cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Ice-free lagoon sediment in areas of continuous Arctic permafrost revealed through electrical resistivity imaging
Creators: name: Pedrazas Hinojosa, Micaela Nicole
name: 0000-0002-6758-7518
Publisher: name: The University of Texas at Austin
Year: 2020
Subjects: Electrical geophysics
Hydrogeophysics
Hydrogeology
Carbon

description: The Arctic is undergoing profound changes due to amplification of global warming in northern latitudes. One of the key features in the Arctic that remains understudied is ice-bonded subsea permafrost. This coastal feature is assumed to be ice-rich and underlies the many coastal lagoons in the Arctic. Subsea permafrost, is estimated to store as much organic carbon as Earth’s atmosphere and protects Arctic coastlines from erosion. However, subsea frozen sediment near the shoreline has not been thoroughly mapped and how much thawed sediment exists beneath coastal lagoons remains unclear. The presence or absence of ice beneath the surface, and its thawing are vital information that potentially represent a positive carbon feedback to the global climate system. Through modeling and direct observations of electrical resistivity across a lagoon on the Alaska Beaufort Sea coast during the summer, we found that the subsurface is ice-free down to at least 17 m under the lagoon and down to 22 m at the beach. This finding contrasts with the broadly held idea of continuity of ice-rich permafrost across the land-sea interface extending from land to offshore in the near-surface. Since the subsurface beneath the beach and the lagoon are unfrozen to depths of at least ~ 20 m, there exists a significantly thawed portion of sediment beneath the lagoons, which may serve as a source and conduit for heat, water, and carbon exchange.
title: ADCO, Cartulaire général de Cîteaux, dit de Jean de Cirey, (XVe siècle), tome VI, Cart. 190 (11 H 75), 316 folios, f. 0163v
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
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2020
Subjects: subject: cartulaire
subject: Corpus Burgundiae Medii Aevi
subject: Chartes de la Bourgogne du Moyen Âge
subject: LaMOP
subject: Laboratoire de Médiévistique Occidentale de Paris

description: Cartulaire général de Cîteaux, dit de Jean de Cirey, (XVe siècle), tome VI, Archives départementales de la Côte-d'Or, Cart. 190 (11 H 75), 316 folios, f. 0163v, 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 VI, Archives départementales de la Côte-d'Or, Cart. 190 (11 H 75), 316 folios, f. 0163v, in Projet CBMA - Corpus Burgundiae Medii Aevi [Ressource en ligne], https:// manuscrits.cbma-project.eu/
description: Provenance: https://www.geonames.org/3024876
description: Provenance: http://www.idref.fr/030974844/id
description: Provenance: https://catalogue.bnf.fr/ark:/12148/cb12228351v
description: Provenance: abbaye de Cîteaux
description: Provenance: http://www.wikidata.org/entity/Q843261
Derivation of an effective damage model with evolving micro-structure
Creators: name: Hanke, Hauke
name: Knees, Dorothee
Publisher: name: Weierstrass Institute
Year: 2012
Subjects: subject: Two-scale convergence
subject: folding and unfolding operator
subject: rate-independent damage evolution
subject: Γ-convergence
subject: irreversibility
subject: broken Sobolev function
subject: 74A45
subject: 74C05
subject: 74R05
subject: 74Q15
subject: 76M50

description: In this paper rate-independent damage models for elastic materials are considered. The aim is the derivation of an effective damage model by investigating the limit process of damage models with evolving micro-defects. In all presented models the damage is modeled via a unidirectional change of the material tensor. With progressing time this tensor is only allowed to decrease in the sense of quadratic forms. The magnitude of the damage is given by comparing the actual material tensor with two reference configurations, denoting completely undamaged material and maximally damaged material (no complete damage). The starting point is a microscopic model, where the underlying micro-defects, describing the distribution of either undamaged material or maximally damaged material (but nothing in between), are of a given time-dependent shape but of different sizes. Scaling the microstructure of this microscopic model by a parameter ε>0 the limit passage ε→0 is preformed via two-scale convergence techniques. Therefore, a regularization approach for piecewise constant functions is introduced to guaranty enough regularity for identifying the limit model. In the limit model the material tensor depends on a damage variable z:[0,T]→ W1,p(Ω) taking values between 0 and 1 such that, in contrast to the microscopic model, some kind of intermediate damage for a material point x∈Ω is possible. Moreover, this damage variable is connected to the material tensor via an explicit formula, namely, a unit cell formula known from classical homogenization results.
Using tree damage to characterize the evolution of dynamic pressure within the 18 May 1980 pyroclastic density current of Mount St. Helens
Creators: name: Guinn, Nicole Kristen
name: 0000-0002-8728-5859
Publisher: name: The University of Texas at Austin
Year: 2020
Subjects: Pyroclastic density current
Mount St. Helens
Volcano
Dynamic pressure
Trees
Damage

description: On 18 May 1980, Mount St. Helens erupted a laterally directed pyroclastic density current (PDC) that decimated ~600km2 of forest, referred to as the blowdown zone. The head of the current contained the peak dynamic pressure, which uprooted or broke off many trees and stripped them of vegetation. The four main objectives in analyzing post-eruption aerial photos were to locate standing trees, calculate tree heights, calculate tree density, and calculate tree height from downed trees as a function of distance from the volcano. Clusters of 10 or more closely spaced trees were left standing throughout the blowdown zone. Clusters were categorized into stripped and foliage clusters based on their shadow shape. Stripped clusters are impacted by higher dynamic pressures than foliage clusters because trees were stripped of vegetation. Because stripped clusters are located closer to the volcano, the PDC is relatively denser, therefore has higher dynamic pressure. The increasing number of stripped, isolated trees with distances indicates that dynamic pressure was declining. Values of dynamic pressure can be estimated using tree height and radius, the maximum stress at the height of tree failure, and the drag coefficient of the PDC. Two different datasets of dynamic pressure were derived, that constrain the minimum and maximum dynamic pressures of the PDC. The dynamic pressures estimated from toppled trees tended to yield lower values than those estimated from standing trees. Standing tree clusters were affected by dynamic pressures that were on average 12 kPa lower than the dynamic pressures that impacted isolated, standing trees. The dynamic pressure of isolated, standing trees decreased from 35 kPa in the last 30% of the distance traveled by the PDC to around 15 kPa near the edge of the blowdown zone. Tree damage can provide insights into internal dynamic pressure changes of PDCs.
Topological phase transitions of semimetal states in effective field theory models
Creators: name: Ji, Xuanting
name: Sun, Ya-Wen
Publisher: name: arXiv
Year: 2023
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Effective relativistic field theory models capable of realizing various gapless topological states are presented in this work. We study the topological phase transitions of the Weyl and nodal line semimetal states in effective field theories. When the one form field giving rise to the Weyl nodes lie perpendicular to the plane where the nodal ring lives, the nodal ring and Weyl nodes could coexist as the mirror symmetry responsible for the nodal ring is not broken. New phases including a three-node state and a triple degenerate state exist. The nodal ring is immediately destroyed when the one form field lies in the plane of the ring. However, we show that in an eight-component spinor model, Weyl nodes and nodal rings could still coexist even when the one form field is parallel to the plane, due to the expanded symmetry. Topological invariants are calculated which confirm the interesting nontrivial topology of the three-node state and the triple-degenerate node. This work presents potential topological phase transitions in multiphase topological systems, which may be experimentally detected.
description: 40 pages,15 figures, comments added, typos corrected. Final version to appear in EPJP
Optical, UV, and X-ray Clues to the Nature of Narrow Line AGNs
Creators: name: Laor, Ari
Publisher: name: arXiv
Year: 2000
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: AGNs with narrow Balmer lines show various extreme properties. In particular, rapid X-ray variability, steep X-ray spectra, peculiar optical and UV line ratios, and possibly peculiar line profiles. Since all these phenomena occur together they are likely to be related to one specific underlying physical parameter. I review recent evidence, based on HST imaging of low z quasars, which suggests that the H-beta line width and continuum luminosity of quasars provide a reasonably accurate estimate of the black hole mass. This implies that narrow-line AGN have relatively low black hole masses, and thus high L/L_Edd, as independently suggested based on their steep X-ray spectra. I present additional evidence suggesting that the X-ray variability and the radio loudness are primarily driven by the black hole mass. The high mass inflow rate into the core of narrow-line AGNs may produce a denser and more enriched BLR, a high column radiation pressure driven outflow, and a smaller illumination angle for the NLR, as suggested by the observed emission line properties. Narrow-line AGNs may thus provide important clues for understanding the rich overall phenomenology of AGNs.
description: Invited 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
Dynamic solid-solid transitions with phase characterized by an order parameter
Creators: name: Fried, Eliot
name: Gurtin, Morton E.
Publisher: name: Carnegie Mellon University
Year: 1993
Subjects: subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics

description: Abstract: "We develop a thermodynamically consistent continuum theory for the study of solid-solid phase transitions where deformation dominates heat and mass transfer. We use an order parameter to characterize the notion of phase and identify phase interfaces with thin transition zones within which the strain and order parameter exhibit large gradients. To model the growth of one phase at the expense of another we introduce configurational forces, subject to their own balance, that work against changes in the order parameter. By studying traveling waves and the asymptotics of a transition layer, we establish connections between our theory and more standard approaches that identify phase interfaces with surfaces of strain discontinuity."
Exact U(N_c)-> U(N_1)xU(N_2) factorization of Seiberg-Witten curves and N=1 vacua
Creators: name: Janik, Romuald A.
Publisher: name: arXiv
Year: 2003
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Mathematical Physics (math-ph)
subject: Algebraic Geometry (math.AG)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: N=2 gauge theories broken down to N=1 by a tree level superpotential are necessarily at the points in the moduli space where the Seiberg-Witten curve factorizes. We find exact solution to the factorization problem of Seiberg-Witten curves associated with the breaking of the U(N_c) gauge group down to two factors U(N_1)xU(N_2). The result is a function of three discrete parameters and two continuous ones. We find discrete identifications between various sets of parameters and comment on their relation to the global structure of N=1 vacua and their various possible dual descriptions. In an appendix we show directly that integrality of periods leads to factorization.
description: 20 pages, 1 figure; v2: reference added
title: 02_0699
Creators: name: Wesley Baldwin, John
name: Baldwin, John W.
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2018
Subjects: subject: LaMOP
subject: Laboratoire de Médiévistique Occidentale de Paris

description: L'ensemble de ces notes ont été crée par John Baldwin lors d'une de ses premières périodes de résidence à Paris. Ces documents comprennent tous les magistri qu’il avait pu rencontrer dans ses sources. Aux XIIème et XIIIème siècles, les universités n'existant pas encore, le titre de magister s'il évoque certainement une compétence n'est pas rattaché de façon systématique au passage par les écoles. De surcroît, les magistris sont le plus souvent désignés par leur seul prénom. La lecture de ces données est donc difficile et suppose un long travail pour tenter d'identifier un individu auquel on pourrait rattacher plusieurs mentions. John Baldwin avait donc renoncé à utiliser ces données pour donner un prolongement à sa magnifique étude sur les gradués d'université et leur emploi par les Capétiens et les Plantagenêts. Néanmoins, il a conservé ces données et elles sont potentiellement très utile dans le cadre de Studium, comme le sont toutes les mentions dans les volumes des Fasti Ecclesiae Gallicanae de chanoines portant ce titre de magister sans autres précisions. L'ampleur des dépouillements rend ces données très utiles et nous devons une grande reconnaissance à John Baldwin pour avoir pris la peine de faire photocopier ses fiches et de nous les avoir transmises amicalement.
Les données ainsi que les images des fiches sont accessibles sur le site Internet à l'adresse suivante : http://studium-baldwin.lamop.fr/.
Les transcriptions des fiches ont été effectuées par des étudiants de Paris 1 Panthéon - Sorbonne mais elles n'ont pas été corrigées par la suite.
description: Relation: https://lamop.hypotheses.org/
Tunable subnanometer gap plasmonic metasurfaces
Creators: name: Doyle, Dennis
name: Charipar, Nicholas
name: Argyropoulos, Christos
name: Trammell, Scott A.
name: Nita, Rafaela
name: Naciri, Jawad
name: Pique, Alberto
name: Herzog, Joseph B.
name: Fontana, Jake
Publisher: name: arXiv
Year: 2017
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: The index of refraction governs the flow of light through materials. At visible and near infrared wavelengths the real part of the refractive index is limited to less than 3 for naturally occurring transparent materials, fundamentally restricting applications. Here, we carried out experiments to study the upper limit of the effective refractive index of self-assembled metasurfaces at visible and near-infrared wavelengths. The centimeter-scale metasurfaces were made of a hexagonally close packed (hcp) monolayer of gold nanospheres coated with tunable alkanethiol ligand shells, controlling the interparticle gap from 2.8 to 0.45 nm. In contrast to isolated dimer studies, the macro-scale areas allow for billions of gaps to be simultaneously probed and the hcp symmetry leads to large wavelength shifts in the resonance mode, enabling subnanometer length scale mechanisms to be reproducibly measured in the far-field. We demonstrate for subnanometer gaps, that the optical response of the metasurfaces agrees well with a classical (local) model, with minor nonlocal effects and no clear evidence of ligand-mediated charge transfer at optical frequencies. We determine the effective real part of the refractive index for the metasurfaces has a minimum of 1.0 for green-yellow colors, then quickly reaches a maximum of 5.0 in the reds and remains larger than 3.5 far into the near infrared. We further show changing the terminal group and conjugation of the ligands in the metasurfaces has little effect on the optical properties. These results establish a pragmatic upper bound on the confinement of visible and near infrared light, potentially leading to unique dispersion engineered coatings
Areal geology of Candelaria area Presidio County, Trans-Pecos Texas
Creators: name: Smith, Joseph Thurston, 1927-
Publisher: name: The University of Texas at Austin
Year: 1956
Subjects: subject: Geology--Texas--Presidio County

description: The extreme northwestern part of the Candelaria area belongs to the Mexican Highland province; its structure is the result of Laramide orogeny. The rest, consisting of northward trending fault blocks and intervening basins where waste from the fault block accumulates, is characteristic of the Basin and Range province. The Candelaria area stood above the sea in early Cambrian time, probably during late Pennsylvanian-early Permian time, and in post Permian pre-late-Jurassic time when it was a part of the Wichita pale oplain, and it has been emergent since Laramide time. Oil may be trapped at the subsurface unconformities. In early Tertiary time, the area was covered by volcanic material, and in later Tertiary time, epieroganic uplift and normal faulting formed the Basin and Range structure of the present-day surface
Productive public investment in agriculture for economic recovery with rural well-being: an analysis of prospective scenarios for Uganda
Creators: name: Sánchez, Marco V.
name: Cicowiez, Martín
name: Pereira Fontes, Francisco
name: Sánchez, Marco V.
name: Cicowiez, Martín
name: Pereira Fontes, Francisco
Publisher: name: Unknown
Year: 2022
Subjects: subject: Agricultural and Food Policy
subject: Food Security and Poverty
subject: Public Economics
subject: Uganda
subject: agrifood sector
subject: public investment
subject: impact assessment
subject: rural poverty
subject: simulation models
subject: comparative analysis

description: This study highlights how, through a series of scenarios, public investments promoting agricultural productivity in Uganda could drive growth in agrifood production, with favourable impacts on the economy, on well-being and on poverty, especially in rural areas. Using a modelling tool to represent the Ugandan economy, with its multiple sectors and current fiscal constraints, the study ranked the subsectors of Uganda’s agriculture that, through the productivity impact of public investments representing 0.25 percent of GDP (on average, about 373 billion 2017 Uganda shillings) during the years 2023–2025, will generate the greatest socio-economic benefits, maximizing the cost-effectiveness of the public investments. Generally, economic growth and the welfare of households, as measured by their consumption, will be positively impacted, but the impacts will ultimately depend on the sector that receives the investment, which is shown in a ranking. The agricultural sectors targeted for government investment will increase their output (and food prices will thus fall), and this will stimulate growth in non-agricultural sectors, both by increasing final demand for non-agricultural products and by lowering input prices and fostering upstream processing. Lower food prices will have a significant impact since food represents a relatively large proportion of the consumption basket of poorest households. Furthermore, labour income for rural households will increase with productivity growth, and this will reduce rural poverty. The findings of this study provide important information about the priorities of Uganda’s National Development Plan (NDP) III and vision for agriculture, as well as new priorities to be considered for enabling economic recovery with increased well-being post-COVID-19.
description: FAO Document Repository: https://doi.org/10.4060/cb8730en
Pressure-induced phase transition and bi-polaronic sliding in a hole-doped Cu_2O_3 ladder system
Creators: name: Kaneshita, E.
name: Martin, I.
name: Bishop, A. R.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study a hole-doped two-leg ladder system including metal ions, oxygen, and electron-lattice interaction, as a model for Sr_{14-x}Ca_xCu_{24}O_{41-δ}. Single- and bi-polaronic states at 1/4-hole doping are modeled as functions of pressure by applying an unrestricted Hartree-Fock approximation to a multiband Peierls-Hubbard Hamiltonian. We find evidence for a pressure-induced phase transition between single-polaron and bi-polaron states. The electronic and phononic excitations in those states, including distinctive local lattice vibrational modes, are calculated by means of a direct-space Random Phase approximation. Finally, as a function of pressure, we identify a transition between site- and bond-centered bi-polarons, accompanied by a soft mode and a low-energy charge-sliding mode. We suggest comparisons with available experimented data.
Conditional deep generative models as surrogates for spatial field solution reconstruction with quantified uncertainty in Structural Health Monitoring applications
Creators: name: Silionis, Nicholas E.
name: Liangou, Theodora
name: Anyfantis, Konstantinos N.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Machine Learning (cs.LG)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: In recent years, increasingly complex computational models are being built to describe physical systems which has led to increased use of surrogate models to reduce computational cost. In problems related to Structural Health Monitoring (SHM), models capable of both handling high-dimensional data and quantifying uncertainty are required. In this work, our goal is to propose a conditional deep generative model as a surrogate aimed at such applications and high-dimensional stochastic structural simulations in general. To that end, a conditional variational autoencoder (CVAE) utilizing convolutional neural networks (CNNs) is employed to obtain reconstructions of spatially ordered structural response quantities for structural elements that are subjected to stochastic loading. Two numerical examples, inspired by potential SHM applications, are utilized to demonstrate the performance of the surrogate. The model is able to achieve high reconstruction accuracy compared to the reference Finite Element (FE) solutions, while at the same time successfully encoding the load uncertainty.
description: 28 pages, 14 figures. Submitted to Elsevier Journal for publication
E2 properties of nuclei far from stability and the proton-halo problem of 8B
Creators: name: Nakada, Hitoshi
name: Otsuka, Takaharu
Publisher: name: arXiv
Year: 1993
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: E2 properties of A=6--10 nuclei, including those of nuclei far from stability, are studied by a $(0+2)\hbarω$ shell-model calculation which includes E2 core-polarization effects explicitly. The quadrupole moments and the E2 transition strengths in A=6--10 nuclei are described quite well by the present calculation. This result indicates that the relatively large value of the quadrupole moment of $^8$B can be understood without introducing the proton-halo in $^8$B. An interesting effect of the $2\hbarω$ core-polarization is found for effective charges used in the $0\hbarω$ shell model; although isoscalar effective-charges are almost constant as a function of nucleus, appreciable variations are needed for isovector effective-charges which play important roles in nuclei with high isospin-values.
description: (LaTeX, 23 pages)
A generalization of Lagrange's algebraic identity and connections with Jensen's inequality
Creators: name: Niculescu, Constantin P.
name: Stephan, Holger
Publisher: name: Weierstrass Institute
Year: 2012
Subjects: subject: Jensen's inequality
subject: Lagrange's algebraic identity
subject: convex function
subject: slope function
subject: barycenter of a measure
subject: 26B25
subject: 26D15

description: We discuss a generalization of Lagrange's algebraic identity that provides valuable insights into the nature of Jensen's inequality and of many other inequalities of convexity.
Dynamic concentration of the triangle-free process
Creators: name: Bohman, Tom
name: Keevash, Peter
Publisher: name: Carnegie Mellon University
Year: 2013
Subjects: subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics

description: The triangle-free process begins with an empty graph on n vertices and iteratively adds edges chosen uniformly at random subject to the constraint that no triangle is formed. We determine the asymptotic number of edges in the maximal triangle-free graph at which the triangle-free process terminates. We also bound the independence number of this graph, which gives an improved lower bound on Ramsey numbers: we show R(3,t) > (1/4 − o(1))t 2/ log t, which is within a 4 + o(1) factor of the best known upper bound. Furthermore, we determine which bounded size subgraphs are likely to appear in the maximal triangle-free graph produced by the triangle-free process: they are precisely those triangle-free graphs with maximal average density at most 2.
New evidence of regressing and transgressing Jurassic siliciclastic coastlines : Dhruma Formation, northern central Arabia
Creators: name: Alhussaini, Abdulkarim M.
name: 0000-0003-2730-4672
Publisher: name: The University of Texas at Austin
Year: 2018
Subjects: Dhruma Formation
Middle Jurassic
Mixed siliciclastic and carbonate
Sequence stratigraphy
Mesozoic reservoirs
Saudi Arabia

description: The Middle Jurassic Dhruma carbonates are long known as a major hydrocarbon reservoir with massive proven reserves in Saudi Arabia and other Arabian-Gulf countries. Regional studies indicate that these hydrocarbon-rich carbonates are replaced laterally by siliciclastic deposits in northern and southern central Arabia. However, none of those studies provided knowledge on how these siliciclastic deposits were formed or can be correlated with their carbonate counterparts. Recently drilled shallow stratigraphic wells on and near the outcrops of the Dhruma Formation (about 250 km NW of Riyadh) provide an extraordinary opportunity to analyze the sedimentological and stratigraphic characteristics of these siliciclastic sediments. Around 1500 meters of cores from six shallow stratigraphic wells are described, providing an understanding of the transgressive and regressive siliciclastic Dhruma shorelines, and how these fit with their better-known carbonate counterparts. Thirteen facies associations were identified from the analyzed Dhruma cores, and they were classified into transgressive and regressive (or both) associations. In addition, five transgressive-regressive sequences were identified, each with an estimated age duration of 1.2-1.6 My, and an average thickness of 32- 78 meters. This study is the first to document the sedimentology and stratigraphy of the Dhruma siliciclastic succession in northern central Arabia, and highlights a complex mixed system of deltaic, estuarine and shelf-ridge deposits that interfinger with carbonate deposits. Also, it contributes to the reconstruction of the existing Middle Jurassic paleogeographic map in Saudi Arabia, and to a correlation with the recently discovered age-equivalent siliciclastic reservoir in the Rub Al-Khali basin.
FOS Observations of Four NLS1s
Creators: name: Goodrich, Robert W.
Publisher: name: arXiv
Year: 2000
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Ultraviolet through optical spectroscopy of four NLS1s shows strong absorption features in the high-ionization UV resonance lines such as C IV, N V, and Si IV. Mg II is not absorbed. The absorption could originate in the warm absorber.
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
Additional file 1 of Ethnic inequalities in palliative care prescribing in high income countries – a rapid systematic review
Creators: name: Kunonga, Tafadzwa Patience
name: Johnson, Eugenie Evelynne
name: Din, Usvah
name: Westhead, Elizabeth
name: Dewhurst, Felicity
name: Hanratty, Barbara
Publisher: name: figshare
Year: 2025
Subjects: Medicine
Biotechnology
Biological Sciences not elsewhere classified
Cancer
Science Policy

description: Supplementary Material 1.
Statistical Skorohod embedding problem and its generalizations
Creators: name: Belomestny, Denis
name: Schoenmakers, John G. M.
Publisher: name: Weierstrass Institute
Year: 2014
Subjects: subject: Skorohod embedding problem
subject: Levy process
subject: Mellin transform
subject: Laplace transform
subject: variance mixture models
subject: time-changed Levy processes
subject: 62F10
subject: 62J12

description: Given a Levy process L, we consider the so-called statistical Skorohod embedding problem of recovering the distribution of an independent random time T based on i.i.d. sample from L(T). Our approach is based on the genuine use of the Mellin and Laplace transforms. We propose consistent estimators for the density of T, derive their convergence rates and prove their optimality. It turns out that the convergence rates heavily depend on the decay of the Mellin transform of T. We also consider the application of our results to the problem of statistical inference for variance-mean mixture models and for time-changed Levy processes.
A discontinuous skeletal method for the viscosity-dependent Stokes problem
Creators: name: Ern, Alexandre
name: Di Pietro, Daniele
name: Linke, Alexander
name: Schieweck, Friedhelm
Publisher: name: Weierstrass Institute
Year: 2015
Subjects: subject: Stokes problem
subject: mixed methods
subject: curl-free forces
subject: higher-order reconstruction
subject: superconvergence
subject: hybrid discontinuous Galerkin method
subject: static condensation
subject: 65N12
subject: 65N30
subject: 76D07
subject: 47.11.Fg

description: We devise and analyze arbitrary-order nonconforming methods for the discretization of the viscosity-dependent Stokes equations on simplicial meshes. We keep track explicitly of the viscosity and aim at pressure-robust schemes that can deal with the practically relevant case of body forces with large curl-free part in a way that the discrete velocity error is not spoiled by large pressures. The method is inspired from the recent Hybrid High-Order (HHO) methods for linear elasticity. After elimination of the auxiliary variables by static condensation, the linear system to be solved involves only discrete face-based velocities, which are polynomials of degree k >=0, and cell-wise constant pressures. Our main result is a pressure-independent energy-error estimate on the velocity of order (k+1). The main ingredient to achieve pressure-independence is the use of a divergence-preserving velocity reconstruction operator in the discretization of the body forces. We also prove an L2-pressure estimate of order (k+1) and an L2-velocity estimate of order (k+2), the latter under elliptic regularity. The local mass and momentum conservation properties of the discretization are also established. Finally, two- and three-dimensional numerical results are presented to support the analysis.
Radial Velocity Measurements of an Orbiting Star Around Sgr A*
Creators: name: Nishiyama, Shogo
name: Saida, Hiromi
name: Takamori, Yohsuke
name: Takahashi, Masaaki
name: Schoedel, Rainer
name: Najarro, Francisco
name: Hamano, Satoshi
name: Omiya, Masashi
name: Tamura, Motohide
name: Takahashi, Mizuki
name: Gorin, Haruka
name: Nagatomo, Schun
name: Nagata, Tetsuya
Publisher: name: arXiv
Year: 2017
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: During the next closest approach of the orbiting star S2/S0-2 to the Galactic supermassive black hole (SMBH), it is estimated that RV uncertainties of ~ 10 km/s allow us to detect post-Newtonian effects throughout 2018. To evaluate an achievable uncertainty in RV and its stability, we have carried out near-infrared, high resolution (R ~ 20,000) spectroscopic monitoring observations of S2 using the Subaru telescope and the near-infrared spectrograph IRCS from 2014 to 2016. The Br-gamma absorption lines are used to determine the RVs of S2. The RVs we obtained are 497 km/s, 877 km/s, and 1108 km/s in 2014, 2015, and 2016, respectively. The statistical uncertainties are derived using the jackknife analysis. The wavelength calibrations in our three-year monitoring are stable: short-term (hours to days) uncertainties in RVs are < 0.5 km/s, and a long-term (three years) uncertainty is 1.2 km/s. The uncertainties from different smoothing parameter, and from the partial exclusion of the spectra, are found to be a few km/s. The final results using the Br-gamma line are 497 +- 17 (stat.) +- 3 (sys.) km/s in 2014, 877 +- 15 (stat.) +- 4 (sys.) km/s in 2015, and 1108 +- 12 (stat.) +- 4 (sys.) km/s in 2016. When we use two He I lines at 2.113\mum in addition to Br-gamma, the mean RVs are 513 km/s and 1114 km/s for 2014 and 2016, respectively. The standard errors of the mean are 16.2 km/s (2014) and 5.4 km/s (2016), confirming the reliability of our measurements. The difference between the RVs estimated by Newtonian mechanics and general relativity will reach about 200 km/s near the next pericenter passage in 2018. Therefore our RV uncertainties of 13 - 17 km/s with Subaru enable us to detect the general relativistic effects in the RV measurements with more than 10 sigma in 2018.
description: 27 pages, 14 figures, 8 tables, submitted to PASJ
Socialz: Multi-Feature Social Fuzz Testing
Creators: name: Zanartu, Francisco
name: Treude, Christoph
name: Wagner, Markus
Publisher: name: arXiv
Year: 2023
Subjects: subject: Software Engineering (cs.SE)
subject: Neural and Evolutionary Computing (cs.NE)
subject: FOS: Computer and information sciences

description: Online social networks have become an integral aspect of our daily lives and play a crucial role in shaping our relationships with others. However, bugs and glitches, even minor ones, can cause anything from frustrating problems to serious data leaks that can have farreaching impacts on millions of users. To mitigate these risks, fuzz testing, a method of testing with randomised inputs, can provide increased confidence in the correct functioning of a social network. However, implementing traditional fuzz testing methods can be prohibitively difficult or impractical for programmers outside of the social network's development team. To tackle this challenge, we present Socialz, a novel approach to social fuzz testing that (1) characterises real users of a social network, (2) diversifies their interaction using evolutionary computation across multiple, non-trivial features, and (3) collects performance data as these interactions are executed. With Socialz, we aim to put social testing tools in everybody's hands, thereby improving the reliability and security of social networks used worldwide. In our study, we came across (1) one known limitation of the current GitLab CE and (2) 6,907 errors, of which 40.16% are beyond our debugging skills.
description: to be published in GECCO 2024, July 14-18, 2024, Melbourne, VIC, Australia
On Jaky constant of oedometers, Rowe's relation and incremental modeling
Creators: name: Evesque, P.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: It is recalled that stress-strain incremental modelling is a common feature of most theoretical description of the mechanical behaviour of granular material. An other commonly accepted characteristics of the mechanical behaviour of granular material is the Rowe's relation which links the dilatancy K to the ratio B of vertical to lateral stress during a test at constant lateral stress, i.e. B=(1+M)(1+K). We combine these two features and extract an incremental pseudo-Poisson coefficient which varies with the stress ratio . We solve the oedometric-test case, starting from isotropic sample and stress, for which the vertical stress is increased continuously. It is found that the stress ratio B evolves towards an asymptotic value ko which depends on the friction angle only. It is shown that this asymptotic value ko compares well with the experimental fit known as the Jaky constant.
description: 9 pages, 1 figure
A posteriori error control for stationary coupled bulk-surface equations
Creators: name: Eigel, Martin
name: Müller, Rüdiger
Publisher: name: Weierstrass Institute
Year: 2015
Subjects: subject: finite element method
subject: a posteriori error estimator
subject: adaptive algorithm
subject: surface finite elements
subject: bulk-surface elliptic equations
subject: 65N30
subject: 65N15
subject: 58J32
subject: 65M15
subject: 74S05
subject: 65M60

description: We consider a system of two coupled elliptic equations, one defined on a bulk domain and the other one on the boundary surface. Problems of this kind are relevant for applications in engineering, chemistry and in biology like e.g. biological signal transduction. For the a posteriori error control of the coupled system, a residual error estimator is derived which takes into account the approximation errors due to the finite element discretisation in space as well as the polyhedral approximation of the surface. An adaptive refinement algorithm controls the overall error. Numerical experiments illustrate the performance of the a posteriori error estimator and the adaptive algorithm with several benchmark examples.
Clockwork for Neutrino Masses and Lepton Flavor Violation
Creators: name: Ibarra, Alejandro
name: Kushwaha, Ashwani
name: Vempati, Sudhir K.
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We investigate the generation of small neutrino masses in a clockwork framework which includes Dirac mass terms as well as Majorana mass terms for the new fermions. We derive analytic formulas for the masses of the new particles and for their Yukawa couplings to the lepton doublets, in the scenario where the clockwork parameters are universal. When the Majorana masses all vanish, the zero mode of the clockwork sector forms a Dirac pair with the active neutrino, with a mass which is in agreement with oscillations experiments for a sufficiently large number of clockwork gears. On the other hand, when the Majorana masses do not vanish, neutrino masses are generated via the seesaw mechanism. In this case, and due to the fact that the effective Yukawa couplings of the higher modes can be sizable, neutrino masses can only be suppressed by postulating a large Majorana mass for all the gears. Finally, we discuss the constraints on the mass scale of the clockwork fermions from the non-observation of the rare leptonic decay $μ\rightarrow eγ$.
description: 11 pages, 7 figures
On the Relative Role of East and West Pacific Sea Surface Temperature (SST) Gradients in the Prediction Skill of Central Pacific NINO3.4 SST
Creators: name: S, Lekshmi
name: Chattopadhyay, Rajib
name: Pai, D. S.
name: Rajeevan, M.
name: Valsala, Vinu
name: Hosalikar, K. S.
name: Mohapatra, M.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Physical sciences

description: Dominant modes of SST in the west and east Pacific show strong but regionally different gradients caused by waves, internal dynamics, and anthropogenic warming, which drives air-sea interaction in the Pacific. The study discusses the relative contribution of SST gradients over the western and eastern Pacific to the prediction skill of SST in the central Pacific, where El-Nino, La-Nina, or El-Nino Modoki events project significantly. For this, the analysis develops a convolutional neural network (CNN) based prediction model to predict the Nino3.4 SST. CNN-based prediction models use a spatial filter at the initial stage, which is highly efficient in capturing the edges or gradients and hence are useful to understand the role of SST spatial gradients in the prediction skill. The study reports three CNN-based model experiments. The first one is a CTRL experiment that uses the whole equatorial Pacific domain SST pattern. The second and third models use the equatorial eastern and western Pacific domain SST only. Another novel feature of this study is that we have generated a large number of ensemble members (5000) through random initialization of CNN filters. It is found that random initialization affects the forecast skill, and the probability density function of the correlation skill of the 5000 models at each lead time shows a gaussian distribution. The model experiments suggest that the west Pacific SST model provides better Nino3.4 skills as compared to the east Pacific skill. The CNN-based model forecast based on the SST pattern, thus, shows the impact of the SST spatial pattern on the ENSO forecast.
description: 21 pages, 11 figures
Dynamical localization and slow dynamics in quasiperiodically-driven quantum systems
Creators: name: Tiwari, Vatsana
name: Bhakuni, Devendra Singh
name: Sharma, Auditya
Publisher: name: arXiv
Year: 2023
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: We investigate the role of a quasiperiodically driven electric field in a one-dimensional disordered fermionic chain. In the clean non-interacting case, we show the emergence of dynamical localization - a phenomenon previously known to exist only for a perfect periodic drive. In contrast, in the presence of disorder, where a periodic drive preserves Anderson localization, we show that the quasiperiodic drive destroys it and leads to slow relaxation. Considering the role of interactions, we uncover the phenomenon of quasiperiodic driving-induced logarithmic relaxation, where a suitably tuned drive (corresponding to dynamical localization in the clean, non-interacting limit) slows down the dynamics even when the disorder is small enough for the system to be in the ergodic phase. This is in sharp contrast to the fast relaxation seen in the undriven model, as well as the absence of thermalization (drive-induced MBL) exhibited by a periodically driven model.
description: 8+6 pages, 1 table, 3+7 figures
MPEC 2025-H159 : 2025 HN4
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2025
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2025 HN4

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Optimal calibration of exponential Levy models
Creators: name: Belomestny, Denis
name: Reiss, Markus
Publisher: name: Weierstrass Institute
Year: 2005
Subjects: subject: European option
subject: jump diffusion
subject: minimax rate
subject: severely ill-posed
subject: nonlinear inverse problem
subject: 62G20
subject: 60G51
subject: 91B28

description: Based on options data at the market the problem of calibrating an exponential Lévy model for the underlying asset is investigated. It is shown that this statistical inverse problem is in general severely ill-posed and exact minimax rates of convergence are derived. The estimation procedure we propose is based on the explicit inversion of the option price formula in the spectral domain and a cut-off scheme for high frequencies as regularisation. Its performance is illustrated by numerical simulations.
title: ADCO, Cartulaire général de Cîteaux, dit de Jean de Cirey, (XVe siècle), tome VI, Cart. 190 (11 H 75), 316 folios, f. 0251r
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
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2020
Subjects: subject: Corpus Burgundiae Medii Aevi
subject: Chartes de la Bourgogne du Moyen Âge
subject: LaMOP
subject: Laboratoire de Médiévistique Occidentale de Paris
subject: cartulaire

description: Cartulaire général de Cîteaux, dit de Jean de Cirey, (XVe siècle), tome VI, Archives départementales de la Côte-d'Or, Cart. 190 (11 H 75), 316 folios, f. 0251r, 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 VI, Archives départementales de la Côte-d'Or, Cart. 190 (11 H 75), 316 folios, f. 0251r, in Projet CBMA - Corpus Burgundiae Medii Aevi [Ressource en ligne], https:// manuscrits.cbma-project.eu/
description: Provenance: https://www.geonames.org/3024876
description: Provenance: http://www.idref.fr/030974844/id
description: Provenance: https://catalogue.bnf.fr/ark:/12148/cb12228351v
description: Provenance: abbaye de Cîteaux
description: Provenance: http://www.wikidata.org/entity/Q843261
title: Corpus LS-Colin sur plusieurs genres discursifs (Nicolas Van Lancker, Frédéric Girardin et Victor Abbou)
Creators: name: Cuxac, Christian
name: Fiore, Sonia
name: Boutet, Dominique
Publisher: name: COCOON - https://cocoon.huma-num.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2014
Subjects: subject: Langue des signes française
subject: fsl

description: Conforms to: doi:10.34847/cocoon.49aefa90-8c1f-3ba8-a099-0ebefc6a2aa7
[Estimado Sr. Cortázar: Adjunto una copia de mi carta del 4 de marzo de 1982]
Creators: name: Donald L., Gibbs
name: Gibbs, Donald L.
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2021
Subjects: Venta manuscritos de Cortázar

description: Carta del Jefe de adquisiciones de la Benson Latin American Collection (Universidad de Texas en Austin). Sería preferible para ellos de comprar los manuscritos de una vez, pero es imposible.
description: Notas: Papel con membrete: "The University of Texas at Austin – The General Libraries". Falta la copia de la carta adjunta del 4 de marzo de 1982 anunciada en el texto.
description: Source: Num.Ref. : JC-DY-CAR-01.007
description: Source: Localización del archivo: Centre de Recherches Latino-Américaines (CRLA–Archivos, ITEM UMR8132). MSHS - Bât. A5, 1er étage 5 rue Théodore Lefebvre - TSA21103. 86073 Poitiers cedex 9.