11. Aerosol spectral optical properties in the Paris urban area and its peri-urban and forested surroundings during summer 2022 from ACROSS surface observationsLudovico Di Antonio, Claudia Di Biagio, Paola Formenti, Aline Gratien, Vincent Michoud, Christopher Cantrell, Astrid Bauville, Antonin Bergé, Mathieu Cazaunau, Griša Močnik, 2025, izvirni znanstveni članek Opis: Abstract. The complex refractive index (CRI; n−ik) and the single scattering albedo (SSA) are key parameters driving the aerosol direct radiative effect. Their spatial, temporal, and spectral variabilities in anthropogenic–biogenic mixed environments are poorly understood. In this study, we retrieve the spectral CRI and SSA (370–950 nm wavelength range) from in situ surface optical measurements and the number size distribution of submicron aerosols at three sites in the greater Paris area, representative of the urban city, as well as its peri-urban and forested rural environments. Measurements were taken as part of the ACROSS (Atmospheric Chemistry of the Suburban Forest) campaign in June–July 2022 under diversified conditions: (1) two heatwaves leading to high aerosol levels, (2) an intermediate period with low aerosol concentrations, and (3) an episode of long-range-transported fire emissions. The retrieved CRI and SSA exhibit an urban-to-rural gradient, whose intensity is modulated by the weather conditions. A full campaign average CRI of 1.41−0.037i (urban), 1.52−0.038i (peri-urban), and 1.50−0.025i (rural) is retrieved. The imaginary part of the CRI (k) increases and the SSA decreases at the peri-urban and forest sites when exposed to the influence of the Paris urban plume. Values of k > 0.1 and SSA < 0.6 at 520 nm are related to a black carbon mass fraction larger than 10 %. Organic aerosols are found to contribute to more than 50 % of the aerosol mass and up to 10 % (urban), 17 % (peri-urban), and 22 % (forest) of the aerosol absorption coefficient at 370 nm. A k value of 0.022 (370 nm) was measured at the urban site for the long-range-transported fire episode.
Ključne besede: aerosol optical properties, aerosol refractive index, absorption, air pollution
Objavljeno v RUNG: 17.03.2025; Ogledov: 158; Prenosov: 0
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12. Beyond surface area : enhanced pseudocapacitive properties of cobalt layered double hydroxide through structural modificationsAnja Siher, Ksenija Maver, Uroš Luin, Albin Pintar, Iztok Arčon, Andraž Mavrič, 2025, izvirni znanstveni članek Opis: Cobalt hydroxide and other first-row transition metal hydroxides have gained significant attention as pseudocapacitor materials due to their rapid and reversible redox processes. Their layered structures facilitate interactions between electrolyte anions and cobalt cation sites within the bulk of the material, enabling higher charge density and extending redox activity beyond the particle surface. By controlled precipitation under hydrothermal conditions, the structure and morphology of cobalt hydroxides can be optimized to enhance electrochemical performance. Challenging conventional assumptions, surface area alone is not the primary factor driving increased pseudocapacitive performance. The hexagonal hydrotalcite-like structure, characterized by lower skeletal density and larger basal plane spacing, outperforms the monoclinic cobalt carbonate hydroxide structure, achieving an order of magnitude higher capacitance. In situ X-ray absorption spectroscopy provides critical insights into the pseudocapacitive behavior, revealing enhanced accessibility of Co2+ sites for electrochemical oxidation. While monoclinic cobalt carbonate hydroxide exhibits minimal changes in the Co2+ oxidation state, indicative of surface-limited redox activity, the hydrotalcite-like cobalt hydroxides show substantial shifts in the Co K-edge position, highlighting oxidation of Co2+ sites throughout the bulk.
Ključne besede: pseudocapacitors, layered-double hydroxides, cobalt hydroxide, redox processes, in situ x-ray absorption spectroscopy
Objavljeno v RUNG: 14.03.2025; Ogledov: 283; Prenosov: 6
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15. Siloxane polyacrylic sol-gel coatings with alkly and perfluoroalkyl chains: synthesis, composition, thermal properties and log-term corrosion protectionIngrid Milošev, Damir Hamulić, Peter Rodič, Charly Carrière, Sandrine Zanna, Hanna Budasheva, Dorota Korte, Mladen Franko, Dimitri Mercier, Antoine Seyeux, Philippe Marcus, 2022, izvirni znanstveni članek Objavljeno v RUNG: 12.03.2025; Ogledov: 204; Prenosov: 2
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17. Graditelji mostovPeter Purg, 2025, umetniško delo Opis: The foosball figurines become architect performers, evolving their usual competitive poses into collaborative choreographies aided by different tools and props. Instead of scoring against each other, players must construct a bridge across the entire field. Both teams score when a bridge is successfully built across the entire field. Or they both loose.
Ključne besede: dada, instalacija, namizni nogomet, skulpture
Objavljeno v RUNG: 11.03.2025; Ogledov: 235; Prenosov: 0
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18. Razstava Peaces - raziskovanje miru kot čezmejne množine : 6. 3. 2025, Chemnitz, Germany2024, umetniška poustvaritev Opis: The exhibition reimagines peace as both a plural concept and multifaceted experience, exploring mainly its artistic, but also scientific, and societal dimensions. Opening on March 6, 2025 at Weltecho Chemnitz, this unique event hosted by the City of Chemnitz and supported by GO!2025 European Capital of Culture Nova Gorica - Gorizia as well as the ACROSS European university alliance, commemorates the Day of Peace and Remembrance through a collaborative, interdisciplinary showcase.
Featuring contributions from ACROSS university students and young artists from Nova Gorica, Udine, Banja Luka, Chemnitz and beyond, the exhibition includes contemporary art installations, videos, photographs, live performances and a cinema program of short films and animations, challenging perceptions of hospitality, migration, and resilience, while speculating on peace as both a trans-human and trans-border priority.
Besides a guided tour through the artworks, the opening event will feature two performances, a cinema screening and an international panel discussion, offering diverse perspectives on peacebuilding in a fragmented world. By colliding creative expression with cultural exchange, Peaces invites audiences to reflect on the complexity of peace as both a universal aspiration and a deeply personal imperative.
Curated by: dr. pETER Purg, University of Nova Gorica (ACROSS), GO!2025
Design and setup by: Gašper Rebernik, Taša Mir, Matej Pirkovič (University of Nova Gorica School of Arts)
Produced by the City of Chemnitz, with support of University of Nova Gorica School of Arts (Erasmus+), Chemnitz Technical University, GO!2025 European Capital of Culture Nova Gorica - Gorizia.
Artists:
Abiral Khadka, Aljaž Lavrič, Andrea Mariani, Ana Evtić, Anja
Paternoster, Arta Kroni, Batul Al Aidi, Blaž Stantič Kobal, Blhar, Brina Fekonja, Doroteja
Dolinšek, Emilija Vučićevič, EMMIR, Frederic Bußmann, Gašper Rebernik,
Heidrun Friese, Ivana Kalc, Karel Doing, Kristina Pranjić, Maria
Matiashova, Matej Pirkovič, Milena Brkić, Nika Karner, Natalie Bleyl,
Peter Purg, Sandra Marić, Simone Dotto, Simon Weckert, Taša Mir, Tamara
Kirina, Tamara Taskova, Tijana Mijušković, Dr. Ulrike Brummert
Ključne besede: exhibition, intermedia, peace, capital of culture, across, university, intercultural, film
Objavljeno v RUNG: 11.03.2025; Ogledov: 215; Prenosov: 2
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20. LensWatch. II. improved photometry and time-delay constraints on the strongly lensed type Ia supernova 2022qmx ("SN Zwicky") with Hubble Space Telescope template observationsC. Larison, Justin Pierel, M. J. B. Newman, S. W. Jha, D. Gilman, E. E. Hayes, A. Agrawal, N. Arendse, Mateusz Bronikowski, Tanja Petrushevska, 2025, izvirni znanstveni članek Opis: Abstract
Strongly lensed supernovae (SNe) are a rare class of transient that can offer tight cosmological constraints that are complementary to methods from other astronomical events. We present a follow-up study of one recently discovered strongly lensed SN, the quadruply imaged type Ia SN 2022qmx (aka “SN Zwicky”), at z = 0.3544. We measure updated, template-subtracted photometry for SN Zwicky and derive improved time delays and magnifications. This is possible because SNe are transient, fading away after reaching their peak brightness. Specifically, we measure point-spread-function photometry for all four images of SN Zwicky in three Hubble Space Telescope WFC3/UVIS passbands (F475W, F625W, and F814W) and one WFC3/IR passband (F160W), with template images taken ∼11 months after the epoch in which the SN images appear. We find consistency to within 2σ between lens-model-predicted time delays (≲1 day) and measured time delays with HST colors (≲2 days), including the uncertainty from chromatic microlensing that may arise from stars in the lensing galaxy. The standardizable nature of SNe Ia allows us to estimate absolute magnifications for the four images, with images A and C being elevated in magnification compared to lens model predictions by about 6σ and 3σ, respectively, confirming previous work. We show that millilensing or differential dust extinction is unable to explain these discrepancies, and we find evidence for the existence of microlensing in images A, C, and potentially D that may contribute to the anomalous magnification.
Ključne besede: supernova, strong lensing, astronomy
Objavljeno v RUNG: 10.03.2025; Ogledov: 285; Prenosov: 9
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