cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Process design of a novel combination of peel grinding and deep rolling
Creators: name: Denkena, Berend
name: Kroedel, Alexander
name: Gartzke, Tobias
Publisher: name: Berlin : Springer
Year: 2022
Subjects: subject: Deep rolling
subject: Grinding
subject: Process combination
subject: Topography
subject: Process design
subject: Surface properties
subject: Surface roughness
subject: Cycle process
subject: Cycle time
subject: Finishing operation
subject: Novel process
subject: Process costs
subject: Roughing operations
subject: Tensile residual stress
subject: Time cost
subject: Grinding (machining)
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau

description: Grinding is mostly considered as a finishing operation by which a high surface quality is achieved. An increase in productivity is therefore limited by maintained surface properties such as the roughness or tensile residual stresses. Thus, a roughing operation is inevitable followed by a finishing operation, while both operations are separated, leading to larger cycle times and process costs. In this paper, a novel process combination is investigated in which the roughing is done by grinding and the finishing operation by deep rolling within one tool setup. In this way, both processes are conducted parallel within the primary processing time. The objective of this study is the knowledge of the characteristics of this process combination with regard to the workpiece surface integrity. Therefore, shafts are ground in peel grinding with varying grinding wheel types and process parameters and subsequently machined with deep rolling. The process combination is evaluated with regard to the process forces and the resulting surface properties. In addition, experiments using the process combination were conducted in order to investigate the transferability of the results towards the process combination. By this approach, it was found that the surface roughness was reduced up to 80% by deep rolling showing the potential of the process combination. © 2021, The Author(s).
Tree-level Amplitudes in the Nonlinear Sigma Model
Creators: name: Kampf, Karol
name: Novotny, Jiri
name: Trnka, Jaroslav
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study in detail the general structure and further properties of the tree-level amplitudes in the SU(N) nonlinear sigma model. We construct the flavor-ordered Feynman rules for various parameterizations of the SU(N) fields U(x), write down the Berends-Giele relations for the semi-on-shell currents and discuss their efficiency for the amplitude calculation in comparison with those of renormalizable theories. We also present an explicit form of the partial amplitudes up to ten external particles. It is well known that the standard BCFW recursive relations cannot be used for reconstruction of the the on-shell amplitudes of effective theories like the SU(N) nonlinear sigma model because of the inappropriate behavior of the deformed on-shell amplitudes at infinity. We discuss possible generalization of the BCFW approach introducing "BCFW formula with subtractions" and with help of Berends-Giele relations we prove particular scaling properties of the semi-on-shell amplitudes of the SU(N) nonlinear sigma model under specific shifts of the external momenta. These results allow us to define alternative deformation of the semi-on-shell amplitudes and derive BCFW-like recursion relations. These provide a systematic and effective tool for calculation of Goldstone bosons scattering amplitudes and it also shows the possible applicability of on-shell methods to effective field theories. We also use these BCFW-like relations for the investigation of the Adler zeroes and double soft limit of the semi-on-shell amplitudes.
description: 57 pages, 14 figures
title: Archäologische Informationen, Vol 10, No 1 (1987): Archäologische Informationen
Creators: name: DGUF E.V.
Publisher: name: University Library Heidelberg
Year: 2016

description: Handel
description: Handel
description: Titel
 Vorwort...4-5
 Inhalt...6-7
 Archäologischer Nachweis eisenzeitlichen Salzhandels von der Nordseeküste ins Rheinland...8-14
 Mittelalterlicher Binnenhandel mit Keramikbechern aus dem Raum Dreihausen bei Marburg...28-29
 Dimensionen des Handels in rezenten Stammeskulturen: Enthographische Beispiele aus Neuguinea...30-41
 Kartierung von Fundstellen auf Luftaufnahmen im Maßstab 1:1.000. Ein Erfahrungsbericht...68-71
 Archäologische "Bildung" von Museumsbesuchern im Spiegel eines Computer-Fragespiels...72-81
 Vom Jäger zum Städter. Niederrheinisches Museum Duisburg...85
 "Römerstraße" und "Villa rustica"...85-86
 Mainz und Southampton - Die Spaltung der Weltarchäologie? Der 11. Weltkongreß der UISPP...42-47
 Archäometrie - eine Disziplin im Spannungsfeld zwischen Geistes- und Naturwissenschaften...48-67
 Nachlese zum Aktuellen Thema der Arch.Inf. 9 Heft 2, 1986. Erhaltung: Mit einem Bein - oder allen Vieren - im Sumpf. Eine spezifische Art des Sterbens und archäologischen Überlebens eiszeitlicher und holozäner Großtiere...87
 Forager-Farmer Interaction: Processes in the Neolithic Colonization of Central Europe...88-89
 Das Magdalénien von Andernach. Rohmaterial und Bearbeitungstechnik der Steinartefakte...89-91
 Untersuchungen zur Keramik des 3. und 2. Jahrtausends v. Chr. aus dem Wadi Shaw, Nord-Sudan...94-96
 Umweltgeschichtliche Aspekte des Neolithikums in Thessalien...97-99
 Neolithische und bronzezeitliche Pflugspuren in Norddeutschland und in den Niederlanden...99-101
 Das Spiel "Zivilisation". F. Tresham, Hartland Trefoil, 1981...102-103
 Nachrichten...107-108
 Deutsche Gesellschaft für Ur- und Frühgeschichte (DGUF)...116
Creation of entangled atomic states by an analogue of the Dynamical Casimir effect
Creators: name: Lange, K.
name: Peise, J.
name: Luecke, B.
name: Gruber, T.
name: Sala, A.
name: Polls, A.
name: Ertmer, Wolfgang
name: Julia-Diaz, B.
name: Santos, L.
name: Klempt, C.
Publisher: name: Bristol : Institute of Physics Publishing (IOP)
Year: 2018
Subjects: subject: entanglement
subject: Dynamical Casimir effect
subject: spin dynamics
subject: Bose-Einstein condensate
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: If the boundary conditions of the quantum vacuum are changed in time, quantum field theory predicts that real, observable particles can be created in the initially empty modes. Here, we realize this effect by changing the boundary conditions of a spinor Bose-Einstein condensate, which yields a population of initially unoccupied spatial and spin excitations. We prove that the excitations are created as entangled pairs by certifying continuous-variable entanglement within the many-particle output state.
X-ray properties of the Northern Galactic Cap AGNs in the 58-month Swift-BAT catalog
Creators: name: Vasudevan, Ranjan V.
name: Brandt, William N.
name: Mushotzky, Richard F.
name: Winter, Lisa M.
name: Baumgartner, Wayne H.
name: Shimizu, Thomas T.
name: Schneider, Donald P.
name: Nousek, John A.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present a detailed X-ray spectral analysis of a complete sample of hard X-ray selected AGN in the Northern Galactic Cap of the 58-month Swift Burst Alert Telescope (Swift/BAT) catalog, consisting of 100 AGN with b>50deg. This region has excellent potential for further study due to the availability of a wide range of archival multi-wavelength data, and we propose it as a low-redshift analog to the `deep fields' work on AGN at higher redshifts. We present distributions of luminosity, absorption, and other key quantities, from fitting new and archival X-ray data gathered from XMM-Newton, Swift/XRT, ASCA and Swift/BAT. We probe to deeper redshifts than the 9-month BAT catalog (=0.043), and uncover a broader absorbing column density distribution. The fraction of obscured (log N_H >= 22) objects in the sample is ~60%, and 43--56% of the sample exhibits `complex' 0.4--10keV spectra. The soft excess is either well-detected in AGN or undetected, suggesting that the process responsible for producing the soft excess is not ubiquitous. The fraction of Compton-thick sources in our sample is ~9%, and `hidden/buried AGN' constitute ~14% of our sample. Compton reflection is found to be important in a large fraction of our sample using joint XMM-Newton+BAT fits (reflection amplitude = 2.7 +/- 0.75), indicating light bending or extremely complex absorption. The average 1--10keV spectrum for the sample reproduces the 1--10keV X-ray background slope as found for the 9-month BAT AGN sample. The completeness limit for the sample is ~4 times fainter than that for the 9-month catalog (abridged).
description: Accepted for publication in ApJ, 40 pages, 30 figures, 8 tables
title: Das EU-Projekt ARCHES und sein Handbuch zur archäologischen Archivierung
Creators: name: Stoll-Tucker, Bettina
Publisher: name: University Library Heidelberg
Year: 2015

description: Zur Erleichterung grenzüberschreitender Ur- und Frühgeschichtsforschung in Europa, aber auch zur besseren Orientierung in unterschiedlichen Erfassungs- und Archivsystemen, ist es sinnvoll und notwendig, die Begrifflichkeiten und den Aufbau archäologischer Archive länderübergreifend zu strukturieren und auf eine vergleichbare Basis zu stellen. Das Ziel sollte sein, alle archäologischen Aktivitäten stets in ein langfristig beständiges, geordnetes und zugängliches Archiv münden zu lassen. Anregungen und Hilfestellung dazu gibt die hier vorgestellte Publikation „Archäologische Archivierung in Europa: ein Handbuch“, die die internationale Arbeitsgruppe ARCHES des EAC in den Jahren 2012-2014 erarbeitet hat.
description: To facilitate cross-border pre- and protohistoric research in Europe, but also for orientation within different documentary and archiving systems, it is useful and necessary to structure terms and concepts of archaeological archives and put them on a comparable basis. The aim is to have all archaeological projects result in a permanently stable, ordered, and accessible archive. Suggestions and assistance are provided by “A Standard and Guide to Best Practice for Archaeological Archiving in Europe” presented here, which has been prepared by the international working group ARCHES of the EAC in the years 2012-2014.
Chemische Gasphasensynthese von oxidischen Nanopartikeln
Creators: name: Köpper, Nils
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2013
Subjects: subject: Chemical vapor synthesis
subject: nanoparticles
subject: gasphase process
subject: Gasphasensynthese
subject: Nanopartikel
subject: CVS
subject: YSZ
subject: AZO
subject: ZnO:Al
subject: ZrO2:Y
subject: Al2O3:I
subject: TiO2:I
subject: Al4Bi2O9
subject: Bi2O3
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie

description: [no abstract]
Collective modes and superfluidity of a two-dimensional ultracold Bose gas
Creators: name: Singh, Vijay Pal
name: Mathey, Ludwig
Publisher: name: College Park, MD : APS
Year: 2021
Subjects: subject: Bosons
subject: Collective modes
subject: Emergent phenomenon
subject: Induced heating
subject: Interaction strength
subject: 530

description: The collective modes of a quantum liquid shape and impact its properties profoundly, including its emergent phenomena such as superfluidity. Here we present how a two-dimensional Bose gas responds to a moving lattice potential. In particular, we discuss how the induced heating rate depends on the interaction strength and the temperature. This study is motivated by the recent measurements of Sobirey [arXiv:2005.07607], for which we provide a satisfying understanding. Going beyond the existing measurements, we demonstrate that this probing method allows us to identify two sound modes in quantum liquids. We show that the two sound modes undergo hybridization as a function of interaction strength, which we propose to detect experimentally. This gives insight into the two regimes of Bose gases, defined via the hierarchy of sound modes.
title: Martin Rundqvist, In the landscape and between worlds: Bronze Age deposition sites around lakes Mälaren and Hjälmaren in Sweden. Archaeology and Environmment 29. Umeå 2015
Creators: name: Hansen, Svend
Publisher: name: University Library Heidelberg
Year: 2015

description: Rezension zu: Martin Rundqvist, In the landscape and between worlds: Bronze Age deposition sites around lakes Mälaren and Hjälmaren in Sweden. Archaeology and Environmment 29. Umeå: Umeå Universitet 2015. ISBN 978 91 7601 213 0. 153 Seiten, 49 Tafeln und zahlreiche Tabellen.
Semiclassical two-step model for ionization by a strong laser pulse: further developments and applications
Creators: name: Shvetsov-Shilovski, N.I.
Publisher: name: Berlin ; Heidelberg : Springer
Year: 2021
Subjects: subject: Laser pulses
subject: Laser recording
subject: Perturbation techniques
subject: Further development
subject: Hydrogen molecule
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: We review the semiclassical two-step model for strong-field ionization. The semiclassical two-step model describes quantum interference and accounts for the ionic potential beyond the semiclassical perturbation theory. We discuss formulation and implementation of this model, its further developments, as well as some of the applications. The reviewed applications of the model include strong-field holography with photoelectrons, multielectron polarization effects in ionization by an intense laser pulse, and strong-field ionization of the hydrogen molecule.
title: Susanne Moraw, Anna Kieburg (Hrsg.). Mädchen im Altertum / Girls in Antiquity. Frauen – Forschung – Archäologie 11, 2014
Creators: name: Matić, Uroš
Publisher: name: University Library Heidelberg
Year: 2015

description: Rezension zu: Susanne Moraw, Anna Kieburg (Hrsg.). Mädchen im Altertum / Girls in Antiquity. Frauen – Forschung – Archäologie 11, 2014. Münster: Waxmann. 436 Seiten. ISBN 978-3-8309-3101-0.
What makes businesses commit to nature conservation?
Creators: name: Krause, Marlen S.
name: Droste, Nils
name: Matzdorf, Bettina
Publisher: name: New York, NY [u.a.] : Wiley
Year: 2021
Subjects: subject: biodiversity
subject: corporate responsibility
subject: ecosystem services
subject: structural equation modelling
subject: sustainable development
subject: theory of planned behaviour
subject: Dewey Decimal Classification::300 | Sozialwissenschaften, Soziologie, Anthropologie::330 | Wirtschaft

description: To halt the loss of biodiversity and ecosystem services, various actors including companies need to engage, but it is not yet clear what drives voluntary business commitments. We explore leverage points that might increase corporate action for conservation. We apply a structural equation model based on the theory of planned behaviour to analyse data from 618 German companies, collected through an online-survey in 2019. We show that a favourable attitude, driven by perceived business relevance and benefit prospects, fosters engagement. Perceived difficulties, such as lacking finances and knowledge, hinder the engagement. Customers, employees and the general public are presently the only stakeholder groups that drive corporate conservation engagement. Nevertheless, the expectation levels of virtually all stakeholders were found to be quite low and as such inadequate for the ecological crisis we face. We discuss how political will and goal setting can encourage more widespread business support for the natural environment.
Grad's moment method for relativistic gas mixtures of Maxwellian particles
Creators: name: Kremer, Gilberto M.
name: Marques, Wilson
Publisher: name: arXiv
Year: 2013
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Mixtures of relativistic gases are analyzed within the framework of Boltzmann equation by using Grad's moment method. A relativistic mixture of $r$ constituent is characterized by the moments of the distribution function: particle four-flows, energy-momentum tensors and third-order moment tensors. By using Eckart's decomposition and introducing $13r+1$ scalar fields -- related with the four-velocity, temperature of the mixture, particle number densities, diffusion fluxes, non-equilibrium pressures, heat fluxes and pressure deviator tensors -- Grad's distribution functions are obtained. Grad's distribution functions are used to determine the third-order tensors and their production terms for mixtures whose constituent's rest masses are not too disparate, so that it follows a system of $13r+1$ scalar field equations. By restricting to a binary mixture characterized by the six fields of partial particle number densities, four-velocity and temperature, the remainder 21 scalar equations are used to determine the constitutive equations for the non-equilibrium pressures, diffusion fluxes, pressure deviator tensors and heat fluxes. Hence the Navier-Stokes and generalized Fourier and Fick laws are obtained and the transport coefficients of bulk and shear viscosities, thermal conductivity, diffusion, thermal-diffusion and diffusion-thermal are determined. Furthermore, solutions of the relativistic field equations for the binary mixture are obtained in form of forced and free waves. In the low frequency limiting case the phase velocity and the attenuation coefficient are determined for forced waves. In the small wavenumber limiting case it is shown that there exist four longitudinal eigenmodes, two of them corresponding to propagating sound modes and two associated with non-propagating diffusive modes.
description: 25 pages, 3 figures, to be published in Physics of Fluids
Comparison of the frequency and phenotypic profile of Mycobacterium tuberculosis-specific CD4 T cells between the site of disease and blood in pericardial tuberculosis.
Creators: name: Du Bruyn, Elsa
name: Ruzive, Sheena
name: Howlett, Patrick
name: Jacobs, Ashley J
name: Arlehamn, Cecilia S Lindestam
name: Sette, Alessandro
name: Sher, Alan
name: Mayer-Barber, Katrin D
name: Barber, Daniel L
name: Mayosi, Bongani
name: Ntsekhe, Mpiko
name: Wilkinson, Robert J
name: Riou, Catherine
Publisher: name: The Francis Crick Institute
Year: 2022
Subjects: subject: Model organisms
subject: Infectious Disease
subject: Human Biology & Physiology
subject: Immunology
subject: FOS: Clinical medicine

description: Studies of the immune response at the site of disease in extra-pulmonary tuberculosis (EPTB) disease are scarce. In this study, we compared the cellular profile of Mycobacterium tuberculosis (Mtb)-specific T cells in pericardial fluid and peripheral blood in patients with pericardial TB (PCTB). Whole blood and pericardial fluid (PCF) samples were collected at the time of diagnostic sampling, with repeat blood sampling after completion of anti-tubercular treatment (ATT) in 16 PCTB patients, most of them being HIV-1 infected (n=14). These samples were stimulated ex vivo and the phenotypic and functional cellular profile of PCF and blood was assessed by flow cytometry. We found that lymphocytes were the predominant cell type in PCF in PCTB, with a preferential influx of CD4 T cells. The frequencies of TNF-α producing Mtb-specific granulocytes and Mtb-specific CD4 T cells were significantly higher in PCF compared to blood. Mtb-specific CD4 T cells in PCF exhibited a distinct phenotype compared to those in blood, with greater GrB expression and lower CD27 and KLRG1 expression. We observed no difference in the production IFNγ, TNF or IL-2 by Mtb-specific CD4 T cells between the two compartments, but MIP-1β production was lower in the PCF T cells. Bacterial loads were not associated with alterations in the phenotype or function of Mtb-specific CD4 T cells. Upon ATT completion, HLA-DR, Ki-67 and GrB expression was significantly decreased, and relative IL-2 production was increased in peripheral Mtb-specific CD4 T cells. Overall, using an ex vivo assay to compare the immune response towards Mtb in PCF and in blood, we identified significant difference in the phenotypic profile of Mtb-specific CD4 T response between these two compartments. Moreover, we show that the activation profile of peripheral Mtb-specific CD4 T cells could be used to monitor treatment response in PCTB.
On a decoupled linear FEM integrator for Eddy-current-LLG
Creators: name: Le, Kim-Ngan
name: Page, Marcus
name: Praetorius, Dirk
name: Tran, Thanh
Publisher: name: arXiv
Year: 2013
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics
subject: 65M12, 65N30, 35K55

description: We propose a numerical integrator for the coupled system of the eddy-current equation with the nonlinear Landau-Lifshitz-Gilbert equation. The considered effective field contains a general field contribution, and we particularly cover exchange, anisotropy, applied field, and magnetic field (stemming from the eddy-current equation). Even though the considered problem is nonlinear, our scheme requires only the solution of two linear systems per time-step. Moreover, our algorithm decouples both equations so that in each time-step, one linear system is solved for the magnetization, and afterwards one linear system is solved for the magnetic field. Unconditional convergence -- at least of a subsequence -- towards a weak solution is proved, and our analysis even provides existence of such weak solutions. Numerical experiments with a micromagnetic benchmark problem underline the performance of the proposed algorithm.
description: 13 pages, 4 figures
Excited states in poly-diacetylene chains: A Density-matrix-renormalization-group study
Creators: name: Barcza, Gergely
name: Barford, William
name: Gebhard, Florian
name: Legeza, Örs
Publisher: name: arXiv
Year: 2013
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study theoretically poly-diacetylene chains diluted in their monomer matrix. We employ the density-matrix renormalization group method (DMRG) on finite chains to calculate the ground state and low-lying excitations of the corresponding Peierls--Hubbard-Ohno Hamiltonian which is characterized by the electron transfer amplitude t0 between nearest neighbors, by the electron-phonon coupling constant α, by the Hubbard interaction U, and by the long-range interaction V. We treat the lattice relaxation in the adiabatic limit, i.e., we calculate the polaronic lattice distortions for each excited state. Using chains with up to 102 lattice sites, we can safely perform the extrapolation to the thermodynamic limit for the ground-state energy and conformation, the single-particle gap, and the energies of the singlet exciton, the triplet ground state, and the optical excitation of the triplet ground state. The corresponding gaps are known with high precision from experiment. We determine a coherent parameter set (t0*=2.4 eV, α*=3.4 eV/Å, U*=6 eV, V*=3 eV) from a fit of the experimental gap energies to the theoretical values which we obtain for 81 parameter points in the four dimensional search space (t0, α, U, V). We identify dark in-gap states in the singlet and triplet sectors as seen in experiment. Using a fairly stiff spring constant, the length of our unit cell is about one percent larger than its experimental value.
description: 18 pages, 13 figures
On the correlation between the oxygen in hydrogen content and the catalytic activity of cathode catalysts in PEM water electrolysis
Creators: name: Martin, Agate
name: Trinke, Patrick
name: Van Pham, Chuyen
name: Bühler, Melanie
name: Bierling, Markus
name: Holzapfel, Peter K. R.
name: Bensmann, Boris
name: Thiele, Simon
name: Hanke-Rauschenbach, Richard
Publisher: name: Pennington, NJ : Electrochemical Society
Year: 2021
Subjects: subject: Carbon
subject: Catalyst activity
subject: Cathodes
subject: Electrocatalysts
subject: Electrolysis
subject: Electrolytic reduction
subject: Hydrogen
subject: Platinum
subject: Polarization
subject: Titanium compounds
subject: Carbon-based
subject: Cathode catalyst
subject: Hydrogen contents
subject: Metal free
subject: Oxygen reduction reaction
subject: PEM water electrolysis
subject: Platinum group metals
subject: Polarization behavior
subject: Porous transport layers
subject: Recombination activity
subject: Oxygen
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau
subject: Dewey Decimal Classification::600 | Technik::660 | Technische Chemie

description: Altogether five platinum group metal (PGM) and PGM-free cathode catalysts were investigated in full PEM water electrolysis cells regarding their polarisation behaviour and their hydrogen and oxygen recombination properties. It was shown that the recombination activity of permeated oxygen and evolved hydrogen within the cathodic catalyst layer correlates with the activity of the oxygen reduction reaction (ORR) which was determined ex situ with linear sweep voltammetry. We found that the investigated PGM-free cathode catalysts had a low activity for the ORR resulting in higher measurable oxygen in hydrogen volume fractions compared to the PGM catalysts, which are more active for the ORR. Out of the three investigated PGM-free catalysts, only one commercially available material based on a Ti suboxide showed a similar good polarisation behaviour as the state of the art cathode catalyst platinum, while its recombination activity was the lowest of all catalysts. In addition to the recombination of hydrogen and oxygen on the electrocatalysts, we found that the prevalent carbon-based cathodic porous transport layers (PTL) also offer catalytically active recombination sites. In comparison to an inactive PTL, the measurable oxygen flux using carbon-based PTLs was lower and the recombination was enhanced by microporous coatings with high surface areas. © 2021 The Author(s).
Eurekan faults on northern Ellesmere Island, Arctic Canada: from Cenozoic strike-slip tectonics to recent seismicity
Creators: name: Brandes, Christian
name: Piepjohn, Karsten
Publisher: name: Amsterdam [u.a.] : Elsevier Science
Year: 2021
Subjects: subject: Ellesmere Island
subject: Eurekan deformation
subject: paleostress analsysis
subject: Pearya Terrane
subject: strike-slip tectonics
subject: Dewey Decimal Classification::500 | Naturwissenschaften::550 | Geowissenschaften

description: The Eurekan deformation is a partially contractional Cenozoic tectonic event that affected large parts of the Arctic region. In the study area on northern Ellesmere Island, major NE-SW trending strike-slip faults occur, which are related to the Eurekan deformation. The outcrop data show that left-lateral strike-slip kinematics slightly dominate, but also right-lateral kinematics were documented. Cross-cutting relationships of the individual faults give evidence for multiple fault reactivations within major strike-slip zones. The reconstructed paleostress fields show two phases. The first phase started with a N-S compression and shifted over a NNE-SSW compression into a NNW-SSE compression. The second phase was a WNW-ESE compression. The paleostress field evolution reflects the movements of Greenland. During the Eurekan phase 1, Greenland moved northward and during Eurekan phase 2 it moved to the WNW. These motions likely controlled the stress field on northern Ellesmere Island. From the paleostress field analyses and the orientation of the strike-slip faults in the study area, it can be derived that the Eurekan phase 1 deformation is characterized by left-lateral strike-slip faults, whereas most-likely during Eurekan phase 2 the majority of right-lateral strike-slip faults formed. The paleostress field analysis implies that many Eurekan faults are reactivated Ellesmerian faults. Recent seismic events indicate ongoing tectonic activity at some of the major strike-slip faults. This sheds new light on the geodynamics of northern Ellesmere Island, which was mechanically coupled to the Greenland plate, and implies that under the recent stress field, earthquakes at strike-slip faults are still possible and some of these faults were active in at least three phases over the last 350 Myr.
Making the Relativistic Dynamics Equation Covariant: Explicit Solutions for Motion under a Constant Force
Creators: name: Friedman, Yaakov
name: Scarr, Tzvi
Publisher: name: arXiv
Year: 2012
Subjects: subject: General Physics (physics.gen-ph)
subject: FOS: Physical sciences

description: We derive a 4D covariant Relativistic Dynamics Equation. This equation canonically extends the 3D relativistic dynamics equation $\mathbf{F}=\frac{d\mathbf{p}}{dt}$, where $\mathbf{F}$ is the 3D force and $\mathbf{p}=m_0γ\mathbf{v}$ is the 3D relativistic momentum. The standard 4D equation $F=\frac{dp}{dτ}$ is only partially covariant. To achieve full Lorentz covariance, we replace the four-force $F$ by a rank 2 antisymmetric tensor acting on the four-velocity. By taking this tensor to be constant, we obtain a covariant definition of uniformly accelerated motion. This solves a problem of Einstein and Planck. We compute explicit solutions for uniformly accelerated motion. The solutions are divided into four Lorentz-invariant types: null, linear, rotational, and general. For null acceleration, the worldline is cubic in the time. Linear acceleration covariantly extends 1D hyperbolic motion, while rotational acceleration covariantly extends pure rotational motion.
description: 16 pages. arXiv admin note: substantial text overlap with arXiv:1105.0492
Hot thermal X-ray emission from the Be star HD119682
Creators: name: Torrejon, J. M.
name: Schulz, N. S.
name: Nowak, M. A.
name: Testa, P.
name: Rodes, J. J.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present an analysis of a series of four consecutive Chandra high resolution transmission gratings observations, amounting to a total of 150 ks, of the Be X-ray source HD119682 (= 1WGA J1346.5-6255), a member of the new class of gamma Cas analogs. The Chandra lightcurve shows significant brightness variations on timescales of hours. However, the spectral distribution appears rather stable within each observation and during the whole campaign. A detailed analysis is not able to detect any coherent pulsation up to a frequency of 0.05 Hz. The Chandra HETG spectrum seems to be devoid of any strong emission line, including Fe alpha fluorescence. The continuum is well described with the addition of two collisionally ionized plasmas of temperatures kT = 15 keV and 0.2 keV respectively, by the apec model. Models using photoionized plasma components (mekal) or non thermal components (powerlaw) give poorer fits, giving support to the pure thermal scenario. These two components are absorbed by a single column with N_H=(0.20^+0.15-0.03) x 10^22 cm^-2 compatible with the interstellar value. We conclude that HD119682 can be regarded as a pole-on gamma Cas analog.
description: Accepted for publication in ApJ (5 pages, 4 Figures)
title: Electroimmunoassay a New Competitive Protein Binding Assay Using Antibody Selective Electrodes
Creators: name: Connell, George Raymond
Publisher: name: Old Dominion University Libraries
Year: 1982

description: The purpose of this study was to utilize concept of antibody selective electrodes to develop a new competitive protein binding assay. This is a new concept and potentially important analytical technique because it combines the advantage of RIA (sensitivity and selectivity) with advantages of electrical assays (speed and low cost).
Impact of surface roughness on the turbulent wake flow of a turbine blade
Creators: name: Mulleners, Karen
name: Gilge, Philipp
name: Hohenstein, S.
Publisher: name: London : Hindawi Limited
Year: 2014
Subjects: subject: Wind tunnel
subject: Surface roughness
subject: Engineering
subject: Meteorology
subject: Turbulence
subject: Turbine blade
subject: Particle image velocimetry
subject: Turbine
subject: Friction loss
subject: Wake
subject: Geophysics
subject: FOS: Earth and related environmental sciences
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau

description: Roughened aeroengine blade surfaces lead to increased friction losses and reduced efficiency of the individual blades. The surface roughness also affects the wake flow of the blade and thus the inflow conditions for the subsequent compressor or turbine stage. To investigate the impact of surface roughness on a turbulent blade wake, we conducted velocity field measurements by means of stereo particle image velocimetry in the wake of a roughened turbine blade in a linear cascade wind tunnel. The turbine blade was roughened at different chordwise locations. The influence of the chordwise location of the added surface roughness was examined by comparing their impact on the width and depth of the wake and, the positions and distribution of vortical structures in the wake. Additionally, the friction loss coefficients for different surface roughness positions were estimated directly from the velocity field.
title: Correlation Between Glutathione Peroxidase Activity and Selenium Concentrations in Both Plasma and Erythrocytes
Creators: name: Munyanyi, Agatha Dudzai
Publisher: name: Old Dominion University Libraries
Year: 1981

description: Plasma and erythrocyte glutathione peroxidase activities and selenium concentrations were determined for 38 apparently healthy female subjects. In addition, erythrocyte lead and plasma lead and iron concentrations were determined in each subject.

Effects of age, smoking, vitamin and mineral supplementation, use of caffeinated beverages and oral contraceptives on glutathione peroxidase activity were determined and interelement relationships were investigated using the one tailed t-test and Spearman Rank Correlation Coefficients
Drop impact of shear thickening liquids
Creators: name: Boyer, Francois
name: Snoeijer, Jacco H.
name: Dijksman, J. Frits
name: Lohse, Detlef
Publisher: name: arXiv
Year: 2013
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: The impact of drops of concentrated non-Brownian suspensions (cornstarch and polystyrene spheres) onto a solid surface is investigated experimentally. The spreading dynamics and maxi- mal deformation of the droplet of such shear thickening liquids are found to be markedly different from the impact of Newtonian drops. A particularly striking observation is that the maximal de- formation is independent of the drop velocity and that the deformation suddenly stops during the impact phase. Both observations are due to the shear-thickening rheology of the suspensions, as is theoretically explained from a balance between the kinetic energy and the viscously-dissipated en- ergy, from which we establish a scaling relation between drop maximal deformation and rheological parameters of concentrated suspensions.
description: 5 pages, submitted to Phys. Rev. Lett
Berberis vulgaris
Creators: name: Becherer
Publisher: name: Zenodo
Year: 1956
Subjects: Biodiversity
Taxonomy

description: S.CucubalusWibel(S.vulgaris [Mönch]Garcke, S.inflata [Salisb.] Sm.,S',venosa[Gilib.] Ascherson) Ssp. vulgaris (Gaudin) Becherer (1934) (S.infl. ssp.vulgaris Gaudin, S.Cucubalus Wibels. str.) Cat. 44. Hohe Stellen, alle bei Zermatt: Fluhalp, Hütten,2610m,einExemplar (Becherer 1950);Oberrot- hörn,3050m (Braun-Blanquet1919);Gornergrat,3110m,steril (idem1919). Var. latifolia (Miller) - 3: La Liazim Val de Bagnes(P.); Zermatt (Christ). Var. angustifoUa (Miller) - 4: Blindental (B. C.W.). Var. pubescens (DC.) - l: Emaney (Oberson). - 3a: Gondo, f. parviflora Becherer (Becherer). Forma rubra (Ramond) - 3: Bidermatten im Saastal (Becherer). - 3a: Gondoschlucht zwischen der Alten Kaserne und Figenen (Becherer). Forma rosea (Bär) - 3: Ob Törbel (Stehler). Ssp. prostrata (Gaudin) Becherer (1934) (S.alpina [Lam.] Thomas, S.infl. ssp.prostrata Gaudin, * S. vulg. ssp. alpina Schinz et Keller) Cat. 44. 2: Ob Ayent (P.). - 3: Chermontane (J.); Val des Dix (J.); Alpe de Chäteaupre und Alpe deTor- rent im Val d'Anniviers (Melly); Höhbord östlich Saas-Grund (Hirschmann). - 4: Rappental (B.C.W.). Var. marginata (Kit.) Kunz- 2:Alp vonFully (Kunz) - 3:ObdemStellisee beiZermatt (Kunz).
description: Published as part of Becherer, 1956, Florae Vallesiacae Supplementum, pp. 1-556 in Denkschriften der Schweizerischen Naturforschenden Gesellschaft 71 on pages 1-556
title: Design of Efficient Algorithms Through Minimization of Data Transfers
Creators: name: Chong, Yong Mo
Publisher: name: Old Dominion University Libraries
Year: 1983

description: This thesis explores the time optimal implementation of computational graphs on a finite register machine. The implementation fully exploits the machine architecture, especially, the number of registers. The derived algorithms allow one to obtain time efficient implementations of a given graph in machines with a known number of registers.

These optimization procedures are applied to digital signal processing graphs. It is shown that the regular structure of these graphs allows one to identify computational kernels which, when used repeatedly, can cover the entire graph. The l- and r-register implementations of Hadamard and Fast Fourier Transforms using various computational kernels are studied for their code sizes and time complexities. The results obtained also allow one to select an optimal hardware devoted to a particular computational application
Investigation of droplet dynamics in a convective cloud using a Lagrangian cloud model
Creators: name: Lee, Junghwa
name: Noh, Yign
name: Raasch, Siegfried
name: Riechelmann, Theres
name: Wang, Lian-Ping
Publisher: name: Heidelberg : Springer
Year: 2014
Subjects: subject: large-eddy simulation
subject: turbulent collision-coalescence
subject: shallow convection
subject: cumulus clouds
subject: microphysics
subject: entrainment
subject: rain
subject: growth
subject: flow
subject: parameterization
subject: Dewey Decimal Classification::500 | Naturwissenschaften
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: A precipitating convective cloud is simulated successfully using the Lagrangian cloud model, in which the flow field is simulated by large eddy simulation and the droplets are treated as Lagrangian particles, and the results are analyzed to investigate precipitation initiation and to examine the parameterization of cloud microphysics. It is found that raindrops appear initially near the cloud top, in which strong turbulence and broadened droplet spectrum are induced by the entrainment of dry air, but high liquid-water mixing ratio is maintained within cloud parts because of insufficient mixing. Statistical analysis of the downward vertical velocity of a droplet W reveals that the transition from cloud droplets to raindrops occurs in the range 20 mu m < r < 100 mu m, while the variation of W depends on turbulence as well as the droplet radius r. The general pattern of the raindrop size distribution is found to be consistent with the Marshall-Palmer distribution. The precipitation flux can be underestimated substantially, if the terminal velocity is used instead of W, but it is not sensitive to the choice of the critical droplet radius dividing cloud drops and raindrops. It is also found that precipitation starts earlier and becomes stronger if the effect of turbulence is included in the collection kernel.
Laser sintering of copper conductive traces on primer pre-treated additive manufactured 3D surfaces
Creators: name: Olsen, Ejvind
name: Overmeyer, Ludger
Publisher: name: Philadelphia, PA : IOP Publishing
Year: 2021
Subjects: subject: 3D conductive traces
subject: additive manufacturing
subject: copper ink
subject: epoxy primer
subject: laser curing
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau::621 | Angewandte Physik::621,3 | Elektrotechnik, Elektronik

description: This paper introduces a novel process for creating conductive copper traces on 3D surfaces from different additive manufacturing technologies by employing printed electronics techniques. An essential step in this process was the dip-coating pre-treatment with a primer to reduce the surface roughness below 100 nm, seal pores if present, and increase the thermal stability. This was followed by a dip-coating with copper nanoparticle ink, drying using a heat gun and thermal curing by laser sintering. The experiments determined the optimal laser peak intensity for achieving conductors with the lowest electrical resistance possible. The laser parameters' processing window provided conductive traces on 3D surfaces with properties comparable to photonic sintering on planar substrates. Thereby, the conductive traces reached electrical specific resistances lower than 18 µΩ cm (elemental copper: ρ = 1.8 µΩ cm) and a copper material percentage higher than 90 atom %. Shear tests validated the assembly with surfacemount device (SMD) resistors. Electrical tests resulted in maximum current densities higher than 100 A mm-2 and lateral breakdown voltages higher than 2kV mm-1. Thus, this paper presents essential prerequisites for a future application of the technology.
PlaTe: Visually-Grounded Planning with Transformers in Procedural Tasks
Creators: name: Sun, Jiankai
name: Huang, De-An
name: Lu, Bo
name: Liu, Yun-Hui
name: Zhou, Bolei
name: Garg, Animesh
Publisher: name: arXiv
Year: 2021
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: In this work, we study the problem of how to leverage instructional videos to facilitate the understanding of human decision-making processes, focusing on training a model with the ability to plan a goal-directed procedure from real-world videos. Learning structured and plannable state and action spaces directly from unstructured videos is the key technical challenge of our task. There are two problems: first, the appearance gap between the training and validation datasets could be large for unstructured videos; second, these gaps lead to decision errors that compound over the steps. We address these limitations with Planning Transformer (PlaTe), which has the advantage of circumventing the compounding prediction errors that occur with single-step models during long model-based rollouts. Our method simultaneously learns the latent state and action information of assigned tasks and the representations of the decision-making process from human demonstrations. Experiments conducted on real-world instructional videos and an interactive environment show that our method can achieve a better performance in reaching the indicated goal than previous algorithms. We also validated the possibility of applying procedural tasks on a UR-5 platform. We make our code publicly available and support academic research purposes.
World cities and peripheral development: The interplay of gateways and subordinate places in Argentina and Ghana’s upstream oil and gas sector
Creators: name: Scholvin, Sören
Publisher: name: Oxford : Wiley-Blackwell
Year: 2021
Subjects: subject: Accra
subject: Argentina
subject: Buenos Aires [Federal District]
subject: Federal District [Argentina]
subject: Dewey Decimal Classification::300 | Sozialwissenschaften, Soziologie, Anthropologie
subject: Dewey Decimal Classification::300 | Sozialwissenschaften, Soziologie, Anthropologie::330 | Wirtschaft

description: Serving as “gateways”, some world cities tie their wider hinterlands to global networks. The article revisits gateway–hinterland relations against the backdrop of assessments that lead to opposed conclusions on the benefits and shortcomings of integration into the world economy. Referring to the oil and gas sector in Argentina and Ghana, it answers the question of how gateways interact with subordinate places and also uncovers obstacles to peripheral development. The author finds that Accra and Buenos Aires concentrate corporate control. Argentina's capital serves as a gateway for knowledge generation and logistics too. Opportunities for peripheral development in both countries are considerable, albeit largely limited to generic services. Besides a certain concentration of business activities in the gateway cities, more important challenges to peripheral development are typical for small and medium enterprises (insufficient finance and management capabilities, unawareness of business opportunities, and the like). They include rent seeking and subcontracting. The latter leaves local companies in a particularly weak position vis-à-vis lead firms. The author argues that while integration into the world economy allows for peripheral development, the corresponding outcomes may not meet everyone's expectations. Related expectations must, therefore, be more down-to-earth than overly optimistic statements frequently made by politicians.
Symmetry energy and nucleon-nucleon cross sections
Creators: name: Veselsky, Martin
name: Ma, Yu-Gang
Publisher: name: arXiv
Year: 2013
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The extension of the Boltzmann-Uehling-Uhlenbeck model of nucleus-nucleus collision is presented. The isospin-dependent nucleon-nucleon cross sections are estimated using the proper volume extracted from the equation of state of the nuclear matter transformed into the form of the Van der Waals equation of state. The results of such simulations demonstrate the dependence on symmetry energy which typically varies strongly from the results obtained using only the isospin-dependent mean-field. The evolution of the n/p multiplicity ratio with angle and kinetic energy, in combination with the elliptic flow of neutrons and protons, provides a suitable set of observables for determination of the density dependence of the symmetry energy. The model thus provides an environment for testing of equations of state, used for various applications in nuclear physics and astrophysics.
description: 20 pages, 9 figures, to appear in Physical Review C
First Demonstration of 6 dB Quantum Noise Reduction in a Kilometer Scale Gravitational Wave Observatory
Creators: name: Lough, James
name: Schreiber, Emil
name: Bergamin, Fabio
name: Grote, Hartmut
name: Mehmet, Moritz
name: Vahlbruch, Henning
name: Affeldt, Christoph
name: Brinkmann, Marc
name: Bisht, Aparna
name: Kringel, Volker
name: Lück, Harald
name: Mukund, Nikhil
name: Nadji, Severin
name: Sorazu, Borja
name: Strain, Kenneth
name: Weinert, Michael
name: Danzmann, Karsten
Publisher: name: College Park, Md. : APS
Year: 2021
Subjects: subject: Gravitational effects
subject: Gravity waves
subject: Interferometers
subject: Light sources
subject: Noise abatement
subject: Dewey Decimal Classification::500 | Naturwissenschaften::550 | Geowissenschaften
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: Photon shot noise, arising from the quantum-mechanical nature of the light, currently limits the sensitivity of all the gravitational wave observatories at frequencies above one kilohertz. We report a successful application of squeezed vacuum states of light at the GEO 600 observatory and demonstrate for the first time a reduction of quantum noise up to 6.03±0.02 dB in a kilometer scale interferometer. This is equivalent at high frequencies to increasing the laser power circulating in the interferometer by a factor of 4. Achieving this milestone, a key goal for the upgrades of the advanced detectors required a better understanding of the noise sources and losses and implementation of robust control schemes to mitigate their contributions. In particular, we address the optical losses from beam propagation, phase noise from the squeezing ellipse, and backscattered light from the squeezed light source. The expertise gained from this work carried out at GEO 600 provides insight toward the implementation of 10 dB of squeezing envisioned for third-generation gravitational wave detectors.