cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Geology of Pinto Canyon area, Presidio County, Texas
Creators: name: Amsbury, David L.
Publisher: name: The University of Texas at Austin
Year: 1957
Subjects: subject: Geology--Texas--Presidio County
subject: Geology--Texas--Pinto Canyon Region

description: Pinto Canyon area includes the southern Tierra Vieja Mountains and the northern Chinati Mountains. Lower and middle Permian siltstone, limestone, and chert underlie Comanche limestone and sandstone; Gulf rocks were deposited in the area but were eroded from the crest of a north-trending Laramide anticline. Normal faults that trend N30E cut the anticline before burial by silicic middle Tertiary volcanic strata from several sources. Emplacement of silicic intrusions that range from 1-inch dikes to a 27-square-mile granite-syenite complex followed. Large-scale Basin-and-Range normal faults that trend N5W and N85E displaced the volcanic strata to form the Tierra Vieja, Cuesta del Burro, and Presidio bolson. Gravel, sand, and clay deposited in the bolson are being dissected by tributaries to the Rio Grande. In ascending order the lithostratigraphic sequence comprises the Wolfcamp(?) Alta formation and the Leonard and lower Guadalupe Pinto Canyon formation (new name), both in the Permian system; the Yucca formation, Bluff formation (lower Albian), Cox formation, Finlay formation, Bienevides formation (middle Albian; new name), Loma Plata limestone (upper Albian; new name), Del Rio formation, and Buda formation (Cenomanian?), all in the Comanche series of the Cretaceous system; and the Jeff conglomerate, Vieja formation (basal Oligocene), Shely group (Oligocene?; new name), Moonstone rhyolite (new name), Petan trachyte (new name), and Chinati Mountain group (emended), all in the Tertiary system. Six terrace gravels were mapped in the dissected Presidio bolson, plus alluvium in present arroyos and the Rio Grande floodplain.
Integral representation of martingales motivated by the problem of endogenous completeness in financial economics
Creators: name: Kramkov, Dmitry
name: Predoiu, Silviu
Publisher: name: Carnegie Mellon University
Year: 2012
Subjects: subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics

description: Let Q and P be equivalent probability measures and let ψ be a Jdimensional vector of random variables such that dQ dP and ψ are defined in terms of a weak solution X to a d-dimensional stochastic differential equation. Motivated by the problem of endogenous completeness in financial economics we present conditions which guarantee that every local martingale under Q is a stochastic integral with respect to the J-dimensional martingale St , E Q[ψ|Ft]. While the drift b = b(t, x) and the volatility σ = σ(t, x) coefficients for X need to have only minimal regularity properties with respect to x, they are assumed to be analytic functions with respect to t. We provide a counter-example showing that this t-analyticity assumption for σ cannot be removed
title: The merchant
title: Le marchand
titleType: AlternativeTitle
Creators: name: Mazaudon, Martine
name: Michailovsky, Boyd
Publisher: name: COCOON - https://cocoon.huma-num.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2011
Subjects: subject: Hayu
subject: vay

description: Conforms to: doi:10.34847/cocoon.49aefa90-8c1f-3ba8-a099-0ebefc6a2aa7
Hard-Attention Gates with Gradient Routing for Endoscopic Image Computing
Creators: name: Roffo, Giorgio
name: Biffi, Carlo
name: Salvagnini, Pietro
name: Cherubini, Andrea
Publisher: name: arXiv
Year: 2024
Subjects: subject: Image and Video Processing (eess.IV)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: To address overfitting and enhance model generalization in gastroenterological polyp size assessment, our study introduces Feature-Selection Gates (FSG) or Hard-Attention Gates (HAG) alongside Gradient Routing (GR) for dynamic feature selection. This technique aims to boost Convolutional Neural Networks (CNNs) and Vision Transformers (ViTs) by promoting sparse connectivity, thereby reducing overfitting and enhancing generalization. HAG achieves this through sparsification with learnable weights, serving as a regularization strategy. GR further refines this process by optimizing HAG parameters via dual forward passes, independently from the main model, to improve feature re-weighting. Our evaluation spanned multiple datasets, including CIFAR-100 for a broad impact assessment and specialized endoscopic datasets (REAL-Colon, Misawa, and SUN) focusing on polyp size estimation, covering over 200 polyps in more than 370,000 frames. The findings indicate that our HAG-enhanced networks substantially enhance performance in both binary and triclass classification tasks related to polyp sizing. Specifically, CNNs experienced an F1 Score improvement to 87.8% in binary classification, while in triclass classification, the ViT-T model reached an F1 Score of 76.5%, outperforming traditional CNNs and ViT-T models. To facilitate further research, we are releasing our codebase, which includes implementations for CNNs, multistream CNNs, ViT, and HAG-augmented variants. This resource aims to standardize the use of endoscopic datasets, providing public training-validation-testing splits for reliable and comparable research in gastroenterological polyp size estimation. The codebase is available at github.com/cosmoimd/feature-selection-gates.
description: Attention Gates, Hard-Attention Gates, Gradient Routing, Feature Selection Gates, Endoscopy, Medical Image Processing, Computer Vision
On the Analytic Structure of the Quark Self-Energy in Nambu-Jona- Lasinio Models
Creators: name: Domitrovich, P. P.
name: Müther, H.
Publisher: name: arXiv
Year: 1993
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The self-energy of quarks is investigated for various models which are inspired by the Nambu--Jona-Lasinio (NJL) model. Including, beyond the Hartree-Fock approximation, terms up to second-order in the quark interaction, the real and imaginary parts of scalar and vector components of the self-energy are discussed. The second-order contributions depend on the energy and momentum of the quark under consideration. This leads to solutions of the Dirac equation which are significantly different from those of a free quark or a quark with constant effective mass, as obtained in the Hartree-Fock approximation.
description: 15 pages LaTeX, 6 figures can be obtained from authors
Pulsar Science with the SKA
Creators: name: Keane, E. F.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: The Square Kilometre Array (SKA) will be sensitive enough to discover all of the pulsars in the Milky Way that are beamed towards Earth. Already in the initial deployment, SKA Phase 1, it will make significant advances in pulsar science. In these proceedings I briefly overview what the SKA is, and describe its pulsar search and timing capabilities.
description: 6 pages, 2 figures, 1 table, to appear in the proceedings of "IAUS 337: Pulsar Astrophysics - The Next 50 Years" eds: P. Weltevrede, B.B.P. Perera, L. Levin Preston & S. Sanidas
Practical seismic inversion
Creators: name: Simmons, James L.
Publisher: name: The University of Texas at Austin
Year: 1994
Subjects: subject: Seismic reflection method--Data processing

description: Seismic data contain information regarding the phase and amplitude of reflected events. Variations in amplitude, traveltime, and waveform as a function of offset are controlled by changes in the subsurface elastic properties. Analysis of prestack seismic data provides the opportunity to distinguish between changes in compressional-wave velocity, shear-wave velocity, and density, in the context of an isotropic, locally one-dimensional earth. A practical approach to prestack seismic inversion is developed and applied to a portion of a real data set. As a data preprocessing step, a predictive deconvolution algorithm is devised which incorporates the angle, time, and spatial dependence of the reverberation period into the deconvolution operator. An impedance model is obtained by use of a matched filter which represents the data as a superposition of simple-interface and thin-layer reflections. The inversion results are used to substantiate a modification to the statistically estimated seismic wavelet for a nonwhite reflectivity spectrum. One-dimensional velocity estimation is cast as a linear inverse problem. An initial velocity model, which is parameterized as a superposition of cubic B-splines, is adjusted to account for the residual moveout of selected events. The velocity analysis is fully automated. Residual moveout estimates are obtained implicitly without picking, and the resulting velocity function is guaranteed to be smooth. Primaries-only ray tracing, in which the linearized approximation to the Zoeppritz equations describes the reflection coefficients, serves as the forward modeling algorithm. The linear prestack inversion is based on the three-term linearized approximation to the Zoeppritz equations. This expression is reformulated so that one term incorporates the apriori relationships between the elastic properties and the other two represent perturbations from the apriori assumptions. Effects of thin layering, the seismic wavelet, and normal moveout stretch are incorporated into the Frechet derivatives. A single-iterate maximum-likelihood solution estimates the model parameter perturbations relative to the smooth starting model. Real data results illustrate the importance of a judicious selection of the data and model covariance matrices. Known hydrocarbon accumulations are detected as perturbations relative to the apriori assumptions.
title: Taro
title: Taro
titleType: AlternativeTitle
Creators: name: Mazaudon, Martine
name: Michailovsky, Boyd
Publisher: name: COCOON - https://cocoon.huma-num.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2011
Subjects: subject: Hayu
subject: vay

description: Conforms to: doi:10.34847/cocoon.49aefa90-8c1f-3ba8-a099-0ebefc6a2aa7
High-speed information processing based on optical microcombs and its performance optimization
Creators: name: Sun, Yang
Publisher: name: Swinburne
Year: 2025

description: In recent decades, photonic technologies offer a solution by enabling ultrahigh speeds for advanced information processing. Among them, microwave photonic signal processors provide high reconfigurability in achieving diverse processing functions. Optical microcombs show appealing advantages by providing numerous wavelength channels from a compact device. This thesis focuses on the realization and performance improvement of microwave photonic signal processors based on optical microcombs. The influence of theoretical and experimental factors is demonstrated and the performance between discrete and integrated systems is compared. This work guides the design of microwave photonic signal processors and opens avenues to new applications.
Instability theory of the Navier-Stokes-Poisson equations
Creators: name: Jang, Juhi
name: Tice, Ian
Publisher: name: Carnegie Mellon University
Year: 2011
Subjects: subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics

description: The stability question of the Lane–Emden stationary gaseous star configurations is an interesting problem arising in astrophysics. We establish both linear and nonlinear dynamical instability results for the Lane–Emden solutions in the framework of the Navier–Stokes–Poisson system with adiabatic exponent 6/5
The redshift space power spectrum in the halo model
Creators: name: White, Martin
Publisher: name: arXiv
Year: 2000
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Recently there has been a lot of attention focussed on a virialized halo-based approach to understanding the properties of the matter and galaxy power spectrum. We show that this model allows a natural treatment of the large and small scale redshift space distortions, which we develop here, which extends the pedagogical value of the approach.
description: 4 pages, 2 figures, submitted to MNRAS
Self-Consistent Relativistic Calculation of Nucleon Mean Free Path
Creators: name: Li, G. Q.
name: Machleidt, R.
name: Zhuo, Y. Z.
Publisher: name: arXiv
Year: 1993
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We present a fully self-consistent and relativistic calculation of the nucleon mean free path in nuclear matter and finite nuclei. Starting from the Bonn potential, the Dirac-Brueckner-Hartree-Fock results for nuclear matter are parametrized in terms of an effective $σ$-$ω$ Lagrangian suitable for the relativistic density-dependent Hartree-Fock (RDHF) approximation. The nucleon mean free path in nuclear matter is derived from this effective Lagrangian taking diagrams up to fourth-order into account. For the nucleon mean free path in finite nuclei, we make use of the density determined by the RDHF calculation in the local density approximation. Our microscopic results are in good agreement with the empirical data and predictions by Dirac phenomenology.
description: 16 pages RevTex and 6 figures (paper, available upon request from gqli@tamcomp.bitnet) UI-NTH-9310
Efficient and accurate log-Lévy approximations to Lévy driven LIBOR models
Creators: name: Papapantoleon, Antonis
name: Schoenmakers, John G. M.
name: Skovmand, David
Publisher: name: Weierstrass Institute
Year: 2011
Subjects: subject: LIBOR market model
subject: Levy processes
subject: drift term
subject: Picard approximation
subject: option pricing
subject: caps
subject: swaptions
subject: annuities
subject: 91G30
subject: 91G60
subject: 60G51

description: The LIBOR market model is very popular for pricing interest rate derivatives, but is known to have several pitfalls. In addition, if the model is driven by a jump process, then the complexity of the drift term is growing exponentially fast (as a function of the tenor length). In this work, we consider a Lévy-driven LIBOR model and aim at developing accurate and efficient log-Lévy approximations for the dynamics of the rates. The approximations are based on truncation of the drift term and Picard approximation of suitable processes. Numerical experiments for FRAs, caps and swaptions show that the approximations perform very well. In addition, we also consider the log-Lévy approximation of annuities, which offers good approximations for high volatility regimes.
Evolution of Molecular Clouds in the Superwind Galaxy NGC 1808 Probed by ALMA Observations
Creators: name: Salak, Dragan
name: Tomiyasu, Yuto
name: Nakai, Naomasa
name: Kuno, Nario
name: Miyamoto, Yusuke
name: Kaneko, Hiroyuki
Publisher: name: arXiv
Year: 2017
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: ALMA imaging of the cold molecular medium in the nearby starburst galaxy NGC 1808 is presented. The observations reveal the distribution of molecular gas, traced by $^{12}$CO (1-0) and $^{12}$CO (3-2), and continuum (93 and 350 GHz) across the central 1 kpc starburst region at high resolution of $\sim1$ arcsec. A molecular gas torus (radius $\sim30$ pc) is discovered in the circumnuclear disk (CND; central 100 pc), with a high CO (3-2)/CO (1-0) ratio of $\sim1$, surrounded by massive ($10^6$-$10^7$ $M_\odot$) clouds with high star formation efficiency (SFE$\sim10^{-8}$ yr$^{-1}$), molecular spiral arms, and a 500 pc pseudoring. The CND harbors a continuum core and molecular gas exhibiting peculiar motion. The new data confirm the line splitting along the minor galactic axis, interpreted as a nuclear gas outflow with average velocity $\sim180$ km s$^{-1}$, and show evidence of a velocity gradient of $\sim+0.4$ km s$^{-1}$ pc$^{-1}$ along the axis. In addition, supershells expanding from the 500 pc ring with maximum velocities of $\sim75$ km s$^{-1}$ are revealed. The distribution and CO luminosities of molecular clouds in the central 1 kpc starburst region indicate an evolutionary sequence, from gas accretion onto the 500 pc ring from the large-scale bar, to enhanced star formation in the ring, and outflow as feedback.
description: Accepted for publication in The Astrophysical Journal
The potential for springflow augmentation at Comal and San Marcos Springs, central Texas
Creators: name: Uliana, Matthew Martin
Publisher: name: The University of Texas at Austin
Year: 1995
Subjects: subject: Groundwater flow--Texas--Mathematical models
subject: Springs--Texas--Mathematical models
subject: Groundwater recharge--Texas--Mathematical models
subject: Edwards Aquifer (Tex.)

description: The Edwards aquifer, a regionally-extensive carbonate aquifer in Central Texas, is the sole source of water for nearly two million people, including the City of San Antonio. Pumpage from this aquifer is jeopardizing springflow from Comal Springs (in New Braunfels, Texas) and San Marcos Springs (in San Marcos, Texas), two of the largest springs in the state. These springs provide a habitat for a number of endangered species, and are an integral part of the local economies and the overall distribution of water in Central Texas. For these reasons it is important that flow from these springs be maintained, either through aquifer management plans that limit the withdrawal and usage of water from the aquifer, or through physical augmentation of the springs. In this thesis, the feasibility of maintaining springflow by augmenting discharge from the springs is investigated. Five potential methods of springflow augmentation (enhanced recharge, subsurface flow barriers, direct addition of water to the spring lakes, injection wells, and infiltration galleries) are presented and described. Based on present knowledge of the springs, the effectiveness of each method is evaluated, and the uncertainties associated with each are discussed. Computer models of the aquifer in the vicinity of the springs are constructed and used to model the effects of two of the augmentation methods (injection wells and infiltration galleries) on aquifer levels and spring discharges. The model results are used to estimate the efficiency of each of these methods and to develop general trends related to how the aquifer responds to the introduction of water through wells and infiltration galleries. Based on model results and the hydrogeology of each spring, an assessment of the each of the augmentation methods is presented, and recommendations are made as to the appropriateness of the various technologies at each spring.
On the classificarion of 3-dimensional spherical Sasakian manifolds
Creators: name: Sykes, Daniel
name: Schmalz, Gerd
name: Ezhov, Vladimir
Publisher: name: arXiv
Year: 2024
Subjects: subject: Differential Geometry (math.DG)
subject: Complex Variables (math.CV)
subject: FOS: Mathematics
subject: 32V05

description: In this article we consider spherical hypersurfaces in $\mathbb C^2$ with a fixed Reeb vector field as 3-dimensional Sasakian manifolds. We establish the correspondence between three different sets of parameters, namely, those arising from representing the Reeb vector field as an automorphism of the Heisenberg sphere, the parameters used in Stanton's description of rigid spheres, and the parameters arising from the rigid normal forms. We also geometrically describe the moduli space for rigid spheres, and provide geometric distinction between Stanton's hypersurfaces and those found by Ezhov and Schmalz. Finally, we determine the Sasakian automorphism groups of the rigid spheres and detect the homogeneous Sasakian manifolds among them.
title: Rich and poor
title: Riche et pauvre
titleType: AlternativeTitle
Creators: name: Mazaudon, Martine
name: Michailovsky, Boyd
Publisher: name: COCOON - https://cocoon.huma-num.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2011
Subjects: subject: Hayu
subject: vay

description: Conforms to: doi:10.34847/cocoon.49aefa90-8c1f-3ba8-a099-0ebefc6a2aa7
title: ADCO, Cartulaire général de Cîteaux, dit de Jean de Cirey, (XVe siècle), tome VIII, Cart. 192 (11 H 77), 295 folios, f. 0192v
Creators: name: de la Côte d'Or, Archives départementales
name: Petot, Frédéric
name: Archives Départementales De La Côte-D'Or
name: Petot, Frédérique
name: Projet CBMA
name: CG21/F.PETOT/2012
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: cartulaire
subject: Corpus Burgundiae Medii Aevi
subject: Chartes de la Bourgogne du Moyen Âge

description: Cartulaire général de Cîteaux, dit de Jean de Cirey, (XVe siècle), tome VIII, Archives départementales de la Côte-d'Or, Cart. 192 (11 H 77), 295 folios, f. 0192v, Numérisation en mode image.
description: Relation: http://www.cbma-project.eu/
description: Bibliographic citation: Cartulaire général de Cîteaux, dit de Jean de Cirey, (XVe siècle), tome VIII, Archives départementales de la Côte-d'Or, Cart. 192 (11 H 77), 295 folios, f. 0192v, in Projet CBMA - Corpus Burgundiae Medii Aevi [Ressource en ligne], https:// manuscrits.cbma-project.eu/
description: Provenance: abbaye de Cîteaux
description: Provenance: http://www.wikidata.org/entity/Q843261
description: Provenance: https://www.geonames.org/3024876
description: Provenance: http://www.idref.fr/030974844/id
description: Provenance: https://catalogue.bnf.fr/ark:/12148/cb12228351v
The trilobite fauna of the cameraspis zone in the basal Wilberns limestone of Texas
Creators: name: Wilson, James Lee, 1920-2008
Publisher: name: The University of Texas at Austin
Year: 1944
Subjects: subject: Paleontology--Texas--Llano Uplift
subject: Paleontology--Texas--Wilberns Formation
subject: Limestone--Texas--Wilberns Formation
subject: Trilobites--Texas--Llano Uplift
subject: Trilobites--Type specimens--Texas--Llano Uplift

description: This paper presents the results of a paleontologic study of the basal 50 feet of the Wilberns limestone and its contact with the underlying Cap Mountain limestone. Seven trips were made to the Central Mineral Region (Llano Uplift) of Texas between March and November of 1942. Collections were made at 11 localities selected at intervals to complete a circle around the area, the total number of stations in the final collection being 130. The specimens were prepared, numbered, identified, and photographed by the writer. The numerical system used is interpreted as follows: "42" represents the year in which the specimens were collected; "2w", the locality; ".1" the station at the locality, e.g. 42-2w.1. In listing the stations at which a certain species was found the 42- was dropped for the sake of brevity. All the type numbers refer to specimens in the collections of The University of Texas Department of Geology.
The interior angular momentum of core hydrogen burning stars from gravity-mode oscillations
Creators: name: Aerts, C.
name: Van Reeth, T.
name: Tkachenko, A.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: A major uncertainty in the theory of stellar evolution is the angular momentum distribution inside stars and its change during stellar life. We compose a sample of 67 stars in the core-hydrogen burning phase with a $\log\,g$ value from high-resolution spectroscopy, as well as an asteroseismic estimate of the near-core rotation rate derived from gravity-mode oscillations detected in space photometry. This assembly includes 8 B-type stars and 59 AF-type stars, covering a mass range from 1.4 to 5\,M$_\odot$, i.e., it concerns intermediate-mass stars born with a well-developed convective core. The sample covers projected surface rotation velocities $v\sin\,i \in[9,242]\,$km\,s$^{-1}$ and core rotation rates up to $26μ$Hz, which corresponds to 50\% of the critical rotation frequency. We find deviations from rigid rotation to be moderate in the single stars of this sample. We place the near-core rotation rates in an evolutionary context and find that the core rotation must drop drastically before or during the short phase between the end of the core-hydrogen burning and the onset of core-helium burning. We compute the spin parameter, which is the ratio of twice the rotation rate to the mode frequency (also known as the inverse Rossby number), for 1682 gravity modes and find the majority (95\%) to occur in the sub-inertial regime. The ten stars with Rossby modes have spin parameters between 14 and 30, while the gravito-inertial modes cover the range from 1 to 15.
description: Manuscript of 5 pages, including 2 figures, accepted for publication in The Astrophysical Journal Letters
Quasiconvexity equals rank-one convexity for isotropic sets of 2x2 matrices
Creators: name: Heinz, Sebastian
Publisher: name: Weierstrass Institute
Year: 2011
Subjects: subject: Quasiconvexity
subject: rank-one convexity
subject: lamination convexity
subject: isotropy
subject: 26B25
subject: 52A30

description: Let K be a given compact set of real 2x2 matrices that is isotropic, meaning invariant under the left and right action of the special orthogonal group. Then we show that the quasiconvex hull of K coincides with the rank-one convex hull (and even with the lamination convex hull of order 2). In particular, there is no difference between quasiconvexity and rank-one convexity for K. This is a generalization of a known result for connected sets.
A resource guide to physical science/physics software for the Apple II, Atari, Pet, and TRS-80
Creators: name: Lerma, Maria Inez, 1956-
Publisher: name: The University of Texas at Austin
Year: 1982
Subjects: subject: Physical sciences--Study and teaching (Secondary)--Computer programs
subject: Physics--Study and teaching (Secondary)--Computer programs
subject: Physical sciences--Study and teaching (Secondary)--Computer-assisted instruction
subject: Physics--Study and teaching (Secondary)--Computer-assisted instruction

description: The purpose of this resource guide is to present a list of the software available for high school physical science/physics for the four most popular microcomputers: Apple II, Pet, TRS-80, and Atari. The resource guide will consist of the following: 1. A list and description of the high school physical science/physics software available for AISD teachers in the various Resource Centers. 2. A list and description of the commercial software for high school physical science/physics. 3. Checklists for evaluating computer instructional programs. 4. An annotated bibliography of microcomputer publications.
Infinite homogeneous bipartite graphs with unequal sides
Creators: name: Goldstern, Martin
name: Grossberg, Rami
name: Kojman, Menachem
Publisher: name: Carnegie Mellon University
Year: 1992
Subjects: subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics

description: Abstract: "We call a bipartite graph homogeneous if every finite partial automorphism which respects left and right can be extended to a total automorphism. We classify all countable homogeneous bipartite graphs. A ([kappa], [lambda]) bipartite graph is a bipartite graph with left side of size [kappa] and right side of size [lambda]. We show that there is always a homogeneous (NΓéÇ,2[superscript n0]) bipartite graph (thus answering negatively a question by Kupitz and Perles), and that depending on the underlying set theory all homogeneous (NΓéÇ, NΓéü) bipartite graphs may be isomorphic, or there may be 2[superscript N┬╣] many isomorphism types of (NΓéÇ, NΓéü) homogeneous graphs."
Dynamics of the Galactic Bulge using Planetary Nebulae
Creators: name: Beaulieu, Sylvie F.
name: Freeman, Kenneth C.
name: Kalnajs, Agris J.
name: Saha, Prasenjit
name: Zhao, HongSheng
Publisher: name: arXiv
Year: 2000
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Evidence for a bar at the center of the Milky Way triggered a renewed enthusiasm for dynamical modelling of the Galactic bar-bulge. Our goal is to compare the kinematics of a sample of tracers, planetary nebulae, widely distributed over the bulge with the corresponding kinematics for a range of models of the inner Galaxy. Three of these models are N-body barred systems arising from the instabilities of a stellar disk (Sellwood, Fux and Kalnajs), and one is a Schwarzschild system constructed to represent the 3D distribution of the COBE/DIRBE near-IR light and then evolved as an N-body system for a few dynamical times (Zhao). For the comparison of our data with the models, we use a new technique developed by Saha (1998). The procedure finds the parameters of each model, i.e. the solar galactocentric distance R_o in model units, the orientation angle phi, the velocity scale (in km/s per model unit), and the solar tangential velocity which best fit the data.
description: 48 pages (Latex), 30 figures (PS), accepted for pub. in AJ
title: Ingratitude
title: L'ingratitude
titleType: AlternativeTitle
Creators: name: Mazaudon, Martine
name: Michailovsky, Boyd
Publisher: name: COCOON - https://cocoon.huma-num.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2011
Subjects: subject: Hayu
subject: vay

description: Conforms to: doi:10.34847/cocoon.49aefa90-8c1f-3ba8-a099-0ebefc6a2aa7
First-principles and model simulation of all-optical spin reversal
Creators: name: Zhang, G. P.
name: Babyak, Z.
name: Xue, Y.
name: Bai, Y. H.
name: George, Thomas F.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: All-optical spin switching is a potential trailblazer for information storage and communication at an unprecedented fast rate and free of magnetic fields. However, the current wisdom is largely based on semiempirical models of effective magnetic fields and heat pulses, so it is difficult to provide high-speed design protocols for actual devices. Here, we carry out a massively parallel first-principles and model calculation for thirteen spin systems and magnetic layers, free of any effective field, to establish a simpler and alternative paradigm of laser-induced ultrafast spin reversal and to point out a path to a full-integrated photospintronic device. It is the interplay of the optical selection rule and sublattice spin orderings that underlines seemingly irreconcilable helicity-dependent/independent switchings. Using realistic experimental parameters, we predict that strong ferrimagnets, in particular, Laves phase C15 rare-earth alloys, meet the telecommunication energy requirement of 10 fJ, thus allowing a cost-effective subpicosecond laser to switch spin in the GHz region.
description: 23 pages, 6 figures and one table
Structural geology of the Palestine Salt Dome, Anderson County, Texas
Creators: name: Hightower, Maxwell Lee, 1933-
Publisher: name: The University of Texas at Austin
Year: 1958
Subjects: subject: Palestine Salt Dome (Tex.)
subject: Salt domes--Texas--Anderson County
subject: Domes (Geology)--Texas--Anderson County

description: Palestine Salt Dome is a shallow, piercement-type salt dome. The minimum known depth to the salt core is 120 feet. Cropping out near the center of the uplifted area are recognizable Comanche and Gulf strata of the Cretaceous system. Around the periphery of the dome occur beds of Lower Tertiary system. These strata have been steeply inclined and broken by, at least, eight major radial, normal faults as a result of uplift by the central salt mass. This dome is expressed as a topographic low with a lake occupying the central depression. An annular drainage pattern encompasses the dome.
Dressed Feshbach molecules in the BEC-BCS crossover
Creators: name: Romans, M. W. J.
name: Stoof, H. T. C.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We present the RPA theory of the BEC-BCS crossover in an atomic Fermi gas near a Feshbach resonance that includes the relevant two-body atomic physics exactly. This allows us to determine the probability $Z$ for the dressed molecules in the Bose-Einstein condensate to be in the closed channel of the Feshbach resonance and to compare with the recent experiments of Partridge {\it et al.} [cond-mat/0505353] with $^{6}$Li. We determine for this extremely broad resonance also the condensate density of the dressed molecules throughout the BEC-BCS crossover.
description: 4 pages, 3 figures
Elastic scattering by unbounded rough surfaces
Creators: name: Elschner, Johannes
name: Hu, Guanghui
Publisher: name: Weierstrass Institute
Year: 2012
Subjects: subject: Elastic waves
subject: rough surfaces
subject: Navier equation
subject: variational formulation
subject: radiation condition
subject: 74J20
subject: 74B05
subject: 35J57
subject: 35Q74

description: We consider the two-dimensional time-harmonic elastic wave scattering problem for an unbounded rough surface, due to an inhomogeneous source term whose support lies within a finite distance above the surface. The rough surface is supposed to be the graph of a bounded and uniformly Lipschitz continuous function, on which the elastic displacement vanishes. We propose an upward propagating radiation condition (angular spectrum representation) for solutions of the Navier equation in the upper half-space above the rough surface, and establish an equivalent variational formulation. Existence and uniqueness of solutions at arbitrary frequency is proved by applying a priori estimates for the Navier equation and perturbation arguments for semi-Fredholm operators.
title: Two sisters (v.1)
title: Deux soeurs (v.1)
titleType: AlternativeTitle
Creators: name: Mazaudon, Martine
name: Michailovsky, Boyd
Publisher: name: COCOON - https://cocoon.huma-num.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2011
Subjects: subject: Hayu
subject: vay

description: Conforms to: doi:10.34847/cocoon.49aefa90-8c1f-3ba8-a099-0ebefc6a2aa7
Desert dunes of the Kermit Sandhills, Winkler County, Texas
Creators: name: Waitt, Mary Elizabeth Cooper, 1945-
Publisher: name: The University of Texas at Austin
Year: 1969
Subjects: subject: Kermit Sandhills (Tex.)
subject: Geology--Texas--Kermit Sandhills
subject: Sand dunes--Texas--Kermit Sandhills
subject: Sand dunes--Texas--Winkler County
subject: Sand dunes--Llano Estacado

description: The Kermit Sandhills dune field is one of a chain of dune fields that flank the southwestern escarpment of the Llano Estacado in West Texas. The dunes, derived from Plio-Pleistocene aeolian and lacustrine deposits, are subangular to subround polished quartz sands. They are light to moderate yellow brown, and both color and greasy polish are probably chemical in origin. The field consists of two sets of transverse dunes nearly at right angles to each other. A NS-trending, east-dipping set is constructed under strong winter westerlies, and an EW-trending, north-dipping, crescent-shaped set is constructed during summer southerlies; it is greatly modified by winter westerlies and northerly storm winds. Size analyses were made of 121 samples from 23 dunes. Samples were taken from deflation flats, windward and leeward slopes, and crests. T-tests were made to compare parameters of different environments. Mean size of the four environments ranges from 2.23ø to 2.31ø; mean sorting, from .30ø to .39ø; mean skewness from -.03 to +.03; and mean kurtosis from 1.00 to 1.08. Deflation flats are more poorly sorted, more leptokurtic, and more negatively skewed than dune sands. Lee slope samples tend to be finer grained and have lower kurtosis values than their corresponding windward flank samples. Grain size becomes finer toward the eastern edge of the field, kurtosis increases toward the east and west margins, sorting improves northward and worsens toward the margins, but skewness does not vary systematically across the field. Size and kurtosis variation across the field probably result from winter wind effects, sorting variations from the summer winds. With the data available from several other investigations, it does not yet seem possible to differentiate reliably between coastal and inland dunes on the basis of selected grain size parameters. Although size parameters of deflation flat and dune sands overlap when parameters are compared, the ranges for dunes are smaller than those of the flats. It is possible to differentiate between sub-environments when skewness is plotted against mean size, standard deviation, and kurtosis, and when mean size is plotted against standard deviation. The discrimination is often poor, with much overlap between environment fields. An inherent very good sorting and lack of fine grains prevents development of poor sorting or extreme positive skewness. The treadmill effect of migrating dunes mixes sand from all dune environments, thereby homogenizing parameter values, so the lack of distinct discrimination between environments is probably related as much to these inherited source sand parameters and to dune geomorphology as it is to wind effects.
The TensorFlow Partitioning and Scheduling Problem: It's the Critical Path!
Creators: name: Mayer, Ruben
name: Mayer, Christian
name: Laich, Larissa
Publisher: name: arXiv
Year: 2017
Subjects: subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: FOS: Computer and information sciences

description: State-of-the-art data flow systems such as TensorFlow impose iterative calculations on large graphs that need to be partitioned on heterogeneous devices such as CPUs, GPUs, and TPUs. However, partitioning can not be viewed in isolation. Each device has to select the next graph vertex to be executed, i.e., perform local scheduling decisions. Both problems, partitioning and scheduling, are NP-complete by themselves but have to be solved in combination in order to minimize overall execution time of an iteration. In this paper, we propose several heuristic strategies to solve the partitioning and scheduling problem in TensorFlow. We simulate the performance of the proposed strategies in heterogeneous environments with communication-intensive workloads that are common to TensorFlow. Our findings indicate that the best partitioning and scheduling heuristics are those that focus on minimizing the execution time of the critical path in the graph. Those strategies provide a speed-up of up to 4 times in comparison to strategies that are agnostic to the critical path, such as hash-based partitioning and FIFO scheduling.
description: 6 pages. To be published in Proceedings of DIDL '17: Workshop on Distributed Infrastructures for Deep Learning, hosted by ACM Middleware 2017 Conference. https://doi.org/10.1145/3154842.3154843
Some remarks on stability of generalized equations
Creators: name: Henrion, René
name: Kruger, Alexander
name: Outrata, Jiří
Publisher: name: Weierstrass Institute
Year: 2012
Subjects: subject: Parameterized generalized equation
subject: regular and limiting coderivative
subject: constant rank CQ
subject: mathematical program with equilibrium constraint
subject: 49J53
subject: 90C31
subject: 90C46

description: The paper concerns the computation of the graphical derivative and the regular (Fréchet) coderivative of the solution map to a class of generalized equations, where the multi-valued term amounts to the regular normal cone to a (possibly nonconvex) set given by $C^2$ inequalities. Instead of the Linear Independence qualification condition, standardly used in this context, one assumes a combination of the Mangasarian-Fromovitz and the Constant Rank qualification conditions. On the basis of the obtained generalized derivatives, new optimality conditions for a class of mathematical programs with equilibrium constrains are derived, and a workable characterization of the isolated calmness of the considered solution map is provided.
The GTC exoplanet transit spectroscopy survey VIII. Flat transmission spectrum for the warm gas giant WASP-80
Creators: name: Parviainen, Hannu
name: Palle, Enric
name: Chen, Guo
name: Nortmann, Lisa
name: Murgas, Felipe
name: Nowak, Grzegorz
name: Aigrain, Suzanne
name: Booth, Alice
name: Abazorius, Mantas
name: Iro, Nicolas
Publisher: name: arXiv
Year: 2017
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We set out to study the atmosphere of WASP-80b, a warm inflated gas giant with an equilibrium temperature of $\sim$800~K, using ground-based transmission spectroscopy covering the spectral range from 520~to~910~nm. The observations allow us to probe the existence and abundance of K and Na in WASP-80b's atmosphere, existence of high-altitude clouds, and Rayleigh-scattering in the blue end of the spectrum. We observed two spectroscopic time series of WASP-80b transits with the OSIRIS spectrograph installed in the Gran Telescopio CANARIAS, and use the observations to estimate the planet's transmission spectrum between 520~nm and 910~nm in 20~nm-wide passbands, and around the K~I and Na~I resonance doublets in 6~nm-wide passbands. We model three previously published broadband datasets consisting of 27 light curves jointly prior to the transmission spectroscopy analysis in order to obtain improved prior estimates for the planet's orbital parameters, average radius ratio, and stellar density. We recover a flat transmission spectrum with no evidence of Rayleigh scattering or K~I or Na~I absorption, and obtain an improved system characterisation as a by-product of the broadband- and GTC-dataset modelling. The transmission spectra estimated separately from the two observing runs are consistent with each other, as are the transmission spectra estimated using either a parametric or nonparametric systematics models. The flat transmission spectrum favours an atmosphere model with high-altitude clouds over cloud-free models with stellar or sub-stellar metallicities.
description: Accepted to A&A 6.9.2017
Stress, porosity, and pore pressure in fold-and-thrust belt systems
Creators: name: Gao, Baiyuan
Publisher: name: The University of Texas at Austin
Year: 2018
Subjects: Fold-and-thrust belts
Accretionary wedge
Stress
Porosity
Pore pressure

description: I use forward geomechanical modeling to study the mechanical and fluid flow behaviors in compressional regions such as fold-and-thrust belts and accretionary wedges. Under drained conditions, lateral tectonic loading increases the mean effective stress and deviatoric stress and drives the sediments to shear-failure as the sediment approaches the deformation front (or trench location). The shear-induced porosity-loss accounts for about one third of the total porosity-loss during tectonic loading under drained conditions. There are four characteristic stress regions in my model: far-field, transition, critical state wedge, and footwall. In the transition zone, the shear-stress ratio varies significantly and the stress state changes from uniaxial-strain compression state to critical state. Increasing the basal friction coefficient leads to a higher surface slope angle and more porosity loss in the footwall whereas increasing the sediment internal strength leads to a lower surface angle and more porosity loss in the hanging wall. Fluid flow has a great impact on stress and compression in fold-and-thrust belts. My models show that the hanging-wall overpressure is greater than the footwall near trench but lower than the footwall overpressure towards the inner wedge. The high hanging-wall overpressure near trench is cause by the rapid increase of total mean and deviatoric stress. A significant finding is that the high overpressure near trench reduces the vertical effective stress and causes the décollement to be weak near the frontal wedge. Low permeability and high convergence rate promote overpressure generation and enlarge the overpressure-weakened decollement region. This study has broad impacts on the earthquake studies, faults stability analysis, and topics associated fluid flow transport in compressional margins.
Sequence stratigraphy and geomodeling of the upper Pennsylvanian Canyon and Cisco Formations in SACROC Field, West Texas : insights into the Late Paleozoic glaciation
Creators: name: Alnazghah, Mahmoud Hasan
name: 0000-0002-9209-7676
Publisher: name: The University of Texas at Austin
Year: 2018
Subjects: SACROC
Horseshoe Atoll
Carbonate
Sequence stratigraphy
Late Paleozoic
Icehouse
Geomodeling

description: The Late Paleozoic has long been recognized as a time of extensive glaciation. Recent work has suggested that the Late Paleozoic represents greenhouse setting, with limited to no ice caps. The nature of the climate, greenhouse vs. icehouse, plays a major control on the observed stratigraphic architecture. Compared to the layered architecture of the greenhouse climate, where accommodation is filled to spill, the stratigraphic architecture of icehouse climate is dominated by complex geometries, discontinuous facies belts and frequent subaerial exposure surfaces and diastems. Such extreme heterogeneity represents a challenge in modeling subsurface reservoirs, which are inherently poorly sampled. A high resolution sequence stratigraphic framework was constructed for the Late Pennsylvanian units in the Scurry Area Canyon Reef Operators Committee (SACROC) Field using an extensive dataset including more than 7000 ft of core, 650 wireline logs, and 3D seismic volume. The stratigraphic framework was used to approximate water depths of lithofacies and subsequently used to construct a eustatic sea level curve for Late Pennsylvanian time. Several modeling methods were tested to investigate the best approach to represent complex icehouse carbonate systems in the subsurface. The sequence stratigraphic framework of the Late Pennsylvanian shows a transition from layered-cake stratigraphy during the deposition of the Missourian Canyon Formation into a wedding-cake architecture during the deposition of the Virgilian Cisco Formation. This transition and the refined eustatic curve are indicative of an increased icehouse conditions that peaked during the Virgilian. Periodicity was estimated from number of cycles and time to be 100 k.y. and 343 k.y. for the Missourian and Virgilian respectively, suggestive of short- and long-term eccentricity signal. Modeling results showed that pure stochastic methods failed to capture the complexity expected within icehouse carbonate platforms. On the other hand, multiple-point statistics algorithm, which is guided by conceptual models based on outcrop and modern analogs, generated the most geologically sound models. The refined eustatic curve for the Late Pennsylvanian is useful in improving and constraining paleoclimate, which can be employed in future climate simulations. The modeling efforts presented here are one of the few to capture the expected 3D heterogeneity of icehouse carbonate platforms, which is key for developing similar hydrocarbon reservoirs.
title: Hayu identity
title: L'identité hayu
titleType: AlternativeTitle
Creators: name: Mazaudon, Martine
name: Michailovsky, Boyd
Publisher: name: COCOON - https://cocoon.huma-num.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2011
Subjects: subject: Hayu
subject: vay

description: Conforms to: doi:10.34847/cocoon.49aefa90-8c1f-3ba8-a099-0ebefc6a2aa7