cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Optimal control of an Allen--Cahn equation with singular potentials and dynamic boundary condition
Creators: name: Colli, Pierluigi
name: Sprekels, Jürgen
Publisher: name: Weierstrass Institute
Year: 2012
Subjects: subject: optimal control
subject: parabolic problems
subject: dynamic boundary conditions
subject: optimality conditions
subject: 74M15
subject: 49K15
subject: 49K20

description: In this paper, we investigate optimal control problems for Allen--Cahn equations with singular nonlinearities and a dynamic boundary condition involving singular nonlinearities and the Laplace--Beltrami operator. The approach covers both the cases of distributed controls and of boundary controls. The cost functional is of standard tracking type, and box constraints for the controls are prescribed. Parabolic problems with nonlinear dynamic boundary conditions involving the Laplace--Beltrami operation have recently drawn increasing attention due to their importance in applications, while their optimal control was apparently never studied before. In this paper, we first extend known well-posedness and regularity results for the state equation and then show the existence of optimal controls and that the control-to-state mapping is twice continuously Fréchet differentiable between appropriate function spaces. Based on these results, we establish the first-order necessary optimality conditions in terms of a variational inequality and the adjoint state equation, and we prove second-order sufficient optimality conditions.
Phenomenology of charged-particle multiplicity distributions
Creators: name: Alkin, Anton
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Charged-particle multiplicity distributions are an interesting tool to study both soft- and hard-QCD processes in hadronic collisions. Since last century a significant range of center-of-mass energies has been probed, ranging from a few GeV to 13 TeV in the latest LHC run. Common analysis of multiplicity distributions at different energies, in different phase space regions and from sufficiently different experiments provides a way to systematize and review existing phenomenological models of multiple particle production. In this work a phenomenological model is suggested, that can describe simultaneously charged-particle multiplicity distributions in different restricted pseudorapidity intervals for proton-proton collisions. The model is successfully applied to experimental results of ALICE experiment at LHC.
description: 14 pages, 5 figures, 5 tables
Origin of shell beaches, Padre Island, Texas
Creators: name: Watson, Richard Lee, 1943-
Publisher: name: The University of Texas at Austin
Year: 1968
Subjects: subject: Beaches--Texas--Padre Island
subject: Littoral drift--Texas--Padre Island
subject: Shells--Texas--Padre Island

description: Shell-rich beaches on central Padre Island correlate with a convergence of longshore drift. Wind data collected at Corpus Christi from 1951 to 1960 and sedimentation at inlets to the north and to the south of the study area both suggest a similar convergence of longshore drift. Local highs in shell content of beach sands correspond to areas of high and continuous foredunes, whereas the position of lows correspond with small dunes and numerous hurricane channels. Waves which approach the beach obliquely, sort pelecypod valves such that if the waves approach from the right as the observer faces the sea, there is an abundance of right valves at the top of the foreshore and an abundance of left valves in the shell step at the base of the foreshore. If the waves approach obliquely from the left, the opposite sorting occurs
Table of the Sun's Anomaly - Ptolemy's Almagest by Toomer (Gerald J.) (1984) | Type-B (ID n° 200)
Creators: name: Toomer, Gerald J.
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2021
Subjects: Astronomy
History of astronomy
DISHAS
Astronomical table

description: This is a type B edition: A type-B edition corresponds to a critical edition of several table witnesses:
 it is based on several different editions, themselves based on tables from different primary sources.
 A type-B edition can be based on type-A, type-B or type-C editions.
You can find it on the DISHAS project website from this link: https://dishas.obspm.fr/table-edition/200
description: Source: Ptolemy's Almagest, Toomer (Gerald J.), 1984
Brownian occupation measures, compactness and large deviations
Creators: name: Mukherjee, Chiranjib
name: Varadhan, S. R. Srinivasa
Publisher: name: Weierstrass Institute
Year: 2015
Subjects: subject: Brownian occupation measures
subject: shift compactness
subject: large deviations
subject: 60J65
subject: 60J55
subject: 60F10

description: In proving large deviation estimates, the lower bound for open sets and upper bound for compact sets are essentially local estimates. On the other hand, the upper bound for closed sets is global and compactness of space or an exponential tightness estimate is needed to establish it. In dealing with the occupation measure $L_t(A)=frac1tint_0^t1_A(W_s) d s$ of the $d$ dimensional Brownian motion, which is not positive recurrent, there is no possibility of exponential tightness. The space of probability distributions $mathcal M_1(R^d)$ can be compactified by replacing the usual topology of weak c onvergence by the vague toplogy, where the space is treated as the dual of continuous functions with compact support. This is essentially the one point compactification of $R^d$ by adding a point at $infty$ that results in the compactification of $mathcal M_1(R^d)$ by allowing some mass to escape to the point at $infty$. If one were to use only test functions that are continuous and vanish at $infty$ then the compactification results in the space of sub-probability distributions $mathcal M_le 1(R^d)$ by ignoring the mass at $infty$. The main drawback of this compactification is that it ignores the underlying translation invariance. More explicitly, we may be interested in the space of equivalence classes of orbits $widetildemathcal M_1=widetildemathcal M_1(R^d)$ under the action of the translation group $R^d$ on $mathcal M_1(R^d)$. There are problems for which it is natural to compactify this space of orbits. We will provide such a compactification, prove a large deviation principle there and give an application to a relevant problem.
Magnetic field generation in PMS stars with and without radiative core
Creators: name: Zaire, Bonnie
name: Guerrero, Gustavo
name: Kosovichev, Alexander
name: Smolarkiewicz, Piotr
name: Landin, Natalia
Publisher: name: arXiv
Year: 2017
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Recent observations of the magnetic field in pre-main sequence stars suggest that the magnetic field topology changes as a function of age. The presence of a tachocline could be an important factor in the development of magnetic field with higher multipolar modes. In this work we performed MHD simulations using the EULAG-MHD code to study the magnetic field generation and evolution in models that mimic stars at two evolutionary stages. The stratification for both stellar phases was computed by fitting stellar structure profiles obtained with the ATON stellar evolution code. The first stage is at $1.1 \mathrm{Myr}$, when the star is completely convective. The second stage is at $14 \mathrm{Myrs}$, when the star is partly convective, with a radiative core developed up to $30\%$ of the stellar radius. In this proceedings we present a preliminary analysis of the resulting mean-flows and magnetic field. The mean-flow analysis shown that the star rotate almost rigidly on the fully convective phase, whereas at the partially convective phase there is differential rotation with conical contours of iso-rotation. As for the mean magnetic field both simulations show similarities with respect to the field evolution. However, the topology of the magnetic field is different.
description: 8 pages, 10 figures, Symposium
Properties of self-excited pulsations in 3D simulations of AGB stars and red supergiants
Creators: name: Ahmad, Arief
name: Freytag, Bernd
name: Höfner, Susanne
Publisher: name: arXiv
Year: 2022
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The characteristic variability of cool giants and supergiants is attributed to a combination of stellar pulsation and large-scale convective flows. Full 3D radiation-hydrodynamical modelling is an essential tool for understanding the nature of these dynamical processes. The parameter space in our 3D model grid of red giants has expanded in recent years. These models can provide many insights on the nature and properties of the pulsations, including the interplay between convection and pulsations. We treat 3D dynamical models of asymptotic giant branch (AGB) stars and red supergiants similar to observational data. We aim to explore the relation between stellar parameters and the properties of the self-excited pulsations. Output from global 'star-in-a-box' models computed with the CO5BOLD radiation-hydrodynamics code were analysed, particularly in regards to the pulsation properties, to find possible correlations with input and emergent stellar parameters. The fast Fourier transform was applied to spherically averaged mass flows to identify possible radial pulsation periods beneath the photosphere of the modelled stars. Stellar parameters were investigated for correlations with the extracted pulsation periods. We find that the pulsation periods varied with the stellar parameters in good agreement with the current expectations. The pulsation periods follow Ritter's period-mean density relation well and our AGB models agree with period-luminosity relations derived from observations. A mass estimate formula was derived from the 3D models, relating the stellar mass to the fundamental mode pulsation period and the stellar radius. While the non-linearity of the interplay between the self-excited pulsations and the self-consistent convection complicates analyses, the resulting correlations are in good agreement with respect to current theoretical and observational understandings.
description: 15 pages, 14 figures, 1 appendix, accepted for publication in A&A. New version corrected a typo in equation (5)
Pressure-robustness and discrete Helmholtz projectors in mixed finite element methods for the incompressible Navier--Stokes equations
Creators: name: Linke, Alexander
name: Merdon, Christian
Publisher: name: Weierstrass Institute
Year: 2016
Subjects: subject: incompressible Navier-Stokes
subject: mixed finite element methods
subject: a-priori error estimates
subject: pressure-robustness
subject: Helmholtz projector
subject: irrotational forces
subject: 76D05
subject: 65M60
subject: 65M12
subject: 47.11.Fg

description: Recently, it was understood how to repair a certain L2-orthogonality of discretely-divergence-free vector fields and gradient fields such that the velocity error of inf-sup stable discretizations for the incompressible Stokes equations becomes pressure-independent. These new 'pressure-robust' Stokes discretizations deliver a small velocity error, whenever the continuous velocity field can be well approximated on a given grid. On the contrary, classical inf-sup stable Stokes discretizations can guarantee a small velocity error only, when both the velocity and the pressure field can be approximated well, simultaneously.
 In this contribution, 'pressure-robustness' is extended to the time-dependent Navier--Stokes equations. In particular, steady and time-dependent potential flows are shown to build an entire class of benchmarks, where pressure-robust discretizations can outperform classical approaches significantly. Speedups will be explained by a new theoretical concept, the 'discrete Helmholtz projector' of an inf-sup stable discretization. Moreover, different discrete nonlinear convection terms are discussed, and skew-symmetric pressure-robust discretizations are proposed.
Image Splicing Localization Using A Multi-Task Fully Convolutional Network (MFCN)
Creators: name: Salloum, Ronald
name: Ren, Yuzhuo
name: Kuo, C. -C. Jay
Publisher: name: arXiv
Year: 2017
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: In this work, we propose a technique that utilizes a fully convolutional network (FCN) to localize image splicing attacks. We first evaluated a single-task FCN (SFCN) trained only on the surface label. Although the SFCN is shown to provide superior performance over existing methods, it still provides a coarse localization output in certain cases. Therefore, we propose the use of a multi-task FCN (MFCN) that utilizes two output branches for multi-task learning. One branch is used to learn the surface label, while the other branch is used to learn the edge or boundary of the spliced region. We trained the networks using the CASIA v2.0 dataset, and tested the trained models on the CASIA v1.0, Columbia Uncompressed, Carvalho, and the DARPA/NIST Nimble Challenge 2016 SCI datasets. Experiments show that the SFCN and MFCN outperform existing splicing localization algorithms, and that the MFCN can achieve finer localization than the SFCN.
description: This manuscript was submitted for publication
title: Corpus rassemblement de jeunes européens - Echanges entre élus et jeunes
Creators: name: Corpus De LAngue Parlée En Interaction
name: Groupe ICOR
name: Niccolaï, Gerald
Publisher: name: COCOON - https://cocoon.huma-num.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2015
Subjects: subject: Français
subject: fra

description: Interactions didactiques
description: Discours introductifs des présentations par les jeunes délégations européennes de leurs travaux sur le développement durable aux élus d’une grande ville française. Les discours sont traduits en anglais et en français par une interprète.
description: En orthographe adaptee, toilettée
description: son grésillant dans le micro de l'interprète.
description: Conforms to: doi:10.34847/cocoon.49aefa90-8c1f-3ba8-a099-0ebefc6a2aa7
description: Conforms to: Format CHAT
Patterns of weathering in sedimentary bedrock across a sequence of repeating ridges and valleys
Creators: name: Pedrazas Hinojosa, Michelle Alexandra
name: 0000-0002-2006-4920
Publisher: name: The University of Texas at Austin
Year: 2020
Subjects: Bedrock weathering
Water storage
Fracturing and oxidation
Drilling

description: Bedrock weathering plays a fundamental role in liberating nutrients, generating porosity, and producing soil. Compared to the mobile soil layer, little is known about the structure of bedrock weathering profiles across hillslopes and the extent to which observations from one hillslope can be scaled to represent other hillslopes of similar topographic form. Here, we compare patterns of bedrock weathering and water storage across a sequence of repeating ridges and valleys in the upturned sedimentary Great Valley Sequence of the eastern Northern California Coast Range. Deep drilling, downhole logging, and analysis of recovered samples reveal a common upslope thickening weathering profile across a sequence of ridges and valleys. The maximum weathering thickness at the divide is comparable across hillslopes with a nearly two-fold difference in hillslope length, suggesting that the thickness of weathering may not scale with hillslope dimensions. Within channels that bound hillslopes, bedrock cores are relatively unweathered within centimeters of the ground surface, while at ridges, the depth to the base of bedrock that is pervasively fractured and oxidized is about 7 m. Relative to fresh bedrock, matrix chips near the top of the weathered profile at the ridges have increased porosity by roughly 10% and experienced chemical denudation mass loss of 5 - 10%. Our observations reveal a pervasively weathered and fractured layer, which coincides with the oxidation front and is accompanied by unsaturated dynamic water storage. We show how hillslopes sharing the same lithology, vegetation, climate, and tectonic history also share patterns of bedrock weathering. Our data provide constraints on the mechanisms that couple the evolution of the land surface and the propagation of weathering fronts.
Do products of compact complex manifolds admit LCK metrics?
Creators: name: Ornea, Liviu
name: Verbitsky, Misha
name: Vuletescu, Victor
Publisher: name: arXiv
Year: 2022
Subjects: subject: Differential Geometry (math.DG)
subject: Algebraic Geometry (math.AG)
subject: Complex Variables (math.CV)
subject: FOS: Mathematics

description: An LCK (locally conformally Kahler) manifold is a Hermitian manifold which admits a Kahler cover with deck group acting by holomorphic homotheties with respect to the Kahler metric. The product of two LCK manifolds does not have a natural product LCK structure. It is conjectured that a product of two compact complex manifolds is never LCK. We classify all known examples of compact LCK manifolds onto three not exclusive classes: LCK with potential, a class of manifolds we call of Inoue type, and those containing a rational curve. In the present paper, we prove that a product of an LCK manifold and an LCK manifold belonging to one of these three classes does not admit an LCK structure.
description: 15 pages, version 2.0, final version, many small changes
Note on Self-Duality and the Kodama State
Creators: name: Corichi, Alejandro
name: Cortez, Jeronimo
Publisher: name: arXiv
Year: 2003
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: An interesting interplay between self-duality, the Kodama (Chern-Simons) state and knot invariants is shown to emerge in the quantum theory of an Abelian gauge theory. More precisely, when a self-dual representation of the CCR is chosen, the corresponding vacuum in the Schroedinger representation is precisely given by the Kodama state. Several consequences of this construction are explored.
description: 4 pages, no figures. References and discussion added. Final version to appear in PRD
Components Qualification for a Possible use in the Mu2e Calorimeter Waveform Digitizers
Creators: name: Di Falco, S.
name: Donati, S.
name: Morescalchi, L.
name: Pedreschi, E.
name: Pezzullo, G.
name: Spinella, F.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The Mu2e experiment at Fermilab searches for the charged flavor violating conversion of a muon into an electron in the Coulomb field of a nucleus. The detector consists of a straw tube tracker and a CSI crystal electromagnetic calorimeter, both housed in a superconducting solenoid. Both the front-end and the digital electronics, located inside the cryostat, will be operated in vacuum under a 1 T magnetic field, having to sustain the high flux of neutrons and ionizing particles coming from the muons stopping target. These harsh experimental conditions make the design of the calorimeter waveform digitizer quite challenging. All the selected commercial devices must be tested individually and qualified for radiation hardness and operation in high magnetic field. At the moment the expected particles flux and spectra at the digitizers location are not completely simulated and we are using initial rough estimates to select the components for the first prototype. We are gaining experience in the qualification procedures using the selected components but the choice will be frozen only when dose and neutron flux simulations will be completed. The experimental results of the first qualification campaign are presented.
description: TWEPP 2016 - Topical Workshop on Electronics for Particle Physics, 26-30 September 2016, Karlsruhe Institute of Technology (KIT)
From adhesive to brittle delamination in visco-elastodynamics
Creators: name: Rossi, Riccarda
name: Thomas, Marita
Publisher: name: Weierstrass Institute
Year: 2016
Subjects: subject: adhesive contact
subject: brittle delamination
subject: Kelvin-Voigt visco-elasticity
subject: inertia
subject: non-smooth brittle constraint
subject: coupled rate-dependent/rate-independent evolution
subject: energetic solutions
subject: 49J53
subject: 49J45
subject: 74H20
subject: 74C05
subject: 74C10
subject: 74M15
subject: 74R10

description: In this paper we analyze a system for brittle delamination between two visco-elastic bodies, also subject to inertia, which can be interpreted as a model for dynamic fracture. The rate-independent flow rule for the delamination parameter is coupled with the momentum balance for the displacement, including inertia. This model features a nonsmooth constraint ensuring the continuity of the displacements outside the crack set, which is marked by the support of the delamination parameter. A weak solvability concept, generalizing the notion of energetic solution for rate-independent systems to the present mixed rate-dependent/rate-independent frame, is proposed. Via refined variational convergence techniques, existence of solutions is proved by passing to the limit in approximating systems which regularize the nonsmooth constraint by conditions for adhesive contact. The presence of the inertial term requires the design of suitable recovery spaces small enough to provide compactness but large enough to recover the information on the crack set in the limit.
title: Corpus rassemblement de jeunes européens - Conférence sur l'eau
Creators: name: Corpus De LAngue Parlée En Interaction
name: Groupe ICOR
name: Niccolaï, Gerald
Publisher: name: COCOON - https://cocoon.huma-num.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2015
Subjects: subject: Français
subject: fra

description: Interactions didactiques
description: Présentation par les jeunes délégations européennes de l'enjeu sur l'eau aux élus d’une grande ville française.
description: Conforms to: doi:10.34847/cocoon.49aefa90-8c1f-3ba8-a099-0ebefc6a2aa7
description: Conforms to: Format CHAT
Projected Linear Response Theory for Charge-Exchange Excitations and Double Beta Decay
Creators: name: Krmpotić, F.
name: Mariano, A.
name: Kuo, T. T. S.
name: Nakayama, K.
Publisher: name: arXiv
Year: 1993
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The projected random phase approximation (PRPA) for charge-exchange excitations is derived from the time-dependent variational principle. Explicit results for the unperturbed energies (including the self-energy corrections), the PRPA matrices, and the transition matrix elements are presented. The effect of the projection procedure on the two-neutrino $ββ$ decay in $^{76}Ge$ is briefly discussed.
description: 12 pages text (LaTex) and 1 figure upon request, to be published in Phys. Lett. B
Programmable Heisenberg interactions between Floquet qubits
Creators: name: Nguyen, Long B.
name: Kim, Yosep
name: Hashim, Akel
name: Goss, Noah
name: Marinelli, Brian
name: Bhandari, Bibek
name: Das, Debmalya
name: Naik, Ravi K.
name: Kreikebaum, John Mark
name: Jordan, Andrew N.
name: Santiago, David I.
name: Siddiqi, Irfan
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: Superconductivity (cond-mat.supr-con)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: The fundamental trade-off between robustness and tunability is a central challenge in the pursuit of quantum simulation and fault-tolerant quantum computation. In particular, many emerging quantum architectures are designed to achieve high coherence at the expense of having fixed spectra and consequently limited types of controllable interactions. Here, by adiabatically transforming fixed-frequency superconducting circuits into modifiable Floquet qubits, we demonstrate an XXZ Heisenberg interaction with fully adjustable anisotropy. This interaction model is on one hand the basis for many-body quantum simulation of spin systems, and on the other hand the primitive for an expressive quantum gate set. To illustrate the robustness and versatility of our Floquet protocol, we tailor the Heisenberg Hamiltonian and implement two-qubit iSWAP, CZ, and SWAP gates with estimated fidelities of 99.32(3)%, 99.72(2)%, and 98.93(5)%, respectively. In addition, we implement a Heisenberg interaction between higher energy levels and employ it to construct a three-qubit CCZ gate with a fidelity of 96.18(5)%. Importantly, the protocol is applicable to various fixed-frequency high-coherence platforms, thereby unlocking a suite of essential interactions for high-performance quantum information processing. From a broader perspective, our work provides compelling avenues for future exploration of quantum electrodynamics and optimal control using the Floquet framework.
Supplementary document for Route to pure-quartic solitons in the mid-infrared - 7435465.pdf
Creators: name: Mei, Sen
name: Liu, Mulong
name: Huang, Huimin
name: He, Teng
name: Lu, Zhizhou
name: Zhao, Wei
Publisher: name: Optica Publishing Group
Year: 2025
Subjects: Uncategorized

description: dispersion effects and energy comparation
title: Corpus rassemblement de jeunes européens - Travaux des italiens
Creators: name: Corpus De LAngue Parlée En Interaction
name: Groupe ICOR
name: Niccolaï, Gerald
Publisher: name: COCOON - https://cocoon.huma-num.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2015
Subjects: subject: Français
subject: fra

description: Interactions didactiques
description: Présentation du projet de la délégation italienne sur la sensibilisation à la préservation de l'eau. Intervention faite en début de rencontre. Présentation par la responsable du groupe des italiens des travaux de réflexion menés auparavant par le groupe autour du thème de l'environnement.
description: Conforms to: doi:10.34847/cocoon.49aefa90-8c1f-3ba8-a099-0ebefc6a2aa7
description: Conforms to: Format CHAT
NLS1s and Sy1s: A comparison of ionized X-ray absorber properties
Creators: name: Orr, Astrid
Publisher: name: arXiv
Year: 2000
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The first results from a systematic study of warm absorbers in NLS1s using BeppoSAX public archive data are presented here. We confirm ASCA results showing that a warm absorber, as modeled by two oxygen K-shell absorption edges, is less frequent in NLS1s than in broad line (BL) Sy1s (about 20 per cent versus about 50 per cent). However, our study suggests that the ionization state of NLS1s is not lower than that of BLS1s, as opposed to the ASCA-based results. The soft excess temperatures of our sample, when fitted with blackbody emission models, lie within a small range of values (about 0.02-0.15 keV in the rest frame) with no marked dependence on source luminosity. This is in agreement with ASCA-based findings for NLS1s and early results from IUE-ROSAT BL Sy1 observations.
description: Contributed talk presented at the Joint MPE,AIP,ESO workshop on NLS1s, Bad Honnef, Dec. 1999, to appear in New Astronomy Reviews; also available at http://wave.xray.mpe.mpg.de/conferences/nls1-workshop
A Survey For Planetary-mass Brown Dwarfs in the Taurus and Perseus Star-forming Regions
Creators: name: Esplin, Taran
name: Luhman, Kevin
Publisher: name: arXiv
Year: 2017
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present the initial results from a survey for planetary-mass brown dwarfs in the Taurus star-forming region. We have identified brown dwarf candidates in Taurus using proper motions and photometry from several ground- and space-based facilities. Through spectroscopy of some of the more promising candidates, we have found 18 new members of Taurus. They have spectral types ranging from mid M to early L and they include the four faintest known members in extinction-corrected K_s, which should have masses as low as ~4-5 M_Jup according to evolutionary models. Two of the coolest new members (M9.25, M9.5) have mid-IR excesses that indicate the presence of disks. Two fainter objects with types of M9-L2 and M9-L3 also have red mid-IR colors relative to photospheres at <=L0, but since the photospheric colors are poorly defined at >L0, it is unclear whether they have excesses from disks. We also have obtained spectra of candidate members of the IC 348 and NGC 1333 clusters in Perseus that were identified by Luhman et al. (2016). Eight candidates are found to be probable members, three of which are among the faintest and least-massive known members of the clusters (~5 M_Jup).
description: 10 pages, 15 figures, 2 machine readable tables avaiable at www.dropbox.com/s/soa7nslxgry2n9i/tab1_tau.txt?dl=0 and www.dropbox.com/s/ibqerdy77mqhzuo/tab2_tau.txt?dl=0
Breathing mode of rapidly rotating Bose-Einstein condensates
Creators: name: Watanabe, Gentaro
Publisher: name: arXiv
Year: 2005
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We show that the breathing mode of a rapidly-rotating, harmonically-trapped Bose-Einstein condensate may be described by a generalized lowest Landau level (LLL) wave function, in which the oscillator length is treated as a variable. Using this wave function in a variational Lagrangian formalism, we show that the frequency of the breathing mode for a two-dimensional cloud is $2ω_{\perp}$, where $ω_{\perp}$ is the trap frequency. We also study large-amplitude oscillations and confirm that the above result is not limited to linear oscillations. The resulting mode frequency can be understood in terms of orbits of a single particle in a harmonic trap. The mode frequency is also calculated for a cloud in three dimensions and the result for the axial breathing mode frequency agrees with recent experimental data in the rapid rotation regime.
description: 10 pages, 3 figures. Extended discussion. see also cond-mat/0512317. Accepted for publication in Phys. Rev. A, one reference added
Dynamics of labyrinthine pattern formation in magnetic fluids : a mean-field theory
Creators: name: Otto, Felix
Publisher: name: Carnegie Mellon University
Year: 1996
Subjects: subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics

description: Abstract: "We are interested in the flow of a droplet of viscous ferrofluid in the Hele-Shaw cell under a transverse magnetic field. The (two-dimensional) phase configuration is observed to evolve into a labyrinthine pattern. We show that the conventional model for this flow has the form of a gradient flux w.r.t. an energy functional, which is the sum of magnetic and surface energy. In particular, we are interested in the behaviour of this flow problem in the regime of large magnetization M┬▓ >> 1. In this regime, the details of the pattern evolution are observed to be highly sensitive to changes in the initial configuration. This is reflected in the linear stability analysis of the circular phase configuration, a stationary point of the dynamics which is more and more unstable in the limit M┬▓ [up arrow] [infinity]. In order to capture the 'generic' behaviour of the dynamical system in this regime, we need a selection principle which dismisses those non-generic solutions. We propose a selection principle for the limit M┬▓ [up arrow] [infinity] which is based on the natural implicit discretization in time of our gradient flux formulation. We prove that this approach leads (in an appropriate scaling) to the equation [delta subscript t]s - [delta]s┬▓ = 0 for s(t,x) [element of] [0,1], the local spatial average of the phase configuration [subscript X](t,x) [element of] [0,1] ([subscript X])(t,x) = 1 if x [element of] R┬▓ lies in the two-dimensional cross-section of the fluid at time t, [subscript X](t,x) = 0 else). Thus this quantity, which contains information on the 'microstructured zone', evolves deterministically, although [subscript X] is essentially unpredictable."
Stratigraphic architecture and associated sedimentological and geochemical variability in the Upper Cretaceous Eagle Ford Group, south Texas
Creators: name: Alnahwi, Ahmed Wasel
Publisher: name: The University of Texas at Austin
Year: 2018
Subjects: subject: Eagle Ford
subject: Stratigraphy
subject: Sedimentology
subject: Geochemistry
subject: FOS: Earth and related environmental sciences
subject: XRF
subject: Machine learning
subject: Hyperspectral imaging

description: A detailed, rock-based investigation of three Upper Cretaceous Eagle Ford Group cores situated behind (L1), at (L2), and downdip (L3) of the Lower Cretaceous Stuart City paleoreef-shelf margin in south Texas was conducted to understand stratigraphic, sedimentological, and geochemical relationships. An understanding of stratigraphic, sedimentological, and geochemical variability across the ancestral shelf margin is currently lacking. The Cenomanian–Turonian Eagle Ford Group is composed predominantly of calcareous mudstones that were deposited below storm-wave base on the drowned South Texas Shelf. The Lower to Upper Eagle Ford contact approximates the Cenomanian–Turonian boundary, at which the OAE-2 occurred and was identified in all three cores. The low-relief raised rim of the paleoshelf margin may have acted as a barrier, dividing the Eagle Ford Group into two sedimentological systems: (1) a restricted drowned shelf to the north and (2) an open-marine basinal setting to the south. Pre-OAE-2 Eagle Ford strata on the drowned shelf are cyclic and enriched in molybdenum, suggesting anoxic to euxinic water masses. Anoxic basinward strata are less cyclical and have a lower molybdenum content. The cores were investigated to quantify mineralogical composition and TOC. Machine learning of XRF dataset was conducted using neural-network analysis to predict mineralogies and TOC. Quantitative laboratory-measured XRD mineralogies and TOC were used to conduct the training and develop high-resolution quantitative models. Derived mineralogic and organic matter quantitative models represent continuous relative abundances. This method allows for the utilization of the relatively inexpensive and nondestructive XRF analysis that requires minimal sample preparation to construct high-resolution mineral abundances and TOC content. Hyperspectral imagery was used to generate mineral maps of the L1 core. The used hyperspectral imaging system uses the SWIR (shortwave infrared) and LWIR (longwave infrared) spectrometers. The introduction of the LWIR made it possible to identify minerals that were not detected by previous SWIR systems such as quartz and feldspars. Hyperspectral imaging facilitates the study of textural and fabric relationships. The diagnostic cyclicity of the Lower Eagle Ford is closely related to calcite compositional variations and coccolithophore productivity. Strontium-rich calcite indicates smaller allochem size dominance as well as lower sedimentation rates.
Cartography of Triangulum-Andromeda using SDSS stars
Creators: name: Perottoni, H. D.
name: Rocha-Pinto, H. J.
name: Girardi, L.
name: Balbinot, E.
name: Santiago, B. X.
name: Majewski, S. R.
name: Anders, F.
name: Da Costa, L.
name: Maia, M. A. G.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The outer Galactic halo is home to a number of substructures which still have an uncertain origin, but most likely are remnants of former interactions between the Galaxy and its former satellites. Triangulum-Andromeda (TriAnd) is one of these halo substructures, found as an overdensity of 2MASS M giants. We analyzed the region of Triangulum-Andromeda using photometric data from the Ninth Data Release of Sloan Digital Sky Survey (SDSS DR9). By comparing the observations with simulations from the TRILEGAL Galactic model, we were able to identify and map several scattered overdensities of main sequence stars that seem to be associated with TriAnd over a large area covering $\sim 500$ deg$^2$. One of these excesses may represent a new stellar overdensity. We also briefly discuss an alternative hypothesis, according to which TriAnd is one of the troughs of oscillation rings in the Galactic disk.
description: 12 pages, 2 tables, 11 figures. Accepted for publication in MNRAS
Plasmon-magnon interactions in two-dimensional honeycomb magnets
Creators: name: Ghosh, Sayandip
name: Menichetti, Guido
name: Katsnelson, Mikhail I.
name: Polini, Marco
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Two-dimensional honeycomb ferromagnets offer the unprecedented opportunity to study interactions between collective modes that in standard bulk ferromagnets do not cross paths. Indeed, they harbor an optical spin-wave branch, i.e. a spin wave which disperses weakly near the Brillouin zone center. When doped with free carriers, they also host the typical gapless plasmonic mode of 2D itinerant electron/hole systems. When the plasmon branch meets the optical spin-wave branch, energy and momentum matching occurs, paving the way for interactions between the charge and spin sector. In this Letter we present a microscopic theory of such plasmon-magnon interactions, which is based on a double random phase approximation. We comment on the possibility to unveil this physics in recently isolated 2D honeycomb magnets such as ${\rm Cr}_2{\rm Ge}_2{\rm Te}_6$.
description: Main text: 7 pages; Supplemental Material: 10 pages
Non-Quasinormal Modes and Black Hole Physics
Creators: name: Birmingham, Danny
name: Carlip, S.
Publisher: name: arXiv
Year: 2003
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The near-horizon geometry of a large class of extremal and near-extremal black holes in string and M theory contains three-dimensional asymptotically anti-de Sitter space. Motivated by this structure, we are led naturally to a discrete set of complex frequencies defined in terms of the monodromy at the inner and outer horizons of the black hole. We show that the correspondence principle, whereby the real part of these ``non-quasinormal frequencies'' is identified with certain fundamental quanta, leads directly to the correct quantum behavior of the near-horizon Virasoro algebra, and thus the black hole entropy. Remarkably, for the rotating black hole in five dimensions we also reproduce the fractionization of conformal weights predicted in string theory.
description: 4 pages, revtex4; v2: reference added; v3: more references, minor typo corrected; v4: minor rewording to adjust size (ugh!); v5: some small clarifications at referees' suggestion
Geometry of heteroclinic cascades in scalar parabolic differential equations
Creators: name: Wolfrum, Matthias
Publisher: name: Weierstrass Institute
Year: 1998
Subjects: subject: Reaction-diffusion equations
subject: global attractor
subject: Morse-Smale systems
subject: heteroclinic orbits
subject: nodal properties
subject: meandric permutations
subject: 35K57
subject: 35B05
subject: 58F12
subject: 58F39

description: We investigate the geometrical properties of the attractor for semilinear scalar parabolic PDEs on a bounded interval with Neumann boundary conditions. Using the nodal properties of the stationary solutions which are determined by an ordinary boundary value problem, we obtain crucial information about the long-time behavior for the full PDE. Especially, we prove a criterion for the intersection of strong- stable and unstable manifolds in the finite dimensional Morse-Smale flow on the attractor.
Clays of St. John's vicinity, Arizona and New Mexico
Creators: name: Woodyard, Kenneth Eugene, 1929-
Publisher: name: The University of Texas at Austin
Year: 1956
Subjects: subject: Clay--Arizona--Apache County
subject: Clay--New Mexico--Catron County
subject: Clay--New Mexico--Valencia County

description: Clay minerals from the Triassic, Cretcaeous, and Quaternary Systems, studied by X-ray, microscopic, and differential-thermal methods, include kaolinite, montmorillonite, illite, chlorite, and interlayered mixture of these. There was continuous deposition of kaolinite throughout Triassic time and during part of the Cretaceous. Kaolinite reappeared in the Quaternary Richville Formation. Montmorillonite, indicative of previous volcanic activity, is the main clay-mineral constituent of the Triassic Chinle Formation. The transgressive-regressive character of the Cretaceous sediment is reflected by their clay-mineral content. The sources of the Richville Formation were the rocks that still crop out in the area
Evaluation of research activities of universities of Ukraine and Belarus: a set of bibliometric indicators and its implementation
Creators: name: Lazarev, Vladimir
name: Nazarovets, Serhii
name: Skalaban, Alexey
Publisher: name: arXiv
Year: 2017
Subjects: subject: Digital Libraries (cs.DL)
subject: FOS: Computer and information sciences

description: Monitoring bibliometric indicators of University rankings is considered as a subject of a University library activity. In order to fulfill comparative assessment of research activities of the universities of Ukraine and Belarus the authors introduced a set of bibliometric indicators. A comparative assessment of the research activities of corresponding universities was fulfilled; the data on the leading universities are presented. The sensitivity of the one of the indicators to rapid changes of the research activity of universities and the fact that the other one is normalized across the fields of science condition advantage of the proposed set over the one that was used in practice of the corresponding national rankings.
Certification of qubits in the prepare-and-measure scenario with large input alphabet and connections with the Grothendieck constant
Creators: name: Diviánszky, Péter
name: Márton, István
name: Bene, Erika
name: Vértesi, Tamás
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We address the problem of testing the quantumness of two-dimensional systems in the prepare-and-measure (PM) scenario, using a large number of preparations and a large number of measurement settings, with binary outcome measurements. In this scenario, we introduce constants, which we relate to the Grothendieck constant of order 3. We associate them with the white noise resistance of the prepared qubits and to the critical detection efficiency of the measurements performed. Large-scale numerical tools are used to bound the constants. This allows us to obtain new bounds on the minimum detection efficiency that a setup with 70 preparations and 70 measurement settings can tolerate.
description: 16 pages, 1 figure
In-medium relativistic kinetic theory and nucleon-meson systems
Creators: name: Morawetz, K.
name: Kremp, D.
Publisher: name: arXiv
Year: 1993
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Within the $σ-ω$ model of coupled nucleon-meson systems, a generalized relativistic Lenard--Balescu--equation is presented resulting from a relativistic random phase approximation (RRPA). This provides a systematic derivation of relativistic transport equations in the frame of nonequilibrium Green's function technique including medium effects as well as fluctuation effects. It contains all possible processes due to one meson exchange and special attention is kept to the off--shell character of the particles. As a new feature of many particle effects, processes are possible which can be interpreted as particle creation and annihilation due to in-medium one meson exchange. In-medium cross sections are obtained from the generalized derivation of collision integrals, which possess complete crossing symmetries.
description: 11pages
title: ADCO, Cinquième cartulaire de Saint-Étienne de Dijon (1664), Cart. 28 (G 132), 258 folios, f. 00408
Creators: name: de la Côte d'Or, Archives départementales
name: Archives Départementales De La Côte-D'Or
name: Petot, Frédérique
name: Projet CBMA
name: CG21/F.PETOT/2012
name: Petot, Frédéric
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2020
Subjects: subject: LaMOP
subject: Laboratoire de Médiévistique Occidentale de Paris
subject: Corpus Burgundiae Medii Aevi
subject: Chartes de la Bourgogne du Moyen Âge
subject: cartulaire

description: Cinquième cartulaire de Saint-Étienne de Dijon (1664), Archives départementales de la Côte-d'Or, Cart. 28 (G 132), 258 folios, f. 00408, Numérisation en mode image.
description: Relation: http://www.cbma-project.eu/
description: Bibliographic citation: Cinquième cartulaire de Saint-Étienne de Dijon (1664), Archives départementales de la Côte-d'Or, Cart. 28 (G 132), 258 folios, f. 00408, in Projet CBMA - Corpus Burgundiae Medii Aevi [Ressource en ligne], https://manuscrits.cbma-project.eu/
description: Provenance: abbaye Saint-Étienne de Dijon
description: Provenance: http://www.wikidata.org/entity/Q15945019
Anderson Accelerated Feasible Sequential Linear Programming
Creators: name: Kiessling, David
name: Pas, Pieter
name: Astudillo, Alejandro
name: Patrinos, Panagiotis
name: Swevers, Jan
Publisher: name: arXiv
Year: 2022
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics

description: This paper proposes an accelerated version of Feasible Sequential Linear Programming (FSLP): the AA($d$)-FSLP algorithm. FSLP preserves feasibility in all intermediate iterates by means of an iterative update strategy which is based on repeated evaluation of zero-order information. This technique was successfully applied to techniques such as Model Predictive Control and Moving Horizon Estimation, but it can exhibit slow convergence. Moreover, keeping all iterates feasible in FSLP entails a large number of additional constraint evaluations. In this paper, Anderson Acceleration (AA($d$)) is applied to the zero-order update strategy improving the convergence rate and therefore decreasing the number of constraint evaluations in the inner iterative procedure of the FSLP algorithm. AA($d$) achieves an improved contraction rate in the inner iterations, with proven local linear convergence. In addition, it is observed that due to the improved zero-order update strategy, AA($d$)-FSLP takes larger steps to find an optimal solution, yielding faster overall convergence. The performance of AA($d$)-FSLP is examined for a time-optimal point-to-point motion problem of a parallel SCARA robot. The reduction of the number of constraint evaluations and overall iterations compared to FSLP is successfully demonstrated.
description: Submitted to the IFAC World Congress 2023