cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Polarization optimality of equally spaced points on the circle for discrete potentials
Creators: name: Hardin, D. P.
name: Kendall, A. P.
name: Saff, E. B.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: 52A40, 30C15 (Primary)

description: We prove a conjecture of Ambrus, Ball and Erdélyi that equally spaced points maximize the minimum of discrete potentials on the unit circle whenever the potential is of the form \sum_{k=1}^n f(d(z,z_k)), where $f:[0,π]\to [0,\infty]$ is non-increasing and strictly convex and $d(z,w)$ denotes the geodesic distance between $z$ and $w$ on the circle.
description: 8 pages, 1 figure, to appear Discrete and Computational Geometry
Ice polyamorphism in the minimal Mercedes-Benz model of water
Creators: name: Cartwright, Julyan H. E.
name: Piro, Oreste
name: Sánchez, Pedro A.
name: Sintes, Tomás
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: FOS: Physical sciences

description: We investigate ice polyamorphism in the context of the two-dimensional Mercedes-Benz model of water. We find a first-order phase transition between a crystalline phase and a high-density amorphous phase. Furthermore we find a reversible transformation between two amorphous structures of high and low density; however we find this to be a continuous and not an abrupt transition, as the low-density amorphous phase does not show structural stability. We discuss the origin of this behavior and its implications with regard to the minimal generic modeling of polyamorphism.
GraphCFC: A Directed Graph Based Cross-Modal Feature Complementation Approach for Multimodal Conversational Emotion Recognition
Creators: name: Li, Jiang
name: Wang, Xiaoping
name: Lv, Guoqing
name: Zeng, Zhigang
Publisher: name: arXiv
Year: 2022
Subjects: subject: Computation and Language (cs.CL)
subject: Machine Learning (cs.LG)
subject: Multimedia (cs.MM)
subject: FOS: Computer and information sciences

description: Emotion Recognition in Conversation (ERC) plays a significant part in Human-Computer Interaction (HCI) systems since it can provide empathetic services. Multimodal ERC can mitigate the drawbacks of uni-modal approaches. Recently, Graph Neural Networks (GNNs) have been widely used in a variety of fields due to their superior performance in relation modeling. In multimodal ERC, GNNs are capable of extracting both long-distance contextual information and inter-modal interactive information. Unfortunately, since existing methods such as MMGCN directly fuse multiple modalities, redundant information may be generated and diverse information may be lost. In this work, we present a directed Graph based Cross-modal Feature Complementation (GraphCFC) module that can efficiently model contextual and interactive information. GraphCFC alleviates the problem of heterogeneity gap in multimodal fusion by utilizing multiple subspace extractors and Pair-wise Cross-modal Complementary (PairCC) strategy. We extract various types of edges from the constructed graph for encoding, thus enabling GNNs to extract crucial contextual and interactive information more accurately when performing message passing. Furthermore, we design a GNN structure called GAT-MLP, which can provide a new unified network framework for multimodal learning. The experimental results on two benchmark datasets show that our GraphCFC outperforms the state-of-the-art (SOTA) approaches.
description: Accepted by IEEE Transactions on Multimedia (TMM)
Quantum-enhanced cluster detection in physical images
Creators: name: Pereira, Jason L.
name: Banchi, Leonardo
name: Pirandola, Stefano
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Identifying clusters in data is an important task in many fields. In this paper, we consider situations in which data live in a physical world, so we have to first collect the images using sensors before clustering them. Using sensors enhanced by quantum entanglement, we can image surfaces more accurately than using purely classical strategies. However, it is not immediately obvious if the advantage we gain is robust enough to survive data processing steps such as clustering. It has previously been found that using quantum-enhanced sensors for imaging and pattern recognition can give an advantage for supervised learning tasks, and here we demonstrate that this advantage also holds for an unsupervised learning task, namely clustering.
description: 14 pages, 9 figures. Similar to published version. Supplemental material available at https://github.com/softquanta/clustering
S. von Below, S. Breit, Walt - von der Gottesgabe zum Privateigentum. Gerichtliche Konflikte zwischen Landesherren und Untertanen um den Wald in der frühen Neuzeit, 1998
Creators: name: Boehler, J.-M.
Publisher: name: Francia
Year: 2019

description: Francia, Bd. 27 Nr. 2 (2000)
A simple learning agent interacting with an agent-based market model
Creators: name: Dicks, Matthew
name: Paskaramoorthy, Andrew
name: Gebbie, Tim
Publisher: name: arXiv
Year: 2022
Subjects: subject: Trading and Market Microstructure (q-fin.TR)
subject: Machine Learning (cs.LG)
subject: Multiagent Systems (cs.MA)
subject: FOS: Economics and business
subject: FOS: Computer and information sciences

description: We consider the learning dynamics of a single reinforcement learning optimal execution trading agent when it interacts with an event driven agent-based financial market model. Trading takes place asynchronously through a matching engine in event time. The optimal execution agent is considered at different levels of initial order-sizes and differently sized state spaces. The resulting impact on the agent-based model and market are considered using a calibration approach that explores changes in the empirical stylised facts and price impact curves. Convergence, volume trajectory and action trace plots are used to visualise the learning dynamics. Here the smaller state space agents had the number of states they visited converge much faster than the larger state space agents, and they were able to start learning to trade intuitively using the spread and volume states. We find that the moments of the model are robust to the impact of the learning agents except for the Hurst exponent, which was lowered by the introduction of strategic order-splitting. The introduction of the learning agent preserves the shape of the price impact curves but can reduce the trade-sign auto-correlations when their trading volumes increase.
description: 18 pages, 7 figures. Accepted: Physica A
Entanglement Renormalization of the class of Continuous Matrix Product States
Creators: name: Vardian, Niloofar
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Continuous tensor network gives a variational ansatz for the ground state of the quantum field theories (QFTs). The notable examples are the continuous matrix product state (cMPS) and the continuous multiscale entanglement renormalization ansatz (cMERA). While cMPS is just adapted to the non-relativistic QFTs, only the Gaussian cMERA is well-understood which we can not use to approximate the ground state of the interacting relativistic QFTs. But instead, cMERA also corresponds to a real-space renormalization group flow in the context of the wave functions. In this letter, we investigate the backward Gaussian cMERA renormalization group flow of the class of cMPS by putting the standard cMPS at the IR scale. At the UV scale, for the bosonic systems in the thermodynamic limit, we achieve the variational class of states that has been proposed recently as the relativistic cMPS (RCMPS) is adapted to the relativistic QFTs without requiring to introduce of any additional IR or UV cut-off. We also extend the RCMPS to fermionic systems and theories on a finite circle.
description: 6 pages, 1 figure
Holographic QFTs on AdS$_d$, wormholes and holographic interfaces
Creators: name: Ghodsi, A.
name: Ghosh, J. K.
name: Kiritsis, E.
name: Nitti, F.
name: Nourry, V.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider three related topics: (a) Holographic quantum field theories on AdS spaces. (b) Holographic interfaces of flat space QFTs. (c) Wormholes connecting generically different QFTs. We investigate in a concrete example how the related classical solutions explore the space of QFTs and we construct the general solutions that interpolate between the same or different CFTs with arbitrary couplings. The solution space contains many exotic RG flow solutions that realize unusual asymptotics, as boundaries of different regions in the space of solutions. We find phenomena like "walking" flows and the generation of extra boundaries via "flow fragmentation".
description: 97 pages, 52 figures
Maintaining Market Quality of Fresh Lychees During Storage and Transit
Creators: name: Hatton, T. T.
name: Reeder, Wm. F.
name: Kaufman, J.
name: Hatton, T. T.
name: Reeder, Wm. F.
name: Kaufman, J.
Publisher: name: Unknown
Year: 1966
Subjects: subject: Crop Production/Industries
subject: Marketing
subject: FOS: Economics and business
subject: Research and Development/Tech Change/Emerging Technologies

description: Excerpts from the report: The United States produces only a limited quantity of lychees, most of which are consumed fresh. Production in Florida continues to increase, especially in protected areas of southern Florida. Due to the perishable nature of fresh lychees, most Florida fruit marketed outside the State is shipped by air freight. The present study, which was undertaken at the request of the Florida Lychee Growers Association, was made to determine the value of polyethylene packaging at various storage temperatures and during air and truck shipment.
Enabling Homogeneous GNNs to Handle Heterogeneous Graphs via Relation Embedding
Creators: name: Wang, Junfu
name: Guo, Yuanfang
name: Yang, Liang
name: Wang, Yunhong
Publisher: name: arXiv
Year: 2022
Subjects: subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Graph Neural Networks (GNNs) have been generalized to process the heterogeneous graphs by various approaches. Unfortunately, these approaches usually model the heterogeneity via various complicated modules. This paper aims to propose a simple yet effective framework to assign adequate ability to the homogeneous GNNs to handle the heterogeneous graphs. Specifically, we propose Relation Embedding based Graph Neural Network (RE-GNN), which employs only one parameter per relation to embed the importance of distinct types of relations and node-type-specific self-loop connections. To optimize these relation embeddings and the model parameters simultaneously, a gradient scaling factor is proposed to constrain the embeddings to converge to suitable values. Besides, we interpret the proposed RE-GNN from two perspectives, and theoretically demonstrate that our RE-GCN possesses more expressive power than GTN (which is a typical heterogeneous GNN, and it can generate meta-paths adaptively). Extensive experiments demonstrate that our RE-GNN can effectively and efficiently handle the heterogeneous graphs and can be applied to various homogeneous GNNs.
Nondegeneracy and integral count of frozen planet orbits in helium
Creators: name: Cieliebak, Kai
name: Frauenfelder, Urs
name: Volkov, Evgeny
Publisher: name: arXiv
Year: 2022
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics
subject: 47J30

description: We study a family of action functionals whose critical points interpolate between frozen planet orbits for the helium atom with mean interaction between the electrons and the free fall. The rather surprising first result of this paper asserts that for the whole family, critical points are always nondegenerate. This implies that the frozen planet orbit with mean interaction is nondegenerate and gives a new proof of its uniqueness. As an application, we show that the integral count of frozen planet orbits with instantaneous interaction equals one. For this, we prove orientability of the determinant line bundle over the space of selfadjoint Fredholm operators with spectrum bounded from below, and use it to define an integer valued Euler characteristic for Fredholm sections whose linearization belongs to this class.
description: 57 pages
Rolling horizon policies for multi-stage stochastic assemble-to-order problems
Creators: name: Gioia, Daniele Giovanni
name: Fadda, Edoardo
name: Brandimarte, Paolo
Publisher: name: arXiv
Year: 2022
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics

description: Assemble-to-order approaches deal with randomness in demand for end items by producing components under uncertainty, but assembling them only after demand is observed. Such planning problems can be tackled by stochastic programming, but true multistage models are computationally challenging and only a few studies apply them to production planning. Solutions based on two-stage models are often short-sighted and unable to effectively deal with non-stationary demand. A further complication may be the scarcity of available data, especially in the case of correlated and seasonal demand. In this paper, we compare different scenario tree structures. In particular, we enrich a two-stage formulation by introducing a piecewise linear approximation of the value of the terminal inventory, to mitigate the two-stage myopic behavior. We compare the out-of-sample performance of the resulting models by rolling horizon simulations, within a data-driven setting, characterized by seasonality, bimodality, and correlations in the distribution of end item demand. Computational experiments suggest the potential benefit of adding a terminal value function and illustrate interesting patterns arising from demand correlations and the level of available capacity. The proposed approach can provide support to typical MRP/ERP systems, when a two-level approach is pursued, based on master production and final assembly scheduling.
description: This is an Author's Original Manuscript of an article published by Taylor and Francis in the International Journal of Production Research on 21.11.2023, available online: https://doi.org/10.1080/00207543.2023.2283570
The large-scale cross-correlation of Damped Lyman Alpha Systems with the Lyman Alpha Forest: First Measurements from BOSS
Creators: name: Font-Ribera, Andreu
name: Miralda-Escudé, Jordi
name: Arnau, Eduard
name: Carithers, Bill
name: Lee, Khee-Gan
name: Noterdaeme, Pasquier
name: Pâris, Isabelle
name: Petitjean, Patrick
name: Rich, James
name: Rollinde, Emmanuel
name: Ross, Nicholas P.
name: Schneider, Donald P.
name: White, Martin
name: York, Donald G.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present the first measurement of the large-scale cross-correlation of Lyman alpha forest absorption and Damped Lyman alpha systems (DLA), using the 9th Data Release of the Baryon Oscillation Spectroscopic Survey (BOSS). The cross-correlation is clearly detected on scales up to 40 Mpc/h and is well fitted by the linear theory prediction of the standard Cold Dark Matter model of structure formation with the expected redshift distortions, confirming its origin in the gravitational evolution of structure. The amplitude of the DLA-Lyman alpha cross-correlation depends on only one free parameter, the bias factor of the DLA systems, once the Lyman alpha forest bias factors are known from independent Lyman alpha forest correlation measurements. We measure the DLA bias factor to be b_D = (2.17 +/- 0.20) beta_F^{0.22}, where the Lyman alpha forest redshift distortion parameter beta_F is expected to be above unity. This bias factor implies a typical host halo mass for DLAs that is much larger than expected in present DLA models, and is reproduced if the DLA cross section scales with halo mass as M_h^alpha, with alpha= 1.1 +/- 0.1 for beta_F=1. Matching the observed DLA bias factor and rate of incidence requires that atomic gas remains extended in massive halos over larger areas than predicted in present simulations of galaxy formation, with typical DLA proper sizes larger than 20 kpc in host halos of masses ~ 10^12 solar masses. We infer that typical galaxies at z ~ 2 to 3 are surrounded by systems of atomic clouds that are much more extended than the luminous parts of galaxies and contain ~ 10% of the baryons in the host halo.
description: 43 pages
Impact of the second order self-forces on the dephasing of the gravitational waves from quasi-circular extreme mass-ratio inspirals
Creators: name: Isoyama, Soichiro
name: Fujita, Ryuichi
name: Sago, Norichika
name: Tagoshi, Hideyuki
name: Tanaka, Takahiro
Publisher: name: arXiv
Year: 2012
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The accurate calculation of long-term phase evolution of gravitational wave (GW) forms from extreme (intermediate) mass ratio inspirals (E(I)MRIs) is an inevitable step to extract information from this system. Achieving this goal, it is believed that we need to understand the gravitational self-forces. However, it is not quntatively demonstrated that the second order self-forces are necessary for this purpose. In this paper we revisit the problem to estimate the order of magnitude of the dephasing caused by the second order self-forces on a small body in a quasi-circular orbit around a Kerr black hole, based on the knowledge of the post-Newtonian (PN) approximation and invoking the energy balance argument. In particular, we focus on the averaged dissipative part of the self-force, since it gives the leading order contribution among the various components of them. To avoid the possibility that the energy flux of GWs becomes negative, we propose a new simple resummation called exponential resummation, which assures the positivity of the energy flux. In order to estimate the magnitude of the yet unknown second order self-forces, here we point out the scaling property in the absolute value of the PN coefficients of the energy flux. Using these new tools, we evaluate the expected magnitude of dephasing. Our analysis indicates that the dephasing due to the second order self-forces for quasi-circular E(I)MRIs may be well captured by the 3PN energy flux, once we obtain all the spin dependent terms, except for the case with an extremely large spin of the central Kerr black.
description: 16 pages, 7 figures. revtex4,v2:added references, and minor modification to clarify the arguments; version published in PRD
Fitted Finite Volume Method for a Generalized Black-Scholes Equation Transformed on Finite Interval
Creators: name: Valkov, Radoslav
Publisher: name: arXiv
Year: 2012
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics
subject: 35K65, 65M08, 91G20, 91G60

description: A generalized Black-Scholes equation is considered on the semi-axis. It is transformed on the interval (0,1) in order to make the computational domain finite. The new parabolic operator degenerates at the both ends of the interval and we are forced to use the Gärding inequality rather than the classical coercivity. A fitted finite volume element space approximation is constructed. It is proved that the time θ-weighted full discretization is uniquely solvable and positivity-preserving. Numerical experiments, performed to illustrate the usefulness of the method, are presented.
description: Numerical Algorithms
W. Faulstich, Medien zwischen Herrschaft und Revolte. Die Medienkultur der frühen Neuzeit (1400-1700), 1998
Creators: name: Nolde, Dorothea
Publisher: name: Francia
Year: 2019

description: W. Faulstich, Medien zwischen Herrschaft und Revolte. Die Medienkultur der frühen Neuzeit (1400-1700), 1998 (D. Nolde)
description: Francia, Bd. 30 Nr. 2 (2003)
Harmonic metrics of generically regular semisimple Higgs bundles on non-compact Riemann surfaces
Creators: name: Li, Qiongling
name: Mochizuki, Takuro
Publisher: name: arXiv
Year: 2022
Subjects: subject: Differential Geometry (math.DG)
subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 53C07, 58E15, 14D21, 81T13

description: We prove that a generically regular semisimple Higgs bundle equipped with a non-degenerate symmetric pairing on any Riemann surface always has a harmonic metric compatible with the pairing. We also study the classification of such compatible harmonic metrics in the case where the Riemann surface is the complement of a finite set $D$ in a compact Riemann surface. In particular, we prove the uniqueness of a compatible harmonic metric if the Higgs bundle is wild and regular semisimple at each point of $D$.
L. Avezou, Sully à travers l'histoire. Les avatars d'un mythe politique, Préface de B. Barbiche, 2001
Creators: name: Kleber, Hermann
Publisher: name: Francia
Year: 2019

description: L. Avezou, Sully à travers l'histoire. Les avatars d'un mythe politique, Préface de B. Barbiche, 2001 (H. Kleber)
description: Francia, Bd. 30 Nr. 2 (2003)
C. Henke, Coblentz: Symbol für die Gegenrevolution. Die französische Emigration nach Koblenz und Kurtrier 1789-1792 und die politische Diskussion des revolutionären Frankreichs 1791-1794, 2000
Creators: name: Rance, Karine
Publisher: name: Francia
Year: 2019

description: C. Henke, Coblentz: Symbol für die Gegenrevolution. Die französische Emigration nach Koblenz und Kurtrier 1789-1792 und die politische Diskussion des revolutionären Frankreichs 1791-1794, 2000 (K. Rance)
description: Francia, Bd. 30 Nr. 2 (2003)
Microfluidic platform using focused ultrasound passing through hydrophobic meshes with jump availability
Creators: name: Koroyasu, Yusuke
name: Nguyen, Thanh-Vinh
name: Sasaguri, Shun
name: Marzo, Asier
name: Ezcurdia, Iñigo
name: Nagata, Yuuya
name: Yamamoto, Tatsuya
name: Nomura, Nobuhiko
name: Hoshi, Takayuki
name: Ochiai, Yoichi
name: Fushimi, Tatsuki
Publisher: name: Zenodo
Year: 2023
Subjects: Microfluidics
Ultrasound
Hydrophobic
Automation

description: The initial release of code sets following the acceptance of the paper "Microfluidic platform using focused ultrasound passing through hydrophobic meshes with jump availability" on PNAS Nexus. Dataset for: "Microfluidic platform using focused ultrasound passing through hydrophobic meshes with jump availability". Authors: Yusuke Koroyasu, Thanh-Vinh Nguyen, Shun Sasaguri, Asier Marzo, Iñ igo Ezcurdia, Yuuya Nagata, Tatsuya Yamamoto, Nobuhiko Nomura, Takayuki Hoshi, Yoichi Ochiai, Tatsuki Fushimi*, Journal: PNAS Nexus. Accepted: 12th-June-2023 Correspondence Email: tfushimi@slis.tsukuba.ac.jp LICENSE INFORMATION: This code sets are released for Academic/Research purpose only.
description: {"references": ["Jonathan C. Lansey (2023). Beautiful and distinguishable line colors + colormap (https://www.mathworks.com/matlabcentral/fileexchange/42673-beautiful-and-distinguishable-line-colors-colormap), MATLAB Central File Exchange. Retrieved June 18, 2023.", "Junxing Zheng (2023). Particle Roundness and Sphericity Computation (https://www.mathworks.com/matlabcentral/fileexchange/60651-particle-roundness-and-sphericity-computation), MATLAB Central File Exchange. Retrieved June 18, 2023.", "Red Blue Colormap (https://www.mathworks.com/matlabcentral/fileexchange/25536-red-blue-colormap), MATLAB Central File Exchange. Retrived June 18, 2023.", "Arrow3 (https://www.mathworks.com/matlabcentral/fileexchange/14056-arrow3), MATLAB Central File Exchange. Retrived June 20, 2023.", "Zhaoxu Liu / slandarer (2023). 200 colormap (https://www.mathworks.com/matlabcentral/fileexchange/120088-200-colormap), MATLAB Central File Exchange. Retrived June 20, 2023."]}
Fermi surfaces in N=4 Super-Yang-Mills theory
Creators: name: DeWolfe, Oliver
name: Gubser, Steven S.
name: Rosen, Christopher
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We investigate and classify Fermi surface behavior for a set of fermionic modes in a family of backgrounds holographically dual to N=4 Super-Yang-Mills theory at zero temperature with two distinct chemical potentials. We numerically solve fluctuation equations for every spin-1/2 field in five-dimensional maximally supersymmetric gauged supergravity not mixing with gravitini. Different modes manifest two, one or zero Fermi surface singularities, all associated to non-Fermi liquids, and we calculate dispersion relations and widths of excitations. We study two limits where the zero-temperature entropy vanishes. In one limit, a Fermi surface approaches a marginal Fermi liquid, which we demonstrate analytically, and conductivity calculations show a hard gap with the current dual to the active gauge field superconducting, while the other is insulating. In the other limit, conductivities reveal a soft gap with the roles of the gauge fields reversed.
description: 57 pages, 14 figures, LaTeX. v2: discussion of 2-charge black hole clarified, references added
A multiscale quasilinear system for colloids deposition in porous media: Weak solvability and numerical simulation of a near-clogging scenario
Creators: name: Eden, Michael
name: Nikolopoulos, Christos
name: Muntean, Adrian
Publisher: name: arXiv
Year: 2021
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 35K61, 65N06, 35B27, 76S05, 80M40

description: We study the weak solvability of a quasilinear reaction-diffusion system nonlinearly coupled with an linear elliptic system posed in a domain with distributed microscopic balls in $2D$. The size of these balls are governed by an ODE with direct feedback on the overall problem. The system describes the diffusion, aggregation, fragmentation, and deposition of populations of colloidal particles of various sizes inside a porous media made of prescribed arrangement of balls. The mathematical analysis of the problem relies on a suitable application of Schauder's fixed point theorem which also provides a convergent algorithm for an iteration method to compute finite difference approximations of smooth solutions to our multiscale model. Numerical simulations illustrate the behavior of the local concentration of the colloidal populations close to clogging situations.
description: 27 pages, 12 figures
Separation of spacetime and matter in polar oscillations of compact stars
Creators: name: Zhang, Y. J.
name: Zhu, Q. Q.
name: Wu, J.
name: Leung, P. T.
Publisher: name: arXiv
Year: 2012
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In polar oscillations of compact stars dynamical changes in spacetime and matter are in general coupled together. Based on the theory of stellar pulsation proposed by Allen et al. [Phys. Rev. D 58, 124012 (1998)], we establish a feasible approximation scheme to separate spacetime from matter in such oscillations. Two independent second-order ordinary differential equations are obtained, which lead to accurate determination of p-mode and w-mode quasi-normal modes of compact stars, respectively.
description: 25 pages, 3 figures and 4 tables
Visualizing the ultra-structure of microorganisms using table-top extreme ultraviolet imaging
Creators: name: Liu, Chang
name: Eschen, Wilhelm
name: Loetgering, Lars
name: Molina, Daniel S.
name: Klas, Robert
name: Iliou, Alexander
name: Steinert, Michael
name: Herkersdorf, Sebastian
name: Kirsche, Alexander
name: Pertsch, Thomas
name: Hillmann, Falk
name: Limpert, Jens
name: Rothhardt, Jan
Publisher: name: arXiv
Year: 2022
Subjects: subject: Biological Physics (physics.bio-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Table-top extreme ultraviolet (EUV) microscopy offers unique opportunities for label-free investigation of biological samples. Here, we demonstrate ptychographic EUV imaging of two dried, unstained model specimens: germlings of a fungus (Aspergillus nidulans), and bacteria (Escherichia coli) cells at 13.5 nm wavelength. We find that the EUV spectral region, which to date has not received much attention for biological imaging, offers sufficient penetration depths for the identification of intracellular features. By implementing a position-correlated ptychography approach, we demonstrate a millimeter-squared field of view enabled by infrared illumination combined with sub-60 nm spatial resolution achieved with EUV illumination on selected regions of interest. The strong element contrast at 13.5 nm wavelength enables the identification of the nanoscale material composition inside the specimens. Our work will advance and facilitate EUV imaging applications and enable further possibilities in life science.
Static properties of 2D spin-ice as a sixteen-vertex model
Creators: name: Foini, Laura
name: Levis, Demian
name: Tarzia, Marco
name: Cugliandolo, Leticia F.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We present a thorough study of the static properties of 2D models of spin-ice type on the square lattice or, in other words, the sixteen-vertex model. We use extensive Monte Carlo simulations to determine the phase diagram and critical properties of the finite dimensional system. We put forward a suitable mean-field approximation, by defining the model on carefully chosen trees. We employ the cavity (Bethe-Peierls) method to derive self-consistent equations, the fixed points of which yield the equilibrium properties of the model on the tree-like graph. We compare mean-field and finite dimensional results. We discuss our findings in the context of experiments in artificial two dimensional spin ice.
description: 65 pages
Recursive Procedures for Krall-Sheffer Operators
Creators: name: Fordy, Allan P.
name: Scott, Michael J.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mathematical Physics (math-ph)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: We consider the Krall-Sheffer class of admissible, partial differential operators in the plane. We concentrate on algebraic structures, such as the role of commuting operators and symmetries. For the polynomial eigenfunctions, we give explicit forms of the the $3-$level recurrence relations and differential raising operators, which are shown to satisfy unusual commutation relations. We present new generating functions for two of the cases.
description: 26 pages, 7 figures, Several errors corrected. This is the final version as returned for publication in the journal
Fast shape reconstruction of perfectly conducting cracks by using a multi-frequency topological derivative strategy
Creators: name: Park, Won-Kwang
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: This paper concerns a fast, one-step iterative technique of imaging extended perfectly conducting cracks with Dirichlet boundary condition. In order to reconstruct the shape of cracks from scattered field data measured at the boundary, we introduce a topological derivative-based electromagnetic imaging function operated at several nonzero frequencies. The properties of the imaging function are carefully analyzed for the configurations of both symmetric and non-symmetric incident field directions. This analysis explains why the application of incident fields with symmetric direction operated at multiple frequencies guarantees a successful reconstruction. Various numerical simulations with noise-corrupted data are conducted to assess the performance, effectiveness, robustness, and limitations of the proposed technique.
description: 17 pages, 27 figures
Calculation of $β$-decay half-lives with Skyrme Hartree-Fock-Bogoliubov+$pn$-QRPA and isoscalar pairing strengths optimized by a Bayesian method
Creators: name: Minato, Futoshi
name: Niu, Z. M.
name: Liang, Haozhao
Publisher: name: arXiv
Year: 2022
Subjects: subject: Nuclear Theory (nucl-th)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: For radioactive nuclear data, $β$ decay is one of the most important information and is applied to various fields. However, some of the $β$-decay data are not available due to experimental difficulties. From this respect, theoretically calculated results have been embedded in the $β$-decay data to compensate the missing information. To calculate the $β$-decay half-lives, a proton-neutron quasi-particle random phase approximation on top of a Skryme energy density functional is applied with an assumption of spherical symmetry. The isoscalar pairing strength is estimated by a Bayesian neutral network (BNN). We verify the predicted isoscalar pairing strengths by preparing the training data and test data. It was confirmed that the finite-range isovector pairing ensures the $β$-decay half-lives insensitive to the model space, while the zero-range one was largely dependent on it. The half-lives calculated with the BNN isoscalar pairing strengths reproduced most of experimental data, although those of highly deformed nuclei were underestimated. We also studied that the predictive performance on new experimental data that were not used for the BNN training and found that they were reproduced well. Our study demonstrates that the isoscalar pairing strengths determined by the BNN can reproduce experimental data in the same accuracy as other theoretical works.
description: 13 page, 15 figures
A Study of Adoption and Effects of DevOps Practices
Creators: name: Offerman, Tyron
name: Blinde, Robert
name: Stettina, Christoph Johann
name: Visser, Joost
Publisher: name: arXiv
Year: 2022
Subjects: subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: Many organizations adopt DevOps practices and tools in order to break down silos within the organization, improve software quality and delivery, and increase customer satisfaction. However, the impact of the individual practices on the performance of the organization is not well known. In this paper, we collect evidence on the effects of DevOps practices and tools on organizational performance. In an extensive literature search we identified 14 DevOps practices, consisting of 47 subpractices. Based on these practices, we conducted a global survey to study their effects in practice, and measure DevOps maturity. Across 123 respondents, working in 11 different industries, we found that 13 of the 14 DevOps practices are adopted, determined by 50\% of the participants indicating that practices are `always', `most of the time', and 'about half of the time' applied. There is a positive correlation between the adoption of all practices and independently measured maturity. In particular, practices concerning sandboxes for minimum deployment, test-driven development, and trunk based development show the lowest correlations in our data. Effects of software delivery and organizational performance are mainly perceived positive. Yet, DevOps is also considered by some to have a negative impact such as respondents mentioning the predictability of product delivery has decreased and work is less fun. Concluding, our detailed overview of DevOps practices allows more targeted application of DevOps practices to obtain its positive effects while minimizing any negative effects.
description: to be published in conference proceedings of 28th IEEE ICE/ITMC & 31st IAMOT Conference IEEE
Compatibility of theta13 and the Type I Seesaw Model with A4 Symmetry
Creators: name: Chen, Mu-Chun
name: Huang, Jinrui
name: O'Bryan, Jon-Michael
name: Wijangco, Alexander M.
name: Yu, Felix
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We derive formulae for neutrino masses and mixing angles in a type I seesaw framework with an underlying A4 flavor symmetry. In particular, the Majorana neutrino mass matrix includes contributions from an A4 triplet, 1, 1', and 1" flavon fields. Using these formulae, we constrain the general A4 parameter space using the updated global fits on neutrino mixing angles and mass squared differences, including results from the Daya Bay and RENO experiments, and we find predictive relations among the mixing parameters for certain choices of the triplet vacuum expectation value. In the normal hierarchy case, sizable deviation from maximal atmospheric mixing is predicted, and such deviation is strongly correlated with the value of theta13 in the range of ~ (8-10) degrees. On the other hand, such deviation is negligible and insensitive to theta13 in the inverted mass hierarchy case. We also show expectations for the Dirac CP phase resulting from the parameter scan. Future refined measurements of neutrino mixing angles will test these predicted correlations and potentially show evidence for particular triplet vev patterns.
description: 22 Pages, 3 Figures; v2: version to appear in JHEP
Looking at the posterior: accuracy and uncertainty of neural-network predictions
Creators: name: Linander, H.
name: Balabanov, O.
name: Yang, H.
name: Mehlig, B.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Machine Learning (cs.LG)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: Bayesian inference can quantify uncertainty in the predictions of neural networks using posterior distributions for model parameters and network output. By looking at these posterior distributions, one can separate the origin of uncertainty into aleatoric and epistemic contributions. One goal of uncertainty quantification is to inform on prediction accuracy. Here we show that prediction accuracy depends on both epistemic and aleatoric uncertainty in an intricate fashion that cannot be understood in terms of marginalized uncertainty distributions alone. How the accuracy relates to epistemic and aleatoric uncertainties depends not only on the model architecture, but also on the properties of the dataset. We discuss the significance of these results for active learning and introduce a novel acquisition function that outperforms common uncertainty-based methods. To arrive at our results, we approximated the posteriors using deep ensembles, for fully-connected, convolutional and attention-based neural networks.
description: 26 pages, 10 figures, 5 tables
W. I. Farmer, Die Bewahrer des Erbes. Das Schicksal deutscher Kulturgüter am Ende des Zweiten Weltkrieges, überarbeitet und mit einem Vorwort versehen von K. Goldmann, Einleitung von M. Farmer Planton, aus dem amerikanischen Englisch übersetzt von H. Kunz
Creators: name: Löhr, Hans C.
Publisher: name: Francia
Year: 2019

description: Francia, Bd. 31 Nr. 3 (2004)
Molecular dynamics simulations of chemically modified ribonucleotides
Creators: name: Piomponi, Valerio
name: Bernetti, Mattia
name: Bussi, Giovanni
Publisher: name: arXiv
Year: 2022
Subjects: subject: Biomolecules (q-bio.BM)
subject: Biological Physics (physics.bio-ph)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: Post-transcriptional modifications are crucial for RNA function, with roles ranging from the stabilization of functional RNA structures to modulation of RNA--protein interactions. Additionally, artificially modified RNAs have been suggested as optimal oligonucleotides for therapeutic purposes. The impact of chemical modifications on secondary structure has been rationalized for some of the most common modifications. However, the characterization of how the modifications affect the three-dimensional RNA structure and dynamics and its capability to bind proteins is still highly challenging. Molecular dynamics simulations, coupled with enhanced sampling methods and integration of experimental data, provide a direct access to RNA structural dynamics. In the context of RNA chemical modifications, alchemical simulations where a wild type nucleotide is converted to a modified one are particularly common. In this Chapter, we review recent molecular dynamics studies of modified ribonucleotides. We discuss the technical aspects of the reviewed works, including the employed force fields, enhanced sampling methods, and alchemical methods, in a way that is accessible to experimentalists. Finally, we provide our perspective on this quickly growing field of research. The goal of this Chapter is to provide a guide for experimentalists to understand molecular dynamics works and, at the same time, give to molecular dynamics experts a solid review of published articles that will be a useful starting point for new research.
description: Submitted as a chapter for the book "RNA Structure and Function", series "RNA Technologies", published by Springer
Alte und neue Funde aus dem frühchristlichen Trier
Creators: name: Cüppers, Heinz
Publisher: name: Funde und Ausgrabungen im Bezirk Trier
Year: 2019

description: [nicht vorhanden]
description: Funde und Ausgrabungen im Bezirk Trier, Bd. 13 (1981): Funde und Ausgrabungen im Bezirk Trier : Aus der Arbeit des Rheinischen Landesmuseums Trier
On the power of nonstandard quantum oracles
Creators: name: Bassirian, Roozbeh
name: Fefferman, Bill
name: Marwaha, Kunal
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: Computational Complexity (cs.CC)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: We study how the choices made when designing an oracle affect the complexity of quantum property testing problems defined relative to this oracle. We encode a regular graph of even degree as an invertible function $f$, and present $f$ in different oracle models. We first give a one-query QMA protocol to test if a graph encoded in $f$ has a small disconnected subset. We then use representation theory to show that no classical witness can help a quantum verifier efficiently decide this problem relative to an in-place oracle. Perhaps surprisingly, a simple modification to the standard oracle prevents a quantum verifier from efficiently deciding this problem, even with access to an unbounded witness.
description: 22+13 pages
Ein Buchgefäß aus Siegburger Steinzeug
Creators: name: Seewaldt, Peter
Publisher: name: Funde und Ausgrabungen im Bezirk Trier
Year: 2019

description: [nicht vorhanden]
description: Funde und Ausgrabungen im Bezirk Trier, Bd. 19 (1987): Funde und Ausgrabungen im Bezirk Trier : Aus der Arbeit des Rheinischen Landesmuseums Trier
A Kohn-Sham Scheme Based Neural Network for Nuclear Systems
Creators: name: Yang, Zu-Xing
name: Fan, Xiao-Hua
name: Li, Zhi-Pan
name: Liang, Haozhao
Publisher: name: arXiv
Year: 2022
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: A Kohn-Sham scheme based multi-task neural network is elaborated for the supervised learning of nuclear shell evolution. The training set is composed of the single-particle wave functions and occupation probabilities of 320 nuclei, calculated by the Skyrme density functional theory. It is found that the deduced density distributions, momentum distributions, and charge radii are in good agreements with the benchmarking results for the untrained nuclei. In particular, accomplishing shell evolution leads to a remarkable improvement in the extrapolation of nuclear density. After a further charge-radius-based calibration, the network evolves a stronger predictive capability. This opens the possibility to infer correlations among observables by combining experimental data for nuclear complex systems.
Electroweak Radiative Corrections to Higgs Production via Vector Boson Fusion using SCET: Numerical Results
Creators: name: Siringo, Fabio
name: Buccheri, Giuseppe
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Electroweak radiative corrections are computed for Higgs production through vector boson fusion, qq->qqH, which is one of the most promising channels for detecting and studying the Higgs boson at the LHC. Using soft-collinear effective theory, we obtain numerical results for the resummed logarithmic contributions to the hadronic cross section at next-to-leading logarithmic order. We compare our results to HAWK and find good agreement below 2 TeV where the logarithms do not dominate. The SCET method is at its best in the high LHC energy domain where the corrections are found to be slightly larger than predicted by HAWK and by other one-loop fixed order approximations. This is one of the first tests of this formalism at the level of a hadronic cross section, and demonstrates the viability of obtaining electroweak corrections for generic processes without the need for difficult electroweak loop calculations.
description: Some minor corrections, 4 refs. added. arXiv admin note: text overlap with arXiv:1011.1505
Spatially Homogeneous Universes with Late-Time Anisotropy
Creators: name: Constantin, Andrei
name: Harvey, Thomas R.
name: von Hausegger, Sebastian
name: Lukas, Andre
Publisher: name: arXiv
Year: 2022
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The cosmological principle asserts that on sufficiently large scales the Universe is homogeneous and isotropic on spatial slices. To deviate from this principle requires a departure from the FLRW ansatz. In this paper we analyze the cosmological evolution of two spatially homogeneous but anisotropic universes, namely the spatially closed Kantowski-Sachs Universe and the open axisymmetric Bianchi type III Universe. These models are characterized by two scale factors and we study their evolution in universes with radiation, matter and a cosmological constant. In all cases, the two scale factors evolve differently and this anisotropy leads to a lensing effect in the propagation of light. We derive explicit formulae for computing redshifts, angular diameter distances and luminosity distances and discuss the predictions of these models in relation to observations for type Ia supernovae and the CMB. We comment on the possibility of explaining the observed luminosity distance plot for type Ia supernovae within the context of cosmologies featuring late-time anisotropy and a vanishing cosmological constant.