cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Fully Automated Left Atrium Segmentation from Anatomical Cine Long-axis MRI Sequences using Deep Convolutional Neural Network with Unscented Kalman Filter
Creators: name: Zhang, Xiaoran
name: Noga, Michelle
name: Martin, David Glynn
name: Punithakumar, Kumaradevan
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Image and Video Processing (eess.IV)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: This study proposes a fully automated approach for the left atrial segmentation from routine cine long-axis cardiac magnetic resonance image sequences using deep convolutional neural networks and Bayesian filtering. The proposed approach consists of a classification network that automatically detects the type of long-axis sequence and three different convolutional neural network models followed by unscented Kalman filtering (UKF) that delineates the left atrium. Instead of training and predicting all long-axis sequence types together, the proposed approach first identifies the image sequence type as to 2, 3 and 4 chamber views, and then performs prediction based on neural nets trained for that particular sequence type. The datasets were acquired retrospectively and ground truth manual segmentation was provided by an expert radiologist. In addition to neural net based classification and segmentation, another neural net is trained and utilized to select image sequences for further processing using UKF to impose temporal consistency over cardiac cycle. A cyclic dynamic model with time-varying angular frequency is introduced in UKF to characterize the variations in cardiac motion during image scanning. The proposed approach was trained and evaluated separately with varying amount of training data with images acquired from 20, 40, 60 and 80 patients. Evaluations over 1515 images with equal number of images from each chamber group acquired from an additional 20 patients demonstrated that the proposed model outperformed state-of-the-art and yielded a mean Dice coefficient value of 94.1%, 93.7% and 90.1% for 2, 3 and 4-chamber sequences, respectively, when trained with datasets from 80 patients.
description: Accepted by Medical Image Analysis 2020
Observation of psi(3770)--> pi pi J/psi and Measurement of Gamma_{ee}[psi(2S)]
Creators: name: Adam, N. E.
name: Collaboration, CLEO
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We observe signals for the decays psi(3770)--> X J/psi from data acquired with the CLEO detector operating at the CESR e^+e^- collider with sqrt{s}=3773 MeV. We measure the following branching fractions B(psi(3770)--> XJ/psi) and significances: (189 +- 20 +- 20) x 10^-5 (11.6sigma) for X=pi^+pi^-, (80 +- 25 +- 16) x 10^-5 (3.4sigma) for X=pi^0pi^0, and (87 +- 33 +- 22) x 10^-5 (3.5sigma) for X=eta, where the errors are statistical and systematic, respectively. The radiative return process e^+e^- -->gamma psi(2S) populates the same event sample and is used to measure Gamma_{ee}[psi(2S)]=(2.54 +- 0.03 +- 0.11) keV.
description: 13 ages postscript,also available through http://www.lns.cornell.edu/public/CLNS/2005/, Submitted to PRL
Field Trial of a Flexible Real-time Software-defined GPU-based Optical Receiver
Creators: name: van der Heide, Sjoerd
name: Luis, Ruben S.
name: Puttnam, Benjamin J.
name: Rademacher, Georg
name: Koonen, Ton
name: Shinada, Satoshi
name: Awaji, Yohinari
name: Furukawa, Hideaki
name: Okonkwo, Chigo
Publisher: name: arXiv
Year: 2020
Subjects: subject: Signal Processing (eess.SP)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: We introduce a flexible, software-defined real-time multi-modulation format receiver implemented on an off-the-shelf general-purpose graphics processing unit (GPU). The flexible receiver is able to process 2 GBaud 2-, 4-, 8-, and 16-ary pulse-amplitude modulation (PAM) signals as well as 1 GBaud 4-, 16- and 64-ary quadrature amplitude modulation (QAM) signals, with the latter detected using a Kramers-Kronig (KK) coherent receiver. Experimental performance evaluation is shown for back-to-back. In addition, by using the JGN high speed R&D network testbed, performance is evaluated after transmission over 91 km field-deployed optical fiber and reconfigurable optical add-drop multiplexers (ROADMs).
description: Accepted for publication at Journal of Lightwave Technology, already available via JLT Early Access, see supplied DOI. This v2 version of the article is improved w.r.t. v1 after JLT peer-review. This article is a longer journal version of the conference paper: S.P. van der Heide, et al., Real-time, Software-Defined, GPU-Based Receiver Field Trial, ECOC 2020 paper We1E5, also via arXiv:2010.14333
Evaluation of gas permeability in porous separators for polymer electrolyte fuel cells: CFD simulation based on micro X-ray computed tomography images
Creators: name: Shimotori, Soichiro
name: Kaneko, Toshihiro
name: Yoshimoto, Yuta
name: Kinefuchi, Ikuya
name: Alizadeh, Amer
name: Hsu, Wei-Lun
name: Daiguji, Hirofumi
Publisher: name: arXiv
Year: 2021
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Pore structures and gas transport properties in porous separators for polymer electrolyte fuel cells are evaluated both experimentally and through simulations. In the experiments, the gas permeabilities of two porous samples, a conventional sample and one with low electrical resistivity, are measured by a capillary flow porometer, and the pore size distributions are evaluated with mercury porosimetry. Local pore structures are directly observed with micro X-ray computed tomography (CT). In the simulations, the effective diffusion coefficients of oxygen and the air permeability in porous samples are calculated using random walk Monte Carlo simulations and computational fluid dynamics (CFD) simulations, respectively, based on the X-ray CT images. The calculated porosities and air permeabilities of the porous samples are in good agreement with the experimental values. The simulation results also show that the in-plane permeability is twice the through-plane permeability in the conventional sample, whereas it is slightly higher in the low-resistivity sample. The results of this study show that CFD simulation based on micro X-ray CT images makes it possible to evaluate anisotropic gas permeabilities in anisotropic porous media.
description: 12 pages, 15 figures
Sum rules for leading and subleading form factors in Heavy Quark Effective Theory using the non-forward amplitude
Creators: name: Jugeau, F.
name: Yaouanc, A. Le
name: Oliver, L.
name: Raynal, J. -C.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Within the OPE, we the new sum rules in Heavy Quark Effective Theory in the heavy quark limit and at order 1/m_Q, using the non-forward amplitude. In particular, we obtain new sum rules involving the elastic subleading form factors chi_i(w) (i = 1,2, 3) at order 1/m_Q that originate from the L_kin and L_mag perturbations of the Lagrangian. To the sum rules contribute only the same intermediate states (j^P, J^P) = ((1/2)^-, 1^-), ((3/2)^-, 1^-) that enter in the 1/m_Q^2 corrections of the axial form factor h_(A_1)(w) at zero recoil. This allows to obtain a lower bound on -delta_(1/m^2)^(A_1) in terms of the chi_i(w) and the shape of the elastic IW function xi(w). An important theoretical implication is that chi'_1(1), chi_2(1) and chi'_3(1) (chi_1(1) = chi_3(1) = 0 from Luke theorem) must vanish when the slope and the curvature attain their lowest values rho^2->3/4, sigma^2->15/16. These constraints should be taken into account in the exclusive determination of |V_(cb)|.
description: Invited talk to the International Workshop on Quantum Chromodynamics : Theory and Experiment, Conversano (Bari, Italy), 16-20 June 2005
The Scherk-Schwarz mechanism as a flux compactification with internal torsion
Creators: name: Andrianopoli, L.
name: Lledo', M. A.
name: Trigiante, M.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The aim of this paper is to make progress in the understanding of the Scherk-Schwarz dimensional reduction in terms of a compactification in the presence of background fluxes and torsion. From the eleven dimensional supergravity point of view, we find that a general E6(6) S-S phase may be obtained by turning on an appropriate background torsion, together with suitable fluxes, some of which can be directly identified with certain components of the four-form field-strength. Furthermore, we introduce a novel (four dimensional) approach to the study of dualities between flux/torsion compactifications of Type II/M-theory. This approach defines the action that duality should have on the background quantities, in order for the E7(7) invariance of the field equations and Bianchi identities to be restored also in the presence of fluxes/torsion. This analysis further implies the interpretation of the torsion flux as the T-dual of the NS three-form flux.
description: Version published on J. High Energy Phys
O projecto "Do saber ao sabor, uma bio-experiência romana"
Creators: name: Reis, Emanuel
name: Colaço, Ana
name: Santos, Ana
name: Miguel, Carlos
name: Veiga-Pires, Cristina
name: Ferreira, Clara
name: Baptista, Elina
name: Dias, Filipe
name: Oliveira, Jorge
name: Gonçalves, Luis
name: Guerra, Liliana
name: Rodrigues, Miguel
name: Romão, Mónica
name: Gomes, Tiago
Publisher: name: Zenodo
Year: 2016

description: O Centro Ciência Viva do Algarve (CCVAlg) tem por missão a educação para o conhecimento científico e a divulgação científica e tecnológica, mediante o desenvolvimento e a promoção de ações que estimulem o interesse pela cultura científica e tecnológica junto da população e, em especial, junto da comunidade juvenil. Justifica-se por isso o interesse na exploração da dimensão histórica da ciência pelo CCVAlg. Dar a conhecer o papel que uma técnica ou conhecimento teve em dada época valoriza-a, e mostra quão importante é a atividade científica para a humanidade. Contribui-se assim para despertar junto da população uma perceção positiva sobre a Ciência e sobre quem a produz. Esta comunicação dá a conhecer a primeira participação do CCVAlg no Programa DiVaM ( Dinamizar, Valorizar os Monumentos) financiado pela Direção Regional de Cultura do Algarve para monumentos da sua tutela. Além de contribuir para a divulgação do Património Cultural Imaterial da região, o projeto do CCVAlg foi pensado para proporcionar a oportunidade de vivenciar a cultura e costumes do Algarve Antigo à luz de um enquadramento científico mas informal e lúdico, bem como o contacto com tecnologias e metodologias científicas usadas pelos investigadores no estudo dos monumentos e da sua História. Intitulado "Do saber ao sabor, uma bio-experiência romana", o evento decorreu no Núcleo Museológico da Villa Romana de Milreu e desenrolou-se segundo o conceito da “bio-experiencia”, uma metodologia original. Para além de integrar uma visita orientada que evidenciou aspetos científicos da vida do povo romano e do local, contemplou uma componente prática de interpretação dessa realidade, que incluiu a degustação de pratos típicos da dieta alimentar da época vivenciando o ambiente de um triclinium romano, a identificação de peixes por observação das escamas, a identificação das espécies marinhas dos mosaicos existentes nas ruínas e contacto com processos de produção de ingredientes da gastronomia romana. Foi também disponibilizada uma área infanto-juvenil, apelida de “campus ludi”, onde as crianças puderam brincar com atividades e jogos relacionados com o evento, com a ciência e com o estilo de vida romano. Dados os comentários positivos recolhidos sobre o mérito do projeto, foi já garantido junto da Câmara Municipal de Faro financiamento para a realização de uma exposição itinerante sobre o mesmo e encontra-se em preparação uma nova edição, também nas ruínas Milreu, mas com uma nova temática.
description: Acknowledgment to the funding institution Direção Regional da Cultura do Algarve
The role of the magnetic field in the fragmentation process: the case of G14.225-0.506
Creators: name: Añez-López, N.
name: Busquet, G.
name: Koch, P. M.
name: Girart, J. M.
name: Liu, H. B.
name: Santos, F.
name: Chapman, N. L.
name: Novak, G.
name: Palau, A.
name: Ho, P. T. P.
name: Zhang, Q.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: B-fields are predicted to play a role in the formation of filamentary structures and their fragmentation process. We aim at investigating the role of the B-field in the process of core fragmentation toward the hub-filament systems in the IRDC G14.2, which present different fragmentation level. We performed observations of the thermal dust polarization at 350 μm using the CSO toward the hubs. We applied the polarization--intensity-gradient method to estimate the significance of the B-field over the G-force. The B-field in Hub-N shows a uniform structure along the E-W orientation, perpendicular to the major axis of the hub-filament system. The I-gradient in Hub-N displays a local minimum coinciding with the dust core MM1a detected with interferometric observations. The B-field orientation is perturbed when approaching the dust core. Hub-S shows 2 local minima, reflecting the bimodal distribution of the B-field. In Hub-N, both E and W of the hub-filament system, the I-gradient and the B-field are parallel whereas they tend to be perpendicular when penetrating the filaments and hub. The analysis of the δ- and Σ B-maps indicate that, the B-field cannot prevent the collapse, suggesting that the B-field is initially dragged by the infalling motion and aligned with it, or is channeling material toward the central ridge from both sides. Values of Σ B > 1 are found toward a N-S ridge encompassing the dust emission peak, indicating that in this region B-field dominates over G-force, or that with the current angular resolution we cannot resolve an hypothetical more complex structure. We estimated the B-field strength, the MtF ratio and the A-M number, and found differences between the 2 hubs. The different levels of fragmentation observed in these 2 hubs could arise from the differences in the B-field properties rather than from different intensity of the G-field.
description: 14 pages, 9 figures
Covariant q-differential operators and unitary highest weight representations for U_q su(n,n)
Creators: name: Shklyarov, D.
name: Zhang, G.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Quantum Algebra (math.QA)
subject: FOS: Mathematics
subject: 81R50

description: We investigate a one-parameter family of quantum Harish-Chandra modules of U_q sl(2n). This family is an analog of the holomorphic discrete series of representations of the group SU(n,n) for the quantum group U_q su(n, n). We introduce a q-analog of "the wave" operator (a determinant-type differential operator) and prove certain covariance property of its powers. This result is applied to the study of some quotients of the above-mentioned quantum Harish-Chandra modules. We also prove an analog of a known result by J.Faraut and A.Koranyi on the expansion of reproducing kernels which determines the analytic continuation of the holomorphic discrete series.
description: 26 pages
Calibration of the momentum scale of a particle physics detector using the Armenteros-Podolanski plot
Creators: name: Rodríguez, Pablo Baladrón
name: Chobanova, Veronika
name: Vidal, Xabier Cid
name: Gligorov, Vladimir
name: Martínez, Miriam Lucio
name: Markov, Jovan
name: Santos, Diego Martínez
name: Casasús, Máximo Pló
Publisher: name: arXiv
Year: 2020
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: A method for calibrating the momentum scale in a particle physics detector is described. The method relies on the determination of the masses of the final state particles in two-body decays of neutral particles, which can then be used to obtain corrections in the momentum scale. A modified version of the Armenteros-Podolanski plot and the $K_S^0 \to π^+ π^-$ decay is used as a proof of principle for this method.
LevelScheme: A level scheme drawing and scientific figure preparation system for Mathematica
Creators: name: Caprio, M. A.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Computational Physics (physics.comp-ph)
subject: Nuclear Experiment (nucl-ex)
subject: Nuclear Theory (nucl-th)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: LevelScheme is a scientific figure preparation system for Mathematica. The main emphasis is upon the construction of level schemes, or level energy diagrams, as used in nuclear, atomic, molecular, and hadronic physics. LevelScheme also provides a general infrastructure for the preparation of publication-quality figures, including support for multipanel and inset plotting, customizable tick mark generation, and various drawing and labeling tasks. Coupled with Mathematica's plotting functions and powerful programming language, LevelScheme provides a flexible system for the creation of figures combining diagrams, mathematical plots, and data plots.
description: LaTeX (RevTeX), 10 pages, associated files available from http://wnsl.physics.yale.edu/levelscheme
The role of solvency in the stabilization of a high internal phase emulsion explosive
Creators: name: Baranyai, Kriszti{U00E1}N J{U00E1}Nos
Publisher: name: The Australian National University
Year: 2010
Subjects: subject: TP271.B37 2010
subject: Explosives
subject: Emulsions
subject: Solvents

description: The stability of an industrial emulsion explosive comprising a high internal phase water-in-oil emulsion, stabilised by a polyisobutylene based surfactant (PIBSA) was investigated as a function of the oil phase and related parameters. The emulsion was characterised using a small angle and ultra small angle neutron scattering (SANS and USANS) in the size range 10 {u00C5} to 20 ?m using the technique of contrast matching. In addition to the characterisation, solution viscometry experiments were performed to enable the measurement of the surfactant-solvent interaction through the Flory-Huggins constant. In the industrial setting, diesel is used as the oil phase. To enable a systematic study of the effect of the solvent, in addition to diesel, toluene; cyclohexane; and hexadecane were used to approximate the naphthenic, aromatic and aliphatic character of diesel. The solution viscometry experiments showed that the nature of the oil phase has a marked effect on the interaction between the solvent and the PIBSA surfactant. This effect was measured as a change in the Huggins constant as a function of the solvency. Diesel was found to be a theta solvent for PIBSA at 25{u00B0}C. As diesel is the choice of solvent in the industrial setting, this result showed that there is a correlation between the extreme stability of the emulsion and favourable solvent-surfactant interaction. Measurements on toluene, hexadecane, the 50:50 v/v hexadecane:toluene mixture and cyclohexane presented a trend in solvency showing that aromatic character in the solvent diminishes solvent quality as do saturated cyclic compounds (cyclohexane). The structural characterization through neutron scattering revealed the presence of reverse micelles; micron sized aggregates of surfactant; and the behaviour of the PIBSA surfactant at the droplet-oil interface. All of the above were found to be highly sensitive to the nature of the oil phase. The structural and thermodynamic information fit with a depletion stabilization model of emulsion stability. The depletion stabilisation theory enabled the calculation of the depletion potential barrier to coalescence based on the knowledge of the droplet and reverse micelle sizes, and the volume fraction of the reverse micelles. The sensitivity of the emulsion to the nature of the solvent phase was explained in terms of the varying population of reverse micelles as a function of the oil phase and the Huggins constant. As a result of this theory, a clear connection was established between solvent quality and emulsions stability.
First NNLO fragmentation functions of $K_S^0$ and $Λ/\barΛ$ and their uncertainties in the presence of hadron mass corrections
Creators: name: Soleymaninia, Maryam
name: Abdolmaleki, Hamed
name: Khanpour, Hamzeh
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The current paper presents a determination of $K^0_S$ and $Λ/\barΛ$ fragmentation functions (FFs) from QCD analysis of single-inclusive electron-positron annihilation process (SIA). Our FFs determinations are performed at next-to-leading order (NLO), and for the first time, at next-to-next-to-leading order (NNLO) accuracy in perturbative Quantum Chromodynamics (pQCD) which is designated as {\tt SAK20} FFs. Each of these FFs is accompanied by their uncertainties which are determined using the `Hessian' method. Considering the hadron mass corrections, we clearly investigate the reliability of our results upon the inclusion of higher-order QCD correction. We provide comparisons of {\tt SAK20} FFs set with the available analysis from another group, finding in general a reasonable agreement, and also considerable differences. In order to judge the fit quality, our theoretical predictions are compared with the analyzed SIA datasets. {\tt SAK20} FFs at NLO and NNLO accuracy along with their uncertainties are made available in the standard {\tt LHAPDF} format in order to use for predictions of present and future measurements in high-energy collisions such as LHC and RHIC.
description: 25 pages, 16 Figures, 4 Tables, Accepted for Publication in Physical Review D
A highly-ionized absorber as a new explanation for the spectral changes during dips from X-ray binaries
Creators: name: Boirin, L.
name: Trigo, M. Diaz
name: Mendez, M.
name: Parmar, A. N.
name: Kaastra, J. S.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Until now, the spectral changes observed from persistent to dipping intervals in dipping low-mass X-ray binaries were explained by invoking progressive and partial covering of an extended emission region. Here, we propose a novel and simpler way to explain these spectral changes, which does not require any partial covering and hence any extended corona, and further has the advantage of explaining self-consistently the spectral changes both in the continuum and the narrow absorption lines that are now revealed by XMM-Newton. In 4U 1323-62, we detect Fe XXV and Fe XXVI absorption lines and model them for the first time by including a complete photo-ionized absorber model rather than individual Gaussian profiles. We demonstrate that the spectral changes both in the continuum and the lines can be simply modeled by variations in the properties of the ionized absorber. From persistent to dipping the photo-ionization parameter decreases while the equivalent hydrogen column density of the ionized absorber increases. In a recent work (see Diaz Trigo et al. in these proceedings), we show that our new approach can be successfully applied to all the other dipping sources that have been observed by XMM-Newton.
description: 5 pages, 5 figures, to appear in the proceedings of "The X-ray Universe 2005", San Lorenzo de El Escorial (Spain), 26-30 September 2005
Benchmarking Invertible Architectures on Inverse Problems
Creators: name: Kruse, Jakob
name: Ardizzone, Lynton
name: Rother, Carsten
name: Köthe, Ullrich
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences
subject: 68T01

description: Recent work demonstrated that flow-based invertible neural networks are promising tools for solving ambiguous inverse problems. Following up on this, we investigate how ten invertible architectures and related models fare on two intuitive, low-dimensional benchmark problems, obtaining the best results with coupling layers and simple autoencoders. We hope that our initial efforts inspire other researchers to evaluate their invertible architectures in the same setting and put forth additional benchmarks, so our evaluation may eventually grow into an official community challenge.
Exploring the literature on racism and health practitioner regulation: A scoping review
Creators: name: Chiu, Patrick
name: Kung, Janice
name: Louie-Poon, Samantha
name: Leslie, Kathleen
Publisher: name: OSF Registries
Year: 2024
Subjects: subject: Medicine and Health Sciences
subject: anti-racism
subject: health practitioner regulation
subject: licensing bodies
subject: racism
subject: regulatory bodies

description: Racism in healthcare leads to significant harm for healthcare professionals and the clients, families, and communities they serve. Increasingly, health practitioner regulators are recognizing the importance of reforming policies and practices to contribute to anti-racist regulatory approaches. An understanding of the current state of literature can help identify knowledge gaps and inform the development of research agendas that contribute to the evidence base required to improve health practitioner regulators’ approaches to addressing racism.

In accordance with the Joanna Briggs Institute (JBI) guidelines for scoping reviews, this scoping review will explore the nature, extent, and range of literature focused on racism and health practitioner regulation and identify gaps in the literature. The questions guiding this review include: What is the nature, extent, and range of literature on racism and health practitioner regulation? In what ways do health practitioner regulators’ policies and practice contribute to and perpetuate interpersonal or institutional racism? What actions have health practitioner regulators implemented, or what can be implemented, to address racism experienced by healthcare practitioners and patients within health care systems?

A comprehensive search strategy will be conducted by an experienced health sciences librarian. The review will include papers that discuss how health practitioner regulation can contribute to and perpetuate interpersonal and institutional racism, and how regulatory policies and practices can help address racism. Relevant records will be retrieved by systematically searching electronic library databases. We will also search for grey literature using the websites of leading global regulatory organizations. No limitations will be placed on year of publication. Two reviewers will independently screen titles and abstracts followed by full text. Data will be extracted using a pre-developed data extraction form and analyzed using descriptive statistics and conventional content analysis.

Results will be presented using evidence tables and a narrative summary. Reporting will follow the Preferred Reporting Items for Systematic Reviews and Meta-Analyses Extension for Scoping Reviews (PRISMA-ScR). Findings will inform the development of research agendas to build the evidence base required to improve health practitioner regulators’ approaches to addressing racism across professions and jurisdictions.
On the determination of the deceleration parameter from Supernovae data
Creators: name: Virey, J. -M.
name: Taxil, P.
name: Tilquin, A.
name: Ealet, A.
name: Tao, C.
name: Fouchez, D.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Supernovae searches have shown that a simple matter-dominated and decelerating universe should be ruled out. However a determination of the present deceleration parameter $q_0$ through a simple kinematical description is not exempt of possible drawbacks. We show that, with a time dependent equation of state for the dark energy, a bias is present for $q_0$ : models which are very far from the so-called Concordance Model can be accommodated by the data and a simple kinematical analysis can lead to wrong conclusions. We present a quantitative treatment of this bias and we present our conclusions when a possible dynamical dark energy is taken into account.
description: 4 pages, 3 figures, submitted
Resolving singular forces in cavity flow: Multiscale modeling from atoms to millimeters
Creators: name: Nie, Xiaobo
name: Robbins, Mark. O.
name: Chen, Shiyi
Publisher: name: arXiv
Year: 2005
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: A multiscale approach for fluid flow is developed that retains an atomistic description in key regions. The method is applied to a classic problem where all scales contribute: The force on a moving wall bounding a fluid-filled cavity. Continuum equations predict an infinite force due to stress singularities. Following the stress over more than six decades in length in systems with characteristic scales of millimeters and milliseconds allows us to resolve the singularities and determine the force for the first time. The speedup over pure atomistic calculations is more than fourteen orders of magnitude. We find a universal dependence on the macroscopic Reynolds number, and large atomistic effects that depend on wall velocity and interactions.
description: 4 pages,3 figures
Do Saber ao Criar: experiências tecnoromanas na Villa de Milreu
Creators: name: Reis, Emanuel
name: Colaço, Ana
name: Miguel, Carlos
name: Vargues, Filipa
name: Dias, Filipa
name: Gonçalves, Luis
name: Gomes, Tiago
name: Martins, Susana Calado
name: Santos, Marco António
name: Francisco, Maria Luisa
name: Garcia, Cristina
name: Brigas, Amadeu
name: Silva, Ana Paula
name: Azambuja, Sónia Talhé
name: Canas, Ricardo
name: Fernandes, Paulo
name: Moura, Delminda
name: Veiga-Pires, Cristina
Publisher: name: Zenodo
Year: 2018
Subjects: DiVaM
Romano
Milreu
CCVAlg

description: A Villa de Milreu é um exemplo do modelo de ocupação romana da região da Iberia, centrada na exploração dos recursos agrícolas, marinhos e na produção de bens alimentares, que eram exportados por via marítima para os portos do Império.
 O Centro Ciência Viva do Algarve traz “experiências” às ruínas de Milreu pelo quarto ano consecutivo, altura em que impera que dediquemos pela primeira vez um dia inteiro ao público escolar.
 Assim, continuando a destacar o “saber" característico da sociedade romana da época, desta vez sob o mote “Do Saber ao Criar: experiências tecnoromanas na Villa de Milreu", esta 4ª edição, para além de no sábado, dia 20, renovar a oportunidade dada nas edições anteriores aos participantes de conhecer e “vivenciar” o estilo de vida dos romanos que habitaram o local, através de atividades de cariz essencialmente prático, estende-a este ano aos alunos durante o dia 19, sexta feira.
 Ambos os dias do evento são realizados no âmbito do programa DiVaM 2018. Esperamos que passe bons momentos connosco em Milreu!
description: Financiado pela Direcção Geral de Cultura do Algarve ao abrigo do Programa DiVaM
Analytical Solution for the Steady States of the Driven Hubbard model
Creators: name: Tindall, Joseph
name: Schlawin, Frank
name: Sentef, Michael A.
name: Jaksch, Dieter
Publisher: name: arXiv
Year: 2020
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Under the action of coherent periodic driving a generic quantum system will undergo Floquet heating and continously absorb energy until it reaches a featureless thermal state. The phase-space constraints induced by certain symmetries can, however, prevent this and allow the system to dynamically form robust steady states with off-diagonal long-range order. In this work, we take the Hubbard model on an arbitrary lattice with arbitrary filling and, by simultaneously diagonalising the two possible SU(2) symmetries of the system, we analytically construct the correlated steady states for different symmetry classes of driving. This construction allows us to make verifiable, quantitative predictions about the long-range particle-hole and spin-exchange correlations that these states can possess. In the case when both SU(2) symmetries are preserved in the thermodynamic limit we show how the driving can be used to form a unique condensate which simultaneously hosts particle-hole and spin-wave order.
description: 9 pages, 5 figures
Dynamic scaling in entangled mean-field gelation polymers
Creators: name: Das, Chinmay
name: Read, Daniel J.
name: Kelmanson, Mark A.
name: McLeish, Tom C. B.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We present a simple reaction kinetics model to describe the polymer synthesis used by Lusignan et al. (PRE, 60, 5657, 1999) to produce randomly branched polymers in the vulcanization class. Numerical solution of the rate equations gives probabilities for different connections in the final product, which we use to generate a numerical ensemble of representative molecules. All structural quantities probed by Lusignan et al. are in quantitative agreement with our results for the entire range of molecular weights considered. However, with detailed topological information available in our calculations, our estimate of the `rheologically relevant' linear segment length is smaller than that estimated by them. We use a numerical method based on tube model of polymer melts to calculate the rheological properties of such molecules. Results are in good agreement with experiment, except that in the case of the largest molecular weight samples our estimate of the zero-shear viscosity is significantly lower than the experimental findings. Using acid concentration as an indicator for closeness to the gelation transition, we show that the high-molecular-weight polymers considered are at the limit of mean-field behavior - which possibly is the reason for this disagreement. For a truly mean-field gelation class of model polymers, we numerically calculate the rheological properties for a range of segment lengths. Our calculations show that the tube theory with dynamical dilation predicts that, very close to the gelation limit, contribution to viscosity for this class of polymers is dominated by the contribution from constraint-release Rouse motion and the final viscosity exponent approaches Rouse-like value.
ลักษณะทางสังคมและวัฒนธรรมที่สะท้อนจากการใช้คำเรียกบุคคลที่สาม สำหรับผู้หญิงในนวนิยายเวียดนาม พ.ศ. 2473-2553
Creators: name: Nguyen Thi Thuy Chau
Publisher: name: Center for Research on Plurality in the Mekong Region (CERP)
Year: 2015
Subjects: characteristics of society and culture, third-person personal reference terms, Vietnamese language

description: 3, 11, Journal of Mekong Societies
Unification in the low radio luminosity regime; evidence from optical line emission
Creators: name: Marchã, M. J. M.
name: Browne, I. W. A.
name: Jethava, N.
name: Antón, S.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We address the question of whether or not the properties of all low-luminosity flat spectrum radio sources, not just the obvious BL Lac objects, are consistent with them being the relativistically beamed counterparts of the low radio luminosity radio galaxies (the Fanaroff-Riley type 1 - FRI). We compare the emission-line luminosities of a well studied sample of core-dominated radio sources with a matched sample of FR I radio galaxies. The emission lines in the core-dominated objects are on average significantly more luminous than those in the comparison sample, inconsistent with the simplest unified models in which there is no orientation dependence of the line emission. However, the results are equally consistent with a scenario in which, for the majority of objects, beaming has minimal effect on the observed core luminosities of a large fraction of the FRI population and that intrinsically stronger cores simply give rise to stronger emission lines. We conclude that FRI unification is much more complex than usually portrayed, and models combining beaming with an intrinsic relationship between core and emission line strengths need to be explored.
description: 9 pages, accepted for publication in MNRAS
Do You Do Yoga? Understanding Twitter Users' Types and Motivations using Social and Textual Information
Creators: name: Islam, Tunazzina
name: Goldwasser, Dan
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computation and Language (cs.CL)
subject: Artificial Intelligence (cs.AI)
subject: Computers and Society (cs.CY)
subject: Machine Learning (cs.LG)
subject: Social and Information Networks (cs.SI)
subject: FOS: Computer and information sciences

description: Leveraging social media data to understand people's lifestyle choices is an exciting domain to explore but requires a multiview formulation of the data. In this paper, we propose a joint embedding model based on the fusion of neural networks with attention mechanism by incorporating social and textual information of users to understand their activities and motivations. We use well-being related tweets from Twitter, focusing on 'Yoga'. We demonstrate our model on two downstream tasks: (i) finding user type such as either practitioner or promotional (promoting yoga studio/gym), other; (ii) finding user motivation i.e. health benefit, spirituality, love to tweet/retweet about yoga but do not practice yoga.
description: accepted at 2021 IEEE 15th International Conference on Semantic Computing (ICSC), 4 pages. Minor changes for camera-ready version. arXiv admin note: text overlap with arXiv:2012.02939
Detection of Replay Attacks to GNSS based on Partial Correlations and Authentication Data Unpredictability
Creators: name: Seco-Granados, Gonzalo
name: Gomez-Casco, David
name: Lopez-Salcedo, Jose A.
name: Fernandez-Hernandez, Ignacio
Publisher: name: arXiv
Year: 2020
Subjects: subject: Cryptography and Security (cs.CR)
subject: Signal Processing (eess.SP)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Intentional interference, and in particular GNSS spoofing, is currently one of the most significant concerns of the Positioning, Navigation and Timing (PNT) community. With the adoption of Open Service Navigation Message Authentication (OSNMA) in Galileo, the E1B signal component will continuously broadcast unpredictable cryptographic data. This allows GNSS receivers not only to ensure the authenticity of data origin but also to detect replay spoofing attacks for receivers already tracking real signals with relatively good visibility conditions. Since the spoofer needs to estimate the unpredictable bits introduced by OSNMA with almost zero delay in order to perform a Security Code Estimation and Replay (SCER) attack, the spoofer unavoidably introduces a slight distortion into the signal, which can be the basis of a spoofing detector. In this work, we propose five detectors based on partial correlations of GNSS signals obtained over predictable and unpredictable parts of the signals. We evaluate them in a wide set of test cases, including different types of receiver and spoofing conditions. The results show that one of the detectors is consistently superior to the others, and it is able to detect SCER attacks with a high probability even in favorable conditions for the spoofer. Finally, we discuss some practical considerations for implementing the proposed detector in receivers, in particular when the Galileo OSNMA message structure is used.
Text: Story of Savarora
Creators: name: Quenamá Lucitante, Graciela
name: Dabkowski, Maksymilian
name: Aguinda, Shen
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2021
Subjects: subject: con

description: Savarora was a beautiful girl, but she fell in love with a married man. Savarora told him to kill his wife so that he can be with her and that she would take good care of him.
Manifold algorithmic errors in quantum computers with static internal imperfections
Creators: name: Cetinbas, Murat
name: Wilkie, Joshua
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The inevitable existence of static internal imperfections and residual interactions in some quantum computer architectures result in internal decoherence, dissipation, and destructive unitary shifts of active algorithms. By exact numerical simulations we determine the relative importance and origin of these errors for a Josephson charge qubit quantum computer. In particular we determine that the dynamics of a CNOT gate interacting with its idle neighboring qubits via native residual coupling behaves much like a perturbed kicked top in the exponential decay regime, where fidelity decay is only weakly dependent on perturbation strength. This means that retroactive removal of gate errors (whether unitary or non-unitary) may not be possible, and that effective error correction schemes must operate concurrently with the implementation of subcomponents of the gate.
Full-Polarization Observations of OH Masers in Massive Star-Forming Regions: I. Data
Creators: name: Fish, Vincent L.
name: Reid, Mark J.
name: Argon, Alice L.
name: Zheng, Xing-Wu
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present full-polarization VLBA maps of the ground-state, main-line, 2 Pi 3/2, J = 3/2 OH masers in 18 Galactic massive star-forming regions. This is the first large polarization survey of interstellar hydroxyl masers at VLBI resolution. A total of 184 Zeeman pairs are identified, and the corresponding magnetic field strengths are indicated. We also present spectra of the NH3 emission or absorption in these star-forming regions. Analysis of these data will be presented in a companion paper.
description: 111 pages, including 42 figures and 21 tables, to appear in ApJS
Particle Swarm Optimization: An efficient method for tracing periodic orbits in 3D galactic potentials
Creators: name: Skokos, Ch.
name: Parsopoulos, K. E.
name: Patsis, P. A.
name: Vrahatis, M. N.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: Numerical Analysis (math.NA)
subject: Neural and Evolutionary Computing (cs.NE)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: FOS: Computer and information sciences

description: We propose the Particle Swarm Optimization (PSO) as an alternative method for locating periodic orbits in a three--dimensional (3D) model of barred galaxies. We develop an appropriate scheme that transforms the problem of finding periodic orbits into the problem of detecting global minimizers of a function, which is defined on the Poincaré Surface of Section (PSS) of the Hamiltonian system. By combining the PSO method with deflection techniques, we succeeded in tracing systematically several periodic orbits of the system. The method succeeded in tracing the initial conditions of periodic orbits in cases where Newton iterative techniques had difficulties. In particular, we found families of 2D and 3D periodic orbits associated with the inner 8:1 to 12:1 resonances, between the radial 4:1 and corotation resonances of our 3D Ferrers bar model. The main advantages of the proposed algorithm is its simplicity, its ability to work using function values solely, as well as its ability to locate many periodic orbits per run at a given Jacobian constant.
description: 12 pages, 8 figures, accepted for publication in MNRAS
Enforcing robust control guarantees within neural network policies
Creators: name: Donti, Priya L.
name: Roderick, Melrose
name: Fazlyab, Mahyar
name: Kolter, J. Zico
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (cs.LG)
subject: Optimization and Control (math.OC)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: When designing controllers for safety-critical systems, practitioners often face a challenging tradeoff between robustness and performance. While robust control methods provide rigorous guarantees on system stability under certain worst-case disturbances, they often yield simple controllers that perform poorly in the average (non-worst) case. In contrast, nonlinear control methods trained using deep learning have achieved state-of-the-art performance on many control tasks, but often lack robustness guarantees. In this paper, we propose a technique that combines the strengths of these two approaches: constructing a generic nonlinear control policy class, parameterized by neural networks, that nonetheless enforces the same provable robustness criteria as robust control. Specifically, our approach entails integrating custom convex-optimization-based projection layers into a neural network-based policy. We demonstrate the power of this approach on several domains, improving in average-case performance over existing robust control methods and in worst-case stability over (non-robust) deep RL methods.
description: Code available online: https://github.com/locuslab/robust-nn-control
General Theory of Large D Membranes Consistent with Second Law of Thermodynamics
Creators: name: Saha, Arunabha
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We write down the most general membrane equations dual to black holes for a general class of gravity theories, up to sub-leading order in $1/D$ in large $D$ limit. We derive a "minimal" entropy current which satisfies a local form of second law from these membrane equations. We find that consistency with second law requires the membrane equations to satisfy certain constraints. We find additional constraints on the membrane equations from the existence of membrane solutions dual to stationary black holes. Finally we observe a tension between second law and matching with Wald entropy for dual stationary black hole configurations, for the minimal entropy current. We propose a simple modification of the membrane entropy current so that it satisfies second law and also the stationary membrane entropy matches the Wald entropy.
description: 36+10 pages, Section on matching membrane entropy to Wald entropy changed to include discussions on modified entropy current. Corresponding changes included in abstract and other relevant places in the paper