cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Production of Fock Mixtures in Trapped Ions for Motional Metrology
Creators: name: Delakouras, Antonis
name: Rodríguez, Daniel
name: Cerrillo, Javier
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We present a protocol to produce a class of non-thermal Fock state mixtures in trapped ions. This class of states features a clear metrological advantage with respect to the ground state, thus overcoming the standard quantum limit without the need for full sideband cooling and Fock-state preparation on a narrow electronic transition. The protocol consists in the cyclic repetition of red-sideband, measurement and preparation laser pulses. By means of the Kraus map representation of the protocol, it is possible to relate the length of the red sideband pulses to the specific class of states that can be generated. With the help of numerical simulations, we analyze the parametric regime where these states can be reliably reproduced.
description: 16 pages, 6 figures
title: Examining the impact force of debris flow in a check dam from small-flume experiments
Creators: name: Eu, Song
name: Im, Sangjun
Publisher: name: Mountain Scholar
Year: 2019
Subjects: debris flow
Impact force
Flume experiment
Structure design

description: Debris flow is one of the most hazardous disasters in mountain regions of Korea. Rainfall-induced debris flows have occurred more frequently during past decades due to climate changes. Especially, its threat on many lives and properties in urban or suburban areas have increased. To control debris-flow disaster, check dams have been constructed in forest watersheds since 1985. Although check dams that recently constructed in Korea are expected to function as debris-flow barriers, impact force has not been considered during design procedure. For effective structure design regarding debris-flow disaster, estimation of debris-flow impact force is necessary. Meanwhile, it is well known that impact force is closely related to the flow characteristics of debris flow. In this study, small flume experiments were conducted to analyze the influence of flow characteristics to impact force of debris flow. Flume slope, total volume, and viscosity of mixture were selected as experiment variables. As a result, faster flow velocity was observed on steeper channel slope and larger mixture volume condition. In terms of viscosity, sediment-water mixture flowed faster as the viscosity becomes lower. The effect of flume slope on flow velocity was different as the viscosity of mixtures. However, flowing depth was correlated only to total mixture volume. Impact force was positively correlated to flow velocity and flow depth. By comparing various impact force estimation model, the hydrodynamic model has been selected for the best method to appropriately calculate the design impact force for check dams in small forested watersheds.
Quantum Correlations, Local Interactions and Error Correction
Creators: name: Vedral, V.
name: Rippin, M. A.
name: Plenio, M. B.
Publisher: name: arXiv
Year: 1996
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We consider the effects of local interactions upon quantum mechanically entangled systems. In particular we demonstrate that non-local correlations cannot increase through local operations on any of the subsystems, but that through the use of quantum error correction methods, correlations can be maintained. We provide two mathematical proofs that local general measurements cannot increase correlations, and also derive general conditions for quantum error correcting codes. Using these we show that local quantum error correction can preserve nonlocal features of entangled quantum systems. We also demonstrate these results by use of specific examples employing correlated optical cavities interacting locally with resonant atoms. By way of counter example, we also describe a mechanism by which correlations can be increased, which demonstrates the need for it non-local interactions.
description: submitted to The Physical Review A
Great-Grandad Harry's Diary: A Journey Through Captivity
Creators: name: Project Team, Their Finest Hour
Publisher: name: University of Oxford
Year: 2024
Subjects: classificationCode: 430304
subject: British history
classificationCode: 430308
subject: European history (excl. British, classical Greek and Roman)
classificationCode: 430316
subject: International history

description: My great-grandad Harry was an infantry soldier during WWII. On 28 May 1941, he was captured in Crete, Greece, by the Nazis. Harry was then held for three years at a German prisoner-of-war camp. He was released on 13 April 1945. Before the Nazis captured him, he wrote a diary about the war and where he was going to be taken to fight. Harry carried on with this diary during his time at the camp. In his scrapbook, he loved to draw comics and write poems. The scrapbook shows things like the currency they used to buy things at the canteen and the menu for Christmas dinner in Germany. Also, it shows the birthday cards he received whilst at the prisoner-of-war camp.
Consolidating the Grid and interactive analysis infrastructure at DESY - past and future
Creators: name: Hartmann, Thomas
name: Fuhrmann, Patrick
name: Guelzow, Volker
name: Kemp, Yves
name: Finnern, Thomas
name: Beyer, Christoph
name: Gellrich, Andreas
name: Flemming, Martin
name: Lewendel, Birgit
name: Voss, Christian
Publisher: name: Zenodo
Year: 2019

description: DESY manages not only one of the largest Tier-2 sites with about 18 500 CPU cores for Grid workloads but also about 8000 CPU cores for interactive user analyses. In this presentation, we recapitulate the consolidation of the batch systems in a common HTCondor based setup and the lessons learned as both use cases differ in their goals. Followingly, we will give an outlook on the future developments.\newline While for Grid jobs startup latencies are negligible and the primary focus is on an optimal utilization of the resources, users of the {\it National Analysis Factory} for interactive analyses prefer a high responsiveness of the batch system as well as the storage.\newline In the ongoing evolution of the batch system, we are exploring two different approaches to abstract the batch node's host OS from the actual job OS. For Grid jobs we are running legacy workloads in lightweight Singularity containers deployed via CVMFS. For interactive NAF jobs, we move towards Docker containers for a more heavy weight replication of a full batch node to provide the users with their full set of accustomed tools.\newline To utilize resources best we further investigate the opportunistically backfilling resources, especially GPU nodes, between pools without interfering with user experiences.
Appearence of Mother Universe and Singular Vertices in Random Geometries
Creators: name: Bialas, P.
name: Burda, Z.
name: Petersson, B.
name: Tabaczek, J.
Publisher: name: arXiv
Year: 1996
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We discuss a general mechanism that drives the phase transition in the canonical ensemble in models of random geometries. As an example we consider a solvable model of branched polymers where the transition leading from tree- to bush-like polymers relies on the occurrence of vertices with a large number of branches. The source of this transition is a combination of the constraint on the total number of branches in the canonical ensemble and a nonlinear one-vertex action. We argue that exactly the same mechanism, which we call constrained mean-field, plays the crucial role in the phase transition in 4d simplicial gravity and, when applied to the effective one-vertex action, explains the occurrence of both the mother universe and singular vertices at the transition point when the system enters the crumpled phase.
description: 13 latex pages + 6 ps fig. + elsart.cls, uufiles-encoded
No large population of unbound or wide-orbit Jupiter-mass planets
Creators: name: Mroz, Przemek
name: Udalski, Andrzej
name: Skowron, Jan
name: Poleski, Radoslaw
name: Kozlowski, Szymon
name: Szymanski, Michal K.
name: Soszynski, Igor
name: Wyrzykowski, Lukasz
name: Pietrukowicz, Pawel
name: Ulaczyk, Krzysztof
name: Skowron, Dorota
name: Pawlak, Michal
Publisher: name: arXiv
Year: 2017
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Gravitational microlensing is the only method capable of exploring the entire population of free-floating planets down to Mars-mass objects, because the microlensing signal does not depend on the brightness of the lensing object. A characteristic timescale of microlensing events depends on the mass of the lens: the less massive the lens, the shorter the microlensing event. A previous analysis of 474 microlensing events found an excess of very short events (1-2 days) - more than known stellar populations would suggest - indicating the existence of a large population of unbound or wide-orbit Jupiter-mass planets (reported to be almost twice as common as main-sequence stars). These results, however, do not match predictions of planet formation theories and are in conflict with surveys of young clusters. Here we report the analysis of a six times larger sample of microlensing events discovered during the years 2010-2015. Although our survey has very high sensitivity (detection efficiency) to short-timescale (1--2 days) microlensing events, we found no excess of events with timescales in this range, with a 95% upper limit on the frequency of Jupiter-mass free-floating or wide-orbit planets of 0.25 planet per main-sequence star. We detected a few possible ultrashort-timescale events (with timescales of less than 0.5 day), which may indicate the existence of Earth- and super-Earth-mass free-floating planets, as predicted by planet-formation theories. [abridged]
description: published in Nature, authors' version (see nature.com for the published version)
Learning the Pedestrian-Vehicle Interaction for Pedestrian Trajectory Prediction
Creators: name: Zhang, Chi
name: Berger, Christian
Publisher: name: arXiv
Year: 2022
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Artificial Intelligence (cs.AI)
subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences
subject: I.2, I.4.8

description: In this paper, we study the interaction between pedestrians and vehicles and propose a novel neural network structure called the Pedestrian-Vehicle Interaction (PVI) extractor for learning the pedestrian-vehicle interaction. We implement the proposed PVI extractor on both sequential approaches (long short-term memory (LSTM) models) and non-sequential approaches (convolutional models). We use the Waymo Open Dataset that contains real-world urban traffic scenes with both pedestrian and vehicle annotations. For the LSTM-based models, our proposed model is compared with Social-LSTM and Social-GAN, and using our proposed PVI extractor reduces the average displacement error (ADE) and the final displacement error (FDE) by 7.46% and 5.24%, respectively. For the convolutional-based models, our proposed model is compared with Social-STGCNN and Social-IWSTCNN, and using our proposed PVI extractor reduces the ADE and FDE by 2.10% and 1.27%, respectively. The results show that the pedestrian-vehicle interaction influences pedestrian behavior, and the models using the proposed PVI extractor can capture the interaction between pedestrians and vehicles, and thereby outperform the compared methods.
description: 7 pages, 3 figures. Accepted in 2022 the 8th International Conference on Control Automation and Robotics (ICCAR), IEEE, 2022
Ferret Data Server (FDS): Ferret as an OPeNDAP server
Creators: name: Callahan, Jonathan
Publisher: name: Zenodo
Year: 2004

description: About the workshop:

OPeNDAP and NOAA/PMEL held a joint tutorial/workshop at the Stennis Space Center from 28-30 September 2004. The workshop covered OPeNDAP's software, the operation of some of the clients and installation of servers as well as some of the DAP-compliant software developed at PMEL.

Here is the list of presentations from the workshop. All of the slide decks for these presentations are available on the Zenodo OPeNDAP community page. 

OPeNDAP Overview

Matlab Client Use (short)

Server Basics

Server Installation

Advanced Topics

THREDDS, The Aggregation Server and Server Registration, plus two *.xml files that were used in the tutorial

Ferret

FDS

LAS

Relinking Programs with the NetCDF Client-Library (bonus; not presented at the workshop due to a lack of time)

Summary of the slide deck: 

The slide deck introduces the Ferret Data Server (FDS), which facilitates server development by providing reusable components for responding to the OPeNDAP API, managing backend process space, error handling, and abuse filtering. FDS features include the OPeNDAP API, abuse filters, XML-based configuration files, and the ability to use Ferret journal scripts to synthesize datasets, along with URL syntax for server-side calculations. The presentation includes tutorials on subsetting, expressions, and regridding using FDS, along with configuration details such as the configuration file location, data directory, and data cache setup. Additionally, the slide deck provides examples of FDS URLs for various operations and directs users to FDS documentation for further information.
title: ADCO, Grènetier de Cîteaux : comptes (1499-1503) (11 H 1173), f. 00612
Creators: name: de la Côte-d'Or, Archives départementales
name: Archives Départementales De La Côte-D'Or
name: Petot, Frédérique
name: Projet CBMA
name: CBMA/CG21/F.PETOT/2019
name: Petot, Frédéric
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2020
Subjects: subject: comptes
subject: LaMOP
subject: Laboratoire de Médiévistique Occidentale de Paris
subject: Corpus Burgundiae Medii Aevi
subject: Chartes de la Bourgogne du Moyen Âge

description: Grènetier de Cîteaux : comptes (1499-1503), Archives départementales de la Côte-d'Or, (11 H 1173). Numérisation en mode image.
description: Relation: http://www.cbma-project.eu/
description: Bibliographic citation: Grènetier de Cîteaux : comptes (1499-1503), Archives départementales de la Côte-d'Or, (11 H 1173), f. 00612, 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
Biosynthesis of plant allyl/propenyl-phenols and 9,9'-deoxygenated lignans
Creators: name: Vassao, Daniel Giddings
Publisher: name: Washington State University
Year: 2008
Subjects: Plant molecular biology

description: The elaboration of the phenylpropanoid pathway, 400-450 million years ago, is thought to represent one of the major steps that afforded the opportunity for land colonization by plants. Perhaps the most important and widespread outcome of this pathway is the ability to produce structural polymers (lignins) that are deposited in cell walls, which help confer resistance against diverse environmental/physical stresses and which allow plants to stand upright. Additionally, further development of this pathway also resulted in branching metabolic pathways for synthesis of specialized lower molecular weight phenylpropanoids; some of these contribute to many aspects of plant defense, others have roles in pollinator attraction, and others are of interest to humans as regards flavors, fragrances, medicinals and in health protection. This dissertation describes the elucidation of biochemical pathways leading to monomeric plant phenylpropanoid derivatives, allylphenols and propenylphenols, as well as our attempts to understand further downstream metabolism in a few selected species. Allyl/propenyl-phenols are important volatile components of the aromas and flavors of historically important spices and herbs, and they are also presumed to serve as substrates for coupling reactions that result in 9,9?-deoxygenated lignans. Here, the hitherto unknown intermediates within this pathway are established, along with the identification and characterization of some genes and encoded enzymes that play crucial roles in side-chain deoxygenation, namely monolignol acyltransferases and monolignol ester reductases. These discoveries can now be exploited through the generation of transgenic plants, thus potentially creating new sources of flavor compounds, polymers and biofuels.
Refined horoball counting and conformal measure for Kleinian group actions
Creators: name: Fraser, Jonathan M.
name: Stuart, Liam
Publisher: name: arXiv
Year: 2022
Subjects: subject: Dynamical Systems (math.DS)
subject: Classical Analysis and ODEs (math.CA)
subject: Metric Geometry (math.MG)
subject: FOS: Mathematics
subject: 30F40, 28A80 (Primary) 11J83 (Secondary)

description: Parabolic fixed points form a countable dense subset of the limit set of a non-elementary geometrically finite Kleinian group with at least one parabolic element. Given such a group, one may associate a standard set of pairwise disjoint horoballs, each tangent to the boundary at a parabolic fixed point. The diameter of such a horoball can be thought of as the `inverse cost' of approximating an arbitrary point in the limit set by the associated parabolic point. A result of Stratmann and Velani allows one to count horoballs of a given size and, roughly speaking, for small $r>0$ there are $r^{-δ}$ many horoballs of size approximately $r$, where $δ$ is the Poincaré exponent of the group. We investigate localisations of this result, where we seek to count horoballs of size approximately $r$ inside a given ball $B(z,R)$. Roughly speaking, if $r \lesssim R^2$, then we obtain an analogue of the Stratmann-Velani result (normalised by the Patterson-Sullivan measure of $B(z,R)$). However, for larger values of $r$, the count depends in a subtle way on $z$. Our counting results have several applications, especially to the geometry of conformal measures supported on the limit set. For example, we compute or estimate several `fractal dimensions' of certain $s$-conformal measures for $s>δ$ and use this to examine continuity properties of $s$-conformal measures at $s=δ$.
description: 21 pages, 4 figures
Modeling effects of contrasting tillage and management on hydrological processes in selected soils of the Pacific Northwest US
Creators: name: Singh, Prabhakar
Publisher: name: Washington State University
Year: 2008
Subjects: Soil management -- Computer simulation

description: Soil erosion by water is detrimental to fertility and crop yield as well as soil biological and physical properties. Soil erosion could be affected by winter precipitation, intermittent freezing and thawing of soils, steep slopes, and improper management practices as well as combination of these factors. The tillage practices play an important role on infiltration, winter runoff and erosion, and seed-zone water storage. Understanding of hydrological processes is crucial to developing land-use and management plans for reducing runoff and erosion and for conserving seed-zone water. Adequate understanding of hydrological processes is also essential to develop models that can serve as effective predictive tools. The objectives were as follows: 1. to assess the suitability of WEPP, a physically-based erosion model with a newly implemented energy-budget-based winter routine, for quantifying field-observed winter processes; 2. to evaluate winter hydrological and erosion processes as affected by two contrasting tillage practices; 3. to assess the effects of Chemical Fallow (CF) and Reduced-tillage Fallow (RT) on seed- and root-zone water and temperature regimes; 4. to test the Simultaneous Heat and Water (SHAW) model's ability to simulate management effects on soil water and temperature distribution. Long-term erosion research plots (2003-07) subject to continuous tilled bare fallow (CTBF), and continuous no-tillage (NT), were established at the USDA-ARS Palouse Conservation Field Station near Pullman, WA. The plots were monitored for runoff, erosion, soil temperature and water content, and depths of snow and freeze-thaw as well as climate data. The study with paired CF and RT treatments was conducted in 2003-04 at the Dryland Research Station at Lind, WA. Field data showed that NT plots generated negligible runoff and erosion compared to CTBF. Frost occurred more frequently and frost depth was deeper in the CTBF compared to the NT. The modified WEPP model could reasonably reproduce major winter processes. Yet it cannot represent all the complicated winter phenomena observed in the field. The RT treatment retained more seed-zone water during the summer compared to CF. In general, soil temperatures in the CF were higher than the RT. Overall, SHAW proved adequate in simulating seed-zone and whole-profile soil water and temperature.
Introducción: La interdisciplina en las Ciencias Sociales
Creators: name: Ortega, Rocío Rosales
name: Ramírez, Servando Gutiérrez
name: Franco, José Luis Torres
Publisher: name: figshare
Year: 2018
Subjects: subject: Sociology
subject: FOS: Sociology

description: (2006) en La interdisciplina en las Ciencias Sociales, Anthropos, UAM-Iztapalapa, Barcelona, España, pp. 7-21
title: Finite element method for conserved phase field models
title: Solid state phase transformations
titleType: Subtitle
Creators: name: Zaeem, Mohsen Asle
Publisher: name: Washington State University
Year: 2010
Subjects: Finite element method

description: Cahn-Hilliard type of phase field model coupled with elasticity equations is used to derive governing equations for the stress-mediated diffusion and solid state phase transformations. The partial differential equations governing diffusion and mechanical equilibrium are of different orders. A mixed-order finite element formulation is developed, with C0 interpolation functions for displacements, and C1 interpolation functions for the phase field variable the concentration. Uniform quadratic convergence, expected for conforming elements, is achieved for both one and two dimensional systems. The developed finite element model (FEM) is used to simulate the nucleation and growth of the intermediate phase in a thin film diffusion couple as one-dimensional (1D) problem and the results are compared with Johnson s finite difference model (FDM). Two-dimensional (2D) simulations are divided into two categories. In the first category, 2D model is applied to study phase transformations of single precipitates in solid state binary systems, and the effects of using complete and incomplete Hermite cubic elements on the transformation rate of systems with isotropic and anisotropic gradient energy coefficients are investigated. In the second category, 2D model is used to study the stability of multilayer thin film diffusion couples in solid state. Maps of transformations in multilayer systems are carried out considering the effects of thickness of layers, volume fraction of films, and compositional strain on the instability of the multilayer thin films. It is shown that at some cases phase transformations and intermediate phase nucleation and growth lead to the coarsening of the layers which can result in different mechanical and materials behaviors of the original designed multilayer.
Regularized Zero-Range Hamiltonian for a Bose Gas with an Impurity
Creators: name: Ferretti, Daniele
name: Teta, Alessandro
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mathematical Physics (math-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences
subject: 81Q10, 81Q15, 70F07, 46N50, 81V70

description: We study the Hamiltonian for a system of N identical bosons interacting with an impurity, i.e., a different particle, via zero-range forces in dimension three. It is well known that, following the standard approach, one obtains the Ter-Martirosyan Skornyakov Hamiltonian which is unbounded from below. In order to avoid such instability problem, we introduce a three-body force acting at short distances. The effect of this force is to reduce to zero the strength of the zero-range interaction between two particles, i.e., the impurity and a boson, when another boson approaches the common position of the first two particles. We show that the Hamiltonian defined with such regularized interaction is self-adjoint and bounded from below if the strength of the three-body force is sufficiently large. The method of the proof is based on a careful analysis of the corresponding quadratic form.
description: 38 pages
Accretion in protoplanetary disks: the imprint of core properties
Creators: name: Dullemond, C. P.
name: Natta, A.
name: Testi, L.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: In this Letter we present a theoretical scenario to explain the steep correlation between disk accretion rates and stellar masses observed in pre-main sequence stars. We show that the correlations and spread observed in the two best studied regions, rho-Ophiuchus and Taurus, can be reproduced by a simple model of single star formation from a rotating collapsing core and the viscous evolution of the circumstellar disk. In this model, the rate of rotation of the parent core sets the value of the `centrifugal radius' within which the infalling matter is loaded onto the surface of the disk. As a consequence, the disk accretion rate measured long after the dispersal of the parental core bears the imprint of the initial conditions of star formation. The observed trend results naturally if, at the onset of the collapse, cores of all masses rotate with the same distribution of angular velocities, measured in units of the break-up rotation rate.
description: Accepted for publication in Astrophysical Journal Letters
Joint Smoothing, Tracking, and Forecasting Based on Continuous-Time Target Trajectory Fitting
Creators: name: Li, Tiancheng
name: Chen, Huimin
name: Sun, Shudong
name: Corchado, Juan M
Publisher: name: arXiv
Year: 2017
Subjects: subject: Applications (stat.AP)
subject: Systems and Control (eess.SY)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: We present a continuous time state estimation framework that unifies traditionally individual tasks of smoothing, tracking, and forecasting (STF), for a class of targets subject to smooth motion processes, e.g., the target moves with nearly constant acceleration or affected by insignificant noises. Fundamentally different from the conventional Markov transition formulation, the state process is modeled by a continuous trajectory function of time (FoT) and the STF problem is formulated as an online data fitting problem with the goal of finding the trajectory FoT that best fits the observations in a sliding time-window. Then, the state of the target, whether the past (namely, smoothing), the current (filtering) or the near-future (forecasting), can be inferred from the FoT. Our framework releases stringent statistical modeling of the target motion in real time, and is applicable to a broad range of real world targets of significance such as passenger aircraft and ships which move on scheduled, (segmented) smooth paths but little statistical knowledge is given about their real time movement and even about the sensors. In addition, the proposed STF framework inherits the advantages of data fitting for accommodating arbitrary sensor revisit time, target maneuvering and missed detection. The proposed method is compared with state of the art estimators in scenarios of either maneuvering or non-maneuvering target.
description: 16 pages, 8 figures, 5 tables, 80 references; Codes available
Easy-to-use data schema management scheme for RDBMS that includes the utilization of the column-store features
Creators: name: Murakami, Tadashi
Publisher: name: Zenodo
Year: 2019

description: Relational database (RDB) and its management system (RDBMS) offer many advantages to us, such as a rich query language, maintainability gained from a concrete schema, robust and reasonable backup solutions such as differential backup, and so on. Recently, some of RDBMS has supported column-store features that offer data compression with a high level of both data size and query performance. These features are useful for data collection and management. However, it is not easy to leverage such features. First of all, RDBMS gains a reasonable performance only after a proper description of the data schema, which requires expertise. In this talk, we propose an easy-to-use data schema management scheme for RDBMS that includes the utilization of the column-store features. Our approach mainly focuses on time-series data. First of all, our approach supports appropriate schema generation to leverage an RDBMS that includes automatic creation of sub-tables and indexes. This is good preparation for leveraging column-store features in RDBMS. Along with the proposal, we implemented a prototype system on PostgreSQL-based RDBMS. Our preliminary experiments show a good performance over other ordinary approaches.
Homotopical Algebraic Context over Differential Operators
Creators: name: Di Brino, Gennaro
name: Pistalo, Damjan
name: Poncin, Norbert
Publisher: name: arXiv
Year: 2017
Subjects: subject: Algebraic Topology (math.AT)
subject: FOS: Mathematics

description: Building on previous works, we show that the category of non-negatively graded chain complexes of $D_X$-modules -- where $X$ is a smooth affine algebraic variety over an algebraically closed field of characteristic zero -- fits into a homotopical algebraic context in the sense of Toen and Vezzosi.
title: Women, (under)development, empire
title: The other(ed) margins in American studies
titleType: Subtitle
Creators: name: Hussain, Melissa Lee
Publisher: name: Washington State University
Year: 2010
Subjects: Imperialism

description: An endeavor that traverses the interdisciplinary areas of American studies, rhetorical theory, women s studies, ethnic studies, postcolonial studies, and literary studies, this project emerged from two basic questions: 1) What does it mean to do American Studies, if U.S. imperialism is taken into account? 2) In this era of globalization, what does a country like Bangladesh one of the poorest countries on this planet, which relies heavily on aid from the World Bank, the IMF, and western donors have to do with U.S. imperialism? The fundamental argument of this study is that if one inserts the tools of feminist political economy and rhetorical critique into certain methodologies of American Studies and also internationalizes American Studies to account for U.S. imperialism, Bangladesh described as the periphery of the periphery provides a crucial and challenging site of both theoretical and political interventions. Taking into account the many possible pitfalls for a project that internationalizes American Studies one that could very well reproduce imperialism this study asks what links can be found between such macrostructures of power-relations as U.S. imperialism, capitalism, racism, and patriarchy if we examine, for instance, the eugenist-racist family planning programs of USAID in Bangladesh or the country reports produced by the World Bank. However, this study does not simply fix and freeze a Third World site such as Bangladesh as an object of oppression and domination, but highlights active resistances to U.S. imperialism, capitalism, racism, and patriarchy emanating from Bangladesh in various forms, including cultural productions, feminist activist work, and mass movements. Also, a fundamental question of this study is how academic work can be pressed into the service of social change.
Non-Abelian Geometrical Phase for General Three-Dimensional Quantum Systems
Creators: name: Mostafazadeh, Ali
Publisher: name: arXiv
Year: 1996
Subjects: subject: Quantum Physics (quant-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Adiabatic $U(2)$ geometric phases are studied for arbitrary quantum systems with a three-dimensional Hilbert space. Necessary and sufficient conditions for the occurrence of the non-Abelian geometrical phases are obtained without actually solving the full eigenvalue problem for the instantaneous Hamiltonian. The parameter space of such systems which has the structure of $\xC P^2$ is explicitly constructed. The results of this article are applicable for arbitrary multipole interaction Hamiltonians $H=Q^{i_1,\cdots i_n}J_{i_1}\cdots J_{i_n}$ and their linear combinations for spin $j=1$ systems. In particular it is shown that the nuclear quadrupole Hamiltonian $H=Q^{ij}J_iJ_j$ does actually lead to non-Abelian geometric phases for $j=1$. This system, being bosonic, is time-reversal-invariant. Therefore it cannot support Abelian adiabatic geometrical phases.
description: Plain LaTeX, 17 pages
Efficient User-Centric Privacy-Friendly and Flexible Wearable Data Aggregation and Sharing
Creators: name: Jastaniah, Khlood
name: Zhang, Ning
name: Mustafa, Mustafa A.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences
subject: E.3; J.3

description: Wearable devices can offer services to individuals and the public. However, wearable data collected by cloud providers may pose privacy risks. To reduce these risks while maintaining full functionality, healthcare systems require solutions for privacy-friendly data processing and sharing that can accommodate three main use cases: (i) data owners requesting processing of their own data, and multiple data requesters requesting data processing of (ii) a single or (iii) multiple data owners. Existing work lacks data owner access control and does not efficiently support these cases, making them unsuitable for wearable devices. To address these limitations, we propose a novel, efficient, user-centric, privacy-friendly, and flexible data aggregation and sharing scheme, named SAMA. SAMA uses a multi-key partial homomorphic encryption scheme to allow flexibility in accommodating the aggregation of data originating from a single or multiple data owners while preserving privacy during the processing. It also uses ciphertext-policy attribute-based encryption scheme to support fine-grain sharing with multiple data requesters based on user-centric access control. Formal security analysis shows that SAMA supports data confidentiality and authorisation. SAMA has also been analysed in terms of computational and communication overheads. Our experimental results demonstrate that SAMA supports privacy-preserving flexible data aggregation more efficiently than the relevant state-of-the-art solutions.
Common valuations of division polynomials
Creators: name: Naskręcki, Bartosz
name: Verzobio, Matteo
Publisher: name: arXiv
Year: 2022
Subjects: subject: Number Theory (math.NT)
subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 11G05, 11G07, 11G50, 14H52

description: In this note we prove a formula for the cancellation exponent $k_{v,n}$ between division polynomials $ψ_n$ and $ϕ_n$ associated with a sequence $\{nP\}_{n\in\mathbb{N}}$ of points on an elliptic curve $E$ defined over a discrete valuation field $K$. The formula is identical with the result of Yabuta-Voutier for the case of finite extension of $\mathbb{Q}_{p}$ and generalizes to the case of non-standard Kodaira types for non-perfect residue fields.
description: Final version of the paper
Monte-Carlo study of the $Δρ$ parameter
Creators: name: Alonso, J. -L.
name: Boucaud, Ph.
name: van der Sijs, A. J.
Publisher: name: arXiv
Year: 1996
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present results concerning a lattice study of the electroweak $ρ$-parameter. We have used an SU(2)$\times$U(1) symmetric chiral Yukawa model built with Zaragoza fermions. The decoupling of the species doublers in this model is verified numerically. We find that the numerical data for $Δρ$ are well described by one-loop perturbation theory with the same finite volume and with the same finite cut-off. However, a finite cut-off can cause substantial deviations of $Δρ$ from the standard value, even in infinite volume.
description: 3 pages (LateX) with 3 figures (PostScript), uses espcrc2.sty (included). Talk presented at LATTICE96(other models)
My Grandad's Memories of WW2
Creators: name: Project Team, Their Finest Hour
Publisher: name: University of Oxford
Year: 2024
Subjects: classificationCode: 430304
subject: British history
classificationCode: 430308
subject: European history (excl. British, classical Greek and Roman)
classificationCode: 430316
subject: International history

description: This record contains a recording of an interview with Len Guy.
Many-Body Localization and Level Repulsion
Creators: name: Kjäll, Jonas A.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: Insertion of disorder in thermal interacting quantum systems decreases the amount of level repulsion and can turn them into many body localized phases. In this paper we use the many body picture to perturbatively study the effect of level repulsion in the localized phase. We find that most eigenstates can be described accurately in an approximate way, including many with rare resonances. A classification of the rare resonances shows that most types are exponentially rare and requires exponential fine tuning in an approximate description. The classification confirms that no rare thermal eigenstates can exist in a fully localized phase and we argue that all types of resonances need to become common if a continuous transition into a thermal phase should occur.
description: 7 pages, 10 figures, published version
Scattering in one dimension: The coupled Schroedinger equation, threshold behaviour and Levinson's theorem
Creators: name: Kiers, K. A.
name: van Dijk, W.
Publisher: name: arXiv
Year: 1996
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We formulate scattering in one dimension due to the coupled Schrödinger equation in terms of the $S$ matrix, the unitarity of which leads to constraints on the scattering amplitudes. Levinson's theorem is seen to have the form $η(0) = π(n_b + 1/2 n - 1/2 N)$, where $η(0)$ is the phase of the $S$ matrix at zero energy, $n_b$ the number of bound states with nonzero binding energy, $n$ the number of half-bound states, and $N$ the number of coupled equations. In view of the effects due to the half-bound states, the threshold behaviour of the scattering amplitudes is investigated in general, and is also illustrated by means of particular potential models.
description: to appear in Journal of Mathematic Physics, RevTex, 16 pages, 3 figures (PostScript)
A dimensionally split Cartesian cut cell method for hyperbolic conservation laws
Creators: name: Gokhale, Nandan
name: Nikiforakis, Nikos
name: Klein, Rupert
Publisher: name: arXiv
Year: 2017
Subjects: subject: Computational Physics (physics.comp-ph)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We present a dimensionally split method for solving hyperbolic conservation laws on Cartesian cut cell meshes. The approach combines local geometric and wave speed information to determine a novel stabilised cut cell flux, and we provide a full description of its three-dimensional implementation in the dimensionally split framework of Klein et al. [1]. The convergence and stability of the method are proved for the one-dimensional linear advection equation, while its multi-dimensional numerical performance is investigated through the computation of solutions to a number of test problems for the linear advection and Euler equations. When compared to the cut cell flux of Klein et al., it was found that the new flux alleviates the problem of oscillatory boundary solutions produced by the former at higher Courant numbers, and also enables the computation of more accurate solutions near stagnation points. Being dimensionally split, the method is simple to implement and extends readily to multiple dimensions.
The Assouad spectrum of Kleinian limit sets and Patterson-Sullivan measure
Creators: name: Fraser, Jonathan M.
name: Stuart, Liam
Publisher: name: arXiv
Year: 2022
Subjects: subject: Dynamical Systems (math.DS)
subject: Classical Analysis and ODEs (math.CA)
subject: Metric Geometry (math.MG)
subject: FOS: Mathematics
subject: 28A80, 37F32

description: The Assouad dimension of the limit set of a geometrically finite Kleinian group with parabolics may exceed the Hausdorff and box dimensions. The Assouad \emph{spectrum} is a continuously parametrised family of dimensions which `interpolates' between the box and Assouad dimensions of a fractal set. It is designed to reveal more subtle geometric information than the box and Assouad dimensions considered in isolation. We conduct a detailed analysis of the Assouad spectrum of limit sets of geometrically finite Kleinian groups and the associated Patterson-Sullivan measure. Our analysis reveals several novel features, such as interplay between horoballs of different rank not seen by the box or Assouad dimensions.
description: 31 pages, 11 figures. This paper used to form part of arXiv:2007.15493 which has subsequently been cut into three pieces
Compressed Sensing MRI Reconstruction using a Generative Adversarial Network with a Cyclic Loss
Creators: name: Quan, Tran Minh
name: Nguyen-Duc, Thanh
name: Jeong, Won-Ki
Publisher: name: arXiv
Year: 2017
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Compressed Sensing MRI (CS-MRI) has provided theoretical foundations upon which the time-consuming MRI acquisition process can be accelerated. However, it primarily relies on iterative numerical solvers which still hinders their adaptation in time-critical applications. In addition, recent advances in deep neural networks have shown their potential in computer vision and image processing, but their adaptation to MRI reconstruction is still in an early stage. In this paper, we propose a novel deep learning-based generative adversarial model, RefineGAN, for fast and accurate CS-MRI reconstruction. The proposed model is a variant of fully-residual convolutional autoencoder and generative adversarial networks (GANs), specifically designed for CS-MRI formulation; it employs deeper generator and discriminator networks with cyclic data consistency loss for faithful interpolation in the given under-sampled k-space data. In addition, our solution leverages a chained network to further enhance the reconstruction quality. RefineGAN is fast and accurate -- the reconstruction process is extremely rapid, as low as tens of milliseconds for reconstruction of a 256x256 image, because it is one-way deployment on a feed-forward network, and the image quality is superior even for extremely low sampling rate (as low as 10%) due to the data-driven nature of the method. We demonstrate that RefineGAN outperforms the state-of-the-art CS-MRI methods by a large margin in terms of both running time and image quality via evaluation using several open-source MRI databases.
description: submitted to IEEE Transactions on Medical Imaging
Promoting HEP Research-Based Education through Undergraduate Research Experience for Students
Creators: name: Othmane Bouhali
name: Akl, Maya Abi
name: Toufique, Yassine
Publisher: name: Zenodo
Year: 2019

description: Abstract Various studies have shown the crucial and strong impact that undergraduate research has on the learning outcome of students and its role in clarifying their career path. It was proven that promoting research at the undergraduate level is essential to build an enriched learning environment for students [1,2]. Students get exposed to the research world at an early stage, acquire new skills, learn about fundamental topics in depth, develop a professional identity and have a clearer idea about the career path they want to follow later. Undergraduate research enhances engaged learning and therefore is considered as a high-impact educational practice to achieve excellence. The High Energy and Medical Physics Group at TAMUQ has been supporting and engaging undergraduate students in different research projects in the areas of High Energy Physics and Medical Physics for the past six years. It attracted students more than 25 undergraduate students. Many projects conducted within the group were awarded by the Qatar National Research Fund which is a governmental funding body that provides funding to highly competitive projects that address national priorities and contribute to capacity building [3]. Students were trained to use a high performance computing facility, different HEP programming languages, software and Monte Carlo based platforms for their simulation. As for the outcomes, they participated and presented at international conferences, many of them attended CERN summer internship program and took part in different hands-on activities within the Compact Muon Solenoid (CMS) experiment at CERN. Some of the results produced by students were even published in scientific journals [4,5]. Several students are now enrolled in World Class universities for their master and PhD studies. These activities have laid the foundation of a strong and young group of researchers in Qatar. In this presentation, we highlight some of the various HEP projects that our students completed, the different tools that were used, as well as the research outcomes. Then, we will discuss the impact of this experience on their learning and undergraduate education as well as their career path, especially their postgraduate studies. References [1] Desai KV, Gatson SN, Stiles TW, Stewart RH, Laine GA, Quick CM. Integrating research and education at research-extensive universities with research-intensive communities. Adv Physiol Educ. 2008;32(2):136-41. [2] Heidi A. Wayment, K. Laurie Dickson. Increasing student participation in undergraduate research benefits students, faculty, and department. Teaching of Psychology 2008;35:194-97. [3] The Qatar National Research Fund, http://www.qnrf.org [4] M. Abi Akl et al., Uniformity studies in large area triple-GEM based detectors, Nuclear Instruments and Methods A832 (2016) [5] O. Bouhali et al., "Accelerating avalanche simulation in gas based charged particle detectors », Nucl. Inst. Method. 901(2018) 92.