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1594. Ovire in rešitve pri vključevanju deklet in mladih žensk v gozdarski sektorPolona Hafner, Nike Krajnc, Katarina Flajšman, Darja Stare, Mateja Karničnik, Tatjana Pavlič, Ema Šumenjak, Tina Goznik, Špela Pezdevšek Malovrh, Zala Uhan, 2025, professional article Keywords: gozdarstvo, ženske, gozdarski delavci
Published in DiRROS: 18.07.2025; Views: 541; Downloads: 178
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1596. Poročilo o preskusu št.: LVG 2025-085 : vzorec št. 225/00250/U1Barbara Piškur, Patricija Podkrajšek, Špela Jagodic, Špela Hočevar, Metka Žerjav, Nikica Ogris, 2025, expertise, arbitration decision Keywords: varstvo gozdov, morfološke analize
Published in DiRROS: 18.07.2025; Views: 349; Downloads: 137
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1597. Carbonation of lightweight alkali-activated aggregates based on biomass fly ash : effect on microstructure and leaching behaviorAnže Tesovnik, Ottosen Lisbeth M., Vilma Ducman, 2025, original scientific article Abstract: Artificial aggregates offer a sustainable solution to large-scale waste utilization and the increasing demand for limited natural aggregates. This study extends the understanding of the production of artificial lightweight aggregates with a variable rotation speed approach based solely on biomass fly ash (BFA) alkali-activated materials (AAMs). Systematic variation of alkali content and solution density at a constant water-to-solids ratio showed that alkali concentration significantly influences granulation beyond what can be explained by water availability. The interplay between alkali activation and carbonation was investigated using different mix designs and curing conditions, as well as comparing simultaneous curing carbonation with post-cure carbonation. The results were evaluated with regard to the effects on the macro- and microstructural properties as well as on the leaching behavior. Prolonged carbonation initiated after aggregate formation resulted in premature depletion of Ca, limiting the development of C-A-S-H gels and increasing microporosity, leading to a reduction in mechanical properties. In contrast, post-curing carbonation maintained a compressive strength of over 1 MPa while still allowing carbonation benefits, resulting in compressive strengths comparable to lightweight expanded clay aggregates. Carbonation also proved to be an effective leaching mitigation strategy by stabilizing heavy metals through both physical encapsulation and chemical pH regulation. These results underline the importance of carbonation timing in high Ca AAMs and highlight lightweight aggregates as a viable pathway for BFA valorization, CO₂ sequestration and sustainable construction applications. This approach offers an alternative valorization strategy for BFA facing regulatory restrictions for direct use in cement, while contributing to carbon capture and circular economy initiatives.
Keywords: artificial aggregates, lightweight aggregates, biomass ash, alkali-activated materials, leaching, carbonation
Published in DiRROS: 18.07.2025; Views: 462; Downloads: 482
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1598. Raba števniških zgradb z dvoj- v slovenščiniMladen Uhlik, Andreja Žele, 2024, original scientific article Keywords: slovenščina, števnik, ločilni števnik, števniške zgradbe, družljivost, ujemanje, neujemanje
Published in DiRROS: 17.07.2025; Views: 336; Downloads: 193
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1600. Convex geometries yielded by transit functionsManoj Changat, Lekshmi Kamal K. Sheela, Iztok Peterin, Ameera Vaheeda Shanavas, 2025, original scientific article Abstract: Let $V$ be a finite nonempty set. A transit function is a map $R:V\times V\rightarrow 2^V$ such that $R(u,u)=\{u\}$, $R(u,v)=R(v,u)$ and $u\in R(u,v)$ holds for every $u,v\in V$. A set $K\subseteq V$ is $R$-convex if $R(u,v)\subset K$ for every $u,v\in K$ and all $R$-convex subsets of $V$ form a convexity $\mathcal{C}_R$. We consider the Minkowski-Krein-Milman property that every $R$-convex set $K$ in a convexity $\mathcal{C}_R$ is the convex hull of the set of extreme points of $K$ from axiomatic point of view and present a characterization of it. Later we consider several well-known transit functions on graphs and present the use of the mentioned characterizations on them.
Keywords: Minkowski-Krein-Milman property, convexity, convex geometry, transit function
Published in DiRROS: 17.07.2025; Views: 342; Downloads: 224
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