811. Temperature-dependent effectiveness of Ti, Nb, Zr, and Y in controlling grain growth of AISI 304 austenitic stainless steelJaka Burja, Samo Tome, Aleš Nagode, 2025, original scientific article Keywords: microalloying, grain growth, annealing, austenite
Published in DiRROS: 30.10.2025; Views: 218; Downloads: 107
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813. Insights into surface microstructural engineering of Inconel 625 for enhanced oxygen evolution reaction performanceLuka Suhadolnik, Črtomir Donik, Blaž Tomc, Mejrema Nuhanović, Martin Šala, Marjan Bele, Matjaž Finšgar, Andraž Mavrič, Iztok Arčon, Matjaž Godec, Nejc Hodnik, 2025, original scientific article Keywords: electrocatalysis, compositionally complex materials, commercial nickel alloys, oxygen evolution reaction, scanning electron microscopy, IL-SEM
Published in DiRROS: 29.10.2025; Views: 280; Downloads: 152
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814. A core–shell TiON–C nanostructure as a self supported and scalable electrode for fast oxygen evolution reaction in acidic mediaFederico Baiutti, Kosova Kreka, Aleš Marsel, Miha Hotko, Marjan Bele, Anja Logar, Martin Šala, Črtomir Donik, Lazar Bijelić, Carolina Duque Serra, Alex Morata, Albert Tarancón, Miran Gaberšček, Nejc Hodnik, 2025, original scientific article Keywords: PEMEC, fuel cells, hydrogen, titania, iridium, anode
Published in DiRROS: 29.10.2025; Views: 269; Downloads: 128
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816. Joint sustainability reports (JSRs) to promote the third mission of universitiesRoberto Biloslavo, Daniel Simon Schaebs, 2025, original scientific article Abstract: Higher Education Institutions (HEI) face increasing expectations to engage in sustainability reporting despite limited resources and heterogeneous practices. This study explores how Joint Sustainability Reports (JSR), built on the EU Voluntary Sustainability Reporting Standard for non-listed SMEs (VSME), can serve as a cooperative and digitally supported framework to enhance transparency, comparability, and efficiency while strengthening universities’ third mission of societal engagement and knowledge transfer. Qualitative interviews with six sustainability experts from German and Austrian universities of applied sciences (UAS) highlight persistent challenges such as data gaps, staffing shortages, and weak strategic anchoring. The findings show that VSME-based JSRs, through shared data collection, centralised coordination, and modular reporting, enable resource and data pooling, standardised indicators, and cross-university synergies. By making social contributions more visible and credible, JSRs reinforce accountability and advance universities’ third mission in fostering community outreach and sustainable development
Keywords: universities, higher education institutions (HEI), sustainability reporting, CSR, ESG, joint sustainability reports (JSRs)
Published in DiRROS: 28.10.2025; Views: 206; Downloads: 104
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817. Homomorphisms from the Coxeter graphMarko Orel, Draženka Višnjić, 2025, original scientific article Abstract: Let $S_n(\mathbb{F}_2)$ be the set of all $n\times n$ symmetric matrices with coefficients in the binary field $\mathbb{F}_2=\{0,1\}$, and let $SGL_n(\mathbb{F}_2)$ be its subset formed by invertible matrices. Let $\widehat{\Gamma}_n$ be the graph with the vertex set $S_n(\mathbb{F}_2)$ where a pair of vertices $\{A,B\}$ form an edge if and only if $rank(A-B)=1$. Similarly, let $\Gamma_n$ be the subgraph in $\widehat{\Gamma}_n$, which is induced by the set $SGL_n(\mathbb{F}_2)$. Graph $\Gamma_n$ generalizes the well-known Coxeter graph, which is isomorphic to $\Gamma_3$. Motivated by research topics in coding theory, matrix theory, and graph theory, this paper represents the first step towards the characterization of all graph homomorphisms $\Phi: \Gamma_n\to \widehat{\Gamma}_m$ where $n,m$ are positive integers. Here, the case $n=3$ is solved.
Keywords: preserver problems, symmetric matrices, invertible matrices, binary field, rank, graph homomorphisms, Coxeter graph
Published in DiRROS: 28.10.2025; Views: 230; Downloads: 125
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818. Monitoring of root-knot nematodes (Meloidogyne spp.) in Croatia (2022–2024) : occurrence, distribution and species identificationTamara Rehak Biondić, Jasna Milanović, Ivan Poje, Luka Popović, Mirjana Brmež, Barbara Gerič Stare, 2025, original scientific article Keywords: morphological identification, root-knot nematodes, nematodes, survey, molecular identification, Croatia
Published in DiRROS: 28.10.2025; Views: 243; Downloads: 58
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819. Bottom trawling and environmental variables drive the biodiversity of mediterranean demersal assemblagesDavide Agnetta, Ivano Vascotto, Diego Panzeri, Igor Celić, Cosimo Solidoro, Tomaso Fortibuoni, Saša Raicevich, Simone Libralato, 2025, original scientific article Abstract: Marine ecosystems are healthy with a high degree of biodiversity. Assessing how factors affect spatial and temporal patterns of biodiversity is an essential task for the Ecosystem Based Management approach. In this work, we investigated the effect of fisheries disturbance and ocean variables in determining α- and β-diversity of Mediterranean demersal assemblages. Generalized additive mixed models were used to explain the spatio-temporal variability of diversity indices from 2014 to 2020 in three Mediterranean subregions as a function of covariates. An in-depth analysis also made it possible to decouple the effects of bottom trawling from the other covariates. The results show that several fishing activities and environmental variables influence biodiversity, but the direction of change depends on the subregion considered. Bottom trawling instead has a quasi-linear erosion effect on α- and β-diversity in all areas. Valuable commercial species and threatened rays and sharks importantly characterized the sites with low fishing impact. Results are a step towards the development of conservation and management strategies, particularly in the context of the Marine Strategy.
Keywords: biodiversity, fishing, Mediterranean sea, marine strategy
Published in DiRROS: 28.10.2025; Views: 259; Downloads: 111
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820. Decomposition of Whittaker’s gamma diversity : a novel way combining entropies and divergencesIvano Vascotto, Davide Agnetta, 2025, original scientific article Abstract: Accurate, standardized, and comparable methods for estimating biodiversity are crucial in ecology to properly assess and monitor the health of communities. Special cases of generalized entropy are commonly used to estimate alpha diversity. The related concept of generalized divergence can be used to estimate the beta diversity. Using cross entropy notion, we propose a modular decomposition of gamma diversity by using entropy and divergence functions. We prove that if alpha is Shannon entropy and beta is Kullback-Liebler divergence, the classical Whittaker’s gamma diversity is mathematically decomposed via our proposed local gamma index. To show the ecological application of this index and its generalization we compute the local gamma of several orders using a real large biological dataset. The index is discussed in detail for two limit cases, one where the contribution of rare species is the highest and one where richness and evenness are balanced. The index defines a gradient from communities that are dominated by a few common species toward samples shared among several uncommon ones. Our findings support divergence-based measures as practical estimators of beta diversity. Also, the framework here proposed, based on entropy, divergences and cross-entropies, allows us to compute the classic gamma diversity while providing components that are independent, comparable, self-reliant and pointwise distributed.
Keywords: biodiversity, entropy, ecology, computational modelling
Published in DiRROS: 28.10.2025; Views: 223; Downloads: 121
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