cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Slow decay processes of electrostatically trapped Rydberg NO molecules
Creators: name: Deller, A.
name: Rayment, M. H.
name: Hogan, S. D.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: Nitric oxide (NO) molecules initially traveling at 795 m/s in pulsed supersonic beams have been photoexcited to long-lived hydrogenic Rydberg-Stark states, decelerated and electrostatically trapped in a cryogenically cooled, chip-based transmission-line Rydberg-Stark decelerator. The decelerated and trapped molecules were detected $in$ $situ$ by pulsed electric field ionization. The operation of the decelerator was validated by comparison of the experimental data with the results of numerical calculations of particle trajectories. Studies of the decay of the trapped molecules on timescales up to 1 ms provide new insights into the lifetimes of, and effects of blackbody radiation on, Rydberg states of NO.
description: 6 pages, 5 figures
Parametric coupling between macroscopic quantum resonators
Creators: name: Tian, L.
name: Allman, M. S.
name: Simmonds, R. W.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Time-dependent linear coupling between macroscopic quantum resonator modes generates both a parametric amplification also known as a {}"squeezing operation" and a beam splitter operation, analogous to quantum optical systems. These operations, when applied properly, can robustly generate entanglement and squeezing for the quantum resonator modes. Here, we present such coupling schemes between a nanomechanical resonator and a superconducting electrical resonator using applied microwave voltages as well as between two superconducting lumped-element electrical resonators using a r.f. SQUID-mediated tunable coupler. By calculating the logarithmic negativity of the partially transposed density matrix, we quantitatively study the entanglement generated at finite temperatures. We also show that characterization of the nanomechanical resonator state after the quantum operations can be achieved by detecting the electrical resonator only. Thus, one of the electrical resonator modes can act as a probe to measure the entanglement of the coupled systems and the degree of squeezing for the other resonator mode.
description: 15 pages, 4 figures, submitted
Transit Trade and Intercontinental Trade during the Late Middle Ages: Textiles and Spices in the Customs Accounts of Brașov and Sibiu
Creators: name: Mária, Pakucs-Willcocks
Publisher: name: Zenodo
Year: 2018
Subjects: spices, textiles, Western cloth, Turkish textiles, cotton, trade, international trade, regional trade, sixteenth century

description: This study examines the dynamics of the trade in textiles and spices transiting the customs points on the southern Transylvanian border at the turn of the sixteenth century.
The effects of self-interacting dark matter on the stripping of galaxies that fall into clusters
Creators: name: Sirks, Ellen L.
name: Oman, Kyle A.
name: Robertson, Andrew
name: Massey, Richard
name: Frenk, Carlos
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We use the Cluster-EAGLE (C-EAGLE) hydrodynamical simulations to investigate the effects of self-interacting dark matter (SIDM) on galaxies as they fall into clusters. We find that SIDM galaxies follow similar orbits to their Cold Dark Matter (CDM) counterparts, but end up with ${\sim}$25 per cent less mass by the present day. One in three SIDM galaxies are entirely disrupted, compared to one in five CDM galaxies. However, the excess stripping will be harder to observe than suggested by previous DM-only simulations because the most stripped galaxies form cores and also lose stars: the most discriminating objects become unobservable. The best test will be to measure the stellar-to-halo mass relation (SHMR) for galaxies with stellar mass $10^{10-11}\,\mathrm{M}_{\odot}$. This is 8 times higher in a cluster than in the field for a CDM universe, but 13 times higher for an SIDM universe. Given intrinsic scatter in the SHMR, these models could be distinguished with noise-free galaxy-galaxy strong lensing of ${\sim}32$ cluster galaxies.
Dark matter accretion wakes of high-redshift black holes
Creators: name: Mohayaee, Roya
name: Colin, Jacques
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Anisotropic emission of gravitational waves during the merger or formation of black holes can lead to the ejection of these black holes from their host galaxies. A recoiled black hole which moves on an almost radial bound orbit outside the virial radius of its central galaxy, in the cold dark matter background, reaches its apapsis in a finite time. The low value of dark matter velocity dispersion at high redshifts and also the black hole velocity near the apapsis passage yield a high-density wake around these black holes. Gamma-ray emission can result from the enhancement of dark matter annihilation in these wakes. The diffuse high-energy gamma-ray background from the ensemble of such black holes in the Hubble volume is also evaluated.
description: Talk presented at "Jean-Pierre Lasota, X-ray binaries, accretion disks and compact stars" (October 2007); Abramowicz, M. Ed., New Astronomy Review, in press
Coupling with the stationary distribution and improved sampling for colorings and independent sets
Creators: name: Hayes, Thomas P.
name: Vigoda, Eric
Publisher: name: arXiv
Year: 2006
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60J10 (Primary) 68W20 (Secondary)

description: We present an improved coupling technique for analyzing the mixing time of Markov chains. Using our technique, we simplify and extend previous results for sampling colorings and independent sets. Our approach uses properties of the stationary distribution to avoid worst-case configurations which arise in the traditional approach. As an application, we show that for $k/Δ>1.764$, the Glauber dynamics on $k$-colorings of a graph on $n$ vertices with maximum degree $Δ$ converges in $O(n\log n)$ steps, assuming $Δ=Ω(\log n)$ and that the graph is triangle-free. Previously, girth $\ge 5$ was needed. As a second application, we give a polynomial-time algorithm for sampling weighted independent sets from the Gibbs distribution of the hard-core lattice gas model at fugacity $λ
description: Published at http://dx.doi.org/10.1214/105051606000000330 in the Annals of Applied Probability (http://www.imstat.org/aap/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Survival and extreme statistics of work, heat, and entropy production in steady-state heat engines
Creators: name: Manzano, Gonzalo
name: Roldán, Édgar
Publisher: name: arXiv
Year: 2021
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We derive universal bounds for the finite-time survival probability of the stochastic work extracted in steady-state heat engines and the stochastic heat dissipated to the environment. We also find estimates for the time-dependent thresholds that these quantities does not surpass with a prescribed probability. At long times, the tightest thresholds are proportional to the large deviation functions of stochastic entropy production. Our results entail an extension of martingale theory for entropy production, for which we derive universal inequalities involving its maximum and minimum statistics that are valid for generic Markovian dynamics in non-equilibrium stationary states. We test our main results with numerical simulations of a stochastic photoelectric device.
description: 5+4 pages; 3+1 figures. v2: 6+4 pages, 3+2 figures (format changed, presentation improved, extra figure). Accepted in Phys. Rev. E
Cosmology with relativistically varying physical constants
Creators: name: Gupta, Rajendra P.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We have shown that the varying physical constant model is consistent with the recently published variational approach wherein Einstein equations are modified to include the variation of the speed of light c, gravitational constant G and cosmological constant Λ using the Einstein-Hilbert action. The general constraint resulting from satisfying the local conservation laws and contracted Bianchi identities provides the freedom to choose the form of the variation of the constants as well as how their variations are related. When we choose dG/Gdt=3dc/cdt, c=c_0.exp[(a^α-1)], G=G_0.exp[3(a^α-1)] and Λ=Λ_0.exp[(a^(-α)-1)], where a is the scale factor and α=1.8, we are able to show that the resulting model: (a) fits the supernovae 1a observational data marginally better than the ΛCDM model; (b) determines the first peak in the power spectrum of the cosmic microwave background temperature anisotropies at multipole value of l=217.3; (c) calculates the age of the universe as 14.1 Gyr; and (d) finds the BAO acoustic scale to be 145.2 Mpc. These numbers are within less than 3% of the values derived using the ΛCDM model. Surprisingly we find that the dark-energy density is negative in a universe that has significant negative curvature and whose expansion is accelerating at a faster rate than predicted by the ΛCDM model.
description: 9 pages, 1 figure, 3 tables
Testing a patient-specific in-silico model to noninvasively estimate central blood pressure
Creators: name: Gallo, Caterina
name: Olbers, Joakim
name: Ridolfi, Luca
name: Scarsoglio, Stefania
name: Witt, Nils
Publisher: name: arXiv
Year: 2021
Subjects: subject: Medical Physics (physics.med-ph)
subject: Fluid Dynamics (physics.flu-dyn)
subject: Tissues and Organs (q-bio.TO)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: Purpose: To show some preliminary results about the possibility to exploit a cardiovascular mathematical model - made patient-specific by noninvasive data routinely measured during ordinary clinical examinations - in order to obtain sufficiently accurate central blood pressure (BP) estimates. Methods: A closed-loop multiscale (0D and 1D) model of the cardiovascular system is made patient-specific by using as model inputs the individual mean heart rate and left-ventricular contraction time, weight, height, age, sex and mean/pulse brachial BPs. The resulting framework is used to determine central systolic, diastolic, mean and pulse pressures, which are compared with the beat-averaged invasive pressures of 12 patients aged 72$\pm$6.61 years. Results: Errors in central systolic, diastolic, mean and pulse pressures by the model are 4.26$\pm$2.81 mmHg, 5.86$\pm$4.38 mmHg, 4.98$\pm$3.95 mmHg and 3.51$\pm$2.38 mmHg, respectively. Conclusion: The proposed modeling approach shows a good patient-specific response and appears to be potentially useful in clinical practice. However, this approach needs to be evaluated in a larger cohort of patients and could possibly be improved through more accurate oscillometric BP measurement methods.
description: 14 pages, 6 figures, 5 tables
Field-gradient measurement using a Stern-Gerlach atomic interferometer with butterfly geometry
Creators: name: Oh, Changhun
name: Kwon, Hyukjoon
name: Jiang, Liang
name: Kim, M. S.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: Atomic interferometers have been studied as a promising device for precise sensing of external fields. Among various configurations, a particular configuration with a butterfly-shaped geometry has been designed to sensitively probe field gradients. We introduce a Stern-Gerlach (SG) butterfly interferometer by incorporating magnetic field in the conventional butterfly-shaped configuration. Atomic trajectories of the interferometer can be flexibly adjusted by controlling magnetic fields to increase the sensitivity of the interferometer, while the conventional butterfly interferometer using Raman transitions can be understood as a special case. We also show that the SG interferometer can keep high contrast against a misalignment in position and momentum caused by the field gradient.
description: 9 pages, 4 figures, accepted for publication in Physical Review A
Stochastic Energetics of Quantum Transport
Creators: name: Ghosh, Pulak Kumar
name: Ray, Deb Shankar
Publisher: name: arXiv
Year: 2006
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We examine the stochastic energetics of directed quantum transport due to rectification of non-equilibrium thermal fluctuations. We calculate the quantum efficiency of a ratchet device both in presence and absence of an external load to characterize two quantifiers of efficiency. It has been shown that the quantum current as well as efficiency in absence of load (Stokes efficiency) is higher as compared to classical current and efficiency, respectively, at low temperature. The conventional efficiency of the device in presence of load on the other hand is higher for a classical system in contrast to its classical counterpart. The maximum conventional efficiency being independent of the nature of the bath and the potential remains the same for classical and quantum systems.
description: To be published in Phys. Rev. E
Large deviations for Markov jump processes with uniformly diminishing rates
Creators: name: Agazzi, Andrea
name: Andreis, Luisa
name: Patterson, Robert I. A.
name: Renger, D. R. Michiel
Publisher: name: Weierstrass Institute
Year: 2021
Subjects: subject: Large deviations
subject: chemical reaction networks
subject: jump Markov processes
subject: Freidlin--Wentzell theory
subject: 60F10
subject: 60J76
subject: 80A30

description: We prove a large-deviation principle (LDP) for the sample paths of jump Markov processes in the small noise limit when, possibly, all the jump rates vanish uniformly, but slowly enough, in a region of the state space. We further show that our assumptions on the decay of the jump rates are optimal. As a direct application of this work we relax the assumptions needed for the application of LDPs to, e.g., Chemical Reaction Network dynamics, where vanishing reaction rates arise naturally particularly the context of Mass action kinetics.
Derivation of effective models from heterogenous Cosserat media via periodic unfolding
Creators: name: Nika, Grigor
Publisher: name: Weierstrass Institute
Year: 2021
Subjects: subject: Cosserat continuum
subject: size effects
subject: homogenization
subject: periodic unfolding
subject: 35A15
subject: 35Q74
subject: 74M25
subject: 74Q15

description: We derive two different effective models from a heterogeneous Cosserat continuum taking into account the Cosserat intrinsic length of the constituents. We pass to the limit using homogenization via periodic unfolding and in doing so we provide rigorous proof to the results introduced by Forest, Pradel, and Sab (Int. J. Solids Structures 38 (26-27): 4585-4608 '01). Depending on how different characteristic lengths of the domain scale with respect to the Cosserat intrinsic length, we obtain either an effective classical Cauchy continuum or an effective Cosserat continuum. Moreover, we provide some corrector type results for each case.
Adiabatic Sensing Technique for Optimal Temperature Estimation using Trapped Ions
Creators: name: Kirkova, Aleksandrina V.
name: Li, Weibin
name: Ivanov, Peter A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We propose an adiabatic method for optimal phonon temperature estimation using trapped ions which can be operated beyond the Lamb-Dicke regime. The quantum sensing technique relies on a time-dependent red-sideband transition of phonon modes, described by the non-linear Jaynes-Cummings model in general. A unique feature of our sensing technique is that the relevant information of the phonon thermal distributions can be transferred to the collective spin-degree of freedom. We show that each of the thermal state probabilities is adiabatically mapped onto the respective collective spin-excitation configuration and thus the temperature estimation is carried out simply by performing a spin-dependent laser fluorescence measurement at the end of the adiabatic transition. We characterize the temperature uncertainty in terms of the Fisher information and show that the state projection measurement saturates the fundamental quantum Cramér-Rao bound for quantum oscillator at thermal equilibrium.
description: 8 pages, 7 figures
The geodesic rule and the spectrum of the vacuum
Creators: name: Kalogeropoulos, Nikos
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We analyze the consequences of a recent argument justifying the validity of the "geodesic rule" which can be used to determine the density of global topological defects. We derive a formula that provides a rough estimate of the number of string-like defects formed in a phase transition. We apply this formula to vacua which are spheres. We provide some reasons for the deviation of our predictions from the corresponding accepted values.
description: 11 pages. Accepted by Mod. Phys. Lett. A
Probing Higgs exotic decay at the LHC with machine learning
Creators: name: Jung, Sunghoon
name: Liu, Zhen
name: Wang, Lian-Tao
name: Xie, Ke-Pan
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We study the tagging of Higgs exotic decay signals using different types of deep neural networks (DNNs), focusing on the $W^\pm h$ associated production channel followed by Higgs decaying into $n$ $b$-quarks with $n=4$, 6 and 8. All the Higgs decay products are collected into a fat-jet, to which we apply further selection using the DNNs. Three kinds of DNNs are considered, namely convolutional neural network (CNN), recursive neural network (RecNN) and particle flow network (PFN). The PFN can achieve the best performance because its structure allows enfolding more information in addition to the four-momentums of the jet constituents, such as particle ID and tracks parameters. Using the PFN as an example, we verify that it can serve as an efficient tagger even though it is trained on a different event topology with different $b$-multiplicity from the actual signal. The projected sensitivity to the branching ratio of Higgs decaying into $n$ $b$-quarks at the HL-LHC are 10\%, 3\% and 1\%, for $n=4$, 6 and 8, respectively.
description: 9 pages, 7 figures, 2 tables. To match the PRD version
Inexact tensor methods and their application to stochastic convex optimization
Creators: name: Agafonov, Artem
name: Kamzolov, Dmitry
name: Dvurechensky, Pavel
name: Gasnikov, Alexander
Publisher: name: Weierstrass Institute
Year: 2021
Subjects: subject: High-order methods
subject: tensor methods
subject: convex optimization
subject: inexact derivatives
subject: stochastic optimization
subject: 90C30
subject: 90C25
subject: 68Q25

description: We propose a general non-accelerated tensor method under inexact information on higher- order derivatives, analyze its convergence rate, and provide sufficient conditions for this method to have similar complexity as the exact tensor method. As a corollary, we propose the first stochastic tensor method for convex optimization and obtain sufficient mini-batch sizes for each derivative.
Redshift Distribution of Extragalactic 24 micron Sources
Creators: name: Desai, Vandana
name: Soifer, B. T.
name: Dey, Arjun
name: Jannuzi, Buell T.
name: Floc'h, Emeric Le
name: Bian, Chao
name: Brand, Kate
name: Brown, Michael J. I.
name: Armus, Lee
name: Weedman, Dan W.
name: Cool, Richard
name: Stern, Daniel
name: Brodwin, Mark
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present the redshift distribution of a complete, unbiased sample of 24 micron sources down to fnu(24 micron) = 300 uJy (5-sigma). The sample consists of 591 sources detected in the Bootes field of the NOAO Deep Wide-Field Survey. We have obtained optical spectroscopic redshifts for 421 sources (71%). These have a redshift distribution peaking at z~0.3, with a possible additional peak at z~0.9, and objects detected out to z=4.5. The spectra of the remaining 170 (29%) exhibit no strong emission lines from which to determine a redshift. We develop an algorithm to estimate the redshift distribution of these sources, based on the assumption that they have emission lines but that these lines are not observable due to the limited wavelength coverage of our spectroscopic observations. The redshift distribution derived from all 591 sources exhibits an additional peak of extremely luminous (L(8-1000 micron) > 3 x 10^{12} Lsun) objects at z~2, consisting primarily of sources without observable emission lines. We use optical line diagnostics and IRAC colors to estimate that 55% of the sources within this peak are AGN-dominated. We compare our results to published models of the evolution of infrared luminous galaxies. The models which best reproduce our observations predict a large population of star-formation dominated ULIRGs at z > 1.5 rather than the AGN-dominated sources we observe.
description: 21 pages, 11 figures; accepted for publication in ApJ
Quantum master equation scheme of time-dependent density functional theory to time-dependent transport in nano-electronic devices
Creators: name: Li, Xin-Qi
name: Yan, YiJing
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: In this work a practical scheme is developed for the first-principles study of time-dependent quantum transport. The basic idea is to combine the transport master-equation with the well-known time-dependent density functional theory. The key ingredients of this paper include: (i) the partitioning-free initial condition and the consideration of the time-dependent bias voltages which base our treatment on the Runge-Gross existence theorem; (ii) the non-Markovian master equation for the reduced (many-body) central system (i.e. the device); and (iii) the construction of Kohn-Sham master equation for the reduced single-particle density matrix, where a number of auxiliary functions are introduced and their equations of motion (EOM) are established based on the technique of spectral decomposition. As a result, starting with a well-defined initial state, the time-dependent transport current can be calculated simultaneously along the propagation of the Kohn-Sham master equation and the EOM of the auxiliary functions.
description: 9 pages, no figures
Hierarchy of beam models for lattice core sandwich structures
Creators: name: Karttunen, Anssi T.
name: Reddy, J. N.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: A discrete-to-continuum transformation to model 2-D discrete lattices as energetically equivalent 1-D continuum beams is developed. The study is initiated in a classical setting but results in a non-classical two-scale micropolar beam model via a novel link within a unit cell between the second-order macrorotation-gradient and the micropolar antisymmetric shear deformation. The shear deformable micropolar beam is reduced to a couple-stress and two classical lattice beam models by successive approximations. The stiffness parameters for all models are given by the micropolar constitutive matrix. The four models are compared by studying stretching- and bending-dominated lattice core sandwich beams under various loads and boundary conditions. A classical 4th-order Timoshenko beam is an apt first choice for stretching-dominated beams, whereas the 6th-order micropolar model works for bending-dominated beams as well. The 6th-order couple-stress beam is often too stiff near point loads and boundaries. It is shown that the 1-D micropolar model leads to the exact 2-D lattice response in the absence of boundary effects even when the length of the 1-D beam (macrostructure) equals that of the 2-D unit cell (microstructure), that is, when L=l.
description: This work has received funding from the European Union's Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie Action grant agreement No 745770 - SANDFECH - Micromechanics-based finite element modeling of sandwich structures. The preprint has been replaced by the accepted manuscript
"Europa" als Thema in den bilateralen theologischen Dialogen zwischen orthodoxen Patriarchaten und der EKD
Creators: name: Illert, Martin
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 65 Nr. 1 (2016): Ökumenische Rundschau, Band 65, Heft 1
"Soft bang" instead of "big bang": model of an inflationary universe without singularities and with eternal physical past time
Creators: name: Rebhan, E.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The solution for an inflationary universe without singularities is derived from the Einstein-Lemaitre equations. The present state of the universe evolved from a steady state solution for a tiny, but classical micro-universe with large cosmological constant or large equivalent vacuum energy density and with an equal energy density of radiation and/or some kind of relativistic primordial matter in the infinite past. An instability of this state outside the quantum regime caused a "soft bang" by triggering an expansion that smoothly started with zero expansion rate, continuously increased, culminated in an exponentially inflating phase and ended through a phase transition, the further evolution being a Friedmann-Lemaitre evolution as in big bang models. As a necessary implication of the model the universe must be closed. All other parameters of the model are very similar to those of big bang models and comply with observational constraints.
description: 21 pages, 5 figures
IIARP International Conference, Abstract Proceedings Series 2024 (Vol.2, No.2)
Creators: name: IIARP Conference
Publisher: name: F1000 Research Limited
Year: 2024

description: IIARP International Conferences 2024: A Global Hub for Innovation

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Discrete dynamic viscoelastic systems and vibration analysis of an engine supported on viscoelastic mounts
Creators: name: Muravyov, Alexander
Publisher: name: University of British Columbia
Year: 2009

description: An analysis of linear dynamic viscoelastic discrete systems is presented, and its application to the vibration of an engine supported on viscoelastic mounts is discussed. A new procedure is developed which allows exact (closed form) homogeneous solutions in the time domain to be derived for a dynamic system consisting of isotropic viscoelastic components, for which the relaxation kernels are represented as a sum of exponentials. The developed procedure (which is given a name "substitution method") for determination of closed form solutions is extended to the solution of boundary value problems. The application of the substitution method is also extended to the case of periodic loading. Based on this method, a numerical investigation of free and forced vibration responses of some viscoelastic systems is presented. Several approximation techniques are developed in this study which allow the parameters of the relaxation kernels (represented as a sum of exponentials) to be determined from experimental data. Also a numerical procedure for determination of complex moduli of isotropic viscoelastic materials is developed, in which certain experimental data related to the material specimen are required as input information. A hereditary (viscoelastic) stiffness matrix-operator is obtained by replacement of the elastic constants in the elastic stiffness matrix by the corresponding viscoelastic operators, or by complex moduli (for steady-state response problems). Comparison of experimental results (in terms of steady-state responses) with the numerical ones is presented. The sufficient conditions of diagonalization of discrete viscoelastic systems are formulated in this study. Analysis of the conditions of overdamping of a simple viscoelastic single-degree-of-freedom system is conducted, and new results concerned with this analysis are demonstrated. A particular case of a dynamic viscoelastic system (an internal combustion engine on elastomeric mounts) is given special consideration. A new dynamic model of an enginemount system is developed where rotating and reciprocating parts lead to the mass matrix and velocity matrix (matrix-coefficient at the velocity vector) as periodic functions of time. The derivation of the equations of motion on the basis of Lagrange's equations is demonstrated. An analysis of parametric resonance phenomena for some examples of engine-mount systems is conducted. A method for steady-state response calculations for the case of time-dependent (periodic) matrices in the equation of motion is developed and some numerical results are presented. An optimization problem is posed and solved with the associated constraints and the objective function reflecting the optimum criteria of the performance of an engine-mount system. As a result, the optimum parameters of the mount material are determined.
Recycling qubits for the generation of Bell nonlocality between independent sequential observers
Creators: name: Cheng, Shuming
name: Liu, Lijun
name: Baker, Travis J.
name: Hall, Michael J. W.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: There is currently much interest in the recycling of entangled systems, for use in quantum information protocols by sequential observers. In this work, we study the sequential generation of Bell nonlocality via recycling one or both components of two-qubit states. We first give a description of two-valued qubit measurements in terms of measurement bias, strength, and reversibility, and derive useful tradeoff relations between them. Then, we derive one-sided monogamy relations for unbiased observables, that strengthen the recent Conjecture in [S. Cheng {\it et al.}, Phys. Rev. A \textbf{104}, L060201 (2021) ] that if the first pair of observers violate Bell nonlocality then a subsequent independent pair cannot, and give semi-analytic results for the best possible monogamy relation. We also extend the construction in [P. J. Brown and R. Colbeck, Phys. Rev. Lett. \textbf{125}, 090401 (2020)] to obtain (i)~a broader class of two-qubit states that allow the recycling of one qubit by a given number of observers on one side, and (ii)~a scheme for generating Bell nonlocality between arbitrarily many independent observers on each side, via the two-sided recycling of multiqubit states. Our results are based on a formalism that is applicable to more general problems in recycling entanglement, and hence is expected to aid progress in this field.
description: Minor corrections, More references, and revision of Fig. 2
Letter from Billings and Cochrane to the Rainbow Ranche, December 1, 1910
Creators: name: Billings & Cochrane
Publisher: name: The University of British Columbia
Year: 2017

description: Letter to the Rainbow Ranche from Billings & Cochrane, dated December 1, 1910, regarding a deed made to the Okanagan Valley Land Company to protect the Ranche as to the "right of way" for irrigation purposes and fencing.
Methodologische Implikationen der interpretativen Zugänge zur Erforschung des religiösen Wandels in den postsozialisitschen Ländern
Creators: name: Zeltner Pavlovic, Irena
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 65 Nr. 1 (2016): Ökumenische Rundschau, Band 65, Heft 1
Neoantigen homology and predicting response to immune checkpoint blockade in cancer
Creators: name: Ahuja, Arun
name: Tavi Nathanson
name: Rubinsteyn, Alex
name: Snyder, Alexandra
name: Hellman, Matt
name: Chan, Timothy
name: Merghoub, Taha
name: Jedd Wolchok
name: Hammerbacher, Jeff
Publisher: name: F1000Research
Year: 2015

description: Recent work has revealed that nonsynonymous mutation burden and candidate neoantigen burden significantly correlate with durable clinical benefit to anti-CTLA-4 treated melanomas and anti-PD-1 treated lung cancers. Using cancer exome and RNAseq data we further investigated covariates with immune checkpoint inhibitor response.

Patients:treated with ipilimumab or tremelimumab44/64 patients were classified as cutaneous melanoma34/64 samples were taken prior to treatment  checkpoint inhibitor response.
Conclusions:Mutational burden is correlated with benefit.A higher percentage of UV mutations is correlated with mutational burden.  Predicted neoantigen burden is correlated with benefit. Mutational burden increases the number of organisms matched in IEDB.Higher HLA expression was correlated with benefit in both pre- and post-treatment samples, independent of mutational burden.
Defying the Gibbs Phase Rule: Evidence for an Entropy-Driven Quintuple Point in Colloid-Polymer Mixtures
Creators: name: Peters, V. F. D.
name: Vis, M.
name: García, Á. González
name: Wensink, H. H.
name: Tuinier, R.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: Using a minimal algebraic model for the thermodynamics of binary rod--polymer mixtures, we provide evidence for a quintuple phase equilibrium; an observation that seems to be at odds with the Gibbs phase rule for two-component systems. Our model is based on equations of state for the relevant liquid crystal phases that are in quantitative agreement with computer simulations. We argue that the appearance of a quintuple equilibrium, involving an isotropic fluid, a nematic and smectic liquid crystal, and two solid phases can be reconciled with a generalized Gibbs phase rule in which the two intrinsic length scales of the athermal colloid--polymer mixture act as additional field variables.
The Sun's Journey Through the Local Interstellar Medium: The PaleoLISM and Paleoheliosphere
Creators: name: Frisch, P. C.
name: Slavin, J. D.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Over the recent past, the galactic environment of the Sun has differed substantially from today. Sometime within the past ~130,000 years, and possibly as recent as ~56,000 years ago, the Sun entered the tenuous tepid partially ionized interstellar material now flowing past the Sun. Prior to that, the Sun was in the low density interior of the Local Bubble. As the Sun entered the local ISM flow, we passed briefly through an interface region of some type. The low column densities of the cloud now surrounding the solar system indicate that heliosphere boundary conditions will vary from opacity considerations alone as the Sun moves through the cloud. These variations in the interstellar material surrounding the Sun affected the paleoheliosphere.
description: To be published in Astrophysics and Space Sciences Transactions (ASTRA), for the proceedings of the workshop "Future Perspectives in Heliospheric Research: Unsolved Problems, New Missions - New Sciences" Bad Honnef, Germany, April 6-8, 2005, held in honor of Prof. Hans Fahr's 65th birthday
Asymptotics and Hamiltonians in a First order formalism
Creators: name: Ashtekar, Abhay
name: Engle, Jonathan
name: Sloan, David
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We consider 4-dimensional space-times which are asymptotically flat at spatial infinity and show that, in the first order framework, action principle for general relativity is well-defined \emph{without the need of infinite counter terms.} It naturally leads to a covariant phase space in which the Hamiltonians generating asymptotic symmetries provide the total energy-momentum and angular momentum of the space-time. We address the subtle but important problems that arise because of logarithmic translations and super-translations both in the Langrangian and Hamiltonian frameworks. As a forthcoming paper will show, the treatment of higher dimensions is considerably simpler. Our first order framework also suggests a new direction for generalizing the spectral action of non-commutative geometry.
description: 18 pages, No figures. Added a footnote 2 and two references
A Survey of CH2DOH Towards Starless and Prestellar Cores in the Taurus Molecular Cloud
Creators: name: Ambrose, Hannah E.
name: Shirley, Yancy L.
name: Scibelli, Samantha
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Recent observations indicate that organic molecules are prevalent towards starless and prestellar cores. Deuteration of these molecules has not been well-studied during the starless phase. Published observations of singly-deuterated methanol, CH$_2$DOH, have only been observed in a couple of well-studied, dense and evolved prestellar cores (e.g. L1544, L183). Since the formation of gas-phase methanol during this cold phase is believed to occur via desorption from the icy grain surfaces, observations of CH$_2$DOH may be useful as a probe of the deuterium fraction in the ice mantles of dust grains. We present a systematic survey of CH$_2$DOH towards 12 starless and prestellar cores in the B10 region of the Taurus Molecular Cloud. Nine of the twelve cores are detected with [CH$_2$DOH]/[CH$_3$OH] ranging from $< 0.04$ to $0.23^{+0.12}_{-0.06}$ with a median value of $0.11$. Sources not detected tend to have larger virial parameters and larger methanol linewidths than detected sources. The results of this survey indicate that deuterium fractionation of organic molecules, such as methanol, during the starless phase may be more easily detectable than previously thought.
description: To be published in MNRAS
The SMRT way to sequence a yeast genome
Creators: name: Pérez-Bercoff, Åsa
name: Russell, Tonia
name: Attfield, Paul
name: Bell, Philip
name: Edwards, Richard
Publisher: name: F1000Research
Year: 2015

description: We have performed PacBio single molecule real time (SMRT) sequencing of three yeast whole genomes. A haploid reference yeast strain (S288C) and two novel diploid strains were sequenced as part of a larger functional genomics project. For each strain, 20kb SMRT Bell library preps were performed and sequenced on two SMRT Cells using the P6-C4 chemistry. Between 1.74 Gb and 2.55 Gb of usable sequence data was generated for each strain, with read lengths of up to 53.3 kb. Pure PacBio whole genome de novo assemblies were generated using the HGAP3 pipeline. We are using the S288C data to explore performance in comparison to the published genome as a reference. An initial assembly of S288C yielded over 99.9% genome coverage at 99.997% accuracy on only 26 unitigs, versus 17 reference chromosomes (16 nuclear chromosomes plus mitochondrion). Of these, 16 chromosomes were essentially returned as a single, complete unitig. We are now using the S288C data to optimise the assembly process and derive assembly settings for two novel strains. To this end, we have developed a new pipeline for the comparative assessment of high quality whole genomes against a reference. In this poster, we explore how good PacBio sequencing is for de novo genome sequencing in yeast with examples of both the power and limits of the technology.
Statistical Geometry and Hessian Structures on Pre-Leibniz Algebroids
Creators: name: Doğan, Keremcan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Differential Geometry (math.DG)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: We introduce statistical, conjugate connection and Hessian structures on anti-commutable pre-Leibniz algebroids. Anti-commutable pre-Leibniz algebroids are special cases of local pre-Leibniz algebroids, which are still general enough to include many physically motivated algebroids such as Lie, Courant, metric and higher-Courant algebroids. They create a natural framework for generalizations of differential geometric structures on a smooth manifold. The symmetrization of the bracket on an anti-commutable pre-Leibniz algebroid satisfies a certain property depending on a choice of an equivalence class of connections which are called admissible. These admissible connections are shown to be necessary to generalize aforementioned structures on pre-Leibniz algebroids. Consequently, we prove that, provided certain conditions, statistical and conjugate connection structures are equivalent when defined for admissible connections. Moreover, we also show that for `projected-torsion-free' connections, one can generalize Hessian metrics and Hessian structures. We prove that any Hessian structure yields a statistical structure, where these results are completely parallel to the ones in the manifold setting. We also prove a mild generalization of the fundamental theorem of statistical geometry. Moreover, we generalize $α$-connections, strongly conjugate connections and relative torsion operator, and prove some analogous results.
description: 23 pages
Inclusion of a crew safety node into the preliminary design of fishing vessels
Creators: name: Akintürk, Ayhan
Publisher: name: University of British Columbia
Year: 2009

description: The working and living conditions on-board of fishing vessels affect the crew's performance and well being. They contribute to occupational accidents on-board, which cost to the health and lives of crew members. There is also a cost of lost opportunity, when crew members can not perform their duties on-board and have to halt fishing due to deteriorated conditions at sea. In this thesis, a methodology that will allow the inclusion of crew comfort and safety considerations into the preliminary design of fishing vessels has been developed. This new methodology and the traditional preliminary design spired for monohull and SWATH (Small Waterplane Area Twin Hull) vessels have been implemented in Echidna, which is a logic programming environment that supports constraint based reasoning. In the literature, ship motions have been reported to be the most prominent contributory factor to the occupational accidents and crew's performance on-board. Hence, two sets of rules suitable to a knowledge-based environment and based on different engineering concepts have been developed and implemented for the preliminary design of fishing vessels to improve their seakeeping characteristics. Unlike some ship motions' calculation programs, for example SHIPMO, these rules do not require detailed hull form definition. Hence, they are used as guidelines (or heuristic rules) during the initial stages of ship design. Considering the nonlinear nature of ship design, the procedure developed was able to find a solution for a given design sea state and owner requirements. The effects of the rules on ship size, cost and improved seakeeping qualities are presented in this thesis. Additionally, monohull and SWATH vessels for the same owner requirements are compared in terms of vessel size and cost. Finally, the knowledge-based system described in this thesis provides a tool to map crew comfort levels and a design sea state to the vessel parameters. Hence the cost difference due to the crew comfort and safety considerations can be quantified. The methodology described here can easily be applied for small craft with small changes to the knowledge base. Keywords : ship design, crew safety, crew comfort, knowledge-based design, seakeeping.