cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Geochemical and radiogenic isotope records of the Weissert Event in south Tethyan sediments
Creators: name: Shmeit, M.
name: Chauvel, C.
name: Giraud, F.
name: Jaillard, E.
name: Reboulet, S.
name: Masrour, M.
name: Spangenberg, J. E.
name: El-Samrani, A.
Publisher: name: Geological Society of London
Year: 2022
Subjects: subject: Geology
subject: FOS: Earth and related environmental sciences

description: Fig. S6. Comparing the initial isotope ratios (i; 135 Ma) of Pb and Sr in the studied successions (Zalidou and Hole 416A) with surrounding possible source areas having reported these isotopes (see also Supplementary Table). The possible sources are the central Sahara Bodélé Depression (Abouchami et al. 2013), Saharan metacraton (Küster et al. 2008) and modern Sahel desert dusts (Kumar et al. 2014).
Instabilities, solitons, and rogue waves in PT-coupled nonlinear waveguides
Creators: name: Bludov, Yu. V.
name: Driben, R.
name: Konotop, V. V.
name: Malomed, B. A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Optics (physics.optics)
subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: We considered the modulational instability of continuous-wave backgrounds, and the related generation and evolution of deterministic rogue waves in the recently introduced parity-time (PT)-symmetric system of linearly-coupled nonlinear Schrödinger equations, which describes a Kerr-nonlinear optical coupler with mutually balanced gain and loss in its cores. Besides the linear coupling, the overlapping cores are coupled through cross-phase-modulation term too. While the rogue waves, built according to the pattern of the Peregrine soliton, are (quite naturally) unstable, we demonstrate that the focusing cross-phase-modulation interaction results in their partial stabilization. For PT-symmetric and antisymmetric bright solitons, the stability region is found too, in an exact analytical form, and verified by means of direct simulations.
description: accepted for Journal of Optics
Acaulospora flava, a new arbuscular mycorrhizal fungus from Coffea arabica and Plukenetia volubilis plantations at the sources of the Amazon river in Peru
Creators: name: Corazon-Guivin, Mike Anderson
name: Vallejos-Tapullima, Adela
name: De La Sota-Ricaldi, Ana Maria
name: Cerna-Mendoza, Agustín
name: Guerrero-Abad, Juan Carlos
name: Santos, Viviane
name: Alves Da Silva, Gladstone
name: Oehl, Fritz
Publisher: name: Journal of Applied Botany and Food Quality
Year: 2021

description: A new arbuscular mycorrhizal fungus, Acaulospora flava, was found in coffee (Coffea arabica) and inka nut (Plukenetia volubilis) plantations in the Amazonia region of San Martín State in Peru. The fungus was propagated in bait cultures on Sorghum vulgare, Brachiaria brizantha and Medicago sativa as host plants. It differentiates typical acaulosporoid spores laterally on sporiferous saccule necks. The spores are light yellow, bright yellow to yellow brown, (95-)105-160 × (95-)100-150 μm in diameter and have smooth spore surfaces. Phylogenetically, A. flava clusters in a well-separated clade, nearest to A. kentinensis, followed by A. herrerae, A. spinosissima, A. excavata and A. aspera, of which remarkably A. spinosissima, A. excavata and A. aspera had also been found in inka nut plantations of San Martín State during the last years. Here, we report also A. herrerae and A. fragilissima as fungal symbionts within the rhizosphere of coffee and the inka nut. The later two fungi had so far been recorded by concomitant morphological and molecular analyses only from tropical islands, A. herrerae from Cuba in the Golf of Mexico and A. fragilissima from New Caledonia in the southwest Pacific Ocean close to Australia. In this study, the ITS region of A. herrerae was analyzed for the first time and deposited in the public databases. In total, we already recovered fourteen Acaulospora species from coffee and inka nut plantations in San Martín State of Peru, suggesting that Acaulospora species are frequent and beneficial symbionts in coffee and inka nut roots in San Martín State of Peru.
description: Journal of Applied Botany and Food Quality, Vol. 94 (2021): Journal of Applied Botany and Food Quality
Geochemical and radiogenic isotope records of the Weissert Event in south Tethyan sediments
Creators: name: Shmeit, M.
name: Chauvel, C.
name: Giraud, F.
name: Jaillard, E.
name: Reboulet, S.
name: Masrour, M.
name: Spangenberg, J. E.
name: El-Samrani, A.
Publisher: name: Geological Society of London
Year: 2022
Subjects: subject: Geology
subject: FOS: Earth and related environmental sciences

description: Fig. S4. 206/204Pb(m)) v. 207/204Pb(m) plot (m: measured isotope ratios); dashed line in red corresponds to the trendline from both sections combined (y=0.0747x + 14.286, r2=0.5439, 1.06 Ga). The linear function for Zalidou samples is y=0.0777x + 14.229, r2=0.8673 (1.14 Ga) and for Hole 416A samples is y=0.0719x + 14.34, r2=0.4439 (990 Ma).
Climate Coffee with Mark Payne | An experiment in climate service portability: A Danish Climate Atlas in Ghana
Creators: name: Payne, Mark
Publisher: name: Zenodo
Year: 2023

description: This presentation was given during the a Climate Coffee online on 16 November 2023 with Mark Payne on "An experiment in climate service portability: A Danish Climate Atlas in Ghana". 
Climate Coffees are short (circa 40 min: 20 min talk + 20 min Q&A), relaxed meetings for scientists to share ideas, discuss methods and communicate new results. They are open to speakers of all levels of seniority, we especially encourage early-career scientists to become a speaker. The Coffees are an exciting opportunity for scientists to build a network and disseminate recent results, peer-to-peer. We invite researchers from across the climate science community to join us for this series of regular online knowledge exchange events. 
The Climate Coffees are organized by the Horizon Europe project OCEAN:ICE, the Danish Meteorological Institute and the European Climate Research Alliance. 
Sign up for our newsletter: https://ecra-climate.us20.list-manage... 
Check out past and upcoming Climate Coffees here: https://ocean-ice.eu/climate-coffees/
Dynamic parity recovery in a strongly driven Cooper-pair box
Creators: name: de Graaf, S. E.
name: Leppäkangas, J.
name: Adamyan, A.
name: Danilov, A. V.
name: Lindström, T.
name: Fogelström, M.
name: Bauch, T.
name: Johansson, G.
name: Kubatkin, S. E.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We study a superconducting charge qubit coupled to an intensive electromagnetic field and probe changes in the resonance frequency of the formed dressed states. At large driving strengths, exceeding the qubit energy-level splitting, this reveals the well known Landau-Zener-Stuckelberg (LZS) interference structure of a longitudinally driven two-level system. For even stronger drives we observe a significant change in the LZS pattern and contrast. We attribute this to photon-assisted quasiparticle tunneling in the qubit. This results in the recovery of the qubit parity, eliminating effects of quasiparticle poisoning and leads to an enhanced interferometric response. The interference pattern becomes robust to quasiparticle poisoning and has a good potential for accurate charge sensing.
description: 5 pages, 4 figures
Higher Spin Currents with Arbitrary N in the N=1 Stringy Coset Minimal Model
Creators: name: Ahn, Changhyun
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In the N=1 supersymmetric coset model based on (A_{N-1}^{(1)} \oplus A_{N-1}^{(1)}, A_{N-1}^{(1)}) at level (k, N), the lowest N=1 higher spin supercurrent with spins-(5/2, 3), in terms of two independent numerator WZW currents, is reviewed. By calculating the operator product expansions (OPE) between this N=1 higher spin supercurrent and itself, the next two N=1 higher spin supercurrents can be generated with spins-(7/2, 4) and (4, 9/2). These four currents are polynomials of degree 3, 4, 4, 4 in the first numerator WZW currents with level k. The complete nonlinear OPE of the lowest N=1 higher spin supercurrent for general N is obtained. The three-point functions involving two scalar primaries with one spin-2 current or spin-3 current are calculated in the large N limit for all values of the 't Hooft coupling. In particular, the light states that appeared in the case when the second level was fixed by 1 are no longer light ones because the eigenvalues are finite in the large N limit.
description: 56 pages
title: Factors that affect Chinese teachers’ use of the L1 and TL at tertiary level: an investigation from sociolinguistic perspective
Creators: name: Guo, JunLiang
Publisher: name: University of Glasgow
Year: 2021

description: Communicative Language Teaching (CLT) has been dominantly advocated in various educational contexts for many years. A number of countries promoted CLT in their English curricula, and the development of students’ communicative competence has become increasingly important in the era of globalisation. It is because people from different areas in the world are increasingly interconnected and communicative competence entails international sensitivities to communication needs of global citizens. Emergence of English as a global language and the changing situation of English learning have been acknowledged globally. However, there appears to be increasing resistances against the implementation of CLT in countries like China, Japan and Vietnam. This study is a timely research that revisits English Language Teaching (ELT) in China with the focus on Chinese teachers’ use of the Target Language (TL) and First Language (L1). The purpose is to have an in-depth look at the factors that affect Chinese teachers’ use of the TL and L1 in College English classes. The current study took place in a regional university in China. The research methods employed included 53 Classroom Observations, 4 teachers’ interviews and 4 students’ focus-group interviews, and document analysis. The findings suggest multiple resistances existing in the current research site and call for changes that should be made from different dimensions within the context.
Geochemical and radiogenic isotope records of the Weissert Event in south Tethyan sediments
Creators: name: Shmeit, M.
name: Chauvel, C.
name: Giraud, F.
name: Jaillard, E.
name: Reboulet, S.
name: Masrour, M.
name: Spangenberg, J. E.
name: El-Samrani, A.
Publisher: name: Geological Society of London
Year: 2022
Subjects: subject: Geology
subject: FOS: Earth and related environmental sciences

description: Fig. S3. Trace elements normalized to the upper continental crust values of Rudnick and Gao (2013). (a) In Zalidou, a strong enrichment is observed for Zr (avg. 1.55), Hf (avg. 1.67) and Li (avg. 1.92). (b) In Hole 416A, depletions are observed for Zr (avg. 0.71) and Hf (avg. 0.71); also, a weak enrichment is observed for Cs (avg. 1.42) and Rb (avg. 1.38), and a strong enrichment is observed for Li (avg. 3.66). These are caused by the chemical fractionation of elements occurring during the transport of sediment.
Geochemical and radiogenic isotope records of the Weissert Event in south Tethyan sediments
Creators: name: Shmeit, M.
name: Chauvel, C.
name: Giraud, F.
name: Jaillard, E.
name: Reboulet, S.
name: Masrour, M.
name: Spangenberg, J. E.
name: El-Samrani, A.
Publisher: name: Geological Society of London
Year: 2022
Subjects: subject: Geology
subject: FOS: Earth and related environmental sciences

description: Fig. S1. Geographic location of DSDP Leg 50 Hole 416A (red star). The onshore Essaouira-Agadir Basin (EAB) is identified in the red rectangle. Modified from Čepek and Gartner (1980) by Shmeit et al. (2022).
A one-dimensional tunable magnetic metamaterial
Creators: name: Butz, S.
name: Jung, P.
name: Filippenko, L. V.
name: Koshelets, V. P.
name: Ustinov, A. V.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We present experimental data on a one-dimensional superconducting metamaterial that is tunable over a broad frequency band. The basic building block of this magnetic thin-film medium is a single-junction (rf-) superconducting quantum interference device (SQUID). Due to the nonlinear inductance of such an element, its resonance frequency is tunable in situ by applying a dc magnetic field. We demonstrate that this results in tunable effective parameters of our metamaterial consisting of 54 SQUIDs. In order to obtain the effective magnetic permeability from the measured data, we employ a technique that uses only the complex transmission coefficient S21.
title: Double Plating for Complex Proximal Humeral Fractures: Clinical and Radiological Outcomes
Creators: name: Michel, Philipp
name: Raschke, Michael J.
name: Katthagen, J. Christoph
name: Schliemann, Benedikt
name: Reißberg, Isabelle Juliette
name: Riesenbeck, Oliver
Publisher: name: University of Muenster, Institutional Repository MIAMI
Year: 2023
Subjects: subject: 610 Medicine and health

description: Double plating for proximal humeral fractures (PHF) is an option to increase the primary fixation stability. Clinical data is missing for assessment of clinical and radiological outcome, as well as complications. We retrospectively examined 35 patients with unilateral PHF, who were treated with double plating for PHF between 2013 and 2019. The mean age was 59.5 ± 12 years and the leading fracture type was a varus dislocation (Resch type IV in 55.3%). A head-split was present in 22.9% of the cases. The primary outcome measurement was the radiological neck shaft angle (NSA). The radiological follow-up was 21 ± 16.6 months and the NSA did not differ between the intraoperative and follow-up time point (131.5 ± 6.9° vs. 136.6 ± 13.7°; p = 0.267). The clinical follow-up was 29.5 ± 15.3 months. The Constant-score was 78.5 ± 17 points, the simple-shoulder-test (SST) was 9.3 ± 3.2 points and the subjective shoulder value (SSV) was 78.8 ± 19.5%. The over-all complication rate was 31.4%, and without stiffness 14.3%. An avascular necrosis occurred in two patients (5.7%). In conclusion, this study shows good radiological and functional outcomes after double plating of highly complex proximal humeral fractures, while the complication rate is comparable to the literature. Double plating is a viable option especially for younger patients with complex fractures as a potential alternative to fracture arthroplasty.
description: Finanziert durch den Open-Access-Publikationsfonds der Universität Münster.
Blowup behavior of the Kahler-Ricci flow on Fano manifolds
Creators: name: Tosatti, Valentino
Publisher: name: arXiv
Year: 2012
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 53C44, 32Q20, 32Q15

description: We study the blowup behavior at infinity of the normalized Kahler-Ricci flow on a Fano manifold which does not admit Kahler-Einstein metrics. We prove an estimate for the Kahler potential away from a multiplier ideal subscheme, which implies that the volume forms along the flow converge to zero locally uniformly away from the same set. Similar results are also proved for Aubin's continuity method.
description: 10 pages; to appear in Univ. Iagel. Acta Math.; final version
Opportunities and criteria for a sustainability label. TAB-Fokus
Creators: name: Revermann, Christoph
name: Petermann, T.
name: Poetzsch, M.
Publisher: name: Büro für Technikfolgen-Abschätzung beim Deutschen Bundestag (TAB)
Year: 2015

description: In Germany, there is a confusing plethora of more than 1,000 product labels referring to health, sustainability, regionality, environmental protection, fair trade or similar aspects. In everyday practice, the orientation of consumers towards sustainability criteria implies a major information effort. An overall sustainability label shall provide consumers with reliable assistance in decision-making at the point of sale regarding the selection of sustainable products (and services) by communicating their sustainability characteristics in a credible, quick and understandable manner. Such a label could both strengthen consumer protection and promote sustainability of consumption and production. The question of whether a sustainability label is able to show these intended effects depends on all market players involved. Acceptance by producers and consumers’ confidence are indispensable prerequisites. However, it is a very special thematic, methodical and institutional challenge to integrate the complex concept of sustainability into a valid and transparent process of sustainability assessment and to implement a viable organizational model for an overall sustainability label.
Limits on spin-dependent WIMP-nucleon cross sections from 225 live days of XENON100 data
Creators: name: XENON100 Collaboration
name: Aprile, E.
name: Alfonsi, M.
name: Arisaka, K.
name: Arneodo, F.
name: Balan, C.
name: Baudis, L.
name: Bauermeister, B.
name: Behrens, A.
name: Beltrame, P.
name: Bokeloh, K.
name: Brown, A.
name: Brown, E.
name: Bruno, G.
name: Budnik, R.
name: Cardoso, J. M. R.
name: Chen, W. -T.
name: Choi, B.
name: Colijn, A. P.
name: Contreras, H.
name: Cussonneau, J. P.
name: Decowski, M. P.
name: Duchovni, E.
name: Fattori, S.
name: Ferella, A. D.
name: Fulgione, W.
name: Gao, F.
name: Garbini, M.
name: Ghag, C.
name: Giboni, K. -L.
name: Goetzke, L. W.
name: Grignon, C.
name: Gross, E.
name: Hampel, W.
name: Kaether, F.
name: Kish, A.
name: Lamblin, J.
name: Landsman, H.
name: Lang, R. F.
name: Calloch, M. Le
name: Lellouch, D.
name: Levy, C.
name: Lim, K. E.
name: Lin, Q.
name: Lindemann, S.
name: Lindner, M.
name: Lopes, J. A. M.
name: Lung, K.
name: Undagoitia, T. Marrodan
name: Massoli, F. V.
name: Fernandez, A. J. Melgarejo
name: Meng, Y.
name: Messina, M.
name: Molinario, A.
name: Ni, K.
name: Oberlack, U.
name: Orrigo, S. E. A.
name: Pantic, E.
name: Persiani, R.
name: Plante, G.
name: Priel, N.
name: Rizzo, A.
name: Rosendahl, S.
name: Santos, J. M. F. dos
name: Sartorelli, G.
name: Schreiner, J.
name: Schumann, M.
name: Lavina, L. Scotto
name: Scovell, P. R.
name: Selvi, M.
name: Shagin, P.
name: Simgen, H.
name: Teymourian, A.
name: Thers, D.
name: Vitells, O.
name: Wang, H.
name: Weber, M.
name: Weinheimer, C.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present new experimental constraints on the elastic, spin-dependent WIMP-nucleon cross section using recent data from the XENON100 experiment, operated in the Laboratori Nazionali del Gran Sasso in Italy. An analysis of 224.6 live days x 34 kg of exposure acquired during 2011 and 2012 revealed no excess signal due to axial-vector WIMP interactions with 129-Xe and 131-Xe nuclei. This leads to the most stringent upper limits on WIMP-neutron cross sections for WIMP masses above 6 GeV, with a minimum cross section of 3.5 x 10^{-40} cm^2 at a WIMP mass of 45 GeV, at 90% confidence level.
description: 5 pages, 3 figures; corrected caption of figure 3
The galaxy environment of a QSO at z ~ 5.7
Creators: name: Bañados, Eduardo
name: Venemans, Bram
name: Walter, Fabian
name: Kurk, Jaron
name: Overzier, Roderik
name: Ouchi, Masami
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: High-redshift quasars are believed to reside in massive halos in the early universe and should therefore be located in fields with overdensities of galaxies, which are thought to evolve into galaxy clusters seen in the local universe. However, despite many efforts, the relationship between galaxy overdensities and z~6 quasars is ambiguous. This can possibly be attributed to the difficulty of finding galaxies with accurate redshifts in the vicinity of z~6 quasars. So far, overdensity searches around z~6 quasars have been based on studies of Lyman break galaxies (LBGs), which probe a redshift range of Delta z ~ 1. This range is large enough to select galaxies that may not be physically related to the quasar. We use deep narrow- and broadband imaging to study the environment of the z=5.72 quasar ULAS J0203+0012. The redshift range probed by our narrow-band selection of Lyman alpha emitters (LAEs) is Delta z ~ 0.1, which is significantly narrower than the LBG searches. This is the first time that LAEs were searched for near a z~6 quasar, in an effort to provide clues about the environments of quasars at the end of the epoch of reionization. We find no enhancement of LAEs in the surroundings of ULAS J0203+0012 in comparison with blank fields. We explore different explanations and interpretations for this non-detection of a galaxy overdensity, including that (1) the strong ionization from the quasar may prevent galaxy formation in its immediate vicinity and (2) high-redshift quasars may not reside in the center of the most massive dark matter halos.
description: text updated to match published version
Sterile Neutrinos from Dark Matter: A $\nu$ Nightmare?
Creators: name: Morrison, Logan
name: Profumo, Stefano
name: Shakya, Bibhushan
Publisher: name: Deutsches Elektronen-Synchrotron, DESY, Hamburg
Year: 2022
Subjects: neutrino: right-handed: mass
neutrino: right-handed
neutrino: sterile
numerical calculations: Monte Carlo
dark matter: annihilation
neutrino: mass
photon: secondary
neutrino: decay
scale: TeV
positron
GeV
branching ratio
quark

description: We provide a comprehensive study of observable spectra from dark matter pair-annihilation or decay into sterile (right-handed) neutrinos. This occurs, for instance, in neutrino portal dark matter models, where a sterile neutrino acts as the portal between dark matter and the Standard Model sector. The subsequent decays of right-handed neutrinos produce detectable Standard Model particles, notably photons, positrons, and neutrinos. We study the phenomenology of models where the right-handed neutrino masses are below the GeV scale, as well as models where they are at, or significantly heavier than, the TeV scale. In both instances, and for different reasons, the standard tools, including Monte Carlo simulations, are both inadequate and inaccurate. We present the complete framework to compute the relevant branching ratios for right-handed neutrino decays and the spectra of secondary photons, positrons, and neutrinos for a broad range of dark matter and right-handed neutrino masses. We discuss the general features of such signals, and compare the spectra to standard signals from dark matter annihilation/decay into bottom quarks. Additionally, we provide open source code1 that can be used to compute such spectra. The code is available at https://github.com/LoganAMorrison/blackthorn.
Ice condensation as a planet formation mechanism
Creators: name: Ros, Katrin
name: Johansen, Anders
Publisher: name: arXiv
Year: 2013
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We show that condensation is an efficient particle growth mechanism, leading to growth beyond decimeter-sized pebbles close to an ice line in protoplanetary discs. As coagulation of dust particles is frustrated by bouncing and fragmentation, condensation could be a complementary, or even dominant, growth mode in the early stages of planet formation. Ice particles diffuse across the ice line and sublimate, and vapour diffusing back across the ice line recondenses onto already existing particles, causing them to grow. We develop a numerical model of the dynamical behaviour of ice particles close to the water ice line, approximately 3 AU from the host star. Particles move with the turbulent gas, modelled as a random walk. They also sediment towards the midplane and drift radially towards the central star. Condensation and sublimation are calculated using a Monte Carlo approach. Our results indicate that, with a turbulent alpha-value of 0.01, growth from millimeter to at least decimeter-sized pebbles is possible on a time scale of 1000 years. We find that particle growth is dominated by ice and vapour transport across the radial ice line, with growth due to transport across the atmospheric ice line being negligible. Ice particles mix outwards by turbulent diffusion, leading to net growth across the entire cold region. The resulting particles are large enough to be sensitive to concentration by streaming instabilities, and in pressure bumps and vortices, which can cause further growth into planetesimals. In our model, particles are considered to be homogeneous ice particles. Taking into account the more realistic composition of ice condensed onto rocky ice nuclei might affect the growth time scales, by release of refractory ice nuclei after sublimation. We also ignore sticking and fragmentation in particle collisions. These effects will be the subject of future investigations.
description: 15 pages, 11 figures. Accepted for publication in A&A
Soundness and Completeness of the NRB Verification Logic
Creators: name: Breuer, Peter T.
name: Pickin, Simon J.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Logic in Computer Science (cs.LO)
subject: FOS: Computer and information sciences
subject: B.1.2; D.2.4

description: This short paper gives a model for and a proof of completeness of the NRB verification logic for deterministic imperative programs, the logic having been used in the past as the basis for automated semantic checks of large, fast-changing, open source C code archives, such as that of the Linux kernel source. The model is a colored state transitions model that approximates from above the set of transitions possible for a program. Correspondingly, the logic catches all traces that may trigger a particular defect at a given point in the program, but may also flag false positives.
description: To appear in OpenCert 2013 Workshop, Sept 23, Madrid, 15p
The Cosmic Evolution of Gamma-Ray Burst Host Galaxies
Creators: name: Savaglio, S.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Due to their extreme luminosities, gamma-ray bursts (GRBs) can be detected in hostile regions of galaxies, nearby and at very high redshift, making them important cosmological probes. The investigation of galaxies hosting long-duration GRBs (whose progenitor is a massive star) demonstrated their connection to star formation. Still, the link to the total galaxy population is controversial, mainly because of the small-number statistics: ~ 1,100 are the GRBs detected so far, ~ 280 those with measured redshift, and ~ 70 the hosts studied in detail. These are typically low-redshift (z < 1.5), low luminosity, metal poor, and star-forming galaxes. On the other hand, at 1.5< z <4, massive, metal rich and dusty, interacting galaxies are not uncommon. The most distant population (z > 4) is poorly explored, but the deep limits reached point towards very small and star-forming objects, similar to the low-z population. This `back to the future' behavior is a natural consequence of the connection of long GRBs to star formation in young regions of the universe.
description: Invited talk at the Fall 2012 Gamma-Ray Burst Symposium (Marbella, Oct 2012), revised version after referee's report, to appear in the European Astronomical Society Publications Series
Chancen und Kriterien eines allgemeinen Nachhaltigkeitssiegels. TAB-Fokus
Creators: name: Revermann, Christoph
name: Petermann, T.
name: Poetzsch, M.
Publisher: name: Büro für Technikfolgen-Abschätzung beim Deutschen Bundestag (TAB)
Year: 2015

description: In Deutschland gibt es eine verwirrende Vielfalt von über 1.000 Produktkennzeichnungen, die auf Gesundheit, Nachhaltigkeit, Regionalität, Umweltschutz, fairen Handel o. Ä. verweisen. Die Orientierung des Konsumenten an Nachhaltigkeitskriterien bedeutet in der täglichen Praxis einen enormen Informationsaufwand. Ein allgemeines Nachhaltigkeitssiegel soll Verbrauchern am Verkaufsort eine zuverlässige Entscheidungshilfe bei der Wahl nachhaltiger Produkte (und Dienstleistungen) geben, indem es deren Nachhaltigkeitseigenschaften glaubwürdig, schnell und verständlich kommuniziert. Ein solches Siegel könnte sowohl den Verbraucherschutz stärken als auch die Nachhaltigkeit von Konsum und Produktion befördern. Ob ein Nachhaltigkeitssiegel diese intendierten Wirkungen zeigen kann, hängt von allen beteiligten Marktakteuren ab. Die Akzeptanz durch Produzenten und das Vertrauen der Verbraucher ist eine unabdingbare Voraussetzung. Allerdings ist es eine besondere inhaltliche, methodische und institutionelle Herausforderung, das komplexe Nachhaltigkeitskonzept in einen validen und transparenten Prozess der Nachhaltigkeitsbewertung zu überführen sowie ein tragfähiges Organisationsmodell für ein allgemeines Nachhaltigkeitssiegel umzusetzen.
NP-Hardness of Speed Scaling with a Sleep State
Creators: name: Kumar, Gunjan
name: Shannigrahi, Saswata
Publisher: name: arXiv
Year: 2013
Subjects: subject: Data Structures and Algorithms (cs.DS)
subject: FOS: Computer and information sciences

description: A modern processor can dynamically set it's speed while it's active, and can make a transition to sleep state when required. When the processor is operating at a speed $s$, the energy consumed per unit time is given by a convex power function $P(s)$ having the property that $P(0) > 0$ and $P"(s) > 0$ for all values of $s$. Moreover, $C > 0$ units of energy is required to make a transition from the sleep state to the active state. The jobs are specified by their arrival time, deadline and the processing volume. We consider a scheduling problem, called speed scaling with sleep state, where each job has to be scheduled within their arrival time and deadline, and the goal is to minimize the total energy consumption required to process these jobs. Albers et. al. proved the NP-hardness of this problem by reducing an instance of an NP-hard partition problem to an instance of this scheduling problem. The instance of this scheduling problem consists of the arrival time, the deadline and the processing volume for each of the jobs, in addition to $P$ and $C$. Since $P$ and $C$ depend on the instance of the partition problem, this proof of the NP-hardness of the speed scaling with sleep state problem doesn't remain valid when $P$ and $C$ are fixed. In this paper, we prove that the speed scaling with sleep state problem remains NP-hard for any fixed positive number $C$ and convex $P$ satisfying $P(0) > 0$ and $P"(s) > 0$ for all values of $s$.
description: 12 pages, 5 figures
title: Das Optimierungspotential eines bereits geplanten Bürogebäudes im Hinblick auf die Gebäudezertifizierung
Creators: name: Rühmann, M. Sc. Kay
Publisher: name: TU Wien
Year: 2022
Subjects: subject: DGNB
subject: Optimierung
subject: Optimierungspotential
subject: Neubau
subject: Bürogebäude
subject: Zertifizierung

description: Arbeit an der Bibliothek noch nicht eingelangt - Daten nicht geprueft - gesperrte Arbeit (bis 2024-12-05+01:00)
description: Abweichender Titel nach Übersetzung der Verfasserin/des Verfassers
Valorization of Biodiversity. TAB-Fokus
Creators: name: Kehl, Christoph
Publisher: name: Büro für Technikfolgen-Abschätzung beim Deutschen Bundestag (TAB)
Year: 2015

description: Biological diversity has been continuously threatened by anthropogenic influences and is considered to be one of the most important subjects of protection. Despite long-standing political efforts, it has not yet been possible to stop the loss of biodiversity. Therefore, in addition to traditional conservation measures, politics has begun to increasingly focus on innovative economic approaches (valuation and capturing). Due to the complexity of biodiversity, its economic valuation faces considerable uncertainties. There still is a substantial need for further interdisciplinary research on the matter. In view of various undesired side effects, economic instruments require a strong regulatory framework as well as a careful balance of interests, particularly in developing countries characterized by legal uncertainties.
NGC 7419 as a template for red supergiant clusters
Creators: name: Marco, Amparo
name: Negueruela, Ignacio
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The open cluster NGC 7419 is known to contain five red supergiants and a very high number of Be stars. However, there are conflicting reports about its age and distance that prevent a useful comparison with other clusters. We intend to obtain more accurate parameters for NGC 7419, using techniques different from those of previous authors, so that it may be used as a calibrator for more obscured clusters. We obtained Strömgren photometry of the open cluster NGC 7419, as well as classification spectroscopy of ~20 stars in the area. We then applied standard analysis and classification techniques. We find a distance of 4+-0.4 kpc and an age of 14+-2 Myr for NGC 7419. The main-sequence turn-off is found at spectral type B1, in excellent agreement. We identify 179 B-type members, implying that there are more than 1200 $M_{\sun}$ in B stars at present. Extrapolating this to lower masses indicates an initial cluster mass of between 7000 and 10000 Msolar, depending on the shape of the Initial Mass Function. We find a very high fraction (~40%) of Be stars around the turn-off, but very few Be stars at lower masses. We also report for the first time a strong variability in the emission characteristics of Be stars. We verified that the parameters of the red supergiant members can be used to obtain accurate cluster parameters. NGC 7419 is sufficiently massive to serve as a testbed for theoretical predictions and as a template to compare more obscured clusters. The distribution of stars above the main-sequence turn-off is difficult to accommodate with current evolutionary tracks. Though the presence of five red supergiants is marginally consistent with theoretical expectations, the high number of Be stars and very low number of luminous evolved B stars hint at some unknown physical factor that is not considered in current synthesis models.
description: Tables 3,4 and 7 will be published electronically Accepted for publication in Astronomy and Astrophysics
title: Mental ill-health and experiences of work in a ‘working community’ in Scotland
Creators: name: Martin, Eleanor Nichola
Publisher: name: University of Glasgow
Year: 2021

description: Within capitalist societies, active participation in paid employment is often considered an indicator of good mental health and wellbeing. Many support services for individuals with diagnoses of severe and enduring mental health conditions are focused around assisting these individuals to attain and retain paid employment. Despite this, in 2019 only 28.5% of individuals categorised as having a diagnosis of a ‘mental illness or other nervous disorder’ were in paid employment in the UK. This thesis explores the experiences of work and employment for individuals who have a diagnosis of a mental health condition and attended a ‘working community’ service in Scotland. This working community encourages its service users to participate in ‘meaningful work’ and prepare for entering paid employment in order for these individuals to achieve ‘mental health recovery’. I explore the space of the working community as an alternative to other welfare-to-work and supported employment approaches. Enlisting an emancipatory epistemology that aims to privilege the voices of individuals with diagnoses of mental health conditions, in this thesis I present a detailed account of the space of the working community and the experiences of those working within it. Utilising a qualitative multi-method research approach, I collected data through a year-long, in-depth ethnography as an observant participant in conjunction with semi-structured interviews and documentary analysis. I engage with literature from the geographies of mental health and beyond to conceptualise ‘community’ and ‘care’ and am informed by mad studies and critical disability studies to challenge exclusionary narratives of ‘mental health recovery’ which infer that obtaining paid employment inevitably improves mental wellbeing. This thesis offers a careful consideration of both the positive and negative aspects of work and employment for individuals with diagnoses of mental health conditions and examines the issues faced by these individuals in finding and keeping paid employment within a neoliberal society in which their potential productive capacity is undervalued. Through this, I contribute empirically to the geographies of mental health by adding a detailed ethnographic account of a space of work for individuals diagnosed with mental health conditions, and conceptually through providing a critical consideration of the term ‘recovery’.
X-ray Eclipse Diagnosis of the Evolving Mass Loss in the Recurrent Nova U Scorpii 2010
Creators: name: Takei, D.
name: Drake, J. J.
name: Tsujimoto, M.
name: Ness, J. -U.
name: Osborne, J. P.
name: Starrfield, S.
name: Kitamoto, S.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We report the Suzaku detection of the earliest X-ray eclipse seen in the recurrent nova U Scorpii 2010. A target-of-opportunity observation 15 days after the outburst found a 27+/-5% dimming in the 0.2-1.0 keV energy band at the predicted center of an eclipse. In comparison with the X-ray eclipse depths seen at two later epochs by XMM-Newton, the source region shrank by about 10-20% between days 15 and 35 after the outburst. The X-ray eclipses appear to be deeper than or similar to contemporaneous optical eclipses, suggesting the X-ray and optical source region extents are comparable on day 15. We raise the possibility of the energy dependency in the photon escape regions, and that this would be a result of the supersoft X-ray opacity being higher than the Thomson scattering optical opacity at the photosphere due to bound-free transitions in abundant metals that are not fully ionized. Assuming a spherically symmetric explosion model, we constrain the mass-loss rate as a function of time. For a ratio of actual to Thomson opacity of 10-100 in supersoft X-rays, we find a total ejecta mass of about 10^{-7}-10^{-6} M_{\odot}.
description: To appear in the Astrophysical Journal Letters; 5 pages, 3 figures
A simple and effective Verlet-type algorithm for simulating Langevin dynamics
Creators: name: Grønbech-Jensen, Niels
name: Farago, Oded
Publisher: name: arXiv
Year: 2012
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: We present a revision to the well known Stormer-Verlet algorithm for simulating second order differential equations. The revision addresses the inclusion of linear friction with associated stochastic noise, and we analytically demonstrate that the new algorithm correctly reproduces diffusive behavior of a particle in a flat potential. For a harmonic oscillator, our algorithm provides the exact Boltzmann distribution for any value of damping, frequency, and time step for both underdamped and over damped behavior within the usual the stability limit of the Verlet algorithm. Given the structure and simplicity of the method we conclude this approach can trivially be adapted for contemporary applications, including molecular dynamics with extensions such as molecular constraints.
description: 10 pages, one figure. Minor typographical errors fixed; clarification on applicability included
Inwertsetzung von Biodiversität. TAB-Fokus
Creators: name: Kehl, Christoph
Publisher: name: Büro für Technikfolgen-Abschätzung beim Deutschen Bundestag (TAB)
Year: 2015

description: Die biologische Vielfalt gilt als eines der wichtigsten natürlichen Schutzgüter, das von anthropogenen Einflüssen anhaltend bedroht ist. Trotz langjähriger Schutzbemühungen ist es bislang nicht gelungen, den Biodiversitätsverlust zu stoppen. Zunehmend setzt die Politik deshalb neben den klassischen Schutzbemühungen auf innovative ökonomische Lösungsansätze (Inwertsetzung). Durch die Komplexität des Schutzgutes ist die ökonomische Bewertung von Biodiversität mit großen Unsicherheiten konfrontiert. Es besteht noch großer Forschungsbedarf, vor allem im Bereich der ökologischen Grundlagen. Angesichts diverser sozialökologischer Nebeneffekte bedürfen ökonomische Instrumente eines starken Ordnungsrahmens und eines gesellschaftlichen Interessenausgleichs, besonders in den von Rechtsunsicherheiten geprägten Entwicklungsländern.
Electronic supplementary material from Direct and inverse scattering problems of the modified Sawada–Kotera equation: Riemann–Hilbert approach
Creators: name: Wang, Deng-Shan
name: Zhu, Xiaodong
Publisher: name: The Royal Society
Year: 2022
Subjects: subject: 10599 Mathematical Physics not elsewhere classified
subject: FOS: Mathematics

description: It is known that both the Sawada–Kotera equation and the Kaup–Kupershmidt equation are related with the same modified equation by different Miura transformations. There is singularity at the origin in the spectral problems of the Sawada–Kotera equation and the Kaup–Kupershmidt equation. Instead, this work investigates the forward and inverse scattering problems of the modified Sawada–Kotera equation by Riemann–Hilbert approach to avoid the singularity at the origin. The Riemann–Hilbert problem along with the reconstructing formula of the modified Sawada–Kotera equation are proposed. Moreover, the properties of the reflection coefficients are analysed rigorously. The results in this paper make an important step toward the long-time asymptotics of the modified Sawada–Kotera equation.
Constraining sub-Parsec Binary Supermassive Black Holes in Quasars with Multi-Epoch Spectroscopy. I. The General Quasar Population
Creators: name: Shen, Yue
name: Liu, Xin
name: Loeb, Abraham
name: Tremaine, Scott
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We perform a systematic search for sub-parsec binary supermassive black holes (BHs) in normal broad line quasars at z<0.8, using multi-epoch SDSS spectroscopy of the broad Hbeta line. Our working model is that: only one of the two BHs in the binary is active, and dynamically dominates its own broad line region (BLR); the inactive companion BH is orbiting at a distance of a few R_BLR, where R_BLR~0.01-0.1 pc is the BLR size. We search for the expected line-of-sight acceleration of the broad line velocity from binary orbital motion by cross-correlating SDSS spectra from two epochs separated by up to several years in the quasar restframe. Out of ~700 pairs of spectra for which we have good measurements of the velocity shift between two epochs (1-sigma error~40 km/s), we detect 28 systems with significant velocity shifts in broad Hbeta, among which seven are the best candidates for the hypothesized binaries. We use the distribution of the observed accelerations (mostly non-detections) to place constraints on the abundance of such binary systems among the general quasar population. Excess variance in the velocity shift is inferred for observations separated by longer than 0.4 yr (quasar restframe). Attributing all the excess to binary motion would imply that most of the quasars in this sample must be in binaries; that the inactive BH must be on average more massive than the active one; and that the binary separation is at most a few times the size of the BLR. However, if this excess variance is partly or largely due to long-term broad line variability, the requirement of a large population of close binaries is much weakened or even disfavored for massive companions. [Abridged]
description: replaced with accepted version; ApJ, in press
About Landau-Hopf scenario in a system of coupled self-oscillators
Creators: name: Kuznetsov, Alexander P.
name: Kuznetsov, Sergey P.
name: Sataev, Igor R.
name: Turukina, Ludmila L.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences
subject: 34D06, 34D08, 70K43, 34C15

description: The conditions are discussed for which an ensemble of interacting oscillators may demonstrate the Landau-Hopf scenario of successive birth of multi-frequency quasi-periodic motions. A model is proposed that is a network of five globally coupled oscillators characterized by controlled degree of activation of individual oscillators. Illustrations are given for successive birth of tori of increasing dimension via quasi-periodic Hopf bifurcations.
On a Boltzmann type price formation model
Creators: name: Burger, Martin
name: Caffarelli, Luis
name: Markowich, Peter
name: Wolfram, Marie-Therese
Publisher: name: arXiv
Year: 2013
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: In this paper we present a Boltzmann type price formation model, which is motivated by a parabolic free boundary model for the evolution of the prize presented by Lasry and Lions in 2007. We discuss the mathematical analysis of the Boltzmann type model and show that its solutions converge to solutions of the model by Lasry and Lions as the transaction rate tends to infinity. Furthermore we analyse the behaviour of the initial layer on the fast time scale and illustrate the price dynamics with various numerical experiments.
Josephson Current through Semiconductor Nanowire with Spin-Orbit Interaction in Magnetic Field
Creators: name: Yokoyama, Tomohiro
name: Eto, Mikio
name: Nazarov, Yuli V.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We theoretically study the DC Josephson effect of a semiconductor nanowire (NW) with strong spin-orbit interaction when a magnetic field is applied parallel to the NW. We adopt a model of single scatterer in a quasi-one-dimensional system for the case of short junctions where the size of normal region is much smaller than the coherent length. In the case of single conduction channel in the model, we obtain analytical expressions for the energy levels of Andreev bound states, $E_n$, and supercurrent $I$, as a function of phase difference $φ$ between two superconductors. We show the 0-$π$ transition by tuning the magnetic field. In the case of more than one conduction channel, we find that $E_n (-φ) \ne E_n (φ)$ by the interplay between the spin-orbit interaction and Zeeman effect, which results in finite supercurrent at $φ=0$ (anomalous Josephson current) and direction-dependent critical current.
description: Submitted to J. Phys. Soc. Jpn
D-loops
Creators: name: Deriyenko, Ivan I.
name: Dudek, Wieslaw A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 20N05

description: $D$-loops are loops with the antiautomorphic inverse property. The class of such loops is larger than the class of IP-loops. The smallest $D$-loops which is not an IP-loop has six elements. We prove several basic properties of such loops and present methods of constructions of $D$-loops from IP-loops. Unfortunately, a loop isotopic to a $D$-loop may not be a $D$-loop.