cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Heat transfer and pressure drop in an artificially roughened tube at various Prandtl numbers
Creators: name: Hastrup, Rolf C.
Publisher: name: California Institute of Technology
Year: 1958
Subjects: subject: Mechanical Engineering
subject: FOS: Mechanical engineering

description: NOTE:  Text or symbols not renderable in plain ASCII are indicated by [...]. Abstract is included in .pdf document.

An experimental investigation was carried out to provide additional data for the study of heat transfer and its relation to friction in rough tubes. Tests were conducted on a tube of given roughness with the results expressed in terms of the heat transfer coefficient ([...]) and the friction coefficient ([...]). In order to demonstrate the effect of Prandtl Number ([sigma]), results were obtained over a range (6 <[sigma]< 1). This range was obtained by varying the temperature of the test fluid, distilled water, from 70-300[degrees]F in a pressurized system. The tests were carried out under forced convection using an artifically roughened, 3/8 inch diameter tube which was heated electrically by passing a high alternating current axially through its thin wall. Initial tests conducted with a smooth tube checked very well with known data and theory, with only small discrepancies at low Prandtl Number. Results for the rough tube confirm that both [...]and [...] increase with roughness. For the type roughness used, however, [...] increased only 35-50% while [...] increased 60-65% (lower percentage values appearing near [sigma] = 1) indicating that the ratio [...] decreases for increasing roughness.
Urchin: A Reverse Ray Tracer for Astrophysical Applications
Creators: name: Altay, Gabriel
name: Theuns, Tom
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We describe URCHIN, a reverse ray tracing radiative transfer scheme optimised to model self-shielding from the post-reionisation ultraviolet (UV) background in cosmological simulations. The reverse ray tracing strategy provides several benefits over forward ray tracing codes including: (1) the preservation of adaptive density field resolution (2) completely uniform sampling of gas elements by rays; (3) the preservation of galilean invariance; (4) the ability to sample the UV background spectrum with hundreds of frequency bins; and (5) exact preservation of the input UV background spectrum and amplitude in optically thin gas. The implementation described here focuses on Smoothed Particle Hydrodynamics (SPH). However, the method can be applied to any density field representation in which resolution elements admit ray intersection tests and can be associated with optical depths. We characterise the errors in our implementation in stages beginning with comparison to known analytic solutions and ending with a realistic model of the z = 3 cosmological UV background incident onto a suite of spherically symmetric models of gaseous galactic halos.
description: 17 pages, updated to match version published in MNRAS; 2013MNRAS.tmp.1731A
Europa und die griechische Aufklärung. Eine Bildungsaufgabe des Griechischunterrichts
Creators: name: Barone, Paul
Publisher: name: Pegasus-Onlinezeitschrift
Year: 2017

description: „Wir brauchen Aufklärung im besten Sinne des Wortes“ (Johannes Rau) – Aufklärung, verstanden als Versuch, den Menschen durch Vernunft zu befreien, bleibt auch heutzutage ein vorrangiges Bildungs­ziel. Unter diesem Gesichtspunkt geht der Aufsatz der Frage nach, wie der Griechischunterricht dazu beitragen kann, den Schülerinnen und Schülern Aufklärung als eine der grundlegenden Orientierungen unserer europäischen Kultur zu vermitteln. Es wird eine Unterrichtseinheit vorgestellt, die versucht, im Vergleich mit der modernen Aufklärung die griechischen Ursprünge des europäischen Vernunft- und Freiheitsdenkens freizulegen und nach deren bleibender Bedeutung zu fragen.
description: Pegasus-Onlinezeitschrift, Bd. 8, Nr. 2 (2008): Pegasus-Onlinezeitschrift
A multi-opinion evolving voter model with infinitely many phase transitions
Creators: name: Shi, Feng
name: Mucha, Peter J.
name: Durrett, Rick
Publisher: name: arXiv
Year: 2013
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Social and Information Networks (cs.SI)
subject: Probability (math.PR)
subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: We consider an idealized model in which individuals' changing opinions and their social network coevolve, with disagreements between neighbors in the network resolved either through one imitating the opinion of the other or by reassignment of the discordant edge. Specifically, an interaction between $x$ and one of its neighbors $y$ leads to $x$ imitating $y$ with probability $(1-α)$ and otherwise (i.e., with probability $α$) $x$ cutting its tie to $y$ in order to instead connect to a randomly chosen individual. Building on previous work about the two-opinion case, we study the multiple-opinion situation, finding that the model has infinitely many phase transitions. Moreover, the formulas describing the end states of these processes are remarkably simple when expressed as a function of $β= α/(1-α)$.
description: 15 pages, 6 figures
Realization and connectivity of the graphs of origami flat foldings
Creators: name: Eppstein, David
Publisher: name: Journal of Computational Geometry
Year: 2019

description: We investigate the graphs formed from the vertices and creases of an origami pattern that can be folded flat along all of its creases. As we show, this is possible for a tree if and only if the internal vertices of the tree all have even degree greater than two. However, we prove that (for unbounded sheets of paper, with a vertex at infinity representing a shared endpoint of all creased rays) the graph of a folding pattern must be 2-vertex-connected and 4-edge-connected.
description: Journal of Computational Geometry, Vol. 10 No. 1 (2019)
СТАРЕНИЕ ВЛИЯЕТ НА ИНДУКЦИЮ ДЕЛЕНИЯ ПОКОЯЩИХСЯ СТВОЛОВЫХ КЛЕТОК ГИППОКАМПА ПРОНЕЙРОГЕННЫМИ СТИМУЛАМИ
Creators: name: Мальцев. Д.И.
name: Аниол В.А.
name: Белоусов В.В.
name: Гуляева Н.В.
name: Подгорный О.В.
Publisher: name: Нейротехнологии будущего: тезисы участников конференции «Нейрокампус 2022: старт!» (04–07 сентября 2022 г.)
Year: 2022
Subjects: постнатальный нейрогенез
стволовые клетки гиппокампа
пролиферация

description: С применением нового метода для детекции de novo делящихся клеток, мы показываем, что пронейрогенные стимулы, мемантин и электроконвульсивная терапия, активируют деление покоящихся стволовых клеток зубчатой извилины гиппокампа и старение влияет на эффективность этой активации.
Simplices modelled on spaces of constant curvature
Creators: name: Dyer, Ramsay
name: Vegter, Gert
name: Wintraecken, Mathijs Hubertus Maria Johannes
Publisher: name: Journal of Computational Geometry
Year: 2019

description: We give non-degeneracy criteria for Riemannian simplices based on simplices in spaces of constant sectional curvature. It extends previous work (SoCG15) on Riemannian simplices, where we developed Riemannian simplices with respect to Euclidean reference simplices. The criteria we give in this article are in terms of quality measures for spaces of constant curvature that we develop here. We see that simplices in spaces that have nearly constant curvature, are already non-degenerate under very weak quality demands. This is of importance because it allows for sampling of Riemannian manifolds based on anisotropy of the manifold and not (absolute) curvature.
description: Journal of Computational Geometry, Vol. 10 No. 1 (2019)
Quantum discord cannot be shared
Creators: name: Streltsov, Alexander
name: Zurek, Wojciech H.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Niels Bohr proposed that the outcome of the measurement becomes objective and real, and, hence, classical, when its results can be communicated by classical means. In this work we revisit Bohr's postulate using modern tools from the quantum information theory. We find a full confirmation of Bohr's idea: if a measurement device is in a nonclassical state, the measurement results cannot be communicated perfectly by classical means. In this case some part of information in the measurement apparatus is lost in the process of communication: the amount of this lost information turns out to be the quantum discord. The information loss occurs even when the apparatus is not entangled with the system of interest. The tools presented in this work allow to generalize Bohr's postulate: we show that for pure system-apparatus states quantum communication does not provide any advantage when measurement results are communicated to more than one recipient. We further demonstrate the superiority of quantum communication to two recipients on a mixed system-apparatus state and show that this effect is fundamentally different from quantum state cloning.
description: 5 pages, 3 figures
Covering many points with a small-area box
Creators: name: De Berg, Mark
name: Cabello, Sergio
name: Cheong, Otfried
name: Eppstein, David
name: Knauer, Christian
Publisher: name: Journal of Computational Geometry
Year: 2019

description: Let $P$ be a set of $n$ points in the plane. We show how to find, for a given integer $k>0$, the smallest-area axis-parallel rectangle that covers $k$ points of $P$ in $O(nk^2 \log n+ n\log^2 n)$ time. We also consider the problem of, given a value $\alpha>0$, covering as many points of $P$ as possible with an axis-parallel rectangle of area at most $\alpha$. For this problem we give a probabilistic $(1-\varepsilon)$-approximation that works in near-linear time: In $O((n/\varepsilon^4)\log^3 n \log (1/\varepsilon))$ time we find an axis-parallel rectangle of area at most $\alpha$ that, with high probability, covers at least $(1-\varepsilon)\kappa^*$ points, where $\kappa^*$ is the maximum possible number of points that could be covered.
description: Journal of Computational Geometry, Vol. 10 No. 1 (2019)
On the tree-width of knot diagrams
Creators: name: Schleimer, Saul
name: De Mesmay, Arnaud
name: Purcell, Jessica
name: Sedgwick, Eric
Publisher: name: Journal of Computational Geometry
Year: 2019

description: We show that a small tree-decomposition of a knot diagram induces a small sphere-decomposition of the corresponding knot. This, in turn, implies that the knot admits a small essential planar meridional surface or a small bridge sphere. We use this to give the first examples of knots where any diagram has high tree-width. This answers a question of Burton and of Makowsky and Marino.
description: Journal of Computational Geometry, Vol. 10 No. 1 (2019)
On the structure of Schnyder woods on orientable surfaces
Creators: name: Knauer, Kolja
name: Gonçalves, Daniel
name: Leveque, Benjamin
Publisher: name: Journal of Computational Geometry
Year: 2019

description: We propose a simple generalization of Schnyder woods from the plane to maps on orientable surfaces of higher genus. This is done in the language of angle labelings. Generalizing results of de Fraysseix and Ossona de Mendez, and Felsner, we establish a correspondence between these labelings and orientations and characterize the set of orientations of a map that correspond to such a Schnyder labeling. Furthermore, we study the set of these orientations of a given map and provide a natural partition into distributive lattices depending on the surface homology. This generalizes earlier results of Felsner and Ossona de Mendez. In the particular case of toroidal triangulations, this study enables us to identify a canonical lattice that lies at the core of several bijection proofs.
description: Journal of Computational Geometry, Vol. 10 No. 1 (2019)
The Influence of Radial Stellar Migration on the Chemical Evolution of the Milky Way
Creators: name: Wang, Yue
name: Zhao, Gang
Publisher: name: arXiv
Year: 2013
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Stellar migration is an important dynamical process in Galactic disk. Here we model the radial stellar migration in the Galactic disk with an analytical method, then add it to detailed Galactic chemical evolution model to study the influence of radial stellar migration on the chemical evolution of the Milky Way, especially for the abundance gradients. We found that the radial stellar migration in the Galactic disk can make the profile of the G-dwarf metallicity distribution of the solar neighborhood taller and narrower, thus it becomes another solution to the "G-dwarf problem". It can also scatter the age-metallicity relation. However, after the migration, the abundance distributions along the Galactic radius don't change much, namely the abundance gradients would not be flattened by the radial stellar migration, which is different from the predictions of many theoretical works. But it can flatten the radial gradients of the mean chemical abundance of stars, and older stars possess flatter abundance gradients than younger stars. The most significant effect of the radial stellar migration on the chemical abundance is that at a position it scatters the abundance of stars there from a relatively concentrated value to a range.
description: 12 pages, 14 figures
title: Erbmaterial von Erregern vergleichen, um Krankheitsausbrüche aufzuklären: Stellungnahme Nr. 047/2019 des BfR vom 28. November 2019
Creators: name: Bundesinstitut Für Risikobewertung
Publisher: name: Bundesbehörden und Einrichtungen im Geschäftsbereich des Bundesministeriums für Ernährung und Landwirtschaft (BMEL)
Year: 2019
Subjects: subject: 000

description: BfR-Stellungnahmen, vol. 2019, no. 047
New Actions for Modified Gravity and Supergravity
Creators: name: Ketov, Sergei V.
name: Terada, Takahiro
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We extend the f(R) gravity action by including a generic dependence upon the Weyl tensor, and further generalize it to supergravity by using the super-curvature (R) and super-Weyl (W) chiral superfields in N=1 chiral curved superspace. We argue that our (super)gravitational actions are the meaningful extensions of the phenomenological f(R) gravity and its locally supersymmetric generalization towards their UV completion and their embedding into superstring theories. The proposed actions can be used for study of cosmological perturbations and gravitational instabilities due to a nonvanishing Weyl tensor in gravity and supergravity.
description: 15 pages, minor revision for version 2 (published version)
Measuring similarity between curves on 2-manifolds via homotopy area
Creators: name: Chambers, Erin Wolf
name: Wang, Yusu
Publisher: name: Journal of Computational Geometry
Year: 2019

description: Measuring the similarity of curves is a fundamental problem arising in many application fields. There has been considerable interest in several such measures, both in Euclidean space and in more general setting such as curves on Riemannian surfaces or curves in the plane minus a set of obstacles. However, so far, efficiently computable similarity measures for curves on general surfaces remain elusive. This paper aims at developing a natural curve similarity measure that can be easily extended and computed for curves on general orientable 2-manifolds. Specifically, we measure similarity between homotopic curves based on how hard it is to deform one curve into the other one continuously, and define this "hardness'' as the minimum possible surface area swept by a homotopy between the curves. We consider cases where curves are embedded in the plane or on a triangulated orientable surface with genus $g$, and we present efficient algorithms (which are either quadratic or near linear time, depending on the setting) for both cases. The results are also extended to comparing simple cycles (simple closed curves) in the plane or on a sphere, although the algorithms become less efficient by a factor of n. We also discuss the case of cycles on surfaces, which remains open.
description: Journal of Computational Geometry, Vol. 10 No. 1 (2019)
Controlling and measuring quantum transport of heat in trapped-ion crystals
Creators: name: Bermudez, A.
name: Bruderer, M.
name: Plenio, M. B.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Measuring heat flow through nanoscale systems poses formidable practical difficulties as there is no `ampere meter' for heat. We propose to overcome this problem by realizing heat transport through a chain of trapped ions. Laser cooling the chain edges to different temperatures induces a current of local vibrations (vibrons). We show how to efficiently control and measure this current, including fluctuations, by coupling vibrons to internal ion states. This demonstrates that ion crystals provide a suitable platform for studying quantum transport, e.g., through thermal analogues of quantum wires and quantum dots. Notably, ion crystals may give access to measurements of the elusive large fluctuations of bosonic currents and the onset of Fourier's law. These results are supported by numerical simulations for a realistic implementation with specific ions and system parameters.
description: closer to published version
Minimax rates for estimating the dimension of a manifold
Creators: name: Kim, Jisu
name: Rinaldo, Alessandro
name: Wasserman, Larry
Publisher: name: Journal of Computational Geometry
Year: 2019

description: Many algorithms in machine learning and computational geometry require, as input, the intrinsic dimension of the manifold that supports the probability distribution of the data. This parameter is rarely known and therefore has to be estimated. We characterize the statistical difficulty of this problem by deriving upper and lower bounds on the minimax rate for estimating the dimension. First, we consider the problem of testing the hypothesis that the support of the data-generating probability distribution is a well-behaved manifold of intrinsic dimension $d_1$ versus the alternative that it is of dimension $d_2$, with $d_{1}
description: Journal of Computational Geometry, Vol. 10 No. 1 (2019)
An abstract approach to polychromatic coloring: shallow hitting sets in ABA-free hypergraphs and pseudohalfplanes
Creators: name: Keszegh, Balázs
name: Pálvölgyi, Dömötör
Publisher: name: Journal of Computational Geometry
Year: 2019

description: The goal of this paper is to give a new, abstract approach to cover-decomposition and polychromatic colorings using hypergraphs on ordered vertex sets. We introduce an abstract version of a framework by Smorodinsky and Yuditsky, used for polychromatic coloring halfplanes, and apply it to so-called {\em ABA-free hypergraphs}, which are a generalization of interval graphs. Using our methods, we prove that $(2k-1)$-uniform ABA-free hypergraphs have a polychromatic $k$-coloring, a problem posed by the second author. We also prove the same for hypergraphs defined on a point set by pseudohalfplanes. These results are best possible. We could only prove slightly weaker results for dual hypergraphs defined by pseudohalfplanes, and for hypergraphs defined by pseudohemispheres. We also introduce another new notion that seems to be important for investigating polychromatic colorings and $\epsilon$-nets, shallow hitting sets. We show that all the above hypergraphs have shallow hitting sets, if their hyperedges are containment-free.
description: Journal of Computational Geometry, Vol. 10 No. 1 (2019)
The motion of a sphere in a cylinder filled with a viscous liquid and with a diameter slightly larger than the sphere diameter
Creators: name: Snel, Hermanus
Publisher: name: California Institute of Technology
Year: 1970
Subjects: Aeronautics

description: The flow around a sphere, moving under the influence of gravity in a long cylinder filled with a viscous liquid, is investigated, for the case where the inside diameter of the tube is only slightly larger than the diameter of the sphere.

For low Reynolds numbers, an extension of the Christopherson and Dowson (1) theory is obtained in the form of a first order Reynolds number correction. It is shown that the fluid exerts a first order inertial force on the ball, tending to increase the eccentricity ratio. The sideways motion of the ball due to this force has been calculated approximately.

For very high Reynolds numbers, a potential flow solution has been found in the form of a Fourier series. This solution also yields a force tending to increase the eccentricity ratio.

Experiments have been done for intermediate Reynolds numbers. The motion of the ball appears to be unstable when the Reynolds number exceeds a critical value (about 10).
A theoretical investigation of a method of increasing the performance of rocket propellants for use in torpedoes by the injection of water
Creators: name: Olsen, Leslie Richard
Publisher: name: California Institute of Technology
Year: 1946
Subjects: Aeronautics
Aeronautical Engineering

description: In this report it is shown that water injection into the rocket motor of a rocket propelled torpedo increases the range at a given speed.  For a 5000 lb. torpedo having a 1750 lb. warhead, the use of a hydrogen peroxide-nitromethane-water combination yields a range about 50 percent above that which would be obtained by the use of nitromethane or of acid-aniline propellants.

Theoretically, the use of water injection increases the specific thrust, i.e., thrust per unit mass rate of flow of propellant carried.  The specific thrust is increases by water injection up to 18.5 percent for nitromethane and up to 89.1 percent for liquid oxygen and octane; the specific thrust for acid and aniline, at a mixture ratio of 3, is increases up to 27.1%.

Data calculated from experimental work in connection with gas generation has shown that the increase of specific thrust for nitromethane is up to about 11.7% at L* = 868; the specific thrust measured in connection with gas generation work using acid and aniline, at a mixture ratio of 3, is increased 24.8%.
The dark side of the $μ$: on multiple solutions to renormalisation group equations, and why the CMSSM is not necessarily being ruled out
Creators: name: Allanach, B. C.
name: George, Damien P.
name: Gripaios, Ben
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: When solving renormalisation group equations in a quantum field theory, one often specifies the boundary conditions at multiple renormalisation scales, such as the weak and grand-unified scales in a theory beyond the standard model. A point in the parameter space of such a model is usually specified by the values of couplings at these boundaries of the renormalisation group flow, but there is no theorem guaranteeing that such a point has a unique solution to the associated differential equations, and so there may exist multiple, phenomenologically distinct solutions, all corresponding to the same point in parameter space. We show that this is indeed the case in the constrained minimal supersymmetric standard model (CMSSM), and we exhibit such solutions, which cannot be obtained using out-of-the-box computer programs in the public domain. Some of the multiple solutions we exhibit have CP-even lightest Higgs mass predictions between 124 and 126 GeV. Without an exhaustive 11-dimensional MSSM parameter scan per CMSSM parameter point to capture all of the multiple solutions, CMSSM phenomenological analyses are incomplete.
description: 21 pages, 7 figures; v2: some clarifications and minor changes, matches journal version
Correct light deflection in Weyl conformal gravity
Creators: name: Cattani, Carlo
name: Scalia, Massimo
name: Laserra, Ettore
name: Bochicchio, Ivana
name: Nandi, Kamal K.
Publisher: name: arXiv
Year: 2013
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The conformal gravity fit to observed galactic rotation curves requires γ>0. On the other hand, conventional method for light deflection by galaxies gives a negative contribution to Schwarzschild value for γ>0, which is contrary to observation. Thus, it is very important that the contribution to bending should in principle be positive, no matter how small its magnitude is. Here we show that the Rindler-Ishak method gives a positive contribution to Schwarzschild deflection for γ>0, as desired. We also obtain the exact local coupling term derived earlier by Sereno. These results indicate that conformal gravity can potentially test well against all astrophysical observations to date.
description: 6 pages
Römische Bronzen aus Deutschland
Creators: name: Furtwängler, Adolf
Publisher: name: Bonner Jahrbücher
Year: 2017

description: [nicht vorhanden / not available]
description: Bonner Jahrbücher, Bd. 103 (1898): Bonner Jahrbücher : Jahrbücher des Vereins von Altertumsfreunden im Rheinlande
Bemerkungen zu den Weihgeschenken an Juppiter Dolichenus
Creators: name: Loeschcke, Georg
Publisher: name: Bonner Jahrbücher
Year: 2017

description: [nicht vorhanden / not available]
description: Bonner Jahrbücher, Bd. 107 (1901): Bonner Jahrbücher : Jahrbücher des Vereins von Altertumsfreunden im Rheinlande
Zwei Münzfunde aus Niederbieber
Creators: name: Ritterling, Emil
Publisher: name: Bonner Jahrbücher
Year: 2017

description: [nicht vorhanden / not available]
description: Bonner Jahrbücher, Bd. 107 (1901): Bonner Jahrbücher : Jahrbücher des Vereins von Altertumsfreunden im Rheinlande
Buruncum - Worringen, nicht Bürgel
Creators: name: Cramer, Franz
Publisher: name: Bonner Jahrbücher
Year: 2017

description: [nicht vorhanden / not available]
description: Bonner Jahrbücher, Bd. 107 (1901): Bonner Jahrbücher : Jahrbücher des Vereins von Altertumsfreunden im Rheinlande
Some new measurements of the ground and v2 = 1 states of HDO in the region 200 - 750 GHz
Creators: name: Kelly, Melissa Ann
Publisher: name: California Institute of Technology
Year: 2003
Subjects: water remote sensing
rotational spectroscopy
Chemistry
HDO
deuterated water
submillimeter spectroscopy

description: To facilitate measurements of HDO in molecular clouds, late-type stars and planetary atmospheres, several new lines of HDO were measured between 200 and 750 GHz.  The measurements were done in a one-meter gas flow cell, with specially constructed diode multiplier sources and a liquid helium cooled InSb hot-electron bolometer.  The lines measured were of very low intensity, thanks to their higher J and K values.  Both a-type and b-type transitions were observed, in the vibrational ground state (000) and the first excited bending state (010).  These lines were added to existing HDO spectral lines and fit using a least-squares regression of an Euler series Hamiltonian that has proven useful in the analysis of molecules with large vibrational amplitudes.  The results were comparable in precision to existing analyses.  The data will be beneficial to two upcoming remote sensing missions designed to investigate the far IR and microwave regions: SOFIA, an airborne observatory that will carry a 2.5m telescope and detectors into the upper atmosphere, and the Herschel space observatory, a cryogenically cooled 3.5m telescope that will operate at the L2 Lagrangian point some 1.5 million km from the Earth.
Römische Wohnstätten in Bonn
Creators: name: Schultze, Rudolf
Publisher: name: Bonner Jahrbücher
Year: 2017

description: [nicht vorhanden / not available]
description: Bonner Jahrbücher, Bd. 106 (1901): Bonner Jahrbücher : Jahrbücher des Vereins von Altertumsfreunden im Rheinlande
The upgrade of the ALICE Inner Tracking System
Creators: name: Senyukov, Serhiy
Publisher: name: arXiv
Year: 2013
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: ALICE is a general purpose experiment dedicated to the study of nucleus-nucleus collisions at LHC. After more than 3 years of successful operation, an upgrade of the apparatus during the second long shutdown of LHC (LS2) in 2017/18 is in preparation. One of the major goals of the proposed upgrade is to extend the physics reach for rare probes at low transverse momentum. The reconstruction of the rare probes requires a precise determination of the primary and secondary vertices that is performed in ALICE by the Inner Tracking System (ITS). The present ITS made of 6 layers of three technologies of silicon devices allows, for example, to reconstruct D mesons with the transverse momentum down to ~2 GeV/c. Further extension of this range towards lower pT requires the installation of the new ITS consisting of 7 layers of silicon detectors with significantly better single point resolution and reduced material budget. It is expected that the new system will allow to improve the impact parameter resolution by a factor of ~3. Moreover, the data rate capability of the upgraded ITS should be significantly improved in order to exploit the full expected LHC lead-lead interaction rate of 50 kHz, almost two orders of magnitude above the present readout rate. The present contribution describes first the ITS upgrade requirements followed by the conceptual design of the new system and its expected performance. Secondly, an overview of the different R&D activities from the concept towards the final detector is given.
description: Proceedings of the 13th Vienna Conference on Instrumentation, 11-15 February 2013 v2: References updated v3: Typos corrected
Anfertigung von Kopien der mittelalterlichen Wandmalereien der Rheinprovinz
Creators: name: Clemen, Paul
Publisher: name: Bonner Jahrbücher
Year: 2017

description: [nicht vorhanden / not available]
description: Bonner Jahrbücher, Bd. 106 (1901): Bonner Jahrbücher : Jahrbücher des Vereins von Altertumsfreunden im Rheinlande
title: A high performance Open API platform for disaster management, integrating UAVs, mobile and IOT devices
Creators: name: Kyritsis, Sarantis
Publisher: name: Technical University of Crete
Year: 2019

description: Search and rescue (SAR) constitutes a crucial, recurrent and integral challenge for civil protection entities. With the use of current technology, multiple parts of a SAR mission can be inter-connected in real-time, by using multiple aspects from the world of GIS systems, as well as leveraging the capabilities of embedded systems for on the fly application deployment. Multiple approaches have been undertaken so far towards bridging these fields, but the proposed system is utilizing the advantageous elements of primary memory databases, as well as the performance of statically typed compiled languages, such as Golang. The goal of this thesis is the creation of an Open API, real time and highly performant disaster management system. The key elements of this system are that it is easily deployable, easily configurable and implements a variety of different communication protocols. The drive for this implementation is that the resulting system can be deployed on any Linux-based embedded system, works with a variety of messaging protocols and is completely agnostic of the underlying network infrastructure. For the creation of this platform, a variety of technologies have been used. The deployment system is based on docker containerization, the programming language is Golang, while the main database used is Redis. The resulting platform has been thoroughly stress tested in handling loads of transactions, simulating high load real world scenarios. Through this platform, multiple field agents (i.e. drones, rescuers, volunteers, teams of people) can coordinate their actions by utilizing whatever available network infrastructure is still operating, or can be easily deployed on the spot. Moreover, people that are facing problems (i.e. cannot move, are injured, or are trapped) can directly send their position, as well as their status through this platform, so that the responding rescuers can approach them efficiently. Performance tests indicate that the system can handle 33269 concurrent requests per second regarding creations and updates of data in the system and 57543 concurrent requests per second fetching data from the platform. To put things into perspective an ArcGIS Server REST 2D Vector mapping services supports up to 79,710 requests per hour, and a heavily optimized PostGIS installation can reach up to 7432 requests per second. The final system offers a real-time disaster management platform, heavily optimized for fast messaging performance between the users of the platform, and mainly oriented towards team coordination in SAR operations.
Europa. Ikarus. Orpheus. Abendländische Symbolfiguren in Ovids Metamorphosen. Fächerverbindende Projekte. Bearb. v. Friedrich Maier
Creators: name: Unger, Hans Dietrich
Publisher: name: Forum Classicum
Year: 2017

description: Rezension zu: Europa. Ikarus. Orpheus. Abendländische Symbolfiguren in Ovids Metamorphosen. Fächerverbindende Projekte. Bearb. v. Friedrich Maier. Bamberg: Buchner 1998. 88 S. 19,40 DM. (Antike und Gegenwart; ISBN 3-7661-5948-8). Lehrerkommentar. 87S. 19,40DM (ISBN3-7661- 5958-5).
description: Forum Classicum, Nr. 4 (1998): Forum Classicum
title: Μελέτη παραγωγής δέσμης αρνητικών ιόντων μεγάλου ρεύματος - μεγάλης ενέργειας και φωτο-ουδετεροποίησή της για τη χρήση σε αντιδραστήρες Tokamak
title: Study on the production of a high-power negative ion beam and its photoneutralization for use in Tokamaks
Creators: name: Περράκης, Κωνσταντίνος
Publisher: name: Technical University of Crete
Year: 2019

description: Για την θέρμανση του πλάσματος σε μια μηχανής πυρηνικής σύντηξης για παραγωγή καθαρής ενέργειας όπως οι ITER και DEMO, απαιτείται συνεχής παροχή ενέργειας. Μία μέθοδος για να επιτευχθεί αυτό είναι η εισαγωγή στο πλάσμα μιας δέσμης ουδέτερων σωματίων ισοτόπων του υδρογόνου (Neutral Beam Heating). Η παρούσα διατριβή συμβάλλει στην ανάπτυξη μιας μεθόδου παραγωγής δέσμης ουδέτερων σωματίων υδρογόνου μέσω της παραγωγής, επιτάχυνσης και εξαγωγής αρνητικών ιόντων υδρογόνου ιόντων από μια μαγνητικά μονωμένη δίοδο. Στην παρούσα εργασία γίνεται προσομοίωση της διόδου λαμβάνοντας υπόψη τις διάφορες γεωμετρικές και φυσικές παραμέτρους αυτής (εφαρμοζόμενη διαφορά δυναμικού, ένταση μαγνητικού πεδίου) καθώς και του πλάσματος που δημιουργείται μέσα της (θερμοκρασία, είδος και πυκνότητα σωματιδίων) και εκτελούνται αριθμητικοί υπολογισμοί για την επιτάχυνση και την εξαγωγή μιας δέσμης αρνητικών ιόντων. Το πλάσμα της καθόδου από το οποίο εξάγονται τα ιόντα μπορεί να παραχθεί από αλληλεπίδραση λέιζερ με cluster ενώ η μαγνητική μόνωση χρησιμοποιείται για τον διαχωρισμό αρνητικών ιόντων και ηλεκτρονίων. Ένα αριθμητικό μοντέλο δύο ρευστών σε κυλινδρική γεωμετρία περιγράφει την χωροχρονική εξέλιξη των αρνητικών ιόντων και των ηλεκτρονίων μέσα στην δίοδο. Τα αποτελέσματα του κώδικα χρησιμοποιούνται για επιβεβαίωση πειραματικών δεδομένων που αφορούν παλμικές συσκευές υψηλής ενέργειας και υψηλού ρεύματος αρνητικών ιόντων από την διεθνή βιβλιογραφία, προκειμένου να διερευνηθούν οι φυσικές διαδικασίες της εξαγωγής και επιτάχυνσης της δέσμης. Τα αποτελέσματα έδειξαν ότι ο κώδικας παράγει αποτελέσματα που βρίσκονται σε συμφωνία με τα πειραματικά δεδομένα στις αντίστοιχες φυσικές καιγεωμετρικές παραμέτρους. Η χρήση λέιζερ προτείνεται επίσης ως μέσο ουδετεροποίησης της δέσμης των αρνητικών ιόντων προς παραγωγή ουδετέρων, με την μέθοδο της φωτο-απόσπασης, με σκοπό αφ' ενός την μεγαλύτερη απόδοση της διάταξης και αφ' ετέρου την επαναχρησιμοποίηση του ίδιου συστήματος λέιζερ τόσο για την παραγωγή του πλάσματος όσο και για την ουδετεροποίηση της δέσμης, με σκοπό την οικονομία κλίμακος. Η πρωτοτυπία της παρούσης εργασίας συνίσταται στο ότι ενώ οι σχετικές επιστημονικές μέθοδοι είναι θεμελιωμένες εδώ και χρόνια, δεν έχουν προταθεί ξανά για εφαρμογή σε μηχανές Tokamak, ενώ γίνεται φανερό ότι παρέχουν συγκριτικά πλεονεκτήματα σε σχέση με άλλες για την θέρμανση πλάσματος. Η συμβολή στην επιστήμη συνίσταται στην απόδειξη με τη βοήθεια των προσομοιώσεων και της σύγκρισης με πειραματικά αποτελέσματα ότι η μαγνητικά μονωμένη δίοδος μπορεί να παραγάγει μεγάλης ισχύος ουδέτερες δέσμες υδρογόνου ή δευτερίου από ουδετεροποίηση μεγάλης ενέργειας και μεγάλου ρεύματος δέσμης αρνητικών ιόντων.
Calorimetry of GRB 030329: Simultaneous Fitting to the Broadband Radio Afterglow and the Observed Image Expansion Rate
Creators: name: Mesler, Robert
name: Pihlström, Ylva
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We perform calorimetry on the bright gamma ray burst (GRB) 030329 by fitting simultaneously the broadband radio afterglow and the observed afterglow image size to a semi-analytic magnetohydrodynamical (MHD) and afterglow emission model. Our semi-analytic method is valid in both the relativistic and non-relativistic regimes, and incorporates a model of the interstellar scintillation that substantially effects the broadband afterglow below 10 GHz. The model is fitted to archival measurements of the afterglow flux from 1 day to 8.3 years after the burst. Values for the initial burst parameters are determined and the nature of the circumburst medium is explored. Additionally, direct measurements of the lateral expansion rate of the radio afterglow image size allow us to estimate the initial Lorentz factor of the jet.
description: 8 pages, 4 figures. Accepted for publication by Astrophysical Journal
Strengthening Competitiveness of Multinationals through Relocation of Production to Asia: An Advance Study
Creators: name: Feyerlein, Daniel
Publisher: name: Zenodo
Year: 2021
Subjects: Business strategy
strategy
competitiveness
country of origin
manufacturing relocation
made in Germany
made in Asia
operations management
procurement strategy
plant location
sourcing

description: This article asks whether a strategic opportunity exists for a company producing products with the label ‘Made in Germany’ to relocate production to Asia while retaining German engineering. This article focuses on the prevailing market situations of several multinational corporations based in Germany, which are encountering growing competition from Asia due to disadvantages in product price, delivery costs and transportation time that are related to a non-adapted and non-future oriented sourcing concept. Through an empirical research study, respondents from Asia were asked about their willingness to accept the price of a ‘Made in Germany’ product, the importance of price, their opinion about delivery issues, and their acceptance of local production in Asia. Total responses of N = 636 (100.0%) were collected, including n = 108 (17.0%) responses from Asia. The results are addressed to strategic management for German companies that can gain competitiveness through a relocation of production to Asia while considering long-term requirements. The results of the study suggest that the fundamental strategy of pairing German engineering with local production in Asia is worth pursuing in which the market conditions of tomorrow are considered. The results show also, that prevailing sourcing strategies of German multinationals may be wrong and therefore require an adaptation due to future market and customer realities.
Ausgrabungen in Vetera 1932-1934
Creators: name: Oelmann, Franz
Publisher: name: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts
Year: 2017

description: [nicht erschienen / not available]
description: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts, Bd. 18, Nr. 4 (1934)
Effective $F(T)$ gravity from the higher-dimensional Kaluza-Klein and Randall-Sundrum theories
Creators: name: Bamba, Kazuharu
name: Nojiri, Shin'ichi
name: Odintsov, Sergei D.
Publisher: name: arXiv
Year: 2013
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We explore the four-dimensional effective $F(T)$ gravity with $T$ the torsion scalar in teleparallelism originating from higher-dimensional space-time theories, in particular the Kaluza-Klein (KK) and Randall-Sundrum (RS) theories. First, through the KK dimensional reduction from the five-dimensional space-time, we obtain the four-dimensional effective theory of $F(T)$ gravity with its coupling to a scalar field. Second, taking the RS type-II model in which there exist the five-dimensional Anti-de Sitter (AdS) space-time with four-dimensional Friedmann-Lemaître-Robertson-Walker (FLRW) brane, we find that there will appear the contribution of $F(T)$ gravity on the four-dimensional FLRW brane. It is demonstrated that inflation and the dark energy dominated stage can be realized in the KK and RS models, respectively, due to the effect of only the torsion in teleparallelism without that of the curvature.
description: 5 pages, no figure, version accepted for publication in Physics Letters B
Dark Entangled Steady States of Interacting Rydberg Atoms
Creators: name: Rao, D. D. Bhaktavatsala
name: Mølmer, Klaus
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We propose a scheme for rapid generation of high fidelity steady state entanglement between a pair of atoms. A two-photon excitation process towards long-lived Rydberg states with finite pairwise interaction, a dark state interference effect in the individual atoms, and spontaneous emission from their short-lived excited states lead to rapid, dissipative formation of an entangled steady state. We show that for a wide range of physical parameters, this entangled state is formed on a time scale given by the strengths of coherent Raman and Rabi fields applied to the atoms, while it is only weakly dependent on the Rydberg interaction strength.
description: 4 Pages, 3 figures + Supplementary Information [Phys. Rev. Lett. 111, 033606]
Duality and Decay of Macroscopic F-Strings
Creators: name: Skliros, Dimitri P.
name: Copeland, Edmund J.
name: Saffin, Paul M.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study the decay of fundamental string loops of arbitrary size L/min(n,m)>>\sqrt{α'}, labelled by (n,m;λ_n,\barλ_m), where n,m correspond to left- and right-mover harmonics and λ_n,\barλ_m to polarisation tensors, and find that a description in terms of the recent coherent vertex operator construction of Hindmarsh and Skliros is computationally very efficient. We primarily show that the decay rates and mass shifts of vertex operators (n,m;λ_n,\barλ_m) and their "duals" (n,m;λ_n,\barλ_m^*) are equal to leading order in the string coupling, implying for instance that decay rates of epicycloids equal those of hypocycloids. We then compute the power and decay rates associated to massless IR radiation for the trajectory (1,1;λ_1,\barλ_1), and find that it is precisely reproduced by the low energy effective theory of Dabholkar and Harvey. Guided by this correspondence, we conjecture the result for arbitrary trajectories (n,m;λ_n,\barλ_m) and discover a curious relation between gravitational and axion plus dilaton radiation. It is now possible to start exploring string evolution in regimes where a low energy effective description is less useful, such as in the vicinity of cusps.
description: 5 pages
PolicyCraft: Supporting Collaborative and Participatory Policy Design through Case-Grounded Deliberation
Creators: name: Kuo, Tzu-Sheng
name: Chen, Quan Ze
name: Zhang, Amy X.
name: Hsieh, Jane
name: Zhu, Haiyi
name: Holstein, Kenneth
Publisher: name: arXiv
Year: 2024
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: FOS: Computer and information sciences

description: Community and organizational policies are typically designed in a top-down, centralized fashion, with limited input from impacted stakeholders. This can result in policies that are misaligned with community needs or perceived as illegitimate. How can we support more collaborative, participatory approaches to policy design? In this paper, we present PolicyCraft, a system that structures collaborative policy design through case-grounded deliberation. Building on past research that highlights the value of concrete cases in establishing common ground, PolicyCraft supports users in collaboratively proposing, critiquing, and revising policies through discussion and voting on cases. A field study across two university courses showed that students using PolicyCraft reached greater consensus and developed better-supported course policies, compared with those using a baseline system that did not scaffold their use of concrete cases. Reflecting on our findings, we discuss opportunities for future HCI systems to help groups more effectively bridge between abstract policies and concrete cases.
Non-maximal θ_{23}, large θ_{13} and tri-bimaximal θ_{12} via quark-lepton complementarity at next-to-leading order
Creators: name: Harada, Junpei
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We show that the next-to-leading order corrections in the quark-lepton complementarity are important to explain the observed pattern of neutrino mixing. In particular, the next-to-leading order corrections 1) lead to a deviation of θ_{23} from maximal mixing, 2) reduce the predicted value of $\sin^2 2θ_{13}$ by 9.8%, 3) provide the same value of $\sin^2 θ_{12}$ as that of the tri-bimaximal mixing. This is shown by calculating $\sin^2 2θ_{ij} (i,j=1,2,3)$ to ${\cal O}(λ^6)$ in the framework in which the product of the CKM and PMNS matrices is bimaximal.
description: 14 pages, 3 figures, a version to appear in EPL
4MC10_pdf_Our Story_Oral Histories of Women from Turkey
Creators: name: Camcı, Meral
Publisher: name: Loughborough University
Year: 2021
Subjects: subject: 220306 Feminist Theory
subject: FOS: Philosophy, ethics and religion
subject: 200205 Culture, Gender, Sexuality
subject: FOS: Other humanities
subject: History
subject: Gender studies

description: This is a transcribed version of one of the interviews we conducted for our project "Women's Media and Memory". In this project, we aim to record and archive women's memories in Turkey by conducting oral history interviews. In the light of this research, we want to look at feminist understanding of Turkey's history through women's narratives.
 Please visit the project website for more information
 https://www.bizimhikayemiz.org/
Synthesis and monoamine oxidase A/B inhibitory evaluation of new benzothiazole-thiazolylhydrazine derivatives
Creators: name: Turan, Gülhan
name: Osmaniye, Derya
name: Sağlik, Begüm Nurpelin
name: Çevik, Ulviye Acar
name: Levent, Serkan
name: Çavuşoğlu, Betül Kaya
name: Özkay, Ümide Demir
name: Özkay, Yusuf
name: Kaplancikli, Zafer Asım
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Biochemistry
subject: Medicine
subject: Pharmacology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: 60506 Virology
subject: FOS: Biological sciences

description: In this study, a novel series of benzothiazole-thiazolylhydrazine (3a–3i) was synthesized and their structures were characterized by 1H-NMR, 13C-NMR spectrometry, and mass spectroscopy. These compounds were evaluated as inhibitors of type A and type B monoamine oxidase (MAO) enzymes. The most active compound 3b (2-((2-(2-(4-(4-Nitrophenyl)thiazol-2-yl)hydrazineylidene)-2-phenylethyl)thio)benzothiazole) showed strong inhibitory activity at hMAO-A (IC50 of 0.095 ± 0.004 µM). Furthermore, compound 3i (2-((2-(2-(4-(2,4-dichlorophenyl)thiazol-2-yl)hydrazineylidene)-2-phenylethyl)thio)benzothiazole) showed significant inhibition profile on hMAO-A with the IC50 values 0.141 ± 0.006 µM.