cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Gravitational- and Self- Coupling of Partially Massless Spin 2
Creators: name: Deser, S.
name: Joung, E.
name: Waldron, A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We show that higher spin systems specific to cosmological spaces are subject to the same problems as models with Poincar'e limits. In particular, we analyse partially massless (PM) spin 2 and find that both its gravitational coupling and nonlinear extensions suffer from the usual [background- and self-coupling] difficulties: Consistent free field propagation does not extend beyond background Einstein geometries. Then, using conformal Weyl gravity (CG), which consists of relative ghost PM and graviton excitations, we find that avoiding graviton-ghosts restricts CG-generated PM self-couplings to the usual, safe, Noether current cubic ones.
description: 10 pages, LaTeX. Announcement version of 1208.1307 emphasizing physical over mathematical details.
Elementspeziesanalyse des Antimons mittels Ionenchromatographie und Kapillarelektrophorese : Grundlagen und Anwendung am Beispiel der Leishmaniose
Creators: name: Costa Casado, Roció
Publisher: name: Hannover : Universität
Year: 2005
Subjects: subject: Antimony speciation
subject: ion chromatography
subject: electrophoresis
subject: Leishmaniasis
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie
subject: Dewey Decimal Classification::600 | Technik::610 | Medizin, Gesundheit

description: [no abstract]
Quantum electrodynamics of two-body systems with arbitrary masses
Creators: name: Zatorski, Jacek
name: Patkóš, Vojtěch
name: Pachucki, Krzysztof
Publisher: name: arXiv
Year: 2022
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We perform a calculation of quantum electrodynamics effects in excited states with $l>1$ of arbitrary two-body systems up to $α^6\,μ$ order. The obtained results are valid for hadronic atoms, as long as the strong interaction effects are negligible. We demonstrate that for circular states with $l\sim n$, the effective expansion parameter is $Z\,α/n$, which extends the applicability of the derived formulas to heavy ions. Moreover, inclusion of higher-order terms is feasible, which indicates that accurate measurements of excited states of, for example, muonic or antiprotonic hydrogenic ions can be used to determine the fundamental constants and to search for the existence of yet unknown long-range interactions.
Gauge-spin-space rotation invariant vortices in spin-orbit coupled Bose-Einstein condensates
Creators: name: Xu, Zhi-Fang
name: Kobayashi, Shingo
name: Ueda, Masahito
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We revisit ground states of spinor Bose-Einstein condensates with a Rashba spin-orbit coupling, and find that votices show up as a direct consequence of spontaneous symmetry breaking into a combined gauge, spin, and space rotation symmetry, which determines the vortex-core spin state at the rotating center. For the continuous combined symmetry, the total spin rotation about the rotating axis is restricted to $2π$, whereas for the discrete combined symmetry, we further need 2F quantum numbers to characterize the total spin rotation for the spin-$F$ system. For lattice phases we find that in the ground state the topological charge for each unit cell vanishes. However, we find two types of highly symmetric lattices with a nontrivial topological charge in the spin-$\frac{1}{2}$ system based on the symmetry classification, and show that they are skyrmion crystals.
description: 10+ pages, 5 figures
Positivity bounds on effective field theories with spontaneously broken Lorentz invariance
Creators: name: Creminelli, Paolo
name: Janssen, Oliver
name: Senatore, Leonardo
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We derive positivity bounds on EFT coefficients in theories where boosts are spontaneously broken. We employ the analytic properties of the retarded Green's function of conserved currents (or of the stress-energy tensor) and assume the theory becomes conformal in the UV. The method is general and applicable to both cosmology and condensed matter systems. As a concrete example, we look at the EFT of conformal superfluids which describes the universal low-energy dynamics of CFT's at large chemical potential and we derive inequalities on the coefficients of the operators, in three dimensions, at NLO and NNLO.
description: 31+14 pages
The sedimentation of flexible filaments
Creators: name: Li, Lei
name: Manikantan, Harishankar
name: Saintillan, David
name: Spagnolie, Saverio E.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: The dynamics of a flexible filament sedimenting in a viscous fluid are explored analytically and numerically. Compared to the well-studied case of sedimenting rigid rods, the introduction of filament compliance is shown to cause a significant alteration in the long-time sedimentation orientation and filament geometry. A model is developed by balancing viscous, elastic, and gravitational forces in a slender-body theory for zero-Reynolds-number flows, and the filament dynamics are characterized by a dimensionless elasto-gravitation number. Filaments of both non-uniform and uniform cross-sectional thickness are considered. In the weakly flexible regime, a multiple-scale asymptotic expansion is used to obtain expressions for filament translations, rotations, and shapes. These are shown to match excellently with full numerical simulations. Furthermore, we show that trajectories of sedimenting flexible filaments, unlike their rigid counterparts, are restricted to a cloud whose envelope is determined by the elasto-gravitation number. In the highly flexible regime we show that a filament sedimenting along its long axis is susceptible to a buckling instability. A linear stability analysis provides a dispersion relation, illustrating clearly the competing effects of the compressive stress and the restoring elastic force in the buckling process. The instability travels as a wave along the filament opposite the direction of gravity as it grows and the predicted growth rates are shown to compare favorably with numerical simulations. The linear eigenmodes of the governing equation are also studied, which agree well with the finite-amplitude buckled shapes arising in simulations.
Funktionelle Untersuchungen an den MCH-Rezeptor 1 interagierenden Proteinen MIZIP und Neurochondrin
Creators: name: Francke, Felix
Publisher: name: Hannover : Universität
Year: 2005
Subjects: subject: Melanin-concentrating hormon
subject: MIZIP
subject: neurochondrin
subject: Dewey Decimal Classification::500 | Naturwissenschaften::570 | Biowissenschaften, Biologie

description: [no abstract]
Do high-spin high-mass X-ray binaries contribute to the population of merging binary black holes?
Creators: name: Gallegos-Garcia, Monica
name: Fishbach, Maya
name: Kalogera, Vicky
name: Berry, Christopher P L
name: Doctor, Zoheyr
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Gravitational-wave observations of binary black hole (BBH) systems point to black hole spin magnitudes being relatively low. These measurements appear in tension with high spin measurements for high-mass X-ray binaries (HMXBs). We use grids of MESA simulations combined with the rapid population-synthesis code COSMIC to examine the origin of these two binary populations. It has been suggested that Case-A mass transfer while both stars are on the main sequence can form high-spin BHs in HMXBs. Assuming this formation channel, we show that depending on critical mass ratios for the stability of mass transfer, 48-100% of these Case-A HMXBs merge during the common-envelope phase and up to 42% result in binaries too wide to merge within a Hubble time. Both MESA and COSMIC show that high-spin HMXBs formed through Case-A mass transfer can only form merging BBHs within a small parameter space where mass transfer can lead to enough orbital shrinkage to merge within a Hubble time. We find that only up to 11% of these Case-A HMXBs result in BBH mergers, and at most 20% of BBH mergers came from Case-A HMXBs. Therefore, it is not surprising that these two spin distributions are observed to be different.
description: 11 pages, 4 figures, 2 tables; published ApJL
Essays on corporate finance: the impacts of labor protection on corporate policies
Creators: name: Rongbing Xiao
Publisher: name: Loughborough University
Year: 2020
Subjects: subject: 150399 Business and Management not elsewhere classified
subject: FOS: Economics and business

description: This thesis consists of three essays about the role of labor protection in corporate finance. The first empirical work studies labor protection and the leverage-employee pay relation. The literature documents a relation between financial leverage and employee pay, in which employees demand a high wage to compensate for the high unemployment risk caused by firms’ high leverage. This paper investigates how an exogenous labor protection law affects the above relation. I show that the adoption of the law alleviates firms’ pressure from raising wages, given the improvement of job security brought by the law; and financially constrained or distressed firms particularly benefited from the law. My results suggest that all else equal, labor protection law helps firms control their leverage related labor costs via improving the job security of employees. [Continues.]
Current noise and higher order fluctuations in semiconducting bilayer systems
Creators: name: Soller, H.
name: Komnik, A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We analyze the transport properties of a semiconductor based bilayer system under non-equilibrium conditions with special emphasis on the charge transfer statistics in the regime dominated by the exciton transport. We consider two different models. In one of them the transport occurs incoherently and is dominated by incoherent tunneling processes of individual excitons, while in the other system no disorder is present and transport processes are fully coherent. We find that the strength of cross correlations of currents in different layers is only insignificantly affected by the disorder and shows up similar behaviour in both systems. We discuss possible experimental realizations and make predictions for measurable quantities.
description: 7 pages, 4 figures, accepted by Fluctuations and Noise Letters
Crystal structure of catena-octachlorotrisiloxane,Si3O2Cl8
Creators: name: Binnewies, Michael
name: Borrmann, H.
Publisher: name: München : Oldenbourg
Year: 2002
Subjects: subject: mineralogy
subject: crystallography
subject: Mineralogie
subject: Kristallographie
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie

description: CI8O2Si3, orthorhombic, Pnma (No. 62), a = 10.669(1) Å, b = 20.317(3) Å, c = 6.183(1) Å, V= 1340.4 Å3, Z = 4, Rgt(F) = 0.023, wRobsf(F2) = 0.055, T= 90 K.
Multi-resonance orbital model of high-frequency quasi-periodic oscillations: possible high-precision determination of black hole and neutron star spin
Creators: name: Stuchlik, Zdenek
name: Kotrlova, Andrea
name: Torok, Gabriel
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Using known frequencies of the twin-peak high-frequency quasiperiodic oscillations (HF QPOs) and known mass of the central black hole, the black-hole dimensionless spin can be determined by assuming a concrete version of the resonance model. However, a wide range of observationally limited values of the black hole mass implies low precision of the spin estimates. We discuss the possibility of higher precision of the black hole spin measurements in the framework of a multi-resonance model inspired by observations of more than two HF QPOs in the black hole systems, which are expected to occur at two (or more) different radii of the accretion disc. For the black hole systems we focus on the special case of duplex frequencies, when the top, bottom, or mixed frequency is common at two different radii where the resonances occur giving triple frequency sets. The sets of triple frequency ratios and the related spin are given. The strong resonance model for "magic" values of the black hole spin means that two (or more) versions of resonance could occur at the same radius, allowing cooperative effects between the resonances. For neutron star systems we introduce a resonant switch model that assumes switching of oscillatory modes at resonant points. In the case of doubled twin-peak HF QPOs excited at two different radii with common top, bottom, or mixed frequency, the black hole spin is given by the triple frequency ratio set. The spin is determined precisely, but not uniquely, because the same frequency set could correspond to more than one concrete spin. The black hole mass is given by the magnitude of the observed frequencies. The resonant switch model puts relevant limits on the mass and spin of neutron stars, and we expect a strong increase in the fitting procedure precision when different twin oscillatory modes are applied to data in the vicinity of different resonant points.
description: 43 pages, 10 figures
title: Teacher as facilitator: a case study of enhanced student agency
Creators: name: Corey, Alexander
Publisher: name: Memorial University of Newfoundland
Year: 2019

description: This research investigates an enhanced agency classroom. A small class of 12 grade-six students undertook a two-week unit in which they could exercise their agency by choosing what they wanted to learn, how they wanted to learn it and how they wanted to be assessed. Qualitative data was collected in the form of a journal, written by the teacher-researcher who made detailed observations of his role, the role of the students, and the overall effects of providing such a classroom. Ultimately, the enhanced agency unit acted as a polarizing tool where some students were able to embrace their agency and increase their sense of engagement, motivation and academic outcomes, while others found the lack of structure and routine difficult to cope with. Recommendations for further research and how to more effectively enhance student agency are also made.
Accelerating Multi-Model Bayesian Inference, Model Selection and Systematic Studies for Gravitational Wave Astronomy
Creators: name: Hoy, Charlie
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Gravitational wave models are used to infer the properties of black holes in merging binaries from the observed gravitational wave signals through Bayesian inference. Although we have access to a large collection of signal models that are sufficiently accurate to infer the properties of black holes, for some signals, small discrepancies in the models lead to systematic differences in the inferred properties. In order to provide a single estimate for the properties of the black holes, it is preferable to marginalize over the model uncertainty. Bayesian model averaging is a commonly used technique to marginalize over multiple models, however, it is computationally expensive. An elegant solution is to simultaneously infer the model and model properties in a joint Bayesian analysis. In this work we demonstrate that a joint Bayesian analysis can not only accelerate but also account for model-dependent systematic differences in the inferred black hole properties. We verify this technique by analysing 100 randomly chosen simulated signals and also the real gravitational wave signal GW200129_065458. We find that not only do we infer statistically identical properties as those obtained using Bayesian model averaging, but we can sample over a set of three models on average $2.5\times$ faster. In other words, a joint Bayesian analysis that marginalizes over three models takes on average only $20\%$ more time than a single model analysis. We then demonstrate that this technique can be used to accurately and efficiently quantify the support for one model over another, thereby assisting in Bayesian model selection.
description: 14 pages, 5 figures
Studien zur chemoenzymatischen Synthese von Maytansinoid-Analoga : Synthese von seco-Proansamitocin
Creators: name: Frenzel, Thomas
Publisher: name: Hannover : Universität
Year: 2005
Subjects: subject: Maytansinoide
subject: Polyketide
subject: Naturstoffsynthese
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie

description: [no abstract]
Sparse Coding and Dictionary Learning for Symmetric Positive Definite Matrices: A Kernel Approach
Creators: name: Harandi, Mehrtash T.
name: Sanderson, Conrad
name: Hartley, Richard
name: Lovell, Brian C.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Machine Learning (cs.LG)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences
subject: I.2.6; I.5.1; I.5.4; I.2.10

description: Recent advances suggest that a wide range of computer vision problems can be addressed more appropriately by considering non-Euclidean geometry. This paper tackles the problem of sparse coding and dictionary learning in the space of symmetric positive definite matrices, which form a Riemannian manifold. With the aid of the recently introduced Stein kernel (related to a symmetric version of Bregman matrix divergence), we propose to perform sparse coding by embedding Riemannian manifolds into reproducing kernel Hilbert spaces. This leads to a convex and kernel version of the Lasso problem, which can be solved efficiently. We furthermore propose an algorithm for learning a Riemannian dictionary (used for sparse coding), closely tied to the Stein kernel. Experiments on several classification tasks (face recognition, texture classification, person re-identification) show that the proposed sparse coding approach achieves notable improvements in discrimination accuracy, in comparison to state-of-the-art methods such as tensor sparse coding, Riemannian locality preserving projection, and symmetry-driven accumulation of local features.
title: Coupled thermo-electro-mechanical modeling of thermal fatigue of single-crystal corset samples
Creators: name: Savikovskii, A.V.
name: Semenov,  A.S.
name: Getsov, L.B.
Publisher: name: Peter the Great St. Petersburg Polytechnic University
Year: 2019

description: The possibilities of predicting thermal fatigue durability for single crystal on the base of coupled thermo-electro-mechanical finite-element modeling with using of deformational criterion and microstructural models of inelastic deformation are investigated. Results of thermal and stress-strain state simulations of single-crystal corset specimens under cyclic electric heating and cooling are presented and discussed. Comparison of computational results with experimental data for various single-crystal nickel-based superalloys demonstrates a good accuracy in the prediction of the number of cycles for the macrocrack initiation. The influence of maximum / minimum values of temperature in cycle and delay duration on the number of cycles for the macrocrack initiation are analyzed. The simplified analytic approximation for thermal fatigue durability curves is proposed.
Herstellung und Analyse einer Maus mit gezielter Inaktivierung des TRH-DE Gens
Creators: name: Geffers, Lars
Publisher: name: Hannover : Universität
Year: 2005
Subjects: subject: TRH-DE knock-out
subject: TRH
subject: homeostasis
subject: central nervous system
subject: phototropism
subject: Dewey Decimal Classification::500 | Naturwissenschaften::570 | Biowissenschaften, Biologie

description: [no abstract]
Thalictrum saxatile All.
Creators: name: Becherer
Publisher: name: Zenodo
Year: 1956
Subjects: Biodiversity
Taxonomy

description: T. saxatile All. (T. thymiflorum Vill.) Cat. 68 und 423. Auf trockenem Geröll und Grus; nach GAMS hinsichtlich der Bodenunterlage ziemlich indifferent. Obere Höhengrenze festzustellen. Die Zahl «3100 m» im Cat. ist von JACCARD, offenbar in bezug auf den Fundort Gornergrat, willkürlich gesetzt worden; HEER, der die Art in der Gornergrat-Liste aufführt,gibt keine genaue Höhenzahl. Die Angabe im Cat.: «Menouve et pied du Velan (Tissière)» ist zu streichen. Es handelt sich hier nicht um zwei, sondern um einen einzigenund nicht in der Schweiz,sondern auf der Südseiteder Penninen (Aostatal) liegenden Fundort (Menouve; vgl. Tissière, Guide Bot. Gr. St-Bernard, S. 35 [1868]). Die Angabe aus dem Valsorey ist sehr bestätigungsbedürftig, da sie auf einen nicht immer zuverlässigen Gewährsmann (CORREVON) zurückgeht. Es verbleibt somit für die Drancetäler als glaubwürdige Angabe bloss: Chanrion im Val de Bagnes (R. Chodat). Mehrfach in den Vispertälern (Mattertal und Saastal; Distr. 3) und auf der Simplonsüdseite (Distr. 3a) und hier auch in neuerer Zeit von vielen Beobachtern festgestellt; im Mattertal sehr verbreitet um Randa (Wilczek,Huber, A. Anthamatten); im Saastalvon JACCARD einmal herabgeschwemmt bei Balen gefunden.
description: Published as part of Becherer, 1956, Florae Vallesiacae Supplementum, pp. 1-556 in Denkschriften der Schweizerischen Naturforschenden Gesellschaft 71 on pages 1-556
Multiwavelength observations of Swift J0243.6+6124 from 2017 to 2022
Creators: name: Liu, Wei
name: Yan, Jingzhi
name: Reig, Pablo
name: Wang, Xiaofeng
name: Xiao, Guangcheng
name: Lin, Han
name: Zhang, Xinhan
name: Sai, Hanna
name: Chen, Zhihao
name: Yan, Shengyu
name: Liu, Qingzhong
Publisher: name: arXiv
Year: 2022
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We have obtained optical spectroscopy and photometry data during four years after the event. The long-term photometric light-curve and the equivalent widths of the Halpha and He I 6678 lines were used to monitor the state of the Be star disk. The Halpha line profiles show evidence for V/R variability that was accounted for by fitting the Halpha spectral line profile with two Gaussian functions. We divided our data into three phases according to the intensity of the X-ray, optical, and infrared emission. Phase I covers the rise and decay of the giant X-ray outburst that took place in October to November 2017. We interpret phase II as the dissipation of the Be star equatorial disk and phase III as its recovery. The timescale of a complete formation and dissipation process is about 1250 days. The epoch when the dissipation process stopped and the reformation period began is estimated to be around MJD 58530. We find a delay of about 100 to 200 days between the minimum of the optical or infrared intensity and the strength of the Halpha line after the X-ray outburst, which may indicate that the dissipation of the disk begins from the inner parts. The motion of the density perturbation inside the disk is prograde, with a V/R quasi-period of about four years. The source shows a positive correlation in the (B-V) color index versus V-band magnitude diagram, which implies that the system is seen at a small or moderate inclination angle.
description: 15 pages, 5 figures
easydb. Flexibles Framework zum Aufbau von Metadaten- und Medien-Repositorien. Anwendungsfall: Forschungsdaten.
Creators: name: Klarmann, Sebastian
Publisher: name: Zenodo
Year: 2020
Subjects: FDM
Forschungsdatenmanagement
RDM
Research Data Management
eScience
easydb
FAIR
NFDI
Erschließungssysteme
Präsentationsoberflächen

description: Dies sind die Präsentationsfolien von Sebastian Klarmann zur Veranstaltung zu easydb und Forschungsdatenmanagement, an der am 10.12.2020 über 90 interessierte Personen teilgenommen haben. Forschungsdatenverwaltung mit easydb, Donnerstag 10.12.2020 14:00 -15:30 Uhr https://www.programmfabrik.de/forschungsdatenverwaltung-mit-easydb-donnerstag-10-12-2020-1400-1530-uhr/ " Da in diesem Jahr viele Fachmessen und Tagungen weggefallen sind, haben Sie sicher wenig Möglichkeiten gehabt, aktuelle Markttrends zu verfolgen, obwohl Themen wie Forschungsdatenmanagement an Aktualität nicht eingebüßt haben. Um Ihnen trotzdem die Möglichkeit zu geben, sich über den Aufbau von komplexen Medien- und Metadaten-Repositorien zu informieren, bieten wir am Donnerstag, den 10.12.2020 von 14:00 – 15:30 Uhr eine Online-Veranstaltung mit drei Kurzvorträgen an. Die Veranstaltung wird mit dem Webkonferenzsystem auf Basis von BigBlueButton (BBB) bereitgestellt: https://app.bbbserver.de/de/join/5793572d-9af4-4bdd-a810-04cf9425826e Eine Anmeldung ist nicht erforderlich. Es sprechen folgende Referenten:
 – 14:00 – 14:15: Sebastian Klarmann, COO Programmfabrik GmbH, „easydb als Framework zum Aufbau komplexer Medien- und Metadatenrepositorien“
 – 14:30 – 14:45 Annette Strauch, M.A. Forschungsdatenmanagement, Stiftung Universität Hildesheim, „Darstellung von Forschungsdaten durch individuelle Präsentationsoberflächen mit easydb am Beispiel von HilData. Forschungsdatenmanagement der Stiftung Universität Hildesheim (UB Hildesheim).“
 – 15:00 – 15:15 Leonhard Maylein, Leiter der Abteilung EDV-Versorgung/Informationstechnologie, Fachreferent für Informatik, Universitätsbibliothek Heidelberg „Forschungsdatenmanagement an der Universitätsbibliothek Heidelberg mit easydb“ Zwischen den einzelnen Beiträgen sind jeweils 15 Minuten für kurze Rückfragen vorgesehen. Wir freuen uns auf zahlreiche Teilnehmer und eine anregende Veranstaltung."
An Alternative Approach to Extending pseudo-Anosovs Over Compression Bodies
Creators: name: Ackermann, Robert
Publisher: name: arXiv
Year: 2013
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics

description: A recent paper (\cite{BJM}) by Biringer, Johnson, and Minsky prove that any pseudo-Anosov whose stable lamination is the limit of disks in a compression body has a power which extends over some non-trivial minimal compression body. This paper presents an alternative proof of their theorem, using techniques of Long and Casson which first appeared in \cite{CL} and \cite{L}. The key ingredient is the existence of a certain collection of disks whose boundaries are formed from an arc of the stable lamination and an arc of the unstable lamination. Furthermore, the proof here shows that there are only finitely many minimal compression bodies over which a power of a pseudo-Anosov can extend.
description: 8 pages
Atomistic characterization of the SiO2 high-density liquid/low-density liquid interface
Creators: name: Zhang, Xin
name: Laird, Brian B.
name: Liang, Hongtao
name: Lu, Wenliang
name: Yu, Zhiyong
name: Ma, Xiangming
name: Cheng, Ya
name: Yang, Yang
Publisher: name: arXiv
Year: 2022
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The equilibrium silica liquid-liquid interface between the high-density liquid (HDL) phase and the low-density liquid (LDL) phase is examined using molecular-dynamics simulation. The structure, thermodynamics, and dynamics within the interfacial region are characterized in detail and compared with previous studies on the liquid-liquid phase transition (LLPT) in bulk silica, as well as traditional crystal-melt interfaces. We find that the silica HDL-LDL interface exhibits a spatial fragile-to-strong transition across the interface. Calculations of dynamics properties reveal three types of dynamical heterogeneity hybridizing within the silica HDL-LDL interface. We also observe that as the interface is traversed from HDL to LDL, the Si/O coordination number ratio jumps to an unexpectedly large value, defining a thin region of the interface where HDL and LDL exhibit significant mixing. In addition, the LLPT phase coexistence is interpreted in the framework of the traditional thermodynamics of alloys and phase equilibria.
description: 13 pages, 8 figures
Schmelzbaddynamik beim Laserstrahl-Wärmeleitungsschweißen von Eisenwerkstoffen
Creators: name: Czerner, Stefan
Publisher: name: Hannover : Universität
Year: 2005
Subjects: subject: Laser beam
subject: melt pool dynamics
subject: alloying elements influence
subject: Dewey Decimal Classification::600 | Technik::670 | Industrielle und handwerkliche Fertigung

description: [no abstract]
Experimentelle Bestimmung der Wärmekapazität teilkristalliner Polymere und ihre Modellierung
Creators: name: Dobreva, Petia
Publisher: name: Hannover : Universität
Year: 2005
Subjects: subject: Teilkristalline Polymere
subject: Wärmekapazität
subject: dynamische Differenzkalorimetrie
subject: thermische Vorgeschichte
subject: Dewey Decimal Classification::600 | Technik::660 | Technische Chemie

description: [no abstract]
Electron beam polarimeter and energy spectrometer
Creators: name: Muchnoi, N. Yu.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Accelerator Physics (physics.acc-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The backscattering of laser radiation by a relativistic electron beam is a widely used method for measuring the spin polarization of electrons. We consider again the properties of the scattering process paying special attention to recoil electrons. Based on this consideration we propose the concept of the Compton polarimeter in which, in addition to all the polarization components, it becomes possible to accurately measure the energy and other parameters of the electron beam. To demonstrate the capabilities of the method we conduct a Monte Carlo simulations of the polarimeter developed for the FCC-ee project.
description: 18 pages, 7 tables, 5 figures
title: Numerical method of single-crystal turbine blade static strength estimation taking into account plasticity and creep effects
Creators: name: Vasilyev, Boris
name: Selivanov, Alexander
Publisher: name: Peter the Great St. Petersburg Polytechnic University
Year: 2019

description: To increase the reliability of single-crystal blade durability estimations a
phenomenological model of single crystal superalloy plasticity based on the use of an
“equivalent” direction and its software implementation has been developed. The relative
orientation between principal stresses and single-crystal (SX) axes is considered by this
direction. In order to study the effect of crystallographic orientation (CO) on the
characteristics of a single-crystal material, a series of tests was carried out at various
temperatures under tension under conditions of short-term and long-term loading. The
possibility of using linear interpolation to determine the characteristics of plasticity and creep
for intermediate CO has been confirmed. An example is given of using the developed
calculation method in the Finite Element Analysis Software CalculiX using the model blade
as an example.
Tunneling resonances in quantum dots: Coulomb interaction modifies the width
Creators: name: Könemann, Jens
name: Kubala, Björn
name: König, Jürgen
name: Haug, Rolf J.
Publisher: name: College Park, MD : American Physical Society
Year: 2006
Subjects: subject: quantum dots
subject: Coulomb interaction
subject: single-electron tunneling
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: Single-electron tunneling through a zero-dimensional state in an asymmetric double-barrier resonant-tunneling structure is studied. The broadening of steps in the I-V characteristics is found to strongly depend on the polarity of the applied bias voltage. Based on a qualitative picture for the finite-lifetime broadening of the quantum dot states and a quantitative comparison of the experimental data with a nonequilibrium transport theory, we identify this polarity dependence as a clear signature of Coulomb interaction. © 2006 The American Physical Society.
Mollow "quintuplets" from coherently-excited quantum dots
Creators: name: Ge, Rong-Chun
name: Weiler, S.
name: Ulhaq, A.
name: Ulrich, S. M.
name: Jetter, M.
name: Michler, P.
name: Hughes, S.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Charge-neutral excitons in semiconductor quantum dots have a small finite energy separation caused by the anisotropic exchange splitting. Coherent excitation of neutral excitons will generally excite both exciton components, unless the excitation is parallel to one of the dipole axes. We present a polaron master equation model to describe two-exciton pumping using a coherent continuous wave pump field in the presence of a realistic anisotropic exchange splitting. We predict a five-peak incoherent spectrum, thus generalizing the Mollow triplet to become a Mollow quintuplet. We experimentally confirm such spectral quintuplets for In(Ga)As quantum dots and obtain very good agreement with theory.
Revealing impacts of stellar mass and environment on galaxy quenching
Creators: name: Mao, Zhiying
name: Kodama, Tadayuki
name: Pérez-Martínez, Jose Manuel
name: Suzuki, Tomoko L.
name: Yamamoto, Naoaki
name: Adachi, Kouta
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Galaxy quenching is a critical step in galaxy evolution. In this work, we present a statistical study of galaxy quenching in 17 cluster candidates at 0.5
description: 20 pages, 19 figures, accepted for publication in A&A
title: Identification of micro-mechanical characteristics of monoclinic tungsten trioxide microparticles by nanoindentation technique
Creators: name: Nandiyanto, A.B.D.
name: Triawan, F.
name: Firly, R.
name: Abdullah,  A.G.
name: Aono,  Y.
name: Inaba, K.
name: Kishimoto, K.
Publisher: name: Peter the Great St. Petersburg Polytechnic University
Year: 2019

description: Tungsten trioxide (WO3) has excellent mechanical properties, making them to be applied in various applications. However, researches on the mechanical properties of WO3 in the micrometer scale are limited. Here, the purpose of this study was to demonstrate nanoindentation technique in an attempt to study the micro-mechanical characteristics of monoclinic WO3 microparticles that were previously synthesized using a direct heat treatment of ammonium tungstate pentahydrate powder at a temperature of 800°C. The experiment comprises a measurement by load controlled nanoindentation test on the particle sample to obtain force and displacement relationship. The results exhibited variability on the forcedisplacement curves for similar applied load. This could be due to the micro-mechanical effects generated by the existence of inclusions, precipitates, and oxides inside the micron WO3 particles. The present study demonstrates the importance of understanding the micromechanical characteristics of WO3 for clarifying the inhomogeneity effects on its macromechanical properties.
Ein Framework zur verteilten Produktion von Präsentationsaufzeichnungen
Creators: name: Einhorn, Ralf
Publisher: name: Hannover : Universität
Year: 2005
Subjects: subject: Verteilte Systeme
subject: Präsentationsaufzeichnung
subject: Medienproduktion
subject: Metadaten
subject: E-Learning
subject: Dewey Decimal Classification::300 | Sozialwissenschaften, Soziologie, Anthropologie::370 | Erziehung, Schul- und Bildungswesen

description: [no abstract]
Fast-forwarding quantum simulation with real-time quantum Krylov subspace algorithms
Creators: name: Cortes, Cristian L.
name: DePrince, A. Eugene
name: Gray, Stephen K.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: Quantum subspace diagonalization (QSD) algorithms have emerged as a competitive family of algorithms that avoid many of the optimization pitfalls associated with parameterized quantum circuit algorithms. While the vast majority of the QSD algorithms have focused on solving the eigenpair problem for ground, excited-state, and thermal observable estimation, there has been a lot less work in considering QSD algorithms for the problem of quantum dynamical simulation. In this work, we propose several quantum Krylov fast-forwarding (QKFF) algorithms capable of predicting long-time dynamics well beyond the coherence time of current quantum hardware. Our algorithms use real-time evolved Krylov basis states prepared on the quantum computer and a multi-reference subspace method to ensure convergence towards high-fidelity, long-time dynamics. In particular, we show that the proposed multi-reference methodology provides a systematic way of trading off circuit depth with classical post-processing complexity. We also demonstrate the efficacy of our approach through numerical implementations for several quantum chemistry problems including the calculation of the auto-correlation and dipole moment correlation functions
Vertical GaN Diode BV Maximization through Rapid TCAD Simulation and ML-enabled Surrogate Model
Creators: name: Lu, Albert
name: Marshall, Jordan
name: Wang, Yifan
name: Xiao, Ming
name: Zhang, Yuhao
name: Wong, Hiu Yung
Publisher: name: arXiv
Year: 2022
Subjects: subject: Machine Learning (cs.LG)
subject: Signal Processing (eess.SP)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: In this paper, two methodologies are used to speed up the maximization of the breakdown volt-age (BV) of a vertical GaN diode that has a theoretical maximum BV of ~2100V. Firstly, we demonstrated a 5X faster accurate simulation method in Technology Computer-Aided-Design (TCAD). This allows us to find 50% more numbers of high BV (>1400V) designs at a given simulation time. Secondly, a machine learning (ML) model is developed using TCAD-generated data and used as a surrogate model for differential evolution optimization. It can inversely design an out-of-the-training-range structure with BV as high as 1887V (89% of the ideal case) compared to ~1100V designed with human domain expertise.
description: 4 pages, 7 figures
Estimators of Binary Spatial Autoregressive Models: A Monte Carlo Study
Creators: name: Calabrese, Raffaella
name: Elkink, Johan A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Methodology (stat.ME)
subject: FOS: Computer and information sciences
subject: 62J12

description: The goal of this paper is to provide a cohesive description and a critical comparison of the main estimators proposed in the literature for spatial binary choice models. The properties of such estimators are investigated using a theoretical and simulation study. To the authors' knowledge, this is the first paper that provides a comprehensive Monte Carlo study of the estimators' properties. This simulation study shows that the Gibbs estimator Le Sage (2000) performs best for low spatial autocorrelation, while the Recursive Importance Sampler Beron & Vijverberg (2004) performs best for high spatial autocorrelation. The same results are obtained by increasing the sample size. Finally, the linearized General Method of Moments estimator Klier & McMillen (2008) is the fastest algorithm that provides accurate estimates for low spatial autocorrelation and large sample size.
description: 22 pages, 1 figure, submitted for review and available as Working Papers 201215, Geary Institute, University College Dublin
Integration and characterization of solid wall electrodes in microfluidic devices fabricated in a single photolithography step
Creators: name: Herling, T. W.
name: Müller, T.
name: Rajah, L.
name: Skepper, J. N.
name: Vendruscolo, M.
name: Knowles, T. P. J.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Chemical Physics (physics.chem-ph)
subject: Quantitative Methods (q-bio.QM)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: We describe the fabrication and characterization of solid 3-dimensional electrodes in direct contact with microfluidic channels, implemented using a single photolithography step, allowing operation in high-dielectric constant media. Incorporation and self-alignment of electrodes is achieved by combining microsolidic approaches with exploitation of the surface tension of low melting point alloys. Thus the metal forms the walls flanking the channel. We show that this approach yields electrodes with a well-defined, reproducible morphology and stable electronic properties when in contact with biochemical buffers. By combining calibration of the electric field with free-flow electrophoresis we quantify the net solvated charges of small molecules.
Combinatorial Discovery of Irradiation Damage Tolerant Nano-structured W-based alloys
Creators: name: Jo, Haechan
name: Park, Sanghun
name: You, Daegun
name: Kim, Sooran
name: Lee, Dongwoo
Publisher: name: arXiv
Year: 2022
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: One of the challenges in fusion reactors is the discovery of plasma facing materials capable of withstanding extreme conditions, such as radiation damage and high heat flux. Development of fusion materials can be a daunting task since vast combinations of microstructures and compositions need to be explored, each of which requires trial-and-error based irradiation experiments and materials characterizations. Here, we utilize combinatorial experiments that allow rapid and systematic characterizations of composition-microstructure dependent irradiation damage behaviors of nanostructured tungsten alloys. The combinatorial materials library of W-Re-Ta alloys was synthesized, followed by the high-throughput experiments for probing irradiation damages to the mechanical, thermal, and structural properties of the alloys. This highly efficient technique allows rapid identification of composition ranges with excellent damage tolerance. We find that the distribution of implanted He clusters can be significantly altered by the addition of Ta and Re, which play a critical role in determining property changes upon irradiation.
Weyl Phases in Point-Group Symmetric Superconductors
Creators: name: Shivamoggi, Vasudha
name: Gilbert, Matthew J.
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 superconductivity in a Weyl semimetal with broken time-reversal symmetry and stabilized by a point-group symmetry. The resulting superconducting phase is characterized by topologically protected bulk nodes and surface states with Fermi arcs. The topological invariant governing the system is calculated using changes in eigenvalues of the point-group operator along high-symmetry momentum lines. We show that this invariant is determined by the Fermi surface topology of the Weyl semimetal. We discuss the effect of surface orientation and $C_4$-breaking strain as possible experimental consequences.
description: 10 pages, 6 figures
Spectropolarimetric measurements of hidden broad lines in nearby megamaser galaxies: a lack of clear evidence for a correlation between black hole masses and virial products
Creators: name: Linzer, Nora B.
name: Goulding, Andy D.
name: Greene, Jenny E.
name: Hickox, Ryan C.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: High-accuracy black hole (BH) masses require excellent spatial resolution that is only achievable for galaxies within ~100 Mpc using present-day technology. At larger distances, BH masses are often estimated with single-epoch scaling relations for active galactic nuclei. This method requires only luminosity and the velocity dispersion of the broad line region (BLR) to calculate a virial product, and an additional virial factor, $f$, to determine BH mass. The accuracy of these single-epoch masses, however, is unknown, and there are few empirical constraints on the variance of $f$ between objects. We attempt to calibrate single-epoch BH masses using spectropolarimetric measurements of nine megamaser galaxies from which we measure the velocity distribution of the BLR. We do not find strong evidence for a correlation between the virial products used for single-epoch masses and dynamical mass, neither for the megamaser sample alone or when combined with dynamical masses from reverberation mapping modeling. Furthermore, we find evidence that the virial parameter $f$ varies between objects, but we do not find strong evidence for a correlation with other observable parameters such as luminosity or broad line width. Although we cannot definitively rule out the existence of any correlation between dynamical mass and virial product, we find tension between allowed $f$ values for masers and those widely used in the literature. We conclude that the single-epoch method requires further investigation if it is to be used successfully to infer BH masses.
description: 27 pages, 17 figures, accepted by ApJ
Growing the seeds of pebble accretion through planetesimal accretion
Creators: name: Lorek, Sebastian
name: Johansen, Anders
Publisher: name: arXiv
Year: 2022
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We explore the growth of planetary embryos by planetesimal accretion up to and beyond the point where pebble accretion becomes efficient at the so-called Hill-transition mass. Both the transition mass and the characteristic mass of planetesimals formed by the streaming instability increase with increasing distance from the star. We developed a model for the growth of a large planetesimal (embryo) embedded in a population of smaller planetesimals formed in a filament by the streaming instability. The model includes in a self-consistent way the collisional mass growth of the embryo, the fragmentation of the planetesimals, the velocity evolution of all involved bodies, as well as the viscous spreading of the filament. We find that the embryo accretes all available material in the filament during the lifetime of the protoplanetary disc only in the inner regions of the disc. In contrast, we find little or no growth in the outer parts of the disc beyond 5--10 AU. Overall, our results demonstrate very long timescales for collisional growth of planetesimals in the regions of the protoplanetary disc where giant planets form. As such, in order to form giant planets in cold orbits, pebble accretion must act directly on the largest bodies present in the initial mass-function of planetesimals with little or no help from mutual collisions.
description: 12 pages, 11 figures, accepted for publication in A&A