cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The geometry of barotropic flow
Creators: name: Preston, Stephen C.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics

description: In this article we write the equations of barotropic compressible fluid mechanics as a geodesic equation on an infinite-dimensional manifold. The equations are given by \begin{align} u_t + \nabla_uu = -\frac{1}ρ \grad p \\ ρ_t + \diver{(ρu)} = 0, \end{align} where the fluid fills up a compact manifold $M$, $u$ is a time-dependent velocity field on $M$, and $ρ$ is the density, a positive function on $M$. The barotropic assumption is that the pressure $p$ is some given function of the density, although our methods also extend to certain more general isentropic flows. Our infinite-dimensional manifold is the product $\mathcal{D}(M)\times C^{\infty}(M,\mathbb{R})$. This is a group using the semidirect product (which is sometimes incorporated in other treatments), but the Riemannian metric we use is neither left- nor right-invariant. Hence our geodesic equation is \emph{not} an Euler-Arnold equation. We compute the sectional curvature and show that at least when $M=S^1$, the curvature is always nonnegative. We also establish some results on the Lagrangian linear stability of solutions of this system, for certain nonsteady solutions in one dimension and steady solutions in two dimensions.
description: 19 pages; accepted by J. Math. Fluid Mech
Radial Coordinates for Conformal Blocks
Creators: name: Hogervorst, Matthijs
name: Rychkov, Slava
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We develop the theory of conformal blocks in CFT_d expressing them as power series with Gegenbauer polynomial coefficients. Such series have a clear physical meaning when the conformal block is analyzed in radial quantization: individual terms describe contributions of descendants of a given spin. Convergence of these series can be optimized by a judicious choice of the radial quantization origin. We argue that the best choice is to insert the operators symmetrically. We analyze in detail the resulting "rho-series" and show that it converges much more rapidly than for the commonly used variable z. We discuss how these conformal block representations can be used in the conformal bootstrap. In particular, we use them to derive analytically some bootstrap bounds whose existence was previously found numerically.
description: 27 pages, 9 figures; v2: misprints corrected
title: Английский язык
Creators: name: ELS IPR BOOKS
Publisher: name: Южно-Уральский технологический университет
Year: 2020

description: Предлагаемое пособие содержит учебно-тренировочный материал по всем аспектам речевой деятельности английского языка. Практикум состоит из 2 тематических разделов, содержащих разнообразный лексико-грамматический материал на базе актуальной информации, комплекс тренировочных упражнений и творческих заданий для активизации и закрепления полученных знаний, умений и навыков, справочный грамматический материал по морфологии, словообразованию и синтаксису. Целью данного учебного пособия является развитие навыков разговорной речи на английском языке. Учебное пособие предназначено для студентов, осваивающих образовательные программы бакалавриата неязыковых вузов.
title: Дизайн-деятельность как социокультурная практика: репрезентация в актуальном рекламном дискурсе
Creators: name: ELS IPR BOOKS
Publisher: name: Южно-Уральский технологический университет
Year: 2020

description: Работа имеет, прежде всего, научно-теоретическое значение в контексте развития культурологического знания, расширения и углубления проблематики изучения дизайн-деятельности. Основные положения работы могут быть применены в качестве учебного материала для разработки таких учебных курсов, как «Информационный дизайн и медиа», «Дизайн и рекламные технологии», «Конструирование в графическом дизайне», «Основы теории и методологии в графическом дизайне», «Дизайн-проектирование». Практическая значимость работы усматривается в интеграции результатов в деятельность дизайнеров-практиков, занятых в сфере графического дизайна, дизайна среды, рекламе, массовых коммуникациях в целях повышения качества создаваемых продуктов, опирающихся не только на принципы художественного творчества, но и на ценностносмысловые доминанты культуры.
NoSOCS in SDSS III - The interplay between galaxy evolution and the dynamical state of galaxy clusters
Creators: name: Ribeiro, Andre
name: Lopes, Paulo
name: Rembold, Sandro
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We investigate relations between the color and luminosity distributions of cluster galaxies and the evolutionary state of their host clusters. Our aim is to explore some aspects of cluster galaxy evolution and the dynamical state of clusters as two sides of the same process. We used 10,721 member galaxies of 183 clusters extracted from the Sloan Digital Sky Survey using a list of NoSOCS and CIRS targets. First, we classified the clusters into two categories, Gaussian and non-Gaussian, according to their velocity distribution measurements, which we used as an indicator of their dynamical state. We then used objective criteria to split up galaxies according to their luminosities, colors, and photometric mean stellar age. This information was then used to evaluate how galaxies evolve in their host clusters. Meaningful color gradients, i.e., the fraction of red galaxies as a function of radius from the center, are observed for both the Gaussian velocity distribution and the non-Gaussian velocity distribution cluster subsamples, which suggests that member galaxy colors change on a shorter timescale than the time needed for the cluster to reach dynamical equilibrium. We also found that larger portions of fainter red galaxies are found, on average, in smaller radii. The luminosity function in Gaussian clusters has a brighter characteristic absolute magnitude and a steeper faint-end slope than it does in the non-Gaussian velocity distribution clusters. Our findings suggest that cluster galaxies experience intense color evolution before virialization, while the formation of faint galaxies through dynamical interactions probably takes place on a longer timescale, possibly longer than the virialization time.
description: 10 pages, 6 figures, accepted for publication in the A&A
title: Сборник заданий по математическому анализу: учебное пособие
Creators: name: ELS IPR BOOKS
Publisher: name: Южно-Уральский технологический университет
Year: 2021

description: Содержание учебного пособия соответствует федеральным государственным образовательным стандартам высшего образования. Учебное пособие по математическому анализу содержит 3600 задач для самостоятельной работы, в том числе задачи с экономическим содержанием. Пособие включает также контрольные задания и тесты, что позволяет достаточно эффективно использовать пособие в процессе аудиторной и самостоятельной работы студентов, при проведении контрольных мероприятий, зачетов, экзаменов, при тестировании студентов. Учебное пособие предназначено для студентов-баклавров высших учебных заведений.
Analytical theory for the initial mass function: III time dependence and star formation rate
Creators: name: Hennebelle, Patrick
name: Chabrier, Gilles
Publisher: name: arXiv
Year: 2013
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The present paper extends our previous theory of the stellar initial mass function (IMF) by including the time-dependence, and by including the impact of magnetic field. The predicted mass spectra are similar to the time independent ones with slightly shallower slopes at large masses and peak locations shifted toward smaller masses by a factor of a few. Assuming that star-forming clumps follow Larson type relations, we obtain core mass functions in good agreement with the observationally derived IMF, in particular when taking into account the thermodynamics of the gas. The time-dependent theory directly yields an analytical expression for the star formation rate (SFR) at cloud scales. The SFR values agree well with the observational determinations of various Galactic molecular clouds. Furthermore, we show that the SFR does not simply depend linearly on density, as sometimes claimed in the literature, but depends also strongly on the clump mass/size, which yields the observed scatter. We stress, however, that {\it any} SFR theory depends, explicitly or implicitly, on very uncertain assumptions like clump boundaries or the mass of the most massive stars that can form in a given clump, making the final determinations uncertain by a factor of a few. Finally, we derive a fully time-dependent model for the IMF by considering a clump, or a distribution of clumps accreting at a constant rate and thus whose physical properties evolve with time. In spite of its simplicity, this model reproduces reasonably well various features observed in numerical simulations of converging flows. Based on this general theory, we present a paradigm for star formation and the IMF.
description: accepted for publication in ApJ
Double Greedy Algorithms: Reduced Basis Methods for Transport Dominated Problems
Creators: name: Dahmen, Wolfgang
name: Plesken, Christian
name: Welper, Gerrit
Publisher: name: arXiv
Year: 2013
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics
subject: 65J10, 65N12, 65N15, 35B30

description: The central objective of this paper is to develop reduced basis methods for parameter dependent transport dominated problems that are rigorously proven to exhibit rate-optimal performance when compared with the Kolmogorov $n$-widths of the solution sets. The central ingredient is the construction of computationally feasible "tight" surrogates which in turn are based on deriving a suitable well-conditioned variational formulation for the parameter dependent problem. The theoretical results are illustrated by numerical experiments for convection-diffusion and pure transport equations. In particular, the latter example sheds some light on the smoothness of the dependence of the solutions on the parameters.
A conversation about anti-racist approaches to student webcam requirements in online courses -- #WRT2021
Creators: name: Marquart, Matthea S.
name: Shedrick, Dawn E.
name: Ortega, Amelia
Publisher: name: Columbia University
Year: 2021
Subjects: Anti-racism
Distance education
Web-based instruction
Social work education

description: This is the handout from a roundtable session for the The 38th Annual Winter Roundtable: A Pandemic of Racism. #WRT2021 SESSION ABSTRACT: This roundtable discussion will be a conversation about anti-racist, inclusive approaches to student webcam requirements in online courses. The presenters are experienced online instructors, and will ask discussion questions around the four subthemes, as well as share experiences and tips as part of the conversation. By the end of the interactive conversation, participants should have had the opportunity to share their thoughts, ask questions, consider different perspectives, and learn from each other.
Explaining millimeter-sized particles in brown dwarf disks
Creators: name: Pinilla, P.
name: Birnstiel, T.
name: Benisty, M.
name: Ricci, L.
name: Natta, A.
name: Dullemond, C. P.
name: Dominik, C.
name: Testi, L.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Planets have been detected around a variety of stars, including low-mass objects, such as brown dwarfs. However, such extreme cases are challenging for planet formation models. Recent sub-millimeter observations of disks around brown dwarf measured low spectral indices of the continuum emission that suggest that dust grains grow to mm-sizes even in these very low mass environments. To understand the first steps of planet formation in scaled-down versions of T-Tauri disks, we investigate the physical conditions that can theoretically explain the growth from interstellar dust to millimeter-sized grains in disks around brown dwarf. We modeled the evolution of dust particles under conditions of low-mass disks around brown dwarfs. We used coagulation, fragmentation and disk-structure models to simulate the evolution of dust, with zero and non-zero radial drift. For the non-zero radial drift, we considered strong inhomogeneities in the gas surface density profile that mimic long-lived pressure bumps in the disk. We studied different scenarios that could lead to an agreement between theoretical models and the spectral slope found by millimeter observations. We find that fragmentation is less likely and rapid inward drift is more significant for particles in brown dwarf disks than in T-Tauri disks. We present different scenarios that can nevertheless explain millimeter-sized grains. As an example, a model that combines the following parameters can fit the millimeter fluxes measured for brown dwarf disks: strong pressure inhomogeneities of $\sim$ 40% of amplitude, a small radial extent $\sim$ 15 AU, a moderate turbulence strength $α_{\mathrm{turb}}= 10^{-3}$, and average fragmentation velocities for ices $v_f = 10 m s^{-1}$.
description: Accepted for publication in A\& A
Do radio magnetars J1550-5418 and J1622-4950 have gigahertz-peaked spectra?
Creators: name: Kijak, J.
name: Tarczewski, L.
name: Lewandowski, W.
name: Melikidze, G.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We study the radio spectra of two magnetars PSR J1550-5418 and J1622-4950. We argue that they are good candidates for the pulsars with gigahertz-peaked spectra as their observed flux density decreases at frequencies below 7 GHz. We suggest this behavior is due to the influence of pulsars' environments on the radio waves. Both of the magnetars are associated with supernova remnants, thus are surrounded by a hot, ionized gas, which can be responsible for the free-free absorption of radio-waves. We conclude that the GPS feature of both magnetars and typical pulsars are formed by similar processes in the surrounding media, rather than by different radio-emission mechanisms. Thus, the radio magnetars PSR J1550-5418 and J1622-4950 can be included in the class of the gigahertz-peaked spectra pulsars.
description: Accepted for publication in ApJ, 11 pages, 2 figures
Hybrid Density Functional Study of Structural and Electronic Properties of Functionalized \ce{Ti_{n+1}X_n} (X= C, N) monolayers
Creators: name: Xie, Yu
name: Kent, P. R. C.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: Density functional theory simulations with conventional (PBE) and hybrid (HSE06) functionals were performed to investigate the structural and electronic properties of MXene monolayers, \ce{Ti_{n+1}C_n} and \ce{Ti_{n+1}N_n} ($n$ = 1--9) with surfaces terminated by O, F, H, and OH groups. We find that PBE and HSE06 give similar results. Without functional groups, MXenes have magnetically ordered ground states. All the studied materials are metallic except for \ce{Ti_{2}CO_{2}}, which we predict to be semiconducting. The calculated density of states at the Fermi level of the thicker MXenes ($n$ $\geqslant$ 5) is much higher than for thin MXenes, indicating that properties such as electronic conductivity and surface chemistry will be different. In general, the carbides and nitrides behave differently with the same functional groups.
description: 8 figures
Cosmic Dust Aggregation with Stochastic Charging
Creators: name: Matthews, Lorin S.
name: Shotorban, Babak
name: Hyde, Truell W.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Space Physics (physics.space-ph)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: The coagulation of cosmic dust grains is a fundamental process which takes place in astrophysical environments, such as presolar nebulae and circumstellar and protoplanetary disks. Cosmic dust grains can become charged through interaction with their plasma environment or other processes, and the resultant electrostatic force between dust grains can strongly affect their coagulation rate. Since ions and electrons are collected on the surface of the dust grain at random time intervals, the electrical charge of a dust grain experiences stochastic fluctuations. In this study, a set of stochastic differential equations is developed to model these fluctuations over the surface of an irregularly-shaped aggregate. Then, employing the data produced, the influence of the charge fluctuations on the coagulation process and the physical characteristics of the aggregates formed is examined. It is shown that dust with small charges (due to the small size of the dust grains or a tenuous plasma environment) are affected most strongly.
Relativistic Covariance of Light-Front Few-Body Systems in Hadron Physics
Creators: name: Choi, Ho-Meoyng
name: Ji, Chueng-Ryong
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study the light-front covariance of a vector-meson decay constant using a manifestly covariant fermion field theory model in $(3+1)$ dimensions. The light-front zero-mode issues are analyzed in terms of polarization vectors and method of identifying the zero-mode operator and of obtaining the light-front covariant decay constant is discussed.
description: 4 pages, contribution to the 20th International IUPAP Conference on Few-Body Problems in Physics, 20 - 25 August, 2012, Fukuoka, Japan
Rapidly reconfigurable optically induced photonic crystals in hot rubidium vapor
Creators: name: Little, Bethany
name: Starling, David J.
name: Howell, John C.
name: Cohen, Raphael
name: Shwa, David
name: Katz, Nadav
Publisher: name: arXiv
Year: 2013
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Through periodic index modulation, we create two different types of photonic structures in a heated rubidium vapor for controlled reflection, transmission and diffraction of light. The modulation is achieved through the use of the AC Stark effect resulting from a standing-wave control field. The periodic intensity structures create translationally invariant index profiles analogous to photonic crystals in spectral regions of steep dispersion. Experimental results are consistent with modeling.
description: 6 pages, 6 figures
Deriving precise parameters for cool solar-type stars. Optimizing the iron line list
Creators: name: Tsantaki, M.
name: Sousa, S. G.
name: Adibekyan, V. Zh.
name: Santos, N. C.
name: Mortier, A.
name: Israelian, G.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Temperature, surface gravity, and metallicitity are basic stellar atmospheric parameters necessary to characterize a star. We aim to improve the description of the spectroscopic temperatures especially for the cooler stars where the differences with the Infrared Flux Method are higher, as presented in previous work. Our spectroscopic analysis is based on the iron excitation and ionization balance, assuming Kurucz model atmospheres in LTE. The abundance analysis is determined using the code MOOG. We optimize the line list using a cool star with high resolution and high signal-to-noise spectrum, as a reference in order to check for weak, isolated lines. We test the quality of the new line list by re-deriving stellar parameters for 451 stars with high resolution and signal-to-noise HARPS spectra, that were analyzed in a previous work with a larger line list. The comparison in temperatures between this work and the latest IRFM shows that the differences for the cooler stars are significantly smaller and more homogeneously distributed than in previous studies for stars with temperatures below 5000 K. We use the new line list to re-derive parameters for some of the cooler stars that host planets. Finally, we present the impact of the new temperatures on the [Cr I/Cr II] and [Ti I/Ti II] abundance ratios that previously showed systematic trends with temperature.
description: 11 pages, 14 figures, accepted to A&A
Margaronia indica
Creators: name: Swezey, O. H.
Publisher: name: Zenodo
Year: 1942
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Lepidoptera
Crambidae
Margaronia
Margaronia indica

description: 29.Margaronia indica (Saunders). Eudioptes indica Saunders, Ent. Soc. London, Trans. 2 (1): 163, pl. 12, figs. 5-7, 1851. Glyphodes indica, Hampson, Fauna Brit. India, Moths 4: 360, 1896. Margaronia indica, Tams, Ins. Samoa 3 (4): 282, 1935. This cucumber and melon pest occurs throughout Ethiopian, Oriental, and Australian regions, Fiji, Samoa, and Marquesas. It was not previously re­ ported from Guam, and we found only an occasional caterpillar on cucumber, melon, and pumpkin leaves. The only two reared were from Yigo, May 19, on honeydew melon; Piti, Sept. 30, on pepino melon, Swezey. Two caterpillars on cucumber leaves at Agana swamp were parasitized, probably by Cremastus flavo-orbitalis, but as the parasites died in cocoons, I cannot be positive of their identity.
description: Published as part of Swezey, O. H., 1946, Lepidoptera, Geometridae, Arctiidae, Agrotidae, and Pyralidae of Guam, pp. 163-185 in Insects of Guam II, Honolulu, Hawaii :Bernice P. Bishop Museum Bulletin 189 on page 181, DOI: 10.5281/zenodo.5165313
Margaronia samoana Swinhoe
Creators: name: Swezey, O. H.
Publisher: name: Zenodo
Year: 1942
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Lepidoptera
Crambidae
Margaronia
Margaronia samoana

description: 30.Margaronia samoana Swinhoe, Ann. Mag. Nat. Hist. VII, 18: 414, 1906; Tams, Ins. Samoa 3 (4): 283, 1935. Moths were reared from the following places: Inarajan, June 8; Asan, Aug. 22; Agat, Sept. 26; Sumay road, Oct. 1, Swezey; Piti, Sept. 11, 13, at light, Swezey. One specimen in Bishop Museum, Fullaway, 1911. Described from Samoa, I have found no other record of it. In Guam it occurred as a leafroller on hodda (Ficus tinctoria). The Guam specim~ns have the white portions of the wings pure white, whereas in specimens from Samoa at Bishop M1;1seumthese areas have a creamy tinge.
description: Published as part of Swezey, O. H., 1946, Lepidoptera, Geometridae, Arctiidae, Agrotidae, and Pyralidae of Guam, pp. 163-185 in Insects of Guam II, Honolulu, Hawaii :Bernice P. Bishop Museum Bulletin 189 on page 182, DOI: 10.5281/zenodo.5165313
Charge noise and spin noise in a semiconductor quantum device
Creators: name: Kuhlmann, Andreas V.
name: Houel, Julien
name: Ludwig, Arne
name: Greuter, Lukas
name: Reuter, Dirk
name: Wieck, Andreas D.
name: Poggio, Martino
name: Warburton, Richard J.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Solid-state systems which mimic two-level atoms are being actively developed. Improving the quantum coherence of these systems, for instance spin qubits or single photon emitters using semiconductor quantum dots, involves dealing with noise. The sources of noise are inherent to the semiconductor and are complex. Charge noise results in a fluctuating electric field, spin noise in a fluctuating magnetic field at the location of the qubit, and both can lead to dephasing and decoherence of optical and spin states. We investigate noise in an ultra-pure semiconductor using a minimally-invasive, ultra-sensitive, local probe: resonance fluorescence from a single quantum dot. We distinguish between charge noise and spin noise via a crucial difference in their optical signatures. Noise spectra for both electric and magnetic fields are derived. The noise spectrum of the charge noise can be fully described by the fluctuations in an ensemble of localized charge defects in the semiconductor. We demonstrate the "semiconductor vacuum" for the optical transition at frequencies above 50 kHz: by operating the device at high enough frequencies, we demonstrate transform-limited quantum dot optical linewidths.
Graph manifolds Z-homology 3-spheres and taut foliations
Creators: name: Boileau, Michel
name: Boyer, Steven
Publisher: name: arXiv
Year: 2013
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: Primary 57M99

description: We show that a graph manifold which is a Z-homology 3-sphere not homeomorphic to either the 3-sphere or the Poincaré homology 3-sphere admits a horizontal foliation. This combines with known results to show that the conditions of not being an L-space, of having a left-orderable fundamental group, and of admitting a co-oriented taut foliation, are equivalent for graph manifold Z-homology 3-spheres.
description: 16 pages
On higher order Leibniz identities in TCFT
Creators: name: Zeitlin, Anton M.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Algebra (math.QA)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: We extend the algebra of local observables in topological conformal field theories by nonlocal operators. This allows to construct parameter-dependent operations realized via certain integrals over the compactified moduli spaces, satisfying analogues of the Leibniz and higher order Leibniz identities holding up to homotopy. We conjecture that one can construct a complete set of such operations which lead to a parameter-dependent version of Loday's homotopy Leibniz algebras.
description: 14 pages, 5 figures
Extremal Myers-Perry black holes coupled to Born-Infeld electrodynamics in five dimensions
Creators: name: Allahverdizadeh, Masoud
name: Lemos, Jose P. S.
name: Sheykhi, Ahmad
Publisher: name: arXiv
Year: 2013
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We construct a new class of perturbative extremal charged rotating black hole solutions in five dimensions in the Einstein--Born-Infeld theory. We start with an extremal five-dimensional Myers-Perry black hole seed in which the two possible angular momenta have equal magnitude, and add Born-Infeld electrical charge keeping the extremality condition as a constraint. The perturbative parameter is assumed to be the electric charge $q$ and the perturbations are performed up to 4th order. We also study some physical properties of these black holes. It is shown that the perturbative parameter $q$ and the Born-Infeld parameter $β$ modify the values of the physical quantities of the black holes. The solution suggests that the magnetic moment and gyromagnetic ratio of the black hole spacetime change sign when the Born-Infeld character of the solution starts to depart strongly from the Maxwell limit. We venture an interpretation for the effect.
Margaronia mysteris
Creators: name: Swezey, O. H.
Publisher: name: Zenodo
Year: 1942
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Lepidoptera
Crambidae
Margaronia
Margaronia mysteris

description: 32.Margaronia mysteris (Meyrick). Cydalima mysteris Meyrick, Ent. Soc. London, Trans., 223, 1886. Margaronia mysteris, Tams, Ins. Samoa 3 (4): 281, 1935. Described from the New Hebrides, and also known from Samoa; now recorded from Guam. One moth was reared from a leafroller caterpillar on Colubrina asiatica at Fadian, Aug. 19, Swezey; one moth collected at Fadian, Sept. 18, Swezey.
description: Published as part of Swezey, O. H., 1946, Lepidoptera, Geometridae, Arctiidae, Agrotidae, and Pyralidae of Guam, pp. 163-185 in Insects of Guam II, Honolulu, Hawaii :Bernice P. Bishop Museum Bulletin 189 on page 182, DOI: 10.5281/zenodo.5165313
Time delay between the optical and X-ray outbursts in the high mass X-ray transient A0535+26/HDE245770
Creators: name: Giovannelli, F.
name: Bisnovatyi-Kogan, G. S.
name: Klepnev, A. S.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The optical behaviour of the Be star in the high mass X-ray transient A0535+26/HDE245770 shows that at the periastron typically there is an enhancement in the luminosity of order 0.02 to few tenths mag, and the X-ray outburst happens about 8 days after the periastron. We construct a quantitative model of this event, basing on the a nonstationary accretion disk behavior, connected with a high ellipticity of the orbital motion. The ephemeris used in this paper -- JD$_{\rm opt-outb}$ = JD$_0$(2,444,944) $\pm$ n(111.0 $\pm$ 0.4) days are derived from the orbital period of the system P$_{\rm orb} = 111.0 \pm 0.4$ days, determined by Priedhorsky & Terrell (1983), and from the optical flare of December 5, 1981 (Giovannelli et al., 1985) (here after 811205-E; E stands for the Event occurred at that date) that triggered the subsequent X-ray outburst of December 13, 1981 (Nagase et al., 1982) (here after 811213-E). We explain the observed time delay between the peaks of the optical and X-ray outbursts in this system by the time of radial motion of the matter in the accretion disk, after an increase of the mass flux in the vicinity of a periastral point in the binary. This time is determined by the turbulent viscosity, with the parameter $α=0.1-0.3$. The increase of the mass flux is a sort of flush that reaches the external part of the accretion disk around the neutron star, producing an enhancement in the optical luminosity. The consequent X-ray flare happens when the matter reaches the hot central parts of the accretion disk, and the neutron star surface.
description: 30 pages, 15 figures, with correction in abstract
Quark sector of S3 models: classification and comparison with experimental data
Creators: name: Canales, F. González
name: Mondragón, A.
name: Mondragón, M.
name: Salazar, U. J. Saldaña
name: Velasco-Sevilla, L.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: S3 models offer a low energy approach to describe the observed pattern of masses and mixing, of both quarks and leptons. In this work, we first revisit an S3 model with only one Higgs electroweak doublet, where the flavour symmetry must be broken in order to produce an acceptable pattern of masses and mixing for fermions. Then, we analyse different S3 models, where the flavour symmetry is preserved as an exact, but hidden symmetry of the low energy spectra, after the electroweak symmetry breaking. The latter models require the addition of two more Higgs electroweak doublets which are accommodated in an S3 doublet. We also explore the consequences of adding a fourth Higgs electroweak doublet, thus occupying all three irreducible representations of S3. We show how the various S3-invariant mass matrices of the different models can reproduce the two texture zeroes and Nearest Neighbour Interaction matrix forms, which have been found to provide a viable and universal treatment of mixing for both quarks and leptons. We also find analytical and exact expressions for the CKM matrix of the models in terms of quark mass ratios. Finally, we compare the expressions of the CKM matrix of the different S3 models with the most up to date values of masses and mixing in the quark sector, via a chi^2 analysis. We find that the analytical expressions we derived reproduce remarkably well the most recent experimental data of the CKM matrix, suggesting that S3 is a symmetry of the quark sector.
description: 42 pages, 10 figures
Optical and Near-infrared survey of the stellar contents associated with the star-forming Complex Sh2-252
Creators: name: Jose, Jessy
name: Pandey, A. K.
name: Ogura, K.
name: Samal, M. R.
name: Ojha, D. K.
name: Bhatt, B. C.
name: Chauhan, N.
name: Eswaraiah, C.
name: Mito, H.
name: Kobayashi, N.
name: Yadav, R. K.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present the analyses of the stellar contents associated with the HII region Sh2-252 using UBVRI photometry, slit and slitless spectroscopy along with the NIR data from 2MASS for an area ~1 degree x 1 degree. We studied the sub-regions of Sh2-252 which includes four compact-HII (CHII) regions, namely A, B, C and E and two clusters NGC 2175s and Teutsch 136 (Teu 136). Of the fifteen spectroscopically observed bright stars, eight have been identified as massive members of spectral class earlier than B3. From the spectro-photometric analyses, we derived the average distance of the region as 2.4+/-0.2 kpc and the reddening of the massive members is found to vary between 0.35 to 2.1 mag. We found that NGC 2175s and Teu 136, located towards the eastern edge of the complex are the sub-clusters of Sh2-252. The stellar surface density distribution in K-band shows clustering associated with the regions A, C, E, NGC 2175s and Teu 136. We have also identified the candidate ionizing sources of the CHII regions. 61 H_alpha emission sources are identified using slitless spectroscopy. The distribution of the H_alpha emission sources and candidate YSOs with IR excess on the V/(V-I) CMD shows that a majority of them have approximate ages between 0.1 - 5 Myr and masses in the range of 0.3 - 2.5 M_sun. The CMDs of the candidate YSOs in the individual regions also show an age spread of 0.1 - 5 Myr for each of them. We calculated the KLFs for the sub-regions A, C, E, NGC 2175s and Teu 136. Within errors, the KLFs for all the sub-regions are found to be similar and comparable to that of young clusters of age < 5 Myr. We also estimated the mass functions (MFs) of the PMS sample of the individual regions in the mass range of 0.3 - 2.5 M_sun. In general, the slopes of the MFs of all the sub-regions are found comparable to the Salpeter value.
description: published in MNRAS
Concept for the 2022-2025 operating phase of IEA Wind Task 32
Creators: name: Clifton, Andrew
name: Schlipf, David
name: Gottschall, Julia
Publisher: name: Zenodo
Year: 2021
Subjects: wind lidar
wind energy

description: IEA Wind Task 32 on wind lidar for wind energy applications is planning a new phase, starting in 2022. This PDF contains an overview of the concept for the phase. It was also used to collect feedback about the themes that would be addressed in the next phase. The presentation took place on 15th July 2021. This was the first of two workshops on the future concept for the Task. The participants were split into breakout rooms where they added more information to the slides for each of the four themes. This input is included in slides 21 to 35.
description: Please send any feedback about Task 32's plans to the Operating Agents at ieawind.task32@ifb.uni-stuttgart.de.
Families of ultrafilters, and homomorphisms on infinite direct product algebras
Creators: name: Bergman, George M.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Logic (math.LO)
subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics
subject: 03C20 (Primary), 17A01 (Secondary)

description: Criteria are obtained for a filter F of subsets of a set I to be an intersection of finitely many ultrafilters, respectively, finitely many κ-complete ultrafilters for a given uncountable cardinal κ. From these, general results are deduced concerning homomorphisms on infinite direct product groups, which yield quick proofs of some results in the literature: the Łoś-Eda theorem (characterizing homomorphisms from a not-necessarily-countable direct product of modules to a slender module), and some results of N. Nahlus and the author on homomorphisms on infinite direct products of not-necessarily-associative k-algebras. The same tools allow other results of Nahlus and the author to be nontrivially strengthened, and yield an analog to one of their results, with nonabelian groups taking the place of k-algebras. We briefly examine the question of how the common technique used in applying the general results of this note to k-algebras on the one hand, and to nonabelian groups on the other, might be extended to more general varieties of algebras in the sense of universal algebra. In a final section, the Erdős-Kaplansky Theorem on dimensions of vector spaces D^I (D a division ring) is extended to reduced products D^I/F, and an application is noted.
description: 12 pages. Copy at http://math.berkeley.edu/~gbergman/papers may be updated more frequently than arXiv copy
Isobaric analog states in the f_{7/2} and g_{9/2} shells
Creators: name: Zamick, Larry
name: Robinson, Shadow
name: Escuderos, Alberto
name: Sharon, Yitzhak
name: Kirson, Michael
Publisher: name: arXiv
Year: 2013
Subjects: subject: Nuclear Theory (nucl-th)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Calculations are performed for energies of isobaric analog states with isospins T=2 and T=3 in regions where they have been found experimentally e.g. f-p shell, and regions where they have not yet been found e.g. g_{9/2} near Z=50,N=50. We consider two approaches--one using binding energy formulas and Coulomb energies contained therein and the other using shell model calculations. It is noted that some (but not all) calculations yield very low excitation energies for the J=0^{+} T=2 isobaric analog state in ^{96} Ag.
Non-Axisymmetric Instability of Rotating Black Holes in Higher Dimensions
Creators: name: Hartnett, Gavin S.
name: Santos, Jorge E.
Publisher: name: arXiv
Year: 2013
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We calculate the scalar-gravitational quasi-normal modes of equal angular momenta Myers-Perry black holes in odd dimensions. We find a new bar-mode (non-axisymmetric) classical instability for $D \ge 7$. These black holes were previously found to be unstable to axisymmetric perturbations for spins very near extremality. The bar-mode instability we find sets in at much slower spins, and is therefore the dominant instability of these black holes. This instability has important consequences for the phase diagram of black holes in higher dimensions.
description: 5 pages, 2 figures, v2: minor revisions
Routine analyses of Sentinel-3A SLSTR Sea Surface Temperature (SST) employing Monitoring & Evaluation of Thematic Information from Space (METIS)
Creators: name: Dash, Prasanjit
Publisher: name: Zenodo
Year: 2017

description: Poster presented at the 18th GHRSST science meeting (XVIII), Qingdao, China, June 5 - 9, 2017.
Modelling spreading dynamics of liquid crystals in three spatial dimensions
Creators: name: Lin, Te-Sheng
name: Kondic, Lou
name: Thiele, Uwe
name: Cummings, Linda J.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We study spreading dynamics of nematic liquid crystal droplets within the framework of the long-wave approximation. A fourth order nonlinear parabolic partial differential equation governing the free surface evolution is derived. The influence of elastic distortion energy and of imposed anchoring variations at the substrate are explored through linear stability analysis and scaling arguments, which yield useful insight and predictions for the behaviour of spreading droplets. This behaviour is captured by fully nonlinear time-dependent simulations of three dimensional droplets spreading in the presence of anchoring variations that model simple defects in the nematic orientation at the substrate.
Supersymmetric Optical Structures
Creators: name: Miri, Mohammad-Ali
name: Heinrich, Matthias
name: El-Ganainy, Ramy
name: Christodoulides, Demetrios N.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Optics (physics.optics)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We show that supersymmetry can provide a versatile platform in synthesizing a new class of optical structures with desired properties and functionalities. By exploiting the intimate relationship between superpatners, one can systematically construct index potentials capable of exhibiting the same scattering and guided wave characteristics. In particular, in the Helmholtz regime, we demonstrate that one-dimensional supersymmetric pairs display identical reflectivities and transmittivities for any angle of incidence. Optical SUSY is then extended to two-dimensional systems where a link between specific azimuthal mode subsets is established. Finally we explore supersymmetric photonic lattices where discreteness can be utilized to design lossless integrated mode filtering arrangements.
description: 5 pages, 5 figures
Dynamical properties of nanolasers based on few discrete emitters
Creators: name: Moelbjerg, Anders
name: Kaer, Per
name: Lorke, Michael
name: Tromborg, Bjarne
name: Mørk, Jesper
Publisher: name: arXiv
Year: 2013
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We investigate the dynamical properties of nanolasers comprising a few two-level emitters coupled to an optical cavity. A set of rate equations is derived, which agree very well with a solution of the full master equation model and makes it simple to investigate the properties of the system. Using a linearized version of these rate equations, we can analytically express the response of the nanolaser to a modulation of the pumping rate. These results are compared to the modulation response obtained directly from the master equation using a novel method. Using the rate equation method, we calculate the modulation bandwidth and show that, contrary to conventional semiconductor lasers, the nanolaser is typically over-damped and displays a dip in the modulation bandwidth as the two-level systems become inverted. Both these features can be traced back to the modeling of the emitters as two-level systems that are incoherently pumped.
description: 11 pages, 5 figures
Topological effects and particle-physics analogies beyond the massless Dirac-Weyl fermion in graphene nanorings
Creators: name: Romanovsky, Igor
name: Yannouleas, Constantine
name: Landman, Uzi
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Armchair and zigzag edge terminations in planar hexagonal and trigonal graphene nanorings are shown to underlie one-dimensional topological states associated with distinctive energy gaps and patterns (e.g., linear dispersion of the energy of an hexagonal ring with an armchair termination versus parabolic dispersion for a zigzag terminated one) in the bands of the tight-binding spectra as a function of the magnetic field. A relativistic Dirac-Kronig-Penney model analysis of the tight-binding Aharonov-Bohm behavior reveals that the graphene quasiparticle in an armchair hexagonal ring is a condensed-matter realization of an ultrarelativistic fermion with a position-dependent mass term, akin to the zero-energy fermionic solitons with fractional charge familiar from quantum field theory and from the theory of polyacetylene. The topological origins of the above behavior are highlighted by contrasting it with the case of a trigonal armchair ring, where we find that the quasiparticle excitations behave as familiar Dirac fermions with a constant mass. Furthermore, the spectra of a zigzag hexagonal ring correspond to the low-kinetic-energy nonrelativistic regime of a leptonlike massive fermion. A onedimensional relativistic Lagrangian formalism coupling a fermionic and a scalar bosonic field via a Yukawa interaction, in conjunction with the breaking of the Z2 reflectional symmetry of the scalar field, is shown to unify the above dissimilar behaviors.
description: 12 pages with 10 color figures. For related papers, see http://www.prism.gatech.edu/~ph274cy/ For a version with high-quality figures, see http://www.prism.gatech.edu/~ph274cy/
title: Konflikte und Spannungsfelder bei öffentlich-zivilgesellschaftlichen Akteuren in Südtirol im Kontext des Klimawandels
Creators: name: Bachmann, Michaela
Year: 2022

description: Das globale Klimasystem steht im Wandel. Die 2022 bereits überschrittene Temperaturerhöhung von 1.1° C macht deutlich, dass ohne eine radikale Senkung der Treibhausgase das Erreichen der globalen Klimaziele nicht möglich sein kann. Durch das bereits erreichte Ausmaß des Klimawandels sowie projizierte Szenarien, ist es notwendig, neben den vieldiskutierten mitigation-Möglichkeiten auch adaptation- Maßnahmen zu untersuchen, um potenzielle Katastrophen zu verhindern. Vor allem Bergregionen wie die Provinz Südtirol laufen durch ihre landschaftliche Morphologie Gefahr, durch häufigere, intensivere und länger andauernde Extremwetterereignisse die Folgen des Klimawandels deutlich zu spüren. Im Rahmen dieser Arbeit soll deshalb untersucht werden, mit welchen Konflikten und Spannungsfeldern öffentlich-zivilgesellschaftliche Akteure in Südtirol bei der Etablierung von adaptation-Maßnahmen im Kontext des Klimawandels konfrontiert sind und welche sie selbst (re-)produzieren. Dafür wurden im Frühling 2022 zehn Interviews geführt, welche anhand der Grounded Theory analysiert wurden. Die sich daraus ergebenden Hauptkategorien umschließen ein spezifisches Mensch-Natur- Verhältnis, Aspekte der Katastrophenforschung, hierarchische Spannungsverhältnisse sowie offenen Konflikt. Vor allem im Zuge der Diskussion ergeben diese Kategorien eine Verbindung mit typischen theoretischen Ansätzen der Politischen Ökologie wie beispielsweise der marxistischen Kritik an der Kapitalisierung von Naturverhältnissen oder der diskursiven Machtausübung nach Foucault. Die Arbeit zeigt auf, dass die Klimadebatte in Südtirol noch deutliche Hürden zu bewältigen hat, wobei die wirtschaftliche Abhängigkeit vom Tourismus eine wesentliche Rolle spielt. Die weitere Forschung sowie gesellschaftspolitische Diskussion von adaptation-Maßnahmen ist deshalb von zentraler Bedeutung, um klimabedingte Katastrophen zu vermeiden.
On convergence to the Denjoy-Wolff point in the parabolic case
Creators: name: Ostapyuk, Olena
Publisher: name: arXiv
Year: 2013
Subjects: subject: Complex Variables (math.CV)
subject: FOS: Mathematics
subject: 30D05 (Primary), 32H50 (Secondary)

description: Based on dynamical behavior, all self-maps of the unit disk in the complex plane can be classified as elliptic, hyperbolic or parabolic. The parabolic case is the most complicated one and branches into two subcases - zero-step and non-zero-step cases. In several dimensions, zero-step and non-zero step cases can be defined for sequences of forward iterates, but it is not known yet if the classification can be extended to parabolic maps of the ball. However, some geometric properties of the forward iterates can be generalized to higher-dimensional case.
SYNTHESIS AND PRODUCTION OF LACTIC ACID (LA) FROM FALSE BANANA/BULA USING LACTOBACILLUS PLANTARIUM
Creators: name: YONAS ABATE
Publisher: name: Zenodo
Year: 2016

description: The production of lactic acid from was optimized by central composite design, using bulla

starch as carbon sources and MRS as yeast extract, meat extract, peptone and glucose source

using Lactobacillus Plantarium. The fermentation were performed in 250 mL Erlenmeyer flasks

containing 100 mL of MRS medium, maintained at 200 rpm, 40 g/l of starch (carbon source) , at

temperature range from 30 °C to 40° C , pH 5 to 7 and time between 48 hours to 72 hours. The

first two (agitation speed 200 rpm and carbon source 40 g/l) were set as constant. After data was

analyzed by response surface method, it was revealed that Lactic acid production was

significantly affected by temperature, time and pH of the samples. At central point of all factors:

temperature 35 °C, time 60 hours and pH 6.25 maximal production of lactic acid was 17.09 g/L.