cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Le nozze di Figaro : = Die Hochzeit des Figaro : Oper : [Daraus:] Duetto für 2 Sopran (Susanna & Contessa) : "Sull'aria" = "Nun, soll ich?"
Die Hochzeit des Figaro
Creators: name: Mozart, Wolfgang Amadeus
Publisher: name: Diabelli et Comp.
Year: 1825

description: II. Vokalmusik. 1. Opern
description: [Ausg. für Gesang mit Klavierbegl., Text ital. u. dt.]
description: Doppelte Seitenzählung: 2-5 (oben), 78-81 (unten)
Schwarzschild Geometry Emerging from Matrix Models
Creators: name: Blaschke, Daniel N.
name: Steinacker, Harold
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We demonstrate how various geometries can emerge from Yang-Mills type matrix models with branes, and consider the examples of Schwarzschild and Reissner-Nordstroem geometry. We provide an explicit embedding of these branes in R^{2,5} and R^{4,6}, as well as an appropriate Poisson resp. symplectic structure which determines the non-commutativity of space-time. The embedding is asymptotically flat with asymptotically constant θ^{μν} for large r, and therefore suitable for a generalization to many-body configurations. This is an illustration of our previous work arXiv:1003.4132, where we have shown how the Einstein-Hilbert action can be realized within such matrix models.
description: 21 pages, 1 figure
Unquenching the Landau Gauge Lattice Propagators and the Gribov Problem
Creators: name: Silva, P. J.
name: Oliveira, O.
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: The gluon and ghost propagators are computed using both quenched and dynamical configurations for the same lattice spacings. The Wilson fermions are simulated at several quark masses. Furthermore, the effect of the Gribov copies is evaluated for all sets of configurations.
description: 7 pages, 5 figures, poster presented at Lattice 2010 (Vacuum Structure and Confinement)
What Makes Re-finding Information Difficult ? A Study of Email Re-finding
Creators: name: Elsweiler, David
name: Baillie, Mark
name: Ruthven, Ian
Publisher: name: Universität Regensburg
Year: 2011
Subjects: subject: 004 Informatik
subject: 020 Bibliotheks- und Informationswissenschaft

description: Advances in Information Retrieval Proceedings, ECIR 2011
Bernoulli--Dedekind Sums
Creators: name: Beck, Matthias
name: Chavez, Anastasia
Publisher: name: arXiv
Year: 2010
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11F20, 11B68

description: Let $p_1,p_2,\dots,p_n, a_1,a_2,\dots,a_n \in \N$, $x_1,x_2,\dots,x_n \in \R$, and denote the $k$th periodized Bernoulli polynomial by $\B_k(x)$. We study expressions of the form \[ \sum_{h \bmod{a_k}} \ \prod_{\substack{i=1\\ i\not=k}}^{n} \ \B_{p_i}\left(a_i \frac{h+x_k}{a_k}-x_i\right). \] These \highlight{Bernoulli--Dedekind sums} generalize and unify various arithmetic sums introduced by Dedekind, Apostol, Carlitz, Rademacher, Sczech, Hall--Wilson--Zagier, and others. Generalized Dedekind sums appear in various areas such as analytic and algebraic number theory, topology, algebraic and combinatorial geometry, and algorithmic complexity. We exhibit a reciprocity theorem for the Bernoulli--Dedekind sums, which gives a unifying picture through a simple combinatorial proof.
description: 14 pages
Comparison of pharmacological and non-pharmacological antidepressants in postpartum depression: outcomes of mother and male and female offspring
Creators: name: Gobinath, Aarthi R.
Publisher: name: University of British Columbia
Year: 2018

description: Postpartum depression (PPD) is a psychiatric illness that affects approximately 15% of mothers, negatively impacting mental health during the postpartum as well as increasing risk for future depression. For the developing child, untreated PPD is associated with several adverse outcomes including increased risk for depression, anxiety, and poor cognition particularly in boys. However, treating PPD is complicated because pharmacological antidepressants like fluoxetine (FLX) may function differently within the physiological conditions of the postpartum period. Additionally, these drugs are active in breast milk, directly reaching the infant and potentially influencing neurodevelopment. The long-term effects of neonatal antidepressant exposure are unclear. Alternatively, non-pharmacological antidepressants such as exercise are generally beneficial for maternal and fetal health; however, its potential as an antidepressant in the postpartum and its long-term effects on offspring are unclear. To investigate this, this thesis used a rat model of PPD in which dams are treated with high levels of corticosterone (CORT; primary rat glucocorticoid) and compared how different types of antidepressants affected dams and adult male and female offspring. In chapter 2, maternal postpartum FLX prevented CORT-induced disruptions in maternal care but was unable to prevent CORT-induced depressive-like behaviour or reductions in hippocampal neurogenesis. In chapter 3, maternal postpartum FLX increased anxiety-like behaviour, impaired hypothalamic-pituitary-adrenal (HPA) axis negative feedback, and increased hippocampal neurogenesis in adult male but not female offspring. In chapter 4, maternal exercise did not prevent CORT-induced disruptions in maternal care but it prevented CORT-induced depressive-like behaviour and increased hippocampal neurogenesis. While neither antidepressant alone increased maternal neurogenesis, the combination of both treatments increased neurogenesis. In chapter 5, maternal exercise increased hippocampal neurogenesis in dorsal hippocampus but maternal postpartum FLX reduced it. However, exposure to maternal postpartum FLX prevented the neurogenic effect of maternal exercise. Maternal exercise facilitated HPA axis negative feedback in males but impaired in females. Collectively, these data indicate that antidepressants can have dynamic effects on endophenotypes of PPD, emphasizing the need for further research in PPD. Furthermore, male and female offspring development is differentially sensitive to these maternal antidepressant interventions, highlighting the importance of studying sex differences in neurodevelopment.
Towards implementable recommendations: taking advantage of the SHARC open science survey.
Creators: name: Grattarola, Florencia
name: Shmagun, Hanna
name: Erdmann, Chris
name: Mabile, Laurence
name: Cambon-Thomsen, Anne
name: Thomsen, Mogens
Publisher: name: Zenodo
Year: 2023

description: The session organised by the SHARC RDA Interest Group (affiliated with PARSEC) was an interactive discussion focused on a first draft of recognition guidance & recommendations towards various stakeholders proposed by the SHARC ig. Discussion & feedback from the audience helped  identify some gaps, provided useful examples of ongoing initiatives/policies in the academic rewarding system, and some ideas on how to reach out actively the various actors needed.
Key outcomes/actions/takeaways

The audience confirmed that rewarding schemes for OS activities, esp. data sharing, is needed.
Rewarding pathways are not well known and guidance would help.
Need to create recommendations as a global picture including all stakeholders, not separately.
description: This research is a product of the PARSEC group funded by the Belmont Forum as part of its Collaborative Research Action (CRA) on Science-Driven e-Infrastructures Innovation (SEI) with funding from the ANR, FAPESP, NSF and JST with the synthesis centre CESAB of the French Foundation for Research on Biodiversity.
Quantum behavior of a many photons cavity field revealed by quantum discord
Creators: name: Rossatto, D. Z.
name: Werlang, T.
name: Duzzioni, E. I.
name: Villas-Boas, C. J.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We investigate the quantum-to-classical crossover of a dissipative optical cavity mode based on measurement of the correlations between two atoms which do not interact with each other, but interact with the cavity mode. Firstly, we note that there is a time window where the mode has a classical behavior, which depends on the cavity decay rate, the atom-field coupling strength and the number of atoms. Then, considering only two atoms inside the cavity and working in the steady state of the system, we note that the entanglement between the atoms disappears with the increasing the mean number of photons of the cavity field (n). However, the quantum discord reaches an asymptotic non-zero value, even in the limit of n\rightarrow \infty. This happens either by increasing n coherently (applying a coherent driving field) or incoherently (raising the temperature of the reservoir coupled to the cavity mode). Therefore, the cavity mode, which is quantum by construction, always preserves its quantum behavior in the asymptotic limit and this is revealed only by the quantum discord.
Collective velocity broadening from gravity waves as a plausible mechanism for macroturbulence in massive stars
Creators: name: Bowman, D. M.
name: Burssens, S.
name: Simón-Díaz, S.
name: Edelmann, P. V. F.
name: Rogers, T. M.
name: Horst, L.
name: Röpke, F. K.
name: Aerts, C.
Publisher: name: Zenodo
Year: 2021
Subjects: asteroseismology
stars: oscillations (including pulsations)
stars: massive
stars: early-type
stars: evolution
stars: rotation

description: Almost all massive stars end their lives as supernovae and form a black hole or neutron star, which consequently drive galactic evolution. However there are currently large uncertainties pertaining to massive star interiors already during the main sequence, such as their interior mixing and rotation. Asteroseismology of gravity waves in massive stars provides a unique insight of the physics beneath their opaque surface layers. All massive stars are predicted to excite gravity waves from core convection and from turbulent pressure fluctuations in their near-surface layers, which are extremely efficient at transporting angular momentum and mixing within stellar interiors. On the other hand, spectroscopy provides detailed constraints on the physics of stellar atmospheres, and reveals the importance of increasing macroturbulent broadening in the spectral lines of more massive stars. In this talk, I will discuss recent results based on the combination of high-precision TESS space photometry and high-resolution spectroscopy of massive stars. A clear relationship is found between the location of a massive star in the Hertzsprung-Russell diagram and the amplitudes and frequencies of stochastic photometric variability caused by gravity waves in the light curves of massive stars. Furthermore, the properties of the stochastic variability are strongly correlated with macroturbulent broadening in the spectral lines of massive stars. The common ensemble morphology for the stochastic low-frequency variability detected in TESS photometry and its relationship to macroturbulence is strong evidence for gravity waves being a plausible mechanism for macroturbulence in massive stars, as such waves are unique in providing the dominant tangential velocity field required to explain the observed spectroscopy. Finally, I will discuss the important similarities and differences between magnetic and non-magnetic massive stars in terms of their gravity wave signatures and measured macroturbulent velocities.
description: {"references": ["Bowman, D. M., et al. 2019, A&A, 621, A135", "Bowman, D. M., et al. 2019, NatAs, 3, 760", "Bowman, D. M., et al. 2020, A&A, 640, A36"]}
Effect of oxygen plasma etching on graphene studied with Raman spectroscopy and electronic transport
Creators: name: Childres, Isaac
name: Jauregui, Luis A.
name: Tian, Jifa
name: Chen, Yong P.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We report a study of graphene and graphene field effect devices after exposure to a series of short pulses of oxygen plasma. We present data from Raman spectroscopy, back-gated field-effect and magneto-transport measurements. The intensity ratio between Raman "D" and "G" peaks, I(D)/I(G) (commonly used to characterize disorder in graphene) is observed to increase approximately linearly with the number (N(e)) of plasma etching pulses initially, but then decreases at higher Ne. We also discuss implications of our data for extracting graphene crystalline domain sizes from I(D)/I(G). At the highest Ne measured, the "2D" peak is found to be nearly suppressed while the "D" peak is still prominent. Electronic transport measurements in plasma-etched graphene show an up-shifting of the Dirac point, indicating hole doping. We also characterize mobility, quantum Hall states, weak localization and various scattering lengths in a moderately etched sample. Our findings are valuable for understanding the effects of plasma etching on graphene and the physics of disordered graphene through artificially generated defects.
description: 10 pages, 5 figures
Emmanuel Alloa, Partages de la perspective
Creators: name: Valaouris, Michalis
Publisher: name: 21: Inquiries into Art, History, and the Visual
Year: 2022

description: 21: Inquiries into Art, History, and the Visual, Bd. 2 Nr. 4 (2021): 21: Inquiries into Art, History, and the Visual. Beiträge zur Kunstgeschichte und visuellen Kultur
Queen dominance and worker policing control reproduction in a threatened ant
Creators: name: Trettin, Jürgen
name: Haubner, Monika
name: Buschinger, Alfred
name: Heinze, Jürgen
Publisher: name: Universität Regensburg
Year: 2011
Subjects: subject: 590 Tiere (Zoologie)

description: BACKGROUND: Efficient division of reproductive labor is a crucial characteristic of social insects and underlies their ecological and evolutionary success. Despite of the harmonious appearance of insect societies, nestmates may have different interests concerning the partitioning of reproduction among group members. This may lead to conflict about reproductive rights. As yet, few studies have investigated the allocation of reproduction among queens in multi - queen societies ("reproductive skew"). In the ant Leptothorax acervorum, reproductive skew varies considerably among populations. While reproduction is quite equally shared among nestmate queens in most populations from boreal Eurasia (low skew), colonies from populations at the edge of the species' range are characterized by "functional monogyny," i.e., high skew. The proximate mechanisms underlying high skew, in particular how workers influence which queen lays eggs, are not well understood. We investigated the behavior of queens and workers in functionally monogynous colonies of L. acervorum from two mountain ranges in central Spain. RESULTS: We provide evidence for both queen and worker influence on the outcome of conflict over reproduction in colonies of L. acervorum from Spain. The patterns of queen - queen aggression and worker - queen grooming and feeding after hibernation allowed predicting, which queen later began to lay eggs. In contrast, worker aggression towards queens was not clearly associated with a queen's future reproductive success. Queen - queen and worker - queen aggression differed in quality: queens typically engaged in ritualized dominance behavior, such as antennal boxing, while workers also attacked queens by biting and prolonged pulling on their legs and antennae. In several cases, overt worker aggression led to the expulsion of queens from the nest or their death. CONCLUSION: We conclude that queens of L. acervorum from Spain establish rank orders by ritualized dominance interactions, such as antennal boxing. Workers may reinforce these hierarchies by preferentially feeding and grooming high ranking queens and attacking lower ranking queens. Aggressive worker policing may thus stabilize functional monogyny. Optimal skew models predict that high skew in ants is associated with high dispersal costs. In central Spain, L. acervorum is restricted to small patches at higher elevations, which presumably makes dispersal and colony founding difficult. Because of the ecological requirements of L. acervorum and the predicted large impact of global change on central Spain, the functionally monogynous populations of this ant must be considered as threatened.
Strongly quadrature-dependent noise in superconducting micro-resonators measured at the vacuum-noise limit
Creators: name: Gao, J.
name: Vale, L. R.
name: Mates, J. A. B.
name: Schmidt, D. R.
name: Hilton, G. C.
name: Irwin, K. D.
name: Mallet, F.
name: Castellanos-Beltran, M. A.
name: Lehnert, K. W.
name: Zmuidzinas, J.
name: Leduc, H. G.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We measure frequency- and dissipation-quadrature noise in superconducting lithographed microwave resonators with sensitivity near the vacuum noise level using a Josephson parametric amplifier. At an excitation power of 100~nW, these resonators show significant frequency noise caused by two-level systems. No excess dissipation-quadrature noise (above the vacuum noise) is observed to our measurement sensitivity. These measurements demonstrate that the excess dissipation-quadrature noise is negligible compared to vacuum fluctuations, at typical readout powers used in micro-resonator applications. Our results have important implications for resonant readout of various devices such as detectors, qubits and nano-mechanical oscillators.
description: 13 pages, 4 figures
Francisco Prado-Vilar (ed.), El Pórtico de la Gloria. Architectura, materia y visión / The Portal of Glory. Architecture, Matter, and Vision
Creators: name: Rüffer, Jens
Publisher: name: 21: Inquiries into Art, History, and the Visual
Year: 2022

description: 21: Inquiries into Art, History, and the Visual, Bd. 2 Nr. 4 (2021): 21: Inquiries into Art, History, and the Visual. Beiträge zur Kunstgeschichte und visuellen Kultur
A weakly stable algorithm for general Toeplitz systems
Creators: name: Bojanczyk, Adam W.
name: Brent, Richard P.
name: de Hoog, Frank R.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics
subject: F.2.1
subject: 65F05 (Primary) 15B05, 65G50 (Secondary)

description: We show that a fast algorithm for the QR factorization of a Toeplitz or Hankel matrix A is weakly stable in the sense that R^T.R is close to A^T.A. Thus, when the algorithm is used to solve the semi-normal equations R^T.Rx = A^Tb, we obtain a weakly stable method for the solution of a nonsingular Toeplitz or Hankel linear system Ax = b. The algorithm also applies to the solution of the full-rank Toeplitz or Hankel least squares problem.
description: 17 pages. An old Technical Report with postscript added. For further details, see http://wwwmaths.anu.edu.au/~brent/pub/pub143.html
Hanneke Grootenboer, The Pensive Image. Art as a Form of Thinking
Creators: name: Sapir, Itay
Publisher: name: 21: Inquiries into Art, History, and the Visual
Year: 2022

description: 21: Inquiries into Art, History, and the Visual, Bd. 2 Nr. 4 (2021): 21: Inquiries into Art, History, and the Visual. Beiträge zur Kunstgeschichte und visuellen Kultur
Die rationale Synthese und strukturelle Charakterisierung schwefelreicher Phosphorpolysulfide - α-P2S7 und β-P2S7
Creators: name: Rödl, Thomas
name: Weihrich, Richard
name: Wack, Julia
name: Senker, Jürgen
name: Pfitzner, Arno
Publisher: name: Universität Regensburg
Year: 2011
Subjects: subject: 540 Chemie

description: Article first published online: 26 SEP 2011
Neutrino oscillations with disentanglement of a neutrino from its partners
Creators: name: Ahluwalia, D. V.
name: Horvath, S. P.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We bring attention to the fact that in order to understand existing data on neutrino oscillations, and to design future experiments, it is imperative to appreciate the role of quantum entanglement. Once this is accounted for, the resulting energy-momentum conserving phenomenology requires a single new parameter related to disentanglement of a neutrino from its partners. This parameter may not be CP symmetric. We illustrate the new ideas, with potentially measurable effects, in the context of a novel experiment recently proposed by Gavrin, Gorbachev, Veretenkin, and Cleveland. The strongest impact of our ideas is on the resolution of various anomalies in neutrino oscillations and on neutrino propagation in astrophysical environments.
description: 6 pages
Ulrich Pfisterer, Kunstgeschichte zur Einführung
Creators: name: Von Falkenhausen, Susanne
Publisher: name: 21: Inquiries into Art, History, and the Visual
Year: 2022

description: 21: Inquiries into Art, History, and the Visual, Bd. 2 Nr. 4 (2021): 21: Inquiries into Art, History, and the Visual. Beiträge zur Kunstgeschichte und visuellen Kultur
Engendering unification : family law and women's legal subjectivity in Southern Yemen
Creators: name: Baobeid, Iman
Publisher: name: University of British Columbia
Year: 2018

description: This thesis examines the shifts in Family Law and the production of ‘women’ as legal subjects in the context of the unification of North and South Yemen in the 1990s. Two legal codes form the core of this research, the People’s Democratic Republic of Yemen’s (PDRY, ‘South Yemen’) pre-unification Family Law of 1974, and the unified Republic of Yemen’s (ROY) Personal Status Law of 1992. The shift from the PDRY Family Law to the ROY Personal Status Law redefined women’s place in the family and Yemeni society writ large through the deployment of Family Law as a key mechanism for social intervention in order to produce and regulate legible legal subjects. This study interrogates the production of women as legal subjects through analysis of the institutions of marriage and divorce, viewing them as mechanisms to delineate boundaries of action that define the Yemeni woman’s place and role in the nation-state. In the PDRY’s case, this was undertaken through the construction of the woman as a “mother” and “worker” that is assigned reproductive and productive duties, and the establishment of the nuclear family as a self-contained entity that operates as the “cornerstone” of society. Determinations of the woman’s ‘place’ in the PDRY nation-state revolved around discourses of modernity and secularism that nevertheless utilized the Islamic legal tradition in reformative and innovative ways that claimed to foreground gender equality while maintaining patriarchal power relations. I argue that this locked women into an altered state of gender inequity that was marked by a post-colonial and Marxist driven nationalism. On the other hand, the Personal Status Law of the unified ROY, which rooted itself in Shari’a and the Islamic legal tradition, defined and restricted the ‘woman’ as a legal subject through the institution of guardianship and the discourse of al’eshra al-ḥesna (good companionship) that established a marital relationship and familial structure that was inherently inequitable. Thus, “the woman” as subject becomes a critical symbol onto which the two nation-states cast visions of themselves, and the manner through which they laid claim to the Islamic legal tradition.
Quantum discord in finite XY chains
Creators: name: Ciliberti, L.
name: Rossignoli, R.
name: Canosa, N.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We examine the quantum discord between two spins in the exact ground state of finite spin 1/2 arrays with anisotropic XY couplings in a transverse field B. It is shown that in the vicinity of the factorizing field B_s, the discord approaches a common finite non-negligible limit which is independent of the pair separation and the coupling range. An analytic expression of this limit is provided. The discord of a mixture of aligned pairs in two different directions, crucial for the previous results, is analyzed in detail, including the evaluation of coherence effects, relevant in small samples and responsible for a parity splitting at B_s. Exact results for finite chains with first neighbor and full range couplings and their interpretation in terms of such mixtures are provided.
description: 9 pages, 6 figures
Universality of the Kondo Effect in Quantum Dots with Ferromagnetic Leads
Creators: name: Gaaß, Markus
name: Hüttel, Andreas K.
name: Kang, Kicheon
name: Weymann, Ireneusz
name: Delft, Jan van
name: Strunk, Christoph
Publisher: name: Universität Regensburg
Year: 2011
Subjects: subject: 530 Physik
subject: 73.23.Hk, 72.15.Qm, 72.25.-b, 73.63.Fg

description: We investigate quantum dots in clean single-wall carbon nanotubes with ferromagnetic PdNi-leads in the Kondo regime. Most of the Kondo resonances exhibit a splitting, which depends on the tunnel coupling to the leads and an external magnetic field B, but only weakly on the gate voltage. Using numerical renormalization group calculations, we demonstrate that all salient features of the data can be understood using a simple model for the magnetic properties of the leads. The magnetoconductance at zero bias and low temperature depends in a universal way on gμB(B-Bc)/kBTK, where TK is the Kondo temperature and Bc the external field compensating the splitting.
Bewertung neuer Verfahren zur Kühlung von Turbinenrotorschaufeln - Infrarotthermographie bei maschinenähnlichen Randbedingungen
Creators: name: Elfner, Maximilian
Publisher: name: Karlsruhe
Year: 2019
Subjects: Flugtriebwerke
Turbinenkühlung
Rotorschaufel
Infrarotthermographie
Kalibrierverfahren

description: Das Wachstum des zivilen Luftverkehrs bedeutet eine große Herausforderung für die Luftfahrtbranche. Nur durch effizientere Triebwerke können der spezifische Verbrauch von fossilen Energieträgern und die spezifischen Emissionen reduziert werden und so der Zugang zu Flugreisen für die wachsende Weltbevölkerung sichergestellt werden. Einen maßgeblichen Beitrag zur Steigerung der Effizienz kann die Optimierung der Kühlung von heißen Komponenten des Kerntriebwerks leisten. Gerade im thermisch hoch belasteten Bereich der ersten Turbinenstufen werden große Mengen an Kühlluft verwendet, die sich negativ auf den thermischen Wirkungsgrad auswirken.
Neue Kühlverfahren ermöglichen es, den Kühlluftbedarf bei gleichen Standzeiten der Bauteile zu verringern. Vor einem möglichen Einsatz müssen diese neuen Verfahren untersucht und ihre Leistungsfähigkeit bestimmt werden, vor allem die Vorhersage der Materialtemperatur der Schaufeln muss hoch präzise erfolgen.

Die vorliegende Arbeit präsentiert neue Verfahren zur Kühlung von Rotorschaufeln. Es wird speziell auf die Drallkühlung eingegangen, die sich in grundlegenden Untersuchungen und in Verbindung mit den sich rapide verbessernden Möglichkeiten der additiven Fertigung als vielversprechendes Verfahren herausgestellt hat.
Zur Beurteilung der neuen Konzepte werden Untersuchungen durchgeführt, bei denen die wichtigen strömungsmechanischen Ähnlichkeitskennzahlen der Maschine eingehalten werden. So können die Ergebnisse unmittelbar auf den Einsatz im Triebwerk übertragen werden. Die Untersuchungen bedeuten eine Herausforderung für die als Messtechnik eingesetzte Infrarotthermographie. Neue Kalibrierverfahren werden entwickelt und überprüft. Durch Anwendung dieser Verfahren kann die Oberflächentemperatur der Prüflinge hoch genau bestimmt werden.
Anhand der mit den neuen Verfahren bestimmten Verteilung der Oberflächentemperatur und weiteren aerodynamischen Messungen werden abschließend Empfehlungen formuliert, wie ein auf Drallkühlung basierendes Kühlsystem für Turbinenrotorschaufeln leistungsfähiger werden kann und so die geforderte Lebensdauer dieser Bauteile sicherstellen kann.
Experimental protocol for MapEval4OceanHeat, an objective assessment of mapping methods used to estimate ocean heat content change
Creators: name: Giglio, Donata
name: Monselesan, Didier
name: Palmer, Matthew
Publisher: name: Zenodo
Year: 2023

description: Knowledge of the spatio-temporal evolution of ocean heat content (OHC) is essential to our understanding of both past and future climate change. At global scales, ocean heat uptake is a key element of the global energy and sea level budgets and provides a powerful constraint on climate sensitivity and past climate forcings. At regional scales, OHC changes are important to our understanding of climate variability and for the development, initialization, and evaluation of seasonal-to-decadal prediction systems. However, international intercomparison efforts have repeatedly shown large spread in both global OHC change and the spatial patterns of change over the past decades estimated by various research groups. 
Building on previous intercomparison efforts and motivated by successful "proof-of-concept" studies, the MapEval4OceanHeat initiative will carry out an objective assessment of mapping methods based on "synthetic" ocean observations from high-resolution climate and ocean modelling systems. Through collaboration with the international research community, MapEval4OceanHeat will evaluate the strengths and limitations of contemporary mapping approaches and assess our ability to constrain OHC change at global and regional scales. 
This document summarizes the experimental protocol for an intercomparison of mapping methods based on "synthetic profiles". The synthetic profiles are model analogues of the real-world EN4 temperature profile observations that have been extracted from a 1/10th degree ocean model simulation. The plan is that different mapping methods are used to interpolate the synthetic profiles for a given depth layer and the results inter-compared to further our understanding of the different capabilities/limitations of each method, including the associated uncertainties (where available). Ultimately, a series of monthly 2D maps of ocean heat content anomaly produced by each mapping method will be compared to the model "truth" field (this field will be withheld until after the mapping exercise has been completed). The following text outlines the technical details of the protocol, including specifying the preferred data format for receiving the mapped ocean heat content anomaly fields.
Upper Cumberland River Basin in Kentucky
Creators: name: Carey, Daniel I.
Publisher: name: Kentucky Geological Survey, University of Kentucky
Year: 2009

description: Abstract:
The Upper Cumberland River Basin covers over 7,300 square miles, 5,180 in Kentucky and 2,130 in Tennessee. All or parts of 20 Kentucky counties lie in the basin. The basin contains nearly 15,100 miles of streams, 10,430 in Kentucky and 4,640 in Tennessee. From the headwaters of Looney Creek in Harlan County, 4,100 feet above sea level, and the Poor Fork in Letcher County, runoff flows down the Upper Cumberland River west to an elevation of 460 feet at the Kentucky-Tennessee line. The river and its tributaries are a blessing and a bane: They provide for recreation, drinking water, and alluvial valleys for development and agriculture, but they also occasionally flood, causing damage to the unprepared.
Residents of Kentucky draw about 38 million gallons of water per day from streams and reservoirs in the basin. On average, about 6,300 million gallons per day (mgd) flow out of the basin, but about once every 10 years, only 55 mgd will flow for a week. This variability in flow affects water users and stream life.
More than 600 miles of assessed streams in the basin do not support designated uses for warm-water aquatic habitat, fish consumption, primary contact recreation, or secondary contact recreation. Not all streams have been assessed. The percentage of assessed streams not supporting uses was: warm-water aquatic habitat (37%); fish consumption (12%); primary contact recreation (65%); secondary contact recreation (50%). Nearly 400 miles of streams have been declared special use waters: either exceptional waters or reference reach waters.
There are six remediation priority watersheds including 370 square miles: primary impacts are nutrients, pathogens, habitat alteration, low dissolve oxygen, turbidity, and pH caused by construction and development, silviculture, mining, and agriculture.
There are 11 large man-made lakes in the basin, ranging from the 40-acre Chenoa Lake to the 50,000-acre Lake Cumberland, one of the largest east of the Mississippi River.
There are nearly 800 square miles of public land in the basin, with scenic vistas, trails, wild rivers, and unique rock formations. The Daniel Boone National Forest covers nearly 500 square miles.
Endothelium-dependent vasoconstriction in isolated vessel grafts: a novel mechanism of vasospasm?
Creators: name: Hoenicka, Markus
name: Keyser, Andreas
name: Rupprecht, Leopold
name: Puehler, Thomas
name: Hirt, Stephan
name: Schmid, Christof
Publisher: name: Universität Regensburg
Year: 2011
Subjects: subject: 570 Biowissenschaften, Biologie
subject: 610 Medizin

description: YC-1-induced vasoconstriction demonstrates the existence of an endothelium-dependent vasoconstrictor pathway in the blood vessels of patients with CAD that to date has been described only in animal models of hypertension. Patients with CAD who have elevated plasma levels of endothelin-1 are thus prone to endothelium-dependent vasoconstriction, which may also play a role in vasospasm in vascular grafts.
Stochastic Simulation of Process Calculi for Biology
Creators: name: Phillips, Andrew
name: Lakin, Matthew
name: Paulevé, Loïc
Publisher: name: arXiv
Year: 2010
Subjects: subject: Programming Languages (cs.PL)
subject: Computational Engineering, Finance, and Science (cs.CE)
subject: Quantitative Methods (q-bio.QM)
subject: FOS: Computer and information sciences
subject: FOS: Biological sciences

description: Biological systems typically involve large numbers of components with complex, highly parallel interactions and intrinsic stochasticity. To model this complexity, numerous programming languages based on process calculi have been developed, many of which are expressive enough to generate unbounded numbers of molecular species and reactions. As a result of this expressiveness, such calculi cannot rely on standard reaction-based simulation methods, which require fixed numbers of species and reactions. Rather than implementing custom stochastic simulation algorithms for each process calculus, we propose to use a generic abstract machine that can be instantiated to a range of process calculi and a range of reaction-based simulation algorithms. The abstract machine functions as a just-in-time compiler, which dynamically updates the set of possible reactions and chooses the next reaction in an iterative cycle. In this short paper we give a brief summary of the generic abstract machine, and show how it can be instantiated with the stochastic simulation algorithm known as Gillespie's Direct Method. We also discuss the wider implications of such an abstract machine, and outline how it can be used to simulate multiple calculi simultaneously within a common framework.
description: In Proceedings MeCBIC 2010, arXiv:1011.0051
Weakly-bound rare isotopes with a coupled-channel approach that includes resonant levels
Creators: name: Canton, L
name: Fraser, P R
name: Svenne, J P
name: Amos, K
name: Karataglidis, S
name: van der Knijff, D
Publisher: name: arXiv
Year: 2010
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The question of how the scattering cross section changes when the spectra of the colliding nuclei have low-excitation particle-emitting resonances is explored using a multi-channel algebraic scattering (MCAS) method. As a test case, the light-mass nuclear target 8Be, being particle-unstable, has been considered. Nucleon-nucleus scattering cross sections, as well as the spectra of the compound nuclei formed, have been determined from calculations that do, and do not, consider particle emission widths of the target nuclear states. The resonant character of the unstable excited states introduces a problem because the low-energy tails of these resonances can intrude into the sub-threshold, bound-state region. This unphysical behaviour needs to be corrected by modifying, in an energy-dependent way, the shape of the target resonances from the usual Lorentzian one. The resonance function must smoothly reach zero at the elastic threshold. Ways of achieving this condition are explored in this paper.
description: Contribution presented at INPC 2010, Vancouver
Stripe charge ordering in SrO-terminated SrTiO3(001) surfaces
Creators: name: Iwaya, Katsuya
name: Shimizu, Ryota
name: Ohsawa, Takeo
name: Hashizume, Tomihiro
name: Hitosugi, Taro
Publisher: name: arXiv
Year: 2011
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The local electronic structure of the SrO-terminated SrTiO3(001) surface was explored using scanning tunneling microscopy. At low bias voltages in the empty states, a unidirectional structure with a periodicity of 3 unit cells, superimposed on a c(2 x 2) reconstructed structure, was found to develop along the crystallographic a axis. This structure indicates a charge-ordered stripe induced by carrier doping from oxygen vacancies in the SrO and the subsurface TiO2 planes. In the filled states, localized deep in-gap states were observed in addition to large energy gaps in the tunneling spectra. This result represents inelastic tunneling due to significant electron-lattice interaction associated with unidirectional lattice distortion in the SrO-terminated surface.
description: 6 pages, 5 figures, accepted for publication in PRB
Trends in bulk electron-structural features of early transition-metal carbides
Creators: name: Vojvodic, Aleksandra
name: Ruberto, Carlo
Publisher: name: arXiv
Year: 2010
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: A detailed and systematic density-functional theory (DFT) study of a series of early transition-metal carbides (TMC's) in the NaCl structure is presented. The focus is on the trends in the electronic structure and nature of bonding, which are essential for the understanding of the reactivity of TMC's. The employed approach is based on a thorough complementary analysis of the electron density differences, the density of states (DOS), the band structure, and the real-space wave functions to gain insight into the bonding of this class of materials and get a more detailed picture of it than previously achieved, as the trend study allows for a systematic identification of the bond character along the different bands. Our approach confirms the presence of both the well-known TM--C and TM--TM bonds and, more importantly, it shows the existence and significance of direct C--C bonds in all investigated TMC's, which are frequently neglected but have been recently identified in some cases [Solid State Commun. 121, 411 (2002); Phys. Rev. B 75, 235438 (2007)]. New information on the spatial extent of the bonds, their \textit{k}-space location within the band structure, and their importance for the bulk cohesion is provided. Trends in covalency and ionicity are presented. The resulting electron-structural trends are analyzed and discussed within a two-level model.
Verkehrte Welt am Hasenhaus in Wien
Creators: name: Hoppe-Münzberg, Esther
Publisher: name: 21: Inquiries into Art, History, and the Visual
Year: 2022

description: In the following article, I suggest to take a new look at an important property in Renaissance Vienna, more precisely at its façade painting. Although the building has been demolished almost 300 years ago, its extravagant exterior has repeatedly aroused the interest of historians and art historians. The appearance of its façade, which was elaborately repainted around 1550, is only attested to by a watercolour by Salomon Kleiner, painted shortly before the building was demolished in 1749. In addition to an interpretation of the painting’s content, this article is also the first attempt to assign the façade painting to a specific painter and his workshop: Heinrich Vogtherr the Elder. It can be shown that he was able to build on older decorative campaigns for the execution of the façade painting, but also used ideas and pictorial formulas from his own diverse production of prints.
description: 21: Inquiries into Art, History, and the Visual, Bd. 2 Nr. 4 (2021): 21: Inquiries into Art, History, and the Visual. Beiträge zur Kunstgeschichte und visuellen Kultur
Giant Magnetic Susceptibility in Fe and Co Epitaxial Films
Creators: name: Back, Christian
name: Würsch, C.
name: Kerkmann, D.
name: Pescia, D.
Publisher: name: Universität Regensburg
Year: 1994
Subjects: subject: 330 Wirtschaft

description: The static magnetic susceptibility of subnanometer thick Co and Fe films at the Curie temperature is enhanced by four orders of magnitude with respect to bulk samples.
Measurable Stochastics for Brane Calculus
Creators: name: Bacci, Giorgio
name: Miculan, Marino
Publisher: name: arXiv
Year: 2010
Subjects: subject: Computational Engineering, Finance, and Science (cs.CE)
subject: FOS: Computer and information sciences
subject: D.3.1; G.3

description: We give a stochastic extension of the Brane Calculus, along the lines of recent work by Cardelli and Mardare. In this presentation, the semantics of a Brane process is a measure of the stochastic distribution of possible derivations. To this end, we first introduce a labelled transition system for Brane Calculus, proving its adequacy w.r.t. the usual reduction semantics. Then, brane systems are presented as Markov processes over the measurable space generated by terms up-to syntactic congruence, and where the measures are indexed by the actions of this new LTS. Finally, we provide a SOS presentation of this stochastic semantics, which is compositional and syntax-driven.
description: In Proceedings MeCBIC 2010, arXiv:1011.0051
Rib-roughened heat and mass transfer enhancement in membrane-based energy recovery ventilators
Creators: name: Sylvester, Alexander
Publisher: name: University of British Columbia
Year: 2018

description: Energy Recovery Ventilators (ERVs) save energy by recovering sensible and latent heat from exhaust ventilation streams. They consist of compact channels in a cross- or counter-flow arrangement separated by moisture-permeable membranes. This work employs computational fluid dynamics with experimental validation to study angled rib mixing features to enhance heat and mass transport in membrane-based ERVs. The model simulates air-to-air heat and mass exchange between two rectangular ducts in a counter-flow arrangement. Local results from these simulations are used in a mathematical model to predict the effectiveness of a cross-flow ERV. The flow is steady and laminar. The channels are modeled with and without ribs for various channel aspect ratios and flow rates. Periodic inlet/outlet conditions are assumed for all cases to highlight the effect of the ribs. Ribs are either on the membrane surface or the opposite wall, however ribs on the membrane surface are the focus of this work due to their superior performance. Results show that the ribs increase the channel Sherwood and Nusselt numbers by a larger fraction than the corresponding increase in friction factor. The improvement is larger for sensible recovery than latent recovery because the membrane’s mass-transfer resistance is higher than its thermal resistance. For a typical commercial grade, counter-flow ERV, total effectiveness can be improved by over 10% for an equal pressure drop by adding ribs and slightly increasing the channel height. Mass-transfer and pressure drop results from the simulations were validated experimentally for channels with and without ribs using a commercially available membrane (dPoint Technologies). Ribs were either formed into the membrane surface or made as extensions of the channel wall. The experimental and simulation results agree with one another within the experimental uncertainty of the test apparatus and variability of the membrane permeability. Typically, ERV performance targets (recovery effectiveness, pressure drop) are met by varying the channel dimensions or number of channels. The work presented here indicates that angled ribs could be used instead, which would not require altering the ERV footprint or using extra materials.
Körper in Hüllen
Creators: name: Koos, Marianne
Publisher: name: 21: Inquiries into Art, History, and the Visual
Year: 2022

description: The article examines the agentiality of (English) Renaissance armour, unfolded in its performative handling, from an image-anthropological, gender-specific and material-semantic perspective. Armour is not only an instrument of protection and adornment for the (male) body, but can also be understood, specifically through the helmet, as a full-body mask, which both conceals and produces identities. The signs on this armour, this second skin, have a special significance, which, as Victor Stoichita has explained in regard to Alfred Gell, had the function – like tattoos on real skin (understood as symbolic armour) – of making the wearer doubly invulnerable. While Italian armour of the Renaissance was characterised by apotropaic figurations such as lions’ heads or the head of Medusa, English armour of the second half of the 16th century had ornamental elements etched into the steel. A particularly well preserved example of English armour is that of George Clifford, 3rd Earl of Cumberland (New York, Metropolitan Museum). The article examines the special signs on this armour and, taking into account Cumberland’s miniature portraits in lockable metal containers worn on the body, illuminates the charging of this artefact through operations of opening and closing, concealing and revealing. Against the background of the pronounced love cult at the court of Elizabeth I, Cumberland’s armour reveals itself not only as an instrument of male parade, but also as a gift of love (of the male body) to the queen, which is able to subvert and reconfigure traditional power relations in the complex network between the material artefact, the female ruler (at the same time adored lady) and the male favourite.
description: 21: Inquiries into Art, History, and the Visual, Bd. 2 Nr. 4 (2021): 21: Inquiries into Art, History, and the Visual. Beiträge zur Kunstgeschichte und visuellen Kultur
“Working the art world from within”
Creators: name: Magauer, Hanna
Publisher: name: 21: Inquiries into Art, History, and the Visual
Year: 2022

description: Focusing on an internationally little-known artistic scene in Paris, the essay addresses the text-based works of artists such as Lefevre Jean Claude, Philippe Cazal, Claude Rutault, and Philippe Thomas. To what extent is their turn to ambiguity and literary methods at the end of the 1970s shaped by their sociopolitical environment? In what way can it be understood as a link between first-generation institutional critique and 1990s relational practices? Can the motif of a critique “from within” be read socially in their works – as a strategy of artistic self-positioning? Offering an alternative to a reading via the lens of literature and language philosophy, the essay understands these works as network-based, as interlinked with the local and international structures of a competitive art field.
description: 21: Inquiries into Art, History, and the Visual, Bd. 2 Nr. 4 (2021): 21: Inquiries into Art, History, and the Visual. Beiträge zur Kunstgeschichte und visuellen Kultur
Ultrasonic attenuation measurements on crystals which display persistent nonphotochemical ir spectral hole burning
Creators: name: Lengfellner, Hans
name: Sievers, A. J.
Publisher: name: Universität Regensburg
Year: 1985
Subjects: subject: 530 Physik
subject: 62.80.+f
subject: 63.20.Mt

description: Temperature-dependent ultrasound-absorption measurements have been used to identify an ReO4 --induced loss peak in alkali halide crystals. The measured shape is consistent with an activation process with barrier energies of 60 meV for RbBr, 50 meV for KI, and 30 meV for RbI. The temperature dependence of the hopping time is compatible with the disappearance of the persistent ir spectral features of ReO4 - as the temperature is increased to 10 K.