Iskanje po repozitoriju

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Povzetek: If it can be made to work, fusion energy offers the potential for unlimited, clean energy. This prospect has seen substantial investment in the science and engineering behind fusion in order to demonstrate its viability. As key societal stakeholders, the opinions and actions of publics can shape the success of emerging energy technologies. To date, however, there have been relatively few studies focused on the public acceptability of fusion. The current study provides insight into public perspectives about fusion in five European countries (Belgium, Hungary, Italy, Slovenia and Spain). Using a qualitative ‘World Caf´ e’ type method, participants (n =10–25 per country) were provided with basic and balanced information about fusion, before being invited to discuss the risks, benefits and drawbacks of the technology and investment in its development. Transcripts from each World Caf´ e were subject to template analysis. The results indicated that while awareness of fusion was low in each country, participants were broadly supportive of fusion. This support was, however, tentative due to its commercially unproven nature. This stimulated questions about the value of investment in the technology, particularly given the urgency of addressing climate change. While there was some variation in the sub-topics raised and discussed in each country, the principal themes raised were broadly comparable. These findings add to our systematic understanding of the ‘mixed feelings’ held about fusion and have implications for future public engagement and communication efforts relating to the technology.
Ključne besede: fusion, energy, attitudes, public acceptance, social acceptance, World Café
Objavljeno v DiRROS: 15.07.2025; Ogledov: 470; Prenosov: 207
Celotno besedilo (2,57 MB)
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Objavljeno v DiRROS: 15.07.2025; Ogledov: 473; Prenosov: 201
Celotno besedilo (1,36 MB)
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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: 446; Prenosov: 267
Celotno besedilo (1,85 MB)
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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: 427; Prenosov: 228
Celotno besedilo (10,46 MB)
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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: 504; Prenosov: 281
Celotno besedilo (11,16 MB)
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