cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Real-time Optimization and Adaptation of the Crosswind Flight of Tethered Wings for Airborne Wind Energy
Creators: name: Zgraggen, Aldo U.
name: Fagiano, Lorenzo
name: Morari, Manfred
Publisher: name: arXiv
Year: 2013
Subjects: subject: Systems and Control (eess.SY)
subject: Optimization and Control (math.OC)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Mathematics

description: Airborne wind energy systems aim to generate renewable energy by means of the aerodynamic lift produced by a wing tethered to the ground and controlled to fly crosswind paths. The problem of maximizing the average power developed by the generator, in presence of limited information on wind speed and direction, is considered. At constant tether speed operation, the power is related to the traction force generated by the wing. First, a study of the traction force is presented for a general path parametrization. In particular, the sensitivity of the traction force on the path parameters is analyzed. Then, the results of this analysis are exploited to design an algorithm to maximize the force, hence the power, in real-time. The algorithm uses only the measured traction force on the tether and it is able to adapt the system's operation to maximize the average force with uncertain and time-varying wind. The influence of inaccurate sensor readings and turbulent wind are also discussed. The presented algorithm is not dependent on a specific hardware setup and can act as an extension of existing control structures. Both numerical simulations and experimental results are presented to highlight the effectiveness of the approach.
description: This manuscript is a preprint of a paper submitted for possible publication on the IEEE Transactions on Control Systems Technology and is subject to IEEE Copyright. If accepted, the copy of record will be available at IEEEXplore library: http://ieeexplore.ieee.org/
New nonlinear equation of KdV-type for a non-flat bottom
Creators: name: Karczewska, Anna
name: Rozmej, Piotr
name: Rutkowski, Łukasz
Publisher: name: arXiv
Year: 2014
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: In the paper a new nonlinear equation describing shallow water waves with the topography of the bottom directly taken into account is derived. This equation is valid in the weakly nonlinear, dispersive and long wavelength limit. Some examples of soliton motion for various bottom shapes obtained in numerical simulations according to the derived equation are presented.
description: 16 pages, 10 figures
Lossy Micromaser Battery: Almost Pure States in the Jaynes-Cummings Regime
Creators: name: Shaghaghi, Vahid
name: Singh, Varinder
name: Carrega, Matteo
name: Rosa, Dario
name: Benenti, Giuliano
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We consider a micromaser model of a quantum battery, where the battery is a single mode of the electromagnetic field in a cavity, charged via repeated interactions with a stream of qubits, all prepared in the same non-equilibrium state, either incoherent or coherent, with the matter-field interaction modeled by the Jaynes-Cummings model. We show that the coherent protocol is superior to the incoherent one, in that an effective pure steady state is achieved for generic values of the model parameters. Finally, we supplement the above collision model with cavity losses, described by a Lindblad master equation. We show that battery performances, in terms of stored energy, charging power, and steady-state purity, are slightly degraded up to moderated dissipation rate. Our results show that micromasers are robust and reliable quantum batteries, thus making them a promising model for experimental implementations.
description: 15 pages, 7 figures
Exact quantum dynamics of yrast states in the finite 1D Bose gas
Creators: name: Kaminishi, Eriko
name: Sato, Jun
name: Deguchi, Tetsuo
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We demonstrate that the quantum dynamics of yrast states in the one-dimensional (1D) Bose gas gives an illustrative example to equilibration of an isolated quantum many-body system. We first formulate the energy spectrum of yrast states in terms of the dressed energy by applying the method of finite-size corrections. We then review the exact time evolution of quantum states constructed from yrast states shown by the Bethe ansatz. In time evolution the density profile of an initially localized quantum state constructed from yrast states collapses into a flat profile in the case of a large particle number such as N=1000, while recurrence of the localized state occurs in the case of a small particle number such as N=20. We suggest that the dynamical relaxation behavior for the large N case is consistent with the viewpoint of typicality for generic quantum states: the expectation values of local operators valuated in most of quantum states are very close to those of the micro-canonical ensemble.
description: 9 pages, 2 figures, Proceedings of the LPHYS'13 Workshop
title: Understanding the Social Sciences and Humanities in Europe
Creators: name: Heilbron, Johan
name: Boncourt, Thibaud
name: Timans, Rob
Publisher: name: Karl-Franzens-Universität Graz
Year: 2017

description: Serendipities. Journal for the Sociology and History of the Social Sciences; Volume 2017 (2); Issue 1;
  Pages: 1-9; ISSN: 2521-0947
Bose-Einstein Condensates with Cavity-Mediated Spin-Orbit Coupling
Creators: name: Deng, Y.
name: Cheng, J.
name: Jing, H.
name: Yi, S.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We propose a novel scheme to generate the spin-orbit coupling for a condensate placed inside an optical cavity by using a standing wave and a traveling wave. It is shown that the interplay of the laser lights and the cavity gives rise to rich quantum phases. Our scheme also generates an nontrivial lattice of the magnetic flux, which may facilitate the study of the exotic quantum phases.
description: 5 pages, 5 figures
Modeling of clearance, retention, and translocation of inhaled gold nanoparticles in rats
Creators: name: Krikas, A.
name: Neofytou, P.
name: Gakis, G. P.
name: Xiarchos, I.
name: Charitidis, C.
name: Tran, L.
Publisher: name: Taylor & Francis
Year: 2024
Subjects: subject: Biophysics
subject: Space Science
subject: Physical Sciences not elsewhere classified
subject: Medicine
subject: Molecular Biology
subject: Pharmacology
subject: Biotechnology
subject: Biological Sciences not elsewhere classified
subject: Information Systems not elsewhere classified
subject: Inorganic Chemistry
subject: FOS: Chemical sciences

description: Objective: The increasing exposure to gold nanoparticles (AuNPs), due to their wide range of applications, has led to the need for thorough understanding of their biodistribution, following exposure. The objective of this paper is to develop a PBK model in order to study the clearance, retention and translocation of inhaled gold nanoparticles in rats, providing a basis for the understanding of the absorption, distribution, metabolism and elimination (ADME) mechanisms of AuNPs in various organs. Materials and methods: A rat PBK computational model was developed, connected to a detailed respiratory model, including the olfactory, tracheobronchial, and alveolar regions. This model was coupled with a Multiple Path Particle Dosimetry (MPPD) model to appropriately simulate the exposure to AuNPs. Three existing in vivo experimental datasets from scientific literature for the biodistribution of inhaled AuNPs for different AuNP sizes and exposure scenarios were utilized for model calibration and validation. Results and Discussion: The model was calibrated using two individual datasets for nose only inhaled and intratracheally instilled AuNPs, while an independent dataset for nose only inhaled AuNPs was used as external validation. The overall fitting over the three datasets was proved acceptable as shown by the relevant statistical metrics. The influence of several physiological parameters is also studied via a sensitivity analysis, providing useful insights into the mechanisms of NP pharmacokinetics. The key aspects of the inhaled AuNPs biodistribution are discussed, revealing the key mechanisms for the AuNPs absorption routes, the AuNP uptake by secondary organs and the influence of the AuNP size on the translocation from the lungs to blood circulation. Conclusions: The model results together with the model sensitivity analysis clarified the key mechanisms for the inhaled AuNPs biodistribution to secondary organs. It was observed that nose-only inhaled AuNPs of smaller size can enter the blood circulation through secondary routes, such as absorption through the gastrointestinal (GI) lumen, showing that such translocations should not be underestimated in biodistribution modelling. Finally, the computational framework presented in this study can be used as a basis for a more wide investigation of inhaled nanoparticles biodistribution, including interspecies extrapolation of the resulting PBK model for the inhalation and subsequent biodistribution of AuNPs in humans.
MPEC 2023-V81 : 2023 VJ2
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 VJ2

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.
Spectral Gaps of Almost Mathieu Operator in Exponential Regime
Creators: name: Liu, Wencai
name: Yuan, Xiaoping
Publisher: name: arXiv
Year: 2013
Subjects: subject: Spectral Theory (math.SP)
subject: FOS: Mathematics

description: For almost Mathieu operator $(H_{λ,α,θ}u)_n=u_{n+1}+u_{n-1}+2λ\cos2π(θ+nα)u_n$, the dry version of Ten Martini problem predicts that the spectrum $Σ_{λ,α}$ of $ H_{λ,α,θ}$ has all gaps open for all $λ\neq 0$ and $ α\in \mathbb{R}\backslash \mathbb{Q}$. Avila and Jitomirskaya prove that $Σ_{λ,α}$ has all gaps open for Diophantine $α$ and $0
Securing Safety in Collaborative Cyber-Physical Systems through Fault Criticality Analysis
Creators: name: Hussain, Manzoor
name: Ali, Nazakat
name: Hong, Jang-Eui
Publisher: name: arXiv
Year: 2023
Subjects: subject: Software Engineering (cs.SE)
subject: Performance (cs.PF)
subject: Systems and Control (eess.SY)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Collaborative Cyber-Physical Systems (CCPS) are systems that contain tightly coupled physical and cyber components, massively interconnected subsystems, and collaborate to achieve a common goal. The safety of a single Cyber-Physical System (CPS) can be achieved by following the safety standards such as ISO 26262 and IEC 61508 or by applying hazard analysis techniques. However, due to the complex, highly interconnected, heterogeneous, and collaborative nature of CCPS, a fault in one CPS's components can trigger many other faults in other collaborating CPSs. Therefore, a safety assurance technique based on fault criticality analysis would require to ensure safety in CCPS. This paper presents a Fault Criticality Matrix (FCM) implemented in our tool called CPSTracer, which contains several data such as identified fault, fault criticality, safety guard, etc. The proposed FCM is based on composite hazard analysis and content-based relationships among the hazard analysis artifacts, and ensures that the safety guard controls the identified faults at design time; thus, we can effectively manage and control the fault at the design phase to ensure the safe development of CPSs. To validate our approach, we introduce a case study on the Platooning system (a collaborative CPS). We perform the criticality analysis of the Platooning system using FCM in our developed tool. After the detailed fault criticality analysis, we investigate the results to check the appropriateness and effectiveness with two research questions. Also, by performing simulation for the Platooning, we showed that the rate of collision of the Platooning system without using FCM was quite high as compared to the rate of collisions of the system after analyzing the fault criticality using FCM.
description: This paper is an extended version of an article submitted to KCSE-2021
ASSESSMENT OF ASSOCIATION BETWEEN PARENTAL FEEDING PRACTICE AND CHILDREN EATING BEHAVIOR AMONG PRESCHOOL CHILDREN IN ADDIS ABABA.
Creators: name: NARDOS WONDAFRASH (BSC.)
Publisher: name: Zenodo
Year: 2019

description: Background: Low and middle-income countries are facing both extremes of public health nutrition problems. Despite the well-established risk factors of mal-nutrition, individual differences in eating behaviors may contribute to the existing variation in nutritional status. Eating behaviors are biological and behavioral processes directed towards meeting bodily requirements; and these behaviors develop during the first years of life. Eating behaviors can be categorized as food approach and food avoidant. Some of the food approach behaviors are enjoyment of food (EF), food responsiveness (FR), emotional overeating (EOE), desire to drink (DD), and food avoidant behaviors are satiety responsiveness (SR), slowness in eating (SE), emotional under eating (EUE) and food fussiness (FF). Parents and caregivers influence their children’s eating behavior through communicating their attitudes and beliefs about food and feeding
Probing $L$-violating coupling via sbottom resonance production at the LHeC
Creators: name: Ren-You, Zhang
name: Hua, Wei
name: Liang, Han
name: Wen-Gan, Ma
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We investigate the resonant production of the lighter sbottom at the proposed Large Hadron Electron Collider and its subsequent decay into $e^- + jet$ final state, under the single coupling dominance hypothesis in the framework of the $R$-parity-violating minimal supersymmetric standard model. It is concluded that the LHeC running at the high electron beam energy configuration of $E_e = 150 {\rm GeV}$ would provide excellent opportunities to search for the sbottom resonance and probe the lepton-number-violating $\hat{L}\hat{Q}\hat{D}$ $λ^{\prime}_{113}$-type Yukawa interaction. With about $1 fb^{-1}$ integrated luminosity expected in $E_e = 150 {\rm GeV}$ $e^-p$ collision at the LHeC, either the lighter sbottom RPV resonance could be directly detected up to $1 {\rm TeV}$, or the $L$-violating coupling $λ^{\prime}_{113}$ could be constrained at an unprecedented level of precision compared with all the knowledge derived from indirect measurements.
description: 15 pages, 7 figures
title: The Struggles for European Science. A Comparative Perspective on the History of European Social Science Associations
Creators: name: Boncourt, Thibaud
Publisher: name: Karl-Franzens-Universität Graz
Year: 2017

description: Serendipities. Journal for the Sociology and History of the Social Sciences; Volume 2017 (2); Issue 1;
  Pages: 10-32; ISSN: 2521-0947
Provably Efficient Model-Free Algorithms for Non-stationary CMDPs
Creators: name: Wei, Honghao
name: Ghosh, Arnob
name: Shroff, Ness
name: Ying, Lei
name: Zhou, Xingyu
Publisher: name: arXiv
Year: 2023
Subjects: subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: We study model-free reinforcement learning (RL) algorithms in episodic non-stationary constrained Markov Decision Processes (CMDPs), in which an agent aims to maximize the expected cumulative reward subject to a cumulative constraint on the expected utility (cost). In the non-stationary environment, reward, utility functions, and transition kernels can vary arbitrarily over time as long as the cumulative variations do not exceed certain variation budgets. We propose the first model-free, simulator-free RL algorithms with sublinear regret and zero constraint violation for non-stationary CMDPs in both tabular and linear function approximation settings with provable performance guarantees. Our results on regret bound and constraint violation for the tabular case match the corresponding best results for stationary CMDPs when the total budget is known. Additionally, we present a general framework for addressing the well-known challenges associated with analyzing non-stationary CMDPs, without requiring prior knowledge of the variation budget. We apply the approach for both tabular and linear approximation settings.
Dynamics of flexible fibers in confined shear flows at finite Reynolds numbers
Creators: name: Su, Jian
name: Ma, Kun
name: Yan, Zhongyu
name: He, Qiaolin
name: Xu, Xinpeng
Publisher: name: arXiv
Year: 2022
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We carry out a numerical study on the dynamics of a single non-Brownian flexible fiber in two-dimensional Couette flows at finite Reynolds numbers. We employ the bead-spring model of flexible fibers to extend the fluid particle dynamics (FPD) method that is originally developed for rigid particles in viscous liquids. We implement the extended FPD method using a multiple-relaxation-time (MRT) scheme of the lattice Boltzmann method (LBM). The numerical scheme is validated firstly by a series of benchmark simulations that involve liquid-solid coupling. The method is then used to study the dynamics of flexible fibers in Couette flows. We only consider the highly symmetric case where the fibers are placed on the symmetry center of Couette flows and we focus on the effects of the fiber stiffness, the confinement strength, and the finite Reynolds number (from 1 to 10). A diagram of the fiber shape is obtained. For fibers under weak confinement and a small Reynolds number, three distinct tumbling orbits have been identified. (1) Jeffery orbits of rigid fibers. The fibers behave like rigid rods and tumble periodically without any visible deformation. (2) S-turn orbits of slightly flexible fibers. The fiber is bent to an S-shape and is straightened again when it orients to an angle of around 45 degrees relative to the positive x direction. (3) S-coiled orbits of fairly flexible fibers. The fiber is folded to an S-shape and tumbles periodically and steadily without being straightened anymore during its rotation. Moreover, the fiber tumbling is found to be hindered by increasing either the Reynolds number or the confinement strength, or both.
description: 16 pages, 10 figures
title: European Journals in the Social Sciences and Humanities
Creators: name: Heilbron, Johan
name: Bedecarré, Madeline
name: Timans, Rob
Publisher: name: Karl-Franzens-Universität Graz
Year: 2017

description: Serendipities. Journal for the Sociology and History of the Social Sciences; Volume 2017 (2); Issue 1;
  Pages: 33-49; ISSN: 2521-0947
title: The Cases of the European Values Study and the European Social Survey – European Constellations of Social Science Knowledge Production
Creators: name: Kropp, Kristoffer
Publisher: name: Karl-Franzens-Universität Graz
Year: 2017

description: Serendipities. Journal for the Sociology and History of the Social Sciences; Volume 2017 (2); Issue 1;
  Pages: 50-68; ISSN: 2521-0947
Tomonaga Luttinger liquid in the topological edge channel of multilayer FeSe
Creators: name: Zhang, Huimin
name: Zou, Qiang
name: Li, Lian
Publisher: name: arXiv
Year: 2023
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: A two dimensional topological insulator exhibits helical edge states topologically protected against single particle backscattering. Such protection breaks down, however, when electron electron interactions are significant or when edge reconstruction occurs, leading to suppressed density of states (DOS) at Fermi level that follows universal scaling with temperature and energy, characteristic of Tomonaga Luttinger liquid (TLL). Here, we grow multilayer FeSe on SrTiO3 by molecular beam epitaxy, and observe robust edge states at both {100}Se and {110}Se steps using scanning tunneling microscopy/spectroscopy. We determine the DOS follows a power law, resulting in Luttinger parameter K of 0.26 +/- 0.02 and 0.43 +/- 0.07 for {100}Se and {110}Se edges, respectively. The smaller K for the {100}Se edge also indicates strong correlations, attributed to ferromagnetic ordering likely present due to checkerboard antiferromagnetic fluctuations in FeSe. These results demonstrate TLL in FeSe helical edge channels, providing an exciting model system for novel topological excitations arising from superconductivity and interacting helical edge states.
description: 28 pages
Spectroscopy and Orbital Analysis of Bright Bolides Observed over the Iberian Peninsula from 2010 to 2012
Creators: name: Madiedo, J. M.
name: Trigo-Rodriguez, J. M.
name: Ortiz, J. L.
name: Castro-Tirado, A. J.
name: Pastor, S.
name: Reyes, J. A. de los
name: Cabrera-Cano, J.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We present the analysis of the atmospheric trajectory and orbital data of four bright bolides observed over Spain, one of which is a potential meteorite dropping event. Their absolute magnitude ranges from -10 to -11. Two of these are of sporadic origin, although a Geminid and a kappa-Cygnid fireball are also considered. These events were recorded in the framework of the continuous fireball monitoring and spectroscopy campaigns developed by the SPanish Meteor Network (SPMN) between 2010 and 2012. The tensile strength of the parent meteoroids is estimated and the abundances of the main rock-forming elements in these particles are calculated from the emission spectrum obtained for three of these events. This analysis revealed a chondritic nature for these meteoroids.
description: Manuscript in press in Monthly Notices of the Royal Astronomical Society
title: Legitimising Europe with the Social Sciences and Humanities? The European University Institute and the European Integration Project (1976-1986)
Creators: name: Boncourt, Thibaud
name: Calligaro, Oriane
Publisher: name: Karl-Franzens-Universität Graz
Year: 2017

description: Serendipities. Journal for the Sociology and History of the Social Sciences; Volume 2017 (2); Issue 1;
  Pages: 69-89; ISSN: 2521-0947
First-principles prediction of superconductivity in MgB$_3$C$_3$
Creators: name: Pham, Truong-Tho
name: Nguyen, Duc-Long
Publisher: name: arXiv
Year: 2022
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: From first-principles density functional theory calculations, we propose hexagonal layered MgB$_3$C$_3$ as a potential phonon-mediated superconductor at 59 K, which is far higher than the superconductivity of MgB$_2$ ($\approx$ 39 K). The MgB$_3$C$_3$ is energetically and dynamically stable at ambient pressure in the \textit{P-62m} hexagonal structure with c/a $\approx$ 0.79 and forms in stacks of honeycomb B-C layers with Mg as a space filler. Band structure calculations indicate that the bands at the Fermi level derive mainly from B and C orbitals in which two $σ$- and two $π$ bands both contribute to the total density of state. The $π$ bands are found to be strongly couple with out-of-plane acoustic phonon mode, while the $σ$ bands coupled with the in-plane bond-stretching optical E$^{\prime} $ phonon modes produces a sizable superconductivity in MgB$_3$C$_3$.
Non-local spectroscopy of Andreev bound states
Creators: name: Schindele, Jens
name: Baumgartner, Andreas
name: Maurand, Romain
name: Weiss, Markus
name: Schönenberger, Christian
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We experimentally investigate Andreev bound states (ABSs) in a carbon nanotube quantum dot (QD) connected to a superconducting Nb lead (S). A weakly coupled normal metal contact acts as a tunnel probe that measures the energy dispersion of the ABSs. Moreover we study the response of the ABS to non-local transport processes, namely Cooper pair splitting and elastic co-tunnelling, that are enabled by a second QD fabricated on the same nanotube on the opposite side of S. We find an appreciable non-local conductance with a rich structure, including a sign reversal at the ground state transition from the ABS singlet to a degenerate magnetic doublet. We describe our device by a simple rate equation model that captures the key features of our observations and demonstrates that the sign of the non-local conductance is a measure for the charge distribution of the ABS, given by the respective Bogoliubov-de Gennes amplitudes $u$ and $v$.
Photon Diffusion in Microscale Solids
Creators: name: Das, Avijit
name: Brown, Andrew K.
name: Mah, Merlin L.
name: Talghader, Joseph J.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Applied Physics (physics.app-ph)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: This paper presents a theoretical and experimental investigation of photon diffusion in highly absorbing microscale graphite. An Nd:YAG continuous wave (CW) laser is used to heat the graphite samples with thicknesses of 40 microns and 100 microns. Optical intensities of 10 kW/cm^2 and 20 kW/cm^2 are used in laser heating. The graphite samples are heated to temperatures of thousands of kelvins within milliseconds, which are recorded by a 2-color, high-speed pyrometer. To compare the observed temperatures, the differential equation of heat conduction is solved across the samples with proper initial and boundary conditions. In addition to lattice vibrations, photon diffusion is incorporated into the analytical model of thermal conductivity for solving the heat equation. The numerical simulations showed close matching between experiment and theory only when including the photon diffusion equations and existing material properties data found in the previously published works with no fitting constants. The results indicate that the commonly-overlooked mechanism of photon diffusion dominates the heat transfer of many microscale structures near their evaporation temperatures. In addition, the treatment explains the discrepancies between thermal conductivity measurements and theory that were previously described in the scientific literature.
description: 8 pages, 7 figures, (N.B. there is a typo and minor correction in Table 1 and References in the online version of the journal, corrected and highlighted in this PDF)
Analytical classification of the permanent rotations of the Kowalevski-Yehia gyrostat
Creators: name: Kharlamov, Mikhail P.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: Dynamical Systems (math.DS)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 70E17, 70G40

description: The complete investigation of the permanent rotations of a gyrostat in the integrable case of Kowalevski-Yehia is presented. The notion of equivalence classes is given with respect to the defining parameters, the separating set is constructed. For each class the type of a singularity is calculated as the type of a fixed point in the reduced system. The detailed character of stability is obtained, and the structure of local Liouville foliation is shown.
description: LaTex, 15 pages, 2 figures, 1 table
Interpretability is not Explainability: New Quantitative XAI Approach with a focus on Recommender Systems in Education
Creators: name: Porcedda, Riccardo
Publisher: name: arXiv
Year: 2023
Subjects: subject: Information Retrieval (cs.IR)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: The field of eXplainable Artificial Intelligence faces challenges due to the absence of a widely accepted taxonomy that facilitates the quantitative evaluation of explainability in Machine Learning algorithms. In this paper, we propose a novel taxonomy that addresses the current gap in the literature by providing a clear and unambiguous understanding of the key concepts and relationships in XAI. Our approach is rooted in a systematic analysis of existing definitions and frameworks, with a focus on transparency, interpretability, completeness, complexity and understandability as essential dimensions of explainability. This comprehensive taxonomy aims to establish a shared vocabulary for future research. To demonstrate the utility of our proposed taxonomy, we examine a case study of a Recommender System designed to curate and recommend the most suitable online resources from MERLOT. By employing the SHAP package, we quantify and enhance the explainability of the RS within the context of our newly developed taxonomy.
Dynamic polarizability of Rydberg atoms: Applicability of near-free electron approximation, gauge invariance and the Dirac sea
Creators: name: Topcu, Turker
name: Derevianko, Andrei
Publisher: name: arXiv
Year: 2013
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: Ponderomotive energy shifts experienced by Rydberg atoms in optical fields are known to be well approximated by the classical quiver energy of a free electron. We examine such energy shifts quantum mechanically and elucidate how they relate to the ponderomotive shift of a free electron in off-resonant fields. We derive and evaluate corrections to the ponderomotive free electron polarizability in the length and velocity (transverse or Coulomb) gauges, which agree exactly as mandated by the gauge invariance. We also show how the free electron value emerges from the Dirac equation through summation over the Dirac sea states. We find that the free-electron AC Stark shift comes as an expectation value of a term proportional to the square of the vector potential in the velocity gauge. On the other hand, the same dominant contribution can be obtained to first order via a series expansion of the exact energy shift from the second order perturbation theory in the length gauge. Finally, we numerically examine the validity of the free-electron approximation. The correction to the free-electron value becomes smaller with increasing principal quantum number, and it is well below a per cent for 60s states of Rb and Sr away from the resonances.
title: Competing for Status: Dynamics of Scientific Disciplines in the European Transnational Field
Creators: name: Hoenig, Barbara
Publisher: name: Karl-Franzens-Universität Graz
Year: 2017

description: Serendipities. Journal for the Sociology and History of the Social Sciences; Volume 2017 (2); Issue 1;
  Pages: 90-106; ISSN: 2521-0947
Amplitude-dependent modal coefficients accounting for localized nonlinear losses in a time-domain integration of woodwind model
Creators: name: Szwarcberg, Nathan
name: Colinot, Tom
name: Vergez, Christophe
name: Jousserand, Michaël
Publisher: name: arXiv
Year: 2023
Subjects: subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences

description: This article develops the design of a sound synthesis model of a woodwind instrument by modal decomposition of the input impedance, taking into account viscothermal losses as well as localized nonlinear losses at the end of the resonator. This formalism has already been applied by Diab et al. (2022) to the study of forced systems. It is now implemented for self-oscillating systems. The employed method extends the denition of the input impedance to the nonlinear domain by adding a dependance on the RMS acoustic velocity at a geometric discontinuity. The poles and residuals resulting from the modal decomposition are interpolated as a function of this velocity. Thus, the pressure-ow relation dened by the resonator is completed by new equations which account for the dependence with the velocity at the end of the tube. To assess the ability of the model to reproduce a real phenomenon, comparisons with the experimental results of Atig et al. (2004) and Dalmont et al. (2007) were carried out. Simulations show that the model reproduces these experimental results qualitatively and quantitatively.
Interpreting canonical tensor model in minisuperspace
Creators: name: Sasakura, Naoki
name: Sato, Yuki
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Canonical tensor model is a theory of dynamical fuzzy spaces in arbitrary space-time dimensions. Examining its simplest case, we find a connection to a minisuperspace model of general relativity in arbitrary dimensions. This is a first step in interpreting variables in canonical tensor model based on the known language of general relativity.
description: 9 pages
Towards realistic artificial benchmark for community detection algorithms evaluation
Creators: name: Orman, Günce Keziban
name: Labatut, Vincent
name: Cherifi, Hocine
Publisher: name: arXiv
Year: 2013
Subjects: subject: Social and Information Networks (cs.SI)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: Assessing the partitioning performance of community detection algorithms is one of the most important issues in complex network analysis. Artificially generated networks are often used as benchmarks for this purpose. However, previous studies showed their level of realism have a significant effect on the algorithms performance. In this study, we adopt a thorough experimental approach to tackle this problem and investigate this effect. To assess the level of realism, we use consensual network topological properties. Based on the LFR method, the most realistic generative method to date, we propose two alternative random models to replace the Configuration Model originally used in this algorithm, in order to increase its realism. Experimental results show both modifications allow generating collections of community-structured artificial networks whose topological properties are closer to those encountered in real-world networks. Moreover, the results obtained with eleven popular community identification algorithms on these benchmarks show their performance decrease on more realistic networks.
A Study of Pulsation properties of 57 Non-Blazhko effect ab-type RR Lyrae stars with homogeneous metallicities from the LAMOST-Kepler/K2 survey
Creators: name: Zong, Peng
name: Fu, Jian-Ning
name: Wang, Jiaxin
name: Cang, Tian-Qi
name: Wang, HaoTian
name: Ma, Xiao-Yu
name: Zong, Weikai
Publisher: name: arXiv
Year: 2023
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Homogeneous metallicities and continuous high-precision light curves play key roles in studying the pulsation properties of RR Lyrae stars. By cross-matching with LAMOST DR6, we have determined 7 and 50 Non-Blazhko RRab stars in the Kepler and K2 fields, respectively, who have homogeneous metallicities determined from low-resolution spectra of the LAMOST-Kepler/K2 project. The Fourier Decomposition method is applied to the light curves of these stars provided by the Kepler space based telescope to determine the fundamental pulsation periods and the pulsation parameters. The calculated amplitude ratios of R21, R31 and the phase differences of ϕ21, ϕ31 are consistent with the parameters of the RRab stars in both the Globular Clusters and the Large Magellanic Cloud. We find a linear relationship between the phase differences ϕ21 and ϕ31, which is in good agreement with the results in previous literature. As far as the amplitude, we find that the amplitude of primary frequency A1 and the total amplitude Atot follow either a cubic or linear relationship. For the rise time RT, we do not find its relevance with the period of the fundamental pulsation mode P1, or Atot and ϕ21. However, it might follow a linear relationship with R31. Based on the homogeneous metallicities, we have derived a new calibration formula for the relationship of period-ϕ31-[Fe/H], which agrees well with the previous studies.
Flux saturation length of sediment transport
Creators: name: Pähtz, Thomas
name: Kok, Jasper F.
name: Parteli, Eric J. R.
name: Herrmann, Hans J.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: Geophysics (physics.geo-ph)
subject: FOS: Physical sciences

description: Sediment transport along the surface drives geophysical phenomena as diverse as wind erosion and dune formation. The main length-scale controlling the dynamics of sediment erosion and deposition is the saturation length $L_\mathrm{s}$, which characterizes the flux response to a change in transport conditions. Here we derive, for the first time, an expression predicting $L_\mathrm{s}$ as a function of the average sediment velocity under different physical environments. Our expression accounts for both the characteristics of sediment entrainment and the saturation of particle and fluid velocities, and has only two physical parameters which can be estimated directly from independent experiments. We show that our expression is consistent with measurements of $L_\mathrm{s}$ in both aeolian and subaqueous transport regimes over at least five orders of magnitude in the ratio of fluid and particle density, including on Mars.
description: 5 pages, 3 figures
Table S1 and S2 from Polyphenol profile of buckwheat honey, nectar and pollen
Creators: name: Nešović, Milica
name: Uroš Gašić
name: Tosti, Tomislav
name: Horvacki, Nikola
name: Šikoparija, Branko
name: Nebojša Nedić
name: Blagojević, Stevan
name: Ljubiša Ignjatović
name: Tešić, Živoslav
Publisher: name: The Royal Society
Year: 2020
Subjects: subject: 30199 Analytical Chemistry not elsewhere classified
subject: FOS: Chemical sciences

description: Table S1: Melissopalynological analysis of presence nectraiferous and nectarless species in Serbian (H1-H4) and Polish honey samples (H5, H6).; Table S2: Content of 31 phenolic compounds (mg/kg), TPC (mg GAE/kg) and RSA (%) in buckwheat honey samples from Serbia (H1-H4) and Poland (H5, H6).
Comments on "Numerical study of the SWKB condition of novel classes of exactly solvable systems''
Creators: name: Bougie, Jonathan
name: Gangopadhyaya, Asim
name: Rasinariu, Constantin
Publisher: name: arXiv
Year: 2023
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We comment on the paper ``Numerical study of the SWKB condition of novel classes of exactly solvable systems'' [Y. Nasuda and N. Sawado, Mod. Phys. Lett. A 36, 2150025 (2021)]. We show that it misrepresents our prior work [J. Bougie, A. Gangopadhyaya and C. Rasinariu, J. Phys. A: Math. Theor. 51, 375202 (2018)], and clarify this misunderstanding.
description: Accepted for publication in Modern Physics Letters A
Figure S1 from Polyphenol profile of buckwheat honey, nectar and pollen
Creators: name: Nešović, Milica
name: Uroš Gašić
name: Tosti, Tomislav
name: Horvacki, Nikola
name: Šikoparija, Branko
name: Nebojša Nedić
name: Blagojević, Stevan
name: Ljubiša Ignjatović
name: Tešić, Živoslav
Publisher: name: The Royal Society
Year: 2020
Subjects: subject: 30199 Analytical Chemistry not elsewhere classified
subject: FOS: Chemical sciences

description: Micrographs of pollen types contributing pollen spectrum with >15%.
Transient Thermal and Electrical Characteristics of a Cylindrical LiFeS2 Cell with Equivalent Circuit Model
Creators: name: Alsharif, Khaled I
name: Pesch, Alexander H
name: Borra, Vamsi
name: Cortes, Pedro
name: MacDonald, Eric
name: Li, Frank X
name: Choo, Kyosung
Publisher: name: arXiv
Year: 2023
Subjects: subject: Systems and Control (eess.SY)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Physical sciences

description: This study examines the discharge behaviour of a cylindrical LiFeS2 cell to evaluate the parameters that can be used to predict and estimate the nonlinear dynamic response of a battery. A linear model is developed to simulate the discharge behaviour and examine the thermal behaviour. In particular, a commercial-grade battery is discharged with the industry-standard hybrid power pulsing characterization (HPPC) test and the current and voltage responses are recorded. The dynamic system is modelled with the equivalent circuit model (ECM) through MATLAB Simulink. A block diagram representation of the equivalent circuit model governing equations was developed. The parameter estimation tool was utilized to reduce the error and fit the simulation results to the experimental voltage responses, in order to obtain state of charge dependent dynamic parameters. Those parameters were then used in a Dual-Potential Multi-Scale Multi-Domain (MSMD) Battery Model solved in ANSYS Fluent to analyze the thermal behaviour by acquiring the temperature profiles and the temperature distribution within the cell. The nonlinear behaviour of the battery was characterized and the equivalent circuit model parameters were identified and are shown to agree with the experimental voltage responses. Furthermore, it is found that the battery temperature increased by 7.35 deg and was distributed uniformly within the cell.
description: conference
Dale's Principle is necessary for an optimal neuronal network's dynamics
Creators: name: Catsigeras, Eleonora
Publisher: name: arXiv
Year: 2013
Subjects: subject: Biological Physics (physics.bio-ph)
subject: Neurons and Cognition (q-bio.NC)
subject: FOS: Physical sciences
subject: FOS: Biological sciences
subject: 92B20, 37N25, 34A37, 05C22, 05C79

description: We study a mathematical model of biological neuronal networks composed by any finite number $N \geq 2$ of non necessarily identical cells. The model is a deterministic dynamical system governed by finite-dimensional impulsive differential equations. The statical structure of the network is described by a directed and weighted graph whose nodes are certain subsets of neurons, and whose edges are the groups of synaptical connections among those subsets. First, we prove that among all the possible networks such that their respective graphs are mutually isomorphic, there exists a dynamical optimum. This optimal network exhibits the richest dynamics: namely, it is capable to show the most diverse set of responses (i.e. orbits in the future) under external stimulus or signals. Second, we prove that all the neurons of a dynamically optimal neuronal network necessarily satisfy Dale's Principle, i.e. each neuron must be either excitatory or inhibitory, but not mixed. So, Dale's Principle is a mathematical necessary consequence of a theoretic optimization process of the dynamics of the network. Finally, we prove that Dale's Principle is not sufficient for the dynamical optimization of the network.
description: 25 pages, 5 figures. The final revised version of this preprint will appear in Applied Mathematics (Irvine), ISSN 2152-7385, Special Issue on Biomathematics at http://www.scirp.org/journal/am/
De-Virtualizing Social Events: Understanding the Gap between Online and Offline Participation for Event Invitations
Creators: name: Huang, Ai-Ju
name: Wang, Hao-Chuan
name: Yuan, Chien Wen
Publisher: name: arXiv
Year: 2013
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: Computers and Society (cs.CY)
subject: FOS: Computer and information sciences
subject: H.5.3; H.5.m

description: One growing use of computer-based communication media is for gathering people to initiate or sustain social events. Although the use of computer-mediated communication and social network sites such as Facebook for event promotion is becoming popular, online participation in an event does not always translate to offline attendance. In this paper, we report on an interview study of 31 participants that examines how people handle online event invitations and what influences their online and offline participation. The results show that people's event participation is shaped by their social perceptions of the event's nature (e.g., public or private), their relationships to others (e.g., the strength of their connections to other invitees), and the medium used to communicate event information (e.g., targeted invitation via email or spam communication via Facebook event page). By exploring how people decide whether to participate online or offline, the results illuminate the sophisticated nature of the mechanisms that affect participation and have design implications that can bridge virtual and real attendance.
description: Proc. 17th ACM Conference on Computer Supported Cooperative Work and Social Computing (CSCW), 2014
MR Elastography with Optimization-Based Phase Unwrapping and Traveling Wave Expansion-based Neural Network (TWENN)
Creators: name: Ma, Shengyuan
name: Wang, Runke
name: Qiu, Suhao
name: Li, Ruokun
name: Yue, Qi
name: Sun, Qingfang
name: Chen, Liang
name: Yan, Fuhua
name: Yang, Guang-Zhong
name: Feng, Yuan
Publisher: name: arXiv
Year: 2023
Subjects: subject: Image and Video Processing (eess.IV)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Magnetic Resonance Elastography (MRE) can characterize biomechanical properties of soft tissue for disease diagnosis and treatment planning. However, complicated wavefields acquired from MRE coupled with noise pose challenges for accurate displacement extraction and modulus estimation. Here we propose a pipeline for processing MRE images using optimization-based displacement extraction and Traveling Wave Expansion-based Neural Network (TWENN) modulus estimation. Phase unwrapping and displacement extraction were achieved by optimization of an objective function with Dual Data Consistency (Dual-DC). A complex-valued neural network using displacement covariance as input has been constructed for the estimation of complex wavenumbers. A model of traveling wave expansion is used to generate training datasets with different levels of noise for the network. The complex shear modulus map is obtained by a fusion of multifrequency and multidirectional data. Validation using images of brain and liver simulation demonstrates the practical value of the proposed pipeline, which can estimate the biomechanical properties with minimum root-mean-square-errors compared with state-of-the-art methods. Applications of the proposed method for processing MRE images of phantom, brain, and liver show clear anatomical features and that the pipeline is robust to noise and has a good generalization capability.
Gradient estimates for a nonlinear parabolic equation on smooth metric measure spaces with evolving metrics and potentials
Creators: name: Taheri, Ali
name: Vahidifar, Vahideh
Publisher: name: arXiv
Year: 2023
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: This article presents new parabolic and elliptic type gradient estimates for positive smooth solutions to a nonlinear parabolic equation involving the Witten Laplacian in the context of smooth metric measure spaces. The metric and potential here are time dependent and evolve under a super Perelman-Ricci flow. The estimates are derived under natural lower bounds on the associated generalised Bakry-Émery Ricci curvature tensors and are utilised in establishing fairly general local and global bounds, Harnack-type inequalities and Liouville-type global constancy theorems to mention a few. Other implications and consequences of the results are also discussed.
description: 41 pages