cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Universal aspects of the phase diagram of QCD with heavy quarks
Creators: name: Maelger, Jan
name: Reinosa, Urko
name: Serreau, Julien
Publisher: name: arXiv
Year: 2018
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The flavor dependence of the QCD phase diagram presents universal properties in the heavy quark limit. For the wide class of models where the quarks are treated at the one-loop level, we show, for arbitrary chemical potential, that the flavor dependence of the critical quark masses-for which the confinement-deconfinement transition is second order-is insensitive to the details of the (confining) gluon dynamics and that the critical temperature is constant along the corresponding critical line. We illustrate this with explicit results in various such one-loop models studied in the literature: effective matrix models for the Polyakov loop, the Curci-Ferrari model, and a recently proposed Gribov-Zwanziger-type model. We further observe that the predictions which follow from this one-loop universality property are well satisfied by different calculations beyond one-loop order, including lattice simulations. For degenerate quarks, we propose a simple universal law for the flavor dependence of the critical mass, satisfied by all approaches.
description: 4 pages, 1 figure ; published version
Lung Clearance Index as a definitive surrogate endpoint for therapeutic interventions in cystic fibrosis
Creators: name: Bayfield, Katie Jill
Publisher: name: Imperial College London
Year: 2017

description: Lung Clearance Index (LCI), a measure of ventilation inhomogeneity, reflects disease in distal airways predominantly affected in cystic fibrosis (CF). I hypothesised that improved understanding of LCI’s clinimetric properties could support its progression to an accepted outcome measure. I aimed to define and explain differences between techniques and assess responsiveness to interventions. LCI is derived from multibreath washout of inert gas, usually sulphur hexafluoride (SF6) or Nitrogen (N2). I tested 47 CF patients and 42 healthy controls on both the Exhalyzer D (N2) and a modified Innocor device (SF6) demonstrating that although both correlated with forced expiratory volume in the 1st second (FEV1), LCI from N2 was consistently higher i.e. more abnormal. I designed a novel simultaneous washout system, which indicated that tissue N2 was likely a major contributor. I produced normal range data and confirmed the absence of diurnal effects. I was the senior site physiologist for the UK CF Gene Therapy Consortium’s phase 2b multi-dose trial. 116 CF patients completed 12 months of nebulised liposome-mediated gene therapy or placebo; the primary outcome, relative improvement in FEV1, was met. Similar improvements were not detected by LCI. My detailed exploratory analysis failed to fully explain this although it seems likely related to failure of sufficient inhaled drug reaching the distal airways. In parallel, I performed serial LCIs on CF patients prescribed treatment changes. Although FEV1 improved LCI did not, even in subgroups based on disease severity/ stability and intervention. Sample sizes were small, and patient convenience precluded standardisation of time points; further prospective data are needed. This thesis contributes to our understanding of differences between LCI techniques, emphasising the fact that results are not interchangeable. Unlike in early CF, when used in a population with wider disease severity, LCI does not appear to offer an advantage for monitoring over FEV1.
title: ADCO, Cartulaire de l'abbaye de Cîteaux dit Cartulare Antiquum t.3 (2e moitié XIIIe siècle), Cart. 168 (11 H 66), f. 0187v-bis
Creators: name: de la Côte d'Or, Archives départementales
name: Archives Départementales De La Côte-D'Or
name: Petot, Frédérique
name: Projet CBMA
name: CG21/F.PETOT/2010
name: Petot, Frédéric
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2020
Subjects: subject: Corpus Burgundiae Medii Aevi
subject: Chartes de la Bourgogne du Moyen Âge
subject: LaMOP
subject: Laboratoire de Médiévistique Occidentale de Paris
subject: cartulaire

description: Cartulaire de l'abbaye de Cîteaux dit Cartulare Antiquum t.3 (2e moitié XIIIe siècle), Archives départementales de la Côte-d'Or, Cart. 168 (11 H 66), f. 0187v-bis, Numérisation en mode image.
description: Relation: http://www.cbma-project.eu/
description: Bibliographic citation: Cartulaire de l'abbaye de Cîteaux dit Cartulare Antiquum t.3 (2e moitié XIIIe siècle), Archives départementales de la Côte-d'Or, Cart. 168 (11 H 66), f. 0187v-bis, in Projet CBMA - Corpus Burgundiae Medii Aevi [Ressource en ligne], https:// manuscrits.cbma-project.eu/
description: Provenance: abbaye de Cîteaux
description: Provenance: http://www.wikidata.org/entity/Q843261
description: Provenance: https://www.geonames.org/3024876
description: Provenance: http://www.idref.fr/030974844/id
description: Provenance: https://catalogue.bnf.fr/ark:/12148/cb12228351v
PUSHing Core-Collapse Supernovae to Explosions in Spherical Symmetry III: Nucleosynthesis Yields
Creators: name: Curtis, Sanjana
name: Ebinger, Kevin
name: Fröhlich, Carla
name: Hempel, Matthias
name: Perego, Albino
name: Liebendörfer, Matthias
name: Thielemann, Friedrich-Karl
Publisher: name: arXiv
Year: 2018
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: In a previously presented proof-of-principle study, we established a parametrized spherically symmetric explosion method (PUSH) that can reproduce many features of core-collapse supernovae for a wide range of pre-explosion models. The method is based on the neutrino-driven mechanism and follows collapse, bounce and explosion. There are two crucial aspects of our model for nucleosynthesis predictions. First, the mass cut and explosion energy emerge simultaneously from the simulation (determining, for each stellar model, the amount of Fe-group ejecta). Second, the interactions between neutrinos and matter are included consistently (setting the electron fraction of the innermost ejecta). In the present paper, we use the successful explosion models from Ebinger et al. (2018) which include two sets of pre-explosion models at solar metallicity, with combined masses between 10.8 and 120 M$_{\odot}$. We perform systematic nucleosynthesis studies and predict detailed isotopic yields. The resulting $^{56}$Ni ejecta are in overall agreement with observationally derived values from normal core-collapse supernovae. The Fe-group yields are also in agreement with derived abundances for metal-poor star HD84937. We also present a comparison of our results with observational trends in alpha element to iron ratios.
description: 24 pages, 10 figures, 8 tables (Accepted, ApJ)
On Measuring Chemical Abundances in Distant Galaxies Using Global Emission Line Spectra
Creators: name: Kobulnicky, Henry A.
name: Kennicutt, Robert C.
name: Pizagno, James L.
Publisher: name: arXiv
Year: 1998
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The advent of 8--10 meter class telescopes enables direct measurement of the chemical properties in the ionized gas of cosmologically--distant galaxies with the same nebular analysis techniques used in local H II regions. We show that spatially unresolved (i.e., global) emission line spectra can reliably indicate the chemical properties of distant star-forming galaxies. However, standard nebular chemical abundance measurement methods (those with a measured electron temperature from [O III] lambda4363) may be subject to small systematic errors when the observed volume includes a mixture of gas with diverse temperatures, ionization parameters, and metallicities. To characterize these systematic effects, we compare physical conditions derived from spectroscopy of individual H II regions with results from global galaxy spectroscopy. We consider both low-mass, metal poor galaxies with uniform abundances and larger galaxies with internal chemical gradients. Well-established empirical calibrations using strong-line ratios can serve as reliable (~0.2 dex) indicators of the overall systemic oxygen abundance even when the signal-to-noise of the Hbeta and [O III] emission lines is as low as 8:1. We present prescriptions, directed toward high-redshift observers, for using global emission line spectra to trace the chemical properties of star-forming galaxies in the distant universe. [abridged]
description: Accepted for Publication in the Astrophysical Journal; 34 pages, 10 figures, uses AASTeX and psfig
Correspondence between bulk entanglement and boundary excitation spectra in 2d gapped topological phases
Creators: name: Luo, Zhu-Xi
name: Pankovich, Brendan G.
name: Hu, Yuting
name: Wu, Yong-Shi
Publisher: name: arXiv
Year: 2018
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study the correspondence between boundary spectrum of non-chiral topological orders on an open manifold $\mathcal{M}$ with gapped boundaries and the entanglement spectrum in the bulk of gapped topological orders on a closed manifold. The closed manifold is bipartitioned into two subsystems, one of which has the same topology as $\mathcal{M}$. Specifically, we focus on the case of generalized string-net models and discuss the cases where $\mathcal{M}$ is a disk or a cylinder. When $\mathcal{M}$ has the topology of a cylinder, different combinations of boundary conditions of the cylinder will correspond to different entanglement cuts on the torus. When both boundaries are charge (smooth) boundaries, the entanglement spectrum can be identified with the boundary excitation distribution spectrum at infinite temperature and constant fugacities. Examples of toric code, $\mathbb{Z}_N$ theories, and the simple non-abelian case of doubled Fibonacci are demonstrated.
description: version 3
Gamma-ray bursts from X-ray binaries
Creators: name: Spruit, H. C.
Publisher: name: arXiv
Year: 1998
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: A weakly magnetized ($\sim 10^7$G) neutron star, slowly spun up by accretion in an X-ray binary, crosses the instability boundary for r-mode instability at P=1--2 msec. The amplitude of the oscillation, which initially increases only at the spinup time scale, is secularly unstable due to the negative temperature dependence of the viscosity in neutron star matter, and diverges after a few hundred years. Angular momentum loss by the gravitational wave causes strong differential rotation, in which the magnetic field is wound up to $10^{17}$G on a time scale of a few months. When this field becomes unstable to buoyancy instability, a surface field strength of a few $10^{16}$G is produced on a time scale of seconds, which then powers a GRB with energies of $\sim 1-8\times 10^{51}$ and duration of 1--100 sec.
description: A&A accepted. typos and extended discussion
Companhias aéreas são todas iguais? A convergência dos modelos de negócios no transporte aéreo
Creators: name: de Oliveira, Renan P.
name: Oliveira, Alessandro V. M.
Publisher: name: arXiv
Year: 2024
Subjects: subject: General Economics (econ.GN)
subject: FOS: Economics and business

description: This study discusses the literature on the convergence of business models of airlines in Brazilian air transport, focusing on the formation of flight networks. Initially, it analyzes the determinants of the network formation patterns of the "fundamental" business models (archetypes) of airlines in the first years after the sector's deregulation. Then, it discusses how the business models of Brazilian companies resemble these patterns. The literature highlights convergences between the network formation strategies of full-service companies in relation to older low-cost companies, in addition to business model redirections after mergers and acquisitions.
description: This article is written in Portuguese
Meleagris Linnaeus, 1758, gen. nov.
Creators: name: Linnaeus, Carolus
Publisher: name: Laurentius Salvius
Year: 1758
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Aves
Galliformes
Phasianidae
Meleagris

description: Meleagris [gen. nov.]
Caput carunculis spongiosis tectum.
description: Published as part of Linnaeus, Carolus, 1758, Systema Naturae per regna tria naturae: secundum classes, ordines, genera, species, cum characteribus, differentiis, synonymis, locis, Stockholm :Laurentius Salvius on page 156, DOI: 10.5962/bhl.title.542, http://zenodo.org/record/3922206
Revealing Color Forces with Transverse Polarized Electron Scattering
Creators: name: Armstrong, W.
name: Kang, H.
name: Liyanage, A.
name: Maxwell, J.
name: Mulholland, J.
name: Ndukum, L.
name: Ahmidouch, A.
name: Albayrak, I.
name: Asaturyan, A.
name: Ates, O.
name: Baghdasaryan, H.
name: Boeglin, W.
name: Bosted, P.
name: Brash, E.
name: Butuceanu, C.
name: Bychkov, M.
name: Carter, P.
name: Chen, C.
name: Chen, J. -P.
name: Choi, S.
name: Christy, M. E.
name: Covrig, S.
name: Crabb, D.
name: Danagoulian, S.
name: Daniel, A.
name: Davidenko, A. M.
name: Davis, B.
name: Day, D.
name: Deconinck, W.
name: Deur, A.
name: Dunne, J.
name: Dutta, D.
name: Fassi, L. El
name: Ellis, C.
name: Ent, R.
name: Flay, D.
name: Frlez, E.
name: Gaskell, D.
name: Geagla, O.
name: German, J.
name: Gilman, R.
name: Gogami, T.
name: Gomez, J.
name: Goncharenko, Y. M.
name: Hashimoto, O.
name: Higinbotham, D.
name: Horn, T.
name: Huber, G. M.
name: Jones, M.
name: Jones, M. K.
name: Kalantarians, N.
name: Kang, H-K.
name: Kawama, D.
name: Keith, C.
name: Keppel, C.
name: Khandaker, M.
name: Kim, Y.
name: King, P. M.
name: Kohl, M.
name: Kovacs, K.
name: Kubarovsky, V.
name: Li, Y.
name: Liyanage, N.
name: Luo, W.
name: Mack, D.
name: Mamyan, V.
name: Markowitz, P.
name: Maruta, T.
name: Meekins, D.
name: Melnik, Y. M.
name: Meziani, Z. -E.
name: Mkrtchyan, A.
name: Mkrtchyan, H.
name: Mochalov, V. V.
name: Monaghan, P.
name: Narayan, A.
name: Nakamura, S. N.
name: Nuruzzaman, A.
name: Pentchev, L.
name: Pocanic, D.
name: Posik, M.
name: Puckett, A.
name: Qiu, X.
name: Reinhold, J.
name: Riordan, S.
name: Roche, J.
name: Rondón, O. A.
name: Sawatzky, B.
name: Shabestari, M.
name: Slifer, K.
name: Smith, G.
name: Soloviev, L. F.
name: Solvignon, P.
name: Tadevosyan, V.
name: Tang, L.
name: Vasiliev, A. N.
name: Veilleux, M.
name: Walton, T.
name: Wesselmann, F.
name: Wood, S.
name: Yao, H.
name: Ye, Z.
name: Zhang, J.
name: Zhu, L.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: The Spin Asymmetries of the Nucleon Experiment (SANE) measured two double spin asymmetries using a polarized proton target and polarized electron beam at two beam energies, 4.7 GeV and 5.9 GeV. A large-acceptance open-configuration detector package identified scattered electrons at 40$^{\circ}$ and covered a wide range in Bjorken $x$ ($0.3 < x < 0.8$). Proportional to an average color Lorentz force, the twist-3 matrix element, $\tilde{d}_2^p$, was extracted from the measured asymmetries at $Q^2$ values ranging from 2.0 to 6.0 GeV$^2$. The data display the opposite sign compared to most quark models, including the lattice QCD result, and an apparently unexpected scale dependence. Furthermore when combined with the neutron data in the same $Q^2$ range the results suggest a flavor independent average color Lorentz force.
Nature of Hard X-ray Source from Optical Identification of the ASCA Large Sky Survey
Creators: name: Akiyama, M.
name: Ohta, K.
name: Yamada, T.
name: Ueda, Y.
name: Takahashi, T.
name: Sakano, M.
name: Tsuru, T.
name: Lehmann, I.
name: Hasinger, G.
Publisher: name: arXiv
Year: 1998
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present results of optical identification of the ASCA Large Sky Survey. X-ray sources which have hard X-ray spectra were identified with type-2 AGN at redshifts smaller than 0.5. It is supported that the absorbed X-ray spectrum of type-2 AGN makes the Cosmic X-ray Background harder in the hard X-ray band than type-1 AGN, which is main contributer in the soft X-ray band. Absence of type-2 AGN at redshift larger than 1 in the identified sample, which contrasts to the existence of 6 broad-line QSOs, suggests a deficiency of so-called ``type-2 QSO'' at high redshift.
description: 6 pages, 6 figures. Proceeding of the first XMM workshop "Science with XMM" (30 Sep. - 2 Oct. 1998 ESTEC)
Parallel computing, interval derivative methods, heuristic algorithms, and their implementation in a numerical solver, for deterministic global optimization
Creators: name: Kazazakis, Nikolaos
Publisher: name: Imperial College London
Year: 2016

description: This thesis presents new algorithms for the deterministic global optimization of general non-linear programming problems (NLPs). It is proven that the αBB general underestimator may provide exact lower bounds on a function only if rigorous conditions are satisfied. These conditions are derived and the μ-subenergy methodology is proposed to achieve tighter αBB underestimation when they are violated. An interval lower bounding test is proposed to improve αBB lower bounds and avoid expensive algorithmic steps. Piecewise-linear relaxations (PLR) are proposed for the underestimation of general functions. Calculation of these relaxations is accelerated using parallel computing. Quality bounds tightening (QBT) is proposed to reduce the cost of bounds tightening algorithms by avoiding unnecessary calculations. Violation branching is proposed to improve the performance of branching strategies by considering constraint violation when selecting a branching variable. Furthermore, a novel bounds tightening method, PLR bounds tightening (PLR-BT), is proposed. Variable-based convexity (VBC) is proposed as a general reformulation algorithm, to build tighter relaxations by exploiting underlying convexity. This work also introduces algorithms for parallel branching for the global solution of NLPs. A parallel node subdivision strategy, Multisection Branching, is proposed to achieve tighter bounds, and a parallel node selection strategy, Future Branching, is proposed to accelerate the investigation of the branch-and-bound tree. A parallel solver is presented, where MPI is used to distribute node calculations and an asynchronous bounds tightening algorithm is proposed to reduce bounds tightening wall times. This algorithm is implemented using multithreading for asynchronous feasibility-based bounds tightening (AF-BBT). All algorithms are implemented in a global solver, and its parallel architecture and features are described. This solver is used to perform numerical studies on the benefits of using the new algorithms in tandem. The new solver is benchmarked against the BARON 15.9.22 global solver for a set of problems, in which it achieves comparable performance.
Stability of disk galaxies in the modified dynamics
Creators: name: Brada, Rafael
name: Milgrom, Mordehai
Publisher: name: arXiv
Year: 1998
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: General analytic arguments lead us to expect that in the modified dynamics (MOND) self-gravitating disks are more stable than their like in Newtonian dynamics. We study this question numerically, using a particle-mesh code based on a multi-grid solver for the (nonlinear) MOND field equation. We start with equilibrium distribution functions for MOND disk models having a smoothly truncated, exponential surface-density profiles and a constant Toomre $Q$ parameter. We find that, indeed, disks of a given ``temperature'' are locally more stable in MOND than in Newtonian dynamics. As regards global instability to bar formation, we find that as the mean acceleration in the disk is lowered, the stability of the disk is increased as we cross from the Newtonian to the MOND regime. The degree of stability levels off deep in the MOND regime, as expected from scaling laws in MOND. For the disk model we use, this maximum degree of stability is similar to the one imparted to a Newtonian disk by a halo three times as massive at five disk scale lengths.
description: 20 pages, Latex, 8 embedded figures, version to be published in The Astrophys. J
Mortality rates from Interactive effects of tree size, crown exposure and logging on drought-induced mortality
Creators: name: Shenkin, Alexander
name: Bolker, Benjamin
name: Marielos Peña-Claros
name: Licona, Juan Carlos
name: Ascarrunz, Nataly
name: Putz, Francis E.
Publisher: name: The Royal Society
Year: 2018
Subjects: subject: Environmental Science
subject: Ecology
subject: FOS: Biological sciences
subject: Plant Biology

description: Annualized mortality rates for size and exposure classes of trees in logged and unlogged plots across a range of climatological moisture conditions.
A Study of High Energy Emission from the TeV blazar Mrk 501 during Multiwavelength Observations in 1996
Creators: name: Kataoka, J.
name: Mattox, J. R.
name: Quinn, J.
name: Kubo, H.
name: Makino, F.
name: Takahashi, T.
name: Inoue, S.
name: Hartman, R. C.
name: Madejski, G. M.
name: Sreekumar, P.
name: Wagner, S. J.
Publisher: name: arXiv
Year: 1998
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present the results of a multiwavelength campaign for Mrk 501 performed in March 1996 with ASCA, EGRET, Whipple, and optical telescopes. In the X-ray band, a spectral break was observed around 2 keV. We report here for the first time the detection of high-energy gamma-ray flux from Mrk 501 with EGRET with 3.5 sigma significance (E>100 MeV). Higher flux was also observed in April/May 1996, with 4.0 sigma significance for E>100 MeV, and 5.2 sigma significance for E>500 MeV. The gamma-ray spectrum was measured to be flatter than most of the gamma-ray blazars. We find that the multiband spectrum in 1996 is consistent with that calculated from a one-zone SSC model in a homogeneous region. In the context of this model, we investigate the values of the magnetic field strength and the beaming factor allowed by the observational results. We compare the March 1996 multiwavelength spectrum with that in the flare state in April 1997. Between these two epochs, the TeV flux increase is well correlated with that observed in keV range. The keV and TeV amplitudes during the April 1997 flare are accurately reproduced, assuming that the population of synchrotron photons in 1996 are scattered by the newly injected relativistic electrons, having maximum energies of G_max = 6.0e6. However, the TeV spectrum observed during March 1996 campaign is flatter than predicted by our models. We find that this cannot be explained by either higher order Comptonization or the contribution of the `seed' IR photons from the host galaxy for the first-order external radiation Comptonization.
description: 26 pages, 5 figures, to appear in the Astrophysical Journal, Vol.514 (March 20, 1999)
SI figure 1-9 from Adaptive periodicity in the infectivity of malaria gametocytes to mosquitoes
Creators: name: Schneider, Petra
name: Rund, Samuel S. C.
name: Smith, Natasha L.
name: Prior, Kimberley F.
name: O'Donnell, Aidan J.
name: Reece, Sarah E.
Publisher: name: The Royal Society
Year: 2018
Subjects: subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: Ecology
subject: 60801 Animal Behaviour

description: Supplementary figures 1-9
Rescaled Objective Solutions of Fokker-Planck and Boltzmann equations
Creators: name: Matthies, Karsten
name: Theil, Florian
Publisher: name: arXiv
Year: 2018
Subjects: subject: Analysis of PDEs (math.AP)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: We study the long-time behavior of symmetric solutions of the nonlinear Boltzmann equation and a closely related nonlinear Fokker-Planck equation. If the symmetry of the solutions corresponds to shear flows, the existence of stationary solutions can be ruled out because the energy is not conserved. After anisotropic rescaling both equations conserve the energy. We show that the rescaled Boltzmann equation does not admit stationary densities of Maxwellian type (exponentially decaying). For the rescaled Fokker-Planck equation we demonstrate that all solutions converge to a Maxwellian in the long-time limit, however the convergence rate is only algebraic, not exponential.
description: 25 pages; v2: improved presentation, conclusion added
Prime filter structures of pseudocomplemented Kleene algebras and representation by rough sets
Creators: name: Järvinen, Jouni
name: Radeleczki, Sándor
Publisher: name: arXiv
Year: 2018
Subjects: subject: Logic (math.LO)
subject: FOS: Mathematics
subject: Primary 06B15, Secondary 06D15, 06D30, 68T37

description: We introduce Kleene-Varlet spaces as partially ordered sets equipped with a polarity satisfying certain additional conditions. By applying Kleene-Varlet spaces, we prove that each regular pseudocomplemented Kleene algebra is isomorphic to a subalgebra of the rough set regular pseudocomplemented Kleene algebra defined by a tolerance induced by an irredundant covering. We also characterize the Kleene-Varlet spaces corresponding to the regular pseudocomplemented Kleene algebras satisfying the Stone identity.
description: The title of the work has changed from the first version. Section 5 is largely rewritten. New references are also added
Determinantes concorrenciais dos atrasos dos voos no aeroporto e na rota
Creators: name: Bendinelli, William E.
name: Oliveira, Alessandro V. M.
Publisher: name: arXiv
Year: 2024
Subjects: subject: General Economics (econ.GN)
subject: FOS: Economics and business

description: Flight delays are a reality in the modern air industry worldwide. However, studies in the literature have investigated the competitive determinants of delays arising from factors originating at the airport and along the route separately. This work aims to present a national study that used a unifying approach from the literature, considering the local and global effects of competition on delays. The analysis took into account a phenomenon known as the "internalization of externalities" of airport congestion. Furthermore, it discusses the relationship between quality and competition on the route and the impacts of the entry of a low-cost carrier (LCC) on the delays of incumbent airlines in the Brazilian air market. The literature suggests that there is evidence of congestion internalization at Brazilian airports, in parallel with competition for quality at the route level. Additionally, the potential competition caused by the presence of the LCC leads to a global effect that suggests the existence of impacts other than prices on routes where it has not entered.
description: This article is written in Portuguese
Hypervirial and Ehrenfest theorems in spherical coordinates: systematic approach
Creators: name: Khelashvili, Anzor
name: Nadareishvili, Teimuraz
Publisher: name: arXiv
Year: 2018
Subjects: subject: Quantum Physics (quant-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: Elaboration of some fundamental relations in three dimensional quantum mechanics is considered taking into account the restricted character of areas in radial distance. In such cases the boundary behavior of the radial wave function and singularity of operators at the origin of coordinates contribute to these relations. We derive the relation between the average value of the operator time derivative and the time derivative of mean value of this operator, which is usually considered to be the same by definition. The deviation from the known result is deduced and manifested by extra term, which depends on the boundary behavior mentioned above. The general form for this extra term takes place in the hypervirial like theorems. As a particular case, the virial theorem for Coulomb and oscillator potentials is considered and correction to the Kramers sum rule is derived. Moreover the corrected Ehrenfest theorem is deduced and its consistency with real physical picture is demonstrated.
description: 31 pages
Characterisation of oxy-fuel flames using laser based diagnostics techniques
Creators: name: Meor Zulkifli, Meor Mohd Faisal
Publisher: name: Imperial College London
Year: 2016

description: Oxygen enhanced oxy-fuel laminar and turbulent flame structure in a co-flow non-premixed jet burner are investigated. The measurement of intermediate species such as hydroxyl (OH) and formaldehyde (CH2O) and temperature are the focus of this work. The species concentrations were measured using planar laser induced fluorescence (PLIF) and the temperature using Rayleigh scattering. ‘Traditional Rayleigh’ requires a constant Rayleigh cross-section throughout the combustion process. This is impossible in high temperature oxy-fuel flames due to thermal decomposition. Derived temperature from Rayleigh signals is hence prone to inaccuracy. A direct comparison of measured and numerically-calculated Rayleigh signals can eliminate this error. Numerical Rayleigh signals are relatively easily calculated with knowledge of temperature and species concentration. The feasibility of adopting this procedure to validate the numerical model was investigated in laminar and turbulent flames. Sensitivity studies including radiation models, chemical kinetics mechanisms and the Soret effect were performed in laminar flames. Another Rayleigh technique, polarised/ depolarised Rayleigh was employed in a joint temperature, OH and CH2O measurement. The effect of varying O2 and jet Reynolds number on the flame structure was investigated. The applicability of determining heat release rate (HRR) using the product of [OH]x[CH2O] was also determined. [OH]x[CH2O] and HRR showed good spatial correlation in the main oxidation zone, but underestimated HRR in the secondary oxidation zone. Finally, analysis of thermal diffusion structures using high resolution polarised/ depolarised Rayleigh was performed. The analysis revealed the thickness of the diffusion layer is proportional to the temperature, axial location and O2 concentration. Increase of Reynolds number, however, reduces layer thickness. In summary, this work has used a suite of optical diagnostics to make the first structural survey of high temperature oxy-fuel flames, starting with overall flame shape through macroscopic localised extinction to microscopic thermal diffusion.
Impactos da Navegação Baseada em Performance nos Tempos de Voo da Aviação Comercial
Creators: name: Szenczuk, João B. T.
name: Oliveira, Alessandro V. M.
Publisher: name: arXiv
Year: 2024
Subjects: subject: General Economics (econ.GN)
subject: FOS: Economics and business

description: This work presents an analysis of recent literature examining factors that influence flight times in Brazil, with special attention to the impact of new technology implementations, specifically Performance-Based Navigation (PBN). PBN procedures began to be implemented in Brazilian airspace in 2009 and represent a new concept of air navigation, using satellites to create 3D flight routes that are shorter and more precise, potentially reducing the distances flown and consequently flight times and delays. Flight times depend on various factors, such as the size and complexity of the origin and destination airports, weather conditions, aircraft models, and how full the flights are. Therefore, to assess the impact of the new procedures, the variation in this set of factors must be taken into account. The results found in the literature suggest that Performance-Based Navigation had a positive impact, reducing flight times by about 1-2%, representing a saving of tens of thousands of flight hours from the beginning of implementations in 2009 until the end of 2018.
description: This article is written in Portuguese
Improving engine efficiency via polymer shear thinning
Creators: name: Marx, Nigel
Publisher: name: Imperial College London
Year: 2016

description: This thesis investigates the extent to which viscosity modifier additive shear thinning can be used to reduce hydrodynamic friction and thus improve engine efficiency while not impacting too greatly on hydrodynamic film thickness. Novel experimental techniques are developed to measure shear-dependent viscosity over a large shear rate range. A model hydrodynamic lubricated contact is established using a steel ball rolling/sliding against a polymer disc. This enables low contact pressures, thus avoiding significant piezoviscous effects. Novel methods are developed to measure film thickness and friction in such contacts. Film thickness measurements on Newtonian oils in soft contacts are used to test experimentally existing soft EHL theoretical equations and to revise these. Polymer-containing oils give thinner than predicted film thickness due to shear thinning in the contact inlet induced by lubricant backflow and by the sliding speed between the rubbing surfaces. Measurements have been compared with predictions implementing existing inlet strain rate equations combined with experimental flow curves. Theoretical equations under-predict the impact of inlet shear thinning on film thickness. Hydrodynamic friction measurements with Newtonian oils show the expected linear dependence against sliding speed. Unfortunately, the shear stress determined from such measurements is greater than expected from theory. Despite considerable efforts, the origins of this discrepancy have not been established, which necessitates a correction factor when determining the shear stress of polymer-containing oils. Using this factor the expected reduction in hydrodynamic friction of polymer-containing oils is observed. Overall it is found that shear thinning allows polymer-containing lubricants to produce smaller rates of increase in film thickness and friction with sliding speed in hydrodynamic lubrication than seen for Newtonian oils. Thus the slope of the Stribeck curve in the hydrodynamic regime is reduced. Hence, an oil may be designed to shear thin, adapt to the variable engine conditions and thus improve engine efficiency.
Upscaling polymer flooding to model sub-grid block geological heterogeneity and compensate for numerical dispersion
Creators: name: Aldhuwaihi, Abdulaziz
Publisher: name: Imperial College London
Year: 2016

description: Secondary polymer flooding can significantly improve oil recovery over that obtained by waterflooding. This is achieved principally by improving the water-oil mobility ratio and thus reducing channelling. There are, however, several polymer-specific mechanisms (such as adsorption, mixing, permeability reduction, non-Newtonian flows) that make it more difficult to model numerically compared with waterflooding. Upscaling reservoir properties for reservoir simulation is one of the most important steps in the workflow for building robust dynamic simulation models. It is necessary to reduce computing time and resources when it is not possible to run multiple high resolution models (e.g. as in evaluating the impact of geological uncertainty). This is normally achieved by modifying the inputs to reservoir simulation to represent the influence of sub-grid block heterogeneities on large scale flow and also to compensate for numerical dispersion. At the time of writing there are no accepted methods for upscaling polymer flooding. This study investigates the possibility of creating a methodology to upscale the permeability, the relative permeability, and polymer properties such as adsorption and non-Newtonian flow index. This helps to better represent the secondary polymer flood process by accounting for sub-grid block heterogeneity and compensate for numerical dispersion. The proposed methodology consists of four stages: First, the absolute permeability is upscaled using any of the available upscaling techniques in the literature. This will allow representing the effects of geological heterogeneity on pressure. Second, the effective relative permeability curves are calculated to represent these heterogeneities on the flood front conformance. Third, traditional dynamic pseudo methods are used to compensate for numerical dispersion. Finally, upscale polymer properties to better represent the average polymer concentration distribution in the reservoir. An experimental design has been conducted to identify which polymer property have the most effect in polymer flood simulation. Both the experimental design and the proposed methodology have been demonstrated on a series of 1D and 2D runs with various heterogeneity levels. An alternative method is also presented which is based on volume averaging of properties. This is similar to the pseudoization techniques used for the upscaling the relative permeability with the addition of pseudoizing both adsorption and polymer viscosity in order to accurately represent track the polymer front in the coarse grid model. this method is also tested using several 1D and 2D cases with different permeability distributions.
Massively parallel quantum computer simulator, eleven years later
Creators: name: De Raedt, Hans
name: Jin, Fengping
name: Willsch, Dennis
name: Nocon, Madita
name: Yoshioka, Naoki
name: Ito, Nobuyasu
name: Yuan, Shengjun
name: Michielsen, Kristel
Publisher: name: arXiv
Year: 2018
Subjects: subject: Quantum Physics (quant-ph)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: A revised version of the massively parallel simulator of a universal quantum computer, described in this journal eleven years ago, is used to benchmark various gate-based quantum algorithms on some of the most powerful supercomputers that exist today. Adaptive encoding of the wave function reduces the memory requirement by a factor of eight, making it possible to simulate universal quantum computers with up to 48 qubits on the Sunway TaihuLight and on the K computer. The simulator exhibits close-to-ideal weak-scaling behavior on the Sunway TaihuLight,on the K computer, on an IBM Blue Gene/Q, and on Intel Xeon based clusters, implying that the combination of parallelization and hardware can track the exponential scaling due to the increasing number of qubits. Results of executing simple quantum circuits and Shor's factorization algorithm on quantum computers containing up to 48 qubits are presented.
description: Substantially rewritten + new data. Published in Computer Physics Communication
Spectroscopy Of Low Metallicity Giant H II Regions: A grid of low Metallicity Stellar atmospheres
Creators: name: Pistinner, S. L.
name: Hauschildt, P. H.
name: Eichler, D.
name: Baron, E. A.
Publisher: name: arXiv
Year: 1998
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We calculate a grid of spherically symmetric OB stellar atmospheres at low metallicities, including both non-local thermodynamic equilibrium (NLTE) and metal line blanketing effects. This is done to assess the uncertainties in helium abundance determination by nebular codes due to input stellar atmosphere models. The more sophisticated stellar atmosphere models we use can differ from LTE models by as much as 40 percent in the ratio of He to H-ionizing photons.
Meleagris gallopavo Linnaeus, 1758, spec. nov.
Creators: name: Linnaeus, Carolus
Publisher: name: Laurentius Salvius
Year: 1758
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Aves
Galliformes
Phasianidae
Meleagris
Meleagris gallopavo

description: Meleagris gallopavo [spec. nov.]
M. capite caruncula frontali, cristaque gulari, maris pectore barbato.
Meleagris. Fn. svec. 164.
Gallo-pavo sylvestris novae angliae. Raj. av. 51. Alb. av. 3. p. 33. t. 35.
Gallopavo. Gesn. av. 482. Aldr. orn. l. 13. c. 4. Bell. av. 60. a. Jonst. av. 58. t. 24. Will. orn. 113. t. 27. Raj. av. 51.
Gallopavo cristatus. Alb. av. 2. p. 30. t. 33.
Habitat in America septentrionali.
Mas exaestuat inflato pectore, expansa cauda, sanguinea facie, relaxata frontis caruncula: irae tenax; Sapida caro. Rectrices XVIII. Barba pectoris tertio anno excrescit.
description: Published as part of Linnaeus, Carolus, 1758, Systema Naturae per regna tria naturae: secundum classes, ordines, genera, species, cum characteribus, differentiis, synonymis, locis, Stockholm :Laurentius Salvius on pages 156-157, DOI: 10.5962/bhl.title.542, http://zenodo.org/record/3922206
ZOONIM VA FITONIMLI PAREMIOLOGIK BIRLIKLARNING, FRAZEOLOGIZMLARNING FUNKSIONAL – SEMANTIK TASNIFLANISHI
Creators: name: Raximova, Malika
Publisher: name: Zenodo
Year: 2024

description: Ushbu maqolada nemis va o’zbek tillaridagi frezeologik, paremiologik birliklarda hayvon va o’simliklar nomlarining ishlatilishi, funsional semantik  jihatdan tasniflangan
Supplementary Methods from A non-coding region near Follistatin controls head colour polymorphism in Gouldian finch
Creators: name: Toomey, Matthew B.
name: Marques, Cristiana
name: Andrade, Pedro
name: Araújo, Pedro M.
name: Sabatino, Stephen
name: Małgorzata A. Gazda
name: Afonso, Sandra
name: Lopes, Ricardo J.
name: Corbo, Joseph C.
name: Carneiro, Miguel
Publisher: name: The Royal Society
Year: 2018
Subjects: subject: Genetics
subject: FOS: Biological sciences
subject: Evolutionary Biology
subject: 60408 Genomics

description: Includes full Methods and Materials
title: ADCO, Ordre cistercien : comptes (1499-1515) (11 H 1162), f. 00348
Creators: name: de la Côte-d'Or, Archives départementales
name: Petot, Frédéric
name: Archives Départementales De La Côte-D'Or
name: Petot, Frédérique
name: Projet CBMA
name: CBMA/CG21/F.PETOT/2019
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2020
Subjects: subject: comptes
subject: LaMOP
subject: Laboratoire de Médiévistique Occidentale de Paris
subject: Corpus Burgundiae Medii Aevi
subject: Chartes de la Bourgogne du Moyen Âge

description: Ordre cistercien : comptes (1499-1515), Archives départementales de la Côte-d'Or, (11 H 1162). Numérisation en mode image.
description: Relation: http://www.cbma-project.eu/
description: Bibliographic citation: Ordre cistercien : comptes (1499-1515), Archives départementales de la Côte-d'Or, (11 H 1162), f. 00348, in Projet CBMA - Corpus Burgundiae Medii Aevi \[Ressource en ligne\], https:// manuscrits.cbma-project.eu/
description: Provenance: https://www.geonames.org/3024876
description: Provenance: http://www.idref.fr/030974844/id
description: Provenance: https://catalogue.bnf.fr/ark:/12148/cb12228351v
description: Provenance: abbaye de Cîteaux
description: Provenance: http://www.wikidata.org/entity/Q843261
From the Monster to Majorana: a study of the 3A-axes
Creators: name: Lim, Chien Sheng
Publisher: name: Imperial College London
Year: 2017

description: The 3A-axes are one of four famous families of vectors which in union span the acclaimed Monster algebra. Existing in 4-dimensional subalgebras generated by a pair of 2A-axes, they are idempotents of length 8/5. Inside the Monster algebra, these idempotents have a special association with, and are indexed by the 3A-elements of the Monster. It is therefore paramount to understand these axes in order to further understand the Monster. This thesis sets out to uncover the many properties and profound consequences of the 3A-axes. We present three main accomplishments. The first is an axiomatic approach. Properties of the 3A-axes in the Monster algebra are first proven. These properties are then axiomatized as the definition of what we call a standard 3A-axis. The second is on the (2A,3A)-configurations. This is the study of subalgebras of the Monster algebra generated by a 2A- and 3A-axis. The algebra products between a 2A- and 3A-axis for three new cases are discovered. We also present the structures of several subalgebras generated by a 2A- and 3A-axis for the very first time. The third central result is the successful formulation of a methodology for determining all values of inner products between two 3A-axes contained in a very prominent Majorana algebra. There has been much interest especially in Majorana theory in this algebra associated with A12. The inner product classification achieved in this thesis contributes towards this open topic notably in the study of linear spans of axes.
Optical depth evaluation in pixel microlensing
Creators: name: Gondolo, Paolo
Publisher: name: arXiv
Year: 1998
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We propose an estimator of the microlensing optical depth from pixel lensing data that involves only measurable quantities. In comparison to the only previously proposed estimator, it has the advantage of not being limited to events with large magnification at maximum, and it applies equally well to satellite and ground-based observations.
description: 13 pages, 2 figures, Ap J Lett (accepted)
Observation of dynamical quantum phase transition by a superconducting qubit simulation
Creators: name: Guo, Xue-Yi
name: Yang, Chao
name: Zeng, Yu
name: Peng, Yi
name: Li, He-Kang
name: Deng, Hui
name: Jin, Yi-Rong
name: Chen, Shu
name: Zheng, Dongning
name: Fan, Heng
Publisher: name: arXiv
Year: 2018
Subjects: subject: Quantum Physics (quant-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: A dynamical quantum phase transition can occur during time evolution of sudden quenched quantum systems across a phase transition. It corresponds to the nonanalytic behavior at a critical time of the rate function of the quantum state return amplitude, analogous to nonanalyticity of the free energy density at the critical temperature in macroscopic systems. A variety of many-body systems can be represented in momentum space as a spin-1/2 state evolving on the Bloch sphere, where each momentum mode is decoupled and thus can be simulated independently by a single qubit. Here, we report the observation of a dynamical quantum phase transition in a superconducting qubit simulation of the quantum quench dynamics of many-body systems. We take the Ising model with a transverse field as an example for demonstration. In our experiment, the spin state, which is initially polarized longitudinally, evolves based on a Hamiltonian with adjustable parameters depending on the momentum and strength of the transverse magnetic field. The time evolving quantum state is read out by state tomography. Evidence of dynamical quantum phase transitions, such as paths of time evolution states on the Bloch sphere, non-analytic behavior of the dynamical free energy and the emergence of Skyrmion lattice in momentum-time space, is observed. The experimental data agrees well with theoretical and numerical calculations. The experiment demonstrates for the first time explicitly the topological invariant, both topologically trivial and non-trivial, for dynamical quantum phase transitions. Our results show that the quantum phase transitions of this class of many-body systems can be simulated successfully with a single qubit by varying certain control parameters over the corresponding momentum range.
description: 10 pages, 7 figures, typos corrected
Supplementary Figures and Tables from A non-coding region near Follistatin controls head colour polymorphism in Gouldian finch
Creators: name: Toomey, Matthew B.
name: Marques, Cristiana
name: Andrade, Pedro
name: Araújo, Pedro M.
name: Sabatino, Stephen
name: Małgorzata A. Gazda
name: Afonso, Sandra
name: Lopes, Ricardo J.
name: Corbo, Joseph C.
name: Carneiro, Miguel
Publisher: name: The Royal Society
Year: 2018
Subjects: subject: Genetics
subject: FOS: Biological sciences
subject: Evolutionary Biology
subject: 60408 Genomics

description: Includes 9 supplementary Figures and 7 supplementary Tables