diaz, Anna Malgorzata Sandak, Michael Harasek, Stefan Beisl, Oihana Gordobil, 2025, izvirni znanstveni članek Opis: Colloidal Lignin Particles (CLPs), with their polyphenolic structure, are promising sustainable alternatives to chemical UV filters. This study investigates the photochemical behavior of CLPs under ultraviolet irradiation synthetized from five different technical raw lignins (Alkali, Organosolv, two Enzymatic Hydrolyzed and Softwood Kraft Lignin) via solvent-shift procedure. The suspensions were irradiated using a self-developed UV-pen set-up and a commercially available UV chamber, enabling controlled UV exposure over time. Variations in the physicochemical properties of irradiated colloidal lignin particles were characterized by Multi-Angle Dynamic Light Scattering (MADLS), Fourier Transform Infrared Spectroscopy (FTIR) coupled with chemometrics, UV–Vis spectroscopy, and High-Performance Size Exclusion Chromatography (HP-SEC). CLPs exhibited comparable responses after 14 days of UV exposure, with alterations in particle chemistry, particularly in the formation of new functional groups and molecular rearrangement. Moreover, the photochemical stability of CLPs was found to be highly dependent on both their concentration and the nature of the dispersion medium (aqueous, hexane-based, and solid-state). At higher concentrations (1.8 mg/mL), CLPs demonstrated effective self-stabilization, while lower concentrations led to rapid degradation, resulting in the disappearance of particles and the formation of low-molecular-weight fragments. Additionally, Minimal photochemical changes were observed in non-aqueous or solid-state environments due to restricted molecular mobility. These findings provide valuable insights into the degradation pathways and stability across different environmental contexts, which can contribute to understanding the potential environmental impact of CLPs in aquatic ecosystems.
Ključne besede: biobased materials, lignin colloidal particles, photodegradation, UV-irradiation, spectroscopy
Objavljeno v RUP: 09.09.2025; Ogledov: 945; Prenosov: 8
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7. Correction: Alao et al. Impact of Alkali and Silane Treatment on Hemp/PLA Composites' Performance: From Micro to Macro Scale. Polymers 2021, 13, 851Percy Festus Alao, Laetitia Sarah Jennifer Marrot, Michael David Burnard, Gregor Lavrič, Mart Saarna, Jaan Kers, 2021, drugi znanstveni članki Ključne besede: hemp fibers, polylactic acid, biocomposite materials, mechanical properties, surface treatments
Objavljeno v RUP: 18.10.2021; Ogledov: 4824; Prenosov: 41
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8. Bioinspired living coating system in service : evaluation of the wood protected with biofinish during one-year natural weatheringFaksawat Poohphajai, Jakub Michal Sandak, Michael Sailer, Lauri Rautkari, Tiina Belt, Anna Malgorzata Sandak, 2021, izvirni znanstveni članek Ključne besede: natural weathering, bio-based coating, service life performance, aesthetics, living fungal cells, bioinspired materials design
Objavljeno v RUP: 24.06.2021; Ogledov: 3054; Prenosov: 78
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9. Energy retrofitting opportunities using renewable materials-comparative analysis of the current frameworks in Bosnia-Herzegovina and SloveniaDarija Gajić, Slobodan Peulić, Tim Mavrič, Anna Malgorzata Sandak, Črtomir Tavzes, Milica Malešević, Mladen Slijepčević, 2021, izvirni znanstveni članek Ključne besede: legal framework, developing countries, existing building stock, energy efficiency, energy consumption, timber, renewable materials
Objavljeno v RUP: 04.02.2021; Ogledov: 4373; Prenosov: 75
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