1601. Love wave sensors based on gold nanoparticle-modified polypyrrole and their properties to ammonia and ethyleneMilena Šetka, Fabio A. Bahos, Daniel Matatagui, Michal Potoká, Zdenek Kral, Jana Drbohlavová, Isabel Gràcia, Stella Vallejos Vargas, 2020, izvirni znanstveni članek Objavljeno v DiRROS: 15.07.2025; Ogledov: 429; Prenosov: 224
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1604. Impacts of high PV penetration on Slovenia’s electricity grid : Energy Modeling and Life Cycle AssessmentJože Dimnik, Jelena Topić, Ante Čikić, Simon Muhič, 2024, izvirni znanstveni članek Povzetek: The complexities of high PV penetration in the electricity grid in Slovenia based on targets proposed in national energy and climate plan were explored. Scenarios modeled an increase in installation power from 1800 MW in 2030 to 8000 MW in 2050. They were analyzed using energy modeling and life cycle assessment to assess the technical and environmental aspects of high PV grid penetration. The results showed that the increase in PV production from 2200 GWh (2030) to 11,090 GWh (2050) showed an unfavorable course of excess electricity in the system, resulting in the need for short-term and long-term storage strategies and exports of electricity. LCA analysis showed that penetration of a high share of PV results in a decrease in the impact category of global warming, which is higher in 2050 green scenarios that phase out coal and lignite electricity sources (80.5% decrease) compared to the 2020 baseline scenario. The increase in mineral resource scarcity can be observed with an increase in PV share when comparing the 2030 (50%) and 2050 (150%) BAU scenarios with the baseline scenario (2020). Factors such as environmental impacts, technical challenges, and the impact on the grid must be considered when implementing a decarbonization strategy.
Ključne besede: photovoltaic electricity production, sustainable energy system, life cycle assessment, Slovenia, electricity production
Objavljeno v DiRROS: 15.07.2025; Ogledov: 449; Prenosov: 270
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1605. Milan Komar in Evgen Vasiljevič Spektorski - sopotnika preskoka iz prava v filozofijoBlaž Ivanc, 2019, izvirni znanstveni članek Povzetek: Razprava obravnava zgodovinsko in filozofsko vez med zaslužnim profesorjem Katoliške univerze v Buenos Airesu in častnim senatorjem Univerze v Ljubljani dr. Milanom Komarjem (1921–2006) in profesorjem na več pravnih fakultetah (v Varšavi, Kijevu, Beogradu, Pragi in Ljubljani) ter rektorjem Univerze v Kijevu dr. Evgenom V. Spektorskim (1875–1951). Kot glavno ugotovitev razprave lahko najprej postavimo trditev, da je bil Evgen Spektorski v obdobju Komarjevega študija na Juridični fakulteti Univerze v Ljubljani njegov učitelj in mentor, ki ga je želel postaviti za svojega naslednika na stolici. Osebna vez med Komarjem in Spektorskim je po zaključenem Komarjevem doktorskem študiju prerasla tudi v prijateljsko vez. Med njunimi filozofskimi pogledi lahko opazimo ne le veliko sorodnost, temveč genetično povezanost.
Ključne besede: biografije, pravo, filozofija prava, zgodovinski pregledi, Komar, Spektorski
Objavljeno v DiRROS: 15.07.2025; Ogledov: 350; Prenosov: 130
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1606. The Urnfield period Dragomelj I hoard : archaeological and chemical investigationsPeter Turk, David John Heath, Tea Zuliani, 2025, izvirni znanstveni članek Povzetek: The hoard with over 86 kg of metal products unearthed in the settlement at Dragomelj is dated to Ha B1 and com-plements the remains of foundry activities in the nearby settlement at Podgorica. The twin settlements were centres of collection, production, and exchange located on the transport routes that connected the eastern Alpine copper mines with areas to the south. The products in the hoard include biconical ingots with a shaft hole that show a significant correlation between form and chemical composition, which is characterised by tin alloy and modest trace elements (Sb, Ni, As). In contrast, the biconical ingots without a shaft hole contain higher amounts of trace elements. This suggests that the Bronze Age smiths produced different forms of ingots to distinguish between the different metal compositions. The diverse composition of the ingots also indicates the different origins of the chalcopyrite and polymetallic ores used in the production process. The tin alloy of most biconical and some plano-convex ingots is the result of recycling or intentional addition of tin. The analysis of lead isotopes confirms the diverse origin of the objects. In addition to the probable source areas of Mitterberg and Trentino, the supply of copper ores from the nearby Karavanke Mountains remains a possibility.
Ključne besede: late bronze age, hoard, metallurgy, lead-isotope analysis
Objavljeno v DiRROS: 15.07.2025; Ogledov: 430; Prenosov: 229
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1607. Fast transformation of PbTe using a multiphase mixture of precursors : first insightsHugo Rojas-Chávez, Nina Daneu, J. Manuel Juárez-García, 2025, izvirni znanstveni članek Povzetek: For the first time, a mixture of PbTe and Pb- and Te-oxides coated with carbon, under electron beam irradiation (EBI), was transformed into quantum dots, nanocrystals, nanoparticles and grains of PbTe with a sintered appearance. A small portion of non-stoichiometric phases was also obtained. By selecting conditions that favor the instantaneous transformation, the Gibbs free energy barrier is lowered for obtaining different PbTe structures. The driving force associated with the high-energy milling requires 4 h of processing time to reach a complete transformation, while a high-energy source kinetically affects precursor surfaces to cause an abrupt global chemical transformation instantly. Importantly, the size of the PbTe structures increases as they approach the irradiation point, implying a growth process that is affected by the local temperature reached during the EBI. Imaging after the EBI process revealed morphological variations in PbTe, which can be attractive for use in thermoelectric materials. The results of this study provide the first insights into electron-beam-induced reactions using a multiphase mixture of precursors. Therefore, it is believed that this proposal can also be applied to obtain other binary semiconductor structures, even ternary ones.
Ključne besede: semiconductor, multiphase mixture of precursors, rate of transformation
Objavljeno v DiRROS: 15.07.2025; Ogledov: 343; Prenosov: 240
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1608. Alumina and hafnia thin films deposited by atomic layer deposition at different temperatures on biomedical stainless steel and titaniumIvan Spajić, Sandra Drev, Urška Trstenjak, Ingrid Milošev, 2025, izvirni znanstveni članek Povzetek: Alumina and hafnia films produced by the atomic layer deposition were applied to commercially pure Ti and stainless steel 316L specimens for protection under simulated human body conditions. The ALD films were deposited at 180 °C and 260 °C to determine how the deposition temperature affect the films' protective properties. Surface analysis of the ALD films included scanning electron microscopy, transmission electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy. The barrier properties were tested electrochemically using potentiodynamic polarisation and electrochemical impedance spectroscopy (EIS) techniques in a simulated body solution at 37 °C. Alumina thin films showed substantial barrier properties, but after 30 days of immersion, the alumina dissolved regardless of the deposition temperature. EIS tests themselves promoted the dissolution of alumina. In contrast, the barrier properties of hafnia depended significantly on deposition temperature. Hafnia deposited at 180 °C exhibited substantial protective properties and remarkable stability over an extended immersion period. However, when deposited at 260 °C hafnia films showed strong protection at the outset, but after a few days of immersion, they lost their protective ability due to porosity. The key factors affecting the barrier properties of ALD hafnia films were the proportion of the crystalline phase and how crystallites formed.
Ključne besede: thin films, atomic layer deposition, titanium alloys, biomedical steel, medical implants
Objavljeno v DiRROS: 15.07.2025; Ogledov: 507; Prenosov: 282
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1609. “Paste test” – a method for evaluating the fungal inhibition potential of ground wood samplesEli Keržič, Miha Humar, 2025, izvirni znanstveni članek Povzetek: As part of the »ULTRA – University of Ljubljana for a Sustainable Society« project, a new test method was introduced into the curriculum to provide insight into key properties that affect wood durability. This study aimed to adapt and verify the “paste test”, which uses wood dust in nutrient media to assess the inhibitory effect of wood components on fungal growth. The method was adapted to match the available laboratory equipment and simplified for educational use by students at the Department of Wood Science and Technology (Biotechnical Faculty, University of Ljubljana, Slovenia). The study involved testing fungal growth on nutrient media supplemented with spruce wood dust, with the goal of evaluating different grinding methods, nutrient media, and data analysis. Potato dextrose agar nutrient media was confirmed as a suitable alternative to malt extract agar. The wood dust fraction size had no significant effect on fungal inhibition, enabling the use of coarser, less time-saving grinding methods. Image analysis and logistic growth modelling were conducted using freely available software (ImageJ and R-Commander), which proved to be effective alternatives to proprietary tools. Visualization of growth using logistic growth rates offered a clearer comparative analysis, despite some loss of dynamic growth information.
Ključne besede: inhibition, wood chemistry, nutrient media, white rot fungi, brown rot fungi, logistic growth rate
Objavljeno v DiRROS: 15.07.2025; Ogledov: 639; Prenosov: 250
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1610. Delovanje taborišča ŠentvidMiha Drobnič, 2018, izvirni znanstveni članek Povzetek: V prispevku je obravnavano delovanje jugoslovanskega komunističnega taborišča za politične in vojne ujetnike, ki ga je v Škofovih zavodih v Šentvidu nad Ljubljano takoj po koncu druge svetovne vojne v maju 1945 ustanovila Ozna. Podrobnejši pregled režima taborišča Šentvid pokaže, da so se interniranci v njem spopadali z veliko prenatrpanostjo prostorov, s hudo lakoto, slabimi higienskimi razmerami, pogostimi zdravstvenimi težavami ter z najrazličnejšimi oblikami fizičnega in psihičnega nasilja. Nekateri ujetniki so posledično umrli že v taborišču, večina pa je bila brez sodnih postopkov odpeljana proti moriščem, zlasti tistim na območju Kočevskega roga. Edine številčnejše izpustitve, do katerih je prišlo po amnestiji v avgustu 1945, je v taborišču Šentvid dočakal le manjši delež internirancev.
Ključne besede: Škofovi zavodi, Šentvid, taborišča, domobranci, povojni poboji, 1945
Objavljeno v DiRROS: 15.07.2025; Ogledov: 447; Prenosov: 142
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