cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Orbital-selective superconductivity in the nematic phase of FeSe
Creators: name: Hu, Haoyu
name: Yu, Rong
name: Nica, Emilian M.
name: Zhu, Jian-Xin
name: Si, Qimiao
Publisher: name: arXiv
Year: 2018
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The interplay between electronic orders and superconductivity is central to the physics of unconventional superconductors, and is particularly pronounced in the iron-based superconductors. Motivated by recent experiments on FeSe, we study the superconducting pairing in its nematic phase in a multiorbital model with frustrated spin-exchange interactions. The electron correlations in the presence of the nematic order give rise to an enhanced orbital selectivity in the superconducting pairing amplitudes. This orbital-selective pairing produces a large gap anisotropy on the Fermi surface. Our results naturally explain the striking experimental observations, and shed new light on the unconventional superconductivity of correlated electron systems in general.
description: Final version as published in PRB, Rapid Communications. 6 pages with 4 figures, plus supplementary material
Hermite polynomials and Fibonacci Oscillators
Creators: name: Marinho, Andre A.
name: Brito, Francisco A.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Theory (hep-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We compute the ($q_1,q_2$)-deformed Hermite polynomials by replacing the quantum harmonic oscillator problem to Fibonacci oscillators. We do this by applying the ($q_1, q_2$)-extension of Jackson derivative. The deformed energy spectrum is also found in terms of these parameters. We conclude that the deformation is more effective in higher excited states. We conjecture that this achievement may find applications in the inclusion of disorder and impurity in quantum systems. The ordinary quantum mechanics is easily recovered as $q_1 = 1$ and $q_2\to1$ or vice versa.
description: 15 pages, 4 figures; version to appear in Journal of Mathematical Physics
Phasianus gallus subsp. crispus Linnaeus, 1758, subspec. nov.
Creators: name: Linnaeus, Carolus
Publisher: name: Laurentius Salvius
Year: 1758
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Aves
Galliformes
Phasianidae
Phasianus
Phasianus gallus
Phasianus gallus subsp. crispus

description: Phasianus gallus subsp. crispus [subspec. nov.]
Gallina frislandica. Will. orn. 110.
Gallina crispa. Raj. av. 51. Aldr. orn. l. 14. p. 329.
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 158, DOI: 10.5962/bhl.title.542, http://zenodo.org/record/3922206
High-order mesh generation for CFD solvers
Creators: name: Turner, Michael
Publisher: name: Imperial College London
Year: 2017

description: The generation of curvilinear, high-order meshes for CFD applications remains a significant bottleneck in the progress and application of high-order CFD methods. These methods have superior numerical accuracy over low-order methods due to their use of piecewise polynomial representations of domains and solutions. As such they are viewed as a potential source of higher fidelity simulations with a view of industrial application [81]. The current state of the art in high-order mesh generation does not provide a reliable and efficient approach which would be required in an industrial setting. This thesis investigates the generation of high-order curvilinear meshes for CFD applications. It focuses around the design and algorithms of an open-source high- order mesh generator, NekMesh, which has been created as part of this project and is part of the Nektar++ high-order CFD suite. The program aims to create high-order meshes directly from CAD as automatically and robustly as possible. This means that all parts of the high-order meshing problem must be addressed including CAD handling and linear mesh generation. A significant contribution of this thesis to high-order mesh generation is the work on a variational approach to the generation of curved meshes. This has been encompassed in a framework within NekMesh. It has been shown to be able to apply several high-order mesh generation methods found throughout the literature and unify them in one context. In addition to this the algorithms used within this framework mitigate a significant amount of the high computational cost associated with high-order mesh generation and attempts to address robustness issues. In addition to the work on NekMesh this thesis also explores using a semi- structured approach to linear mesh generation which can address several robustness issues. It also applies several the methods created to industrially relevant examples.
The Evolution of Dust Opacity in Galaxies
Creators: name: Calzetti, D.
name: Heckman, T. M.
Publisher: name: arXiv
Year: 1998
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: (Abridged) We investigate the evolution of the opacity of galaxies as a function of redshift, using simple assumptions about the metal and dust enrichment of the gas and the distribution of dust in galaxies. We use an iterative procedure to reconstruct the intrinsic Star Formation Rate (SFR) density of galaxies with redshift, by applying dust obscuration corrections to the observed UV emission. The iterative procedure converges to multiple solutions for the intrinsic SFR density, divided into two basic classes. The first class of solutions predicts relatively large UV attenuation at high redshift, with A(1500 A)=1.9 mag at z~3, and smaller attenuations at z<1, with A(2800 A)=1.25 mag. The SFR density of this set of solutions is constant for z>~1.2 and declines for z<1.2; it resembles in shape the ``monolithic collapse'' scenario for star formation. The second class of solutions predicts relatively low UV attenuations at high redshift, with A(1500 A)=0.75 mag at z~3, and larger attenuations at z<1, with A(2800 A)=1.50 mag. The SFR density in this case has a peak at z~1.2. The advantages and shortcomings of both classes are analyzed in the light of available observational constraints, including the opacity of galaxies at 0
description: 54 pages, includes 1 embedded postscript Table and 22 embedded postscript Figures, Latex, uses AAS Latex macro. Accepted for publication in the Astrophysical Journal
Additional file 5: of Min-redundancy and max-relevance multi-view feature selection for predicting ovarian cancer survival using multi-omics data
Creators: name: EL-Manzalawy, Yasser
name: Tsung-Yu Hsieh
name: Shivakumar, Manu
name: Dokyoon Kim
name: Vasant Honavar
Publisher: name: figshare
Year: 2018
Subjects: subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Evolutionary Biology
subject: 69999 Biological Sciences not elsewhere classified
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences
subject: Developmental Biology

description: Graphical output of Multi-GOEAST analysis results of Molecular Function GO terms in the top selected genes in CNA and RNA-Seq. (PDF 58 kb)
On the Structure and Morphology of the `Diffuse Ionized Medium' in Star-Forming Galaxies
Creators: name: Wang, Jing
name: Heckman, Timothy
name: Lehnert, Matthew
Publisher: name: arXiv
Year: 1998
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Deep H$α$ images of a sample of nearby late-type spiral galaxies have been analyzed to characterize the morphology and energetic significance of the ``Diffuse Ionized Medium'' (DIM). We find that the DIM properties can be reasonably unified as a function of relative surface brightness, by using a new method to quantify the DIM importance in galaxies. This new approach is more consistent with the fundamentally morphological definition of the DIM as being `Diffuse', compared to the traditional way adopted in previous studies that could only isolate the DIM based on an absolute surface brightness criterion. Our results suggest that the variation of the DIM's significance among the galaxies is small enough so that the fractional contribution of the DIM to the global H$α$ luminosity in the galaxies is fairly constant, as has been observed. We found a smooth structural transition from HII regions to the DIM, suggesting that the ionizing energy for the DIM mainly comes from HII regions.
description: 30 pages, 12 figures, AASTeX style
Fuel-composition dependent reactor antineutrino yield at RENO
Creators: name: The RENO Collaboration
Publisher: name: arXiv
Year: 2018
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We report a fuel-dependent reactor electron antineutrino ($\overlineν_e$) yield using six 2.8 GW$_{\text{th}}$ reactors in the Hanbit nuclear power plant complex, Yonggwang, Korea. The analysis uses $850\,666$ $\overlineν_e$ candidate events with a background fraction of 2.0 % acquired through inverse beta decay (IBD) interactions in the near detector for 1807.9 live days from August 2011 to February 2018. Based on multiple fuel cycles, we observe a fuel $^{235}$U dependent variation of measured IBD yields with a slope of $(1.51 \pm 0.23) \times 10^{-43} $cm$^2$/fission and measure a total average IBD yield of $(5.84 \pm 0.13) \times 10^{-43} $cm$^2$/fission. The hypothesis of no fuel-dependent IBD yield is ruled out at 6.6 $σ$. The observed IBD yield variation over $^{235}$U isotope fraction does not show significant deviation from the Huber-Mueller (HM) prediction at 1.3 $σ$. The measured fuel-dependent variation determines IBD yields of $(6.15 \pm 0.19) \times 10^{-43} $cm$^2$/fission and $(4.18\pm 0.26) \times 10^{-43} $cm$^2$/fission for two dominant fuel isotopes $^{235}$U and $^{239}$Pu, respectively. The measured IBD yield per $^{235}$U fission shows the largest deficit relative to the HM prediction. Reevaluation of the $^{235}$U IBD yield per fission may mostly solve the Reactor Antineutrino Anomaly (RAA) while $^{239}$Pu is not completely ruled out as a possible contributor of the anomaly. We also report a 2.9 $σ$ correlation between the fractional change of the 5 MeV excess and the reactor fuel isotope fraction of $^{235}$U.
description: 6 pages and 5 figures, v4 note: (1) data files for figure 1, figure 2, figure 5 are included for arXiv users (2) minor modifications in abstract and main text for clarification
C. V. Vishveshwara (Vishu) On The Black Hole Trek
Creators: name: Dadhich, Naresh
name: Nayak, K Rajesh
Publisher: name: arXiv
Year: 2024
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: History and Philosophy of Physics (physics.hist-ph)
subject: FOS: Physical sciences

description: With his seminal and pioneering work on the stability of the Schwarzschild black hole and its interaction with gravitational radiation, Vishu had opened a new window on black hole astrophysics. One of the interesting results that soon followed was that "a black hole has no hair", it is entirely specified by the three parameters, mass, spin and charge, and nothing more. The discovery of gravitational waves in 2016 produced by merger of two black holes, and observed by the Ligo-Virgo collaboration, carried the definitive signature of quasi-normal modes, the phenomenon of black hole ringdown, exactly what Vishu had predicted in his 1970 Nature paper~(See Isaacson's commentary) 46 years ago. This was the crowning glory.
Phasianus gallus subsp. pusillus Linnaeus, 1758, subspec. nov.
Creators: name: Linnaeus, Carolus
Publisher: name: Laurentius Salvius
Year: 1758
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Aves
Galliformes
Phasianidae
Phasianus
Phasianus gallus
Phasianus gallus subsp. pusillus

description: Phasianus gallus subsp. pusillus [subspec. nov.]
Gallus tibiis pennatis.
Gallina bentamensis. Alb. av. 3. p. 33. t. 33. 34.
Habitat in India Orientali: Pouli candor, & c.
Gallus pugnax, superbus celsa crista, erecta falcataque cauda, vigil, plaudentibus lateribus canens gallicinia, salax 10. feminis sufficit. Gallina pulveratrix ova copiosa ponit, raro subventanea, nisi Capis associata; cibis expetita ova, caro, juscula galli senioris. Laeditur baccis Sambuci; a pediculis liberatur pipere.
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 158, DOI: 10.5962/bhl.title.542, http://zenodo.org/record/3922206
Linear mechanisms and pressure fluctuations in wall turbulence with passivity-based linear feedback control
Creators: name: Septham, Kamthon
Publisher: name: Imperial College London
Year: 2017

description: Full-domain, linear feedback control of turbulent channel flow at Re{_\tau} < 400 is an effective method to attenuate turbulent fluctuations such that it is relaminarised. The passivity-based control approach is adopted and motivated by the conservative characteristics of the nonlinear terms in the Navier-Stokes equations with respect to the disturbance energy. The control acts on the wall-normal velocity fluctuations at low wavenumbers. The maximum spanwise wavelength that can be used without losing control is constant with Reynolds number at {\lambda_z^+} = 125. In the minimal flow unit at Re_{cl} = 5000, the maximum streamwise wavelength is {\lambda_x^+} = 1000. The effect of control on the pressure components is investigated via the Green's function approach. Only the spanwise spectra of p_{r} up to the designated controlled spanwise wavenumber k_{z} are effectively suppressed by the linear control. This indicates that the linear control operates via vdU/dy and thus acts on the pressure field via the linear ("rapid") source term of the Poisson equation for pressure fluctuations, 2(dU/dy)(dv/dx). The effectiveness of the linear control to suppress inherently nonlinear wall turbulence is explained by Landahl's theory of timescales, in that the linear control proceeds via the linear shear-interaction timescale which is significantly shorter than both the nonlinear and viscous timescales for turbulence. The linear shear-interaction timescale is effective as a result of the linear ("rapid") source term. The maximum control forcing is located at y^+ = 20, corresponding to the location of the maximum in the mean-square pressure gradient. The existence of Landahl's timescales in the near-wall region of the minimal flow unit at Re_{cl} = 5000 is confirmed. The dynamic mode decomposition (DMD) indicates that the linear operator is stable via the linear control. The application of DMD to nonlinear systems should be used with caution.
A Digital Twin Approach to Noise Exposure Modelling and Risk Analysis
Creators: name: Hamzah, Nurhasnita
Publisher: name: Zenodo
Year: 2025

description: Generate or import the field

Constructs a grid_size × grid_size mesh on 0,10,1² (X, Y) and builds a test field

In practice you’d replace the synthetic u_pred_2d = sin(2πX)⋅cos(2πY) with your PINN‐ or digital-twin output

Segment the field into discrete regions A–E

Applies five tunable thresholds (e.g. u < –0.5 ⇒ “A”, –0.5 ≤ u < –0.2 ⇒ “B”, …, u ≥ 0.5 ⇒ “E”)

Stores both a character array segmentation and an integer map region_numeric

Define and classify a worker trajectory

Creates a straight‐line path of 250 points from (0.05,0.05) to (0.95,0.95)

Maps each path point back onto the grid to pick up its region label

Visualize via a mosaic of subplots

Uses Matplotlib’s subplot_mosaic to lay out regions A–E in a 2 × 3 grid (one cell unused)

In each panel, masks out all but the current region and displays the field values with imshow

Overlays the worker’s points that fall into that region as black dots, with individual colorbars

(Optional) Log the worker’s exposure

Iterates through each time step (here mapped linearly to 0–60 min)

Prints a table of time, position, and region - ready for extension to actual dose/exposure calculations
Additional file 4: of Min-redundancy and max-relevance multi-view feature selection for predicting ovarian cancer survival using multi-omics data
Creators: name: EL-Manzalawy, Yasser
name: Tsung-Yu Hsieh
name: Shivakumar, Manu
name: Dokyoon Kim
name: Vasant Honavar
Publisher: name: figshare
Year: 2018
Subjects: subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: 69999 Biological Sciences not elsewhere classified
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences

description: Graphical output of Multi-GOEAST analysis results of Cellular Components GO terms in the top selected genes in CNA and RNA-Seq. (PDF 56 kb)
Pattern invariance for reaction-diffusion systems on complex networks
Creators: name: Cencetti, Giulia
name: Clusella, Pau
name: Fanelli, Duccio
Publisher: name: arXiv
Year: 2018
Subjects: subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: Given a reaction-diffusion system interacting via a complex network, we propose two different techniques to modify the network topology while preserving its dynamical behaviour. In the region of parameters where the homogeneous solution gets spontaneously destabilized, perturbations grow along the unstable directions made available across the networks of connections, yielding irregular spatio-temporal patterns. We exploit the spectral properties of the Laplacian operator associated to the graph in order to modify its topology, while preserving the unstable manifold of the underlying equilibrium. The new network is isodynamic to the former, meaning that it reproduces the dynamical response (pattern) to a perturbation, as displayed by the original system. The first method acts directly on the eigenmodes, thus resulting in a general redistribution of link weights which, in some cases, can completely change the structure of the original network. The second method uses localization properties of the eigenvectors to identify and randomize a subnetwork that is mostly embedded only into the stable manifold. We test both techniques on different network topologies using the Ginzburg-Landau system as a reference model. Whereas the correlation between patterns on isodynamic networks generated via the first recipe is larger, the second method allows for a finer control at the level of single nodes. This work opens up a new perspective on the multiple possibilities for identifying the family of discrete supports that instigate equivalent dynamical responses on a multispecies reaction-diffusion system.
title: ADCO, Grènetier de Cîteaux : comptes (1497-1504) (11 H 1172), f. 00383
Creators: name: de la Côte-d'Or, Archives départementales
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: LaMOP
subject: Laboratoire de Médiévistique Occidentale de Paris
subject: Corpus Burgundiae Medii Aevi
subject: Chartes de la Bourgogne du Moyen Âge
subject: comptes

description: Grènetier de Cîteaux : comptes (1497-1504), Archives départementales de la Côte-d'Or, (11 H 1172). Numérisation en mode image.
description: Relation: http://www.cbma-project.eu/
description: Bibliographic citation: Grènetier de Cîteaux : comptes (1497-1504), Archives départementales de la Côte-d'Or, (11 H 1172), f. 00383, 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
Uncertainty in exhaust emissions from passenger cars; a policy perspective
Creators: name: O'Driscoll, Rosalind
Publisher: name: Imperial College London
Year: 2017

description: In Europe the regulations that limit vehicle emissions, the Euro Standards, have failed to effectively tackle pollutant emissions in the real world. This thesis contains an appraisal of the real world emissions of modern European vehicles, which were identified as a major cause of uncertainty in UK policy with respect to compliance with air pollution legislation. The thesis includes key background information on air pollution and its control in the UK and a comprehensive review of the existing literature relating to real world emissions of petrol and diesel passenger cars. The real world emissions performance of modern vehicles was assessed using Portable Emissions Measurement System (PEMS) data, provided by Emissions Analytics, which included 147 Euro 5 and 6 diesel and petrol vehicles. Comparisons were made to the emissions factors of the recommended air quality transport model of the European Union, COPERT, as well as the Euro standard type approval limits. The potential impact of these real world emissions was also assessed using the UK Integrated Assessment Model to perform scenario analysis up to 2030. Scenarios were used to explore the potential effect of different passenger car emissions factors on total UK NOx (nitrogen oxides) and CO2 (carbon dioxide) emissions, damage costs and annual mean concentrations of nitrogen dioxide (NO2). Considering the results of these investigations, wider conclusions were drawn as to how policy makers might effectively reduce passenger car related pollution in European towns and cities. A key conclusion of this thesis is that due to the large variability in the real world emissions of vehicles within a single Euro class, policies could be more effect if real world variability was taken into account, as opposed to relying solely on the Euro standard.
Indoles as gut microbial pharmaco-metabolites: targets, mechanisms and consequences for obesity and cardiometabolic diseases
Creators: name: Fernandes Neves Soares, Ana Luísa
Publisher: name: Imperial College London
Year: 2017

description: The gut microbiota play a pivotal role in the onset and development of obesity and cardiometabolic disorders. Obese subjects exhibit significant gut microbial changes, including enrichment for bacterial genes associated with the degradation of tryptophan, which is converted by gut bacteria into indoles. Indoles act as signalling molecules in the microbial-mammalian crosstalk; however, their human targets and mechanisms are not fully understood. In particular, the human kinome remains an unexplored repertoire. The overall hypothesis of this work is that indoles bind human kinases, impact signalling pathways and interfere with cellular processes relevant for obesity and cardiometabolic diseases, thus acting as chemical messengers in the microbiomekinome crosstalk. Gut microbial degradation of tryptophan converges to the production of indoxyl sulfate and indole-3-acetate. Using 1H NMR profiling, indoxyl sulfate was found to be positively correlated with adiposity and plasma levels of leptin; its effect was further confirmed i n vitro , where it increased both lipid accumulation and leptin production. A high-throughput kinase screening revealed that indoxyl sulfate has kinome-wide effects and was subjected to a network analysis to connect its proadipogenic effect. Kinase screening and molecular docking analysis suggest that another indolic compound, indole-3-acetate, inhibits VEGFR-2 - a kinase-linked receptor essential for angiogenesis and involved in several cardiometabolic disorders ( e.g. atherosclerosis, diabetes, and hypertension). This inhibition was validated in vitro by demonstrating that indole-3-acetate reduces the phosphorylation of VEGFR-2 and downstream AKT signalling in endothelial cells. Consistently, indole-3-acetate inhibited endothelial cell migration and tube formation, which are required for angiogenesis i n v i t r o , and decreased vascular network formation in an i n v i v o angiogenesis model. Altogether, this study unravels a unique microbiome-kinome crosstalk by demonstrating that specific gut microbiota-generated indoles can impact adipogenesis (indoxyl sulfate) and angiogenesis (indole-3-acetate), two key processes in obesity and cardiometabolic disorders.
Mass function of dormant black holes and the evolution of the Active Galactic Nuclei
Creators: name: Salucci, Paolo
name: Szuszkiewicz, Ewa
name: Monaco, Pierluigi
name: Danese, Luigi
Publisher: name: arXiv
Year: 1998
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We derive the mass function of the relic black holes and compared with that of the Massive Dark Objects in galaxies. Under the assumption that accretion onto massive BH's powers the Active Galactic Nuclei, the mass function of the BH responsibile for the past activity of QSO/AGN is computed. Our results support the scenario in which the QSO phase has exclusively occurred in every proto-elliptical.
description: 10 pages, 8 Figures. Version improved with referee comments. J. Accepted on MNRAS
Phasianus meleagris Linnaeus, 1758, spec. nov.
Creators: name: Linnaeus, Carolus
Publisher: name: Laurentius Salvius
Year: 1758
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Aves
Galliformes
Phasianidae
Phasianus
Phasianus meleagris

description: Phasianus meleagris [spec. nov.]
P. vertice calloso, temporibus carunculatis.
Gallina vertice corneo. Hasselqv. iter. 274.
Gallus vertice corneo. Syst. nat. 28.
Gallina guinea. Worm. mus. 297.
Gallina africana. Marcgr. bras. 78.
Gallus niger, maculis ovalibus & orbiculatis. Barr. av. 79. *
Gallina guineenfis. Worm. mus. 297. t. 297. Olear. mus.. t. 15. f. 3. Raj. av. 52. Alb. av. 2. p. 32. t. 35. Will. orn. 162. t. 26. Aldr. av. l. 14. c. 13.
Habitat in Africa.
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 158, DOI: 10.5962/bhl.title.542, http://zenodo.org/record/3922206
Could primordial galactic Magnetic Fields be generated by Charged Ultra-Light Boson Dark Matter?
Creators: name: Hernandez, M.
name: Avilez-Lopez, A.
name: Matos, T.
Publisher: name: arXiv
Year: 2018
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In this work we study the possibility that primordial magnetic fields observed in galaxies could be produced by a dark matter halo made of charged ultra-light bosons. In the model, we assume that ultra-light bosons arise as excitations of a complex scalar field described by the Klein-Gordon equation with local $U(1)$ symmetry which introduces electromagnetic fields that minimally couple to the complex scalar current. We use classical solutions of the Klein-Gordon-Maxwell system to describe the density profile of dark matter and magnetic fields in the galaxies. We consider two cases assuming spherical and dipolar spatial symmetries respectively. For the particular case of the LSB spherical galaxy F563, we test the sensitivity of the predicted rotation curves in the charged scalar field dark matter (cSFDM) model to variations of the electromagnetic coupling and, by using the Fisher matrix error estimator, we set a constraint over that coupling by requiring that theoretical rotation curves lay inside the $1σ$ confidence region of observational data . We find that cSFDM haloes are able to generate magnetic fields of the order of $μG$ and reproduce the observed rotation curves of F563-V2 at the same time if the ultra-light boson has a charge lower than $\sim 10^{-13}e$ for the monopole-like density profile and lower than $10^{-14}e$ for the dipole-like one.
description: 15 pages, 5 figures. Submitted to JCAP
X-ray spectral evolution of GS 2023+338 (V404 Cyg) during decline after outburst
Creators: name: Zycki, P.
name: Done, C.
name: Smith, D.
Publisher: name: arXiv
Year: 1998
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We have re-analyzed archival GINGA data of the soft X-ray transient source GS2023+308 (V404 Cyg) covering the decline phase of its May 1989 outburst. Our spectral modelling includes the relativistically smeared Compton reflected continuum and iron Kαfluorescent line near 6.5 keV produced by X-ray illumination of the accretion disc. This gives a powerful diagnostic of the accretion geometry, with the amplitude of the reprocessed components showing the solid angle subtended by the disc, while the detailed shape of the relativistic smearing shows how close this material is to the black hole event horizon. We find that reflection is always significantly present in the spectra, but that its fractional contribution decreases as the decline progresses. The amount of relativistic smearing is also consistent with decreasing during the decline, although this is poorly constrained except for the brightest spectra. One plausible scenario explaining this evolution is of an optically thick disc with inner radius increasing as a function of time, with the X-ray source in the form of a central corona. This is similar to the evolution inferred for other X-ray transient sources, such as Nova Muscae, except that the underlying power law spectrum of GS 2023+338 stayed constant as the disc geometry changed. This challenges the underlying assumption of almost all models for the spectra of accreting black holes, namely that the hard X-rays are formed by Comptonization of seed photons from the accretion disc.
description: 11 pages, uses mn.sty, submitted to MNRAS, revised
Bayesian Deep Learning on a Quantum Computer
Creators: name: Zhao, Zhikuan
name: Pozas-Kerstjens, Alejandro
name: Rebentrost, Patrick
name: Wittek, Peter
Publisher: name: arXiv
Year: 2018
Subjects: subject: Quantum Physics (quant-ph)
subject: Artificial Intelligence (cs.AI)
subject: Machine Learning (stat.ML)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Bayesian methods in machine learning, such as Gaussian processes, have great advantages com-pared to other techniques. In particular, they provide estimates of the uncertainty associated with a prediction. Extending the Bayesian approach to deep architectures has remained a major challenge. Recent results connected deep feedforward neural networks with Gaussian processes, allowing training without backpropagation. This connection enables us to leverage a quantum algorithm designed for Gaussian processes and develop a new algorithm for Bayesian deep learning on quantum computers. The properties of the kernel matrix in the Gaussian process ensure the efficient execution of the core component of the protocol, quantum matrix inversion, providing an at least polynomial speedup over classical algorithms. Furthermore, we demonstrate the execution of the algorithm on contemporary quantum computers and analyze its robustness with respect to realistic noise models.
description: 11 pages, 3 figures. RevTeX 4.1. Code is available at https://gitlab.com/apozas/bayesian-dl-quantum/ V3: Updated to match published version
Five sample joint neutrino/antineutrino oscillation analysis in T2K
Creators: name: Ma, Wing Yan
Publisher: name: Imperial College London
Year: 2017

description: This thesis describes a simultaneous fit to all five of the far detector oscillation samples analysed to date (FHC/RHC 1Rmu, FHC/RHC 1Re and FHC nue CC1pi+) using T2K data taken from 2009-2017 with \sci{1.47}{21}~POT in neutrino mode and \sci{0.76}{21}~POT in antineutrino mode. The aim of this analysis is to search for CP violation by setting limits on \dcp and measure the oscillation parameters \sonethree, \stwothree and \Dm232. The T2K (Tokai to Kamioka) experiment is a long-baseline accelerator neutrino oscillation experiment that is designed to make precision measurements of neutrino oscillation by observing numu disappearance and nue appearance. A numu beam is produced using a 30 GeV proton beam at the J-PARC and is detected by the near detector complex, ND280, and by the far detector, Super-Kamiokande, which is 295 km away from J-PARC. The far detector and one of the near detectors are located in an off-axis direction to the neutrino beam centre, resulting a narrow neutrino energy peak of 0.6 GeV and where the numu survival probability is expected to be minimal (or maximal nue appearance probability). The neutrino fluxes and their uncertainties at the near and far detector are predicted by the Monte Carlo simulation tuned with data from external hadron production experiments. The uncertainties of the neutrino flux parameters and certain neutrino interactions parameters at the far detector are reduced by the measurement at the off-axis near detector. Since the last analysis there has been improvement to event reconstructions at SK which results in 20% increase in nue increased purity in the 1R muon samples. Using data taken from 2009-2017, we observed 240 mu-like, 74 e-like, 15 nue CC1pi+ -like events in neutrino mode, and 68 mu-like, 7 e-like events in antineutrino mode. The best-fit oscillation parameter values for the T2K only fit are $\mathrm{sin}^2\theta_{13} = 0.0296^{+0.0066}_{-0.0052}$, $\mathrm{sin}^2\theta_{23} = 0.511^{+0.036}_{-0.032}$, $|\Delta m^2| = 2.458^{+0.058}_{-0.059}\times10^{-3}\mathrm{eV}^2$ and $\delta_{CP} = -1.72^{+1.04}_{-0.92}$. The best-fit oscillation parameter values including a reactor constraint on \sonethree are $\mathrm{sin}^2\theta_{13} = 0.0224\pm0.0012$, $\mathrm{sin}^2\theta_{23} = 0.530^{+0.028}_{-0.034}$, $|\Delta m^2| = 2.462^{+0.059}_{-0.057}\times10^{-3}\mathrm{eV}^2$ and $\delta_{CP} = -1.64\pm0.62$. These results are quoted from credible intervals presented in the result section. Confidence intervals for delta CP are produced using the Feldman-Cousins method, and confidence intervals of the other oscillation parameters are produced using the constant delta chi square method. The best-fit oscillation parameter values are found to be consistent with previous official results while giving tighter constraints. There is a first indication of CP conservation in neutrino sector excluded at 2 sigma level. The results are also presented showing the correlations that exist between the oscillation parameters.
Exactly solvable model for transmission line with artificial dispersion
Creators: name: Shvartsburg, A. B.
name: Artekha, S. N.
name: Artekha, N. S.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Applied Physics (physics.app-ph)
subject: Mathematical Physics (math-ph)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences

description: The problem of the emergence of wave dispersion due to the heterogeneity of a transmission line (TL) is considered. An exactly solvable model helps to better understand the physical process of a signal passing through a non-uniform section of the line and to compare the exact solution and solutions obtained using various approximate methods. Based on the transition to new variables, the developed approach made it possible to construct exact analytical solutions of telegraph equations with a continuous distribution of parameters, which depend on the coordinate. The flexibility of the discussed model is due to the presence of a number of free parameters, including two geometric factors characterizing the lengths of inhomogeneities in values of the inductance L and of the capacitance C. In the new variables, the spatiotemporal structure of the solutions is described using sine waves and elementary functions, and the dispersion is determined by the formulas of the waveguide type. The dispersive waveguide-like structure characterized by refractive index N and cut-off frequency $Ω$. The exact expressions for the complex reflection and transmission coefficients are derived. These expressions describe phase shifts for reflected and transmitted waves. The following interesting cases are analyzed: the passage of waves without phase change, the reflectionless passage of waves, and the passage of signals through a sequence of non-uniform sections. The developed mathematical formalism can be useful for the analysis of a wider range of problems.
description: 20 pages, 10 figures
Additional file 3: of Min-redundancy and max-relevance multi-view feature selection for predicting ovarian cancer survival using multi-omics data
Creators: name: EL-Manzalawy, Yasser
name: Tsung-Yu Hsieh
name: Shivakumar, Manu
name: Dokyoon Kim
name: Vasant Honavar
Publisher: name: figshare
Year: 2018
Subjects: subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Evolutionary Biology
subject: 69999 Biological Sciences not elsewhere classified
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences

description: Graphical output of Multi-GOEAST analysis results of Biological Processes GO terms in the top selected genes in CNA and RNA-Seq. (PDF 110 kb)
Hardware architectures for machine learning training
Creators: name: Shao, Shengjia
Publisher: name: Imperial College London
Year: 2018

description: Machine learning applications are computationally expensive, but they can benefit from hardware acceleration. In recent years, there has been substantial research on accelerating the inference stage of machine learning models, but the work on the training stage has been limited. This thesis explores the hardware acceleration of the training stage of machine learning models. Specifically, this thesis makes the following three contributions. The first contribution of this thesis is incremental and decremental training of Support Vector Regression (SVR). At the algorithm level, we handle the boundary case ignored by existing algorithms to ensure correctness. At the hardware level, we design an efficient hardware architecture that circumvents algorithmic obstacles. FPGA implementation of the proposed SVR training scheme is evaluated with high frequency financial data. Significant speed-up is achieved using our FPGA-based system over CPU and GPU. The second contribution of this thesis is the hardware architecture for Trust Region Policy Optimisation (TRPO), an advanced Reinforcement Learning algorithm. The main novelty is the use of Pearlmutter Propagation to circumvent algorithm level obstacles in order to enable a streamlined hardware implementation. The proposed hardware architecture implemented on FPGA is evaluated with robotic control benchmarks. It achieves significant speed-up against machine learning libraries running on CPU and GPU. The third contribution of this thesis is the application of hardware accelerated TRPO training to real robotic control. We propose a workflow of training the controller in simulation with TRPO then port it to the real robot. In addition to the hardware accelerated TRPO, a Customised Lightweight Simulator running on FPGA significantly speeds up the simulation process. The workflow is applied to a real robot arm. Several experiments are performed to illustrate the effectiveness of the proposed workflow in controlling a real robot arm.
title: ADCO, Cartulaire général de Cîteaux, dit de Jean de Cirey, (XVe siècle), tome I, Cart. 185 (11 H 70), f. 0018r
Creators: name: de la Côte d'Or, Archives départementales
name: Projet CBMA
name: CG21/F.PETOT/2012
name: Archives Départementales De La Côte-D'Or
name: Petot, Frédérique
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2020
Subjects: subject: cartulaire
subject: Corpus Burgundiae Medii Aevi
subject: Chartes de la Bourgogne du Moyen Âge
subject: LaMOP
subject: Laboratoire de Médiévistique Occidentale de Paris

description: Cartulaire général de Cîteaux, dit de Jean de Cirey, (XVe siècle), tome I, Archives départementales de la Côte-d'Or, Cart. 185 (11 H 70), f. 0018r, Numérisation en mode image.
description: Relation: http://www.cbma-project.eu/
description: Bibliographic citation: Cartulaire général de Cîteaux, dit de Jean de Cirey, (XVe siècle), tome I, Archives départementales de la Côte-d'Or, Cart. 185 (11 H 70), f. 0018r, 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
mpd_BIK_2011_2016
Creators: name: Batubara, Mario
Publisher: name: figshare
Year: 2018
Subjects: subject: 20199 Astronomical and Space Sciences not elsewhere classified
subject: FOS: Physical sciences
subject: 20107 Mesospheric, Ionospheric and Magnetospheric Physics

description: the data cover equatorial region in indonesia.
The Lyman Continuum Escape Survey: Ionizing Radiation from [O III]-Strong Sources at a Redshift of 3.1
Creators: name: Fletcher, Thomas J.
name: Tang, Mengtao
name: Robertson, Brant E.
name: Nakajima, Kimihiko
name: Ellis, Richard S.
name: Stark, Daniel P.
name: Inoue, Akio
Publisher: name: arXiv
Year: 2018
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present results from the LymAn Continuum Escape Survey (LACES), a Hubble Space Telescope (HST) program designed to characterize the ionizing radiation emerging from a sample of Lyman alpha emitting galaxies at redshift $z\simeq 3.1$. As many show intense [O III] emission characteristic of $z>6.5$ star-forming galaxies, they may represent valuable low redshift analogs of galaxies in the reionization era. Using HST Wide Field Camera 3 / UVIS $F336W$ to image Lyman continuum emission, we investigate the escape fraction of ionizing photons in this sample. For 61 sources, of which 77% are spectroscopically confirmed and 53 have measures of [O III] emission, we detect Lyman continuum leakage in 20%, a rate significantly higher than is seen in individual continuum-selected Lyman break galaxies. We estimate there is a 98% probability that $\leq 2$ of our detections could be affected by foreground contamination. Fitting multi-band spectral energy distributions (SEDs) to take account of the varying stellar populations, dust extinctions and metallicities, we derive individual Lyman continuum escape fractions corrected for foreground intergalactic absorption. We find escape fractions of 15 to 60% for individual objects, and infer an average 20% escape fraction by fitting composite SEDs for our detected samples. Surprisingly however, even a deep stack of those sources with no individual $F336W$ detections provides a stringent upper limit on the average escape fraction of less than 0.5%. We examine various correlations with source properties and discuss the implications in the context of the popular picture that cosmic reionization is driven by such compact, low metallicity star-forming galaxies.
description: 26 pages, 16 figures, accepted for publication in ApJ
Transformation of the extended Gamma function $Γ^{2,0}_{0,2}[(b,x)]$ with applications to astrophysical thermonuclear functions
Creators: name: Chaudhry, M. Aslam
Publisher: name: arXiv
Year: 1998
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Two representations of the extended gamma functions $Γ^{2,0}_{0,2}[(b,x)]$ are proved. These representations are exploited to find a transformation relation between two Fox's $H$-functions. These results are used to solve Fox's $H$-function in terms of Meijer's $G$-function for certain values of the parameters. A closed form representation of the kernel of the Bessel type integral transform is also proved.
description: 9 pages, LaTeX, submitted to Astrophys. Space Sci
Performance of hybrid quantum/classical variational heuristics for combinatorial optimization
Creators: name: Nannicini, Giacomo
Publisher: name: arXiv
Year: 2018
Subjects: subject: Quantum Physics (quant-ph)
subject: Discrete Mathematics (cs.DM)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences
subject: 90C27

description: The recent literature on near-term applications for quantum computers contains several examples of the applications of hybrid quantum/classical variational approaches. This methodology can be applied to a variety of optimization problems, but its practical performance is not well studied yet. This paper moves some steps in the direction of characterizing the practical performance of the methodology, in the context of finding solutions to classical combinatorial optimization problems. Our study is based on numerical results obtained applying several classical nonlinear optimization algorithms to Hamiltonians for six combinatorial optimization problems; the experiments are conducted via noise-free classical simulation of the quantum circuits implemented in Qiskit. We empirically verify that: (1) finding the ground state is harder for Hamiltonians with many Pauli terms; (2) classical global optimization methods are more successful than local methods due to their ability of avoiding the numerous local optima; (3) there does not seem to be a clear advantage in introducing entanglement in the variational form.
description: Additional experiments to quantify the effect of entanglement, or lack thereof
Limits of Quantum Graph Operators With Shrinking Edges
Creators: name: Berkolaiko, Gregory
name: Latushkin, Yuri
name: Sukhtaiev, Selim
Publisher: name: arXiv
Year: 2018
Subjects: subject: Spectral Theory (math.SP)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 35P15, 34B09, 34B24, 34B45, 53D12, 47E05

description: We address the question of convergence of Schrödinger operators on metric graphs with general self-adjoint vertex conditions as lengths of some of graph's edges shrink to zero. We determine the limiting operator and study convergence in a suitable norm resolvent sense. It is noteworthy that, as edge lengths tend to zero, standard Sobolev-type estimates break down, making convergence fail for some graphs. We use a combination of functional-analytic bounds on the edges of the graph and Lagrangian geometry considerations for the vertex conditions to establish a sufficient condition for convergence. This condition encodes an intricate balance between the topology of the graph and its vertex data. In particular, it does not depend on the potential, on the differences in the rates of convergence of the shrinking edges, or on the lengths of the unaffected edges.
Results from the CASTLES Survey of Gravitational Lenses
Creators: name: Kochanek, C. S.
name: Falco, E. E.
name: Impey, C. D.
name: Lehar, J.
name: McLeod, B. A.
name: Rix, H. -W.
Publisher: name: arXiv
Year: 1998
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We show that most gravitational lenses lie on the passively evolving fundamental plane for early-type galaxies. For burst star formation models (1 Gyr of star formation, then quiescence) in low Omega_0 cosmologies, the stellar populations of the lens galaxies must have formed at z_f > 2. Typical lens galaxies contain modest amounts of patchy extinction, with a median differential extinction for the optical (radio) selected lenses of E(B-V) = 0.04 (0.07) mag. The dust can be used to determine both extinction laws and lens redshifts. For example, the z_l=0.96 elliptical lens in MG0414+0534 has an R_V=1.7 +/- 0.1 mean extinction law. Arc and ring images of the quasar and AGN source host galaxies are commonly seen in NICMOS H band observations. The hosts are typically blue, L < L_* galaxies.
description: 12 pages, 10 figures, from Proceedings of the 9th Annual Astrophysics Conference in Maryland, After the Dark Ages: When Galaxies Were Young