cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Dynamic Simulation, Flight Control and Guidance Synthesis for Fixed-Wing UAV Swarms
Creators: name:  CARLO E.D. RIBOLDI
name:   MARCO TOMASONI
Publisher: name: Proceedings of the Aerospace Europe Conference - EUCASS - CEAS - 2023
Year: 2023
Subjects: SWARM
UAV
FORMATION FLIGHT
COORDINATION
LEADER-FOLLOWER
NONLINEAR SIMULATION
STABILITY AUGMENTATION
GUIDANCE
BEAM TRACKING
ALTITUDE TRACKING
FIXED-WING UAV
DRONE

description: Autonomous unmanned flight based on fixed-wing aircraft constitutes a practical and economical solution for transport missions to remote destinations or disadvantaged communities, for which payload and range represent interesting figures of merit. In those scenarios, the employment of UAV swarms appears as a promising way to pursue a scale effect on payload. Considering the military market, the deployment of swarms of smaller aircraft may enable logistic modularity, mitigating the risk of losing the entire mission cargo or war-load by flying over hostile areas. This paper is concerned with several aspects of fixed-wing UAV swarm flight: 6-DOF flight dynamics modeling, aircraft stabilization, path tracking for autonomous guidance, intra-swarm formation control, overall performance assessment and disturbance rejection are topics touched in the work. The methodologies and study-cases herein illustrate the design and coordination of a swarm, obtained through reliable control techniques, and demonstrated within a complete non-linear simulation environment.
Blondel, M.: La Pérennité de la Philosophie et le Discernement progressif d´une constante et indispensable Médiation: Rev MétMor 47 (1940) 349-363
Creators: name: Nink, Caspar
Publisher: name: Scholastik
Year: 1970

description: Scholastik, Bd. 18 Nr. 1 (1943): Scholastik. Vierteljahresschrift für Theologie und Philosophie, Band 18, Heft 1
Search for top squark pair production in a final state with at least one hadronically decaying tau lepton in proton-proton collisions at $\sqrt{s}$ = 13 TeV
Creators: name: CMS Collaboration
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: A search for pair production of the supersymmetric partner of the top quark, the top squark, in proton-proton collisions at $\sqrt{s}$ = 13 TeV is presented in final states containing at least one hadronically decaying tau lepton and large missing transverse momentum. This final state is highly sensitive to scenarios of supersymmetry in which the decay of the top squark to tau leptons is enhanced. The search uses a data sample corresponding to an integrated luminosity of 138 fb$^{-1}$, which was recorded with the CMS detector during 2016-2018. No significant excess is observed with respect to the standard model predictions. Exclusion limits at 95% confidence level on the masses of the top squark and the lightest neutralino are presented under the assumptions of simplified models. The results probe top squark masses up to 1150 GeV for a nearly massless neutralino. This search covers a relatively less explored parameter space in the context of supersymmetry, and the exclusion limit is the most stringent to date for the model considered here.
description: Replaced with the published version. Added the journal reference and the DOI. All the figures and tables can be found at http://cms-results.web.cern.ch/cms-results/public-results/publications/SUS-21-004 (CMS Public Pages)
Toccafondi, E.T.: La ricerca critica della realtà
Creators: name: Vries, J. De
Publisher: name: Scholastik
Year: 1970

description: Scholastik, Bd. 18 Nr. 1 (1943): Scholastik. Vierteljahresschrift für Theologie und Philosophie, Band 18, Heft 1
Applicability of dynamic facilitation theory to binary hard disk systems
Creators: name: Isobe, Masaharu
name: Keys, Aaron S.
name: Chandler, David
name: Garrahan, Juan P.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We investigate numerically the applicability of dynamic facilitation (DF) theory for glass-forming binary hard disk systems where supercompression is controlled by pressure. By using novel efficient algorithms for hard disks, we are able to generate equilibrium supercompressed states in an additive non-equimolar binary mixture, where micro-crystallization and size segregation do not emerge at high average packing fractions. Above an onset pressure where collective heterogeneous relaxation sets in, we find that relaxation times are well described by a "parabolic law" with pressure. We identify excitations, or soft-spots, that give rise to structural relaxation, and find that they are spatially localized, their average concentration decays exponentially with pressure, and their associated energy scale is logarithmic in the excitation size. These observations are consistent with the predictions of DF generalized to systems controlled by pressure rather than temperature.
description: 6 pages, 3 figures, to appear in Phys. Rev. Lett
Satellite-Assisted Multi-Connectivity in Beyond 5G
Creators: name: Majamaa, Mikko
name: Martikainen, Henrik
name: Puttonen, Jani
name: Hämäläinen, Timo
Publisher: name: arXiv
Year: 2023
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: Due to the ongoing standardization and deployment activities, satellite networks will be supplementing the 5G and beyond Terrestrial Networks (TNs). For the satellite communications involved to be as efficient as possible, techniques to achieve that should be used. Multi-Connectivity (MC), in which a user can be connected to multiple Next Generation Node Bs simultaneously, is one such technique. However, the technique is not well-researched in the satellite environment. In this paper, an algorithm to activate MC for users in the weakest radio conditions is introduced. The algorithm operates dynamically, considering deactivation of MC to prioritize users in weaker conditions when necessary. The algorithm is evaluated with a packet-level 5G non-terrestrial network system simulator in a scenario that consists of a TN and transparent payload low earth orbit satellite. The algorithm outperforms the benchmark algorithms. The usage of MC with the algorithm increases the mean throughput of the users by 20.3% and the 5th percentile throughput by 83.5% compared to when MC is turned off.
description: Accepted to be published in: 24th IEEE International Symposium on a World of Wireless, Mobile and Multimedia Networks (WoWMoM), June 12-15 2023, Boston, Massachusetts
Meßner, R.: Schauendes und begriffliches Erkennen nach Duns Skotus mit kritischer Gegenüberstellung zur Erkenntnislehre von Kant und Aristoteles
Creators: name: Nink, Caspar
Publisher: name: Scholastik
Year: 1970

description: Scholastik, Bd. 18 Nr. 1 (1943): Scholastik. Vierteljahresschrift für Theologie und Philosophie, Band 18, Heft 1
Coordinated Dynamic Spectrum Sharing Between Terrestrial and Non-Terrestrial Networks in 5G and Beyond
Creators: name: Martikainen, Henrik
name: Majamaa, Mikko
name: Puttonen, Jani
Publisher: name: arXiv
Year: 2023
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: The emerging Non-Terrestrial Networks (NTNs) can aid to provide 5G and beyond services everywhere and anytime. However, the vast emergence of NTN systems will introduce an unseen interference to both the existing satellite systems and Terrestrial Networks (TNs). For that, there is a need for novel ideas on how to efficiently utilize the co-existing systems with the ever-increasing competition on scarce spectrum resources. Dynamic Spectrum Sharing (DSS) is a promising technique in which different systems can operate on the same spectrum, thus increasing the spectrum efficiency and offering better coverage for the users. In this paper, we present a centralized scheme for achieving coordinated DSS to protect the primary TN while providing NTN with sufficient resources. The scheme is evaluated by system simulations in a scenario with a TN and low earth orbit satellite. The results reveal that in a low traffic demand situation, the primary TN users are not affected negatively while the NTN can provide service to the rural area. In high-demand traffic situations, the peak performance of the TN inevitably suffers but the TN cell edge and NTN users' performance is improved.
description: 2023 IEEE 24th International Symposium on a World of Wireless, Mobile and Multimedia Networks (WoWMoM)
Grabmann, M.: I divieti ecclesiastici di Aristotele sotto Innocenzo III e Gregorio IX
Creators: name: Pelster, Fr.
Publisher: name: Scholastik
Year: 1970

description: Scholastik, Bd. 18 Nr. 1 (1943): Scholastik. Vierteljahresschrift für Theologie und Philosophie, Band 18, Heft 1
Kuramoto model with uniformly spaced frequencies:Finite-N asymptotics of the locking threshold
Creators: name: Ottino-Loffler, Bertrand
name: Strogatz, Steven
Publisher: name: arXiv
Year: 2015
Subjects: subject: Dynamical Systems (math.DS)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 37F99

description: We study phase locking in the Kuramoto model of coupled oscillators in the special case where the number of oscillators, $N$, is large but finite, and the oscillators' natural frequencies are evenly spaced on a given interval. In this case, stable phase-locked solutions are known to exist if and only if the frequency interval is narrower than a certain critical width, called the locking threshold. For infinite $N$, the exact value of the locking threshold was calculated 30 years ago; however, the leading corrections to it for finite $N$ have remained unsolved analytically. Here we derive an asymptotic formula for the locking threshold when $N \gg 1$. The leading correction to the infinite-$N$ result scales like either $N^{-3/2}$ or $N^{-1}$, depending on whether the frequencies are evenly spaced according to a midpoint rule or an endpoint rule. These scaling laws agree with numerical results obtained by Pazó [Phys. Rev. E 72, 046211 (2005)]. Moreover, our analysis yields the exact prefactors in the scaling laws, which also match the numerics.
description: 8 pages, 3 figures
Characterization of maximum hands-off control
Creators: name: Chatterjee, Debasish
name: Nagahara, Masaaki
name: Quevedo, Daniel
name: Rao, K. S. Mallikarjuna
Publisher: name: arXiv
Year: 2016
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: Maximum hands-off control aims to maximize the length of time over which zero actuator values are applied to a system when executing specified control tasks. To tackle such problems, recent literature has investigated optimal control problems which penalize the size of the support of the control function and thereby lead to desired sparsity properties. This article gives the exact set of necessary conditions for a maximum hands-off optimal control problem using an $L_0$-(semi)norm, and also provides sufficient conditions for the optimality of such controls. Numerical example illustrates that adopting an $L_0$ cost leads to a sparse control, whereas an $L_1$-relaxation in singular problems leads to a non-sparse solution.
description: 6 pages
Gravitational wave background from Population III binary black holes consistent with cosmic reionization
Creators: name: Inayoshi, Kohei
name: Kashiyama, Kazumi
name: Visbal, Eli
name: Haiman, Zoltan
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The recent discovery of the gravitational wave source GW150914 has revealed a coalescing binary black hole (BBH) with masses of $\sim 30~M_\odot$. Previous proposals for the origin of such a massive binary include Population III (PopIII) stars. PopIII stars are efficient producers of BBHs and of a gravitational wave background (GWB) in the $10-100$ Hz band, and also of ionizing radiation in the early Universe. We quantify the relation between the amplitude of the GWB ($Ω_{\rm gw}$) and the electron scattering optical depth ($τ_{\rm e}$), produced by PopIII stars, assuming that $f_{\rm esc}\approx 10\%$ of their ionizing radiation escapes into the intergalactic medium. We find that PopIII stars would produce a GWB that is detectable by the future O5 LIGO/Virgo if $τ_{\rm e} \gtrsim 0.07$, consistent with the recent Planck measurement of $τ_e=0.055 \pm 0.09$. Moreover, the spectral index of the background from PopIII BBHs becomes as small as ${\rm d}\ln Ω_{\rm gw}/{\rm d}\ln f\lesssim 0.3$ at $f \gtrsim 30$ Hz, which is significantly flatter than the value $\sim 2/3$ generically produced by lower-redshift and less-massive BBHs. A detection of the unique flattening at such low frequencies by the O5 LIGO/Virgo will indicate the existence of a high-chirp mass, high-redshift BBH population, which is consistent with the PopIII origin. A precise characterization of the spectral shape near $30-50$ Hz by the Einstein Telescope could also constrain the PopIII initial mass function and star formation rate.
description: 6 pages, 5 figures, accepted for publication in MNRAS, discussions and a figure added
Der Trinitätstraktat Walters von Mortagne als Quelle der Summa sententiarum
Creators: name: Ott, Ludwig
Publisher: name: Scholastik
Year: 1970

description: Scholastik, Bd. 18 Nr. 1 (1943): Scholastik. Vierteljahresschrift für Theologie und Philosophie, Band 18, Heft 1
From Modular to Distributed Open Architectures: A Unified Decision Framework
Creators: name: Heydari, Babak
name: Mosleh, Mohsen
name: Dalili, Kia
Publisher: name: arXiv
Year: 2016
Subjects: subject: Systems and Control (eess.SY)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: This paper introduces a conceptual, yet quantifiable, architecture framework by extending the notion of system modularity in its broadest sense. Acknowledging that modularity is not a binary feature and comes in various types and levels, the proposed framework introduces higher levels of modularity that naturally incorporate decentralized architecture on the one hand and autonomy in agents and subsystems on the other. This makes the framework suitable for modularity decisions in Systems of Systems and for analyzing the impact of modularity on broader surrounding ecosystems. The stages of modularity in the proposed framework are naturally aligned with the level of variations and uncertainty in the system and its environment, a relationship that is central to the benefits of modularity. The conceptual framework is complemented with a decision layer that makes it suitable to be used as a computational architecture decision tool to determine the appropriate stage and level of modularity of a system, for a given profile of variations and uncertainties in its environment. We further argue that the fundamental systemic driving forces and trade-offs of moving from monolithic to distributed architecture are essentially similar to those for moving from integral to modular architectures. The spectrum, in conjunction with the decision layer, could guide system architects when selecting appropriate parameters and building a system-specific computational tool from a combination of existing tools and techniques. To demonstrate the applicability of the framework, a case for fractionated satellite systems based on a simplified demo of the DARPA F6 program is presented.
description: 22 pages
Analytical determination of orbital elements using Fourier analysis. I. The radial velocity case
Creators: name: Delisle, J. -B.
name: Ségransan, D.
name: Buchschacher, N.
name: Alesina, F.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We describe an analytical method for computing the orbital parameters of a planet from the periodogram of a radial velocity signal. The method is very efficient and provides a good approximation of the orbital parameters. The accuracy is mainly limited by the accuracy of the computation of the Fourier decomposition of the signal which is sensitive to sampling and noise. Our method is complementary with more accurate (and more expensive in computer time) numerical algorithms (e.g. Levenberg-Marquardt, Markov chain Monte Carlo, genetic algorithms). Indeed, the analytical approximation can be used as an initial condition to accelerate the convergence of these numerical methods. Our method can be applied iteratively to search for multiple planets in the same system.
description: accepted to A&A
The outer profile of dark matter halos: an analytical approach
Creators: name: Shi, Xun
Publisher: name: arXiv
Year: 2016
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: A steepening feature in the outer density profiles of dark matter halos indicating the splashback radius has drawn much attention recently. Possible observational detections have even been made for galaxy clusters. Theoretically, Adhikari et al. have estimated the location of the splashback radius by computing the secondary infall trajectory of a dark matter shell through a growing dark matter halo with an NFW profile. However, since they imposed a shape of the halo profile rather than computing it consistently from the trajectories of the dark matter shells, they could not provide the full shape of the dark matter profile around the splashback radius. We improve on this by extending the self-similar spherical collapse model of Fillmore \& Goldreich to a $Λ$CDM universe. This allows us to compute the dark matter halo profile and the trajectories simultaneously from the mass accretion history. Our results on the splashback location agree qualitatively with Adhikari et al. but with small quantitative differences at large mass accretion rates. We present new fitting formulae for the splashback radius $R_{\rm sp}$ in various forms, including the ratios of $R_{\rm sp} / R_{\rm 200c}$ and $R_{\rm sp} / R_{\rm 200m}$. Numerical simulations have made the puzzling discovery that the splashback radius scales well with $R_{\rm 200m}$ but not with $R_{\rm 200c}$. We trace the origin of this to be the correlated increase of $Ω_{\rm m}$ and the average halo mass accretion rate with an increasing redshift.
description: 10 pages, 10 figures, published in MNRAS
Fluctuation-dissipation relations far from equilibrium
Creators: name: Altaner, Bernhard
name: Polettini, Matteo
name: Esposito, Massimiliano
Publisher: name: arXiv
Year: 2016
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Near equilibrium, where all currents of a system vanish on average, the fluctuation-dissipation relation (FDR) connects a current's spontaneous fluctuations with its response to perturbations of the conjugate thermodynamic force. Out of equilibrium, fluctuation-response relations generally involve additional nondissipative contributions. Here, in the framework of stochastic thermodynamics, we show that an equilibrium-like FDR holds for internally equilibrated currents, if the perturbing conjugate force only affects the microscopic transitions that contribute to the current. We discuss the physical requirements for the validity of our result and apply it to nano-sized electronic devices.
description: In this revised version of our manuscript, we generalized our result and improved the presentation in order to emphasize its physical significance. The mathematical details of the proof of our main results have been moved to a supplementary material. Keywords: nonequilibrium & irreversible thermodynamics; fluctuation-dissipation theorems
Mott physics and collective modes: an atomic approximation of the four-particle irreducible functional
Creators: name: Ayral, Thomas
name: Parcollet, Olivier
Publisher: name: arXiv
Year: 2016
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We discuss a generalization of the dynamical mean field theory (DMFT) for strongly correlated systems close to a Mott transition based on a systematic approximation of the fully irreducible four-point vertex. It is an atomic-limit approximation of a functional of the one- and two-particle Green functions, built with the second Legendre transform of the free energy with respect to the two-particle Green function. This functional is represented diagrammatically by four-particle irreducible (4PI) diagrams. Like the dynamical vertex approximation (D$Γ$A), the fully irreducible vertex is computed from a quantum impurity model whose bath is self-consistently determined by solving the parquet equations. However, in contrast with D$Γ$A and DMFT, the interaction term of the impurity model is also self-consistently determined. The method interpolates between the parquet approximation at weak coupling and the atomic limit, where it is exact. It is applicable to systems with short-range and long-range interactions.
description: 14 pages, 6 figures
Globular clusters in the central region of the Milky Way galaxy I. Bar influence on the orbit parameters according to Gaia EDR3
Creators: name: Bajkova, A. T.
name: Smirnov, A. A.
name: Bobylev, V. V.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The work is devoted to the analysis of the influence of the galactic bar on the orbital motion of globular clusters in the central region of the Galaxy. For this task, 45 globular clusters were selected, 34 of which belong to the bulge/bar and 11 to the disk. The most accurate astrometric data from the Gaia satellite (Vasiliev and Baumgardt, 2021), as well as new refined average distances (Baumgardt and Vasiliev, 2021), were used to form the 6D-phase space required for orbit integration. The orbits of globular clusters are obtained both in an axisymmetric potential and in a potential including a bar. In this case, the mass, rotation velocity, shape and scale length of the bar were varied. A comparison is made of such orbital parameters as apocentric and pericentric distances, eccentricity and maximum distance from the galactic plane. It is shown that the mass of the bar exerts the greatest influence on the orbital motion, which is expressed mainly in an increase in both the apocentric and pericentric distances in the vast majority of globular clusters. The eccentricities of the orbits in the overwhelming majority also change significantly, and there is a change both upward and downward, especially in the range of values from 0.2 to 0.8. The greatest changes in parameters are observed in globular clusters with high radial velocities and small pericentric distances. The change in orbital parameters depending on the bar rotation velocity is less pronounced. The influence of the geometric parameters of the bar is insignificant in the accepted range of their changes. Several examples show that globular clusters in the bulge are more affected by the bar than those belonging to the disk.
description: 29 pages, 10 figures, 6 tables
Indestructible dynamics of torus maps
Creators: name: Das, Suddhasattwa
name: Yorke, James
Publisher: name: arXiv
Year: 2015
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 37B05, 37C15

description: Given a $d$-dimensional torus map $F(z)=Mz+G(z)\bmod 1$, where $M$ is an integer-matrix and and $G$ is a periodic function, we find conditions on $M$ under which $F$ is semi-conjugate to a linear torus map, independently of $G$. We also find a conditions $G$ under which these semi-conjugacies can be turned into conjugacies. These conditions are satisfied by open sets of torus maps (in the $C^1$-topology) and therefore describe some asymptotic behavior of trajectories which are stable under perturbations to the map.
Revisiting XOR-based Network Coding for Energy Efficient Broadcasting in Mobile Ad Hoc Networks
Creators: name: Papanikos, Nikolaos
name: Papapetrou, Evangelos
Publisher: name: arXiv
Year: 2016
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: Network coding is commonly used to improve the energy efficiency of network-wide broadcasting in wireless multi-hop networks. In this work, we focus on XOR-based broadcasting in mobile ad hoc networks with multiple sources. We make the observation that the common approach, which is to benefit from the synergy of XOR network coding with a CDS-based broadcast algorithm, suffers performance breakdowns. After delving into the details of this synergy, we attribute this behavior to an important mechanism of the underlying broadcast algorithm, known as the "termination criterion". To tackle the problem, we propose a termination criterion that is fully compatible with XOR coding. In addition to that, we revisit the internals of XOR coding. We first enhance the synergy of XOR coding with the underlying broadcast algorithm by allowing each mechanism to benefit from information available by the other. In this way, we manage to improve the pruning efficiency of the CDS-based algorithm while at the same time we come up with a method for detecting coding opportunities that has minimal storage and processing requirements compared to current approaches. Then, for the first time, we use XOR coding as a mechanism not only for enhancing energy efficiency but also for reducing the end-to-end-delay. We validate the effectiveness of our proposed algorithm through extensive simulations on a diverse set of scenarios.
description: 17 pages, 21 figures, 4 tables; changed presentation style of termination criteria and enriched discussion on CDS-based broadcasting (Section 2.1); expanded discussion on the gains of lightweight coding approach (Section 5.2); added new experiments that evaluate lightweight coding (Section 6); added an overview (and related references) of traditional broadcast schemes (section 7.1);corrected typos
Festschrift Eduard Eichmann zum 70. Geburtstag
Creators: name: Zeiger, I.A.
Publisher: name: Scholastik
Year: 1970

description: Scholastik, Bd. 17 Nr. 4 (1942): Scholastik. Vierteljahresschrift für Theologie und Philosophie, Band 17, Heft 4
Borchert, E.: Der Einfluß des Nominalismus auf die Christologie der Spätscholastik
Creators: name: Pelster, Franz
Publisher: name: Scholastik
Year: 1970

description: Scholastik, Bd. 17 Nr. 4 (1942): Scholastik. Vierteljahresschrift für Theologie und Philosophie, Band 17, Heft 4
Zumkeller, A.: Hugolin von Orvieto und seine theologische Erkenntnislehre
Creators: name: Pelster, Franz
Publisher: name: Scholastik
Year: 1970

description: Scholastik, Bd. 17 Nr. 4 (1942): Scholastik. Vierteljahresschrift für Theologie und Philosophie, Band 17, Heft 4
Scholz, Fr.: Die Lehre von der Einsetzung der Sakramente nach Alexander von Hales
Creators: name: Weisweiler, Heinrich
Publisher: name: Scholastik
Year: 1970

description: Scholastik, Bd. 17 Nr. 4 (1942): Scholastik. Vierteljahresschrift für Theologie und Philosophie, Band 17, Heft 4
A general mass term for bigravity
Creators: name: Cusin, Giulia
name: Durrer, Ruth
name: Guarato, Pietro
name: Motta, Mariele
Publisher: name: arXiv
Year: 2015
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We introduce a new formalism to study perturbations of Hassan-Rosen bigravity theory, around general backgrounds for the two dynamical metrics. In particular, we derive the general expression for the mass term of the perturbations and we explicitly compute it for cosmological settings. We study tensor perturbations in a specific branch of bigravity using this formalism. We show that the tensor sector is affected by a late-time instability, which sets in when the mass matrix is no longer positive definite.
description: 27 pages, 24 figures; v3: version accepted for publication in JCAP
Finite-size scaling analysis of localization transition for scalar waves in a 3D ensemble of resonant point scatterers
Creators: name: Skipetrov, S. E.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We use the random Green's matrix model to study the scaling properties of the localization transition for scalar waves in a three-dimensional (3D) ensemble of resonant point scatterers. We show that the probability density $p(g)$ of normalized decay rates of quasi-modes $g$ is very broad at the transition and in the localized regime and that it does not obey a single-parameter scaling law for finite system sizes that we can access. The single-parameter scaling law holds, however, for the small-$g$ part of $p(g)$ which we exploit to estimate the critical exponent $ν$ of the localization transition. Finite-size scaling analysis of small-$q$ percentiles $g_q$ of $p(g)$ yields an estimate $ν\simeq 1.55 \pm 0.07$. This value is consistent with previous results for Anderson transition in the 3D orthogonal universality class and suggests that the localization transition under study belongs to the same class.
description: 11 pages, 10 figures, revised manuscript
White Dwarf Critical Tests for Modified Gravity
Creators: name: Jain, Rajeev Kumar
name: Kouvaris, Chris
name: Nielsen, Niklas Grønlund
Publisher: name: arXiv
Year: 2015
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Scalar-tensor theories of gravity can lead to modifications of the gravitational force inside astrophysical objects. We exhibit that compact stars such as white dwarfs provide a unique set-up to test beyond Horndeski theories of ${\rm G}^3$ type. We obtain stringent and independent constraints on the parameter $Υ$ characterizing the deviations from Newtonian gravity using the mass-radius relation, the Chandrasekhar mass limit and the maximal rotational frequency of white dwarfs. We find that white dwarfs impose stronger constraints on $Υ$ than red and brown dwarfs.
description: V2: 6 pages, 4 figures, minor revisions, to appear in Physical Review Letters
Wael, G.E.M. de: De Mystica van Dionysius Mysticus in de Werken van Dionysius Carthusianus
Creators: name: Pummerer, A.
Publisher: name: Scholastik
Year: 1970

description: Scholastik, Bd. 17 Nr. 4 (1942): Scholastik. Vierteljahresschrift für Theologie und Philosophie, Band 17, Heft 4
Oeming, Manfred / Schmid, Konrad, Hiobs Weg
Creators: name: Wenzel, Heiko
Publisher: name: Jahrbuch für evangelikale Theologie
Year: 2025

description: 1822609968
description: Jahrbuch für evangelikale Theologie, V. 17 (2003): Jahrbuch für evangelikale Theologie, Band 17
Continuous homomorphisms between algebras of iterated Laurent series over a ring
Creators: name: Gorchinskiy, Sergey
name: Osipov, Denis
Publisher: name: arXiv
Year: 2016
Subjects: subject: Rings and Algebras (math.RA)
subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 16-XX

description: We study continuous homomorphisms between algebras of iterated Laurent series over a commutative ring. We give a full description of such homomorphisms in terms of a discrete data determined by the images of parameters. In similar terms, we give a criterion of invertibility of an endomorphism and provide an explicit formula for the inverse endomorphism. We study the behavior of the higher-dimensional residue under continuous homomorphisms.
description: 26 pages; minor changes
Tiltan and superclub
Creators: name: Garti, Shimon
name: Shelah, Saharon
Publisher: name: arXiv
Year: 2023
Subjects: subject: Logic (math.LO)
subject: FOS: Mathematics
subject: 03E02, 03E17

description: We force superclub with an arbitrary large value of cov($\mathscr{M}$). We force tiltan with an arbitrary large value of add($\mathscr{M}$). Finally, we obtain a negative square bracket relation from superclub.
description: We added several things, following an email from Joerg Brendle, whom we thank
Buchner, M.: Die Areopagitica des Abtes Hilduin von St. Denis und ihr kirchenpolitischer Hintergrund
Creators: name: Ueding, L.
Publisher: name: Scholastik
Year: 1970

description: Scholastik, Bd. 17 Nr. 4 (1942): Scholastik. Vierteljahresschrift für Theologie und Philosophie, Band 17, Heft 4
Bräumer, Hansjörg, Das zweite Buch der Chronik
Creators: name: Klaassen, Doyle
Publisher: name: Jahrbuch für evangelikale Theologie
Year: 2025

description: 1822609607
description: Jahrbuch für evangelikale Theologie, V. 17 (2003): Jahrbuch für evangelikale Theologie, Band 17
Comprehensive analysis of the optical Kerr coefficient of graphene
Creators: name: Soh, Daniel B. S.
name: Hamerly, Ryan
name: Mabuchi, Hideo
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We present a comprehensive analysis of the the nonlinear optical Kerr effect in graphene. We directly solve the S-matrix element to calculate the absorption rate, utilizing the Volkov-Keldysh- type crystal wave functions. We then convert to the nonlinear refractive index coefficients through the Kramers-Kronig relation. In this formalism, the source of Kerr nonlinearity is the interplay of optical fields that cooperatively drive the transition from valence to conduction band. This formalism makes it possible to identify and compute the rates of distinct nonlinear processes that contribute to the Kerr nonlinear refractive index coefficient. The four identified mechanisms are two photon absorption, Raman transition, self coupling, and quadratic AC Stark effect. We also present a comparison of our theory with recent experimental and theoretical results.
description: 12 pages, 5 figures
Rotation-tunneling spectrum and astrochemical modeling of dimethylamine, CH$_3$NHCH$_3$, and searches for it in space
Creators: name: Müller, H. S. P.
name: Garrod, R. T.
name: Belloche, A.
name: Rivilla, V. M.
name: Menten, K. M.
name: Jiménez-Serra, I.
name: Martín-Pintado, J.
name: Lewen, F.
name: Schlemmer, S.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Atomic and Molecular Clusters (physics.atm-clus)
subject: FOS: Physical sciences

description: Methylamine has been the only simple alkylamine detected in the interstellar medium for a long time. With the recent secure and tentative detections of vinylamine and ethylamine, respectively, dimethylamine has become a promising target for searches in space. Its rotational spectrum, however, has been known only up to 45 GHz until now. Here we investigate the rotation-tunneling spectrum of dimethylamine in selected regions between 76 and 1091 GHz using three different spectrometers in order to facilitate its detection in space. The quantum number range is extended to $J = 61$ and $K_a = 21$, yielding an extensive set of accurate spectroscopic parameters. To search for dimethylamine, we refer to the spectral line survey ReMoCA carried out with the Atacama Large Millimeter/submillimeter Array toward the high-mass star-forming region Sagittarius B2(N) and a spectral line survey of the molecular cloud G+0.693$-$0.027 employing the IRAM 30 m and Yebes 40 m radio telescopes. We report nondetections of dimethylamine toward the hot molecular cores Sgr B2(N1S) and Sgr B2(N2b) as well as G+0.693$-$0.027 which imply that dimethylamine is at least 14, 4.5 and 39 times less abundant than methylamine toward these sources, respectively. The observational results are compared to computational results from a gas-grain astrochemical model. The modeled methylamine to dimethylamine ratios are compatible with the observational lower limits. However, the model produces too much ethylamine compared with methylamine which could mean that the already fairly low levels of dimethylamine in the models may also be too high.
description: Mon. Not. R. Astron. Soc., accepted. 33 pages including tables, figures, and appendix
The first observations of wide-band interferometers and the spectra of relic gravitons
Creators: name: Giovannini, Massimo
Publisher: name: arXiv
Year: 2016
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Stochastic backgrounds of relic gravitons of cosmological origin extend from frequencies of the order of the aHz up to the GHz range. Since the temperature and polarization anisotropies constrain the low frequency normalization of the spectra, in the concordance paradigm the strain amplitude corresponding to the frequency window of wide-band interferometers turns out to be, approximately, nine orders of magnitude smaller than the astounding signal recently reported and attributed to a binary black hole merger. The backgrounds of relic gravitons expected from the early Universe are compared with the stochastic foregrounds stemming from the estimated multiplicity of the astrophysical sources. It is suggested that while the astrophysical foregrounds are likely to dominate between few Hz and 10 kHz, relic gravitons with frequencies exceeding 100 kHz represent a potentially uncontaminated signal for the next generation of high-frequency detectors currently under scrutiny.
description: 10 pages, 2 figures. Minor additions. To appear in Phys. Lett. B
An Automatic Unlabeled Selection for CO-training REGressors (AU-COREG)
Creators: name: Sirikwan Kheereesuwannakul
Publisher: name: Faculty of Information Science and Technology, Mahanakorn University of Technology
Year: 2020
Subjects: Co-Training
Simi-Supervised Learning

description: Journal of Information Science and Technology, 10, 1, 10-23
Image Processing for Classifying the Quality of the Chok-Anan Mango by Simulating the Human Vision using Deep Learning
Creators: name: Nopparut Pattansarn
Publisher: name: Faculty of Information Science and Technology, Mahanakorn University of Technology
Year: 2020
Subjects: Image Processing
Deep Learning
Chok-Anan Mango
Convolutional Neural-Network

description: Journal of Information Science and Technology, 10, 1, 24-29
Thermal SZ fluctuations in the ICM: probing turbulence and thermodynamics in Coma cluster with ${\it Planck}$
Creators: name: Khatri, Rishi
name: Gaspari, Massimo
Publisher: name: arXiv
Year: 2016
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Fluid Dynamics (physics.flu-dyn)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: We report the detection of thermal Sunyaev-Zeldovich effect (SZ) fluctuations in the intracluster medium (ICM) of Coma cluster observed with ${\it Planck}$. The SZ data links the maximum observable X-ray scale to the large Mpc scale, extending our knowledge of the power spectrum of ICM fluctuations. Deprojecting the 2-d SZ perturbations into 3-d pressure fluctuations, we find an amplitude spectrum which peaks at $δP/P = 33\pm 12\%$ and $74\pm19\%$ in the $15'$ and $40'$ radius region, respectively. We perform tests to ensure fluctuations are intrinsic to the cluster and not due to noise contamination. By using high-resolution hydrodynamical models, we improve the ICM turbulence constraints in Coma, finding 3-d Mach number ${\rm Ma_{3d}}= 0.8\pm0.3$ (15' region), increasing to supersonic values at larger radii (40'), and an injection scale $L_{\rm inj}\approx 500$ kpc. Such properties are consistent with driving due to mergers, in particular tied to internal galaxy groups. The large pressure fluctuations show that Coma is in adiabatic mode (mediated by sound waves), rather than isobaric mode (mediated by buoyancy waves). As predicted by turbulence models, the distribution of SZ fluctuations is log-normal with mild non-Gaussianities (heavy tails). The substantial non-thermal pressure support implies hydrostatic mass bias $b_M=-15\%$ to $-45\%$ from the core to the outskirt region, respectively. While total SZ power probes the thermal energy content, the SZ fluctuations constrain the non-thermal deviations important for precision cosmology. The proposed, novel approach can be exploited by multifrequency observations using ground based interferometers and future space CMB missions.
description: Accepted version
Phenomenological Implications of an SU(5) x S4 x U(1) SUSY GUT of Flavour
Creators: name: Dimou, Maria
name: King, Stephen F.
name: Luhn, Christoph
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We discuss the characteristic low energy phenomenological implications of an SU(5) Supersymmetric Grand Unified Theory (SUSY GUT) whose flavour structure is controlled by the family symmetry S4 x U(1), which provides a good description of all quark and lepton masses, mixings as well as CP violation. Although the model closely mimics Minimal Flavour Violation (MFV) as shown in arXiv:1511.07886, here we focus on the differences. We first present numerical estimates of the low energy mass insertion parameters, including canonical normalisation and renormalisation group running, for well-defined ranges of SUSY parameters and compare the naive model expectations to the numerical scans and the experimental bounds. Our results are then used to estimate the model-specific predictions for Electric Dipole Moments (EDMs), Lepton Flavour Violation (LFV), B and K meson mixing as well as rare B decays. The largest observable deviations from MFV come from the LFV process mu --> e gamma and the electron EDM.
description: 50 pages + appendices, version to be published in PRD
Comparing Efficiency in Copying Video Files through Powerline between NFS and FTP: A Case Study of Developing a Low-cost Smart CCTV System through Raspberry Pi
Creators: name: Cheawchan Yangsila
Publisher: name: Faculty of Information Science and Technology, Mahanakorn University of Technology
Year: 2020
Subjects: Low-cost Smart CCTV
Raspberry Pi
NFS
FTP

description: Journal of Information Science and Technology, 10, 1, 30-38
An adaptive interpolation scheme for molecular potential energy surfaces
Creators: name: Kowalewski, Markus
name: Larsson, Elisabeth
name: Heryudono, Alfa
Publisher: name: arXiv
Year: 2016
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: The calculation of potential energy surfaces for quantum dynamics can be a time consuming task -- especially when a high level of theory for the electronic structure calculation is required. We propose an adaptive interpolation algorithm based on polyharmonic splines combined with a partition of unity approach. The adaptive node refinement allows to greatly reduce the number of sample points by employing a local error estimate. The algorithm and its scaling behavior is evaluated for a model function in 2, 3 and 4 dimensions. The developed algorithm allows for a more rapid and reliable interpolation of a potential energy surface within a given accuracy compared to the non-adaptive version.
Application and Analysis of Color Information using Tourist Attraction Image Processing for Souvenir Packaging Design
Creators: name: Thitiporn Lertrusdachakul
Publisher: name: Faculty of Information Science and Technology, Mahanakorn University of Technology
Year: 2020
Subjects: Color Analysis
Color Image Scale
Packaging Design
Souvenir

description: Journal of Information Science and Technology, 10, 1, 48-58
Apply of Deep Learning Techniques to Measure the Sweetness Level of Watermelon via Smartphone
Creators: name: Nattavadee Hongboonmee
Publisher: name: Faculty of Information Science and Technology, Mahanakorn University of Technology
Year: 2020
Subjects: Watermelon Sweetness
Image Classification
Deep Learning
Convolution Neural-Network
Smartphone

description: Journal of Information Science and Technology, 10, 1, 59-69
Constraining the size of the Comptonizing medium by modeling the energy dependent time-lags of kHz QPOs of Neutron star system
Creators: name: Kumar, Nagendra
name: Misra, Ranjeev
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: In earlier works, we had shown that the observed soft lags and r.m.s versus energy of the lower kHz QPO of neutron star binaries can be explained in the framework of a thermal Comptonization model. It was also shown that such an interpretation can provide estimates of the size and geometry of the Comptonizing medium. Here we study the dependence of these estimates on the time-averaged spectral model assumed and on the frequency of the QPO. We use the high quality time lag and r.m.s obtained during March 3rd 1996 observation of 4U 1608-52 by RXTE as well as other observations of the source at different QPO frequencies where a single time-lag between two broad energy bands have been reported. We compare the results obtained when assuming that the time-averaged spectra are represented by the spectrally degenerate "hot" and "cold" seed photon spectral models. We find that for the "hot" seed photon model the medium size is in the range of 0.3-2.0 kms and the size decreases with increasing QPO frequency. On the other hand for the "cold" seed photon model the range for the sizes are much larger 0.5-20 kms and hence perhaps show no variation with QPO frequency. Our results emphasis the need for broad band spectral information combined with high frequency timing to lift this degeneracy. We further show that the r.m.s as a function of energy for the upper kHz QPO is similar to the lower one and indeed we find that the driver for this QPO should be temperature variations of the corona identical to the lower kHz QPO. However, the time lag reported for the upper kHz QPO is hard, which if confirmed, would challenge the simple Comptonization model presented here. It would perhaps imply that reverberation lags are also important and/or the dominate spectral component is not a single temperature medium but a multi-temperature complex one.
description: 9 pages, 8 figures, submitted to MNRAS