cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Atom interferometry
Creators: name: Miffre, Alain
name: Jacquey, Marion
name: Büchner, Matthias
name: Trénec, Gérard
name: Vigué, Jacques
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In this paper, we present a brief overview of atom interferometry. This field of research has developed very rapidly since 1991. Atom and light wave interferometers present some similarities but there are very important differences in the tools used to manipulate these two types of waves. Moreover, the sensitivity of atomic waves and light waves to their environment is very different. Atom interferometry has already been used for a large variety of studies: measurements of atomic properties and of inertial effects (accelerations and rotations), new access to some fundamental constants, observation of quantum decoherence, etc. We review the techniques used for a coherent manipulation of atomic waves and the main applications of atom interferometers.
description: submitted to Physica Scripta as a Comment on Atomic Molecular and Optical Physics
Quantum Cosmology and the Arrow of Time
Creators: name: Kiefer, Claus
Publisher: name: arXiv
Year: 2005
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Although most fundamental laws are invariant under time reversal, experience exhibits the presence of irreversible phenomena -- the arrows of time. Their origin lies in cosmology, and I argue that only quantum cosmology can provide the appropriate formal framework. After briefly reviewing the formalism, I discuss how a simple and natural boundary condition can lead to the observed arrows of time. This yields at the same time interesting consequences for black holes.
description: 10 pages, contribution to the Proceedings of the conference DICE2004, Piombino, Italy, September 2004
Betz, Ulrich, Wendel, Theo, Steeb, Hartmut: Zwischenbilanz
Creators: name: Müller, Wolfgang
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 40 Nr. 2 (1991): Ökumenische Rundschau, Band 40, Heft 2
Connection between the "Strutinsky level density" and the semiclassical level density (published version)
Creators: name: Mohammed-Azizi, B.
name: Medjadi, D. E.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We establish an analytical link between the level density obtained by means of the Strutinsky averaging method, and the semiclassical level density. This link occurs only in the so-called "asymptotic limit". It turns out that the Strutinsky method amounts to an approximation to the semiclassical method. This approximation contains an unavoidable remainder which constitutes an intrinsic noise in comparison to the semiclassical method. Thus, the "old" problem of the dependency of the Strutinsky procedure on the two free smoothing parameters of the averaging is intimately connected to this noise. On the other hand, we demonstrate that the noise of the method is small in the average density of states and in the average energy, whereas it might be non-negligible in the shell correction itself. In order to improve this method, we give a "rule" which consists simply of minimizing the relative error made on the average energy.
description: 6 figures
Cosmic voids and induced hyperbolicity
Creators: name: Samsonyan, M.
name: Kocharyan, A. A.
name: Stepanian, A.
name: Gurzadyan, V. G.
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Cosmic voids - the low density regions in the Universe - as characteristic features of the large scale matter distribution, are known for their hyperbolic properties. The latter implies the deviation of photon beams due to their underdensity, thus mimicing the negative curvature. We now show that the hyperbolicity can be induced not only by negative curvature or underdensity but also depends on the anisotropy of the photon beams.
description: 5 pages, 1 figure, Eur. Phys. J. Plus (in press); to match the published version
Strange Pulsar Hypothesis
Creators: name: Mandal, Raka Dona Ray
name: Sinha, Monika
name: Bagchi, Manjari
name: Konar, Sushan
name: Dey, Mira
name: Dey, Jishnu
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: It appears that there is a genuine shortage of radio pulsars with surface magnetic fields significantly smaller than $\sim 10^8$ Gauss. We propose that the pulsars with very low magnetic fields are actually strange stars locked in a state of minimum free energy and therefore at a limiting value of the magnetic field which can not be lowered by the system spontaneously.
description: 4 pages, 1 figure, uses LaTeX2e(mn2e.cls) and astrobib(mnras.bst), accepted in MNRAS
Offerings Dance As A Medium Of Socializing Religious Values In The Catholic Church, Ganjuran, Yogyakarta
Creators: name: Merry Violyta Fransisca Pesulima, Muhammad Jazuli, Tjetjep Rohendi Rohidi, Agus Cahyono
Publisher: name: Zenodo
Year: 2024
Subjects: Offerings Dance, Socialization,Religious Values

description: The offering dance also known as standard dance is a religious or ritual ceremony comprising freedom of creation. Therefore, this study aims to identify the offering dance as a means of socializing religious values in the Catholic Church, Ganjuran, Yogyakarta. This is a qualitative research with anthropological and art approaches. Data were collected through observation, interviews, and documents. The obtained data were analyzed through data reduction, presentation, and verification procedures. Furthermore, the triangulation of data sources, methods, and theories was used to determine their validity. The values of religiosity associated with offering dance used the Bouman's analysis to determine the values considered sacred by the community. These values are used as guidelines and further analyzed based on Maclever's socialization analysis, which is a process that individuals go through to learn the norms, values, roles, and all other requirements needed to enable effective participation in social life. The results showed that the offering dance used as a means of socialization comprises educational, tolerance, moral education, culture, aesthetics, and social solidarity values. In addition, the findings also showed that the offering dance has been passed down from generation to generation with symbols capable of indirectly affecting the condition of the congregation and society.
Measurement-device-independent entanglement detection for continuous-variable systems
Creators: name: Abiuso, Paolo
name: Bäuml, Stefan
name: Cavalcanti, Daniel
name: Acín, Antonio
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We study the detection of continuous-variable entanglement, for which most of the existing methods designed so far require a full specification of the devices, and we present protocols for entanglement detection in a scenario where the measurement devices are completely uncharacterised. We first generalise, to the continuous variable regime, the seminal results by Buscemi [PRL 108, 200401(2012)] and Branciard et al. [PRL 110, 060405 (2013)], showing that all entangled states can bedetected in this scenario. Most importantly, we then describe a practical protocol that allows for the measurement-device-independent certification of entanglement of all two-mode entangled Gaussian states. This protocol is feasible with current technology as it makes only use of standard optical setups such as coherent states and homodyne measurements.
description: Accepted in PRL
ปริทัศน์หนังสือ (Book Reviews) Universal Basic Income: Pennies from Heaven
Creators: name: กฤษฎา ธีระโกศลพงศ์
Publisher: name: กองบริหารการวิจัย
Year: 2562
Subjects: รายได้พื้นฐานถ้วนหน้า, การคุ้มครองทางสังคม, ทุนมนุษย์

description: วารสารธรรมศาสตร์, 38, 2, 18-26
Series acceleration formulas for Dirichlet series with periodic coefficients
Creators: name: Bradley, David M.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Number Theory (math.NT)
subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics
subject: 11M06 (Primary) 11M41, 11Y60 (Secondary)

description: Series acceleration formulas are obtained for Dirichlet series with periodic coefficients. Special cases include Ramanujan's formula for the values of the Riemann zeta function at the odd positive integers exceeding two, and related formulas for values of Dirichlet L-series and the Lerch zeta function. Such formulas have been made famous by Lerch, Ramanujan, Grosswald, Berndt, and others. The approach herein is based on the partial fraction expansion of the hyperbolic cotangent, and as such is somewhat more elementary than previous approaches, yet is quite general.
description: 17 pages, AMSLaTeX, Math Reviews: MR #2003a:11112
Statistical properties of fracture in a random spring model
Creators: name: Nukala, Phani Kumar V. V.
name: Zapperi, Stefano
name: Simunovic, Srdan
Publisher: name: arXiv
Year: 2005
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Using large scale numerical simulations we analyze the statistical properties of fracture in the two dimensional random spring model and compare it with its scalar counterpart: the random fuse model. We first consider the process of crack localization measuring the evolution of damage as the external load is raised. We find that, as in the fuse model, damage is initially uniform and localizes at peak load. Scaling laws for the damage density, fracture strength and avalanche distributions follow with slight variations the behavior observed in the random fuse model. We thus conclude that scalar models provide a faithful representation of the fracture properties of disordered systems.
description: 12 pages, 17 figures, 1 gif figure
Finite momentum meson correlation functions in a QCD plasma
Creators: name: Alberico, W. M.
name: Beraudo, A.
name: Czerski, P.
name: Molinari, A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The finite momentum meson spectral function (MSF) in the pseudoscalar channel is evaluated, adopting for the fermionic propagators HTL expressions. The different contributions to the meson spectral functions are clearly displayed. Our analysis may be of relevance for lattice studies of MSF based so far on the Maximum Entropy Method. As a further step the correlation function along the (imaginary-) temporal direction is evaluated.
description: 29 pages, 25 figures, submitted to Nucl.Phys.A
Complex Rational Numbers in Quantum Mechanics
Creators: name: Benioff, Paul
Publisher: name: arXiv
Year: 2005
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A binary representation of complex rational numbers and their arithmetic is described that is not based on qubits. It takes account of the fact that $0s$ in a qubit string do not contribute to the value of a number. They serve only as place holders. The representation is based on the distribution of four types of systems, corresponding to $+1,-1,+i,-i,$ along an integer lattice. Complex rational numbers correspond to arbitrary products of four types of creation operators acting on the vacuum state. An occupation number representation is given for both bosons and fermions.
description: 12 pages Contribution for Proceedings, ISSUR-05, in Int. Jour. Mod. Physics, B
Nonlinear plane waves in saturated porous media with incompressible constituents
Creators: name: Berjamin, Harold
Publisher: name: arXiv
Year: 2021
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences
subject: 74J30, 76S99

description: We consider the propagation of nonlinear plane waves in porous media within the framework of the Biot-Coussy biphasic mixture theory. The tortuosity effect is included in the model, and both constituents are assumed incompressible (Yeoh-type elastic skeleton, and saturating fluid). In this case, the linear dispersive waves governed by Biot's theory are either of compression or shear-wave type, and nonlinear waves can be classified in a similar way. In the special case of a neo-Hookean skeleton, we derive the explicit expressions for the characteristic wave speeds, leading to the hyperbolicity condition. The sound speeds for a Yeoh skeleton are estimated using a perturbation approach. Then we arrive at the evolution equation for the amplitude of acceleration waves. In general, it is governed by a Bernoulli equation. With the present constitutive assumptions, we find that longitudinal jump amplitudes follow a nonlinear evolution, while transverse jump amplitudes evolve in an almost linearly degenerate fashion.
HST/FOS Time-resolved spectral mapping of IP Pegasi at the end of an outburst
Creators: name: Saito, R. K.
name: Baptista, R.
name: Horne, K.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report an eclipse mapping analysis of time-resolved ultraviolet spectroscopy covering three eclipses of the dwarf nova IP Pegasi on the late decline of the 1993 May outburst. The eclipse maps of the first run show evidence of one spiral arm, suggesting that spiral structures may still be present in the accretion disc 9 days after the onset of the outburst. In the spatially resolved spectra the most prominent lines appear in emission at any radius, being stronger in the inner disc regions. The spectrum of the gas stream is clearly distinct from the disc spectrum in the intermediate and outer disc regions, suggesting the occurrence of gas stream overflow. The full width half maximum of C IV is approximately constant with radius, in contrast to the expected $v\propto{R^{-1/2}}$ law for a gas in Keplerian orbits. This line probably originates in a vertically extended region (chromosphere + disc wind). The uneclipsed component contributes $\sim{4}$ % of the flux in C IV in the first run, and becomes negligible in the remaining runs. We fit stellar atmosphere models to the spatially resolved spectra. The radial run of the disc color temperature for the three runs is flatter than the expected $T\propto{R^{-3/4}}$ law for steady-state optically thick discs models, with $T\simeq{20000}$ K in the inner regions and $T\simeq{9000}$ K in the outer disc regions. The solid angles that result from the fits are smaller than expected from the parameters of the system. The radial run of the solid angle suggests that the disc is flared in outburst, and decreases in thickness toward the end of the outburst.
description: 14 pages, 14 figures, in press in Astronomy & Astrophysics
Two-boson quantum interference in time
Creators: name: Cerf, Nicolas J.
name: Jabbour, Michael G.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The celebrated Hong-Ou-Mandel effect is the paradigm of two-particle quantum interference. It has its roots in the symmetry of identical quantum particles, as dictated by the Pauli principle. Two identical bosons impinging on a beam splitter (of transmittance 1/2) cannot be detected in coincidence at both output ports, as confirmed in numerous experiments with light or even matter. Here, we establish that partial time reversal transforms the beamsplitter linear coupling into amplification. We infer from this duality the existence of an unsuspected two-boson interferometric effect in a quantum amplifier (of gain 2) and identify the underlying mechanism as timelike indistinguishability. This fundamental mechanism is generic to any bosonic Bogoliubov transformation, so we anticipate wide implications in quantum physics.
description: 12 pages, 9 figures
The State of Applying Artificial Intelligence to Tissue Imaging for Cancer Research and Early Detection
Creators: name: Robben, Michael
name: Hajighasemi, Amir
name: Nasr, Mohammad Sadegh
name: Veerla, Jai Prakesh
name: Alsup, Anne M.
name: Rout, Biraaj
name: Shang, Helen H.
name: Fowlds, Kelli
name: Malidarreh, Parisa Boodaghi
name: Koomey, Paul
name: Saurav, MD Jillur Rahman
name: Luber, Jacob M.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Tissues and Organs (q-bio.TO)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Image and Video Processing (eess.IV)
subject: FOS: Biological sciences
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Artificial intelligence represents a new frontier in human medicine that could save more lives and reduce the costs, thereby increasing accessibility. As a consequence, the rate of advancement of AI in cancer medical imaging and more particularly tissue pathology has exploded, opening it to ethical and technical questions that could impede its adoption into existing systems. In order to chart the path of AI in its application to cancer tissue imaging, we review current work and identify how it can improve cancer pathology diagnostics and research. In this review, we identify 5 core tasks that models are developed for, including regression, classification, segmentation, generation, and compression tasks. We address the benefits and challenges that such methods face, and how they can be adapted for use in cancer prevention and treatment. The studies looked at in this paper represent the beginning of this field and future experiments will build on the foundations that we highlight.
Inverse centrifugal effect induced by collective motion of vortices in rotating turbulent convection
Creators: name: Ding, Shan-Shan
name: Chong, Kai Leong
name: Shi, Jun-Qiang
name: Ding, Guang-Yu
name: Lu, Hao-Yuan
name: Xia, Ke-Qing
name: Zhong, Jin-Qiang
Publisher: name: arXiv
Year: 2020
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: When a fluid system is subject to strong rotation, centrifugal fluid motion is expected, i.e., denser (lighter) fluid moves outward (inward) from (toward) the axis of rotation. Here we demonstrate, both experimentally and numerically, the existence of an unexpected outward motion of warm and lighter vortices in rotating turbulent convection. This anomalous vortex motion occurs under rapid rotations when the centrifugal buoyancy is sufficiently strong to induce a symmetry-breaking in the vorticity field, i.e., the vorticity of the cold anticyclones overrides that of the warm cyclones. We show that through hydrodynamic interactions the densely populated vortices can self-aggregate into coherent clusters and exhibit collective motion in this flow regime. Interestingly, the correlation of the vortex velocity fluctuations within a cluster is scale-free, with the correlation length being about 30% of the cluster length. Such long-range correlation leads to the collective outward motion of cyclones. Our study provides new understanding of vortex dynamics that are widely present in nature.
Radiation reaction of a classical quasi-rigid extended particle
Creators: name: Medina, Rodrigo
Publisher: name: arXiv
Year: 2005
Subjects: subject: Classical Physics (physics.class-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The problem of the self-interaction of a quasi-rigid classical particle with an arbitrary spherically symmetric charge distribution is completely solved up to the first order in the acceleration. No ad hoc assumptions are made. It is shown that most of the puzzles that this problem has aroused are due to the inertia of the negative pressure that equilibrates the electrostatic repulsion inside the particle. When the inertia of pressure is taken into account the dressed mass turns out to be the bare mass plus the electrostatic mass m=m_0 + m_e. It is shown that a proper mechanical behaviour requires that m_0 > m_e/3. This condition poses a lower bound on the radius that a particle of a given bare mass and charge may have. The violation of this condition is the reason why the Lorentz-Abraham-Dirac formula for the radiation reaction of a point charge predicts unphysical motions that run away or violate causality. Provided the mass condition is met the solutions of the exact equation of motion never run away and conform to causality and energy and momentum conservation. When the radius is much smaller than the wave-length of the radiated fields, but the mass condition is still met, the exact expression reduces to the formula that was advocated recently by Rohrlich.
description: 18 pages, IoP LaTeX, submitted to Journal of Physics A; typo corrected, minor changes in sections 1,3,4,9 add 3 references
Measurement of Charm and Beauty Dijet Cross Sections in Photoproduction at HERA using the H1 Vertex Detector
Creators: name: H1 Collaboration
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: A measurement of charm and beauty dijet photoproduction cross sections at the ep collider HERA is presented. Events are selected with two or more jets of transverse momentum $p_t^{jet}_{1(2)}>11(8)$ GeV in the central range of pseudo-rapidity $-0.9
description: 24 pages, 7 figures, 4 tables
Spin resolved Hall effect driven by spin-orbit coupling
Creators: name: Li, Jian
name: Hu, Liangbin
name: Shen, Shun-Qing
Publisher: name: arXiv
Year: 2005
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Spin and electric Hall currents are calculated numerically in a two-dimensional mesoscopic system with Rashba and Dresselhaus spin-orbit coupling by means of the Landauer-Buttiker formalism. It is found that both electric and spin Hall currents circulate when two spin-orbit couplings coexist, while the electric Hall conductance vanishes if either one is absent. The electric and spin Hall conductances are suppressed in strong disorder, but survive in weak disorder. Physically it can be understood that the spinomotive transverse "force" generated by spin-orbit coupling is responsible for the formation of the spin Hall current and the lack of transverse reflection symmetry is the origin of the electric Hall current.
description: 4 pages, 5 figures
Temporal scaling at Feigenbaum points and non-extensive thermodynamics
Creators: name: Grassberger, Peter
Publisher: name: arXiv
Year: 2005
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: We show that recent claims for the non-stationary behaviour of the logistic map at the Feigenbaum point based on non-extensive thermodynamics are either wrong or can be easily deduced from well-known properties of the Feigenbaum attractor. In particular, there is no generalized Pesin identity for this system, the existing "proofs" being based on misconceptions about basic notions of ergodic theory. In deriving several new scaling laws of the Feigenbaum attractor, thorough use is made of its detailed structure, but there is no obvious connection to non-extensive thermodynamics.
description: accepted for Phys. Rev. Lett
Infrared signatures of hole and spin stripes in La{2-x}Sr{x}CuO{4}
Creators: name: Padilla, W. J.
name: Dumm, M.
name: Komiya, Seiki
name: Ando, Yoichi
name: Basov, D. N.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We investigate the hole and lattice dynamics in a prototypical high temperature superconducting system La{2-x}Sr{x}CuO{4} using infrared spectroscopy. By exploring the anisotropy in the electronic response of CuO2 planes we show that our results support the notion of stripes. Nevertheless, charge ordering effects are not apparent in the phonon spectra. All crystals show only the expected infrared active modes for orthorhombic phases without evidence for additional peaks that may be indicative of static charge ordering. Strong electron-phonon interaction manifests itself through the Fano lineshape of several phonon modes. This analysis reveals anisotropic electron-phonon coupling across the phase diagram, including superconducting crystals. Due to the ubiquity of the CuO2 plane, these results may have implications for other high Tc superconductors.
description: 7 pages, 8 figures
Gap solitons in Bragg gratings with a harmonic superlattice
Creators: name: Yagasaki, K.
name: Merhasin, I. M.
name: Malomed, B. A.
name: Wagenknecht, T.
name: Champneys, A. R.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: Solitons are studied in a model of a fiber Bragg grating (BG) whose local reflectivity is subjected to periodic modulation. The superlattice opens an infinite number of new bandgaps in the model's spectrum. Averaging and numerical continuation methods show that each gap gives rise to gap solitons (GSs), including asymmetric and double-humped ones, which are not present without the superlattice.Computation of stability eigenvalues and direct simulation reveal the existence of completely stable families of fundamental GSs filling the new gaps - also at negative frequencies, where the ordinary GSs are unstable. Moving stable GSs with positive and negative effective mass are found too.
description: 7 pages, 3 figures, submitted to EPL
How word semantics and phonology affect handwriting of Alzheimer's patients: a machine learning based analysis
Creators: name: Cilia, Nicole Dalia
name: De Stefano, Claudio
name: Fontanella, Francesco
name: Siniscalchi, Sabato Marco
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computation and Language (cs.CL)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Using kinematic properties of handwriting to support the diagnosis of neurodegenerative disease is a real challenge: non-invasive detection techniques combined with machine learning approaches promise big steps forward in this research field. In literature, the tasks proposed focused on different cognitive skills to elicitate handwriting movements. In particular, the meaning and phonology of words to copy can compromise writing fluency. In this paper, we investigated how word semantics and phonology affect the handwriting of people affected by Alzheimer's disease. To this aim, we used the data from six handwriting tasks, each requiring copying a word belonging to one of the following categories: regular (have a predictable phoneme-grapheme correspondence, e.g., cat), non-regular (have atypical phoneme-grapheme correspondence, e.g., laugh), and non-word (non-meaningful pronounceable letter strings that conform to phoneme-grapheme conversion rules). We analyzed the data using a machine learning approach by implementing four well-known and widely-used classifiers and feature selection. The experimental results showed that the feature selection allowed us to derive a different set of highly distinctive features for each word type. Furthermore, non-regular words needed, on average, more features but achieved excellent classification performance: the best result was obtained on a non-regular, reaching an accuracy close to 90%.
Development of Biofilms that Enable the Persistence of Listeria monocytogenes in Food Processing environments Despite Adequate Sanitation Procedures
Creators: name: Burnett, Jack
Publisher: name: Purdue University Graduate School
Year: 2024
Subjects: classificationCode: 310703
subject: Microbial ecology
classificationCode: 310701
subject: Bacteriology
classificationCode: 310799
subject: Microbiology not elsewhere classified
classificationCode: 300699
subject: Food sciences not elsewhere classified

description: This thesis explores the complex relationship between Listeria monocytogenes and food processing environments (FPEs), focusing on the persistence mechanisms of this pathogen despite rigorous sanitation efforts. L. monocytogenes is a significant public health concern due to its association with high mortality rates in vulnerable populations. Recent studies, including the first chapter of this thesis, have highlighted the challenges in eradicating this pathogen from FPEs, suggesting that biofilms play a crucial role in its persistence. Despite various strategies and enhanced sanitation protocols, the eradication of L. monocytogenes remains elusive, underlining the need for a deeper understanding of its biofilm-associated resilience. Chapter two synthesizes findings from a systematic review and meta-analysis of studies examining the microbial communities on FPE surfaces through metagenomics, aiming to uncover patterns that might explain Listeria's long-term survival. In chapter three, the thesis delves into the nuanced role of biofilm composition and microbial diversity as factors enabling the persistence of Listeria monocytogenes in food processing environments (FPEs), despite comprehensive sanitation efforts. This section builds on the understanding that L. monocytogenes does not inherently form robust biofilms but thrives within complex microbial communities present on FPE surfaces. The findings presented in this thesis contribute to a more profound comprehension of L. monocytogenes' survival strategies, proposing a shift in focus towards the microbial ecosystem's metabolic interplays for the development of targeted control measures. This approach not only opens new avenues for research but also suggests practical implications for enhancing food safety protocols by considering the broader microbial dynamics at play within biofilms on FPE surfaces.
Functional PCA and Deep Neural Networks-based Bayesian Inverse Uncertainty Quantification with Transient Experimental Data
Creators: name: Xie, Ziyu
name: Yaseen, Mahmoud
name: Wu, Xu
Publisher: name: arXiv
Year: 2023
Subjects: subject: Machine Learning (stat.ML)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Inverse UQ is the process to inversely quantify the model input uncertainties based on experimental data. This work focuses on developing an inverse UQ process for time-dependent responses, using dimensionality reduction by functional principal component analysis (PCA) and deep neural network (DNN)-based surrogate models. The demonstration is based on the inverse UQ of TRACE physical model parameters using the FEBA transient experimental data. The measurement data is time-dependent peak cladding temperature (PCT). Since the quantity-of-interest (QoI) is time-dependent that corresponds to infinite-dimensional responses, PCA is used to reduce the QoI dimension while preserving the transient profile of the PCT, in order to make the inverse UQ process more efficient. However, conventional PCA applied directly to the PCT time series profiles can hardly represent the data precisely due to the sudden temperature drop at the time of quenching. As a result, a functional alignment method is used to separate the phase and amplitude information of the transient PCT profiles before dimensionality reduction. DNNs are then trained using PC scores from functional PCA to build surrogate models of TRACE in order to reduce the computational cost in Markov Chain Monte Carlo sampling. Bayesian neural networks are used to estimate the uncertainties of DNN surrogate model predictions. In this study, we compared four different inverse UQ processes with different dimensionality reduction methods and surrogate models. The proposed approach shows an improvement in reducing the dimension of the TRACE transient simulations, and the forward propagation of inverse UQ results has a better agreement with the experimental data.
description: 31 pages, 21 figures
Unusual upper critical field of the ferromagnetic superconductor UCoGe
Creators: name: Huy, N. T.
name: de Nijs, D. E.
name: Huang, Y. K.
name: de Visser, A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We report upper critical field $B_{c2}(T)$ measurements on a single-crystalline sample of the ferromagnetic superconductor UCoGe. $B_{c2}(0)$ obtained for fields applied along the orthorhombic axes exceeds the Pauli limit for $B \parallel a,b$ and shows a strong anisotropy $B_{c2}^{a} \simeq B_{c2}^{b} \gg B_{c2} ^{c}$. This provide evidence for an equal spin pairing state and a superconducting gap function of axial symmetry with point nodes along the c axis, which is also the direction of the uniaxial ferromagnetic moment $m_0 = 0.07 μ_{B}$. An unusual curvature or kink is observed in the temperature variation of $B_{c2}$, which possibly indicates UCoGe is a two-band ferromagnetic superconductor.
description: 4 pages, accepted for publication in PRL
Systematic Comparison of Software Agents and Digital Twins: Differences, Similarities, and Synergies in Industrial Production
Creators: name: Reinpold, Lasse Matthias
name: Wagner, Lukas Peter
name: Gehlhoff, Felix
name: Ramonat, Malte
name: Kilthau, Maximilian
name: Gill, Milapji Singh
name: Reif, Jonathan Tobias
name: Henkel, Vincent
name: Scholz, Lena
name: Fay, Alexander
Publisher: name: arXiv
Year: 2023
Subjects: subject: Software Engineering (cs.SE)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: To achieve a highly agile and flexible production, it is envisioned that industrial production systems gradually become more decentralized, interconnected, and intelligent. Within this vision, production assets collaborate with each other, exhibiting a high degree of autonomy. Furthermore, knowledge about individual production assets is readily available throughout their entire life-cycles. To realize this vision, adequate use of information technology is required. Two commonly applied software paradigms in this context are Software Agents (referred to as Agents) and Digital Twins (DTs). This work presents a systematic comparison of Agents and DTs in industrial applications. The goal of the study is to determine the differences, similarities, and potential synergies between the two paradigms. The comparison is based on the purposes for which Agents and DTs are applied, the properties and capabilities exhibited by these software paradigms, and how they can be allocated within the Reference Architecture Model Industry 4.0. The comparison reveals that Agents are commonly employed in the collaborative planning and execution of production processes, while DTs typically play a more passive role in monitoring production resources and processing information. Although these observations imply characteristic sets of capabilities and properties for both Agents and DTs, a clear and definitive distinction between the two paradigms cannot be made. Instead, the analysis indicates that production assets utilizing a combination of Agents and DTs would demonstrate high degrees of intelligence, autonomy, sociability, and fidelity. To achieve this, further standardization is required, particularly in the field of DTs.
description: Manuscript submitted to Journal of Intelligent Manufacturing, Corresponding dataset: https://doi.org/10.5281/zenodo.8120623 Additional references in Sec. 1, some other minor changes
Towards a population-informed approach to the definition of data-driven models for structural dynamics
Creators: name: Tsialiamanis, G.
name: Dervilis, N.
name: Wagg, D. J.
name: Worden, K.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Machine Learning (cs.LG)
subject: Artificial Intelligence (cs.AI)
subject: Signal Processing (eess.SP)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Machine learning has affected the way in which many phenomena for various domains are modelled, one of these domains being that of structural dynamics. However, because machine-learning algorithms are problem-specific, they often fail to perform efficiently in cases of data scarcity. To deal with such issues, combination of physics-based approaches and machine learning algorithms have been developed. Although such methods are effective, they also require the analyser's understanding of the underlying physics of the problem. The current work is aimed at motivating the use of models which learn such relationships from a population of phenomena, whose underlying physics are similar. The development of such models is motivated by the way that physics-based models, and more specifically finite element models, work. Such models are considered transferrable, explainable and trustworthy, attributes which are not trivially imposed or achieved for machine-learning models. For this reason, machine-learning approaches are less trusted by industry and often considered more difficult to form validated models. To achieve such data-driven models, a population-based scheme is followed here and two different machine-learning algorithms from the meta-learning domain are used. The two algorithms are the model-agnostic meta-learning (MAML) algorithm and the conditional neural processes (CNP) model. The algorithms seem to perform as intended and outperform a traditional machine-learning algorithm at approximating the quantities of interest. Moreover, they exhibit behaviour similar to traditional machine learning algorithms (e.g. neural networks or Gaussian processes), concerning their performance as a function of the available structures in the training population.
Gamma Ray Bursts: recent results obtained by the SWIFT mission
Creators: name: Chincarini, G.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: In the introduction we give the main characteristics of the Swift mission outlining how the design was driven by the science goals and by the heritage we got from the Italian - Dutch satellite Beppo SAX. We show some of the new characteristics of the X - ray light curves that became evident soon after we obtained the first set of data. In addition to the early phase steep slope afterglow discovered by Swift, we discuss the frequently observed GRB flares and the first localization of a short burst.
description: Comments: 9 pages, 5 figures. To be published in the Proceedings of the Third workshop on Science with the new generation of High Gamma Ragy Experiments, Cividale del Friuli, Italy, May 30
Detection of 75+ pulsation frequencies in the Delta Scuti star FG Vir
Creators: name: Breger, M.
name: Lenz, P.
name: Antoci, V.
name: Guggenberger, E.
name: Shobbrook, R. R.
name: Handler, G.
name: Ngwato, B.
name: Rodler, F.
name: Rodriguez, E.
name: de Coca, P. Lopez
name: Rolland, A.
name: Costa, V.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Extensive photometric multisite campaigns of the Delta Scuti variable FG Vir are presented. For the years 2003 and 2004, 926 hours of photometry at the millimag precision level were obtained. The combinations with earlier campaigns lead to excellent frequency resolution and high signal/noise. A multifrequency analysis yields 79 frequencies. This represents a new record for this type of star. The modes discovered earlier were confirmed. Pulsation occurs over a wide frequency band from 5.7 to 44.3 c/d with amplitudes of 0.2 mmag or larger. Within this wide band the frequencies are not distributed at random, but tend to cluster in groups. A similar feature is seen in the power spectrum of the residuals after 79 frequencies are prewhitened. This indicates that many additional modes are excited. The interpretation is supported by a histogram of the photometric amplitudes, which shows an increase of modes with small amplitudes. The old question of the 'missing modes' may be answered now: the large number of detected frequencies as well as the large number of additional frequencies suggested by the power spectrum of the residuals con rms the theoretical prediction of a large number of excited modes. FG Vir shows a number of frequency combinations of the dominant mode at 12.7162 c/d (m = 0) with other modes of relatively high photometric amplitudes. The amplitudes of the frequency sums are higher than those of the differences. A second mode (20.2878 c/d) also shows combinations. This mode of azimuthal order m = -1 is coupled with two other modes of m = +1.
description: 12 pages, 6 figures, 4 tables, accepted by Astronomy and Astrophysics
The growth of COVID-19 scientific literature: A forecast analysis of different daily time series in specific settings
Creators: name: Torres-Salinas, Daniel
name: Robinson-Garcia, Nicolas
name: van Schalkwyk, François
name: Nane, Gabriela F.
name: Castillo-Valdivieso, Pedro
Publisher: name: arXiv
Year: 2021
Subjects: subject: Digital Libraries (cs.DL)
subject: FOS: Computer and information sciences

description: We present a forecasting analysis on the growth of scientific literature related to COVID-19 expected for 2021. Considering the paramount scientific and financial efforts made by the research community to find solutions to end the COVID-19 pandemic, an unprecedented volume of scientific outputs is being produced. This questions the capacity of scientists, politicians and citizens to maintain infrastructure, digest content and take scientifically informed decisions. A crucial aspect is to make predictions to prepare for such a large corpus of scientific literature. Here we base our predictions on the ARIMA model and use two different data sources: the Dimensions and World Health Organization COVID-19 databases. These two sources have the particularity of including in the metadata information the date in which papers were indexed. We present global predictions, plus predictions in three specific settings: type of access (Open Access), NLM source (PubMed and PMC), and domain-specific repository (SSRN and MedRxiv). We conclude by discussing our findings.
description: Paper accepted for the 2021 ISSI Conference
Spinon continuum in the Heisenberg quantum chain compound Sr$_2$V$_3$O$_9$
Creators: name: Gao, Shang
name: Lin, Ling-Fang
name: Laurell, Pontus
name: Chen, Qiang
name: Huang, Qing
name: Cruz, Clarina dela
name: Vemuru, Krishnamurthy V.
name: Lumsden, Mark D.
name: Nagler, Stephen E.
name: Alvarez, Gonzalo
name: Dagotto, Elbio
name: Zhou, Haidong
name: Christianson, Andrew D.
name: Stone, Matthew B.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Magnetic excitations in the spin chain candidate Sr$_2$V$_3$O$_9$ have been investigated by inelastic neutron scattering on a single crystal sample. A spinon continuum with a bandwidth of $\sim22$ meV is observed along the chain formed by alternating magnetic V$^{4+}$ and nonmagnetic V$^{5+}$ ions. Incipient magnetic Bragg peaks due to weak ferromagnetic interchain couplings emerge when approaching the magnetic transition at $T_N\sim 5.3$ K while the excitations remain gapless within the instrumental resolution. Comparisons to the Bethe ansatz, density matrix renormalization group (DMRG) calculations, and effective field theories confirm Sr$_2$V$_3$O$_9$ as a host of weakly coupled $S = 1/2$ chains dominated by antiferromagnetic intrachain interactions of $\sim7.1$(1) meV.
description: 19 pages, 9 figures
UV Dispersive Effects on Hawking Radiation
Creators: name: Akhmedov, Emil T.
name: Chau, Tin-Long
name: Ho, Pei-Ming
name: Kawai, Hikaru
name: Shao, Wei-Hsiang
name: Wang, Cheng-Tsung
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We revisit the connection between Hawking radiation and high-frequency dispersions for a Schwarzschild black hole following the work of Brout et al.. After confirming the robustness of Hawking radiation for monotonic dispersion relations, we consider non-monotonic dispersion relations that deviate from the standard relation only in the trans-Planckian domain. Contrary to the common belief that Hawking radiation is insensitive to UV physics, it turns out that Hawking radiation is subject to significant modifications after the scrambling time. Depending on the UV physics at the singularity, the amplitude of Hawking radiation could diminish after the scrambling time, while the Hawking temperature remains the same. Our finding is thus not contradictory to earlier works regarding the robustness of Hawking temperature.
description: 24 pages, 8 figures; v2: minor changes, references added; v3: relation to Parikh-Wilczek tunneling clarified, factors of 2 corrected
Chaotic itinerancy, temporal segmentation and spatio-temporal combinatorial codes
Creators: name: Dias, Juliana R.
name: Oliveira, Rodrigo F.
name: Kinouchi, Osame
Publisher: name: arXiv
Year: 2006
Subjects: subject: Neurons and Cognition (q-bio.NC)
subject: FOS: Biological sciences

description: We study a deterministic dynamics with two time scales in a continuous state attractor network. To the usual (fast) relaxation dynamics towards point attractors (``patterns'') we add a slow coupling dynamics that makes the visited patterns to loose stability leading to an itinerant behavior in the form of punctuated equilibria. One finds that the transition frequency matrix between patterns shows non-trivial statistical properties in the chaotic itinerant regime. We show that mixture input patterns can be temporally segmented by the itinerant dynamics. The viability of a combinatorial spatio-temporal neural code is also demonstrated.
Searching for active low-mass stars in CMa star-forming region: multi-band photometry with T80S
Creators: name: Gregorio-Hetem, J.
name: Navarete, F.
name: Hetem, A.
name: Santos-Silva, T.
name: Galli, P. A. B.
name: Fernandes, B.
name: Montmerle, T.
name: Jatenco-Pereira, V.
name: Fernandes, M. Borges
name: Perottoni, H. D.
name: Schoenell, W.
name: Ribeiro, T.
name: Kanaan, A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: An exotic environment surrounds the young stellar groups associated with the Canis Major (CMa) OB1/R1 region, which probably was formed under feedback from at least three supernova events having occurred a few million years ago. We use astrometric data from the Gaia-DR2 to confirm the membership of the stars in CMa R1, based on proper motion and parallax, which revealed 514 new members and candidates. The mean age of 5 Myr estimated from the color-magnitude diagram characterizes the sources as likely pre-main sequence candidates. In total, a sample of 694 stars detected with the T80-South telescope was analyzed according to different color-color diagrams, which were compared with theoretical colors from evolutionary models, aiming to reveal the objects that exhibit color excess due to accretion processes. Accretion and magnetic activity were also explored on the basis of empirical flux-flux relation, such as F660 and F861 that are related to Halpha and Ca II triplet emission, respectively. A low fraction (3 percent) of the sample have Halpha excess and other colors expected for stars exhibiting chromospheric activity. The number of Class I and Class II objects, identified by the infrared (WISE) colors, indicates a disk fraction of 6 percent, which is lower than the expected for stellar clusters with similar age. A such large sample of objects associated with CMa R1 without evidences of circumstellar accretion can be interpreted as a lack of disk-bearing stars, unusual for young star-forming regions. However, this may be explained as the result of supernova events.
description: 29 pages, 9 tables, 11 figures, accepted for publication in The Astronomical Journal