cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Cyclic mutually unbiased bases, Fibonacci polynomials and Wiedemann's conjecture
Creators: name: Seyfarth, Ulrich
name: Ranade, Kedar S.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We relate the construction of a complete set of cyclic mutually unbiased bases, i. e., mutually unbiased bases generated by a single unitary operator, in power-of-two dimensions to the problem of finding a symmetric matrix over F_2 with an irreducible characteristic polynomial that has a given Fibonacci index. For dimensions of the form 2^(2^k) we present a solution that shows an analogy to an open conjecture of Wiedemann in finite field theory. Finally, we discuss the equivalence of mutually unbiased bases.
description: 11 pages, added chapter on equivalence
How CIties Can Use Autonomous Vehicles to Increase Transit Ridership and Reduce Household Vehicle Ownership
Creators: name: Grush, Bern
name: Niles, John
name: Grush, Bern
name: Niles, John
Publisher: name: Unknown
Year: 2016
Subjects: Public Economics

description: Presented at the 51st CTRF (57th TRF) Joint Conference, May 1-4, 2016, Toronto, Ontario
Demazure crystals, Kirillov-Reshetikhin crystals, and the energy function
Creators: name: Schilling, Anne
name: Tingley, Peter
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Algebra (math.QA)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics

description: It has previously been shown that, at least for non-exceptional Kac-Moody Lie algebras, there is a close connection between Demazure crystals and tensor products of Kirillov-Reshetikhin crystals. In particular, certain Demazure crystals are isomorphic as classical crystals to tensor products of Kirillov-Reshetikhin crystals via a canonically chosen isomorphism. Here we show that this isomorphism intertwines the natural affine grading on Demazure crystals with a combinatorially defined energy function. As a consequence, we obtain a formula of the Demazure character in terms of the energy function, which has applications to Macdonald polynomials and q-deformed Whittaker functions.
description: 35 pages. v2: minor revisions, including several new examples and references
Linearized f(R) Gravity: Gravitational Radiation & Solar System Tests
Creators: name: Berry, Christopher P. L.
name: Gair, Jonathan R.
Publisher: name: arXiv
Year: 2011
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We investigate the linearized form of metric f(R)-gravity, assuming that f(R) is analytic about R = 0 so it may be expanded as f(R) = R + a_2 R^2/2 + ... . Gravitational radiation is modified, admitting an extra mode of oscillation, that of the Ricci scalar. We derive an effective energy-momentum tensor for the radiation. We also present weak-field metrics for simple sources. These are distinct from the equivalent Kerr (or Schwarzschild) forms. We apply the metrics to tests that could constrain f(R). We show that light deflection experiments cannot distinguish f(R)-gravity from general relativity as both have an effective post-Newtonian parameter γ= 1. We find that planetary precession rates are enhanced relative to general relativity; from the orbit of Mercury we derive the bound |a_2| < 1.2 \times 10^18 m^2. Gravitational wave astronomy may be more useful: considering the phase of a gravitational waveform we estimate deviations from general relativity could be measurable for an extreme-mass-ratio inspiral about a 10^6 M_sol black hole if |a_2| > 10^17 m^2, assuming that the weak-field metric of the black hole coincides with that of a point mass. However Eot-Wash experiments provide the strictest bound |a_2| < 2 \times 10^-9 m^2. Although the astronomical bounds are weaker, they are still of interest in the case that the effective form of f(R) is modified in different regions, perhaps through the chameleon mechanism. Assuming the laboratory bound is universal, we conclude that the propagating Ricci scalar mode cannot be excited by astrophysical sources.
description: 19 pages, 1 figure; typos in Sec. VIII. A. corrected
Induced Rotation in 3D Simulations of Core Collapse Supernovae: Implications for Pulsar Spins
Creators: name: Rantsiou, E.
name: Burrows, A.
name: Nordhaus, J.
name: Almgren, A.
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: It has been suggested that the observed rotation periods of radio pulsars might be induced by a non-axisymmetric spiral-mode instability in the turbulent region behind the stalled supernova bounce shock, even if the progenitor core was not initially rotating. In this paper, using the three-dimensional AMR code CASTRO with a realistic progenitor and equation of state and a simple neutrino heating and cooling scheme, we present a numerical study of the evolution in 3D of the rotational profile of a supernova core from collapse, through bounce and shock stagnation, to delayed explosion. By the end of our simulation ($\sim$420 ms after core bounce), we do not witness significant spin up of the proto-neutron star core left behind. However, we do see the development before explosion of strong differential rotation in the turbulent gain region between the core and stalled shock. Shells in this region acquire high spin rates that reach $\sim$$150\,$ Hz, but this region contains too little mass and angular momentum to translate, even if left behind, into rapid rotation for the full neutron star. We find also that much of the induced angular momentum is likely to be ejected in the explosion, and moreover that even if the optimal amount of induced angular momentum is retained in the core, the resulting spin period is likely to be quite modest. Nevertheless, induced periods of seconds are possible.
description: Accepted to the Astrophysical Journal
Quantifications and characteristics of dynamic soft tissue artifacts captured by wearable inertial measurement unit sensors
Creators: name: Rong, Shenyi
Publisher: name: University of British Columbia
Year: 2022

description: Inertial measurement units (IMUs) are a prevalent component in wearable sensor systems to study motion in unconstrained environments by measuring both linear acceleration and angular velocity at a point of interest on the human body. However, wearable sensors are often worn on soft tissue that is excited during impulsive impacts, producing dynamic soft tissue artifact measurement errors. This thesis quantifies the error caused by dynamic soft tissue artifacts to IMU sensors with different sensor mass and placement when mild impulsive impacts are delivered to the lower extremity using empirical signal analysis and model-based predictions. Data were collected from three IMU sensors attached at the anterior and posterior center of the dominant shank, and at the back of the ankle of 10 participants (5 females, 5 males). We varied the mass of the two shank IMUs from 5 grams to 37 grams in 8-gram increments. Impacts were generated by dropping the shank freely onto a foam pad placed on a force plate from a height of 21.6 cm. Ground truth vertical linear acceleration measurements from the ankle IMU were first cross-validated against the force plate. We then determined both posterior and anterior IMUs overestimated the ground truth peak vertical linear acceleration measurement by 117.9% and 55.1%, respectively. The posterior IMU had greater overestimations, suggesting more severe dynamic soft tissue artifacts, while errors generally decreased with increasing mass, suggesting a mitigating effect from adding sensor mass. We next assessed post-impact oscillations, which we determined lasted 0.32±0.07 seconds with a frequency of 9.79±2.68 Hz on the posterior and 0.15±0.05 seconds with a frequency of 18.33±12.24 Hz on the anterior. As sensor weight increased, the oscillation duration increased linearly while the frequency decreased for both anterior and posterior IMUs. This suggests that increasing sensor mass amplifies post-impact dynamic soft tissue artifact errors. These results and dependencies were confirmed by modeling dynamic soft tissue artifacts as double spring mass damper systems. In conclusion, the dynamic soft tissue artifacts directly relate to the accuracy of kinematic measurement in IMU sensors with a dependence on sensor mass and placement.
OCHA and Leibniz Pairs, towards a Koszul duality
Creators: name: Livernet, Muriel
name: Hoefel, Eduardo
Publisher: name: arXiv
Year: 2011
Subjects: subject: Rings and Algebras (math.RA)
subject: Algebraic Topology (math.AT)
subject: Quantum Algebra (math.QA)
subject: FOS: Mathematics
subject: 18G55, 18D50

description: In this paper we study the homology of 2 versions of the swiss-cheese operad. We prove that the zeroth homology of these two versions are Koszul operads and relate this to strong homotopy Lebiniz pairs and OCHA, defined by Kajiura and Stasheff.
description: 33 pages, 3 figures, published in LMP under the title: "Open-Closed Homotopy Algebras and Strong Homotopy Leibniz Pairs Through Koszul Operad Theory"
Spatial Graphs with Local Knots
Creators: name: Flapan, Erica
name: Mellor, Blake
name: Naimi, Ramin
Publisher: name: arXiv
Year: 2010
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 57M25, 57M15, 05C10

description: It is shown that for any locally knotted edge of a 3-connected graph in $S^3$, there is a ball that contains all of the local knots of that edge and is unique up to an isotopy setwise fixing the graph. This result is applied to the study of topological symmetry groups of graphs embedded in $S^3$.
description: 20 pages, 3 figures; in v. 2 the proof of Theorem 1 has been clarified, and other minor revisions have been made
Dethinning Extensive Air Shower Simulations
Creators: name: Stokes, B. T.
name: Cady, R.
name: Ivanov, D.
name: Matthews, J. N.
name: Thomson, G. B.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We describe a method for restoring information lost during statistical thinning in extensive air shower simulations. By converting weighted particles from thinned simulations to swarms of particles with similar characteristics, we obtain a result that is essentially identical to the thinned shower, and which is very similar to non-thinned simulations of showers. We call this method dethinning. Using non-thinned showers on a large scale is impossible because of unrealistic CPU time requirements, but with thinned showers that have been dethinned, it is possible to carry out large-scale simulation studies of the detector response for ultra-high energy cosmic ray surface arrays. The dethinning method is described in detail and comparisons are presented with parent thinned showers and with non-thinned showers.
Euclidean wormholes with Phantom field and Phantom field accompanied by perfect fluid
Creators: name: Darabi, F.
Publisher: name: arXiv
Year: 2010
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We study the classical Euclidean wormhole solutions for the gravitational systems with minimally coupled pure Phantom field and minimally coupled Phantom field accompanied by perfect fluid. It is shown that such solutions do exist and then the general forms of the Phantom field potential are obtained for which there are classical Euclidean wormhole solutions.
description: 15 pages, major revision with perfect fluid
Kondo Resonance of a Microwave Photon
Creators: name: Hur, Karyn Le
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: High Energy Physics - Theory (hep-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We emulate renormalization group models, such as the Spin-Boson Hamiltonian or the anisotropic Kondo model, from a quantum optics perspective by considering a superconducting device. The infra-red confinement involves photon excitations of two tunable transmission lines entangled to an artificial spin-1/2 particle or double-island charge qubit. Focusing on the propagation of microwave light, in the underdamped regime of the Spin-Boson model, we identify a many-body resonance where a photon is absorbed at the renormalized qubit frequency and reemitted forward in an elastic manner. We also show that asymptotic freedom of microwave light is reached by increasing the input signal amplitude at low temperatures which allows the disappearance of the transmission peak.
description: Final Version: Main text and Supplementary Material
Relaxation time for the temperature in a dilute binary mixture from classical kinetic theory
Creators: name: Moratto, Valdemar
name: Garcia-Colin, L. S.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The system of our interest is a dilute binary mixture, in which we consider that the species have different temperatures as an initial condition. To study their time evolution, we use the full version of the Boltzmann equation, under the hypothesis of partial local equilibrium for both species. Neither a diffusion force nor mass diffusion appears in the system. We also estimate the time in which the temperatures of the components reach the full local equilibrium. In solving the Boltzmann equation, we imposed no assumptions on the collision term. We work out its solution by using the well known Chapman-Enskog method to first order in the gradients. The time in which the temperatures relax is obtained following Landau's original idea. The result is that the relaxation time for the temperatures is much smaller than the characteristic hydrodynamical times but greater than a collisional time. The main conclusion is that there is no need to study binary mixtures with different temperatures when hydrodynamical properties are sought.
The Myth of the Powerful Consumer: Deconstructing the Collective Belief
Creators: name: Gabriel, Michelle Blair
Publisher: name: Zenodo
Year: 2019
Subjects: consumers
fashion
clothing
power
consumption
capitalism
Foucault

description: A thesis written in partial fulfillment of the requirements of the Master of Science in International Fashion Marketing from Glasgow Caledonian New York College in New York, New York, USA.
Understanding the Differences in Lane Change Maneuvers of Cars and Heavy Vehicles on Freeways
Creators: name: Durrani, Umair
name: Lee, Chris
name: Zhao, Peibo
name: Durrani, Umair
name: Lee, Chris
name: Zhao, Peibo
Publisher: name: Unknown
Year: 2016
Subjects: Public Economics

description: Presented at the 51st CTRF (57th TRF) Joint Conference, May 1-4, 2016, Toronto, Ontario
Visualization of phase-coherent electron interference in a ballistic graphene Josephson junction
Creators: name: Allen, M. T.
name: Shtanko, O.
name: Fulga, I. C.
name: Wang, J. I. -J.
name: Nurgaliev, D.
name: Watanabe, K.
name: Taniguchi, T.
name: Akhmerov, A. R.
name: Jarillo-Herrero, P.
name: Levitov, L. S.
name: Yacoby, A.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Interference of standing waves in electromagnetic resonators forms the basis of many technologies, from telecommunications and spectroscopy to detection of gravitational waves. However, unlike the confinement of light waves in vacuum, the interference of electronic waves in solids is complicated by boundary properties of the crystal, notably leading to electron guiding by atomic-scale potentials at the edges. Understanding the microscopic role of boundaries on coherent wave interference is an unresolved question due to the challenge of detecting charge flow with submicron resolution. Here we employ Fraunhofer interferometry to achieve real-space imaging of cavity modes in a graphene Fabry-Perot resonator, embedded between two superconductors to form a Josephson junction. By directly visualizing current flow using Fourier methods, our measurements reveal surprising redistribution of current on and off resonance. These findings provide direct evidence of separate interference conditions for edge and bulk currents and reveal the ballistic nature of guided edge states. Beyond equilibrium, our measurements show strong modulation of the multiple Andreev reflection amplitude on an off resonance, a direct measure of the gate-tunable change of cavity transparency. These results demonstrate that, contrary to the common belief, electron interactions with realistic disordered edges facilitate electron wave interference and ballistic transport.
description: Includes Supplementary Information
Hot Electrons Regain Coherence in Semiconducting Nanowires
Creators: name: Reiner, Jonathan
name: Nayak, Abhay Kumar
name: Avraham, Nurit
name: Norris, Andrew
name: Yan, Binghai
name: Fulga, Ion Cosma
name: Kang, Jung-Hyun
name: Karzig, Torsten
name: Shtrikman, Hadas
name: Beidenkopf, Haim
Publisher: name: arXiv
Year: 2017
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The higher the energy of a particle is above equilibrium the faster it relaxes due to the growing phase-space of available electronic states it can interact with. In the relaxation process phase coherence is lost, thus limiting high energy quantum control and manipulation. In one-dimensional systems high relaxation rates are expected to destabilize electronic quasiparticles. We show here that the decoherence induced by relaxation of hot electrons in one-dimensional semiconducting nanowires evolves non-monotonically with energy such that above a certain threshold hot-electrons regain stability with increasing energy. We directly observe this phenomenon by visualizing for the first time the interference patterns of the quasi-one-dimensional electrons using scanning tunneling microscopy. We visualize both the phase coherence length of the one-dimensional electrons, as well as their phase coherence time, captured by crystallographic Fabry-Perot resonators. A remarkable agreement with a theoretical model reveals that the non-monotonic behavior is driven by the unique manner in which one dimensional hot-electrons interact with the cold electrons occupying the Fermi-sea. This newly discovered relaxation profile suggests a high-energy regime for operating quantum applications that necessitate extended coherence or long thermalization times, and may stabilize electronic quasiparticles in one dimension.
Asymptotic representations and Drinfeld rational fractions
Creators: name: Hernandez, David
name: Jimbo, Michio
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Algebra (math.QA)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics

description: We introduce and study a category of representations of the Borel algebra, associated with a quantum loop algebra of non-twisted type. We construct fundamental representations for this category as a limit of the Kirillov-Reshetikhin modules over the quantum loop algebra and we establish explicit formulas for their characters. We prove that general simple modules in this category are classified by n-tuples of rational functions in one variable, which are regular and non-zero at the origin but may have a zero or a pole at infinity.
description: 32 pages; accepted for publication in Compositio Mathematica
COMO LA FLOR THAT GREW ON THE BORDERLANDS: IMPACT OF LINGUISTIC TERRORISM ON BILINGUAL LATINA/O/X LANGUAGE EXPERIENCES
Creators: name: Ferreyra Brindis, Jenifer
Publisher: name: Zenodo
Year: 2023
Subjects: Latina/o/x
language
borderlands
linguistic terrorism
Spanish
language anxiety

description: This thesis focuses on the unique experiences of bilingual Spanish-speaking Latina/o/x individuals who have grown up in the U.S. through a critical methodology and testimonio. I look into understanding bilingual Latina/o/x lived experiences surrounding their native Spanish fluency to explore the extents to which Spanish fluency–and subsequent language critiques about their fluency–plays a role in Latina/o/x identity formation and Latina/o/x intragroup relations through the following themes: (1) The kind of Spanish that was useful: functions of language, (2) Como que mi perdí en los dos lados: Effects of language loss stigma, and (3) Barriers and acts of resistance. Findings show that students had dismissed their own experiences of language anxiety due to believing that this was an experience unique to them and have additionally internalized language critiques that have been directed at them. Findings also showed that language plays a prominent role in group membership within Latina/o/x communities, and those communities play a more significant role in language maintenance decisions than previously thought; the participants stated how much they valued how other Latina/o/x perceived them and their language. The testimonios in this thesis give clarity to the lived experiences of bilingual Latina/o/x of varying levels of Spanish proficiency and illustrate the potential to positively impact our communities through the reframing of how we see language maintenance works.
Additional file 1 of Comparative proteomic analysis of seminal plasma exosomes in buffalo with high and low sperm motility
Creators: name: Yu, Kai
name: Xiao, Kai
name: Sun, Qin-qiang
name: Liu, Run-feng
name: Huang, Liang-feng
name: Zhang, Peng-fei
name: Xu, Hui-yan
name: Lu, Yang-qing
name: Fu, Qiang
Publisher: name: figshare
Year: 2023
Subjects: subject: Biophysics
subject: Biochemistry
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Physiology
subject: Immunology
subject: FOS: Clinical medicine
subject: Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Cancer
subject: Inorganic Chemistry
subject: FOS: Chemical sciences

description: Additional file 1: Fig. S1. The full size image of western blots of Alix, TSG101 and CD81 in seminal plasma exosomes (SPEs), large extracellular vesicles (LEVs), and seminal plasma (SP) samples. Fig. S2. Functional classification based on Gene Ontology (GO) annotation of proteome profile in spermatozoa, seminal plasma (SP), and seminal plasma exosomes (SPEs). Fig. S3. Original image of protein-protein interaction (PPI) network of seminal plasma exosomes (SPEs).
Cosmological evolution of a D-brane
Creators: name: Li, Huiquan
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study the cosmological evolution of a single BPS D-brane in the absence of potential, which is in the category of the Chaplygin gas cosmological model. When such a D-brane coupled to gravity moves in the bulk with a non-vanishing velocity, it tends to slow down to zero velocity via mechanisms like gravitational waves leakage to the bulk, losing its kinetic energy to fuel the expansion of the universe on the D-brane. If the initial velocity of the D-brane is high enough, the universe on the D-brane undergoes a dust-like stage at early times and an acceleration stage at late times, as observed in the original Chaplygin gas model. When the D-brane velocity is initially zero, the D-brane will always remain fixed at some position in the bulk, with the brane tension over the Plank mass squared as a cosmological constant. Interestingly, this kind of fixed brane universe can arise as defects from tachyon inflation on a non-BPS D-brane with one dimension higherWe study the cosmological evolution of a single BPS D-brane coupled to gravity in the absence of potential. When such a D-brane moves in the bulk with non-vanishing velocity, it tends to slow down to zero velocity via mechanisms like gravitational wave leakage to the bulk, losing its kinetic energy to fuel the expansion of the universe on the D-brane. If the initial velocity of the D-brane is high enough, the universe on the D-brane undergoes a dust-like stage at early times and an acceleration stage at late times, realising the original Chaplygin gas model. When the D-brane velocity is initially zero, the D-brane will always remain fixed at some position in the bulk, with the brane tension over the Plank mass squared as a cosmological constant. It is further shown that this kind of fixed brane universe can arise as defects from tachyon inflation on a non-BPS D-brane with one dimension higher.
description: 13 pages
On discrete twisted C*-dynamical systems, Hilbert C*-modules and regularity
Creators: name: Bedos, Erik
name: Conti, Roberto
Publisher: name: arXiv
Year: 2011
Subjects: subject: Operator Algebras (math.OA)
subject: Dynamical Systems (math.DS)
subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 22D10, 22D25, 46L55, 43A07, 43A65

description: We first give an overview of the basic theory for discrete unital twisted C*-dynamical systems and their covariant representations on Hilbert C*-modules. After introducing the notion of equivariant representations of such systems and their product with covariant representations, we prove a kind of Fell absorption principle saying that the product of an induced regular equivariant representation with a covariant faithful representation is weakly equivalent to an induced regular covariant representation. This principle is the key to our main result, namely that a certain property, formally weaker than Exel's approximation property, ensures that the system is regular, i.e., the associated full and reduced C*-crossed products are canonically isomorphic.
description: Final version, to appear in Muenster J. Math. A permanence result for the weak approximation property, some corollaries of it and two examples have been added to Section 5. Some side results in Section 4 have been removed and will be included in a subsequent paper. The Introduction has also been partly rewritten
Exploring the Residual Queue Length Equation in the Shock Wave Model
Creators: name: Noaeen, Mohammad
name: Rassafi, Amir Abbas
name: Far, Behrouz Homayoun
name: Noaeen, Mohammad
name: Rassafi, Amir Abbas
name: Far, Behrouz Homayoun
Publisher: name: Unknown
Year: 2016
Subjects: Public Economics

description: Presented at the 51st CTRF (57th TRF) Joint Conference, May 1-4, 2016, Toronto, Ontario
Frequency shift keying in vortex-based spin torque oscillators
Creators: name: Manfrini, M.
name: Devolder, T.
name: Kim, Joo-Von
name: Crozat, P.
name: Chappert, C.
name: Van Roy, W.
name: Lagae, L.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Vortex-based spin-torque oscillators can be made from extended spin valves connected to an electrical nanocontact. We study the implementation of frequency shift keying modulation in these oscillators. Upon a square modulation of the current in the 10 MHz range, the vortex frequency follows the current command, with easy identification of the two swapping frequencies in the spectral measurements. The frequency distribution of the output power can be accounted for by convolution transformations of the dc current vortex waveform, and the current modulation. Modeling indicates that the frequency transitions are phase coherent and last less than 25 ns. Complementing the multi-octave tunability and first-class agility, the capability of frequency shift keying modulation is an additional milestone for the implementation of vortex-based oscillators in RF circuit.
description: 6 pages, 5 figures
The 'Big Lift' Project of Macdonald Bridge Re-Decking, Halifax, Canada: A Dynamic Traffic Assignment Model
Creators: name: Alam, Md Jahedul
name: Habib, Muhammad Ahsanul
name: Alam, Md Jahedul
name: Habib, Muhammad Ahsanul
Publisher: name: Unknown
Year: 2016
Subjects: Public Economics

description: Presented at the 51st CTRF (57th TRF) Joint Conference, May 1-4, 2016, Toronto, Ontario
Lieb-Schultz-Mattis theorems for symmetry protected topological phases
Creators: name: Lu, Yuan-Ming
Publisher: name: arXiv
Year: 2017
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The Lieb-Schultz-Mattis (LSM) theorem and its descendants represent a class of powerful no-go theorems that rule out any short-range-entangled (SRE) symmetric ground state irrespective of the specific Hamiltonian, based only on certain microscopic inputs such as symmetries and particle filling numbers. In this work, we introduce and prove a new class of LSM-type theorems, where any symmetry-allowed SRE ground state must be a symmetry-protected topological (SPT) phase with robust gapless edge states. The key ingredient is to replace the lattice translation symmetry in usual LSM theorems by magnetic translation symmetry. These theorems provide new insights into numerical models and experimental realizations of SPT phases in interacting bosons and fermions.
description: 7+8 pages, 2 figures, 2 tables
Slow diffusion by Markov random flights
Creators: name: Kolesnik, Alexander D.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60K35, 60K99, 60J60, 60J65, 82C41, 82C70

description: We present a conception of the slow diffusion processes in the Euclidean spaces $\Bbb R^m, \; m\ge 1$, based on the theory of random flights with small constant speed that are driven by a homogeneous Poisson process of small rate. The slow diffusion conditions that, on long time intervals, lead to the stationary distributions, are given. The stationary distributions of slow diffusion processes in some Euclidean spaces of low dimensions, are presented.
description: 16 pages, 5 figures
Exponential Renormalization II: Bogoliubov's R-operation and momentum subtraction schemes
Creators: name: Ebrahimi-Fard, Kurusch
name: Patras, Frederic
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Rings and Algebras (math.RA)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: This article aims at advancing the recently introduced exponential method for renormalisation in perturbative quantum field theory. It is shown that this new procedure provides a meaningful recursive scheme in the context of the algebraic and group theoretical approach to renormalisation. In particular, we describe in detail a Hopf algebraic formulation of Bogoliubov's classical R-operation and counterterm recursion in the context of momentum subtraction schemes. This approach allows us to propose an algebraic classification of different subtraction schemes. Our results shed light on the peculiar algebraic role played by the degrees of Taylor jet expansions, especially the notion of minimal subtraction and oversubtractions.
description: revised version
GENDER DIFFERENCES IN ACADEMIC PERSISTENCE: THE ROLE OF INTERNALIZED INFERIOR MINORITY MYTH FOR SOUTHEAST ASIAN AMERICAN FIRST-GENERATION COLLEGE STUDENTS
Creators: name: Chang, Richard
Publisher: name: Zenodo
Year: 2023
Subjects: Southeast Asian American
internalized racism
inferior minority myth
academic persistence
gender

description: Today, over 2.5 million Southeast Asian Americans (SEAA; Viet, Khmer, Lao, Hmong) live in the United States, and a substantial proportion is academically falling behind compared to their peers. Moreover, there are gender differences in SEAA’s academic achievement, which could be explained by internalized racism, such as the internalization of the inferior minority myth. The inferior minority myth portrays SEAAs as academically inferior, lazy, and delinquent. The current study tested hypotheses related to gender differences in internalizing the inferior minority myth and academic persistence among SEAA college students. The study found no gender differences in persistence or internalization of the inferior minority myth, but internalization of the stereotype was negatively correlated with persistence. In summary, for SEAA college students—regardless of gender—internalization of the inferior minority myth is linked to lower academic persistence. Future research and implications are further discussed in the study.
Detecting missing flow separation and predicting error in drag using supervised machine learning
Creators: name: Kamalhedayat, Amirpasha
Publisher: name: University of British Columbia
Year: 2022

description: Accuracy of flow simulations is a major concern in Computational Fluid Dynamics (CFD) applications. A possible outcome of inaccuracy in CFD results is missing a major feature in the flow field. Many methods have been proposed to reduce numerical errors and increase overall accuracy, but these are not always efficient or even feasible. In this study, a purely data-driven approach is proposed to assess flow simulations both in a qualitative and a quantitative manner. In this regard, Principal Component Analysis (PCA) has been performed on compressible flow simulations around an airfoil to map the high-dimensional CFD data to a lower-dimensional PCA subspace. A machine learning classifier based on the extracted principal components has been developed to detect the simulations that miss the separation bubble behind the airfoil. The evaluative measures indicate that the model is able to detect most of the simulations where the separation region is poorly resolved. Besides the classifier, a machine learning regressor has been trained on the same PCA subspace to predict the error in the output drag coefficient. The predictions reveal that the regression model estimates accurate errors with a tight uncertainty bound. Further, more efficient models built on top of fewer PCA modes have been implemented that show similar performance. In addition, the developed models were used to inspect simulations solved on a different mesh configuration from the one the models were trained on. This generalization framework gives rise to some challenges that are thoroughly discussed. Overall, the results demonstrate that machine learning models based on the principal components of the data set are promising tools to detect possible missing flow features and predict numerical errors in CFD.
Time Series Based Hourly Traffic Flow Prediction on the GTA Freeways Using TSTVEC Model
Creators: name: Ma, Tao
name: Zhou, Zhou
name: Abdulhai, Baher
name: Ma, Tao
name: Zhou, Zhou
name: Abdulhai, Baher
Publisher: name: Unknown
Year: 2016
Subjects: Public Economics

description: Presented at the 51st CTRF (57th TRF) Joint Conference, May 1-4, 2016, Toronto, Ontario
Exploring levels of interest and barriers to pursuing further education among Canadian dental hygienists
Creators: name: Katyal, Shivalika
Publisher: name: University of British Columbia
Year: 2022

description: Background: Given the rise in chronic diseases, the World Health Organization states that building abilities of the health care workforce has become increasingly important to meet the complex needs of the public in the twenty-first century. Canada has seen a growing movement towards creating new pathways to further dental hygienists’ education to the baccalaureate level. The entry-to-practice credential for dental hygiene in Canada has remained a diploma. According to the 2021 Canadian Dental Hygienists Association (CDHA) Job Market and Employment survey, only 27% of respondents earned a bachelor’s degree. Existing literature explored motivating influences for pursuing degree education and practice outcomes associated with further education. However, a deepened exploration of barriers to pursuing additional education for Canadian dental hygienists is necessary. Objective: This project examined the levels of interest in and barriers to pursuing further education among Canadian dental hygienists who practised with a diploma as their highest educational credential. Methods: E-focus groups were held to inform the construction of the online national survey. The online survey was distributed to CDHA members. The survey collected demographic information, levels of interest, and barriers to pursuing further education. Quantitative data were analyzed using SPSS version 28.0 software and qualitative data using Saldaña’s approach of assigning descriptive and in-vivo coding. Results: Of 918 dental hygiene respondents, 553 (60%) expressed an interest in pursuing further education. Barriers to pursuing further education included: time (56%), finances (53%), family commitments (51%), work responsibilities (48%), stress/anxiety of returning to school (40%), accessibility to education (34%), unfamiliarity with existing programs (34%), not being aware of eligibility (32%), competitive application process (27%), employer support (25%), family support (18%), completing online courses/using technology is intimidating (18%), and lack of reliable internet service (13%). Levels of interest and barriers to pursuing further education were compared with survey demographic data to identify associations. Majority of respondents (92%) indicated perceived benefits to pursuing further education. Conclusion: Barriers were identified in both the e-focus groups and online survey. National and provincial associations, and educational institutions can use the results to help reduce barriers and raise awareness for post-diploma education for Canadian dental hygienists.
title: Air Pollution and Outdoor Recreation on Urban Trails: A Case Study of the Elizabeth River Trail, Norfolk, VA
Creators: name: McCann, James E.
Publisher: name: Old Dominion University Libraries
Year: 2020

description: Poor air quality represents a significant health risk, especially when recreating outdoors in urban parks and trails. It is important for managers of urban parks and trail to understand how potential visitors’ perceptions of air quality and health risks and benefits may affect visitation. The goal of this study was to investigate temporal variance in air quality along the Elizabeth River Trail, an urban trail located in Norfolk, Virginia, as well as trail users’ perceptions of air quality and of health benefits in relation to trail use. The researcher rode a bicycle with a Dylos DC1700-PM mobile air quality monitor mounted to it along the 16.9-km (10mi) trail for 10 weeks to collect PM2.5 and PM10 data. The following spring, a visitor use survey was conducted with ERT users, measuring perceived health outcomes and perceived air quality, as well as other experiential factors. Two repeated-measures analyses of variance (ANOVAs) were used to determine whether there were significant differences in average PM density at different times of day or days of the week. PM was higher (p < .001) between 11am-1pm and on weekends. Perceived air quality and health outcomes were regressed onto self-reported trail use. Perceived health outcomes, but not perceived or preferred air quality, significantly predicted trail use, p = .006. Results suggest that whereas motivation directly predicts recreational choices, experiential factors may do so only under specific circumstances, such as when air quality is very poor. Further research is merited to determine how experiential factors can best be integrated with other theories of motivation to understand recreational decision-making.
Nonlinear Compton scattering in ultra-short laser pulses
Creators: name: Mackenroth, F.
name: Di Piazza, A.
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: A detailed analysis of the photon emission spectra of an electron scattered by a laser pulse containing only very few cycles of the carrying electromagnetic field is presented. The analysis is performed in the framework of strong-field quantum electrodynamics, with the laser field taken into account exactly in the calculations. We consider different emission regimes depending on the laser intensity, placing special emphasis on the regime of one-cycle beams and of high laser intensities, where the emission spectra depend nonperturbatively on the laser intensity. In this regime we in particular present an accurate stationary phase analysis of the integrals that are shown to determine the computed emission spectra. The emission spectra show significant differences with respect to those in a long pulsed or monochromatic laser field: the emission lines obtained here are much broader and, more important, no dressing of the electron mass is observed.
description: 31 pages, 15 figures
Simulating the Impacts of RFID Lanes at the Canada-US Border: An Application to the Windsor-Detroit Corridor
Creators: name: Khan, Shakil
name: Maoh, Hanna
name: Anderson, William
name: Khan, Shakil
name: Maoh, Hanna
name: Anderson, William
Publisher: name: Unknown
Year: 2016
Subjects: Public Economics

description: Presented at the 51st CTRF (57th TRF) Joint Conference, May 1-4, 2016, Toronto, Ontario
Proper holomorphic mappings between symmetrized ellipsoids
Creators: name: Zapalowski, Pawel
Publisher: name: arXiv
Year: 2010
Subjects: subject: Complex Variables (math.CV)
subject: FOS: Mathematics
subject: 32H35, 32A07

description: We characterize the existence of proper holomorphic mappings in the special class of bounded $(1,2,...,n)$-balanced domains in $\mathbb{C}^n$, called the symmetrized ellipsoids. Using this result we conclude that there are no non-trivial proper holomorphic self-mappings in the class of symmetrized ellipsoids. We also describe the automorphism groupof these domains.
description: 10 pages, some modifications
Impacts of Illegal On-Street Parking on Toronto's CBD Congestion
Creators: name: Ramadan, Ahmed
name: Roorda, Matthew
name: Ramadan, Ahmed
name: Roorda, Matthew
Publisher: name: Unknown
Year: 2016
Subjects: Public Economics

description: Presented at the 51st CTRF (57th TRF) Joint Conference, May 1-4, 2016, Toronto, Ontario
Finite-Size-Scaling at the Jamming Transition: Corrections to Scaling and the Correlation Length Critical Exponent
Creators: name: Vagberg, Daniel
name: Valdez-Balderas, Daniel
name: Moore, M. A.
name: Olsson, Peter
name: Teitel, S.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We carry out a finite size scaling analysis of the jamming transition in frictionless bi-disperse soft core disks in two dimensions. We consider two different jamming protocols: (i) quench from random initial positions, and (ii) quasistatic shearing. By considering the fraction of jammed states as a function of packing fraction for systems with different numbers of particles, we determine the spatial correlation length critical exponent $ν\approx 1$, and show that corrections to scaling are crucial for analyzing the data. We show that earlier numerical results yielding $ν<1$ are due to the improper neglect of these corrections.
description: 5 pages, 4 figures -- slightly revised version as accepted for Phys. Rev. E Rapid Communications
Bayesian Linear Regression Performance Model for the Libyan National Road Netowrk without an Initial Database on Its Condition Based on Expert's Knowledge
Creators: name: Heba, Abdussalam
name: Assaf, Gabriel J.
name: Heba, Abdussalam
name: Assaf, Gabriel J.
Publisher: name: Unknown
Year: 2016
Subjects: Public Economics

description: Presented at the 51st CTRF (57th TRF) Joint Conference, May 1-4, 2016, Toronto, Ontario
Bunch-by-bunch measurement of transverse coherent beam-beam modes in the Fermilab Tevatron collider
Creators: name: Stancari, Giulio
name: Valishev, Alexander
Publisher: name: arXiv
Year: 2011
Subjects: subject: Accelerator Physics (physics.acc-ph)
subject: FOS: Physical sciences

description: A system for bunch-by-bunch detection of transverse proton and antiproton coherent oscillations in the Tevatron is described. It is based on the signal from a single beam-position monitor located in a region of the ring with large amplitude functions. The signal is digitized over a large number of turns and Fourier-analyzed offline with a dedicated algorithm. To enhance the signal, band-limited noise is applied to the beam for about 1 s. This excitation does not adversely affect the circulating beams even at high luminosities. The device has a response time of a few seconds, a frequency resolution of 1.6e-5 in fractional tune, and it is sensitive to oscillation amplitudes of 60 nm. It complements Schottky detectors as a diagnostic tool for tunes, tune spreads, and beam-beam effects. Measurements of coherent mode spectra are presented to show the effects of betatron tunes, beam-beam parameter, and collision pattern, and to provide an experimental basis for beam-beam numerical codes. Comparisons with a simplified model of beam-beam oscillations are also described.
description: 21 pages, 13 figures, 1 table
Black Hole Formation in Failing Core-Collapse Supernovae
Creators: name: O'Connor, Evan
name: Ott, Christian D.
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We present results of a systematic study of failing core-collapse supernovae and the formation of stellar-mass black holes (BHs). Using our open-source general-relativistic 1.5D code GR1D equipped with a three-species neutrino leakage/heating scheme and over 100 presupernova models, we study the effects of the choice of nuclear equation of state (EOS), zero-age main sequence (ZAMS) mass and metallicity, rotation, and mass-loss prescription on BH formation. We find that the outcome, for a given EOS, can be estimated, to first order, by a single parameter, the compactness of the stellar core at bounce. By comparing protoneutron star (PNS) structure at the onset of gravitational instability with solutions of the Tolman-Oppenheimer-Volkof equations, we find that thermal pressure support in the outer PNS core is responsible for raising the maximum PNS mass by up to 25% above the cold NS value. By artificially increasing neutrino heating, we find the critical neutrino heating efficiency required for exploding a given progenitor structure and connect these findings with ZAMS conditions, establishing, albeit approximately, for the first time based on actual collapse simulations, the mapping between ZAMS parameters and the outcome of core collapse. We also study the effect of progenitor rotation and find that the dimensionless spin of nascent BHs may be robustly limited below a^* = Jc/GM^2 = 1 by the appearance of nonaxisymmetric rotational instabilities.
description: 20 emulateapj pages, 13 figures, published in the Astrophysical Journal, minor revisions