cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Dynamical Ionization Bounds for Atoms
Creators: name: Lenzmann, Enno
name: Lewin, Mathieu
Publisher: name: arXiv
Year: 2012
Subjects: subject: Analysis of PDEs (math.AP)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: We study the long-time behavior of the 3-dimensional repulsive nonlinear Hartree equation with an external attractive Coulomb potential $-Z/|x|$, which is a nonlinear model for the quantum dynamics of an atom. We show that, after a sufficiently long time, the average number of electrons in any finite ball is always smaller than 4Z (respectively 2Z in the radial case). This is a time-dependent generalization of a celebrated result by E.H. Lieb on the maximum negative ionization of atoms in the stationary case. Our proof involves a novel positive commutator argument (based on the cubic weight $|x|^3$) and our findings are reminiscent of the RAGE theorem. In addition, we prove a similar universal bound on the local kinetic energy. In particular, our main result means that, in a weak sense, any solution is attracted to a bounded set in the energy space, whatever the size of the initial datum. Moreover, we extend our main result to Hartree--Fock theory and to the linear many-body Schrödinger equation for atoms.
Alternation of sign of magnetization current in driven XXZ chains with twisted XY boundary gradients
Creators: name: Popkov, V.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We investigate an open XXZ spin 1/2 chain driven out of equilibrium by coupling with boundary reservoirs targeting different spin orientations in XY plane. Symmetries of the model are revealed which appear to be different for spin chains of odd and even sizes. As a result, spin current is found to alternate with chain length, ruling out the possibility of ballistic transport. Heat transport is switched off completely by virtue of another global symmetry. Further, we investigate the model numerically and analytically. At strong coupling, we find exact nonequilibrium steady state using a perturbation theory. The state is determined by solving secular conditions which guarantee self-consistency of the perturbative expansion. We find nontrivial dependence of the magnetization current on the spin chain anisotropy $Δ$ in the critical region $|Δ|<1$, and a phenomenon of tripling of the twisting angle along the chain for narrow lacunes of $Δ$.
description: 12 pages, 6 figures
Inhalt des Heftes 1999/3
Creators: name: Redaktion, Die
Publisher: name: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
Year: 2018

description: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege, Bd. 40 Nr. 3 (1999): Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
Eine Burgengruppe der thüringischen Grafen von Schwarzburg Beitrag zur vergleichenden Burgenforschung
Creators: name: Maurer, Hans-Martin
Publisher: name: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
Year: 2018

description: -
description: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege, Bd. 41 Nr. 1 (2000): Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
Die Fürstenburg in Stettin/Szczecin
Creators: name: Radacki, Raimund
Publisher: name: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
Year: 2018

description: -
description: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege, Bd. 41 Nr. 1 (2000): Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
title: Essays on firms in developing countries
Creators: name: Nyamdavaa, Tsogsag
Publisher: name: London School of Economics and Political Science (LSE)
Year: 2021

description: This thesis examines firms in developing countries. The first chapter provides evidence on the effects of consumer monitoring on tax evasion behaviour of firms along the supply chain. I study a Mongolian government program, which incentivises consumers to report their purchases. First, I estimate the effect of the program on corporate income tax (CIT) and value-added tax (VAT), by comparing retailers who are directly affected, and wholesalers, who are only indirectly affected. I find that retailers increase their reported sales, but partly offset this by artificially inflating their costs on CIT returns. As a result, retailers' CIT liabilities increase by 11%. In comparison, their VAT liabilities increase by 31% because VAT is less prone to such cost manipulation. Second, I find that the program also increases the VAT liabilities of upstream firms by about 15% when they are more likely to sell to (monitored) retailers, compared to the upstream firms that sell to firms that are not directly monitored. The program does not, however, affect the upstream firms' reported CIT liabilities. My findings highlight the enforcement advantage of VAT compared to CIT and that consumer monitoring enhances the self-enforcing mechanism in VAT along the supply chain. The second chapter characterises tax-evading firms using the same program in Mongolia. In particular, I study the firms that reported an abnormally large growth in their sales in the year that the program was launched, which suggests that those firms had previously been evading more taxes. I find that tax evasion was particularly prevalent among smaller firms, and conditional on firm size it was more common among older firms. My findings also suggest that tax evasion was more common in the capital city. The third chapter studies how resources should be allocated across firms. In particular, I theoretically investigate a trade-off between static and dynamic optimality conditions in terms of resource allocation across firms in the presence of learning-by-doing (LBD) effect. As in the standard misallocation literature, the static efficiency requires firms to have the same marginal revenue products (MRP) within each sector. In contrast, in the long run, I show that it is optimal to have some degree of dispersion in the MRP when there is an endogenous productivity growth through LBD mechanism. Then I compare 5 the implications from the dynamic and the static models quantitatively by using firm- level panel data from Indonesia. First, I show that firms' productivity process exhibits LBD mechanism. Namely, small and younger firms have lower productivity level but have higher productivity growth compared to larger and older firms. Second, I simulate both models and find that the dynamic model increases the aggregate TFP more in the long run than the static optimality conditions where I remove all dispersion in MRP.
A longitudinal gauge degree of freedom and the Pais Uhlenbeck field
Creators: name: Jiménez, Jose Beltrán
name: Di Dio, Enea
name: Durrer, Ruth
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We show that a longitudinal gauge degree of freedom for a vector field is equivalent to a Pais-Uhlenbeck scalar field. With the help of this equivalence, we can determine natural interactions of this field with scalars and fermions. Since the theory has a global U(1) symmetry, we have the usual conserved current of the charged fields, thanks to which the dynamics of the scalar field is not modified by the interactions. We use this fact to consistently quantize the theory even in the presence of interactions. We argue that such a degree of freedom can only be excited by gravitational effects like the inflationary era of the early universe and may play the role of dark energy in the form of an effective cosmological constant whose value is linked to the inflation scale.
description: 20 pages, no figures. Minor changes and comments added to match the accepted version in JHEP
Inhaltsverzeichnis
Creators: name: Redaktion, Die
Publisher: name: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
Year: 2018

description: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege, Bd. 44 Nr. 2 (2003): Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
Gottfried Semper (1803 bis 1879) – Architektur und Wissenschaft
Creators: name: Oelwein, Cornelia
Publisher: name: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
Year: 2018

description: -
description: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege, Bd. 44 Nr. 2 (2003): Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
A Projection Argument for Differential Inclusions, with Applications to Persistence of Mass-Action Kinetics
Creators: name: Gopalkrishnan, Manoj
name: Miller, Ezra
name: Shiu, Anne
Publisher: name: arXiv
Year: 2012
Subjects: subject: Dynamical Systems (math.DS)
subject: Systems and Control (eess.SY)
subject: Molecular Networks (q-bio.MN)
subject: FOS: Mathematics
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Biological sciences

description: Motivated by questions in mass-action kinetics, we introduce the notion of vertexical family of differential inclusions. Defined on open hypercubes, these families are characterized by particular good behavior under projection maps. The motivating examples are certain families of reaction networks -- including reversible, weakly reversible, endotactic, and strongly endotactic reaction networks -- that give rise to vertexical families of mass-action differential inclusions. We prove that vertexical families are amenable to structural induction. Consequently, a trajectory of a vertexical family approaches the boundary if and only if either the trajectory approaches a vertex of the hypercube, or a trajectory in a lower-dimensional member of the family approaches the boundary. With this technology, we make progress on the global attractor conjecture, a central open problem concerning mass-action kinetics systems. Additionally, we phrase mass-action kinetics as a functor on reaction networks with variable rates.
description: v5: published version; v3 and v4: minor additional edits; v2: contains more general version of main theorem on vertexical families, including its accompanying corollaries -- some of them new; final section contains new results relating to prior and future research on persistence of mass-action systems; improved exposition throughout
Eine zweite Kapelle auf Burg Hohenbaden?
Creators: name: Wagner, Heiko
name: Dendler, Regine
Publisher: name: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
Year: 2018

description: -
description: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege, Bd. 44 Nr. 4 (2003): Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
The Weight of Emptiness: The Gravitational Lensing Signal of Stacked Voids
Creators: name: Krause, Elisabeth
name: Chang, Tzu-Ching
name: Doré, Olivier
name: Umetsu, Keiichi
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The upcoming new generation of spectroscopic galaxy redshift surveys will provide large samples of cosmic voids, the distinct, large underdense structures in the universe. Combining these with future galaxy imaging surveys, we study the prospects of probing the underlying matter distribution in and around cosmic voids via the weak gravitational lensing effects of stacked voids, utilizing both shear and magnification information. The statistical precision is greatly improved by stacking together a large number of voids along different lines of sight, even when taking into account the impact of inherent miscentering and projection effects. We show that Dark Energy Task Force Stage IV surveys, such as the Euclid satellite and the Large Synoptic Survey Telescope, should be able to detect the void lensing signal with sufficient precision from stacking abundant medium-sized voids, thus providing direct constraints on the matter density profile of voids independent of assumptions on galaxy bias.
description: references added, matches ApJL accepted version
A unified model of droplet epitaxy for compound semiconductor nanostructures: experiments and theory
Creators: name: Reyes, Kristofer
name: Smereka, Peter
name: Nothern, Denis
name: Millunchick, Joanna Mirecki
name: Bietti, Sergio
name: Somaschini, Claudio
name: Sanguinetti, Stefano
name: Frigeri, Cesare
Publisher: name: arXiv
Year: 2012
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We present a unified model of compound semiconductor growth based on kinetic Monte Carlo simulations in tandem with new experimental results that can describe and predict the mechanisms for the formation of various types of nanostructures observed during droplet epitaxy. The crucial features of the model include the explicit and independent representation of atoms with different species and the ability to treat solid and liquid phases independently. Using this model, we examine nanostructural evolution in droplet epitaxy. The model faithfully captures several of the experimentally observed structures, including compact islands and nanorings. Moreover, simulations show the presence of Ga/GaAs core-shell structures that we validate experimentally. A fully analytical model of droplet epitaxy that explains the relationship between growth conditions and the resulting nanostructures is presented, yielding key insight into the mechanisms of droplet epitaxy.
Excitation Conditions for Surface-Enhanced Hyper Raman Scattering With Biocompatible Gold Nanosubstrates
Creators: name: Dusa, Arpad
name: Madzharova, Fani
name: Kneipp, Janina
Publisher: name: Humboldt-Universität zu Berlin
Year: 2021
Subjects: subject: gold nanoparticles
subject: gold nanorods
subject: finite-difference time-domain
subject: electromagnetic enhancement
subject: dimer
subject: surface-enhanced hyper Raman scattering
subject: surface-enhanced Raman scattering
subject: two-photon excitation
subject: 540 Chemie und zugeordnete Wissenschaften

description: Surface enhanced hyper Raman scattering (SEHRS) can provide many advantages to probing of biological samples due to unique surface sensitivity and vibrational information complementary to surface-enhanced Raman scattering (SERS). To explore the conditions for an optimum electromagnetic enhancement of SEHRS by dimers of biocompatible gold nanospheres and gold nanorods, finite-difference time-domain (FDTD) simulations were carried out for a broad range of excitation wavelengths from the visible through the short-wave infrared (SWIR). The results confirm an important contribution by the enhancement of the intensity of the laser field, due to the two-photon, non-linear excitation of the effect. For excitation laser wavelengths above 1,000 nm, the hyper Raman scattering (HRS) field determines the enhancement in SEHRS significantly, despite its linear contribution, due to resonances of the HRS light with plasmon modes of the gold nanodimers. The high robustness of the SEHRS enhancement across the SWIR wavelength range can compensate for variations in the optical properties of gold nanostructures in real biological environments.
Feynman scaling violation on baryon spectra in pp collisions at LHC and cosmic ray energies
Creators: name: Arakelyan, G. H.
name: Merino, C.
name: Pajares, C.
name: Shabelski, Yu. M.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: A significant asymmetry in baryon/antibaryon yields in the central region of high energy collisions is observed when the initial state has non-zero baryon charge. This asymmetry is connected with the possibility of baryon charge diffusion in rapidity space. Such a diffusion should decrease the baryon charge in the fragmentation region and translate into the corresponding decrease of the multiplicity of leading baryons. As a result, a new mechanism for Feynman scaling violation in the fragmentation region is obtained. Another numerically more significant reason for the Feynman scaling violation comes from the fact that the average number of cutted Pomerons increases with initial energy. We present the quantitative predictions of the Quark-Gluon String Model (QGSM) for the Feynman scaling violation at LHC energies and at even higher energies that can be important for cosmic ray physics.
description: 21 pages, 11 figures, and 1 table. arXiv admin note: substantial text overlap with arXiv:1107.1615, arXiv:1007.3206
title: Zur Erinnerung an Karl Brunner von Zürich
title: Geboren 14. Januar 1869, gestorben 28. Oktober 1899
titleType: Subtitle
title: Den Freunden seines allzufrüh geschiedenen Ehrenmitgliedes gewidmet vom Turnverein Neumünster-Zürich
titleType: Subtitle
Creators: name: Ritter, A.
name: Graf, Eduard
name: Aeppli, Emil
Publisher: name: Hürlimann & Fischer
Year: 1899
Subjects: subject: 920 Biografien, Genealogie, Insignien
subject: Nachruf

description: Enthält: Personalien von Karl Brunner; Leichenrede gehalten von A. Ritter, Pfarrer; Nachruf am Grabe gehalten von Ed. Graf, Bankpräsident; Letzter Gruss an Karl Brunner, gesprochen am Grabe von Emil Aeppli.
5G-based localization in industrial environments
Creators: name: Frischkorn, Bjarne
name: Knitter, Michael
name: Endemann, Wolfgang
name: Kays, Rüdiger
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2023
Subjects: subject: 5G
subject: Survey
subject: Indoor
subject: Rising Edge
subject: Localization
subject: 621.3

description: This paper focuses on challenges occurring when using the 5G NR standard as a real- world application for precise localization in industrial environments. The different aspects of a mobile network based localization approach are discussed. First an overview on mobile network setup is given. Based on a mobile network emulation a first localization is conducted in an indoor laboratory. Afterwards the influence of indoor channel properties and the arising problems are discussed. With the results from this discussion, a new system model is introduced to improve the localization accuracy down to one meter.
A chiral magnetic spiral in the holographic Sakai-Sugimoto model
Creators: name: Ballon-Bayona, Alfonso
name: Peeters, Kasper
name: Zamaklar, Marija
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We investigate the effect of a magnetic field on the vacuum of low-temperature QCD at large-N_c in the presence of a chiral chemical potential, using the holographic Sakai-Sugimoto model. Above some critical chemical potential we find an instability, which triggers a decay of the homogeneous vacuum to a non-homogeneous configuration with a spiral form, which we construct explicitly. We find that this decay is suppressed for sufficiently large magnetic field, and determine the critical strength. We find that the new vacuum does not exhibit the chiral magnetic effect. This is related to the way the chiral chemical potential is introduced. We discuss an alternative way of introducing the chiral chemical potential that leads to a nonzero chiral magnetic effect.
description: 40 pages; v2: references added, minor typos corrected
Geons and Spin-2 Condensates in the AdS Soliton
Creators: name: Hartnett, Gavin S.
name: Horowitz, Gary T.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We construct geons starting with gravitational perturbations of the AdS soliton. Previous studies of a charged scalar field in the soliton background showed a holographic insulator/superconductor transition at a critical chemical potential. We explore the possibility that dimensional reduction of the geon could model a transition to a d-wave superconductor. We find that although one does get a charged spin-2 condensate, it has higher free energy than the state without the condensate, so there is no phase transition.
description: 12 pages, v2: minor changes to Fig. 2
Standardisierte Maschinenanbindung an ein Produktionsleitsystem über die Asset Administration Shell : Gewinnung und Auswertung von Maschinendaten für die Prozessoptimierung
Creators: name: Schließmann, Alexander
name: Stolze, Melanie
name: Riedl, Matthias
name: Schroeder, Tizian
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2023
Subjects: subject: Asset Administration Shell
subject: Digitaler Zwilling
subject: Maschinenanbindung
subject: OPC UA
subject: 621.3

description: Die Verwaltung unterschiedlicher Maschinentypen von verschiedenen Herstellern in einer heterogenen Produktionsanlage ist aufgrund proprietärer Schnittstellen und unterschiedlicher Informationsmodelle umständlich. Dies erschwert eine ganzheitliche Planung und macht die Prozessoptimierung komplex. Der Beitrag zeigt die Herausforderungen bei der Integration verschiedener Maschinen in ein Produktionsleitsystem auf und schlägt eine generische Lösung unter Verwendung von Asset Administration Shells (AAS) als digitale Zwillinge und etablierter Kommunikationsprotokolle wie OPC UA vor. Zudem werden Vorgehen und Tools für die praktische Umsetzung des Konzepts exemplarisch beschrieben.
Matryoshka Skyrmions
Creators: name: Nitta, Muneto
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Other Condensed Matter (cond-mat.other)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We construct a stable Skyrmion in 3+1 dimensions as a sine-Gordon kink inside a domain wall within a domain wall in an O(4) sigma model with hierarchical mass terms without the Skyrme term. We also find that higher dimensional Skyrmions can stably exist with a help of non-Abelian domain walls in an O(N) model with hierarchical mass terms without a Skyrme term, which leads a matryoshka structure of Skyrmions.
description: 14 pages, 3+1 figures, v2: references added, published version
Automatic generation and orchestration of active Asset Administration Shells with IO-Link
Creators: name: Evans, Benjamin
name: Chavez, Victor
name: Wollert, Jörg
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2023
Subjects: subject: Asset Administration Shells
subject: IO-Link
subject: Industry 4.0
subject: 621.3

description: This paper presents a proof of concept for automatically generating and orchestrating active asset administration shells (AAS) with IO-Link. AAS are software-based representations of physical assets that enable interoperability and standardised communication across different industrial systems. IO-Link is a widely adopted communication protocol for sensors and actuators in industrial automation. Our method uses an approach to generate AASs based on the IO-Link device description files. The generated AASs can then be orchestrated to form a distributed system that provides dynamic information about the status and performance of the connected assets. We demonstrate the effectiveness of our method through a proof of concept that involves the automatic generation and orchestration of AASs for a fluid processing unit equipped with pressure and flow sensors and a pump. The results show that our approach reduces the time and effort required to create and maintain active AASs.
Direct estimation of decoherence rates
Creators: name: Bužek, Vladimír
name: Rapcan, Peter
name: Rau, Jochen
name: Ziman, Mario
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The decoherence rate is a nonlinear channel parameter that describes quantitatively the decay of the off-diagonal elements of a density operator in the decoherence basis. We address the question of how to experimentally access such a nonlinear parameter directly without the need of complete process tomography. In particular, we design a simple experiment working with two copies of the channel, in which the registered mean value of a two-valued measurement directly determines the value of the average decoherence rate. No prior knowledge of the decoherence basis is required.
description: 7 pages, 2 figures, v2: reference added
A communication concept using 5G for the automated driving monorail vehicle MONOCAB
Creators: name: Bröring, Andre$
name: Neumann, Arne
name: Schmelter, Andreas
name: Jasperneite, Jürgen
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2023
Subjects: subject: 5G communication
subject: Railway
subject: V2X
subject: Remote control
subject: Security
subject: 621.3

description: The MONOCAB is an innovative monorail vehicle designed to operate in two directions simultaneously on a single rail track. To ensure smooth operations and efficient fleet management, various communi- cation needs arise. This paper outlines four common use cases and identifies nine communication requirements for the MONOCAB. Based on this, it presents a communication concept utilizing 5G technology, covering Vehicle-to-Vehicle (V2V) and Vehicle-to-Infrastructure (V2I) communication, as well as time critical communication to an edge application in a central control centre and non-time critical communication for fleet management and provision of information for the MONOCAB users.
Systemanalyse und Entwurf einer intelligenten Ladeinfrastruktur der Elektromobilität in Smart-Grid-Umgebungen
Creators: name: Dreyer, Niklas
name: Siemon, Michael Peter
name: Pretschner, Andreas
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2023
Subjects: subject: Elektromobilität
subject: intelligente Ladeinfrastrukturen
subject: Smart grid
subject: Vehicle-to-Grid
subject: OCPP
subject: Protokoll Verifikation und Konformität
subject: IEC15118-20
subject: 621.3

description: Im Paper werden die drei wichtigsten technischen Kommunikationsstandards einer mod- ernen Ladearchitektur, der ISO 15118-20, das Open Charge Point Protocol (OCPP) in der Version 2.0.1 und das Open Smart Charging Protocol (OSCP) 2.0 betrachtet. Welche Soft- wareanforderungen werden gestellt und in welchem Umfang müssen diese implemen- tiert werden, um eine Ladeinfrastruktur als intelligenten Verbraucher oder Energiespe- icher nutzen zu können? Wie kann man den Systementwurf testen, wie skaliert dieser Entwurf? Reicht es, wie bisher die Kommunikation zwischen einzelnen Akteuren zu stan- dardisieren oder sind weitreichendere Vorgaben notwendig, um die E-Mobilität und den Energiesektor nachhaltig zu koppeln? Die im Paper benutzte Methodik der schrittweisen partiellen Implementierung der notwendigen Softwarekomponenten ermöglicht den Auf- bau einer realen smart charging architecture auf deren Grundlage, ausgehend von einer „Minimalvariante“ bis zur „Vollversion“, das elektrische Fahrzeug aktives Speicherelement im geregelten elektrischen Netzwerk sein kann.
Spectrum of low-lying $s^{3}Q\bar{Q}$ configurations with negative parity
Creators: name: Yuan, S. G.
name: An, C. S.
name: Wei, K. W.
name: Zou, B. S.
name: Xu, H. S.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Spectrum of low-lying five-quark configurations with strangeness quantum number $S=-3$ and negative parity is studied in three kinds of constituent quark models, namely the one gluon exchange, Goldstone Boson exchange, and instanton-induced hyperfine interaction models, respectively. Our numerical results show that the lowest energy states in all the three employed models are lying at $\sim$1800 MeV, about 200 MeV lower than predictions of various quenched three-quark models. In addition, it is very interesting that the state with the lowest energy in one gluon exchange model is with spin 3/2, but 1/2 in the other two models.
description: Version published in Phys. Rev. C
Hyper-Entropic Gravitational Fireballs (Grireballs) with Firewalls
Creators: name: Page, Don N.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Recently there has been much discussion as to whether old black holes have firewalls at their surfaces that would destroy infalling observers. Though I suspect that a proper handling of nonlocality in quantum gravity may show that firewalls do not exist, it is interesting to consider an extension of the firewall idea to what seems to be the logically possible concept of hyper-entropic gravitational hot objects (gravitational fireballs or grireballs for short) that have more entropy than ordinary black holes of the same mass. Here some properties of such grireballs are discussed under various assumptions, such as assuming that their radii and entropies both go as powers of their masses as the one independent parameter, or assuming that their radii depend on both their masses and their entropies as two independent parameters.
description: 24 pages, LaTeX, revised slightly to respond to referee's comments, to add references, and to include WMAP 9-year and Planck data
Intralogistics application with a fleet of robots on a private 5G campus network
Creators: name: Kalter, Marc
name: Karbach, Dennis
name: Schellenberger, Christian
name: Schöneberg, Eric
name: Vierling, Axel
name: Schotten, Hans D.
name: Görges, Daniel
name: Berns, Karsten
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2023
Subjects: subject: 5G
subject: Intralogistics
subject: Private network
subject: Robot fleet
subject: Teleoperator
subject: ROS2
subject: Controlcenter
subject: 621.3

description: This paper presents the concept and the current state of implementation of a semi- autonomous robot fleet for logistics applications in a campus environment. The communication is realized via a private 5G SA network. The robot fleet performs its logistics tasks semi-autonomously on campus and can deliver mail or parcels, for example. Sensor data (GPS, camera images, 2D and 3D laser scanners, ...) is sent to a central computing unit in the control center via the 5G interface to analyze and store live data and influence the robot’s actions at real time to save costs of the robot and conserve energy to increase operating time. The operator in the control center can intervene in unusual situations at any time and remotely control the robots via 5G. The described system is being tested with a fixed private 5G SA network and a nomadic 5G SA network as public cellular networks are not performant enough in regards to low latency and upload bandwidth. The nomadic network approach opens up further application scenarios such as company premises or events. The system has so far been built and tested with one robot. The expansion of the robot fleet with different platforms is currently in progress.
Full Abstraction for the Resource Lambda Calculus with Tests, through Taylor Expansion
Creators: name: Ehrhard, Thomas
name: Bucciarelli, Antonio
name: Carraro, Alberto
name: Manzonetto, Giulio
Publisher: name: arXiv
Year: 2012
Subjects: subject: Logic in Computer Science (cs.LO)
subject: FOS: Computer and information sciences
subject: F.4.1

description: We study the semantics of a resource-sensitive extension of the lambda calculus in a canonical reflexive object of a category of sets and relations, a relational version of Scott's original model of the pure lambda calculus. This calculus is related to Boudol's resource calculus and is derived from Ehrhard and Regnier's differential extension of Linear Logic and of the lambda calculus. We extend it with new constructions, to be understood as implementing a very simple exception mechanism, and with a "must" parallel composition. These new operations allow to associate a context of this calculus with any point of the model and to prove full abstraction for the finite sub-calculus where ordinary lambda calculus application is not allowed. The result is then extended to the full calculus by means of a Taylor Expansion formula. As an intermediate result we prove that the exception mechanism is not essential in the finite sub-calculus.
Sparse rail network robustness analysis: Functional vulnerability levels of accidents resulting from human errors
Creators: name: Khademi, Navid
name: Bababeik, Mostafa
name: Fani, Amirhossein
Publisher: name: figshare
Year: 2021
Subjects: subject: 150702 Rail Transportation and Freight Services
subject: FOS: Economics and business
subject: 120506 Transport Planning
subject: FOS: Social and economic geography
subject: 90507 Transport Engineering
subject: FOS: Civil engineering
subject: 140217 Transport Economics

description: Transportation network vulnerability analysis has developed increasingly in the last decade with the goal to identify the most critical locations against incidences. In this domain, many of the previous researches have focused on congested urban networks; however, there is still a need to consider regional and interurban sparse rail networks, specifically those networks in developing countries. In such sparse rail networks, there are limited possibilities to redirect trains if a link is disrupted, there might be less possibility of finding redundant alternative routes, and network failures are usually accompanied by a phenomenon called ‘unsatisfied demand.’ The study reported in this paper stemmed from research aimed to design precautionary actions for a developing country's sparse railway system. Our study framework deemed to find the most vulnerable part of an inter-urban sparse rail network using a network scan approach, which found the consequences of network disruptions. A number of criteria were defined to determine the total cost including unsatisfied demand and additional transportation costs due to disruptions. The results showed that how well the process of the vulnerability analysis, considering the features of both supply and demand sides, can be a guide for railway authorities in applying system safety measures.
Role of the Subunits Interactions in the Conformational Transitions in Adult Human Hemoglobin: an Explicit Solvent Molecular Dynamics Study
Creators: name: Yusuff, Olaniyi K.
name: Babalola, Jonathan O.
name: Bussi, Giovanni
name: Raugei, Simone
Publisher: name: arXiv
Year: 2012
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Biological Physics (physics.bio-ph)
subject: Biomolecules (q-bio.BM)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: Hemoglobin exhibits allosteric structural changes upon ligand binding due to the dynamic interactions between the ligand binding sites, the amino acids residues and some other solutes present under physiological conditions. In the present study, the dynamical and quaternary structural changes occurring in two unligated (deoxy-) T structures, and two fully ligated (oxy-) R, R2 structures of adult human hemoglobin were investigated with molecular dynamics. It is shown that, in the sub-microsecond time scale, there is no marked difference in the global dynamics of the amino acids residues in both the oxy- and the deoxy- forms of the individual structures. In addition, the R, R2 are relatively stable and do not present quaternary conformational changes within the time scale of our simulations while the T structure is dynamically more flexible and exhibited the T\rightarrow R quaternary conformational transition, which is propagated by the relative rotation of the residues at the α1β2 and α2β1 interface.
description: Reprinted (adapted) with permission from J. Phys. Chem. B DOI:10.1021/jp3022908. Copyright (2012) American Chemical Society
Geometric Phase Gates with Adiabatic Control in Electron Spin Resonance
Creators: name: Wu, Hua
name: Gauger, Erik M.
name: George, Richard E.
name: Möttönen, Mikko
name: Riemann, Helge
name: Abrosimov, Nikolai V.
name: Becker, Peter
name: Pohl, Hans-Joachim
name: Itoh, Kohei M.
name: Thewalt, Mike L. W.
name: Morton, John J. L.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: High-fidelity quantum operations are a key requirement for fault-tolerant quantum information processing. In electron spin resonance, manipulation of the quantum spin is usually achieved with time-dependent microwave fields. In contrast to the conventional dynamic approach, adiabatic geometric phase operations are expected to be less sensitive to certain kinds of noise and field inhomogeneities. Here, we investigate such phase gates applied to electron spins both through simulations and experiments, showing that the adiabatic geometric phase gate is indeed inherently robust against inhomogeneity in the applied microwave field strength. While only little advantage is offered over error-correcting composite pulses for modest inhomogeneities <=10%, the adiabatic approach reveals its potential for situations where field inhomogeneities are unavoidably large.
On the association between core-collapse supernovae and HII regions
Creators: name: Crowther, Paul A.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Previous studies of the location of core-collapse supernovae (ccSNe) in their host galaxies have variously claimed an association with HII regions; no association; or an association only with hydrogen-deficient ccSNe. Here, we examine the immediate environments of 39 ccSNe whose positions are well known in nearby (<15 Mpc), low inclination (<65 degrees) hosts using mostly archival, continuum-subtracted H-alpha ground-based imaging. We find that 11 out of 29 hydrogen-rich ccSNe are spatially associated with HII regions (38 +/- 11%), versus 7 out of 10 hydrogen-poor ccSNe (70 +/- 26%). Similar results from Anderson et al. led to an interpretation that the progenitors of type Ib/c ccSNe are more massive than those of type II ccSNe. Here, we quantify the luminosities of HII region either coincident with, or nearby to the ccSNe. Characteristic nebulae are long-lived (~20 Myr) giant HII regions rather than short-lived (~4 Myr) isolated, compact HII regions. Therefore, the absence of a HII region from most type II ccSNe merely reflects the longer lifetime of stars with <12 Msun than giant HII regions. Conversely, the association of a HII region with most type Ib/c ccSNe is due to the shorter lifetime of stars with >12 Msun stars than the duty cycle of giant HII regions. Therefore, we conclude that the observed association between certain ccSNe and HII provides only weak constraints upon their progenitor masses. Nevertheless, we do favour lower mass progenitors for two type Ib/c ccSNe that lackassociated nebular emission, a host cluster or a nearby giant HII region. Finally, we also reconsider the association between long Gamma Ray Bursts and the peak continuum light from their (mostly) dwarf hosts, and conclude that this is suggestive of very high mass progenitors, in common with previous studies.
description: 16 pages, 2 figures, accepted for MNRAS. Revised version incl. full appendices and updated references
A Model for Large theta13 Constructed using the Eigenvectors of the S4 Rotation Matrices
Creators: name: Krishnan, R.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: A procedure for using the eigenvectors of the elements of the representations of a discrete group in model building is introduced and is used to construct a model that produces a large reactor mixing angle, sin^2(theta13)=2/3 sin^2(pi/16), in agreement with recent neutrino oscillation observations. The model fully constrains the neutrino mass ratios and predicts normal hierarchy with the light neutrino mass, m1~25 meV. Motivated by the model, a new mixing ansatz is postulated which predicts all the mixing angles within 1sigma errors.
description: 6 pages, 1 figure, contribution to the proceedings of DISCRETE 2012 to appear in the open access Journal of Physics: Conference Series (JPCS), preprint typeset in two-column revtex4 style
title: Individual humanitarian responses to global emergencies: an integrated framework of helping in context
Creators: name: Albayrak-Aydemir, Nihan
Publisher: name: London School of Economics and Political Science (LSE)
Year: 2021

description: This thesis examines individual humanitarian responses to global emergencies in the context of the Syrian refugee emergency. Through three empirical papers, it scrutinises political support, helping intention, and charitable donation of those who are physically and psychologically distant from Syrian refugees. The first paper tests the global-scale applicability of the bystander intervention model and assesses cognitive factors derived from context to account for the physical distance between potential helpers and refugees. Across three cross-sectional studies, it provides the first empirical evidence on global bystander intervention, develops a Global Bystander Intervention Scale, and recognises the visibility of the global emergency aftermaths within the context as a meaningful driver for help. The second paper utilises the social identity theory and investigates multiple identities in context and interaction to account for the psychological distance between potential helpers and refugees. Across three quasi-experimental and experimental studies, it provides authentic evidence on the role of national and religious identities in helping and identifies distinctive responses based on the interactions between the identities of potential helpers and refugees. The third paper integrates a social identity perspective into global bystander intervention and explores the joint role of cognitive and identity-based factors in helping those who are both physically and psychologically distant. Through a semi-structured in-depth interview study, it provides comprehensive evidence as to why people fail to help in global emergencies and proposes five key elements that shape individual helping responses in connection with physical and psychological distances. Overall, the thesis addresses some of the limitations of the social psychological literature on helping by examining helping in different forms and dimensions, with both quantitative and qualitative data, and within an integrated theoretical framework. The findings establish the importance of considering the primary and secondary effects of the context in which help takes place.
Dimensional crossover in spin-orbit-coupled semiconductor nanowires with induced superconducting pairing
Creators: name: Stanescu, Tudor D.
name: Lutchyn, Roman M.
name: Sarma, S. Das
Publisher: name: arXiv
Year: 2012
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We show that the topological Majorana modes in nanowires much longer than the superconducting coherence length are adiabatically connected with discrete zero-energy states generically occurring in short nanowires. We demonstrate that these zero-energy crossings can be tuned by an external magnetic field and are protected by the particle-hole symmetry. We study the evolution of the low-energy spectrum and the splitting oscillations as a function of magnetic field, wire length, and chemical potential, manifestly establishing that the low-energy physics of short wires is related to that occurring in long wires. This physics, which represents a hallmark of spinless p-wave superconductivity, can be observed in tunneling conductance measurements.
description: published version, 7 pages, 7 color figures
As Discrepâncias Sociais nos Sistemas de E-learning
Creators: name: Dinis, Ana
name: Barata, Bernardo
name: Fonseca, Maria
name: Veríssimo, Tiago
Publisher: name: Zenodo
Year: 2022
Subjects: E-Learning, Mestrado em Assessoria em Comunicação Digital, ISCAP

description: O E-Learning corresponde a um modelo de ensino não presencial que se encontra sustentado nas Tecnologias de Informação e Comunicação. Este trabalho teve o intuito de entender se as discrepâncias sociais que existem na sociedade têm alguma influência no tipo de aprendizagem e aquisição de conhecimentos em ambientes E-Learning.
 Assim sendo e inserido na unidade curricular de Sistemas de E-Learning, do Mestrado em Assessoria em Comunicação Digital, do Instituto Superior de Contabilidade e Administração do Porto (ISCAP) e em total colaboração com Ana Dinis, João Bernardo Barata e Maria Fonseca, realizamos um poster científico no qual abordamos o impacto de possíveis discrepâncias sociais em ambientes de aprendizagens E-Learning, mencionando os resultados de um inquérito realizado sobre o tema. São Mamede de Infesta, 12 de dezembro de 2022
M. Lauwers, La mémoire des ancêtres, le souci des morts. Morts, rites et société au Moyen Âge (Diocèse de Liège, XIe–XIIIe siècles), 1997
Creators: name: Peters, W.
Publisher: name: Francia
Year: 2019

description: Francia, Bd. 26 Nr. 1 (1999)
Muon conversion to electron in nuclei in type-I seesaw models
Creators: name: Alonso, Rodrigo
name: Dhen, Mikael
name: Gavela, Belen
name: Hambye, Thomas
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We compute the muon to electron conversion in the type-I seesaw model, as a function of the right-handed neutrino mixings and masses. The results are compared with previous computations in the literature. We determine the definite predictions resulting for the ratios between the muon to electron conversion rate for a given nucleus and the rate of two other processes which also involve a mu-e flavour transition: mu -> e gamma and mu -> eee. For a quasi-degenerate mass spectrum of right-handed neutrino masses -which is the most natural scenario leading to observable rates- those ratios depend only on the seesaw mass scale, offering a quite interesting testing ground. In the case of sterile neutrinos heavier than the electroweak scale, these ratios vanish typically for a mass scale of order a few TeV. Furthermore, the analysis performed here is also valid down to very light masses. It turns out that planned mu -> e conversion experiments would be sensitive to masses as low as 2 MeV. Taking into account other experimental constraints, we show that future mu -> e conversion experiments will be fully relevant to detect or constrain sterile neutrino scenarios in the 2 GeV-1000 TeV mass range.
description: 32 pages 14 figures, references added and some minor precisions; results unchanged
Simplest Neutrino Mixing from S4 Symmetry
Creators: name: Krishnan, R.
name: Harrison, P. F.
name: Scott, W. G.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In 2004, two of us proposed a texture, the "Simplest" neutrino mass matrix, which predicted sin(theta13)=sqrt((2 Solar-Delta m^2)/(3 Atm-Delta m^2)) and delta_CP=90 degrees. Using today's measured values for neutrino mass-squared differences, this prediction gives sin^2(theta13)~0.086+0.003-0.006, compared with a measured value, found by averaging the results of the Daya Bay and RENO experiments, of sin^2(theta13)=0.093+0.010-0.010. Here we present a specific model based on S4 symmetry leading to this successful texture in the context of the type-1 see-saw mechanism, assuming Majorana neutrinos. In this case, slightly different predictions are obtained relating theta13 to the light neutrino masses, which are in accord with current experimental limits and testable at future experiments. Large CP asymmetries remain a generic prediction of the texture.
description: 15 pages, 3 figures, to appear in Journal of High Energy Physics, preprint typeset in JHEP style