1591. Investigating the thermal penetration in structural timber elements exposed to natural firesAndrea Lucherini, Vladimír Mózer, 2025, objavljeni znanstveni prispevek na konferenci Povzetek: This study investigates fire-induced charring and thermal penetration in structural timber elements exposed to natural fire conditions, with a focus on the critical role of the cooling phase. A simplified 1D heat transfer model, based on Eurocode 5 temperature-dependent material properties, is implemented to simulate the thermal response of timber members subjected to Eurocode parametric fire curves. The analysis quantifies the char depth (300 °C isotherm) and the zero-strength layer, using both temperature-based (80-300 °C and 120-300 °C) and reduced mechanical properties approaches (tension and compression). Results show that, while the char depth predominantly develops during the heating phase, the zero-strength layer continues to grow during cooling, often reaching a thickness comparable to the char layer. The effective char depth (char depth + zero-strength layer) typically reaches its maximum towards the end of the cooling phase, representing the most critical condition for load-bearing capacity. The most severe conditions arise in low ventilation and high fuel load scenarios, characterised by long-duration fires rather than the highest temperatures. The findings highlight the need to explicitly consider the cooling phase in performance-based fire design for timber structures.
Ključne besede: timber structures, fire safety, charring, zero-strength layer, cooling
Objavljeno v DiRROS: 16.07.2025; Ogledov: 386; Prenosov: 258
 Celotno besedilo (3,57 MB)
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1592. Circularity and longevity of alkali-activated materials : case-study using rock wool as a precursorBarbara Horvat, Sara Tominc, 2025, objavljeni znanstveni prispevek na konferenci Povzetek: Alkali-activated materials (AAMs) are being envisaged as a future alternative to cements because AAMs (i) can be made solely from locally available secondary raw materials and (ii) because of their low energy consumption during synthesis. However, products that cannot be reused should never enter the market. Therefore, the circular economy viability of AAMs was studied by reusing (alkali-activated) pulverised rock wool in alkali activation synthesis until the theoretically determined limit leading to the efflorescence would be reached. While 25% of the maximal allowed liquid alkali did not offer significant mechanical performance, 50, 75 and 100% of allowed alkali ended up with 15, 20 and 20 MPa, respectively, which is only 5 MPa lower than AAM made with the same technique (pressing) in a one-step approach. Therefore, if the initial AAM does not reach the efflorescence limit, it could still be used as a precursor before it becomes waste.
Ključne besede: kamena volna, alkalijsko aktivirani materiali, mikrovalovno obsevanje, elektromagnetna dehidracija, krožni modeli, linearni modeli
Objavljeno v DiRROS: 16.07.2025; Ogledov: 453; Prenosov: 244
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1596. Občina Ajdovščina s protipožarnimi objekti 1:40.000Jaša Saražin, Gašper Ogrin, 2025, slovar, enciklopedija, leksikon, priročnik, atlas, zemljevid Povzetek: Deležniki s področja upravljanja s požari v naravnem okolju z zahodnega območja Slovenije so večkrat izpostavili potrebo po ažuriranem kartnem gradivu za potrebe izvajanja preventivnih in intervencijskih ukrepov za omejevanje požarov v naravnem okolju. Tako gasilstvo kot tudi civilna zaščita sta v Sloveniji v prvi meri organizirana na občinskem nivoju. Zasledujoč ta dva okvira je nastal dotični zemljevid, ki prikazuje celotno območje občin Ajdovščina in Vipava.
V merilu 1 : 40.000 (v primeru tiska 80 cm X 106 cm), nudi širšo sliko, ki je potrebna tako pri orientaciji enot na terenu, lociranju požarov v naravnem okolju, strateškemu načrtovanju pri večjih intervencijah, ali pri koordinaciji več sočasnih dogodkov. Tovrsten večji format zemljevida nudi odlično dopolnitev k obstoječemu Atlasu protipožarnih objektov (2021) in predstavlja novo inovativno možnost podajanja informacij o protipožarnih objektih.
Opozorilo: Poudariti pa je potrebno, da so prikazani podatki preverjeni le za območje občine Ajdovščina, za preostala prikazana območja pa zgolj informativne narave. Nekatere prikazane prometnice imajo omejen prometni režim, po katerih je vožnja dovoljena le pooblaščenim uporabnikom.
Zahvala: Zemljevid je nastal v sklopu Interreg projekta Wildfire CE—Enabling cross-boundary assessment, communication and management of wildfire risks in Central Europe (št projekta: CE0200934), s sodelovanjem Gozdarskega inštituta Slovenije, Občine Ajdovščina in Zavoda za Gozdove Slovenije. Komentarje, ki so prispevali h končni podobi zemljevida pa so prispevali tudi predstavniki GRC Ajdovščina.
Ključne besede: tematski zemljevidi, Ajdovščina, požarna varnost
Objavljeno v DiRROS: 15.07.2025; Ogledov: 419; Prenosov: 225
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1599. Moč uma in telesa : telo kot politični prostor v desetletju po 1. svetovni vojni na SlovenskemPavlina Bobič, 2024, izvirni znanstveni članek Povzetek: Prispevek tematizira ideale in perspektive telesnosti v obdobju pred in po prvi svetovni vojni in jih postavlja v okvir sočasnih poskusov celovite povojne obnove življenj. Na kakšne načine se je princip telesnosti spreminjal v politično krajino, kjer so se spopadle različne ideologije in obenem razkrile svoje poglede na duhovno in telesno moč ter sposobnost (moralne) regeneracije?Tradicionalna ikonografija je črpala iz bogate duhovne in sekularne dediščine ter se klesala ob predstavah o vzgojnih prijemih in pasteh dobe. Dileme so se znotraj sokolskih in orlovskih telesnovzgojnih vsebin prepletale s političnimi, desetletja trajajoča razhajanja med obema organizacijama pa so se še zaostrile v času državljanskega spopada ter poglobila razdor v tradicionalnem taboru med drugo svetovno vojno.
Ključne besede: prva svetovna vojna, povojna moralna obnova, koncepti telesnosti, škof Anton Bonaventura Jeglič, Filip Terčelj, Sokol, Orel.
Objavljeno v DiRROS: 15.07.2025; Ogledov: 352; Prenosov: 158
Celotno besedilo (3,01 MB) |
1600. The clock is ticking : understanding the ‘mixed feelings’ about fusion energy in EuropeChristopher R. Jones, Christian Oltra, Alessio Giacometti, Vanja Čok, Janez Povh, Urša Lamut, Gaston Meskens, Joke Kenens, Robbe Geysmans, Catrinel Turcanu, Zoltan Ferencz, Maria Teresa Orlando, Chiara Bustreo, 2024, izvirni znanstveni članek 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: 476; Prenosov: 212
Celotno besedilo (2,57 MB)
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