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1927. Alkali-activated artificial aggregatesAnže Tesovnik, Ottosen Lisbeth M., Vilma Ducman, 2025, zaključena znanstvena zbirka raziskovalnih podatkov Povzetek: The dataset file contains measurements from macro- to micro-scale analyses of alkali-activated aggregates produced from biomass fly ash. It includes data on mechanical performance, microstructural characterization, and chemical and mineralogical composition. This dataset supports the findings presented in the article entitled "Carbonation of lightweight alkali-activated aggregates based on biomass fly ash: effect on microstructure and leaching behavior" (https://doi.org/10.1016/j.cscm.2025.e05014).
Ključne besede: measurements, alkali-activated materials, biomass ash, carbonation, artificial aggregates
Objavljeno v DiRROS: 16.06.2025; Ogledov: 585; Prenosov: 343
 Raziskovalni podatki (478,07 KB)
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1928. Remission of chronic urticaria in patients treated with omalizumabKlara Cvenkel, Mojca Bizjak, Julij Šelb, Mitja Košnik, 2024, izvirni znanstveni članek Povzetek: Introduction: This study examined the remission probability and duration in chronic spontaneous urticaria (CSU) patients resistant to second-generation H1-antihistamines (sgAHs) undergoing omalizumab treatment.
Methods: This is a retrospective observational study of 176 adult CSU patients exhibiting a significant pruritus component (≥ 8) of the weekly urticaria activity score (UAS7) despite four daily sgAH tablets and starting omalizumab treatment with 300 mg every 4 weeks. After excluding 13 nonresponders, we analyzed 163 omalizumab responders (mean age 51.8 years, 74.4% female). The intervals between applications were increased. Discontinuation was considered for patients that remained asymptomatic on a gradually reduced dosage (to 150 mg every 12 weeks) without sgAHs.
Results: Omalizumab discontinuation was possible in 25.8% (42/163). The duration of omalizumab treatment before remission ranged from 7 to 6 months. Twenty-one patients (50.0%) maintained complete remission until the end of the observation period (September 2021) for 8 to 68 months. Of the relapsed patients, 71.4% (15/21) effectively controlled CSU with sgAHs. Six patients (28.6%; 6/21) required omalizumab reintroduction after 6 to 40 months of remission, responding favorably.
Conclusions: The study shows that a quarter of severe CSU patients achieve long-term remission. In addition, sgAHs effectively
manage symptoms in a majority of relapsed cases, and those requiring omalizumab reintroduction respond favorably.
Ključne besede: urticaria, antihistamines, omalizumab, urticaria, remission, urticaria relapse
Objavljeno v DiRROS: 16.06.2025; Ogledov: 407; Prenosov: 236
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1929. High-Intensity Fast-Response Electric Radiant Panel (HIFREP) to impose fire equivalent heat fluxes on building elements with enhanced thermal boundary conditions accuracyFlorian Put, Balša Jovanović, Evelien Symoens, Andrea Lucherini, Bart Merci, Ruben Van Coile, 2025, izvirni znanstveni članek Povzetek: Bench-scale fire testing has gained popularity as a highly controllable and cost-effective solution, overcoming many of the shortcomings of traditional large-scale fire resistance tests. Whereas gas-fired radiant panels have demonstrated significant success in this area, the present study introduces a novel High-Intensity Fast-Response Electric radiant Panel (HIFREP). Utilizing electrically operated radiation emitters, it provides more precise and quasi-instantaneous control over the thermal boundary conditions. HIFREP delivers high and stable heat fluxes up to 105 kW/m2 , and, due to the low thermal inertia of the emitters, can rapidly adjust its output to changes in the input. In this regard, the time constant of the emitters has been found to be less than 1 s, both during heating and cooling. It eliminates gas combustion and hence avoids the need for extraction hoods when testing the fire performance of non-combustible materials, making it suitable for traditional structural testing laboratories. The presented High-Intensity Fast-Response Electric radiant Panel also provides a reliable tool for the validation of FEM simulation results by accurately replicating the thermal boundary conditions in structural fire engineering analyses.
Ključne besede: radiant panel, fire testing, heat transfer, radiation, heat flux, thermal boundary conditions
Objavljeno v DiRROS: 16.06.2025; Ogledov: 397; Prenosov: 82
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1930. Large high-temperature piezoelectric response of lead-free ▫$BiFeO_3–BaTiO_3$▫ originating from relaxor disorderAntonio Iacomini, Janina Roknić, Issa Sidibe, Marco Scavini, Mojca Otoničar, Hana Uršič Nemevšek, Tadej Rojac, 2025, izvirni znanstveni članek Povzetek: To date, no piezoelectric material system has been developed that would match the piezoelectric performance of the group of lead-based relaxor ferroelectrics, such as Pb(Mg1/3Nb2/3)O3–PbTiO3 (PMN–PT). In the quest to f ind alternatives, continuous efforts have been made to understand the complex microscopic origins leading to the large macroscopic piezoelectric response of PMN–PT and similar lead-based perovskites with relaxor characteristics. Despite significant advances, it is still unclear whether those concepts can be efficiently used to develop lead-free relaxor ferroelectric alternatives. Here, a large piezoelectric response of BiFeO3–BaTiO3 (BFO–BTO) ceramics is reported, characterized by a d33 coefficient of 1200 pmV−1 measured at 325 °C, 1 kV cm−1 of driving field and 90 Hz of field frequency. While composed of multiple contributions, the large response is found to be dominated by a strongly nonlinear and hysteretic process, likely associated with the dynamics of hierarchically arranged nanodomain walls, thus resembling the mechanisms operating in lead-based relaxor materials. Although the response is triggered upon elevated thermal energy, the results provide valuable information about the microscopic behavior that can be potentially used to tailor the response of lead-free relaxor ferroelectrics and bring them closer to the highly performant lead-based perovskites
Objavljeno v DiRROS: 13.06.2025; Ogledov: 439; Prenosov: 147
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