51. Equal abundance of summertime natural and wintertime anthropogenic Arctic organic aerosolsVaios Moschos, Katja Dzepina, Deepika Bhattu, Houssni Lamkaddam, Roberto Casotto, Kaspar R. Daellenbach, Francesco Canonaco, Pragati Rai, Wenche Aas, Silvia Becagli, Giulia Calzolai, Konstantinos Eleftheriadis, Claire E. Moffett, Jürgen Schnelle-Kreis, Mirko Severi, Sangeeta Sharma, Henrik Skov, Mika Vestenius, Wendy Zhang, Hannele Hakola, Heidi Hellén, Lin Huang, Jean-Luc Jaffrezo, Andreas Massling, Jakob K. Nøjgaard, Tuuka Petäjä, Olga Popovicheva, Rebecca J. Sheesley, Rita Traversi, Karl Espen Yttri, Julia Schmale, André S. H. Prévôt, Urs Baltensperger, Imad El Haddad, 2022, original scientific article Abstract: Aerosols play an important yet uncertain role in modulating the radiation balance of the sensitive Arctic atmosphere. Organic aerosol is one of the most abundant, yet least understood, fractions of the Arctic aerosol mass. Here we use data from eight observatories that represent the entire Arctic to reveal the annual cycles in anthropogenic and biogenic sources of organic aerosol. We show that during winter, the organic aerosol in the Arctic is dominated by anthropogenic emissions, mainly from Eurasia, which consist of both direct combustion emissions and long-range transported, aged pollution. In summer, the decreasing anthropogenic pollution is replaced by natural emissions. These include marine secondary, biogenic secondary and primary biological emissions, which have the potential to be important to Arctic climate by modifying the cloud condensation nuclei properties and acting as ice-nucleating particles. Their source strength or atmospheric processing is sensitive to nutrient availability, solar radiation, temperature and snow cover. Our results provide a comprehensive understanding of the current pan-Arctic organic aerosol, which can be used to support modelling efforts that aim to quantify the climate impacts of emissions in this sensitive region. Keywords: Arctic, Organic aerosols, Emission sources, Climate change Published in RUNG: 01.03.2022; Views: 1613; Downloads: 0 This document has many files! More... |
52. Literary foremothers : women writers in dialogue with tradition of their ownKatja Mihurko, 2021, reviewed university, higher education or higher vocational education textbook Abstract: The textbook introduces works by Sappho, Christine de Pizan, Aphra Behn, Maria Edgeworth, Jane Austen, Charlotte Brontë, George Eliot, George Sand, Caroline Norton, Elizabeth Barrett Browning, Emily Dickinson, Laura Marholm, Amalie Skram, Virginia Woolf and Amy Lowell. Some of these authors are presented as the role-models, the others as writers looking for their own female tradition and finding it in the writings of their literary foremothers. These responses - in form of poems, extracts from essays and novels - are included in the textbook and enriched with comments, interpretations and tasks for students. In the introduction, the question of female literary tradition is discussed by presenting various theoretical answers from distinguished feminist scholars. Published in RUNG: 01.03.2022; Views: 1733; Downloads: 95 Link to full text |
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55. Tidal Disruption Events seen through the eyes of Vera C. Rubin ObservatoryKatja Bučar Bricman, 2021, doctoral dissertation Abstract: Tidal Disruption Events (TDEs) are rare transients, which are considered to be promising tools in probing supermassive black holes (SMBHs) and their environments in quiescent galaxies, accretion physics, and jet formation mechanisms. The majority of $\approx$ 60 detected TDEs has been discovered with large field of view time-domain surveys in the last two decades. Currently, about 10 TDEs are discovered per year, and we expect this number will increase largely once the Legacy Survey of Space and Time (LSST) at Vera C. Rubin Observatory begins its observations.
In this work we demonstrate and explore the capabilities of the LSST to study TDEs. To begin with, we simulate LSST observations of TDEs over $10$ years of survey duration by including realistic SED models from MOSFiT into the simulation framework of the LSST. SEDs are then converted into observed fluxes and light curves are simulated with the LSST observing strategy minion_1016. Simulated observations are used to estimate the number of TDEs the LSST is expected to observe and to assess the possibility of probing the SMBH mass distribution in the Universe with the observed TDE sample. We find that the LSST has a potential of observing ~1000 TDEs per year, the exact number depending on the SMBH mass distribution and the adopted observing strategy. In spite of this large number, we find that probing the SMBH mass distribution with LSST observed TDEs will not be straightforward, especially at the low-mass end. This is largely attributed to the fact that TDEs caused by low-mass black holes ($\le 10^6 M_\odot$) are less luminous and shorter than TDEs by heavier SMBHs ($> 10^6 M_\odot$), and the probability of observationally missing them with LSST is higher.
Second, we built a MAF TDE metric for photometric identification of TDEs based on LSST data. We use the metric to evaluate the performance of different proposed survey strategies in identifying TDEs with pre-defined identification requirements. Since TDEs are blue in color for months after peak light, which separates them well from SNe and AGN, we include u-band observations as one of the criteria for a positive identification. We find that the number of identified TDEs strongly depends of the observing strategy and the number of u-band visits to a given field in the sky. Observing strategies with a larger number of u-band observations perform significantly better. For these strategies up to 10% of LSST observed TDEs satisfy the identification requirements. Keywords: Ground-based ultraviolet, optical and infrared telescopes
Astronomical catalogs, atlases, sky surveys, databases, retrieval systems, archives, Black holes, Galactic nuclei (including black holes), circumnuclear matter, and bulges, Infall, accretion, and accretion disks Published in RUNG: 03.01.2022; Views: 2729; Downloads: 61 Full text (124,61 MB) |
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57. Interference of p53:Twist1 interaction through competing nanobodiesSerena D'Agostino, Elisa Mazzega, Katja Praček, Sara Piccinin, Flavia Pivetta, Michela Armellin, Sara Fortuna, Roberta Maestro, Ario De Marco, 2022, original scientific article Keywords: p53, Twist1, nanobodies, competitive elution, sarcoma Published in RUNG: 03.12.2021; Views: 1627; Downloads: 0 This document has many files! More... |
58. High spatial heterogeneity of water stress levels in Refošk grapevines cultivated in Classical KarstFrancesco Petruzzellis, Sara Natale, Luca Bariviera, Alberto Calderan, Alenka Mihelčič, Jan Reščič, Paolo Sivilotti, Katja Šuklje, Klemen Lisjak, Andreja Vanzo, Andrea Nardini, 2022, original scientific article Keywords: Classical Karst, water status, drought stress, grape quality, phenolic profile, vitis vinifera Published in RUNG: 11.11.2021; Views: 2010; Downloads: 0 This document has many files! More... |
59. 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, original scientific article Keywords: digital humanities, electronic collection, titles Published in RUNG: 29.10.2021; Views: 1805; Downloads: 67 Full text (3,18 MB) This document has many files! More... |
60. Šuklje2020, interview Keywords: vinarstvo Published in RUNG: 22.09.2021; Views: 1619; Downloads: 0 This document has many files! More... |