61. Detoxified spent pot lining from aluminum production as (alumino-)silicate source for composite cement and autoclaved aerated concreteArne Peys, Mateja Košir, Ruben Snellings, Ana Mladenovič, Liesbeth Horckmans, 2021, original scientific article Abstract: New sources of supplementary cementitious materials (SCMs) are needed to meet the future demand. A potential new source of SCM is spent pot lining, a residue from aluminum production. The present work showed that the refined aluminosilicate part of spent pot lining (SPL) has a moderate chemical reactivity in a cementitious system measured in the R3 calorimetry test, comparable to commercially used coal fly ash. The reaction of SPL led to the consumption of Ca(OH)2 in a cement paste beyond 7 days after mixing. At 28 and 90 days a significant contribution to strength development was therefore observed, reaching a relative strength, which is similar to composite cements with coal fly ash. At early age a retardation of the cement hydration is caused by the SPL, which should most likely be associated with the presence of trace amounts of NH3. The spent pot lining is also investigated as silica source for autoclaved aerated concrete blocks. The replacement of quartz by spent pot lining did not show an adverse effect on the strength-density relation of the lightweight blocks up to 50 wt% quartz substitution. Overall, spent pot lining can be used in small replacement volumes (30 wt%) as SCM or as replacement of quartz (50 wt%) in autoclaved aerated concrete blocks.
Keywords: spent pot lining, construction materials, recycling, autoclaved aerated conctrte, supplementary cementitious material
Published in DiRROS: 04.12.2023; Views: 215; Downloads: 90
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62. Citodiagnostika netipljivih lezij v dojkahAna Pogačnik, Margareta Strojan Fležar, 2004, published scientific conference contribution Abstract: Izhodišča. Aspiracijska biopsija s tanko iglo (ABTI) je uveljavljena metoda zadiagnostiko sprememb v dojki. V pričujoči študiji smo želeli ugotoviti zanesljivost ultrazvočno (UZ) ali rentgensko (RTG) vodene ABTI za diagnostiko netipljivih lezij v dojki na podlagi cito-histološke korelacije in izračunati občutljivost, specifičnost, napovedno veljavnost pozitivne in negativne diagnoze. Bolniki in metode. V retrospektivno študijo smo vključili 179 žensk,pri katerih je bila v letu 2003 izvršena UZ ali/in RTG vodena ABTI netipljive lezije v dojki, ki je bila kasneje histološko opredeljena na vzorcubiopsije z debelo iglo, vodeni ekscizijski biopsiji ali na kirurškem resektatu. Rezultati. V 66 (36,8%) primerih je bil histološko dokazan karcinom, v 113 (63,1%) primerih pa benigna lezija. Citopatološke diagnoze v skupini karcinomov so bile: karcinom v 41 primerih (62,1%), sumljivo za karcinom v 12 (18,2%), napačno negativna diagnoza v 3 (4,5%), v 10 (15%) primerih pa niso dobili dovolj materiala za diagnozo. Zaključki. V skupini benignih lezij smo iz vzorca ABTI postavili pravilno negativno diagnozo v 55 primerih (48,7%), napačno sumljivo v 18 (15,9%), napačno pozitivno diagnozo v enem primeru (0,88%) in v 39 (34,5%) primerih nismo dobili dovolj materiala zadiagnozo. Občutljivost metode v naši študiji je bila 91%, specifičnost 98%, napovedna veljavnost pozitivne diagnoze 97,6% in napovedna veljavnost negativne diagnoze 94,8 %.
Published in DiRROS: 01.12.2023; Views: 178; Downloads: 63
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63. Not another hillshade: alternatives which improve visualizations of bathymetric dataAna Novak, Sašo Poglajen, Marko Vrabec, 2023, original scientific article Abstract: Increasing awareness of the importance of effective communication of scientific results and concepts, and the need for more accurate mapping and increased feature visibility led to the development of novel approaches to visualization of high-resolution elevation data. While new approaches have routinely been adopted for land elevation data, this does not seem to be the case for the offshore and submerged terrestrial realms. We test the suitability of algorithms provided by the freely-available and user-friendly Relief Visualization Toolbox (RVT) software package for visualizing bathymetric data. We examine the algorithms optimal for visualizing the general bathymetry of a study area, as well as for highlighting specific morphological shapes that are common on the sea-, lake- and riverbed. We show that these algorithms surpass the more conventional analytical hillshading in providing visualizations of bathymetric data richer in details, and foremost, providing a better overview of the morphological features of the studied areas. We demonstrate that the algorithms are efficient regardless of the source data type, depth range, resolution, geographic, and geological setting. The summary of our results and observations can serve as a reference for future users of RVT for displaying bathymetric data.
Keywords: bathymetry, RVT, visualization, hillshade, geomorphology, marine geology, multibeam
Published in DiRROS: 01.12.2023; Views: 214; Downloads: 69
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64. In situ consideration of resistance of bridge girder according to EC2 with AEMAna Brunčič, Andrej Štrukelj, Maja Kreslin, Andrej Anžlin, Aljoša Šajna, 2023, published scientific conference contribution Abstract: The paper presents a case study of a considerably cracked and degraded bridge in Slovenia: with the implementation of in-situ measurements under bending and shear and the use of a non-destructive acoustic emission technique. Despite the existing crack system, the latter was able to detect microstructural changes. These were characterised by low values of average frequency (AF), as well as lower values of the rise time-amplitude ratio (RA), and energy. A correlation between shear capacity and acoustic activity was observed. This promises to expand the use of AE in the process of assessing of the load-bearing capacity of existing concrete structures.
Keywords: shear resistance, shear crack, crack width, acoustic emission (AE) parameters, bridge girder, stiffness, elasticity, damage evaluation
Published in DiRROS: 28.11.2023; Views: 219; Downloads: 116
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65. Vloga dermatologa v preventivi malignih tumorjev kožeAna Benedičič-Pilih, Igor Bartenjev, 1999, review article Abstract: Preventiva malignih tumorjev kože (MTK) obsega vrsto dejavnosti, ki imajo namen preprečiti razvoj teh bolezni, katerih incidenca v zadnjih desetletjih vztrajno narašča po svetu in pri nas. Dermatolog ima pomembno vlogo ne le pri diagnostiki in zdravljenju različnih vrst MTK, temveč tudi pri individualnem svetovanju glede zaščite kože pred delovanjem različnih kancerogenov v okolju ter pri razvoju zdravstvene politike v smeri razumevanja in sprejemanja za zdravje kože potrebnih sprememb v stališčih in obnašanju do škodljivih vplivov okolja, ki sodelujejo pri razvoju MTK.
Published in DiRROS: 27.11.2023; Views: 188; Downloads: 57
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66. O akupunkturi : informacije za bolnikeIztok Potočnik, Branka Stražišar, Tanja Bohinc, Ajša Repar, Teodora Zupanc, Milena Kerin-Povšič, 2023, dictionary, encyclopaedia, lexicon, manual, atlas, map Keywords: akupunktura, medicina, kitajska medicina, bolniki
Published in DiRROS: 22.11.2023; Views: 398; Downloads: 163
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67. Obsevanje ginekoloških tumorjevBarbara Šegedin, Helena Barbara Zobec Logar, Manja Šešek, Ana Perpar, Blaž Grošelj, Miha Oražem, 2023, professional monograph Keywords: teleterapija, brahiterapija, prehrana, kemoterapija, stranski učinki
Published in DiRROS: 22.11.2023; Views: 354; Downloads: 103
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69. Citodiagnostika tumorjev dojkeAna Pogačnik, 1998, review article Abstract: Aspiracijska biopsija s tanko iglo je tehnično nezahtevna, hitra in zanesljivapredoperativna diagnostična metoda lezij v dojki, ki jo lahko izvedemo brez kakršnih koli poprejšnjih priprav. Občutljivost in specifičnost metode sta v rokah izkušenega citopatologa približno 90 odstotni, napovedana veljavnost pozitivnega rezultata pa je okoli 99%. Napačno pozitivni in tudi napačno negativni rezultati so redki, še posebno v primerih, ko citopatolog sam izvaja aspiracijsko biopsijo in interpretira spremembe.
Published in DiRROS: 22.11.2023; Views: 341; Downloads: 82
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70. Closing data gaps and paving the way for pan-European fire safety efforts : Terminology of fire statistical variablesMartina Manes, Ana Sauca, Mohamad El Houssami, Petra Andersson, Colin McIntyre, Richard Campbell, David Rush, Anja Hofmann, Peter Wagner, Sergei Sokolov, Mindel Leene, Margrethe Kobes, Dirk Oberhagemann, Nicola Rupp, Grunde Jomaas, Friedrich Grone, Eric Guillaume, 2023, original scientific article Abstract: A well-defined terminology of fire-related variables is important for correct analyses and supporting knowledge-based decisions regarding the evaluation of building fires at the European level. After developing an overview of current practices for fire statistics in Part I, the terminology used and the data collected by the EU Member States and eight other countries regarding fire incidents, property damage and human losses were mapped to increase awareness of their practice and support a comprehensive assessment of several fire statistical datasets. A questionnaire was distributed to relevant authorities responsible for the collection, elaboration/analysis, and fire statistical data publications to define and select the essential variables for an appropriate fire assessment and fire incident description. Based on the results of the questionnaire able to identify the essential fire statistical variables and a detailed analysis of current definitions adopted in the fire statistics of the EU Member States and other countries, a common terminology is proposed to collect the necessary data in the EU Member States and obtain meaningful datasets based on standardised terms and definitions. The results will generate essential outputs to move towards harmonised fire statistics at the EU level and contribute to an appropriate analysis able to improve fire prevention and fire mitigation in building fires.
Keywords: fire statistics, fire incidents, building fires, fire statistical variables, terminology
Published in DiRROS: 13.11.2023; Views: 321; Downloads: 158
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