cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Eulerian and modified Lagrangian approaches to multi-dimensional condensation and collection
Creators: name: Li, Xiang-Yu
name: Brandenburg, A.
name: Haugen, N. E. L.
name: Svensson, G.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Geophysics (physics.geo-ph)
subject: FOS: Physical sciences

description: Turbulence is argued to play a crucial role in cloud droplet growth. The combined problem of turbulence and cloud droplet growth is numerically challenging. Here, an Eulerian scheme based on the Smoluchowski equation is compared with two Lagrangian superparticle (or su- perdroplet) schemes in the presence of condensation and collection. The growth processes are studied either separately or in combination using either two-dimensional turbulence, a steady flow, or just gravitational acceleration without gas flow. Good agreement between the differ- ent schemes for the time evolution of the size spectra is observed in the presence of gravity or turbulence. Higher moments of the size spectra are found to be a useful tool to characterize the growth of the largest drops through collection. Remarkably, the tails of the size spectra are reasonably well described by a gamma distribution in cases with gravity or turbulence. The Lagrangian schemes are generally found to be superior over the Eulerian one in terms of computational performance. However, it is shown that the use of interpolation schemes such as the cloud-in-cell algorithm is detrimental in connection with superparticle or superdroplet approaches. Furthermore, the use of symmetric over asymmetric collection schemes is shown to reduce the amount of scatter in the results.
description: 36 pages, 17 figures
MPEC 2023-O47 : 2023 OY
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2023
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2023 OY

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Stochastic electrodynamics and the interpretation of quantum theory
Creators: name: Santos, Emilio
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: I propose that quantum mechanics is a stochastic theory and quantum phenomena derive from the existence of real vacuum stochastic fields filling space. I revisit stochastic electrodynamics (SED), a theory that studies classical systems of electrically charged particles immersed in an electromagnetic (zeropoint) radiation field with spectral density proportional to the cube of the frequency, Planck's constant appearing as the parameter fixing the scale. Asides from briefly reviewing known results, I make a detailed comparison between SED and quantum mechanics. Both theories make the same predictions when the stochastic equations of motion are of first order in Planck constant, but not in general. I propose that SED provides a clue for a realistic interpretation of quantum theory.
description: Article fully rewritten. Several errors corrected
MARVEL - D6.1: Demonstrators execution - initial version
Creators: name: Festi, Thomas
Publisher: name: Zenodo
Year: 2022
Subjects: E2F2C
smart cities
demonstrators
experimental protocol
real-life use cases

description: This deliverable provides a detailed description of the experiments’ implementation following the line of D1.2 and taking into consideration the progress of the work done from month 10 (October 2021) to month 18 (June 2022) concerning the experimental protocol alignment of Task 6.1 and the configuration of the framework and execution of real-life societal use cases of Task 6.2. Each use case is described in terms of integration and deployment, configuration of the framework and execution of real-life societal experiments, as well as demonstration by reporting the experimental indicators and associated metrics for all experiments (Task 6.3).
Limited-Magnitude Error-Correcting Gray Codes for Rank Modulation
Creators: name: Yehezkeally, Yonatan
name: Schwartz, Moshe
Publisher: name: arXiv
Year: 2016
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: We construct Gray codes over permutations for the rank-modulation scheme, which are also capable of correcting errors under the infinity-metric. These errors model limited-magnitude or spike errors, for which only single-error-detecting Gray codes are currently known. Surprisingly, the error-correcting codes we construct achieve a better asymptotic rate than that of presently known constructions not having the Gray property, and exceed the Gilbert-Varshamov bound. Additionally, we present efficient ranking and unranking procedures, as well as a decoding procedure that runs in linear time. Finally, we also apply our methods to solve an outstanding issue with error-detecting rank-modulation Gray codes (snake-in-the-box codes) under a different metric, the Kendall $τ$-metric, in the group of permutations over an even number of elements $S_{2n}$, where we provide asymptotically optimal codes.
description: Revised version for journal submission. Additional results include more tight auxiliary constructions, a decoding shcema, ranking/unranking procedures, and application to snake-in-the-box codes under the Kendall tau-metric
Residual Diffeomorphisms and Symplectic Softs Hairs: The Need to Refine Strict Statement of Equivalence Principle
Creators: name: Sheikh-Jabbari, M. M.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: General covariance is the cornerstone of Einstein's General Relativity (GR) and implies that any two metrics related by diffeomorphisms are physically equivalent. There are, however, many examples pointing to the fact that this strict statement of general covariance needs refinement. There are a very special (measure-zero) subset of diffeomorphisms, the residual diffeomrphisms, to which one can associate well-defined conserved charges. This would hence render these diffeomorphic geometries physically distinct. We discuss that these symmetries may be appropriately called "symplectic symmetries". Existence of residual diffeomorphisms and sympelctic symmetries can be a quite general feature and not limited to the examples discussed so far in the literature. We propose that, in the context of black holes, these diffeomorphic, but distinct, geometries may be viewed as "symplectic soft hair" on black holes. We comment on how this may remedy black hole microstate problem, which in this context are dubbed as "horizon fluffs".
description: v2: 8 pages, Essay received honorable mention in the Gravity Research Foundation 2016 Awards for Essays on Gravitation; the version to appear in IJMPD special issue
Isgur-Wise function and a new approach to Potential Model
Creators: name: Das, Tapashi
name: Choudhury, D. K.
name: Pathak, K. K.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Considering the Cornell potential $V(r)=-\frac{4α_s}{3r}+br+c$, we have revisited the Dalgarno's method of perturbation by incorporating two scales $r^{short}$ and $r^{long}$ as integration limit so that the perturbative procedure can be improved in a potential model. With the improved version of the wave function the ground state masses of the heavy-light mesons $ D, D_s, B, B_s$ and $B_c $ are computed. The slopes and curvatures of the form factors of semi-leptonic decays of heavy-light mesons in both HQET limit and finite mass limit are calculated and compared with the available data.
description: 18 pages, 2 figures, To appear in International Journal of Modern Physics A
A hidden variables model for non-relativistic quantum mechanics in terms of probabilities of particle paths
Creators: name: Santos, Emilio
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: It is proved that in non-relativistic quantum mechanics (without spin) the transition probability may be described in terms of particle paths, every path having a (positive) probability. This leads to a stochastic hidden variables theory providing an intuitive picture of particle motion. The change of velocity at every time has a probability that depends on the potential over a large region, at a difference with the local action of classical dynamics. Thus the hidden variables theory is non-local like Bohm's, but not deterministic.
description: Several errors corrected
Nondiffractive feature of $γN\to ρ^\pm N$ with $ρ$-meson electromagnetic multipole moments
Creators: name: Yu, Byung-Geel
name: Kong, Kook-Jin
Publisher: name: arXiv
Year: 2016
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We investigate photoproduction of charged $ρ$ off the nucleon using $ρ(770)+π(140)$ Regge pole exchanges by considering the $ρ$-meson electromagnetic multipole moments. The significance of the Ward identity at the $γρρ$ vertex is emphasized for current conservation in the process. Given $π$ exchange with the well-known coupling constants for $γπρ$ and $πNN$, we analyze the role of the $ρ$ exchange in the $γp\to ρ^+n$ and $γn\toρ^-p$ processes without model-dependences except for the magnetic moment $μ_{ρ^\pm}=\pm2.01$ and electric quadrupole moment ${\cal Q}_{ρ^\pm}=\pm0.027$ fm$^2$ taken from theoretical estimates. The nondiffractive feature of both cross sections is reproduced with a rapid decrease beyond the resonance region by the dominance of $π$ exchange over the $ρ$\,. % Cross sections for differential and density matrix elements are presented to compare with existing data. The parity and photon polarization asymmetries are predicted to demonstrate the apparent roles of the $ρ$-meson electromagnetic multipole moments.
description: 5 pages, 8 figures
Causal analysis in dentistry: a scoping review of observational studies investigating the effect of Molar Incisor Hypomineralisation on the Oral Health Related Quality of Life in children
Creators: name: Shields, Stephanie
Publisher: name: Open Science Framework
Year: 2023
Subjects: subject: Dentistry
subject: FOS: Clinical medicine
subject: Pediatric Dentistry and Pedodontics
subject: Medicine and Health Sciences
subject: molar incisor hypomineralisation
subject: paediatric dentistry
subject: OHRQoL
subject: MIH
subject: Causal analysis in observational research
subject: oral health related quality of life

description: Protocol for a scoping review on how observational studies investigating the effect of Molar Hypomineralisation (MIH) on the Oral Health Related Quality of Life (OHRQoL) in children undertake causal analysis
Quantum interference in an interfacial superconductor
Creators: name: Goswami, Srijit
name: Mulazimoglu, Emre
name: Monteiro, Ana M. R. V. L.
name: Wölbing, Roman
name: Koelle, Dieter
name: Kleiner, Reinhold
name: Blanter, Ya. M.
name: Vandersypen, Lieven M. K.
name: Caviglia, Andrea D.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The two-dimensional superconductor formed at the interface between the complex oxides, lanthanum aluminate (LAO) and strontium titanate (STO) has several intriguing properties that set it apart from conventional superconductors. Most notably, an electric field can be used to tune its critical temperature (T$_c$), revealing a dome-shaped phase diagram reminiscent of high T$_c$ superconductors. So far, experiments with oxide interfaces have measured quantities which probe only the magnitude of the superconducting order parameter and are not sensitive to its phase. Here, we perform phase-sensitive measurements by realizing the first superconducting quantum interference devices (SQUIDs) at the LAO/STO interface. Furthermore, we develop a new paradigm for the creation of superconducting circuit elements, where local gates enable in-situ creation and control of Josephson junctions. These gate-defined SQUIDs are unique in that the entire device is made from a single superconductor with purely electrostatic interfaces between the superconducting reservoir and the weak link. We complement our experiments with numerical simulations and show that the low superfluid density of this interfacial superconductor results in a large, gate-controllable kinetic inductance of the SQUID. Our observation of robust quantum interference opens up a new pathway to understand the nature of superconductivity at oxide interfaces.
description: Version prior to peer review. Final version published in Nature Nanotechnology
title: Blunt Chest Trauma in Polytraumatized Patients: Predictive Factors for Urgent Thoracotomy
Creators: name: Stolberg-Stolberg, Josef
name: Katthagen, J. Christoph
name: Hillemeyer, Thomas
name: Wiebe, Karsten
name: Koeppe, Jeanette
name: Raschke, Michael J.
Publisher: name: University of Muenster, Institutional Repository MIAMI
Year: 2023
Subjects: subject: 610 Medicine and health

description: Purpose: Current guidelines on urgent thoracotomy of polytraumatized patients are based on data from perforating chest injuries. We aimed to identify predictive factors for urgent thoracotomy after chest-tube placement for blunt chest trauma in a civilian setting. Methods: Polytraumatized patients (Injury Severity Score ≥16) with blunt chest trauma, submitted to a level I trauma centre during a period of 12 years that received at least one chest tube were included. Trauma mechanism, chest-tube output, haemoglobin values, need for cellular blood products, coagulopathies, rib fracture pattern, thoracotomy, and mortality were retrospectively analysed. Results: 235 polytraumatized patients were included. Patients that received urgent thoracotomy (UT, n = 10) showed a higher mean chest-tube output within 24 h with a median (Mdn) of 3865 (IQR 2423–5156) mL compared to the group with no additional thoracic surgery (NT, n = 225) with Mdn 185 (IQR 50–463) mL (p < 0.001). The cut-off 24-h chest-tube output value for recommended thoracotomy was 1270 mL (ROC-Curve). UT showed an initial haemoglobin of Mdn 11.7 (IQR 9.2–14.3) g/dL and an INR value of Mdn 1.27 (IQR 1.11–1.69) as opposed to Mdn 12.3 (IQR 10–13.9) g/dL and Mdn 1.13 (IQR 1.05–1.34) in NT (haemoglobin: p = 0.786; INR: p = 0.215). There was an average number of 7.1(±3.4) rib fractures in UT and 6.7(±4.8) in NT (p = 0.649). Conclusions: Chest-tube output remains the single most important predictive factor for urgent thoracotomy also after blunt chest trauma. Patients with a chest-tube output of more than 1300 mL within 24 h after trauma should be considered for transfer to a level I trauma centre with standby thoracic surgery.
description: Finanziert durch den Open-Access-Publikationsfonds der Westfälischen Wilhelms-Universität Münster (WWU Münster).
Packer, J.I.: Auf den Spuren des Heiligen Geistes
Creators: name: Hahn, Eberhard
Publisher: name: Jahrbuch für evangelikale Theologie
Year: 2025

description: 1822653274
description: Jahrbuch für evangelikale Theologie, V. 4 (1990): Jahrbuch für evangelikale Theologie, Band 4
Embeddings of free groups into asymptotic cones of Hamiltonian diffeomorphisms
Creators: name: Alvarez-Gavela, Daniel
name: Kaminker, Victoria
name: Kislev, Asaf
name: Kliakhandler, Konstantin
name: Pavlichenko, Andrei
name: Rigolli, Lorenzo
name: Rosen, Daniel
name: Shabtai, Ood
name: Stevenson, Bret
name: Zhang, Jun
Publisher: name: arXiv
Year: 2016
Subjects: subject: Symplectic Geometry (math.SG)
subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 53Dxx, 37Jxx, 20F65

description: Given a symplectic surface $(Σ, ω)$ of genus $g \ge 4$, we show that the free group with two generators embeds into every asymptotic cone of $(\mathrm{Ham}(Σ, ω), d_\mathrm{H})$, where $d_\mathrm{H}$ is the Hofer metric. The result stabilizes to products with symplectically aspherical manifolds.
description: 32 pages, 5 figures
Thermodynamics of slow solutions to the Gas-Piston equations
Creators: name: Gubbiotti, G.
name: Chiuchiù, D.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Despite its historical importance, a perfect gas enclosed by a pistons and in contact with a thermal reservoirs is a system still largely under study. Its thermodynamic properties are not yet well understood when driven under non-equilibrium conditions. In particular, analytic formulas that describe the heat exchanged with the reservoir are rare. In this paper we prove a power series expansions for the heat when both the external force and the reservoir temperature are slowly varying over time but the overall process is not quasi-static. To do so, we use the dynamical equations from [Cerino \emph{et al.}, \textit{Phys. Rev. E}, \textbf{91} 032128] and an uncommon application of the regular perturbation technique.
description: 8 pages, 3 figures
A large-scale laboratory demonstrator for the production of oxygen from lunar regolith: Challenges and opportunities
Creators: name:  DENNIS HARRIES
name:   ALBERTO MAULU
name:   EMMANUEL SCOLAN
name:   KATHRYN HADLER
Publisher: name: Proceedings of the Aerospace Europe Conference - EUCASS - CEAS - 2023
Year: 2023
Subjects: LUNAR REGOLITH
ISRU
DEMONSTRATOR

description: Reduction of lunar minerals by hydrogen gas generates water. This principle has been the most longstanding idea to extract oxygen from the materials of the lunar surface. The ALCHEMIST-ED technology demonstrator serves to explore this process in a laboratory environment on a semi-industrial scale. We introduce the lunar geological baselines, give an overview of the system and discuss the challenges associated with the process. The learning opportunities and technological baselines arising from the planned studies will enable us to assess and advance the technology against competing approaches.
Straight spinning cosmic strings in Brans-Dicke gravity
Creators: name: Santos, S. Mittmann dos
name: da Silva, J. M. Hoff
name: Cindra, J. L.
Publisher: name: arXiv
Year: 2017
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: It is presented an exact solution of straight spinning cosmic strings in Brans-Dicke theory of gravitation. The possibility of the existence of closed timelike curves around these cosmic strings is analyzed. Furthermore, the stability about the formation of the topological defect discussed here is checked. It is shown the existence of a suitable choice for the integration constants in which closed timelike curves are not allowed. We also verify if it is possible that the obtained spacetime can be the source that describes the observed rotational curves in some galaxies.
description: 13 pages, 1 figure
Axion induced SUSY breaking and focus point gaugino mediation
Creators: name: Harigaya, Keisuke
name: Yanagida, Tsutomu T.
name: Yokozaki, Norimi
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We consider a scenario where the supersymmetry breaking and its mediation, and the cancellation of the theta parameter of SU(3)c are all caused by a single chiral multiplet. The string axion multiplet is a natural candidate of such a single superfield. We show that the scenario provides a convincing basis of focus point gaugino mediation, where the electroweak scale is explained with a moderate tuning among the parameters of the theory.
description: 21 pages, 2 figures; version to be published
The Garden of Eden Theorem for Cellular Automata on Group Sets
Creators: name: Wacker, Simon
Publisher: name: arXiv
Year: 2016
Subjects: subject: Group Theory (math.GR)
subject: Formal Languages and Automata Theory (cs.FL)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences

description: We prove the Garden of Eden theorem for cellular automata with finite set of states and finite neighbourhood on right amenable left homogeneous spaces with finite stabilisers. It states that the global transition function of such an automaton is surjective if and only if it is pre-injective. Pre-Injectivity means that two global configurations that differ at most on a finite subset and have the same image under the global transition function must be identical.
description: arXiv admin note: text overlap with arXiv:1603.06460
The matching relaxation for a class of generalized set partitioning problems
Creators: name: Samer, Phillippe
name: Cavalcante, Evellyn
name: Urrutia, Sebastián
name: Oppen, Johan
Publisher: name: arXiv
Year: 2016
Subjects: subject: Data Structures and Algorithms (cs.DS)
subject: Optimization and Control (math.OC)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics
subject: G.1.6; G.2.2; F.2.2; G.2.3
subject: 05, 68, 90

description: This paper introduces a discrete relaxation for the class of combinatorial optimization problems which can be described by a set partitioning formulation under packing constraints. We present two combinatorial relaxations based on computing maximum weighted matchings in suitable graphs. Besides providing dual bounds, the relaxations are also used on a variable reduction technique and a matheuristic. We show how that general method can be tailored to sample applications, and also perform a successful computational evaluation with benchmark instances of a problem in maritime logistics.
description: 33 pages. A preliminary (4-page) version of this paper was presented at CTW 2016 (Cologne-Twente Workshop on Graphs and Combinatorial Optimization), with proceedings on Electronic Notes in Discrete Mathematics
Dispersionless wave packets in Dirac materials
Creators: name: Jakubsky, Vit
name: Tusek, Matej
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We show that a wide class of quantum systems with translational invariance can host dispersionless, soliton-like, wave packets. We focus on the setting where the effective, two-dimensional Hamiltonian acquires the form of the Dirac operator. The proposed framework for construction of the dispersionless wave packets is illustrated on silicene-like systems with topologically nontrivial effective mass. Our analytical predictions are accompanied by a numerical analysis and possible experimental realizations are discussed.
description: 15 pages, accepted in the Annals of Physics
Topological characteristics of oil and gas reservoirs and their applications
Creators: name: Baikov, V. A.
name: Gilmanov, R. R.
name: Taimanov, I. A.
name: Yakovlev, A. A.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Computational Geometry (cs.CG)
subject: Geophysics (physics.geo-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: We demonstrate applications of topological characteristics of oil and gas reservoirs considered as three-dimensional bodies to geological modeling.
description: 12 pages
Detection of three Gamma-Ray Burst host galaxies at $z\sim6$
Creators: name: McGuire, J. T. W.
name: Tanvir, N. R.
name: Levan, A. J.
name: Trenti, M.
name: Stanway, E. R.
name: Shull, J. M.
name: Wiersema, K.
name: Perley, D. A.
name: Starling, R. L. C.
name: Bremer, M.
name: Stocke, J. T.
name: Hjorth, J.
name: Rhoads, J. E.
name: Curtis-Lake, E.
name: Schulze, S.
name: Levesque, E. M.
name: Robertson, B.
name: Fynbo, J. P. U.
name: Ellis, R. S.
name: Fruchter, A. S.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Long-duration Gamma-Ray Bursts (GRBs) allow us to pinpoint and study star-forming galaxies in the early universe, thanks to their orders of magnitude brighter peak luminosities compared to other astrophysical sources, and their association with deaths of massive stars. We present Hubble Space Telescope Wide Field Camera 3 detections of three Swift GRB host galaxies lying at redshifts $z = 5.913$ (GRB 130606A), $z = 6.295$ (GRB 050904), and $z = 6.327$ (GRB 140515A) in the F140W (wide-$JH$ band, $λ_{\rm{obs}}\sim1.4\,μm$) filter. The hosts have magnitudes (corrected for Galactic extinction) of $m_{\rm{λ_{obs},AB}}= 26.34^{+0.14}_{-0.16}, 27.56^{+0.18}_{-0.22},$ and $28.30^{+0.25}_{-0.33}$ respectively. In all three cases the probability of chance coincidence of lower redshift galaxies is $\lesssim2\,\%$, indicating that the detected galaxies are most likely the GRB hosts. These are the first detections of high redshift ($z > 5$) GRB host galaxies in emission. The galaxies have luminosities in the range $0.1-0.6\,L^{*}_{z=6}$ (with $M_{1600}^{*}=-20.95\pm0.12$), and half-light radii in the range $0.6-0.9\,\rm{kpc}$. Both their half-light radii and luminosities are consistent with existing samples of Lyman-break galaxies at $z\sim6$. Spectroscopic analysis of the GRB afterglows indicate low metallicities ($[\rm{M/H}]\lesssim-1$) and low dust extinction ($A_{\rm{V}}\lesssim0.1$) along the line of sight. Using stellar population synthesis models, we explore the implications of each galaxy's luminosity for its possible star formation history, and consider the potential for emission-line metallicity determination with the upcoming James Webb Space Telescope.
description: Published in ApJ
Geometrical versus time-series representation of data in quantum control learning
Creators: name: Ostaszewski, M.
name: Miszczak, J. A.
name: Sadowski, P.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Quantum Physics (quant-ph)
subject: Machine Learning (cs.LG)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Recently machine learning techniques have become popular for analysing physical systems and solving problems occurring in quantum computing. In this paper we focus on using such techniques for finding the sequence of physical operations implementing the given quantum logical operation. In this context we analyse the flexibility of the data representation and compare the applicability of two machine learning approaches based on different representations of data. We demonstrate that the utilization of the geometrical structure of control pulses is sufficient for achieving high-fidelity of the implemented evolution. We also demonstrate that artificial neural networks, unlike geometrical methods, posses the generalization abilities enabling them to generate control pulses for the systems with variable strength of the disturbance. The presented results suggest that in some quantum control scenarios, geometrical data representation and processing is competitive to more complex methods.
description: 12 pages, 14 figures, Python code available upon the request
Subhalo abundance matching in $f(R)$ gravity
Creators: name: He, Jian-Hua
name: Li, Baojiu
name: Baugh, Carlton M.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Using the liminality N-body simulations of Shi et. al., we present the first predictions for galaxy clustering in $f(R)$ gravity using subhalo abundance matching. We find that, for a given galaxy density, even for an $f(R)$ model with $f_{R0}=-10^{-6}$, for which the cold dark matter clustering is very similar to $Λ$CDM, the predicted clustering of galaxies in the $f(R)$ model is very different from $Λ$CDM. The deviation can be as large as $40\%$ for samples with mean densities close to that of $L_*$ galaxies. This large deviation is testable given the accuracy that future large-scale galaxy surveys aim to achieve. Our result demonstrates that galaxy surveys can provide a stringent test of General Relativity on cosmological scales, which is comparable to the tests from local astrophysical observations.
description: 5 pages, 3 figures, revised version, accepted for publication in PRL
Malaysia, Singapur, Indonesien
Creators: name: Evers, Hans-Dieter
name: Schweißhelm, Rebecca
name: Gerke, Solvay
Publisher: name: Humboldt-Universität zu Berlin
Year: 2004
Subjects: subject: 300 Sozialwissenschaften, Soziologie, Anthropologie
subject: LC 50400

description: Wissen wird in der heutigen Phase globaler und wirtschaftlicher Entwicklung als wichtigster Produktionsfaktor angesehen. Die Produktion, Verbreitung und Nutzung von Wissen ist wesentlich für Entwicklung. Auch Singapur, Malaysia und Indonesien sehen sich auf dem Weg zur Wissensgesellschaft. Sie setzen die Erkenntnis über die Bedeutung von Wissen als ein entscheidender Produktionsfaktor in entwicklungspolitische Strategien um und verfolgen dabei unterschiedliche Visionen und Konzepte in der Umsetzung ihrer Ziele. Kritiker sind allerdings skeptisch, dass die „Wissensrevolution“ den Ländern zu höheren Entwicklungsstadien verhelfen kann, sondern gehen davon aus, dass die Kluft zwischen Arm und Reich noch vertieft wird. // Dieser Aufsatz soll einen kurzen Überblick über die grundlegenden Merkmale einer Wissensgesellschaft geben. Es wird dargelegt wie weit Singapur, Malaysia und Indonesien auf dem Weg zur Wissensgesellschaft vorangeschritten sind, welche Schwierigkeiten und Probleme dabei auftauchen und welche gesellschaftlichen und sozialen Veränderungen mit der Entwicklung zu einer Wissensgesellschaft einhergehen.
Fermionic influence (action) on inflationary fluctuations
Creators: name: Boyanovsky, Daniel
Publisher: name: arXiv
Year: 2016
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Motivated by apparent persistent large scale anomalies in the CMB we study the influence of fermionic degrees of freedom on the dynamics of inflaton fluctuations as a possible source of violations of (nearly) scale invariance on cosmological scales. We obtain the non-equilibrium effective action of an inflaton-like scalar field with Yukawa interactions ($Y_{D,M}$) to light \emph{fermionic} degrees of freedom both for Dirac and Majorana fields in de Sitter space-time. The effective action leads to Langevin equations of motion for the fluctuations of the inflaton-like field, with self-energy corrections and a stochastic gaussian noise. We solve the Langevin equation in the super-Hubble limit implementing a dynamical renormalization group resummation. For a nearly massless inflaton its power spectrum of super Hubble fluctuations is \emph{enhanced}, $\mathcal{P}(k;η) = (\frac{H}{2π})^2\,e^{γ_t[-kη] }$ with $γ_t[-kη] = \frac{1}{6π^2} \Big[\sum_{i=1}^{N_D}{Y^2_{i,D}}+2\sum_{j=1}^{N_M}{Y^2_{j,M}}\Big]\,\Big\{\ln^2[-kη]-2 \ln[-kη]\ln[ -kη_0] \Big\} $ for $N_D$ Dirac and $N_M$ Majorana fermions, and $η_0$ is the renormalization scale at which the inflaton mass vanishes. The full power spectrum is shown to be renormalization group invariant. These corrections to the super-Hubble power spectrum entail a violation of scale invariance as a consequence of the coupling to the fermionic fields. The effective action is argued to be \emph{exact} in a limit of large number of fermionic fields. A cancellation between the enhancement from fermionic degrees of freedom and suppression from light scalar degrees of freedom \emph{conformally coupled to gravity} suggests the possibility of a finely tuned \emph{supersymmetry} among these fields.
description: matches published version. arXiv admin note: text overlap with arXiv:1511.06649
Existence and smoothness of the stable foliation for sectional hyperbolic attractors
Creators: name: Araújo, V.
name: Melbourne, I.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics

description: We prove the existence of a contracting invariant topological foliation in a full neighborhood for partially hyperbolic attractors. Under certain bunching conditions it can then be shown that this stable foliation is smooth. Specialising to sectional hyperbolic attractors, we give a verifiable condition for bunching. In particular, we show that the stable foliation for the classical Lorenz equation (and nearby vector fields) is better than $C^1$ which is crucial for recent results on exponential decay of correlations. In fact the foliation is at least $C^{1.278}$.
description: Corrected estimate for smoothness of stable foliation. Clarification of which results hold for general partially hyperbolic attractors. Some minor typos fixed. Accepted for publication in Bull. London Math. Soc
Approximation of quantum control correction scheme using deep neural networks
Creators: name: Ostaszewski, M.
name: Miszczak, J. A.
name: Sadowski, P.
name: Banchi, L.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Quantum Physics (quant-ph)
subject: Machine Learning (cs.LG)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: We study the functional relationship between quantum control pulses in the idealized case and the pulses in the presence of an unwanted drift. We show that a class of artificial neural networks called LSTM is able to model this functional relationship with high efficiency, and hence the correction scheme required to counterbalance the effect of the drift. Our solution allows studying the mapping from quantum control pulses to system dynamics and then analysing the robustness of the latter against local variations in the control profile.
description: 6 pages, 3 figures, Python code available upon request. arXiv admin note: text overlap with arXiv:1803.05169
Numerical Simulation of 2.5-Set of Iterated Stratonovich Stochastic Integrals of Multiplicities 1 to 5 From the Taylor-Stratonovich Expansion
Creators: name: Kuznetsov, Dmitriy F.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics

description: The article is devoted to construction of effective procedures of the mean-square approximation for iterated Stratonovich stochastic integrals of multiplicities 1 to 5. We apply the method of generalized multiple Fourier series for approximation of iterated stochastic integrals. More precisely, we use multiple Fourier-Legendre series converging in the sense of norm in Hilbert space $L_2([t,T]^k),$ $k\in\mathbb{N}.$ Considered iterated Stratonovich stochastic integrals are part of the Taylor-Stratonovich expansion. That is why the results of the article can be applied to implementation of numerical methods with the orders 1.0, 1.5, 2.0 and 2.5 of strong convergence for Ito stochastic differential equations with multidimensional non-commutative noise.
description: 29 pages. Minor changes. arXiv admin note: substantial text overlap with arXiv:1712.08991, arXiv:1802.04844, arXiv:1901.02345, arXiv:1712.09516, arXiv:1801.01564, arXiv:1802.00643, arXiv:1805.12527, arXiv:1801.00231, arXiv:1801.05654, arXiv:1801.03195
Darboux-Moutard transformations and Poincare-Steklov operators
Creators: name: Novikov, R. G.
name: Taimanov, I. A.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Analysis of PDEs (math.AP)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: Formulas relating Poincare-Steklov operators for Schroedinger equations related by Darboux-Moutard transformations are derived. They can be used for testing algorithms of reconstruction of the potential from measurements at the boundary.
description: 13 pages
Reynolds-dependence of turbulent skin-friction drag reduction induced by spanwise forcing
Creators: name: Gatti, Davide
name: Quadrio, Maurizio
Publisher: name: arXiv
Year: 2015
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: This paper examines how increasing the value of the Reynolds number $Re$ affects the ability of spanwise-forcing techniques to yield turbulent skin-friction drag reduction. The considered forcing is based on the streamwise-travelling waves of spanwise wall velocity (Quadrio {\em et al. J. Fluid Mech.}, vol. 627, 2009, pp. 161--178). The study builds upon an extensive drag-reduction database created with Direct Numerical Simulation of a turbulent channel flow for two, 5-fold separated values of $Re$, namely $Re_τ=200$ and $Re_τ=1000$. The sheer size of the database, which for the first time systematically addresses the amplitude of the forcing, allows a comprehensive view of the drag-reducing characteristics of the travelling waves, and enables a detailed description of the changes occurring when $Re$ increases. The effect of using a viscous scaling based on the friction velocity of either the non-controlled flow or the drag-reduced flow is described. In analogy with other wall-based drag reduction techniques, like for example riblets, the performance of the travelling waves is well described by a vertical shift of the logarithmic portion of the mean streamwise velocity profile. Except when $Re$ is very low, this shift remains constant with $Re$, at odds with the percentage reduction of the friction coefficient, which is known to present a mild, logarithmic decline. Our new data agree with the available literature, which is however mostly based on low-$Re$ information and hence predicts a quick drop of maximum drag reduction with $Re$. The present study supports a more optimistic scenario, where for an airplane at flight Reynolds numbers a drag reduction of nearly 30\% would still be possible thanks to the travelling waves.
Raupp, Werner: Ludwig Hofacker und die schwäbische Erweckungspredigt
Creators: name: Hohmeier, Friedebert
Publisher: name: Jahrbuch für evangelikale Theologie
Year: 2025

description: 1822651670
description: Jahrbuch für evangelikale Theologie, V. 4 (1990): Jahrbuch für evangelikale Theologie, Band 4
Thermo-magnetic properties of the strong coupling in the local Nambu--Jona-Lasinio model
Creators: name: Ayala, Alejandro
name: Dominguez, C. A.
name: Hernandez, L. A.
name: Loewe, M.
name: Raya, Alfredo
name: Rojas, J. C.
name: Villavicencio, C.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Lattice (hep-lat)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We study the thermo-magnetic properties of the strong coupling constant G and quark mass M entering the Nambu-Jona-Lasinio model. For this purpose, we compute the quark condensate and compare it to lattice QCD (LQCD) results to extract the behavior of G and M as functions of the magnetic field strength and temperature. We find that at zero temperature, where the LQCD condensate is found to monotonically increase with the field strength, M also increases whereas G remains approximately constant. However, for temperatures above the chiral/deconfinement phase transitions, where the LQCD condensate is found to monotonically decrease with increasing field, M and G also decrease monotonically. For finite temperatures, below the transition temperature, we find that both G and M initially grow and then decrease with increasing field strength. To study possible consequences of the extracted temperature and magnetic field dependence of G and M, we compute the pressure and compare to LQCD results, finding an excellent qualitative agreement. In particular, we show that the transverse pressure, as a function of the field strength, is always negative for temperatures below the transition temperature whereas it starts off being positive and then becomes negative for temperatures above the transition temperature, also in agreement with LQCD results. We also show that for the longitudinal pressure to agree with LQCD calculations, the system should be described as a diamagnet. We argue that the turnover of M and G as functions of temperature and field strength is a key element that drives the behavior of the quark condensate going across the transition temperature and provides clues for a better understanding of the inverse magnetic catalysis phenomenon.
description: 9 pages, 11 figures. Improved analysis separating the vacuum, magnetic and thermo-magnetic contributions and re-scaling of the model's critical temperature. Added analysis on the behavior of the longitudinal and transverse pressures and its relation to the diamagnetic properties both below and above the critical temperature. Version to appear in Phys. Rev. D
Brecht, Martin (Hrsg.): Pietismus und Neuzeit
Creators: name: Padberg, Lutz Von
Publisher: name: Jahrbuch für evangelikale Theologie
Year: 2025

description: 1822651433
description: Jahrbuch für evangelikale Theologie, V. 4 (1990): Jahrbuch für evangelikale Theologie, Band 4
Closed geodesics on connected sums and 3-manifolds
Creators: name: Rademacher, Hans-Bert
name: Taimanov, Iskander A.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics

description: We study the asymptotics of the number N(t) of geometrically distinct closed geodesics of a Riemannian or Finsler metric on a connected sum of two compact manifolds of dimension at least three with non-trivial fundamental groups and apply this result to the prime decomposition of a three-manifold. In particular we show that the function N(t) grows at least like the prime numbers on a compact 3-manifold with infinite fundamental group. It follows that a generic Riemannian metric on a compact 3-manifold has infinitely many geometrically distinct closed geodesics. We also consider the case of a connected sum of a compact manifold with positive first Betti number and a simply-connected manifold which is not homeomorphic to a sphere.
description: 15 pages
Tightening the uncertainty principle for stochastic currents
Creators: name: Polettini, M.
name: Lazarescu, A.
name: Esposito, M.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We connect two recent advances in the stochastic analysis of nonequilibrium systems: the (loose) uncertainty principle for the currents, which states that statistical errors are bounded by thermodynamic dissipation; and the analysis of thermodynamic consistency of the currents in the light of symmetries. Employing the large deviation techniques presented in [Gingrich et al., Phys. Rev. Lett. 2016] and [Pietzonka et al., Phys. Rev. E 2016], we provide a short proof of the loose uncertainty principle, and prove a tighter uncertainty relation for a class of thermodynamically consistent currents $J$. Our bound involves a measure of partial entropy production, that we interpret as the least amount of entropy that a system sustaining current $J$ can possibly produce, at a given steady state. We provide a complete mathematical discussion of quadratic bounds which allows to determine which are optimal, and finally we argue that the relationship for the Fano factor of the entropy production rate $\mathrm{var}\, σ/ \mathrm{mean}\, σ\geq 2$ is the most significant realization of the loose bound. We base our analysis both on the formalism of diffusions, and of Markov jump processes in the light of Schnakenberg's cycle analysis.
description: 13 pages, 4 figures
Quantum sketching protocols for Hamming distance and beyond
Creators: name: Doriguello, João F.
name: Montanaro, Ashley
Publisher: name: arXiv
Year: 2018
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In this work we use the concept of quantum fingerprinting to develop a quantum communication protocol in the simultaneous message passing model that calculates the Hamming distance between two $n$-bit strings up to relative error $ε$. The number of qubits communicated by the protocol is polynomial in $\log{n}$ and $1/ε$, while any classical protocol must communicate $Ω(\sqrt{n})$ bits. Motivated by the relationship between Hamming distance and vertex distance in hypercubes, we apply the protocol to approximately calculate distances between vertices in graphs that can be embedded into a hypercube such that all distances are preserved up to a constant factor. Such graphs are known as $\ell_1$-graphs. This class includes all trees, median graphs, Johnson graphs and Hamming graphs. Our protocol is efficient for $\ell_1$-graphs with low diameter, and we show that its dependence on the diameter is essentially optimal. Finally, we show that our protocol can be used to approximately compute $\ell_1$-distances between vectors efficiently.
description: 11 pages; v3: epsilon dependence was improved and typos corrected; v4: appendix on $\ell_1$-graphs characterisation deleted due to a mistake and references added
Confinement transition to density wave order in metallic doped spin liquids
Creators: name: Patel, Aavishkar A.
name: Chowdhury, Debanjan
name: Allais, Andrea
name: Sachdev, Subir
Publisher: name: arXiv
Year: 2016
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Insulating quantum spin liquids can undergo a confinement transition to a valence bond solid state via the condensation of topological excitations of the associated gauge theory. We extend the theory of such transitions to fractionalized Fermi liquids (FL*): these are metallic doped spin liquids in which the Fermi surfaces only have gauge neutral quasiparticles. Using insights from a duality transform on a doped quantum dimer model for the U(1)-FL* state, we show that projective symmetry group of the theory of the topological excitations remains unmodified, but the Fermi surfaces can lead to additional frustrating interactions. We propose a theory for the confinement transition of $\mathbb{Z}_2$-FL* states via the condensation of visons. A variety of confining, incommensurate density wave states are possible, including some that are similar to the incommensurate $d$-form factor density wave order observed in several recent experiments on the cuprate superconductors.
description: 31 pages, 8 figures, to appear in Phys. Rev. B
Embodied Enquiry through Storymaking: Collective interpretation and meaning-making of one’s lived experience in co-design workshops
Creators: name: Anderson, Kelly
Publisher: name: Monash University
Year: 2023
Subjects: Design anthropology
Design practice and methods
Design history, theory and criticism

description: Embodied enquiry is a workshop process that scaffolds the active questioning of a participant’s lived experience through three activities for the purpose of interpretation and analysis: form-making, sense-making, meaning-making. An experience is much more than the sum of its actions, and through embodied enquiry we can begin making meaning of the wider context an experience exists within.
MARVEL - D7.1: Project website
Creators: name: Kallipolitou, Dora
Publisher: name: Zenodo
Year: 2021
Subjects: smart cities
website
dissemination
Edge-to-Fog-to-Cloud (E2F2C)
social media

description: This deliverable presents the work performed in WP7, Task7.2 “Dissemination strategy and communication activities triggering awareness and new business opportunities” with respect to the design and development of the MARVEL website. The main objective of this deliverable is to develop the underlying infrastructure in order to effectively shape the formal online presence of MARVEL and serve as a key instrument for supporting the dissemination of the research results as well as a useful and informative point of contact with the wider audience, which has perhaps already been reached via other channels.