1631. Gaia Early Data Release 3 : Gaia photometric science alertsSimon Hodgkin, D. L. Harrison, E. Breedt, T. Wevers, Guy Rixon, A. Delgado, A. Yoldas, Z. Kostrzewa-Rutkowska, Mitja Fridman, Andreja Gomboc, 2021, izvirni znanstveni članek Ključne besede: Gaia satellite, transients, alerts
Objavljeno v RUNG: 02.11.2021; Ogledov: 1672; Prenosov: 8
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1633. Whole-life carbon emissions benchmarks for buildings in SloveniaMarjana Šijanec-Zavrl, Henrik Gjerkeš, 2021, kratki znanstveni prispevek Opis: According to the European Green Deal decarbonisation of EU building stock is needed on the way to turning EU into the first climate neutral continent by 2050. Directive (2010/31/EU) EPBD led to significant reduction of operational energy in new buildings and renovation. By energy efficiency first principle and by increasing renewable energy sources it contributed to reduction of primary energy and operational CO2 emissions. But the orientation towards lifecycle thinking and circularity in the building sector revealed the need to tackle the whole-life carbon emissions, where the operational and embodied carbon contribute significantly. In the absence of benchmarks for embodied carbon emissions in this contribution the operational and embodied carbon indicators from recent studies are compared with the available corresponding data in Slovenian energy performance certificates.
Ključne besede: carbon emissions, life cycle assessment, buildings
Objavljeno v RUNG: 29.10.2021; Ogledov: 1806; Prenosov: 0
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1634. Thresholds to the "Great Unread" : titling practices in eleven ELTeC collectionsRoxana Patraş, Carolin Odebrecht, Ioana Galleron, Rosario Arias, J. Berenike Herrmann, Cvetana Krstev, Katja Mihurko, Dmytro Yesypenko, 2021, izvirni znanstveni članek Ključne besede: digital humanities, electronic collection, titles
Objavljeno v RUNG: 29.10.2021; Ogledov: 1793; Prenosov: 67
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1636. Evropska noč raziskovalcev 2021 (ENR2021): ZnAnosT za vsE (ZATE) : Doktorski študij – priložnost na začetku karierne potiAna Toroš, druga izvedena dela Opis: Okrogla miza, organiziran kot spletni dogodek preko videokonferenčnega sistema, je namenjena širokemu krogu mladih, ki jih zanima znanost in bi se radi na svoji karierni poti aktivno vključili v znanstveno raziskovalno delo na različnih področjih znanosti od naravoslovja in tehnike do humanistike ali na izrazito interdisciplinarnih področjih, kot so znanost o okolju, trajnostni razvoj grajenega okolja ali krasoslovje. Na okrogli mizi bodo sodelovali direktorji in direktorice doktorskih programov Fakultete za podiplomski študij(FPŠ) in dekan FPŠ. Na okrogli mizi želimo spodbuditi mlade na začetku svoje karierne poti, da se odločijo za pridobitev raziskovanih izkušenj, ki jih pozneje v poklicni karieri lahko izkoristijo tako v akademskem okolju kot v drugih poklicnih usmeritvah v gospodarstvu ali negospodarskih dejavnostih. Sodelujoči na okrogli mizi bodo predstavili kakšne kompetence, ne le strokovne ampak tudi generične, lahko študentje pridobijo v okviru doktorskega študija in kakšne možnosti se jim s tem odprejo na bodoči karierni poti in pri osebnostnem razvoju. Poslušalci bodo imeli možnost aktivnega vključevanja v razgovor z raziskovalci s postavljanjem vprašanj, na katera bodo člani okrogle mize neposredno odgovarjali.
Ključne besede: doktorski študij, zaposlitev, humanistika
Objavljeno v RUNG: 27.10.2021; Ogledov: 1473; Prenosov: 0
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1637. Resolving the dilemma of Fe-N-C catalysts by the selective synthesis of tetrapyrrolic active sites via an imprinting strategyDavide Menga, Jian Liang Low, Yan-Sheng Li, Iztok Arčon, Burak Koyutürk, Friedrich Wagner, Francisco Ruiz-Zepeda, Miran Gaberšček, Beate Paulus, Tim-Patrick Fellinger, 2021, izvirni znanstveni članek Opis: Combining the abundance and inexpensiveness of
their constituent elements with their atomic dispersion, atomically
dispersed Fe−N−C catalysts represent the most promising
alternative to precious-metal-based materials in proton exchange
membrane (PEM) fuel cells. Due to the high temperatures
involved in their synthesis and the sensitivity of Fe ions toward
carbothermal reduction, current synthetic methods are intrinsically
limited in type and amount of the desired, catalytically active Fe−
N4 sites, and high active site densities have been out of reach
(dilemma of Fe−N−C catalysts). We herein identify a paradigm
change in the synthesis of Fe−N−C catalysts arising from the
developments of other M−N−C single-atom catalysts. Supported
by DFT calculations we propose fundamental principles for the synthesis of M−N−C materials. We further exploit the proposed
principles in a novel synthetic strategy to surpass the dilemma of Fe−N−C catalysts. The selective formation of tetrapyrrolic Zn−N4
sites in a tailor-made Zn−N−C material is utilized as an active-site imprint for the preparation of a corresponding Fe−N−C catalyst.
By successive low- and high-temperature ion exchange reactions, we obtain a phase-pure Fe−N−C catalyst, with a high loading of
atomically dispersed Fe (>3 wt %). Moreover, the catalyst is entirely composed of tetrapyrrolic Fe−N4 sites. The density of
tetrapyrrolic Fe−N4 sites is more than six times as high as for previously reported tetrapyrrolic single-site Fe−N−C fuel cell catalysts
Ključne besede: Fe-N-C catalysts, selective synthesis, tetrapyrrolic active sites, EXAFS, XANES, single atom, DFT
Objavljeno v RUNG: 25.10.2021; Ogledov: 1930; Prenosov: 54
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1638. Gravity wave instability structures and turbulence from more than 1.5 years of OH[ast] airglow imager observations in SloveniaRené Sedlak, Patrick Hannawald, Carsten Schmidt, Sabine Wüst, Michael Bittner, Samo Stanič, 2021, izvirni znanstveni članek Opis: We analyzed 286 nights of data from the OH* airglow imager FAIM 3 (Fast Airglow IMager) acquired at Otlica Observatory, Slovenia, between 26 October 2017 and 6 June 2019. Measurements were performed with a spatial resolution of 24 m per pixel and a temporal resolution of 2.8 s. Multiple turbulence episodes were observed and the energy dissipation rate in the upper mesosphere/lower thermosphere region was estimated from image sequences in 25 cases. Values range around 0.08 and 9.03 W/kg and would lead to an approximated localized maximum heating of 0.03–3.02 K per turbulence event.
Ključne besede: upper mesosphere, lower thermosphere, remote sensing, gravity waves, turbulence, Bora episodes
Objavljeno v RUNG: 25.10.2021; Ogledov: 1839; Prenosov: 0
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