cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Discovery of the elusive radical NCO and confirmation of H2NCO+ in space
Creators: name: Marcelino, N.
name: Agundez, M.
name: Cernicharo, J.
name: Roueff, E.
name: Tafalla, M.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The isocyanate radical (NCO) is the simplest molecule containing the backbone of the peptide bond, C(=O)-N. This bond has a prebiotic interest since is the one linking two amino acids to form large chains of proteins. It is also present in some organic molecules observed in space such as HNCO, NH2CHO and CH3NCO. In this letter we report the first detection in space of NCO towards the dense core L483. We also report the identification of the ion H2NCO+, definitively confirming its presence in space, and observations of HNCO, HOCN, and HCNO in the same source. For NCO, we derive a column density of 2.2e12 cm-2, which means that it is only about 5 times less abundant than HNCO. We find that H2NCO+, HOCN and HCNO have abundances relative to HNCO of 1/400, 1/80, and 1/160, respectively. Both NCO and H2NCO+ are involved in the production of HNCO and several of its isomers. We have updated our previous chemical models involving NCO and the production of the CHNO isomers. Taking into account the uncertainties in the model, the observed abundances are reproduced relatively well. Indeed, the detection of NCO and H2NCO+ in L483 supports the chemical pathways to the formation of the detected CHNO isomers. Sensitive observations of NCO in sources where other molecules containing the C(=O)-N subunit have been detected could help in elucidating its role in prebiotic chemistry in space.
description: Accepted for publication in A&A Letters
The Shape of Polarized Gluon Distributions
Creators: name: Morii, T.
name: Tanaka, S.
name: Yamanishi, T.
Publisher: name: arXiv
Year: 1994
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The recent high precision SMC data on polarized $μp$ scatterings have again confirmed that very little of the proton spin is carried by quarks. To unravel the mystery of the proton spin structure, it is quite important to know the behavior of the polarized gluon distribution. By using the positivity condition of distribution functions together with the unpolarized and polarized experimental data, we restrict the $x$ dependence of the polarized gluon distribution.
description: LaTeX file, 14 pages + 8 figures not included available upon request
The Experimental Nuclear Reaction Data (EXFOR): Extended Computer Database and Web Retrieval System
Creators: name: Zerkin, V. V.
name: Pritychenko, B.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Computational Physics (physics.comp-ph)
subject: Numerical Analysis (math.NA)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: The EXchange FORmat (EXFOR) experimental nuclear reaction database and the associated Web interface provide access to the wealth of low- and intermediate-energy nuclear reaction physics data. This resource is based on numerical data sets and bibliographical information of $\sim$22,000 experiments since the beginning of nuclear science. The principles of the Web and database applications development are described. New capabilities for the data sets uploads, renormalization, covariance matrix, and inverse reaction calculations are presented. The EXFOR database, updated monthly, provides an essential support for nuclear data evaluation, application development, and research activities. It is publicly available at the websites of the International Atomic Energy Agency Nuclear Data Section, {\it http://www-nds.iaea.org/exfor}, the U.S. National Nuclear Data Center, {\it http://www.nndc.bnl.gov/exfor}, and the mirror sites in China, India and Russian Federation.
description: 34 pages, 14 figures
Algebraic cones of LCK manifolds with potential
Creators: name: Ornea, Liviu
name: Verbitsky, Misha
Publisher: name: arXiv
Year: 2022
Subjects: subject: Algebraic Geometry (math.AG)
subject: Complex Variables (math.CV)
subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 32Q40, 14N99, 32Q28, 53C55

description: A complex manifold $X$ is called "LCK manifolds with potential" if it can be realized as a complex submanifold of a Hopf manifold. Let $Y$ its $\Z$-covering, considered as a complex submanifold in $C^n \backslash 0$. We prove that $Y$ is algebraic. We call the manifolds obtained this way the algebraic cones, and show that the affine algebraic structure on $Y$ is independent from the choice of $X$. We give several intrinsic definitions of an algebraic cone, and prove that these definitions are equivalent.
description: 28 pages, LaTeX, v. 2.0, minor error corrected, intro rewritten
Three-loop MSSM Higgs-Boson Mass Predictions and Regularization by Dimensional Reduction
Creators: name: Stöckinger, Dominik
name: Unger, Josua
Publisher: name: arXiv
Year: 2018
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The evaluation of three-loop contributions to the MSSM Higgs-boson mass is considered at the orders enhanced by the strong gauge coupling and top or bottom Yukawa couplings, i.e. at the orders $O(α_{t,b}α_s^2,α_{t,b}^2α_s,α_{t,b}^3)$. We prove that regularization by dimensional reduction preserves supersymmetry at the required level. Thus generating counterterms by multiplicative renormalization is correct. Technically, we extend a previous two-loop analysis to the three-loop level. The extension covers not only the genuine three-loop Higgs potential counterterms but also a large sector of two-loop counterterms, required for subrenormalization.
description: 21 pages, 5 figures
[Provincial Constitution]
Creators: name: Association Of University And College Employees
Publisher: name: The University of British Columbia
Year: 2018

description: File contains Provincial Constitution, Provincial Policies & Procedures, Rules of Order Governing Convention dated June 26-27, 1982. Topics discussed include objectives, jurisdiction, membership, charters, Local autonomy, information on the provincial executive and officers, nominations and elections, referendums, committees, conventions, revenue and finances, strikes and lockouts, discipline, procedures, bylaws, rules of order, affiliations, student employment, education, and resolutions of support.
Fast, high-order numerical evaluation of volume potentials via polynomial density interpolation
Creators: name: Anderson, Thomas G.
name: Bonnet, Marc
name: Faria, Luiz M.
name: Pérez-Arancibia, Carlos
Publisher: name: arXiv
Year: 2022
Subjects: subject: Numerical Analysis (math.NA)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: This article presents a high-order accurate numerical method for the evaluation of singular volume integral operators, with attention focused on operators associated with the Poisson and Helmholtz equations in two dimensions. Following the ideas of the density interpolation method for boundary integral operators, the proposed methodology leverages Green's third identity and a local polynomial interpolant of the density function to recast the volume potential as a sum of single- and double-layer potentials and a volume integral with a regularized (bounded or smoother) integrand. The layer potentials can be accurately and efficiently evaluated everywhere in the plane by means of existing methods (e.g. the density interpolation method), while the regularized volume integral can be accurately evaluated by applying elementary quadrature rules. Compared to straightforwardly computing corrections for every singular and nearly-singular volume target, the method significantly reduces the amount of required specialized quadrature by pushing all singular and near-singular corrections to near-singular layer-potential evaluations at target points in a small neighborhood of the domain boundary. Error estimates for the regularization and quadrature approximations are provided. The method is compatible with well-established fast algorithms, being both efficient not only in the online phase but also to set-up. Numerical examples demonstrate the high-order accuracy and efficiency of the proposed methodology; applications to inhomogeneous scattering are presented.
Naive nonabelianization and resummation of fermion bubble chains
Creators: name: Beneke, M.
name: Braun, V. M
Publisher: name: arXiv
Year: 1994
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We propose to extend the Brodsky-Lepage-Mackenzie scale-fixing prescription by resumming exactly any number of one-loop vacuum polarization insertions into one-loop diagrams. In this way, one makes maximal use of the information contained in one-loop perturbative corrections combined with the one-loop running of the effective coupling. The scale ambiguity at leading order is converted into an intrinsic uncertainty of perturbative approximations induced by IR renormalons. Practical implementation of this resummation requires only knowledge of one-loop radiative corrections with non-vanishing gluon mass. We find that higher order corrections to the pole mass and the top quark decay width are dominated by renormalons already in low orders and demonstrate the impact of eliminating the pole mass on the convergence of the perturbative series.
description: 12 pages, LATEX, no figures
ChatGPT in Veterinary Medicine: A Practical Guidance of Generative Artificial Intelligence in Clinics, Education, and Research
Creators: name: Chu, Candice P.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Computers and Society (cs.CY)
subject: FOS: Computer and information sciences

description: ChatGPT, the most accessible generative artificial intelligence (AI) tool, offers considerable potential for veterinary medicine, yet a dedicated review of its specific applications is lacking. This review concisely synthesizes the latest research and practical applications of ChatGPT within the clinical, educational, and research domains of veterinary medicine. It intends to provide specific guidance and actionable examples of how generative AI can be directly utilized by veterinary professionals without a programming background. For practitioners, ChatGPT can extract patient data, generate progress notes, and potentially assist in diagnosing complex cases. Veterinary educators can create custom GPTs for student support, while students can utilize ChatGPT for exam preparation. ChatGPT can aid in academic writing tasks in research, but veterinary publishers have set specific requirements for authors to follow. Despite its transformative potential, careful use is essential to avoid pitfalls like hallucination. This review addresses ethical considerations, provides learning resources, and offers tangible examples to guide responsible implementation. Carefully selected, up-to-date links to platforms that host large language models are provided for advanced readers with programming capability. A table of key takeaways was provided to summarize this review. By highlighting potential benefits and limitations, this review equips veterinarians, educators, and researchers to harness the power of ChatGPT effectively.
title: ADCO, Cartulaire général de Cîteaux, dit de Jean de Cirey, (XVe siècle), tome IV, Cart. 188 (11 H 73), f. 0242v
Creators: name: de la Côte d'Or, Archives départementales
name: Archives Départementales De La Côte-D'Or
name: Petot, Frédérique
name: Projet CBMA
name: CG21/F.PETOT/2012
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: cartulaire

description: Cartulaire général de Cîteaux, dit de Jean de Cirey, (XVe siècle), tome IV, Archives départementales de la Côte-d'Or, Cart. 188 (11 H 73), f. 0242v, 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 IV, Archives départementales de la Côte-d'Or, Cart. 188 (11 H 73), f. 0242v, 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
An image-based array trigger for Imaging Atmospheric Cherenkov Telescope Arrays
Creators: name: Dickinson, Hugh
name: Krennrich, Frank
name: Weinstein, Amanda
name: Eisch, Jonathan
name: Byrum, Karen
name: Anderson, John
name: Drake, Gary
Publisher: name: arXiv
Year: 2018
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: It is anticipated that forthcoming, next generation, atmospheric Cherenkov telescope arrays will include a number of medium-sized telescopes that are constructed using a dual-mirror Schwarzschild-Couder configuration. These telescopes will sample a wide ($8^{\circ}$) field of view using a densely pixelated camera comprising over $10^{4}$ individual readout channels. A readout frequency congruent with the expected single-telescope trigger rates would result in substantial data rates. To ameliorate these data rates, a novel, hardware-level Distributed Intelligent Array Trigger (DIAT) is envisioned. A copy of the DIAT operates autonomously at each telescope and uses reduced resolution imaging data from a limited subset of nearby telescopes to veto events prior to camera readout {and any subsequent network transmission of camera data that is required for centralized storage or aggregation}. We present the results of Monte-Carlo simulations that evaluate the efficacy of a "Parallax width" discriminator that can be used by the DIAT to efficiently distinguish between genuine gamma-ray initiated events and unwanted background events that are initiated by hadronic cosmic rays.
description: 22 pages, 12 figures. Accepted for publication in NIMA
Electromagnetic Polarizabilities and Charge Radii of the Nucleons in the Diquark-model
Creators: name: Liebl, H.
name: Goldstein, Gary R.
Publisher: name: arXiv
Year: 1994
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The diquark model is used to calculate the electromagnetic polarizabilities and charge radii of the nucleons for three different potentials. Making the scalar diquark lower in mass introduces a mixing angle $θ$ between the $\left| 56\right\rangle $ and $\left| 70\right\rangle $ states ,which allows an improvement in value of all 6 properties. Generalizing the Gamov-Teller matrix and the magnetic moment operator to the diquark model gives constraints on this mixing. We obtain for the Richardson potential $θ=23.2^{\circ },$ $\overline{α}_p=7.9_{-0.9}^{+1.0}\times 10^{-4}fm^3,$ $\overline{α}_n=7.7_{-0.6}^{+0.3}\times 10^{-4}fm^3,$ $\overline{β}_p=5.4_{-0.4}^{+1.6}\times 10^{-4}fm^3,$ $\overline{β}% _n=6.7_{-0.7}^{+1.3}\times 10^{-4}fm^3,$ $\left\langle r^2\right\rangle _p=0.37_{-0.03}^{+0.02}fm^2,$ $\left\langle r^2\right\rangle _n=-0.07_{-0.02}^{+0.03}fm^2.$ Additional pion cloud contributions could improve on all six results.
description: 15 Pages, Latex, Figs on request, to be published Phys.Lett.B. Minor errors corrected and eqn 5,6,8,9 corrected
Instability of resonances under Stark perturbations
Creators: name: Jensen, Arne
name: Yajima, Kenji
Publisher: name: arXiv
Year: 2018
Subjects: subject: Mathematical Physics (math-ph)
subject: Spectral Theory (math.SP)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: Primary 81V10, Secondary 35J10, 35P05, 35P25

description: Let $H^{\varepsilon}=-\frac{d^2}{dx^2}+\varepsilon x +V$, $\varepsilon\geq0$, on $L^2(\mathbf{R})$. Let $V=\sum_{k=1}^Nc_k|ψ_k\rangle\langleψ_k|$ be a rank $N$ operator, where the $ψ_k\in L^2(\mathbf{R})$ are real, compactly supported, and even. Resonances are defined using analytic scattering theory. The main result is that if $ζ_n$, ${\rm Im}ζ_n<0$, are resonances of $H^{\varepsilon_n}$ for a sequence $\varepsilon_n\downarrow0$ as $n\to\infty$ and $ζ_n\toζ_0$ as $n\to\infty$, ${\rm Im}ζ_0<0$, then $ζ_0$ is \emph{not} a resonance of $H^0$.
description: 11 pages
[Provincial Constitution]
Creators: name: Association Of University And College Employees
Publisher: name: The University of British Columbia
Year: 2018

description: File contains a provincial constitution, rules of order, and policies and procedures dated May 1981 to June 21-22, 1980. Topics discussed include objectives, jurisdiction, membership, charters, Local autonomy, information on the provincial executive and officers, nominations and elections, referendums, committees, conventions, revenue and finances, strikes and lockouts, discipline, procedures, bylaws, rules of order, affiliations, student employment, education, and resolutions of support.
Massive Star Formation in Galaxies: Radiative transfer models of the UV to mm emission of starburst galaxies
Creators: name: Efstathiou, A.
name: Rowan-Robinson, M.
name: Siebenmorgen, R.
Publisher: name: arXiv
Year: 1999
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present illustrative models for the UV to millimeter emission of starburst galaxies which are treated as an ensemble of optically thick giant molecular clouds (GMCs) centrally illuminated by recently formed stars. The models follow the evolution of the GMCs due to the ionization-induced expansion of the HII regions and the evolution of the stellar population within the GMC according to the Bruzual & Charlot stellar population synthesis models. The effect of transiently heated dust grains/PAHs to the radiative transfer, as well as multiple scattering, is taken into account. The expansion of the HII regions and the formation of a narrow neutral shell naturally explains why the emission from PAHs dominates over that from hot dust in the near to mid-IR, an emerging characteristic of the infrared spectra of starburst galaxies. The models allow us to relate the observed properties of a galaxy to its age and star formation history. We find that exponentially decaying 10^7-10^8 yrs old bursts can explain the IRAS colours of starburst galaxies. The models are also shown to account satisfactorily for the multiwavelength data on the prototypical starburst galaxy M82 and NGC6090, a starburst galaxy recently observed by ISO. In M82 we find evidence for two bursts separated by 10^7yrs. In NGC6090 we find that at least part of the far-IR excess may be due to the age of the burst (6.4 x 10^7yrs). We also make predictions about the evolution of the luminosity of starbursts at different wavelengths which indicate that far-IR surveys may preferentially detect older starbursts than mid-IR surveys.
description: 11 pages; accepted by MNRAS (submitted 9/9/98)
Multiple-target Robust Design with Multiple Functional Outputs
Creators: name: Jiang, Fan
name: Tan, Matthias Hwai Yong
name: Tsui, Kwok-Leung
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Biochemistry
subject: Medicine
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Neuroscience
subject: Pharmacology
subject: Biotechnology
subject: Biological Sciences not elsewhere classified
subject: Mathematical Sciences not elsewhere classified
subject: Developmental Biology
subject: Infectious Diseases
subject: FOS: Health sciences
subject: Computational Biology

description: Robust parameter design (RPD) is a quality improvement method to mitigate the effect of input noise on system output quality via adjustment of control and signal factors. This paper considers RPD with multiple functional outputs and multiple target functions based on a time-consuming nonlinear simulator, which is a challenging problem rarely studied in the literature. The Joseph-Wu formulation of multi-target RPD as an optimization problem is extended to accommodate multiple functional outputs and use of a Gaussian process (GP) emulator for the outputs. Due to computational demands in emulator fitting and expected loss function estimation posed by this big-data problem, a separable GP model is used. The separable regression and prior covariance functions, and the Cartesian product structure of the data are exploited to derive computationally efficient formulas for the posterior means of expected loss criteria for optimizing signal and control factors, and to develop a fast Monte Carlo procedure for building credible intervals for the criteria. Our approach is applied to an example on RPD of a coronary stent for treating narrowed arteries, which allows the optimal signal and control factor settings to be estimated efficiently. Supplementary materials are available for this article. Go to the publisher’s online edition of IIE Transaction, datasets, additional tables, detailed proofs, etc.
Runaway Quarks
Creators: name: Gurarie, V.
Publisher: name: arXiv
Year: 1994
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: When heavy nuclei collide, a quark-gluon plasma is formed. The plasma is subject to strong electric field due to the charge of the colliding nuclei. The electric field can influence the behavior of the quark-gluon plasma. In particular, we might observe an increased number of quarks moving in the direction of that field, as we do in the standard electron-ion plasma. In this paper we show that this phenomenon, called the runaway quarks, does not exist.
description: 13 pages, uses harvmac.tex, epsf.tex
The collision strength of the [Ne V] infrared fine-structure lines
Creators: name: van Hoof, P. A. M.
name: Beintema, D. A.
name: Verner, D. A.
name: Ferland, G. J.
Publisher: name: arXiv
Year: 1999
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The calculation of accurate collision strengths for atomic transitions has been a long standing problem in quantitative spectroscopy. Most modern calculations are based on the R-matrix method and problems pertaining to the use of this method have led to a discussion of the accuracy of these results. More in particular, based on an analysis of the spectra of NGC 3918 and NGC 6302, Clegg et al. (1987) and Oliva et al. (1996) have questioned R-matrix calculations for the infrared [Ne V] fine-structure transitions. Using improved flux measurements for the [Ne V] lines, we show that the conclusion that these collision strengths would be too high, is not correct. The discrepancies found by Clegg et al. (1987) can be explained by the inaccuracy of the [Ne V] 342.6 nm flux they adopted. The discrepancies found by Oliva et al. (1996) can be explained by the inaccuracy of the LRS flux for the [Ne V] 14.32 micron line. Based on the data presented in this paper there is no reason to assume that there are any problems with the R-matrix calculations for Ne^4+ of Lennon & Burke (1994). We show that the data are accurate at the 30 % level or better. This confirms the validity of the close coupling method.
description: 4 pages, 1 figure, accepted for publication in A&A Letters
Unit sphere fibrations in Euclidean space
Creators: name: Asimov, Daniel
name: Frick, Florian
name: Harrison, Michael
name: Pegden, Wesley
Publisher: name: arXiv
Year: 2022
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 55R25, 57R22, 57R30

description: We show that if an open set in $\mathbb{R}^d$ can be fibered by unit $n$-spheres, then $d \geq 2n+1$, and if $d = 2n+1$, then the spheres must be pairwise linked, and $n \in \left\{ 0, 1, 3, 7 \right\}$. For these values of $n$, we construct unit $n$-sphere fibrations in $\mathbb{R}^{2n+1}$.
description: 11 pages, 3 figures
Earth Trojan asteroids: A study in support of observational searches
Creators: name: Wiegert, Paul
name: Innanen, Kimmo
name: Mikkola, Seppo
Publisher: name: arXiv
Year: 1999
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Observational searches for asteroids orbiting near Earth's triangular Lagrange points face unique obstacles. A population of such asteroids would occupy a large projected area on the sky (possibly hundreds of square degrees) and is not favorably placed with respect to the Sun. Here we examine the properties of synthetic populations of Earth ``Trojans'' in order to aid in the optimization of observational searches for them. We find that the highest on-sky projected number densities are not located at the positions of the L4 and L5 points themselves, but rather a few degrees closer to the Sun. Also, asteroids on orbits about the L4 and L5 points typically brighten as the difference between their ecliptic longitude and that of the Sun increases owing to phase effects, but their number density on the sky concurrently falls rapidly.
description: 20 pages, 5 figures and 3 tables. Submitted to Icarus
Extra results from Information use during movement regulates how fragmentation and loss of habitat affect body size
Creators: name: Hillaert, Jasmijn
name: Vandegehuchte, Martijn L.
name: Hovestadt, Thomas
name: Bonte, Dries
Publisher: name: The Royal Society
Year: 2018
Subjects: subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: Ecology
subject: Computational Biology

description: An overview of extra results is presented.
The Singular Strata of a Free-Boundary problem for harmonic measure
Creators: name: McCurdy, Sean
Publisher: name: arXiv
Year: 2019
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: In this paper, we obtain \textit{quantitative} estimates on the fine structure of the singular set of the mutual boundary $\partial Ω^{\pm}$ for pairs of complementary domains, $Ω^+, Ω^- \subset \mathbb{R}^n$ which arise in a class of two-sided free boundary problems for harmonic measure. These estimates give new insight into the structure of the mutual boundary, $\partial Ω^{\pm}.$
description: 50 pages
Secular dynamics of hierarchical multiple systems composed of nested binaries, with an arbitrary number of bodies and arbitrary hierarchical structure. II. External perturbations: flybys and supernovae
Creators: name: Hamers, Adrian S.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We extend the formalism of a previous paper to include the effects of flybys and instantaneous perturbations such as supernovae on the long-term secular evolution of hierarchical multiple systems with an arbitrary number of bodies and hierarchy, provided that the system is composed of nested binary orbits. To model secular encounters, we expand the Hamiltonian in terms of the ratio of the separation of the perturber with respect to the barycentre of the multiple system, to the separation of the widest orbit. Subsequently, we integrate over the perturber orbit numerically or analytically. We verify our method for secular encounters, and illustrate it with an example. Furthermore, we describe a method to compute instantaneous orbital changes to multiple systems, such as asymmetric supernovae and impulsive encounters. The secular code, with implementation of the extensions described in this paper, is publicly available within AMUSE, and we provide a number of simple example scripts to illustrate its usage for secular and impulsive encounters, and asymmetric supernovae. The extensions presented in this paper are a next step toward efficiently modeling the evolution of complex multiple systems embedded in star clusters.
description: Accepted for publication in MNRAS. 24 pages, 7 figures
Probing a regular orbit with spectral dynamics
Creators: name: Copin, Y.
name: Zhao, H. S.
name: de Zeeuw, P. T.
Publisher: name: arXiv
Year: 1999
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We have extended the spectral dynamics formalism introduced by Binney & Spergel, and have implemented a semi-analytic method to represent regular orbits in any potential, making full use of their regularity. We use the spectral analysis code of Carpintero & Aguilar to determine the nature of an orbit (irregular, regular, resonant, periodic) from a short-time numerical integration. If the orbit is regular, we approximate it by a truncated Fourier time series of a few tens of terms per coordinate. Switching to a description in action-angle variables, this corresponds to a reconstruction of the underlying invariant torus. We then relate the uniform distribution of a regular orbit on its torus to the non-uniform distribution in the space of observables by a simple Jacobian transformation between the two sets of coordinates. This allows us to compute, in a cell-independent way, all the physical quantities needed in the study of the orbit, including the density and in the line-of-sight velocity distribution, with much increased accuracy. The resulting flexibility in the determination of the orbital properties, and the drastic reduction of storage space for the orbit library, provide a significant improvement in the practical application of Schwarzschild's orbit superposition method for constructing galaxy models. We test and apply our method to two-dimensional orbits in elongated discs, and to the meridional motion in axisymmetric potentials, and show that for a given accuracy, the spectral dynamics formalism requires an order of magnitude fewer computations than the more traditional approaches.
description: 13 pages, 18 eps figures, submitted to MNRAS
Additional file 1 of Identification of tissue-specific and common methylation quantitative trait loci in healthy individuals using MAGAR
Creators: name: Scherer, Michael
name: Gasparoni, Gilles
name: Rahmouni, Souad
name: Shashkova, Tatiana
name: Arnoux, Marion
name: Louis, Edouard
name: Nostaeva, Arina
name: Avalos, Diana
name: Dermitzakis, Emmanouil T.
name: Aulchenko, Yurii S.
name: Lengauer, Thomas
name: Lyons, Paul A.
name: Georges, Michel
name: Walter, Jörn
Publisher: name: figshare
Year: 2021
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 1: Additional text including method descriptions and additional figures S1-S10.
Segre nondegenerate totally real subvarieties
Creators: name: Lamel, Bernhard
name: Lebl, Jiri
Publisher: name: arXiv
Year: 2020
Subjects: subject: Complex Variables (math.CV)
subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 32V05, 32V40 (Primary), 14B05, 14P15 (Secondary)

description: We study an irreducible real-analytic germ of an $n$-dimensional variety in $n$ dimensional complex space. Assuming that the variety is Segre nondegenerate we define an averaging operator that generalizes the Moser--Webster involution. This operator can be thought of as being the CR structure of the singularity, and using this operator we study the set of functions that are restrictions of holomorphic functions. We give a condition on the flattening of the singularity, that is realizing the singularity as a codimention one subvariety of a nonsingular Levi-flat hypersurface.
description: 18 pages
Provincial Executive minutes (2 of 3)
Creators: name: Association Of University And College Employees
Publisher: name: The University of British Columbia
Year: 2019

description: File contains meeting minutes dated August 21, 1981 to November 28, 1981. Topics discussed include reports from Locals, grievances, charges against Local 5 and affiliation with CCU, correspondence, financial statements, per capita tax report, new executives, negotiations, strikes, development of an AUVE photo archive, communications with staff at the University of Victoria, supporting the Union of BC Indian Chiefs in opposing amendments to the Canadian constitution.
Design Space Exploration and Explanation via Conditional Variational Autoencoders in Meta-model-based Conceptual Design of Pedestrian Bridges
Creators: name: Balmer, Vera M.
name: Kuhn, Sophia V.
name: Bischof, Rafael
name: Salamanca, Luis
name: Kaufmann, Walter
name: Perez-Cruz, Fernando
name: Kraus, Michael A.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: For conceptual design, engineers rely on conventional iterative (often manual) techniques. Emerging parametric models facilitate design space exploration based on quantifiable performance metrics, yet remain time-consuming and computationally expensive. Pure optimisation methods, however, ignore qualitative aspects (e.g. aesthetics or construction methods). This paper provides a performance-driven design exploration framework to augment the human designer through a Conditional Variational Autoencoder (CVAE), which serves as forward performance predictor for given design features as well as an inverse design feature predictor conditioned on a set of performance requests. The CVAE is trained on 18'000 synthetically generated instances of a pedestrian bridge in Switzerland. Sensitivity analysis is employed for explainability and informing designers about (i) relations of the model between features and/or performances and (ii) structural improvements under user-defined objectives. A case study proved our framework's potential to serve as a future co-pilot for conceptual design studies of pedestrian bridges and beyond.
A New Catalogue of Galactic Novae: Investigation of the MMRD relation & Spatial Distribution
Creators: name: Özdönmez, Aykut
name: Ege, Ergün
name: Güver, Tolga
name: Ak, Tansel
Publisher: name: arXiv
Year: 2018
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: In this study, a new Galactic novae catalogue is introduced collecting important parameters of these sources such as their light curve parameters, classifications, full width half maximum (FWHM) of H$_α$ line, distances and interstellar reddening estimates. The catalogue is also published on a website with a search option via a SQL query and an online tool to re-calculate the distance/reddening of a nova from the derived reddening-distance relations. Using the novae in the catalogue, the existence of a maximum magnitude-rate of decline (MMRD) relation in the Galaxy is investigated. Although an MMRD relation was obtained, a significant scattering in the resulting MMRD distribution still exists. We suggest that the MMRD relation likely depends on other parameters in addition to the decline time, as FWHM H$_α$, the light curve shapes. Using two different samples depending on the distances in the catalogue and from the derived MMRD relation, the spatial distributions of Galactic novae as a function of their spectral and speed classes were studied. The investigation on the Galactic model parameters implies that best estimates for the local outburst density are 3.6 and 4.2 $\times 10^{-10}$ pc$^{-3}$ yr$^{-1}$ with a scale height of 148 and 175 pc, while the space density changes in the range of $0.4 - 16 \ \times 10^{-6}$ pc$^{-3}$. The local outburst density and scale height obtained in this study infer that the disk nova rate in the Galaxy is in the range of $\sim20$ to $\sim100$ yr$^{-1}$ with an average estimate $67^{+21}_{-17}$ yr$^{-1}$.
description: 24 pages, 9 figures, 6 tables; Accepted for publication in MNRAS on 13 Feb 2018
On strong shift equivalence for row-finite graphs and C*-algebras
Creators: name: Brix, Kevin Aguyar
name: Gautam, Pete
Publisher: name: arXiv
Year: 2022
Subjects: subject: Operator Algebras (math.OA)
subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics

description: This note extends and strengthens a theorem of Bates that says that row-finite graphs that are strong shift equivalent have Morita equivalent graph C*-algebras. This allows us to ask whether our stronger notion of Morita equivalence does in fact characterise strong shift equivalence. We believe this will be relevant for future research on infinite graphs and their C*-algebras. We also study insplits and outsplits as particular examples of strong shift equivalences and show that the induced Morita equivalences respect a whole family of weighted gauge actions. We then ask whether strong shift equivalence is generated by (generalised) insplits and outsplits.
description: 14 pages
Provincial Executive minutes (1 of 3)
Creators: name: Association Of University And College Employees
Publisher: name: The University of British Columbia
Year: 2019

description: File contains Provincial Executive meeting minutes dated January 17, 1981 to July 17, 1981. Topics discussed include a protest of cutbacks at tuition fees at Capilano College, correspondence, reports of officers and representatives, reports of Locals, the affiliation referendum, the annual convention, financial statements, office business and hiring, bylaw and constitutional amendments, strikes, grievances, "Ban the Klan" demonstration, Local 5 affiliation with the CCU and related disciplinary charges. File also contains one half-filled spiral bound stenographer's notebook with handwritten notes on AUCE business.
Genyocerus exilis
Creators: name: Beaver, R. A.
name: L.-Y
Publisher: name: Zenodo
Year: 2007
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Curculionidae
Genyocerus
Genyocerus exilis

description: Genyocerus exilis (Schedl) (Figs 9–10) Diacavus exilis Schedl, 1942: 218 (male); Browne, 1962: 219 (female). Genyocerus exilis (Schedl): Browne, 1980a: 371. Taxonomy: We have examined the male and female specimens taken in association by F. G. Browne and used by him to describe the female (BMNH) and have compared them with specimens of both sexes collected in Brunei (BMNH) and Sabah (ZMLU, RAB). The males are characterised by the presence of a large mycangial pore close to the midline on each side and lateral to these a group of 5–13 smaller pores. In the females, there are usually two large pores in addition to the group of smaller pores. In both sexes, occasional individuals lack the large pores. Distribution: East Malaysia (Sarawak), Indonesia (Maluku, Bacan I.), West Malaysia. It is newly recorded here from Brunei Darussalam and Sabah. It has been intercepted in Japan in timber from Borneo and Maluku. New Records: BRUNEI: 4 o 34'N, 115 o 7'E, Kuala Belalong FSC, Dipterocarp forest, 220 – 275 m. alt, fogging, malaise trap, flight intercept trap, various dates from 16.vi.1991 – 6.viii.1991, 8.ii.1992, 10.iii.1992 (N. Mawdsley) (8 ♂, 10 ♀) (BMNH); MALAYSIA: Sabah, Sipitang, Mendolong, 8.xii.1987, various dates from 10.iv.1988 – 13.v.1988, 10 – 31.iii.1989 (S. Adebratt) (20 ♂, 32 ♀) (ZMLU, RAB); Sabah, Poring Spring, lower montane, mixed dipterocarp forest,> 650m., fogging Aporusa sp., 22.iii.1993 (A. Floren) (1 ♂) (BZUW). Biology: Recorded from the following genera of Dipterocarpaceae: Anisoptera, Dipterocarpus, Dryobalanops, Shorea, Upuna, Vatica (Browne 1961a, Ohno 1990b)..
description: Published as part of Beaver, R. A. & L. - Y, 2007, A review of the genus Genyocerus Motschulsky (Coleoptera: Curculionidae: Platypodinae), with new synonyms and keys to species, pp. 25-56 in Zootaxa 1576 (1) on pages 35-36, DOI: 10.11646/zootaxa.1576.1.3, http://zenodo.org/record/5096943
description: {"references": ["Schedl, K. E. (1942) Forschungsberichte zur Scolytoiden-Fauna der Malayischen Halbinsel (V). Kolonialforstliche Mitteilungen, 5, 169 - 218.", "Browne, F. G. (1962) Some Scolytidae and Platypodidae (Coleoptera) from the Oriental region. Philippine Journal of Science, 89 (1960), 201 - 220.", "Browne, F. G. (1980 a) Bark beetles and ambrosia beetles (Coleoptera, Scolytidae and Platypodidae) intercepted at Japanese ports, with descriptions of new species, I. Kontyu, 48, 370 - 379.", "Browne, F. G. (1961 a) The biology of Malayan Scolytidae and Platypodidae. Malayan Forest Records, 22, 1 - 255.", "Ohno, S. (1990 b) The Scolytidae and Platypodidae (Coleoptera) from Borneo found in logs at Nagoya Port. 2. Research Bulletin of the Plant Protection Service Japan, 26, 95 - 103."]}
Hindered Settling of Well-Separated Particle Suspensions
Creators: name: Hillairet, Matthieu
name: Höfer, Richard M.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: We consider $N$ identical inertialess rigid spherical particles in a Stokes flow in a domain $Ω\subset \mathbb R^3$. We study the average sedimentation velocity of the particles when an identical force acts on each particle. If the particles are homogeneously distributed in directions orthogonal to this force, then they hinder each other leading to a mean sedimentation velocity which is smaller than the sedimentation velocity of a single particle in an infinite fluid. Under suitable convergence assumptions of the particle density and a strong separation assumption, we identify the order of this hindering as well as effects of small scale inhomogeneities and boundary effects. For certain configurations we explicitly compute the leading order corrections.
description: All comments welcome!
Provincial Executive minutes (3 of 3)
Creators: name: Association Of University And College Employees
Publisher: name: The University of British Columbia
Year: 2019

description: File contains meeting minutes dated January 6, 1981 to December 3, 1981. Topics discussed include amendments to bylaws, correspondence, committee reports, grievances, union staffing and executive positions, financial statements, the Teaching Assistants Union (TAU) at UBC, job classifications and descriptions for computer operators, office expenses, university retirement policy, debts, taxes, sexual harrassment seminars, labour education programs, Local 5 CCU affiliation, wage differences between AUCE and HEU members at Vancouver General Hospital (VGH), AUCE membership organization and participation, Local 1 relationship with Provincial Executive. File also includes computer operator job descriptions from UBC Employee Relations dated March 6, 1981.
Supplementary material part 6 from Information use during movement regulates how fragmentation and loss of habitat affect body size
Creators: name: Hillaert, Jasmijn
name: Vandegehuchte, Martijn L.
name: Hovestadt, Thomas
name: Bonte, Dries
Publisher: name: The Royal Society
Year: 2018
Subjects: subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: Ecology
subject: Computational Biology

description: This file offers a detailed description of the observed resource-consumer dynamics and differences between simulations in the spatial distribution of the resource.
Additional file 1 of Regulatory T cells protect against brain damage by alleviating inflammatory response in neuromyelitis optica spectrum disorder
Creators: name: Ma, Xue
name: Qin, Chuan
name: Chen, Man
name: Yu, Hai-Han
name: Chu, Yun-Hui
name: Chen, Ting-Jun
name: Bosco, Dale B.
name: Wu, Long-Jun
name: Bu, Bi-Tao
name: Wang, Wei
name: Tian, Dai-Shi
Publisher: name: figshare
Year: 2021
Subjects: subject: Immunology
subject: FOS: Clinical medicine

description: Additional file 1 : Table S1. Clinical characteristics of patients with NMOSD and healthy controls from whom serum samples were collected and purified IgG. Table S2. The primer sequences. Table S3. Demographics and baseline characteristics of patients with NMOSD and healthy controls.
The Timescales of Star Cluster Emergence: The Case of NGC 4449
Creators: name: McQuaid, Timothy
name: Calzetti, Daniela
name: Linden, Sean T.
name: Messa, Matteo
name: Adamo, Angela
name: Elmegreen, Bruce
name: Grasha, Kathryn
name: Johnson, Kelsey E.
name: Smith, Linda J.
name: Bajaj, Varun
Publisher: name: arXiv
Year: 2024
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We survey the young star cluster population in the dwarf galaxy NGC4449 with the goal of investigating how stellar feedback may depend on the clusters' properties. Using Ultraviolet(UV)-optical-NearIR(NIR) photometry obtained from the Hubble Space Telescope, we have recovered 99 compact sources exhibiting emission in the Pa$β$ hydrogen recombination line. Our analysis reveals these sources possess masses $10^{2}
On the fractional powers of a Schrödinger operator with a Hardy-type potential
Creators: name: Siclari, Giovanni
Publisher: name: arXiv
Year: 2023
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 35R11, 35J75, 35B40, 35B60

description: Strong unique continuation properties and a classification of the asymptotic profiles are established for the fractional powers of a Schrödinger operator with a Hardy-type potential, by means of an Almgren monotonicity formula combined with a blow-up analysis.
Supplementary Figure S2 from Balancing selection and introgression of newt immune-response genes
Creators: name: Fijarczyk, Anna
name: Dudek, Katarzyna
name: Niedzicka, Marta
name: Wiesław Babik
Publisher: name: The Royal Society
Year: 2018
Subjects: subject: Evolutionary Biology
subject: FOS: Biological sciences

description: The importance of interspecific introgression as a source of adaptive variation is increasingly recognized. Theory predicts that beneficial genetic variants cross species boundaries easily even when interspecific hybridization is rare and gene flow is strongly constrained throughout the genome. However, it remains unclear whether certain classes of genes are particularly prone to adaptive introgression. Genes affected by balancing selection (BS) may constitute such a class, because forms of BS that favour novel, initially rare alleles, should facilitate introgression. We tested this hypothesis in hybridizing newts by comparing 13 genes with signatures of BS, in particular an excess of common non-synonymous polymorphisms, to the genomic background (154 genes). Parapatric hybridizing taxa were less differentiated in BS candidate genes than more closely related allopatric lineages, while the opposite was observed in the control genes. Coalescent and forward simulations that explored neutral and BS scenarios under isolation and migration showed that processes other than differential gene flow are unlikely to account for this pattern. We conclude that BS, probably involving a form of novel allele advantage, promotes introgression. This mechanism may be a source of adaptively relevant variation in hybridizing species over prolonged periods.
Negative Thermal Expansion Behaviour in MZrF6 (M=Ca, Mg, Sr): Ab-initio Lattice Dynamical Studies
Creators: name: Gupta, M. K.
name: Singh, Baltej
name: Mittal, R.
name: Chaplot, S. L.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The thermal expansion behavior of metal fluorides can be tuned by choosing appropriate metal cation. We present ab-initio lattice dynamical studies on the metal fluorides (CaZrF6, MgZrF6 and SrZrF6) and identify the anharmonic phonon modes responsible for the negative thermal expansion in these materials. These phonons involve ZrF6 polyhedral rotational motion, which leads to large transverse amplitude of the vibrations of the fluorine atom in the Zr-F-Zr bond. The compounds with larger anisotropy in the thermal amplitude of the fluorine atoms show larger NTE behaviour. This has enabled to understand the large variation in thermal expansion behaviour of these compounds at high temperature. The calculations also predict decrease of the frequency of these anharmonic phonons with increasing temperature.
description: 17 Pages, 10 Figures