cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Earthquakes and slip transients through multi-dimensional and multi-physics thermomechanical modeling
Creators: name: Tong, Xinyue
name: 0000-0003-0812-4510
Publisher: name: The University of Texas at Austin
Year: 2019
Subjects: Earthquake
Slow slip event
Numerical modelling
Scientific simulation
Rate and state friction
Damage/history dependent stress evolution
Finite element method
Semi-brittle shear zone
Shallow slip deficit

description: I study the physics and mechanics underlying seismic and aseismic slip. The slip behaviors are simulated by applying the rate and state friction formulation at steady state to 2D and 3D fault zones of finite thickness. The evolutionary frictional effect is modeled by the history-dependent stress and strain evolution in our model. The motivation of this research and summary of the rock friction laws’ development and application from a long-term tectonic (LTT) modeling point of view are covered in the first chapter. In the second chapter, I model fast and slow slip that have characteristics of earthquakes and slow slip events (SSEs) in which SSEs emerge at a critical friction-drop, ∆μ_c. The simulated earthquakes and SSEs have the same scaling as natural event for both stress and strain drop, as both type of events originate from shear failure. Co-seismic slip and moment release versus slip duration scale differently for earthquakes (cubic) and SSEs (linear), which indicate that energy is preferentially dissipated as kinetic energy for earthquakes. In my third chapter, I show that transients can arise spontaneously for mixed-brittle-ductile fault zones. Geological observations indicate that the core material composition in faults is highly heterogeneous. Brittle and ductile materials have velocity weakening and strengthening slip behaviors, respectively. Simulation results show that the semi-brittle shear zone forms complex fracture networks. Creeps and transients slip along few discrete fault surfaces. During earthquakes, both shear and tensile failures overwhelm the whole shear zone. This study confirms that fault core composition plays a critical role in determining slip behavior. In the last chapter, I investigate the effect of fault zone materials’ frictional properties on coseismic shallow slip deficit (SSD) at strike-slip faults. Our modeling approach generates coseismic slip profile that matches the SSD, the depth of peak slip, and the slip distribution below seismogenic zone that obtained from geodetic studies. Simulation results indicate that the frictional parameter distribution is the main factor controlling the fault zone coseismic slip profile. This study also shows that, contrary to the common belief, the shallow part of the strike-slip fault zone may have a velocity weakening slip behavior.
A perturbative study of the QCD phase diagram for heavy quarks at nonzero chemical potential: two-loop corrections
Creators: name: Maelger, J.
name: Reinosa, U.
name: Serreau, J.
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We extend a previous investigation of the QCD phase diagram with heavy quarks in the context of background field methods by including the two-loop corrections to the background field effective potential. The nonperturbative dynamics in the pure-gauge sector is modeled by a phenomenological gluon mass term in the Landau-DeWitt gauge-fixed action, which results in an improved perturbative expansion. We investigate the phase diagram at nonzero temperature and (real or imaginary) chemical potential. Two-loop corrections yield an improved agreement with lattice data as compared to the leading-order results. We also compare with the results of nonperturbative approaches. We further study the equation of state as well as the thermodynamic stability of the system at two-loop order. Finally, we show, using simple thermodynamic arguments, that the behavior of the Polyakov loops as functions of the chemical potential complies with their interpretation in terms of quark and anti-quark free energies.
description: 26 pages, 16 figures
Unsteady and heterogeneous boundary conditions and their impact on sediment transport and landscape morphology
Creators: name: Daniller-Varghese, Max Sasha
name: 0000-0002-8008-8692
Publisher: name: The University of Texas at Austin
Year: 2019
Subjects: Geomorphology
Sediment transport
Surface processes
Morphodynamics

description: While sediment transport and landscape morphology are well-characterized under the simplifying conditions of steady and uniform inputs, the effects of heterogeneity and unsteadiness are less well-constrained. This dissertation investigates the effects of heterogeneous and fluctuating inputs on upland sediment transport, coastal margin morphology and sediment routing, and turbidity current dynamics and deposition. In my first project, I characterize how cycles of flooding and normal flow influence delta island shape and evolution. Using the Surface Transport and Earth-surface Processes (STEP) Basin, located at the Morphodynamics Lab at the J. J. Pickle Research Center, I determine the morphological effects of mixed transport type, where sediment is alternately suspended and delivered as bedload in floods and normal flow. The cumulative effect of these types of transport forms a flow bifurcation around a delta island. I find that delta islands are a consequence of mixed transports, rather than an invariant consequence of turbulent jet expansion into a still basin. Second, I investigate the effects that surface waves have in affecting turbidity current sediment transport and mixing. I conducted experiments in the Long Flume at the Experimental Sedimentology Lab, running simulated turbidity currents through a wave field. After applying a mixing model, I determine that a wave field fundamentally changes the mixing and turbulent behavior of a turbidity current, leading to an increase in downslope sediment transport. Lastly, I investigate dense tracer particle transport in an experimental fluvial bedform, also in the Long Flume. I find that dense tracer minerals' transport is decoupled from bulk quartz sediment bedload transport. Collectively, these investigations represent a synoptic view of sediment transport and the effect that unsteadiness and heterogeneity have on dynamics of sediment transport and consequent morphology of sedimentary landscapes.
title: Ubykh2, listeXXX
Creators: name: Michailovsky, Boyd
name: Dumézil, Georges
Publisher: name: COCOON - https://cocoon.huma-num.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2011
Subjects: subject: Ubykh
subject: uby

description: Conforms to: doi:10.34847/cocoon.49aefa90-8c1f-3ba8-a099-0ebefc6a2aa7
Imaging of Ultraluminous Infrared Galaxies in the Near-UV
Creators: name: Surace, Jason A.
name: Sanders, D. B.
Publisher: name: arXiv
Year: 2000
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present the first ground-based U' (3410 angstroms) images of Ultraluminous Infrared Galaxies (ULIGs). Strong U' emission (median total M_U' = -20.8) is seen in all systems and in some cases the extended tidal features (both the smooth stellar distribution and compact star-forming features) contribute up to 60-80% of the total flux. The star-forming regions in both samples are found to have ages based on spectral synthesis models in the range 10-100 Myrs, and most differences in color between them can be attributed to the effects of dust reddening. Additionally, it is found that star-formation in compact knots in the tidal tails is most prominent in those ULIGs which have double nuclei, suggesting that the star-formation rate in the tails peaks prior to the actual coalescence of the galaxy nuclei and diminishes quickly thereafter. Similar to results at other wavelengths, the observed star formation at U' can only account for a small fraction of the known bolometric luminosity of the ULIGs. Azimuthally averaged radial light profiles at U' are characterized by a sersic law with index n=2, which is intermediate between an exponential disk and an r^(-1/4) law and closely resembles the latter at large radii. The implications of this near-ultraviolet imaging for optical/near-infrared observations of high redshift counterparts of ULIGs are discussed.
description: 30 pages, 4 tables, and 9 figures, 2 of which are JPEGs. To appear in the August, 2000 edition of the Astronomical Journal
title: Ubykh2, listeXXXI1
Creators: name: Michailovsky, Boyd
name: Dumézil, Georges
Publisher: name: COCOON - https://cocoon.huma-num.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2011
Subjects: subject: Ubykh
subject: uby

description: Conforms to: doi:10.34847/cocoon.49aefa90-8c1f-3ba8-a099-0ebefc6a2aa7
Robust Validation: Confident Predictions Even When Distributions Shift
Creators: name: Cauchois, Maxime
name: Gupta, Suyash
name: Ali, Alnur
name: Duchi, John C.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (stat.ML)
subject: Machine Learning (cs.LG)
subject: Methodology (stat.ME)
subject: FOS: Computer and information sciences

description: While the traditional viewpoint in machine learning and statistics assumes training and testing samples come from the same population, practice belies this fiction. One strategy -- coming from robust statistics and optimization -- is thus to build a model robust to distributional perturbations. In this paper, we take a different approach to describe procedures for robust predictive inference, where a model provides uncertainty estimates on its predictions rather than point predictions. We present a method that produces prediction sets (almost exactly) giving the right coverage level for any test distribution in an $f$-divergence ball around the training population. The method, based on conformal inference, achieves (nearly) valid coverage in finite samples, under only the condition that the training data be exchangeable. An essential component of our methodology is to estimate the amount of expected future data shift and build robustness to it; we develop estimators and prove their consistency for protection and validity of uncertainty estimates under shifts. By experimenting on several large-scale benchmark datasets, including Recht et al.'s CIFAR-v4 and ImageNet-V2 datasets, we provide complementary empirical results that highlight the importance of robust predictive validity.
description: Published in the Journal of the American Statistical Association (JASA 2024)
MAXIMA-1: A Measurement of the Cosmic Microwave Background Anisotropy on angular scales of 10 arcminutes to 5 degrees
Creators: name: Hanany, S.
name: Ade, P.
name: Balbi, A.
name: Bock, J.
name: Borrill, J.
name: Boscaleri, A.
name: de Bernardis, P.
name: Ferreira, P. G.
name: Hristov, V. V.
name: Jaffe, A. H.
name: Lange, A. E.
name: Lee, A. T.
name: Mauskopf, P. D.
name: Netterfield, C. B.
name: Oh, S.
name: Pascale, E.
name: Rabii, B.
name: Richards, P. L.
name: Smoot, G. F.
name: Stompor, R.
name: Winant, C. D.
name: Wu, J. H. P.
Publisher: name: arXiv
Year: 2000
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present a map and an angular power spectrum of the anisotropy of the cosmic microwave background (CMB) from the first flight of MAXIMA. MAXIMA is a balloon-borne experiment with an array of 16 bolometric photometers operated at 100 mK. MAXIMA observed a 124 square degrees region of the sky with 10 arcminute resolution at frequencies of 150, 240 and 410 GHz. The data were calibrated using in-flight measurements of the CMB dipole anisotropy. A map of the CMB anisotropy was produced from three 150 and one 240 GHz photometer without need for foreground subtractions. Analysis of this CMB map yields a power spectrum for the CMB anisotropy over the range 36 < l < 785. The spectrum shows a peak with an amplitude of 78 +/- 6 micro-Kelvin at l ~ 220 and an amplitude varying between ~40 micro-Kelvin and ~50 micro-Kelvin for 400 < l < 785.
description: Reflects version accepted for publication in Ap J Letters
Anisotropic surface energy formulations and their effect on stability of a growing thin film
Creators: name: Korzec, Maciek D.
name: Münch, Andreas
name: Wagner, Barbara
Publisher: name: Weierstrass Institute
Year: 2012
Subjects: subject: Anisotropic surface energy
subject: high order partial differential equations
subject: pseudo-spectral methods
subject: surface diffusion
subject: 35G20
subject: 74S25

description: In this paper we revisit models for the description of the evolution of crystalline films with anisotropic surface energies. We prove equivalences of symmetry properties of anisotropic surface energy models commonly used in the literature. Then we systematically develop a framework for the derivation of surface diffusion models for the self-assembly of quantum dots during Stranski-Krastanov growth that include surface energies also with large anisotropy as well as the effect of wetting energy, elastic energy and a randomly perturbed atomic deposition flux. A linear stability analysis for the resulting sixth-order semilinear evolution equation for the thin film surface shows that that the new model allows for large anisotropy and gives rise to the formation of anisotropic quantum dots. The nonlinear three-dimensional evolution is investigated via numerical solutions. These suggest that increasing anisotropy stabilizes the faceted surfaces and may lead to a dramatic slow-down of the coarsening of the dots.
Dynamical phenomena at the inner edge of the Keeler gap
Creators: name: Tajeddine, Radwan
name: Nicholson, Philip D.
name: Tiscareno, Matthew S.
name: Hedman, Matthew M.
name: Burns, Joseph A.
name: Moutamid, Maryame El
Publisher: name: arXiv
Year: 2017
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We analyze several thousand Cassini ISS images in order to study the inner edge of the Keeler gap in Saturn's outer A ring. We find strong evidence for an m=32 perturbation with a mean amplitude of radial variation of 4.5 km. Phase analysis yields a pattern speed consistent with the mean motion of Prometheus, indicating that this pattern is generated by the 32:31 Inner Lindblad resonance with Prometheus. In addition, we find evidence of 18-lobed and 20-lobed patterns with amplitudes of ~1.5 km. These patterns, whose rotation rates correspond to resonance locations ~4 km interior to the gap edge, are believed to be normal modes. The former is probably related to the nearby 18:17 (m=18) resonance with Pandora. In addition to these resonant and normal mode patterns, we also observe multiple localized features that appear to move at the local keplerian rate and that persist for only a few months. One hypothesis is that different groups of ring particles at the inner edge of the gap may be reacting differently to the resonance with Prometheus, with local variations in the forced eccentricity and/or pericenter; an alternative hypothesis is the existence of several unseen objects embedded at or near the inner edge of the Keeler gap, similar to those suspected to exist at the outer edges of the A and B rings (Spitale and Porco 2009, 2010). In either case, observations of the ring edge at opposite ansae demonstrate that the localized features must be on eccentric orbits.
title:  Late Cretaceous Foraminifera as Indicators of Sequence Boundaries, Book Cliffs, Utah, U.S.A.
Creators: name: Smith, Kimberly A.
Publisher: name: Old Dominion University
publisherIdentifier: https://ror.org/04zjtrb98
publisherIdentifierScheme: ROR
Year: 1995

description: Foraminiferal assemblages were described from three different depositional settings within the Upper Cretaceous (Campanian) Blackhawk Formation of Utah (known marginal marine environments, known marine environments, and along a suspected sequence boundary). Assemblages from the known marginal marine setting (as defined by sedimentologic-stratigraphic criteria) consisted of entirely agglutinated taxa dominated by Textularia sp. A. Assemblages from the known marine environment consisted of a mix of calcareous and agglutinated species, dominated by calcareous species (e.g., Gavelinella talaria). The foraminiferal assemblages from these known environments provide independent evidence that these sampled areas are characterized by marginal marine and fully marine deposits.

The foraminiferal data from the known environments were used to aid paleoenvironmental interpretation of the foraminiferal assemblages in samples associated with a suspected sequence boundary. Samples were taken from a 1 to 1.5 meter thick unit along 13km of continuous outcrop. This unit lies directly above delta front and lower shoreface deposits, and immediately above a surface suspected to be a sequence boundary. Foraminiferal assemblages from the unit above the suspected sequence boundary consist of entirely agglutinated assemblages in the landward direction to a mixed calcareous-agglutinated (agglutinated dominant) assemblage in the seaward direction. Based on data collected from the known environments, the entire 13km extent of this unit is interpreted as marginal marine, and provides unequivocal evidence that the suspected sequence boundary does, indeed, represent a surface of sea-level fall with a concomitant basinward shift of facies. Thus, the sampled unit immediately above the surface of sea-level fall is interpreted as a transgressive systems tract which formed during the subsequent sea-level rise.

Foraminiferal data can provide valuable information for the identification of a sequence boundary under similar conditions outlined in this study. This micropaleontologic approach may be most useful for high-frequency sequences where systems tracts are thin, and where sedimentologic-stratigraphic data prove to be equivocal.
On elliptic and parabolic regularity for mixed boundary value problems
Creators: name: Haller-Dintelmann, Robert
name: Jonsson, Alf
name: Knees, Dorothee
name: Rehberg, Joachim
Publisher: name: Weierstrass Institute
Year: 2012
Subjects: subject: mixed boundary conditions interpolation
subject: elliptic regularity for equations and systems
subject: analytic semigroups
subject: 35B65
subject: 35J47
subject: 35J57
subject: 74B05

description: We study second order equations and systems on non-Lipschitz domains including mixed boundary conditions. The key result is interpolation for suitable function spaces.
Forecasting Player Behavioral Data and Simulating in-Game Events
Creators: name: Guitart, Anna
name: Chen, Pei Pei
name: Bertens, Paul
name: Periáñez, África
Publisher: name: arXiv
Year: 2017
Subjects: subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: Understanding player behavior is fundamental in game data science. Video games evolve as players interact with the game, so being able to foresee player experience would help to ensure a successful game development. In particular, game developers need to evaluate beforehand the impact of in-game events. Simulation optimization of these events is crucial to increase player engagement and maximize monetization. We present an experimental analysis of several methods to forecast game-related variables, with two main aims: to obtain accurate predictions of in-app purchases and playtime in an operational production environment, and to perform simulations of in-game events in order to maximize sales and playtime. Our ultimate purpose is to take a step towards the data-driven development of games. The results suggest that, even though the performance of traditional approaches such as ARIMA is still better, the outcomes of state-of-the-art techniques like deep learning are promising. Deep learning comes up as a well-suited general model that could be used to forecast a variety of time series with different dynamic behaviors.
Fast and Eager k-Medoids Clustering: O(k) Runtime Improvement of the PAM, CLARA, and CLARANS Algorithms
Creators: name: Schubert, Erich
name: Rousseeuw, Peter J.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (cs.LG)
subject: Artificial Intelligence (cs.AI)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: Clustering non-Euclidean data is difficult, and one of the most used algorithms besides hierarchical clustering is the popular algorithm Partitioning Around Medoids (PAM), also simply referred to as k-medoids clustering. In Euclidean geometry the mean-as used in k-means-is a good estimator for the cluster center, but this does not exist for arbitrary dissimilarities. PAM uses the medoid instead, the object with the smallest dissimilarity to all others in the cluster. This notion of centrality can be used with any (dis-)similarity, and thus is of high relevance to many domains and applications. A key issue with PAM is its high run time cost. We propose modifications to the PAM algorithm that achieve an O(k)-fold speedup in the second ("SWAP") phase of the algorithm, but will still find the same results as the original PAM algorithm. If we relax the choice of swaps performed (while retaining comparable quality), we can further accelerate the algorithm by eagerly performing additional swaps in each iteration. With the substantially faster SWAP, we can now explore faster initialization strategies, because (i) the classic ("BUILD") initialization now becomes the bottleneck, and (ii) our swap is fast enough to compensate for worse starting conditions. We also show how the CLARA and CLARANS algorithms benefit from the proposed modifications. While we do not study the parallelization of our approach in this work, it can easily be combined with earlier approaches to use PAM and CLARA on big data (some of which use PAM as a subroutine, hence can immediately benefit from these improvements), where the performance with high k becomes increasingly important. In experiments on real data with k=100,200, we observed a 458x respectively 1191x speedup compared to the original PAM SWAP algorithm, making PAM applicable to larger data sets, and in particular to higher k.
Finite element methods for the time-dependent Ginzburg-Landau model of superconductivity
Creators: name: Du, Qiang
Publisher: name: Carnegie Mellon University
Year: 1993
Subjects: subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics

description: Abstract: "The initial-boundary value problem for the time-dependent Ginzburg-Landau equations that model the macroscopic behavior of superconductors is considered. The convergence of finite-dimensional, semi-discrete Galerkin approximations is studied as is a fully-discrete scheme. The results of some computational experiments are presented."
title: Ubykh2, listeXXXI2
Creators: name: Michailovsky, Boyd
name: Dumézil, Georges
Publisher: name: COCOON - https://cocoon.huma-num.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2011
Subjects: subject: Ubykh
subject: uby

description: Conforms to: doi:10.34847/cocoon.49aefa90-8c1f-3ba8-a099-0ebefc6a2aa7
3D Lorentzian Quantum Gravity from the asymmetric ABAB matrix model
Creators: name: Ambjorn, J.
name: Jurkiewicz, J.
name: Loll, R.
name: Vernizzi, G.
Publisher: name: arXiv
Year: 2003
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: The asymmetric ABAB-matrix model describes the transfer matrix of three-dimensional Lorentzian quantum gravity. We study perturbatively the scaling of the ABAB-matrix model in the neighbourhood of its symmetric solution and deduce the associated renormalization of three-dimensional Lorentzian quantum gravity.
description: 21 pages, typo in references corrected
Bessel bridges decomposition with varying dimension. Applications to finance
Creators: name: Faraud, Gabriel
name: Goutte, Stéphane
Publisher: name: Weierstrass Institute
Year: 2012
Subjects: subject: Squared Bessel process
subject: Bessel bridges decomposition
subject: Laplace transform
subject: Lévy Ito representation
subject: Financial applications
subject: 60G07
subject: 60H35
subject: 91B70

description: We consider a class of stochastic processes containing the classical and well-studied class of Squared Bessel processes. Our model, however, allows the dimension be a function of the time. We first give some classical results in a larger context where a time-varying drift term can be added. Then in the non-drifted case we extend many results already proven in the case of classical Bessel processes to our context. Our deepest result is a decomposition of the Bridge process associated to this generalized squared Bessel process, much similar to the much celebrated result of J. Pitman and M. Yor. On a more practical point of view, we give a methodology to compute the Laplace transform of additive functionals of our process and the associated bridge. This permits in particular to get directly access to the joint distribution of the value at $t$ of the process and its integral. We finally give some financial applications to illustrate the panel of applications of our results.
Anomaly in the charge radii of Pb isotopes
Creators: name: Sharma, M. M.
name: Lalazissis, G. A.
name: Ring, P.
Publisher: name: arXiv
Year: 1993
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The anomalous behaviour of the charge radii of the isotopic chain of Pb nuclei has been studied in the relativistic mean field theory. It has been shown that the relativistic mean field provides an excellent description of the anomalous kink in the isotopic shifts about $^{208}$Pb. This contrasts strongly from the Skyrme mean field, where almost all the known and realistic forces fail to reproduce the observed trend in the empirical data on the charge radii. The results have been discussed in the perspective of differences in the ansätze of the relativistic and the Skyrme mean-field theories.
description: 10 pages (Latex) and 3 figures (avilable upon request); Phys. Lett. B (in print), TUM-ITP-SH93/2
Fiber Bundle Codes: Breaking the $N^{1/2} \operatorname{polylog}(N)$ Barrier for Quantum LDPC Codes
Creators: name: Hastings, Matthew B.
name: Haah, Jeongwan
name: O'Donnell, Ryan
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Information Theory (cs.IT)
subject: Combinatorics (math.CO)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: We present a quantum LDPC code family that has distance $Ω(N^{3/5}/\operatorname{polylog}(N))$ and $\tildeΘ(N^{3/5})$ logical qubits. This is the first quantum LDPC code construction which achieves distance greater than $N^{1/2} \operatorname{polylog}(N)$. The construction is based on generalizing the homological product of codes to a fiber bundle.
description: 39 pages, 2 figures; v2 gives self-contained presentation of weight reduction using weight reduction for classical base code. Also contains explanation of relation between codes in terms of homotopy equivalence of chain complexes
Finding a Maximum Matching in a Sparse Random Graph in O(n) Expected Time
Creators: name: Chebolu, Prasad
name: Frieze, Alan
name: Pall  Melsted
Publisher: name: Carnegie Mellon University
Year: 2012
Subjects: subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics

description: We present a linear expected time algorithm for finding maximum cardinality matchings in sparse random graphs. This is optimal and improves on previous results by a logarithmic factor.
On the relative Gersten conjecture for Milnor K-theory in the smooth case
Creators: name: Lüders, Morten
Publisher: name: arXiv
Year: 2020
Subjects: subject: Algebraic Geometry (math.AG)
subject: K-Theory and Homology (math.KT)
subject: FOS: Mathematics

description: We show that the Gersten complex for the (improved) Milnor K-sheaf on a smooth scheme over an excellent discrete valuation ring is exact except at the first place and that exactness at the first place may be checked at the discrete valuation ring associated to the the generic point of the special fiber. This complements results of Gillet and Levine for K-theory, Geisser for motivic cohomology and Schmidt and Strunk and the author for étale cohomology.
description: Corrected, published version
title: ADCO, Ordre cistercien : comptes (1499-1515) (11 H 1162), f. 00460
Creators: name: de la Côte-d'Or, Archives départementales
name: Archives Départementales De La Côte-D'Or
name: Petot, Frédérique
name: Projet CBMA
name: CBMA/CG21/F.PETOT/2019
name: Petot, Frédéric
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2020
Subjects: subject: Corpus Burgundiae Medii Aevi
subject: Chartes de la Bourgogne du Moyen Âge
subject: comptes
subject: LaMOP
subject: Laboratoire de Médiévistique Occidentale de Paris

description: Ordre cistercien : comptes (1499-1515), Archives départementales de la Côte-d'Or, (11 H 1162). Numérisation en mode image.
description: Relation: http://www.cbma-project.eu/
description: Bibliographic citation: Ordre cistercien : comptes (1499-1515), Archives départementales de la Côte-d'Or, (11 H 1162), f. 00460, in Projet CBMA - Corpus Burgundiae Medii Aevi \[Ressource en ligne\], https:// manuscrits.cbma-project.eu/
description: Provenance: https://www.geonames.org/3024876
description: Provenance: http://www.idref.fr/030974844/id
description: Provenance: https://catalogue.bnf.fr/ark:/12148/cb12228351v
description: Provenance: abbaye de Cîteaux
description: Provenance: http://www.wikidata.org/entity/Q843261
title: Ubykh2, listeXXXII
Creators: name: Michailovsky, Boyd
name: Dumézil, Georges
Publisher: name: COCOON - https://cocoon.huma-num.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2011
Subjects: subject: Ubykh
subject: uby

description: Conforms to: doi:10.34847/cocoon.49aefa90-8c1f-3ba8-a099-0ebefc6a2aa7
An oscillating Casimir potential between two impurities in a spin-orbit coupled Bose-Einstein condensate
Creators: name: He, Pei-Song
name: Sun, Qing
name: Ji, An-Chun
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We study the Casimir potential between two impurities immersed in a spin-orbit coupled BoseEinstein condensate (BEC) with plane-wave order. We find that, by exchanging the virtual phonons/excitations, a remarkable anisotropic oscillating potential with both positive and negative parts can be induced between the impurities, with the period of the oscillation depending on the spin-orbit coupling strength. As a consequence, this would inevitably lead to a non-central Casimir force, which can be tuned by varying the strength of spin-orbit coupling . These results are elucidated for BECs with one-dimensional Raman-induced and two-dimensional Rashba-type SOC.
description: 6 pages, 3 figures
Novel (U-Th)/He thermochronometric constraints on serpentinized ultramafic rocks
Creators: name: Cooperdock, Emily Jane
Publisher: name: The University of Texas at Austin
Year: 2017
Subjects: (U-Th)/He chronometry
Serpentinization
Magnetite
Spinel
Peridotite
Alps
Cyclades
Oman

description: Serpentinization, the hydration of peridotite, is a widespread process that impacts rheological properties along plate boundaries, fluid-mobile element cycling and biogeochemical processes. While numerous studies exist on the petrology, structure and geochemistry of serpentinites, geochronological analysis has been elusive due to the lack minerals with well-established dating techniques. With technological advances in radiogenic isotope analysis in the past decade, it is now possible to address the timing of serpentinization by dating the growth of magnetite that forms as a direct result of the breakdown of primary peridotite phases in the presence of water. This study develops and applies a (U-Th)/He-based method that is tailored to analyze magnetite that grow during the alteration of ultramafic rocks. The technique includes procedures to screen for grain quality in opaque phases with X-Ray Computed Tomography, physical air abrasion to remove the alpha implantation/ejection zone in the outer grain boundary, and analytical procedures to measure low parent nuclide concentrations typical of these lithologies. The method is then modified to test the applicability to date magmatic spinel, a primary mineral phase in peridotite, to date peridotite exhumation by tectonic and volcanic processes. The magnetite (U-Th)/He technique is applied to serpentinites within an exhumed subduction complex in Syros, Greece, uplifted serpentinites within the Malenco Ultramafic Unit, Italian Alps, and to carbonated serpentinite in Wadi Fins, Oman. The results of these studies provide evidence for episodic or continuous magnetite growth over millions of years, which implies that magnetite formation can continue to occur in serpentinites under changing metamorphic conditions. These studies also show that multiple generations of magnetite growth can be distinguished based on magnetite grain size and trace element chemistry, and that hydrothermal magnetite can record changing chemical conditions and act as an important host phase of U and Th in serpentinites. Overall, the magnetite (U-Th)/He chronometer can be used to distinguish between multiple episodes of fluid-rock alteration, which has implications for the cooling history and geochemical exchanges in serpentinized peridotite. This technique, coupled with spinel (U-Th)/He, has broad applicability to investigate the timescales of mantle exhumation and alteration of ultramafic rocks in a variety of tectonic settings.
Quark-sector Lorentz violation in $Z$-boson production
Creators: name: Lunghi, Enrico
name: Sherrill, Nathan
name: Szczepaniak, Adam
name: Vieira, Alexandre
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Quark-sector Lorentz violation is studied in the context of Drell-Yan dilepton production including effects from Z-boson exchange. We show the chiral nature of the weak interactions enables parity-violating and spin-dependent effects to be studied using unpolarized initial states. Constraints are placed on dimensionless and CPT-even coefficients for Lorentz violation for the first two generations of quarks using measurements from the Large Hadron Collider.
description: Typos in Eq. 3.14 addressed, leading to an updated figure and tables. Conclusions unchanged
Integrable Spin Chain and Operator Mixing in N=1,2 Supersymmetric Theories
Creators: name: Wang, Xiao-Jun
name: Wu, Yong-Shi
Publisher: name: arXiv
Year: 2003
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study operator mixing, due to planar one-loop corrections, for composite operators in D=4 supersymmetric theories. We present some N=1,2 Yang-Mills and Wess-Zumino models, in which the planar one-loop anomalous dimension matrix in the sector of holomorphic scalars is identified with the Hamiltonian of an integrable quantum spin chain of SU(3) or SU(2) symmetry, even if the theory is away from the conformal points. This points to a more universal origin of the integrable structure beyond superconformal symmetry. We also emphasize the role of the superpotential in the appearance of the integrable structure. The computations of operator mixing in our examples by solving Bethe Ansatz equations show some new features absent in N=4 SYM.
description: 30 pages, 3 eps figs, V2: typos corrected and references added
title: Fluid Inclusion Studies of the Morefield Pegmatite Amelia County, Virginia
Creators: name: Smerekanicz, John Richard
Publisher: name: Old Dominion University
publisherIdentifier: https://ror.org/04zjtrb98
publisherIdentifierScheme: ROR
Year: 1992

description: he Morefield Pegmatite is a planar, nearly vertical body situated in Grenville age gneisses and schists in the southeast Piedmont of Virginia. It consists of a mineralogically simple albite-quartz outer zone and a texturally and mineralogically complex inner zone of microcline-topaz-quartz, with trace amounts of rare-element minerals. Fluid inclusions in samples of quartz, topaz, beryl, spessartite and albite that span the length, width and depth of both zones can be classified by chemical composition into two main groups: H2O-rich solutions and CO2- H2O -rich fluids. The H2O -rich inclusions consist of H2O -rich liquid and H2O vapor, occur in microfractures (secondary fluid origin), have a fairly constant liquid:vapor ratio, almost never exceed 30 μm in diameter, and have mostly uniform, distinctive textures. Three fluid phase CO2-H2O inclusions consisting of an outer H2O-rich liquid, an intermediate CO2-rich liquid, and an inner CO2 vapor, occur in microfractures (also secondary in origin), and have widely variable textures and sizes. A third type of inclusion consists of two- and three-fluid phases and contains up to five solid, anisotropic daughter minerals. The two main types were found in all areas sampled, while the third type was only found in the inner zone.

Microthermometry indicates that the H2O-rich inclusions consist of salt solutions, with a range of NaCl equivalent of 0 to 13 wt%. CO2-H2O fluids consist of 40 to 95 % CO2 (by volume) and also contain H2O-salt solutions up to 10% NaCl equivalent (by weight). At least three different H2O -rich inclusion populations with unique salt contents and at least two different populations of CO2-H2O inclusions exist. Throughout the pegmatite, the CO2 phase is very pure with respect to CH4 and other volatiles.

The microthermometry data indicate that there is no distinct distribution of inclusion types according to mineralogic zone. Assuming igneous inclusion origin, preliminary estimates of maximum pressure and temperature of pegmatite formation are 2.8 kilobars and 550-600°C. However, several different fluid generating events are inferred from the variety of different inclusion populations, including at least three volatile/solute-rich pegmatite fluids, fluids related to post-pegmatite hydrothermal alteration, and possibly subsequent metamorphic fluid migration. Large amounts of secondary inclusions indicate that the fluids originally trapped may have evolved in a complex manner after the pegmatite crystallized. This, along with post-entrapment alteration of the third inclusion type, inferred to be the most closely related to the last pegmatitic fluid, severely limits petrogenetic constraints that can be derived from fluid inclusion data.
Dissipative quantum mechanics using GENERIC
Creators: name: Mielke, Alexander
Publisher: name: Weierstrass Institute
Year: 2012
Subjects: subject: Quantum mechanics
subject: density matrices
subject: Hamiltonian systems
subject: gradient systems
subject: Onsager systems
subject: GENERIC
subject: von Neumann entropy
subject: canonical correlation
subject: 34D20
subject: 37N20
subject: 47N50
subject: 80A99
subject: 81Q05
subject: 81V19

description: Pure quantum mechanics can be formulated as a Hamiltonian system in terms of the density matrix. Dissipative effects are modeled via coupling to a macroscopic system, where the coupling operators act via commutators. Following Öttinger (2010) we use the GENERIC framework (General Equations for Non-Equilibrium Reversible Irreversible Coupling) to construct thermodynamically consistent evolution equations as a sum of a Hamiltonian and a gradient-flow contribution, which satisfy a particular non-interaction condition. One of our models couples a quantum system to a finite number of heat baths each of which is described by a time-dependent temperature. The dissipation mechanism is modeled via the canonical correlation operator, which is the inverse of the Kubo-Mori metric for density matrices and which is strongly linked to the von Neumann entropy for quantum systems. Thus, one recovers the dissipative double-bracket operators of the Lindblad equations but encounters a correction term for the consistent coupling to the dissipative dynamics. For the finite-dimensional and isothermal case we provide a general existence result and discuss sufficient conditions that guarantee that all solutions converge to the unique thermal equilibrium state. Finally, we compare of our gradient flow formulation for quantum systems with the Wasserstein gradient flow formulation for the Fokker-Planck equation and the entropy gradient flow formulation for reversible Markov chains.
Effect of Lead Substitution on LaO0.5F0.5BiS2
Creators: name: Otsuki, S.
name: Demura, S.
name: Sakai, Y.
name: Fujisawa, Y.
name: Sakata, H.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We examined Lead (Pb) Substitution effect on a single crystal of a layered superconductor LaO0.5F0.5BiS2. Pb concentration dependence of the lattice constant showed slight anomaly at about 8% and 9% substitution of Pb for Bi. These samples showed the enhancement of the superconducting transition temperature and the superconducting volume fraction. Furthermore, these samples showed the anomaly in the temperature dependence of the resistivity at about 150K. These results were not observed in Pb substituted NdO0.7F0.3BiS2. Therefore, the enhancement of the superconducting properties by Pb substitution is related to the structural instability for the pale perturbation in LaO0.5F0.5BiS2.
description: 8 pages, 4 figures, to be published in Solid State Communications
Corrective advertising : new remedy for an old problem
Creators: name: Norman, Charles H.
Publisher: name: The University of Texas at Austin
Year: 1974
Subjects: subject: Corrective advertising--United States
subject: Deceptive advertising--United States
subject: Mass media--United States

description: In view of the growing concern and interest dealing with truthfulness in the media and the substantiation of promotional claims, this thesis serves to bring into focus the area of deceptive and misleading advertising, and its relationship to consumers and the market. More specifically, the topic and analysis of it deals with the concept of corrective advertising. Devised by Robert Skitol and initiated by the Federal Trade Commission in 1971, the corrective advertising concept seems to be a logical and 'straight-forward' idea--when misleading or false advertising runs (usually on a national scale), and the FTC deems it as substantially misrepresenting the truth, then the Commission may require a certain proportion of future advertisements to contain a corrective message. The message supposedly clears up any misunderstanding as to the intent/truth of the original claims in the ad. The advertiser, in essence, admits no wrongdoing and the FTC handles each case on an individual basis, working out specifics, such as media schedules and wording of the corrective ad. But important questions have arisen among advertisers and their agencies--what is the FTC really up to in this new 'remedy'? Is 'corrective advertising' the best solution for countering false claims? Is corrective advertising something to concern only those who flagrantly violate the industry's regulation code?
Parabolic equations with dynamical boundary conditions and source terms on interfaces
Creators: name: Ter Elst, A.F.M.
name: Meyries, Martin
name: Rehberg, Joachim
Publisher: name: Weierstrass Institute
Year: 2012
Subjects: subject: Parabolic equation
subject: quasilinear parabolic problem
subject: mixed boundary condition
subject: dynamical boundary condition
subject: maximal parabolic Lp-regularity
subject: nonsmooth geometry
subject: nonsmooth coefficients
subject: 35K20
subject: 35K59
subject: 35M13
subject: 35R05

description: We consider parabolic equations with mixed boundary conditions and domain inhomogeneities supported on a lower dimensional hypersurface, enforcing a jump in the conormal derivative. Only minimal regularity assumptions on the domain and the coefficients are imposed. It is shown that the corresponding linear operator enjoys maximal parabolic regularity in a suitable Lp-setting. The linear results suffice to treat also the corresponding nondegenerate quasilinear problems.
The BCS wave function, matrix product states, and the Ising conformal field theory
Creators: name: Montes, Sebastian
name: Rodríguez-Laguna, Javier
name: Sierra, Germán
Publisher: name: arXiv
Year: 2017
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We present a characterization of the many-body lattice wave functions obtained from the conformal blocks (CBs) of the Ising conformal field theory (CFT). The formalism is interpreted as a matrix product state using continuous ancillary degrees of freedom. We provide analytic and numerical evidence that the resulting states can be written as BCS states. We give a complete proof that the translationally invariant 1D configurations have a BCS form and we find suitable parent Hamiltonians. In particular, we prove that the ground state of the finite-size critical Ising transverse field (ITF) Hamiltonian can be obtained with this construction. Finally, we study 2D configurations using an operator product expansion (OPE) approximation. We associate these states to the weak pairing phase of the $p+ip$ superconductor via the scaling of the pairing function and the entanglement spectrum.
description: 11 pages + Appendices
Using radar reflectivity to unlock the climate record contained in the Martian North Polar Layered Deposits
Creators: name: Lalich, Daniel E
name: 0000-0003-2091-6991
Publisher: name: The University of Texas at Austin
Year: 2017
Subjects: Mars
Polar
Radar
Climate
Ice

description: The North Polar Layered Deposits of Mars are a formation of water ice ~1000 km across and ~2 km thick. For years, scientists have looked to these layers of ice and dust as a possible source of information regarding how the planet’s climate has changed over the past ~4 million years. However, connecting these layers to specific climate conditions remains a challenge. Previous research has attempted to tie both radar stratigraphy and outcrop stratigraphy to the orbital cycles of Mars, but the proposed relationships are often contradictory, and struggle identify how specific layer properties might be tied to ancient climate. To help resolve these issues, I synthesized a combination of SHARAD radar data, HiRISE imagery, topography, and electromagnetic modeling in an effort to quantify layer properties such as thickness and composition, and connect those properties to past climate conditions. I was able to quantitatively show that a set of layers known as marker beds is likely responsible for causing radar reflectors, and was able to show how radar reflectors could be used to infer the composition and relative thickness of these layers throughout the polar cap. With this information in hand, scientists can, for the first time, begin to realize the full potential of the North Polar Layered Deposits as a global climate record of Mars.
A robust SUPG norm a posteriori error estimator for the SUPG finite element approximation of stationary convection-diffusion equations
Creators: name: John, Volker
name: Novo, Julia
Publisher: name: Weierstrass Institute
Year: 2012
Subjects: subject: stationary convection-diffusion equations
subject: SUPG finite element method
subject: error in SUPG norm
subject: a posteriori error estimator
subject: adaptive grid refinement
subject: 65N30

description: A robust residual-based a posteriori estimator is proposed for the SUPG finite element method applied to stationary convection-diffusion-reaction equations. The error in the natural SUPG norm is estimated. The main concern of this paper is the consideration of the convection-dominated regime. A global upper bound and a local lower bound for the error are derived, where the global upper estimate relies on some hypotheses. Numerical studies demonstrate the robustness of the estimator and the fulfillment of the hypotheses. A comparison to other residual-based estimators with respect to the adaptive grid refinement is also provided.