cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Core from the Buzzard Field - Wells 20/6-3, 20/6-4 and 20/6-5
Creators: name: G. DORÉ
name: J. ROBBINS
Publisher: name: Geological Society of London
Year: 2020
Subjects: subject: Geology
subject: FOS: Earth and related environmental sciences

description: The selection of core from the Buzzard Field includes samples of some of the depositional facies from over 1200 ft of core acquired in six exploration/appraisal wells across the field. The reservoir interval largely comprises Late Jurassic age, base of slope, gravity flow sandstones. The structureless sandstones and laminated sandstones (that can be observed in Well 20/6-3) are typical of the main reservoir ('Buzzard 4') interval and are commonly tens of metres thick comprising amalgamated, homogeneous sandstones. Within the structureless sandstones the primary structure may have been erased by dewatering. These are interpreted as stacked turbidites that have undergone rapid depositon from surge-like flows. The thick laminated sandstone intervals contain thin, dark bituminous bands that highlight subtle variations in grain size, grain packing density and grain orientation on a centimetre to millimetre scale. These are interpreted as sustained turbidites or hyperpycnites that are indicative of continual sedimentation in a near-slope depositional setting (possibly related to river flooding). Sandier facies are interbedded with structureless and laminated mudrocks, suggesting the accumulation of hemipelagic sediments and dilute mud-rich turbidity currents respectively. Several calcite cemented intervals are also seen in the core representing doggers with little lateral continuity. Core from Well 20/6-5 illustrates the Buzzard Field OWC. The field has an estimated hydrocarbon column of 1400 ft.
Simulation of a Hydraulic Reservoir Air Pressurization System
Creators: name: Müller, Christian
name: Scholz, Dieter
Publisher: name: HAW Hamburg
Year: 2007
Subjects: subject: simulation
subject: air
subject: pressurization
subject: hydraulic
subject: reservoir
subject: MATLAB
subject: Simulink
subject: flow
subject: limiter
subject: tube
subject: valve
subject: Luftbedruckung
subject: Hydraulikreservoir
subject: Druckbegrenzer
subject: Rohr
subject: Ventil
subject: 620: Ingenieurwissenschaften

description: This Technical Note describes the dynamical simulation of a reservoir pressurizing system. The simulation is based on a MATLAB/Simulink program. The system consists mainly of restrictors, supply lines, a reservoir pressurization unit, a reservoir relief valve and a hydraulic reservoir. Each component is described by an independent model block. The different flow resistances are based on analytical functions or characteristic maps. Inside the supply lines heat transfer via the duct wall respectively the insulation takes place.
Weak Measurement of Superconducting Qubit Reconciles Incompatible Operators
Creators: name: Monroe, Jonathan T.
name: Halpern, Nicole Yunger
name: Lee, Taeho
name: Murch, Kater W.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Traditional uncertainty relations dictate a minimal amount of noise in incompatible projective quantum measurements. However, not all measurements are projective. Weak measurements are minimally invasive methods for obtaining partial state information without projection. Recently, weak measurements were shown to obey an uncertainty relation cast in terms of entropies. We experimentally test this entropic uncertainty relation with strong and weak measurements of a superconducting transmon qubit. A weak measurement, we find, can reconcile two strong measurements' incompatibility, via backaction on the state. Mathematically, a weak value -- a preselected and postselected expectation value -- lowers the uncertainty bound. Hence we provide experimental support for the physical interpretation of the weak value as a determinant of a weak measurement's ability to reconcile incompatible operations.
description: Published version
Are monetary policies and performances converging?
Creators: name: THYGESEN, N.
Publisher: name: PSL Quarterly Review
Year: 2013
Subjects: subject: EMS, policy, monetarism, performance, European integration
subject: E42, E52, F36

description: This paper was presented at the Fourth International Seminar on European Economic and Monetary Union, held in Copenhagen in March of 1981. The work provides a tentative assessment of the EMS in terms of the main internal and external motives which emerged from the discussions in 1978. Commentary on the main criticisms made by economists of a monetarist orientation is then provided. Finally, policy objectives and performance in 1979-80 in the individual countries are surveyed. JEL: E42, E52, F36
description: PSL Quarterly Review, V. 34, N. 138 (1981)
FLECS : Funktionale Modellbibliothek des Environment Control Systems ; Abschlussbericht
Creators: name: Scholz, Dieter
name: Müller, Christian
Publisher: name: HAW Hamburg
Year: 2008
Subjects: subject: Luftfahrt
subject: Flugzeug
subject: System
subject: Klimaanlage
subject: ECS
subject: Kabine
subject: Simulation
subject: Modellbibliothek
subject: MATLAB
subject: Simulink
subject: Atmosphäre
subject: Massenstrom
subject: Druck
subject: Strömungswiderstand
subject: Quelle
subject: Senke
subject: Volumen
subject: Kabinenmodelle
subject: Mischkammern
subject: Wärmetauscher
subject: Kühlaggregat
subject: Stauluft
subject: Kaltdampfklimasystem
subject: Sensor
subject: Regler
subject: FLECS
subject: Airbus
subject: 620: Ingenieurwissenschaften

description: Beim Projekt FLECS (Funktionale Modellbibliothek des Environment Control Systems, oder: Functional Library of the Environment Control System) handelte es sich um ein Verbundvorhaben von drei Partnern: Hochschule für Angewandte Wissenschaften Hamburg (HAW), CeBeNetwork GmbH, Bremen (CBN), Airbus Deutschland GmbH, Hamburg (AD). Federführend innerhalb des FLECS Projekts war die HAW Hamburg. Die Leistungen sind bis zum 15.10.2007 zu erbringen. Ein Abschlussbericht ist bis zum 15.01.2008 zu erstellen. "FLECSFortführung" wird von Airbus finanziert und hat eine Laufzeit bis zum 15.03.2008. Dieser Abschlussbericht zu FLECS berichtet nicht über "FLECS-Fortführung". Die FLECS-Datenbank besteht aus der thermodynamischen und strömungsmechanischen Beschreibung von Volumen und Strömungswiderständen. Neben den Volumenelementen wurde eine Formulierung für einen Massenstromknoten entwickelt. Die allgemeinen Strömungswiderstände beinhalten Ventile, die auch eine Behandlung von kompressiblen Strömungen zulassen. Innerhalb jeder Komponente wird ein Gas-Luftgemisch bezüglich der Anteile trockener Luft, Wasserdampf, CO2-Gehalt und flüssigem Wasser klassifiziert. Die FLECS-Datenbank besteht aus diesen Komponentenklassen: Umgebungsbedingungen, Randbedingungen Flugzeug, Strömungswiderstände, Massenstrom- und Druckquellen, Allgemeine Volumen, Kabinenmodelle, Mischkammern, Wärmetauscher, Kühlaggregat, Stauluft, Kaltdampfklimasysteme (FLECS-Fortführung), Sensoren sowie diverse Regler.
Are monetary policies and performances converging? A comment
Creators: name: RIEKE, W.
Publisher: name: PSL Quarterly Review
Year: 2013
Subjects: subject: EMS, policy, monetarism, performance, European integration
subject: E42, E52, F36

description: A brief comment on Niels Thygesen’s Are monetary policies and performances converging? JEL: E42, E52, F36
description: PSL Quarterly Review, V. 34, N. 138 (1981)
Mod $p$ and torsion homology growth in nonpositive curvature
Creators: name: Avramidi, Grigori
name: Okun, Boris
name: Schreve, Kevin
Publisher: name: arXiv
Year: 2020
Subjects: subject: Group Theory (math.GR)
subject: Geometric Topology (math.GT)
subject: FOS: Mathematics

description: We compute the mod $p$ homology growth of residual sequences of finite index normal subgroups of right-angled Artin groups. We find examples where this differs from the rational homology growth, which implies the homology of subgroups in the sequence has lots of torsion. More precisely, the homology torsion grows exponentially in the index of the subgroup. For odd primes $p$, we construct closed locally CAT(0) manifolds with nonzero mod $p$ homology growth outside the middle dimension. These examples show that Singer's conjecture on rational homology growth and Lück's conjecture on torsion homology growth are incompatible with each other, so at least one of them must be wrong.
description: Added Corollary 10, minor changes
On the equivalence of N=1 brane worlds and geometric singularities with flux
Creators: name: Kaste, Peter
name: Partouche, Herve
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider Kaluza Klein reductions of M-theory on the Z_N orbifold of the spin bundle over S^3 along two different U(1) isometries. The first one gives rise to the familiar ``large N duality'' of the N=1 SU(N) gauge theory in which the UV is realized as the world-volume theory of N D6-branes wrapped on S^3, whereas the IR involves N units of RR flux through an S^2. The second reduction gives an equivalent version of this duality in which the UV is realized geometrically in terms of an S^2 of A_{N-1} singularities, with one unit of RR flux through the S^2. The IR is reached via a geometric transition and involves a single D6 brane on a lens space S^3/Z_N or, alternatively, a singular background (S^2\times R^4)/Z_N, with one unit of RR flux through S^2 and, localized at the singularities, an action of their stabilizer group in the U(1) RR gauge bundle, so that no massless twisted states occur. We also consider linear sigma-model descriptions of these backgrounds.
description: 25 pages, LaTeX; v2: one reference added, published version
The European monetary system – managing the external relationships
Creators: name: LANGUETIN, P.
Publisher: name: PSL Quarterly Review
Year: 2013
Subjects: subject: ECU, dollar, EMS, U.S., cooperation, Europe
subject: E42, F36

description: This paper was presented at the Fourth International Seminar on European Economic and Monetary Union, held in Copenhagen in March of 1981. The work points out encouraging signs of improved cooperation between US and European authorities on coordinated interventions which developed in 1980. However, the author sees possible further scope for improvement in the idea of Jacques van Ypersele to set-up dollar/ECU swap arrangements between the European Monetary Cooperation Fund and the Federal Reserve. JEL: E42, F36
description: PSL Quarterly Review, V. 34, N. 138 (1981)
Production from Muschelkalk carbonates (Triassic, NE Netherlands) - Unique play or overlooked opportunity?
Creators: name: M. PÖPPELREITER
name: R. BORKHATARIA
name: T. AIGNER
name: K. PIPPING
Publisher: name: Geological Society of London
Year: 2020
Subjects: subject: Geology
subject: FOS: Earth and related environmental sciences

description: producing hydrocarbons onshore the Netherlands. This paper aims at comprehensively describing these relatively unknown reservoirs and speculating on additional play potential outside of the current production areas. The Muschelkalk formation consists of partially porous Lower and Upper Muschelkalk carbonates separated by tight Middle Muschelkalk evaporites. The 100 meter thick Lower Muschelkalk holds 1.9 bcm gas in the De Wijk field. The reservoir is a limestone-dolomite-marl succession producing from several decimetres thick calcisilitic dolo-mudstones encased in tight lime-mudstones. The reservoir shows a layer-cake-type architecture composed of sixteen cycles with thin, but laterally continuous porous units. Good reservoir facies is concentrated in the upper third of these cycles. Porosities vary from 6 to 27%, (average of 12%) and permeabilities range from 0.01 to 32 mD (average 0.06 mD). The reservoir rocks represent inner ramp sediments of a storm-dominated epeiric ramp. The 50 metres thick Upper Muschelkalk contains 0.8 bcm gas in the Coevorden Muschelkalk field. The reservoir consists of decimeters thick peloidal-oolitic dolo-grain- to packstones of good permeability interbedded with lower permeable dolo-mudstones to wackestones. Porosity varies from 5 to 29% (average 15%) and permeability ranges from 0.01 to 57 mD (av. 1 mD). The permeable dolo-grainstones occur chiefly around peak transgression and early regression of the Upper Muschelkalk. The producing Upper Muschelkalk deposits represent the inner ramp section of a storm-dominated homoclinal ramp. Numerous gas shows in the Lower and Upper Muschelkalk, scattered over the onshore territory of the Netherlands, suggest missed-pay and possible upside potential. The highest reservoir potential occurs in grainy dolomitic inner ramp deposits. In Holland these are likely located close to the existing fields. Additional, currently unrecognized potential could be present in Southern Germany and Eastern Poland.
Bernstein spectral method for quasinormal modes and other eigenvalue problems
Creators: name: Fortuna, Sean
name: Vega, Ian
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Computational Physics (physics.comp-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Spectral methods are now common in the solution of ordinary differential eigenvalue problems in a wide variety of fields, such as in the computation of black hole quasinormal modes. Most of these spectral codes are based on standard Chebyshev, Fourier, or some other orthogonal basis functions. In this work we highlight the usefulness of a relatively unknown set of non-orthogonal basis functions, known as Bernstein polynomials, and their advantages for handling boundary conditions in ordinary differential eigenvalue problems. We also report on a new user-friendly package, called \texttt{SpectralBP}, that implements Berstein-polynomial-based pseudospectral routines for eigenvalue problems. We demonstrate the functionalities of the package by applying it to a number of model problems in quantum mechanics and to the problem of computing scalar and gravitational quasinormal modes in a Schwarzschild background. We validate our code against some known results and achieve excellent agreement. Compared to continued-fraction or series methods, global approximation methods are particularly well-suited for computing purely imaginary modes such as the algebraically special modes for Schwarzschild gravitational perturbations.
description: 46 pages, 9 figures added references, changed format, reorganized sections to enhance flow of discussions, improved the subsection discussing the subtleties in computing the ASM, strengthened discussion on the QHO, edits to graphs so that they are readable in black and white, fixed some typos
From monetary to exchange rate targets
Creators: name: ARTIS, M.J.
Publisher: name: PSL Quarterly Review
Year: 2013
Subjects: subject: EMS, prices, European integration, exchange rate target, monetary target
subject: E24, F36

description: This paper was presented at the Fourth International Seminar on European Economic and Monetary Union, held in Copenhagen in March of 1981. The author takes up the theoretical issues in the framework of both static and dynamic analysis. He argues, on the basis of the criterion of minimising the variance of prices around their target value, that an exchange-rate target outperforms a monetary target under most conceivable types of disturbances in a static analysis. JEL: E24, F36
description: PSL Quarterly Review, V. 34, N. 138 (1981)
Winter use and habitat selection of moose in openings and adjacent upland forested habitats
Creators: name: Catton, Robert Bruce
Publisher: name: University of British Columbia
Year: 2011

description: Two designs were developed to model and compare the effects of scale on resource utilization by moose in a managed lodgepole pine (Pinus contorta) forest. Statistical models, based on population and individual design levels (using microsite and moderate polygon habitat scales, respectively), were used to 1) test the hypotheses that moose track presence was increased i) in openings of increasing shrub cover, ii) in forests adjacent to openings of increasing shrub cover, 2) model moose utilization of forest cover, based on distance-from-nearest-opening, to determine appropriate leave strip widths adjacent to openings used by moose, 3) further understanding of how different opening and forest cover types influence moose presence and utilization and 4) compare these results from the different designs. Moose track occurrence and habitat attributes were recorded on 55 snow track transects to model moose presence as a function of distance-from- opening-edge and variation in vegetation cover. Over 15,000 UTM relocations were obtained from 15 GPS collared cow moose over two winters, in the same area. Based on track transect data, the model containing bog birch (Betula glandulosa), Salix species and mean shrub height was the best predictor of moose presence. Resource utilization functions indicated natural and forest management openings, up to 40 years old, were utilised more than older forest habitats. Modeling at both scales confirmed the use of early seral openings (natural or harvested) and indicated that forested distance-from-an-opening-edge does not influence resource utilization or presence of moose. Track presence was greater in wetlands with average shrub cover between 6 - 20% and > 20% than within adjacent forest cover but there was no difference between wetlands with shrub cover < 6% and adjacent forest cover. Tracks were more numerous in forest cover adjacent to wetlands with shrub cover > 20% than in forest cover adjacent to wetlands with shrub cover < 6% and 6 - 20%. The study implies that leave strips may have little immediate effect on the use of early seral openings by moose in winter although, this does not rule out that climate, predation or hunting pressure will influence habitat selection in the future.
Implantación de la trazabilidad y su relación con la calidad: marco conceptual y retos estratégicos. Aplicación al sector pesquero
Creators: name: Calvo-Dopico, D.
name: Calvo-Dopico, D.
Publisher: name: Unknown
Year: 2015
Subjects: subject: Agribusiness
subject: Agricultural and Food Policy
subject: Institutional and Behavioral Economics
subject: Resource /Energy Economics and Policy
subject: Cadena de valor
subject: calidad
subject: comportamiento del consumidor
subject: productos de pesca
subject: trazabilidad.

description: El objetivo de este trabajo es proponer un marco conceptual que facilite a las empresas la implantación de la trazabilidad en el sector pesquero y permita aprovechar al máximo todas sus oportunidades. El marco conceptual propuesto está fundamentado en crear redes de cooperación entre los agentes de la cadena de valor. La creación de este tipo de redes no solo facilitaría la creación de cadenas de valor más seguras sino también permitiría informar al consumidor sobre las propiedades intrínsecas relevantes que dotan de calidad al producto (ej. origen). En cuanto a la señalización de la trazabilidad, se demanda la creación de indicadores claros, creíbles y fáciles de utilizar por el consumidor. Por último, se hace necesario mejorar el proceso de autenticación o verificación de las propiedades intrínsecas en los puntos críticos de la cadena de valor.
La protección medioambiental como criterio en la selección de inversiones socialmente responsables: una aproximación multicriterio
Creators: name: García-Bernabeu, A.
name: Pla-Santamaria, D.
name: Bravo, M.
name: Pérez-Gladish, B.
name: García-Bernabeu, A.
name: Pla-Santamaria, D.
name: Bravo, M.
name: Pérez-Gladish, B.
Publisher: name: Unknown
Year: 2015
Subjects: subject: Environmental Economics and Policy
subject: Research Methods/ Statistical Methods
subject: Inversión socialmente responsable
subject: medioambiente
subject: modelos multicriterio
subject: selección de inversiones

description: La mayor concienciación medioambiental y ética de empresas y organizaciones se traslada también a la selección de carteras. En esta nota se propone un modelo multicriterio de programación por metas para la selección de carteras incorporando a los criterios clásicos financieros, criterios mediambientales.
description: Note
Memory effects on the statistics of fragmentation
Creators: name: Araripe, L. E.
name: Andrade, J. S.
name: Filho, R. N. Costa
Publisher: name: arXiv
Year: 2004
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We investigate through extensive molecular dynamics simulations the fragmentation process of two-dimensional Lennard-Jones systems. After thermalization, the fragmentation is initiated by a sudden increment to the radial component of the particles' velocities. We study the effect of temperature of the thermalized system as well as the influence of the impact energy of the ``explosion'' event on the statistics of mass fragments. Our results indicate that the cumulative distribution of fragments follows the scaling ansatz $F(m)\propto m^{-α}\exp{[-(m/m_0)^γ]}$, where $m$ is the mass, $m_0$ and $γ$ are cutoff parameters, and $α$ is a scaling exponent that is dependent on the temperature. More precisely, we show clear evidence that there is a characteristic scaling exponent $α$ for each macroscopic phase of the thermalized system, i.e., that the non-universal behavior of the fragmentation process is dictated by the state of the system before it breaks down.
description: 5 pages, 8 figures
Cores from the Atlantic Field, Kopervik Fairway, Outer Moray Firth, UK
Creators: name: J. ARGENT
name: R. BLIGHT
name: P. COX
name: R. HARDY
name: A. LAW
name: J. R. SMALLWOOD
name: D. WALTER
Publisher: name: Geological Society of London
Year: 2020
Subjects: subject: Geology
subject: FOS: Earth and related environmental sciences

description: At first sight the 'tank of sand' provided by the Kopervik/Captain Sandstone Member reservoir of the Atlantic Field is a development geologist's and reservoir engineer's dream. However, the challenges posed are several: (1) The top of the reservoir is not generally visible on seismic data, hence geologically derived isopachs are important in creating top structure maps. The isopachs are best controlled by mapping individual sand units; however distinguishing between these units is difficult even in core, let alone on log data. Petrography, textural characteristics, palaeomagnetically derived flow directions, heavy minerals, biostratigraphy, and geological models developed from other discoveries along the Kopervik fairway indicate that the sands may be deposited by a mixture of the 'sausage' and 'sock' mechanisms of Law et al (2000). (2) The 'tank' may be subdivided by permeability barriers or baffles in the form of thin shale units or cemented zones. Atlantic Field will be developed with only two wells so these barriers may prove significant and it is important, although difficult, to predict their locations and lateral extents. (3) The high-permeability (multi-darcy) reservoir, together with the thin hydrocarbon column and active aquifer, mean that development wells must be designed to prevent early catastrophic water breakthrough. Accurately drilling such wells will not be easy when the reservoir cannot easily be resolved on seismic data, mapped or depth converted.
Additively manufactured hybrid anisotropic pentamode metamaterials
Creators: name: Mohammadi, Kaivan
name: Movahhedy, Mohammad R.
name: Shishkovsky, Igor
name: Hedayati, Reza
Publisher: name: arXiv
Year: 2020
Subjects: subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: Pentamode metamaterials are a type of extremal designer metamaterials which are able to demonstrate high rigidity in one direction and extremely high compliance in other directions. Pentamodes can, therefore, be considered as building blocks of exotic materials with any arbitrarily selected thermodynamically admissible elasticity tensor. The pentamode lattices can then be envisioned to be combined to construct intermediate extremal materials such as quadramodes, trimodes, and bimodes. In this study, we constructed several primary types of anisotropic pentamode lattices (with midpoint positioning of 10%, 15%, 20%, 25%, 30%, 35%, and 42% of the main unit cell diagonal) and then combined them mutually to explore the dependence of elastic properties of hybrid pentamodes on those of individual constructing lattices. Several anisotropic individual and hybrid pentamode lattice structures were produced using MultiJet Additive Manufacturing technique and then mechanically tested under compression. Finite element models were also created using COMSOL Multiphysics package. Two-component hybrid pentamode lattices composed of individual lattices with extensively different (as large as of 2 order of magnitudes) FOM ratios were constructed and analysed. It was demonstrated that it is possible to design and construct composite intermediate extremal materials with arbitrary eigen values in the elastic tensor. It is concluded that the elastic E, shear G, and bulk moduli B of the hybrid structure are the superpositions of the corresponding moduli of the individual lattice structures. The Poisson's ratio of the hybrid pentamode structure equals that of individual structure with higher Poisson's ratio. The yield stress of the hybrid pentamode lattice structure depends on the elastic moduli of the constructing lattice structures as well as yield stress of the weaker lattice structure.
Programación y compromiso. Cómo equilibrar dos objetivos, económico y ambiental, en una promoción de viviendas
Creators: name: Guadalajara-Olmeda, N.
name: Rua-Aguilar, M. Jose
name: Guadalajara-Olmeda, N.
name: Rua-Aguilar, M. Jose
Publisher: name: Unknown
Year: 2015
Subjects: subject: Environmental Economics and Policy
subject: Research Methods/ Statistical Methods
subject: Construcción
subject: costes
subject: eficiencia energética
subject: programación compromiso

description: En la construcción de edificios entran en conflicto el objetivo económico para el usuario y el objetivo ambiental para la sociedad. La aplicación de la metodología multiobjetivo y programación compromiso puede ser útil para definir la composición óptima de viviendas en una promoción, considerando las distintas calificaciones energéticas
description: Note
From monetary to exchange rate targets. A comment
Creators: name: DORNBUSH, R.
Publisher: name: PSL Quarterly Review
Year: 2013
Subjects: subject: EMS, European integration, exchange rate and monetary rules
subject: E42, E52, F36

description: A brief comment on M.J. Artis’ From monetary to exchange rate targets. The author qualifies some of the conclusions of the static model, highlights some of the different lessons of the transition problem and offers a somewhat different perspective on the longer term choice between exchange rate and monetary rules. JEL: E42, E52, F36
description: PSL Quarterly Review, V. 34, N. 138 (1981)
Decomposition of Feynman Integrals by Multivariate Intersection Numbers
Creators: name: Frellesvig, Hjalte
name: Gasparotto, Federico
name: Laporta, Stefano
name: Mandal, Manoj K.
name: Mastrolia, Pierpaolo
name: Mattiazzi, Luca
name: Mizera, Sebastian
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present a detailed description of the recent idea for a direct decomposition of Feynman integrals onto a basis of master integrals by projections, as well as a direct derivation of the differential equations satisfied by the master integrals, employing multivariate intersection numbers. We discuss a recursive algorithm for the computation of multivariate intersection numbers and provide three different approaches for a direct decomposition of Feynman integrals, which we dub the straight decomposition, the bottom-up decomposition, and the top-down decomposition. These algorithms exploit the unitarity structure of Feynman integrals by computing intersection numbers supported on cuts, in various orders, thus showing the synthesis of the intersection-theory concepts with unitarity-based methods and integrand decomposition. We perform explicit computations to exemplify all of these approaches applied to Feynman integrals, paving a way towards potential applications to generic multi-loop integrals.
description: 53 Pages, references added; matches published version
Plausible physical mechanisms for unusual volatile/non-volatile resistive switching in HfO2-based stacks
Creators: name: Quinteros, Cynthia P.
name: Antoja-Lleonart, Jordi
name: Noheda, Beatriz
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Memristive devices made of silicon compatible simple oxides are of great interest for storage and logic devices in future adaptable electronics and non-digital computing applications. A series of highly desirable properties observed in an atomic-layer-deposited hafnia-based stack, triggered our interest to investigate their suitability for technological implementations. In this paper, we report our attempts to reproduce the observed behaviour within the framework of a proposed underlying mechanism. The inability of achieving the electrical response of the original batch indicates that a key aspect in those devices has remained undetected. By comparing newly made devices with the original ones, we gather some clues on the plausible alternative mechanisms that could give rise to comparable electrical behaviours.
Mid-infrared sources in the ELAIS Deep X-ray Survey
Creators: name: Manners, J. C.
name: Serjeant, S.
name: Bottinelli, S.
name: Vaccari, M.
name: Franceschini, A.
name: Perez-Fournon, I.
name: Gonzalez-Solares, E.
name: Willott, C. J.
name: Johnson, O.
name: Almaini, O.
name: Rowan-Robinson, M.
name: Oliver, S.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present a cross-correlation of the European Large Area ISO survey (ELAIS) with the ELAIS Deep X-ray Survey of the N1 and N2 fields. There are 7 Chandra point sources with matches in the ELAIS Final Analysis 15um catalogue, out of a total of 28 extragalactic ISO sources present in the Chandra fields. Five of these are consistent with AGN giving an AGN fraction of ~19 per cent in the 15um flux range 0.8-6 mJy. We have co-added the hard X-ray fluxes of the individually-undetected ISO sources and find a low significance detection consistent with star formation in the remaining population. We combine our point source cross-correlation fraction with the XMM-Newton observations of the Lockman Hole and Chandra observations of the Hubble Deep Field North to constrain source count models of the mid-infrared galaxy population. The low dust-enshrouded AGN fraction in ELAIS implied by the number of cross-identifications between the ELAIS mid-infrared sample and the Chandra point sources is encouraging for the use of mid-infrared surveys to constrain the cosmic star formation history, provided there are not further large undetected populations of Compton-thick AGN.
description: 9 pages, 6 figures, MNRAS accepted
E-commerce et son enseignement-apprentissage aux humanités techniques commerciales et gestion en RDC
Creators: name: Albert Daddy BITSHILUALUA NKASHAMA
name: Josué MULUMBA NSAMBUKA
name: Prince  NGOY KALALA
name: Cocco Olivier KALUBI MUBENGA
name: Nico BANZA MUTAMBAYI
Publisher: name: Zenodo
Year: 2024

description: ce papier porte sur l’e-commerce et son enseignement-apprentissage aux humanités techniques commerciales et gestion en RD Congo. Cette étude consiste à chercher les notions essentielles de la vente en ligne ainsi que la manière d’enseigner ces notions qui ne font pas l’objet dans l’actuel programme de l’éducation nationale de la RDC.

L’essor rapide de technologies numériques et l’expansion du commerce en ligne transforme de manière significative le paysage économique mondial. En RDC malgré la formation des élèves en science commerciale, le curriculum scolaire reste largement axé sur les pratiques de ventes en présentiel.

Pour réaliser cette étude deux méthodes suivantes ont été utilisé :

-                Méthode analytique qui nous a permis d’analyser le curriculum de formation des études commerciales de l’enseignement secondaire,

-                Méthode descriptive ou statistique qui nous a servi de décrire les facteurs occasionnant l’affiliation les notions e-commerce qui manquent dans ce curriculum et ceci à l’aide du logiciel STATA 15.  

Ces deux méthodes sont accompagnées de techniques d’enquêtes de terrain avec un questionnaire, de technique documentaire et de technique statistique.
The European Monetary System: the first two years – concluding remarks
Creators: name: TRIFFIN, R.
Publisher: name: PSL Quarterly Review
Year: 2013
Subjects: subject: EMS, European integration
subject: E42, F36

description: The experiences with the European Monetary System during its first two years was the subject of the fourth and final seminar in a series organised by Robert Triffin under a grant from the Ford Foundation. While the first three seminars had been largely forward looking, the main purpose of the final seminar was to evaluate how the EMS had actually work. In his concluding remarks to the seminar, Robert Triffin offers some brief personal conclusions. JEL: E42, F36
description: PSL Quarterly Review, V. 34, N. 138 (1981)
title: Patients centred pharmacovigilance
Creators: name: Scurti, Veronica
Publisher: name: The Open University
Year: 2012

description: In recent years, periodically high peaks of attention and publications have documented severe adverse reactions to new molecules, which have raised many questions about the efficacy- efficiency of traditional methodological tools of phannacovigilance, as well as about the role of regulatory systems. Drugs cannot be considered as an independent variable: the evaluation of all of their effects must take into account the real context in which they are used, and in which they are expected have a role, not only in terms of efficacy, but also of tolerability and safety. Specific emphasis is given to recent and promising developments, which are focused on the participation of patient populations as key actors in producing knowledge that can also technically integrate what has been produced so far, and can allow the evolution of surveillance from a role of control to one of the promotion of rights. The replacement of phannacovigilance in an epidemiological context is the main aim of this project. This is applied across the development of various projects realised in different scenarios (e.g. hospital, community) using different methodologies (e.g. administrative database linkage, prospective studies, qualitative projects), and through the direct involvement of all of the actors involved in the process of care (e.g. clinicians, general practitioners, patients). In particular, despite the many recommendations, patient participation can be considered as an exception in the health care setting: for this reason the project was developed with the intention to give voice to patients. Promotion of the use of a more narrative style between health professionals and citizen-patients in phannacovigilance should be considered the most important outcome of a renewed phannacovigilance.
Effect of AC-Stark shift in optical dipole trap on absorption imaging of trapped atoms
Creators: name: Bhardwaj, K
name: Ram, S P
name: Singh, S
name: Tiwari, V B
name: Mishra, S R
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: In the present work, the effect of AC-Stark shift (i.e. light-shift) in optical dipole trap on in-situ absorption probe imaging of the trapped atoms has been investigated. We have calculated the light-shift of various energy levels of $^{87}$Rb atoms relevant for trapping in an optical dipole trap (ODT). The spatial varying intensity of the ODT beam results in position dependent light-shift (i.e. AC-Stark shift). Such modifications in the energy levels of the atom result in modification in the absorption cross-section, which finally modifies the optical density (OD) in in-situ absorption imaging at a given wavelength of imaging probe beam. Incorporating the light-shift in analysis of images, the correct number of atoms in the optical dipole trap has been estimated for the experimentally observed absorption images of the trapped cloud. The in-situ imaging and this work can be useful in estimating the instantaneous loss rate from the trap during the evaporative cooling of trapped atom cloud.
description: 12 pages, 8 figures, 1 table
title: Durchstanzen von Flachdecken : vergleichende Untersuchungen von Flachdeckensystemen
Creators: name: Weger, Thomas
Publisher: name: TU Wien
Year: 2014
Subjects: subject: Durchstanzen
subject: Flachdecken
subject: punching shear
subject: flat slab

description: Das Ziel dieser Diplomarbeit besteht in der Beschreibung, Berechnung sowie Analyse des Tragverhaltens von Durchstanzen bei Innen-, Rand- und Eckstützen. Darüber hinaus wird einerseits auf die verschiedenen Durchstanzbewehrungsformen eingegangen und diese sowohl berechnet als auch miteinander verglichen und andererseits Maßnahmen zur nachträglichen Verstärkung von durchstanzgefährdeten Flachdecken erläutert. Zudem werden mittels einer vergleichenden Untersuchung, in der 21 Flachdeckensysteme mit variablen Eingangsparametern wie der statischen Nutzhöhe, der Stützweite, der Betongüte, des Bewehrungsgrades, der Durchstanzbewehrungsform und des Randabstandes analysiert werden, der Zusammenhang zwischen einzelnen Parametern sowie sich aufgrund dessen ergebende Auswirkungen analysiert.
description: The aim of this thesis is to describe, calculate and analyze the structural behavior of punching shears used with interior, edge and corner columns. Furthermore, various forms of punching shear reinforcements are being described, calculated and analyzed. Measures for subsequent amplification of punching shear endangered flat slabs are specified. In addition, the thesis contains a comparative study in which 21 flat ceiling systems with variable input parameters such as the static effective height, the span, the concrete quality, the level of reinforcement, the punching shear reinforcement shape and the edge distance are being analyzed. Finally, these outcomes and the correlation between each of the parameters is being depicted.
Adversarial Attack Based Countermeasures against Deep Learning Side-Channel Attacks
Creators: name: Gu, Ruizhe
name: Wang, Ping
name: Zheng, Mengce
name: Hu, Honggang
name: Yu, Nenghai
Publisher: name: arXiv
Year: 2020
Subjects: subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences

description: Numerous previous works have studied deep learning algorithms applied in the context of side-channel attacks, which demonstrated the ability to perform successful key recoveries. These studies show that modern cryptographic devices are increasingly threatened by side-channel attacks with the help of deep learning. However, the existing countermeasures are designed to resist classical side-channel attacks, and cannot protect cryptographic devices from deep learning based side-channel attacks. Thus, there arises a strong need for countermeasures against deep learning based side-channel attacks. Although deep learning has the high potential in solving complex problems, it is vulnerable to adversarial attacks in the form of subtle perturbations to inputs that lead a model to predict incorrectly.
 In this paper, we propose a kind of novel countermeasures based on adversarial attacks that is specifically designed against deep learning based side-channel attacks. We estimate several models commonly used in deep learning based side-channel attacks to evaluate the proposed countermeasures. It shows that our approach can effectively protect cryptographic devices from deep learning based side-channel attacks in practice. In addition, our experiments show that the new countermeasures can also resist classical side-channel attacks.
Zn and Ni doping effects on the low-energy spin excitations in La$_{1.85}$Sr$_{0.15}$CuO$_{4}$
Creators: name: Kofu, M.
name: Kimura, H.
name: Hirota, K.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Impurity effects of Zn and Ni on the low-energy spin excitations were systematically studied in optimally doped La1.85Sr0.15Cu1-yAyO4 (A=Zn, Ni) by neutron scattering. Impurity-free La1.85Sr0.15CuO4 shows a spin gap of 4meV below Tc in the antiferromagnetic(AF) incommensurate spin excitation. In Zn:y=0.004, the spin excitation shows a spin gap of 3meV below Tc. In Zn:y=0.008 and Zn:y=0.011, however, the magnetic signals at 3meV decrease below Tc and increase again at lower temperature, indicating an in-gap state. In Zn:y=0.017, the low-energy spin state remains unchanged with decreasing temperature, and elastic magnetic peaks appear below 20K then exponentially increase. As for Ni:y=0.009 and Ni:y=0.018, the low-energy excitations below 3meV and 2meV disappear below Tc. The temperature dependence at 3meV, however, shows no upturn in constrast with Zn:y=0.008 and Zn:y=0.011, indicating the absence of in-gap state. In Ni:y=0.029, the magnetic signals were observed also at 0meV. Thus the spin gap closes with increasing Ni. Furthermore, as omega increases, the magnetic peak width broadens and the peak position, i.e. incommensurability, shifts toward the magnetic zone center (pi pi). We interpret the impurity effects as follows: Zn locally makes a non-superconducting island exhibiting the in-gap state in the superconducting sea with the spin gap. Zn reduces the superconducting volume fraction, thus suppressing Tc. On the other hand, Ni primarily affects the superconducting sea, and the spin excitations become more dispersive and broaden with increasing energy, which is recognized as a consequence of the reduction of energy scale of spin excitations. We believe that the reduction of energy scale is relevant to the suppression of Tc.
description: 13pages, 14figures; submitted to Phys. Rev. B
Uso práctico de la distribución TSP en el método de valoración de las dos betas
Creators: name: Herrerías Pleguezuelo, R.
name: Herrerías Pleguezuelo, J.M.
name: Herrerías Pleguezuelo, R.
name: Herrerías Pleguezuelo, J.M.
Publisher: name: Unknown
Year: 2015
Subjects: subject: Research Methods/ Statistical Methods
subject: Risk and Uncertainty
subject: Distribución TSP
subject: incertidumbre
subject: método de valoración de las dos betas
subject: método PERT

description: Este trabajo tiene dos partes claramente diferenciadas. La primera se dedica a realizar una somera revisión de algunos de los trabajos relacionados con el método de valoración de las dos betas, MDB, ideado por Ballestero al comienzo de los años setenta del siglo anterior. En la segunda se presenta la distribución TSP, introducida por van Dorp y Kotz al comienzo de este siglo, y su uso como modelo probabilístico en el MDB, tanto para la variable índice de calidad del bien a valorar como para la variable valor de mercado del mencionado bien. Finalmente, se ilustra el MDB, con un caso práctivo de la literatura especializada, Ballestero y Rodríguez (1999).
description: Note
My work on international monetary problems. 1940-1964
Creators: name: MACHLUP, F.
Publisher: name: PSL Quarterly Review
Year: 2013
Subjects: subject: International monetary economics, Fritz Machlup
subject: B31, E40, F33

description: The article is a continuation of an earlier piece published in 1980 which surveyed the author’s publications during the years 1923 to 1940. In this second instalment the author again deals with international monetary economics, covering the years 1940 to 1964. JEL: B31, E40, F33
description: PSL Quarterly Review, V. 35, N. 140 (1982)
Rigid prices, flexible prices and inflation
Creators: name: SYLOS LABINI, P.
Publisher: name: PSL Quarterly Review
Year: 2013
Subjects: subject: Price level, raw materials, manufactures, labour market, flexibility
subject: E31

description: Although the concept of a general price level is of some limited use in purely statistical and descriptive studies, it is dangerous and deceptive in the field of theoretical analyses which aim at explaining price variations. Any fruitful analysis must distinguish between various types of markets and goods since, in the short and long run, the mechanisms of price formation and variation are dependent on such. In this work, the author devotes special attention to the dichotomy of raw materials and manufactures, a regards goods. Another dichotomy is introduced with reference to the labour market. The logical basis for the double dichotomy is given by the degree of flexibility, in relation to demand, of prices and earnings. JEL: E31
description: PSL Quarterly Review, V. 35, N. 140 (1982)
Forschungsdaten finden und nachnutzen
Creators: name: Strauch-Davey, Annette
Publisher: name: Zenodo
Year: 2021
Subjects: FDM
RDM
Forschungsdatenmanagement
Research Data Management
Kompetenzzentrum Forschungsdaten
UB Bielefeld
Open Science
FAIR
Metadaten

description: ONLINE Coffee Lecture: Forschungsdatenmanagement vom Mittwoch, 03. November 2021 um 12:30 Uhr. Forschungsdaten finden und nachnutzen.
Asymptotic behavior of Wronskian polynomials that are factorized via $p$-cores and $p$-quotients
Creators: name: Bonneux, Niels
Publisher: name: arXiv
Year: 2020
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics

description: In this paper we consider Wronskian polynomials labeled by partitions that can be factorized via the combinatorial concepts of $p$-cores and $p$-quotients. We obtain the asymptotic behavior for these polynomials when the $p$-quotient is fixed while the size of the $p$-core grows to infinity. For this purpose, we associate the $p$-core with its characteristic vector and let all entries of this vector simultaneously tend to infinity. This result generalizes the Wronskian Hermite setting which is recovered when $p=2$.
description: 22 pages, 15 figures
South Halibut Basin of the Moray Firth core displays
Creators: name: J. WILSON
name: G. WALL
name: H. J. KLOOSTERMAN
name: D. CONEY
name: G. CAYLEY
name: J. WALKER
name: C. LINSKAILL
Publisher: name: Geological Society of London
Year: 2020
Subjects: subject: Geology
subject: FOS: Earth and related environmental sciences

description: Three continuous sections of core are displayed - all interpreted to be the result of deep-water gravity-driven sedimentation (turbidity currents and debris flows). The upper section (12 ft) occurs in the middle of a 250 ft section of massive, relatively featureless sandstone interpreted to be dominated by high-density turbidites. These occur at the top of the Kopervik section and form the bulk of the gas/condensate-bearing reservoir. The 12 ft section illustrates both massive sandstone (most representative of the gross 250 ft upper section) and laminated sandstones, interpreted as the tails of lower-density turbitity currents. The lower continuous sections (24 ft and 36 ft respectively) contain more chaotic argillaceous material and are interpreted as comprising more locally derived debris-flows. This overall heterolithic section is interpreted as being relatively flat-lying and contains the fluid contacts in the core of the field. The impedance contrast near the top of the unit is interpreted to have generated the 'flat-event' interpreted as a direct hydrocarbon indicator pre-drill.