cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
An evaluation of the world wide web as a strategic marketing tool for the Egyptian hotel sector
Creators: name: Nassar, Mohamed
Publisher: name: Cardiff Metropolitan University
Year: 2022
Subjects: Tourism marketing

description:
 An analysis of the literature on web marketing of hotel websites reveals the potential of the World Wide Web (the Web) to enable small hotels to compete with international chain hotels in the global marketplace. However, the literature also emphasizes the importance of branding in determining consumer choice. Thus the Web presents an inherent dilemma for small (independent and multiple independent) hotels unless they effectively utilize the unique characteristics of the Web to positively enhance their images in the mind of customer, i.e. to build their brands. However, little attention has been paid to how a website can be used to build a hotel brand - an issue which is critically important to the survival of small hotels and the focus of this thesis. This constructionist study adopts a phenomenological perspective to evolve a model for the evaluation of small hotels websites in terms of their brand-building capacity and identifies 28 consumer-relevant features grouped into a pyramid of six considerations (accessibility; information; credibility; e-commerce; immediacy; customer relationship). Each feature is codified in terms of good, satisfactory and sub-optimal performance into an EXCEL spreadsheet set up to produce a radar plot for visual presentation of the results. From this, areas of weakness in website design can be determined and remedial action prioritized. The thesis then examines a case study of small Egyptian hotels and their exploitation of the Web as a strategic marketing tool. This is achieved through evaluating Egyptian hotel websites and interviewing Egyptian hotel marketers and web designers. The results of the evaluation of the websites show that: most of these hotels websites performed 'satisfactory' and 'sub-optimal' on many of the evaluated website design features; they are not designed as part of an integrated marketing strategy and therefore the Egyptian small hotels in this study do not exploit the unique characteristics of the Web to best advantage and face a branding dilemma in the global marketplace. The thesis concludes that there are considerable opportunities for enhancing the understanding of the potential of the Web to build the hotel brand and makes recommendations as to priorities for focus.
Unruh-Fulling effect in nonlocal field theory: The role of Unruh decomposition
Creators: name: Das, Ashmita
name: Majhi, Bibhas Ranjan
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We investigate the Unruh-Fulling effect in a class of nonlocal field theories by examining both the number operator and Unruh-DeWitt detector methods. Unlike in previous literature, we use Unruh quantization to quantize the matter field. Such choice, as oppose to standard Minkowski decomposition, naturally incorporates the time translational invariance in the positive frequency Wightman function and thus captures the thermal equilibrium of the system. We analyze the Unruh-Fulling effect for a massless real scalar field in both the Lorentz noninvariant and Lorentz invariant nonlocal theories. In Lorentz noninvariant nonlocal theory, the expectation value of number operator and the response function of the detector are modified by an overall multiplicative factor. Whereas in Lorentz invariant nonlocal theory these quantities remain identical to those of the standard Unruh-Fulling effect. The temperature of the thermal bath remains unaltered for both the Lorentz noninvariant and Lorentz invariant nonlocal theories. Therefore, in terms of temperature, the nonlocal Unruh-Fulling effect is universal while it is derived via Unruh quantization, whereas the transition rate may be modified.
description: Minor modifications, published in Physical Review D
Are there Einsteinian gravities involving covariant derivatives of the Riemann tensor?
Creators: name: Edelstein, Jose D.
name: Sánchez, Alberto Rivadulla
name: Rodríguez, David Vázquez
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We study the particle content of higher derivative theories of gravity built with contractions of the Riemann tensor and its covariant derivatives. In the absence of the latter, there is a family of theories exhibiting an Einsteinian spectrum known as generalized quasi-topological gravities. In turn, we present a no-go result for the construction of Einsteinian gravities involving covariant derivatives of the Riemann tensor. We find evidences suggesting that (truncated series) finite order Lagrangians with covariant derivatives of the Riemann tensor generically present ghosts in their spectrum. This might be interpreted as a hint of non-locality in any healthy UV completion of General Relativity.
description: 22 pages; v2: a possible counterexample is discussed in the context of Effective Field Theory
Non-invasive nanoscale potentiometry and ballistic transport in epigraphene nanoribbons
Creators: name: De Cecco, A.
name: Prudkovskiy, V. S.
name: Wander, D.
name: Berger, R. Ganguly C.
name: de Heer, W. A.
name: Courtois, H.
name: Winkelmann, C. B.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The recent observation of non-classical electron transport regimes in two-dimensional materials has called for new high-resolution non-invasive techniques to locally probe electronic properties. We introduce a novel hybrid scanning probe technique to map the local resistance and electrochemical potential with nm- and $μ$V resolution, and we apply it to study epigraphene nanoribbons grown on the sidewalls of SiC substrate steps. Remarkably, the potential drop is non uniform along the ribbons, and $μ$m-long segments show no potential variation with distance. The potential maps are in excellent agreement with measurements of the local resistance. This reveals ballistic transport in ambient condition, compatible with micrometer-long room-temperature electronic mean free paths.
Omnimodal topological polarization of bilayer networks: analysis in the Maxwell limit and experiments on a 3D-printed prototype
Creators: name: Charara, Mohammad
name: McInerney, James
name: Sun, Kai
name: Mao, Xiaoming
name: Gonella, Stefano
Publisher: name: arXiv
Year: 2022
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Periodic networks on the verge of mechanical instability, called Maxwell lattices, are known to exhibit zero-frequency modes localized to their boundaries. Topologically polarized Maxwell lattices, in particular, focus these zero modes to one of their boundaries in a manner that is protected against disorder by the reciprocal-space topology of the lattice's band structure. Here, we introduce a class of mechanical bilayers as a model system for designing topologically protected edge modes that couple in-plane dilational and shearing modes to out-of-plane flexural modes, a paradigm that we refer to as omnimodal polarization. While these structures exhibit a high-dimensional design space that makes it difficult to predict the topological polarization of generic geometries, we are able to identify a family of mirror-symmetric bilayers that inherit the in-plane modal localization of their constitutive monolayers whose topological polarization can be determined analytically. Importantly, the coupling between the layers results in the emergence of omnimodal polarization, whereby in-plane and out-of-plane edge modes localize on the same edge. We demonstrate these theoretical results by fabricating a mirror-symmetric, topologically polarized kagome bilayer consisting of a network of elastic beams via additive manufacturing and confirm this finite-frequency polarization via finite element analysis and laser-vibrometry experiments.
GRAND for Rayleigh Fading Channels
Creators: name: Abbas, Syed Mohsin
name: Jalaleddine, Marwan
name: Gross, Warren J.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: Guessing Random Additive Noise Decoding (GRAND) is a code-agnostic decoding technique for short-length and high-rate channel codes. GRAND tries to guess the channel noise by generating test error patterns (TEPs), and the sequence of the TEPs is the main difference between different GRAND variants. In this work, we extend the application of GRAND to multipath frequency non-selective Rayleigh fading communication channels, and we refer to this GRAND variant as Fading-GRAND. The proposed Fading-GRAND adapts its TEP generation to the fading conditions of the underlying communication channel, outperforming traditional channel code decoders in scenarios with $L$ spatial diversity branches as well as scenarios with no diversity. Numerical simulation results show that the Fading-GRAND outperforms the traditional Berlekamp-Massey (B-M) decoder for decoding BCH code $(127,106)$ and BCH code $(127,113)$ by $\mathbf{0.5\sim6.5}$ dB at a target FER of $10^{-7}$. Similarly, Fading-GRAND outperforms GRANDAB, the hard-input variation of GRAND, by $0.2\sim8$ dB at a target FER of $10^{-7}$ with CRC $(128,104)$ code and RLC $(128,104)$. Furthermore the average complexity of Fading-GRAND, at $\frac{E_b}{N_0}$ corresponding to target FER of $10^{-7}$, is $\frac{1}{2}\times\sim \frac{1}{46}\times$ the complexity of GRANDAB.
description: To appear in IEEE Global Communications Conference (GLOBECOM) 2022 Workshops
Block Switching: A Stochastic Approach for Deep Learning Security
Creators: name: Wang, Xiao
name: Wang, Siyue
name: Chen, Pin-Yu
name: Lin, Xue
name: Chin, Peter
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (cs.LG)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Recent study of adversarial attacks has revealed the vulnerability of modern deep learning models. That is, subtly crafted perturbations of the input can make a trained network with high accuracy produce arbitrary incorrect predictions, while maintain imperceptible to human vision system. In this paper, we introduce Block Switching (BS), a defense strategy against adversarial attacks based on stochasticity. BS replaces a block of model layers with multiple parallel channels, and the active channel is randomly assigned in the run time hence unpredictable to the adversary. We show empirically that BS leads to a more dispersed input gradient distribution and superior defense effectiveness compared with other stochastic defenses such as stochastic activation pruning (SAP). Compared to other defenses, BS is also characterized by the following features: (i) BS causes less test accuracy drop; (ii) BS is attack-independent and (iii) BS is compatible with other defenses and can be used jointly with others.
description: Accepted by AdvML19: Workshop on Adversarial Learning Methods for Machine Learning and Data Mining at KDD, Anchorage, Alaska, USA, August 5th, 2019, 5 pages
Testing spherical evolution for modelling void abundances
Creators: name: Achitouv, Ixandra
name: Neyrinck, Mark
name: Paranjape, Aseem
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We compare analytical predictions of void volume functions to those measured from N-body simulations, detecting voids with the zobov void finder. We push to very small, nonlinear voids, below few Mpc radius, by considering the unsampled DM density field. We also study the case where voids are identified using halos. We develop analytical formula for the void abundance of both the excursion set approach and the peaks formalism. These formula are valid for random walks smoothed with a top-hat filter in real space, with a large class of realistic barrier models. We test the extent to which the spherical evolution approximation, which forms the basis of the analytical predictions, models the highly aspherical voids that occur in the cosmic web, and are found by a watershed-based algorithm such as zobov. We show that the volume function returned by zobov is quite sensitive to the choice of treatment of sub-voids, a fact that has not been appreciated previously. For reasonable choices of sub-void exclusion, we find that the Lagrangian density delta_v of the zobov voids -- which is predicted to be a constant delta_v = -2.7 in the spherical evolution model -- is different from the predicted value, showing substantial scatter and scale dependence. This result applies to voids identified at z=0 with effective radius between 1 and 10 Mpc/h. Our analytical approximations are flexible enough to give a good description of the resulting volume function; however, this happens for choices of parameter values that are different from those suggested by the spherical evolution assumption. We conclude that analytical models for voids must move away from the spherical approximation in order to be applied successfully to observations, and we discuss some possible ways forward.
description: 12 pages,5 figures Published in MNRAS
Self-reported hearing handicap in adults aged 55 to 81 years is modulated by hearing abilities, frailty, mental health, and willingness to use hearing aids
Creators: name: Nuesse, Theresa
name: Schlueter, Anne
name: Lemke, Ulrike
name: Holube, Inga
Publisher: name: Taylor & Francis
Year: 2021
Subjects: subject: Biophysics
subject: Medicine
subject: Physiology
subject: FOS: Biological sciences
subject: Biotechnology
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences

description: The aim of this study was to predict outcomes of the HHI questionnaire (Hearing Handicap Inventory) using individual variables beyond pure-tone hearing thresholds. An extensive health-related test battery was applied including a general anamnesis, questionnaires, audiological measures, examination of visual acuity, balance, and cognition, as well as tactile- and motor skills. Based on the self-assessment of health variables and different sensory and cognitive performance measures, a frailty index was calculated to describe the health status of the participants. A stepwise linear regression analysis was conducted to predict HHI scores. A mixed sample (N = 212) of 55- to 81-year-old, participants with different hearing and aiding status completed the test battery. The regression analysis showed statistically significant contributions of pure-tone hearing thresholds, speech recognition in noise, age, frailty, mental health, and the willingness to use hearing aids on HHIE outcomes. Self-reported hearing handicap assessed with the HHI questionnaire reflects various individual variables additionally to pure-tone hearing loss and speech recognition in noise. It is necessary to be aware of the influences of age and health-related variables on HHI scores when using it in research as well as in clinical settings.
Nonequilibrium Energy Transduction in Stochastic Strongly Coupled Rotary Motors
Creators: name: Lathouwers, Emma
name: Lucero, Joseph N. E.
name: Sivak, David A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Physical sciences

description: Living systems at the molecular scale are composed of many constituents with strong and heterogeneous interactions, operating far from equilibrium, and subject to strong fluctuations. These conditions pose significant challenges to efficient, precise, and rapid free energy transduction, yet nature has evolved numerous molecular machines that do just this. Using a simple model of the ingenious rotary machine FoF1-ATP synthase, we investigate the interplay between nonequilibrium driving forces, thermal fluctuations, and interactions between strongly coupled subsystems. This model reveals design principles for effective free energy transduction. Most notably, while tight coupling is intuitively appealing, we find that output power is maximized at intermediate-strength coupling, which permits lubrication by stochastic fluctuations with only minimal slippage.
description: 17 pages, 12 figures. J. Phys. Chem. Lett., 2020
A characterization of Blaschke addition
Creators: name: Gardner, Richard J.
name: Parapatits, Lukas
name: Schuster, Franz E.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Metric Geometry (math.MG)
subject: FOS: Mathematics
subject: Primary: 52A20, 52A30, secondary: 52A39, 52A41

description: A characterization of Blaschke addition as a map between origin-symmetric convex bodies is established. This results from a new characterization of Minkowski addition as a map between origin-symmetric zonoids, combined with the use of Lévy-Prokhorov metrics. A full set of examples is provided that show the results are in a sense the best possible.
Modelling cultural special events management in an Egyptian context
Creators: name: Hamza, Galal
Publisher: name: Cardiff Metropolitan University
Year: 2022
Subjects: Tourism management

description: Since 1992, the Egyptian Ministry of Tourism has established an annual special events agenda to achieve a cluster of social, economic and political aims. Over a ten-year period, the special events involved have not demonstrated clear success; a situation partly attributed to managerial problems and the lack of a good practice model of special events management applicable to the Egyptian context. Thus, this study focuses upon developing a model for managing cultural special events, which is potentially applicable in an Egyptian context. The issues related to special event managements were examined via an extensive literature review, which culminated in the development of a theoretical model of special events management. The theoretical model was then used as a projective instrument to stimulate the presentation of a multiple case study of three Welsh cultural special events. Utilizing semi-structured interviews, the Welsh cases resulted in three reasonably similar managerial models, which were then unified in a Welsh best practice model through the use of the Delphi technique. Three Egyptian cultural special events were analysed, via document analysis, which enabled the exploration of the managerial models currently applied to these cultural special events. The three Egyptian models were then compared against the Welsh best practice model resulting in the identification of eight dissimilarities. Following discussions with Egyptian practitioners, via semi-structured interviews, these dissimilarities were reduced to six managerial problems to which the failure of some of the Egyptian events can be attributed: the absence of SMART objectives; the absence of initial financial study; the unjustified decision-making regarding launching special events; the insufficient lead-time for the planning activities, notably promotion the absence of market research; and the absence of outcome evaluation. Consequently, a theoretical guide for managing these six problem areas was developed out of the literature. Semi-structured interviews with the Welsh practitioners were utilized again leading to the development of the theoretical guide into a Welsh best practice guide. Finally, both the Welsh best practice model and guide were discussed with the Egyptian practitioners, via semi-structured interviews associated with the Delphi technique, resulting in the development of a suggested model and guide potentially applicable in an Egyptian context.
The Lax Equation and Weak Regularity of Asymptotic Estimate Lie Groups
Creators: name: Hanusch, Maximilian
Publisher: name: arXiv
Year: 2020
Subjects: subject: Functional Analysis (math.FA)
subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 22E65, 22E25, 22E15

description: We investigate the Lax equation in the context of infinite-dimensional Lie algebras. Explicit solutions are discussed in the sequentially complete asymptotic estimate context, and an integral expansion (sums of iterated Riemann integrals over nested commutators with correction term) is derived for the situation that the Lie algebra is inherited by an infinite-dimensional Lie group in Milnor's sense. In the context of Banach Lie groups (and Lie groups with suitable regularity properties), we generalize the Baker-Campbell-Dynkin-Hausdorff formula to the product integral (with additional nilpotency assumption in the non-Banach case). We combine this formula with the results obtained for the Lax equation to derive an explicit representation of the product integral in terms of the exponential map. An important ingredient in the non-Banach case is an integral transformation that we introduce. This transformation maps continuous Lie algebra-valued curves to smooth ones and leaves the product integral invariant. This transformation is also used to prove a regularity statement in the asymptotic estimate context.
description: 71 pages. Version as published in Annals of Global Analysis and Geometry
Linear response of tripartite entanglement to infinitesimal noise
Creators: name: Zhang, Fu-Lin
name: Chen, Jing-Ling
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Recent experimental progress in prolonging the coherence time of a quantum system prompts us to explore the behavior of quantum entanglement at the beginning of the decoherence process. The response of the entanglement under an infinitesimal noise can serve as a signature of the robustness of entangled states. A crucial problem of this topic in multipartite systems is to compute the degree of entanglement in a mixed state. We find a family of global noise in three-qubit systems, which is composed of four W states. Under its influence, the linear response of the tripartite entanglement of a symmetrical three-qubit pure state is studied. A lower bound of the linear response is found to depend completely on the initial tripartite and bipartite entanglement. This result shows that the decay of tripartite entanglement is hastened by the bipartite one.
description: 5 pages,1 figure. Accepted by Annals of Physics
Toward Full LHC Coverage of Natural Supersymmetry
Creators: name: Evans, Jared A.
name: Kats, Yevgeny
name: Shih, David
name: Strassler, Matthew J.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We argue that combining just a handful of searches for new physics at Run I of the LHC is sufficient to exclude most supersymmetric extensions of the Standard Model in which the gluino is kinematically accessible and the spectrum is natural. Such models typically give rise to significant MET, top quarks and/or high object multiplicity, and we show that having even one of these signatures generally results in stringent limits. We also identify, among models that lack these signatures, the few gaps in coverage remaining, and propose search strategies to close these gaps. Our results are general and independent of the details of the spectrum, assumptions about minimality, R-parity, etc. Our analysis strategy should remain applicable when the LHC moves to higher energy. Central to our argument are ATLAS and CMS searches for many jets and low MET, a proposed lepton + many jets search, an ATLAS search for 6-7 high-pT jets, and a reexamination of the control and signal regions of the CMS black hole search.
description: 53 pages, 16 figures, journal version
Plasmon damping rates in Coulomb-coupled two-dimensional layers in a heterostructure
Creators: name: Dahal, Dipendra
name: Gumbs, Godfrey
name: Iurov, Andrii
name: Ting, Chin-Sen
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The Coulomb excitations of charge density oscillation are calculated for a double-layer heterostructure. Specifically, we consider two-dimensional (2D) layers of silicene and graphene on a substrate. From the obtained surface response function, we calculated the plasmon dispersion relations which demonstrate the way in which the Coulomb coupling renormalizes the plasmon frequencies. Additionally, we present a novel result for the damping rates of the plasmons in this Coulomb coupled heterostructure and compare these results as the separation between layers is varied.
description: 11 pages, 8 figures
Low-Lying Excitation Modes of Trapped Dipolar Fermi Gases: From Collisionless to Hydrodynamic Regime
Creators: name: Waechtler, F.
name: Lima, A. R. P.
name: Pelster, A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: By means of the Boltzmann-Vlasov kinetic equation we investigate dynamical properties of a trapped, one-component Fermi gas at zero temperature, featuring the anisotropic and long-range dipole-dipole interaction. To this end, we determine an approximate solution by rescaling both space and momentum variables of the equilibrium distribution, thereby obtaining coupled ordinary differential equations for the corresponding scaling parameters. Based on previous results on how the Fermi sphere is deformed in the hydrodynamic regime of a dipolar Fermi gas, we are able to implement the relaxation-time approximation for the collision integral. Then, we proceed by linearizing the equations of motion around the equilibrium in order to study both the frequencies and the damping of the low-lying excitation modes all the way from the collisionless to the hydrodynamic regime. Our theoretical results are expected to be relevant for understanding current experiments with trapped dipolar Fermi gases.
description: Revised version including referee comments
Motivic homological stability of configuration spaces
Creators: name: Horel, Geoffroy
name: Palmer, Martin
Publisher: name: arXiv
Year: 2020
Subjects: subject: Algebraic Topology (math.AT)
subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 55R80, 14F42

description: We prove that some of the classical homological stability results for configuration spaces of points in manifolds can be lifted to motivic cohomology.
description: 18 pages. Final version, to appear in the Bulletin of the London Mathematical Society
title: Die Spur des Geldes. Mäzene, Förderer und Förderstrukturen der Prähistorischen Archäologie. Sektion der AG Theorie in Zusammenarbeit mit dem Focke-Museum Bremen auf dem 7. Deutschen Archäologiekongress, 5. Oktober 2011 (Bremen)
Creators: name: Perschke, Reena
Publisher: name: University Library Heidelberg
Year: 2014

description: [nicht vorhanden]
Bounds on entanglement assisted source-channel coding via the Lovasz theta number and its variants
Creators: name: Cubitt, Toby
name: Mancinska, Laura
name: Roberson, David
name: Severini, Simone
name: Stahlke, Dan
name: Winter, Andreas
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: Combinatorics (math.CO)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We study zero-error entanglement assisted source-channel coding (communication in the presence of side information). Adapting a technique of Beigi, we show that such coding requires existence of a set of vectors satisfying orthogonality conditions related to suitably defined graphs $G$ and $H$. Such vectors exist if and only if $\vartheta(\overline{G}) \le \vartheta(\overline{H})$ where $\vartheta$ represents the Lovász number. We also obtain similar inequalities for the related Schrijver $\vartheta^-$ and Szegedy $\vartheta^+$ numbers. These inequalities reproduce several known bounds and also lead to new results. We provide a lower bound on the entanglement assisted cost rate. We show that the entanglement assisted independence number is bounded by the Schrijver number: $α^*(G) \le \vartheta^-(G)$. Therefore, we are able to disprove the conjecture that the one-shot entanglement-assisted zero-error capacity is equal to the integer part of the Lovász number. Beigi introduced a quantity $β$ as an upper bound on $α^*$ and posed the question of whether $β(G) = \lfloor \vartheta(G) \rfloor$. We answer this in the affirmative and show that a related quantity is equal to $\lceil \vartheta(G) \rceil$. We show that a quantity $χ_{\textrm{vect}}(G)$ recently introduced in the context of Tsirelson's conjecture is equal to $\lceil \vartheta^+(\overline{G}) \rceil$. In an appendix we investigate multiplicativity properties of Schrijver's and Szegedy's numbers, as well as projective rank.
description: Fixed proof of multiplicativity; more connections to prior work in conclusion; many changes in exposition
On the stability of dust orbits in mean motion resonances with considered perturbation from an interstellar wind
Creators: name: Pastor, P.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Circumstellar dust particles can be captured in a mean motion resonance with a planet and simultaneously be affected by non-gravitational effects. It is possible to describe the secular variations of a particle orbit in the mean motion resonance analytically using averaged resonant equations. We derive the averaged resonant equations from the equations of motion in near-canonical form. The secular variations of the particle orbit depending on the orientation of the orbit in space are taken into account. The averaged resonant equations can be derived/confirmed also from Lagrange's planetary equations. We apply the derived theory to the case when the non-gravitational effects are the Poynting--Robertson effect, the radial stellar wind, and an interstellar wind. The analytical and numerical results obtained are in excellent agreement. We found that the types of orbits correspond to libration centers of the conservative problem. The averaged resonant equations can lead to a system of equations which hold for stationary points in a subset of resonant variables. Using this system we show analytically that for the considered non-gravitational effects, all stationary points should correspond to orbits which are stationary in interplanetary space after an averaging over a synodic period. In an exact resonance, the stationary orbits are stable. The stability is achieved by a periodic repetition of the evolution during the synodic period. Numerical solutions of this system show that there are no stationary orbits for either the exact or non-exact resonances.
description: 36 pages, 11 figures, Accepted for publication in Celestial Mechanics and Dynamical Astronomy
title: Gerda Matejka-Felden. Eine Kunstvermittlerin
Creators: name: Nierhaus, Irene
Publisher: name: University Library Heidelberg
Year: 2014

description: kritische berichte - Zeitschrift für Kunst- und Kulturwissenschaften, Bd. 16, Nr. 1 (1988): kritische berichte, Beginn und Erscheinungsfrequenz: Ausgaben pro Band: 4
2023 Astropy Coordination meeting - running notes
Creators: name: Günther, Hans Moritz
name: Brasseus, Clara
name: Price-Whelan, Adrian
name: Shupe, David
name: Homeier, Derek
name: Vahar, Eero
name: Swinbank, John
name: Bradley, Larry
name: van Kerkwijk, Marten
name: Mumford, Stuart
name: Robitaille, Thomas
name: Aldcroft, Tom
name: Craig, Matt
name: Cruz, Kelle
name: Dencheva, Nadia
name: Donaldson, Tom
name: Jamieson, William
name: Lim, Pay Lian
name: Pickering, Timothy
name: Starkman, Nathaniel
name: Tollerud, Erik
name: Weaver, Benjamin
name: Gee, Wilfred
name: Streicher, Ole
name: Conseil, Simon
Publisher: name: Zenodo
Year: 2023
Subjects: Astropy
coordination meeting
meeting minutes

description: This is a permanent record of the running notes from the 2023 Astropy Coordination meeting.
description: Notes are crowd-sourced, all attendees have been added as authors in essentially random order (but starting with the SOC chair).
Erweiterung der OpenAPC-Infrastruktur im Rahmen von openCost
Creators: name: Bartlewski, Julia
name: Broschinski, Christoph
Publisher: name: Zenodo
Year: 2022
Subjects: Publikationskosten
Kostentransparenz
Metadaten
Harvesting
Open Access

description: Die OpenAPC-Initiative sammelt und veröffentlicht Datensätze über Gebühren für Open-Access-Veröffentlichungen unter einer offenen Datenbanklizenz. Im Kontext des Projekts openCost und des DFG-Förderprogramms Open-Access-Publikationskosten beabsichtigt OpenAPC die Erweiterung seines Metadatenschemas um zusätzliche Kosteninformationen, wie Colour Charges oder Submission Fees, strukturiert und standardisiert erfassen zu können. Bisher erfolgt die Datenmeldung an OpenAPC mittels Dateien im csv-Format per E-Mail oder als pull request über die Plattform GitHub. Zusätzlich beabsichtigt OpenAPC im Rahmen von openCost das Harvesting von Metadaten und Kostendaten auszuweiten. Der Vortrag präsentiert die ersten Ergebnisse und dient als Grundlage für weitere Diskussionen innerhalb der OA-Community.
title: Inhalt
Creators: name: Redaktion, Die
Publisher: name: University Library Heidelberg
Year: 2014

description: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege, Bd. 1, Nr. 3 (1958): Nachrichtenblatt der Denkmalpflege in Baden-Württemberg – Organ der Staatlichen Ämter für Denkmalpflege, Beginn und Erscheinungsfrequenz: Ausgaben pro Band: 4
Anisotropic ultrafast spin/valley dynamics in WTe2 films
Creators: name: Chen, Yequan
name: Chen, Zhendong
name: Chen, Yongda
name: Chen, Liming
name: Ning, Jiai
name: Liu, Bo
name: Zhang, Chunchen
name: Lu, Xianyang
name: Ruan, Xuezhong
name: Liu, Wenqing
name: Wang, Peng
name: Song, Fengqi
name: Zhang, Chunfeng
name: Wang, Fengqiu
name: Wu, Jing
name: He, Liang
name: Wang, Xuefeng
name: Zhang, Rong
name: Xu, Yongbing
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: WTe2 Weyl semimetal hosts the natural broken inversion symmetry and strong spin orbit coupling, making it promising for exotic spin/valley dynamics within a picosecond timescale. Here, we unveil an anisotropic ultrafast spin/valley dynamics in centimeter-scale, single-crystalline Td-WTe2 films using a femtosecond pump-probe technique at room temperature. We observe a transient (~0.8 ps) intra-valley transition and a subsequent polarization duration (~5 ps) during the whole spin/valley relaxation process. Furthermore, the relaxation exhibits the remarkable anisotropy of approximately six-fold and two-fold symmetries due to the intrinsic anisotropy along the crystalline orientation and the extrinsic matrix element effect, respectively. Our results offer a prospect for the ultrafast manipulation of spin/valleytronics in topological quantum materials for dissipationless high-speed spin/valleytronic devices.
description: 21 pages, 4 figures
title: Denkmalpflege an Bauwerken, die besondere Bedeutung im Ortsbild haben
Creators: name: Hesselbacher, Martin
Publisher: name: University Library Heidelberg
Year: 2014

description: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege, Bd. 1, Nr. 3 (1958): Nachrichtenblatt der Denkmalpflege in Baden-Württemberg – Organ der Staatlichen Ämter für Denkmalpflege, Beginn und Erscheinungsfrequenz: Ausgaben pro Band: 4
Mixed Estimates for Degenerate Multilinear Operators Associated to Simplexes
Creators: name: Kesler, Robert
Publisher: name: arXiv
Year: 2013
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics
subject: 47H60, 46G25

description: We prove that the degenerate trilinear operator $C_3^{-1,1,1}$ given by the formula \begin{eqnarray*} C_3^{-1,1,1}(f_1, f_2, f_3)(x)=\int_{x_1 < x_2 < x_3} \hat{f_1}(x_1) \hat{f_2}(x_2) \hat{f_3}(x_3) e^{2πi x (-x_1 + x_2 + x_3)} dx_1dx_2 dx_3 \end{eqnarray*} satisfies the new estimates \begin{eqnarray*} ||C_3^{-1,1,1}(f_1, f_2, f_3)||_{\frac{1}{\frac{1}{p_1}+\frac{1}{p_2}+\frac{1}{p_3}}} \lesssim_{p_1, p_2, p_3} ||\hat{f}_1||_{p^\prime_1} ||f_2||_{p_2}||f_3||_{p_3} \end{eqnarray*} for all $f_1 \in L^{p_1}(\mathbb{R}): \hat{f}_1 \in L^{p_1^\prime}(\mathbb{R}) , f_2 \in L^{p_2}(\mathbb{R})$, and $f_3 \in L^{p_3}(\mathbb{R})$ such that $2
title: Zwei mittelalterliche Madonnenstatuen instand gesetzt
Creators: name: Niester, Heinrich
Publisher: name: University Library Heidelberg
Year: 2014

description: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege, Bd. 1, Nr. 3 (1958): Nachrichtenblatt der Denkmalpflege in Baden-Württemberg – Organ der Staatlichen Ämter für Denkmalpflege, Beginn und Erscheinungsfrequenz: Ausgaben pro Band: 4
Dipole anisotropy in sky brightness and source count distribution in radio NVSS data
Creators: name: Tiwari, Prabhakar
name: Kothari, Rahul
name: Naskar, Abhishek
name: Nadkarni-Ghosh, Sharvari
name: Jain, Pankaj
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We study the dipole anisotropy in number counts and flux density weighted number counts {or sky brightness} in the NRAO VLA Sky Survey (NVSS) data. The dipole anisotropy is expected due to our local motion with respect to the CMBR rest frame. We analyse data with an improved fit to the number density, n(S), as a function of the flux density S, which allows deviation from a pure power law behaviour. We also impose more stringent cuts to remove the contribution due to clustering dipole. In agreement with earlier results, we find that the amplitude of anisotropy is significantly larger in comparison to the prediction based on CMBR measurements. The extracted speed is found to be roughly 3 times the speed corresponding to CMBR. The significance of deviation is smaller, roughly 2 sigma, in comparison to earlier estimates. For the cut, S>30 mJy, the speed is found to be $1110\pm370$ Km/s using the source count analysis. The direction of the dipole anisotropy is found to be approximately in agreement with CMBR. We find that the results are relatively insensitive to the lower as well as upper limit imposed on the flux density. Our results suggest that the Universe is intrinsically anisotropic with the axis of anisotropy axis pointing roughly towards the CMBR dipole direction. Finally we present a method which may allow an independent extraction of the local speed and an intrinsic dipole anisotropy, provided a larger data set becomes available in future.
description: 27 pages, 9 figures, substantially revised version, no change in conclusions, to be published in Astroparticle physics
Isotopic Production Cross Sections in Proton-$^{12}$C Interactions for Energies from 10 MeV/N to 100 GeV/N
Creators: name: Cucinotta, Francis A.
name: Pak, Sungmin
Publisher: name: arXiv
Year: 2022
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Proton interactions with $^{12}$C nuclei are a frequent nuclear interaction leading to secondary radiation in tissues for space radiation and cancer therapy with protons or $^{12}$C beams. The fragmentation of $^{12}$C by protons produces a large number of heavy ion (A>4) target or projectile fragments often with high ionization density. Here we develop an analytical model of energy dependent proton-$^{12}$C cross sections for isotopic nuclei production. Using experimental data and a 2nd order optical model an accurate formula for the p-$^{12}$C absorption cross section from <10 MeV/n to >10 GeV/N is obtained. The energy dependence of the elemental and isotopic cross sections is modeled as multiplicities scaled to absorption cross section with average isotopic fractions estimated from experimental data. We show that this approach results in an accurate analytic formula model over the full energy range in Hadron therapy and space radiation protection studies.
description: 6 Figures, 2 Tables. arXiv admin note: substantial text overlap with arXiv:2204.10800
title: Der wiederaufgestellte Ölberg an der kath. Pfarrkirche zu Lauda
Creators: name: Niester, Heinrich
Publisher: name: University Library Heidelberg
Year: 2014

description: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege, Bd. 2, Nr. 1 (1959): Nachrichtenblatt der Denkmalpflege in Baden-Württemberg – Organ der Staatlichen Ämter für Denkmalpflege, Beginn und Erscheinungsfrequenz: Ausgaben pro Band: 4
The impact of acute and chronic exercise on the psychophysiological responses to real-life and cognitive stressors
Creators: name: Wasley, David
Publisher: name: Cardiff Metropolitan University
Year: 2022
Subjects: Psychophysiology

description: Heightened stress responses may be linked to the pathogenesis of various cardiovascular diseases. Individuals who are fitter and more physically active or have just completed an acute bout of exercise are proposed to have an attenuated cardiovascular stressor response. However, research to date utilises mainly laboratory-based stressorsand there is a paucity of research investigating real-life stressors. Three studies were conducted to examine these relationships.Firstly, current fitness and physical activity levels and musicians' (n:58)psychological and physiological responses to musical performance (real-life stressor) and cognitive laboratory stressors were examined. Results showed that fitness was positively related to heart rate reactivity pre-real-life stressor but inversely related to absolute heartrate during a cognitive laboratory stressor. Physical activity was not related to any of the psychological or physiological measures pre- or during a real-life or laboratory stressor. Fitter individuals in this sample did not show a differentiated pattern of heart ratevariability response prior to a real-life stressor.Secondly, the effect of l6 weeks of aerobic training (n:12) on psychological andphysiological responses to a musical performance and a cognitive laboratory stressor were examined, and compared to an Alexander Technique group (n:9). Aerobic training resulted in lower heart rate during the real-life stressor compared to the AlexanderTraining.Finally, the effect of 20 min of exercise (70% YO2.u*) ot psychological andphysiological indices pre-stressor were compared to no exercise (n:12) in a within-subject random crossover design. Patterns of heart rate, blood pressure and heart ratevariability were similar for both conditions.Overall these results provide mixed evidence on the benefits of exercise, fitness and physical activity in altering individuals' responses to stressors. The use of musical performance as a real-life stressor is generally supported, but differences are noted between study conditions suggesting that study design needs careful consideration when working with real-life stressors.
title: Grabplattenfunde bei der Renovierung der evang. Stadtkirche zu Mosbach
Creators: name: Huth, Hans
Publisher: name: University Library Heidelberg
Year: 2014

description: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege, Bd. 2, Nr. 1 (1959): Nachrichtenblatt der Denkmalpflege in Baden-Württemberg – Organ der Staatlichen Ämter für Denkmalpflege, Beginn und Erscheinungsfrequenz: Ausgaben pro Band: 4
Explicit spacetime-symmetry breaking and the dynamics of primordial fields
Creators: name: Nilsson, Nils A.
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We study the effects of explicit spacetime-symmetry breaking on primordial tensor fluctuations using an effective-field theory for Lorentz/CPT violation. We find that the graviton is still massless, but that the propagation speed of tensor modes is modified, and we obtain a constraint on the coefficient determining the symmetry breaking on the order of $10^{-15}$ from the recent measurements of the speed of gravity. Due to the symmetry breaking, the de-Sitter phase is modified, and during this inflationary epoch, the power spectrum assumes a slow oscillation around the general-relativity limit; further, we find that the primordial tensor power spectrum retains its scale invariance, but that the amplitude is modified. We also find that the modes which become subhorizon during radiation domination acquire a phase shift proportional to the coefficient for Lorentz violation.
description: Significant revision and changes to results. 9 pages, 5 figures, matches published version
Heterodyne Spectroscopy of Polariton Spinor Interactions
Creators: name: Takemura, Naotomo
name: Trebaol, Stéphane
name: Wouters, Michiel
name: Portella-Oberli, Marcia T.
name: Deveaud, Benoît
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We report on spinor polariton interactions in GaAs based microcavities. This investigation is carried out by means of heterodyne polarized pump-probe spectroscopy. We show the dependence of the energy renormalization of the lower and upper polariton resonances with cavity detuning for different polariton densities. We use the exciton-photon based Gross-Pitaevskii equation to model the experiment for both lower and upper polariton modes. The theoretical results reproduce qualitatively the experimental observations revealing the magnitude and the sign of the parallel and anti-parallel spin interaction strength. We evidence the strong influence of the biexciton resonance on the anti-parallel spin polariton energy shift and provide the exciton-biexciton coupling constant. We derive our results in the lower polariton basis using Gross-Pitaevskii equation from which, we express analytically the spinor polariton interactions and identify the clear role of the biexciton resonance.
Set-based state estimation and fault diagnosis of linear discrete-time descriptor systems using constrained zonotopes
Creators: name: Rego, Brenner S.
name: Raimondo, Davide M.
name: Raffo, Guilherme V.
Publisher: name: arXiv
Year: 2020
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: This paper presents new methods for set-valued state estimation and active fault diagnosis of linear descriptor systems. The algorithms are based on constrained zonotopes, a generalization of zonotopes capable of describing strongly asymmetric convex sets, while retaining the computational advantages of zonotopes. Additionally, unlike other set representations like intervals, zonotopes, ellipsoids, paralletopes, among others, linear static constraints on the state variables, typical of descriptor systems, can be directly incorporated in the mathematical description of constrained zonotopes. Therefore, the proposed methods lead to more accurate results in state estimation in comparison to existing methods based on the previous sets without requiring rank assumptions on the structure of the descriptor system and with a fair trade-off between accuracy and efficiency. These advantages are highlighted in two numerical examples.
description: This paper was accepted and presented in the 1st IFAC Virtual World Congress, 2020