cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Scaling up the extrinsic curvature in asymptotically flat gravitational initial data: Generating trapped surfaces
Creators: name: Bai, Shan
name: Murchadha, Niall Ó
Publisher: name: arXiv
Year: 2012
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The existence of the initial value constraints means that specifying initial data for the Einstein equations is non-trivial. The standard method of constructing initial data in the asymptotically flat case is to choose an asymptotically flat 3-metric and a transverse-tracefree (TT) tensor on it. One can find a conformal transformation that maps these data into solutions of the constraints. In particular, the TT tensor becomes the extrinsic curvature of the 3-slice. We wish to understand how the physical solution changes as the free data is changed. In this paper we investigate an especially simple change: we multiply the TT tensor by a large constant. One might assume that this corresponds to pumping up the extrinsic curvature in the physical initial data. Unexpectedly, we show that, while the conformal factor monotonically increases, the physical extrinsic curvature decreases. The increase in the conformal factor however means that the physical volume increases in such a way that the ADM mass become unboundedly large. In turn, the blow-up of the mass combined with the control we have on the extrinsic curvature allows us to show that trapped surfaces, i.e., surfaces that are simultaneously future and past trapped, appear in the physical initial data.
description: 10 pages, accepted for publication in CQG
Untersuchungen zur Funktion und Auslegung von Rechteckdichtringen für Drehdurchführungen
Creators: name: Gronitzki, Mirco
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2006
Subjects: subject: Dynamische Dichtungen
subject: Drehdurchführung
subject: Rechteckdichtungen
subject: Hochtemperaturkunststoffe
subject: Finite Elemente Berechnung
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau

description: [no abstract]
Bouncing Behavior of Microscopic Dust Aggregates
Creators: name: Seizinger, Alexander
name: Kley, Wilhelm
Publisher: name: arXiv
Year: 2013
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Context: Bouncing collisions of dust aggregates within the protoplanetary may have a significant impact on the growth process of planetesimals. Yet, the conditions that result in bouncing are not very well understood. Existing simulations studying the bouncing behavior used aggregates with an artificial, very regular internal structure. Aims: Here, we study the bouncing behavior of sub-mm dust aggregates that are constructed applying different sample preparation methods. We analyze how the internal structure of the aggregate alters the collisional outcome and determine the influence of aggregate size, porosity, collision velocity, and impact parameter. Methods: We use molecular dynamics simulations where the individual aggregates are treated as spheres that are made up of several hundred thousand individual monomers. The simulations are run on GPUs. Results: Statistical bulk properties and thus bouncing behavior of sub-mm dust aggregates depend heavily on the preparation method. In particular, there is no unique relation between the average volume filling factor and the coordination number of the aggregate. Realistic aggregates bounce only if their volume filling factor exceeds 0.5 and collision velocities are below 0.1 m/s. Conclusions: For dust particles in the protoplanetary nebula we suggest that the bouncing barrier may not be such a strong handicap in the growth phase of dust agglomerates, at least in the size range of 0.1 mm.
description: 10 pages, 12 figures, accepted for publication in A&A
Enhancement of H -> gamma gamma in SU(5) model with 45_H plet
Creators: name: Khalil, S.
name: Salem, S.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We show that the low energy effective model derived from SU(5) with 45-plet Higgs can account for the recently reported enhanced diphoton decay rate of the Standard Model (SM)-like Higgs with mass about 125 GeV. This model extends the SM by an extra Higgs doublet and color-octet scalar doublet. We show that the charged octet scalars are not severely constrained by flavor changing neutral current and can be light. However, the K^0-\bar{K}^0 mixing implies that the neutral octet-scalar mass should be larger than 400 GeV for \tanβ~ O(1). The role of charged octet scalar in the loop of Higgs decay into diphoton is investigated . We point out that the most significant impact of this model on the diphoton decay width comes from the suppression of top-quark coupling with SM-like Higgs or even flipping its sign that leads to important enhancement in Γ(h -> gamma gamma). We also study the implications of the neutral octet-scalar contributions to the gluon fusion Higgs production cross section in alleviating the apparent tension between enhancement of diphoton decay rate and suppression of σ(gg -> h).
description: 21 pages, 11 Figures
On the omnipresent background gamma radiation of the continuous spectrum
Creators: name: Banjanac, R.
name: Maletić, D.
name: Joković, D.
name: Veselinović, N.
name: Dragić, A.
name: Udovičić, V.
name: Aničin, I.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: The background spectrum of a germanium detector, shielded from the radiations arriving from the lower and open for the radiations arriving from the upper hemisphere is studied, both in a ground level and in an underground laboratory. It is established that the continuous portion of this background spectrum is mostly due to the radiations that arrive from the upper hemisphere of the continuous spectrum similar to the instrumental one. The intensity of this radiation of an average energy of about 120 keV is estimated to about 8000 photons/m2s 2πsrad in a ground level laboratory, and to about 5000 photons/m2s 2πsrad at the depth of 25 m.w.e. Rough estimates of the dose that it contributes to the skin are about 1.5 nSv/h and 1 nSv/h respectively. Simulations by GEANT4 and CORSIKA demonstrate that this radiation is both of cosmic and terrestrial origin, mixed in proportion that still has to be determined.
description: 6 pages, 5 figures
title: Mythologiae septentrionalis monumenta latina editit varietate lectionis et annotatione instruxit Joannes de Wal. 1847
Creators: name: Becker, J.
Publisher: name: University Library Heidelberg
Year: 2016

description: Rezension zu: Mythologiae septentrionalis monumenta latina editit varietate lectionis et annotatione instruxit Joannes de Wal. J. Rom. et hod. Dr. Volumen prius monumenta continens epigraphica. Traiecti ad Rhenum apud Kemink et Filium MDCCCXLVII. XI. e. 289 S. 8.
SkyDe: a Skype-based Steganographic Method
Creators: name: Mazurczyk, Wojciech
name: Karas, Maciej
name: Szczypiorski, Krzysztof
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cryptography and Security (cs.CR)
subject: Multimedia (cs.MM)
subject: FOS: Computer and information sciences

description: This paper introduces SkyDe (Skype Hide), a new steganographic method that utilizes Skype encrypted packets with silence to provide the means for clandestine communication. It is possible to reuse packets that do not carry voice signals for steganographic purposes because Skype does not use any silence suppression mechanism. The method's proof-of-concept implementation and first experimental results are presented. They prove that the method is feasible and offers steganographic bandwidth as high as 2.8 kbps.
description: 7 pages, 6 figures, 1 table. The paper is submitted to 1st ACM Information Hiding and Multimedia Security Workshop (IH and ACM MMSec conferences merged into a single event), June 17-19, 2013, Montpellier, France
Soziale Milieus der gesellschaftlichen "Mitte" : eine typologisch-sozialhistorische und multivariat-sozialstatistische Makroanalyse des Leistungsorientierten Arbeitnehmermilieus und des Kleinbürgerlichen Arbeitnehmermilieus
Creators: name: Gardemin, Daniel
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2006
Subjects: subject: Soziales Milieu
subject: Mittelklasse/Mittelschicht
subject: multivariate Sozialstrukturanalyse
subject: Dewey Decimal Classification::300 | Sozialwissenschaften, Soziologie, Anthropologie

description: [no abstract]
BCS pairing in a trapped dipolar Fermi gas
Creators: name: Baranov, M.A.
name: Dobrek, L.
name: Lewenstein, M.
Publisher: name: Bristol : IOP Publishing Ltd.
Year: 2004
Subjects: subject: bose-einstein condensation
subject: ultralow temperatures
subject: molecules
subject: superfluidity
subject: physics
subject: atoms
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: We present a detailed study of the BCS pairing transition in a trapped polarized dipolar Fermi gas. In the case of a shallow nearly spherical trap, we find a decrease in the transition temperature as a function of the trap aspect ratio and predict the existence of the optimal trap geometry. The latter corresponds to the highest critical temperature of the BCS transition for a given number of particles. We also derive the phase diagram for an ultracold trapped dipolar Fermi gas in the situation where the trap frequencies can be of the order of the critical temperature of the BCS transition in the homogeneous case, and determine the critical value of the dipole - dipole interaction energy below which the BCS transition ceases to exist. The critical dipole strength is obtained as a function of the trap aspect ratio. Alternatively, for a given dipole strength, there is a critical value of the trap anisotropy for the BCS state to appear. The order parameter calculated at criticality exhibits novel non-monotonic behaviour resulting from the combined effect of the confining potential and the anisotropic character of the interparticle dipole - dipole interaction.
Supporting Open Infrastructure: A movement towards sustainable open tooling
Creators: name: Thaney, Kaitlin
Publisher: name: Zenodo
Year: 2020
Subjects: open infrastructure
scholarly communication
financial sustainability
open science

description: Slides from 2020-11-02 presentation to GEANT's RDM-Services workshop by Kaitlin Thaney of Invest in Open Infrastructure.
description: Information about how our work is funded can be found on our website: https://investinopen.org/about/how-were-funded/
Anomalous superfluid density in quantum critical superconductors
Creators: name: Hashimoto, K.
name: Mizukami, Y.
name: Katsumata, R.
name: Shishido, H.
name: Yamashita, M.
name: Ikeda, H.
name: Matsuda, Y.
name: Schlueter, J. A.
name: Fletcher, J. D.
name: Carrington, A.
name: Gnida, D.
name: Kaczorowski, D.
name: Shibauchi, T.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: When a second-order magnetic phase transition is tuned to zero temperature by a non-thermal parameter, quantum fluctuations are critically enhanced, often leading to the emergence of unconventional superconductivity. In these `quantum critical' superconductors it has been widely reported that the normal-state properties above the superconducting transition temperature $T_c$ often exhibit anomalous non-Fermi liquid behaviors and enhanced electron correlations. However, the effect of these strong critical fluctuations on the superconducting condensate below $T_c$ is less well established. Here we report measurements of the magnetic penetration depth in heavy-fermion, iron-pnictide, and organic superconductors located close to antiferromagnetic quantum critical points showing that the superfluid density in these nodal superconductors universally exhibit, unlike the expected $T$-linear dependence, an anomalous 3/2 power-law temperature dependence over a wide temperature range. We propose that this non-integer power-law can be explained if a strong renormalization of effective Fermi velocity due to quantum fluctuations occurs only for momenta $\bm{k}$ close to the nodes in the superconducting energy gap $Δ(\bm{k})$. We suggest that such `nodal criticality' may have an impact on low-energy properties of quantum critical superconductors.
description: Main text (5 pages, 3 figures) + Supporting Information (3 pages, 4 figures). Published in PNAS Early Edition on February 12, 2013
Water Supply and the Urban-Rural Conflict
Creators: name: Shambaugh, Julie
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 1982

description: As urban areas grow in size and population, they rely more heavily on surrounding rural areas for additional land and water resources. Such a situation has arisen in North Carolina's Chapel Hill-Carrboro area, an attractive residential location in close proximity to growing Research Triangle Park. In the last decade, the population of the area and the number of people served by the Orange Water and Sewer Authority (OWASA) have increased by 33%. If the expected growth trend continues, OWASA must locate an additional, reliable source of raw water to meet the projected demands of its service area.
Elimination of the Translational Kinetic Energy Contamination in pre-Born-Oppenheimer Calculations
Creators: name: Simmen, Benjamin
name: Mátyus, Edit
name: Reiher, Markus
Publisher: name: arXiv
Year: 2012
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Atomic Physics (physics.atom-ph)
subject: Computational Physics (physics.comp-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In this paper we present a simple strategy for the elimination of the translational kinetic energy contamination of the total energy in pre-Born--Oppenheimer calculations carried out in laboratory-fixed Cartesian coordinates (LFCCs). The simple expressions for the coordinates and the operators are thus preserved throughout the calculations, while the mathematical form and the parametrisation of the basis functions are chosen so that the translational and rotational invariances are respected. The basis functions are constructed using explicitly correlated Gaussian functions (ECGs) and the global vector representation. First, we observe that it is not possible to parametrise the ECGs so that the system is at rest in LFCCs and at the same time the basis functions are square-integrable with a non-vanishing norm. Then, we work out a practical strategy to circumvent this problem by making use of the properties of the linear transformation between the LFCCs and translationally invariant and center-of-mass Cartesian coordinates as well as the transformation properties of the corresponding basis function parameter matrices. By exploiting these formal mathematical relationships we can identify and separate the translational contamination terms in the matrix representation of the kinetic energy operator in the LFCC formalism. We present numerical examples for the translational contamination and its elimination for the two lowest rotational energy levels of the singlet hydrogen molecule, corresponding to para- and ortho-H2, respectively, treated as four-particle quantum systems.
A new construction of Calabi-Yau manifolds: Generalized CICYs
Creators: name: Anderson, Lara B.
name: Apruzzi, Fabio
name: Gao, Xin
name: Gray, James
name: Lee, Seung-Joo
Publisher: name: Amsterdam : Elsevier Science Bv
Year: 2016
Subjects: subject: partial flag manifolds
subject: mirror symmetry
subject: f-theory
subject: nonperturbative superpotentials
subject: complete-intersections
subject: conifold transitions
subject: 2-parameter models
subject: vacua
subject: compactifications
subject: deformations
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: We present a generalization of the complete intersection in products of projective space (CICY) construction of Calabi-Yau manifolds. CICY three-folds and four-folds have been studied extensively in the physics literature. Their utility stems from the fact that they can be simply described in terms of a 'configuration matrix', a matrix of integers from which many of the details of the geometries can be easily extracted. The generalization we present is to allow negative integers in the configuration matrices which were previously taken to have positive semi-definite entries. This broadening of the complete intersection construction leads to a larger class of Calabi Yau manifolds than that considered in previous work, which nevertheless enjoys much of the same degree of calculational control. These new Calabi Yau manifolds are complete intersections in (not necessarily Fano) ambient spaces with an effective anticanonical class. We find examples with topology distinct from any that has appeared in the literature to date. The new manifolds thus obtained have many interesting features. For example, they can have smaller Hodge numbers than ordinary CICYs and lead to many examples with elliptic and K3-fibration structures relevant to F-theory and string dualities. (C) 2016 The Authors. Published by Elsevier B.V.
in silico Characterization Of Enzymatic Phospholipase A2 (SPLA2) Associated With The Venom Of Snakes In The Genus Bothrops
Creators: name: Combariza, Aldo F.
name: Campo Hernadez, Emmanuel
Publisher: name: Zenodo
Year: 2022

description: Snakes of genus Bothrops are feared creatures in tropical regions, including Colombia. We study a subgroup of compounds present in snake's venoms, PLA2, with potential medical applications. We propose an in silico study approach, using Molecular-Dynamics to characterize PLA2, in order to study its inherent Structure-BioActivity relationship.
Structure and significance of knowledge networks in two low-tech clusters in Poland
Creators: name: Abbasiharofteh, Milad
name: Dyba, Wojciech
Publisher: name: London : Routledge Taylor & Francis
Year: 2018
Subjects: subject: Geography
subject: Knowledge networks
subject: Co-location
subject: Low-tech clusters
subject: Dewey Decimal Classification::300 | Sozialwissenschaften, Soziologie, Anthropologie::330 | Wirtschaft

description: The co-location and networking of firms and institutions, also known as clustering, positively influences the innovativeness of firms. The cluster literature provides a single-sided understanding of how clusters function due to an overemphasis in the literature on clusters in high-tech and developed economies at the expense of clusters in low-tech industries in less-developed regions. Applying social network analysis (SNA), this paper studies two furniture clusters in the Wielkopolska region of Poland. The findings demonstrate that: (1) the critical factor is the impact of institutionalization on the mechanisms of knowledge flows, Marshall’s externalities and, in consequence, innovativeness of firms; and (2) the underlining clusters do not show a tendency to build cluster-external linkages, opposing the dominant premise in the cluster literature. In the absence of national and international relations, managers of small and medium-sized firms and local institutions are the main sources of novelty for the clusters at the sustaining stage of their life cycle. The findings pave the way for initiatives aiming at creating and developing knowledge networks in lagging and catching-up regions in Europe, particularly those specialized in low-tech sectors.
Privatization of Public Housing Projects Using Section 123 of the Housing and Community Development Act of 1987
Creators: name: Eisen, Dennis
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 1989

description: Recent legislation allows public housing projects to be sold to the tenants. This article describes the requirements of this process, and factors which must be taken into consideration in assessing the feasibility of a sale. The author presents two case studies of privatization of existing public housing projects. He describes how their purchase and rehabilitation are being financed, and points out that educational and social issues must also be addressed in order to ensure long-term economic viability for such conversions.
Comments on the Equity, Efficiency, Incidence and Politics of Impact Fee Methodologies
Creators: name: Duncan, James B.
name: Standerfer, Norman R.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 1987

description: Development impact fee systems are a controversial topic among developers and planners. This article proposes that the use of locationally-sensitive impact fee methodologies can have positive effects on the cost of development and the price of the final product. The authors caution local officials against jumping on the "development fee bandwagon," and using fees to raise new revenues rather than as a regulatory measure to meet growth needs.
title: Jean Combier und Anta Montet-White (Hrsg.), Solutré 1968–1998. Mémoires de la Société Préhistorique Française
Creators: name: Floss, Harald
Publisher: name: University Library Heidelberg
Year: 2016

description: Rezension zu: Jean Combier und Anta Montet-White (Hrsg.), Solutré 1968–1998. Mémoires de la Société Préhistorique Française, Band 30, Paris 2002. 281 Seiten.
Energy efficient routing in mobile ad-hoc networks for Healthcare Environments
Creators: name: Abid, Sohail
name: Shafi, Imran
name: Abid, Shahid
Publisher: name: arXiv
Year: 2013
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: The modern and innovative medical applications based on wireless network are being developed in the commercial sectors as well as in research. The emerging wireless networks are rapidly becoming a fundamental part of medical solutions due to increasing accessibility for healthcare professionals/patients reducing healthcare costs. Discovering the routes among hosts that are energy efficient without compromise on smooth communication is desirable. This work investigates energy efficiency of some selected proactive and reactive routing protocols in wireless network for healthcare environments. After simulation and analysis we found that DSR is best energy efficient routing protocol among DSR, DSDV and AODV, because DSR has maximum remaining energy.
description: 9 pages, 12 figures, 3 tables, IJCSI Journal
Linking Mobility and Context in North Carolina
Creators: name: Hartell, Ann
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2011

description: Context Sensitive Solutions (CSS) is a principledriven, consensus-based approach to planning, designing, building, maintaining and operating transportation facilities and programs. CSS promotes interdisciplinary collaboration, meaningful engagement of stakeholders and communities, and transportation solutions that balance vehicle mobility within a community and environmental context. CSS encourages the careful, deliberate consideration of community values and goals, the various functions and activities of residents, and sensitive ecosystems and habitats.
Pulsatilla alpina
Creators: name: Becherer
Publisher: name: Zenodo
Year: 1956
Subjects: Biodiversity
Taxonomy

description: H. alpina (L.) R. Br. Ssp.eu-alpina Braun-Blanquet (H. alpinaR.Er. s.str.) Cat. 33. Var. intermedia Glaab - 2: Sublage (P.). - 3: Gornergrat bei Zermatt (Brosi). - 4: Rappental (B.C.W.); Sulzgletscher(HohsteUigletscher),3000m (Wilczek). Var. incana Beauverd - 3:Cantine de Proz im Val d'Entremont (Beauverd). (Varietät von zweifelhafter systematischer Wertigkeit: Verf.) Ssp. brevicaulis (Rchb.) Are. (H. brevicaulis Hoppe, H. alp. var. brevicaulis Glaab) Cat. 33 und 421. Bis3415m:OberrothornbeiZermatt (Braun-Blanquet1919). 3:PenninischeKetteverbreitet. - 3a:ObdenAlpienseen (Becherer).
description: Published as part of Becherer, 1956, Florae Vallesiacae Supplementum, pp. 1-556 in Denkschriften der Schweizerischen Naturforschenden Gesellschaft 71 on pages 1-556
Unveiling and exemplifying the unitary equivalence of discrete time quantum walk models
Creators: name: Venancio, B F
name: Andrade, F M
name: da Luz, M G E
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: The two major discrete time formulations for quantum walks, coined and scattering, are unitarily equivalent for arbitrary position dependent transition amplitudes and any topology (PRA {\bf 80}, 052301 (2009)). Although the proof explicit describes the mapping obtention, its high technicality may hinder relevant physical aspects involved in the equivalence. Discussing concrete examples -- the most general constructions for the line, square and honeycomb lattices -- here we unveil the similarities and differences of these two versions of quantum walks. We moreover show how to derive the dynamics of one from the other by means of proper projections. We perform calculations for different probability amplitudes like, Hadamard, Grover, Discrete Fourier Transform and the uncommon in the area (but interesting) Discrete Hartley Transform, comparing the evolutions. Our study illustrates the models interplay, an important issue for implementations and applications of such systems.
description: 27 pages, 16 figures, published version
Reversible cation exchange on macroscopic CdSe/CdS and CdS nanorod based gel networks
Creators: name: Lübkemann, Franziska
name: Rusch, Pascal
name: Getschmann, Sven
name: Schremmer, Björn
name: Schäfer, Malte
name: Schulz, Marcel
name: Hoppe, Bastian
name: Behrens, Peter
name: Bigall, Nadja C.
name: Dorfs, Dirk
Publisher: name: Cambridge : RSC Publishing
Year: 2020
Subjects: subject: cation exchange reaction
subject: nanoparticles
subject: lyogels
subject: aerogels
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie

description: Over the past decades, cation exchange reactions applied to nanoparticles have opened up synthetic pathways to nanocrystals, which were not accessible by other means before. The limitation of cation exchange on the macroscopic scale of bulk materials is given by the limited ion diffusion within the crystal structure. Lyogels or aerogels are macroscopic, highly voluminous, porous materials composed of interconnected nanoscopic building blocks and hence represent a type of bridge between the macroscopic and the nanoscopic world. To demonstrate the feasibility of cation exchange on such macroscopic nanomaterials, the cation exchange on CdSe/CdS core/shell and CdS nanorod based lyogels to Cu2−xSe/ Cu2−xS and Cu2−xS and the reversible exchange back to CdSe/CdS and CdS lyogels is presented. These copper-based lyogels can also be used as an intermediate state on the way to other metal chalcogenidebased macroscopic structures. By reversed cation exchange back to cadmium an additional proof is given, that the crystal structures remain unchanged. It is shown that cation exchange reactions can also be transferred to macroscopic objects like aerogels or lyogels. This procedure additionally allows the access of aerogels which cannot be synthesized via direct destabilization of the respective colloidal solutions.
title: Stefan Eismann, Frühe Kirchen über römischen Grundmauern. Untersuchungen zu ihren Erscheinungsformen in Südwestdeutschland, Südbayern und der Schweiz
Creators: name: Ristow, Sebastian
Publisher: name: University Library Heidelberg
Year: 2016

description: Rezension zu: Stefan Eismann, Frühe Kirchen über römischen Grundmauern. Untersuchungen zu ihren Erscheinungsformen in Südwestdeutschland, Südbayern und der Schweiz. Freiburger Beiträge zur Archäologie und Geschichte des ersten Jahrtausends 8. Verlag Marie Leidorf, Rahden/Westf. 2004. 383 Seiten, zahlreiche Abbildungen und Karten.
A thermophysical analysis of the (1862) Apollo Yarkovsky and YORP effects
Creators: name: Rozitis, Ben
name: Duddy, Sam R.
name: Green, Simon F.
name: Lowry, Stephen C.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Near-Earth asteroid (1862) Apollo has strong detections of both orbital semimajor axis drift and rotational acceleration. We produce a unified model that can accurately match both observed effects using a single set of thermophysical properties derived from ground-based observations, and we determine Apollo's long term evolution. We use light-curve shape inversion techniques and the ATPM on published light-curve, thermal-infrared, and radar observations to constrain Apollo's thermophysical properties. The derived properties are used to make detailed predictions of Apollo's Yarkovsky and YORP effects, which are then compared with published measurements of orbital drift and rotational acceleration. The ATPM explicitly incorporates 1D heat conduction, shadowing, multiple scattering of sunlight, global self-heating, and rough surface thermal-infrared beaming in the model predictions. We find that ATPM can accurately reproduce the light-curve, thermal-infrared, and radar observations of Apollo, and simultaneously match the observed orbital drift and rotational acceleration using: a shape model with axis ratios of 1.94:1.65:1.00, an effective diameter of 1.55 +/- 0.07 km, a geometric albedo of 0.20 +/- 0.02, a thermal inertia of 140 +140/-100 J m-2 K-1 s-1/2, a highly rough surface, and a bulk density of 2850 +480/-680 kg m-3. Using these properties we predict that Apollo's obliquity is increasing towards the 180 degree YORP asymptotic state at a rate of 1.5 +0.3/-0.5 degrees per 10^5 yr. The derived thermal inertia suggests that Apollo has loose regolith material resting on its surface, which is consistent with Apollo undergoing a recent resurfacing event based on its observed Q-type spectrum. The inferred bulk density is consistent with those determined for other S-type asteroids, and suggests that Apollo has a fractured interior.
description: 15 pages, 7 figures, 4 tables. Accepted by A&A
Structure revision of cryptosporioptides and determination of the genetic basis for dimeric xanthone biosynthesis in fungi
Creators: name: Greco, Claudio
name: De Mattos-Shipley, Kate
name: Bailey, Andrew M.
name: Mulholland, Nicholas P.
name: Vincent, Jason L.
name: Willis, Christine L.
name: Cox, Russell J.
name: Simpson, Thomas J.
Publisher: name: Cambridge : Royal Society of Chemistry
Year: 2019
Subjects: subject: cryptosporioptides
subject: Chemistry
subject: biosynthesis
subject: Bioinformatic analysis
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie

description: Three novel dimeric xanthones, cryptosporioptides A–C were isolated from Cryptosporiopsis sp. 8999 and their structures elucidated. Methylation of cryptosporioptide A gave a methyl ester with identical NMR data to cryptosporioptide, a compound previously reported to have been isolated from the same fungus. However, HRMS analysis revealed that cryptosporioptide is a symmetrical dimer, not a monomer as previously proposed, and the revised structure was elucidated by extensive NMR analysis. The genome of Cryptosporiopsis sp. 8999 was sequenced and the dimeric xanthone (dmx) biosynthetic gene cluster responsible for the production of the cryptosporioptides was identified. Gene disruption experiments identified a gene (dmxR5) encoding a cytochrome P450 oxygenase as being responsible for the dimerisation step late in the biosynthetic pathway. Disruption of dmxR5 led to the isolation of novel monomeric xanthones. Cryptosporioptide B and C feature an unusual ethylmalonate subunit: a hrPKS and acyl CoA carboxylase are responsible for its formation. Bioinformatic analysis of the genomes of several fungi producing related xanthones, e.g. the widely occurring ergochromes, and related metabolites allows detailed annotation of the biosynthetic genes, and a rational overall biosynthetic scheme for the production of fungal dimeric xanthones to be proposed.
The Role of Vitamin D in Fertility and during Pregnancy and Lactation: A Review of Clinical Data
Creators: name: Pilz, Stefan
name: Zittermann, Armin
name: Obeid, Rima
name: Hahn, Andreas
name: Pludowski, Pawel
name: Trummer, Christian
name: Lerchbaum, Elisabeth
name: Pérez-López, Faustino R.
name: Karras, Spyridon N.
name: März, Winfried
Publisher: name: Basel : MDPI
Year: 2018
Subjects: subject: Vitamin D
subject: gestational diabetes
subject: pre-eclampsia
subject: breast milk
subject: vitamin D binding protein
subject: DBP
subject: brain
subject: autism
subject: 25-hydroxyvitamin D
subject: Dewey Decimal Classification::500 | Naturwissenschaften::570 | Biowissenschaften, Biologie

description: Vitamin D deficiency is common and there exists a huge gap between recommended dietary vitamin D intakes and the poor vitamin D supply in the general population. While vitamin D is important for musculoskeletal health, there are accumulating data suggesting that vitamin D may also be important for fertility, pregnancy outcomes and lactation. Significant changes in vitamin D metabolism during pregnancy such as increased production of the “active vitamin D hormone” calcitriol support the important role of vitamin D in this setting. Observational studies show that vitamin D deficiency is a risk marker for reduced fertility and various adverse pregnancy outcomes and is associated with a low vitamin D content of breast milk. Meta-analyses of randomized controlled trials (RCTs) document that physiological vitamin D supplementation during pregnancy is safe and improves vitamin D and calcium status, thereby protecting skeletal health. Although certain RCTs and/or meta-analyses reported some other beneficial effects, it is still not clear whether vitamin D supplementation improves fertility or decreases the risk of adverse pregnancy outcomes such as low birth weight, pre-eclampsia and neonatal mortality, or reduces wheeze/asthma in the infants. Nevertheless, vitamin D supplementation in pregnant women is frequently required to achieve a sufficient vitamin D status as recommended by nutritional vitamin D guidelines. In this review, we provide an overview of systematic reviews, meta-analyses and large trials reporting clinical data on the role of vitamin D for fertility, pregnancy and lactation.
title: Markups and inflation during the COVID-19 pandemic
Creators: name: Bilyk, Olga
name: Grieder, Timothy
name: Khan, Mikael
Publisher: name: Bank of Canada
Year: 2023

description: We find that prices and costs for consumer-oriented firms moved roughly one-for-one during the COVID-19 pandemic. This means firms fully passed rising costs through to the prices they charged. However, our results are suggestive, given data limitations and the uncertainty associated with estimating markups.
description: Nous constatons que les prix et les coûts des entreprises axées sur la consommation ont évolué à peu près dans les mêmes proportions pendant la pandémie de COVID-19. Cela signifie que les entreprises ont répercuté intégralement la hausse de leurs coûts sur les prix qu’elles facturaient. Toutefois, compte tenu des lacunes dans les données et des incertitudes liées à l’estimation des ratios de marge, nos résultats doivent être considérés comme indicatifs plutôt que probants.
Forging Ahead and Lagging Behind: An Analysis of Convergence and Economic Development in North Carolina
Creators: name: Wubneh, Mulatu
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2004

description: This paper analyzes trends in economic development in North Carolina to determine whether there has been evidence of per capita income convergence in the state during the period 1970-2000. The analyses reveal that (a) there has been a process of convergence of per capita income in the state in the past three decades, and (b) income convergence in NC occurred during a period of economic expansion and divergence during economic decline. However, a comparative analysis of metro and non-metro counties as well as among traditional geographic areas indicates that there was a general trend of divergence in metro areas and convergence in non-metro areas. This trend suggests that there are pockets of affluence and pockets of poverty existing side by side in the state. The regression analyses reveal that while the initial level of per capita income, human resource development and population growth had a significant impact on income growth, the impact of urbanization and investment in infrastructure was weak. The analysis on economic structure shows that employment in manufacturing had a major impact but employment in agriculture and services did not.
A lower radius and mass for the transiting extrasolar planet HAT-P-8b
Creators: name: Mancini, L.
name: Southworth, J.
name: Ciceri, S.
name: Fortney, J. J.
name: Morley, C. V.
name: Dittmann, J. A.
name: Tregloan-Reed, J.
name: Bruni, I.
name: Barbieri, M.
name: Evans, D. F.
name: D'Ago, G.
name: Nikolov, N.
name: Henning, Th.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Context. The extrasolar planet HAT-P-8 b was thought to be one of the more inflated transiting hot Jupiters. Aims. By using new and existing photometric data, we computed precise estimates of the physical properties of the system. Methods. We present photometric observations comprising eleven light curves covering six transit events, obtained using five medium-class telescopes and telescope-defocussing technique. One transit was simultaneously obtained through four optical filters, and two transits were followed contemporaneously from two observatories. We modelled these and seven published datasets using the jktebop code. The physical parameters of the system were obtained from these results and from published spectroscopic measurements. In addition, we investigated the theoretically-predicted variation of the apparent planetary radius as a function of wavelength, covering the range 330-960 nm. Results. We find that HAT-P-8 b has a significantly lower radius (1.321 R_Jup) and mass (1.275 M_Jup) compared to previous estimates (1.50 R_Jup and 1.52 M_Jup respectively). We also detect a radius variation in the optical bands that, when compared with synthetic spectra of the planet, may indicate the presence of a strong optical absorber, perhaps TiO and VO gases, near the terminator of HAT-P-8 b. Conclusions. These new results imply that HAT-P-8 b is not significantly inflated, and that its position in the planetary mass-radius diagram is congruent with those of many other transiting extrasolar planets.
description: 12 pages, 7 figures, to appear in Astronomy & Astrophysics
Sustaining Traditional Sea Island Communities
Creators: name: Morais, Nina
name: Bobrow, Sarah
name: McDomick, Joseph
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 1995

description: A Carolina Planning interview with representatives of the Sea Islands Preservation Project, St. Helena Island, South Carolina, March 1994. The Sea Islands off the coast of South Carolina and Georgia are being overtaken by rapid, poorly planned development. One casualty is the islands' fragile environment. Another is the islands' unique African-American culture. Sprawling suburbs and exclusive resort "plantations" are quickly displacing the islands' vulnerable black communities. For Sea Island blacks [known as the Gullah], whose distinctive language, music, cuisine, and crafts make them the most African of all African-Americans, the process of development has rightly been called 'cultural genocide'.
Systematic review and meta-analysis of randomised controlled trials on the effects of yoga in people with Parkinson’s disease
Creators: name: Suárez-Iglesias, David
name: Santos, Luis
name: Sanchez-Lastra, Miguel A.
name: Ayán, Carlos
Publisher: name: Taylor & Francis
Year: 2021
Subjects: subject: Medicine
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences

description: Yoga may be a beneficial treatment for people with Parkinson’s disease (PD). However, no studies have critically reviewed and meta-analyzed the scientific evidence for yoga’s benefits regarding motor and non-motor symptoms. The purpose of this study was to conduct a systematic review and meta-analysis on the effectiveness of yoga as a rehabilitation strategy for PD. Following the Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines, a literature search was performed using MEDLINE/PubMed, PEDro, SPORTDiscus, and Scopus. Studies addressing any concepts on the impact of yoga intervention on physical and psychological outcomes in people with PD were included. Fourteen RCTs were selected, with heterogeneous protocols and outcomes measures. Yoga interventions were safe and well-accepted for patients with mild to moderate PD. The descriptive analysis indicated that its practice might provide both physical and psychological benefits. Preliminary evidence showed that yoga has comparable or superior efficacy to exercise. A subsequent meta-analysis on five RCTs detected that yoga was more effective than passive control in ameliorating motor symptoms. Yoga appears to be a promising rehabilitative therapy for individuals with PD. Recommendations are proposed for future studies.IMPLICATIONS FOR REHABILITATIONYoga is a safe and feasible therapy for people with mild to moderate PD.Yoga practice positively impacts physical and mental health in this population.When compared to exercise, yoga showed to have similar or even greater effects. Yoga is a safe and feasible therapy for people with mild to moderate PD. Yoga practice positively impacts physical and mental health in this population. When compared to exercise, yoga showed to have similar or even greater effects.
Variation in the escape fraction of ionising photons from galaxies and the redshifted 21-cm power spectrum during reionization
Creators: name: Kim, Han-Seek
name: Wyithe, J. Stuart B.
name: Park, Jaehong
name: Lacey, C. G.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The observed power spectrum of redshifted 21cm fluctuations is known to be sensitive to the astrophysical properties of the galaxies that drove reionization. Thus, detailed measurements of the 21cm power spectrum and its evolution could lead to measurements of the properties of early galaxies that are otherwise inaccessible. In this paper, we study the effect of mass and redshift dependent escape fractions of ionizing radiation on the ability of forthcoming experiments to constrain galaxy formation via the redshifted 21cm power spectrum. We use a model for reionization which combines the hierarchical galaxy formation model GALFORM implemented within the Millennium-II dark matter simulation, with a semi-numerical scheme to describe the resulting ionization structure. Using this model we show that the structure and distribution of ionised regions at fixed neutral fraction, and hence the slope and amplitude of the 21 cm power spectrum, is dependent on the variation of ionising photon escape fraction with galaxy mass and redshift. However, we find that the influence of the unknown escape fraction and its evolution is smaller than the dominant astrophysical effect provided by SNe feedback strength in high redshift galaxies. The unknown escape fraction of ionizing radiation from galaxies is therefore unlikely to prevent measurement of the properties of high redshift star formation using observations of the 21cm power spectrum.
description: 8 pages, 5 figures, Submitted to MNRAS. arXiv admin note: substantial text overlap with arXiv:1203.3598
Pulsed squeezed-light generation in a waveguide with second-subharmonic generation and periodic corrugation
Creators: name: Perina, Jan
Publisher: name: arXiv
Year: 2013
Subjects: subject: Optics (physics.optics)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Quantum pulsed second-subharmonic generation in a planar waveguide with a small periodic corrugation at the surface is studied. Back-scattering of the interacting fields on the corrugation enhances the nonlinear interaction giving larger values of squeezing. The problem of back-scattering is treated by perturbation theory, using the Fourier transform for non-dispersion propagation, and by numerical approach in the general case. Optimum spectral modes for squeezed-light generation are found using the Bloch-Messiah reduction. Improvement in squeezing and increase of numbers of generated photons are quantified for the corrugation resonating with the fundamental and second-subharmonic field. Splitting of the generated pulse by the corrugation is predicted.
description: 18 pages, 20 figures
Development of Digital Shadows for Production Control
Creators: name: Schuh, Günther
name: Gützlaff, Andreas
name: Schmidhuber, Matthias
name: Maibaum, Judith
Publisher: name: Hannover : publish-Ing.
Year: 2021
Subjects: subject: Digital Shadow
subject: Production planning and control
subject: Data analysis
subject: Internet of Production
subject: Konferenzschrift
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau

description: Production controllers have to make short-term decisions on the adjustment of production processes. Existing IT systems do not fully meet the information needs and functional requirements of production controllers and provide insufficient support for the decision-making process. The idea of Digital Shadows addresses this challenge by providing the user with the relevant information for a specific purpose consequently supporting the process of decision-making. This is achieved by linking, aggregating and analyzing production data from various sources. In this paper, an approach for the development of Digital Shadows for production control is presented. The approach comprises the three levels of Digital Shadows for production control: 1) data offers, 2) information requirements and 3) analysis methods. To describe the data offers, the relevant data and data sources identified and categorized. The information requirements are derived from the decisions in production control. To link the data offers and information requirements the relations between the data and the tasks of production control are modeled. At the analysis methods level, existing production control analysis methods are examined and categorized. Additionally, an approach for the application of the analysis methods to the data is explored. The approach for the development of Digital Shadows was further on applied in order to create an exemplary Digital Shadow for production control.