cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Meta model application for consistency management of models for avionic systems design
Creators: name: Stegen, Jef
name: Dutre, Stefan
name: Guo, Joe Zhensheng
name: Zeller, Marc
name: Rothbauer, Stefan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: This paper presents the application of a meta model and single underlying model on an applied avionics system design use case. System models, safety assurance cases and safety requirements are maintained in a central repository. This enables to link these data which are originally developed in unrelated tools. By having such a central repository, traceability can be established, and consistency can be ensured, which leads to less errors and a shorter development time. A meta model was constructed which matches the central repository to enable bidirectional synchronization with an external authoring tool.
Assessing car dependence: Development of a comprehensive survey approach based on the concept of a travel skeleton
Creators: name: Behren, S. Von
name: Minster, C.
name: Esch, J.
name: Hunecke, M.
name: Vortisch, P.
name: Chlond, B.
Publisher: name: Elsevier
Year: 2018
Subjects: Car dependence
travel behavior
travel skeleton

description: We defined objective (car needs for daily activities) and subjective dimension (other aspects to a car than mobility) of car dependence. We develop an integrated survey design that allows to collect typical weekly travel behavior and sociodemographic data, as well as psychological constructs. To define differing types of car dependence we used the data from an international survey undertaken in Berlin (Germany), San Francisco (USA) and Shanghai (China). We identified dissonances between individuals based on subjective and objective dimensions. The findings also showed that respondents from San Francisco were more objectively dependent on cars than respondents from Berlin or Shanghai.
Black Holes at the LHC: Progress since 2002
Creators: name: Park, Seong Chan
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We review the recent noticeable progresses in black hole physics focusing on the up-coming super-collider, the LHC. We discuss the classical formation of black holes by particle collision, the greybody factors for higher dimensional rotating black holes, the deep implications of black hole physics to the `energy-distance' relation, the security issues of the LHC associated with black hole formation and the newly developed Monte-Carlo generators for black hole events.
description: 6 pages, 10 figures, Plenary talk given at the 16th International Conference on Supersymmetry and the Unification of Fundamental Interactions (SUSY08), Seoul, Korea (June 16-21, 2008). To be published in the Conference Proceedings
SMARPs and SHARPs: Two Solar Cycles of Active Region Data
Creators: name: Bobra, Monica G.
name: Wright, Paul J.
name: Sun, Xudong
name: Turmon, Michael J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present a new data product, called Space-Weather MDI Active Region Patches (SMARPs), derived from maps of the solar surface magnetic field taken by the Michelson Doppler Imager (MDI) aboard the Solar and Heliospheric Observatory (SoHO). Together with the Space-Weather HMI Active Region Patches (SHARPs), derived from similar maps taken by the Helioseismic and Magnetic Imager (HMI) aboard the Solar Dynamics Observatory, these data provide a continuous and seamless set of maps and keywords that describe every active region observed over the last two solar cycles, from 1996 to the present day. In this paper, we describe the SMARP data and compare it to the SHARP data.
description: 11 pages, 3 figures, accepted in ApJS
Dynamics of Bloch vectors and the channel capacity of a non identical charged qubit pair
Creators: name: Metwally, Nasser
name: Abdel-Aty, Mahmoud
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We have considered a system of two superconducting charge qubits capacitively coupled to a microwave resonator. The dynamics of the Bloch vectors are investigated for different regimes. By means of the Bloch vectors and cross dyadic we quantify the degree of entanglement contained in the generated entangled state. We consider different values of the system parameters to discuss the dynamics of the channel capacity between the qubits. We show that there is an important role played by initial state settings, coupling constant and the mean photon number on generating entangled state with high degree of entanglement and high capacity.
title: Front Matter, Table of Contents, Preface, Committees, List of Authors
Creators: name: Anceaume, Emmanuelle
name: Cachin, Christian
name: Potop-Butucaru, Maria
Publisher: name: Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Year: 2016
Subjects: subject: Front Matter
subject: Table of Contents
subject: Preface
subject: Committees
subject: List of Authors

description: Front Matter, Table of Contents, Preface, Committees, List of Authors
description: LIPIcs, Vol. 46, 19th International Conference on Principles of Distributed Systems (OPODIS 2015), pages 0:i-0:xvi
MultiRes-NetVLAD: Augmenting Place Recognition Training with Low-Resolution Imagery
Creators: name: Khaliq, Ahmad
name: Milford, Michael
name: Garg, Sourav
Publisher: name: arXiv
Year: 2022
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Artificial Intelligence (cs.AI)
subject: Information Retrieval (cs.IR)
subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: Visual Place Recognition (VPR) is a crucial component of 6-DoF localization, visual SLAM and structure-from-motion pipelines, tasked to generate an initial list of place match hypotheses by matching global place descriptors. However, commonly-used CNN-based methods either process multiple image resolutions after training or use a single resolution and limit multi-scale feature extraction to the last convolutional layer during training. In this paper, we augment NetVLAD representation learning with low-resolution image pyramid encoding which leads to richer place representations. The resultant multi-resolution feature pyramid can be conveniently aggregated through VLAD into a single compact representation, avoiding the need for concatenation or summation of multiple patches in recent multi-scale approaches. Furthermore, we show that the underlying learnt feature tensor can be combined with existing multi-scale approaches to improve their baseline performance. Evaluation on 15 viewpoint-varying and viewpoint-consistent benchmarking datasets confirm that the proposed MultiRes-NetVLAD leads to state-of-the-art Recall@N performance for global descriptor based retrieval, compared against 11 existing techniques. Source code is publicly available at https://github.com/Ahmedest61/MultiRes-NetVLAD.
description: 12 pages, 6 Figures, Accepted for publication in IEEE RA-L 2022 and ICRA 2022, includes supplementary material
Employer free speech during organization drives and decertification campaigns
Creators: name: McPhillips, David C.
Publisher: name: University of British Columbia
Year: 2010

description: One of the most contentious issues within the area of Industrial Relations is the right of an employer to express his opinions directly to his employees concerning unions. This doctrine of "Employer Free Speech" has been the subject of much debate and was the subject of amendments to the Labour Code in B.C. in 1977. This study will examine how this problem is dealt with in British Columbia and use for comparison purposes the jurisdictions of Ontario, Canada and the United States. The first chapter examines the philosophy behind the doctrine and the actual provisions dealing with free speech in the Labour Statutes of the four jurisdictions. A brief overview of other unfair labour practices will also be included to put our discussion in context. The second chapter of the thesis will deal with actions taken during an organizational campaign. The general guidelines established in each jurisdiction will be discussed and then a review of specific kinds of behaviours will be undertaken. This part will then deal with a discussion of the 1977 Amendments to the British Columbia Code. Chapter three will focus on employer interference during the decertification process and compare the differing philosophies of the four jurisdictions. The final section of the thesis contains the observations and recommendations of the author.
Analyticity of the Free Energy of a Closed 3-Manifold
Creators: name: Garoufalidis, Stavros
name: Le, Thang T. Q.
name: Marino, Marcos
Publisher: name: arXiv
Year: 2008
Subjects: subject: Geometric Topology (math.GT)
subject: High Energy Physics - Theory (hep-th)
subject: Quantum Algebra (math.QA)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 57M27

description: The free energy of a closed 3-manifold is a 2-parameter formal power series which encodes the perturbative Chern-Simons invariant (also known as the LMO invariant) of a closed 3-manifold with gauge group U(N) for arbitrary $N$. We prove that the free energy of an arbitrary closed 3-manifold is uniformly Gevrey-1. As a corollary, it follows that the genus $g$ part of the free energy is convergent in a neighborhood of zero, independent of the genus. Our results follow from an estimate of the LMO invariant, in a particular gauge, and from recent results of Bender-Gao-Richmond on the asymptotics of the number of rooted maps for arbitrary genus. We illustrate our results with an explicit formula for the free energy of a Lens space. In addition, using the Painlevé differential equation, we obtain an asymptotic expansion for the number of cubic graphs to all orders, stengthening the results of Bender-Gao-Richmond.
description: This is a contribution to the Special Issue on Deformation Quantization, published in SIGMA (Symmetry, Integrability and Geometry: Methods and Applications) at http://www.emis.de/journals/SIGMA/
Homogenization of a singular random one-dimensional PDE
Creators: name: Iftimie, Bogdan
name: Pardoux, Étienne
name: Piatnitski, Andrey
Publisher: name: arXiv
Year: 2008
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics

description: This paper deals with the homogenization problem for a one-dimensional parabolic PDE with random stationary mixing coefficients in the presence of a large zero order term. We show that under a proper choice of the scaling factor for the said zero order terms, the family of solutions of the studied problem converges in law, and describe the limit process. It should be noted that the limit dynamics remain random.
description: Published in at http://dx.doi.org/10.1214/07-AIHP134 the Annales de l'Institut Henri Poincar\'e - Probabilit\'es et Statistiques (http://www.imstat.org/aihp/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Elliptic Hypergeometric Laurent Biorthogonal Polynomials with a Dense Point Spectrum on the Unit Circle
Creators: name: Tsujimoto, Satoshi
name: Zhedanov, Alexei
Publisher: name: arXiv
Year: 2008
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 33E05, 33E30, 33C47

description: Using the technique of the elliptic Frobenius determinant, we construct new elliptic solutions of the $QD$-algorithm. These solutions can be interpreted as elliptic solutions of the discrete-time Toda chain as well. As a by-product, we obtain new explicit orthogonal and biorthogonal polynomials in terms of the elliptic hypergeometric function ${_3}E_2(z)$. Their recurrence coefficients are expressed in terms of the elliptic functions. In the degenerate case we obtain the Krall-Jacobi polynomials and their biorthogonal analogs.
Strangeness in astrophysics: Theoretical developments
Creators: name: Dexheimer, Veronica
name: Aryal, Krishna
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: High Energy Physics - Theory (hep-th)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: In this conference proceeding, we review important theoretical developments related to the production of strangeness in astrophysics. This includes its effects in supernova explosions, neutron stars, and compact-star mergers. We also discuss in detail how the presence of net strangeness affects the deconfinement to quark matter, expected to take place at large densities and/or temperatures. We conclude that a complete description of dense matter containing hyperons and strange quarks is fundamental for the understanding of modern high-energy astrophysics.
description: Conference Proceeding for the 19th International Conference on Strangeness in Quark Matter (SQM 2021)
The fraction of Bose-Einstein condensed triplons in TlCuCl3 from magnetization M(T,H)-data
Creators: name: Dell'Amore, R.
name: Krämer, K.
name: Schilling, A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: In this study we calculate the fraction of condensed magnetic quasiparticles of TlCuCl3 from magnetization M(T,H)-data. It is independent of the direction of the magnetic field and slightly decreases with increasing magnetic field.
description: 8 pages, 10 figures
Magnetic breakdown of cyclotron orbits in systems with Rashba and Dresselhaus spin-orbit coupling
Creators: name: Reynoso, A. A.
name: Usaj, Gonzalo
name: Balseiro, C. A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We study the effect of the interplay between the Rashba and the Dresselhaus spin-orbit couplings on the transverse electron focusing in two-dimensional electron gases. Depending on their relative magnitude, the presence of both couplings can result in the splitting of the first focusing peak into two or three. This splitting has information about the relative value of spin-orbit couplings and therefore about the shape of the Fermi surface. More interesting, the presence of the third peak is directly related to the tunneling probability ("magnetic breakdown") between orbits corresponding to the different sheets of the Fermi surface. In addition, destructive interference effects between paths that involve tunneling and those that do not can be observed in the second focusing condition. Such electron paths (orbits) could be experimentally detected using current techniques for imaging the electron flow opening the possibility to directly observe and characterize the magnetic breakdown effect in this system.
description: 9 pages, 8 figures
Bundles of C*-categories, II: C*-dynamical systems and Dixmier-Douady invariants
Creators: name: Vasselli, Ezio
Publisher: name: arXiv
Year: 2008
Subjects: subject: Operator Algebras (math.OA)
subject: Category Theory (math.CT)
subject: K-Theory and Homology (math.KT)
subject: FOS: Mathematics
subject: 18D10, 22D25, 14F05, 55N30

description: We introduce a cohomological invariant arising from a class in nonabelian cohomology. This invariant generalizes the Dixmier-Douady class and encodes the obstruction to a C*-algebra bundle being the fixed-point algebra of a gauge action. As an application, the duality breaking for group bundles vs. tensor C*-categories with non-simple unit is discussed in the setting of Nistor-Troitsky gauge-equivariant K-theory: there is a map assigning a nonabelian gerbe to a tensor category, and "triviality" of the gerbe is equivalent to the existence of a dual group bundle. At the C*-algebraic level, this corresponds to studying C*-algebra bundles with fibre a fixed-point algebra of the Cuntz algebra and in this case our invariant describes the obstruction to finding an embedding into the Cuntz-Pimsner algebra of a vector bundle.
description: 27 pages; contains a revised version of the second part of math/0510594v1. A new section on gauge actions on C*-bundles has been added, and nonabelian gerbes have been considered as invariants associated with tensor C*-categories
Big rip avoidance via black holes production
Creators: name: Fabris, Julio C.
name: Pavon, Diego
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider a cosmological scenario in which the expansion of the Universe is dominated by phantom dark energy and black holes which condense out of the latter component. The mass of black holes decreases via Hawking evaporation and by accretion of phantom fluid but new black holes arise continuously whence the overall evolution can be rather complex. We study the corresponding dynamical system to unravel this evolution and single out scenarios where the big rip singularity does not occur.
description: 16 pages, two figures. Key words. Cosmology, phantom energy, black holes. Sligthly extended version to be published in Gravitation and Cosmology
On the Use of Field RR Lyrae as Galactic Probes. V. Optical and radial velocity curve templates
Creators: name: Braga, V. F.
name: Crestani, J.
name: Fabrizio, M.
name: Bono, G.
name: Preston, G. W.
name: Sneden, C.
name: Storm, J.
name: Kamann, S.
name: Latour, M.
name: Lala, H.
name: Lemasle, B.
name: Prudil, Z.
name: Altavilla, G.
name: Chaboyer, B.
name: Dall'Ora, M.
name: Ferraro, I.
name: Gilligan, C. K.
name: Fiorentino, G.
name: Iannicola, G.
name: Inno, L.
name: Kwak, S.
name: Marengo, M.
name: Marinoni, S.
name: Marrese, P. M.
name: Martínez-Vázquez, C. E.
name: Monelli, M.
name: Mullen, J. P.
name: Matsunaga, N.
name: Neeley, J.
name: Stetson, P. B.
name: Valenti, E.
name: Zoccali, M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We collected the largest spectroscopic catalog of RR Lyrae (RRLs) including $\approx$20,000 high-, medium- and low-resolution spectra for $\approx$10,000 RRLs. We provide the analytical forms of radial velocity curve (RVC) templates. These were built using 36 RRLs (31 fundamental -- split into three period bins -- and 5 first overtone pulsators) with well-sampled RVCs based on three groups of metallic lines (Fe, Mg, Na) and four Balmer lines (H$_α$, H$_β$, H$_γ$, H$_δ$). We tackled the long-standing problem of the reference epoch to anchor light curve and RVC templates. For the $V$-band, we found that the residuals of the templates anchored to the phase of the mean magnitude along the rising branch are $\sim$35\% to $\sim$45\% smaller than those anchored to the phase of maximum light. For the RVC, we used two independent reference epochs for metallic and Balmer lines and we verified that the residuals of the RVC templates anchored to the phase of mean RV are from 30\% (metallic lines) up to 45\% (Balmer lines) smaller than those anchored to the phase of minimum RV. We validated our RVC templates by using both the single- and the three-phase points approach. We found that barycentric velocities based on our RVC templates are two-three times more accurate than those available in the literature. We applied the current RVC templates to Balmer lines RVs of RRLs in the globular NGC~3201 collected with MUSE at VLT. We found the cluster barycentric RV of $V_γ$=496.89$\pm$8.37(error)$\pm$3.43 (standard deviation) km/s, which agrees well with literature estimates.
Chiral control of electron transmission through molecules
Creators: name: Skourtis, Spiros S.
name: Beratan, David N.
name: Naaman, Ron
name: Nitzan, Abraham
name: Waldeck, David H.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: General Physics (physics.gen-ph)
subject: FOS: Physical sciences

description: Electron transmission through chiral molecules induced by circularly polarized light can be very different for mirror-image structures, a peculiar fact given that the electronic energy spectra of the systems are identical. We propose that this asymmetry - as large as 10% for resonance transport- arises from different dynamical responses of the mirrored structures to coherent excitation. This behaviour is described in the context of a general novel phenomenon, current transfer, transfer of charge with its momentum information, that is outlined in terms of a simple tight binding model. This analysis makes it possible to account for the observed asymmetry in and off resonance, to characterize its dependence on the length of the molecular bridge and to examine effects of dephasing processes.
description: 8 pages, 4 figures
Conductivity of suspended and non-suspended graphene at finite gate voltage
Creators: name: Stauber, T.
name: Peres, N. M. R.
name: Neto, A. H. Castro
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We compute the DC and the optical conductivity of graphene for finite values of the chemical potential by taking into account the effect of disorder, due to mid-gap states (unitary scatterers) and charged impurities, and the effect of both optical and acoustic phonons. The disorder due to mid-gap states is treated in the coherent potential approximation (CPA, a self-consistent approach based on the Dyson equation), whereas that due to charged impurities is also treated via the Dyson equation, with the self-energy computed using second order perturbation theory. The effect of the phonons is also included via the Dyson equation, with the self energy computed using first order perturbation theory. The self-energy due to phonons is computed both using the bare electronic Green's function and the full electronic Green's function, although we show that the effect of disorder on the phonon-propagator is negligible. Our results are in qualitative agreement with recent experiments. Quantitative agreement could be obtained if one assumes water molelcules under the graphene substrate. We also comment on the electron-hole asymmetry observed in the DC conductivity of suspended graphene.
description: 13 pages, 11 figures
Electrostatic extraction of cold molecules from a cryogenic reservoir
Creators: name: van Buuren, L. D.
name: Sommer, C.
name: Motsch, M.
name: Pohle, S.
name: Schenk, M.
name: Bayerl, J.
name: Pinkse, P. W. H.
name: Rempe, G.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: We present a method which delivers a continuous, high-density beam of slow and internally cold polar molecules. In our source, warm molecules are first cooled by collisions with a cryogenic helium buffer gas. Cold molecules are then extracted by means of an electrostatic quadrupole guide. For ND$_3$ the source produces fluxes up to $(7 \pm ^{7}_{4}) \times 10^{10}$ molecules/s with peak densities up to $(1.0 \pm ^{1.0}_{0.6}) \times 10^9$ molecules/cm$^3$. For H$_2$CO the population of rovibrational states is monitored by depletion spectroscopy, resulting in single-state populations up to $(82 \pm 10)%$.
description: 4 pages, 4 figures, changes to the text, updated figures and references
The quenched invariance principle for random walks in random environments admitting a bounded cycle representation
Creators: name: Deuschel, Jean-Dominique
name: Kösters, Holger
Publisher: name: arXiv
Year: 2008
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics

description: We derive a quenched invariance principle for random walks in random environments whose transition probabilities are defined in terms of weighted cycles of bounded length. To this end, we adapt the proof for random walks among random conductances by Sidoravicius and Sznitman (Probab. Theory Related Fields 129 (2004) 219--244) to the non-reversible setting.
description: Published in at http://dx.doi.org/10.1214/07-AIHP122 the Annales de l'Institut Henri Poincar\'e - Probabilit\'es et Statistiques (http://www.imstat.org/aihp/) by the Institute of Mathematical Statistics (http://www.imstat.org)
End-to-End Hierarchical Relation Extraction for Generic Form Understanding
Creators: name: Dang, Tuan-Anh Nguyen
name: Hoang, Duc-Thanh
name: Tran, Quang-Bach
name: Pan, Chih-Wei
name: Nguyen, Thanh-Dat
Publisher: name: arXiv
Year: 2021
Subjects: subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Form understanding is a challenging problem which aims to recognize semantic entities from the input document and their hierarchical relations. Previous approaches face significant difficulty dealing with the complexity of the task, thus treat these objectives separately. To this end, we present a novel deep neural network to jointly perform both entity detection and link prediction in an end-to-end fashion. Our model extends the Multi-stage Attentional U-Net architecture with the Part-Intensity Fields and Part-Association Fields for link prediction, enriching the spatial information flow with the additional supervision from entity linking. We demonstrate the effectiveness of the model on the Form Understanding in Noisy Scanned Documents (FUNSD) dataset, where our method substantially outperforms the original model and state-of-the-art baselines in both Entity Labeling and Entity Linking task.
description: Accepted to ICPR 2020
A 600 minute near-infrared lightcurve of Sagittarius A*
Creators: name: Meyer, L.
name: Do, T.
name: Ghez, A.
name: Morris, M. R.
name: Witzel, G.
name: Eckart, A.
name: Belanger, G.
name: Schoedel, R.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present the longest, by a factor of two, near-infrared lightcurve from Sgr A* - the supermassive black hole in the Galactic center. Achieved by combining Keck and VLT data from one common night, which fortuitously had simultaneous Chandra and SMA data, this lightcurve is used to address two outstanding problems. First, a putative quasi-periodicity of ~20 min reported by groups using ESO's VLT is not confirmed by Keck observations. Second, while the infrared and mm-regimes are thought to be related based on reported time lags between lightcurves from the two wavelength domains, the reported time lag of 20 min inferred using the Keck data of this common VLT/Keck night only is at odds with the lag of ~100 min reported earlier. With our long lightcurve, we find that (i) the simultaneous 1.3 millimeter observations are in fact consistent with a ~100 min time lag, (ii) the different methods of NIR photometry used by the VLT and Keck groups lead to consistent results, (iii) the Lomb-Scargle periodogram of the whole NIR lightcurve is featureless and follows a power-law with slope -1.6, and (iv) scanning the lightcurve with a sliding window to look for a transient QPO phenomenon reveals for a certain part of the lightcurve a 25 min peak in the periodogram. Using Monte Carlo simulations and taking the number of trials into account, we find it to be insignificant.
description: 12 pages, 3 figures; accepted by ApJ Letters for publication
Probing rotated Weyl physics on nonlinear lithium niobate-on-insulator chips
Creators: name: Yan, Zhi-Wei
name: Wang, Qiang
name: Xiao, Meng
name: Zhao, Yu-Le
name: Zhu, Shi-Ning
name: Liu, Hui
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optics (physics.optics)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Topological photonics, featured by stable topological edge states resistant to perturbations, has been utilized to design robust integrated devices. Here, we present a study exploring the intriguing topological rotated Weyl physics in a 3D parameter space based on quaternary waveguide arrays on lithium niobate-on-insulator (LNOI) chips. Unlike previous works that focus on the Fermi arc surface states of a single Weyl structure, we can experimentally construct arbitrary interfaces between two Weyl structures whose orientations can be freely rotated in the synthetic parameter space. This intriguing system was difficult to realize in usual 3D Weyl semimetals due to lattice mismatch. We found whether the interface can host gapless topological interface states (TISs) or not, is determined by the relative rotational directions of the two Weyl structures. In the experiment, we have probed the local characteristics of the TISs through linear optical transmission and nonlinear second harmonic generation. Our study introduces a novel path to explore topological photonics on LNOI chips and various applications in integrated nonlinear and quantum optics.
description: 31 pages, 15 figures
title: Generating settlement structures: a method for urban planning and analysis supported by cellular automata
Creators: name: König, Reinhard
name: Bauriedel, Christian
Publisher: name: Bauhaus-Universität Weimar
Year: 2009
Subjects: subject: 000

description: Previous models for the explanation of settlement processes pay little attention to the interactions between settlement spreading and road networks. On the basis of a dielectric breakdown model in combination with cellular automata, we present a method to steer precisely the generation of settlement structures with regard to their global and local density as well as the size and number of forming clusters. The resulting structures depend on the logic of how the dependence of the settlements and the road network is implemented to the simulation model. After analysing the state of the art we begin with a discussion of the mutual dependence of roads and land development. Next, we elaborate a model that permits the precise control of permeability in the developing structure as well as the settlement density, using the fewest necessary control parameters. On the basis of different characteristic values, possible settlement structures are analysed and compared with each other. Finally, we reflect on the theoretical contribution of the model with regard to the context of urban dynamics.
Measurement of the Single Top Quark Production Cross Section at CDF
Creators: name: CDF Collaboration
name: Aaltonen, T.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We report a measurement of the single top quark production cross section in 2.2 ~fb-1 of p-pbar collision data collected by the Collider Detector at Fermilab at sqrt{s}=1.96 TeV. Candidate events are classified as signal-like by three parallel analyses which use likelihood, matrix element, and neural network discriminants. These results are combined in order to improve the sensitivity. We observe a signal consistent with the standard model prediction, but inconsistent with the background-only model by 3.7 standard deviations with a median expected sensitivity of 4.9 standard deviations. We measure a cross section of 2.2 +0.7 -0.6(stat+sys) pb, extract the CKM matrix element value |V_{tb}|=0.88 +0.13 -0.12 (stat+sys) +- 0.07(theory), and set the limit |V_{tb}|>0.66 at the 95% C.L.
description: After referee comments/new draft. Phys. Rev. Lett. 7 pages, two figures
Torelli theorem for the moduli spaces of pairs
Creators: name: Munoz, Vicente
Publisher: name: arXiv
Year: 2008
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 14F45; 14D20; 14H60

description: Let X be a smooth projective curve of genus at least two over the complex numbers. A pair (E,ϕ) over X consists of an algebraic vector bundle E over X and a holomorphic section ϕof E. There is a concept of stability for pairs which depends on a real parameter τ. Here we prove that the third cohomology groups of the moduli spaces of τ-stable pairs with fixed determinant and rank at least two are polarised pure Hodge structures, and they are isomorphic to H^1(X) with its natural polarisation (except in very few exceptional cases). This implies a Torelli theorem for such moduli spaces. We recover that the third cohomology group of the moduli space of stable bundles of rank at least two and fixed determinant is a polarised pure Hodge structure, which is isomorphic to H^1(X). We also prove Torelli theorems for the corresponding moduli spaces of pairs and bundles with non-fixed determinant.
description: 22 pages
The application of geographic information systems in schools around the world: a retrospective analysis
Creators: name: Kholoshyn, Ihor
name: Nazarenko, Tetiana
name: Bondarenko, Olga
name: Hanchuk, Olena
name: Varfolomyeyeva, Iryna
Publisher: name: arXiv
Year: 2022
Subjects: subject: Computers and Society (cs.CY)
subject: FOS: Computer and information sciences

description: The article is devoted to the problem of incorporation geographic information systems (GIS) in world school practice. The authors single out the stages of GIS application in school geographical education based on the retrospective analysis of the scientific literature. The first stage (late 70s - early 90s of the 20th century) is the beginning of the first educational GIS programs and partnership agreements between schools and universities. The second stage (mid 90s of the 20th century - the beginning of the 21st century) comprises the distribution of GIS-educational programs in European and Australian schools with the involvement of leading developers of GIS-packages (ESRI, Intergraph, MapInfo Corp., etc.). The third stage (2005-2012) marks the spread of the GIS school education in Eastern Europe, Asia, Africa and Latin America; on the fourth stage (from 2012 to the present) geographic information systems emerge in school curricula in most countries. The haracteristics of the GIS-technologies development stages are given considering the GIS didactic possibilities for the study of school geography, as well as highlighting their advantages and disadvantages.
description: 16 pages, 6 figure, 2 table
Charmonium in lattice QCD and the non-relativistic quark-model
Creators: name: Dudek, Jozef J.
name: Rrapaj, Ermal
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We compare the results of a numerical lattice QCD calculation of the charmonium spectrum with the structure of a general non-relativistic potential model. To achieve this we form the non-relativistic reduction of derivative-based fermion bilinear interpolating fields used in lattice QCD calculations and compute their overlap with c-cbar meson states at rest constructed in the non-relativistic quark model, providing a bound-state model interpretation for the lattice data. Essential gluonic components in the bound-states, usually called hybrids, are identified by considering interpolating fields that involve the gluonic field-strength tensor and which have zero overlap onto simple c-cbar model states.
Structural and magnetic phase diagram of CeFeAsO1-xFx and its relationship to high-temperature superconductivity
Creators: name: Zhao, Jun
name: Huang, Q.
name: de la Cruz, Clarina
name: Li, Shiliang
name: Lynn, J. W.
name: Chen, Y.
name: Green, M. A.
name: Chen, G. F.
name: Li, G.
name: Li, Z.
name: Luo, J. L.
name: Wang, N. L.
name: Dai, Pengcheng
Publisher: name: arXiv
Year: 2008
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We use neutron scattering to study the structural and magnetic phase transitions in the iron pnictides CeFeAsO1-xFx as the system is tuned from a semimetal to a high-transition-temperature (high-Tc) superconductor through Fluorine (F) doping x. In the undoped state, CeFeAsO develops a structural lattice distortion followed by a stripe like commensurate antiferromagnetic order with decreasing temperature. With increasing Fluorine doping, the structural phase transition decreases gradually while the antiferromagnetic order is suppressed before the appearance of superconductivity, resulting an electronic phase diagram remarkably similar to that of the high-Tc copper oxides. Comparison of the structural evolution of CeFeAsO1-xFx with other Fe-based superconductors reveals that the effective electronic band width decreases systematically for materials with higher Tc. The results suggest that electron correlation effects are important for the mechanism of high-Tc superconductivity in these Fe pnictides.
description: 19 pages, 5 figures
PointAcc: Efficient Point Cloud Accelerator
Creators: name: Lin, Yujun
name: Zhang, Zhekai
name: Tang, Haotian
name: Wang, Hanrui
name: Han, Song
Publisher: name: arXiv
Year: 2021
Subjects: subject: Hardware Architecture (cs.AR)
subject: FOS: Computer and information sciences

description: Deep learning on point clouds plays a vital role in a wide range of applications such as autonomous driving and AR/VR. These applications interact with people in real-time on edge devices and thus require low latency and low energy. Compared to projecting the point cloud to 2D space, directly processing the 3D point cloud yields higher accuracy and lower #MACs. However, the extremely sparse nature of point cloud poses challenges to hardware acceleration. For example, we need to explicitly determine the nonzero outputs and search for the nonzero neighbors (mapping operation), which is unsupported in existing accelerators. Furthermore, explicit gather and scatter of sparse features are required, resulting in large data movement overhead. In this paper, we comprehensively analyze the performance bottleneck of modern point cloud networks on CPU/GPU/TPU. To address the challenges, we then present PointAcc, a novel point cloud deep learning accelerator. PointAcc maps diverse mapping operations onto one versatile ranking-based kernel, streams the sparse computation with configurable caching, and temporally fuses consecutive dense layers to reduce the memory footprint. Evaluated on 8 point cloud models across 4 applications, PointAcc achieves 3.7X speedup and 22X energy savings over RTX 2080Ti GPU. Co-designed with light-weight neural networks, PointAcc rivals the prior accelerator Mesorasi by 100X speedup with 9.1% higher accuracy running segmentation on the S3DIS dataset. PointAcc paves the way for efficient point cloud recognition.
description: Accepted by Mircro 2021
title: Assessment of the Adhesion Performance of Diamond-Like Carbon Coatings at Elevated Temperature
Creators: name: Braak, Richard
Publisher: name: UNSPECIFIED
Year: 2021

description: Coatings of diamond-like carbon (DLC) are amorphous thin ﬁlms with diamond-like properties and therefore excellently suited for the reduction of friction and wear in tribological systems. A reduced wear rate corresponds to a longer mean lifetime of the system. However, an adhesive failure of the DLC coating can lead to immediate failure of the application. Particularly, intrinsic compressive stresses within the DLC coatings are a driving force for delamination of these thin ﬁlms. In order to assess the risk for an adhesive failure, it is common sense that the adhesion of the coating is the essential property of the coating system. However, it will be shown, that for DLC coatings, the delamination initiation and its propagation rely on diﬀerent characteristic stress conditions. This is especially relevant for coating systems with extended adhesion layer systems. For a reliable assessment of the risk for adhesive failure, this interplay between initiation and propagation of delamination must be considered. Therefore the term adhesion performance is introduced as a systemic measure dependent on the application conditions and comprising delamination initiation and progression. For establishing the model for the adhesion performance, the Evans-&-Hutchinson-model based on buckling of an Euler column is extended by considering the initiation of buckling, as well as the re-initiation of buckling after break-away of a coating segment, where a characteristic residual crack remains and crack growth can be driven by corrosive means. Finally, thermal aging is investigated, motivated by elevated application temperatures, which can activate diﬀusion processes, altering the adhesion performance. A routine for assessing the adhesion performance is worked out based on the three aspects delamination initiation, buckling and re-initiation of delamination, complemented by the inﬂuence of thermal aging on the adhesion performance. This approach is performed on nine diﬀerent adhesion layer designs as support for hydrogenated and H-free DLCs. The adhesion layer designs comprise metallic Cr- and Ti-adhesion layers with diﬀerent kinds of carbide interlayers, such as CrxCy, TiC and SiC, partly with alterations in the deposition process. The coating systems are extensively analyzed via transmission electron microscopy, in order to correlate structure and phase compositions with the adhesion performance. A design concept for adequate adhesion performance with respect to automotive applications with steel substrates and elevated temperatures was furthermore derived based on the ﬁndings.
High-resolution radio observations of X-ray binaries
Creators: name: Miller-Jones, James
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: I present an overview of important results obtained using high-resolution very long baseline interferometry (VLBI) observations of X-ray binary systems. These results derive from both astrometric observations and resolved imaging of sources, from black holes to neutron star and even white dwarf systems. I outline a number of upcoming developments in instrumentation, both new facilities and ongoing upgrades to existing VLBI instruments, and I conclude by identifying a number of important areas of investigation where VLBI will be crucial in advancing our understanding of X-ray binaries.
description: 10 pages. To appear in proceedings of "The Universe under the Microscope - Astrophysics at High Angular Resolution" (Bad Honnef, Germany, April 2008), eds. R. Schoedel, A. Eckart, S. Pfalzner, and E. Ros, published in Journal of Physics: Conference Series by Institute of Physics Publishing
Motifs de démotorisation des actifs et retraités dans les aires urbaines françaises : premiers résultats statistiques de l'enquête MoDe
Creators: name: Emery, Justin
name: Motte-Baumvol, Benjamin
name: Hivert, Laurent
Publisher: name: Univ Gustave Eiffel
Year: 2021
Subjects: Sciences de l'Homme et Société
GEOGRAPHIE
SOCIOLOGIE

description: En s'appuyant sur une enquête quantitative d'ampleur nationale réalisée auprès de 2 000 ménages (comprenant 1 000 ménages démotorisés et 1 000 ménages jumeaux non démotorisés), nous proposons de fournir un premier état des lieux de la démotorisation en France. Cette enquête par questionnaire, menée lors de l'hiver 2017-2018 auprès d'une population issue d’un panel de ménages représentatifs de la population française (panel Metaskope de Kantar-TNS ex-TNS-Sofres), vise à explorer les facteurs sociaux, économiques, démographiques, spatiaux et culturels qui conduisent certains ménages à se démotoriser. Associée à l'enquête « Parc Auto » (Kantar-TNS pour Ademe-CCFA-Ifsttar-DSR) sur le même panel, cette enquête constitue une source de données originale sur la mobilité des ménages démotorisés, produite dans le cadre de la recherche ANR « MoDe » (Motives for Demotorisation in French Urban Areas). À partir de deux modèles de régression logistique multinomiale, ces données collectées permettent de mettre en évidence les ressorts de la démotorisation des ménages en France, pour les actifs d’une part et pour les retraités d’autre part. Ces analyses nous conduisent à distinguer différents profils de ménages démotorisés, entre ceux qui le sont totalement (ne disposant plus de voiture) et ceux qui ne le sont que partiellement (ayant diminué sans annuler le nombre de voitures dont ils disposent), face à l’ensemble de ménages motorisés.
description: RTS - Recherche Transports Sécurité, volume 2021
Rhetoric and the law
Creators: name: Aldridge, James Robert
Publisher: name: University of British Columbia
Year: 2010

description: Legal philosophy is viewed as irrelevant by virtually everyone except for legal philosophers. In this thesis, I suggest that the main reason for this is legal philosophy's inattention to the question of why the law and legal reasoning are valuable. Rather than addressing this issue, jurisprudence has simply assumed that the law is valuable because it is objective. Legal reasoning is valuable to the extent that it obtains the truth. The belief that law is essentially a system of rules stems from this underlying premise. The assumption that the only valuable rational activities are those which single mindedly pursue truth, is not unique to the law. In fact, it reached its highest expression in nineteenth and twentieth century science. But, in recent years, many philosophers have rejected the notion that science is objective, and based upon independently existing facts. This, however, has not resulted in a rejection of science's value. Similarly, an increasing number of legal philosophers are realizing that the belief in rules is a myth. The law is not, and cannot be objective. How then can it be valuable? To answer this question, I search for the foundation of the belief that truth is the only value of rationality. In fact, philosophy proceeded for hundreds of years without any such notion. The goal of rational activity was the good, or virtue, or excellence. Philosophers strove to generate beautiful or valuable visions of the universe. Rationality had several tools which it could employ to this end. Logic, the technique of proof, was but one of these tools. No less important was rhetoric, the art of persuasion, and the craft of the Sophists. The concept of truth as the most important value, was introduced in Athens, by Socrates, and especially by Plato and Aristotle. The legacy of these three individuals was the elevation of truth to a position of ultimate value. This, of course, resulted in a corresponding elevation of logic, and a demeaning of rhetoric. But logic, by its nature, can only elicit truth. Where there are other values, such as beauty, love, or justice, logic is impotent. The remainder of the thesis is dedicated to proposing a revival of rhetoric. I argue that philosophy in general, and the law in particular, should become openly and avowedly rhetorical. It is only by persuading the public that its decisions are just that the law can ever be just. Legal decisions will inevitably be decisions of value. Rhetoric is the tool that can guide our decision makers to an appreciation of our culture's values, and can give them the skill to reach "good", rather than "true" conclusions.