cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Effect of experimental parameters on optimal transmission of light through opaque media
Creators: name: Anderson, Benjamin R.
name: Gunawidjaja, Ray
name: Eilers, Hergen
Publisher: name: arXiv
Year: 2015
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Spatial light modulator (SLM) controlled transmission of light through opaque media is a relatively new experimental method with wide applications in various fields. While there has been a surge in research into the technique, there has been little work reported considering the effects of various experimental parameters on the efficiency of optimization. In this study, we explore the effects of various experimental conditions on optimization and find that the intensity enhancement depends on the number of modulated channels, number of phase steps, feedback integration radius, beam spot size, and active SLM area. We also develop a model, based on the propagation of a Gaussian beam with a random phase front, to account for most of the measured effects.
description: 12 pages, 14 figures
Observation of Devil's Staircase in the Novel Spin Valve System SrCo$_6$O$_{11}$
Creators: name: Matsuda, T.
name: Partzsch, S.
name: Tsuyama, T.
name: Schierle, E.
name: Weschke, E.
name: Geck, J.
name: Saito, T.
name: Ishiwata, S.
name: Tokura, Y.
name: Wadati, H.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Using resonant soft x-ray scattering as a function of both temperature and magnetic field, we reveal a large number of almost degenerate magnetic orders in SrCo6O11. The Ising-like spins in this frustrated material in fact exhibit a so-called magnetic devil's staircase. It is demonstrated how a magnetic field induces transitions between different microscopic spin configurations, which is responsible for the magnetoresistance of SrCo6O11. This material therefore constitutes a unique combination of a magnetic devil's staircase and spin valve effects, yielding a novel type of magnetoresistance system.
description: 5 pages, 5 figures
title: แบบประเมินความกังวลต่อความตาย   (Death anxiety self assessment survey (in Thai))
Creators: name: Phenwan, Tharin
name: Jarusomboon, Wanna
name: Sittiwantana, Ekkapop
Publisher: name: University of Dundee
Year: 2023
Subjects: classificationCode: 3
subject: FOS: Medical and health sciences

description: A template of self assessment death anxiety survey in the Thai language. The template was used as a part of project from 2019-2021 to determine participants' death anxiety before and after the project. The project was funded by the Thai Health Promotion Foundation under Grant no. 62-01611, 63-01629 and 64-00937.
Thermal instability in a weakly ionized plasma
Creators: name: Lesch, H.
name: Stiele, H.
name: Heitsch, F.
Publisher: name: Blackwell Publishing Ltd
Year: 2006

description: We revisit the problem of clump formation due to thermal instabilities in a weakly ionized plasma with the help of a linear perturbation analysis, as discussed by Nejad-Asghar & Ghanbari. In the absence of a magnetic field and ambipolar diffusion the characteristic equation reduces to the thermal instability described by Field. We derive the critical wavelengths, which separate the spatial ranges of stability and instability. Contrary to the original analysis of Nejad-Asghar & Ghanbari, perturbations with a wavelength larger than the critical wavelength destabilize the cloud. Moreover, the instability regime of isentropic perturbations is drastically reduced. Isobaric modes with real values of the critical wavelength appear only if the density dependence of the cooling rate is more pronounced than the temperature dependence. Isentropic modes arise only if the power of the density in the cooling rate is smaller than 1/2, which is not fulfilled for CO cooling. We find that ambipolar diffusion is not a dominating heating process in molecular gas.
Formation of structure in molecular clouds: A case study
Creators: name: Heitsch, F.
name: Burkert, A.
name: Devriendt, J.E.G.
name: Hartmann, L.W.
name: Slyz, A.D.
Publisher: name: Institute of Physics Publishing
Year: 2005

description: Molecular clouds (MCs) are highly structured and turbulent. Colliding gas streams of atomic hydrogen have been suggested as a possible source of MCs, imprinting the filamentary structure as a consequence of dynamical and thermal instabilities. We present a two-dimensional numerical analysis of MC formation via converging H I flows. Even with modest flow speeds and completely uniform inflows, nonlinear density perturbations arise as possible precursors of MCs. Thus, we suggest that MCs are inevitably formed with substantial structure, e.g., strong density and velocity fluctuations, which provide the initial conditions for subsequent gravitational collapse and star formation in a variety of Galactic and extragalactic environments.
V-variable image compression
Creators: name: Mendivil, Franklin
name: Stenflo, Örjan
Publisher: name: arXiv
Year: 2014
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences
subject: 28A80, 68U10, 94A08

description: V-variable fractals, where $V$ is a positive integer, are intuitively fractals with at most $V$ different "forms" or "shapes" at all levels of magnification. In this paper we describe how V-variable fractals can be used for the purpose of image compression.
description: 15 pages, 22 figures
title: Real-Time Communication in the Algorithm to Architecture Mapping Model
Creators: name: Varma, Somesh M.
Publisher: name: Old Dominion University
publisherIdentifier: https://ror.org/04zjtrb98
publisherIdentifierScheme: ROR
Year: 1995

description: The objective of this thesis is to analyze schedules of communication resources to obtain deterministic and contention-free communication in the Algorithm To Architecture Mapping Model (ATAMM). In ATAMM, performance must be deterministic to guarantee meeting deadlines. It is difficult to achieve deterministic performance in the presence of contention during communication. This thesis develops new data-flow models to study and analyze different schedules of communication resources to achieve deterministic and contention-free communication. These models are the Synchronous Communication Marked Graph (SCMG) and the Asynchronous Communication Marked Graph (ACMG). The SCMG is based on message passing synchronous communication. It defines schedules for synchronous communication resources to define serial communication and then to define synchronous communication between functional units for the given AMG. It also defines processing of the AMG node. The ACMG is based on the asynchronous message passing communication. It also defines the same objects but for asynchronous communication. The models are implemented in the AT AMM tools to satisfy AT AMM conditions for hard real-time systems.
Symmetry Improved 2PI Effective Action and the Infrared Divergences of the Standard Model
Creators: name: Pilaftsis, Apostolos
name: Teresi, Daniele
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Resummations of infinite sets of higher-order perturbative contributions are often needed both in thermal field theory and at zero temperature. For instance, the behaviour of the Standard Model (SM) effective potential extrapolated to very high energies is known to be extremely sensitive to higher-order effects. The 2PI effective action provides a systematic approach to consistently perform such resummations. However, one of its major limitations was that its loopwise expansion introduces residual violations of possible global symmetries, thus giving rise to massive Goldstone bosons in the spontaneously broken phase of the theory. We review the recently developed symmetry-improved 2PI formalism for consistently encoding global symmetries in the 2PI approach, and discuss its satisfactory field-theoretical properties. We then apply the formalism to study the infrared divergences of the SM effective potential due to Goldstone bosons, which may affect the stability analyses of the SM. We present quantitative comparisons, for the scalar sector of the SM, with the approximate partial resummation procedure recently developed to address this problem, and show the quantitative discrepancy of the latter with the more complete 2PI approach, thus motivating further studies in this direction.
description: 19 pages, 14 figures; Contribution to the Proceedings of DISCRETE 2014, London, United Kingdom
Relativistische Addition von Geschwindigkeiten im R5
Creators: name: Sprenger, Roland Alfred
Publisher: name: Zenodo
Year: 2024

description: Es wird eine dritte Art der „Addition“ relativistischer Geschwindigkeiten gezeigt. Dabei wird die Ebene des Minkowski-Diagramms mit der Weltlinie des Körpers mit der zu addierenden Geschwindigkeit u´ um die Winkelhalbierende in die fünfte Dimension hinein so weit gedreht, bis die orthogonalen Projektionen der Koordinatenachsen auf die schiefwinkligen Koordinatenachsen fallen. Dann ist die orthogonale Projektion der Weltlinie die gesuchte Weltlinie im Minkowski-Diagramm, aus der man die resultierende Geschwindigkeit u mit den Koordinaten eines ihrer Punkte berechnen kann.Zum Beweis dessen wird aus dem Additionstheorem der Geschwindigkeiten die Drehung in die fünfte Dimension abgeleitet. 

Fotos eines realen Modells und computergenerierte Diagramme belegen die Aussage. Damit gibt es ein weiteres Indiz für die Existenz einer fünften Dimension der Raumzeit.Nebenher ergibt sich die Veranschaulichung und Auflösung des Paradoxes "c + u´ = c" .

Abschnitte:1. Einleitung2. Der Drehwinkel3. Beweis des Verfahrens4. Geschwindigkeitsaddition mit einer Drehmatrix5. Bestätigung am realen und am computergenerierten Modell6. Geschwindigkeitsaddition mit analytischer Geometrie7. Die fünfte Dimension8. Auflösung des Paradoxes "c + u´ = c"9. Zusammenfassung und Ausblick
Rational extensions of the trigonometric Darboux-Pöschl-Teller potential based on para-Jacobi polynomials
Creators: name: Bagchi, B.
name: Grandati, Y.
name: Quesne, C.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mathematical Physics (math-ph)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The possibility for the Jacobi equation to admit in some cases general solutions that are polynomials has been recently highlighted by Calogero and Yi, who termed them para-Jacobi polynomials. Such polynomials are used here to build seed functions of a Darboux-Bäcklund transformation for the trigonometric Darboux-Pöschl-Teller potential. As a result, one-step regular rational extensions of the latter depending both on an integer index $n$ and on a continuously varying parameter $λ$ are constructed. For each $n$ value, the eigenstates of these extended potentials are associated with a novel family of $λ$-dependent polynomials, which are orthogonal on $\left] -1,1\right[ $.
description: 19 pages, 1 figure
Equality, Diversity & Inclusion in Anatomical Sciences
Creators: name: Welsh, Michelle
name: Varsou, Ourania
Publisher: name: National Teaching Repository
Year: 2023
Subjects: classificationCode: 319999
subject: Other biological sciences not elsewhere classified
classificationCode: 329999
subject: Other biomedical and clinical sciences not elsewhere classified
classificationCode: 390199
subject: Curriculum and pedagogy not elsewhere classified

description: Manual showing how to integrate Equality, Diversity & Inclusion in undergraduate anatomical sciences degrees.
Identification of main-sequence stars with mid-infrared excesses using glimpse: β pictoris analogs?
Creators: name: Uzpen, B.
name: Watson, C.
name: Laurance, T.L.
name: Jackson, J.M.
name: Olsen, K.A.G.
name: Devine, K.E.
name: Wolff, M.J.
name: Bania, T.M.
name: Cohen, M.
name: Marston, A.P.
name: Mathis, J.S.
name: Dickey, J.M.
name: Churchwell, E.
name: Kobulnicky, H.A.
name: Benjamin, R.A.
name: Babler, B.L.
name: Indebetouw, R.
name: Stauffer, J.R.
name: Heitsch, F.
name: Mercer, E.P.
name: Wolfire, M.G.
name: Whitney, B.A.
name: Meade, M.R.
name: Clemens, D.P.
name: Backman, D.E.
Publisher: name: Institute of Physics Publishing
Year: 2005

description: Spitzer IRAC 3.6-8 μm photometry obtained as part of the GLIMPSE survey has revealed mid-infrared excesses for 33 field stars with known spectral types in a 1.2 deg2 field centered on the southern Galactic H II region RCW 49. These stars comprise a subset of 184 stars with known spectral classification, most of which were preselected to have unusually red IR colors. We propose that the mid-IR excesses are caused by circumstellar dust disks that are either very late remnants of stellar formation or debris disks generated by planet formation. Of these 33 stars, 29 appear to be main-sequence stars on the basis of optical spectral classifications. Five of the 29 main-sequence stars are O or B stars with excesses that can be plausibly explained by thermal bremsstrahlung emission, and four are post-main-sequence stars. The lone O star is an O4 V((f)) at a spectrophotometric distance of 3233-535 +540 pc and may be the earliest member of the Westerlund 2 cluster. Of the remaining 24 main-sequence stars, 18 have spectral energy distributions that are consistent with hot dusty debris disks, a possible signature of planet formation. Modeling the excesses as blackbodies demonstrates that the blackbody components have fractional bolometric disk-to-star luminosity ratios, L IR/L*, ranging from 10-3 to 10-2 with temperatures ranging from 220 to 820 K. The inferred temperatures are more consistent with asteroid belts than with the cooler temperatures expected for Kuiper belts. Mid-IR excesses are found in all spectral types from late B to early K.
Dust heating by the interstellar radiation field in models of turbulent molecular clouds
Creators: name: Mathis, J.S.
name: Heitsch, F.
name: Zweibel, E.G.
name: Bethell, T.J.
Publisher: name: Institute of Physics Publishing
Year: 2004

description: We have calculated the radiation field, dust grain temperatures, and far-infrared emissivity of numerical models of turbulent molecular clouds. When compared to a uniform cloud of the same mean optical depth, most of the volume inside the turbulent cloud is brighter, but most of the mass is darker. There is little mean attenuation from center to edge, and clumping causes the radiation field to be somewhat bluer. There is also a large dispersion, typically by a few orders of magnitude, of all quantities relative to their means. However, despite the scatter, the 850 μm emission maps are well correlated with surface density. The fraction of mass as a function of intensity can be reproduced by a simple hierarchical model of density structure.
Phase-space noncommutative extension of the Robertson-Schroedinger formulation of Ozawa's uncertainty principle
Creators: name: Bastos, Catarina
name: Bernardini, Alex E.
name: Bertolami, Orfeu
name: Dias, Nuno Costa
name: Prata, João Nuno
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantum Physics (quant-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We revisit Ozawa's uncertainty principle (OUP) in the framework of noncommutative (NC) quantum mechanics. We derive a matrix version of OUP accommodating any NC structure in the phase-space, and compute NC corrections to lowest order for two measurement interactions, namely the Backaction Evading Quadrature Amplifier and Noiseless Quadrature Transducers. These NC corrections alter the nature of the measurement interaction, as a noiseless interaction may acquire noise, and an interaction of independent intervention may become dependent of the object system. However the most striking result is that noncommutativity may lead to a violation of the OUP itself. The NC corrections for the Backaction Evading Quadrature Amplifier reveal a new term which may potentially be amplified in such a way that the violation of the OUP becomes experimentally testable. On the other hand, the NC corrections to the Noiseless Quadrature Transducer shows an incompatibility of this model with NC quantum mechanics. We discuss the implications of this incompatibility for NC quantum mechanics and for Ozawa's uncertainty principle.
description: 31 pages
Superconducting properties and pseudogap from preformed Cooper pairs in the triclinic (CaFe$_{1-x}$Pt$_x$As)$_{10}$Pt$_3$As$_8$
Creators: name: Surmach, M. A.
name: Brückner, F.
name: Kamusella, S.
name: Sarkar, R.
name: Portnichenko, P. Y.
name: Park, J. T.
name: Ghambashidze, G.
name: Luetkens, H.
name: Biswas, P.
name: Choi, W. J.
name: Seo, Y. I.
name: Kwon, Y. S.
name: Klauss, H. -H.
name: Inosov, D. S.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Using a combination of muon-spin relaxation ($μ$SR), inelastic neutron scattering (INS) and nuclear magnetic resonance (NMR), we investigated the novel iron-based superconductor with a triclinic crystal structure (CaFe$_{1-x}$Pt$_x$As)$_{10}$Pt$_3$As$_8$ (T$_{\rm c}$ = 13 K), containing platinum-arsenide intermediary layers. The temperature dependence of the superfluid density obtained from the $μ$SR relaxation-rate measurements indicates the presence of two superconducting gaps, $Δ_\text{1}\ggΔ_\text{2}$. According to our INS measurements, commensurate spin fluctuations are centered at the ($π$, 0) wave vector, like in most other iron arsenides. Their intensity remains unchanged across T$_\text{c}$, indicating the absence of a spin resonance typical for many Fe-based superconductors. Instead, we observed a peak in the spin-excitation spectrum around $\hslashω_0=\,$7 meV at the same wave vector, which persists above T$_{\rm c}$ and is characterized by the ratio $\hslashω_0/k_\text{B}T_\text{c}\approx\,$6.2, which is significantly higher than typical values for the magnetic resonant modes in iron pnictides (~4.3). The temperature dependence of magnetic intensity at 7 meV revealed an anomaly around T* = 45 K related to the disappearance of this new mode. A suppression of the spin-lattice relaxation rate, $1/T_1T$, observed by NMR immediately below T* without any notable subsequent anomaly at T$_{\rm c}$, indicates that T* could mark the onset of a pseudogap in (CaFe$_{1-x}$Pt$_x$As)$_{10}$Pt$_3$As$_8$, which is likely associated with the emergence of preformed Cooper pairs.
Analysis of B to J a1(1260)in pertubative QCD approach
Creators: name: Mehraban, Fatemeh Najafi Hossein
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In this paper, we analyse the hadronic decay of B to J a1(1260) in pertubative QCD approach (pQCD), where a1(1260) is a axial-vector meson and J{psi} is a vector meson.
description: 1figure. arXiv admin note: text overlap with arXiv:1203.6135 by other authors
Kelvin-Helmholtz instability in a weakly ionized medium
Creators: name: Churchwell, E.
name: Watson, C.
name: Zweibel, E.G.
name: Heitsch, F.
Publisher: name: Institute of Physics Publishing
Year: 2004

description: Ambient interstellar material may become entrained in outflows from massive stars as a result of shear flow instabilities. We study the linear theory of the Kelvin-Helmholtz instability, the simplest example of shear flow instability, in a partially ionized medium. We model the interaction as a two-fluid system (charged and neutral) in a planar geometry. Our principal result is that for much of the relevant parameter space, neutrals and ions are sufficiently decoupled that the neutrals are unstable while the ions are held in place by the magnetic field. Thus, we predict that there should be a detectably narrower line profile in ionized species tracing the outflow compared with neutral species, since ionized species are not participating in the turbulent interface with the ambient ISM. Since the magnetic field is frozen to the plasma, it is not tangled by the turbulence in the boundary layer.
The formation of self-gravitating cores in turbulent magnetized clouds
Creators: name: Norman, M.L.
name: Mac Low, M.-M.
name: Heitsch, F.
name: Li, P.S.
Publisher: name: Institute of Physics Publishing
Year: 2004

description: We use ZEUS-MP to perform high-resolution, three-dimensional, super-Alfvénic turbulent simulations in order to investigate the role of magnetic fields in self-gravitating core formation within turbulent molecular clouds. Statistical properties of our super-Alfvénic model without gravity agree with previous similar studies. Including self-gravity, our models give the following results. They are consistent with the turbulent fragmentation prediction of the core mass distribution of Padoan & Nordlund. They also confirm that local gravitational collapse is not prevented by magnetohydrodynamic waves driven by turbulent flows, even when the turbulent Jeans mass exceeds the mass in the simulation volume. Comparison of results between 2563 and 5123 zone simulations reveals convergence in the collapse rate. Analysis of self-gravitating cores formed in the simulation shows the following: (1) All cores formed are magnetically supercritical by at least an order of magnitude. (2) A power-law relation between central magnetic field strength and density Bc α pc1/2 is observed despite the cores being strongly supercritical. (3) Specific angular momentum. J α R3/2 for cores with radius R. (4) Most cores are prolate and triaxial in shape, in agreement with the results of Gammie and coworkers. We find a weak correlation between the minor axis of the core and the local magnetic field in our simulation at late times, different from the uncorrelated results reported by Gammie and coworkers. The core shape analysis and the power-law relationship between core mass and radius M α R 2.75 suggest the formation of some highly flattened cores. We identified 12 cloud cores with disklike appearance at a later stage of our high-resolution simulation. Instead of being tidally truncated or disrupted, the core disks survive and flourish while undergoing strong interactions. We discuss the physical properties of these disklike cores under the constraints of resolution limits.
2018 AARP California Caregiving Survey
Creators: name: AARP
Publisher: name: Roper Center for Public Opinion Research
Year: 2022

description: Current/former unpaid caregiver (8); care activities (19); caregiving effects on employment (6); financial/home life impacts of caregiving(9); caregiving effects on mental health/stress (11); benefits of caregiving (5); importance of caregivers/providing care to ensure older residents/loved ones can live independently in their own home (2); likelihood of providing care again in the future (3); helpfulness of different types of caregiving support (9); support/oppose proposal to support family caregivers (5); telehealth (8); protecting sensitive health information (2); prefer to receive care for self/loved one with caregiver assistance/assisted living facility/nursing home (1); importance of services for older people and caregivers (11).
Turbulent ambipolar diffusion: Numerical studies in two dimensions
Creators: name: Zweibel, E.G.
name: Devriendt, J.E.G.
name: Heitsch, F.
name: Slyz, A.D.
Publisher: name: Institute of Physics Publishing
Year: 2004

description: Under ideal MHD conditions the magnetic field strength should be correlated with density in the interstellar medium (ISM). However, observations indicate that this correlation is weak. Ambipolar diffusion can decrease the flux-to-mass ratio in weakly ionized media; however, it is generally thought to be too slow to play a significant role in the ISM except in the densest molecular clouds. Turbulence is often invoked in astrophysical problems to increase transport rates above the (very slow) laminar values predicted by kinetic theory. We describe a series of numerical experiments addressing the problem of turbulent transport of magnetic fields in weakly ionized gases. We show, subject to various geometrical and physical restrictions, that turbulence in a weakly ionized medium rapidly diffuses the magnetic flux-to-mass ratio B/ρ through the buildup of appreciable ion-neutral drifts on small scales. These results are applicable to the field strength-density correlation in the ISM, as well as the merging of flux systems such as protostar and accretion disk fields or protostellar jets with ambient matter, and the vertical transport of galactic magnetic fields.
Vers l'institutionnalisation de la médiation pénale au Maroc
Creators: name: Salaheddine MAATOUK
name: Abdelkader OUAZZANI
Publisher: name: Zenodo
Year: 2023

description: Citée laconiquement dans le code de procédure pénale, et dans le code pénal mais encadrée expressément dans une nouvelle conception par l'article 41 du code de procédure pénale, la transaction constitue avec la médiation pénale deux voies magistralement alternatives aux poursuites judiciaires relatives à la petite et moyenne délinquance. Elles traduisent une réponse adéquate et judicieuse au dysfonctionnement administratif et carcéral dont souffre la justice pénale moderne. La médiation pénale promeut un modèle de justice qui se veut de proximité, hautement basée sur une dynamique relationnelle où le verbe, dans une perspective de pacification et réparation, constitue la clé de voûte à toute alternative amiablement admise entre la victime et le transgresseur. Le droit marocain ne reconnaît pas encore la médiation pénale ; mais il n'en demeure pas moins vrai qu'il y a des raisons qui militent en faveur de son institutionnalisation et de son adoption légale.
An Effective Private Data storage and Retrieval System using Secret sharing scheme based on Secure Multi-party Computation
Creators: name: Nair, Divya G.
name: Binu, V. P.
name: Kumar, G. Santhosh
Publisher: name: arXiv
Year: 2015
Subjects: subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences

description: Privacy of the outsourced data is one of the major challenge.Insecurity of the network environment and untrustworthiness of the service providers are obstacles of making the database as a service.Collection and storage of personally identifiable information is a major privacy concern.On-line public databases and resources pose a significant risk to user privacy, since a malicious database owner may monitor user queries and infer useful information about the customer.The challenge in data privacy is to share data with third-party and at the same time securing the valuable information from unauthorized access and use by third party.A Private Information Retrieval(PIR) scheme allows a user to query database while hiding the identity of the data retrieved.The naive solution for confidentiality is to encrypt data before outsourcing.Query execution,key management and statistical inference are major challenges in this case.The proposed system suggests a mechanism for secure storage and retrieval of private data using the secret sharing technique.The idea is to develop a mechanism to store private information with a highly available storage provider which could be accessed from anywhere using queries while hiding the actual data values from the storage provider.The private information retrieval system is implemented using Secure Multi-party Computation(SMC) technique which is based on secret sharing. Multi-party Computation enable parties to compute some joint function over their private inputs.The query results are obtained by performing a secure computation on the shares owned by the different servers.
description: Data Science & Engineering (ICDSE), 2014 International Conference, CUSAT
Holographic thermalization of charged operators
Creators: name: Giordano, Alejandro
name: Grandi, Nicolas E.
name: Silva, Guillermo A.
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study a light-like charged collapsing shell in AdS-Reissner-Nordstrom spacetime, investigating whether the corresponding Vaidya metric is supported by matter that satisfies the null energy condition. We find that, if the absolute value of the charge decreases during the collapse, energy conditions are fulfilled everywhere in spacetime. On the other hand, if the absolute value of the charge increases, the metric does not satisfy energy conditions in the IR region. Therefore, from the gauge/gravity perspective, this last case is only useful to study the thermalization of the UV degrees of freedom. For all these geometries, we probe the thermalization process with two point correlators of charged operators, finding that the thermalization time grows with the charge of the operator, as well as with the dimension of space.
description: 28 pages, 19 figures
RCW 49 at mid-infrared wavelengths: A glimpse from the Spitzer Space Telescope
Creators: name: Dickey, J.M.
name: Babler, B.L.
name: Clemens, D.P.
name: Whitney, B.A.
name: Heitsch, F.
name: Indebetouw, R.
name: Stauffer, J.R.
name: Jackson, J.M.
name: Meade, M.R.
name: Wolff, M.J.
name: Wolfire, M.G.
name: Stolovy, S.R.
name: Kobulnicky, H.A.
name: Watson, C.
name: Bania, T.M.
name: Marston, A.P.
name: Benjamin, R.A.
name: Cohen, M.
name: Churchwell, E.
name: Devine, K.E.
name: Mercer, E.P.
name: Mathis, J.S.
Publisher: name: American Astronomical Society
Year: 2004

description: The luminous, massive star formation region RCW 49, located in the southern Galactic plane, was imaged with the Infrared Array Camera (IRAC) on the Spitzer Space Telescope as part of the Galactic Legacy Infrared Mid-Plane Survey Extraordinaire (GLIMPSE) program. The IRAC bands contain polycyclic aromatic hydrocarbon (PAH) features at 3.3, 6.2, 7.7, and 8.6 μm, as well as the Brα line. These features are the major contributors to the diffuse emission from RCW 49 in the IRAC bands. The Spitzer IRAC images show that the dust in RCW 49 is distributed in a network of fine filaments, pillars, knots, sharply defined boundaries, bubbles, and bow shocks. The regions immediately surrounding the ionizing star cluster and W-R stars are evacuated of dust by stellar winds and radiation. The IRAC images of RCW 49 suggest that the dust in RCW 49 has been sculpted by the winds and radiation from the embedded luminous stars in the inner 5′ (inner ∼6 pc) of the nebula. At projected angular radii φ > 5′ from the central ionizing cluster, the azimuthally averaged infrared intensity falls off as ∼φ-3. Both high-resolution radio and mid-IR images suggest that the nebula is density bounded along its western boundary. The filamentary structure of the dust in RCW 49 suggests that the nebula has a small dust filling factor and, as a consequence, the entire nebula may be slightly density bounded to H-ionizing photons.
The Alleviate Advanced Pain Discovery Platform Data Hub: A national resource for accessing and sharing pain data
Creators: name: Milligan, Gordon
name: Hall, Christopher
name: Appleby, Philip
name: Masood, Erum
name: Martin, Gillian
name: Beggs, Jillian
name: Chuter, Antony
name: Giles, Thomas
name: Villalon, Armando M
name: Quinlan, Philip
name: Cole, Christian
Publisher: name: Zenodo
Year: 2023
Subjects: OMOP
FAIR data
Federated analytics
Pain data

description: There are many clinical and non-clinical datasets investigating pain that have been collected by researchers over many years, however, finding and getting access to them is challenging. The data are siloed in hard-to-reach places, in non-standard formats, and it is not possible to assess how relevant they are before get- ting access. This is a barrier to the pain research community and results in duplication of effort. It does not have to be this way and there are alternative solutions available. The Alleviate Ad- vanced Pain Discovery Platform is an HDR UK Data Hub for the federated querying and secure sharing of UK pain data to re- searchers, analysts and clinicians at a national and internation- al level. People with chronic pain have been involved in design and ongoing management of the platform.
Quantum well states and amplified spin-dependent Friedel oscillations in thin films
Creators: name: Bouhassoune, Mohammed
name: Zimmermann, Bernd
name: Mavropoulos, Phivos
name: Wortmann, Daniel
name: Dederichs, Peter H.
name: Blügel, Stefan
name: Lounis, Samir
Publisher: name: arXiv
Year: 2014
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Electrons mediate many of the interactions between atoms in a solid. Their propagation in a material determines its thermal, electrical, optical, magnetic and transport properties. Therefore, the constant energy contours characterizing the electrons, in particular the Fermi surface, have a prime impact on the behavior of materials. If anisotropic, the contours induce strong directional dependence at the nanoscale in the Friedel oscillations surrounding impurities. Here we report on giant anisotropic charge density oscillations focused along specific directions with strong spin-filtering after scattering at an oxygen impurity embedded in the surface of a ferromagnetic thin film of Fe grown on W(001). Utilizing density functional theory, we demonstrate that by changing the thickness of the Fe films, we control quantum well states confined to two dimensions that manifest as multiple flat energy contours, impinging and tuning the strength of the induced charge oscillations which allow to detect the oxygen impurity at large distances ($\approx$ 50nm).
description: This paper has an explanatory supplement
A glimpse of star formation in the giant H II region RCW 49
Creators: name: Benjamin, R.A.
name: Stolovy, S.R.
name: Indebetouw, R.
name: Mathis, J.S.
name: Wolfire, M.G.
name: Whitney, B.A.
name: Dickey, J.M.
name: Churchwell, E.
name: Meade, M.R.
name: Stauffer, J.R.
name: Mercer, E.P.
name: Bania, T.M.
name: Devine, K.E.
name: Wolff, M.J.
name: Babler, B.L.
name: Heitsch, F.
name: Jackson, J.M.
name: Cohen, M.
name: Marston, A.P.
name: Clemens, D.P.
name: Watson, C.
name: Kobulnicky, H.A.
Publisher: name: American Astronomical Society
Year: 2004

description: GLIMPSE imaging using the Infrared Array Camera (IRAC) on the Spitzer Space Telescope indicates that star formation is ongoing in the RCW 9 giant H II region. A photometric comparison of the sources in RCW 49 to a similar area to its north finds that at least 300 stars brighter than 13th magnitude in band [3.6] have infrared excesses inconsistent with reddening due to foreground extinction. These are likely young stellar objects (YSOs) more massive than 2.5 M⊙, suggesting that thousands more low-mass stars are forming in this cloud. Some of the YSOs are massive (B stars) and therefore very young, suggesting that a new generation of star formation is occurring, possibly triggered by stellar winds and shocks generated by the older (2-3 Myr) central massive cluster. The Spitzer IRAC camera has proven to be ideally suited for distinguishing young stars from field stars, and the GLIMPSE survey of the Galactic plane will likely find thousands of new star formation regions.
Precision Measurement of the Newtonian Gravitational Constant Using Cold Atoms
Creators: name: Rosi, G.
name: Sorrentino, F.
name: Cacciapuoti, L.
name: Prevedelli, M.
name: Tino, G. M.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: About 300 experiments have tried to determine the value of the Newtonian gravitational constant, G, so far, but large discrepancies in the results have made it impossible to know its value precisely. The weakness of the gravitational interaction and the impossibility of shielding the effects of gravity make it very difficult to measure G while keeping systematic effects under control. Most previous experiments performed were based on the torsion pendulum or torsion balance scheme as in the experiment by Cavendish in 1798, and in all cases macroscopic masses were used. Here we report the precise determination of G using laser-cooled atoms and quantum interferometry. We obtain the value G=6.67191(99) x 10^(-11) m^3 kg^(-1) s^(-2) with a relative uncertainty of 150 parts per million (the combined standard uncertainty is given in parentheses). Our value differs by 1.5 combined standard deviations from the current recommended value of the Committee on Data for Science and Technology. A conceptually different experiment such as ours helps to identify the systematic errors that have proved elusive in previous experiments, thus improving the confidence in the value of G. There is no definitive relationship between G and the other fundamental constants, and there is no theoretical prediction for its value, against which to test experimental results. Improving the precision with which we know G has not only a pure metrological interest, but is also important because of the key role that G has in theories of gravitation, cosmology, particle physics and astrophysics and in geophysical models.
description: 3 figures, 1 table
Wilson coefficients and four-quark condensates in QCD sum rules for medium modifications of $D$ mesons
Creators: name: Buchheim, Thomas
name: Hilger, Thomas
name: Kampfer, Burkhard
Publisher: name: arXiv
Year: 2014
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Wilson coefficients of light four-quark condensates in QCD sum rules are evaluated for pseudo-scalar $D$ mesons, thus, pushing the sum rules toward mass dimension six. Contrary to the situation for $\bar{q}q$ mesons the impact of the four-quark condensates for vacuum as well as in-medium situations is found to be rather small within the Borel window used in previous analyses. The complete four-quark condensate contributions enable to identify candidates for an order parameter of spontaneous chiral symmetry breaking/restoration as well as to evaluate stability criteria of operator product expansions.
resample: use the bootstrap and jackknife from Python
Creators: name: Dembinski, Hans Peter
Publisher: name: Zenodo
Year: 2020

description: We present the resample package, which implements the resampling methods jackknife and Efron's bootstrap. Both are computationally intensive but highly general tools to compute biases and variances of estimators. The bootstrap allows one to compute the full covariance matrix for the output of an arbitrarily complex estimation problem, such as a multi-parameter fit, and confidence intervals for those parameters.
Self-healing organic-dye-based random lasers
Creators: name: Anderson, Benjamin R.
name: Gunawidjaja, Ray
name: Eilers, Hergen
Publisher: name: arXiv
Year: 2015
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: One of the primary difficulties in the implementation of organic-dye-based random lasers is the tendency of organic dyes to irreversibly photodecay. In this letter we report the observation of "reversible" photodegradation in a Rhodamine 6G and ZrO$_2$ nanoparticle doped polyurethane random laser. We find that during degradation the emission broadens, redshifts, and decreases in intensity. After degradation the system is observed to self-heal leading to the emission returning to its pristine intensity, giving a recovery efficiency of 100%. While the peak intensity fully recovers, the process is not strictly "reversible" as the emission after recovery is still found to be broadened and redshifted. The combination of the peak emission fully recovering and the broadening of the emission leads to a remarkable result: the random laser cycled through degradation and recovery has a greater integrated emission intensity than the pristine system.
description: 5 pages, 5 figures, Full Bibliography is on page 5
Detect2Rank : Combining Object Detectors Using Learning to Rank
Creators: name: Karaoglu, Sezer
name: Liu, Yang
name: Gevers, Theo
Publisher: name: arXiv
Year: 2014
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Object detection is an important research area in the field of computer vision. Many detection algorithms have been proposed. However, each object detector relies on specific assumptions of the object appearance and imaging conditions. As a consequence, no algorithm can be considered as universal. With the large variety of object detectors, the subsequent question is how to select and combine them. In this paper, we propose a framework to learn how to combine object detectors. The proposed method uses (single) detectors like DPM, CN and EES, and exploits their correlation by high level contextual features to yield a combined detection list. Experiments on the PASCAL VOC07 and VOC10 datasets show that the proposed method significantly outperforms single object detectors, DPM (8.4%), CN (6.8%) and EES (17.0%) on VOC07 and DPM (6.5%), CN (5.5%) and EES (16.2%) on VOC10.
Symmetries of the Schrödinger Equation and Algebra/Superalgebra Duality
Creators: name: Toppan, Francesco
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Some key features of the symmetries of the Schrödinger equation that are common to a much broader class of dynamical systems (some under construction) are illustrated. I discuss the algebra/superalgebra duality involving first and second-order differential operators. It provides different viewpoints for the spectrum-generating subalgebras. The representation-dependent notion of on-shell symmetry is introduced. The difference in associating the time-derivative symmetry operator with either a root or a Cartan generator of the $sl(2)$ subalgebra is discussed. In application to one-dimensional Lagrangian superconformal sigma-models it implies superconformal actions which are either supersymmetric or non-supersymmetric.
description: To appear in the Proceedings of Group30, ICGTMP, Gent 2014
Case Studies: Business and Technical Perspectives in Migration of Legacy Systems to Service Oriented Architecture
Creators: name: Galinium, Maulahikmah
name: Shahbaz, Negar
Publisher: name: arXiv
Year: 2014
Subjects: subject: Computers and Society (cs.CY)
subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: In adoption process of Service Oriented Architecture (SOA), the legacy systems of a company can not be neglected. The reason is the legacy systems have been deployed in the past and have been running critical business processes within an enterprise in its current IT architecture. However not all migration process of legacy systems to SOA has been successfull. Highlighting the right factors to reach legacy systems migration success in a specific company is the key value. The main adopted research method in this study has been interviewed for different companies with different enterprises including bank, furniture, engineering and airline companies in Europe. Through separate interviews, critical success factors of migrating legacy systems into SOA have been collected and identified in each case company. Finally collected results are analyzed and presented as the recognized factors affecting successful migration of legacy assets into SOA from business and technical perspectives.
description: 11 pages, 4 figures
Canals beyond Mars: Beam depolarization in radio continuum maps of the warm ISM
Creators: name: Heitsch, F.
name: Haverkorn, M.
Publisher: name: EDP Sciences
Year: 2004

description: Multi-frequency radio polarimetric observations of the diffuse Galactic synchrotron background enable us to study the structure of the diffuse ionized gas via rotation measure maps. However, depolarization will introduce artifacts in the resulting rotation measure (RM), most notably in the form of narrow, elongated "depolarization canals". We use numerical models of a non-emitting Faraday rotating medium to study the RM distribution needed to create depolarization canals by depolarization due to a finite beam width, and to estimate the influence of this depolarization mechanism on the determination of RM. We argue that the depolarization canals indeed can be caused by beam depolarization, which in turn is a natural consequence when observing a turbulent medium with limited resolution. Furthermore, we estimate that beam depolarization can induce an additional error of about 20% in RM determinations, and considerably less in regions that are not affected by depolarization canals.
The Global Star Formation Laws of Galaxies from a Radio Continuum Perspective
Creators: name: Liu, Lijie
name: Gao, Yu
name: Greve, Thomas R.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We study the global SF law - the relation between gas and SFRs in a sample of 181 local galaxies with L_IR spanning almost five orders of magnitude, which includes 115 normal galaxies and 66 (U)LIRGs. We derive their atomic, molecular gas and dense molecular gas masses using newly available HI, CO and HCN data from the literature, and SFRs are determined both from total IR and 1.4 GHz radio continuum (RC) luminosities. In order to derive the disk-averaged surface densities of gas and SFRs, we have used high-resolution RC observations to measure the radio sizes for all galaxies. We find that dense molecular gas (as traced by HCN) has the tightest correlation with that of SFRs, and is linear in (N=1.01 +/- 0.02) across the full galaxy sample. The correlation between densities of molecular gas (traced by CO) and SFRs is sensitive to the adopted value of the alpha_CO used to infer molecular gas masses from CO luminosities. For a fixed value of alpha_CO, a slope of 1.14+/-0.02 is found. If instead we adopt values of 4.6 and 0.8 for disk galaxies and (U)LIRGs, respectively, we find the two distinct relations. If applying a continuously varying alpha_CO to our sample, we recover a single relation with slope of 1.60+/-0.03. The SFRs is a steeper function of total gas than that of molecular gas, and is tighter among low-luminosity galaxies. We find no correlation between SFRs and atomic gas.
description: Accepted for Publication in ApJ
Prelude to, and Nature of the Space Photometry Revolution
Creators: name: Gilliland, Ronald L.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: It is now less than a decade since CoRoT initiated the space photometry revolution with breakthrough discoveries, and five years since Kepler started a series of similar advances. I'll set the context for this revolution noting the status of asteroseismology and exoplanet discovery as it was 15-25 years ago in order to give perspective on why it is not mere hyperbole to claim CoRoT and Kepler fostered a revolution in our sciences. Primary events setting up the revolution will be recounted. I'll continue with noting the major discoveries in hand, and how asteroseismology and exoplanet studies, and indeed our approach to doing science, have been forever changed thanks to these spectacular missions.
description: Invited review for the CoRoT3-KASC7 Conference: The Space Photometry Revolution, Toulouse, France, July 2014. 6 pages
Suppression of fast reconnection by magnetic shear
Creators: name: Zweibel, E.G.
name: Heitsch, F.
Publisher: name: IOP Publishing Ltd
Year: 2003

description: Magnetic neutral sheets in weakly ionized interstellar gas are rapidly annihilated by ohmic diffusion. In this paper we extend the model to a sheared magnetic configuration, and show that the magnetic pressure associated with even a small nonzero field drastically reduces the reconnection rate of the reversing component.