cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Loop groups in Yang-Mills theory
Creators: name: Popov, Alexander D.
Publisher: name: Amsterdam : Elsevier
Year: 2015
Subjects: subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: We consider the Yang-Mills equations with a matrix gauge group G on the de Sitter dS4, anti-de Sitter AdS4 and Minkowski R3,1R3,1 spaces. On all these spaces one can introduce a doubly warped metric in the form View the MathML sourceds2=−du2+f2dv2+h2dsH22, where f and h are the functions of u and View the MathML sourcedsH22 is the metric on the two-dimensional hyperbolic space H2H2. We show that in the adiabatic limit, when the metric on H2H2 is scaled down, the Yang–Mills equations become the sigma-model equations describing harmonic maps from a two-dimensional manifold (dS2, AdS2 or R1,1R1,1, respectively) into the based loop group ΩG=C∞(S1,G)/GΩG=C∞(S1,G)/G of smooth maps from the boundary circle S1=∂H2S1=∂H2 of H2H2 into the gauge group G. For compact groups G these harmonic map equations are reduced to equations of geodesics on ΩG, solutions of which yield magnetic-type configurations of Yang–Mills fields. The group ΩG naturally acts on their moduli space.
Abelian maximal pattern complexity of words
Creators: name: Kamae, Teturo
name: Widmer, Steven
name: Zamboni, Luca Q.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Combinatorics (math.CO)
subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 68R15

description: In this paper we study the maximal pattern complexity of infinite words up to Abelian equivalence. We compute a lower bound for the Abelian maximal pattern complexity of infinite words which are both recurrent and aperiodic by projection. We show that in the case of binary words, the bound is actually achieved and gives a characterization of recurrent aperiodic words.
title: Lustrzana architektura – studia przypadków. Mirrored architecture – case studies
Creators: name: Kuzia, Wiktoria
Publisher: name: Politechnika Białostocka
Year: 2019

description: streszczenie: Celem artykułu jest analiza zagadnienia związanego z wykorzystaniem efektu lustrzanego odbicia w architekturze. Omówione są tu przykłady projektów i realizacji o wysokich walorach estetycznych i funkcjonalnych, uzyskanych dzięki użyciu luster. autorka koncentruje się na motywach determinujących powstawanie lustrzanych obiektów, a także bada ich wpływ na otoczenie, kontekst miejsca i odbiorców. prezentuje również szereg zalet estetycznych, jak i praktycznych, dzięki którym architektura ta staje się integralną częścią środowiska i intensyfikuje relacje z odbiorcą. na podstawie przykładów można  zauważyć  wyraźny  wzrost  tendencji  tworzenia  budynków  o lustrzanych  elewacjach,  co  stanowi  wyraz  poszukiwania nowych aspektów postrzegania architektury.
słowa kluczowe: efekt odbicia; lustra; lustrzana architektura
A model description of the supersolid state in YBCO
Creators: name: Tsvelik, A. M.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: I employ a semiphenomenological model introduced in A. M. Tsvelik, A. V. Chubukov, Phys. Rev. Lett. {\bf 98}, 237001 (2007) to describe the state with co-existing superconductivity (SC) and charge density wave (CDW) recently discovered in YBCO. The SC and the CDW order parameter fields are united in a single pseudospin and can be rotated into each other. It is suggested that disorder creates isolated pseudospins which become centers of inelastic scattering of electrons. It is suggested that this scattering is responsible for the logarithmic upturn in the resistivity $ρ(T) \sim - \ln T$ observed at low doping.
description: 4.5 pages, 1 figure, to appear in Phys. Rev. B, Rapid Communications
Instantons on conical half-flat 6-manifolds
Creators: name: Bunk, Severin
name: Lechtenfeld, Olaf
name: Popov, Alexander D.
name: Sperling, Marcus
Publisher: name: New York : Springer
Year: 2015
Subjects: subject: Solitons Monopoles
subject: Instantons
subject: Flux compactifications
subject: Differential Geometry
subject: Algebraic Geometry
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: We present a general procedure to construct 6-dimensional manifolds with SU(3)-structure from SU(2)-structure 5-manifolds. We thereby obtain half-flat cylinders and sine-cones over 5-manifolds with Sasaki-Einstein SU(2)-structure. They are nearly Kähler in the special case of sine-cones over Sasaki-Einstein 5-manifolds. Both half-flat and nearly Kähler 6-manifolds are prominent in flux compactifications of string theory. Subsequently, we investigate instanton equations for connections on vector bundles over these half-flat manifolds. A suitable ansatz for gauge fields on these 6-manifolds reduces the instanton equation to a set of matrix equations. We finally present some of its solutions and discuss the instanton configurations obtained this way.
title: Teatr Polski w Szczecinie – Transformacja i metamorfoza. Polish Theatre in Szczecin: Transformation and metamorphosis
Creators: name: Loegler, Romuald
Publisher: name: Politechnika Białostocka
Year: 2019

description: StreszczenieZmiana powierzchowności, wyglądu, oznacza transformację, a „bazą” dla transformacji jest synonim greckiego pojęcia – METAMORFOZA. Dziś transformacja opisuje stan przejściowy, momenty towarzyszące przemianie, akcje spełniania się, rozgrywania się procesu, dokonywania się przemiany danego przedmiotu lub podmiotu. Metamorfoza zdaje się być lub jest nawiązaniem do czegoś, wspomnieniem, aluzją do procesu, który jest autonomiczny lub endogenny – pochodzący z wnę-trza, wywołany przez wewnętrzne czynniki. W tym stałym de facto procesie przemian architektura może być porównywana do żywego organizmu, który także podlega wewnętrznej przemianie.Celem artykułu jest wykazanie, że transformacja i metamorfoza to dwie drogi eksplorowania jej najważniejszych produktów, jakimi są miasta! Rezultat transformacji konkretnego fragmentu miasta jest wynikiem procesu projektowego, bazującego na idei kreacji formy w procesie jej uwalniania z istniejącej rzeczywistości - idei, która wyrosła z pięknego zdania Alberta Einsteina: „dla mnie wystarcza misterium wiekuistego życia oraz świadomość i przeczucie wspaniałości budowy tego, co istnieje, tudzież wzniosła dążność do ogarnięcia umysłem najdrobniejszej cząstki mądrości objawiającej się w przyrodzie”[A. Einstein 1935, s. 15].
Słowa kluczowe: proces; transformacja; metamorfoza; architektura; obiekt architektury
Ein herausragendes neolithisches Jadebeil aus Hiddenhausen-Bermbeck
Creators: name: Klassen, Lutz
name: Pétrequin, Pierre
name: Errera, Michel
Publisher: name: Archäologie in Westfalen-Lippe
Year: 2016

description: -
description: Archäologie in Westfalen-Lippe, ARCHÄOLOGIE IN WESTFALEN-LIPPE 2009 (2010)
Genetic algorithms for finding the weight enumerator of binary linear block codes
Creators: name: Nouh, Said
name: Belkasmi, Mostafa
Publisher: name: arXiv
Year: 2013
Subjects: subject: Information Theory (cs.IT)
subject: Neural and Evolutionary Computing (cs.NE)
subject: FOS: Computer and information sciences

description: In this paper we present a new method for finding the weight enumerator of binary linear block codes by using genetic algorithms. This method consists in finding the binary weight enumerator of the code and its dual and to create from the famous MacWilliams identity a linear system (S) of integer variables for which we add all known information obtained from the structure of the code. The knowledge of some subgroups of the automorphism group, under which the code remains invariant, permits to give powerful restrictions on the solutions of (S) and to approximate the weight enumerator. By applying this method and by using the stability of the Extended Quadratic Residue codes (ERQ) by the Projective Special Linear group PSL2, we find a list of all possible values of the weight enumerators for the two ERQ codes of lengths 192 and 200. We also made a good approximation of the true value for these two enumerators.
sj-docx-1-asm-10.1177_10731911231204831 – Supplemental material for Development and Validation of a New Measurement Scale for Existential Loneliness
Creators: name: Hadeei, Sohrab
Publisher: name: figshare
Year: 2023
Subjects: classificationCode: 529999
subject: Other psychology not elsewhere classified
classificationCode: 441006
subject: Sociological methodology and research methods

description: Supplemental material, sj-docx-1-asm-10.1177_10731911231204831 for Development and Validation of a New Measurement Scale for Existential Loneliness by Sohrab Hadeei in Assessment 
Sigma-model limit of Yang–Mills instantons in higher dimensions
Creators: name: Deser, Andreas
name: Lechtenfeld, Olaf
name: Popov, Alexander D.
Publisher: name: Amsterdam : Elsevier Science BV
Year: 2015
Subjects: subject: high energy physics
subject: theory
subject: mathematical physics
subject: mathematics
subject: differential geometry
subject: stable vector-bundles
subject: chern-simons theory
subject: greater-than 4
subject: gauge-theory
subject: calibrated geometry
subject: holonomy manifolds
subject: fields
subject: equations
subject: connections
subject: reduction
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: We consider the Hermitian Yang–Mills (instanton) equations for connections on vector bundles over a 2n-dimensional Kähler manifold Xwhich is a product Y×Zof p-and q-dimensional Riemannian manifold Yand Zwith p+q=2n. We show that in the adiabatic limit, when the metric in the Zdirection is scaled down, the gauge instanton equations on Y×Zbecome sigma-model instanton equations for maps from Yto the moduli space M(target space) of gauge instantons on Zif q≥4. For q<4we get maps from Yto the moduli space Mof flat connections on Z. Thus, the Yang–Mills instantons on Y×Zconverge to sigma-model instantons on Ywhile Zshrinks to a point. Put differently, for small volume of Z, sigma-model instantons on Ywith target space Mapproximate Yang–Mills instantons on Y×Z.
On tempered and square integrable representations of classical p-adic groups
Creators: name: Tadic, Marko
Publisher: name: arXiv
Year: 2012
Subjects: subject: Representation Theory (math.RT)
subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 22E50, 22E55 (Primary) 11F70, 11S37 (Secondary)

description: This paper has two aims. The first is to give a description of irreducible tempered representations of classical p-adic groups which follows naturally the classification of irreducible square integrable representations modulo cuspidal data obtained by C. Moeglin and the author. The second aim of the paper is to give description of an invariant (partially defined function) of irreducible square integrable representation of a classical p-adic group (defined by C. Moeglin using embeddings) in terms of subquotients of Jacquet modules. As an application, we describe behavior of partially defined function in one construction of square integrable representations of a bigger group from such representations of a smaller group (which is related to deformation of Jordan blocks of representations).
description: 58 pages
Nonlinear supersymmetry in the quantum Calogero model
Creators: name: Correa, Francisco
name: Lechtenfeld, Olaf
name: Plyushchay, Mikhail
Publisher: name: New York : Springer
Year: 2014
Subjects: subject: Integrable Equations
subject: Conformal Symmetry
subject: W Symmetry
subject: Extended Supersymmetry
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: It is long known that the rational Calogero model describing n identical particles on a line with inverse-square mutual interaction potential is quantum superintegrable. We review the (nonlinear) algebra of the conserved quantum charges and the intertwiners which relate the Liouville charges at couplings g and g±1. For integer values of g, these intertwiners give rise to additional conserved charges commuting with all Liouville charges and known since the 1990s. We give a direct construction of such a charge, the unique one being totally antisymmetric under particle permutations. It is of order 12 n(n−1)(2g−1) in the momenta and squares to a polynomial in the Liouville charges. With a natural Z 2 grading, this charge extends the algebra of conserved charges to a nonlinear supersymmetric one. We provide explicit expressions for intertwiners, charges and their algebra in the cases of two, three and four particles.
Order α′ heterotic domain walls with warped nearly Kähler geometry
Creators: name: Haupt, Alexander S.
name: Lechtenfeld, Olaf
name: Musaev, Edvard T.
Publisher: name: New York : Springer
Year: 2014
Subjects: subject: Flux compactifications
subject: Solitons Monopoles
subject: Instantons
subject: Supergravity Models
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: We consider (1+3)-dimensional domain wall solutions of heterotic supergravity on a six-dimensional warped nearly Kähler manifold X 6 in the presence of gravitational and gauge instantons of tanh-kink type as constructed in [1]. We include first order α′ corrections to the heterotic supergravity action, which imply a non-trivial Yang-Mills sector and Bianchi identity. We present a variety of solutions, depending on the choice of instantons, for the special case in which the SU(3) structure on X 6 satisfies W1¯¯¯=0. The solutions preserve two real supercharges, which corresponds to N=1/2 supersymmetry from the four-dimensional point of view. Besides serving as a useful framework for collecting existing solutions, the formulation in terms of dynamic SU(3) structures utilized here allows us to obtain new solutions in as yet unexplored corners of the instanton configuration space. Our approach thus offers a unified description of the embedding of tanh-kink-type instantons into half-BPS solutions of heterotic supergravity where the internal six-dimensional manifold has a warped nearly Kähler geometry.
What is ... Equivariant Cohomology?
Creators: name: Tu, Loring W.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Algebraic Topology (math.AT)
subject: FOS: Mathematics
subject: 55N25, 55N91

description: When a torus acts on a compact oriented manifold with isolated fixed points, the equivariant localization formula of Atiyah--Bott--Berline--Vergne converts the integral of an equivariantly closed form to a finite sum over the fixed points, providing a powerful tool for computing integrals on a manifold. This article seeks to give an accessible exposition of the equivariant localization formula.
description: 4 pages, 1 figure, AMS-LaTeX
Rückblick auf das archäologische Jahr 2014 in Westfalen-Lippe
Creators: name: Rind, Michael M.
Publisher: name: Archäologie in Westfalen-Lippe
Year: 2016

description: -
description: Archäologie in Westfalen-Lippe, ARCHÄOLOGIE IN WESTFALEN-LIPPE 2014 (2015)
Quantum corrections in string compactifications on SU(3) structure geometries
Creators: name: Graña, Mariana
name: Louis, Jan
name: Theis, Ulrich
name: Waldram, Daniel
Publisher: name: New York : Springer
Year: 2015
Subjects: subject: Supersymmetric Effective Theories
subject: Flux compactifications
subject: Superstring Vacua
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: We investigate quantum corrections to the classical four-dimensional low-energy effective action of type II string theory compactified on SU(3) structure geometries. Various methods previously developed for Calabi-Yau compactifications are adopted to constrain - under some simple assumptions about the low-energy degrees of freedom - the leading perturbative corrections to the moduli space metrics in both α′ and the string coupling constant. We find that they can be parametrized by a moduli dependent function in the hypermultiplet sector and a constant in the vector multiplet sector. We argue that under specific additional assumption they take - in complete analogy to the Calabi-Yau case - a universal form which depends only on the Euler characteristic of the six-dimensional compact space.
Topological invariants and fibration structure of complete intersection Calabi-Yau four-folds
Creators: name: Gray, James
name: Haupt, Alexander S.
name: Lukas, Andre
Publisher: name: New York : Springer
Year: 2014
Subjects: subject: F-Theory
subject: Differential
subject: Algebraic Geometry
subject: Superstring Vacua
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: We investigate the mathematical properties of the class of Calabi-Yau four-folds recently found in ref. [1]. This class consists of 921,497 configuration matrices which correspond to manifolds that are described as complete intersections in products of projective spaces. For each manifold in the list, we compute the full Hodge diamond as well as additional topological invariants such as Chern classes and intersection numbers. Using this data, we conclude that there are at least 36,779 topologically distinct manifolds in our list. We also study the fibration structure of these manifolds and find that 99.95 percent can be described as elliptic fibrations. In total, we find 50,114,908 elliptic fibrations, demonstrating the multitude of ways in which many manifolds are fibered. A sub-class of 26,088,498 fibrations satisfy necessary conditions for admitting sections. The complete data set can be downloaded here.
PERFORMANCE EVALUATION OF GEOGRID REINFORCED PAVEMENT SUBGRADE USING NUMERICAL ANALYSIS; A CASE OF TERCHA-CHIDA ROAD PROJECT
Creators: name: ADEME TSEGA TASSEW
Publisher: name: Zenodo
Year: 2021

description: One very important issue is the need for significant improvement of flexible pavement structure

passing over areas of poor soil conditions due to continuous deformation and a low bearing

capacity from the pavement structure foundation. One of the general problem happened on

pavement structure are vertical settlement and lateral displacement of the soil layers. In order to

minimize these problems enhancing the bearing capacity of the subgrade soils can be the major

solution. Mostly, the subgrade soil is known by poor bearing capacity, high plasticity and high

swelling factor. So, the bearing capacity of the soils can be improved by geotechnical ground

improvement. In this study, reinforced subgrade performance with geogrid was numerically

analyzed. Two pavement structure with geogrid reinforced subgrade and unreinforced subgrade

were analyzed under the same traffic load and pavement thickness using finite element model.

ABAQUS software package was used as a tool in analyzing the finite element models of a

quarter of pavement structures
Auxiliary tensor fields for Sp(2, R) self-duality
Creators: name: Ivanov, Evgeny A.
name: Lechtenfeld, Olaf
name: Zupnik, Boris M.
Publisher: name: New York : Springer
Year: 2015
Subjects: subject: Duality in Gauge Field Theories
subject: Global Symmetries
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: The coset Sp(2, R)/U(1) is parametrized by two real scalar fields. We generalize the formalism of auxiliary tensor (bispinor) fields in U(1) self-dual nonlinear models of abelian gauge fields to the case of Sp(2, R) self-duality. In this new formulation, Sp(2, R) duality of the nonlinear scalar-gauge equations of motion is equivalent to an Sp(2, R) invariance of the auxiliary interaction. We derive this result in two different ways, aiming at its further application to supersymmetric theories. We also consider an extension to interactions with higher derivatives.
Tailoring Relaxation Time Spectrum in Soft Glassy Materials
Creators: name: Kaushal, Manish
name: Joshi, Yogesh M.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Physical properties of out of equilibrium soft materials depend on time as well as deformation history. In this work we propose to transform this major shortcoming into gain by applying controlled deformation field to tailor the rheological properties. We take advantage of the fact that deformation field of a certain magnitude can prevent particles in an aging soft glassy material from occupying energy wells up to a certain depth, thereby populating only the deeper wells. We employ two soft glassy materials with dissimilar microstructures and demonstrate that increase in strength of deformation field while aging leads to narrowing of spectrum of relaxation times. We believe that, in principle, this philosophy can be universally applied to different kinds of glassy materials by changing nature and strength of impetus.
description: 17 pages, 8 figures, in press
Ein fränkischer Tremissis von der Wüstung Herlethe bei Petershagen-Windheim
Creators: name: Kötz, Stefan
Publisher: name: Archäologie in Westfalen-Lippe
Year: 2016

description: -
description: Archäologie in Westfalen-Lippe, ARCHÄOLOGIE IN WESTFALEN-LIPPE 2014 (2015)
Atrococcus achilleae Kiritschenko
Creators: name: Gavrilov, Ilya A.
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Pseudococcidae
Atrococcus
Atrococcus achilleae

description: Atrococcus achilleae (Kiritschenko)
 K 665, Bulgaria, Western Rhodopes Mts., road above Asenova Krepost fortress, about 1500 m, on roots of undetermined dicotyledonous herb, 22.VI.2009.
description: Published as part of Gavrilov, Ilya A., 2010, Descriptions of two new species of Pseudococcidae (Homoptera: Coccinea) and additions to the scale insect fauna of Bulgaria, pp. 32-40 in Zootaxa 2635 on page 38, DOI: 10.5281/zenodo.198404
Moduli stabilization and cosmology of type IIB on SU(2)-structure orientifolds
Creators: name: Caviezel, Claudio
name: Wrase, Timm
name: Zagermann, Marco
Publisher: name: Heidelberg : Springer Verlag
Year: 2010
Subjects: subject: DS vacua in string theory
subject: Flux compactifications
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: We consider type IIB flux compactifications on six-dimensional SU(2)-structure manifolds with O5- and O7-planes. These six-dimensional spaces allow not only for F 3 and H3 fluxes but also for F 1 and F 5 fluxes. We derive the four-dimensional N = 1 scalar potential for such compactifications and present one explicit example of a fully stabilized AdS vacuum with large volume and small string coupling. We then discuss cosmological aspects of these compactifications and derive several no-go theorems that forbid dS vacua and slow-roll inflation under certain conditions. We also study concrete examples of cosets and twisted tori and find that our no-go theorems forbid dS vacua and slow-roll inflation in all but one of them. For the latter we find a dS critical point with o numerically zero. However, the point has two tachyons and eta-parameter n ̃-3.1.
Aspherical manifolds that cannot be triangulated
Creators: name: Davis, Michael W.
name: Fowler, Jim
name: Lafont, Jean-François
Publisher: name: arXiv
Year: 2013
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 57Q15, 57Q25, 20F65 (Primary), 57R58 (Secondary)

description: Although Kirby and Siebenmann showed that there are manifolds that do not admit PL structures, the possibility remained that all manifolds could be triangulated. In the late seventies Galewski and Stern and independently Matumoto showed that non-triangulable manifolds exist in all dimensions > 4 if and only if homology 3-spheres with certain properties do not exist. In 2013 Manolescu showed that, indeed, there were no such homology 3-spheres and hence, non-triangulable manifolds exist in each dimension >4. It follows from work of Freedman in 1982 that there are 4-manifolds that cannot be triangulated. In 1991 Davis and Januszkiewicz applied a hyperbolization procedure to Freedman's 4-manifolds to get closed aspherical 4-manifolds that cannot be triangulated. In this paper we apply hyperbolization techniques to the Galewski-Stern manifolds to show that there exist closed aspherical n-manifolds that cannot be triangulated for each n> 5. The question remains open in dimension 5.
description: 9 pages
Puto superbus Leonardi
Creators: name: Gavrilov, Ilya A.
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Pseudococcidae
Puto
Puto superbus

description: Puto superbus (Leonardi)
 K 584, Bulgaria, Rila Mts., mountain road to Khristakiev Prostor Peak, about 1600 m., 20.VII.2008.
description: Published as part of Gavrilov, Ilya A., 2010, Descriptions of two new species of Pseudococcidae (Homoptera: Coccinea) and additions to the scale insect fauna of Bulgaria, pp. 32-40 in Zootaxa 2635 on page 38, DOI: 10.5281/zenodo.198404
Dülmens Frühgeschichte im Spiegel der archäologischen Untersuchungen am Kirchplatz
Creators: name: Essling-Wintzer, Wolfram
name: Kneppe, Cornelia
Publisher: name: Archäologie in Westfalen-Lippe
Year: 2016

description: -
description: Archäologie in Westfalen-Lippe, ARCHÄOLOGIE IN WESTFALEN-LIPPE 2014 (2015)
Precision spectroscopy by photon-recoil signal amplification
Creators: name: Wan, Yong
name: Gebert, Florian
name: Wuebbena, Jannes B.
name: Scharnhorst, Nils
name: Amairi, Sana
name: Leroux, Ian D.
name: Hemmerling, Boerge
name: Loerch, Niels
name: Hammerer, Klemens
name: Schmidt, Piet O.
Publisher: name: London : Nature Publishing Group
Year: 2014
Subjects: subject: laser spectroscopy
subject: frequency comb
subject: trapped ions
subject: quantum
subject: dynamics
subject: proton
subject: Dewey Decimal Classification::500 | Naturwissenschaften

description: Precision spectroscopy of atomic and molecular ions offers a window to new physics, but is typically limited to species with a cycling transition for laser cooling and detection. Quantum logic spectroscopy has overcome this limitation for species with long-lived excited states. Here we extend quantum logic spectroscopy to fast, dipole-allowed transitions and apply it to perform an absolute frequency measurement. We detect the absorption of photons by the spectroscopically investigated ion through the photon recoil imparted on a co-trapped ion of a different species, on which we can perform efficient quantum logic detection techniques. This amplifies the recoil signal from a few absorbed photons to thousands of fluorescence photons. We resolve the line centre of a dipole-allowed transition in Ca-40(+) to 1/300 of its observed linewidth, rendering this measurement one of the most accurate of a broad transition. The simplicity and versatility of this approach enables spectroscopy of many previously inaccessible species.
Carex longifolia
Creators: name: Becherer
Publisher: name: Zenodo
Year: 1956
Subjects: Biodiversity
Taxonomy

description: M. longifolia X rotundifolia (=M. niliaca Jacq., M. villosa Hudson, M. nemorosa, Willd.) Cat. 284; 436 (auctore Briquet). Var. Tenorii (Perard) Gams - 2: Zwischen Creux du Loup und Tassonnieres, ob Fully, ohne M. rotundifolia (J.).
description: Published as part of Becherer, 1956, Florae Vallesiacae Supplementum, pp. 1-556 in Denkschriften der Schweizerischen Naturforschenden Gesellschaft 71 on pages 1-556
Highly-efficient extraction of entangled photons from quantum dots using a broadband optical antenna
Creators: name: Chen, Yan
name: Zopf, Michael
name: Keil, Robert
name: Ding, Fei
name: Schmidt, Oliver G.
Publisher: name: London : Nature Publishing Group
Year: 2018
Subjects: subject: Photons
subject: Quantum dots
subject: Quantum photonic technologies
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: Many quantum photonic technologies require the efficient generation of entangled pairs of photons, but to date there have been few ways to produce them reliably. Sources based on parametric down conversion operate at very low efficiency per pulse due to the probabilistic generation process. Semiconductor quantum dots can emit single pairs of entangled photons deterministically but they fall short due to the extremely low-extraction efficiency. Strategies for extracting single photons from quantum dots, such as embedding them in narrowband optical cavities, are difficult to translate to entangled photons. Here, we build a broadband optical antenna with an extraction efficiency of 65% ± 4% and demonstrate a highly-efficient entangled-photon source by collecting strongly entangled photons (fidelity of 0.9) at a pair efficiency of 0.372 ± 0.002 per pulse. The high brightness achieved by our source represents a step forward in the development of optical quantum technologies.
Balanococus balkanicus Gavrilov, sp. n.
Creators: name: Gavrilov, Ilya A.
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Pseudococcidae
Balanococus
Balanococus balkanicus

description: Balanococus balkanicus Gavrilov sp. n.
(Fig. 1)
 Adult female. Unmounted appearance. Live female violet, covered by powdery wax.
 Mounted material. Body elongate, broadest posteriorly, about 4.5 mm long and 2 mm wide. Eyes each about 25 μm in diameter. Antennae each 7 segmented, 240–250 μm long. Legs small; trochanter + femur 140– 150 μm; tibia + tarsus about 120–150 μm. Hind coxae with numerous translucent pores. Claw about 20 μm long, without denticle. Claw digitules and tarsal digitules longer then claw, capitate. Two pairs of ostioles present. Circuli four in number, large, broadly oval or even quadrate in shape. Anal ring round, about 80 μm in diameter, with outer row of spinules and inner row of oval cells. Multilocular pores each with 10 loculi and about 8 μm in diameter, forming transverse rows on posterior 4 abdominal segments and in a band along body margin. Trilocular pores, each about 4 μm in diameter, present throughout both body surfaces. Simple discoidal pores, each about 3 μm in diameter, present sparsely on both surfaces of body. Tubular ducts of two size, both with a collar; large ducts each 7 μm long and 4 μm wide, forming groups along abdominal margin and in a band along dorsal margin of thorax and head; smaller ducts each 6 μm long and 3 μm wide, present mainly medially on posterior five abdominal segments. Only one pair of cerarii present – С18, with two thin conical attenuated setae and several trilocular pores. In place of С17, one conical seta similar with that in С18 present. Body setae short and thin.
 Taxomomic notes. The new species is similar with B. boratynskii Williams, 1962, but differs in the presence of four large circuli and two sizes of tubular ducts. For keys and descriptions of the other Palaearctic Balanococcus species, see Danzig (1998) and Kwon et al. (2003).
 Material examined. Holotype Ƥ: K 572, Bulgaria, Vitosha, 1820 m, subalpine meadow, under the leaf sheaths of undetermined Poaceae, 6.VII. 2008; paratype Ƥ, the same data.
 Etymology. The species is named after the geographic region, the Balkans.
description: Published as part of Gavrilov, Ilya A., 2010, Descriptions of two new species of Pseudococcidae (Homoptera: Coccinea) and additions to the scale insect fauna of Bulgaria, pp. 32-40 in Zootaxa 2635 on page 33, DOI: 10.5281/zenodo.198404
Matrix heater in the gravitational wave observatory GEO 600
Creators: name: Wittel, H.
name: Affeldt, Christoph
name: Bisht, A.
name: Doravari, S.
name: Grote, Hartmut
name: Lough, J.
name: Lück, Harald
name: Schreiber, E.
name: Strain, K.A.
name: Danzmann, Karsten
Publisher: name: Washington, DC : Optical Society of America
Year: 2018
Subjects: subject: Gravitational effects
subject: Heating
subject: Laser interferometry
subject: Light
subject: Light absorption
subject: Orbits
subject: Design sensitivity
subject: Gravitational wave detectors
subject: Gravitational-wave observatory
subject: High quality optics
subject: Higher-order modes
subject: Large scale lasers
subject: Surface imperfections
subject: Thermal projection systems
subject: Gravity waves
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: Large scale laser interferometric gravitational wave detectors (GWDs), such as GEO 600 require high quality optics to reach their design sensitivity. The inevitable surface imperfections, inhomogeneities, and light-absorption induced thermal lensing in the optics, can convert laser light from the fundamental mode to unwanted higher order modes, and pose challenges to the operation and sensitivity of the GWDs. Here we demonstrate the practical implementation of a thermal projection system which reduces those unwanted effects via targeted spatial heating of the optics. The thermal projector consists of 108 individually addressable heating elements which are imaged onto the beam splitter of GEO 600. We describe the optimization of the spatial heating profile and present the obtained results. Journal © 2018.
GasLib - A Library of Gas Network Instances
Creators: name: Schmidt, Martin
name: Assmann, Denis
name: Burlacu, Robert
name: Humpola, Jesco
name: Joormann, Imke
name: Kanelakis, Nikolaos
name: Koch, Thorsten
name: Oucherif, Djamal
name: Pfetsch, Marc E.
name: Schewe, Lars
name: Schwarz, Robert
name: Sirvent, Mathias
Publisher: name: Basel : MDPI AG
Year: 2017
Subjects: subject: gas transport
subject: networks
subject: problem instances
subject: mixed-integer nonlinear optimization
subject: GasLib
subject: Dewey Decimal Classification::500 | Naturwissenschaften::510 | Mathematik

description: The development of mathematical simulation and optimization models and algorithms for solving gas transport problems is an active field of research. In order to test and compare these models and algorithms, gas network instances together with demand data are needed. The goal of GasLib is to provide a set of publicly available gas network instances that can be used by researchers in the field of gas transport. The advantages are that researchers save time by using these instances and that different models and algorithms can be compared on the same specified test sets. The library instances are encoded in an XML (extensible markup language) format. In this paper, we explain this format and present the instances that are available in the library.
Shear and Bulk Viscosities of a Weakly Coupled Quark Gluon Plasma with Finite Chemical Potential and Temperature---Leading-Log Results
Creators: name: Chen, Jiunn-Wei
name: Liu, Yen-Fu
name: Song, Yu-Kun
name: Wang, Qun
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Theory (hep-th)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We calculate the shear (eta) and bulk (zeta) viscosities of a weakly coupled quark gluon plasma at the leading-log order with finite temperature T and quark chemical potential mu. We find that the shear viscosity to entropy density ratio eta/s increases monotonically with mu and eventually scales as (mu/T)^2 at large mu. In contrary, zeta/s is insensitive to mu. Both eta/s and zeta/s are monotonically decreasing functions of the quark flavor number N_f when N_f \geq 2. This property is also observed in pion gas systems. Our perturbative calculation suggests that QCD becomes the most perfect (i.e. with the smallest eta/s) at mu=0 and N_f = 16 (the maximum N_f with asymptotic freedom). It would be interesting to test whether the currently smallest eta/s computed close to the phase transition with mu=0 and N_f = 0 can be further reduced by increasing N_f.
description: 19 pages, 5 figures
Energy cost of entanglement extraction in complex quantum systems
Creators: name: Bény, Cédric
name: Chubb, Christopher T.
name: Farrelly, Terry
name: Osborne, Tobias J.
Publisher: name: London : Nature Publishing Group
Year: 2018
Subjects: subject: article
subject: energy cost
subject: extraction
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: What is the energy cost of extracting entanglement from complex quantum systems? Operationally, we may wish to actually extract entanglement. Conceptually, we may wish to physically understand the entanglement distribution as a function of energy. This is important, especially for quantum field theory vacua, which are extremely entangled. Here we build a theory to understand the energy cost of entanglement extraction. First, we consider a toy model, and then we define the entanglement temperature, relating energy cost to extracted entanglement. Next, we give a physical argument quantifying the energy cost of entanglement extraction in some quantum field vacua. There the energy cost depends on the spatial dimension: in one dimension, for example, it grows exponentially with extracted entanglement. Next, we provide approaches to bound the energy cost of extracting entanglement more generally. Finally, we look at spin chain models numerically to calculate the entanglement temperature using matrix product states.
Quantum Gross-Pitaevskii Equation
Creators: name: Haegeman, Jutho
name: Draxler, Damian
name: Stojevic, Vid
name: Cirac, J. Ignacio
name: Osborne, Tobias J.
name: Verstraete, Frank
Publisher: name: Amsterdam : SciPost Foundation
Year: 2017
Subjects: subject: Bose-Einstein Condensation
subject: Nonlinear Schrodinger- Equations
subject: Density - Matrix Renormalisation
subject: Tonks - Girardeau Gas
subject: Impenetrable Bosons
subject: Traps
subject: Dynamics
subject: Vortrex
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: We introduce a non-commutative generalization of the Gross-Pitaevskii equation for one-dimensional quantum gasses and quantum liquids. This generalization is obtained by applying the time-dependent variational principle to the variational manifold of continuous matrix product states. This allows for a full quantum description of many body system - including entanglement and correlations-and thus extends significantly beyond the usual mean-field description of the Gross-Pitaevskii equation, which is known to fail for (quasi) one-dimensional systems. By linearizing around a stationary solution, we furthermore derive an associated generalization of the Bogoliubov - de Gennes equations. This framework is applied to compute the steady state response amplitude to a periodic perturbation of the potential.
Holthusen – lokales Zentrum adliger Grundherrschaft im Diemelraum
Creators: name: Lagers, Michael
name: Peine, Hans-Werner
name: Sikorski, Beate
Publisher: name: Archäologie in Westfalen-Lippe
Year: 2016

description: -
description: Archäologie in Westfalen-Lippe, ARCHÄOLOGIE IN WESTFALEN-LIPPE 2014 (2015)
Tief im Westen – neue Grabungen am Haus Weitmar in Bochum
Creators: name: Eggenstein, Georg
name: Essling-Wintzer, Wolfram
Publisher: name: Archäologie in Westfalen-Lippe
Year: 2016

description: -
description: Archäologie in Westfalen-Lippe, ARCHÄOLOGIE IN WESTFALEN-LIPPE 2014 (2015)
Eiszeitliche Tierknochen aus dem neuen Abwassersystem des Ruhrgebietes
Creators: name: Quenders, Thorsten
name: Senczek, Sebastian
name: Baales, Michael
name: Stapel, Bernhard
Publisher: name: Archäologie in Westfalen-Lippe
Year: 2016

description: -
description: Archäologie in Westfalen-Lippe, ARCHÄOLOGIE IN WESTFALEN-LIPPE 2014 (2015)
Generalized two-field α-attractor models from geometrically finite hyperbolic surfaces
Creators: name: Lazaroiu, C.I.
name: Shahbazi, C.S.
Publisher: name: Amsterdam : Elsevier B.V.
Year: 2018
Subjects: subject: non-linear sigma model
subject: scalar manifolds
subject: FLRW
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: We consider four-dimensional gravity coupled to a non-linear sigma model whose scalar manifold is a non-compact geometrically finite surface Σ endowed with a Riemannian metric of constant negative curvature. When the space-time is an FLRW universe, such theories produce a very wide generalization of two-field α-attractor models, being parameterized by a positive constant α, by the choice of a finitely-generated surface group Γ⊂PSL(2,R) (which is isomorphic with the fundamental group of Σ) and by the choice of a scalar potential defined on Σ. The traditional two-field α-attractor models arise when Γ is the trivial group, in which case Σ is the Poincaré disk. We give a general prescription for the study of such models through uniformization in the so-called “non-elementary” case and discuss some of their qualitative features in the gradient flow approximation, which we relate to Morse theory. We also discuss some aspects of the SRST approximation in these models, showing that it is generally not well-suited for studying dynamics near cusp ends. When Σ is non-compact and the scalar potential is “well-behaved” at the ends, we show that, in the naive local one-field truncation, our generalized models have the same universal behavior as ordinary one-field α-attractors if inflation happens near any of the ends of Σ where the extended potential has a local maximum, for trajectories which are well approximated by non-canonically parameterized geodesics near the ends; we also discuss spiral trajectories near the ends. Generalized two field α-attractors illustrate interesting consequences of nonlinear sigma models whose scalar manifold is not simply connected. They provide a large class of tractable cosmological models with non-trivial topology of the scalar field space.
Burg und Wegesperre im Eggegebirge bei Warburg-Borlinghausen
Creators: name: Bergmann, Rudolf
Publisher: name: Archäologie in Westfalen-Lippe
Year: 2016

description: -
description: Archäologie in Westfalen-Lippe, ARCHÄOLOGIE IN WESTFALEN-LIPPE 2014 (2015)
Hyperkähler manifolds of curves in twistor spaces?
Creators: name: Bielawski, Roger
Publisher: name: Kiev : NAS Institute of Mathematics
Year: 2014
Subjects: subject: Hypercomplex structures
subject: Hyperkähler metrics
subject: Projective curves
subject: Twistor methods
subject: Dewey Decimal Classification::500 | Naturwissenschaften::510 | Mathematik
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: We discuss hypercomplex and hyperkähler structures obtained from higher degree curves in complex spaces fibring over P1.
Detection of Gamma-Ray Emission in the Region of the Supernova Remnants G296.5+10.0 and G166.0+4.3
Creators: name: Araya, Miguel
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: 52 months of accumulated observations by the Large Area Telescope onboard the Fermi Gamma-ray Space Telescope in the region of the supernova remnants G296.5+10.0 (PKS 1209-51/52) and G166.0+4.3 (VRO 42.05.01) are analyzed. GeV emission is detected coincident with the position of the sources at the 5-sigma and 11-sigma levels above the background, respectively, for the best-fit spectral and spatial scenarios. The gamma-ray spectrum of the sources can be described with a power-law in energy. G166.0+4.3 shows a soft GeV spectrum while that of G296.5+10.0 is flat (in the "nu-Fnu" representation). The origin of the gamma-ray emission from the sources is explored. Both leptonic and hadronic mechanisms can account for the high-energy emission from G296.5+10.0, while a leptonic scenario is preferred for G166.0+4.3.
description: Accepted for publication to MNRAS, 19 pages, 4 figures
On deforming a sector of a circular cylindrical tube into an intact tube: existence, uniqueness, and stability
Creators: name: Destrade, Micehl
name: Murphy, Jerry G.
name: Ogden, Ray W.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Within the context of finite deformation elasticity theory the problem of deforming an open sector of a thick-walled circular cylindrical tube into a complete circular cylindrical tube is analyzed. The analysis provides a means of estimating the radial and circumferential residual stress present in an intact tube, which is a problem of particular concern in dealing with the mechanical response of arteries. The initial sector is assumed to be unstressed and the stress distribution resulting from the closure of the sector is then calculated in the absence of loads on the cylindrical surfaces. Conditions on the form of the elastic strain-energy function required for existence and uniqueness of the deformed configuration are then examined. Finally, stability of the resulting finite deformation is analyzed using the theory of incremental deformations superimposed on the finite deformation, implemented in terms of the Stroh formulation. The main results are that convexity of the strain energy as a function of a certain deformation variable ensures existence and uniqueness of the residually-stressed intact tube, and that bifurcation can occur in the closing of thick, widely opened sectors, depending on the values of geometrical and physical parameters. The results are illustrated for particular choices of these parameters, based on data available in the biomechanics literature.
On evaluation of the mean service cycle time in tandem queueing systems
Creators: name: Krivulin, N. K.
name: Nevzorov, V. B.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Optimization and Control (math.OC)
subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 68M20 (Primary) 90B22, 37A30, 60K25 (Secondary)

description: The problem of exact evaluation of the mean service cycle time in tandem systems of single-server queues with both infinite and finite buffers is considered. It is assumed that the interarrival and service times of customers form sequences of independent and identically distributed random variables with known mean values. We start with tandem queues with infinite buffers, and show that under the above assumptions, the mean cycle time exists. Furthermore, if the random variables which represent interarrival and service times have finite variance, the mean cycle time can be calculated as the maximum out from the mean values of these variables. Finally, obtained results are extended to evaluation of the mean cycle time in particular tandem systems with finite buffers and blocking.
description: 12 pages. ISBN 1-56072-923-6
On the automorphisms of a rank one Deligne-Hitchin moduli space
Creators: name: Biswas, Indranil
name: Heller, Sebastian
Publisher: name: Kiev : Institute of Mathematics of National Academy of Sciences of Ukraine
Year: 2017
Subjects: subject: Deligne-Hitchin moduli space
subject: Hodge moduli space
subject: Moishezon twistor space
subject: λ-connections
subject: Dewey Decimal Classification::500 | Naturwissenschaften::510 | Mathematik

description: Let X be a compact connected Riemann surface of genus g ≥ 2, and let MDHbe the rank one Deligne-Hitchin moduli space associated to X. It is known that MDHis the twistor space for the hyper-Kähler structure on the moduli space of rank one holomorphic connections on X. We investigate the group Aut(MDH) of all holomorphic automorphisms of MDH. The connected component of Aut (MDH) containing the identity automorphism is computed. There is a natural element of H2(MDH;ℤ). We also compute the subgroup of Aut(MDH) that fixes this second cohomology class. Since MDHadmits an ample rational curve, the notion of algebraic dimension extends to it by a theorem of Verbitsky. We prove that MDH is Moishezon. © 2017, Institute of Mathematics. All rights reserved.