cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Keck/MOSFIRE Spectroscopy of z=7-8 Galaxies: Ly$α$ Emission from a Galaxy at z=7.66
Creators: name: Song, Mimi
name: Finkelstein, Steven L.
name: Livermore, Rachael C.
name: Capak, Peter L.
name: Dickinson, Mark
name: Fontana, Adriano
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We report the results from some of the deepest Keck/Multi-Object Spectrometer For Infra-Red Exploration data yet obtained for candidate $z \gtrsim 7$ galaxies. Our data show one significant line detection with 6.5$σ$ significance in our combined 10 hr of integration which is independently detected on more than one night, thus ruling out the possibility that the detection is spurious. The asymmetric line profile and non-detection in the optical bands strongly imply that the detected line is Ly$α$ emission from a galaxy at $z$(Ly$α)=7.6637 \pm 0.0011$, making it the fourth spectroscopically confirmed galaxy via Ly$α$ at $z>7.5$. This galaxy is bright in the rest-frame ultraviolet (UV; $M_{\rm UV} \sim -21.2$) with a moderately blue UV slope ($β=-2.2^{+0.3}_{-0.2}$), and exhibits a rest-frame Ly$α$ equivalent width of EW(Ly$α$) $\sim 15.6^{+5.9}_{-3.6}$ Å. The non-detection of the 11 other $z \sim$ 7-8 galaxies in our long 10 hr integration, reaching a median 5$σ$ sensitivity of 28 Å in the rest-frame EW(Ly$α$), implies a 1.3$σ$ deviation from the null hypothesis of a non-evolving distribution in the rest-frame EW(Ly$α$) between $36.5$, which may signal the evolving neutral fraction in the intergalactic medium at the end of the reionization epoch, although our weak evidence suggests the need for a larger statistical sample to allow for a more robust conclusion.
description: 10 pages, 4 figures, ApJ, in press
On partially wrapped Fukaya categories
Creators: name: Sylvan, Zachary
Publisher: name: arXiv
Year: 2016
Subjects: subject: Symplectic Geometry (math.SG)
subject: FOS: Mathematics

description: We define a new class of symplectic objects called "stops", which roughly speaking are Liouville hypersurfaces in the boundary of a Liouville domain. Locally, these can be viewed as pages of a compatible open book. To a Liouville domain with a collection of disjoint stops, we assign an $A_\infty$-category called its partially wrapped Fukaya category. An exact Landau-Ginzburg model gives rise to a stop, and the corresponding partially wrapped Fukaya category is meant to agree with the Fukaya category one is supposed to assign to the Landau-Ginzburg model. As evidence, we prove a formula that relates these partially wrapped Fukaya categories to the wrapped Fukaya category of the underlying Liouville domain. This operation is mirror to removing a divisor. In v2, we also construct continuation functors without cascades, which should be of independent interest.
description: v3: version accepted by the Journal of Topology. Some of the more routine proofs have been omitted
Emergent eigenstate solution to quantum dynamics far from equilibrium
Creators: name: Vidmar, L.
name: Iyer, D.
name: Rigol, M.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Quantum Gases (cond-mat.quant-gas)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The quantum dynamics of interacting many-body systems has become a unique venue for the realization of novel states of matter. Here we unveil a new class of nonequilibrium states that are eigenstates of an emergent local Hamiltonian. The latter is explicitly time dependent and, even though it does not commute with the physical Hamiltonian, it behaves as a conserved quantity of the time-evolving system. We discuss two examples in which the emergent eigenstate solution can be applied for an extensive (in system size) time: transport in one-dimensional lattices with initial particle (or spin) imbalance, and sudden expansion of quantum gases in optical lattices. We focus on noninteracting spinless fermions, hard-core bosons, and the Heisenberg model. We show that current-carrying states can be ground states of emergent local Hamiltonians, and that they can exhibit a quasimomentum distribution function that is peaked at nonzero (and tunable) quasimomentum. We also show that time-evolving states can be highly-excited eigenstates of emergent local Hamiltonians, with an entanglement entropy that does not exhibit volume-law scaling.
description: 14+6 pages, 6+1 figures, as published
title: 303. PTB-Seminar
title: Aktuelle Fortschritte von Kalibrierverfahren im Nieder- und Hochfrequenzbereich 2017
titleType: Subtitle
Creators: name: Siegner, Uwe
name: Kuhlmann, Karsten
name: Ulm, David
name: Schrader, Thorsten
name: Baaske, Kai
name: Judaschke, Rolf
name: Funck, Torsten
name: Beug, Florian
name: Mohns, Enrico
name: Räther, Peter
name: Roeissle, Günter
name: Theiner, Joachim
Publisher: name: Physikalisch-Technische Bundesanstalt (PTB)
Year: 2017
Subjects: International System of Units (SI)
Revision of the SI
Electrical Units
Josephson Effect
Quantum Hall Effect
Antennenmesstechnik
Nahfeld/Fernfeld-Transformation
Antennenscanner
AC–DC transfer
amplifiers
current shunts
resistors
shunts

description: Vorträge:

 Uwe Siegner, PTB:
 Implementierung des neuen Internationalen Einheitensystems

 Karsten Kuhlmann, PTB:
 Vorstellung eines neuen Kalibrierverfahrens für Mehrtor-VNA

 David Ulm, PTB:
 Aufbau einer Kalibrierdienstleistung für Antennen im Frequenzbereich >1 GHz

 Thorsten Schrader, PTB:
 WERAN – Wechselwirkung von Windenergieanlagen mit terrestrischer Navigation/Radar

 Kai Baaske, PTB:
 Ringvergleich Anstiegszeit im DKD

 Rolf Judaschke, PTB:
 Bestimmung der Impedanz von Koppelnetzwerken nach IEC 61000-4-6

 Joachim Theiner, CAEN ELS S.R.L., Karlsruhe:
 „0-FLUCS“-Stromwandler und ihre Anwendung

 Torsten Funck, PTB:
 AC-DC Transfernormale für kleine Stromstärken

 Enrico Mohns, PTB:
 Aktive Entbürdung von Leistungskomparatoren zur Kalibrierung von Trennstromwandlern

 Florian Beug, PTB:
 Verbesserte Messeinrichtung für die Kalibrierung von Brückennormalen im Frequenzbereich von 225 Hz bis 5 kHz
Quantum ergodicity and Benjamini-Schramm convergence of hyperbolic surfaces
Creators: name: Masson, Etienne Le
name: Sahlsten, Tuomas
Publisher: name: arXiv
Year: 2016
Subjects: subject: Spectral Theory (math.SP)
subject: Mathematical Physics (math-ph)
subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 81Q50, 37D40, 11F72

description: We present a quantum ergodicity theorem for fixed spectral window and sequences of compact hyperbolic surfaces converging to the hyperbolic plane in the sense of Benjamini and Schramm. This addresses a question posed by Colin de Verdière. Our theorem is inspired by results for eigenfunctions on large regular graphs by Anantharaman and the first-named author. It applies in particular to eigenfunctions on compact arithmetic surfaces in the level aspect, which connects it to a question of Nelson on Maass forms. The proof is based on a wave propagation approach recently considered by Brooks, Lindenstrauss and the first-named author on discrete graphs. It does not use any microlocal analysis, making it quite different from the usual proof of quantum ergodicity in the large eigenvalue limit. Moreover, we replace the wave propagator with renormalised averaging operators over discs, which simplifies the analysis and allows us to make use of a general ergodic theorem of Nevo. As a consequence of this approach, we require little regularity on the observables.
description: v3: 25 pages, 3 figures, the proof in Section 9 has been corrected, to appear in Duke Math. J
Suita conjecture for a punctured torus
Creators: name: Dong, Robert Xin
Publisher: name: arXiv
Year: 2016
Subjects: subject: Complex Variables (math.CV)
subject: FOS: Mathematics
subject: Primary 32A25, Secondary 14K25, 31A05

description: For a once-punctured complex torus, we compare the Bergman kernel and the fundamental metric, by constructing explicitly the Evans-Selberg potential and discussing its asymptotic behaviors. This work aims to generalize the Suita type results to potential-theoretically parabolic Riemann surfaces.
Parameter Limits for Neutrino Oscillation with Decoherence in KamLAND
Creators: name: Gomes, G. Balieiro
name: Guzzo, M. M.
name: de Holanda, P. C.
name: Oliveira, R. L. N.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In the framework of quantum open systems we analyze data from KamLAND by using a model that considers neutrino oscillation in a three-family approximation with the inclusion of the decoherence effect. Using a $χ^2$ test we find new limits for the decoherence parameter which we call $γ$, considering the most recent data by KamLAND. Assuming an energy dependence of the type $ γ= γ_0 \left( E/E_0 \right) ^n$, in 95 \% C.L. the limits found are $3.7 \times 10^{-24} GeV$ for $ n=-1$, $6.8 \times 10^{-22} GeV$ for $ n=0$, and $1.5 \times 10^{-19} GeV$ for $ n=1 $ on the energy dependence.
Capped carbon nanotubes with a number of ground state magnetization discontinuities increasing with their size
Creators: name: Konstantinidis, N. P.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The classical ground state magnetic response of fullerene molecules that resemble capped carbon nanotubes is calculated within the framework of the antiferromagnetic Heisenberg model. It is found that the magnetic response depends subtly on spatial symmetry and chirality. Clusters based on armchair carbon nanotubes which are capped with non-neighboring pentagons and have D5d spatial symmetry have a number of magnetization discontinuities which increases with their size. This occurs even though the model completely lacks magnetic anisotropy, and even though the only source of frustration are the two groups of six pentagons located at the ends of the molecules, which become more strongly outnumbered as the clusters are filled in the middle with more unfrustrated hexagons with increasing size. For the cluster with 180 vertices there are already seven magnetization and one susceptibility discontinuities. Contrary to that, similar molecules which have D5h spatial symmetry reach a limit of one magnetization and two susceptibility ground state discontinuities, while fullerene molecules based on zigzag carbon nanotubes and capped by neighboring pentagons also reach a fixed number of discontinuities with increasing size.
description: 15 pages, 10 figures, 4 tables
A Characterization of Symplectic Grassmannians
Creators: name: Occhetta, Gianluca
name: Conde, Luis E. Solá
name: Watanabe, Kiwamu
Publisher: name: arXiv
Year: 2016
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: Primary 14J45, Secondary 14E30, 14M15, 14M17

description: We provide a characterization of Symplectic Grassmannians in terms of their Varieties of Minimal Rational Tangents.
description: As kindly observed by Jun-Muk Hwang, the previous version of the paper (Math. Zeit., 286 (3-4), (2017) 1421-1433) contained an incorrect construction of the vector bundles $\cQ^\vee, \cF_1^\vee$ and $\cF_2^\vee$. However, the main Theorem can be proved by slightly modifying the arguments, as explained in a corrigendum, just published in the same journal. This version implements those changes
Tightening the entropic uncertainty bound in the presence of quantum memory
Creators: name: Adabi, F.
name: Salimi, S.
name: Haseli, S.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The uncertainty principle is a fundamental principle in quantum physics. It implies that the measurement outcomes of two incompatible observables can not be predicted simultaneously. In quantum information theory, this principle can be expressed in terms of entropic measures. Berta \emph{et al}. [\href{http://www.nature.com/doifinder/10.1038/nphys1734}{ Nature Phys. 6, 659 (2010) }] have indicated that uncertainty bound can be altered by considering a particle as a quantum memory correlating with the primary particle. In this article, we obtain a lower bound for entropic uncertainty in the presence of a quantum memory by adding an additional term depending on Holevo quantity and mutual information. We conclude that our lower bound will be tighten with respect to that of Berta \emph{et al.}, when the accessible information about measurements outcomes is less than the mutual information of the joint state. Some examples have been investigated for which our lower bound is tighter than the Berta's \emph{et al.} lower bound. Using our lower bound, a lower bound for the entanglement of formation of bipartite quantum states has obtained, as well as an upper bound for the regularized distillable common randomness.
description: 6 pages, 1 figure to appear in PRA 2016
The Derivation of the Linear Boltzmann Equation from a Rayleigh Gas Particle Model
Creators: name: Matthies, Karsten
name: Stone, George
name: Theil, Florian
Publisher: name: arXiv
Year: 2016
Subjects: subject: Analysis of PDEs (math.AP)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: A linear Boltzmann equation is derived in the Boltzmann-Grad scaling for the deterministic dynamics of many interacting particles with random initial data. We study a Rayleigh gas where a tagged particle is undergoing hard-sphere collisions with background particles, which do not interact among each other. In the Boltzmann-Grad scaling, we derive the validity of a linear Boltzmann equation for arbitrary long times under moderate assumptions on higher moments of the initial distributions of the tagged particle and the possibly non-equilibrium distribution of the background. The convergence of the empiric dynamics to the Boltzmann dynamics is shown using Kolmogorov equations for associated probability measures on collision histories.
description: minor corrections
A minimal integrity basis for the elasticity tensor
Creators: name: Auffray, Nicolas
name: Olive, Marc
name: Kolev, Boris
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We definitively solve the old problem of finding a minimal integrity basis of polynomial invariants of the fourth-order elasticity tensor C. Decomposing C into its SO(3)-irreducible components we reduce this problem to finding joint invariants of a triplet (a, b, D), where a and b are second-order harmonic tensors, and D is a fourth-order harmonic tensor. Combining theorems of classical invariant theory and formal computations, a minimal integrity basis of 297 polynomial invariants for the elasticity tensor is obtained for the first time.
The impact of physician provided human phenotype ontology (HPO) terms on whole exome sequencing (WES) analysis
Creators: name: Strandberg, Erik Michael
Publisher: name: No Publisher Supplied
Year: 2023

description: Whole exome sequencing (WES) as a first-tier test has become a consideration for many healthcare providers due to its increased cost effectiveness, simplified workflow, and ability to identify novel genes. WES analysis considers variant allele frequency, predicted pathogenicity, and patient phenotype, in the form of standardized Human Phenotype Ontology (HPO) terms, to be used in bioinformatic analysis to filter and rank variants that are suspected to be disease-causing. A previous study, in collaboration with PreventionGenetics, part of Exact Sciences, sought to identify if there was a relationship between positive WES results and the number of HPO terms provided in the analysis. The results indicated that increasing the total number of HPO terms did not increase the likelihood of obtaining a positive result, but indicated there may be a relationship regarding the total number of terms provided directly by the clinician and a positive result. In collaboration with PreventionGenetics, this study aims to clarify the relationship between the computational pipeline ranking of disease-causing variants using HPO terms from clinician-provided checklists and terms abstracted directly from provided medical records. A retrospective case-only study was performed using data from PreventionGenetics, where HPO terms for patients who had completed WES testing and had a disease-causing variant identified were examined. Analyses were conducted comparing a combination of listings of HPO terms from clinician-provided checklist, listings of HPO terms extracted from medical records, and listings of randomly selected HPO terms from the medical records. Results indicated that disease-causing variants would rank better when using a combination of clinician provided terms and terms abstracted from clinical notes; however, analysis using only clinician provided terms was still able to identify the disease-causing variant in each case. Additionally, it was found that the addition of extraneous HPO terms to analysis does not significantly impact the ranking of the disease-causing variant. Further analyses may be able to clarify the impact of HPO term “quality” in analysis.
An (MI)LP-based Primal Heuristic for 3-Architecture Connected Facility Location in Urban Access Network Design
Creators: name: D'Andreagiovanni, Fabio
name: Mett, Fabian
name: Pulaj, Jonad
Publisher: name: arXiv
Year: 2015
Subjects: subject: Optimization and Control (math.OC)
subject: Artificial Intelligence (cs.AI)
subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences

description: We investigate the 3-architecture Connected Facility Location Problem arising in the design of urban telecommunication access networks. We propose an original optimization model for the problem that includes additional variables and constraints to take into account wireless signal coverage. Since the problem can prove challenging even for modern state-of-the art optimization solvers, we propose to solve it by an original primal heuristic which combines a probabilistic fixing procedure, guided by peculiar Linear Programming relaxations, with an exact MIP heuristic, based on a very large neighborhood search. Computational experiments on a set of realistic instances show that our heuristic can find solutions associated with much lower optimality gaps than a state-of-the-art solver.
description: This is the authors' final version of the paper published in: Squillero G., Burelli P. (eds), EvoApplications 2016: Applications of Evolutionary Computation, LNCS 9597, pp. 283-298, 2016. DOI: 10.1007/978-3-319-31204-0_19. The final publication is available at Springer via http://dx.doi.org/10.1007/978-3-319-31204-0_19
Decomposable theta divisors and generic vanishing
Creators: name: Schreieder, Stefan
Publisher: name: arXiv
Year: 2016
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 14K12, 14F17, 14H42

description: We study ample divisors X with only rational singularities on abelian varieties that decompose into a sum of two lower dimensional subvarieties, X=V+W. For instance, we prove an optimal lower bound on the degree of the corresponding addition map, and show that the minimum can only be achieved if X is a theta divisor. Conjecturally, the latter happens only on Jacobians of curves and intermediate Jacobians of cubic threefolds. As an application, we prove that nondegenerate generic vanishing subschemes of indecomposable principally polarized abelian varieties are automatically reduced and irreducible, have the expected geometric genus, and property (P) with respect to their theta duals.
description: 21 pages; revised version, title changed, results improved
Estimation of the sample covariance matrix from compressive measurements
Creators: name: Pourkamali-Anaraki, Farhad
Publisher: name: arXiv
Year: 2015
Subjects: subject: Machine Learning (stat.ML)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: This paper focuses on the estimation of the sample covariance matrix from low-dimensional random projections of data known as compressive measurements. In particular, we present an unbiased estimator to extract the covariance structure from compressive measurements obtained by a general class of random projection matrices consisting of i.i.d. zero-mean entries and finite first four moments. In contrast to previous works, we make no structural assumptions about the underlying covariance matrix such as being low-rank. In fact, our analysis is based on a non-Bayesian data setting which requires no distributional assumptions on the set of data samples. Furthermore, inspired by the generality of the projection matrices, we propose an approach to covariance estimation that utilizes sparse Rademacher matrices. Therefore, our algorithm can be used to estimate the covariance matrix in applications with limited memory and computation power at the acquisition devices. Experimental results demonstrate that our approach allows for accurate estimation of the sample covariance matrix on several real-world data sets, including video data.
description: IET Signal Processing
Landau damping for the linearized Vlasov Poisson equation in a weakly collisional regime
Creators: name: Tristani, Isabelle
Publisher: name: arXiv
Year: 2016
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: In this paper, we consider the linearized Vlasov-Poisson equation around an homogeneous Maxwellian equilibrium in a weakly collisional regime: there is a parameter $\eps$ in front of the collision operator which will tend to $0$. Moreover, we study two cases of collision operators, linear Boltzmann and Fokker-Planck. We prove a result of Landau damping for those equations in Sobolev spaces uniformly with respect to the collision parameter $\eps$ as it goes to $0$.
On the Applicability of the Geodesic Deviation Equation in General Relativity
Creators: name: Philipp, Dennis
name: Puetzfeld, Dirk
name: Laemmerzahl, Claus
Publisher: name: arXiv
Year: 2016
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Within the theory of General Relativity, we study the solution and range of applicability of the standard geodesic deviation equation in highly symmetric spacetimes. In the Schwarzschild spacetime, the solution is used to model satellite orbit constellations and their deviations around a spherically symmetric Earth model. We investigate the spatial shape and orbital elements of perturbations of circular reference curves. In particular, we reconsider the deviation equation in Newtonian gravity and then determine relativistic effects within the theory of General Relativity by comparison. The deviation of nearby satellite orbits, as constructed from exact solutions of the underlying geodesic equation, is compared to the solution of the geodesic deviation equation to assess the accuracy of the latter. Furthermore, we comment on the so-called Shirokov effect in the Schwarzschild spacetime and limitations of the first order deviation approach.
description: 30 pages, 10 figures; updated version with journal reference
Quantum gravity without vacuum dispersion
Creators: name: Coumbe, Daniel
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: A generic prediction of quantum gravity is the vacuum dispersion of light, and hence that a photon's speed depends on its energy. We present further numerical evidence for a scale dependent speed of light in the causal dynamical triangulation (CDT) approach to quantum gravity. We show that the observed scale dependent speed of light in CDT can be accounted for by a scale dependent transformation of geodesic distance, whose specific functional form implies a discrete equidistant area spectrum. We make two non-trivial tests of the proposed scale transformation: a comparison with the leading order quantum correction to the gravitational potential and a comparison with the generalised uncertainty principle. In both cases, we obtain the same functional form. However, contrary to the widespread prediction of vacuum dispersion in quantum gravity, numerous experiments have now definitively ruled out linear vacuum dispersion beyond Planckian energy scales, and have now even constrained quadratic dispersion. Motivated by these experimental constraints we seek to reconcile quantum gravity with the absence of vacuum dispersion. We point out that given a scale dependent geodesic distance, a scale dependent time interval becomes essential to maintaining an invariant speed of light. We show how a particular scale dependent time interval allows a photon's speed to remain independent of its energy.
description: Version published in International Journal of Modern Physics D. 13 pages, 3 figures
Ordering phenomena in a heterostructure of frustrated and unfrustrated triangular-lattice Ising layers
Creators: name: Žukovič, Milan
name: Tomita, Yusuke
name: Kamiya, Y.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We study critical and magnetic properties of a bilayer Ising system consisting of two triangular planes A and B, with the antiferromagnetic (AF) coupling $J_{\rm A}$ and the ferromagnetic (FM) one $J_{\rm B}$ for the respective layers, which are coupled by the interlayer interaction $J_{\rm AB}$ by using Monte Carlo simulations. When $J_{\rm A}$ and $J_{\rm B}$ are of the same order, the unfrustrated FM plane orders first at a high temperature $T_{c1} \sim J_{\rm B}$. The spontaneous FM order then exerts influence on the other frustrated AF plane as an effective magnetic field, which subsequently induces a ferrimagnetic order in this plane at low temperatures below $T_{c2}$. When short-range order is developed in the AF plane while the influence of the FM plane is still small, there appears a preemptive Berezinskii-Kosterlitz-Thouless-like pseudocritical crossover regime just above the ferrimagnetic phase transition point, where the short-distance behavior up to a rather large length scale exponentially diverging in $\propto \JA / T$ is controlled by a line of Gaussian fixed points at $T = 0$. In the crossover region, a continuous variation in the effective critical exponent $4/9 \lesssim η^{\rm eff} \lesssim 1/2$ is observed. The phase diagram by changing the ratio $J_{\rm A}/J_{\rm B}$ is also investigated.
description: 13 pages, 16 figures
The (extended) dynamical mean field theory combined with the two-particle irreducible functional renormalization-group approach as a tool to study strongly-correlated systems
Creators: name: Katanin, A. A.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We propose new approach for treatment of local and non-local interactions in correlated electronic systems, which uses self-energy and the two-particle irreducible vertices, obtained from (extended) dynamical mean-field theory, as an input of two-particle irreducible functional renormalization-group (2PI-fRG) approach. Using 2PI-fRG approach allows us to treat both, local and non-local interactions. In case of purely local interaction the corresponding equations have similar (although not identical) structure to the earlier developed DMF$^2$RG approach. In a simplest truncation, neglecting scale-dependence of the two-particle irreducible vertices, we reproduce the results for the two-particle vertices/susceptibilities in the ladder approximation of the dual boson or D$Γ$A approach; in more sophisticated truncations the method allows us to consider non-local corrections to the self-energy, as well as the interplay of charge- and spin correlations. treatment of vertex renormalizations. The proposed scheme is tested on the two-dimensional standard and extended $U$-$V$ half-filled Hubbard models. For the standard Hubbard model we obtain non-local self-energy, which is in agreement with numerical studies; for the extended Hubbard model we obtain the boundary of charge instability, which agrees well with the results of the dual boson (DB) approach. We also find that the effect of spin correlations on electron interaction in the charge channel, not considered previously in the DB approach, only slightly reduces critical next-nearest-neighbor interaction of charge instability of the extended Hubbard model at the considered finite small temperature, yielding better agreement with dynamic cluster approximation. The considered method is rather general and can be applied to study various phenomena in strongly-correlated electronic systems.
description: 31 pages, 5 figures
Full-Pose Tracking Control for Aerial Robotic Systems with Laterally-Bounded Input Force
Creators: name: Franchi, Antonio
name: Carli, Ruggero
name: Bicego, Davide
name: Ryll, Markus
Publisher: name: arXiv
Year: 2016
Subjects: subject: Optimization and Control (math.OC)
subject: Robotics (cs.RO)
subject: Systems and Control (eess.SY)
subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: In this paper, we define a general class of abstract aerial robotic systems named Laterally Bounded Force (LBF) vehicles, in which most of the control authority is expressed along a principal thrust direction, while in the lateral directions a (smaller and possibly null) force may be exploited to achieve full-pose tracking. This class approximates well platforms endowed with non-coplanar/non-collinear rotors that can use the tilted propellers to slightly change the orientation of the total thrust w.r.t. the body frame. For this broad class of systems, we introduce a new geometric control strategy in SE(3) to achieve, whenever made possible by the force constraints, the independent tracking of position-plus-orientation trajectories. The exponential tracking of a feasible full-pose reference trajectory is proven using a Lyapunov technique in SE(3). The method can deal seamlessly with both under- and fully-actuated LBF platforms. The controller guarantees the tracking of at least the positional part in the case that an unfeasible full-pose reference trajectory is provided. The paper provides several experimental tests clearly showing the practicability of the approach and the sharp improvement with respect to state of-the-art approaches.
Improved fractal Weyl bounds for hyperbolic manifolds
Creators: name: Dyatlov, Semyon
name: Borthwick, David
name: Weich, Tobias
Publisher: name: arXiv
Year: 2015
Subjects: subject: Spectral Theory (math.SP)
subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: We give a new fractal Weyl upper bound for resonances of convex co-compact hyperbolic manifolds in terms of the dimension $n$ of the manifold and the dimension $δ$ of its limit set. More precisely, we show that as $R\to\infty$, the number of resonances in the box $[R,R+1]+i[-β,0]$ is $O(R^{m(β,δ)+})$, where the exponent $m(β,δ)=\min(2δ+2β+1-n,δ)$ changes its behavior at $β=(n-1-δ)/2$. In the case $δ δ-(n-1)/2\}$. Both results use the fractal uncertainty principle point of view recently introduced in [arXiv:1504.06589]. The appendix presents numerical evidence for the Weyl upper bound.
description: 42 pages, 10 figures; with an appendix by David Borthwick and Tobias Weich. Revised following suggestions of the referee. To appear in JEMS
Adaptive Finite Element Method for fractional differential equations using Hierarchical Matrices
Creators: name: Zhao, Xuan
name: Hu, Xiaozhe
name: Cai, Wei
name: Karniadakis, George Em
Publisher: name: arXiv
Year: 2016
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics
subject: 80M10, 65M15, 65M55, 26A33, 41A25 80M10, 65M15, 65M55, 26A33, 41A25

description: A robust and fast solver for the fractional differential equation (FDEs) involving the Riesz fractional derivative is developed using an adaptive finite element method on non-uniform meshes. It is based on the utilization of hierarchical matrices ($\mathcal{H}$-Matrices) for the representation of the stiffness matrix resulting from the finite element discretization of the FDEs. We employ a geometric multigrid method for the solution of the algebraic system of equations. We combine it with an adaptive algorithm based on a posteriori error estimation to deal with general-type singularities arising in the solution of the FDEs. Through various test examples we demonstrate the efficiency of the method and the high-accuracy of the numerical solution even in the presence of singularities. The proposed technique has been verified effectively through fundamental examples including Riesz, Left/Right Riemann-Liouville fractional derivative and, furthermore, it can be readily extended to more general fractional differential equations with different boundary conditions and low-order terms. To the best of our knowledge, there are currently no other methods for FDEs that resolve singularities accurately at linear complexity as the one we propose here.
"When the world stopped": how undergraduate women leaders developed their identities during an unanticipated transition
Creators: name: Klein, Krista M.
Publisher: name: No Publisher Supplied
Year: 2023

description: One of the many aims of colleges and universities is helping students to develop leadership knowledge and skills in a global world. This is recognized to be a complex goal that, among other influences, involves identity development and how students understand themselves as leaders. Developing a leadership identity is a multifaceted process that can be influenced by many factors including time, external events, intentional programs and positions, and transitional experiences. This study focuses on leadership identity development for college women, a group that has become a focus of increasing attention in recent years. The study also considers identity development during transitions, such as that thrust upon all of us by the COVID-19 pandemic. In this study, the transitional experience is centered and defined as an event that results in changed roles, relationships, routines, and assumptions.In this dissertation, specifically, I explore how undergraduate women make meaning of their formal leadership experiences during a transition in their personal and/or professional lives, with an emphasis on the process of leadership identify development. The study focuses on students’ experiences reported over time during the transition to remote education at the start of and during the COVID-19 pandemic. The findings from this study have implications for higher education practice, college student leadership development, and formal and informal training and development for women leaders on campus.
Quantum simulation of $(1+1)$-dimensional U(1) gauge-Higgs model on a lattice by cold Bose gases
Creators: name: Kuno, Yoshihito
name: Sakane, Shinya
name: Kasamatsu, Kenichi
name: Ichinose, Ikuo
name: Matsui, Tetsuo
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We present a theoretical study of quantum simulations of $(1+1)$-dimensional U(1) lattice gauge-Higgs models, which contain a compact U(1) gauge field and a Higgs matter field, by using ultra-cold bosonic gases on a one-dimensional optical lattice. Starting from the extended Bose-Hubbard model with on-site and nearest-neighbor interactions, we derive the U(1) lattice gauge-Higgs model as a low-energy effective theory. The derived gauge-Higgs model exhibits nontrivial phase transitions between confinement and Higgs phases, and we discuss the relation with the phase transition in the extended Bose-Hubbard model. Finally, we study real-time dynamics of an electric flux by the Gross-Pitaevskii equations and the truncated Wigner approximation. The dynamics is governed by a bosonic analog of the Schwinger mechanism, i.e., shielding of an electric flux by a condensation of Higgs fields, which occurs differently in the Higgs and the confinement phase. These results, together with the obtained phase diagrams, shall guide experimentalists in designing quantum simulations of the gauge-Higgs models by cold gases.
description: 15 pages, 12 figures
Data for: Developmental plasticity in anurans: meta-analysis reveals effects of larval environments on size at metamorphosis and timing of metamorphosis
Creators: name: Albecker, Molly
name: Strobel, Sarah McKay
name: Womack, Molly
Publisher: name: Zenodo
Year: 2023
Subjects: amphibian
Amphibian metamorphosis
Life cycles
Metaanalysis

description: Many anuran amphibians (frogs and toads) rely on aquatic habitats during their larval stage. The quality of this environment can significantly impact the overall lifetime fitness and dynamics of the population. Over 450 studies have been published on the impact of the environment on anuran developmental plasticity, yet we lack a synthesis of these effects across different environments. We conducted a meta-analysis and used a comparative approach to understand whether developmental plasticity in response to different larval environments produces predictable changes in metamorphic phenotypes. We analyzed data from 124 studies spanning 80 anuran species and six larval environments and showed that interspecific variation in mass at metamorphosis and the duration of the larval period is partly explained by the type of environment experienced during the larval period. Phylogenetic relationships among species were not associated with variation in mass at metamorphosis plasticity or duration of the larval period plasticity. Larval environments tended to reduce mass at metamorphosis relative to control conditions, with the degree of change depending on the identity and severity of environmental change. Higher temperatures and lower water levels shortened the duration of the larval period, whereas less food and higher densities increased the duration of the larval period. Our results provide a foundation for future studies on developmental plasticity, especially in response to global changes. This study provides motivation for additional work that links developmental plasticity with fitness consequences within and across life stages, as well as how the outcomes described here are altered in compounding environments.
La ricostruzione del Tempio Il restauro post-bellico del Tempio Malatestiano di Rimini
Creators: name: Sebregondi, Giulia Ceriani
Publisher: name: La Rivista di Engramma
Year: 2008
Subjects: WWII
Malatesta Temple
Restoration

description: Around the post-war restoration of the Malatesta Temple in Rimini, some crucial issues in the Italian political and cultural history of the immediate post-war period seem to have coagulated. We will examine the story in this essay, proceeding on three parallel and interconnected levels: the technical one, of the intervention carried out; the cultural one, of the theoretical choices that inspired the restoration, linked to the historiography of the time; and the political one, of the influence of the Italian and international situation on the eve of the 1948 elections.
Chromospheric modeling for CARMENES targets with PHOENIX
Creators: name: Hintz, Dominik
name: Fuhrmeister, Birgit
name: Czesla, Stefan
name: Schmitt, Jürgen H. M. M.
Publisher: name: Zenodo
Year: 2023
Subjects: Stellar Activity
Chromospheres
M dwarfs

description: Stellar activity is ubiquitous in M dwarfs. It is a notorious nuisance for high-precision radial
 velocity planet searches and produces hazardous environments for the atmospheres of planets
 orbiting these stars. The characterization of the temperature structure of the chromosphere is
 imperative to understand the upper atmosphere of late-type stars and its impact on their observed
 spectra. Using the stellar atmosphere code PHOENIX, we constructed a set of 1D chromospheric
 models with empirical temperature structure to simultaneously fit the lines of Na I D2, H\(\alpha\), and the
 bluest Ca II infrared triplet line in a sample of 50 M2-3 dwarfs observed by CARMENES (Calar
 Alto high-Resolution search for M dwarfs with Exoearths with Near-infrared and optical Échelle
 Spectrographs). For the inactive stars, we find good agreement with individual models with a
 temperature structure corresponding to modified VAL C models. Reproducing the chromospheric
 lines of the active stars requires linear combinations of an inactive and an active model component,
 from which we also obtain surface filling factors for the respective components. For stars observed
 at different activity levels, our modeling yields a significant correlation between the surface filling
 factor of the active model component and the activity level. Although the models are not optimized
 for the He I infrared line at 10 830 Å, the best-fit models also give an adequate prediction of the
 respective line absorption for most stars of the stellar sample. Furthermore, we performed a
 detailed analysis of the He I infrared line behavior in prescribed model configurations with different
 levels of activity. The behavior of the He I infrared line strengths as a function of the respective
 EUV radiation shows the need of the mechanism of photoionization and recombination to form the
 line for inactive models, while collisions start to contribute for more active models.
description: {"references": ["Hintz, D. et al. (2019), A&A, 623, A136", "Hintz, D. et al. (2020), A&A, 638, A115", "Vernazza, J. E. et al. (1981), ApJS, 45, 635V", "Hauschildt, P. H. (1992), JQSRT, 47, 433", "Hauschildt, P. H. (1993), JQSRT, 50, 301", "Hauschildt, P. H. & Baron, E. (1999), JCoAM, 109, 41", "Quirrenbach, A. et al. (2018), SPIE Conf. Ser., 10702, 107020W", "Andretta, V. & Jones, H. P. (1997), ApJ, 489, 375"]}
Memoryprints: identifying individuals based on memory recall
Creators: name: Kochrekar, Siddhant Mohan
Publisher: name: No Publisher Supplied
Year: 2023

description: This research explores the feasibility of using human memory recall as a form of user identification. Traditional authentication methods such as passwords and biometrics have well-known limitations, including susceptibility to theft or duplication. In contrast, human memory is highly individualized and difficult to imitate. To evaluate this hypothesis, a user study was carried out, which included 87 participants. These individuals were instructed to recall a particular group of words in a delayed free recall (DFR) setup. We qualitatively and quantitatively analyzed the patterns and characteristics of their memory recall using machine learning algorithms in Classification and Similarity settings. Our results show that memory recall can be a reliable and effective means of user identification, with an accuracy rate of 78%. Overall, this research demonstrates the promise of using human memory recall for user identification, highlighting its potential as a valuable addition to the authentication landscape.
Voigt, Karl Heinz: Die Heiligungsbewegung zwischen Methodistischer Kirche und Landeskirchlicher Gemeinschaft
Creators: name: Vom Orde, Klaus
Publisher: name: European journal of theology
Year: 2024

description: European journal of theology, V. 7 N. 2 (1998): European Journal of Theology, Band 7, Heft 2
Letter from R.E. McAlpine and Anna Ballagh McAlpine to William Elliot Griffis, February 1, 1927
Creators: name: McAlpine, Robert Eugenius
name: McAlpine, Anna Ballagh
Publisher: name: No Publisher Supplied
Year: 1927

description: Extends kind salutations and apologizes for not being present during Griffis' previous trip to Tokyo. Informs Griffis of Father Ballagh, who can guide Griffis when in Yokohama.
The method used to analyse claims such as the Generalised Tipping Curve of the SIM pulling tests the SIM wind load analysis
Creators: name: Sterken, Peter
Publisher: name: Open Science Framework
Year: 2022
Subjects: subject: Plant Sciences
subject: Mechanical Engineering
subject: FOS: Mechanical engineering
subject: Physical Sciences and Mathematics
subject: Agriculture
subject: Engineering Physics
subject: Life Sciences
subject: Environmental Sciences
subject: Biomechanical Engineering
subject: Physics
subject: Other Plant Sciences
subject: Forest Sciences
subject: Engineering

description: It will be shown that the published “Generalised Tipping Curve” (GTC), which purportedly predicts the uprooting of trees based on empirical data, is suggestive of misinformation. Entirely different SIM and other curves were found that had already been in use since at least 1983 by comparatively unknown authors and 2003 (SIM curve) until now. This paper also shows that the highly-cited and influential proclamations regarding “dynamic” versus “quasi-static” WLA, may be incorrect as their results could perfectly be simulated with a simle formula for stiff brick-made chimneys.
Burgess-like subconvexity for $\mathrm{GL}_1$
Creators: name: Wu, Han
Publisher: name: arXiv
Year: 2016
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics

description: We generalize our previous method on subconvexity problem for $\mathrm{GL}_2 \times \mathrm{GL}_1$ with cuspidal representations to Eisenstein series, and deduce a Burgess-like subconvex bound for Hecke characters, i.e., the bound $|L(1/2,χ)| \ll_{\mathbf{F},ε} \mathbf{C}(χ)^{1/4-(1-2θ)/16+ε}$ for varying Hecke characters $χ$ over a number field $\mathbf{F}$ with analytic conductor $\mathbf{C}(χ)$. As a main tool, we apply the extended theory of regularized integral due to Zagier developed in a previous paper to obtain the relevant triple product formulas of Eisenstein series.
description: Final version, to appear in Compositio Mathematica
Quantum gates via continuous time quantum walks in multiqubit systems with non-local auxiliary states
Creators: name: Solenov, Dmitry
Publisher: name: arXiv
Year: 2015
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Non-local higher-energy auxiliary states have been successfully used to entangle pairs of qubits in different quantum computing systems. Typically a longer-span non-local state or sequential application of few-qubit entangling gates are needed to produce a non-trivial multiqubit gate. In many cases a single non-local state that span over the entire system is difficult to use due to spectral crowding or impossible to have. At the same time, many multiqubit systems can naturally develop a network of multiple non-local higher-energy states that span over few qubits each. We show that continuous time quantum walks can be used to address this problem by involving multiple such states to perform local and entangling operations concurrently on many qubits. This introduces an alternative approach to multiqubit gate compression based on available physical resources. We formulate general requirements for such walks and discuss configurations of non-local auxiliary states that can emerge in quantum computing architectures based on self-assembled quantum dots, defects in diamond, and superconducting qubits, as examples. Specifically, we discuss a scalable multiqubit quantum register constructed as a single chain with nearest-neighbor interactions. We illustrate how quantum walks can be configured to perform single-, two- and three-qubit gates, including Hadamard, Control-NOT, and Toffoli gates. Continuous time quantum walks on graphs involved in these gates are investigated.
description: 43 pages, 11 figures, with TOC