cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Semantically Secure Lattice Codes for the Gaussian Wiretap Channel
Creators: name: Ling, Cong
name: Luzzi, Laura
name: Belfiore, Jean-Claude
name: Stehlé, Damien
Publisher: name: arXiv
Year: 2012
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: We propose a new scheme of wiretap lattice coding that achieves semantic security and strong secrecy over the Gaussian wiretap channel. The key tool in our security proof is the flatness factor which characterizes the convergence of the conditional output distributions corresponding to different messages and leads to an upper bound on the information leakage. We not only introduce the notion of secrecy-good lattices, but also propose the {flatness factor} as a design criterion of such lattices. Both the modulo-lattice Gaussian channel and the genuine Gaussian channel are considered. In the latter case, we propose a novel secrecy coding scheme based on the discrete Gaussian distribution over a lattice, which achieves the secrecy capacity to within a half nat under mild conditions. No \textit{a priori} distribution of the message is assumed, and no dither is used in our proposed schemes.
description: Submitted to IEEE Trans. Information Theory, Sept. 2012; revised, Oct. 2013
Ellen J. Beer, Beiträge zur oberrheinischen Buchmalerei in der ersten Hälfte des 14. Jahrhunderts unter besonderer Berücksichtigung der Initialornamentik - Deutsche Bilderbibel aus dem späteren Mittelalter
Creators: name: Schmidt, Gerhard
Publisher: name: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Year: 2019

description: Rezension zu: Ellen J. Beer, Beiträge zur oberrheinischen Buchmalerei in der ersten Hälfte des 14. Jahrhunderts unter besonderer Berücksichtigung der Initialornamentik. Birkhäuser Verlag, Basel 1959. 128 S. mit mehreren Strichzeichnungen im Text; 94 Abb. auf 68 Tafeln, 1 Farbtafel. Deutsche Bilderbibel aus dem späteren Mittelalter. Handschrift 334 der Universitätsbibliothek Freiburg i. Br. und M. 719//720 der Pierpont Morgan Library New York. Herausgegeben von Josef Hermann Beckmann und Ingeborg Schroth. Jan Thorbecke Verlag, Konstanz 1960. 108 Tafeln; Textheft m. 30 S. Einführung u. 18 Abb.
description: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege, Bd. 14 Nr. 2 (1961): Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Tafeln
Creators: name: Redaktion, Die
Publisher: name: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Year: 2019

description: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege, Bd. 14 Nr. 2 (1961): Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Siedlung und Verfassung der Slawen zwischen Elbe, Saale und Oder
Creators: name: Struve, Karl Willhelm
Publisher: name: Nachrichten aus Niedersachsens Urgeschichte
Year: 2019

description: Rezension zu: Siedlung und Verfassung der Slawen zwischen Elbe, Saale und Oder. In Verbindung mit H. Jankuhn, W. Schlesinger und E. Schwarz herausgegeben von Herbert Ludat. 226 Seit., 20 z. T. farbige Karten und Deckblätter. Wilhelm Schmitz Verlag Gießen 1960
description: Nachrichten aus Niedersachsens Urgeschichte, Bd. 30 (1961): Nachrichten aus Niedersachsens Urgeschichte
Brøndsted, Johannes: Nordische Vorzeit
Creators: name: Wegewitz, Willi
Publisher: name: Nachrichten aus Niedersachsens Urgeschichte
Year: 2019

description: Rezension zu: Brøndsted, Johannes: Nordische Vorzeit. Band 1. Steinzeit in Dänemark, Karl Wachholtz Verlag Neumünster, 1960. 80, 5 Lfg., 408 Seiten, mit zahlreichen Abbildungen und Tafeln.
description: Nachrichten aus Niedersachsens Urgeschichte, Bd. 30 (1961): Nachrichten aus Niedersachsens Urgeschichte
title: Heidelberger Jahrbücher Online, Bd. 4 (2019): Schönheit: Die Sicht der Wissenschaft
title: Schönheit: Die Sicht der Wissenschaft
titleType: AlternativeTitle
Creators: name: Heidelberger Jahrbücher Online
Publisher: name: Heidelberger Jahrbücher Online
Year: 2019

description: Schönheit ist spätestens seit der Antike ein Thema für Kunst und Wissenschaft. Ist Schönheit überhaupt eine Kategorie für die Wissenschaften und existiert gar eine evolutionäre Grundlage? Gibt es schöne Formeln, schöne Theorien oder schöne Daten? Und wenn ja: lässt sich das Konzept der Schönheit in verschiedenen Disziplinen überhaupt konkret fassen? Der von Joachim Funke und Michael Wink herausgegebene Band beleuchtet das Themenfeld. Insgesamt neun Kapitel von zwölf Autorinnen und Autoren aus Medizin, Geistes-, Kultur- und Naturwissenschaften erörtern den Gegenstand aus den jeweiligen Perspektiven.
description: Titel Inhalt Vorwort...1-4 Schönheit aus evolutionärer Sicht...5-14 Symmetrien...15-38 Ästhetische Ökonomie in der Gestalt der Pflanzen...39-90 Schön versus hässlich. Zur Stigmatisierung des Fremden in der Klassischen Antike...91-131 Gebräunte Haut als Schönheitsideal...133-147 Wie schön darf Gorgo sein? Die widersprüchliche Ästhetik der griechischen Kunst und Lebenskultur...149-187 Die verborgene Schönheit der Natur: die Sicht des Physikers...189-212 Schönheit aus psychologischer Sicht...213-223 Die Schönheit der Statistik...225-247
Signature and spectral flow of $J$-unitary $S^1$-Fredholm operators
Creators: name: Schulz-Baldes, Hermann
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mathematical Physics (math-ph)
subject: Functional Analysis (math.FA)
subject: Spectral Theory (math.SP)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: Operators conserving the indefinite scalar product on a Krein space $(K,J)$ are called $J$-unitary. Such an operator $T$ is defined to be $S^1$-Fredholm if $T-z$ is Fredholm for all $z$ on the unit circle $S^1$, and essentially $S^1$-gapped if there is only discrete spectrum on $S^1$. For paths in the $S^1$-Fredholm operators an intersection index similar to the Conley-Zehnder index is introduced. The strict subclass of essentially $S^1$-gapped operators has a countable number of components which can be distinguished by a homotopy invariant given by the signature of $J$ restricted to the eigenspace of all eigenvalues on $S^1$. These concepts are illustrated by several examples.
description: Final version to appear in Integral Equation and Operator Theory
On the Local $Tb$ Theorem: A Direct Proof under Duality Assumption
Creators: name: Lacey, Michael T.
name: Vähäkangas, Antti V.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics
subject: 42B20 (Primary) 42B25, 42B35 (Secondary)

description: We give a direct proof of the local $Tb$ Theorem, in the Euclidean setting, and under the assumption of dual exponents. This Theorem provides a flexible framework for proving the boundedness of a Calderón-Zygmund operator, supposing the existence of systems of local accretive functions. We assume that the integrability exponents on these systems of functions are of the form $1/p+1/q\le 1$, and provide a direct proof. The principal point of interest is in the use of random grids and the corresponding construction of the corona. We also utilize certain twisted martingale transform inequalities.
Die Schönheit der Statistik
Creators: name: Weiß, Christel
Publisher: name: Heidelberger Jahrbücher Online
Year: 2019

description: In diesem Beitrag wird den Gründen nachgegangen, weshalb Kenntnisse in Statistik in vielerlei Hinsicht von Nutzen sind und sogar zu begeistern vermögen. Anhand eines Beispiels (Mammographie-Screening) wird dargelegt, wie ein angemessener Umgang mit Wahrscheinlichkeiten hilft, Informationen sinnvoll einzuordnen und Risiken adäquat zu interpretieren. Außerdem wird erörtert, wie mit statistischen Kenngrößen komplexe Sachverhalte in genial einfacher Weise numerisch beschrieben werden, welche Aussagen in Schätzwerten verborgen sind und wie in empirischen Studien statistische Verfahren zu neuen Erkenntnissen führen können. Schließlich wird anhand der Beispiele einiger bekannter Persönlichkeiten aufgezeigt, wie diese die Schönheit und Eleganz statistischer Verfahren empfunden haben.
description: Heidelberger Jahrbücher Online, Bd. 4 (2019): Schönheit: Die Sicht der Wissenschaft
Lagrange Anchor for Bargmann-Wigner equations
Creators: name: Kaparulin, D. S.
name: Lyakhovich, S. L.
name: Sharapov, A. A.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: A Poincare invariant Lagrange anchor is found for the non-Lagrangian relativistic wave equations of Bargmann and Wigner describing free massless fields of spin s > 1/2 in four-dimensional Minkowski space. By making use of this Lagrange anchor, we assign a symmetry to each conservation law.
description: A contribution to Proceedings of the XXXI Workshop on the Geometric Methods in Physics
Pesin Entropy Formula for C1 Diffeomorphisms with Dominated Splitting
Creators: name: Catsigeras, Eleonora
name: Cerminara, Marcelo
name: Enrich, Heber
Publisher: name: arXiv
Year: 2012
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics

description: For any C1 diffeomorphism with dominated splitting we consider a nonempty set of invariant measures which describes the asymptotic statistics of Lebesgue-almost all orbits. They are the limits of convergent subsequences of averages of the Dirac delta measures supported on those orbits. We prove that the metric entropy of each of these measures is bounded from below by the sum of the Lyapunov exponents on the dominating subbundle. As a consequence, if those exponents are non negative, and if the exponents on the dominated subbundle are non positive, those measures satisfy the Pesin Entropy Formula.
description: We added the corrections suggested by the referee. Accepted for publication in the journal "Ergodic Theory and Dynamical Systems". Final version will appear in http://journals.cambridge.org/action/displayJournal?jid=ets
title: Medizinische Begutachtung digitaler Gesundheitsanwendungen im Projekt „Trusted Health Apps“. Bewertungsprojekt: Angst- und Panikstörungen. Anwendung: Novego: Ängste überwinden
Creators: name: Thiele, Christian
Publisher: name: Bertelsmann Stiftung
publisherIdentifier: https://ror.org/01wj9hk44
publisherIdentifierScheme: ROR
Year: 2025
Subjects: Digitale Gesundheitsanwendung
Angststörung
Panikstörung

description: Unsere medizinische Bewertung digitaler Gesundheitsanwendungen (DiGA) zeigt, dass die medizinische Qualität und Unterschiede in ihrer Evidenzlage systematisch und transparent dargestellt werden können. Dies ist ein entscheidender Schritt, um Patientinnen und Patienten sowie der Ärzteschaft und anderen Stakeholdern Orientierung zu bieten.

In diesem Bericht werden die Bewertungsergebnisse der Anwendung „Novego: Ängste überwinden“ dargestellt.
Reliability measures of second order semi-Markov chain applied to wind energy production
Creators: name: D'Amico, Guglielmo
name: Petroni, Filippo
name: Prattico, Flavio
Publisher: name: arXiv
Year: 2012
Subjects: subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: Geophysics (physics.geo-ph)
subject: FOS: Physical sciences

description: In this paper we consider the problem of wind energy production by using a second order semi-Markov chain in state and duration as a model of wind speed. The model used in this paper is based on our previous work where we have showed the ability of second order semi-Markov process in reproducing statistical features of wind speed. Here we briefly present the mathematical model and describe the data and technical characteristics of a commercial wind turbine (Aircon HAWT-10kW). We show how, by using our model, it is possible to compute some of the main dependability measures such as reliability, availability and maintainability functions. We compare, by means of Monte Carlo simulations, the results of the model with real energy production obtained from data available in the Lastem station (Italy) and sampled every 10 minutes. The computation of the dependability measures is a crucial point in the planning and development of a wind farm. Through our model, we show how the values of this quantity can be obtained both analytically and computationally.
Eva Rystedt, Early Etruscan Akroteria from Acquarossa and Poggio Civitate (Murlo)
Creators: name: Danner, Peter
Publisher: name: Bonner Jahrbücher
Year: 2019

description: Rezension zu: Eva Rystedt, Early Etruscan Akroteria from Acquarossa and Poggio Civitate (Murlo). Acquarossa 4. Skrifter utgivna av Svenska Institutet i Rom XXXVIII 4, Stockholm 1983. 169 Seiten, 31 Tafeln.
description: Bonner Jahrbücher, Bd. 189.1989: Bonner Jahrbücher
Gerold Walser, Römische Inschrift-Kunst
Creators: name: Freis, Helmut
Publisher: name: Bonner Jahrbücher
Year: 2019

description: Rezension zu: Gerold Walser, Römische Inschrift-Kunst. Römische Inschriften für den akademischen Unterricht und als Einführung in die lateinische Epigraphik. Franz Steiner Verlag, Wiesbaden 1988. 296 Seiten.
description: Bonner Jahrbücher, Bd. 189.1989: Bonner Jahrbücher
Jean-Luc Fiches, Les maisons gallo-romaines d’Ambrussum (Villetelle Hérault)
Creators: name: Haalebos, Jan Kees
Publisher: name: Bonner Jahrbücher
Year: 2019

description: Rezension zu: Jean-Luc Fiches, Les maisons gallo-romaines d’Ambrussum (Villetelle Hérault). La fouille du secteur IV 1976-1980. Documents d’archéologie française 5. Editions de la Maison des Sciences de l’Homme, Paris 1986. 139 Seiten, 106 Textabbildungen.
description: Bonner Jahrbücher, Bd. 189.1989: Bonner Jahrbücher
An empirical study to order citation statistics between subject fields
Creators: name: van Zyl, J. Martin
name: van der Merwe, Sean
Publisher: name: arXiv
Year: 2012
Subjects: subject: Digital Libraries (cs.DL)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences
subject: 62P99

description: An empirical study is conducted to compare citations per publication, statistics and observed Hirsch indexes between subject fields using summary statistics of countries. No distributional assumptions are made and ratios are calculated. These ratios can be used to make approximate comparisons between researchers of different subject fields with respect to the Hirsch index.
Zur Maltechnik der karolingischen Fresken aus St. Maximin in Trier
Creators: name: Eichler, Hans
Publisher: name: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Year: 2019

description: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege, Bd. 3 Nr. 12 (1950): Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Nuclear recollisions in laser-assisted $α$ decay
Creators: name: Cortés, Héctor Mauricio Castañeda
name: Müller, Carsten
name: Keitel, Christoph H.
name: Pálffy, Adriana
Publisher: name: arXiv
Year: 2012
Subjects: subject: Nuclear Theory (nucl-th)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: Laser-induced nuclear recollisions following $α$ decay in the presence of an intense laser field are investigated theoretically. We show that while an intense optical laser does not influence notably the tunneling rate in $α$ decay, it can completely change the $α$ particle spectrum. For intensities of $10^{22}-10^{23}$ W/cm$^{2}$, the field is strong enough to induce recollisions between the emitted $α$ particle and the daughter nucleus. The energy gained by the $α$ particle in the field can reach 20 MeV and suffice to trigger several types of nuclear reactions on a femtosecond time scale. Similar conclusions can be drawn about laser-induced recollisions after proton emission. Prospects for the experimental realization of laser-induced nuclear recollisions are discussed.
description: 5 pages, 3 figures; v2 extended the motivation and discussion about experimental feasibility; results unchanged
Horowitz-Randol pairs of curves in q-differential metrics
Creators: name: Bankovic, Anja
Publisher: name: arXiv
Year: 2012
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics

description: The Euclidean cone metrics coming from q-differentials on a closed surface of genus g > 1 define an equivalence relation on homotopy classes of closed curves declaring two to be equivalent if they have the equal length in every such metric. We prove an analog of the result of Randol for hyperbolic metrics (building on the work of Horowitz): for every integer q > 1, the corresponding equivalence relation has arbitrarily large equivalence classes. In addition, we describe how these equivalence relations are related to each other.
Ausstellungskataloge und Museumsberichte
Creators: name: Redaktion, Die
Publisher: name: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Year: 2019

description: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege, Bd. 3 Nr. 7 (1950): Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Die Malereien im Chor der Lübecker Marienkirche
Creators: name: Grundmann, Günther
name: Sedlmaier, Richard
Publisher: name: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Year: 2019

description: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege, Bd. 5 Nr. 12 (1952): Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Collapse of Turbulent Cores and Reconnection Diffusion
Creators: name: Leão, M. R. M.
name: Pino, E. M. de Gouveia Dal
name: Santos-Lima, R.
name: Lazarian, A.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: For a molecular cloud clump to form stars some transport of magnetic flux is required from the denser, inner regions to the outer regions of the cloud, otherwise this can prevent the collapse. Fast magnetic reconnection which takes place in the presence of turbulence can induce a process of reconnection diffusion (RD). Extending earlier numerical studies of reconnection diffusion in cylindrical clouds, we consider more realistic clouds with spherical gravitational potentials and also account for the effects of the gas self-gravity. We demonstrate that within our setup RD is efficient. We have also identified the conditions under which RD becomes strong enough to make an initially subcritical cloud clump supercritical and induce its collapse. Our results indicate that the formation of a supercritical core is regulated by a complex interplay between gravity, self-gravity, the magnetic field strength and nearly transonic and trans-Alfvénic turbulence, confirming that RD is able to remove magnetic flux from collapsing clumps, but only a few of them become nearly critical or supercritical, sub-Alfvénic cores, which is consistent with the observations. Besides, we have found that the supercritical cores built up in our simulations develop a predominantly helical magnetic field geometry which is also consistent with observations. Finally, we have evaluated the effective values of the turbulent reconnection diffusion coefficient and found that they are much larger than the numerical diffusion, especially for initially trans-Alfvénic clouds, ensuring that the detected magnetic flux removal is due to to the action of the RD rather than to numerical diffusivity.
description: 24 pages, 18 figures, accepted for publication in the ApJ
Tafeln
Creators: name: Redaktion, Die
Publisher: name: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Year: 2019

description: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege, Bd. 14 Nr. 3 (1961): Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Brea, L. Bernabo: Alt-Sizilien, kulturelle Entwicklung vor der griechischen Kolonisation
Creators: name: Jacob-Friesen, Karl Hermann
Publisher: name: Nachrichten aus Niedersachsens Urgeschichte
Year: 2019

description: Rezension zu: Brea, L. Bernabo: Alt-Sizilien, kulturelle Entwicklung vor der griechischen Kolonisation. Aus dem Englischen übersetzt. Köln (M. Du Mont-Schauberg) 1958. 278 Seiten mit 50 Abb. im Text und 78 Bildtafeln. Leinen
description: Nachrichten aus Niedersachsens Urgeschichte, Bd. 28 (1959): Nachrichten aus Niedersachsens Urgeschichte
Representations of Infinitesimal Cherednik Algebras
Creators: name: Ding, Fengning
name: Tsymbaliuk, Alexander
Publisher: name: arXiv
Year: 2012
Subjects: subject: Representation Theory (math.RT)
subject: FOS: Mathematics

description: Infinitesimal Cherednik algebras, first introduced in [EGG], are continuous analogues of rational Cherednik algebras, and in the case of gl_n, are deformations of universal enveloping algebras of the Lie algebras sl_{n+1}. Despite these connections, infinitesimal Cherednik algebras are not widely-studied, and basic questions of intrinsic algebraic and representation theoretical nature remain open. In the first half of this paper, we construct the complete center of H_ζ(gl_n) for the case of n=2 and give one particular generator of the center, the Casimir operator, for general n. We find the action of this Casimir operator on the highest weight modules to prove the formula for the Shapovalov determinant, providing a criterion for the irreducibility of Verma modules. We classify all irreducible finite dimensional representations and compute their characters. In the second half, we investigate Poisson-analogues of the infinitesimal Cherednik algebras and use them to gain insight on the center of H_ζ(gl_n). Finally, we investigate H_ζ(sp_{2n}) and extend various results from the theory of H_ζ(gl_n), such as a generalization of Kostant's theorem.
description: 21 pages, 2 figures. Changes:
1) to appear in J. Of Represent. Theory 2) multiple typos fixed 3) detailed Appendix with explicit calculations for the case of n=2 deleted
Christiansson, Hans: Sydskandinavisk Stil
Creators: name: Jacob-Friesen, Karl Hermann
Publisher: name: Nachrichten aus Niedersachsens Urgeschichte
Year: 2019

description: Rezension zu: Christiansson, Hans: Sydskandinavisk Stil. Studier i Ornamentiken pa de senvikingatida runstenärna. Uppsala (Almqvist u. Wikseil) 1959. 282 Seiten, 2 Karten und 190 Abbildungen auf Tafeln. Englische Zusammenfassung. Geh.
description: Nachrichten aus Niedersachsens Urgeschichte, Bd. 28 (1959): Nachrichten aus Niedersachsens Urgeschichte
Fischer, Franz: Der spätlatenezeitliche Depot-Fund von Kappel, Kr. Saulgau
Creators: name: Jacob-Friesen, Karl Hermann
Publisher: name: Nachrichten aus Niedersachsens Urgeschichte
Year: 2019

description: Rezension zu: Fischer, Franz: Der spätlatenezeitliche Depot-Fund von Kappel, Kr. Saulgau. Stuttgart (Verlag Silberburg) 1959. 39 Seiten mit 6 Textabb. und 29 Taf. Kart.
description: Nachrichten aus Niedersachsens Urgeschichte, Bd. 28 (1959): Nachrichten aus Niedersachsens Urgeschichte
Bounces with O(3) x O(2) symmetry
Creators: name: Masoumi, Ali
name: Weinberg, Erick J.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We study the contribution to the decay of de Sitter vacua from bounces with O(3) x O(2) symmetry. These correspond to the thermal production of a vacuum bubble at the center of a horizon volume with radius r_H and a temperature defined by the horizon. They are analogues of the flat spacetime bounces, independent of Euclidean time, that correspond to thermal production of a critical bubble. If either the strength of gravity or the false vacuum energy are increased, with all other parameters held fixed, the bounces approach, and eventually merge with, the Hawking-Moss solution. Increasing the height of the barrier separating the true and false vacuum, and thus the tension in the bubble wall, causes the center of the bubble wall to approach, but never reach, the horizon. This is in contrast with the prediction of the thin-wall approximation, which inevitably breaks down when the wall is near the horizon. Our numerical results show that the Euclidean action of our solutions is always greater than that of the corresponding O(4)-symmetric Coleman-De Luccia bounce.
description: 22 pages, 8 figures; minor corrections to Eqs. (2.2), (4.8), and (4.9); results and conclusions unchanged
Involutive A-infinity algebras and dihedral cohomology
Creators: name: Braun, Christopher
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Algebra (math.QA)
subject: K-Theory and Homology (math.KT)
subject: FOS: Mathematics

description: We define and study the cohomology theories associated to A-infinity algebras and cyclic A-infinity algebras equipped with an involution, generalising dihedral cohomology to the A-infinity context. Such algebras arise, for example, as unoriented versions of topological conformal field theories. It is well known that Hochschild cohomology and cyclic cohomology govern, in a precise sense, the deformation theory of A-infinity algebras and cyclic A-infinity algebras and we give analogous results for the deformation theory in the presence of an involution. We also briefly discuss generalisations of these constructions and results to homotopy algebras over Koszul operads, such as L-infinity algebras or C-infinity algebras equipped with an involution.
description: 22 pages, some minor typos corrected
Rust, Alfred: Die jungpaläolithischen Zeltanlagen von Ahrensburg
Creators: name: Jacob-Friesen, Karl Hermann
Publisher: name: Nachrichten aus Niedersachsens Urgeschichte
Year: 2019

description: Rezension zu: Rust, Alfred: Die jungpaläolithischen Zeltanlagen von Ahrensburg. Mit Beiträgen von R. Schütrumpf, W. Herre und H. Requate. Offa-Bücher, Band 15. Neumünster (Karl Wachholtz) 1958. 146 S., 56 Textabb. und 72 Taf. Brosch.
description: Nachrichten aus Niedersachsens Urgeschichte, Bd. 28 (1959): Nachrichten aus Niedersachsens Urgeschichte
Twistor-strings and gravity tree amplitudes
Creators: name: Adamo, Tim
name: Mason, Lionel
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Recently we discussed how Einstein supergravity tree amplitudes might be obtained from the original Witten and Berkovits twistor-string theory when external conformal gravitons are restricted to be Einstein gravitons. Here we obtain a more systematic understanding of the relationship between conformal and Einstein gravity amplitudes in that twistor-string theory. We show that although it does not in general yield Einstein amplitudes, we can nevertheless obtain some partial twistor-string interpretation of the remarkable formulae recently been found by Hodges and generalized to all tree amplitudes by Cachazo and Skinner. The Hodges matrix and its higher degree generalizations encode the world sheet correlators of the twistor string. These matrices control both Einstein amplitudes and those of the conformal gravity arising from the Witten and Berkovits twistor-string. Amplitudes in the latter case arise from products of the diagonal elements of the generalized Hodges matrices and reduced determinants give the former. The reduced determinants arise if the contractions in the worldsheet correlator are restricted to form connected trees at MHV. The (generalized) Hodges matrices arise as weighted Laplacian matrices for the graph of possible contractions in the correlators and the reduced determinants of these weighted Laplacian matrices give the sum of of the connected tree contributions by an extension of the Matrix-Tree theorem.
description: 32 pages, 3 figures. v2: many improvements to arguments and discussion; v3: improvements, expansions, and corrections to interpretation and discussion
Bericht der Abteilung für ur- und frühgeschichtliche Bodendenkmalpflege am Niedersächsischen Landesmuseum Hannover
Creators: name: Claus, Martin
Publisher: name: Nachrichten aus Niedersachsens Urgeschichte
Year: 2019

description: Nachrichten aus Niedersachsens Urgeschichte, Bd. 30 (1961): Nachrichten aus Niedersachsens Urgeschichte
Steinzeitlicher Grabhügel bei Gehrden, Krs. Hannover-Land
Creators: name: Nowothnig, Walter
Publisher: name: Nachrichten aus Niedersachsens Urgeschichte
Year: 2019

description: Nachrichten aus Niedersachsens Urgeschichte, Bd. 30 (1961): Nachrichten aus Niedersachsens Urgeschichte
Eine böhmische Scheibenkopfnadel aus Vesbeck, Krs. Neustadt a. Rbge.
Creators: name: Claus, Martin
Publisher: name: Nachrichten aus Niedersachsens Urgeschichte
Year: 2019

description: Nachrichten aus Niedersachsens Urgeschichte, Bd. 30 (1961): Nachrichten aus Niedersachsens Urgeschichte
Ästhetische Ökonomie in der Gestalt der Pflanzen
Creators: name: Erbar, Claudia
name: Leins, Peter
Publisher: name: Heidelberger Jahrbücher Online
Year: 2019

description: Sowohl in ihrer Entstehung als auch ihrer Funktionalität im fertigen Zustand streben Pflanzenstrukturen eine Optimierung an. Es ist die natürliche Selektion, die quasi vom Ökonomischen Prinzip bzw. Optimierungsprinzip beherrscht wird, vor dessen Hintergrund „erbarmungslose“ Konkurrenz abläuft (Evolution ist Massensterben). Häufig sind „Fibonacci-Zahlen“ bis hin zum Goldenen Schnitt im Spiel. Letztere, aber auch beispielsweise Verpackungstechniken (Verpacken empfindlicher Pflanzengewebe, zuweilen ohne Verpackungsmaterialien) oder Locksignale zum Zwecke der Blumenbestäubung können ästhetische „Empfindungen“ hervorrufen. Ist möglicherweise das „schöpferische“ Optimierungsprinzip mit dem ästhetischen „Empfinden“ des Homo sapiens, bewusst oder unbewusst, gekoppelt? Sind Denken und Handeln des Menschen nicht schon seit alters her vom Ökonomischen Prinzip gelenkt? Gibt es allgemein eine ökonomische Ästhetik?
description: Heidelberger Jahrbücher Online, Bd. 4 (2019): Schönheit: Die Sicht der Wissenschaft
Counting fine gradings on matrix algebras and on classical simple Lie algebras
Creators: name: Kochetov, Mikhail
name: Parsons, Nicholas
name: Sadov, Sergey
Publisher: name: arXiv
Year: 2012
Subjects: subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics
subject: 17B70, 16W50 (Primary) 65A05 (Secondary)

description: Known classification results allow us to find the number of (equivalence classes of) fine gradings on matrix algebras and on classical simple Lie algebras over an algebraically closed field $\mathbb{F}$ (assuming $\mathrm{char} \mathbb{F}\ne 2$ in the Lie case). The computation is easy for matrix algebras and especially for simple Lie algebras of type $B_r$ (the answer is just $r+1$), but involves counting orbits of certain finite groups in the case of Series $A$, $C$ and $D$. For $X\in\{A,C,D\}$, we determine the exact number of fine gradings, $N_X(r)$, on the simple Lie algebras of type $X_r$ with $r\le 100$ as well as the asymptotic behaviour of the average, $\hat N_X(r)$, for large $r$. In particular, we prove that there exist positive constants $b$ and $c$ such that $\exp(br^{2/3})\le\hat N_X(r)\le\exp(cr^{2/3})$. The analogous average for matrix algebras $M_n(\mathbb{F})$ is proved to be $a\ln n+O(1)$ where $a$ is an explicit constant depending on $\mathrm{char} \mathbb{F}$.
description: 24 pages with 8 tables
Schlauchsilierung von Hanf
Creators: name: Idler, Christine
name: Pecenka, Ralf
name: Grundmann, Phillip
name: Gusovius, Hans-Jörg
Publisher: name: LANDTECHNIK
Year: 2006

description: Die konventionelle Verarbeitung von Naturfasern basiert auf der Feldtrocknung und der damit verbundenen Röste des Faserstrohs. Zum traditionellen Erntezeitpunkt im September sind die Witterungsbedingungen in Deutschland für die Hanfernte ungünstig. Abnehmende Trockenheit und zunehmende Temperaturschwankungen erschweren das Abtrocknen des Hanfstrohs. Am ATB wurde ein neues Verfahren zur Hanfverwertung konzipiert, mit dem das Witterungsrisiko reduziert und die gesamte Pflanzenmasse verwertet werden kann. Es werden erste Ergebnisse zur Bereitstellung des Hanfkonservats durch Schlauchsilierung vorgestellt.
description: LANDTECHNIK, Bd. 61 Nr. 5 (2006)
Foldable Triangulations of Lattice Polygons
Creators: name: Joswig, Michael
name: Ziegler, Günter M.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Metric Geometry (math.MG)
subject: FOS: Mathematics
subject: 52B20

description: We give a simple formula for the signature of a foldable triangulation of a lattice polygon in terms of its boundary. This yields lower bounds on the number of real roots of certain of systems of polynomial equations known as "Wronski systems".
description: 6 pages, 3 figures
Adiabatic rapid passage in quantum dots: phonon-assisted decoherence and biexciton generation
Creators: name: Gawarecki, K.
name: Lüker, S.
name: Reiter, D. E.
name: Kuhn, T.
name: Glässl, M.
name: Axt, V. M.
name: Grodecka-Grad, A.
name: Machnikowski, P.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We study the evolution of a quantum dot controlled by a frequency-swept (chirped), linearly polarized laser pulse in the presence of carrier-phonon coupling. The final occupation of the exciton state is limited both due to phonon-induced transitions between the adiabatic spectral branches and because of phonon-assisted transitions to the biexciton state. When the biexciton shift is large enough, the quantum dot can be modeled as a two-level system, which corresponds to excitation with circularly polarized light. For this case, we compare different methods of simulations: (i) a time convolutionless method, (ii) correlation expansion and (iii) path integrals. We show that results obtained from these methods agree perfectly at low temperatures.
description: arXiv admin note: substantial text overlap with arXiv:1209.2675
Ginette Aumassip, Le Bas-Sahara dans la Préhistoire
Creators: name: Hahn, Joachim
Publisher: name: Bonner Jahrbücher
Year: 2019

description: Rezension zu: Ginette Aumassip, Le Bas-Sahara dans la Préhistoire. Etudes d’Antiquités Africaines. Centre National de la Recherche Scientifique, Paris 1986. 612 Seiten, 182 Abbildungen, 3 Beilagen, 154 Tabellen.
description: Bonner Jahrbücher, Bd. 189.1989: Bonner Jahrbücher
Novel States of Classical Light and Noncontextuality
Creators: name: Ghose, Partha
name: Mukherjee, Anirban
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: A new criterion, based on noncontextuality, is derived to discriminate between separable and nonseparable states in classical wave optics where no discreteness is involved. An experiment is proposed to test the violation of noncontextuality by a nonseparable state. Such states have only recently begun to be explored. The significance of their nonseparability or entanglement as well as their similarities with and differences from entangled quantum states are discussed.
description: 15 pages, 1 figure; substantial modifications made without changing the basic claims and content; to be published in Advanced Science, Engineering and Medicine (ASEM); the figure replaced, no other change
Quantum local asymptotic normality based on a new quantum likelihood ratio
Creators: name: Yamagata, Koichi
name: Fujiwara, Akio
name: Gill, Richard D.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: Statistics Theory (math.ST)
subject: Applications (stat.AP)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: FOS: Computer and information sciences

description: We develop a theory of local asymptotic normality in the quantum domain based on a novel quantum analogue of the log-likelihood ratio. This formulation is applicable to any quantum statistical model satisfying a mild smoothness condition. As an application, we prove the asymptotic achievability of the Holevo bound for the local shift parameter.
description: Published in at http://dx.doi.org/10.1214/13-AOS1147 the Annals of Statistics (http://www.imstat.org/aos/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Carrier-density-controlled anisotropic spin susceptibility of two-dimensional hole systems
Creators: name: Kernreiter, T.
name: Governale, M.
name: Zuelicke, U.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We have studied quantum-well-confined holes based on the Luttinger-model description for the valence band of typical semiconductor materials. Even when only the lowest quasi-two-dimensional (quasi-2D) subband is populated, the static spin susceptibility turns out to be very different from the universal isotropic Lindhard-function lineshape obtained for 2D conduction-electron systems. The strongly anisotropic and peculiarly density-dependent spin-related response of 2D holes at long wavelengths should make it possible to switch between easy-axis and easy-plane magnetization in dilute magnetic quantum wells. An effective g factor for 2D hole systems is proposed.
description: 5+1 pages, 4+1 figures, RevTex 4.1, article + suppl. material to appear in Phys. Rev. Letters
Michael Brandt, Materialvorlage und statistische Untersuchungen zur Bandkeramik in Unterfranken
Creators: name: Gallay, Gretel
Publisher: name: Bonner Jahrbücher
Year: 2019

description: Rezension zu: Michael Brandt, Materialvorlage und statistische Untersuchungen zur Bandkeramik in Unterfranken. Materialhefte zur Bayerischen Vorgeschichte Reihe A, Band 54. Verlag Michael Lassleben, Kallmünz 1985. 159 Seiten, 124 Abbildungen, 72 Tafeln.
description: Bonner Jahrbücher, Bd. 189.1989: Bonner Jahrbücher
On Euler's equation and `EPDiff'
Creators: name: Mumford, David
name: Michor, Peter W.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Analysis of PDEs (math.AP)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 35Q31, 58B20, 58D05

description: We study a family of approximations to Euler's equation depending on two parameters $\varepsilon,η\ge 0$. When $\varepsilon=η=0$ we have Euler's equation and when both are positive we have instances of the class of integro-differential equations called EPDiff in imaging science. These are all geodesic equations on either the full diffeomorphism group $\operatorname{Diff}_{H^\infty}(\mathbb R^n)$ or, if $\varepsilon = 0$, its volume preserving subgroup. They are defined by the right invariant metric induced by the norm on vector fields given by $$ \|v\|_{\varepsilon,η} = \int_{\mathbb R^n} dx $$ where $L_{\varepsilon,η} = (I-\tfrac{η^2}{p} \triangle)^p \circ (I-\tfrac1{\varepsilon^2} \nabla \circ ÷)$. All geodesic equations are locally well-posed, and the $L_{\varepsilon,η}$-equation admits solutions for all time if $η>0$ and $p\ge (n+3)/2$. We tie together solutions of all these equations by estimates which, however, are only local in time. This approach leads to a new notion of momentum which is transported by the flow and serves as a generalization of vorticity. We also discuss how delta distribution momenta lead to "vortex-solitons", also called "landmarks" in imaging science, and to new numeric approximations to fluids.
description: 28 pages, 5 figures; version adapted to the published version, typos corrected
A photonic crystal realization of a phase driven two-level atom
Creators: name: Rodríguez-Lara, B. M.
name: Cárdenas, Alejandro Zárate
name: Soto-Eguibar, Francisco
name: Moya-Cessa, Héctor Manuel
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We propose a set of photonic crystals that realize a nonlinear quantum Rabi model equivalent to a two-level system driven by the phase of a quantized electromagnetic field. The crystals are exactly soluble in the weak-coupling regime and their dispersion relation is discrete. The system is diagonalized by normal modes equivalent to a dressed state basis. In the strong-coupling regime, we use perturbation theory and find that the dispersion relation is continuous and give the normal modes of the crystal in terms of continued fractions. We show that these photonic crystals allow state reconstruction in the form of coherent oscillations in the weak-coupling regime.
description: 15 pages, 4 figures
Bounded Geometry and Characterization of post-singularly Finite $(p,q)$-Exponential Maps
Creators: name: Chen, Tao
name: Jiang, Yunping
name: Keen, Linda
Publisher: name: arXiv
Year: 2012
Subjects: subject: Dynamical Systems (math.DS)
subject: Complex Variables (math.CV)
subject: FOS: Mathematics
subject: 37F30, 37F20, 37F10, 30F30, 30D20, 30F60

description: In this paper we define a topological class of branched covering maps of the plane called {\em topological exponential maps of type $(p,q)$} and denoted by $\TE_{p,q}$, where $p\geq 0$ and $q\geq 1$. We follow the framework given in \cite{Ji} to study the problem of combinatorially characterizing an entire map $P e^{Q}$, where $P$ is a polynomial of degree $p$ and $Q$ is a polynomial of degree $q$ using an {\em iteration scheme defined by Thurston} and a {\em bounded geometry condition}. We first show that an element $f \in {\TE}_{p,q}$ with finite post-singular set is combinatorially equivalent to an entire map $P e^{Q}$ if and only if it has bounded geometry with compactness. Thus to complete the characterization, we only need to check that the bounded geometry actually implies compactness. We show this for some $f\in \TE_{p,1}$, $p\geq 1$. Our main result in this paper is that a post-singularly finite map $f$ in $\TE_{0,1}$ or a post-singularly finite map $f$ in $\TE_{p,1}$, $p\geq 1$, with only one non-zero simple breanch point $c$ such that either $c$ is periodic or $c$ and $f(c)$ are both not periodic, is combinatorially equivalent to a post-singularly finite entire map of either the form $e^{λz}$ or the form $ αz^{p}e^{λz}$, where $α=(-λ/p)^{p}e^{- λ(-p/λ)^{p}}$, respectively, if and only if it has bounded geometry. This is the first result in this direction for a family of transcendental holomorphic maps with critical points.
description: arXiv admin note: text overlap with arXiv:1112.2557
Search for a non-standard-model Higgs boson decaying to a pair of new light bosons in four-muon final states
Creators: name: CMS Collaboration
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Results are reported from a search for non-standard-model Higgs boson decays to pairs of new light bosons, each of which decays into the oppositely charged dimuon final state. The new bosons may be produced either promptly or via a decay chain. The data set corresponds to an integrated luminosity of 5.3 inverse femtobarns of proton-proton collisions at sqrt(s) = 7 TeV, recorded by the CMS experiment at the LHC in 2011. Such Higgs boson decays are predicted in several scenarios of new physics, including supersymmetric models with extended Higgs sectors or hidden valleys. Thus, the results of the search are relevant for establishing whether the new particle observed in Higgs boson searches at the LHC has the properties expected for a standard model Higgs boson. No excess of events is observed with respect to the yields expected from standard model processes. A model-independent upper limit of 0.86 +/- 0.06 fb on the product of the cross section times branching fraction times acceptance is obtained. The results, which are applicable to a broad spectrum of models, are compared with the predictions of two benchmark scenarios as functions of a Higgs boson mass larger than 86 GeV and of a new light boson mass within the range 0.25-3.55 GeV.
description: Replaced with published version. Added journal reference and DOI
Bernard Andreae und Baldassare Conticello, Skylla und Charybdis: Zur Skylla- Gruppe von Sperlonga
Creators: name: Linfert, Andreas
Publisher: name: Bonner Jahrbücher
Year: 2019

description: Rezension zu: Bernard Andreae und Baldassare Conticello, Skylla und Charybdis: Zur Skylla- Gruppe von Sperlonga. Akademie der Wissenschaften und der Literatur Mainz, Abhandlungen der Geistes- und Sozialwissenschaftlichen Klasse Nr. 14. Franz Steiner Verlag, Wiesbaden 1987. 76 Seiten, 71 Abbildungen auf 32 Tafeln.
description: Bonner Jahrbücher, Bd. 189.1989: Bonner Jahrbücher
Alan K. Bowman, Egypt after the Pharaohs: 332 BC — AD 642
Creators: name: Heinen, Heinz
Publisher: name: Bonner Jahrbücher
Year: 2019

description: Rezension zu: Alan K. Bowman, Egypt after the Pharaohs: 332 BC — AD 642. From Alexander to the Arab Conquest. British Museum Publications Limited, London 1986. 264 Seiten, 144 teils farbige Abbildungen.
description: Bonner Jahrbücher, Bd. 189.1989: Bonner Jahrbücher
On the Renormalization of Non-Commutative Field Theories
Creators: name: Blaschke, Daniel N.
name: Garschall, Thomas
name: Gieres, Francois
name: Heindl, Franz
name: Schweda, Manfred
name: Wohlgenannt, Michael
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: This paper addresses three topics concerning the quantization of non-commutative field theories (as defined in terms of the Moyal star product involving a constant tensor describing the non-commutativity of coordinates in Euclidean space). To start with, we discuss the Quantum Action Principle and provide evidence for its validity for non-commutative quantum field theories by showing that the equation of motion considered as insertion in the generating functional Zc[j] of connected Green functions makes sense. Second, we consider the generalization of the BPHZ renormalization scheme to non-commutative field theories and apply it to the case of a self-interacting real scalar field. Finally, we discuss the renormalizability of various models for a self-interacting complex scalar field by using the approach of algebraic renormalization.
description: 29 pages; v2 minor corrections and references added, to appear in EPJC
Die Germanen. Geschichte und Kultur der germanischen Stämme in Mitteleuropa 1
Creators: name: Capelle, Torsten
Publisher: name: Bonner Jahrbücher
Year: 2019

description: Rezension zu: Die Germanen. Geschichte und Kultur der germanischen Stämme in Mitteleuropa 1. Von den Anfängen bis zum 2. Jahrhundert unserer Zeitrechnung. Ausgearbeitet von einem Autorenkollektiv unter Leitung von Bruno Krüger. Veröffentlichungen des Zentralinstitutes für Alte Geschichte und Archäologie der Akademie der Wissenschaften der DDR 4/1. 5. durchgesehene Auflage. Akademie-Verlag, Berlin 1988. 584 Seiten, 133 Abbildungen, 63 Tafeln, 3 Karten.
description: Bonner Jahrbücher, Bd. 189.1989: Bonner Jahrbücher
Corrector Analysis of a Heterogeneous Multi-scale Scheme for Elliptic Equations with Random Potential
Creators: name: Bal, Guillaume
name: Jing, Wenjia
Publisher: name: arXiv
Year: 2012
Subjects: subject: Numerical Analysis (math.NA)
subject: Analysis of PDEs (math.AP)
subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 35R60, 65N30, 65C99

description: This paper analyzes the random fluctuations obtained by a heterogeneous multi-scale first-order finite element method applied to solve elliptic equations with a random potential. We show that the random fluctuations of such solutions are correctly estimated by the heterogeneous multi-scale algorithm when appropriate fine-scale problems are solved on subsets that cover the whole computational domain. However, when the fine-scale problems are solved over patches that do not cover the entire domain, the random fluctuations may or may not be estimated accurately. In the case of random potentials with short-range interactions, the variance of the random fluctuations is amplified as the inverse of the fraction of the medium covered by the patches. In the case of random potentials with long-range interactions, however, such an amplification does not occur and random fluctuations are correctly captured independent of the (macroscopic) size of the patches. These results are consistent with those obtained by the authors for more general equations in the one-dimensional setting and provide indications on the loss in accuracy that results from using coarser, and hence less computationally intensive, algorithms.