@article{BernardiBerdjaGuzmanetal.2023, author = {Bernardi, Rafael L. and Berdja, Amokrane and Guzman, Christian Dani and Torres-Torriti, Miguel and Roth, Martin M.}, title = {Restoration of T80-S telescope's images using neural networks}, series = {Monthly notices of the Royal Astronomical Society}, volume = {524}, journal = {Monthly notices of the Royal Astronomical Society}, number = {2}, publisher = {Oxford Univ. Press}, address = {Oxford}, issn = {0035-8711}, doi = {10.1093/mnras/stad2050}, pages = {3068 -- 3082}, year = {2023}, abstract = {Convolutional neural networks (CNNs) have been used for a wide range of applications in astronomy, including for the restoration of degraded images using a spatially invariant point spread function (PSF) across the field of view. Most existing development techniques use a single PSF in the deconvolution process, which is unrealistic when spatially variable PSFs are present in real observation conditions. Such conditions are simulated in this work to yield more realistic data samples. We propose a method that uses a simulated spatially variable PSF for the T80-South (T80-S) telescope, an 80-cm survey imager at Cerro Tololo (Chile). The synthetic data use real parameters from the detector noise and atmospheric seeing to recreate the T80-S observational conditions for the CNN training. The method is tested on real astronomical data from the T80-S telescope. We present the simulation and training methods, the results from real T80-S image CNN prediction, and a comparison with space observatory Gaia. A CNN can fix optical aberrations, which include image distortion, PSF size and profile, and the field position variation while preserving the source's flux. The proposed restoration approach can be applied to other optical systems and to post-process adaptive optics static residual aberrations in large-diameter telescopes.}, language = {en} } @misc{Vorpahl2023, author = {Vorpahl, Daniel}, title = {Jonah}, series = {Encyclopedia of Jewish-Christian Relations Online}, journal = {Encyclopedia of Jewish-Christian Relations Online}, publisher = {De Gruyter}, address = {Berlin/Boston}, doi = {10.1515/ejcro.17349041}, year = {2023}, abstract = {In the Masoretic canon of the Tanakh the book of Jonah appears as the fifth part of Tre Assar, or Twelve Minor Prophets, between Obadiah and Micah. In the Septuagint, on the other hand, Jonah appears as the sixth book in the series, and is followed immediately by Nahum. As both Jonah and Nahum speak out against the city of Nineveh, their chronology became an issue early in their discourses of reception (Liv. Pro. 11:1; Josephus, Ant. 9:239-242; Tg.Nah 1:1).}, language = {en} } @article{RuszkiewiczPapatheodorouJaecketal.2023, author = {Ruszkiewicz, Joanna and Papatheodorou, Ylea and J{\"a}ck, Nathalie and Melzig, Jasmin and Eble, Franziska and Pirker, Annika and Thomann, Marius and Haberer, Andreas and Rothmiller, Simone and B{\"u}rkle, Alexander and Mangerich, Aswin}, title = {NAD+ Acts as a protective factor in cellular stress response to DNA alkylating agents}, series = {Cells : open access journal}, volume = {12}, journal = {Cells : open access journal}, number = {19}, publisher = {MDPI}, address = {Basel}, issn = {2073-4409}, doi = {10.3390/cells12192396}, pages = {22}, year = {2023}, abstract = {Sulfur mustard (SM) and its derivatives are potent genotoxic agents, which have been shown to trigger the activation of poly (ADP-ribose) polymerases (PARPs) and the depletion of their substrate, nicotinamide adenine dinucleotide (NAD+). NAD+ is an essential molecule involved in numerous cellular pathways, including genome integrity and DNA repair, and thus, NAD+ supplementation might be beneficial for mitigating mustard-induced (geno)toxicity. In this study, the role of NAD+ depletion and elevation in the genotoxic stress response to SM derivatives, i.e., the monofunctional agent 2-chloroethyl-ethyl sulfide (CEES) and the crosslinking agent mechlorethamine (HN2), was investigated with the use of NAD+ booster nicotinamide riboside (NR) and NAD+ synthesis inhibitor FK866. The effects were analyzed in immortalized human keratinocytes (HaCaT) or monocyte-like cell line THP-1. In HaCaT cells, NR supplementation, increased NAD+ levels, and elevated PAR response, however, did not affect ATP levels or DNA damage repair, nor did it attenuate long- and short-term cytotoxicities. On the other hand, the depletion of cellular NAD+ via FK866 sensitized HaCaT cells to genotoxic stress, particularly CEES exposure, whereas NR supplementation, by increasing cellular NAD+ levels, rescued the sensitizing FK866 effect. Intriguingly, in THP-1 cells, the NR-induced elevation of cellular NAD+ levels did attenuate toxicity of the mustard compounds, especially upon CEES exposure. Together, our results reveal that NAD+ is an important molecule in the pathomechanism of SM derivatives, exhibiting compound-specificity. Moreover, the cell line-dependent protective effects of NR are indicative of system-specificity of the application of this NAD+ booster.}, language = {en} } @article{ChemuraSchrumpfGuenteretal.2023, author = {Chemura, Sitshengisiwe and Schrumpf, Tim and G{\"u}nter, Christina and Kumke, Michael Uwe}, title = {Ceria nanomaterials containing ytterbium}, series = {RSC Advances : an international journal to further the chemical sciences}, volume = {13}, journal = {RSC Advances : an international journal to further the chemical sciences}, number = {50}, publisher = {RSC Publishing}, address = {London}, issn = {2046-2069}, doi = {10.1039/D3RA06868D}, pages = {35445 -- 35456}, year = {2023}, abstract = {Lanthanide based ceria nanomaterials are important practical materials due to the redox properties that are useful in the avenues pertaining to technology and life sciences. Sub 10 nm spherical and highly monodisperse Ce1-xYbxO2-y (0.04 ≤ x ≤ 0.22) nanoparticles were synthesized by thermal decomposition, annealed separately at 773 K and 1273 K for 2 hours and characterized. Elemental mapping for Yb3+ doped ceria nanoparticles shows homogeneous distribution of Yb3+ atoms in the ceria with low Yb3+ content annealed at 773 K and 1273 K for 2 hours. However, clusters are observed for 773 K annealed ceria samples with high concentration of Yb3+. These clusters are not detected in 1273 K annealed nanomaterials. Introducing small amounts of Yb3+ ions into the ceria lattice as spectroscopic probes can provide detailed information about the atomic structure and local environments allowing the monitoring of small structural changes, such as clustering. The emission spectra observed at room temperature and at 4 K have a manifold of bands that corresponds to the 2F5/2 → 2F7/2 transition of Yb3+ ions. Some small shifts are observed in the Stark splitting pattern depending on the sample and the annealing conditions. The deconvolution by PARAFAC analysis yielded luminescence decay kinetics as well as the associated luminescence spectra of three species for each of the low Yb3+ doped ceria samples annealed at 773 K and one species for the 1273 K annealed samples. However, the ceria samples with high concentration of Yb3+ annealed at the two temperatures showed only one species with lower decay times as compared to the low Yb3+ doped ceria samples.}, language = {en} } @misc{MeythalerBaumannKrasnovaetal.2023, author = {Meythaler, Antonia and Baumann, Annika and Krasnova, Hanna and Hinz, Oliver and Spiekermann, Sarah}, title = {Technology for humanity}, series = {Business \& information systems engineering}, volume = {65}, journal = {Business \& information systems engineering}, number = {5}, publisher = {Springer Fachmedien}, address = {Wiesbaden}, issn = {2363-7005}, doi = {10.1007/s12599-023-00831-w}, pages = {487 -- 496}, year = {2023}, language = {en} } @article{GleissDegenKnothetal.2023, author = {Gleiß, Alexander and Degen, Konrad and Knoth, Alexander and Pousttchi, Key and Lucke, Ulrike}, title = {Governance principles and regulatory needs for a national digital education platform}, series = {Public policy and administration}, journal = {Public policy and administration}, publisher = {Sage}, address = {London}, issn = {0952-0767}, doi = {10.1177/09520767231202327}, pages = {1 -- 31}, year = {2023}, abstract = {The educational sector currently faces a massive digital transformation with various digital offerings entering the market. To provide some orientation in this transforming space, a national digital education platform (NDEP) is under development in Germany as part of a nationwide flagship project. On the one hand, in efficiently connecting the relevant stakeholders to each other and to value-adding education-related offerings, various benefits emerge. On the other hand, monopolising the educational sector and influencing the respective market through a state-controlled platform bears potential regulatory risks from misuse of power by the platform to malpractice by the users. Against this background, we aim to identify and systematise these potential drawbacks prior to the platform's actual development and implementation. We pursue a qualitative, interpretivist approach for policy analysis, based on ten elite interviews and two workshops. Our results are threefold: (1) We capture the consolidated NDEP architecture; (2) We categorise the range of relevant functions and value propositions of the NDEP; (3) We derive 23 regulatory areas of conflict across the three building blocks that result from the potential ecosystem and function scope configurations of the NDEP. As a contribution to research, we shed new interdisciplinary light on the governance and infrastructure of public-private platforms that enable innovation and collaboration while integrating respective market segments. As a contribution to practice, we provide clear guidance for policy-makers in strategizing the development and governance of and through national digital platforms in education.}, language = {en} } @article{Metzger2023, author = {Metzger, Jan}, title = {Refined position estimates for surfaces of Willmore type in Riemannian manifolds}, series = {Communications in analysis and geometry}, volume = {30}, journal = {Communications in analysis and geometry}, number = {10}, publisher = {International Press of Boston}, address = {Somerville, Mass.}, issn = {1019-8385}, doi = {10.4310/CAG.2022.v30.n10.a5}, pages = {2315 -- 2346}, year = {2023}, abstract = {In this paper we consider surfaces which are critical points of the Willmore functional subject to constrained area. In the case of small area we calculate the corrections to the intrinsic geometry induced by the ambient curvature. These estimates together with the choice of an adapted geometric center of mass lead to refined position estimates in relation to the scalar curvature of the ambient manifold.}, language = {en} } @misc{Krasnova2023, author = {Krasnova, Hanna}, title = {Interview with Christoph Neuberger on "How digital technologies are shaping our society and what we can do about it"}, series = {Business \& information systems engineering}, volume = {65}, journal = {Business \& information systems engineering}, number = {5}, publisher = {Springer Fachmedien}, address = {Wiesbaden}, issn = {2363-7005}, doi = {10.1007/s12599-023-00832-9}, pages = {609 -- 611}, year = {2023}, language = {en} } @article{DraganArfiTiberiusetal.2023, author = {Dragan, George Bogdan and Arfi, Wissal Ben and Tiberius, Victor and Ammari, Aymen and Ferasso, Marcos}, title = {Acceptance of circular entrepreneurship}, series = {Journal of business research}, volume = {173}, journal = {Journal of business research}, publisher = {Elsevier}, address = {New York}, issn = {0148-2963}, doi = {10.1016/j.jbusres.2023.114461}, year = {2023}, abstract = {The Circular Economy (CE) - based on five principles (reduce, reuse, refurbish, repair, and recycle) - has received increased attention in both academia and practice in recent years. The transition to CE by public and private organizations can be seen as an entrepreneurial act encompassing their strategic policies, business models, structures, and processes. Little is known about the involvement of employees of organizations making this transition. Therefore, this study investigates the influence of organizations' commitment to the five CE principles on their employees' perceptions of the usefulness, ease of implementation, and acceptability of the principles. The method used is exploratory, a mixed-method approach combining PLS-SEM and fsQCA. This research contributes to the field by developing a unified theoretical perspective on the entrepreneurial context. It also highlights the impact of CE principles on organizations that are transitioning to more sustainable development.}, language = {en} } @article{UllrichReissigNiehoffetal.2023, author = {Ullrich, Andr{\´e} and Reißig, Malte and Niehoff, Silke and Beier, Grischa}, title = {Employee involvement and participation in digital transformation}, series = {Journal of organizational change management}, volume = {36}, journal = {Journal of organizational change management}, number = {8}, publisher = {Emerald}, address = {Bingley}, issn = {0953-4814}, doi = {10.1108/JOCM-10-2022-0302}, pages = {29 -- 48}, year = {2023}, abstract = {Purpose This paper provides a systematization of the existing body of literature on both employee participation goals and the intervention formats in the context of organizational change. Furthermore, degrees of employee involvement that the intervention formats address are identified and related to the goals of employee participation. On this basis, determinants of employee involvement and participation in the context of digital transformation are unveiled. Design/methodology/approach Based on a systematic literature review the authors structure and relate employee participation goals and formats. Through a workshop with expert practitioners, the authors transfer and enhance these theoretical findings in the context of digital transformation. Experts rated the three most important goals and identified accompanying success factors, barriers and effects. Findings The results show that it is not necessarily the degree of involvement but a context-specific selection of measures, the quality of their implementation as well as the actual uptake of suggestions and activities developed by employees that contribute to employees accepting and participating in goal-directed transformations. Moreover, employees must have sufficient information and time for their participation in transformation processes. Originality/value This paper is based on a transformative approach, combining literature analysis to identify formats and goals of employee participation with experiential knowledge of digital transformation practitioners. In addition to relating intervention formats to goals pursued in organizational change processes, empirical and experiential perspectives are used to identify three very relevant goals and respective determinants in digital transformation processes.}, language = {en} }