cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
C$_{60}^+$ and the Diffuse Interstellar Bands: An Independent Laboratory Check
Creators: name: Spieler, Steffen
name: Kuhn, Martin
name: Postler, Johannes
name: Simpson, Malcolm
name: Wester, Roland
name: Scheier, Paul
name: Ubachs, Wim
name: Bacalla, Xavier
name: Bouwman, Jordy
name: Linnartz, Harold
Publisher: name: arXiv
Year: 2017
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: In 2015, Campbell et al. (Nature 523, 322) presented spectroscopic laboratory gas phase data for the fullerene cation, C$_{60}^+$, that coincide with reported astronomical spectra of two diffuse interstellar band (DIB) features at 9633 and 9578 Å. In the following year additional laboratory spectra were linked to three other and weaker DIBs at 9428, 9366, and 9349 Å. The laboratory data were obtained using wavelength-dependent photodissociation spectroscopy of small (up to three) He-tagged C$_{60}^+-$He$_n$ ion complexes, yielding rest wavelengths for the bare C$_{60}^+$ cation by correcting for the He-induced wavelength shifts. Here we present an alternative approach to derive the rest wavelengths of the four most prominent C$_{60}^+$ absorption features, using high resolution laser dissociation spectroscopy of C$_{60}^+$ embedded in ultracold He droplets. Accurate wavelengths of the bare fullerene cation are derived based on linear wavelength shifts recorded for He$_n$C$_{60}^+$ species with $n$ up to 32. A careful analysis of all available data results in precise rest wavelengths (in air) for the four most prominent C$_{60}^+$ bands: 9631.9(1) Å, 9576.7(1) Å, 9427.5(1) Å, and 9364.9(1) Å. The corresponding band widths have been derived and the relative band intensity ratios are discussed.
A collection of stories from Cornwall
Creators: name: Project Team, Their Finest Hour
Publisher: name: University of Oxford
Year: 2024
Subjects: classificationCode: 430304
subject: British history
classificationCode: 430308
subject: European history (excl. British, classical Greek and Roman)
classificationCode: 430316
subject: International history

description: A selection of about a dozen WWII stories from various people. They are all from, or lived in, Cornwall. They are all dead by now. I collected them about 15 years ago. Most were in their eighties at that time.
Experiences of Arthur and Walter Booth in WWII
Creators: name: Project Team, Their Finest Hour
Publisher: name: University of Oxford
Year: 2024
Subjects: classificationCode: 430304
subject: British history
classificationCode: 430308
subject: European history (excl. British, classical Greek and Roman)
classificationCode: 430316
subject: International history

description: During lockdown I decided to write down memories to go with the family photos I had inherited. I called these 'Fragments'. These soon expanded into more focused research.
The Environment of Lyman a Absorbers in the Sightline toward 3C273
Creators: name: Morris, S. L.
name: Weymann, R. J.
name: Dressler, Alan
name: McCarthy, P. J.
name: Smith, B. A.
name: Terrile, R. J.
name: Gionvanelli, R.
name: Irwin, M.
Publisher: name: arXiv
Year: 1993
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present new ground-based data following up on the HST discovery of low-redshift Lya absorption in the sight-line to the quasar 3C273. Narrow-band filter observations show that there are no H II regions within a 12 kpc radius of the line-of-sight to the quasar, at the velocities of three of the absorbers. Broad-band imaging shows that there are no dwarf galaxies at Virgo distances with absolute magnitude above MB~-13.5 and within a radius of 40 kpc. We present fiber spectroscopy of galaxies within a radius of 1 deg, down to an apparent magnitude of B~19. We show that the absorbers are definitely not distributed at random with respect to the galaxies, but also that the absorber-galaxy correlation function is not as strong as the galaxy-galaxy correlation function on large scales. Our data are consistent with the hypothesis that all galaxies more luminous than 1/10 L* have effective cross-sections (for association with absorbers with Log(NH)>13.0), of between 0.5 and 1 Mpc. We also show a clear case of a Lya absorber which has no galaxy brighter than MB=-18 within a projected distance of 4.8 Mpc, and discuss the possibility that Lya absorbers are destroyed in a rich galaxy environment.
description: 36 pages, AAS LaTeX v3.0, (postscript version of paper, tables and 5 figures and 3 half-tones available by anon ftp) IOA-93-01
Bayesian statistical modelling of microcanonical melting times at the superheated regime
Creators: name: Davis, Sergio
name: Loyola, Claudia
name: Peralta, Joaquín
Publisher: name: arXiv
Year: 2017
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Homogeneous melting of superheated crystals at constant energy is a dynamical process, believed to be triggered by the accumulation of thermal vacancies and their self-diffusion. From microcanonical simulations we know that if an ideal crystal is prepared at a given kinetic energy, it takes a random time $t_w$ until the melting mechanism is actually triggered. In this work we have studied in detail the statistics of $t_w$ for melting at different energies by performing a large number of Z-method simulations and applying state-of-the-art methods of Bayesian statistical inference. By focusing on the short-time tail of the distribution function, we show that $t_w$ is actually gamma-distributed rather than exponential (as asserted in previous work), with decreasing probability near $t_w \sim 0$. We also explicitly incorporate in our model the unavoidable truncation of the distribution function due to the limited total time span of a Z method simulation. The probabilistic model presented in this work can provide some insight into the dynamical nature of the homogeneous melting process, as well as giving a well-defined practical procedure to incorporate melting times from simulation into the Z-method in order to reduce the uncertainty in the melting temperature.
Dynamically Generated Open and Hidden Charm Meson Systems
Creators: name: Gamermann, D.
name: Oset, E.
name: Strottman, D.
name: Vacas, M. J. Vicente
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We will study open and hidden charm scalar meson resonances within two different models. The first one is a direct application of a chiral Lagrangian already used to study flavor symmetry breaking in Skyrme models. In another approach to the problem a SU(4) symmetric Lagrangian is built and the symmetry is broken down to SU(3) by identifying currents where heavy mesons are exchanged and suppressing those. Unitarization in couple channels leads to dynamical generation of resonances in both models, in particular a new hidden charm resonance with mass 3.7 GeV is predicted. The small differences between these models and with previous works will be discussed.
description: 32 pages, 10 figures. Added extra calculations with explicit symmetry breaking terms in chiral Lagrangians
Frank Thomas Morgan - my uncle
Creators: name: Project Team, Their Finest Hour
Publisher: name: University of Oxford
Year: 2024
Subjects: classificationCode: 430304
subject: British history
classificationCode: 430308
subject: European history (excl. British, classical Greek and Roman)
classificationCode: 430316
subject: International history

description: Frank Morgan was called up in 1941. He and his brother Leonard worked for the Gas Board, which, for the first year of the war, was a "protected occupation". He joined the Royal Engineers, and Leonard was enlisted with the Royal Artillery. Frank was at El Alamein, where he and his unit were tasked with clearing the landmines and widening the track so that the tanks could go through the minefield.One night, they drove into the darkness in a lorry and stopped along the track. Sgt. Weller told Frank and some others to jump out and start work, as they had done mine-detection before. Sgt. Weller ordered the truck to go a couple of hundred yards farther on with those who had not done mine-detection before. Tragically, the lorry drove over a landmine, and all still on board were killed.Twice—on the 25th and the 50th anniversary—Frank went back to El Alamein to take part in the commemorative service there. He never forgot Sgt. Weller.
The Local Galaxy Density and the Arm Class of Spiral Galaxies
Creators: name: Giuricin, G.
name: Monaco, P.
name: Mardirossian, F.
name: Mezzetti, M.
Publisher: name: arXiv
Year: 1993
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We have examined the effect of the environmental density on the arm classification of an extensive sample of spiral galaxies included in the Nearby Galaxy Catalog (Tully, 1988a). We have also explored the dependence of the arm class of a galaxy on other factors, such as its blue absolute magnitude and its disk-to-total mass ratio, inferred in the literature either from the gradient of a good galaxy rotation curve or from a photometric mass decomposition method. We have found that the arm class is strongly related to the absolute magnitude in the mid-type spirals (in the sense that grand design galaxies are, on average, more luminous than flocculent objects), whilst this relation is considerably weaker in the early and late types. In general the influence of the local density on the arm structure appears to be much weaker than that of the absolute magnitude. The local density acts essentially in strengthening the arm class--absolute magnitude relation for the mid types, whereas no environmental density effects are observed in the early and late types. Using the most recent estimates of the disk-to-total mass ratio, we do not confirm this ratio to be a significant factor which affects the arm class; nevertheless, owing to poor statistics and large uncertanties, the issue remains open. Neither a local density effect nor an unambiguous bar effect on the disk-to-total mass ratio is detectable; the latter finding may challenge some theoretical viewpoints on the formation of bar structures.
description: 15 pages, Latex, SISSA 102/93/A openbib.sty and 4 POSTSCRIPT figures appended
Warped/Composite Phenomenology Simplified
Creators: name: Contino, Roberto
name: Kramer, Thomas
name: Son, Minho
name: Sundrum, Raman
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: This is the first of two papers aimed at economically capturing the collider phenomenology of warped extra dimensions with bulk Standard Model fields, where the hierarchy problem is solved non-supersymmetrically. This scenario is related via the AdS/CFT correspondence to that of partial compositeness of the Standard Model. We present a purely four-dimensional, two-sector effective field theory describing the Standard Model fields and just their first Kaluza-Klein/composite excitations. This truncation, while losing some of the explanatory power and precision of the full higher-dimensional warped theory, greatly simplifies phenomenological considerations and computations. We describe the philosophy and explicit construction of our two-sector model, and also derive formulas for residual Higgs fine tuning and electroweak and flavor precision variables to help identify the most motivated parts of the parameter space. We highlight several of the most promising channels for LHC exploration. The present paper focusses on the most minimal scenario, while the companion paper addresses the even richer phenomenology of the minimal scenario of precision gauge coupling unification.
description: 41 pages, 8 figures. v2: minor corrections, a few comments and one reference added. v3: minor errors in eq.(32), (42) and (58) corrected, conclusions unchanged
Design, modelling and errors measurement of wheeled mobile robots
Creators: name: Korayem, M. H.
name: Nakhai, A.
name: BaniRostam, Touraj
Publisher: name: figshare
Year: 2025
Subjects: classificationCode: 461199
subject: Machine learning not elsewhere classified
classificationCode: 460299
subject: Artificial intelligence not elsewhere classified

description: This paper presents the mechanical design process of an omni-directional mobile robot. In addition, the kinematics equations of the final design are derived, and the inverse Jacobian matrix of the robot is presented. The dynamic equations of motion for the final design are derived in a symbolic form, assuming that no slip occurs on the wheel in the spin direction. In order to validate the kinematics and dynamic equation, we carried out consequences of simulation using two pieces of software, Maple and Working Model. Finally, the mobile robot is moved in given trajectories and the systematic errors of the robot are determined. To overcome the problems, a new method was introduced in which the robot was programmed to move in the direction of each wheel shaft.
title: ADCO, Huitième cartulaire de Saint-Étienne de Dijon (1661-1667), Cart. 31 (G 135), 549 folios, f. 0883
Creators: name: de la Côte d'Or, Archives départementales
name: CG21/F.PETOT/2012
name: Archives Départementales De La Côte-D'Or
name: Petot, Frédérique
name: Projet CBMA
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: Huitième cartulaire de Saint-Étienne de Dijon (1661-1667), Archives départementales de la Côte-d'Or, Cart. 31 (G 135), 549 folios, f. 0883, Numérisation en mode image.
description: Relation: http://www.cbma-project.eu/
description: Bibliographic citation: Huitième cartulaire de Saint-Étienne de Dijon (1661-1667), Archives départementales de la Côte-d'Or, Cart. 31 (G 135), 549 folios, f. 0883, in Projet CBMA - Corpus Burgundiae Medii Aevi [Ressource en ligne], https://manuscrits.cbma-project.eu/
description: Provenance: abbaye Saint-Étienne de Dijon
description: Provenance: http://www.wikidata.org/entity/Q15945019
Galactia regularis Britton
Creators: name: Jarvis, Charlie
Publisher: name: Linnaean Society of London in association with the Natural History Museum
Year: 2007
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Fabales
Fabaceae
Galactia
Galactia regularis

description: Dolichos regularis Linnaeus, Species Plantarum 2: 726. 1753.
"Habitat in Virginia." RCN: 5347.
 Lectotype (Duncan in Sida 8: 173. 1979): Clayton 121 (BM-000038167).
 Current name:  Galactia regularis  (L.) Britton & al. (Fabaceae: Faboideae).
description: Published as part of Jarvis, Charlie, 2007, Chapter 7: Linnaean Plant Names and their Types (part D), pp. 474-489 in Order out of Chaos. Linnaean Plant Types and their Types, London :Linnaean Society of London in association with the Natural History Museum on page 484, DOI: 10.5281/zenodo.291971
Goldstone boson currents in a kaon condensed CFL phase
Creators: name: Gerhold, Andreas
name: Schaefer, Thomas
name: Kryjevski, Andrei
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study the stability of the kaon condensed color-flavor locked (CFL) phase of dense quark matter with regard to the formation of a non-zero Goldstone boson current. In the kaon condensed phase there is an electrically charged fermion which becomes gapless near μ_s^(1) \simeq 1.35Δand a neutral fermion which becomes gapless near μ_s^(2)\simeq 1.61Δ. Here, μ_s=m_s^2/(2p_F) is the shift in the Fermi energy due to the strange quark mass m_s and Δis the gap in the chiral limit. The transition to the gapless phase is continuous at μ_s^(1) and first order at μ_s^(2). We find that the magnetic screening masses are real in the regime μ_s< μ_s^(2), but some screening masses are imaginary for μ_s> μ_s^(2). We show that there is a very weak current instability for μ_s>μ_s^(1) and a more robust instability in a small window near μ_s^(2). We also show that in the Goldstone boson current phase all components of the magnetic screening mass are real. There is a range of values of μ_s below 2Δin which the magnetic gluon screening masses are imaginary but the phase is stable with respect to electrically neutral fluctuations of the gauge field.
description: 16 pages
Armouring of a frictional interface by mechanical noise
Creators: name: Sergany, Elisa El
name: Wyart, Matthieu
name: de Geus, Tom W. J.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: A dry frictional interface loaded in shear often displays stick-slip. The amplitude of this cycle depends on the probability that a microscopic event nucleates a rupture and on the rate at which microscopic events are triggered. The latter is determined by the distribution of soft spots, $P(x)$, which is the density of microscopic regions that yield if the shear load is increased by some amount $x$. In minimal models of a frictional interface - that include disorder, inertia and long-range elasticity - we discovered an 'armouring' mechanism by which the interface is greatly stabilised after a large slip event: $P(x)$ then vanishes at small argument as $P(x)\sim x^θ$ [1]. The exponent $θ$ is non-zero only in the presence of inertia (otherwise $θ=0$). It was found to depend on the statistics of the disorder in the model, a phenomenon that was not explained. Here, we show that a single-particle toy model with inertia and disorder captures the existence of a non-trivial exponent $θ>0$, which we can analytically relate to the statistics of the disorder.
Higher Dimensional Inhomogeneous Perfect Fluid Collapse in \emph{f(R)} Gravity
Creators: name: Abbas, G.
name: Khan, M. S.
name: Ahmad, Zahid
name: Zubair, M.
Publisher: name: arXiv
Year: 2017
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: This paper is about the $n+2$-dimensional gravitational contraction of inhomogeneous fluid without heat flux in the framework of $f(R)$ metric theory of gravity. Matching conditions for two regions of a star has been derived by using the Darmois junction conditions. For the analytic solution of equations of motion in modified $f(R)$ theory of gravity, we have taken scalar curvature as constant. Hence final result of gravitational collapse in this frame work is the existence of black hole and cosmological horizons, both of these form earlier than singularity. It has been shown that constant curvature term $f(R_{0})$ ($R_0$ is constant scalar curvature) slows down the collapsing process.
description: 17 Pages, to appear in European Physical Journal C
On Bar-Natan - van der Veen's perturbed Gaussians
Creators: name: Becerra, Jorge
Publisher: name: arXiv
Year: 2023
Subjects: subject: Geometric Topology (math.GT)
subject: Quantum Algebra (math.QA)
subject: FOS: Mathematics
subject: 57K14, 16T05, 17B37

description: We elucidate further properties of the novel family of polynomial time knot polynomials devised by Bar-Natan and van der Veen based on the Gaussian calculus of generating series for noncommutative algebras. These polynomials determine all coloured Jones polynomials and the simplest of these is expected to coincide with the one-variable 2-loop polynomial. We prove a conjecture stating that half of these polynomials vanish and give concrete formulas for three of these knot polynomial invariants. We also study the behaviour of these polynomials under the connected sum of knots.
description: 56 pages. (A few typos corrected from the previous version)
Respiratory and cardiac monitoring at night using a wrist wearable optical system
Creators: name: Renevey, Philippe
name: Delgado-Gonzalo, Ricard
name: Lemkaddem, Alia
name: Verjus, Christophe
name: Combertaldi, Selina
name: Rasch, Björn
name: Leeners, Brigitte
name: Dammeier, Franziska
name: Kübler, Florian
Publisher: name: arXiv
Year: 2017
Subjects: subject: Signal Processing (eess.SP)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Sleep monitoring provides valuable insights into the general health of an individual and helps in the diagnostic of sleep-derived illnesses. Polysomnography, is considered the gold standard for such task. However, it is very unwieldy and therefore not suitable for long-term analysis. Here, we present a non-intrusive wearable system that, by using photoplethysmography, it can estimate beat-to-beat intervals, pulse rate, and breathing rate reliably during the night. The performance of the proposed approach was evaluated empirically in the Department of Psychology at the University of Fribourg. Each participant was wearing two smart-bracelets from Ava as well as a complete polysomnographic setup as reference. The resulting mean absolute errors are 17.4 ms (MAPE 1.8%) for the beat-to-beat intervals, 0.13 beats-per-minute (MAPE 0.20%) for the pulse rate, and 0.9 breaths-per-minute (MAPE 6.7%) for the breath rate.
description: Submitted to the 40th International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC)
My father's memoir
Creators: name: Project Team, Their Finest Hour
Publisher: name: University of Oxford
Year: 2024
Subjects: classificationCode: 430304
subject: British history
classificationCode: 430308
subject: European history (excl. British, classical Greek and Roman)
classificationCode: 430316
subject: International history

description: I have attached my dad's memoir of his wartime experiences with the RAOC in Egypt and Palestine. He had just been selected to play for Port Vale when war broke out, and that was the end of his football career.It was only when I cleared out the loft after dad's death in 2006 that I found a large bundle of correspondence—all the letters home which his mum had saved and all the letters which he had saved from (whom it then became clear) was the first love of his life. Her name was Gusta Imber, she was Jewish, and had enlisted as a member of the ATS in Palestine. They must have been together for three years or so and wanted to marry, but at the end of the war and dad's return to England, Gusta chose to stay and play her part in the creation of the State of Israel. They stayed in touch for several years—well after they had both married and started families. There is much personal but interesting correspondence from a time of great change and upheaval in the Middle East.
The 2-Hessian and sextactic points on plane algebraic curves
Creators: name: Maugesten, Paul Aleksander
name: Moe, Torgunn Karoline
Publisher: name: arXiv
Year: 2017
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 14H50, 14H45, 14H20

description: In an article from 1865, Arthur Cayley claims that given a plane algebraic curve there exists an associated 2-Hessian curve that intersects it in its sextactic points. In this paper we fix an error in Cayley's calculations and provide the correct defining polynomial for the 2-Hessian. In addition, we present a formula for the number of sextactic points on cuspidal curves and tie this formula to the 2-Hessian. Lastly, we consider the special case of rational curves, where the sextactic points appear as zeros of the Wronski determinant of the 2nd Veronese embedding of the curve.
description: Updated version to be published in Mathematica Scandinavica. Substantially rewritten, but with essential results unchanged. Contains results from first author's master's thesis. 21 pages, 2 figures
Dorstenia contrajerva Linnaeus 1753
Creators: name: Jarvis, Charlie
Publisher: name: Linnaean Society of London in association with the Natural History Museum
Year: 2007
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Rosales
Moraceae
Dorstenia
Dorstenia contrajerva

description: Dorstenia houstonii (Linnaeus) Linnaeus, Species Plantarum, ed. 2, 1: 176. 1762, nom. illeg.
"Habitat in Campechia." RCN: 993.
 Basionym: Dorstenia contrajerva L. var. houstonii L. (1753).
Type not designated.
Original material: as basionym.
 Current name:  Dorstenia contrajerva  L. (Moraceae).
 Note: Specific epithet spelled “houstoni” in the protologue. As D. alexiteria L. (1759) is a nomen novum at specific rank for D. contrajerva var. houstonii L. (1753), D. houstonii is a superfluous name for D. alexiteria L.
description: Published as part of Jarvis, Charlie, 2007, Chapter 7: Linnaean Plant Names and their Types (part D), pp. 474-489 in Order out of Chaos. Linnaean Plant Types and their Types, London :Linnaean Society of London in association with the Natural History Museum on page 486, DOI: 10.5281/zenodo.291971
Neutral Hydrogen Absorption and Emission in the Quasar/Galaxy Pair 3C275.1/\NGC4651
Creators: name: Schneider, Stephen E.
name: Corbelli, Edvige
Publisher: name: arXiv
Year: 1993
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: 3C275.1 and \NGC4651 make a particularly interesting quasar/galaxy pairing because of the alignment of such a strong radio emitter behind the outer H\I disk of a relatively undisturbed spiral galaxy. This provides an opportunity to study the spin-temperature characteristics of atomic hydrogen at low column densities, in an apparently star-free environment. We previously reported a tentative detection of absorption against the quasar based on VLA C--array observations; we have now made more sensitive maps of the H\I emission from \NGC4651 with the VLA D--array, and we have attempted to confirm the weak H\I absorption against the quasar at higher spatial and spectral resolution in VLA B--array. The possible absorption feature against this quasar appears to be weaker than we previously suspected, even though it seems fairly clear that H\I emission is present close to the line of sight to the quasar.The weakness of the possible absorption seems also to confirm, conversely, the trend found in previous observations that where strong absorption lines are seen, the galaxies show evidence of disturbance. The possible detection of (or limits on) absorption suggest that the neutral gas in the outer disk is quite warm. We use the absorption and emission measurements to set lower limits on the combination of heating inputs outside the star-forming regions of a disk galaxy and/or the intensity of the cosmic background radiation around 100 eV.
description: 13 pages, 4 figures ARCETRI-PR-93-11
Lightest sterile neutrino abundance within the nuMSM
Creators: name: Asaka, Takehiko
name: Laine, Mikko
name: Shaposhnikov, Mikhail
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We determine the abundance of the lightest (dark matter) sterile neutrinos created in the Early Universe due to active-sterile neutrino transitions from the thermal plasma. Our starting point is the field-theoretic formula for the sterile neutrino production rate, derived in our previous work [JHEP 06(2006)053], which allows to systematically incorporate all relevant effects, and also to analyse various hadronic uncertainties. Our numerical results differ moderately from previous computations in the literature, and lead to an absolute upper bound on the mixing angles of the dark matter sterile neutrino. Comparing this bound with existing astrophysical X-ray constraints, we find that the Dodelson-Widrow scenario, which proposes sterile neutrinos generated by active-sterile neutrino transitions to be the sole source of dark matter, is only possible for sterile neutrino masses lighter than 3.5 keV (6 keV if all hadronic uncertainties are pushed in one direction and the most stringent X-ray bounds are relaxed by a factor of two). This upper bound may conflict with a lower bound from structure formation, but a definitive conclusion necessitates numerical simulations with the non-equilibrium momentum distribution function that we derive. If other production mechanisms are also operative, no upper bound on the sterile neutrino mass can be established.
description: 34 pages. v2: clarifications and a reference added; published version. v3: erratum appended
Optimization of ohmic contacts to n-type GaAs nanowires
Creators: name: Hüttenhofer, Ludwig
name: Xydias, Dionysios
name: Lewis, Ryan B.
name: Rauwerdink, Sander
name: Tahraoui, Abbes
name: Küpers, Hanno
name: Geelhaar, Lutz
name: Marquardt, Oliver
name: Ludwig, Stefan
Publisher: name: arXiv
Year: 2017
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: III-V nanowires are comprehensively studied because of their suitability for optoelectronic quantum technology applications. However, their small dimensions and the spatial separation of carriers from the wire surface render electrical contacting difficult. Systematically studying ohmic contact formation by diffusion to $n$-doped GaAs nanowires, we provide a set of optimal annealing parameters for Pd/Ge/Au ohmic contacts. We reproducibly achieve low specific contact resistances of $\sim2\times10^{-7}\,Ω\text{cm}^2$ at room temperature becoming an order of magnitude higher at $T\simeq4.2\,$K. We provide a phenomenological model to describe contact resistances as a function of diffusion parameters. Implementing a transfer-matrix method, we numerically study the influence of the Schottky barrier on the contact resistance. Our results indicate that contact resistances can be predicted using various barrier shapes but further insights into structural properties would require a full microscopic understanding of the complex diffusion processes.
description: 11 pages, 10 figures
Post-Kerr black hole spectroscopy
Creators: name: Glampedakis, Kostas
name: Pappas, George
name: Silva, Hector O.
name: Berti, Emanuele
Publisher: name: arXiv
Year: 2017
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: One of the central goals of the newborn field of gravitational wave astronomy is to test gravity in the highly nonlinear, strong field regime characterizing the spacetime of black holes. In particular, "black hole spectroscopy" (the observation and identification of black hole quasinormal mode frequencies in the gravitational wave signal) is expected to become one of the main tools for probing the structure and dynamics of Kerr black holes. In this paper we take a significant step towards that goal by constructing a "post-Kerr" quasinormal mode formalism. The formalism incorporates a parametrized but general perturbative deviation from the Kerr metric and exploits the well-established connection between the properties of the spacetime's circular null geodesics and the fundamental quasinormal mode to provide approximate, eikonal limit formulae for the modes' complex frequencies. The resulting algebraic toolkit can be used in waveform templates for ringing black holes with the purpose of measuring deviations from the Kerr metric. As a first illustrative application of our framework, we consider the Johannsen-Psaltis deformed Kerr metric and compute the resulting deviation in the quasinormal mode frequency relative to the known Kerr result.
An Evacuee's Tale: From Kent to North Wales
Creators: name: Project Team, Their Finest Hour
Publisher: name: University of Oxford
Year: 2024
Subjects: classificationCode: 430304
subject: British history
classificationCode: 430308
subject: European history (excl. British, classical Greek and Roman)
classificationCode: 430316
subject: International history

description: The attached story details Cyril Hill's experiences during World War II, including evacuations, bombings, and near misses, offering a vivid account of the events that shaped his childhood.
Hi Spin Temperatures and Heating Requirements in Outer Regions of Disk Galaxies
Creators: name: Corbelli, Edvige
name: Salpeter, Edwin E.
Publisher: name: arXiv
Year: 1993
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: ABSRACT:We show how to use 21-cm emission and absorption studies to estimate the heat inputs to the neutral gas in low pressure environments, such as in outer disks of spiral galaxies, in galactic halos or in intergalactic space. For a range of model parameters we calculate the gas kinetic and spin temperatures ($T_K$ and $T_S$) and the relation between $T_S$ and the heat input to the gas. We outline the conditions for a ``two phase medium'' to exist. We find that although $T_S$ can be much smaller than $T_K$, $T_S$ is always $ \gg 3$ K for column densities greater that $5 \times 10^{18}$ cm$^{-2}$. This excludes the possibility that relevant HI masses at the periphery of galaxies are invisible at 21-cm in emission. The outermost interstellar gas in a disk galaxy is more directly affected by external processes and in this paper we estimate the intensity of the extragalactic background at energies close to 0.1 keV by comparing our theoretical results with HI emission/absorption studies. We take into account the possibility that some energy produced in the inner regions affects the energy balance in outer regions. We find that in the absence of any other local heat source QSO dominated background models are still compatible with the spin temperature limits derived for the two best documented HI emission/absorption studies in outer regions.
description: 24 pages, 8 figures ARCETRI-PR-93-24
Draba aizoides Linnaeus 1767
Creators: name: Jarvis, Charlie
Publisher: name: Linnaean Society of London in association with the Natural History Museum
Year: 2007
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Brassicales
Brassicaceae
Draba
Draba aizoides

description: Draba aizoides Linnaeus, Systema Naturae, ed. 12, 2: 432; Mantissa Plantarum: 91. 1767.
"Habitat in Alpibus Europae." RCN: 4668.
 Lectotype (Rich in Cafferty & Jarvis in Taxon 51: 533. 2002): Herb. Linn. No. 823.1 (LINN).
 Current name:  Draba aizoides  L. (Brassicaceae).
description: Published as part of Jarvis, Charlie, 2007, Chapter 7: Linnaean Plant Names and their Types (part D), pp. 474-489 in Order out of Chaos. Linnaean Plant Types and their Types, London :Linnaean Society of London in association with the Natural History Museum on page 486, DOI: 10.5281/zenodo.291971
Gravitational waves from $\rm{SU(}$$N$$\rm{)/Sp(}$$N$$\rm{)}$ composite Higgs models
Creators: name: Frandsen, Mads T.
name: Heikinheimo, Matti
name: Rosenlyst, Martin
name: Thing, Mattias E.
name: Tuominen, Kimmo
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study possible strong first-order electroweak phase transitions in Composite Higgs models and we quantify the part of parameter space that can be probed with future gravitational Wave experiments. We focus on models where the Composite Higgs sector arises from underlying four-dimensional strongly interacting gauge theories with fermions, and where the Standard Model fermion masses are induced via linear mixing terms with composite fermions -- the so-called fermion partial compositeness framework. We perform our analysis for the general class of Composite Higgs models arising from $ N $ Weyl fermions in a pseudo-real representation of the new strongly interacting gauge group that dynamically triggers the global chiral symmetry breaking pattern $\rm{SU(}$$N$$\rm{)}\rightarrow \rm{Sp(}$$N$$\rm{)}$. The minimal model has $ N=4 $ and for $ N>4 $ the models feature complex scalar dark matter candidates arising as pseudo-Nambu-Goldstone bosons. We find a large number of points in the models parameter space which yield strong first-order electroweak phase transitions and identify the most important operators characterizing the strength of the phase transition. Almost all of these points are testable with future GW detectors such as LISA, Taiji, Tianqin, BBO, DECIGO and Ultimate-DECIGO.
description: 35 pages, 6 figures, 1 table
Frederick George Draper's WW2 Diaries
Creators: name: Project Team, Their Finest Hour
Publisher: name: University of Oxford
Year: 2024
Subjects: classificationCode: 430304
subject: British history
classificationCode: 430308
subject: European history (excl. British, classical Greek and Roman)
classificationCode: 430316
subject: International history

description: Please note this submission contains links to websites that are created and maintained by other individuals and organisations.'A Private War,' a new local history book for those interested in WW2 by Carol Draper.Carol recently published her dad's war diaries. After the war, he became the founder of "AH Spares," initially in Whitnash and then moved to Southam.He was born in Smisby near Ashby de la Zouch in 1919 and was conscripted into the Royal Leicestershire Regiment at the age of 20 (1939). Travelling through Egypt, Transjordan, Syria, and India, his final destination was Burma, where he served as a Chindit.Preserved for over eighty years in an old Ovaltine tin, Carol has meticulously edited her dad's eight original handwritten notebooks.This literary work serves as a capsule, encapsulating the transformative experiences of one man during the Second World War. Even after eighty years, the narrative power of my dad's five-year story remains unwavering, serving as a poignant reminder of the resilient human spirit in the face of adversity.Putting the book together has been a real labour of love and had its emotional rollercoasters, but it is something that Carol is incredibly proud of.'A Private War: The Diaries of Frederick George Draper 1939-1945,' edited by Carol Draper. To purchase a signed copy, please visit www.zsazsapublishing.com.
title: ADCO, Sixième cartulaire de Saint-Étienne de Dijon (1662), Cart. 30 (G 133), 441 folios, f. 386
Creators: name: de la Côte d'Or, Archives départementales
name: Archives Départementales De La Côte-D'Or
name: Petot, Frédérique
name: Projet CBMA
name: Petot, Frédéric
name: CG21/F.PETOT/2012
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: cartulaire
subject: LaMOP
subject: Laboratoire de Médiévistique Occidentale de Paris

description: Sixième cartulaire de Saint-Étienne de Dijon (1662), Archives départementales de la Côte-d'Or, Cart. 30 (G 133), 441 folios, f. 386, Numérisation en mode image.
description: Relation: http://www.cbma-project.eu/
description: Bibliographic citation: Sixième cartulaire de Saint-Étienne de Dijon (1662), Archives départementales de la Côte-d'Or, Cart. 30 (G 133), 441 folios, f. 386, in Projet CBMA - Corpus Burgundiae Medii Aevi [Ressource en ligne], https://manuscrits.cbma-project.eu/
description: Provenance: abbaye Saint-Étienne de Dijon
description: Provenance: http://www.wikidata.org/entity/Q15945019
Off mass shell effects in associated production of the top quark pair and Higgs boson at a linear collider
Creators: name: Kolodziej, Karol
name: Szczypinski, Szymon
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We discuss effects related to the fact that the final state particles of a reaction e+ e- -> t \bar{t} H are actually produced and they decay off mass shell. For the intermediate mass Higgs boson, which decays preferably into a b\bar{b}-quark pair, the reaction will be observed through reactions with 8 fermions in the final state. Such reactions, already in the lowest order of the standard model, receive contributions typically from a few dozen thousands of the Feynman diagrams, the vast majority of which constitute background to the signal of associated production of the top quark pair and Higgs boson. In order to illustrate pure off mass shell effects we neglect the background contributions and compare the `signal' cross section with the cross section in the narrow width approximation for e+ e- -> b u \bar{d} \bar{b} mu- \bar{nu}_mu b \bar{b}, which is one of possible detection channels of the associated production of the top quark pair and Higgs boson at a linear collider.
description: 11 pages, 4 figures, version published in Acta Physica Polonica B
Surface Recognition for e-Scooter Using Smartphone IMU Sensor
Creators: name: Eweida, Areej
name: Segol, Nimord
name: Freydin, Maxim
name: Sfaradi, Niv
name: Or, Barak
Publisher: name: arXiv
Year: 2023
Subjects: subject: Signal Processing (eess.SP)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: In recent years, as the use of micromobility gained popularity, technological challenges connected to e-scooters became increasingly important. This paper focuses on road surface recognition, an important task in this area. A reliable and accurate method for road surface recognition can help improve the safety and stability of the vehicle. Here a data-driven method is proposed to recognize if an e-scooter is on a road or a sidewalk. The proposed method uses only the widely available inertial measurement unit (IMU) sensors on a smartphone device. deep neural networks (DNNs) are used to infer whether an e-scooteris driving on a road or on a sidewalk by solving a binary classification problem. A data set is collected and several different deep models as well as classical machine learning approaches for the binary classification problem are applied and compared. Experiment results on a route containing the two surfaces are presented demonstrating the DNNs ability to distinguish between them.
description: 4 pages, Preprint
Gravitational Scattering Amplitudes and Closed String Field Theory in the Proper-Time Gauge
Creators: name: Lee, Taejin
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We construct a covariant closed string field theory by extending recent works on the covariant open string field theory in the proper-time gauge. Rewriting the string scattering amplitudes generated by the closed string field theory in terms of the Polyakov string path integrals, we identify the Fock space representations of the closed string vertices. We show that the Fock space representations of the closed string field theory may be completely factorized into those of the open string field theory. It implies that the well known Kawai-Lewellen-Tye (KLT) relations of the first quantized string theory may be promoted to the second quantized closed string theory. We explicitly calculate the scattering amplitudes of three gravitons by using the closed string field theory in the proper-time gauge.
description: 5 pages, 1 figure, Talk given at 13th International Conference on Gravitation, Astrophysics, and Cosmology
Sharp Hi Edges in the Outskirts of Disk Galaxies
Creators: name: Corbelli, Edvige
name: Salpeter, Edwin E.
Publisher: name: arXiv
Year: 1993
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Observations indicate that some extended outer disks have a sharp cut off in the surface density of neutral hydrogen when this approaches the value of $\sim 2\times 10^{19}$ cm$^{-2}$. In this paper we model these HI edges as places where the ratio of neutral to ionized hydrogen drops rapidly due to ionizing radiation. We use two different models for the vertical distribution of gas above the outer galactic plane: in the first model we derive the density from the ideal gas law while in the second model we insert a macroscopic pressure term and derive the density as for an isothermal slab. We consider two different sources of ionizing photons: external fluxes of different intensity and spectral index due to quasars, and a monochromatic UV flux due to neutrino decays. We find that galaxies which have a smaller gas scale height should show outer HI disks to a lower column density and smoother HI edges. The sharpness of the HI-HII transition and the total column density at which the medium is 50$\%$ ionized, are strongly correlated. We present several model fits to the HI sharp edge observed in M33. If today's UV background is dominated by attenuated quasar light, which gives $\sim 10^{-14}$ H ionizations s$^{-1}$, a large gas scale height or equivalently a nearly spherical halo is preferred. If ionizing photons from decaying neutrinos are responsible for the sharp edge, a flat dark matter halo, is required.
description: 17 pages, 5 figures ARCETRI-PR-93-25
Two-loop virtual top-quark effect on Higgs-boson decay to bottom quarks
Creators: name: Butenschoen, Mathias
name: Fugel, Frank
name: Kniehl, Bernd A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In most of the mass range encompassed by the limits from the direct search and the electroweak precision tests, the Higgs boson of the standard model preferably decays to bottom quarks. We present, in analytic form, the dominant two-loop electroweak correction, of O(G_F^2 m_t^4), to the partial width of this decay. It amplifies the familiar enhancement due to the O(G_F m_t^2) one-loop correction by about +16% and thus more than compensates the screening by about -8% through strong-interaction effects of order O(alpha_s G_F m_t^2).
description: 9 pages, 1 figure
Non-crossing Hamiltonian Paths and Cycles in Output-Polynomial Time
Creators: name: Eppstein, David
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computational Geometry (cs.CG)
subject: Data Structures and Algorithms (cs.DS)
subject: FOS: Computer and information sciences

description: We show that, for planar point sets, the number of non-crossing Hamiltonian paths is polynomially bounded in the number of non-crossing paths, and the number of non-crossing Hamiltonian cycles (polygonalizations) is polynomially bounded in the number of surrounding cycles. As a consequence, we can list the non-crossing Hamiltonian paths or the polygonalizations, in time polynomial in the output size, by filtering the output of simple backtracking algorithms for non-crossing paths or surrounding cycles respectively. To prove these results we relate the numbers of non-crossing structures to two easily-computed parameters of the point set: the minimum number of points whose removal results in a collinear set, and the number of points interior to the convex hull. These relations also lead to polynomial-time approximation algorithms for the numbers of structures of all four types, accurate to within a constant factor of the logarithm of these numbers.
description: 24 pages, 9 figures. Full version of a paper to appear in a shorter form in the 39th International Symposium on Computational Geometry (SoCG 2023)
My experiences of wartime Norwich and the Norwich Blitz
Creators: name: Project Team, Their Finest Hour
Publisher: name: University of Oxford
Year: 2024
Subjects: classificationCode: 430304
subject: British history
classificationCode: 430308
subject: European history (excl. British, classical Greek and Roman)
classificationCode: 430316
subject: International history

description: Extract from my autobiography, 'To Remember is to live', concerning my experiences of wartime Norwich and the Norwich Blitz.
Draba alpina Linnaeus 1753
Creators: name: Jarvis, Charlie
Publisher: name: Linnaean Society of London in association with the Natural History Museum
Year: 2007
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Brassicales
Brassicaceae
Draba
Draba alpina

description: Draba alpina Linnaeus, Species Plantarum 2: 642. 1753.
"Habitat in Alpibus Europae." RCN: 4670.
 Lectotype (Elven in Jonsell & Jarvis in Nordic J. Bot. 22: 69. 2002): Herb. Linn. No. 823.5 (LINN).
 Current name:  Draba alpina  L. (Brassicaceae).
description: Published as part of Jarvis, Charlie, 2007, Chapter 7: Linnaean Plant Names and their Types (part D), pp. 474-489 in Order out of Chaos. Linnaean Plant Types and their Types, London :Linnaean Society of London in association with the Natural History Museum on page 486, DOI: 10.5281/zenodo.291971