cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Additional file 1 of Maternal and infant outcomes of pregnancy associated with anti-SSA/RO antibodies: a systematic review and meta-analysis
Creators: name: Sheng, Xiangrui
name: Song, Xiaohui
name: Xiong, Yue
name: Ren, Tian
name: Chang, Xin
name: Wu, Jian
name: Cao, Jing
name: Cheng, Tao
name: Wang, Mingjun
Publisher: name: figshare
Year: 2023
Subjects: subject: Medicine
subject: Cell Biology
subject: Pharmacology
subject: Biotechnology
subject: Immunology
subject: FOS: Clinical medicine
subject: Mathematical Sciences not elsewhere classified
subject: Mental Health

description: Additional file 1: Fig. S1. The prevalence of CHB between SLE and non-SLE groups. Fig. S2. Subgroup analysis of different types of diagnostic method. Fig. S3. Subgroup analysis based on regions of studies. Fig. S4. Subgroup analysis based on publication time. Fig. S5. Sensitivity analysis.
The coherent motions of thermal active Brownian particles
Creators: name: Yang, Cheng
name: Zeng, Ying
name: Xu, Shun
name: Zhou, Xin
Publisher: name: arXiv
Year: 2022
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Active matter exhibits many intriguing non-equilibrium character, \emph{e.g.}, the active Brownian particles (ABP) without any attractive and aligned interactions can occur the mobility-induced phase transition to form some dense domains with both the structural ordering and dynamical coherence. Recently, the velocity correlation among the particles in the dense and ordered clusters was found in athermal ABP systems, however, seemed to disappear if including the thermal noises to describe microscopic ABPs, bringing some confusion about the generality of the consistence between structure and dynamics in ABPs. Here we demonstrate that the thermal noises imposing a large random term on the instantaneous velocity of ABPs hinder the observation of the (small) correlation in motions of ABPs. By averaging the instantaneous velocity (or equivalently, calculating the displacement) in various lag times, we show that the motions of thermal-fluctuated ABPs in the one order of magnitude smaller than the translational characteristic time are highly coherent and consistent spatially with the structural ordering of the ABPs.
Phase estimation for thermal Gaussian states
Creators: name: Aspachs, M.
name: Calsamiglia, J.
name: Munoz-Tapia, R.
name: Bagan, E.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We give the optimal bounds on the phase-estimation precision for mixed Gaussian states in the single-copy and many-copy regimes. Specifically, we focus on displaced thermal and squeezed thermal states. We find that while for displaced thermal states an increase in temperature reduces the estimation fidelity, for squeezed thermal states a larger temperature can enhance the estimation fidelity. The many-copy optimal bounds are compared with the minimum variance achieved by three important single-shot measurement strategies. We show that the single-copy canonical phase measurement does not always attain the optimal bounds in the many-copy scenario. Adaptive homodyning schemes do attain the bounds for displaced thermal states, but for squeezed states they yield fidelities that are insensitive to temperature variations and are, therefore, sub-optimal. Finally, we find that heterodyne measurements perform very poorly for pure states but can attain the optimal bounds for sufficiently mixed states. We apply our results to investigate the influence of losses in an optical metrology experiment. In the presence of losses squeezed states cease to provide Heisenberg limited precision and their performance is close to that of coherent states with the same mean photon number.
description: typos corrected
Interaction-driven phase transition in one dimensional mirror-symmetry protected topological insulator
Creators: name: Bhakuni, Devendra Singh
name: Ghosh, Amrita
name: Grosfeld, Eytan
Publisher: name: arXiv
Year: 2022
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Topological crystalline insulators are phases of matter where the crystalline symmetries solely protect the topology. In this work, we explore the effect of many-body interactions in a subclass of topological crystalline insulators, namely the mirror-symmetry protected topological crystalline insulator. Employing a prototypical mirror-symmetric quasi-one-dimensional model, we demonstrate the emergence of a mirror-symmetry protected topological phase and its robustness in the presence of short-range interactions. When longer-range interactions are introduced, we find an interaction-induced topological phase transition between the mirror-symmetry protected topological order and a trivial charge density wave. The results are obtained using density-matrix renormalization group and quantum Monte-Carlo simulations in applicable limits.
Pion charge form factor and constraints from space-time translations
Creators: name: Desplanques, Bertrand
name: Dong, Yu Bing
Publisher: name: arXiv
Year: 2010
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The role of Poincaré covariant space-time translations is investigated in the case of a relativistic quantum mechanics approach to the pion charge form factor. It is shown that the related constraints are generally inconsistent with the assumption of a single-particle current, which is most often referred to. The only exception is the front-form approach with $q^+=0$. How accounting for the related constraints, as well as restoring the equivalence of different RQM approaches in estimating form factors, is discussed. Some extensions of this work and, in particular, the relationship with a dispersion-relation approach, are presented. Conclusions relative to the underlying dynamics are given.
description: 6 pages, 2 figures, proceedings of the QNP2009 international conference (Beijing, oct. 2009), to be published in Chinese Physics C
Quantum Friction near the Instability Threshold
Creators: name: Oue, Daigo
name: Shapiro, Boris
name: Silveirinha, Mário G.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: In this work, we develop an analytical framework to understand quantum friction across distinct stability regimes, providing approximate expressions for frictional forces both in the deep stable regime and near the critical threshold of instability. Our primary finding is analytical proof that, near the instability threshold, the quantum friction force diverges logarithmically. This result, verified through numerical simulations, sheds light on the behavior of frictional instabilities as the system approaches criticality.
 Our findings offer new insights into the role of instabilities, critical divergence and temperature in frictional dynamics across quantum and classical regimes.
Radiative transfer in very optically thick circumstellar disks
Creators: name: Min, M.
name: Dullemond, C. P.
name: Dominik, C.
name: de Koter, A.
name: Hovenier, J. W.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: In this paper we present two efficient implementations of the diffusion approximation to be employed in Monte Carlo computations of radiative transfer in dusty media of massive circumstellar disks. The aim is to improve the accuracy of the computed temperature structure and to decrease the computation time. The accuracy, efficiency and applicability of the methods in various corners of parameter space are investigated. The effects of using these methods on the vertical structure of the circumstellar disk as obtained from hydrostatic equilibrium computations are also addressed. Two methods are presented. First, an energy diffusion approximation is used to improve the accuracy of the temperature structure in highly obscured regions of the disk, where photon counts are low. Second, a modified random walk approximation is employed to decrease the computation time. This modified random walk ensures that the photons that end up in the high-density regions can quickly escape to the lower density regions, while the energy deposited by these photons in the disk is still computed accurately. A new radiative transfer code, MCMax, is presented in which both these diffusion approximations are implemented. These can be used simultaneously to increase both computational speed and decrease statistical noise. We conclude that the diffusion approximations allow for fast and accurate computations of the temperature structure, vertical disk structure and observables of very optically thick circumstellar disks.
description: Accepted for publication in A&A
The thermodynamic efficiency of the Lorenz system
Creators: name: López, Álvaro G.
name: Benito, Fernando
name: Sabuco, Juan
name: Delgado-Bonal, Alfonso
Publisher: name: arXiv
Year: 2022
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: We study the thermodynamic efficiency of the Malkus-Lorenz waterwheel. For this purpose, we derive an exact analytical formula that describes the efficiency of this dissipative structure as a function of the phase space variables and the constant parameters of the dynamical system. We show that, generally, as the machine is progressively driven far from thermodynamic equilibrium by increasing its uptake of matter from the environment, it also tends to increase its efficiency. However, sudden drops in the efficiency are found at critical bifurcation points leading to chaotic dynamics. We relate these discontinuous crises in the efficiency to a reduction of the attractor's average value projected along the phase space dimensions that contribute to the rate of entropy generation in the system. In this manner, we provide a thermodynamic criterion that, presumably, governs the evolution of far-from-equilibrium dissipative systems towards their self-assembly and synchronization into increasingly complex networks and structures.
Magnetic penetration depth and gap symmetry of the noncentrosymmetric superconductors CePt3Si and LaPt3Si
Creators: name: Ribeiro, R. L.
name: Bonalde, I.
name: Haga, Y.
name: Settai, R.
name: Onuki, Y.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We report on measurements of the temperature dependence of the magnetic penetration depth of a very high quality single crystal of nonmagnetic superconductor LaPt3Si without inversion symmetry. The results are compared with those previously reported for the isostructural antiferromagnetic superconductor CePt3Si. At low temperatures, the penetration depth follows a BCS exponential behavior that implies an isotropic energy gap in LaPt3Si, in contrast to a linear response that indicates line nodes in CePt3Si. These line nodes have been argued to be protected by symmetry or accidentally generated by parity mixing. The present results provide support for the viewpoint that parity mixing alone does not seem to lead to unconventionality in CePt3Si and that it requires the antiferromagnetic order to be included.
description: Version as appeared in JPSJ
"New Space" use cases permitted by Radiation Tolerant Space qualified Compute intensive processors, memories and modules solutions from Teledyne e2v
Creators: name: Porchez, Thomas
name: Mikaël Ball
Publisher: name: Zenodo
Year: 2021
Subjects: obdp
obdp2021
on-board processing

description: While seeking the highest amount of protection and reliability in Space (against harsh environments, radiations) has nailed down for a long time the computing performances of Space systems towards low levels versus commercially available devices, some recent use-cases would probably push this into the opposite direction, i.e. much higher amounts of computing capabilities with lower but decent tolerance to Space constraints. Therefore, New Space systems’ designers may think the specifications of their systems differently, with new compromises. Yesterday’s requirements for high protections / low CPU may be transformed into mitigating the protection levels for a disruptive amount of CPU.
 Teledyne e2v has chosen for long to offer radiation tolerant Gigahertz class compute intensive devices for Space payloads and platforms. Recently, the most powerful CPU for the Space market was introduced, a Quad ARM® Cortex®-A72 (30,000 DMIPS), as well as high-speed high density DDR4 memory (4GB - gigabytes).

 A substantial amount of radiation testing campaigns on these Teledyne e2v Space parts have allowed to characterize all of them against radiations, to provide reports, guidelines, mitigation schemes to their users.
 Those characterizations against radiation effects are perfectly complementing the inherent Space quality level and robustness of Teledyne e2v parts (QML-Y or ECSS/NASA grades).

 This paper presents the radiation testing techniques, results and qualification levels of Teledyne e2v’s high capability compute intensive components.
 Results on LS1046-Space (Radiation Tolerant Quad ARM Cortex-A72), DDR4T04G72 (Radiation Tolerant high speed compact 4GB DDR4), and Qormino® QLS1046-4GB-Space (compact computing module embedding LS1046-Space & DDR4T04G72 components) will be presented. These results highlight that latest campaigns on TID and SEE (SEU, SEFIs) performed by Teledyne e2v allow any designer of Space systems to consider those devices.

 In order to better understand the level of computing capabilities from Teledyne e2v components, and how their usage allow to contemplate very modern use cases for Space, this paper also presents example of applications that can be considered with such components. A specific focus, is made on the preliminary results obtained on a project aiming at using Qormino for Artificial Intelligence (AI) in Earth observation applications. In particular, benchmark activities were performed to evaluate the Qormino performance on classical neural networks, and compare it with standard components. Some extracts of this benchmark study are presented, in order to outlook what the new space applications may foresee and benefit from safe Space qualified compute intensive parts.
FlowTune: End-to-end Automatic Logic Optimization Exploration via Domain-specific Multi-armed Bandit
Creators: name: Neto, Walter Lau
name: Li, Yingjie
name: Gaillardon, Pierre-Emmanuel
name: Yu, Cunxi
Publisher: name: arXiv
Year: 2022
Subjects: subject: Hardware Architecture (cs.AR)
subject: FOS: Computer and information sciences

description: Recent years have seen increasing employment of decision intelligence in electronic design automation (EDA), which aims to reduce the manual efforts and boost the design closure process in modern toolflows. However, existing approaches either require a large number of labeled data and expensive training efforts, or are limited in practical EDA toolflow integration due to computation overhead. This paper presents a generic end-to-end sequential decision making framework FlowTune for synthesis tooflow optimization, with a novel high-performance domain-specific, multi-stage multi-armed bandit (MAB) approach. This framework addresses optimization problems on Boolean optimization problems such as a) And-Inv-Graphs (# nodes), b) Conjunction Normal Form (CNF) minimization (# clauses) for Boolean Satisfiability; logic synthesis and technology mapping problems such as c) post static timing analysis (STA) delay and area optimization for standard-cell technology mapping, and d) FPGA technology mapping for 6-in LUT architectures. Moreover, we demonstrate the high extnsibility and generalizability of the proposed domain-specific MAB approach with end-to-end FPGA design flow, evaluated at post-routing stage, with two different FPGA backend tools (OpenFPGA and VPR) and two different logic synthesis representations (AIGs and MIGs). FlowTune is fully integrated with ABC [1], Yosys [2], VTR [3], LSOracle [4], OpenFPGA [5], and industrial tools, and is released publicly. The experimental results conducted on various design stages in the flow all demonstrate that our framework outperforms both hand-crafted flows [1] and ML explored flows [6], [7] in quality of results, and is orders of magnitude faster compared to ML-based approaches.
description: 13 pages
Non-Markovian to Markovian decay in structured environments with correlated disorder
Creators: name: Monteiro, Mariana O.
name: Bernardes, Nadja K.
name: Broni, Eugene M.
name: de Moura, Francisco A. B. F.
name: Almeida, Guilherme M. A.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Manipulating the dynamics of open quantum systems is a crucial requirement for large-scale quantum computers. Finding ways to overcome or extend decoherence times is a challenging task. Already at the level of a single two-level atom, its reduced dynamics with respect to a larger environment can be very complex. Structured environments, for instance, can lead to various regimes other than memoryless Markovian spontaneous emission. Here, we consider an atom coupled to an array of coupled cavities in the presence of on-site correlated disorder. The correlation is long-ranged and associated with the trace of a fractional Brownian motion following a power-law spectrum. With the cavity modes playing the role of the environment, we study the dynamics of the spontaneous emission. We observe a change from non-Markovian to Markovian decay in the presence of disorder by tuning the correlation parameter. This is associated with a localization-delocalization transition involving the field modes. Two dissipative models that effectively reproduce the behavior of the non-Markovianity are discussed. The dissipation dynamics of the atom can thus be used to extract information about the phase of the environment. Our results provide a direction in the engineering of disordered quantum systems to function as controllable reservoirs.
description: 9 pages, 5 figures
Chuanjiang Haozi: The Musical Expression and Spiritual Symbolism of Sichuan and Chongqing Boatmen Culture
Creators: name: Zhuo, Ding
Publisher: name: Zenodo
Year: 2024

description: Chuanjiang Haozi, a traditional music originating from Sichuan Province and Chongqing, is a national intangible cultural heritage of China. Chuanjiang Haozi is the unified movement and rhythm of the boatmen, and it is the labor Haozi sung by the boatmen working in the Chuanjiang area of China. Led by the number worker and assisted by all the boatmen, it is a kind of folk singing form of leading and singing together. It is a song of life cast by blood and sweat when the boatmen fight against the dangerous shoals and vicious waters. Chuanjiang Haozi contains the spirit of perseverance, mutual help and cooperation, optimism and openness of the working people living in the river. This paper mainly focuses on Bayu folk music Chuanjiang Haozi as the research object, the first part introduces the geographical environment of Chuanjiang, the second part is the birth and development of Chuanjiang Haozi, the third part is the main concentrated form of Chuanjiang Haozi, more in-depth understanding of Chuanjiang Haozi. Focusing on the historical development of Chuanjiang Haozi, the study of its spiritual connotation and the inheritance of The Times will help us to better understand this folk art. Chuanjiang Haozi inherits the essence of Chinese national culture and contains a high value of music art.
Harnessing Scale and Physics: A Multi-Graph Neural Operator Framework for PDEs on Arbitrary Geometries
Creators: name: Li, Zhihao
name: Song, Haoze
name: Xiao, Di
name: Lai, Zhilu
name: Wang, Wei
Publisher: name: arXiv
Year: 2024
Subjects: subject: Machine Learning (cs.LG)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Partial Differential Equations (PDEs) underpin many scientific phenomena, yet traditional computational approaches often struggle with complex, nonlinear systems and irregular geometries. This paper introduces the AMG method, a Multi-Graph neural operator approach designed for efficiently solving PDEs on Arbitrary geometries. AMG leverages advanced graph-based techniques and dynamic attention mechanisms within a novel GraphFormer architecture, enabling precise management of diverse spatial domains and complex data interdependencies. By constructing multi-scale graphs to handle variable feature frequencies and a physics graph to encapsulate inherent physical properties, AMG significantly outperforms previous methods, which are typically limited to uniform grids. We present a comprehensive evaluation of AMG across six benchmarks, demonstrating its consistent superiority over existing state-of-the-art models. Our findings highlight the transformative potential of tailored graph neural operators in surmounting the challenges faced by conventional PDE solvers. Our code and datasets are available on https://github.com/lizhihao2022/AMG.
description: Proceedings of the 31st ACM SIGKDD Conference on Knowledge Discovery and Data Mining V.1 (KDD '25)
Maximal surfaces and the universal Teichmüller space
Creators: name: Bonsante, Francesco
name: Schlenker, Jean-Marc
Publisher: name: arXiv
Year: 2009
Subjects: subject: Differential Geometry (math.DG)
subject: Complex Variables (math.CV)
subject: Geometric Topology (math.GT)
subject: FOS: Mathematics

description: We show that any element of the universal Teichmüller space is realized by a unique minimal Lagrangian diffeomorphism from the hyperbolic plane to itself. The proof uses maximal surfaces in the 3-dimensional anti-de Sitter space. We show that, in $AdS^{n+1}$, any subset $E$ of the boundary at infinity which is the boundary at infinity of a space-like hypersurface bounds a maximal space-like hypersurface. In $AdS^3$, if $E$ is the graph of a quasi-symmetric homeomorphism, then this maximal surface is unique, and it has negative sectional curvature. As a by-product, we find a simple characterization of quasi-symmetric homeomorphisms of the circle in terms of 3-dimensional projective geometry.
description: 31 pages, 3 figures
Pulsed nuclear magnetic resonance in metal single crystals
Creators: name: McLachlan, Leslie Allan
Publisher: name: University of British Columbia
Year: 2011

description: Spin-lattice relaxation times have been measured in metal single crystals with a pulsed nuclear magnetic resonance apparatus at both room and liquid nitrogen- temperatures. The values obtained for aluminum and vanadium agreed well with the values given in the literature for powdered samples. The niobium value was slightly lower than the most reliable powder value, possibly because of impurities. Measurements were made on isotopically pure tin to see if any anisotropy could be detected in the spin-lattice relaxation time. No anisotropy could be detected, but the crystal orientation used was so unfavourable that an anisotropy of less than about 50% could not be detected. The spin-spin relaxation time was measured in the isotopically pure tin for five different magnetic field orientations. These showed that exchange narrowing occurred. With a suitable choice of operating conditions, the apparatus measured the equivalent of the absorption mode in steady state nuclear magnetic resonance as a function of magnetic field orientation. This was combined with the spin-spin measurements to give the complete orientation dependence of the latter. These measurements gave a value of (2.1±0.3)Kc/s. for the pseudo-exchange constant in tin. The pseudo-dipolar second moment was found to be twice the dipolar second moment. Spin echoes were observed in the isotopically pure tin and were used to measure the spin-spin relaxation time. These gave values which were much shorter than those measured by free induction decays. The reason for this was not determined.
A comparison estimate for singular $p$-Laplace equations and its consequences
Creators: name: Nguyen, Quoc-Hung
name: Phuc, Nguyen Cong
Publisher: name: arXiv
Year: 2022
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 35J92, 35J70, 35J62

description: Comparison estimates are an important technical device in the study of regularity problems for quasilinear possibly degenerate elliptic and parabolic equations. Such tools have been employed indispensably in many papers of Mingione, Duzaar-Mingione, and Kuusi-Mingione, etc. on certain measure datum problems to obtain pointwise bounds for solutions and their full or fractional derivatives in terms of appropriate linear or nonlinear potentials. However, a comparison estimate for $p$-Laplace type elliptic equations with measure data is still unavailable in the strongly singular case $1< p\leq \frac{3n-2}{2n-1}$, where $n\geq 2$ is the dimension of the ambient space. This issue will be completely resolved in this work by proving a comparison estimate in a slightly larger range $1
description: 20 pages
Formação de agentes públicos como fator de mudança em licitações
Creators: name: Fortini, Cristiana
Publisher: name: figshare
Year: 2021
Subjects: subject: 180103 Administrative Law
subject: FOS: Law

description: Contratações públicas demanda acurado olhar direcionado não apenas às regras do procedimento licitatório, com vistas a pavimentar o caminho da boa contratação, mas também à formação dos agentes públicos que lidam com o tema. Não haverá ganho real de eficiência, ainda que se introduzam novas modalidades de licitação, altere-se o critério para a seleção do vencedor, aperfeiçoe-se a regra condutora da fase de habilitação, se os agentes encarregados do percurso, desde a sua origem até a execução do contrato, são despreparados.
Algorithmic Computability and Approximability of Capacity-Achieving Input Distributions
Creators: name: Boche, Holger
name: Schaefer, Rafael F.
name: Poor, H. Vincent
Publisher: name: arXiv
Year: 2022
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: The capacity of a channel can usually be characterized as a maximization of certain entropic quantities. From a practical point of view it is of primary interest to not only compute the capacity value, but also to find the corresponding optimizer, i.e., the capacity-achieving input distribution. This paper addresses the general question of whether or not it is possible to find algorithms that can compute the optimal input distribution depending on the channel. For this purpose, the concept of Turing machines is used which provides the fundamental performance limits of digital computers and therewith fully specifies which tasks are algorithmically feasible in principle. It is shown for discrete memoryless channels that it is impossible to algorithmically compute the capacity-achieving input distribution, where the channel is given as an input to the algorithm (or Turing machine). Finally, it is further shown that it is even impossible to algorithmically approximate these input distributions.
description: IEEE Transactions on Information Theory
The property of maximal transcendentality in the N=4 SYM
Creators: name: Kotikov, A. V.
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We show results for the universal anomalous dimension gamma_{uni}(j) of Wilson twist-2 operators in the N=4 Supersymmetric Yang-Mills theory in the first three orders of perturbation theory. These expressions are obtained by extracting the most complicated contributions from the corresponding anomalous dimensions in QCD.
description: 6 pages, published in the Proceedings of International Bogolyubov Conference "Problems of Theoretical and Mathematical Physics" (dedicated to the 100th anniversary of the birth of N.N. Bogolyubov (1909-1992)), Dubna, Russia, August 21 - 27, 2009 (Phys.Part.Nucl. in press)
Small monoids generating varieties with uncountably many subvarieties
Creators: name: Gusev, Sergey V.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 20M07

description: An algebra that generates a variety with uncountably many subvarieties is said to be of type $2^{\aleph_0}$. We show that the Rees quotient monoid $M(aabb)$ of order ten is of type $2^{\aleph_0}$, thereby affirmatively answering a recent question of Glasson. As a corollary, we exhibit a new example of type $2^{\aleph_0}$ monoid of order six, which turns out to be minimal and the first of its kind that is finitely based.
Coherent Patterning of Matter Waves with Subwavelength Localization
Creators: name: Mompart, J.
name: Ahufinger, V.
name: Birkl, G.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: Other Condensed Matter (cond-mat.other)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We propose the Subwavelength Localization via Adiabatic Passage (SLAP) technique to coherently achieve state-selective patterning of matter waves well beyond the diffraction limit. The SLAP technique consists in coupling two partially overlapping and spatially structured laser fields to three internal levels of the matter wave yielding state-selective localization at those positions where the adiabatic passage process does not occur. We show that by means of this technique matter wave localization down to the single nanometer scale can be achieved. We analyze in detail the potential implementation of the SLAP technique for nano-lithography with an atomic beam of metastable Ne* and for coherent patterning of a two-component 87Rb Bose-Einstein condensate.
description: 6 pages, 5 figures
Central factorial numbers associated with sequences of polynomials
Creators: name: Kim, Dae san
name: Kim, Taekyun
Publisher: name: arXiv
Year: 2022
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 05A19, 05A40, 11B73, 11B83

description: Many important special numbers appear in the expansions of some polynomials in terms of central factorials and vice versa, for example central factorial numbers, degenerate central factorial numbers, and central Lah numbers which are recently introduced. Here we generalize this to any sequence of polynomials. Let P be the space of a sequence of polynomials such that the degree of the polynomials less than n . The aim of this paper is to study the central factorial numbers of the second associated with P and of the first kind associated with P, in a unified and systematic way with the help of umbral calculus technique. The central factorial numbers associated with P enjoy orthogonality and inverse relations. We illustrate our results with many examples and obtain interesting orthogonality and inverse relations by applying such relations for the central factorial numbers associated with P to each of our examples.
description: 39 pages. arXiv admin note: substantial text overlap with arXiv:2202.11306
Non-equilibrium particle number fluctuations
Creators: name: Enns, Ernest Gerhard
Publisher: name: University of British Columbia
Year: 2011

description: The fluctuations of the constituent populations in a multi-level system are considered as applied to a three and four level semiconductor model. It is shown that under certain conditions the fluctuations of the electron numbers in the conduction band can be super-poisson, defined as having a variance greater than the mean number. The general autocorrelation function for a three level system is obtained. For certain limits, this correlation function is the sum of two damped sinusoidal terms. This would indicate there is an oscillatory interaction between the population numbers. The photon distribution as a function of position within a one-dimensional active medium is derived. When two partially reflecting mirrors are situated at both ends of the medium, the stationary photon distribution obtained is a function of the cavity amplification and the mirror reflectivities. The distribution of photo-electrons emitted from a detector of area A and resolving time T when illuminated by an incident light beam is derived. By using a binomial rather tha a deterministic quantum efficiency an additional term is obtained in the autocorrelation function. The resulting spectral density of the photo-current fluctuations is shown to be the sum of a Poisson particle noise and wave interference term. Several examples of different spectral line shapes are discussed. Also considered is an intensity modulated light beam.
Upper bounds for the order of an additive basis obtained by removing a finite subset of a given basis
Creators: name: Farhi, Bakir
Publisher: name: arXiv
Year: 2009
Subjects: subject: Number Theory (math.NT)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 11B13

description: Let $A$ be an additive basis of order $h$ and $X$ be a finite nonempty subset of $A$ such that the set $A \setminus X$ is still a basis. In this article, we give several upper bounds for the order of $A \setminus X$ in function of the order $h$ of $A$ and some parameters related to $X$ and $A$. If the parameter in question is the cardinality of $X$, Nathanson and Nash already obtained some of such upper bounds, which can be seen as polynomials in $h$ with degree $(|X| + 1)$. Here, by taking instead of the cardinality of $X$ the parameter defined by $d := \frac{\diam(X)}{\gcd\{x - y | x, y \in X\}}$, we show that the order of $A \setminus X$ is bounded above by $(\frac{h (h + 3)}{2} + d \frac{h (h - 1) (h + 4)}{6})$. As a consequence, we deduce that if $X$ is an arithmetic progression of length $\geq 3$, then the upper bounds of Nathanson and Nash are considerably improved. Further, by considering more complex parameters related to both $X$ and $A$, we get upper bounds which are polynomials in $h$ with degree only 2.
description: 17 pages
Deterministic multi-phonon entanglement between two mechanical resonators on separate substrates
Creators: name: Chou, Ming-Han
name: Qiao, Hong
name: Yan, Haoxiong
name: Andersson, Gustav
name: Conner, Christopher R.
name: Grebel, Joel
name: Joshi, Yash J.
name: Miller, Jacob M.
name: Povey, Rhys G.
name: Wu, Xuntao
name: Cleland, Andrew N.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Mechanical systems have emerged as a compelling platform for applications in quantum information, leveraging recent advances in the control of phonons, the quanta of mechanical vibrations. Several experiments have demonstrated control and measurement of phonon states in mechanical resonators integrated with superconducting qubits, and while entanglement of two mechanical resonators has been demonstrated in some approaches, a full exploitation of the bosonic nature of phonons, such as multi-phonon entanglement, remains a challenge. Here, we describe a modular platform capable of rapid multi-phonon entanglement generation and subsequent tomographic analysis, using two surface acoustic wave resonators on separate substrates, each connected to a superconducting qubit. We generate a mechanical Bell state between the two mechanical resonators, achieving a fidelity of $\mathcal{F} = 0.872\pm 0.002$, and further demonstrate the creation of a multi-phonon entangled state (N=2 N00N state), shared between the two resonators, with fidelity $\mathcal{F} = 0.748\pm 0.008$. This approach promises the generation and manipulation of more complex phonon states, with potential future applications in bosonic quantum computing in mechanical systems. The compactness, modularity, and scalability of our platform further promises advances in both fundamental science and advanced quantum protocols, including quantum random access memory and quantum error correction.
description: 25 pages, 9 figures
Thermal entanglement and quantum coherence of a single electron in a double quantum dot with Rashba Interaction
Creators: name: Ferreira, Merynilda
name: Rojas, Onofre
name: Rojas, Moises
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In this work, we study the thermal quantum coherence and fidelity in a semiconductor double quantum dot. The device consists of a single electron in a double quantum dot with Rashba spin-orbit coupling in the presence of an external magnetic field. In our scenario, the thermal entanglement of the single electron is driven by the charge and spin qubits, the latter controlled by Rashba coupling. Analytical expressions are obtained for thermal concurrence and correlated coherence using the density matrix formalism. The main goal of this work is to provide a good understanding of the effects of temperature and several parameters in quantum coherence. In addition, our findings show that we can use the Rashba coupling to tune in the thermal entanglement, quantum coherence, as well as, the thermal fidelity behavior of the system. Moreover, we focus on the role played by thermal entanglement and correlated coherence responsible for quantum correlations. We observe that the correlated coherence is more robust than the thermal entanglement in all cases, so quantum algorithms based only on correlated coherence may be stronger than those based on entanglement.
description: Version modified for clearer explanations with typos corrected
Multi-Robot Scan-n-Print for Wire Arc Additive Manufacturing
Creators: name: Lu, Chen-Lung
name: He, Honglu
name: Ren, Jinhan
name: Dhar, Joni
name: Saunders, Glenn
name: Julius, Agung
name: Samuel, Johnson
name: Wen, John T.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: Robotic Wire Arc Additive Manufacturing (WAAM) is a metal additive manufacturing technology, offering flexible 3D printing while ensuring high quality near-net-shape final parts. However, WAAM also suffers from geometric imprecision, especially for low-melting-point metal such as aluminum alloys. In this paper, we present a multi-robot framework for WAAM process monitoring and control. We consider a three-robot setup: a 6-dof welding robot, a 2-dof trunnion platform, and a 6-dof sensing robot with a wrist-mounted laser line scanner measuring the printed part height profile. The welding parameters, including the wire feed rate, are held constant based on the materials used, so the control input is the robot path speed. The measured output is the part height profile. The planning phase decomposes the target shape into slices of uniform height. During runtime, the sensing robot scans each printed layer, and the robot path speed for the next layer is adjusted based on the deviation from the desired profile. The adjustment is based on an identified model correlating the path speed to change in height. The control architecture coordinates the synchronous motion and data acquisition between all robots and sensors. Using a three-robot WAAM testbed, we demonstrate significant improvements of the closed loop scan-n-print approach over the current open loop result on both a flat wall and a more complex turbine blade shape.
Collisional Quantum Brownian Motion
Creators: name: Kamleitner, I.
name: Cresser, J.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We derive a quantum master equation from first principles to describe friction in one dimensional, collisional Brownian motion. We are the first to avoid an ill-defined square of the Dirac delta function by using localized wave packets rather than plane waves. Solving the Schrödinger equation for two colliding particles, we discover that the previously found position diffusion is not a physical process, but an artifact of the approximation of a coarse grained time scale, which in turn is needed to find Markkovian dynamics.
description: 5 pages, 1 figure
Nontraditional Deterministic Remote State Preparation Using a Non-Maximally Entangled Channel without Additional Quantum Resources
Creators: name: Xin, Xuanxuan
name: Li, Yongxing
name: He, Shiwen
name: Li, Chong
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In this paper, we have reinvestigated probabilistic quantum communication protocols and developed a nontraditional remote state preparation protocol that allows for deterministically transferring information encoded in quantum states using a non-maximally entangled channel. With an auxiliary particle and a simple measurement method, the success probability of preparing a d-dimensional quantum state is increased to 1 without spending additional quantum resources in advance to improve quantum channels, such as entanglement purification. Furthermore, we have designed a feasible experimental scheme to demonstrate the deterministic paradigm of transporting a polarization-encoded photon from one location to another using a generalized entangled state. This approach provides a practical method to address decoherence and environmental noises in actual quantum communication.
description: 11 pages,2 figures
Pius XII and peace, 1939-1943 : excerpts from selected messages.
Creators: name: Pius XII, Pope, 1876-1958.
Publisher: name: University of Notre Dame
Year: 2023

description:
 First message to the world, March 3, 1939 -- To those in power and to their peoples, August 24, 1939 -- Christmas message, 1939 -- Appeal for peace with justice, November 24, 1940 -- Christmas message, 1940 -- Easter message, 1941 -- Address on fiftieth anniversary of The condition of labor, June 1, 1941 -- Divine providence in human events, June 29, 1941 -- Christmas message, 1941 -- Episcopal silver jubilee address, May 13, 1942 -- Dedication of world to Immaculate Heart of Mary, November 1, 1942 -- Christmas message, 1942.
Conditional symmetries and conditional constants of motion for dynamical systems
Creators: name: Gaeta, Giuseppe
Publisher: name: arXiv
Year: 2024
Subjects: subject: Dynamical Systems (math.DS)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: Conditional symmetries were introduced by Levi and Winternitz in their 1989 seminal paper to deal with nonlinear PDEs. Here we discuss their application in the framework of ODEs, and more specifically Dynamical Systems; it turns out they are closely related to two established -- albeit maybe less widely known -- concepts, i.e. orbital symmetries and configurational invariants. The paper is devoted to studying the interplay of these notions, and their application in the study of Dynamical Systems, with special attention to invariant manifolds of these.
description: 35 pages; V3: minor TeX issues solved. Published in OCNMP
Time domain methods for X-ray and gamma-ray astronomy
Creators: name: Feigelson, Eric D.
name: Kashyap, Vinay L.
name: Siemiginowska, Aneta
Publisher: name: arXiv
Year: 2022
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: A variety of statistical methods for understanding variability in the time domain for low count rate X-ray and gamma-ray sources are explored. Variability can be detected using nonparametric (Anderson-Darling and overdispersion tests) and parametric (sequential likelihood-based tests) tools. Once detected, variability can be characterized by nonparametric (autocorrelation function, structure function,wavelet analysis) and parametric (multiple change point model such as Bayesian Blocks, integer autoregressive models, C-statistic and Poisson regression) methods. New multidimensional variability detection approaches are outlined. Software packages designed for high energy data analysis are deficient but tools are available in the R statistical software environment. Most of the methods presented here are not commonly used in high energy astronomy.
description: 26 pages, 9 figures. To appear in Handbook for X-ray and Gamma-Ray Astrophysics, Volume 4: Analysis techniques, Section XVIII: Timing Analysis (Belloni & Bhattacharya, eds., Springer)
Foundation Models in Radiology: What, How, When, Why and Why Not
Creators: name: Paschali, Magdalini
name: Chen, Zhihong
name: Blankemeier, Louis
name: Varma, Maya
name: Youssef, Alaa
name: Bluethgen, Christian
name: Langlotz, Curtis
name: Gatidis, Sergios
name: Chaudhari, Akshay
Publisher: name: arXiv
Year: 2024
Subjects: subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Recent advances in artificial intelligence have witnessed the emergence of large-scale deep learning models capable of interpreting and generating both textual and imaging data. Such models, typically referred to as foundation models, are trained on extensive corpora of unlabeled data and demonstrate high performance across various tasks. Foundation models have recently received extensive attention from academic, industry, and regulatory bodies. Given the potentially transformative impact that foundation models can have on the field of radiology, this review aims to establish a standardized terminology concerning foundation models, with a specific focus on the requirements of training data, model training paradigms, model capabilities, and evaluation strategies. We further outline potential pathways to facilitate the training of radiology-specific foundation models, with a critical emphasis on elucidating both the benefits and challenges associated with such models. Overall, we envision that this review can unify technical advances and clinical needs in the training of foundation models for radiology in a safe and responsible manner, for ultimately benefiting patients, providers, and radiologists.
description: This pre-print has been accepted for publication in Radiology. (DOI for the peer-reviewed article: 10.1148/radiol.240597)
Introduction to ezEML and Publishing Data to the EDI Repository
Creators: name: Zollo-Venecek, Kyle
name: Gries, Corinna
name: Servilla, Mark
name: O'Brien, Margaret
name: Vanderbilt, Kristin
name: Ide, Jon
name: Smith, Colin
name: Grossman-Clarke, Susanne
name: Waide, Robert
name: Hanson, Paul
Publisher: name: Zenodo
Year: 2021
Subjects: data repository
open data
FAIR data
Environmental Data Initiative
metadata

description: This presentation was given to members of the Delta Science Program as part of a Reproducible Synthesis Research workshop hosted by NCEAS
description: Funding: NSF DBI-1931143 and NSF DBI-1931174
On the Brightness and Waiting-time Distributions of a Type III Radio Storm observed by STEREO/WAVES
Creators: name: Eastwood, J. P.
name: Wheatland, M. S.
name: Hudson, H. S.
name: Krucker, S.
name: Bale, S. D.
name: Maksimovic, M.
name: Goetz, K.
name: Bougeret, J. -L.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Type III solar radio storms, observed at frequencies below approximately 16 MHz by space borne radio experiments, correspond to the quasi-continuous, bursty emission of electron beams onto open field lines above active regions. The mechanisms by which a storm can persist in some cases for more than a solar rotation whilst exhibiting considerable radio activity are poorly understood. To address this issue, the statistical properties of a type III storm observed by the STEREO/WAVES radio experiment are presented, examining both the brightness distribution and (for the first time) the waiting-time distribution. Single power law behavior is observed in the number distribution as a function of brightness; the power law index is approximately 2.1 and is largely independent of frequency. The waiting-time distribution is found to be consistent with a piecewise-constant Poisson process. This indicates that during the storm individual type III bursts occur independently and suggests that the storm dynamics are consistent with avalanche type behavior in the underlying active region.
description: 14 pages, 4 figures, 1 table. Accepted for publication in Astrophysical Journal Letters