cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Completely positive quantum stochastic convolution cocycles and their dilations
Creators: name: Skalski, Adam
Publisher: name: arXiv
Year: 2006
Subjects: subject: Operator Algebras (math.OA)
subject: Probability (math.PR)
subject: FOS: Mathematics
subject: Primary 81S25; Secondary 16W30

description: Stochastic generators of completely positive and contractive quantum stochastic convolution cocycles on a C*-hyperbialgebra are characterised. The characterisation is used to obtain dilations and stochastic forms of Stinespring decomposition for completely positive convolution cocycles on a C*-bialgebra.
description: 20 pages; to appear in Mathematical Proceedings of the Cambridge Philosophical Society (2007)
Failure analysis of blast loaded ductile beam
Creators: name: Luo, Qing
Publisher: name: University of British Columbia
Year: 2009

description: A failure analysis procedure based on the elastic-plastic finite element analysis of the higher order beam is presented to predict the mode II and III failure of impulsively loaded ductile clamped beams. The variational equation of motion of the problem is first obtained by using the principle of virtual work and the Total Lagrangian Approach together with the kinematics of the higher order beam theory and the nonlinear strain-displacement relation. The Finite Element Method is employed to discretize the beam spatially initiating the numerical solution procedure. The constitutive model considers elastic-plastic isotropic strain hardening by von Mises yield criterion and associated flow rule and strain rate sensitivity by Cowper-Symonds relationship. Equations of motion are integrated by central difference method in the time domain. Based on the finite element simulation, two failure criteria are proposed. In the interaction failure criteria, contributions from tensile tearing and transverse shearing to the damage of the beam are considered by including tensile strain ratio and shear stress ratio in the criteria. Both linear and quadratic models are investigated. The beam is modelled as an elastic-plastic beam with a plastic hinge at each support to calculate the total strain at the support. The shear stress comes either from the wall reaction obtained from equilibrium or directly from the finite element analysis of the higher order beam theory. In the sectional plastic work density criterion, the beam is assumed not to fail until the sectional plastic work density exceeds the critical value. Post failure analysis is also included to take account of the residual energy of the beam at failure. Numerical simulations have been carried out for the experiments of blast loaded beams. Comparison with the experimental results suggests the quadratic interaction criteria is suitable for this type of analysis.
A Multi-Band Forced-Photometry Catalog in the ELAIS-S1 Field
Creators: name: Zou, Fan
name: Brandt, W. N.
name: Lacy, Mark
name: Ni, Qingling
name: Nyland, Kristina
name: Yang, Guang
name: Bauer, Franz E.
name: Covone, Giovanni
name: Grado, Aniello
name: Napolitano, Nicola R.
name: Paolillo, Maurizio
name: Radovich, Mario
name: Spavone, Marilena
name: Vaccari, Mattia
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The ELAIS-S1 field will be an LSST Deep Drilling field, and it also has extensive multiwavelength coverage. To improve the utility of the existing data, we use The Tractor to perform forced-photometry measurements in this field. We compile data in 16 bands from the DeepDrill, VIDEO, DES, ESIS, and VOICE surveys. Using a priori information from the high-resolution fiducial images in VIDEO, we model the images in other bands and generate a forced-photometry catalog. This technique enables consistency throughout different surveys, deblends sources from low-resolution images, extends photometric measurements to a fainter magnitude regime, and improves photometric-redshift estimates. Our catalog contains over 0.8 million sources covering a 3.4 deg2 area in the VIDEO footprint and is available at 10.5281/zenodo.4540178.
description: 8 pages, 4 figures
Alati za pripremu plana upravljanja istraživačkim podacima
Creators: name: Vučkovac, Obrad
Publisher: name: Zenodo
Year: 2021
Subjects: DMP
RDM
Open Access
Open Data
FAIR
Data management
DMPOnline
DMPTool
Argos
DSW

description: Presentation held during Open Science Days in Serbia III. The aim of this presentation was to introduce all interested parties with the results and planned activities of EOSC Co-creation activity titled "Boosting EOSC readiness: Creating a scalable model for capacity building in RDM" at the University of Belgrade. More specifically, Data Management Plan (DMP) requirements for The Science Fund of the Republic of Serbia and other programs (e.g., Horizon 2020). Among four tools mentioned: Argos, DMPTool, DMPOnline, and Data Stewardship Wizard; Argos and DMPOnline were presented more in-detail for DMP creation during the presentation.
description: Video recording for this presentation is available at http://open.ac.rs/don2020.
Generic Gravitational Wave Signals from the Collapse of Rotating Stellar Cores
Creators: name: Dimmelmeier, Harald
name: Ott, Christian D.
name: Janka, Hans-Thomas
name: Marek, Andreas
name: Mueller, Ewald
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We perform general relativistic simulations of stellar core collapse to a proto-neutron star, using a microphysical equation of state as well as an approximate description of deleptonization. We show that for a wide variety of rotation rates and profiles the gravitational wave burst signals from the core bounce are of a generic type, known as Type I in the literature. In our systematic study, using both general relativity and Newtonian gravity, we identify and individually quantify the micro- and macrophysical mechanisms leading to this result, i.e. the effects of rotation, the equation of state, and deleptonization. Such a generic type of signal templates will likely facilitate a more efficient search in current and future gravitational wave detectors of both interferometric and resonant type.
description: 4 pages, 3 figures; minor modifications and additions
Charged Higgs Boson Effects in the Production and Decay of a Heavy Majorana Neutrino at the LHC
Creators: name: Bar-Shalom, Shaouly
name: Eilam, Gad
name: Han, Tao
name: Soni, Amarjit
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We consider a new interaction between a heavy Majorana neutrino (N) and a charged Higgs boson (H+) and show that it can have drastic implications on lepton number violating (LNV) signal of same-sign dileptons at the LHC. The LNV signal of heavy Majorana neutrinos previously considered at the LHC, pp -> l+ N -> l+ l+ W-, may be overwhelmed by pp -> l+ N -> l+ l+ H-. With the subsequent decays H- -> b t(bar) or H- -> W- H^0, the heavy Majorana neutrino production leads to the spectacular events of l+ l+ b b(bar) + 2 jets. We also explore the case m_N < m_{H+}, where the decay H+ -> l+ N can become the dominant N-production mechanism at the LHC. In particular, we show that the process g b -> t H- followed by t -> b W+ and H- -> l- N -> l- l- W+ could lead to another type of spectacular events of l- l- b + 4 jets.
description: revtex4, 16 pages, 2 figures
LP 400-22, A very low-mass and high-velocity white dwarf
Creators: name: Kawka, Adela
name: Vennes, Stephane
name: Oswalt, Terry D.
name: Smith, J. Allyn
name: Silvestri, Nicole M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report the identification of LP 400-22 (WD 2234+222) as a very low-mass and high-velocity white dwarf. The ultraviolet GALEX and optical photometric colors and a spectral line analysis of LP 400-22 show this star to have an effective temperature of 11080+/-140 K and a surface gravity of log g = 6.32+/-0.08. Therefore, this is a helium core white dwarf with a mass of 0.17 M_solar. The tangential velocity of this white dwarf is 414+/-43 km/s, making it one of the fastest moving white dwarfs known. We discuss probable evolutionary scenarios for this remarkable object.
description: accepted for publication in ApJ Letters, made minor corrections
Comparison of ion sites and diffusion paths in glasses obtained by molecular dynamics simulations and bond valence analysis
Creators: name: Muller, Christian
name: Zienicke, Egbert
name: Adams, Stefan
name: Habasaki, Junko
name: Maass, Philipp
Publisher: name: arXiv
Year: 2006
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: Based on molecular dynamics simulations of a lithium metasilicate glass we study the potential of bond valence sum calculations to identify sites and diffusion pathways of mobile Li ions in a glassy silicate network. We find that the bond valence method is not well suitable to locate the sites, but allows one to estimate the number of sites. Spatial regions of the glass determined as accessible for the Li ions by the bond valence method can capture up to 90% of the diffusion path. These regions however entail a significant fraction that does not belong to the diffusion path. Because of this low specificity, care must be taken to determine the diffusive motion of particles in amorphous systems based on the bond valence method. The best identification of the diffusion path is achieved by using a modified valence mismatch in the BV analysis that takes into account that a Li ion favors equal partial valences to the neighboring oxygen ions. Using this modified valence mismatch it is possible to replace hard geometric constraints formerly applied in the BV method. Further investigations are necessary to better understand the relation between the complex structure of the host network and the ionic diffusion paths.
description: 16 pages, 10 figures
Flow routing model for upper Indus river (Pakistan)
Creators: name: Hashmi, Danial
Publisher: name: University of British Columbia
Year: 2009

description: For the flow forecasting of the Upper Indus Basin (UIB) Pakistan, it is observed that large quantities of ungauged lateral flows enter many sections of the Indus River system during the monsoon and the snow melt season. The river is steep, flow travel times are short, and the data are currently available only on a mean daily flow basis. There are very few gauging stations and the travel time between them is less than a day, so that standard routing procedures such as the Muskingum method was difficult to apply because of the large amount of ungauged lateral flows entering the main channel. Calibrating the Muskingum model was therefore difficult because of the ungauged lateral flows, and also because the coefficients used in the Muskingum method are a function of routing period and vary considerably when the routing period is less or greater than the travel time. There was a need for a model which could not only route the flows through the Upper Indus reaches but also could link all the sub basins contributing to the Indus flows. The whole UIB is divided into reaches, and a digital computer Link Model is developed which links these reaches and routes the flows through these reaches using the flow routing method developed by Quick and Pipes. The Link Model adds the known lateral flows to the main channel flows and also calculates the ungauged lateral flows if the stream gauging data for the downstream station is known. This Model can easily be interfaced with the UBC Watershed Model, which forecasts the land phase of the flow and the total system of models can be used for flow forecasting of UIB. The routing method adopted is very flexible and easy to calibrate, because the principal feature of the routing method is that the routing coefficients are determined directly from the stage-discharge and area-discharge measurements at the gauging stations, so the method is pre-calibrated before commencing routing, and therefore avoids the problem of accounting for ungauged lateral inflows. The model has been tested on a 400 km segment of the main stem Upper Indus River, which lies above Tarbela dam i.e, between Besham Qila and Kachura gauging stations Fig (5.1). and was found satisfactory. Given the required data the Model can be used in any similar system.
Learning Mesh Representations via Binary Space Partitioning Tree Networks
Creators: name: Chen, Zhiqin
name: Tagliasacchi, Andrea
name: Zhang, Hao
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Graphics (cs.GR)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Polygonal meshes are ubiquitous, but have only played a relatively minor role in the deep learning revolution. State-of-the-art neural generative models for 3D shapes learn implicit functions and generate meshes via expensive iso-surfacing. We overcome these challenges by employing a classical spatial data structure from computer graphics, Binary Space Partitioning (BSP), to facilitate 3D learning. The core operation of BSP involves recursive subdivision of 3D space to obtain convex sets. By exploiting this property, we devise BSP-Net, a network that learns to represent a 3D shape via convex decomposition without supervision. The network is trained to reconstruct a shape using a set of convexes obtained from a BSP-tree built over a set of planes, where the planes and convexes are both defined by learned network weights. BSP-Net directly outputs polygonal meshes from the inferred convexes. The generated meshes are watertight, compact (i.e., low-poly), and well suited to represent sharp geometry. We show that the reconstruction quality by BSP-Net is competitive with those from state-of-the-art methods while using much fewer primitives. We also explore variations to BSP-Net including using a more generic decoder for reconstruction, more general primitives than planes, as well as training a generative model with variational auto-encoders. Code is available at https://github.com/czq142857/BSP-NET-original.
description: Accepted to TPAMI. This is the extended journal version of BSP-Net (arXiv:1911.06971) from CVPR 2020
Additional file 18 of A cis-regulatory element promoting increased transcription at low temperature in cultured ectothermic Drosophila cells
Creators: name: Bai, Yu
name: Caussinus, Emmanuel
name: Leo, Stefano
name: Bosshardt, Fritz
name: Myachina, Faina
name: Rot, Gregor
name: Robinson, Mark D.
name: Lehner, Christian F.
Publisher: name: figshare
Year: 2021
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 18: Fig. S9. Assay for temperature-dependent enhancer activity with candidate CREs. (A) Table summarizing location and activity of candidate CREs analyzed after RMCE with SR9rg cells. (B) Data for the analyzed candidate CREs. Candidate CREs (designation in bold on the left side) were selected based on data obtained by ATAC-Seq (top three browser tracks) and 3′ RNA-Seq (bottom three browser tracks). Grey shading represents the region of the analyzed DNA fragment. Green arrowheads indicate the direction of transcription of the proximal gene. Scatter plots on the right side present green (x axis) and red (y axis) fluorescence intensities as determined by flow cytometry with SR9rg cells after RMCE and incubation at the indicated temperatures.
Perturbative and non-perturbative QCD
Creators: name: Maxwell, C. J.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In these lectures we give a concise introduction to the ideas of renormalon calculus in QED and QCD. We focus in particular on the example of the Adler D function of vacuum polarization, and on relations between perturbative renormalon ambiguities and corresponding non-perturbative Operator Product Expansion (OPE) ambiguities. Recent work on infrared freezing of Euclidean observables is also discussed.
description: 14 pages, 7 figures. Lectures presented at the IPM-LPH06 School and Conference, Tehran, Iran, May 2006
QCD Sum Rule Study of the Masses of Light Tetraquark Scalar Mesons
Creators: name: Chen, Hua-Xing
name: Hosaka, Atsushi
name: Zhu, Shi-Lin
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We study the low-lying scalar mesons of light u, d, s flavors in the QCD sum rule. Having all possible combinations of tetraquark currents in the local form, QCD sum rule analysis has been carefully performed. We found that using the appropriate tetraquark currents, the masses of sigma, kappa, f_0 and a_0 mesons appear in the region of 0.6 -- 1 GeV with the expected ordering. The results are compared with that of the conventional \bar{q} q currents, where the masses are considerably larger.
description: 4 pages, 2 figures; reference added, minor corrections; version to appear in Physics Letters B
Wound opening in a thin incompressible viscoelastic tissue
Creators: name: Carvalho, G. M.
name: Araújo, N. A. M.
name: Patrício, P.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We develop a model to investigate analytically and numerically the mechanics of wound opening made in a viscoelastic, isotropic, homogeneous, and incompressive thin tissue. This process occurs just immediately after the wound infliction. Before any active biological action has taken place, the tissue relaxes, and the wound opens mostly due to the initial homeostatic tension of the tissue, its elastic and viscous properties, and the existing friction between the tissue and its substrate. We find that for a circular wound the regimes of deformation are defined by a single adimensional parameter $λ$, which characterizes the relative importance of viscosity over friction.
description: 7 pages, 4 figures
Lattice construction of exotic invertible topological phases
Creators: name: Kobayashi, Ryohei
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this paper, we provide state sum path integral definitions of exotic invertible topological phases proposed in the recent paper by Hsin, Ji, and Jian. The exotic phase has time reversal ($T$) symmetry, and depends on a choice of the spacetime structure called the Wu structure. The exotic phase cannot be captured by the classification of any bosonic or fermionic topological phases, and thus gives a novel class of invertible topological phases. When the $T$ symmetry defect admits a spin structure, our construction reduces to a sort of the decorated domain wall construction, in terms of a bosonic theory with $T$ symmetry defects decorated with a fermionic phase that depends on a spin structure of the $T$ symmetry defect. By utilizing our path integral, we propose a lattice construction for the exotic phase that generates the $\mathbb{Z}_8$ classification of the (3+1)d invertible phase based on the Wu structure. This generalizes the $\mathbb{Z}_8$ classification of the $T$-symmetric (1+1)d topological superconductor proposed by Fidkowski and Kitaev. On oriented spacetime, this (3+1)d invertible phase with a specific choice of Wu structure reduces to a bosonic Crane-Yetter TQFT which has a topological ordered state with a semion on its boundary. Moreover, we propose a subclass of $G$-SPT phases based on the Wu structure labeled by a pair of cohomological data in generic spacetime dimensions. This generalizes the Gu-Wen subclass of fermionic SPT phases.
description: 30 pages, 7 figures, typos corrected, minor revision made in appendix A, references added
The Quantum Mellin transform
Creators: name: Twamley, J.
name: Milburn, G. J.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We uncover a new type of unitary operation for quantum mechanics on the half-line which yields a transformation to ``Hyperbolic phase space''. We show that this new unitary change of basis from the position x on the half line to the Hyperbolic momentum $p_η$, transforms the wavefunction via a Mellin transform on to the critial line $s=1/2-ip_η$. We utilise this new transform to find quantum wavefunctions whose Hyperbolic momentum representation approximate a class of higher transcendental functions, and in particular, approximate the Riemann Zeta function. We finally give possible physical realisations to perform an indirect measurement of the Hyperbolic momentum of a quantum system on the half-line.
description: 23 pages, 6 Figures
Additional file 1: of QTL mapping for resistance to and tolerance for the rice root-knot nematode, Meloidogyne graminicola
Creators: name: Galeng-Lawilao, Judith
name: Kumar, Arvind
name: De Waele, Dirk
Publisher: name: figshare
Year: 2018
Subjects: subject: Space Science
subject: Genetics
subject: FOS: Biological sciences
subject: Biotechnology
subject: Evolutionary Biology
subject: Environmental Sciences not elsewhere classified
subject: Chemical Sciences not elsewhere classified
subject: Ecology
subject: Biological Sciences not elsewhere classified
subject: Infectious Diseases
subject: FOS: Health sciences
subject: Plant Biology
subject: Virology

description: Table S1. QTLs, yield and yield reduction of selected resistant and tolerant genotypes in two seasons. (DOCX 29 kb)
Computing Characteristic Polynomials of p-Curvatures in Average Polynomial Time
Creators: name: Pagès, Raphaël
Publisher: name: arXiv
Year: 2021
Subjects: subject: Symbolic Computation (cs.SC)
subject: Functional Analysis (math.FA)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: We design a fast algorithm that computes, for a given linear differential operator with coefficients in $Z[x ]$, all the characteristic polynomials of its p-curvatures, for all primes $p < N$ , in asymptotically quasi-linear bit complexity in N. We discuss implementations and applications of our algorithm. We shall see in particular that the good performances of our algorithm are quickly visible.
Rational 6-cycles under iteration of quadratic polynomials
Creators: name: Stoll, Michael
Publisher: name: arXiv
Year: 2008
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11G30; 11G40; 14G05; 11D41

description: We present a proof, which is conditional on the Birch and Swinnerton-Dyer Conjecture for a specific abelian variety, that there do not exist rational numbers x and c such that x has exact period N = 6 under the iteration x |-> x^2 + c. This extends earlier results by Morton for N = 4 and by Flynn, Poonen and Schaefer for N = 5.
description: 15 pages; this is the version that appeared in print
Combined Iodine- and Sulfur-based Treatments for an Effective Passivation of GeSn Surface
Creators: name: Groell, Léonor
name: Attiaoui, Anis
name: Assali, Simone
name: Moutanabbir, Oussama
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: GeSn alloys are metastable semiconductors that have been proposed as building blocks for silicon-integrated short-wave and mid-wave infrared photonic and sensing platforms. Exploiting these semiconductors requires, however, the control of their epitaxy and their surface chemistry to reduce non-radiative recombination that hinders the efficiency of optoelectronic devices. Herein, we demonstrate that a combined sulfur- and iodine-based treatments yields effective passivation of Ge and Ge0.9Sn0.1 surfaces. X-ray photoemission spectroscopy and in situ spectroscopic ellipsometry measurements were used to investigate the dynamics of surface stability and track the reoxidation mechanisms. Our analysis shows that the largest reduction in oxide after HI treatment, while HF+(NH4)2S results in a lower re-oxidation rate. A combined HI+(NH4)2S treatment preserves the lowest oxide ratio <10 % up to 1 hour of air exposure, while less than half of the initial oxide coverage is reached after 4 hours. These results highlight the potential of S- and I-based treatments in stabilizing the GeSn surface chemistry thus enabling a passivation method that is compatible with materials and device processing.
Explosive Nucleosynthesis from GRB and Hypernova Progenitors: Direct Collapse versus Fallback
Creators: name: Fryer, Christopher L.
name: Young, Patrick A.
name: Hungerford, Aimee L.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The collapsar engine behind long-duration gamma-ray bursts extracts the energy released from the rapid accretion of a collapsing star onto a stellar-massed black hole. In a collapsing star, this black hole can form in two ways: the direct collapse of the stellar core into a black hole and the delayed collapse of a black hole caused by fallback in a weak supernova explosion. In the case of a delayed-collapse black hole, the strong collapsar-driven explosion overtakes the weak supernova explosion before shock breakout, and it is very difficult to distinguish this black hole formation scenario from the direct collapse scenario. However, the delayed-collapse mechanism, with its double explosion, produces explosive nucleosynthetic yields that are very different from the direct collapse scenario. We present 1-dimensional studies of the nucleosynthetic yields from both black hole formation scenarios, deriving differences and trends in their nucleosynthetic yields.
description: 47 pages, submitted to ApJ
CRIL: Continual Robot Imitation Learning via Generative and Prediction Model
Creators: name: Gao, Chongkai
name: Gao, Haichuan
name: Guo, Shangqi
name: Zhang, Tianren
name: Chen, Feng
Publisher: name: arXiv
Year: 2021
Subjects: subject: Robotics (cs.RO)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Imitation learning (IL) algorithms have shown promising results for robots to learn skills from expert demonstrations. However, they need multi-task demonstrations to be provided at once for acquiring diverse skills, which is difficult in real world. In this work we study how to realize continual imitation learning ability that empowers robots to continually learn new tasks one by one, thus reducing the burden of multi-task IL and accelerating the process of new task learning at the same time. We propose a novel trajectory generation model that employs both a generative adversarial network and a dynamics-aware prediction model to generate pseudo trajectories from all learned tasks in the new task learning process. Our experiments on both simulation and real-world manipulation tasks demonstrate the effectiveness of our method.
Transport of a heated granular gas in a washboard potential
Creators: name: Costantini, Giulio
name: Cecconi, Fabio
name: Marini-Bettolo-Marconi, Umberto
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We study numerically the motion of a one dimensional array of Brownian particles in a washboard potential, driven by an external stochastic force and interacting via short range repulsive forces. In particular, we investigate the role of instantaneous elastic and inelastic collisions on the system dynamics and transport. The system displays a locked regime, where particles may move only via activated processes and a running regime where particles drift along the direction of the applied field. By tuning the value of the friction parameter controlling the Brownian motion we explore both the overdamped dynamics and the underdamped dynamics. In the two regimes we considered the mobility and the diffusivity of the system as functions of the tilt and other relevant control parameters such as, coefficient of restitution, particle size and total number of particles. We find that, while in the overdamped regime, the results for the interacting systems present similarities with the known non-interacting case, in the underdamped regime, the inelastic collisions determine a rich variety of behaviors among which is an unexpected enhancement of the inelastic diffusion.
description: RevTex: 9 pages, 10 eps-figures
Additional file 2 of A randomized trial evaluating the safety profile of sugammadex in high surgical risk ASA physical class 3 or 4 participants
Creators: name: Herring, W. Joseph
name: Mukai, Yuki
name: Wang, Aobo
name: Lutkiewicz, Jeannine
name: Lombard, John F.
name: Lin, Li
name: Watkins, Molly
name: Broussard, David M.
name: Blobner, Manfred
Publisher: name: figshare
Year: 2021
Subjects: subject: Space Science
subject: Medicine
subject: Neuroscience
subject: Physiology
subject: FOS: Biological sciences
subject: Pharmacology
subject: Biotechnology
subject: Mental Health
subject: Infectious Diseases
subject: FOS: Health sciences

description: Additional file 2. CONSORT checklist.
Simulating both parity sectors of the Hubbard Model with Tensor Networks
Creators: name: Schneider, Manuel
name: Ostmeyer, Johann
name: Jansen, Karl
name: Luu, Thomas
name: Urbach, Carsten
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computational Physics (physics.comp-ph)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences
subject: J.2

description: Tensor networks are a powerful tool to simulate a variety of different physical models, including those that suffer from the sign problem in Monte Carlo simulations. The Hubbard model on the honeycomb lattice with non-zero chemical potential is one such problem. Our method is based on projected entangled pair states (PEPS) using imaginary time evolution. We demonstrate that it provides accurate estimators for the ground state of the model, including cases where Monte Carlo simulations fail miserably. In particular it shows near to optimal, that is linear, scaling in lattice size. We also present a novel approach to directly simulate the subspace with an odd number of fermions. It allows to independently determine the ground state in both sectors. Without a chemical potential this corresponds to half filling and the lowest energy state with one additional electron or hole. We identify several stability issues, such as degenerate ground states and large single particle gaps, and provide possible fixes.
description: 20 pages, 20 figures
Διασύνδεση Βιβλιογραφικών Αναφορών της DBpedia σε άλλες Βιβλιογραφικές Βάσεις
Creators: name: Ναζαριάν, Δαβίδ Γκάικ
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Διασύνδεση βιβλιογραφικών αναφορών
Ανακάλυψη σύνδεσης
Σημασιολογικός Ιστός
Linking bibliographic references
Link discovery
Semantic Web

description: Σκοπός της διπλωματικής εργασίας ήταν η δημιουργία εναλλακτικών συνδέσεων για τις βιβλιογραφικές αναφορές της DBpedia, διασυνδέοντάς τες σε άλλες βιβλιογραφικές βάσεις, με το θέμα της εργασίας να είναι εμπνευσμένο από τον διαγωνισμό "DBpedia citations & references challenge". Η διαδικασία διασύνδεσης επιτεύχθηκε ύστερα από τη δημιουργία και αξιοποίηση της Java βιβλιοθήκης BibLinkCreator (Bibliographic Link Creator), που διαθέτει τη δυνατότητα εξαγωγής, προεπεξεργασίας, επαλήθευσης δεδομένων από ζεύγη RDF αποθετηρίων (συνόλων) και τη δημιουργία συνδέσεων μεταξύ τους. Η βιβλιοθήκη εξάγει δεδομένα βάσει διάφορων αναγνωριστικών όπως το ISBN, DOI, LCCN, κ.ά. και διασυνδέει τα URI των αναφορών ύστερα από την αντιστοίχιση αναγνωριστικών και τη διασφάλιση της ομοιότητας άλλων ιδιοτήτων. Συνολικά, επιτεύχθηκε η δημιουργία περισσότερων του ενός εκατομμυρίου εναλλακτικών συνδέσεων για τις βιβλιογραφικές αναφορές της DBpedia, ύστερα από τη διασύνδεση μέρους των URI που περιλαμβάνονται στο σύνολο δεδομένων της DBpedia (που έγινε διαθέσιμο μέσω του διαγωνισμού), σε διάφορα URI που περιλαμβάνονται σε ένα πλήθος από RDF σύνολα (διαθέσιμα για κατέβασμα ή έχοντας συλλεγεί από διεπαφές) σχετιζόμενα με τη βιβλιογραφία.
description: The purpose of the thesis was the creation of alternative links for the DBpedia bibliographical references, by linking them to other bibliographical databases, motivated by the competition "DBpedia citations & references challenge". The linking task was accomplished by creating and utilizing the Java library BibLinkCreator (Bibliographic Link Creator), which is capable of extracting, preprocessing, validating data from pairs of RDF repositories (datasets) and creating links between them. The library extracts data based on a number of identifiers such as ISBN, DOI, LCCN, etc., and links the citation URIs after matching identifiers and ensuring the similarity of other properties. In total, over a million alternative links were created for DBpedia bibliographic references, after linking URIs from the DBpedia citations dataset (made available during the competition), to URIs from a number of RDF datasets (available for download or collected via APIs) relevant to literature.
In-silico based identification of phytochemicals from Houttuynia cordata Thunb. as potential inhibitors for overexpressed HER2 and VEGFR2 cancer genes
Creators: name: Sanjib Kumar Das
name: Deka, Suman Jyoti
name: Dipayan Paul
name: Debmalya Das Gupta
name: Tridip Jyoti Das
name: Maravi, Devendra Kumar
name: Tag, Hui
name: Pallabi Kalita Hui
Publisher: name: Taylor & Francis
Year: 2021
Subjects: subject: Biophysics
subject: Biochemistry
subject: Cell Biology
subject: Molecular Biology
subject: Pharmacology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Immunology
subject: FOS: Clinical medicine
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Cancer

description: Human epidermal growth factor receptor2 (HER2) and Vascular endothelial growth factor receptor2 (VEGFR2) – a tyrosine kinase receptors play a key role in breast and stomach cancers. The overexpression of HER2 and VEGFR2 genes increases the number of HER2 and VEGFR2 in the cell which initiates breast and stomach cancer respectively. The phytochemicals from traditional medicinal herb Houttuynia cordata Thunb. are reported to possess anti-inflammatory and anti-cancer potential. However, isolation of phytochemicals from this herb is fraught with uncertainly and time-consuming. Here, a molecular docking approach provides probable binding affinities between the receptors and phytochemicals (ligands) which initiate the first step of anticancer drug discovery and development. In the present study, In-silico docking approaches were used to identify the top-hit phytochemicals from H. cordata as potential inhibitors for overexpressed HER2 (breast) and VEGFR2 (stomach) cancer genes. A total of 100 biologically active phytochemicals from H. cordata were screened and docked against the ligand-binding pocket of HER2 and VEGFR2 kinase domains. Docking results revealed only a few phytochemicals (molecules) which appropriately fit into the ligand-binding pocket with higher binding affinity than the natural ATP ligand. A competitive docking was used to ascertain the top-hit phytochemicals that bind perfectly to the ATP ligand-binding pocket. Among the top-hit phytochemicals docked from H. cordata, the β-sitosterol and Quercetin showed highest binding affinity towards HER2 and VEGFR2 receptors using both hydrogen and hydrophobic interactions. This study confirmed β-sitosterol and Quercetin as potential drug candidates against breast and stomach cancer. Communicated by Ramaswamy H. Sarma
Mechanisms of B cell Synapse Formation Predicted by Stochastic Simulation
Creators: name: Tsourkas, Philippos K.
name: Baumgarth, Nicole
name: Simon, Scott I.
name: Raychaudhuri, Subhadip
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantitative Methods (q-bio.QM)
subject: Subcellular Processes (q-bio.SC)
subject: FOS: Biological sciences

description: The clustering of B cell receptor (BCR) molecules and the formation of the protein segregation structure known as the immunological synapse appears to precede antigen (Ag) uptake by B cells. The mature B cell synapse is characterized by a central cluster of BCR/Ag molecular complexes surrounded by a ring of LFA-1/ICAM-1 complexes. Recent experimental evidence shows receptor clustering in B cells can occur via mechanical or signaling-driven processes. An alternative mechanism of diffusion and affinity-dependent binding has been proposed to explain synapse formation in the absence of signaling-driven processes. In this work, we investigated the biophysical mechanisms that drive immunological synapse formation in B cells across the physiological range of BCR affinity (KA~10^6-10^10 M-1) through computational modeling. Our computational approach is based on stochastic simulation of diffusion and reaction events with a clearly defined mapping between probabilistic parameters of our model and their physical equivalents. We show that a diffusion-and-binding mechanism is sufficient to drive synapse formation only at low BCR affinity and for a relatively stiff B cell membrane that undergoes little deformation. We thus predict the need for alternative mechanisms: a difference in the mechanical properties of BCR/Ag and LFA-1/ICAM-1 bonds and/or signaling driven processes.
description: 35 pages, 11 figures; Supplemental Materials added
A Convergência como tendência para a educação do presente Convergence as a trend for the education of the present
Creators: name: Campos, Fernanda
Publisher: name: Escola Superior de Educação de Paula Frassinetti - CIPAF
Year: 2019
Subjects: convergência na educação, ensino superior, tecnologias digitais da informação e da comunicação

description: Este artigo objetiva apresentar sinteticamente os argumentos apresentados em tese de doutoramento, que pretendeu compreender as possibilidades da convergência para o ensino superior. Os sentidos da convergência foram construídos a partir de ideias das áreas da comunicação, da informática e das artes. O estudo foi realizado a partir de a análise documental e estado da arte, em que evidenciou-se que a convergência, antes de mais, é social. Ela se faz nas relações criadas em rede e mediadas por Tecnologias Digitais da Informação e da Comunicação (TDIC) e ampliam os paradigmas educacionais, os locais de ensinar e aprender, as relações entre os sujeitos — professores e estudantes. Deste modo, a convergência se verifica como uma tendência para a educação do presente. Convergence as a trend for the education of the present This article aims to summarize the arguments presented in a doctoral thesis, which sought to understand the possibilities of convergence for higher education. The meanings of convergence were built on ideas from the areas of communication, information technology and the arts. The study was carried out from the documentary analysis and state of the art, in which it was shown that convergence, above all, is social. It is done in relationships created in networks and mediated by Digital Technologies of Information and Communication (TDIC) and broaden the educational paradigms, the places of teaching and learning, the relations between the subjects - teachers and students. In this way, convergence is seen as a tendency for the education of the present. Keywords: convergence in education, higher education, digital information and communication technologies
description: Saber & Educar, n. 25 (2018): Educar com TIC para o Século XXI
Λ polarization from thermalized jet energy
Creators: name: Serenone, Willian Matioli
name: Barbon, João Guilherme Prado
name: Chinellato, David Dobrigkeit
name: Lisa, Michael Annan
name: Shen, Chun
name: Takahashi, Jun
name: Torrieri, Giorgio
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We examine the formation of vortical "smoke rings" as a result of thermalization of energy lost by a jet. We simulate the formation and evolution of these rings using hydrodynamics and define an observable that allows to probe this phenomenon experimentally. We argue that observation of vorticity associated with jets would be an experimental confirmation of the thermalization of the energy lost by quenched jets, and also a probe of shear viscosity.
description: 8 pages, 7 figures
Proper actions and proper invariant metrics
Creators: name: Abels, Herbert
name: Manoussos, Antonios
name: Noskov, Gennady
Publisher: name: arXiv
Year: 2007
Subjects: subject: Metric Geometry (math.MG)
subject: General Topology (math.GN)
subject: FOS: Mathematics
subject: Primary 37B05, 54H15; Secondary 54H20, 54D45

description: We show that if a (locally compact) group $G$ acts properly on a locally compact $σ$-compact space $X$ then there is a family of $G$-invariant proper continuous finite-valued pseudometrics which induces the topology of $X$. If $X$ is furthermore metrizable then $G$ acts properly on $X$ if and only if there exists a $G$-invariant proper compatible metric on $X$.
description: The paper has been completely rewritten and differs essentially from "Constructing invariant Heine-Borel metrics for proper G-spaces". The main result extended to the more general case when $G$ is a topological group which acts properly on a locally compact $\sigma$-compact Hausdorff space $X$. Note that there is a gap in the proof of Theorem 2.4 of the old version
Hydraulic analysis of outflow winds in Howe Sound, British Columbia
Creators: name: Finnigan, Timothy D.
Publisher: name: University of British Columbia
Year: 2009

description: Previous studies (Jackson, 1993) suggest an outflow wind, which flows below an inversion in a well defined layer through Howe Sound, may exhibit hydraulic behaviour. Strong outflow winds in Howe Sound are simulated in the laboratory using a single fluid layer in a small scale one-dimensional physical model. Model results are presented and compared with observations recorded in Howe Sound during a severe outflow wind event in December, 1992. Field observations affirm the findings of the physical modelling with both indicating the presence and location of controls and hydraulic jumps in the wind layer. Hydraulic behaviour is found to change as the synoptic pressure gradient and the flow rate increase. An additional comparison is made with output from the computer model, Hydmod of Jackson and Steyn (1994b). Numerical simulations, configured for the conditions present in Howe Sound during the December, 1992 event, indicate channel hydraulics (and thus spatial wind speed variation) closely resembling the physical model and field results. Outflow winds are studied in more detail through a series of experiments conducted with a three-dimensional physical model which is geometrically and kinematically similar to the prototype, Howe Sound. The results reveal the structure of the wind layer over a wide range of possible field conditions. Hydraulic features, which do not behave in a traditionally one-dimensional manner, are identified. The 3D model results, although more detailed, verify the findings of the 1D modelling in general. Together the results provide a predictive tool for determining hazardous zones of extreme wind during an outflow event.
From Neutrino- to Photon-Cooled in Three Years: Can Fallback Accretion Explain the X-ray Excess in GW170817?
Creators: name: Metzger, Brian D.
name: Fernandez, Rodrigo
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: An excess in the X-ray emission from the neutron star merger GW170817 above the predicted afterglow was recently detected t~3.4 years post-merger. One possible origin for the excess is accretion onto the newly unshrouded black hole (BH) remnant. While fall-back of the bound dynamical ejecta is insufficient to generate the excess luminosity, L_X ~ 5e38 erg/s, fall-back from the disk wind ejecta-due to their larger mass and lower velocity-remains a viable possibility. We present hydrodynamic alpha-viscosity simulations of the post-merger disk evolution which extend to an unprecedently long timescale t ~ 35 s post-merger, as necessary to capture the end of photodissociation and the asymptotic evolution into the radiatively inefficient regime. Due to inefficient neutrino cooling, the BH accretion rate decays rapidly at late times (Mdot_BH ~ t^(-β_BH), where β_BH ~ 2.4-2.8), seemingly incompatible with generating the late-time excess. However, the rate at which matter falls back to the inner disk from the equatorial regions (as inferred by the rate matter is unbound in outflows by viscous heating at higher latitudes) decays more gradually, Mdot_fb ~ t^(-β_fb) with β_fb ~ 1.43 in our alpha ~ 0.03 simulations. By the present epoch, the fall-back rate has become sub-Eddington and the disk can again accrete efficiently, i.e. Mdot_BH ~ Mdot_fb, this time as a result of photon cooling instead of neutrino cooling. The predicted X-ray accretion luminosity at the present epoch is L_X ~ 0.1 Mdot_BH c^2 ~ (2-70)e38 erg/s for beta_FB ~ 1.43-1.66, thus supporting (with caveats) an accretion-powered origin for the X-ray excess in GW170817. The suppressed BH accretion rate prior to the radiatively efficient (sub-Eddington) transition, weeks to months after the merger, is key to avoid overproducing the kilonova luminosity via reprocessing.
description: 5 pages, 2 figures, ApJL
Using Sohn's law of additive reaction times for modeling a multiparticle reactor. The case of the moving bed furnace converting uranium trioxide into tetrafluoride
Creators: name: Patisson, F.
name: Dussoubs, B.
name: Ablitzer, D.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: One of the major issues with multiparticle reactors is to handle their multiscale aspect. For modeling, it usually comes to coupling a reactor model (describing the phenomena at the macroscopic scale) with a so-called grain model (simulating the behavior of a single grain or a particle). An interesting approach proposed by H.Y. Sohn (1978) is to use the law of additive reaction times in order to calculate, approximately but analytically, the reaction rate of a particle in the reactor model. Its great advantage, compared to a numerical grain model, is to drastically reduce the computation time, particularly in the case of complex reactor models. This is the approach we retained for modeling the moving bed furnace, a counter-current gas-solid reactor used in the nuclear fuel-making route for producing uranium tetrafluoride from uranium trioxide. The numerical model we developed is 2-dimensional, steady-state and based on the finite volume method. It describes solid and gas flow, convective, conductive and radiative heat transfers, and six chemical reactions involved in the process. The law of additive reaction times is used to calculate analytically the rate of the three principal gas-solid reactions at every discrete point in the reactor. We have demonstrated the validity of this approach by comparing its results with those calculated from a numerical grain model. Also detailed in the paper are the main results of the moving bed furnace model itself and the possibilities of optimizing the process revealed by the calculations.