cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
A conceptual framework for the scale-specific stochastic modeling of transitions in tropical cyclone intensities
Creators: name: Bhalachandran, Saiprasanth
name: Rao, P. Suresh C.
name: Marks, Frank
Publisher: name: figshare
Year: 2019
Subjects: subject: Atmospheric Sciences
subject: FOS: Earth and related environmental sciences

description: This data is to accompany the article titled "A conceptual framework for the scale-specific stochastic modeling of transitions in tropical cyclone intensities" published in Earth and Space Science (AGU). It contains the codes, data sets pertinent to this manuscript and is freely available to the readers.
Cancelled routine vaccination appointments due to COVID-19 pandemic in Germany
Creators: name: Schmid-Küpke, Nora Katharina
name: Matysiak-Klose, Dorothea
name: Siedler, Anette
name: Felgendreff, Lisa
name: Wieler, Lothar
name: Thaiss, Heidrun M.
name: Betsch, Cornelia
Publisher: name: Robert Koch-Institut
Year: 2021
Subjects: subject: Routine vaccination
subject: Cancellations
subject: Pandemic
subject: Covid-19
subject: Germany
subject: Healthcare system
subject: 610 Medizin und Gesundheit

description: Pandemic measures to mitigate the outbreak of SARS-CoV-2 in Germany led to cancellations of routine vaccination appointments for both adults and children. Survey data indicate that, with easing pandemic restrictions, many cancelled appointments were rescheduled or caught up. Nevertheless, 40% of cancelled appointments were still not rescheduled and were primarily cancelled by patients. Therefore, doctors should regularly remind patients of vaccinations and use every visit to improve their vaccination statuses.
Resonance structures in the multichannel quantum defect theory for the photofragmentation processes involving one closed and many open channels
Creators: name: Lee, Chun-Woo
Publisher: name: arXiv
Year: 2002
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: The transformation introduced by Giusti-Suzor and Fano and extended by Lecomte and Ueda for the study of resonance structures in the multichannel quantum defect theory (MQDT) is used to reformulate MQDT into the forms having one-to-one correspondence with those in Fano's configuration mixing (CM) theory of resonance for the photofragmentation processes involving one closed and many open channels. The reformulation thus allows MQDT to have the full power of the CM theory, still keeping its own strengths such as the fundamental description of resonance phenomena without an assumption of the presence of a discrete state as in CM.
description: 7 pages
Coulomb blockade at a tunnel junction between two quantum wires with long-range interaction
Creators: name: Sassetti, Maura
name: Cuniberti, Gianaurelio
name: Kramer, Bernhard
Publisher: name: arXiv
Year: 1997
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The non-linear current-voltage characteristic of a tunnel junction between two Luttinger systems is calculated for an interaction with finite range. Coulomb blockade features are found. The dissipative resistance, the capacitance and the external impedance, which were introduced ad hoc in earlier theories, are obtained in terms of the electron-electron interaction. The frequency dependence of the impedance is given by the excitation spectrum of the electrons.
description: 5 pages, RevTeX, 2 figures, to be published in Solid State Communications
Sum rule for transport in a Luttinger liquid with long range interaction in the presence of an impurity
Creators: name: Cuniberti, Gianaurelio
name: Sassetti, Maura
name: Kramer, Bernhard
Publisher: name: arXiv
Year: 1997
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We show that the non-linear dc transport in a Luttinger liquid with interaction of finite range in the presence of an impurity is governed by a sum rule which causes the charging energy to vanish.
description: 5 pages, RevTeX, 1 figure, to be published in Europhysics Letters
Where do all the supercurvature modes go?
Creators: name: Cohn, J. D.
name: Kaiser, D. I.
Publisher: name: arXiv
Year: 1998
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: In the hyperbolic slicing of de Sitter space appropriate for open universe models, a curvature scale is present and supercurvature fluctuations are possible. In some cases, the expansion of a scalar field in the Bunch-Davies vacuum includes supercurvature modes, as shown by Sasaki, Tanaka and Yamamoto. We express the normalizable vacuum supercurvature modes for a massless scalar field in terms of the basis modes for the spatially-flat slicing of de Sitter space.
description: 23 pages, 3 .eps figures included, uses prd,aps, epsfig style files final version to appear in Phys Rev D, expanded concluding section
IT-Orientation-towards-Human-Being
Creators: name: Plochberger, Franz
Publisher: name: figshare
Year: 2019
Subjects: subject: 80602 Computer-Human Interaction
subject: FOS: Psychology

description: At the beginning of our Age of Information, the 21th century, the influence of IT (Information Technology) have got so important that all parts of human live and society have been involved. Especially Media Industry started a great hype which is not finished till now. Mobile Media have got a really up to date part of especially young society.

On the level of serious science it has been up to date to use the word Information in all reports and publishing papers. A lot of semantics have been used and some scientists (Prof. FLEISSNER, Prof HOFKIRCHNER, Prof. CAPURRO and the author) tried to abstract this word to a constant scientific term. So for first time the author tried a worldwide unifying definition of the terms Information and Data. It’s importance is documented by the topic “Information Scientific Axioms”.

In second part – based on it – Clues for generally evidence of Information are written down. They are a set of informationscientific terms - excerpted out of real nature and society. The way of Information between Object and Subject or involving Human Being in big and complex machine systems (aeroplanes, ships and industrial productions) made it necessary to think additionally about the general usage of Information. As a useful result many relationships to other sciences are possible. They bring the benefit to be unifying and scientifically worldwide structuring.

As next research object general forms of actual Information are investigated. As final result for future the author asks: „How can we make Information – in all forms – more positive and precious for Human Being? “. This is a new, scientific topic for the future of IT and human society.
title: Hydraulik in Traktoren und Landmaschinen
Creators: name: Guo, Jihao
name: Kossen, Hans
name: Neurath, Hagen
name: Ritters, Kerstin
name: Winkelhahn, Philipp
Publisher: name: Institut für Mobile Maschinen und Nutzfahrzeuge (IMN)
Year: 2018
Subjects: subject: Bedarfsstromsystem, Regelungskonzepte, Digitalhydraulik
subject: flow-on-demand, control concepts, digital hydraulic
subject: 63

description: Der branchenübergreifende Trend zu effizienteren Antriebssystemen lässt sich bereits seit
Jahren in der Hydraulik beobachten. Durch eine bessere Anpassung der im Antriebssystem
vorhandenen Komponenten gelingt es, in verschiedenen Anwendungen Effizienzvorteile zu
erzielen. Sowohl auf Komponenten- als auch auf Systemebene wird hierbei auf die Reglungstechnik
gesetzt, um Betriebsparameter bestmöglich einzustellen und prinzipbedingte
Verluste zu reduzieren.
description: The interdisciplinary trend towards more efficient drive systems can also be observed in hydraulic
drives. A higher efficiency in different applications is achieved by a better adaption of
parameters of drive components to the application. For both on the component and the system
level control engineering is used to adapt parameters in the best way to reduce power
losses.
description: Jahrbuch Agrartechnik, vol. 29Jahrbuch Agrartechnik 2017, vol. 29, 2017
Detecting Axion Dark Matter with Radio Lines from Neutron Star Populations
Creators: name: Safdi, Benjamin R.
name: Sun, Zhiquan
name: Chen, Alexander Y.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: It has been suggested that radio telescopes may be sensitive to axion dark matter that resonantly converts to radio photons in the magnetospheres surrounding neutron stars (NSs). In this work, we closely examine this possibility by calculating the radiated power from and projected sensitivity to axion dark matter conversion in ensembles of NSs within astrophysical systems like galaxies and globular clusters. We use population synthesis and evolution models to describe the spatial distributions of NSs within these systems and the distributions of NS properties. Focusing on three specific targets for illustration, the Galactic Center of the Milky Way, the globular cluster M54 in the Sagittarius dwarf galaxy, and the Andromeda galaxy, we show that narrow-band radio observations with telescopes such as the Green Bank Telescope and the future Square Kilometer Array may be able to probe the quantum chromodynamics axion over roughly two orders of magnitude in mass, starting at a fraction of a $μ$eV.
description: 27 pages, 15 figures
Procurement Price Level Acceptable to Both Farm Producers and Processors
Creators: name: Rembisz, Włodzimierz
name: Rembisz, Włodzimierz
Publisher: name: Unknown
Year: 2020
Subjects: subject: Agricultural and Food Policy
subject: Farm Management
subject: acceptable procurement price level
subject: acceptable inequalities
subject: farm producers’ goal function
subject: processors’ goal function

description: The aim of the paper is to demonstrate that for a given procurement price there is a certain equality accepting mutual benefits for both farm producers and agri-food processors. This allows transactions to be made at the procurement price level which is allowable and mutually acceptable due to the benefits. The benefits do not have to be equal, hence the concept of acceptable inequalities. The paper shows the basis for expecting the procurement price level, and therefore the benefits from the producer’s and processor’s point of view. They result from their maximised goal functions. Both parties are price-takers for the procurement price established on the purchase market, with a reference to price determination at the administrative level. The hypothesis about the acceptable inequality is proven in logical and formal analysis with the use of algebra notations and rules. By and large, this has not been addressed in the literature.
description: DOI: 10.30858/zer/124637
Quasi-Lagrangian Systems of Newton Equations
Creators: name: Rauch-Wojciechowski, Stefan
name: Marciniak, Krzysztof
name: Lundmark, Hans
Publisher: name: arXiv
Year: 1999
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: Systems of Newton equations of the form $\ddot{q}=-{1/2}A^{-1}(q)\nabla k$ with an integral of motion quadratic in velocities are studied. These equations generalize the potential case (when A=I, the identity matrix) and they admit a curious quasi-Lagrangian formulation which differs from the standard Lagrange equations by the plus sign between terms. A theory of such quasi-Lagrangian Newton (qLN) systems having two functionally independent integrals of motion is developed with focus on two-dimensional systems. Such systems admit a bi-Hamiltonian formulation and are proved to be completely integrable by embedding into five-dimensional integrable systems. They are characterized by a linear, second-order PDE which we call the fundamental equation. Fundamental equations are classified through linear pencils of matrices associated with qLN systems. The theory is illustrated by two classes of systems: separable potential systems and driven systems. New separation variables for driven systems are found. These variables are based on sets of non-confocal conics. An effective criterion for existence of a qLN formulation of a given system is formulated and applied to dynamical systems of the Henon-Heiles type.
description: 50 pages including 9 figures. Uses epsfig package. To appear in J. Math. Phys
Supplement for "Accumulation of Uremic Solutes in the Cerebrospinal Fluid in Experimental Acute Renal Failure"
Creators: name: Mair, Robert
Publisher: name: figshare
Year: 2019
Subjects: subject: 110312 Nephrology and Urology
subject: FOS: Clinical medicine

description: Supplementary Tables for paper "Accumulation of Uremic Solutes in the Cerebrospinal Fluid in Experimental Acute Renal Failure" authored by Robert Mair, Huy Nguyen, Ting-Ting Huang, Natalie Plummer, Tammy Sirich, and Tim Meyer accepted for publication in the American Journal of Physiology-Renal Physiology 2019
History-Dependence and Ageing in a Periodic Long-Range Josephson Array
Creators: name: Chandra, P.
name: Feigelman, M. V.
name: Ioffe, L. B.
name: Kagan, D. M.
Publisher: name: arXiv
Year: 1997
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: History-dependence and ageing are studied in the low-temperature glass phase of a long-range periodic Josephson array. This model is characterized by two parameters, the number of wires ($2N$) and the flux per unit strip ($α$); in the limit $N \to \infty$ and fixed $α\ll 1$ the dynamics of the model are described by the set of coupled integral equations, which coincide with those for the $p=4$ disordered spherical model. Below the glass transition we have solved these equations numerically in a number of different regimes. We observe power-law ageing after a fast quench with an exponent that decreases rapidly with temperature. After slow cooling to a not-too-low temperature, we see ageing characterized by the appearance of a new time scale which has a power law dependence on the cooling rate. By contrast if the array is cooled slowly to very low temperatures the ageing disappears. The physical consequences of these results in different cooling regimes are discussed for future experiment. We also study the structure of the phase space in the low temperature glassy regime. Analytically we expect an exponential number of metastable states just below the glass transition temperature with vanishing mutual overlap, and numerical results indicate that this scenario remains valid down to zero temperature. Thus in this array there is no further subdivision of metastable states. We also investigate the probability to evolve to different states given a starting overlap, and our results suggest a broad distribution of barriers.
description: 22 pages, LaTex, 17 PostScript Figures
The Area Spectrum in Quantum Gravity
Creators: name: Krasnov, Kirill
Publisher: name: arXiv
Year: 1998
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We show that, apart from the usual area operator of non-perturbative quantum gravity, there exists another, closely related, operator that measures areas of surfaces. Both corresponding classical expressions yield the area. Quantum mechanically, however, the spectra of the two operators are different, coinciding only in the limit when the spins labelling the state are large. We argue that both operators are legitimate quantum operators, and which one to use depends on the context of a physical problem of interest. Thus, for example, we argue that it is the operator proposed here that is relevant in the black hole context to measure the area of black hole horizon. We show that the difference between the two operators is due to non-commutativity that is known to arise in the quantum theory. We give a heuristic picture explaining the difference between the two area spectra in terms of quantum fluctuations of the surface whose area is being measured.
description: 8 pages, Revtex, no figures
Prediction of forming effects in UD-NCF by macroscopic forming simulation – Capabilities and limitations
Creators: name: Kärger, Luise
name: Galkin, Siegfried
name: Kunze, Eckart
name: Gude, Maik
name: Schäfer, Bastian
Publisher: name: ULiège Library
Year: 2021
Subjects: non-orthogonal material modelling
non-crimp fabrics
draping effects
gapping
waviness

description: Unidirectional non-crimp fabrics (UD-NCF) provide the highest lightweight potential among dry textile materials. Compared to multiaxial NCF, the fabric layers in UD-NCF enable a more targeted tailoring. Compared to woven fabrics, the fibres of UD-NCF are straight without weakening undulations. However, the formability of UD-NCF is more challenging compared to woven fabrics. The yarns are bonded by a stitching and the deformation behaviour highly depends on this stitching and on the slippage between the stitching and the fibre yarns. Moreover, distinct local draping effects occur, like gapping and fibre waviness, which can have a considerable impact on the mechanical performance. Such local effects are particularly challenging or even impossible to be predicted by macroscopic forming simulation. The present work applies a previously published macroscopic UD-NCF modelling approach to perform numerical forming analyses and evaluate the prediction accuracy of forming effects. In addition to fibre orientations and shear angles, as investigated in previous work, the present work also provides indication for fibre area ratios, gapping, transverse compaction and fibre waviness. Moreover, the prediction accuracy is validated by comparison with experimental tests, where full-field strains of inner plies are captured by prior application of dots onto the fibre yarns, by measuring them via radiography and applying a photogrammetry software. The modelling approach provides good prediction accuracy for fibre orientations, shear strains and fibre area ratio. Conversely, normal fibre strains, indicating fibre waviness, and transverse strains, indicating gapping, show some deviations due to the multiscale nature of UD-NCF that cannot be captured entirely on macroscopic scale.
Microscopic imaging of elastic deformation in diamond via in-situ stress tensor sensors
Creators: name: Broadway, D. A.
name: Johnson, B. C.
name: Barson, M. S. J.
name: Lillie, S. E.
name: Dontschuk, N.
name: McCloskey, D. J.
name: Tsai, A.
name: Teraji, T.
name: Simpson, D. A.
name: Stacey, A.
name: McCallum, J. C.
name: Bradby, J. E.
name: Doherty, M. W.
name: Hollenberg, L. C. L.
name: Tetienne, J. -P.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The precise measurement of mechanical stress at the nanoscale is of fundamental and technological importance. In principle, all six independent variables of the stress tensor, which describe the direction and magnitude of compression/tension and shear stress in a solid, can be exploited to tune or enhance the properties of materials and devices. However, existing techniques to probe the local stress are generally incapable of measuring the entire stress tensor. Here, we make use of an ensemble of atomic-sized in-situ strain sensors in diamond (nitrogen-vacancy defects) to achieve spatial mapping of the full stress tensor, with a sub-micrometer spatial resolution and a sensitivity of the order of 1 MPa (corresponding to a strain of less than $10^{-6}$). To illustrate the effectiveness and versatility of the technique, we apply it to a broad range of experimental situations, including mapping the elastic stress induced by localized implantation damage, nano-indents and scratches. In addition, we observe surprisingly large stress contributions from functional electronic devices fabricated on the diamond, and also demonstrate sensitivity to deformations of materials in contact with the diamond. Our technique could enable in-situ measurements of the mechanical response of diamond nanostructures under various stimuli, with potential applications in strain engineering for diamond-based quantum technologies and in nanomechanical sensing for on-chip mass spectroscopy.
description: 20 pages including SI
On a Schwarzian PDE associated with the KdV Hierarchy
Creators: name: Nijhoff, Frank
name: Hone, Andrew
name: Joshi, Nalini
Publisher: name: arXiv
Year: 1999
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: We present a novel integrable non-autonomous partial differential equation of the Schwarzian type, i.e. invariant under Möbius transformations, that is related to the Korteweg-de Vries hierarchy. In fact, this PDE can be considered as the generating equation for the entire hierarchy of Schwarzian KdV equations. We present its Lax pair, establish its connection with the SKdV hierarchy, its Miura relations to similar generating PDEs for the modified and regular KdV hierarchies and its Lagrangian structure. Finally we demonstrate that its similarity reductions lead to the {\it full} Painlevé VI equation, i.e. with four arbitary parameters.
description: 11 pages
Total angular momentum sorting in the telecom infrared with silicon Pancharatnam-Berry transformation optics
Creators: name: Ruffato, Gianluca
name: Capaldo, Pietro
name: Massari, Michele
name: Mafakheri, Erfan
name: Romanato, Filippo
Publisher: name: arXiv
Year: 2019
Subjects: subject: Optics (physics.optics)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: Parallel sorting of orbital angular momentum (OAM) and polarization has recently acquired paramount importance and interest in a wide range of fields ranging from telecommunications to high-dimensional quantum cryptography. Due to their inherently polarization-sensitive optical response, optical elements acting on the geometric phase prove to be useful for processing structured light beams with orthogonal polarization states by means of a single optical platform. In this work, we present the design, fabrication and test of a Pancharatnam-Berry optical element in silicon implementing a log-pol optical transformation at 1310 nm for the realization of an OAM sorter based on the conformal mapping between angular and linear momentum states. The metasurface is realized in the form of continuously-variant subwavelength gratings, providing high-resolution in the definition of the phase pattern. A hybrid device is fabricated assembling the metasurface for the geometric phase control with multi-level diffractive optics for the polarization-independent manipulation of the dynamic phase. The optical characterization confirms the capability to sort orbital angular momentum and circular polarization at the same time.
description: 15 pages, 10 figures
Food Quality on The Polish Market – Threats and Ways of Their Elimination
Creators: name: Kowalczyk, Stanisław
name: Kwasek, Mariola
name: Kowalczyk, Stanisław
name: Kwasek, Mariola
Publisher: name: Unknown
Year: 2020
Subjects: subject: Farm Management
subject: food quality
subject: food adulteration
subject: food quality schemes

description: The article is dedicated to the issue of food quality on the Polish market, identification of threats and ways to eliminate them. In the modern world, the issue of quality and related food safety is a matter of special concern for countries and international organizations. Lack of appropriate institutional solutions in the food market creates the risk of adverse effects on human health or life. Identification of risk areas throughout the food chain, i.e. from primary production through processing, storage, distribution, sale of food products to consumption, forms the basis for ensuring food safety. Based on the actual results of inspections of institutions established for official food supervision, the state of health and economic security (scale of irregularities and adulteration) of food on the domestic market was presented.
description: DOI: 10.30858/zer/125619
Diagonalization of system plus environment Hamiltonians
Creators: name: Kehrein, Stefan
name: Mielke, Andreas
Publisher: name: arXiv
Year: 1997
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: A new approach to dissipative quantum systems modelled by a system plus environment Hamiltonian is presented. Using a continuous sequence of infinitesimal unitary transformations the small quantum system is decoupled from its thermodynamically large environment. Dissipation enters through the observation that system observables generically decay completely into a different structure when the Hamiltonian is transformed into diagonal form. The method is particularly suited for studying low-temperature properties. This is demonstrated explicitly for the super-Ohmic spin-boson model.
description: 4 pages, Latex, uses Revtex
Energy-dependent 3-body loss in 1D Bose gases
Creators: name: Zundel, Laura A.
name: Wilson, Joshua M.
name: Malvania, Neel
name: Xia, Lin
name: Riou, Jean-Felix
name: Weiss, David S.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We study the loss of atoms in quantum Newton's cradles (QNCs) with a range of average energies and transverse confinements. We find that the three-body collision rate in one-dimension is strongly energy dependent, as predicted by a strictly 1D theory. We adapt the theory to atoms in waveguides, then using detailed momentum measurements to infer all the collisions that occur, we compare the observed loss to the adapted theory and find that they agree well.
Towards numerical prediction of flow-induced fiber displacements during wet compression molding (WCM)
Creators: name: Poppe, Christian
name: Albrecht, Fabian
name: Krauß, Constantin
name: Kärger, Luise
Publisher: name: ULiège Library
Year: 2021

description: Wet compression molding (WCM) provides large-scale production potential for continuous fiber-reinforced structural components due to simultaneous infiltration and draping during molding. Due to thickness-dominated infiltration of the laminate, comparatively low cavity pressures are sufficient – a considerable economic advantage. Experimental and numerical investigations prove strong mutual dependencies between the physical mechanisms, especially between resin flow (mold filling) and textile forming (draping), similar to other liquid molding techniques (LCM). Although these dependencies provide significant benefits such as improved contact, draping and infiltration capabilities, they may also lead to adverse effects such as flow-induced fiber displacement. To support WCM process and part development, process simulation requires a fully coupled approach including the capability to predict critical process effects. This work aims to demonstrate the suitability of a macroscopic, fully coupled, three-dimensional process simulation approach, to predict the process behavior during WCM, including flow-induced fiber displacements. The developed fluid model is superimposed to a suitable 3D forming model, which accounts for the deformation mechanisms including non-linear transverse compaction behavior. A strong Fluid-Structure-Interaction (FSI) enforced by Terzaghi’s law is applied to assess flow-induced fiber displacements during WCM within a porous UD-NCF stack in a homogenized manner. Accordingly, resulting local deformations are considered within the pressure field. All constitutive equations are formulated with respect to fiber deformation under finite strains. Results of a parametric study underline the relevance of contact conditions within the dry and infiltrated stack. The numerically predicted results are benchmarked and verified using both own and available experimental results from literature.
Planck 2018 and Brane Inflation Revisited
Creators: name: Kallosh, Renata
name: Linde, Andrei
name: Yamada, Yusuke
Publisher: name: arXiv
Year: 2018
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We revisit phenomenological as well as string-theoretical aspects of D-brane inflation cosmological models. Phenomenologically these models stand out on par with $α$-attractors, as models with Planck-compatible values of $n_s$, moving down to the sweet spot in the data with decreasing value of $r$. On the formal side we present a new supersymmetric version of these models in the context of de Sitter supergravity with a nilpotent multiplet and volume modulus stabilization. The geometry of the nilpotent multiplet is evaluated in the framework of string theory.
description: 29 pages, 8 figures
Scaling and Crossovers in Diffusion Limited Aggregation
Creators: name: Somfai, E.
name: Sander, L. M.
name: Ball, R. C.
Publisher: name: arXiv
Year: 1999
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: We discuss the scaling of characteristic lengths in diffusion limited aggregation (DLA) clusters in light of recent developments using conformal maps. We are led to the conjecture that the apparently anomalous scaling of lengths is due to one slow crossover. This is supported by an analytical argument for the scaling of the penetration depth of newly arrived random walkers, and by numerical evidence on the Laurent coefficients which uniquely determine each cluster. We find a single crossover exponent of -0.3 for all the characteristic lengths in DLA. This gives a hint about the structure of the renormalization group for this problem.
description: 4 pages, 3 figures
Dimensional crossover of the fundamental-measure functional for parallel hard cubes
Creators: name: Cuesta, Jose A.
name: Martinez-Raton, Yuri
Publisher: name: arXiv
Year: 1997
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: We present a regularization of the recently proposed fundamental-measure functional for a mixture of parallel hard cubes. The regularized functional is shown to have right dimensional crossovers to any smaller dimension, thus allowing to use it to study highly inhomogeneous phases (such as the solid phase). Furthermore, it is shown how the functional of the slightly more general model of parallel hard parallelepipeds can be obtained using the zero-dimensional functional as a generating functional. The multicomponent version of the latter system is also given, and it is suggested how to reformulate it as a restricted-orientation model for liquid crystals. Finally, the method is further extended to build a functional for a mixture of parallel hard cylinders.
description: 4 pages, no figures, uses revtex style files and multicol.sty, for a PostScript version see http://dulcinea.uc3m.es/users/cuesta/cross.ps
A Remark on the Deformation of GNS Representations of *-Algebras
Creators: name: Waldmann, Stefan
Publisher: name: arXiv
Year: 2000
Subjects: subject: Quantum Algebra (math.QA)
subject: Mathematical Physics (math-ph)
subject: Symplectic Geometry (math.SG)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: Motivated by deformation quantization we investigate the algebraic GNS construction of *-representations of deformed *-algebras over ordered rings and compute their classical limit. The question if a GNS representation can be deformed leads to the deformation of positive linear functionals. Various physical examples from deformation quantization like the Bargmann-Fock and the Schr{ö}dinger representation as well as KMS functionals are discussed.
description: LaTeX2e, 8 pages
Particle production from nonlocal gravitational effective action
Creators: name: Dobado, Antonio
name: Maroto, Antonio L.
Publisher: name: arXiv
Year: 1998
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this paper we show how the nonlocal effective action for gravity, obtained after integrating out the matter fields, can be used to compute particle production and spectra for different space-time metrics. Applying this technique to several examples, we find that the perturbative calculation of the effective action up to second order in curvatures yields exactly the same results for the total number of particles as the Bogolyubov transformations method, in the case of masless scalar fields propagating in a Robertson-Walker space-time. Using an adiabatic approximation we also obtain the corresponding spectra and compare the results with the traditional WKB approximation.
description: 22 pages, LaTeX, no figures. Corrected version with new comments and results. To appear in Phys. Rev. D
Fractals and Scars on a Compact Octagon
Creators: name: Levin, Janna
name: Barrow, John D.
Publisher: name: arXiv
Year: 1999
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: A finite universe naturally supports chaotic classical motion. An ordered fractal emerges from the chaotic dynamics which we characterize in full for a compact 2-dimensional octagon. In the classical to quantum transition, the underlying fractal can persist in the form of scars, ridges of enhanced amplitude in the semiclassical wave function. Although the scarring is weak on the octagon, we suggest possible subtle implications of fractals and scars in a finite universe.
description: 6 pages, 3 figs, LaTeX file
The Vocabulary of Introductory Physics and its Implications for Learning Physics
Creators: name: Itza-Ortiz, S.
name: Rebello, N. S.
name: Zollman, D.
name: Rodriguez-Achach, M.
Publisher: name: arXiv
Year: 2002
Subjects: subject: Physics Education (physics.ed-ph)
subject: FOS: Physical sciences

description: We investigate studnets' use of words used in everyday language as well as in physics. We find students are more likely to identify and explain the meaning of the word as it is used in physics when they have become familiar with the associated physical variables.
description: 6 pages, 2 figures and 2 tables, Resubmission to The Physics Teacher
Potential and challenges of a solid-shell element for the macroscopic forming simulation of engineering textiles
Creators: name: Schäfer, Bastian
name: Dörr, Dominik
name: Kärger, Luise
Publisher: name: ULiège Library
Year: 2021
Subjects: Solid-Shell
Forming
Process Simulation
Finite Element Analysis

description: Finite element (FE) forming simulation offers the possibility of a detailed analysis of the deformation behaviour of engineering textiles during forming processes, to predict possible manufacturing effects such as wrinkling or local changes in fibre volume content. The majority of macroscopic simulations are based on conventional two-dimensional shell elements with large aspect ratios to model the membrane and bending behaviour of thin fabrics efficiently. However, a three-dimensional element approach is necessary to account for stresses and strains in thickness direction accurately, which is required for processes with a significant influence of the fabric’s compaction behaviour, e.g. wet compression moulding. Conventional linear 3D-solid elements that would be commercially available for this purpose are rarely suitable for high aspect ratio forming simulations. They are often subjected to several locking phenomena under bending deformation, which leads to a strong dependence of the element formulation on the forming behaviour [1]. Therefore, in the present work a 3D hexahedral solid-shell element, based on the initial work of Schwarze and Reese [2,3], which has shown promising results for the forming of thin isotropic materials [1], is extended for highly anisotropic materials. The advantages of a locking-free element formulation are shown through a comparison to commercially available solid and shell elements in forming simulations of a generic geometry. Additionally, first ideas for an approach of a membrane-bending-decoupling based on a Taylor approximation of the strain are discussed, which is necessary for an accurate description of the deformation behaviour of thin fabrics.
Survey: Using AAL to support people with dementia
Creators: name: Manuel, Jose Gines Gimenez
Publisher: name: Middlesex University
Year: 2019
Subjects: subject: 100204 Environmental Biotechnology Diagnostics (incl. Biosensors)
subject: FOS: Environmental biotechnology
subject: 80602 Computer-Human Interaction
subject: FOS: Psychology

description: Link to the survey provided below explains the research and related ethical concerns. It is completely anonymous. Clicking the link does not implies you have to fill the survey up if you do not agree with it so you can cancel it at any time.
https://docs.google.com/forms/d/e/1FAIpQLSdZjxpomFtsWD5szLkTqiwJCF7k4D_oSmshthqSKcLaUtnd4w/viewform?usp=sf_link 
Marketplace Trade in Poland. State in 2008-2018 and Prospects
Creators: name: Świetlik, Krystyna
name: Świetlik, Krystyna
Publisher: name: Unknown
Year: 2020
Subjects: subject: Food Consumption/Nutrition/Food Safety
subject: Food Security and Poverty
subject: food
subject: retail trade
subject: food supply chains
subject: direct sales
subject: marketplace

description: In Poland, marketplace trade has a long tradition. There are interesting trends in its development. This form of trade was intensified substantially in the first years of the systemic transformation. A significant increase in the number of marketplaces was also observed in 2000-2008. However, the role of the marketplace in the retail trade sector has declined since 2008. The aim of this paper is to illustrate changes in trading at street markets in2008-2018, identify the main factors influencing their development and pinpoint those which will be significant in future. The sources include secondary data of the Polish Central Statistical Office (GUS) from the Local Data Bank (BDL), internal market statistics, direct research results, reports from various analytical institutions and agencies and available literature. The analysis of the data showed that the number of street markets in Poland declined by 1240 during 2008-2018, including 105 permanent markets and 1135 seasonal ones. The main reason for this change was the growth of discount stores and changes in customer preferences. Government programmes aimed at revitalising street markets and legal regulations facilitating the direct sale of food produced by farmers have not reversed this trend. The observed significant increase in consumer interest in unprocessed food which is safe for human health, which might be linked to the coronavirus pandemic, could result in a revival of street markets.
description: DOI: 10.30858/zer/125826
Blockchain based secure data handover scheme in non-orthogonal multiple access
Creators: name: Islam, Anik
name: Uddin, Mohammed Belal
name: Kader, Md. Fazlul
name: Shin, Soo Young
Publisher: name: arXiv
Year: 2018
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: Non-orthogonal multiple access (NOMA) with successive interference cancellation receiver is considered as one of the most potent multiple access techniques to be adopted in future wireless communication networks. Data security in the NOMA transmission scheme is on much attention drawing issue. Blockchain is a distributed peer-to-peer network enables a way of protecting information from unauthorized access, tempering etc. By utilizing encryption techniques of blockchain, a secured data communication scheme using blockchain in NOMA is proposed in this paper. A two-phase encryption technique with key generation using different parameter is proposed. In the first-phase data is encrypted by imposing users' public key and in the second phase, a private key of the base station (BS) is engaged for encryption. Finally, the superiority of the proposed scheme over existing scheme is proven through a comparative study based on the different features.
description: Published in 2018 4th International Conference on Wireless and Telematics (ICWT)
Square root singularity in the viscosity of neutral colloidal suspensions at large frequencies
Creators: name: Verberg, R.
name: de Schepper, I. M.
name: Feigenbaum, M. J.
name: Cohen, E. G. D.
Publisher: name: arXiv
Year: 1997
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: The asymptotic frequency $ω$, dependence of the dynamic viscosity of neutral hard sphere colloidal suspensions is shown to be of the form $η_0 A(ϕ) (ωτ_P)^{-1/2}$, where $A(ϕ)$ has been determined as a function of the volume fraction $ϕ$, for all concentrations in the fluid range, $η_0$ is the solvent viscosity and $τ_P$ the Péclet time. For a soft potential it is shown that, to leading order steepness, the asymptotic behavior is the same as that for the hard sphere potential and a condition for the cross-over behavior to $1/ωτ_P$ is given. Our result for the hard sphere potential generalizes a result of Cichocki and Felderhof obtained at low concentrations and agrees well with the experiments of van der Werff et al, if the usual Stokes-Einstein diffusion coefficient $D_0$ in the Smoluchowski operator is consistently replaced by the short-time self diffusion coefficient $D_s(ϕ)$ for non-dilute colloidal suspensions.
description: 18 pages LaTeX, 1 postscript figure
Deep neural networks as surrogate models for time-efficient manufacturing process optimisation
Creators: name: Zimmerling, Clemens
name: Schindler, Patrick
name: Seuffert, Julian
name: Kärger, Luise
Publisher: name: ULiège Library
Year: 2021
Subjects: Neural Networks
Deep Learning
Machine Learning
Optimisation
Surrogate
Draping
Textile forming
Manufacturing
Production

description: Manufacturing process optimisation usually amounts to searching optima in high-dimensional parameter spaces. In industrial practice, this search is most often directed by human-subjective expert judgment and trial-and-error experiments. In contrast, high-fidelity simulation models in combination with general-purpose optimisation algorithms, e.g. finite element models and evolutionary algorithms, enable a methodological, virtual process exploration and optimisation. However, reliable process models generally entail significant computation times, which often renders classical, iterative optimisation impracticable. Thus, efficiency is a key factor in optimisation. One option to increase efficiency is surrogate-based optimisation (SBO): SBO seeks to reduce the overall computational load by constructing a numerically inexpensive, data-driven approximation („surrogate“) of the expensive simulation. Traditionally, classical regression techniques are applied for surrogate construction. However, they typically predict a predefined, scalar performance metric only, which limits the amount of usable information gained from simulations. The advent of machine learning (ML) techniques introduces additional options for surrogates: in this work, a deep neural network (DNN) is trained to predict the full strain field instead of a single scalar during textile forming („draping“). Results reveal an improved predictive accuracy as more process-relevant information from the supplied simulations can be extracted. Application of the DNN in an SBO-framework for blank holder optimisation shows improved convergence compared to classical evolutionary algorithms. Thus, DNNs are a promising option for future surrogates in SBO.
Model Analysis: Assessing the dynamics of student learning
Creators: name: Bao, Lei
name: Redish, Edward F.
Publisher: name: arXiv
Year: 2002
Subjects: subject: Physics Education (physics.ed-ph)
subject: FOS: Physical sciences

description: In this paper we present a method of modeling and analysis that permits the extraction and quantitative display of detailed information about the effects of instruction on a class's knowledge. The method relies on a congitive model that represents student thinking in terms of mental models. Students frequently fail to recognize relevant conditions that lead to appropriate uses of their models. As a result they can use multiple models inconsistently. Once the most common mental models have been determined by qualitative research, they can be mapping onto a multiple choice test. Model analysis permits the interpretation of such a situation. We illustrate the use of our method by analyzing results from the FCI.
description: 25 pages, submitted to Cognition and Instruction, March 2001
Unphysical properties of the static quark-antiquark four-point correlator in Landau gauge
Creators: name: Greensite, Jeff
name: Owen, Evan
Publisher: name: arXiv
Year: 2018
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We consider the four point connected correlator representing a static quark-antiquark pair separated by a spatial distance R, propagating for a Euclidean time T. This function is computed by lattice Monte Carlo in SU(2) pure gauge theory at lattice couplings $β=2.2$ and $β=2.5$ in both Coulomb and Landau gauges. The Coulomb gauge correlator is well behaved, and is dominated at large T by a state whose energy grows linearly as $σR$, with $σ$ the known asymptotic string tension. The connected correlator in Landau gauge behaves differently. At intermediate R there is clear evidence of a linear potential, but the corresponding string tension extrapolates to zero at large T. At large R the connected correlator becomes negative; moreover there are strong finite size effects. These numerical results suggest that unphysical states dominate the large Euclidean time behavior of this Landau gauge correlator.
description: 6 pages, 10 figures
Die Schweizer Gastvorlesungen vom 7. bis 9. Mai 1956 in der Universität München; [1956]
Creators: name: Schmid, Karl
name: Nissen, Rudolf
Publisher: name: Universitätsbibliothek der Ludwig-Maximilians-Universität München
Year: 2015

description: Enth. u.a.: Fachstudium und allgemeine Bildung / Prof. Dr. K. Schmid. Anpassung und Ausgleich im menschlichen Organismus / von R. Nissen
description: Umschlagtitel
title: Bewässerungs- und Beregnungstechnik
Creators: name: Fricke...
name: Meyer...
name: Eberhard...
Publisher: name: Universitätsbibliothek Braunschweig
Year: 2018
Subjects: subject: 63

description: Jahrbuch Agrartechnik, vol. 29Jahrbuch Agrartechnik 2017, vol. 29, 2017
Experimental investigation of partially entangled states for device-independent randomness generation and self-testing protocols
Creators: name: Gómez, S.
name: Mattar, A.
name: Machuca, I.
name: Gómez, E. S.
name: Cavalcanti, D.
name: Farías, O. Jiménez
name: Acín, A.
name: Lima, G.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Previous theoretical works showed that all pure two-qubit entangled states can generate one bit of local randomness and can be self-tested through the violation of proper Bell inequalities. We report an experiment in which nearly pure partially entangled states of photonic qubits are produced to investigate these tasks in a practical scenario. We show that small deviations from the ideal situation make low entangled states impractical to self-testing and randomness generation using the available techniques. Our results show that in practice lower entanglement implies lower randomness generation, recovering the intuition that maximally entangled states are better candidates for deviceindependent quantum information processing.
description: 7 pags, 5 figs. Accepted by PRA