cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Antiferromagnetic Ising model in an imaginary magnetic field
Creators: name: Azcoiti, Vicente
name: Di Carlo, Giuseppe
name: Follana, Eduardo
name: Royo-Amondarain, Eduardo
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We study the two-dimensional antiferromagnetic Ising model with a purely imaginary magnetic field, which can be thought of as a toy model for the usual $θ$ physics. Our motivation is to have a benchmark calculation in a system which suffers from a strong sign problem, so that our results can be used to test Monte Carlo methods developed to tackle such problems. We analyze here this model by means of analytical techniques, computing exactly the first eight cumulants of the expansion of the effective Hamiltonian in powers of the inverse temperature, and calculating physical observables for a large number of degrees of freedom with the help of standard multi-precision algorithms. We report accurate results for the free energy density, internal energy, standard and staggered magnetization, and the position and nature of the critical line, which confirm the mean-field qualitative picture, and which should be quantitatively reliable, at least in the high-temperature regime, including the entire critical line.
Quantum Hall ferroelectrics and nematics in multivalley systems
Creators: name: Sodemann, Inti
name: Zhu, Zheng
name: Fu, Liang
Publisher: name: arXiv
Year: 2017
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study broken symmetry states at integer Landau level fillings in multivalley quantum Hall systems whose low energy dispersions are anisotropic. When the Fermi surface of individual pockets lacks twofold rotational symmetry, like in Bismuth (111) and in Sn$_{1-x}$Pb$_x$Se (001) surfaces, interactions tend to drive the formation of quantum Hall ferroelectric states. We demonstrate that the dipole moment in these states has an intimate relation to the Fermi surface geometry of the parent metal. In quantum Hall nematic states, like those arising in AlAs quantum wells, we demonstrate the existence of unusually robust skyrmion quasiparticles.
description: 15 pages, 9 figures
Dimension Formulae in Genus Zero and Uniqueness of Vertex Operator Algebras
Creators: name: van Ekeren, Jethro
name: Möller, Sven
name: Scheithauer, Nils R.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantum Algebra (math.QA)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: 17B69

description: We prove a dimension formula for orbifold vertex operator algebras of central charge 24 by automorphisms of order $n$ such that $Γ_0(n)$ is a genus zero group. We then use this formula together with the inverse orbifold construction for automorphisms of orders 2, 4, 5, 6 and 8 to establish that each of the following fifteen Lie algebras is the weight-one space $V_1$ of exactly one holomorphic, $C_2$-cofinite vertex operator algebra $V$ of CFT-type of central charge 24: $A_5C_5E_{6,2}$, $A_3A_{7,2}C_3^2$, $A_{8,2}F_{4,2}$, $B_8E_{8,2}$, $A_2^2A_{5,2}^2B_2$, $C_8F_4^2$, $A_{4,2}^2C_{4,2}$, $A_{2,2}^4D_{4,4}$, $B_5E_{7,2}F_4$, $B_4C_6^2$, $A_{4,5}^2$, $A_4A_{9,2}B_3$, $B_6C_{10}$, $A_1C_{5,3}G_{2,2}$ and $A_{1,2}A_{3,4}^3$.
description: 42 pages, LaTeX; changed numbering to match published version; to appear in Int. Math. Res. Not
Anisotropy and suppression of spin--orbit interaction in a GaAs double quantum dot
Creators: name: Hofmann, Andrea
name: Maisi, Ville F.
name: Krähenmann, Tobias
name: Reichl, Christian
name: Wegscheider, Werner
name: Ensslin, Klaus
name: Ihn, Thomas
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The spin-flip tunneling rates are measured in GaAs-based double quantum dots by time-resolved charge detection. Such processes occur in the Pauli spin blockade regime with two electrons occupying the double quantum dot. Ways are presented for tuning the spin-flip tunneling rate, which on the one hand gives access to measuring the Rashba and Dresselhaus spin--orbit coefficents. On the other hand they make it possible to turn on and off the effect of SOI with a high on/off-ratio. The tuning is accomplished by choosing the alignment of the tunneling direction with respect to the crystallographic axes, as well as by choosing the orientation of the external magnetic field with respect to the spin--orbit magnetic field. Spin-lifetimes of 10 s are achieved at a tunnel rate close to 1 kHz.
description: 5 pages, 4 figures, accepted for publication in PRL
Reduktion von Umweltstandards durch Energieversorgungssicherheit: Windkraft – Kohle – Kernkraft
Creators: name: Frenz, Walter
Publisher: name: RWTH Aachen University
Year: 2023

description: Deutscher Anwaltstag, Wiesbaden, Germany, 14 Jun 2023 - 16 Jun 2023; 13 Folien (2023).
Radical chiral Floquet phases in a periodically driven Kitaev model and beyond
Creators: name: Po, Hoi Chun
name: Fidkowski, Lukasz
name: Vishwanath, Ashvin
name: Potter, Andrew C.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: Time periodic driving serves not only as a convenient way to engineer effective Hamiltonians, but also as a means to produce intrinsically dynamical phases that do not exist in the static limit. A recent example of the latter are 2D chiral Floquet (CF) phases exhibiting anomalous edge dynamics that pump discrete packets of quantum information along one direction. In non-fractionalized systems with only bosonic excitations, this pumping is quantified by a dynamical topological index that is a rational number -- highlighting its difference from the integer valued invariant underlying equilibrium chiral phases (e.g. quantum Hall systems). Here, we explore CF phases in systems with emergent anyon excitations that have fractional statistics (Abelian topological order). Despite the absence of mobile non-Abelian particles in these systems, external driving can supply the energy to pump otherwise immobile non-Abelian defects (sometimes called twist defects or genons) around the boundary, thereby transporting an irrational fractional number of quantum bits along the edge during each drive period. This enables new CF phases with chiral indices that are square roots of rational numbers, inspiring the label: "radical CF phases". We demonstrate an unexpected bulk-boundary correspondence, in which the radical CF edge is tied to bulk dynamics that exchange electric and magnetic anyon excitations during each period. We construct solvable, stroboscopically driven versions of Kitaev's honeycomb spin model that realize these radical CF phases, and discuss their stability against heating in strongly disordered many-body localized settings or in the limit of rapid driving as an exponentially long-lived pre-thermal phenomena.
description: 4+8 pages, 3 figures; published version
Path-integral formalism for stochastic resetting: Exactly solved examples and shortcuts to confinement
Creators: name: Roldán, Édgar
name: Gupta, Shamik
Publisher: name: arXiv
Year: 2017
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study the dynamics of overdamped Brownian particles diffusing in conservative force fields and undergoing stochastic resetting to a given location with a generic space-dependent rate of resetting. We present a systematic approach involving path integrals and elements of renewal theory that allows to derive analytical expressions for a variety of statistics of the dynamics such as (i) the propagator prior to first reset; (ii) the distribution of the first-reset time, and (iii) the spatial distribution of the particle at long times. We apply our approach to several representative and hitherto unexplored examples of resetting dynamics. A particularly interesting example for which we find analytical expressions for the statistics of resetting is that of a Brownian particle trapped in a harmonic potential with a rate of resetting that depends on the instantaneous energy of the particle. We find that using energy-dependent resetting processes is more effective in achieving spatial confinement of Brownian particles on a faster timescale than by performing quenches of parameters of the harmonic potential.
description: v2: Paper expanded to include new results on shortcuts to confinement, title modified, accepted for publication in Phys. Rev. E (2017)
Robust short-range-ordered nematicity in FeSe evidenced by high-pressure NMR
Creators: name: Wang, P. S.
name: Zhou, P.
name: Sun, S. S.
name: Cui, Y.
name: Li, T. R.
name: Lei, Hechang
name: Wang, Ziqiang
name: Yu, Weiqiang
Publisher: name: arXiv
Year: 2017
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We report high-pressure $^{77}$Se NMR studies on FeSe single crystals that reveal a prominent inhomogeneous NMR linewidth broadening upon cooling, with the magnetic field applied along the tetragonal [110] direction. The data indicate the existence of short-range-ordered, inhomogeneous electronic nematicity, which has surprisingly long time scales over milliseconds. The short-range order survives temperatures up to $8$ times the structural transition temperature, and remains robust against pressure, in contrast to the strong pressure-dependence of the orbital ordering, structural transition, and the ground state magnetism. Such an extended region of static nematicity in the ($P$,$T$) space of FeSe indicates an enormously large fluctuating regime, and provide fresh insights and constraints to the understanding of electronic nematicity in iron-based superconductors.
description: To appear in PRB
Witnessing a Poincaré recurrence with Mathematica
Creators: name: Zhang, J. M.
name: Liu, Y.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The often elusive Poincaré recurrence can be witnessed in a completely separable system. For such systems, the problem of recurrence reduces to the classic mathematical problem of simultaneous Diophantine approximation of multiple numbers. The latter problem then can be somewhat satisfactorily solved by using the famous Lenstra-Lenstra-Lovász (LLL) algorithm, which is implemented in the Mathematica built-in function \verb"LatticeReduce". The procedure is illustrated with a harmonic chain. The incredibly large recurrence times are obtained exactly. They follow the expected scaling law very well.
description: 8 pages, 5 figures
Flux-closure domains in high aspect ratio electroless-deposited CoNiB nanotubes
Creators: name: Staňo, Michal
name: Schaefer, Sandra
name: Wartelle, Alexis
name: Rioult, Maxime
name: Belkhou, Rachid
name: Sala, Alessandro
name: Menteş, Tevfik Onur
name: Locatelli, Andrea
name: Cagnon, Laurent
name: Trapp, Beatrix
name: Bochmann, Sebastian
name: Martin, Sylvain
name: Gautier, Eric
name: Toussaint, Jean-Christophe
name: Ensinger, Wolfgang
name: Fruchart, Olivier
Publisher: name: arXiv
Year: 2017
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We report the imaging of magnetic domains in ferromagnetic CoNiB nanotubes with very long aspect ratio, fabricated by electroless plating. While axial magnetization is expected for long tubes made of soft magnetic materials, we evidence series of azimuthal domains. We tentatively explain these by the interplay of anisotropic strain and/or grain size, with magneto-elasticity and/or anisotropic interfacial magnetic anisotropy. This material could be interesting for dense data storage, as well as curvature-induced magnetic phenomena such as the non-reciprocity of spin-wave propagation.
description: Focus only on azimuthal domains, information on domain walls (part of v1) removed - title, abstract and discussion changed accordingly, tubular racetracks scheme removed; new references, figures. Submission to SciPost (reformatted, new abstract, DOI added to references). Enhanced discussion of anisotropy, disagreement of synchrotron data and magnetometry rectified, new MOKE data added
Identifying Child Anxiety Through Schools-identification to intervention (iCATS-i2i): protocol for single-arm feasibility trial.
Creators: name: Reardon, Tessa
name: Ball, Susan
name: Breen, Maria
name: Brown, Paul
name: Day, Emily
name: Ford, Tamsin
name: Gray, Alastair
name: Green, Iheoma
name: Hill, Claire
name: Jasper, Bec
name: King, Thomas
name: Larkin, Michael
name: Macdonald, Ian
name: Morgan, Fran
name: Pollard, Jack
name: Sancho, Michelle
name: Sniehotta, Falko F
name: Spence, Susan H
name: Stallard, Paul
name: Stainer, Jason
name: Ukoumunne, Obioha C
name: Violato, Mara
name: Williams, Chloe
name: Williamson, Victoria
name: Creswell, Cathy
Publisher: name: Apollo - University of Cambridge Repository
Year: 2022
Subjects: Study Protocol
Anxiety
Children
Screening
Schools
Identification
Early intervention
Online intervention
Parent-led intervention

description: BACKGROUND: Anxiety disorders are common among primary-school aged children, but few affected children receive evidence-based treatment. Identifying and supporting children who experience anxiety problems through schools would address substantial treatment access barriers that families and school staff often face. We have worked with families and school staff to co-design procedures that incorporate screening, feedback for parents, and the offer of a brief intervention in primary schools. This study sets out to assess the feasibility of a subsequent school-based cluster randomised controlled trial to evaluate these procedures. Our objectives are to ensure our procedures for identifying and supporting children with anxiety difficulties through primary schools are acceptable and there are no negative impacts, to estimate recruitment and retention rates, and to identify any changes needed to study procedures or measures. METHODS: We will recruit six primary/junior schools in England (2 classes per school), and invite all children (aged 8-9) (n = 360) and their parent/carer and class teacher in participating classes to take part. Children, parents and class teachers will complete questionnaires at baseline and 12-week follow-up. Children who 'screen positive' on a 2-item parent-report child anxiety screen at baseline will be the target population (expected n = 43). Parents receive feedback on screening questionnaire responses, and where the child screens positive the family is offered support (OSI: Online Support and Intervention for child anxiety). OSI is a brief, parent-led online intervention, supported by short telephone sessions with a Children's Wellbeing Practitioner. Participants' experiences of study procedures will be assessed through qualitative interviews/discussion groups. DISCUSSION: Evidence-based procedures for identifying and supporting children with anxiety difficulties through primary schools would improve children's access to timely, effective intervention for anxiety difficulties. TRIAL REGISTRATION: ISRCTN registry: ISRCTN30032471 . Retrospectively registered on 18 May 2021.
Some Families of Super Congruences Involving Alternating Multiple Harmonic Sums
Creators: name: Chen, Kevin
name: Hong, Rachael
name: Qu, Jerry
name: Wang, David
name: Zhao, Jianqiang
Publisher: name: arXiv
Year: 2017
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11A07, 11B68

description: Let $p$ be a prime. In this short note we study some families of super congruences involving the following alternating sums \begin{equation*} \sum_{\substack{j_1+j_2+\cdots+j_n=2 p^r p\nmid j_1 j_2 \cdots j_n}} \frac{(-1)^{j_1+\cdots+j_b}}{j_1\cdots j_n} \pmod{p^r}, \end{equation*} which extend similar statements proved by Shen and Cai who treated the cases when $n=4,5$.
description: 10 pages, Acta Arithmetica, 2018
Constraints and prospects on GW and neutrino emissions using GW150914
Creators: name: de Vries, Krijn D.
name: de Wasseige, Gwenhaël
name: Frère, Jean-Marie
name: Vereecken, Matthias
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Recently, the LIGO observatory reported the first direct observation of gravitational waves, with a signal consistent with a binary black hole merger. This detection triggered several follow-up searches for coincident emission in electromagnetic waves as well as neutrinos, but no such emission was found. In this article, the implications of the non-detection of counterpart neutrinos are investigated using general arguments. The results are interpreted with a parameter denoting the energy emitted in neutrinos relative to the energy emitted in gravitational waves. The bound on this parameter from the diffuse astrophysical neutrino flux detected by the IceCube Neutrino Observatory is discussed. It is found that, currently, the non-detection of counterpart neutrinos puts a bound comparable to the one from the diffuse astrophysical neutrino flux. This bound is then used to constrain the amount of matter in the black hole binary environment. Finally, the sensitivity to this parameter in future gravitational wave observation runs is investigated. It is shown how the detection of one or more neutrinos from a single merger would strongly constrain the source population and evolution.
description: 12 pages, 5 figures. Added discussion on black hole mass distribution, as well as bounds on source evolution and amount of matter in the BBH environment. Accepted for publication by Phys. Rev. D
Analytical expression for variance of homogeneous-position quantum walk with decoherent position
Creators: name: Annabestani, Mostafa
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We have derived an analytical expression for variance of homogeneous-position decoherent quantum walk (HPDQW) with general form of noise on its position, and have shown that, while the quadratic ($t^2$) term of variance never changes by position decoherency, the linear term ($t$) does and always increases the variance. We study the walker with ability to tunnel out to $d$ nearest neighbors as an example and compare our result with former studies. We also show that, although our expression have been derived for asymptotic case, the rapid decay of time-dependent terms cause the expressions to be correct with a good accuracy even after dozens of steps.
Interaction of a quantum field with a rotating heat bath
Creators: name: Alicki, Robert
name: Jenkins, Alejandro
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantum Physics (quant-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The linear coupling of a rotating heat bath to a quantum field is studied in the framework of the Markovian master equation for the field's non-unitary time evolution. The bath's rotation induces population inversion for the field's low-energy modes. For bosons, this leads to superradiance, an irreversible process in which some of the bath's kinetic energy is extracted by spontaneous and stimulated emission. We find the energy and entropy balance for such systems and apply our results to the theory of black hole radiation. We also comment on how this relates to classical self-oscillations, including shear flow instabilities in hydrodynamics.
description: 20 pages, 1 figure. v2: Appendix added with derivation of field's Markovian master equation. Distinction made between inviscid Kelvin-Helmholtz instability and the more realistic dissipation-induced instability in shear flows that's related to Zel'dovich's superradiance. References improved. To appear in Annals of Physics
Instrument and Training Packages for EBSSO, IPSSO, and VBSSO projects
Creators: name: McCluskey, John
name: Uchida, Craig
name: Feys, Yinthe
name: Solomon, Shellie
Publisher: name: figshare
Year: 2023
Subjects: Criminology not elsewhere classified

description:
 This file repository features a series of codebooks and questionnaires for in-person Environment-based SSO (EBSSO), in-person SSO (IPSSO) of police and Video-based SSO of police (VBSSO). Each Named file is briefly described:
 1 SSO Form on Letterheadb.pdf: This features 15 items that Justice and Security Strategies researchers used to collect data regarding physical disorder during EBSSO observation periods.
 2 SSO Social Indicators This form features 6 items capturing social order and disorder indicators for EBSSO observation periods.
 Dai_37455-0006-Questionnaire-Multi.pdf This is a codebook that accompanies Dr. Dai's VBSSO project archived with the ICPSR in the United States.
 LAPD_Full SSO Instrument_Qualtrics.pdf This file is a capture of the qualtrics instrument deployed by the LAPD-PJ researchers for IPSSO study of the impact of body-worn cameras on police behavior.
 Feys_BOSSD_Codebook.pdf This codebook captures the field instructions and coding for the BOSS-D IPSSO project.
 Doing the Rides_Training_Slides.pdf This is a short slide deck used to prepare observers for the fieldwork, raising common issues, establishing patterns of communication with team leaders, and as a lecture set, would cover do's and don't of behaviors and activities for the LAPD-PJ IPSSO team.
Arche et al - THESIS PAPER.pdf
Creators: name: Arce, Jedidiah
name: Luarez, Rodulfo II
name: Quiseo, Elyssa Marie
name: Ramirez, Janessa Raisa
name: Sanchez, Monique
name: Subingsubing, Giovanni
Publisher: name: figshare
Year: 2022
Subjects: subject: Personality, Social and Criminal Psychology
subject: 170113 Social and Community Psychology
subject: FOS: Psychology
subject: 170106 Health, Clinical and Counselling Psychology

description: The severity of COVID-19 has been proven to be substantially disastrous not just towards the economy but also on the welfare of people. Despite having vaccines to counteract and protect people from complications and death, people are still doubtful and hesitant towards vaccines. The objective of this study is to determine, specifically for the Philippine setting, the factors that influence vaccine hesitancy according to the systematic review and meta-analysis of Nindrea et al. (2021). The study was conducted via an online platform that consisted of a seven (7) survey questionnaire that measures thirteen (13) factors that affect vaccine behavioral response. There were a total of 986 respondents from Cebu island who participated in the survey. Data were analyzed using stepwise backward regression to identify the factors fit for the study’s data. Results revealed that trust in the healthcare system, knowledge about vaccines, perceived risk and benefit, being a senior high school graduate and post-college graduate influenced vaccine hesitancy. The results of this study have major implications for a better understanding of vaccine hesitancy and enhancements on strategies that affect acceptance of vaccines.
A non-perturbative study of matter field propagators in Euclidean Yang-Mills theory in linear covariant, Curci-Ferrari and maximal Abelian gauges
Creators: name: Capri, M. A. L.
name: Fiorentini, D.
name: Pereira, A. D.
name: Sorella, S. P.
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In this work, we study the propagators of matter fields within the framework of the Refined Gribov-Zwanziger theory, which takes into account the effects of the Gribov copies in the gauge-fixing quantization procedure of Yang-Mills theory. In full analogy with the pure gluon sector of the Refined Gribov-Zwanziger action, a non-local long-range term in the inverse of the Faddeev-Popov operator is added in the matter sector. Making use of the recent BRST invariant formulation of the Gribov-Zwanziger framework achieved in [Capri et al 2016], the propagators of scalar and quark fields in the adjoint and fundamental representations of the gauge group are worked out explicitly in the linear covariant, Curci-Ferrari and maximal Abelian gauges. Whenever lattice data are available, our results exhibit good qualitative agreement.
description: 27 pages, no figures; V2, minor modifications, to appear in EPJC
Riemannian Invariants that Characterize Rotational Symmetries of the Standard Sphere
Creators: name: Aino, Masayuki
Publisher: name: arXiv
Year: 2016
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 53C21, 53C25

description: Inspired by the Lichnerowicz-Obata theorem for the first eigenvalue of the Laplacian, we define a new family of invariants $\{Ω_k(g)\}$ for closed Riemannian manifolds. The value of $Ω_k(g)$ delicately reflects the spherical part of the manifold. Indeed, $Ω_1(g)$ and $Ω_2(g)$ characterize the standard sphere.
description: 27pages v2: an example added v3: the author's address was changed, the table of contents was changed, some typos were corrected. The final publication is available at Springer via http://dx.doi.org/10.1007/s00229-017-0969-9
1 SSO Form on Letterheadb.pdf
Creators: name: McCluskey, John
name: Uchida, Craig
name: Feys, Yinthe
name: Solomon, Shellie
Publisher: name: figshare
Year: 2023
Subjects: Criminology not elsewhere classified

description: This file repository features a series of codebooks and questionnaires for in-person Environment-based SSO (EBSSO), in-person SSO (IPSSO) of police and Video-based SSO of police (VBSSO). Each Named file is briefly described:
 1 SSO Form on Letterheadb.pdf: This features 15 items that Justice and Security Strategies researchers used to collect data regarding physical disorder during EBSSO observation periods.
 2 SSO Social Indicators This form features 6 items capturing social order and disorder indicators for EBSSO observation periods.
 Dai_37455-0006-Questionnaire-Multi.pdf This is a codebook that accompanies Dr. Dai's VBSSO project archived with the ICPSR in the United States.
 LAPD_Full SSO Instrument_Qualtrics.pdf This file is a capture of the qualtrics instrument deployed by the LAPD-PJ researchers for IPSSO study of the impact of body-worn cameras on police behavior.
 Feys_BOSSD_Codebook.pdf This codebook captures the field instructions and coding for the BOSS-D IPSSO project.
 Doing the Rides_Training_Slides.pdf This is a short slide deck used to prepare observers for the fieldwork, raising common issues, establishing patterns of communication with team leaders, and as a lecture set, would cover do's and don't of behaviors and activities for the LAPD-PJ IPSSO team.
Non-Intrusive Energy Disaggregation Using Non-negative Matrix Factorization with Sum-to-k Constraint
Creators: name: Rahimpour, Alireza
name: Qi, Hairong
name: Fugate, David
name: Kuruganti, Teja
Publisher: name: arXiv
Year: 2017
Subjects: subject: Computational Engineering, Finance, and Science (cs.CE)
subject: FOS: Computer and information sciences

description: Energy disaggregation or Non-Intrusive Load Monitoring (NILM) addresses the issue of extracting device-level energy consumption information by monitoring the aggregated signal at one single measurement point without installing meters on each individual device. Energy disaggregation can be formulated as a source separation problem where the aggregated signal is expressed as linear combination of basis vectors in a matrix factorization framework. In this paper, an approach based on Sum-to-k constrained Non-negative Matrix Factorization (S2K-NMF) is proposed. By imposing the sum-to-k constraint and the non-negative constraint, S2K-NMF is able to effectively extract perceptually meaningful sources from complex mixtures. The strength of the proposed algorithm is demonstrated through two sets of experiments: Energy disaggregation in a residential smart home, and HVAC components energy monitoring in an industrial building testbed maintained at the Oak Ridge National Laboratory (ORNL). Extensive experimental results demonstrate the superior performance of S2K-NMF as compared to state-of-the-art decomposition-based disaggregation algorithms. The source code and our collected data (HVORUT) for studying NILM for HVAC units can be found at https://bitbucket.org/aicip/nonintrusive-load-monitoring.
description: New likes added to previous version. This article has been published in IEEE Transactions on Power Systems-2017
Classical and quantum filaments in the ground state of trapped dipolar Bose gases
Creators: name: Cinti, Fabio
name: Boninsegni, Massimo
Publisher: name: arXiv
Year: 2017
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We study by quantum Monte Carlo simulations the ground state of a harmonically confined dipolar Bose gas with aligned dipole moments, and with the inclusion of a repulsive two-body potential of varying range. Two different limits can be clearly identified, namely a classical one in which the attractive part of the dipolar interaction dominates and the system forms an ordered array of parallel filaments, and a quantum-mechanical one, wherein filaments are destabilized by zero-point motion, and eventually the ground state becomes a uniform cloud. The physical character of the system smoothly evolves from classical to quantum mechanical as the range of the repulsive two-body potential increases. An intermediate regime is observed, in which ordered filaments are still present, albeit forming different structures from the ones predicted classically; quantum-mechanical exchanges of indistinguishable particles across different filaments allow phase coherence to be established, underlying a global superfluid response.
description: Replaced with published version
Experimentally feasible protocol for semiquantum key distribution
Creators: name: Boyer, Michel
name: Katz, Matty
name: Liss, Rotem
name: Mor, Tal
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantum Physics (quant-ph)
subject: Cryptography and Security (cs.CR)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Quantum key distribution (QKD) protocols make it possible for two quantum parties to generate a secret shared key. Semiquantum key distribution (SQKD) protocols, such as "QKD with classical Bob" and "QKD with classical Alice" (that have both been proven robust), achieve this goal even if one of the parties is classical. However, existing SQKD protocols are not experimentally feasible with current technology. Here we suggest a new protocol, "Classical Alice with a controllable mirror", that can be experimentally implemented with current technology (using 4-level systems instead of qubits), and we prove it to be robust.
description: 6 pages
Spontaneous symmetry breaking in a quadratically-driven nonlinear photonic lattice
Creators: name: Savona, Vincenzo
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We investigate the occurrence of a phase transition, characterized by the spontaneous breaking of a discrete symmetry, in a driven-dissipative Bose-Hubbard lattice in presence of two-photon coherent driving. The driving term does not lift the original $U(1)$ symmetry completely and a discrete $\mathbb{Z}_2$ symmetry is left. When driving the bottom of the Bose-Hubbard band, a mean-field analysis of the steady state reveals a second-order transition from a symmetric phase to a quasi-coherent state with a finite expectation value of the Bose field. For larger driving frequency, the phase diagram shows a third region, where both phases are stable and the transition becomes of first order.
description: 7 pages, 3 figures, version accepted for publication
An All-Pair Quantum SVM Approach for Big Data Multiclass Classification
Creators: name: Bishwas, Arit Kumar
name: Mani, Ashish
name: Palade, Vasile
Publisher: name: arXiv
Year: 2017
Subjects: subject: Machine Learning (cs.LG)
subject: Quantum Physics (quant-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: In this paper, we have discussed a quantum approach for the all-pair multiclass classification problem. We have shown that the multiclass support vector machine for big data classification with a quantum all-pair approach can be implemented in logarithm runtime complexity on a quantum computer. In an all-pair approach, there is one binary classification problem for each pair of classes, and so there are k (k-1)/2 classifiers for a k-class problem. As compared to the classical multiclass support vector machine that can be implemented with polynomial run time complexity, our approach exhibits exponential speed up in the quantum version. The quantum all-pair algorithm can be used with other classification algorithms, and a speed up gain can be achieved as compared to their classical counterparts.
MPEC 2023-P67 : DAILY ORBIT UPDATE (2023 August 13)
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2023
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Camera-trap images segmentation using multi-layer robust principal component analysis
Creators: name: Giraldo-Zuluaga, Jhony-Heriberto
name: Gomez, Alexander
name: Salazar, Augusto
name: Diaz-Pulido, Angélica
Publisher: name: arXiv
Year: 2017
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: The segmentation of animals from camera-trap images is a difficult task. To illustrate, there are various challenges due to environmental conditions and hardware limitation in these images. We proposed a multi-layer robust principal component analysis (multi-layer RPCA) approach for background subtraction. Our method computes sparse and low-rank images from a weighted sum of descriptors, using color and texture features as case of study for camera-trap images segmentation. The segmentation algorithm is composed of histogram equalization or Gaussian filtering as pre-processing, and morphological filters with active contour as post-processing. The parameters of our multi-layer RPCA were optimized with an exhaustive search. The database consists of camera-trap images from the Colombian forest taken by the Instituto de Investigación de Recursos Biológicos Alexander von Humboldt. We analyzed the performance of our method in inherent and therefore challenging situations of camera-trap images. Furthermore, we compared our method with some state-of-the-art algorithms of background subtraction, where our multi-layer RPCA outperformed these other methods. Our multi-layer RPCA reached 76.17 and 69.97% of average fine-grained F-measure for color and infrared sequences, respectively. To our best knowledge, this paper is the first work proposing multi-layer RPCA and using it for camera-trap images segmentation.
description: This is a pre-print of an article published in The Visual Computer. The final authenticated version is available online at: https://doi.org/10.1007/s00371-017-1463-9
On-Chart Success Dynamics of Popular Songs
Creators: name: Shin, Seungkyu
name: Park, Juyong
Publisher: name: arXiv
Year: 2017
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Social and Information Networks (cs.SI)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: In the modern era where highly-commodified cultural products compete heavily for mass consumption, finding the principles behind the complex process of how successful, "hit" products emerge remains a vital scientific goal that requires an interdisciplinary approach. Here we present a framework for tracing the cycle of prosperity-and-decline of a product to find insights into influential and potent factors that determine its success. As a rapid, high-throughput indicator of the preference of the public, popularity charts have emerged as a useful information source for finding the market performance patterns of products over time, which we call the on-chart life trajectories that show how the products enter the chart, fare inside it, and eventually exit from it. We propose quantitative parameters to characterise a life trajectory, and analyse a large-scale data set of nearly $7\,000$ songs from Gaon Chart, a major weekly Korean Pop (K-Pop) chart that cover a span of six years. We find that a significant role is played by non-musical extrinsic factors such as the established fan base of the artist and the might of production companies in the on-chart success of songs, strongly indicative of the commodified nature of modern cultural products. We also review a possible mathematical model of this phenomenon, and discuss several nontrivial yet intriguing trajectories that we call the "Late Bloomers" and the "Re-entrants" that appears to be strongly driven by serendipitous exposure on mass media and the changes of seasons.
description: 12 pages, 9 figures
New Physics in $b \rightarrow s μ^+ μ^-$: Distinguishing Models through CP-Violating Effects
Creators: name: Alok, Ashutosh Kumar
name: Bhattacharya, Bhubanjyoti
name: Kumar, Dinesh
name: Kumar, Jacky
name: London, David
name: Sankar, S. Uma
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: At present, there are several measurements of $B$ decays that exhibit discrepancies with the predictions of the SM, and suggest the presence of new physics (NP) in $b \to s μ^+ μ^-$ transitions. Many NP models have been proposed as explanations. These involve the tree-level exchange of a leptoquark (LQ) or a flavor-changing $Z'$ boson. In this paper we examine whether it is possible to distinguish the various models via CP-violating effects in $B \to K^{(*)} μ^+ μ^-$. Using fits to the data, we find the following results. Of all possible LQ models, only three can explain the data, and these are all equivalent as far as $b \to s μ^+ μ^-$ processes are concerned. In this single LQ model, the weak phase of the coupling can be large, leading to some sizeable CP asymmetries in $B \to K^{(*)} μ^+ μ^-$. There is a spectrum of $Z'$ models; the key parameter is $g_L^{μμ}$, which describes the strength of the $Z'$ coupling to $μ^+μ^-$. If $g_L^{μμ}$ is small (large), the constraints from $B^0_s$-${\bar B}^0_s$ mixing are stringent (weak), leading to a small (large) value of the NP weak phase, and corresponding small (large) CP asymmetries. We therefore find that the measurement of CP-violating asymmetries in $B \to K^{(*)} μ^+ μ^-$ can indeed distinguish among NP $b \to s μ^+ μ^-$ models
description: 23 pages, 3 figures; references updated; published in Physical Review D
Two new families of two-weight codes
Creators: name: Shi, Minjia
name: Guan, Yue
name: Sole, Patrick
Publisher: name: arXiv
Year: 2016
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences
subject: 94B25

description: We construct two new infinite families of trace codes of dimension $2m$, over the ring $\mathbb{F}_p+u\mathbb{F}_p,$ when $p$ is an odd prime. They have the algebraic structure of abelian codes. Their Lee weight distribution is computed by using Gauss sums. By Gray mapping, we obtain two infinite families of linear $p$-ary codes of respective lengths $(p^m-1)^2$ and $2(p^m-1)^2.$ When $m$ is singly-even, the first family gives five-weight codes. When $m$ is odd, and $p\equiv 3 \pmod{4},$ the first family yields $p$-ary two-weight codes, which are shown to be optimal by application of the Griesmer bound. The second family consists of two-weight codes that are shown to be optimal, by the Griesmer bound, whenever $p=3$ and $m \ge 3,$ or $p\ge 5$ and $m\ge 4.$ Applications to secret sharing schemes are given.
description: 7 pages
Gap dependent mass of photon in photonic topological insulator
Creators: name: Vieira, Marcelo
name: Sergeenkov, Sergei
name: Furtado, Claudio
Publisher: name: arXiv
Year: 2017
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: By using an analogy with axionic like systems, we study light propagation in periodic photonic topological insulator (PTI). The main result of this paper is an explicit expression for the PTI band structure. More specifically, it was found that for nonzero values of the topological phase difference $γ=θ_2-θ_1$ a finite gap $δ\proptoγ^2$ opens in the spectrum which is equivalent to appearance of nonzero effective photon mass $m^{*}(δ)\propto \frac{\sqrtδ}{δ+2}$.
description: 8 pages, 5 figures, revised version accepted in PRA
Search for low mass vector resonances decaying to quark-antiquark pairs in proton-proton collisions at sqrt(s) = 13 TeV
Creators: name: CMS Collaboration
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: A search is reported for a narrow vector resonance decaying to quark-antiquark pairs in proton-proton collisions at sqrt(s) = 13 TeV, collected with the CMS detector at the LHC. The data sample corresponds to an integrated luminosity of 2.7 inverse femtobarns. The vector resonance is produced at large transverse momenta, with its decay products merged into a single jet. The resulting signature is a peak over background in the distribution of the invariant mass of the jet. The results are interpreted in the framework of a leptophobic vector resonance and no evidence is found for such particles in the mass range of 100-300 GeV. Upper limits at 95% confidence level on the production cross section are presented in a region of mass-coupling phase space previously unexplored at the LHC. The region below 140 GeV has not been explored by any previous experiments.
description: Replaced with the published version. Added the journal reference and DOI. All the figures and tables can be found at http://cms-results.web.cern.ch/cms-results/public-results/publications/EXO-16-030
Disorder-free spin glass transitions and jamming in exactly solvable mean-field models
Creators: name: Yoshino, Hajime
Publisher: name: arXiv
Year: 2017
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: We construct and analyze a family of $M$-component vectorial spin systems which exhibit glass transitions and jamming within supercooled paramagnetic states without quenched disorder. Our system is defined on lattices with connectivity $c=αM$ and becomes exactly solvable in the limit of large number of components $M \to \infty$. We consider generic $p$-body interactions between the vectorial Ising/continuous spins with linear/non-linear potentials. The existence of self-generated randomness is demonstrated by showing that the random energy model is recovered from a $M$-component ferromagnetic $p$-spin Ising model in $M \to \infty$ and $p \to \infty$ limit. In our systems the quenched disorder, if present, and the self-generated disorder act additively. Our theory provides a unified mean-field theoretical framework for glass transitions of rotational degree of freedoms such as orientation of molecules in glass forming liquids, color angles in continuous coloring of graphs and vector spins of geometrically frustrated magnets. The rotational glass transitions accompany various types of replica symmetry breaking. In the case of repulsive hardcore interactions in the spin space, continuous the criticality of the jamming or SAT/UNSTAT transition becomes the same as that of hardspheres.
description: 85 pages (9 figures) Revised and extended version submitted to SciPost Physics. (Analysis on anisotropic particles included in v2 will be presented in a separate publication.)
Generation of rogue waves in gyrotrons operating in the regime of developed turbulence
Creators: name: Ginzburg, N. S.
name: Rozental, R. M.
name: Sergeev, A. S.
name: Fedotov, A. E.
name: Zotova, I. V.
name: Tarakanov, V. P.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: Within the framework of the average approach and direct 3D PIC (particle-in-cell) simulations we demonstrate that the gyrotrons operating in the regime of developed turbulence can sporadically emit "giant" spikes with intensities a factor of 100-150 greater than the average radiation power and a factor of 6-9 exceeding the power of the driving electron beams. Together with the statistical features such as a long-tail probability distribution, this allows the interpretation of generated spikes as microwave rogue waves. The mechanism of spikes formation is related to the simultaneous cyclotron interaction of a gyrating electron beam with forward and backward waves near the waveguide cutoff frequency as well as with the longitudinal deceleration of electrons.
Complex symplectic structures and the $\partial \bar{\partial}$-lemma
Creators: name: Cattaneo, Andrea
name: Tomassini, Adriano
Publisher: name: arXiv
Year: 2016
Subjects: subject: Differential Geometry (math.DG)
subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 53C15, 53C56, 32C35

description: In this paper we study complex symplectic manifolds, i.e., compact complex manifolds $X$ which admit a holomorphic $(2, 0)$-form $σ$ which is $d$-closed and non-degenerate, and in particular the Beauville-Bogomolov-Fujiki quadric $Q_σ$ associated to them. We will show that if X satisfies the $\partial \bar{\partial}$-lemma, then $Q_σ$ is smooth if and only if $h^{2,0}(X) = 1$ and is irreducible if and only if $h^{1,1}(X) > 0$.
description: 12 pages
Anomalous Transport and Generalized Axial Charge
Creators: name: Kirilin, Vladimir P.
name: Sadofyev, Andrey V.
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: In this paper we continue studying the modification of the axial charge in chiral media by macroscopic helicities. Recently it was shown that magnetic reconnections result in a persistent current of zero mode along flux tubes. Here we argue that in general a change in the helical part of the generalized axial charge results in the same phenomenon. Thus one may say that there is a novel realization of chiral effects requiring no initial chiral asymmetry. The transfer of flow helicity to zero modes is analyzed in a toy model based on a vortex reconnection in a chiral superfluid. Then, we discuss the balance between the two competing processes effect of reconnections and the chiral instability on the example of magnetic helicity. We argue that in the general case there is a possibility for the distribution of the axial charge between the magnetic and fermionic forms at the end of the instability.
description: 19 pages, version accepted in PRD