cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Konzeptionierung und Erprobung von dezentralen Frequenzhaltungsmaßnahmen und leistungsflussorientierten Lastabwurfverfahren im Verteilnetz
Creators: name: Albrecht, Marvin
Publisher: name: TU Dortmund
Year: 2021
Subjects: subject: Frequenzstabilität
subject: Energiespeichersysteme
subject: Lastabwurf
subject: Verteilnetz
subject: 620
subject: Energiespeicherung
subject: Frequenzstabilität

description: Aufgrund der erhöhten Integration dezentraler Energieerzeugungsanlagen in Verteilnetzen und der Abschaltung konventioneller Kraftwerke ändern sich die bisherigen Netzstrukturen grundlegend. In diesem Kontext müssen dezentrale Anlagen in Zukunft zwingend Systemdienstleistungen übernehmen. Eine besondere Rolle spielen hierbei die Bereitstellung von Primärregelleistung, insbesondere durch Batteriespeichersysteme, aber auch innovative unterfrequenzabhängige Lastabwurfkonzepte, welche sicherstellen, dass ebendiese dezentralen Anlagen nicht vom Netz getrennt werden. In dieser Arbeit wird untersucht, inwieweit umrichter-basierte dezentrale Anlagen über möglichst bestehende Kommunikationsinfrastrukturen, wie Smart Metering Systeme, geregelt werden können. Zudem wird ein selektives Lastabwurfkonzept entwickelt, welches sicherstellt, dass Last optimal abgeworfen wird. Durch dynamische Simulationsrechnungen wird untersucht, inwieweit die vorgestellten Konzepte die Netzfrequenz in kritischen Situationen effektiv stützen können. Abgerundet wird diese Arbeit mit der Entwicklung von Prototypen eines Speichercontrollers zur dezentralen Regelleistungsbereitstellung und eines selektiven Unterfrequenzrelais, welche nicht nur in Laborversuchen, sondern auch im Rahmen eines mehrmonatigen Feldversuchs in einem deutschen Verteilnetz getestet wurden.
description: The increased integration of decentralized energy recourses in distribution grids and the shutdown of conventional power plants are fundamentally changing existing grid structures. In this context, these generation units must provide ancillary services in the future. Especially, the provision of primary control power, in particular by battery storage systems, must be analysed. Furthermore, to ensure that these generators, connected to the distribution grid, are not disconnected during load shedding, innovative load shedding schemes must be defined. The present work investigates to which extent inverter-based distributed systems can be controlled via existing communication infrastructures, such as smart metering systems. Additionally, a selective load shedding scheme which ensures optimal load shedding processes has been developed. Dynamic simulations are used to investigate the effectiveness of the new defined concepts to support the grid frequency in critical situations. As a completion, developed prototypes of a storage controller to ensure the provision of decentralized control power of storages as well as an underfrequency relay have been tested not only in laboratory experiments but also in field tests in a German distribution network.
The topological-crystalline-insulator (Pb,Sn)Te - surface states and their spin-polarization
Creators: name: Safaei, S.
name: Kacman, P.
name: Buczko, R.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Using a tight-binding approach we study theoretically the nature of surface states in Pb0.4Sn0.6Te - the newly discovered topological-crystalline-insulator. Apart from the studied before (001) surface states, two other surface families, {011} and {111}, in which the mirror symmetry of the crystal's rock-salt structure plays the same role in topological protection, are considered. Our calculations show that while in (111) surface states of (Pb,Sn)Te four single topologically protected Dirac-cones should appear, for the (110) surface states the protection is lifted for two L points. In this case, instead of the Dirac points energy gaps occur in the surface states, due to the interaction between the two L valleys. In all studied cases a chiral spin texture is obtained.
description: 8 pages, 7 figures, submitted to Phys. Rev. B
Spin Resolution and Evidence for Superexchange on NiO(001) observed by Force Microscopy
Creators: name: Pielmeier, Florian
name: Giessibl, Franz J.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The spin order of the nickel oxide (001) surface is resolved, employing non-contact atomic force microscopy at 4.4 K using bulk Fe- and SmCo-tips mounted on a qPlus sensor that oscillates at sub-50 pm amplitudes. The spin-dependent signal is hardly detectable with Fe-tips. In contrast, SmCo-tips yield a height contrast of 1.35 pm for Ni ions with opposite spins. SmCo tips even show a small height contrast on the O atoms of 0.5 pm within the 2x1 spin unit cell, pointing to the observation of superexchange. We attribute this to the increased magnetocrystalline anisotropy energy of SmCo, which stabilizes the magnetic moment at the apex. Atomic force spectroscopy on the Ni up, Ni down and O lattice site reveals a magnitude of the exchange energy of merely 1 meV at the closest accessible distance with an exponential decay length of λ_exc = 18 pm.
description: 5 pages, 3 figures
Analysis of high latitude ULF waves and HF radar performance for African equatorial latitude SuperDARN
Creators: name: Michael, Chizurumoke
Publisher: name: University of Leicester
Year: 2021
Subjects: Uncategorized

description: This thesis studies the phase evolution in ultra low frequency (ULF) waves driven by substorm-injected energetic particles drifting azimuthally around the Earth using measurements from a Super Dual Auroral Radar Network (SuperDARN) radar at high latitude. The characterisation of a case-study Pc5 ULF wave event observed by the Hankasalmi SuperDARN radar suggests an equatorward latitudinal and eastward longitudinal phase propagation with an effective azimuthal wave number of 17 ± 1, in the intermediate range of those observed in ULF waves. This wave, also detected in nearby magnetometer datasets, has been interpreted as resulting from drifting electrons of energies of 35 ± 5 keV in a drift resonance condition linked to particle populations from a magnetospheric substorm. The latitudinal phase characteristics of this wave experienced temporal evolution. Statistical analysis of 18 similar ULF wave events also linked to substorminjected particles suggested that the phase evolution in the case-study is caused by additional injected particle populations associated with the same substorm driving the wave. This resulted in an observed backscatter "bite-out". This analysis enhances our current understanding of this species of ULF waves.The thesis also presents the predicted performance of such SuperDARN radars at African equatorial latitudes where they do not currently exist. A high frequency ray tracing simulation using realistic ionospheres and magnetic field geometries indicates that the eastwest azimuth (~ 25° range) has a significant likelihood of achieving SuperDARN-type backscatter in this sector. This is mainly due to the magnetic field geometry, as these azimuths allow the HF waves to propagate orthogonal to the geomagnetic field in the ionospheric region where irregularities are expected. These results are central to the planning of a SuperDARN-style radar for studying the equatorial ionosphere, for instance, in determining the radar characteristics such as operating frequencies, antenna boresight and azimuth coverage.
Deconstructing (2,0) Proposals
Creators: name: Lambert, N.
name: Papageorgakis, C.
name: Schmidt-Sommerfeld, M.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We examine the relationships between three proposals for the six-dimensional (2,0) theory: the DLCQ of hep-th/9707079, hep-th/9712117, the deconstruction prescription of hep-th/0110146, and the five-dimensional maximally supersymmetric Yang-Mills proposal of 1012.2880, 1012.2882. We show that hep-th/0110146 gives a deconstruction of five-dimensional maximally supersymmetric Yang-Mills. The proposal of hep-th/9707079, hep-th/9712117 uses a subset of the degrees of freedom of five-dimensional Yang-Mills and we show that compactification of it on a circle of finite radius agrees with the DLCQ arising from the proposal of 1012.2880, 1012.2882 or from the deconstruction proposal of hep-th/0110146.
description: 29 pages, Latex; v2: substantial rewording and additional explanations
Beziehungskisten und Bettgeschichten - Sexualität bei Martial in der Oberstufe
Creators: name: Wenzel, Michael
Publisher: name: Pegasus-Onlinezeitschrift
Year: 2017

description: Sexualität und Erotik spiegeln in ihren Formen und Spielarten ein Stück Kultur- und Sittengeschichte wider. Sie sind weitgehend vom Zeitgeist, vom jeweiligen Freiheitsbegriff und dem Verhältnis zu Religion, Moral und Körper abhängig. Michael Wenzel zeigt, wie anhand dreier Epigramme Martials (II 80, VI 91, XII 16), in denen der scharfzüngige Spötter ebenso geistreich wie anzüglich das Sexualleben seiner Zeitgenossen aufs Korn nimmt, den Schülern auf verblüffend unterhaltsame Weise Einblicke in die römische Gesellschaft und in ihre Werte vermittelt werden können.
description: Pegasus-Onlinezeitschrift, Bd. 6, Nr. 2+3 (2006): Pegasus-Onlinezeitschrift
Totus mundus agit histrionem. Maskenmenschen bei Martial und Robert Gernhardt
Creators: name: Lobe, Michael
Publisher: name: Pegasus-Onlinezeitschrift
Year: 2017

description: Ausgehend vom modernen medizinisch-soziologischen Befund des Gegenwartsmenschen als histrionischen Sozialcharakters werden an Martials Epigramm 3, 43 und einem zeitgenössischen Cartoon des deutschen Dichters und Malers Robert Gernhardt Maskenmenschen vorgeführt. Ein Vergleich beider fast zwei Jahrtausende auseinanderliegenden Texte zeigt bemerkenswerte Parallelen zwischen dem antiken und zeitgenössischen Satiriker auf. Nicht zuletzt versteht sich der Beitrag als Hommage an den am 30.06.2006 verstorbenen Robert Gernhardt.
description: Pegasus-Onlinezeitschrift, Bd. 6, Nr. 2+3 (2006): Pegasus-Onlinezeitschrift
Grübler, Schwätzer, Scharlatane — das Bild des Intellektuellen bei Lukian
Creators: name: Möllendorff, Peter Von
Publisher: name: Pegasus-Onlinezeitschrift
Year: 2017

description: „Intellektuelle Bildung (...) und die Frage, wie man sie erwirbt und wie man sie zu leben hat“ sind zentrale Themen im Œuvre des Syrers Lukian aus Kommagene (ca. 120 bis nach 180 n. Chr.), denen sich der Beitrag von Peter von Möllendorff widmet. Denn Bildung wird „seit dem ersten vorchristlichen Jahrhundert zunehmend zu einem Statussymbol der griechischsprachigen lokalen Oberschichten, ermöglicht neben dem Vermögen politischen Einfluss und – bis hin zum Kaiserhof - Autorität. Doch führt der Bildungsehrgeiz auch zu heftigster Konkurrenz der Intellektuellen und es erstaunt nicht, „dass Bildung bisweilen nur vorgetäuscht wird und dass sich die wirklich Gebildeten um die Entlarvung solcher Scharlatane bemühen“, etwa auch von Lukian in satirischer Form. Anhand ausgewählter Textbeispiele geht Peter von Möllendorff der Frage nach, „was denn aus der Sicht dieses eminenten Intellektuellen zum Bildungsstandard seiner Zeit gehört, wie man bloße Bildungsprätention enttarnt und auf wie viele verschiedene Weisen ein nicht wirklich Gebildeter sich in jener Zeit blamieren kann.“
description: Pegasus-Onlinezeitschrift, Bd. 7, Nr. 1 (2007): Pegasus-Onlinezeitschrift
The downwash distribution behind a delta wing at supersonic speeds
Creators: name: Palmer, George M.
Publisher: name: California Institute of Technology
Year: 1948
Subjects: Aeronautics

description: At the present date, very little information exists as to the downwash and sidewash in the wake of lifting surfaces for supersonic missiles and airplanes.  To the author's knowledge, Reference 1 is the first paper to develop the theory and carry out numerical calculations for the downwash and sidewash behind wings of practical interest.  However, the paper only contained brief indications of how to treat the very interesting triangular planform known as the delta wing.

It is the purpose of this paper to extend the basic idea for the determination of downwash as used in Reference 1, to the delta wing, and to carry out numerical calculations for a specific case.  Although it is possible to develop expressions for the downwash and the sidewash at all points within the Mach cone and in the wake of the wing, see Reference 1, it was not carried out here.  This paper applies only to the downwash field in the plane of the wing.  Another restriction is that the delta wing half angle be less than the Mach angle.
Distribution of Entropy Production in a Single-Electron Box
Creators: name: Koski, J. V.
name: Sagawa, T.
name: Saira, O. -P.
name: Yoon, Y.
name: Kutvonen, A.
name: Solinas, P.
name: Möttönen, M.
name: Ala-Nissila, T.
name: Pekola, J. P.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Recently, the fundamental laws of thermodynamics have been reconsidered for small systems. The discovery of the fluctuation relations has spurred theoretical and experimental studies on thermodynamics of systems with few degrees of freedom. The concept of entropy production has been extended to the microscopic level by considering stochastic trajectories of a system coupled to a heat bath. However, the experimental observation of the microscopic entropy production remains elusive. We measure distributions of the microscopic entropy production in a single-electron box consisting of two islands with a tunnel junction. The islands are coupled to separate heat baths at different temperatures, maintaining a steady thermal non-equilibrium. As Jarzynski equality between work and free energy is not applicable in this case, the entropy production becomes the relevant parameter. We verify experimentally that the integral and detailed fluctuation relations are satisfied. Furthermore, the coarse-grained entropy production from trajectories of electronic transitions is related to the bare entropy production by a universal formula. Our results reveal the fundamental roles of irreversible entropy production in non-equilibrium small systems.
Übersetzen ohne Verrat?
Creators: name: Stratenwerth, Dietrich
Publisher: name: Pegasus-Onlinezeitschrift
Year: 2017

description: Zentraler Bestandteil des Griechisch- und Lateinunterrichts ist das Übersetzen. In seinem Beitrag „Übersetzen ohne Verrat?“ (nach dem italienischen Wortspiel Traduttore – Traditore) beschäftigt sich Dietrich Stratenwerth mit der Problematik der Übersetzung und verdeutlicht dies, auch für Schüler gut nachvollziehbar, anhand zweier zentraler Beispiele aus der antiken Literatur: Für das Griechische hat Kallimachos’ Epigramm 61 Asper (62 Pf.) und für das Lateinische Ovids Metamorphosenproömium (met. I,1-4) gewählt. Die beigefügten Hypertexte machen den Schülern den Zusammenhang zwischen Original und jeweiliger Übersetzung klar und verdeutlichen insbesondere die – vor allem für Schüler unterer Klassenstufen schwer zu erkennenden – Hyperbata. Die drei Varianten der Ovid-Übersetzung ermöglichen den Einsatz in verschiedenen Altersstufen.
description: Pegasus-Onlinezeitschrift, Bd. 7, Nr. 1 (2007): Pegasus-Onlinezeitschrift
Krasser, Helmut/Schmidt, ErnstA. [Hrsg.]: Zeitgenosse Horaz. Der Dichter und seine Leser seit zwei Jahrtausenden
Creators: name: Wölke, Hansjörg
Publisher: name: Forum Classicum
Year: 2017

description: Rezension zu: Krasser, Helmut/Schmidt, ErnstA. [Hrsg.]: Zeitgenosse Horaz. Der Dichter und seine Leser seit zwei Jahrtausenden. Tübingen: Gunter Narr Verlag 1996. 487 S. 96,00 DM (ISBN 3-8233-4148- 0)
description: Forum Classicum, Nr. 2 (1997): Forum Classicum
Hate or glory: a categorical and experimental consideration of Bronze Age halberds in Scotland in relation to MBA weaponry
Creators: name: Faulkner-Jones, Rachel
Publisher: name: The University of Edinburgh
Year: 2021
Subjects: Scotland
Bronze Age
Experimental

description: Despite being one of the largest collections of their type in Europe, the Early Bronze Age halberds in Scotland have not been catalogued or analysed since Coles’ 1968-9 work. Accordingly, every halberd in Scotland was recorded and catalogued to assess the size and level of preservation of the assemblage. Experimental work using a replica halberd was designed to determine the combat capabilities and limitations of the weapon, and to determine the extent of damage inflicted on the blades during interpersonal combat. Prior to this, experiments using a replica Middle Bronze Age dirk from Friarton, Perthshire were designed to establish the methodology and experimental protocol. During the creation of the experimental protocols, parameters considered included the design and manufacture of the replica, the human tissue analogue used, the layout and audience for the experiment, and the subsequent data analysis. The experimentally derived data on the dirk were compared with extant catalogue data to investigate whether the damage inflicted on the replica blade could be observed on the prehistoric dirks. Following the methodology and experimental protocol refined following the investigations with the replica dirk, the replica halberd experiments were then undertaken, first using SynboneTM as a skeletal tissue proxy, and secondly a pig carcass as a soft tissue proxy. The damage to the replica halberd blades observed following the experiments was analysed and compared to the newly-catalogued prehistoric halberd assemblage An interpretative model synthesising all the halberd data was then derived as one possible interpretation as to the uses and distribution of the halberds; the halberds were shown experimentally to be functional combat weapons, able to be used effectively with no great amount of training or mobility, and the mending and conservation evidence in the prehistoric assemblage is hypothesised to be linked to their role as combat and political power proxies in long-distance communication networks across northern Europe.
Fingerprinting Rotons in a Dipolar Condensate: Super-Poissonian Peak in the Atom-Number Fluctuations
Creators: name: Bisset, R. N.
name: Blakie, P. B.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We demonstrate that measurements of atom-number fluctuations in a trapped dipolar condensate can reveal the presence of the elusive roton excitation. The key signature is a super-Poissonian peak in the fluctuations as the size of the measurement cell is varied, with the maximum occurring when the size is comparable to the roton wavelength. The magnitude of this roton feature is enhanced with temperature. The variation in fluctuations across the condensate demonstrates that the roton excitations are effectively confined to propagate in the densest central region, realizing a density trapped roton gas. While our main results are based on full numerical solutions of the meanfield equations, we also develop and validate a simple local density theory. Finally, we consider fluctuations measured within a washer-shaped cell which filters out the contribution of modes with nonzero angular momentum and provides a signal sensitive to individual roton modes.
description: 5 pages, 5 figures
Pre-acceleration from Landau-Lifshitz Series
Creators: name: Zhang, Sen
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: Classical Physics (physics.class-ph)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: The Landau-Lifshitz equation is considered as an approximation of the Abraham-Lorentz-Dirac equation. It is derived from the Abraham-Lorentz-Dirac equation by treating radiation reaction terms as a perturbation. However, while the Abraham-Lorentz-Dirac equation has pathological solutions of pre-acceleration and runaway, the Landau-Lifshitz equation and its finite higher order extensions are free of these problems. So it seems mysterious that the property of solutions of these two equations is so different. In this paper we show that the problems of pre-acceleration and runaway appear when one consider a series of all-order perturbation which we call it the Landau-Lifshitz series. We show that the Landau-Lifshitz series diverges in general. Hence a resummation is necessary to obtain a well-defined solution from the Landau-Lifshitz series. This resummation leads the pre-accelerating and the runaway solutions. The analysis is focusing on the non-relativistic case, but we can extend the results obtained here to relativistic case at least in one dimension.
description: 16 pages
Stefan Kipf, Peter Kuhlmann (Hg.): Perspektiven für den Lateinunterricht. Ergebnisse der Dresdner Tagung vom 5./6.12.2013
Creators: name: Chwalek, Burkard
Publisher: name: Forum Classicum
Year: 2017

description: Rezension zu: Stefan Kipf, Peter Kuhlmann (Hg.): Perspektiven für den Lateinunterricht. Ergebnisse der Dresdner Tagung vom 5./6.12.2013. Bamberg C. C. Buchner 2015. 55 S. (ISBN 978-3-7661-8007-0).
description: Forum Classicum, Nr. 1 (2016): Forum Classicum
Geology of the Alston district Houghton and Baraga Counties, Michigan
Creators: name: Roberts, Ellis Earl
Publisher: name: California Institute of Technology
Year: 1940
Subjects: subject: Sturgeon Falls
subject: Jacobsville Sandstone
subject: Keweenaw Fault
subject: Keweenaw Point
subject: Sturgeon River
subject: Geology
subject: FOS: Earth and related environmental sciences

description: The copper-bearing sediments and flows of Keweena age which underlie the northwest side of Keweenaw Point form a conformable series which to the southeast has been thrust over the Cambrian Jacobsville sandstone. The stratigraphic correlation of the Freda sandstone, which lies at the top of the copper-bearing series, to the Jacobsvilie sandstone is uncertain, as are also the definite dating of the periods of deformation and the age of the copper mineralization.

Field work was conducted to the southeast of the main copper-bearing area with the hope of establishing: (1) the date of the native copper mineralization, (2) the relations of the Freda and Jacobsville sandstones, and (3) the dates of deformation.

The existence of a pre-Jacobsville period of mineralization was established, but its correlation with the native copper mineralization to the northwest cannot be definitely established.

The Jacobsville sandstone rests unconformably upon Keweenawan flows; in an adjacent area, the Freda sandstone rests conformably on flows of the same character. Hence the Jacobsville sandstone is thought to be later than and unconformable to the Freda sandstone.

At one locality the Keweenann flows are tilted and sheared, while the overlying Jacobsville sandstone is not affected, thus proving the existence of a pre-Jacobsville but post-Keweenawan deformation. Elsewhere, the marked disturbances of Lower Paleozoic strata prove another period of deformation which is definitely later than the Silurian, and probably later than the Devonian.
The Case for a Climate-Smart Update of the Africa Mining Vision
Creators: name: Toledano, Perrine
name: Brauch, Martin Dietrich
name: Bhuwalka, Karan
name: Busia, Kojo
Publisher: name: Columbia University
Year: 2021
Subjects: Mining engineering
Climatic changes--Government policy
Greenhouse gases
Sustainable development

description: The 2009 Africa Mining Vision (AMV) provides guidance for the industrialization of African countries by leveraging their mining sector. However, the global context has changed since its adoption. As a result, it does not include guidance on how governments should embrace the climate change agenda as an opportunity for better and further industrialization, deeper linkages, and sustainable development. There are many ways to look at the implications of international climate change policy for Africa, including through the increased extraction of minerals needed in clean energy application and the greening of mines. The localization of global value chains—induced by a rising carbon cost and by the desire to build resilience in supply chains in light of increased pandemic risks—provides another set of opportunities. Seizing this momentum will require policy guidance to ensure that the relocation of industries in global value chains occurs upstream (closer to mineral sources) rather than downstream (closer to final consumers). An open acknowledgment of the impact of climate change on the shifting global value chains for critical minerals and the need to broaden the governance framework to include the emerging role of sustainability and ESG requirements should form the foundation for a revised and revitalized AMV.
title: Innovative activity of a modern enterprise as a factor of its competitiveness
Creators: name: Chirov, A.N.
name: Zhumabaev, E.N.
name: Sapegin, A.M.
name: Sviridon, R.A.
Publisher: name: Scientific Research Centre "MachineStructure"
Year: 2019

description: In this article important aspects of innovative activity of a modern enterprise have been considered. The factor of its competitiveness has been emphasized.
Empowerment or Disintegration? Migration, Social Institutions, and Collective Action in Rural China
Creators: name: Lu, Yao
Publisher: name: Columbia University
Year: 2019
Subjects: Migration, Internal
Rural-urban migration
Rural-urban migration--Social aspects
Social institutions
Political participation
Peasants--Political activity

description: This paper integrates literature on social movements and migration to examine how migration shapes both the cognitive and social foundations of collective action in origin communities. Using longitudinal data and in-depth interviews from rural China, we find that outward migration spurs collective resistance in origin communities and shapes the form and scale of collective action. Migration fosters non-institutionalized rather than institutionalized collective action, because it induces relational diffusion that empowers peasants to mobilize and employ more effective resistance strategies. This holds more for small- and medium-size collective action than for large-scale mobilizations, mainly because out-migration can also trigger community disintegration that inhibits larger-scale action. Furthermore, local social institutions condition the role of migration: migration has a stronger positive impact in close-knit villages embedded in strong lineage networks than in less cohesive villages. We contextualize the findings against the distinct institutional arrangements in China, which were originally engineered to disenfranchise rural-origin people but which instead have inadvertently politicized migrants and peasants alike.
title: Laser thermal hardening of rotary crusher knives
Creators: name: Rasskazchikov, N.G.
Publisher: name: Scientific Research Centre "MachineStructure"
Year: 2019

description: The main equipment for processing plastic bottles is rotary crushers. The quality of the chopping steel knives of crushers is subject to high requirements, this helps to avoid premature wear and frequent sharpening. The article deals with the use of technological lasers to increase the hardness of the cutting edge of knives. The selection of laser thermal hardening modes was carried out using the methods of mathematical planning of the experiment, modeling and thermal imaging temperature control during processing.
title: Detection of welded joint fatigue damage using vibrodiagnostics
Creators: name: Annenkov, Ph.M.
Publisher: name: Scientific Research Centre "MachineStructure"
Year: 2019

description: In time diagnosis of welded joints fatigue is important problem of modern mechanical engineering. Methods of nondestructive control, as vibrodiagnostics, is a commonly used. The paper presents the problem of fatigue damage diagnosis of welded joint with initial imperfection as lack of fusion.
Exploring Double Field Theory
Creators: name: Geissbuhler, David
name: Marques, Diego
name: Nunez, Carmen
name: Penas, Victor
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We present a flux formulation of Double Field Theory, in which geometric and non-geometric fluxes are dynamical and field-dependent. Gauge consistency imposes a set of quadratic constraints on the dynamical fluxes, which can be solved by truly double configurations. The constraints are related to generalized Bianchi Identities for (non-)geometric fluxes in the double space, sourced by (exotic) branes. Following previous constructions, we then obtain generalized connections, torsion and curvatures compatible with the consistency conditions. The strong constraint-violating terms needed to make contact with gauged supergravities containing duality orbits of non-geometric fluxes, systematically arise in this formulation.
description: To appear in JHEP
title: Mathematical model and calculation of the temperature of a moving metal strip during multizone treatment of its surface by the cathode spots of vacuum arc discharge
Creators: name: Kuznetsov, V.G.
Publisher: name: Scientific Research Centre "MachineStructure"
Year: 2019

description: Environmentally friendly, resource-saving technologies and equipment of vacuum arc treatment (by the cathode spot of vacuum arc) of metal rolling surface are being developed. The solution of the problem of heat exchange of the metal tape heated in the process of surface cleaning at its continuous broaching through the vacuum chamber is considered. The mathematical model of process is offered, the program for computer calculation is developed, distributions of fields of temperatures in a conductor for concrete cases are received. The calculation results are in good agreement with the experimental data.
A estética da exclusão: imigrantes chineses em culturas visuais brasileiras na virada do século XX
Creators: name: Lee, Ana Paulina
Publisher: name: Columbia University
Year: 2019
Subjects: Emigration and immigration
Qing Dynasty (China)
Race relations
Nationalism

description: Este artigo examina os processos que levaram trabalhadores chineses ao Brasil, analisando documentos escritos por diplomatas e funcionários da dinastia Qing que viajaram ao Brasil para abrir rotas de imigração chinesa. As autoridades Qing utilizavam nesse contexto uma palavra que pode significar tanto imigração quanto colonização (yizhi). O Brasil, para eles, apresentava-se como uma opção viável tanto para a colonização quanto para a imigração devido ao seu vasto território e a suas leis de cidadania inclusivas. Discuto as questões levantadas por intelectuais ligados ao governo Qing sobre a abertura de rotas de imigração e comércio entre a China e o Brasil, em relação às preocupações dos abolicionistas brasileiros com a emancipação, a independência nacional e o desejo de branquear a composição racial da nova nação. Este artigo explora o que chamo de estética da exclusão para descrever a produção e a circulação de culturas visuais sobre os chineses enquanto raça, as quais contribuem para o discurso global da exclusão chinesa como uma necessidade da modernização brasileira e de seu investimento no branqueamento.
Umbral Vade Mecum
Creators: name: Curtright, Thomas L
name: Zachos, Cosmas K
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In recent years the umbral calculus has emerged from the shadows to provide an elegant correspondence framework that automatically gives systematic solutions of ubiquitous difference equations --- discretized versions of the differential cornerstones appearing in most areas of physics and engineering --- as maps of well-known continuous functions. This correspondence deftly sidesteps the use of more traditional methods to solve these difference equations. The umbral framework is discussed and illustrated here, with special attention given to umbral counterparts of the Airy, Kummer, and Whittaker equations, and to umbral maps of solitons for the Sine-Gordon, Korteweg--de Vries, and Toda systems.
description: arXiv admin note: text overlap with arXiv:0710.2306
Steffen Unger: Vorkoster gesucht! 100 Berufe aus der Antike
Creators: name: Mause, Michael
Publisher: name: Forum Classicum
Year: 2017

description: Rezension zu: Steffen Unger: Vorkoster gesucht! 100 Berufe aus der Antike, Darmstadt (Wissenschaftliche Buchesellschaft / Verlag Philipp von Zabern) 2015, 208 Seiten (ISBN 978-3-8053-4874-4)
description: Forum Classicum, Nr. 4 (2016): Forum Classicum
Deepwater Horizon Oil Spill Exposure, Industry Sector, and Child Health
Creators: name: Stroope, Samuel
name: Slack, Tim
name: Kroeger, Rhiannon A.
name: Sweet Keating, Kathryn
name: Beedasy, Jaishree
name: Sury, Jonathan
name: Brooks, Jeremy
name: Chandler, Thomas E.
Publisher: name: Columbia University
Year: 2021
Subjects: Children--Health and hygiene
Child disaster victims
BP Deepwater Horizon Explosion and Oil Spill (2010)
Oil spills--Health aspects
Fish trade--Economic aspects

description: The historic 2010 BP Deepwater Horizon Oil Spill (DHOS) led to public distress regarding potential impacts on children in nearby Gulf Coast communities. Using a community-based South Louisiana panel study of households with children, we examined the effect of fishing industry employment on changes in a subjective measure of general child health and whether economic and physical DHOS exposures played a mediating role. Fishing industry employment had a negative effect on child health compared to other industries. Economic exposure and physical exposure both mediated the effects of the fishing industry on child health, with economic exposure mediating a larger share (49.3%) of the relationship compared to physical exposure (40.5%). The importance of economic oil spill exposure in these findings highlights the significance of social determinants of health at the intersection of disasters and child vulnerability.
Chromosome arm length, and a species-specific determinant, define chromosome arm width
Creators: name: Kakui, Yasutaka
name: Barrington, Christopher
name: Kusano, Yoshiharu
name: Thadani, Rahul
name: Fallesen, Todd
name: Hirota, Toru
name: Uhlmann, Frank
Publisher: name: figshare
Year: 2022
Subjects: Cell and nuclear division
Genome structure and regulation

description: The Matlab scripts, images of human chromosome arms used for a semi-automated quantification of human chromosome dimensions. To download, please go to https://figshare.com/projects/Chromosome_arm_length_and_a_species-specific_determinant_shape_chromosome_arm_width/135329
Potential of EBL and cosmology studies with the Cherenkov Telescope Array
Creators: name: Mazin, Daniel
name: Raue, Martin
name: Behera, Bagmeet
name: Inoue, Susumu
name: Inoue, Yoshiyuki
name: Nakamori, Takeshi
name: Totani, Tomonori
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Very high energy (VHE, E >100 GeV) gamma-rays are absorbed via interaction with low-energy photons from the extragalactic background light (EBL) if the involved photon energies are above the threshold for electron-positron pair creation. The VHE gamma-ray absorption, which is energy dependent and increases strongly with redshift, distorts the VHE spectra observed from distant objects. The observed energy spectra of the AGNs carry, therefore, an imprint of the EBL. The detection of VHE gamma-ray spectra of distant sources (z = 0.11 - 0.54) by current generation Imaging Atmospheric Cherenkov Telescopes (IACTs) enabled to set strong upper limits on the EBL density, using certain basic assumptions about blazar physics. In this paper it is studied how the improved sensitivity of the Cherenkov Telescope Array (CTA) and its enlarged energy coverage will enlarge our knowledge about the EBL and its sources. CTA will deliver a large sample of AGN at different redshifts with detailed measured spectra. In addition, it will provide the exciting opportunity to use gamma ray bursts (GRBs) as probes for the EBL density at high redshifts.
description: 12 pages, 9 figures, to appear in Astroparticle Physics. arXiv admin note: text overlap with arXiv:1005.1196
Applications of a method for the analyses of many-electron wavefunctions
Creators: name: Hudson, Suzanne
Publisher: name: California Institute of Technology
Year: 1969
Subjects: Chemistry

description: We show how the method of successive partial orthogonalizations can be used to obtain approximate Hartree-Fock (HF) pair functions directly from the hydrogenic pair functions. The method is more practical than accurate but with the explicit Z-dependence of the bar -nuclei pair functions just eleven such pair functions are needed to obtain an approximate HF pair function by this method for any pair of orbitals in any first row atom. We use the same method of analysis to extract HF orbitals directly from suitable trial functions for the He-He system at several internuclear distances and and also for the auto-ionizing 2s^2 2p^2 states of helium. This approach avoids a separate variational calculation for the HF wave function and furthermore it provides approximate HF pair functions for these auto-ionizing states.
Mechanisms underlying resilience in ageing
Creators: name: Stern, Yaakov
name: Chetelat, Gael
name: Habeck, Christian G.
name: Arenaza‐Urquijo, Eider M.
name: Vemuri, Prashanthi
name: Estanga, Ainara
name: Bartrés‐Faz, David
name: Cantilon, Marc
name: Clouston, Sean A. P.
name: Elman, Jeremy A.
name: Gold, Brian T.
name: Jones, Richard
name: Kempermann, Gerd
name: Lim, Yen Ying
name: Van Loenhoud, Anita
name: Martínez-Lage, Pablo
name: Morbelli, Silvia
name: Okonkwo, Ozioma
name: Ossenkoppele, Rik
name: Pettigrew, Corinne
name: Rosen, Allyson C.
name: Scarmeas, Nikolaos
name: Soldan, Anja
name: Udeh‐Momoh, Chinedu
name: Valenzuela, Michael
name: Vuoksimaa, Eero
Publisher: name: Columbia University
Year: 2019
Subjects: Cognition--Age factors
Brain--Aging
Neurology

description: The recent Opinion article by Cabeza and colleagues (Maintenance, reserve and compensation: the cognitive neuroscience of healthy ageing. Nat. Rev. Neurosci. 19, 701–710 (2018))1 provides definitions for reserve and maintenance along with a detailed description of compensatory mechanisms from a cognitive ageing perspective. The article represents a much-needed effort to refine the definitions for various forms of compensation. Nevertheless, the definitions presented by Cabeza et al. for reserve, maintenance and compensation diverge from the ‘whitepaper’ consensus definitions developed by a workgroup of 31 researchers2 in ways that we believe are not ideal in terms of their ability to capture the full extent of the mechanisms underlying individual differences in resilience.
Die Bandkeramik in Pommern
Creators: name: Kunkel, Otto
Publisher: name: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts
Year: 2017

description: [nicht erschienen / not available]
description: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts, Bd. 18, Nr. 3 (1934)
Chromosome arm length, and a species-specific determinant, shape chromosome arm width
Creators: name: Kakui, Yasutaka
name: Barrington, Christopher
name: Kusano, Yoshiharu
name: Thadani, Rahul
name: Fallesen, Todd
name: Hirota, Toru
name: Uhlmann, Frank
Publisher: name: figshare
Year: 2022
Subjects: Cell and nuclear division
Genome structure and regulation

description: The Matlab scripts, images of human chromosome arms used for a semi-automated quantification of human chromosome dimensions.
Caravan Cities
Creators: name: Werner, Joachim
Publisher: name: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts
Year: 2017

description: Rezension zu: Michael Rostovtzeff, Caravan Cities. Oxford 1932. 232 S., 4 Abb., 35 Taf.
description: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts, Bd. 18, Nr. 4 (1934)
Reconciling quantum trajectories and stationary quantum distributions in single-photon polarization states
Creators: name: Luis, A.
name: Sanz, A. S.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Optics (physics.optics)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The question of the representation of quantum stationary partially polarized waves as random superpositions of different polarization ellipses is addressed. To this end, the Bohmian formulation of quantum mechanics is considered and extended to quantum optical polarization. As is shown, this approach properly combines definite time-evolving trajectories with rigorous stationary quantum distributions via the topology displayed by the associated phase field.
description: 9 pages, 6 figures
Digital-analog quantum convolutional neural networks for image classification
Creators: name: Simen, Anton
name: Flores-Garrigos, Carlos
name: Hegade, Narendra N.
name: Montalban, Iraitz
name: Vives-Gilabert, Yolanda
name: Michon, Eric
name: Zhang, Qi
name: Solano, Enrique
name: Martín-Guerrero, José D.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We propose digital-analog quantum kernels for enhancing the detection of complex features in the classification of images. We consider multipartite-entangled analog blocks, stemming from native Ising interactions in neutral-atom quantum processors, and individual operations as digital steps to implement the protocol. To further improving the detection of complex features, we apply multiple quantum kernels by varying the qubit connectivity according to the hardware constraints. An architecture that combines non-trainable quantum kernels and standard convolutional neural networks is used to classify realistic medical images, from breast cancer and pneumonia diseases, with a significantly reduced number of parameters. Despite this fact, the model exhibits better performance than its classical counterparts and achieves comparable metrics according to public benchmarks. These findings demonstrate the relevance of digital-analog encoding, paving the way for surpassing classical models in image recognition approaching us to quantum-advantage regimes.
description: 7 pages, 3 figures
Towards a Workload for Evolutionary Analytics
Creators: name: LeFevre, Jeff
name: Sankaranarayanan, Jagan
name: Hacigumus, Hakan
name: Tatemura, Junichi
name: Polyzotis, Neoklis
Publisher: name: arXiv
Year: 2013
Subjects: subject: Databases (cs.DB)
subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: Performance (cs.PF)
subject: FOS: Computer and information sciences

description: Emerging data analysis involves the ingestion and exploration of new data sets, application of complex functions, and frequent query revisions based on observing prior query answers. We call this new type of analysis evolutionary analytics and identify its properties. This type of analysis is not well represented by current benchmark workloads. In this paper, we present a workload and identify several metrics to test system support for evolutionary analytics. Along with our metrics, we present methodologies for running the workload that capture this analytical scenario.
description: 10 pages
Climate variability and change of Mediterranean-type climates
Creators: name: Seager, Richard
name: Osborn, Timothy J.
name: Kushnir, Yochanan
name: Simpson, Isla R.
name: Nakamura, Jennifer A.
name: Liu, Haibo
Publisher: name: Columbia University
Year: 2019
Subjects: Climatic changes
Ocean-atmosphere interaction
Hydrologic cycle
Mediterranean climate

description: Mediterranean-type climates are defined by temperate, wet winters and hot or warm dry summers and exist at the western edges of five continents in locations determined by the geography of winter storm tracks and summer subtropical anticyclones. Here the climatology, variability and long term changes in winter precipitation in Mediterranean-type climates are analyzed and the mechanisms for model-projected change in the near-term future. Despite commonalities in terms of location in the context of planetary scale dynamics, the causes of variability are distinct across the regions. Internal atmospheric variability is the dominant source of winter precipitation variability in all Mediterranean-type climate regions, but only in the Mediterranean is this clearly related to annular mode variability. Only in California and Chile is ocean forcing of variability a notable influence. As a consequence, potential predictability of winter precipitation variability in the regions is low. In all regions, the trend in winter precipitation since 1901 is similar to that which arises as a response to changes in external forcing in the models participating in Coupled Model Intercomparison Project Five. All Mediterranean-type climate regions, except in North America, have dried and the models project further drying over coming decades. In the northern hemisphere, dynamical processes are responsible: development of a winter ridge over the Mediterranean that suppresses precipitation and of a trough west of the North American west coast that shifts the Pacific stormtrack equatorward. In the southern hemisphere, mixed dynamic-thermodynamic changes are important that place a minimum in vertically integrated water vapor change at the coast and enhance zonal dry advection into Mediterranean-type climate regions inland.
Air-sea interaction and the seasonal cycle of the subtropical anticyclones
Creators: name: Seager, Richard
name: Murtugudde, Ragu
name: Naik, Naomi H.
name: Clement, Amy
name: Gordon, Neil
name: Miller, Jennifer
Publisher: name: Columbia University
Year: 2003
Subjects: High pressure systems (Meteorology)
Ocean-atmosphere interaction
Ocean temperature
Atmospheric circulation

description: The causes of the seasonal cycles of the subtropical anticyclones, and the associated zonal asymmetries of sea surface temperature (SST) across the subtropical oceans, are examined. In all basins the cool waters in the east and warm waters in the west are sustained by a mix of atmosphere and ocean processes. When the anticyclones are best developed, during local summer, subsidence and equatorward advection on the eastern flanks of the anticyclones cool SSTs, while poleward flow on the western flanks warms SSTs. During local winter the SST asymmetry across the subtropical North Atlantic and North Pacific is maintained by warm water advection in the western boundary currents that offsets the large extraction of heat by advection of cold, dry air of the continents and by transient eddies. In the Southern Hemisphere ocean processes are equally important in cooling the eastern oceans by upwelling and advection during local winter. Ocean dynamics are important in amplifying the SST asymmetry, as experiments with general circulation models show. This amplification has little impact on the seasonal cycle of the anticyclones in the Northern Hemisphere, strengthens the anticyclones in the Southern Hemisphere, and helps position the anticyclones over the eastern basins in both hemispheres. Experiments with an idealized model are used to suggest that the subtropical anticyclones arise fundamentally as a response to monsoonal heating over land but need further amplification to bring them up to observed strength. The amplification is provided by local air–sea interaction. The SST asymmetry, generated through local air–sea interaction by the weak anticyclones forced by heating over land, stabilizes the atmosphere to deep convection in the east and destabilizes it in the west. Convection spreads from the land regions to the adjacent regions of the western subtropical oceans, and the enhanced zonal asymmetry of atmospheric heating strengthens the subtropical anticyclones.