cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The quasi-periodic Bose-Hubbard model and localization in one-dimensional cold atomic gases
Creators: name: Roux, G.
name: Barthel, T.
name: McCulloch, I. P.
name: Kollath, C.
name: Schollwoeck, U.
name: Giamarchi, T.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: We compute the phase diagram of the one-dimensional Bose-Hubbard model with a quasi-periodic potential by means of the density-matrix renormalization group technique. This model describes the physics of cold atoms loaded in an optical lattice in the presence of a superlattice potential whose wave length is incommensurate with the main lattice wave length. After discussing the conditions under which the model can be realized experimentally, the study of the density vs. the chemical potential curves for a non-trapped system unveils the existence of gapped phases at incommensurate densities interpreted as incommensurate charge-density wave phases. Furthermore, a localization transition is known to occur above a critical value of the potential depth V_2 in the case of free and hard-core bosons. We extend these results to soft-core bosons for which the phase diagrams at fixed densities display new features compared with the phase diagrams known for random box distribution disorder. In particular, a direct transition from the superfluid phase to the Mott insulating phase is found at finite V_2. Evidence for reentrances of the superfluid phase upon increasing interactions is presented. We finally comment on different ways to probe the emergent quantum phases and most importantly, the existence of a critical value for the localization transition. The later feature can be investigated by looking at the expansion of the cloud after releasing the trap.
description: 19 pages, 20 figures
Early-Stage Shear Viscosity far from Equilibrium via Holography
Creators: name: Wondrak, Michael F.
name: Kaminski, Matthias
name: Bleicher, Marcus
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Shear viscosity is a crucial property of QCD matter which determines the collective behavior of the the quark-gluon plasma (QGP) in ultrarelativistic heavy-ion collisions. Extending the near-equilibrium, high-precision investigations in theory and experiment, we take into account the fact that, in a collision, the QGP is generated far from equilibrium. We use the AdS/CFT correspondence to study a strongly coupled plasma and find a significant impact on the ratio of shear viscosity to entropy density, $η/s$. In particular, we investigate the initial heating phase and find a decrease reaching down to below 60% followed by an overshoot to 110% of the near-equilibrium value. This finding might be highly relevant for the extraction of transport coefficients from anisotropic flow measurements at RHIC and LHC.
description: 6 pages, 3 figures. Plenary Flash Talk given at the 28th International Conference on Ultrarelativistic Nucleus-Nucleus Collisions (Quark Matter 2019) Wuhan, China, November 4-9, 2019
"Erinnern und Vergessen. Biblisch-theologische Erinnerungen"
Creators: name: Swarat, Uwe
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 58 Nr. 3 (2009): Ökumenische Rundschau, Band 58, Heft 3
Dynamic light diffusion, Anderson localization and lasing in disordered inverted opals: 3D ab-initio Maxwell-Bloch computation
Creators: name: Conti, Claudio
name: Fratalocchi, Andrea
Publisher: name: arXiv
Year: 2008
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We report on 3D time-domain parallel simulations of Anderson localization of light in inverted disordered opals displaying a complete photonic band-gap. We investigate dynamic diffusion processes induced by femtosecond laser excitations, calculate the diffusion constant and the decay-time distribution versus the strength of the disorder. We report evidence of the transition from delocalized Bloch oscillations to strongly localized resonances in self-starting laser processes.
description: 4 pages, 5 figures
title: Three dimensional MHD simulations of the dynamics and energetics of coronal flux tubes
Creators: name: Howson, Thomas Alexander
Publisher: name: University of St Andrews
Year: 2019

description: In this thesis we present the results of three-dimensional MHD simulations of the evolution of magnetic flux tubes within the solar atmosphere. We consider the dynamics and energetics of coronal loops that are perturbed from an equilibrium state by wave motions or driven continuously by an imposed velocity field. In each case, we investigate the dissipation of magnetic and kinetic energy and evaluate the implications for the heating of coronal plasma. We present models of transversely oscillating flux tubes which experience rapid damping as kink mode energy is transferred into azimuthal Alfven modes. This mode conversion is typically associated with a density enhancement within the flux tube, however, we demonstrate that it can also proceed with an increased internal magnetic field strength. In either regime, the azimuthal wave modes are subject to dissipation through phase mixing and may promote the development of the magnetic Kelvin-Helmholtz instability. This is associated with the generation of further small scales in the magnetic and velocity fields and, in a non-ideal regime, will enhance the rate of wave dissipation. We show that the growth rate of the instability is sensitive to the implemented transport coefficients and the presence of helical magnetic field. Additionally, we consider the effects of thermal conduction and optically thin radiation on the evolution of a flux tube tectonics model. We present the results of simulations in which two magnetic flux tubes are twisted around each other by the action of rotational drivers imposed at the loop foot points. Large currents develop at the interface of the flux tubes and magnetic reconnection is triggered as the braiding progresses. The inclusion of conduction and optically thin radiation reduces the high temperatures and gas pressures observed in the centre of the numerical domain. As a result, these processes modify the reconnection outflows, distribution of plasma and the evolution of the magnetic field.
Regulation of HIV-1 transcription by RBF-1 and RBF-2
Creators: name: Bell, Brendan Bernard
Publisher: name: University of British Columbia
Year: 2009

description: Lentiviruses, including human immunodeficiency virus type 1 (HIV-1), characteristically form latent integrated proviruses whose transcription can be induced by extracellular signals. The level of HIV-1 gene expression is determined by the 5' long terminal repeat (LTR), which directs the host cell RNA polymerase II machinery to synthesize viral transcripts. The HIV-1 LTR responds to multiple signals, including the protein-tyrosine kinase (PTK)/Ras/Raf signaling pathway. Downstream nuclear targets of PTK/Ras/Raf are of interest because this pathway is implicated in the development of human tumors. This thesis describes experiments designed to determine the czs-acting sequences of the HIV-1 LTR that are necessary for Ras-responsiveness and to characterize the cellular transcription factors that bind to them. Data presented in this thesis demonstrate that Ras-responsive HIV-1 transcription requires two previously undescribed factors, RBF-1 and RBF-2. RBF-1 binds to Ets-like motifs located between nucleotides -151 and -142, and within the NF-kB binding sites. RBF-2 binds the HIV-1 LTR at nucleotides -131 to -121 and immediately 3' of the TATA box. RBF-1, or associated proteins, are phosphorylated in response to the activation of a PTK, v-fps. Moreover, RBF-1 contains the Ets family member GABPα, and an interacting protein, GABPβ₁. RBF-1 and RBF-2 appear to share similar DNA binding subunits of apparent molecular weight 100 K. Mutation of the RBF-1 and RBF-2 binding elements (RBEs) prevents Ras stimulation of HIV LTR-directed transcription. These data define a mechanism for Ras responsiveness of HIV-l transcription that requires GABP, as a component of RBF-1, and the previously uncharacterized cellular transcription factor, RBF-2.
Elicitation of verbs from "Creation of Animals"
Creators: name: Parker, Verdena
name: Newbold, Lindsey
name: Spence, Justin
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2022
Subjects: subject: hup

description: Audio file VP-300811-08: Elicitation of verbs from the "Creation of Animals" story (file VP-080309-03), focused on items that are not in the Hupa Language Dictionary.
The Generalised LKF Transformations for Arbitrary $N$-point Fermion Correlators
Creators: name: Ahmadiniaz, Naser
name: Edwards, James P.
name: Nicasio, José
name: Schubert, Christian
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We examine the non-perturbative gauge dependence of arbitrary configuration space fermion correlators in quantum electrodynamics (QED). First, we study the dressed electron propagator (allowing for emission or absorption of any number of photons along a fermion line) using the first quantised approach to quantum field theory and analyse its gauge transformation properties induced by virtual photon exchange. This is then extended to the $N$-point functions where we derive an exact, generalised version of the fully non-perturbative Landau-Khalatnikov-Fradkin (LKF) transformation for these correlators. We discuss some general aspects of application in perturbation theory and investigate the structure of the LKF factor about $D = 2$ dimensions.
description: 24 pages, 2 figures
Universal intermittent properties of particle trajectories in highly turbulent flows
Creators: name: ICTR
name: :
name: Arneodo, A.
name: Benzi, R.
name: Berg, J.
name: Biferale, L.
name: Bodenschatz, E.
name: Busse, A.
name: Calzavarini, E.
name: Castaing, B.
name: Cencini, M.
name: Chevillard, L.
name: Fisher, R. T.
name: Grauer, R.
name: Homann, H.
name: Lamb, D.
name: Lanotte, A. S.
name: Leveque, E.
name: Luethi, B.
name: Mann, J.
name: Mordant, N.
name: Mueller, W. -C.
name: Ott, S.
name: Ouellette, N. T.
name: Pinton, J. -F.
name: Pope, S. B.
name: Roux, S. G.
name: Toschi, F.
name: Xu, H.
name: Yeung, P. K.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We present a collection of eight data sets, from state-of-the-art experiments and numerical simulations on turbulent velocity statistics along particle trajectories obtained in different flows with Reynolds numbers in the range $R_λ\in [120:740]$. Lagrangian structure functions from all data sets are found to collapse onto each other on a wide range of time lags, revealing a universal statistics, and calling for a unified theoretical description. Parisi-Frisch Multifractal theory, suitable extended to the dissipative scales and to the Lagrangian domain, is found to capture intermittency of velocity statistics over the whole three decades of temporal scales here investigated.
description: 5 pages, 1 figure; content changed, references updated
On a complementary scale of crystal-field strength
Creators: name: Mulak, Jacek
name: Mulak, Maciej
Publisher: name: arXiv
Year: 2006
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: A new measure of the crystal-field strength, complementary to the conventional one, is defined. It is based on the rotational invariants |B_{k0}|_{av} or |\sum_{k}B_{k0}|_{av}, k=2,4,6, of the crystal-(ligand)-field (CF) Hamiltonian H_{CF} parametrizations, i.e. on the axial CF parameters modules averaged over all reference frame orientations. They turn out to be equal to |H_{CF}^{(k)}|_{av} and |H_{CF}|_{av}, respectively. While the traditional measure is established on the parametrization modules or on the second moment of the CF energy levels, the introduced scale employs rather the first moment of the energy modules and has better resolving power. The new scale is able to differentiate the strength of various iso-modular parametrizations according to the classes of rotationally equivalent parametrizations. Using both the compatible CF strength measures one may draw more accurate conclusions about the Stark levels arrays and particularly their total splitting magnitudes.
description: LaTex2e, 21 pages with 2 Postscript figures (7 tables); paper submitted to Journal of Physics A: Mathematical and General
Fractional Langevin Equation: Over-Damped, Under-Damped and Critical Behaviors
Creators: name: Burov, S.
name: Barkai, E.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The dynamical phase diagram of the fractional Langevin equation is investigated for harmonically bound particle. It is shown that critical exponents mark dynamical transitions in the behavior of the system. Four different critical exponents are found. (i) $α_c=0.402\pm 0.002$ marks a transition to a non-monotonic under-damped phase, (ii) $α_R=0.441...$ marks a transition to a resonance phase when an external oscillating field drives the system, (iii) $α_{χ_1}=0.527...$ and (iv) $α_{χ_2}=0.707...$ marks transition to a double peak phase of the "loss" when such an oscillating field present. As a physical explanation we present a cage effect, where the medium induces an elastic type of friction. Phase diagrams describing over-damped, under-damped regimes, motion and resonances, show behaviors different from normal.
description: 18 pages, 15 figures
title: Advanced laser beam shaping using spatial light modulators for material surface processing
Creators: name: Li, J
Publisher: name: University of Liverpool Repository
Year: 2018

description: Beam shaping is the process of redistributing the irradiance and phase of a beam of optical radiation. The beam shape is defined by the irradiance distribution. In recent years, laser beam shaping has been employed in many fields of scientific, engineering and industrial R&D for many applications, such as material processing, medical applications, lithography, optical data storage and laboratory research. In this thesis, a novel beam shaping technique is presented. Different from geometrical optics and diffractive methods, an imaging-based beam shaping system was built and tested. A laser beam was shaped using geometric masks applied on a spatial light modulator (SLM) at objective plane of a lens system and reconstructed at imaging plane. Geometric masks generated based on real beam profile can modulate both the outline profile and intensity distribution of the input laser. Laser parallel processing technique was also employed in this research to increase the beam shaping efficiency. The results obtained in this thesis demonstrate high accuracy and flexibility of this beam shaping technique, showing many potential applications.
The empirical upper limit for mass loss of cool main sequence stars
Creators: name: Lednicka, Anna
name: Stepien, K.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The knowledge of mass loss rates due to thermal winds in cool dwarfs is of crucial importance for modeling evolution of physical parameters of main sequence single and binary stars. Very few, sometimes contradictory, measurements of such mass loss rates exist up to now. We present a new, independent method of measuring an amount of mass lost by a star during its past life. It is based on the comparison of the present mass distribution of solar type stars in an open cluster with the calculated distribution under an assumption that stars with masses lower than M(lim) have lost an amount of mass equal to DeltaM. The actual value of DeltaM or its upper limit is found from the best fit. Analysis of four clusters: Pleiades, NGC 6996, Hyades and Praesepe gave upper limits for DeltaM in three of them and the inconclusive result for Pleiades. The most restrictive limit was obtained for Praesepe indicating that the average mass loss rate of cool dwarfs in this cluster was lower than 6x10^{-11} M(sun)/yr. With more accurate mass determinations of the solar type members of selected open clusters, including those of spectral type K, the method will provide more stringent limits for mass loss of cool dwarfs.
description: 5 pages, 2 figures, accepted to Astronomische Nachrichten
Excitation of Low-Frequency QPOs in Black Hole Accretion Flows
Creators: name: Machida, Mami
name: Matsumoto, Ryoji
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present the results of global three dimensional magneto-hydrodynamic simulations of black hole accretion flows. We focus on the dependence of numerical results on the gas temperature Tout supplied from the outer region. General relativistic effects are taken into account using the pseudo-Newtonian potential. We ignore the radiative cooling of the accreting gas. The initial state is a torus whose density maximum is at 35rs or 50rs from the gravitating center, where rs is the Schwarzschild radius. The torus is initially threaded by a weak azimuthal magnetic field. We found that mass accretion rate and the mass outflow rate strongly depend on the temperature of the initial torus. The ratio of the average Maxwell stress generated by the magneto-rotational instability (MRI) to gas pressure is alpha ~0.05 in the hot torus and alpha ~ 0.01 in the cool torus. In the cool model, a constant angular momentum inner torus is formed around 4-8rs. This inner torus deforms itself from a circle to a crescent quasi-periodically. During this deformation, the mass accretion rate, the magnetic energy and the Maxwell stress increase. As the magnetic energy is released, the inner torus returns to a circular shape and starts the next cycle. Power spectral density (PSD) of the time variation of the mass accretion rate in the cool model has a low frequency peak around 10Hz when we assumed a 10 solar mass black hole. The PSD of the hot model is flat in 1-30Hz. The slope of the PSD in the cool model is steeper than that in the hot model in 30-100Hz. The mass outflow rate in the low temperature model also shows quasi-periodic oscillation. Intermittent outflows are created in both models. The outflow speed is $0.01c - 0.05c$.
description: 22 pages, 17 figures, accepted for publication in PASJ (PASJ,60,pp.613-626). Replaced to high resolution version
Boundary instability of a two-dimensional plasma
Creators: name: Dyakonov, M. I.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: It was shown previously that the current-carrying state of a Field Effect Transistor with asymmetric source and drain boundary conditions may become unstable against spontaneous generation of plasma waves [1]. By extending the analysis to the two-dimensional case we find that the dominant instability modes correspond to waves propagating in the direction perpendicular to the current and localized near the boundaries. This new type of instability should result in plasma turbulency with a broad frequency spectrum. More generally, it is shown that a similar instability might exist, when a strong enough current goes through a single boundary between the gated and ungated regions.
description: 5 pages, 4 figures
A modified bond model for describing isotropic linear elastic material behaviour with the particle method
Creators: name: Venkateswaran, Rahav Gowtham
name: Kowalsky, Ursula
name: Dinkler, Dieter
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computational Engineering, Finance, and Science (cs.CE)
subject: FOS: Computer and information sciences

description: Particle based methods such as the Discrete Element Method and the Lattice Spring Method may be used for describing the behaviour of isotropic linear elastic materials. However, the common bond models employed to describe the interaction between particles restrict the range of Poisson's ratio that can be represented. In this paper, to overcome the restriction, a modified bond model that includes the coupling of shear strain energy of neighbouring bonds is proposed. The coupling is described by a multi-bond term that enables the model to distinguish between shear deformations and rigid-body rotations. The positive definiteness of the strain energy function of the modified bond model is verified. To validate the model, uniaxial tension, pure shear, pure bending and cantilever bending tests are performed. Comparison of the particle displacements with continuum mechanics solution demonstrates the ability of the model to describe the behaviour of isotropic linear elastic material for values of Poisson's ratio in the range $0 \leq ν< 0.5$.
BRST operators for W algebras
Creators: name: Isaev, A. P.
name: Krivonos, S. O.
name: Ogievetsky, O. V.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Quantum Algebra (math.QA)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: The study of quantum Lie algebras motivates a use of non-canonical ghosts and anti-ghosts for non-linear algebras, like W-algebras. This leads, for the W_3 and W_3^(2) algebras, to the BRST operator having the conventional cubic form.
description: 15 pages, revised version, to appear in J. Math. Phys
Elicitation of causatives
Creators: name: Parker, Verdena
name: Newbold, Lindsey
name: Spence, Justin
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2022
Subjects: subject: hup

description: Audio file VP-300811-06: elicitation of causatives (especially verbs based on the stem -chwe:/-chwe'n)
Two-pion exchange NN potential from Lorentz-invariant $χ$EFT
Creators: name: Higa, Renato
name: Robilotta, Manoel R.
name: da Rocha, Carlos A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We outline the progress made in the past five years by the São Paulo group in the development of a two-pion exchange nucleon-nucleon potential within a Lorentz-invariant framework of (baryon) chiral perturbation theory.
description: 5 pages, Talk given at the 18th International IUPAP Conference on Few-Body Problems in Physics, August 21-26 2006, Santos, Sao Paulo, Brazil
In vivo endoscopic autofluorescence microspectro-imaging of bronchi and alveoli
Creators: name: Bourg-Heckly, G.
name: Thiberville, L.
name: Vever-Bizet, C.
name: Viellerobe, B.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Medical Physics (physics.med-ph)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Fibered confocal fluorescence microscopy (FCFM) is a new technique that can be used during a bronchoscopy to analyze the nature of the human bronchial and alveolar mucosa fluorescence microstructure. An endoscopic fibered confocal fluorescence microscopy system with spectroscopic analysis capability was developed allowing real-time, simultaneous images and emission spectra acquisition at 488 nm excitation using a flexible miniprobe that could be introduced into small airways. This flexible 1.4 mm miniprobe can be introduced into the working channel of a flexible endoscope and gently advanced through the bronchial tree to the alveoli. FCFM in conjunction with bronchoscopy is able to image the in vivo autofluorescence structure of the bronchial mucosae but also the alveolar respiratory network outside of the usual field of view. Microscopic and spectral analysis showed that the signal mainly originates from the elastin component of the bronchial subepithelial layer. In non smokers, the system images the elastin backbone of the aveoli. In active smokers, a strong autofluorescence signal appears from alveolar macrophages. The FCFM technique appears promising for in vivo exploration of the bronchial and alveolar extracellular matrix.
Power corrections in a transverse-momentum cut for vector-boson production at NNLO: the $qg$-initiated real-virtual contribution
Creators: name: Oleari, Carlo
name: Rocco, Marco
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We consider the production of a vector boson ($Z$, $W^\pm$ or $γ^*$) at next-to-next-to-leading order in the strong coupling constant $α_{\rm S}$. We impose a transverse-momentum cutoff, $q_{\rm T}^{\rm cut}$, on the vector boson produced in the $qg$-initiated channel. We then compute the power corrections in the cutoff, up to the second power, of the real-virtual interference contribution to the cumulative cross section at order $α_{\rm S}^2$. Other terms with the same kinematics, originating from the subtraction method applied to the double-real contribution, have been also considered. The knowledge of such power corrections is a required ingredient in order to reduce the dependence on the transverse-momentum cutoff of the QCD cross sections at next-to-next-to-leading order, when the $q_{\rm T}$-subtraction method is applied. In addition, the study of the dependence of the cross section on $q_{\rm T}^{\rm cut}$ allows as well for an understanding of its behaviour in the small transverse-momentum limit, giving hints on the structure at all orders in $α_{\rm S}$ and on the identification of universal patterns. Our result are presented in an analytic form, using the process-independent procedure described in a previous paper for the calculation of the all-order power corrections in $q_{\rm T}^{\rm cut}$.
description: 28 pages. arXiv admin note: text overlap with arXiv:1906.09044
Finding unstable periodic orbits: a hybrid approach with polynomial optimization
Creators: name: Lakshmi, Mayur
name: Fantuzzi, Giovanni
name: Chernyshenko, Sergei
name: Lasagna, Davide
Publisher: name: arXiv
Year: 2021
Subjects: subject: Dynamical Systems (math.DS)
subject: Optimization and Control (math.OC)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: We present a novel method to compute unstable periodic orbits (UPOs) that optimize the infinite-time average of a given quantity for polynomial ODE systems. The UPO search procedure relies on polynomial optimization to construct nonnegative polynomials whose sublevel sets approximately localize parts of the optimal UPO, and that can be used to implement a simple yet effective control strategy to reduce the UPO's instability. Precisely, we construct a family of controlled ODE systems parameterized by a scalar $k$ such that the original ODE system is recovered for $k = 0$, and such that the optimal orbit is less unstable, or even stabilized, for $k>0$. Periodic orbits for the controlled system can be more easily converged with traditional methods and numerical continuation in $k$ allows one to recover optimal UPOs for the original system. The effectiveness of this approach is illustrated on three low-dimensional ODE systems with chaotic dynamics.
description: 17 pages, 6 figures
Transcriptional Interactions During Smallpox Infection and Identification of Early Infection Biomarkers
Creators: name: Valdivia-Granda, Willy A.
name: Kann, Maricel G.
name: Malaga, Jose
Publisher: name: arXiv
Year: 2006
Subjects: subject: Molecular Networks (q-bio.MN)
subject: Genomics (q-bio.GN)
subject: FOS: Biological sciences

description: Smallpox is a deadly disease that can be intentionally reintroduced into the human population as a bioweapon. While host gene expression microarray profiling can be used to detect infection, the analysis of this information using unsupervised and supervised classification techniques can produce contradictory results. Here, we present a novel computational approach to incorporate molecular genome annotation features that are key for identifying early infection biomarkers (EIB). Our analysis identified 58 EIBs expressed in peripheral blood mononuclear cells (PBMCs) collected from 21 cynomolgus macaques (Macaca fascicularis) infected with two variola strains via aerosol and intravenous exposure. The level of expression of these EIBs was correlated with disease progression and severity. No overlap between the EIBs co-expression and protein interaction data reported in public databases was found. This suggests that a pathogen-specific re-organization of the gene expression and protein interaction networks occurs during infection. To identify potential genome-wide protein interactions between variola and humans, we performed a protein domain analysis of all smallpox and human proteins. We found that only 55 of the 161 protein domains in smallpox are also present in the human genome. These co-occurring domains are mostly represented in proteins involved in blood coagulation, complement activation, angiogenesis, inflammation, and hormone transport. Several of these proteins are within the EIBs category and suggest potential new targets for the development of therapeutic countermeasures.
Mykophagophrys terricola Foissner 1995
Creators: name: Durán-Ramírez, Carlos Alberto
name: Dias, Roberto Júnio Pedroso
name: Estrada, Rosaura Mayén-
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Chromista
Ciliophora
Colpodea
Grossglockneriida
Grossglockneriidae
Mykophagophrys
Mykophagophrys terricola

description: Mykophagophrys terricola (Foissner, 1985) Foissner, 1995
Distribution. MEXICO: Santuario del Bosque de Niebla, near Xalapa (Durán-Ramírez et al. 2015), (Th). VEN-EZUELA: South margin of the Henri Pittier National Park, Biological Station Rancho Grande (Foissner 2016); North border of the Henri Pittier National Park, surroundings of the village of Choroni (Foissner 2016), (Ts).
description: Published as part of Durán-Ramírez, Carlos Alberto, Dias, Roberto Júnio Pedroso & Estrada, Rosaura Mayén-, 2020, Checklist of ciliates (Alveolata: Ciliophora) that inhabit in bromeliads from the Neotropical Region, pp. 1-36 in Zootaxa 4895 (1) on page 24, DOI: 10.11646/zootaxa.4895.1.1, http://zenodo.org/record/4321437
Quantifying Ionospheric Effects on Global 21-cm Observations
Creators: name: Shen, Emma
name: Anstey, Dominic
name: Acedo, Eloy de Lera
name: Fialkov, Anastasia
name: Handley, Will
Publisher: name: arXiv
Year: 2020
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We modelled the two major layer of Earth's ionosphere, the F-layer and the D-layer, by a simplified spatial model with temporal variance to study the chromatic ionospheric effects on global 21-cm observations. From the analyses, we found that the magnitude of the ionospheric disruptions due to ionospheric refraction and absorption can be greater than the expected global 21-cm signal, and the variation of its magnitude can differ, depending on the ionospheric conditions. Within the parameter space adopted in the model, the shape of the global 21-cm signal is distorted after propagating through the ionosphere, while its amplitude is weakened. It is observed that the ionospheric effects do not cancel out over time, and thus should be accounted for in the foreground calibration at each timestep to account for the chromaticity introduced by the ionosphere.
description: 11 pages, 13 figures, 4 tables
Surface-induced linear magnetoresistance in antiferromagnetic topological insulator MnBi2Te4
Creators: name: Lei, X.
name: Zhou, L.
name: Hao, Z. Y.
name: Ma, X. Z.
name: Ma, C.
name: Wang, Y. Q.
name: Chen, P. B.
name: Ye, B. C.
name: Wang, L.
name: Ye, F.
name: Wang, J. N.
name: Mei, J. W.
name: He, H. T.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Through a thorough magneto-transport study of antiferromagnetic topological insulator MnBi2Te4 (MBT) thick films, a positive linear magnetoresistance (LMR) with a two-dimensional (2D) character is found in high perpendicular magnetic fields and temperatures up to at least 260 K. The nonlinear Hall effect further reveals the existence of high-mobility surface states in addition to the bulk states in MBT. We ascribe the 2D LMR to the high-mobility surface states of MBT, thus unveiling a transport signature of surface states in thick MBT films. A suppression of LMR near the Neel temperature of MBT is also noticed, which might suggest the gap opening of surface states due to the paramagnetic-antiferromagnetic phase transition of MBT. Besides these, the failure of the disorder and quantum LMR model in explaining the observed LMR indicates new physics must be invoked to understand this phenomenon.
description: 5 figures
title: Measurement of particle multiplicity and energy ﬂow in pp collisions at 13 TeV with the LHCb detector
Creators: name: Dreimanis, K
Publisher: name: University of Liverpool Repository
Year: 2017

description: The LHC is the world’s largest and highest-energy particle collider. The LHCb experiment is one of four main experiments at the LHC. In July/August 2015, at the beginning of Run-II of the collider, the LHCb detector collected no-bias data during the so-called ‘Early Measurements’ low intensity data taking run. The analysis described in this thesis, the measurement of particle multiplicity and energy ﬂow in proton-proton collisions at a centre-of-mass energy of √s = 13 TeV, uses this dataset. This analysis is aimed at improving our understanding of the hadron-hadron interaction process in full and, more speciﬁcally, our knowledge of the contributions of the underlying event and multi-parton interactions to the observable ﬁnal states. The data sample is split into the charged and neutral components and then further segregated into four event classes - inclusive minimum-bias, hard scattering, diﬀractive enriched and non-diﬀractive enriched. The measurement is carried out over a 2D (e×η) space within the ﬁducial acceptance of 2.0 < p < 1000.0 GeV/c and 2.0 < η < 5.0 and a full detector unfolding is performed. The results are presented as 1D multiplicity and energy ﬂow distributions as a function of η and compared to four sets of theoretical predictions - Pythia 8 LHCb, Pythia 8 Monash 2013, EPOS LHC and Sibyll 2.1. It is found that the LHCb tune of the Pythia 8.212 generator is able to describe the data the best, whilst the worst performing set of theoretical predictions is found to be EPOS LHC. Overall, the description of the inclusive minimum-bias and non-diﬀractive enrichedeventclassesby Pythia 8.212LHCbforboththemultiplicityandenergyﬂowis found to match the data well, while the theoretical predictions overestimate the charged component’s multiplicity for the diﬀractive enriched event class and underestimate the neutral multiplicity for the neutral hard scattering event class.
GPrioSwap : Towards a Swapping Policy for GPUs
Creators: name: Kehne, Jens
name: Metter, Jonathan
name: Merkel, Martin
name: Hillenbrand, Marius
name: Gottschlag, Mathias
name: Bellosa, Frank
Publisher: name: Association for Computing Machinery (ACM)
Year: 2017
Subjects: Virtualization
Memory Overcommitment
Oversubscription
Swapping
Profiling
GPU

description: Over the last few years, Graphics Processing Units (GPUs) have become popular in computing, and have found their way into a number of cloud platforms. However, integrating a GPU into a cloud environment requires the cloud provider to efficiently virtualize the GPU. While several research projects have addressed this challenge in the past, few of these projects attempt to properly enable sharing of GPU memory between multiple clients: To date, GPUswap is the only project that enables sharing of GPU memory without inducing unnecessary application overhead, while maintaining both fairness and high utilization of GPU memory. However, GPUswap includes only a rudimentary swapping policy, and therefore induces a rather large application overhead. In this paper, we work towards a practicable swapping policy for GPUs. To that end, we analyze the behavior of various GPU applications to determine their memory access patterns. Based on our insights about these patterns, we derive a swapping policy that includes a developer-assigned priority for each GPU buffer in its swapping decisions. Experiments with our prototype implementation show that a swapping policy based on buffer priorities can significantly reduce the swapping overhead.
A First Approximation for Quantization of Singular Spaces
Creators: name: Poncin, Norbert
name: Radoux, Fabian
name: Wolak, Robert
Publisher: name: arXiv
Year: 2008
Subjects: subject: Differential Geometry (math.DG)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 53D50; 53C12; 53B10; 53D20

description: Many mathematical models of physical phenomena that have been proposed in recent years require more general spaces than manifolds. When taking into account the symmetry group of the model, we get a reduced model on the (singular) orbit space of the symmetry group action. We investigate quantization of singular spaces obtained as leaf closure spaces of regular Riemannian foliations on compact manifolds. These contain the orbit spaces of compact group actions and orbifolds. Our method uses foliation theory as a desingularization technique for such singular spaces. A quantization procedure on the orbit space of the symmetry group - that commutes with reduction - can be obtained from constructions which combine different geometries associated with foliations and new techniques originated in Equivariant Quantization. The present paper contains the first of two steps needed to achieve these just detailed goals.
description: 30 pages
The limits to state failure : armed non-state actors and the maintenance of social order in Afghanistan and Papua New Guinea
Creators: name: Drummond, Bruce John
Publisher: name: The Australian National University
Year: 2011
Subjects: subject: DU740.8.D78 2011
subject: Leadership Papua New Guinea
subject: Leadership Afghanistan
subject: Failed states
subject: Papua New Guinea Politics and government
subject: Afghanistan Politics and government

description: This thesis is an examination of the role of armed sub-state actors in situations where the state is weak or failing. There is a substantial body of literature on state failure and on the role of warlords. For the most part there are considerable problems with the definitions of both concepts and also strongly negative assumptions about the consequences of state failure and the role of warlords. It is suggested in this study that warlordism can be a type of transitional leadership for traditional societies, especially those where institutional structures are weak or even non-existent. For these traditional societies a transitional leader may emerge when the traditional community is threatened, a figure that might otherwise be described as a warlord. This thesis proposes to these two hypotheses. First, this thesis contends that rather than warlords being solely the product of state failure or collapse, those armed sub-state actors so labelled as "warlords" are also the result of the disruption to traditional society caused by the expansion of state power. The second hypothesis of this research project is that the focus on the apparent institutional weaknesses of the central government, and thus the mechanisms judged necessary for the functioning of the state, particularly in the delivery of essential public goods, overlooks other more enduring localised sources of legitimacy and control within countries with otherwise weak or non-existent national governmental institutions. The case studies analysing the types of warlordism in Papua New Guinea and Afghanistan highlight how state disruption distorted traditional elite structures leading to warlordism emerging quite distinctive forms in both countries. An assessment of the conduct of warlordism in both cases studies illustrates how these warlords have taken on on part of the traditional habits of leadership in their societies. The distortions attributable to the state have altered their behaviour, though, to the extent that the inclination and ability to provide public goods is severely constrained.
A phenomenological study of the work experiences of aging adults with intellectual disabilities and their perceptions of retirement
Creators: name: Nakamura, Jean Elizabeth
Publisher: name: University of British Columbia
Year: 2009

description: With the deinstitutionalization of people with intellectual disabilities, they are not only living and working in their communities, they are living longer and reaching retirement age. It is now understood and accepted that old age is a distinct stage of life experienced by people with intellectual disabilities. To understand the needs of this population as they retire, this study examined the work experiences of five older adults with intellectual disabilities and their perceptions of life without work (retirement). The purpose of the study was to gain an understanding of the role and meaning of work in their lives, and their vision of the future. Five participants over the age of fifty were interviewed using a phenomenological methodology. This research method allowed the participants to speak directly of their experience and made no a priori assumptions about those experiences. The findings of the study concluded that work played a very important role in the lives of the five participants and indicated they had no desire to give up work completely should they reach retirement age. It was anticipated the insight gained from this study would assist in providing valuable information needed to develop services and programs to meet the needs of this growing population.
LoGA : Low-Overhead GPU Accounting Using Events
Creators: name: Kehne, Jens
name: Spassov, Stanislav
name: Hillenbrand, Marius
name: Rittinghaus, Marc
name: Bellosa, Frank
Publisher: name: Association for Computing Machinery (ACM)
Year: 2017
Subjects: Accounting
event-based
scheduling
GPU

description: Over the last few years, GPUs have become common in computing. However, current GPUs are not designed for a shared environment like a cloud, creating a number of challenges whenever a GPU must be multiplexed between multiple users. In particular, the round-robin scheduling used by today's GPUs does not distribute the available GPU computation time fairly among applications. Most of the previous work addressing this problem resorted to scheduling all GPU computation in software, which induces high overhead. While there is a GPU scheduler called NEON which reduces the scheduling overhead compared to previous work, NEON's accounting mechanism frequently disables GPU access for all but one application, resulting in considerable overhead if that application does not saturate the GPU by itself. In this paper, we present LoGA, a novel accounting mechanism for GPU computation time. LoGA monitors the GPU's state to detect GPU-internal context switches, and infers the amount of GPU computation time consumed by each process from the time between these context switches. This method allows LoGA to measure GPU computation time consumed by applications while keeping all applications running concurrently. As a result, LoGA achieves a lower accounting overhead than previous work, especially for applications that do not saturate the GPU by themselves. We have developed a prototype which combines LoGA with the pre-existing NEON scheduler. Experiments with that prototype have shown that LoGA induces no accounting overhead while still delivering accurate measurements of applications' consumed GPU computation time.
Transcription of "Coyote, Little Owl, and Two-Neck"
Creators: name: Parker, Verdena
name: Newbold, Lindsey
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2022
Subjects: subject: hup

description: Audio file VP-300811-07: Transcription of the story of Coyote, Little Owl, and the giant Two-Neck (file VP-221006-01), from 12:22 to 19:38.
Damage Spreading at the Corner Filling Transition in the two-dimensional Ising Model
Creators: name: Puzzo, M. Leticia Rubio
name: Albano, Ezequiel V.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The propagation of damage on the square Ising lattice with a corner geometry is studied by means of Monte Carlo simulations. It is found that, just at $T=T_f (h)$ (critical temperature of the filling transition) the damage initially propagates along the interface of the competing domains, according to a power law given by $D(t) \propto t^η$. The value obtained for the dynamic exponent ($η^{*} = 0.89(1)$) is in agreement with that corresponding to the wetting transition in the slit geometry (Abraham Model) given by $η^{WT} = 0.91(1)$. However, for later times the propagation crosses to a new regime such as $η^{**} = 0.40 \pm 0.02$, which is due to the propagation of the damage into the bulk of the magnetic domains. This result can be understood due to the constraints imposed to the propagation of damage by the corner geometry of the system that cause healing at the corners where the interface is attached.
description: 22 pages, including figures Submited to J. Phys.: Condens. Matter
Precise Calibration of the One-Loop Trispectrum in the Effective Field Theory of Large Scale Structure
Creators: name: Steele, Theodore
name: Baldauf, Tobias
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The Large-Scale Structure (LSS) of the universe has the potential to provide decisive answers to the remaining open questions in cosmology. Early attempts at modelling it analytically focused on using perturbation theory. However, small-scale effects introduced by gravitational collapse cannot be described perturbatively and this failure of perturbation theory is reflected even on the largest scales. The Effective Field Theory of Large Scale Structure (EFTofLSS) has emerged as a consistent method for describing LSS on large scales by introducing counterterms that account for the effects of small-scale dynamics. So far studies of the EFT have mostly focused on the two and three point functions with little attention devoted to the four point function or trispectrum. The trispectrum probes cubic interactions arising from non-linear clustering, biasing, and primordial non-Gaussianities, and constitutes a key element of the covariance matrix of the power spectrum. In this paper, we present explicit calibrations of the EFT counterterms for the one-loop trispectrum. Specifically, we find clear evidence for non-zero EFT corrections. We define two one-parameter ansätze for the counterterm of the one-loop propagator and show that they provide a good correction to the residual at scales below k~0.07 h/Mpc. We then take the amplitudes of the linear and quadratic counterkernels calculated in our previous paper on the bispectrum and use them in the remaining counterterms, establishing consistency of the counterterms in the two, three and four point function. We also show that the commonly used EdS approximation for the growth of the density fields leads to errors that are of the same magnitude as loop corrections to the trispectrum on large scales.
description: 32 pages, 21 figures, comments welcome
Transcription of a description of the cemetery at Xowung-q'it
Creators: name: Parker, Verdena
name: Spence, Justin
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2022
Subjects: subject: hup

description: Audio file VP-300811-05: Transcription of a description of the old family cemetery at Xowung-q'it (file VP-230711-04), from 1:03 to 3:09.