cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
PES Web-based Tutorial Series: Understanding Transient Recovery Voltages and Their Measurement in Substations, Session 4: TRV Measurement in Substations (Slides)
Creators: Dr. David Peelo & Dr. Farnoosh Rahmatian
Publisher: name: IEEE
Year: 2020

Transient recovery voltages (TRVs) are the voltages imposed on circuit breakers immediately after current interruption. The principal cases of interest are the interruption of the currents associated with terminal faults, short line faults and out-of-phase switching and breaking capacitive and inductive load currents. Each case is discussed in detail explaining the origin and derivation of the attributes associated with the TRVs including pole factors, amplitude factors, two and four parameter representations and travelling waves where applicable. Instrumentation for field measurement of TRVs will be discussed. Practical field issues such as sensor size and location, the challenge of using electric sensors that effectively change the circuit under test will be discussed. Use of optical voltage and current measurement techniques for non-intrusive measurement will be discussed in detail.
Transient recovery voltages (TRVs) are the voltages imposed on circuit breakers immediately after current interruption. The principal cases of interest are the interruption of the currents associated with terminal faults, short line faults and out-of-phase switching and breaking capacitive and inductive load currents. Each case is discussed in detail explaining the origin and derivation of the attributes associated with the TRVs including pole factors, amplitude factors, two and four parameter representations and travelling waves where applicable. Instrumentation for field measurement of TRVs will be discussed. Practical field issues such as sensor size and location, the challenge of using electric sensors that effectively change the circuit under test will be discussed. Use of optical voltage and current measurement techniques for non-intrusive measurement will be discussed in detail.
Symmetry-enforced topological nodal planes at the Fermi surface of a chiral magnet
Creators: name: Wilde, Marc A.
name: Dodenhöft, Matthias
name: Niedermayr, Arthur
name: Bauer, Andreas
name: Hirschmann, Moritz M.
name: Alpin, Kirill
name: Schnyder, Andreas P.
name: Pfleiderer, Christian
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Following over a decade of intense efforts to enable major progress in spintronics devices and quantum information technology by means of materials in which the electronic structure exhibits non-trivial topological properties, three key challenges are still unresolved. First, the identification of topological band degeneracies that are generically rather than accidentally located at the Fermi level. Second, the ability to easily control such topological degeneracies. And third, to identify generic topological degeneracies in large, multi-sheeted Fermi surfaces. Combining de Haas - van Alphen spectroscopy with density functional theory and band-topology calculations, we report here that the non-symmorphic symmetries in ferromagnetic MnSi generate nodal planes (NPs), which enforce topological protectorates (TPs) with substantial Berry curvatures at the intersection of the NPs with the Fermi surface (FS) regardless of the complexity of the FS. We predict that these TPs will be accompanied by sizeable Fermi arcs subject to the direction of the magnetization. Deriving the symmetry conditions underlying topological NPs, we show that the 1651 magnetic space groups comprise 7 grey groups and 26 black-and-white groups with topological NPs, including the space group of ferromagnetic MnSi. Thus, the identification of symmetry-enforced TPs on the FS of MnSi that may be controlled with a magnetic field suggests the existence of similar properties, amenable for technological exploitation, in a large number of materials.
description: accepted version prior to processing by editorial staff
Hyperbolic Delaunay complexes and Voronoi diagrams made practical
Creators: name: Bogdanov, Mikhail
name: Devillers, Olivier
name: Teillaud, Monique
Publisher: name: Journal of Computational Geometry
Year: 2014

description: We study Delaunay complexes and Voronoi diagrams in the Poincaré ball, a conformal model of the hyperbolic space, in any dimension. We elaborate on our earlier work on the space of spheres [CCCG'92], giving a detailed description of algorithms. We also study algebraic and arithmetic issues, observing that only rational computations are needed. All proofs are based on geometric reasoning; they do not resort to any use of the analytic formula of the hyperbolic distance. This allows for an exact and efficient implementation in 2D. All degenerate cases are handled. The implementation will be submitted to the CGAL editorial board for future integration into the CGAL library.
description: Journal of Computational Geometry, Vol. 5 No. 1 (2014)
Fortifying Vehicular Security Through Low Overhead Physically Unclonable Functions
Creators: name: Labrado, Carson
name: Thapliyal, Himanshu
name: Mohanty, Saraju P.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cryptography and Security (cs.CR)
subject: Hardware Architecture (cs.AR)
subject: FOS: Computer and information sciences

description: Within vehicles, the Controller Area Network (CAN) allows efficient communication between the electronic control units (ECUs) responsible for controlling the various subsystems. The CAN protocol was not designed to include much support for secure communication. The fact that so many critical systems can be accessed through an insecure communication network presents a major security concern. Adding security features to CAN is difficult due to the limited resources available to the individual ECUs and the costs that would be associated with adding the necessary hardware to support any additional security operations without overly degrading the performance of standard communication. Replacing the protocol is another option, but it is subject to many of the same problems. The lack of security becomes even more concerning as vehicles continue to adopt smart features. Smart vehicles have a multitude of communication interfaces would an attacker could exploit to gain access to the networks. In this work we propose a security framework that is based on physically unclonable functions (PUFs) and lightweight cryptography (LWC). The framework does not require any modification to the standard CAN protocol while also minimizing the amount of additional message overhead required for its operation. The improvements in our proposed framework results in major reduction in the number of CAN frames that must be sent during operation. For a system with 20 ECUs for example, our proposed framework only requires 6.5% of the number of CAN frames that is required by the existing approach to successfully authenticate every ECU.
description: 19 Pages
Ultrafast control of donor-bound electron spins with single detuned optical pulses
Creators: name: Fu, Kai-Mei C.
name: Clark, Susan M.
name: Santori, Charles
name: Holland, M. C.
name: Stanley, Colin R.
name: Yamamoto, Yoshihisa
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The ability to control spins in semiconductors is important in a variety of fields including spintronics and quantum information processing. Due to the potentially fast dephasing times of spins in the solid state [1-3], spin control operating on the picosecond or faster timescale may be necessary. Such speeds, which are not possible to attain with standard electron spin resonance (ESR) techniques based on microwave sources, can be attained with broadband optical pulses. One promising ultrafast technique utilizes single broadband pulses detuned from resonance in a three-level Lambda system [4]. This attractive technique is robust against optical pulse imperfections and does not require a fixed optical reference phase. Here we demonstrate the principle of coherent manipulation of spins theoretically and experimentally. Using this technique, donor-bound electron spin rotations with single-pulse areas exceeding pi/4 and two-pulses areas exceeding pi/2 are demonstrated. We believe the maximum pulse areas attained do not reflect a fundamental limit of the technique and larger pulse areas could be achieved in other material systems. This technique has applications from basic solid-state ESR spectroscopy to arbitrary single-qubit rotations [4, 5] and bang-bang control[6] for quantum computation.
description: 15 pages, 4 figures, submitted 12/2008. Since the submission of this work we have become aware of related work: J. Berezovsky, M. H. Mikkelsen, N. G. Stoltz, L. A. Coldren, and D. D. Awschalom, Science 320: 349-352 (2008)
Additional file 2 of COVID-19 vaccine acceptance, hesitancy, and determinants among physicians in a university-based teaching hospital in Thailand
Creators: name: Sirikalyanpaiboon, May
name: Ousirimaneechai, Krittin
name: Phannajit, Jeerath
name: Pitisuttithum, Panyavee
name: Jantarabenjakul, Watsamon
name: Chaiteerakij, Roongruedee
name: Paitoonpong, Leilani
Publisher: name: figshare
Year: 2021
Subjects: subject: Immunology
subject: FOS: Clinical medicine

description: Additional file 2: Table 1. Sensitivity analysis for multivariate logistic regression.
A stellar census in globular clusters with MUSE. A new perspective on the multiple main sequences of $ω$ Centauri
Creators: name: Latour, M.
name: Calamida, A.
name: Husser, T. -O.
name: Kamann, S.
name: Dreizler, S.
name: Brinchmann, J.
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: $ω$ Cen is a rare example of a globular cluster where the iron abundance of the stars spans more than one order of magnitude. Many spectroscopic investigations of its red-giant- and sub-giant- branches have revealed multiple peaks in the iron abundance distribution. The metallicity distribution of main-sequence (MS) stars is not well characterized yet, due to the faintness of the stars and lack of data. So far, almost all studies of MS stars are based on photometric measurements. Our goal is to investigate the metallicity distribution of a statistically significant sample of MS stars in $ω$ Cen. In particular, we aim at revisiting the metallicity difference between the red and blue MS of the cluster. We used MUSE spectra obtained for the central region of $ω$ Cen to derive metallicities for $\approx$4200 MS stars. We find that blue MS stars are on average $\approx$0.1 dex more metal-rich than their red counterparts. On the basis of this new estimate, we find that the two sequences can be fit on the Hubble Space Telescope color-magnitude diagram with two isochrones having the same global metallicity and age but a higher helium abundance for the blue MS, that is $ΔY \lesssim$ 0.1. Furthermore, we determine the average metallicity of the five main populations along $ω$ Cen MS and these estimates are consistent with expectations from previous photometric studies.
description: 9 pages, 7 figures, Accepted for publication in A&A
Exactly solvable D_N-type quantum spin models with long-range interaction
Creators: name: Basu-Mallick, B.
name: Finkel, F.
name: Gonzalez-Lopez, A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Mathematical Physics (math-ph)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: We derive the spectra of the D_N-type Calogero (rational) su(m) spin model, including the degeneracy factors of all energy levels. By taking the strong coupling limit of this model, in which its spin and dynamical degrees of freedom decouple, we compute the exact partition function of the su(m) Polychronakos-Frahm spin chain of D_N type. With the help of this partition function we study several statistical properties of the chain's spectrum, such as the density of energy levels and the distribution of spacings between consecutive levels.
description: 12 pages, 2 figures
PES Web-based Tutorial Series: Understanding Transient Recovery Voltages and Their Measurement in Substations, Session 2: Fault Case Transient Recovery Voltages (Slides)
Creators: Dr. David Peelo & Dr. Farnoosh Rahmatian
Publisher: name: IEEE
Year: 2020

Transient recovery voltages (TRVs) are the voltages imposed on circuit breakers immediately after current interruption. The principal cases of interest are the interruption of the currents associated with terminal faults, short line faults and out-of-phase switching and breaking capacitive and inductive load currents. Each case is discussed in detail explaining the origin and derivation of the attributes associated with the TRVs including pole factors, amplitude factors, two and four parameter representations and travelling waves where applicable. Instrumentation for field measurement of TRVs will be discussed. Practical field issues such as sensor size and location, the challenge of using electric sensors that effectively change the circuit under test will be discussed. Use of optical voltage and current measurement techniques for non-intrusive measurement will be discussed in detail.
Transient recovery voltages (TRVs) are the voltages imposed on circuit breakers immediately after current interruption. The principal cases of interest are the interruption of the currents associated with terminal faults, short line faults and out-of-phase switching and breaking capacitive and inductive load currents. Each case is discussed in detail explaining the origin and derivation of the attributes associated with the TRVs including pole factors, amplitude factors, two and four parameter representations and travelling waves where applicable. Instrumentation for field measurement of TRVs will be discussed. Practical field issues such as sensor size and location, the challenge of using electric sensors that effectively change the circuit under test will be discussed. Use of optical voltage and current measurement techniques for non-intrusive measurement will be discussed in detail.
Additional file 1 of Evaluating the structural reform of outpatient psychotherapy in Germany (ES-RiP trial) - a qualitative study of provider perspectives
Creators: name: Poß-Doering, Regina
name: Hegelow, Martin
name: Borchers, Milena
name: Hartmann, Mechthild
name: Kruse, Johannes
name: Kampling, Hanna
name: Heuft, Gereon
name: Spitzer, Carsten
name: Wild, Beate
name: Szecsenyi, Joachim
name: Friederich, Hans-Christoph
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: 111714 Mental Health
subject: FOS: Health sciences
subject: Computational Biology

description: Additional file 1. Focus group and interview guide for General Practitioners and Psychotherapists. Evaluation of reorganization of mental healthcare in Germany (ES-RiP).
A constant-factor approximation for multi-covering with disks
Creators: name: Bhowmick, Santanu
name: Varadarajan, Kasturi
name: Xue, Shi-Ke
Publisher: name: Journal of Computational Geometry
Year: 2015

description: We consider variants of the following multi-covering problem with disks. We are given two point sets $Y$ (servers) and $X$ (clients) in the plane, a coverage function $\kappa :X \rightarrow \mathbb{N}$, and a constant $\alpha \geq 1$. Centered at each server is a single disk whose radius we are free to set. The requirement is that each client $x \in X$ be covered by at least $\kappa(x)$ of the server disks. The objective function we wish to minimize is the sum of the $\alpha$-th powers of the disk radii. We present a polynomial time algorithm for this problem achieving an $O(1)$ approximation.
description: Journal of Computational Geometry, Vol. 6 No. 1 (2015)
Intermediate Luminosity Type Iax SN 2019muj With Narrow Absorption Lines: Long-Lasting Radiation Associated With a Possible Bound Remnant Predicted by the Weak Deflagration Model
Creators: name: Kawabata, Miho
name: Maeda, Keiichi
name: Yamanaka, Masayuki
name: Nakaoka, Tatsuya
name: Kawabata, Koji S.
name: Aoki, Kentaro
name: Anupama, G. C.
name: Burgaz, Umut
name: Dutta, Anirban
name: Isogai, Keisuke
name: Kino, Masaru
name: Kojiguchi, Naoto
name: Kota, Iida
name: Kumar, Brajesh
name: Kuroda, Daisuke
name: Maehara, Hiroyuki
name: Matsubayashi, Kazuya
name: Morihana, Kumiko
name: Murata, Katsuhiro L.
name: Ohshima, Tomohito
name: Otsuka, Masaaki
name: Sahu, Devendra K.
name: Singh, Avinash
name: Sugitani, Koji
name: Takahashi, Jun
name: Takagi, Kengo
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present comprehensive spectroscopic and photometric analyses of the intermediate luminosity Type Iax supernova (SN Iax) 2019muj based on multi-band datasets observed through the framework of the OISTER target-of-opportunity program. SN 2019muj exhibits almost identical characteristics with the subluminous SNe Iax 2008ha and 2010ae in terms of the observed spectral features and the light curve evolution at the early phase, except for the peak luminosity. The long-term observations unveil the flattening light curves at the late time as seen in a luminous SN Iax 2014dt. This can be explained by the existence of an inner dense and optically-thick component possibly associated with a bound white dwarf remnant left behind the explosion. We demonstrate that the weak deflagration model with a wide range of the explosion parameters can reproduce the late-phase light curves of other SNe Iax. Therefore, we conclude that a common explosion mechanism operates for different subclass SNe Iax.
description: 37 pages, 22 figures, 6 tables, accepted for publication in PASJ
Slides: Texas Electric Power Crisis
Creators: Massoud Amin
Wei-jen Lee
Panos Moutis
Doug Houseman
Steve Collier
and Peter Wung
Publisher: name: IEEE
Year: 2021

Slides for Panel - Power Crisis in Texas
The cold spell that hit the nation in February 2021 wreaked havoc with the electric power generation and delivery system in the United States, putting large numbers of customers under rolling blackouts and long periods of power outages. The focus has been especially glaring and harsh for electric power grid in Texas.

Listen to the group of electric utility experts analyze the situation and provide their unique perspectives. The intent is to delve into the realities of the situation as well as discuss how the Smart Grid could have been helpful to mitigate the dire effects.

The discussion is moderated by Peter Wung, PhD, Chair of the IEEE Smart Grid and adjunct Professor at University of Dayton.
2020 PES GM 8/5 Misc. Panel Session Presentations pt. 2
Creators: N. Singhal
E. G. Ela
K. Bruninx
X. Wang
P. Pineau
J. Glass
P. Chiasson
Publisher: name: IEEE
Year: 2020

The following presentations are included in this product:
- Reliability and Economic Efficiency of Various Hybrid Resource Participation Models by: N. Singhal and E. G. Ela
- On Aggregators, Electricity markets and Residential Demand Response Providers by: K. Bruninx
- Remote Teaching Power Engineering Courses at Carleton University by: X. Wang
- Deep Decarbonization in Northeastern North America: Hydropower and the Value of Electricity Market Integration by: P. Pineau
- The Role of DMS/ADMS in Mitigating Anomalous Distribution Grid Operations by: J. Glass
- Hydro-Québec’sexperienceusingReal-Time Simulator and Hardware-in-the-loop(HIL) for HVDC projects by: P. Chiasson, ing.
2020 PES GM 8/5 Misc. Panel Session Presentations pt. 1
Creators: X. Zhang
P. Ribeiro
Y. Zhang
Dr. I. Kockar
C. Murphy
P. Balducci
Publisher: name: IEEE
Year: 2020

The following presentations are included in this product:
- Autonomous (P2P) Energy Trading within Distribution Networks Based on Blockchain by: X. Zhang
- Systems Engineering Side Holistic Normative Engineering Design For SmarterGrids andCities by: P. Ribeiro
- LSTM-Based Dynamic Frequency Prediction by: Y. Zhang
- Emerging Architectures for Integration and Coordination of High Levels of Distributed Energy Resources: A view from Europe by: Dr. I. Kockar
- Electrification Futures Study: Opportunities for 2050 by: C. Murphy
- Assessing the Value of High Capacity Energy Storage by: P. Balducci
Conditional probabilities with Dirac observables and the problem of time in quantum gravity
Creators: name: Gambini, Rodolfo
name: Porto, Rafael
name: Torterolo, Sebastian
name: Pullin, Jorge
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We combine the "evolving constants" approach to the construction of observables in canonical quantum gravity with the Page--Wootters formulation of quantum mechanics with a relational time for generally covariant systems. This overcomes the objections levied by Kuchař against the latter formalism. The construction is formulated entirely in terms of Dirac observables, avoiding in all cases the physical observation of quantities that do not belong in the physical Hilbert space. We work out explicitly the example of the parameterized particle, including the calculation of the propagator. The resulting theory also predicts a fundamental mechanism of decoherence.
description: 4 pages, no figures, RevTex
Enhancing exploration algorithms for navigation with visual SLAM
Creators: name: Muravyev, Kirill
name: Bokovoy, Andrey
name: Yakovlev, Konstantin
Publisher: name: arXiv
Year: 2021
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: Exploration is an important step in autonomous navigation of robotic systems. In this paper we introduce a series of enhancements for exploration algorithms in order to use them with vision-based simultaneous localization and mapping (vSLAM) methods. We evaluate developed approaches in photo-realistic simulator in two modes: with ground-truth depths and neural network reconstructed depth maps as vSLAM input. We evaluate standard metrics in order to estimate exploration coverage.
description: Camera-ready version as submitted to RNCAI 2021 conference
D-Branes in Orientifolds and Orbifolds and Kasparov KK-Theory
Creators: name: Garcia-Compean, H.
name: Herrera-Suarez, W.
name: Itza-Ortiz, B. A.
name: Loaiza-Brito, O.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: A classification of D-branes in Type IIB Op^- orientifolds and orbifolds in terms of Real and equivariant KK-groups is given. We classify D-branes intersecting orientifold planes from which are recovered some special limits as the spectrum for D-branes on top of Type I Op^- orientifold and the bivariant classification of Type I D-branes. The gauge group and transformation properties of the low energy effective field theory living in the corresponding unstable D-brane system are computed by extensive use of Clifford algebras. Some speculations about the existence of other versions of KK-groups, based on physical insights, are proposed. In the orbifold case, some known results concerning D-branes intersecting orbifolds are reproduced and generalized. Finally, the gauge theory of unstable systems in these orbifolds is recovered.
description: 42 pages, 4 figures
An Interaction Potential for Atomic Simulations of Conventional High Explosives
Creators: name: Heim, Andrew J.
name: Gronbech-Jensen, Niels
name: Kober, Edward M.
name: Erpenbeck, Jerome J.
name: Germann, Timothy C.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: In an effort to develop a chemically reactive interaction potential suitable for application to the study of conventional, organic explosives, we have modified the diatomic AB potential of Brenner et al. such that it exhibits improved detonation characteristics. In particular, equilibrium molecular dynamics (MD) calculations of the modified potential demonstrate that the detonation products have an essentially diatomic, rather than polymeric, composition and that the detonation Hugoniot has the classic, concave-upward form. Nonequilibrium MD calculations reveal the separation of scales between chemical and hydrodynamic effects essential to the Zeldovitch, von Neumann, and Doering theory.
description: 9 pages, 13 figures, 2 tables. Submitted to PRE
Additional file 1 of Evaluating the structural reform of outpatient psychotherapy in Germany (ES-RiP trial) - a qualitative study of provider perspectives
Creators: name: Regina, Poß-Doering
name: Martin, Hegelow
name: Milena, Borchers
name: Mechthild, Hartmann
name: Johannes, Kruse
name: Hanna, Kampling
name: Gereon, Heuft
name: Carsten, Spitzer
name: Beate, Wild
name: Joachim, Szecsenyi
name: Hans-Christoph, Friederich
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: 111714 Mental Health
subject: FOS: Health sciences
subject: Computational Biology

description: Additional file 1. Focus group and interview guide for General Practitioners and Psychotherapists. Evaluation of reorganization of mental healthcare in Germany (ES-RiP).
Simulations of a Scintillator Compton Gamma Imager for Safety and Security
Creators: name: Sinclair, L. E.
name: Hanna, D. S.
name: MacLeod, A. M. L.
name: Saull, P. R. B.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: We are designing an all-scintillator Compton gamma imager for use in security investigations and remediation actions involving radioactive threat material. To satisfy requirements for a rugged and portable instrument, we have chosen solid scintillator for the active volumes of both the scatter and absorber detectors. Using the BEAMnrc/EGSnrc Monte Carlo simulation package, we have constructed models using four different materials for the scatter detector: LaBr_3, NaI, CaF_2 and PVT. We have compared the detector performances using angular resolution, efficiency, and image resolution. We find that while PVT provides worse performance than that of the detectors based entirely on inorganic scintillators, all of the materials investigated for the scatter detector have the potential to provide performance adequate for our purposes.
description: Revised text and figures, Presented at SORMA West 2008, Published in IEEE Transactions on Nuclear Science
FreeStyleGAN: Free-view Editable Portrait Rendering with the Camera Manifold
Creators: name: Leimkühler, Thomas
name: Drettakis, George
Publisher: name: arXiv
Year: 2021
Subjects: subject: Graphics (cs.GR)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Current Generative Adversarial Networks (GANs) produce photorealistic renderings of portrait images. Embedding real images into the latent space of such models enables high-level image editing. While recent methods provide considerable semantic control over the (re-)generated images, they can only generate a limited set of viewpoints and cannot explicitly control the camera. Such 3D camera control is required for 3D virtual and mixed reality applications. In our solution, we use a few images of a face to perform 3D reconstruction, and we introduce the notion of the GAN camera manifold, the key element allowing us to precisely define the range of images that the GAN can reproduce in a stable manner. We train a small face-specific neural implicit representation network to map a captured face to this manifold and complement it with a warping scheme to obtain free-viewpoint novel-view synthesis. We show how our approach - due to its precise camera control - enables the integration of a pre-trained StyleGAN into standard 3D rendering pipelines, allowing e.g., stereo rendering or consistent insertion of faces in synthetic 3D environments. Our solution proposes the first truly free-viewpoint rendering of realistic faces at interactive rates, using only a small number of casual photos as input, while simultaneously allowing semantic editing capabilities, such as facial expression or lighting changes.
description: Project webpage: https://repo-sam.inria.fr/fungraph/freestylegan/
The Spin-Orbit Alignment of the HD17156 Transiting Eccentric Planetary System
Creators: name: Cochran, William D.
name: Redfield, Seth
name: Endl, Michael
name: Cochran, Anita L.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present high precision radial velocity observations of HD17156 during a transit of its eccentric Jovian planet. In these data, we detect the Rossiter-McLaughlin effect, which is an apparent perturbation in the velocity of the star due to the progressive occultation of part of the rotating stellar photosphere by the transiting planet. This system had previously been reported by Narita et al. (2008) to exhibit a lambda = 62 +/- 25 degree misalignment of the projected planetary orbital axis and the stellar rotation axis. We model our data, along with the Narita et al. data, and obtain lambda = 9.4 +/- 9.3 degrees for the combined data set. We thus conclude that the planetary orbital axis is actually very well aligned with the stellar rotation axis.
description: 4 pages, 1 figure, Ap.J. Letters in press
X-ray photoelectron spectroscopy of gaseous atoms and molecules
Creators: name: Perera, Josage Sudharman Henry Quintus
Publisher: name: University of British Columbia
Year: 2010

description: A versatile gas phase x-ray photoelectron spectrometer employing a PDP 8/e minicomputer to control the spectrometer functions and data accumulation is described. Facilities for heating materials inside the spectrometer to ~1000°C are currently available, and the advantages of such are suitably demonstrated. Core level x-ray photoelectron spectra of the Group IA metal atoms, sodium, potassium, rubidium, cesium and the Group IIA metal atoms, magnesium, calcium, strontium, and barium have been obtained. These provide the first accurate measurements of the core binding energies for several of these elements. Experimental and theoretical values from the literature are compared with the present results. The free atom binding energies are found to be greater than the comparative solid state binding energies. The experimental "phase transition shifts" are compared with various theoretical estimates. Multielectron excitation satellites are also observed in the spectra of all these atoms. Those observed for the alkali metal atoms are assigned to ns ￫ (n+1)s type monopole excitations using the equivalent cores approximation. This approximation fails to provide a satisfactory assignment of the satellites observed in the spectra of Group IIA atoms. X-ray photoelectron spectra of the Ti 2p and 3p levels, and the halogen core levels of the gaseous titanium tetrahalides, TiX₄ (X=F,Cl,Br,I), are reported. Satellites are observed to higher binding energies from the halogen core levels, as well as the titanium np levels. The origin of these satellites is discussed in some detail. Gas phase x-ray photoelectron spectra of some transition metal acetylacetonates, M(AcAc)₂ (M=Co(II), Ni(II), Cu(II))j have been investigated. The metal 2p, 3s, and 3p core levels and the O Is and C Is binding energies have been accurately determined. Satellite structure is observed at higher binding energies from the metal 2p, 3s and 3p levels, and the O Is levels. From a comparison of the solid phase with the present gas phase results, the effects of changes in symmetry upon satellite structure were studied without changing the central metal atom or the ligand. The results indicate that the satellites seen in these transition metal 3s spectra, at binding energies 4-6eV higher than the main peak, arise from multielectron excitations rather than from multiplet splitting.
Strong Violation of Critical Phenomena Universality: Wang-Landau Study of the 2d Blume-Capel Model under Bond Randomness
Creators: name: Malakis, A.
name: Berker, A. Nihat
name: Hadjiagapiou, I. A.
name: Fytas, N. G.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We study the pure and random-bond versions of the square lattice ferromagnetic Blume-Capel model, in both the first-order and second-order phase transition regimes of the pure model. Phase transition temperatures, thermal and magnetic critical exponents are determined for lattice sizes in the range L=20-100 via a sophisticated two-stage numerical strategy of entropic sampling in dominant energy subspaces, using mainly the Wang-Landau algorithm. The second-order phase transition, emerging under random bonds from the second-order regime of the pure model, has the same values of critical exponents as the 2d Ising universality class, with the effect of the bond disorder on the specific heat being well described by double-logarithmic corrections, our findings thus supporting the marginal irrelevance of quenched bond randomness. On the other hand, the second-order transition, emerging under bond randomness from the first-order regime of the pure model, has a distinctive universality class with ν=1.30(6) and β/ν=0.128(5). This amounts to a strong violation of the universality principle of critical phenomena, since these two second-order transitions, with different sets of critical exponents, are between the same ferromagnetic and paramagnetic phases. Furthermore, the latter of these two transitions supports an extensive but weak universality, since it has the same magnetic critical exponent (but a different thermal critical exponent) as a wide variety of two-dimensional systems. In the conversion by bond randomness of the first-order transition of the pure system to second order, we detect, by introducing and evaluating connectivity spin densities, a microsegregation that also explains the increase we find in the phase transition temperature under bond randomness.
description: Added discussion and references. 10 pages, 6 figures. Published version
Signatures of Bardasis-Schrieffer mode excitation in Third-Harmonic generated currents
Creators: name: Müller, Marvin A.
name: Eremin, Ilya M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Quantum Gases (cond-mat.quant-gas)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We theoretically analyze the collective modes in unconventional superconductors focusing on Bardasis-Schrieffer (BS) mode and its contribution to the third harmonic generation currents. Starting from a model with competing superconducting pairing instabilities we add fluctuations of the fields beyond saddle point approximation and calculate their response to an applied pulsed electric field. To model phase fluctuations appropriately we take into account the effect of the long-range Coulomb interaction. While the phase mode is pushed into a plasmon frequency, as known from the literature, we show that the BS mode remains unaffected. Furthermore, it has a characteristic polarization dependence and, unlike the Higgs mode, generates a current in perpendicular direction to the applied field. We find that the Bardasis-Schrieffer excitations contribute a sizable signal to the third harmonic generated current, which is clearly distinguishable from the charge density fluctuations due to Cooper pair breaking effects and can be straightforwardly detected in experiment.
description: 12 pages, 3 figures
Supernova Nucleosynthesis in the Early Universe
Creators: name: Tominaga, Nozomu
name: Umeda, Hideyuki
name: Maeda, Keiichi
name: Nomoto, Ken'ichi
name: Iwamoto, Nobuyuki
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The first metal enrichment in the universe was made by supernova (SN) explosions of population (Pop) III stars. The trace remains in abundance patterns of extremely metal-poor (EMP) stars. We investigate the properties of nucleosynthesis in Pop III SNe by means of comparing their yields with the abundance patterns of the EMP stars. We focus on (1) jet-induced SNe with various energy deposition rates [$\dot{E}_{\rm dep}=(0.3-1500)\times10^{51}{\rm ergs s^{-1}}$], and (2) SNe of stars with various main-sequence masses ($M_{\rm ms}=13-50M_\odot$) and explosion energies [$E=(1-40)\times10^{51}$ergs]. The varieties of Pop III SNe can explain varieties of the EMP stars: (1) higher [C/Fe] for lower [Fe/H] and (2) trends of abundance ratios [X/Fe] against [Fe/H].
description: 5 pages, 4 figures. To appear in "Low-Metallicity Star Formation: From the First Stars to Dwarf Galaxies", Proceedings of IAU Symposium 255 (June 2008, Rapallo), eds. L.K. Hunt, S. Madden, & R. Schneider (Cambridge Univ. Press)
Physical evidence for a universal cloverleaf structure for 5S RNA and 5.8S RNA
Creators: name: Luoma, Gregory Allan
Publisher: name: University of British Columbia
Year: 2010

description: A number of structures had been previously proposed for prokaryotic 5S RNA, eukaryotic 5S RNA and eukaryotic 5.8S RNA based on a minimal amount of experimental evidence. None of the models could be adapted to all 5S RNA and 5.8S RNA species, although experimental evidence suggested similar structures. Therefore, a cloverleaf structure was proposed, based on laser Raman evidence (G.A. Luoma, M. Sc. Thesis). This structure could be adapted to E. coli 5S RNA, S. cerevisiae 5S RNA and S. cerevisiae 5.8S RNA while satisfying the limited amount of experimental evidence. To increase the experimental structural data, ultraviolet spectroscopy, circular dichroism spectroscopy, low field proton nuclear magnetic resonance spectroscopy and electron spin resonance spectroscopy were performed on S. cerevisiae 5S RNA, E. coli 5S RNA and wheat germ 5S RNA. Also, 5-fluorouracil was incorporated into S. cerevisiae 5S RNA to attempt to obtain further structural evidence. Finally, the presence of multiple conformations in the 5S RNA species was determined. This substantial physical characterisation is in total support of the cloverleaf model for these 5S RNA species. The cloverleaf model has also been adapted to all known sequences of 5S RNA and 5.8S RNA. For eukaryotic 5S RNA, the cloverleaf can explain the evolution of the various species. For prokaryotic 5S RNA, the cloverleaf can explain the inter-conversion of the native and B-form conformers. Finally, for 5.8S RNA, the cloverleaf model can explain the ability of yeast 5.8S RNA and E. coli 5S RNA to bind the same ribosomal proteins.
Simple Glass Models and their Quantum Annealing
Creators: name: Jorg, Thomas
name: Krzakala, Florent
name: Kurchan, Jorge
name: Maggs, A. C.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We study first order quantum phase transitions in mean-field spin glasses. We solve the quantum Random Energy Model using elementary methods and show that at the transition the eigenstate suddenly projects onto the unperturbed ground state and that the gap between the lowest states is exponentially small in the system size. We argue that this is a generic feature of all `Random First Order' models, which includes benchmarks such as random satisfiability. We introduce a two-time instanton to calculate this gap in general, and discuss the consequences for quantum annealing.
description: 4 pages, 3 figures, minor typos corrected
Evidence of Shock-Driven Turbulence in the Solar Chromosphere
Creators: name: Reardon, K. P.
name: Lepreti, F.
name: Carbone, V.
name: Vecchio, A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We study the acoustic properties of the solar chromosphere in the high-frequency regime using a time sequence of velocity measurements in the chromospheric Ca II 854.2 nm line taken with the Interferometric Bidimensional Spectrometer (IBIS). We concentrate on quiet-Sun behavior, apply Fourier analysis, and characterize the observations in terms of the probability density functions (PDFs) of velocity increments. We confirm the presence of significant oscillatory fluctuation power above the cutoff frequency and find that it obeys a power-law distribution with frequency up to our 25 mHz Nyquist limit. The chromospheric PDFs are non-Gaussian and asymmetric and they differ among network, fibril, and internetwork regions. This suggests that the chromospheric high-frequency power is not simply the result of short-period waves propagating upward from the photosphere but rather is the signature of turbulence generated within the chromosphere from shock oscillations near the cutoff frequency. The presence of this pervasive and broad spectrum of motions in the chromosphere is likely to have implications for the excitation of coronal loop oscillations.
Design of hazard based model and collision avoidance system
Creators: name: Kabir, Md Faysal
name: Roy, Sahadev
Publisher: name: arXiv
Year: 2021
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: The primary goal of this paper is to examine the motorcyclists' activities during the overtaking period, as well as to develop a model of total overtaking time. For the experimental study, instrumented motorcycles were used to collect data and design an overall overtaking period model. The possibility of death during an attempt to overtake is maximum for people walking on rural roads, mainly identified by a scarcity of pathways and higher speeds of vehicles. It is important to recognize and prototype driver actions during the overtaking moves to set up collision avoidance strategies in order to prevent these collisions, such that device adjustments are acceptable as they occur beyond the comfort zone of the drivers. The purpose of this research is to address both vehicle overtaking movements along urban roads and to develop a collision avoidance system. This research, based on tests performed and instrumented driving information, may lead to the discovery of advanced driver assistance systems, analyzing driver behavior during overtaking. A total of 500 overtaking movements were registered with 50 motorcycles set up with a high-resolution camera and GPS system implemented by 50 professional bikers in India in an undivided one-way road. A technique was developed to collect data explaining the actions of the motorcyclists, based on video and GPS analyses. The overall overtaking period was designed using a risk-based model, which indicates the span of the overtaking based on several coefficients. The proposed model is useful to analyze the behavior during overtaking moves, as well as to develop road and vehicle safety systems to reduce the chances of accidents.
Resonances and Unitarity in Weak Boson Scattering at the LHC
Creators: name: Alboteanu, Ana
name: Kilian, Wolfgang
name: Reuter, Juergen
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: A crucial test of the Standard Model is the measurement of electroweak gauge-boson scattering. In this paper, we describe a generic parameterization aimed at a realistic simulation of weak-boson scattering at the LHC. The parameterization implements resonances of all possible spin and isospin combinations, properly matched to the low-energy effective (chiral) Lagrangian, includes leading higher-order effects and contains a minimal unitarization scheme. We implement the parameterization in the Monte-Carlo event generator WHIZARD and present results for complete partonic cross-section integration and event generation. We provide a comparison with the effective W approximation that previously has been used for most WW scattering studies at hadron colliders.
description: 49 pages, 15 figures
Solution of Master Equations for the anharmonic oscillator interacting with a heat bath and for parametric down conversion process
Creators: name: Arévalo-Aguilar, L. M.
name: Juárez-Amaro, R.
name: Vargas-Martínez, J. M.
name: Aguilar-Loreto, O.
name: Moya-Cessa, H.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We solve analytically master equations that describe a cavity filled with a kerr medium, taking into account the dissipation induced by the environment, and parametric down conversion processes. We use superoperator techniques.
description: 5 pages, 1 table, no figures
The uGMRT observations of three new GPS pulsars
Creators: name: Rożko, K.
name: Basu, R.
name: Kijak, J.
name: Lewandowski, W.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We report the detailed spectral measurements over a wide frequency range of three pulsars: J1741-3016, J1757-2223 and J1845-0743, using the Giant Metrewave Radio Telescope, which allowed us to identify them as a new gigahertz-peaked spectra pulsars. Our results indicate that their spectra show turnovers at frequencies of 620 MHz, 640 MHz and 650 MHz, respectively. Our analysis proves that wide-band observations improve the estimation of the spectral nature using a free-free thermal absorption model and thus allow a more accurate approximation of the maximum energy in the spectrum. While there is no evidence as of yet that these objects are associated with a supernova remnant or pulsar wind nebula, they are good targets for looking for interesting environments in the future, more sensitive sky surveys.
description: Accepted to ApJ
Magnetic behaviour of PrPd2B2C
Creators: name: Anand, V. K.
name: Chaudhuri, A.
name: Dhar, S. K.
name: Geibel, C.
name: Hossain, Z.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We have synthesized a new quaternary borocarbide PrPd$_{2}$B$_{2}$C and measured its magnetization, electrical resistivity and specific heat. The compound crystallizes in the LuNi$_{2}$B$_{2}$C-type tetragonal structure (space group {\it I4/mmm}). Above 100 K the magnetic susceptibility follows Curie-Weiss behavior with effective moment $μ_{eff}$ = 3.60 $μ_{B}$, which is very close to the value expected for Pr$^{3+}$ ions. We do not find evidence for magnetic or superconducting transition down to 0.5 K. Specific heat exhibits a broad Schottky type anomaly with a peak at 24 K, very likely related to crystal electric field (CEF) excitation. The magnetic properties suggest the presence of a singlet CEF ground state leading to a Van-Vleck paramagnetic ground state.
description: 2 pages, 2 figures
Molecular Dynamics Simulations of Detonation Instability
Creators: name: Heim, Andrew J.
name: Gronbech-Jensen, Niels
name: Kober, Edward M.
name: Germann, Timothy C.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: After making modifications to the Reactive Empirical Bond Order potential for Molecular Dynamics (MD) of Brenner et al. in order to make the model behave in a more conventional manner, we discover that the new model exhibits detonation instability, a first for MD. The instability is analyzed in terms of the accepted theory.
description: 7 pages, 6 figures. Submitted to Phys. Rev. E Minor edits. Removed parenthetical statement about P^\nu from conclusions