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51.
Na letošnji licitaciji v Slovenj Gradcu največje število vredne hlodovine do zdaj
Martin Jež, 2023, professional article

Keywords: gozdarstvo, licitacije, okrogli les, vrednotenje lesa, cene
Published in DiRROS: 27.07.2023; Views: 386; Downloads: 122
.pdf Full text (6,80 MB)

52.
Gozdarstvo v Sloveniji leta 1923
Martin Jež, Urban Žitko, Amina Gačo, 2023, professional article

Keywords: gozdarstvo, Slovenija, spravilo lesa, lastništvo gozda, obnova gozda, lesna industrija
Published in DiRROS: 27.07.2023; Views: 384; Downloads: 110
.pdf Full text (2,57 MB)

53.
Integrating geological data in Europe to foster multidisciplinary research
Marc Urvois, Sylvain Grellet, Henning Lorenz, Rainer Haener, Christelle Loiselet, Matthew Harrison, Matija Krivic, Christian Brogaard Pedersen, Marianne B. Wiese, Amelia Baptie, Martin Nayembil, James Trench, Ivor Marsh, Carlo Cipolloni, Chiara d'Ambrogi, Maria Pia Congi, 2022, original scientific article

Abstract: This paper presents novel data discovery and integration, facilitated using borehole logging information with on-demand web services to produce 3D geological structures. This domain interoperability across EPOS was created for the purpose of research, but it is also highly relevant for the response to societal grand challenges such as natural hazards and climate change. European and international interoperability implementation frameworks are well described and used (e.g., INSPIRE, ISO, OGC, and IUGS/CGI). It can be difficult for data providers to deploy web services that support the full semantic data definition (e.g., OGC Complex Feature) to expose several millions of geological entities through web-enabled data portals as required by pan-European projects.
Keywords: EPOS, geological information, borehole, FAIR, linked data
Published in DiRROS: 19.07.2023; Views: 331; Downloads: 111
.pdf Full text (1,98 MB)

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Application of electrochemical methods for studying steel corrosion in alkali-activated materials
Shishir Mundra, Gabriel Samson, Giulia Masi, Rebecca Achenbach, David M. Bastidas, Susana Bernal, Maria Chiara Bignozzi, Maria Criado, Martin Cyr, Nina Gartner, Stefanie von Greve‐Dierfeld, Andraž Legat, Nikoonasab Ali, John L. Provis, Michael Raupach, Gregor J. G. Gluth, 2023, original scientific article

Abstract: Alkali‐activated materials (AAMs) are binders that can complement and partially substitute the current use of conventional cement. However, the present knowledge about how AAMs protect steel reinforcement in concrete elements is incomplete, and uncertainties exist regarding the application of electrochemical methods to investigate this issue. The present review by EFC WP11‐Task Force ‘Corrosion of steel in alkali‐activated materials’ demonstrates that important differences exist between AAMs and Portland cement, and between different classes of AAMs, which are mainly caused by differing pore solution compositions, and which affect the outcomes of electrochemical measurements. The high sulfide concentrations in blast furnace slag‐based AAMs lead to distinct anodic polarisation curves, unusually low open circuit potentials, and low polarisation resistances, which might be incorrectly interpreted as indicating active corrosion of steel reinforcement. No systematic study of the influence of the steel–concrete interface on the susceptibility of steel to corrosion in AAMs is available. Less common electrochemical methods present an opportunity for future progress in the field.
Keywords: alkali-aktivated materials, alkali‐activated materials, anodic/cathodic polarisation, concrete, linear polarisation resistance, open circuit potential, reinforcement corrosion, resistivity
Published in DiRROS: 29.05.2023; Views: 290; Downloads: 128
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60.
Metal and non-metal modified titania : the effect of phase composition and surface area on photocatalytic activity
Boštjan Žener, Lev Matoh, Martin Reli, Andrijana Sever Škapin, Romana Cerc Korošec, 2022, original scientific article

Abstract: The application of TiO 2 photocatalysis in various environmental fields has been extensively studied in the last decades due to its ability to induce the degradation of adsorbed organic pollutants. In the present work, TiO 2 powders doped and co-doped with sulfur and nitrogen and modified with platinum were prepared by particulate sol-gel synthesis. PXRD measurements revealed that the replacement of HCl with H 2SO4 during synthesis reduced the size of the crystallites from ~ 30 nm to ~20 nm, increasing the surface area from ~44 m2/g to ~80 m2/g. This is consistent with the photocatalytic activity of the samples and the measured photocurrent behavior of the photocatalysts. The results showed that the prop- erties of the powders (i.e., surface area, crystallite size, photocurrent behavior) depend strongly not only on the type but also on the amount of acid and dopants used in the synthesis. Doping, co-doping and modification of TiO 2 samples with nitrogen, sulfur and platinum increased their photocatalytic activity up to 6 times.
Keywords: titanium dioxide, powders, doping, photocatalysis, photocurrent, SEM
Published in DiRROS: 04.05.2023; Views: 323; Downloads: 137
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