cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Slow Complexification
Creators: name: McInnes, Brett
Publisher: name: arXiv
Year: 2023
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: The fact that AdS black hole interior geometries are time-dependent presents two challenges: first, to holographic duality (the boundary matter tends to equilibrate, often very quickly), and, second, to the idea that wormholes can be traversable (the wormhole geometry is dynamic, and the wormhole is apt to collapse too quickly for traversal to be possible). As is well known, the first puzzle can be addressed by considering the quantum circuit complexity of the strongly coupled boundary matter, which can continue to grow long after equilibrium is established. We show that data from a phenomenological model of the Quark-Gluon Plasma indicate the existence of an upper bound on the rate of increase of the (specific) complexity, in agreement with a simple holographic model. We then point out that, in this model, this upper bound becomes stricter if angular momentum is added to the bulk black hole while fixing the temperature (at any value, so the black hole is \emph{not} near-extremal). We show that the dual phenomenon, a dramatic slowing of the black hole interior dynamics at high specific angular momentum, also occurs. We conjecture that sufficiently slow complexification of the field theories dual to rotating black holes is associated with traversability of the bulk wormhole, when quantum effects are taken into account.
description: 23 pages, 4 figures, references added, some discussions simplified, added a discussion of the possible relation of complexity with quantum teleportation. Version to appear in Nuclear Physics B
Perturbation theory approach for the power spectrum: from dark matter in real space to massive haloes in redshift space
Creators: name: Gil-Marín, Héctor
name: Wagner, Christian
name: Verde, Licia
name: Porciani, Cristiano
name: Jimenez, Raul
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We investigate the accuracy of Eulerian perturbation theory for describing the matter and galaxy power spectra in real and redshift space in light of future observational probes for precision cosmology. Comparing the analytical results with a large suite of N-body simulations (160 independent boxes of 13.8 (Gpc/h)^3 volume each, which are publicly available), we find that re-summing terms in the standard perturbative approach predicts the real-space matter power spectrum with an accuracy of < 2% for k < 0.20 h/Mpc at redshifts z < 1.5. This is obtained following the widespread technique of writing the resummed propagator in terms of 1-loop contributions. We show that the accuracy of this scheme increases by considering higher-order terms in the resummed propagator. By combining resummed perturbation theories with several models for the mappings from real to redshift space discussed in the literature, the multipoles of the dark-matter power spectrum can be described with sub-percent deviations from N-body results for k < 0.15h/Mpc at z < 1. As a consequence, the logarithmic growth rate, f, can be recovered with sub-percent accuracy on these scales. Extending the models to massive dark-matter haloes in redshift space, our results describe the monopole term from N-body data within 2% accuracy for scales k < 0.15 h/Mpc at z < 0.5; here f can be recovered within < 5% when the halo bias is known. We conclude that these techniques are suitable to extract cosmological information from future galaxy surveys.
description: 33 pages, 11 figures. Published in JCAP
Comment on "Self-doping effects in cobalt silicide CoSi: Electrical, magnetic, elastic, and thermodynamic properties"
Creators: name: Narozhnyi, V. N.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: In this Comment it is argued that Stishov et al. [Phys. Rev. B 86, 064433 (2012)] incorrectly estimated concentrations of (supposed) paramagnetic centers with μ_eff = 4.8μ_B in the investigated CoSi crystals. Correct estimation gives concentrations of such centers from 25 to 50 times smaller than reported (appr. 0.04 to 0.16% instead of appr. 2 to 4%). Also the reported data on temperature dependence of resistivity ρ(T) of four CoSi crystals prepared in different Labs are so close to each other at T = 250 to 300K that it is extremely unlikely to be reproducible for any reasonable accuracy of resistivity measurements. These and some other problems of the paper are related to the key points of the authors argumentation. As a result their main conclusions become unjustified.
description: 3 pages, 1 figure. Current version (modified in accord with referee's recommendations)
The algebraic dynamics of generic endomorphisms of P^n
Creators: name: Fakhruddin, Najmuddin
Publisher: name: arXiv
Year: 2012
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics

description: We investigate some general questions in algebraic dynamics in the case of generic endomorphisms of projective spaces over a field of characteristic zero. The main results that we prove are that a generic endomorphism has no non-trivial preperiodic subvarieties, any infinite set of preperiodic points is Zariski dense and any infinite subset of a single orbit is also Zariski dense, thereby verifying the dynamical "Manin--Mumford" conjecture of Zhang and the dynamical "Mordell--Lang" conjecture of Denis and Ghioca--Tucker in this case.
description: Some details added, results are the same. Final version to appear in Algebra and Number Theory
La diplomatique française du haut Moyen Âge. Inventaire des chartes originales antérieures à 1121 conservées en France, sous la direction de B.-M. Tock par M. Courtois et M.-J. Gasse-Grandjean avec la collaboration de Ph. Demonty, 2 tomes, 2001
Creators: name: Erkens, Franz-Reiner
Publisher: name: Francia
Year: 2019

description: Francia, Bd. 30 Nr. 1 (2003)
Discovery of a Low-Redshift Hot Dust-Obscured Galaxy
Creators: name: Li, Guodong
name: Tsai, Chao-Wei
name: Stern, Daniel
name: Wu, Jingwen
name: Assef, Roberto J.
name: Blain, Andrew W.
name: Díaz-Santos, Tanio
name: Eisenhardt, Peter R. M.
name: Griffith, Roger L.
name: Jarrett, Thomas H.
name: Jun, Hyunsung D.
name: Lake, Sean E.
name: Saade, M. Lynne
Publisher: name: arXiv
Year: 2023
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We report the discovery of the hyperluminous, highly obscured AGN WISE J190445.04+485308.9 (W1904+4853 hereafter, $L_{bol} = 1.1 \times 10^{13} \ L_{\odot}$) at z=0.415. Its well-sampled spectral energy distribution (SED) is dominated by infrared dust emission, though broad emission lines are detected in the optical spectra. These features suggest that W1904+4853 contains an actively accreting supermassive black hole hidden in its dusty cocoon, resembling the observed properties of Hot Dust-Obscured Galaxies (Hot DOGs), a population previously only identified at z>1.0. Using the broad component of the MgII emission line, we estimate a black hole mass of $log \ (M_{BH}/M_{\odot}) = 8.4 \pm 0.4$. The corresponding Eddington ratio of 1.4 implies that the central black hole accretion is at the theoretical limit of isotropic accretion. The rest-frame UV-optical SED also indicates that the host galaxy of W1904+4853 harbors strong star formation activity at the rate of $6-84 \ M_{\odot} \ \rm{yr^{-1}}$ with an independent estimate of SFR up to $\sim 45 \ M_{\odot} \ \rm{yr^{-1}}$ using the [O II] emission line. With an estimated stellar mass of $3 \times 10^{10} \ M_{\odot}$, the host galaxy appears to be a starburst system with respect to the main sequence of the star-forming galaxies at the same redshift. Although blueshifted and asymmetric [O III] emission provides evidence of an outflow, we estimate it to be an order of magnitude smaller than the star formation rate, indicating that the current obscured AGN activity at the center has not yet produced significant feedback on the host galaxy star formation activity. W1904+4853 supports the interpretation that Hot DOGs are a rare transitional phase of AGN accretion in galaxy evolution, a phase that can persist into the present-day Universe.
description: 19 pages, 6 figures. Accepted for publication in The Astrophysical Journal
The strongest gravitational lenses: II. Is the large Einstein radius of MACS J0717.5+3745 in conflict with LCDM?
Creators: name: Waizmann, Jean-Claude
name: Redlich, Matthias
name: Bartelmann, Matthias
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Can the standard cosmological model be questioned on the basis of a single observed extreme galaxy cluster? Usually, the word extreme refers directly to cluster mass, which is not a direct observable and thus subject to substantial uncertainty. Hence, it is desirable to extend studies of extreme clusters to direct observables, such as the Einstein radius (ER). We aim to evaluate the occurrence probability of the large observed ER of MACS J0717.5 within the standard LCDM cosmology. In particular, we want to model the distribution function of the single largest ER in a given cosmological volume and to study which underlying assumptions and effects have the strongest impact on the results. We obtain this distribution by a Monte Carlo approach, based on the semi-analytic modelling of the halo population on the past lightcone. After sampling the distribution, we fit the results with the general extreme value (GEV) distribution which we use for the subsequent analysis. We find that the distribution of the maximum ER is particularly sensitive to the precise choice of the halo mass function, lens triaxiality, the inner slope of the halo density profile and the mass-concentration relation. Using the distributions so obtained,we study the occurrence probability of the large ER of MACS J0717.5, finding that this system is not in tension with LCDM. We also find that the GEV distribution can be used to fit very accurately the sampled distributions and that all of them can be described by a Frechet distribution. With a multitude of effects that strongly influence the distribution of the single largest ER, it is more than doubtful that the standard LCDM cosmology can be ruled out on the basis of a single observation. If, despite the large uncertainties in the underlying assumptions, one wanted to do so, a much larger ER (> 100 arcsec) than that of MACS J0717.5 would have to be observed.
description: 15 pages, 11 figures, accepted for publication in Astronomy and Astrophysics, minor corrections to match the accepted version, added discussion of the distribution of the largest Einstein radii for the MACS survey area, extended Fig. 9
Effect of electron-beam energy chirp on signatures of radiation reaction in laser-based experiments
Creators: name: Magnusson, J.
name: Blackburn, T. G.
name: Gerstmayr, E.
name: Los, E. E.
name: Marklund, M.
name: Ridgers, C. P.
name: Mangles, S. P. D.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: Accelerator Physics (physics.acc-ph)
subject: FOS: Physical sciences

description: Current experiments investigating radiation reaction employ high energy electron beams together with tightly focused laser pulses in order to reach the quantum regime, as expressed through the quantum nonlinearity parameter $χ$. Such experiments are often complicated by the large number of latent variables, including the precise structure of the electron bunch. Here we examine a correlation between the electron spatial and energy distributions, called an energy chirp, investigate its significance to the laser-electron beam interaction and show that the resulting effect cannot be trivially ignored when analysing current experiments. In particular, we show that the energy chirp has a large effect on the second moment of the electron energy, but a lesser impact on the first electron energy moment or the photon critical energy. These results show the importance of improved characterisation and control over electron bunch parameters on a shot-to-shot basis in such experiments.
description: 8 pages, 8 figures
title: Moroccan recommendations for the management of post-menopausal osteoporosis
title: Recommandations Marocaines pour la prise en charge de l'ostéoporose post-ménopausique
Creators: name: Mirieme Ghazi
Publisher: name: Revue Marocaine de Rhumatologie (RMR)
Year: 2023
Subjects: Ostéoporose post-ménopausique; Recommandations; Société Marocaine de Rhumatologie; Densitométrie osseuse.

description: We propose an update of the Moroccan recommendations for the management of postmenopausal osteoporosis, based on the latest international recommendations. The steering committee established the main items approached in these recommendations. The content was discussed and validated by a multidisciplinary working group. A reading group was consulted to validate the final version of the recommendations. The Delphi method was used (4 rounds) to obtain a consensus on 17 recommendations concerning the diagnosis of osteoporosis, the evaluation and stratification of fracture risk, and treatment. Finally, we suggest an algorithm for the management of postmenopausal osteoporosis according to the level of fracture risk.
description: Nous proposons une actualisation des recommandations marocaines pour la prise en charge de l'ostéoporose post-ménopausique, inspirée des dernières recommandations internationales. Le comité de pilotage a établi les principaux thèmes abordés dans ces recommandations. Leur contenu a été discuté et validé par un groupe de travail multidisciplinaire. Un groupe de lecture a été consulté pour la validation de la version finale des recommandations. La méthode Delphi a été mise en place (4 tours) pour obtenir un consensus sur 17 recommandations concernant le diagnostic de l’ostéoporose, l’évaluation et la stratification du risque fracturaire et le traitement. Enfin, nous suggérons un algorithme pour la prise en charge de l'ostéoporose post-ménopausique en fonction du niveau du risque de fracture
Minimal Radiative Neutrino Mass Mechanism for Inverse Seesaw Models
Creators: name: Dev, P. S. Bhupal
name: Pilaftsis, Apostolos
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study a minimal one-loop radiative mechanism for generating small Majorana neutrino masses in inverse seesaw extensions of the Standard Model with two singlet fermions per family. The new feature of this radiative mechanism is that the one-loop induced left-handed neutrino mass matrix is directly proportional to the Majorana mass matrix of the right-handed neutrinos. This is a very economical scenario without necessitating the existence of non-standard scalar or gauge fields.
description: 9 pages, 6 figures; matches published version
NISQ-compatible approximate quantum algorithm for unconstrained and constrained discrete optimization
Creators: name: Perelshtein, M. R.
name: Pakhomchik, A. I.
name: Melnikov, Ar. A.
name: Podobrii, M.
name: Termanova, A.
name: Kreidich, I.
name: Nuriev, B.
name: Iudin, S.
name: Mansell, C. W.
name: Vinokur, V. M.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: Optimization and Control (math.OC)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: Quantum algorithms are getting extremely popular due to their potential to significantly outperform classical algorithms. Yet, applying quantum algorithms to optimization problems meets challenges related to the efficiency of quantum algorithms training, the shape of their cost landscape, the accuracy of their output, and their ability to scale to large-size problems. Here, we present an approximate gradient-based quantum algorithm for hardware-efficient circuits with amplitude encoding. We show how simple linear constraints can be directly incorporated into the circuit without additional modification of the objective function with penalty terms. We employ numerical simulations to test it on MaxCut problems with complete weighted graphs with thousands of nodes and run the algorithm on a superconducting quantum processor. We find that for unconstrained MaxCut problems with more than 1000 nodes, the hybrid approach combining our algorithm with a classical solver called CPLEX can find a better solution than CPLEX alone. This demonstrates that hybrid optimization is one of the leading use cases for modern quantum devices.
description: Accepted for publication in Quantum
Terahertz Circular Dichroism in Commensurate Twisted Bilayer Graphene
Creators: name: Talkington, Spenser
name: Mele, Eugene J.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We report calculations of terahertz ellipticities in large-angle, 21.79$^\circ$ and 38.21$^\circ$, commensurate twisted bilayer graphene, and predict values as high as 1.5 millidegrees in the terahertz region for this non-magnetic material. This terahertz circular dichroism exhibits a magnitude comparable to that of chiral materials in the visible region. At low frequencies, the dichroic response is mediated by strong interlayer hybridization, which allows us to probe the symmetry and strength of these couplings. Crucially, lateral interlayer translation tunes this response, in contrast to small twist angle bilayer graphene's near invariance under under interlayer translation. We examine the magnitude and phase of the interlayer coupling for all structures containing fewer than 400 atoms per unit cell. Finally, we find that the dichroism can be manipulated by applying an electric field or with doping.
description: 9 pages, 7 figures
Harvesting-Strategien - Erfahrungen bei BASE und OpenAIRE
Creators: name: Czerniak, Andreas
name: Peil, Vitali
Publisher: name: Kolloquium Wissensinfrastruktur
Year: 2023

description: Ende des letzten Jahrtausends setzte sich die Erkenntnis durch, dass wissenschaftliche Dokumente, die bereits in Archiven verfügbar waren, in standardisierter Form über das Internet ausgetauscht werden sollten. Aus dieser Erkenntnis hat sich ein Standard für die Bereitstellung von Metadaten bei Archiven und Repositorien entwickelt, der weit verbreitet und noch immer im Einsatz ist. Auf der Grundlage dieses Standards haben Aggregatoren damit begonnen, Metadaten aus Repositorien und Forschungsinformationssystemen (FIS) automatisch zu sammeln und sie der wissenschaftlichen Gemeinschaft über Suchplattformen zur Verfügung zu stellen. Der Vortrag gibt einen Einblick in die Strategien zum Einsammeln von Metadaten aus Repositorien, FIS und Publikationsplattformen in großem Maßstab, basierend auf den Erfahrungen von BASE und OpenAIRE. Dabei werden alltägliche Probleme exemplarisch erörtert und abschließend ein möglicher Ausblick gegeben.
description: Kolloquium Wissensinfrastruktur, Sommersemester 2023
Berry Curvature Spectroscopy from Bloch Oscillations
Creators: name: De Beule, Christophe
name: Mele, E. J.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Artificial crystals such as moiré superlattices can have a real-space periodicity much larger than the underlying atomic scale. This facilitates the presence of Bloch oscillations in the presence of a static electric field. We demonstrate that the optical response of such a system, when dressed with a static field, becomes resonant at the frequencies of Bloch oscillations, which are in the terahertz regime when the lattice constant is of the order of 10 nm. In particular, we show within a semiclassical band-projected theory that resonances in the dressed Hall conductivity are proportional to the lattice Fourier components of the Berry curvature. We illustrate our results with a low-energy model on an effective honeycomb lattice.
description: 6 + 4 pages, 3 figures. Published version
Radiation processes in the vicinity of non-Schwarzschild and non-Kerr black holes
Creators: name: Konoplya, R. A.
name: Zhidenko, A.
Publisher: name: arXiv
Year: 2012
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Usually alternative theories of gravity imply deviations from the well-known Kerr space-time, a model of an isolated black hole in General Relativity. In the dominant order, the deformed Kerr metric, free of closed time-like curves outside the event horizon, has been suggested recently by Johannsen and Psaltis. It has a single deformation parameter which is not constrained by the current observations, allowing, thereby, for a kind of unified and simple phenomenological description of black holes in various theories of gravity. Here we consider a number of classical and quantum phenomena of radiation in the vicinity of such deformed Schwarzschild-like and Kerr-like black holes: spiralling of particles into black holes, decay of fields propagating in the black hole's background, Hawking radiation. In particular, we calculate some quantitative characteristics of the above phenomena, such as the binding energy of particles, quasinormal modes, late-time tails of fields of various spin, intensity of Hawking radiation. The binding energy released when a particle goes over from a given stable orbit in the equatorial plane to the innermost stable one is calculated for such non-Kerr black holes. Due to inseparability of the wave equations in the general case, the perturbations and stability of scalar, Dirac, and electromagnetic fields are analyzed for vanishing rotation only. The dependence of the radiation phenomena on the deformation parameter is discussed.
description: 12 pages, 5 figures
J. Fried, Otto III. und Boleslaw Chrobry. Das Widmungsbild des Aachener Evangeliars, der »Akt von Gnesen« und das frühe polnische und ungarische Königtum, 2001
Creators: name: Michalowski, Roman
Publisher: name: Francia
Year: 2019

description: Francia, Bd. 30 Nr. 1 (2003)
The Fengqiao Experience: How China Relieves Its Police Officers of Pressures from the COVID-19 Pandemic
Creators: name: Liu, Hongsong
name: Xu, Yue
Publisher: name: International Journal of Conflict and Violence (IJCV)
Year: 2023

description: Police officers worldwide have encountered significant challenges during the COVID-19 pandemic, including a lack of protective equipment, overwork, and the legality of emergency policing. This study explores how police officers in China have responded to public emergencies during the pandemic, using a comprehensive and multi-channel method of data collection and analysis. The primary and secondary data were obtained from questionnaires (N=713), semi-structured interviews (N=30), and official reports. The “Fengqiao Experience” demonstrates how China relieves pressure on police officers during the pandemic in both the short and long run. The experimental practices of Fengqiao, including material support and training mechanisms, non-contact law enforcement, intelligent analysis combined with big data, grid-based governance, and joint defense mechanisms, prove to be effective. Fighting the COVID-19 pandemic is not only a test for the national governance system and its capabilities but also an opportunity to promote its modernization.
description: International Journal of Conflict and Violence (IJCV), Bd. 17 (2023)
Indiscernibles, EM-types, and Ramsey Classes of Trees
Creators: name: Scow, Lynn
Publisher: name: arXiv
Year: 2012
Subjects: subject: Logic (math.LO)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 03C52, 05C55

description: It was shown in \cite{sc12} that for a certain class of structures $\I$, $\I$-indexed indiscernible sets have the modeling property just in case the age of $\I$ is a Ramsey class. We expand this known class of structures from ordered structures in a finite relational language to ordered, locally finite structures which isolate quantifier-free types by way of quantifier-free formulas. As a corollary, we may conclude that certain classes of finite trees are Ramsey, some previously known. See updated paper for new references.
description: (accepted)
Differential forms and k-Minkowski spacetime from extended twist
Creators: name: Jurić, Tajron
name: Meljanac, Stjepan
name: Štrajn, Rina
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We analyze bicovariant differential calculus on $κ$-Minkowski spacetime. It is shown that corresponding Lorentz generators and noncommutative coordinates compatible with bicovariant calculus cannot be realized in terms of commutative coordinates and momenta. Furthermore, $κ$-Minkowski space and NC forms are constructed by twist related to a bicrossproduct basis. It is pointed out that the consistency condition is not satisfied. We present the construction of $κ$-deformed coordinates and forms (super-Heisenberg algebra) using extended twist. It is compatible with bicovariant differential calculus with $κ$-deformed $\mathfrak{igl}(4)$-Hopf algebra. The extended twist leading to $κ$-Poincaré-Hopf algebra is also discussed.
description: 15 pages, minor typos corrected to match the published version
The far side of the Galactic bar/bulge revealed through semi-regular variables
Creators: name: Hey, Daniel R.
name: Huber, Daniel
name: Shappee, Benjamin J.
name: Bland-Hawthorn, Joss
name: Tepper-García, Thor
name: Sanderson, Robyn
name: Chakrabarti, Sukanya
name: Saunders, Nicholas
name: Hunt, Jason A. S.
name: Bedding, Timothy R.
name: Tonry, John
Publisher: name: arXiv
Year: 2023
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The Galactic bulge and bar are critical to our understanding of the Milky Way. However, due to the lack of reliable stellar distances, the structure and kinematics of the bulge/bar beyond the Galactic center have remained largely unexplored. Here, we present a method to measure distances of luminous red giants using a period-amplitude-luminosity relation anchored to the Large Magellanic Cloud, with random uncertainties of 10-15% and systematic errors below 1-2%. We apply this method to data from the Optical Gravitational Lensing Experiment (OGLE) to measure distances to $190,302$ stars in the Galactic bulge and beyond out to 20 kpc. Using this sample we measure a distance to the Galactic center of $R_0$ = $8108\pm106_{\rm stat}\pm93_{\rm sys}$ pc, consistent with astrometric monitoring of stars orbiting Sgr A*. We cross-match our distance catalog with Gaia DR3 and use the subset of $39,566$ overlapping stars to provide the first constraints on the Milky Way's velocity field ($V_R,V_ϕ,V_z$) beyond the Galactic center. We show that the $V_R$ quadrupole from the bar's near side is reflected with respect to the Galactic center, indicating that the bar is both bi-symmetric and aligned with the inner disk, and therefore dynamically settled along its full extent. We also find that the vertical height $V_Z$ map has no major structure in the region of the Galactic bulge, which is inconsistent with a current episode of bar buckling. Finally, we demonstrate with N-body simulations that distance uncertainty plays a major factor in the alignment of the major and kinematic axes of the bar and distribution of velocities, necessitating caution when interpreting results for distant stars.
description: Accepted to the Astronomical Journal
Why does the Jeans Swindle work?
Creators: name: Falco, M.
name: Hansen, S. H.
name: Wojtak, R.
name: Mamon, G. A.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: When measuring the mass profile of any given cosmological structure through internal kinematics, the distant background density is always ignored. This trick is often refereed to as the "Jeans Swindle". Without this trick a divergent term from the background density renders the mass profile undefined, however, this trick has no formal justification. We show that when one includes the expansion of the Universe in the Jeans equation, a term appears which exactly cancels the divergent term from the background. We thereby establish a formal justification for using the Jeans Swindle.
description: 5 pages, 2 figures, Accepted for publication in MNRAS Letters
title: Interactions of halogens
title: The interactions of halogens
titleType: AlternativeTitle
Creators: name: West, Andrew Mark London
Publisher: name: The University of Edinburgh
Year: 2022
Subjects: halogen bonding
supramolecular chemistry
computational chemistry
physical organic chemistry
bifurcated interactions

description: As an analogue of the ubiquitous hydrogen bond, interest in halogen bonding has garnered interest since the turn of the twenty-first century. The orthogonal nature and occasionally surprising characteristics of halogen bonds (compared to better-understood hydrogen bonds) has seen them find useful application in a wide range of disciplines. Chapter 1 summarises key literature characterising the halogen bond, including the identification of the sigma-hole. The novel character of halogen bonds and the role played by a verity of physiochemical forces are discussed; with an in-depth review of recreant advances pertaining to anti-electrostatic halogen bonds. Other closely related sigma-hole interactions such as chalcogen and pnictogen bonding are also introduced with key similarities and novel characteristics being highlighted. Chapter 2 presents an experimental and theoretical investigation of halogen-arene interactions using molecular torsion balances. Thermodynamic double mutant cycles are used to future dissect the energetics halogen-arene from the background noise. A broad solvent screen reveals the solvent-dependent nature of such dispersion-driven contacts. This is supported by a number of computational experiments that further characterise the various energetic contributions and used to study their angular and geometric dependencies. Chapter 3 examines bifurcated halogen bonds and hydrogen bonds using a combined solution-phase and computational approach. The binding properties of a series of halogen bonded host-guest complexes are compared with hydrogen-bonded analogues. Experimental changes in free energy for the host-guest complexes were determined by 1H NMR titration. Bi- and trifurcated interactions were found to be energetically cooperative, but the nature of said cooperativity differs between hydrogen and halogen bonds. Computational methodologies including SAPT and NBO calculations were used to partition energetic contributions and to rationalise the experimentally observed experimental trends and rationalize the differences between the interaction types.
K. Windschuttle, The Killing of History. How literary critics and social theorists are murdering our past, 2000
Creators: name: Burger, Pierre-François
Publisher: name: Francia
Year: 2019

description: K. Windschuttle, The Killing of History. How literary critics and social theorists are murdering our past, 2000 (P.-F. Burger)
description: Francia, Bd. 30 Nr. 2 (2003)
F. Raynaud, Savoyische Einwanderungen in Deutschland (15. bis 19. Jahrhundert), 2001
Creators: name: Kintz, Jean-Pierre
Publisher: name: Francia
Year: 2019

description: F. Raynaud, Savoyische Einwanderungen in Deutschland (15. bis 19. Jahrhundert), 2001 (J.-P. Kintz)
description: Francia, Bd. 30 Nr. 2 (2003)
Sharp estimates on the first eigenvalue of the p-Laplacian with negative Ricci lower bound
Creators: name: Naber, Aaron
name: Valtorta, Daniele
Publisher: name: arXiv
Year: 2012
Subjects: subject: Differential Geometry (math.DG)
subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 58C40 (Primary) 35P30, 35J15 (Secondary)

description: We complete the picture of sharp eigenvalue estimates for the p-Laplacian on a compact manifold by providing sharp estimates on the first nonzero eigenvalue of the nonlinear operator $Δ_p$ when the Ricci curvature is bounded from below by a negative constant. We assume that the boundary of the manifold is convex, and put Neumann boundary conditions on it. The proof is based on a refined gradient comparison technique and a careful analysis of the underlying model spaces.
description: Sign mistake fixed in the proof of the gradient comparison theorem (theorem 5.1 pag 10), and some minor improvements around
Theory of Change narrative
Creators: name: Action, Jameel Observatory For Food Security Early
Publisher: name: University of Edinburgh Global Academy of Agriculture and Food Security
Year: 2023
Subjects: drylands
climate change
data
pastoralism

description: Short document introducing the theory of change of the The Jameel Observatory for Food Security Early Action - an international partnership led by the University of Edinburgh, with the International Livestock Research Institute, Save the Children UK, the Abdul Latif Jameel Poverty Action Lab and Community Jameel.
FAUST IX. Multi-band, multi-scale dust study of L1527 IRS. Evidence for dust properties variations within the envelope of a Class 0/I YSO
Creators: name: Cacciapuoti, L.
name: Macias, E.
name: Maury, A. J.
name: Chandler, C. J.
name: Sakai, N.
name: Tychoniec, Ł.
name: Viti, S.
name: Natta, A.
name: De Simone, M.
name: Miotello, A.
name: Codella, C.
name: Ceccarelli, C.
name: Podio, L.
name: Fedele, D.
name: Johnstone, D.
name: Shirley, Y.
name: Liu, B. J.
name: Bianchi, E.
name: Zhang, Z. E.
name: Pineda, J.
name: Loinard, L.
name: Ménard, F.
name: Lebreuilly, U.
name: Klessen, R. S.
name: Hennebelle, P.
name: Molinari, S.
name: Testi, L.
name: Yamamoto, S.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Early dust grain growth in protostellar envelopes infalling on young discs has been suggested in recent studies, supporting the hypothesis that dust particles start to agglomerate already during the Class 0/I phase of young stellar objects (YSOs). If this early evolution were confirmed, it would impact the usually assumed initial conditions of planet formation, where only particles with sizes $\lesssim 0.25 μ$m are usually considered for protostellar envelopes. We aim to determine the maximum grain size of the dust population in the envelope of the Class 0/I protostar L1527 IRS, located in the Taurus star-forming region (140 pc). We use Atacama Large millimetre/sub-millimetre Array (ALMA) and Atacama Compact Array (ACA) archival data and present new observations, in an effort to both enhance the signal-to-noise ratio of the faint extended continuum emission and properly account for the compact emission from the inner disc. Using observations performed in four wavelength bands and extending the spatial range of previous studies, we aim to place tight constraints on the spectral ($α$) and dust emissivity ($β$) indices in the envelope of L1527 IRS. We find a rather flat $α\sim$ 3.0 profile in the range 50-2000 au. Accounting for the envelope temperature profile, we derive values for the dust emissivity index, 0.9 < $β$ < 1.6, and reveal a tentative, positive outward gradient. This could be interpreted as a distribution of mainly ISM-like grains at 2000 au, gradually progressing to (sub-)millimetre-sized dust grains in the inner envelope, where at R=300 au, $β$ = 1.1 +/- 0.1. Our study supports a variation of the dust properties in the envelope of L1527 IRS. We discuss how this can be the result of in-situ grain growth, dust differential collapse from the parent core, or upward transport of disc large grains.
description: Accepted for publication in A&A. Contains 18 pages, 21 figures, 5 tables Replacement on Nov 22 to change title number of FAUST series from "X" to "IX."
J. F. Battenberg, Die Juden in Deutschland vom 16. bis zum Ende des 18. Jahrhunderts, 2001
Creators: name: Bourel, Dominique
Publisher: name: Francia
Year: 2019

description: J. F. Battenberg, Die Juden in Deutschland vom 16. bis zum Ende des 18. Jahrhunderts, 2001 (D. Bourel)
description: Francia, Bd. 30 Nr. 2 (2003)
Physical and Stable Closed Timelike Curves
Creators: name: Ho, Chiu Man
name: Weiler, Thomas J.
Publisher: name: arXiv
Year: 2012
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We construct a class of closed timelike curves (CTCs) using a compactified extra dimension $u$. A nonzero metric element $g_{tu}(u)$ enables particles to travel backwards in global time $t$. The compactified dimension guarantees that the geodesic curve closes in $u$. The effective 2D ($t$ and $u$) nature of the metric ensures that spacetime is flat, therein satisfying all the classical stability conditions as expressed by the energy conditions. Finally, stationarity of the metric guarantees that a particle's energy is conserved. The pathologies that plague many hypothesized metrics admitting CTCs, e.g. an infinite cylinder of matter, a negative energy-distribution, particle acceleration/blue-shifting along the CTC, do not occur within our metric class.
description: 7 pages, 2 figures, v2: version to appear in MPLA
A. Oschmann (Hg.), Die Friedensverträge mit Frankreich und Schweden. 1: Urkunden, 1998
Creators: name: Bérenger, Jean
Publisher: name: Francia
Year: 2019

description: A. Oschmann (Hg.), Die Friedensverträge mit Frankreich und Schweden. 1: Urkunden, 1998 (J. Bérenger)
description: Francia, Bd. 30 Nr. 2 (2003)
Efficient Vision Transformer for Human Pose Estimation via Patch Selection
Creators: name: Kinfu, Kaleab A.
name: Vidal, Rene
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: While Convolutional Neural Networks (CNNs) have been widely successful in 2D human pose estimation, Vision Transformers (ViTs) have emerged as a promising alternative to CNNs, boosting state-of-the-art performance. However, the quadratic computational complexity of ViTs has limited their applicability for processing high-resolution images. In this paper, we propose three methods for reducing ViT's computational complexity, which are based on selecting and processing a small number of most informative patches while disregarding others. The first two methods leverage a lightweight pose estimation network to guide the patch selection process, while the third method utilizes a set of learnable joint tokens to ensure that the selected patches contain the most important information about body joints. Experiments across six benchmarks show that our proposed methods achieve a significant reduction in computational complexity, ranging from 30% to 44%, with only a minimal drop in accuracy between 0% and 3.5%.
description: BMVC 2023 Oral Paper: https://proceedings.bmvc2023.org/167/
The Pilot-Wave Perspective on Quantum Scattering and Tunneling
Creators: name: Norsen, Travis
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The de Broglie - Bohm "pilot-wave" theory replaces the paradoxical wave-particle duality of ordinary quantum theory with a more mundane and literal kind of duality: each individual photon or electron comprises a quantum wave (evolving in accordance with the usual quantum mechanical wave equation) and a particle that, under the influence of the wave, traces out a definite trajectory. The definite particle trajectory allows the theory to account for the results of experiments without the usual recourse to additional dynamical axioms about measurements. Instead one need simply assume that particle detectors click when particles arrive at them. This alternative understanding of quantum phenomena is illustrated here for two elementary textbook examples of one-dimensional scattering and tunneling. We introduce a novel approach to reconciling standard textbook calculations (made using unphysical plane-wave states) with the need to treat such phenomena in terms of normalizable wave packets. This allows for a simple but illuminating analysis of the pilot-wave theory's particle trajectories, and an explicit demonstration of the equivalence of the pilot-wave theory predictions with those of ordinary quantum theory.
description: 10 pages, 4 figures
M. Kempe, T. Maissen. Die Collegia der Insulaner, Vertraulichen und Wohlgesinnten in Zürich 1679-1709. Die ersten deutschsprachigen Aufklärungsgesellschaften zwischen Naturwissenschaften, Bibelkritik, Geschichte und Politik, 2002
Creators: name: Hildebrandt, Karl
Publisher: name: Francia
Year: 2019

description: M. Kempe, T. Maissen. Die Collegia der Insulaner, Vertraulichen und Wohlgesinnten in Zürich 1679-1709. Die ersten deutschsprachigen Aufklärungsgesellschaften zwischen Naturwissenschaften, Bibelkritik, Geschichte und Politik, 2002 (K. Hildebrandt)
description: Francia, Bd. 30 Nr. 2 (2003)
E. Badinter, Les passions intellectuelles. II: Exigence de dignité (1751-1762), 2002
Creators: name: Volmer, Annett
Publisher: name: Francia
Year: 2019

description: E. Badinter, Les passions intellectuelles. II: Exigence de dignité (1751-1762), 2002 (A. Volmer)
description: Francia, Bd. 30 Nr. 2 (2003)
Assessment of environmental, economic and technical performance of geopolymer concrete: a case study
Creators: name: Firdous, Rafia
name: Nikravan, Morteza
name: Mancke, Raoul
name: Vöge, Manuel
name: Stephan, Dietmar
Publisher: name: Technische Universität Berlin
Year: 2022
Subjects: subject: 620 Ingenieurwissenschaften und zugeordnete Tätigkeiten
subject: geopolymer concrete
subject: geopolymers
subject: evaluation
subject: industrial precast applications
subject: sustainability

description: Although several studies report the CO2 reduction obtained from alkali-activated materials/geopolymers, only a few investigate their engineering, environmental and economic aspects. The present paper provides an evaluation approach to address these three major aspects of geopolymer concrete by choosing three scenarios for industrial precast applications. Using the analytical hierarchy process, a single sustainability score was determined for three scenarios using technical, environmental and economic parameters. Such sustainability sensitivity analysis led to decision-making for various scenarios. This case study provides an example of reaching these parameters for choosing suitable concrete mixtures for a given application or requirements. The technical and environmental results showed that a wide range of late and early age compressive strength could be achieved by changing the mix composition and proportions. However, all the geopolymer concrete samples exhibited a lower environmental footprint than OPC concrete.
O. Briese, Die Macht der Metaphern. Blitz, Erdbeben und Kometen im Gefüge der Aufklärung, 1998
Creators: name: Duranton, Henri
Publisher: name: Francia
Year: 2019

description: O. Briese, Die Macht der Metaphern. Blitz, Erdbeben und Kometen im Gefüge der Aufklärung, 1998 (H. Duranton)
description: Francia, Bd. 30 Nr. 2 (2003)
Evaluating the eutrophication risk of artificial lagoons–case study El Gouna, Egypt
Creators: name: Abouelsaad, Omnia
name: Matta, Elena
name: Hinkelmann, Reinhard
Publisher: name: Technische Universität Berlin
Year: 2022
Subjects: subject: 600 Technik, Medizin, angewandte Wissenschaften::620 Ingenieurwissenschaften::627 Wasserbau
subject: TELEMAC
subject: EUTRO-WAQTEL
subject: water quality
subject: dissolved oxygen
subject: phytoplankton biomass
subject: manmade coastal lagoons
subject: eutrophication

description: Eutrophication problem in El Gouna shallow artificial coastal lagoons in Egypt was investigated using 2D TELEMAC-EUTRO-WAQTEL module. Eight reactive components were presented, among them dissolved oxygen (DO), phosphorus, nitrogen, and phytoplankton biomass (PHY). The effect of warmer surface water on the eutrophication problem was investigated. Also, the spatial and temporal variability of the eutrophication was analyzed considering different weather conditions: tide wave, different wind speeds and directions. Moreover, effect of pollution from a nearby desalination plant was discussed considering different pollution degrees of brine discharge, different discharge quantities and different weather conditions. Finally, new precautions for better water quality were discussed. The results show that tide wave created fluctuations in DO concentrations, while other water quality components were not highly influenced by tide’s fluctuations. Also, it was found that high water temperatures and low wind speeds highly decreased water quality producing low DO concentrations and high nutrients rates. High water quality was produced beside inflow boundaries when compared to outflow boundaries in case of mean wind. Moreover, the results show that the average water quality was not highly deteriorated by the nearby desalination operation, while the area just beside the desalination inflow showed relatively strong effects. Different weather conditions controlled the brine’s propagation inside the lagoons. Moreover, increasing the width of the inflow boundaries and injecting tracer during tide and mean wind condition are new precautions which may help to preserve the water quality in a future warmer world. This study is one of the first simulations for eutrophication in manmade lagoons.
Positive Lyapunov exponents for higher dimensional quasiperiodic cocycles
Creators: name: Duarte, Pedro
name: Klein, Silvius
Publisher: name: arXiv
Year: 2012
Subjects: subject: Dynamical Systems (math.DS)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: We consider an m-dimensional analytic cocycle with underlying dynamics given by an irrational translation on the circle. Assuming that the d-dimensional upper left corner of the cocycle is typically large enough, we prove that the d largest Lyapunov exponents associated with this cocycle are bounded away from zero. The result is uniform relative to certain measurements on the matrix blocks forming the cocycle. As an application of this result, we obtain nonperturbative (in the spirit of Sorets-Spencer theorem) positive lower bounds of the nonnegative Lyapunov exponents for various models of band lattice Schroedinger operators.
description: 37 pages