cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Search for enhanced magnetism at the interface between Bi$_2$Se$_3$ and EuSe
Creators: name: Prokeš, K.
name: Luo, Chen
name: Ryll, H.
name: Schierle, E.
name: Marchenko, D.
name: Weschke, E.
name: Radu, F.
name: Abrudan, R.
name: Volobuev, V. V.
name: Springholz, G.
name: Rader, O.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Enhanced magnetism has recently been reported for the topological-insulator/ferromagnet interface Bi$_2$Se$_3$/EuS with Curie temperatures claimed to be raised above room temperature from the bulk EuS value of 16 K. Here we investigate the analogous interface Bi$_2$Se$_3$/EuSe. EuSe is a low-temperature layered ferrimagnet that is particularly sensitive to external perturbations. We find that superconducting quantum interference device (SQUID) magnetometry of Bi$_2$Se$_3$/EuSe heterostructures reveals precisely the magnetic phase diagram known from EuSe, including the ferrimagnetic phase below 5 K, without any apparent changes from the bulk behavior. Choosing a temperature of 10 K to search for magnetic enhancement, we determine an upper limit for a possible magnetic coercive field of 3 mT. Using interface sensitive x-ray absorption spectroscopy we verify the magnetic divalent configuration of the Eu at the interface without contamination by Eu3+, and by x-ray magnetic circular dichroism (XMCD) we confirm at the interface the magnetic hysteresis obtained by SQUID. XMCD data obtained at 10 K in a magnetic field of 6 T indicate a magnetic spin moment of mz,spin = 7 $μ$B/Eu$^{2+}$, in good agreement with the SQUID data and the expected theoretical moment of Eu2+. Subsequent XMCD measurements in zero field show, however, that sizable remanent magnetization is absent at the interface for temperatures down to about 10 K.
description: 11 figures, 35 references
Ludwika Gajek, Das Breslauer Schauspiel im Spiegel der Tagespresse. Das Lobetheater im ersten Jahrfünft der Weimarer Republik (1918-1923)
Creators: name: Stüben, Jens
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2009

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 58 Nr. 1-2 (2009): Bilder vieler Ausstellungen. Großexpositionen in Ostmitteleuropa als nationale, mediale und soziale Ereignisse
Hélène Leclerc, Une littérature entre deux peuples. Écrivains de langue allemande en Bohême (1815-1848)
Creators: name: Joachimsthaler, Jürgen
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2015

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 64 Nr. 3 (2015): Transpolonität? Gesellschaftliche Eliten in den polnischen Gebieten um 1900 jenseits der Nationalgeschichte(n)
Localization for one-dimensional random potentials with large local fluctuations
Creators: name: Bienaime, Tom
name: Texier, Christophe
Publisher: name: arXiv
Year: 2008
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: We study the localization of wave functions for one-dimensional Schrödinger Hamiltonians with random potentials $V(x)$ with short range correlations and large local fluctuations such that $\int\D{x} \smean{V(x)V(0)}=\infty$. A random supersymmetric Hamiltonian is also considered. Depending on how large the fluctuations of $V(x)$ are, we find either new energy dependences of the localization length, $\ell_\mathrm{loc}\propto{}E/\ln{E}$, $\ell_\mathrm{loc}\propto{}E^{μ/2}$ with $01$, or superlocalization (decay of the wave functions faster than a simple exponential).
description: 9 pages, LaTeX, 2 eps figures ; v2: Refs. added, small paragraph added p.4, additional table in conclusion
MPEC 2024-T27 : 2024 SB8
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2024
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2024 SB8

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Adiabatic following of terahertz surface plasmon-polaritons coupler via two waveguides structure
Creators: name: Huang, Wei
name: Yang, Weifang
name: Yin, Shan
name: Zhang, Wentao
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optics (physics.optics)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: Most recently, two remarkable papers [New J. Phys. 21, 113004 (2019); IEEE J. Sel. Top. Quantum Electron 27, 1 (2020)] propose broadband complete transfer terahertz (THz) surface plasmon polaritons (SPPs) waveguide coupler by applying coherent quantum control -- Stimulated Raman adiabatic passage (STIRAP). However, previous researches request three SPPs waveguides coupler. In this paper, we propose a new design of a broadband complete transfer THz SPPs coupler with an innovative structure of two waveguides by employing two state adiabatic following. In order to realize this design, we introduce the detuning parameter into the coupling equation of SPPs waveguides for the first time. We believe that this finding will improve the THz communication domain.
description: 5 pages, 4 figures. comments welcome
Stephan Scholz, Der deutsche Katholizismus und Polen (1830-1849). Identitätsbildung zwischen konfessioneller Solidarität und antirevolutionärer Abgrenzung
Creators: name: Schattkowsky, Ralph
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2006

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 55 Nr. 2 (2006)
Building the Galilean moons system via pebble accretion and migration: A primordial resonant chain
Creators: name: Madeira, Gustavo
name: Izidoro, André
name: Winter, Silvia M. Giuliatti
Publisher: name: arXiv
Year: 2021
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The origins of the Galilean satellites - namely Io, Europa, Ganymede, and Callisto - is not fully understood yet. Here we use N-body numerical simulations to study the formation of Galilean satellites in a gaseous circumplanetary disk around Jupiter. Our model includes the effects of pebble accretion, gas-driven migration, and gas tidal damping and drag. Satellitesimals in our simulations first grow via pebble accretion and start to migrate inwards. When they reach the trap at the disk inner edge, scattering events and collisions take place promoting additional growth. Growing satellites eventually reach a multi-resonant configuration anchored at the disk inner edge. Our best match to the masses of the Galilean satellites is produced in simulations where the integrated pebble flux is 1e-3 MJ. These simulations typically produce between 3 and 5 satellites. In our best analogues, adjacent satellite pairs are all locked in 2:1 mean motion resonances. However, they have also moderately eccentric orbits (0.1), unlike the current real satellites. We propose that the Galilean satellites system is a primordial resonant chain, similar to exoplanet systems as TRAPPIST-1, Kepler-223, and TOI-178. Callisto was probably in resonance with Ganymede in the past but left this configuration - without breaking the Laplacian resonance - via divergent migration due to tidal planet-satellite interactions. These same effects further damped the orbital eccentricities of these satellites down to their current values (0.001). Our results support the hypothesis that Io and Europa were born with water-ice rich compositions and lost all/most of their water afterwards. Firmer constraints on the primordial compositions of the Galilean satellites are crucial to distinguish formation models.
description: 19 pages, 14 figures
A Novel Estimator of Mutual Information for Learning to Disentangle Textual Representations
Creators: name: Colombo, Pierre
name: Clavel, Chloe
name: Piantanida, Pablo
Publisher: name: arXiv
Year: 2021
Subjects: subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Learning disentangled representations of textual data is essential for many natural language tasks such as fair classification, style transfer and sentence generation, among others. The existent dominant approaches in the context of text data {either rely} on training an adversary (discriminator) that aims at making attribute values difficult to be inferred from the latent code {or rely on minimising variational bounds of the mutual information between latent code and the value attribute}. {However, the available methods suffer of the impossibility to provide a fine-grained control of the degree (or force) of disentanglement.} {In contrast to} {adversarial methods}, which are remarkably simple, although the adversary seems to be performing perfectly well during the training phase, after it is completed a fair amount of information about the undesired attribute still remains. This paper introduces a novel variational upper bound to the mutual information between an attribute and the latent code of an encoder. Our bound aims at controlling the approximation error via the Renyi's divergence, leading to both better disentangled representations and in particular, a precise control of the desirable degree of disentanglement {than state-of-the-art methods proposed for textual data}. Furthermore, it does not suffer from the degeneracy of other losses in multi-class scenarios. We show the superiority of this method on fair classification and on textual style transfer tasks. Additionally, we provide new insights illustrating various trade-offs in style transfer when attempting to learn disentangled representations and quality of the generated sentence.
ARPES, Neutrons, and the High-$T_c$ Mechanism
Creators: name: Lee, Wei-Cheng
name: MacDonald, A. H.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Extensive ARPES and low-energy inelastic neutron scattering studies of cuprate superconductors can be successfully described using a weak-coupling theory in which quasiparticles on a square lattice interact via scalar and spin-dependent effective interactions. In this article we point out that in Bi$_2$Sr$_2$Ca$_{1-x}$Y$_x$Cu$_2$O$_8$ (Bi2212) both probes are consistent with dominant near-neighbour Heisenberg interactions. We discuss the implications of this finding for the mechanism of high-$T_c$ superconductivity.
description: 8 pages, 4 figures, 1 table, submitted. The content is largely expanded
Denis Sdvižkov, Das Zeitalter der Intelligenz. Zur vergleichenden Geschichte der Gebildeten in Europa
Creators: name: Kwaschik, Anne
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2007

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 56 Nr. 1 (2007)
Peter Haslinger, Heidi Hein-Kircher und Rudolf Jaworski (Hrsg.), Heimstätten der Nation. Ostmitteleuropäische Vereins- und Gesellschaftshäuser im transnationalen Vergleich
Creators: name: Grabowski, Sabine
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2015

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 64 Nr. 3 (2015): Transpolonität? Gesellschaftliche Eliten in den polnischen Gebieten um 1900 jenseits der Nationalgeschichte(n)
Strangeness -2 and -3 Baryons in a Constituent Quark Model
Creators: name: Pervin, Muslema
name: Roberts, Winston
Publisher: name: arXiv
Year: 2007
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We apply a quark model developed in earlier work to the spectrum of baryons with strangeness -2 and -3. The model describes a number of well-established baryons successfully, and application to cascade baryons allows the quantum numbers of some known states to be deduced.
description: 11 pages, LaTeX
Andreas Gryphius, Dissertationes funebres oder Leichabdankungen, Hrsg. Von Johann Anselm Steiger
Creators: name: Jähnig, Bernhart
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2009

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 58 Nr. 1-2 (2009): Bilder vieler Ausstellungen. Großexpositionen in Ostmitteleuropa als nationale, mediale und soziale Ereignisse
A full sky, low foreground, high resolution CMB map from WMAP
Creators: name: Delabrouille, J.
name: Cardoso, J. -F.
name: Jeune, M. Le
name: Betoule, M.
name: Fay, G.
name: Guilloux, F.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The WMAP satellite has made available high quality maps of the sky in five frequency bands ranging from 22 to 94 GHz, with the main scientific objective of studying the anisotropies of the Cosmic Microwave Background (CMB). These maps, however, contain a mixture of emissions from various astrophysical origins, superimposed on CMB emission. The objective of the present work is to make a high resolution CMB map in which contamination by such galactic and extra-galactic foregrounds, as well as by instrumental noise, is as low as possible. The method used is an implementation of a constrained linear combination of the channels with minimum error variance, and of Wiener filtering, on a frame of spherical wavelets called needlets, allowing localised filtering in both pixel space and harmonic space. We obtain a low contamination low noise CMB map at the resolution of the WMAP W channel, which can be used for a range of scientific studies. We obtain also a Wiener-filtered version with minimal integrated error. The resulting CMB maps offer significantly better rejection of galactic foregrounds than previous CMB maps from WMAP data. They can be considered as the most precise full-sky CMB temperature maps to-date.
description: Submitted to A&A, 24 pages, 15 figures. For pdf file with full resolution figures, and for data products, see http://www.apc.univ-paris7.fr/APC_CS/Recherche/Adamis/cmb_wmap-en.php
XMM-Newton observation of the persistent Be/neutron-star system X Persei at a high-luminosity level
Creators: name: La Palombara, N.
name: Mereghetti, S.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report on the XMM-Newton observation of the HMXRB X Persei, the prototype of the persistent and low-luminosity Be/neutron star pulsars, which was performed on February 2003. The source was detected at a luminosity level of ~ 1.4x10^35 erg/s, which is the highest level of the latest three decades. The pulsation period has increased up to 839.3 s, thus confirming the overall spin-down of the NS detected in the previous observations. The folded light-curve has a complex structure, with features not observed at lower luminosities, and shows a significant energy dependence. The spectral analysis reveals the presence of a significant excess at low energies over the main power-law spectral component, which can be described by a black-body spectrum of high temperature (kT_BB ~ 1.5 keV) and small emitting region (R_BB ~ 340 m); its properties are consistent with a polar-cap origin. Phase-resolved spectroscopy shows that the emission spectrum varies along the pulse period, but it is not possible to prove whether the thermal component is pulsed or not.
description: 8 pages, 8 figures, 4 tables. Accepted for publication by Astronomy & Astrophysics
A Comment on Bonnor-Steadman Closed Timelike Curves
Creators: name: Rosa, Valeria M.
name: Letelier, Patricio S.
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The existence and stability closed timelike curves in a Bonnor-Ward spacetime without torsion line singularities is shown by exhibiting particular examples.
description: 2 pages, RevTex, minor corrections
On the assumptions leading to the information loss paradox
Creators: name: Buoninfante, Luca
name: Di Filippo, Francesco
name: Mukohyama, Shinji
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The information loss paradox is usually stated as an incompatibility between general relativity and quantum mechanics. However, the assumptions leading to the problem are often overlooked and, in fact, a careful inspection of the main hypothesises suggests a radical reformulation of the problem. Indeed, we present a thought experiment involving a black hole that emits radiation and, independently of the nature of the radiation, we show the existence of an incompatibility between (i) the validity of the laws of general relativity to describe infalling matter far from the Planckian regime, and (ii) the so-called central dogma which states that as seen from an outside observer a black hole behaves like a quantum system whose number of degrees of freedom is proportional to the horizon area. We critically revise the standard arguments in support of the central dogma, and argue that they cannot hold true unless some new physics is invoked even before reaching Planck scales. This suggests that the information loss problem, in its current formulation, is not necessarily related to any loss of information or lack of unitarity. Therefore, in principle, semiclassical general relativity and quantum mechanics can be perfectly compatible before reaching the final stage of the black hole evaporation where, instead, a consistent theory of quantum gravity is needed to make any prediction.
description: 29 pages, 4 figures. v2: minor modifications and references added
Effect of Rb and Cs-doping on superconducting properties of MgB2 thin films
Creators: name: Singh, R K
name: Shen, Y
name: Gandikota, R
name: Wright, D
name: Carvalho, C
name: Rowell, J M
name: Newman, N
Publisher: name: arXiv
Year: 2007
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Our Rutherford backscattering spectrometry (RBS) study has found that concentrations up to 7 atomic percent of Rb and Cs can be introduced to a depth of ~700 A in MgB2 thin films by annealing in quartz ampoules containing elemental alkali metals at <350 degree centigrade. No significant change in transition temperature (Tc) was observed, in contrast to an earlier report of very high Tc (>50 K) for similar experiments on MgB2 powders. The lack of a significant change in Tc and intra-granular carrier scattering suggests that Rb and Cs diffuse into the film, but do not enter the grains. Instead, the observed changes in the electrical properties, including a significant drop in Jc and an increase in delta rho (rho300-rho40), arise from a decrease in inter-granular connectivity due to segregation of the heavy alkaline metals and other impurities (i.e. C and O) introduced into the grain boundary regions during the anneals.
Four-pion production in tau decays and e+e- annihilation: an update
Creators: name: Czyz, Henryk
name: Kuhn, Johann H.
name: Wapienik, Agnieszka
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: An improved description of four-pion production in electron-positron annihilation and in tau lepton decays is presented. The model amplitude is fitted to recent data from BaBar which cover a wide energy range and which were obtained exploiting the radiative return. Predicting tau decay distributions from e+e- data and comparing these predictions with ALEPH and CLEO results, the validity of isospin symmetry is confirmed within the present experimental errors. A good description of two- and three-pion sub-distributions is obtained. Special emphasis is put on the predictions for omega pi (-> pi+pi-pi0) in e+e- annihilation and in tau decay. The model amplitude is implemented in the Monte Carlo generator PHOKHARA.
description: a few typos corrected
Single-electron latch with granular film charge leakage suppressor
Creators: name: Orlov, Alexei O.
name: Luo, Xiangning
name: Yadavalli, Kameshwar K.
name: Beloborodov, Igor S.
name: Snider, Gregory L.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: A single-electron latch is a device that can be used as a building block for Quantum-dot Cellular Automata (QCA) circuits. It consists of three nanoscale metal "dots" connected in series by tunnel junctions; charging of the dots is controlled by three electrostatic gates. One very important feature of a single-electron latch is its ability to store ("latch") information represented by the location of a single electron within the three dots. To obtain latching, the undesired leakage of charge during the retention time must be suppressed. Previously, to achieve this goal, multiple tunnel junctions were used to connect the three dots. However, this method of charge leakage suppression requires an additional compensation of the background charges affecting each parasitic dot in the array of junctions. We report a single-electron latch where a granular metal film is used to fabricate the middle dot in the latch which concurrently acts as a charge leakage suppressor. This latch has no parasitic dots, therefore the background charge compensation procedure is greatly simplified. We discuss the origins of charge leakage suppression and possible applications of granular metal dots for various single-electron circuits.
description: 21 pages, 4 figures
Margret Obladen, Magdeburger Recht auf der Burg zu Krakau. Die güterrechtliche Absicherung der Ehefrau in der Spruchpraxis der Krakauer Oberhofs
Creators: name: Lück, Heiner
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2006

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 55 Nr. 2 (2006)
Efficiency of Producing Random Unitary Matrices with Quantum Circuits
Creators: name: Arnaud, Ludovic
name: Braun, Daniel
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study the scaling of the convergence of several statistical properties of a recently introduced random unitary circuit ensemble towards their limits given by the circular unitary ensemble (CUE). Our study includes the full distribution of the absolute square of a matrix element, moments of that distribution up to order eight, as well as correlators containing up to 16 matrix elements in a given column of the unitary matrices. Our numerical scaling analysis shows that all of these quantities can be reproduced efficiently, with a number of random gates which scales at most as $n_q\log (n_q/ε)$ with the number of qubits $n_q$ for a given fixed precision $ε$. This suggests that quantities which require an exponentially large number of gates are of more complex nature.
description: 18 pages, 10 figures
Wolfgang Stephan Kissel (Hrsg.), Der Osten des Ostens. Orientalismen in slavischen Kulturen und Literaturen
Creators: name: Ritter, Rüdiger
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2015

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 64 Nr. 3 (2015): Transpolonität? Gesellschaftliche Eliten in den polnischen Gebieten um 1900 jenseits der Nationalgeschichte(n)
Shortcuts to Adiabaticity for Open Systems in Circuit Quantum Electrodynamics
Creators: name: Yin, Zelong
name: Li, Chunzhen
name: Allcock, Jonathan
name: Zheng, Yicong
name: Gu, Xiu
name: Dai, Maochun
name: Zhang, Shengyu
name: An, Shuoming
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Shortcuts to adiabaticity (STA) are powerful quantum control methods, allowing quick evolution into target states of otherwise slow adiabatic dynamics. Such methods have widespread applications in quantum technologies, and various STA protocols have been demonstrated in closed systems. However, realizing STA for open quantum systems has presented a greater challenge, due to complex controls required in existing proposals. Here we present the first experimental demonstration of STA for open quantum systems, using a superconducting circuit QED system consisting of two coupled bosonic oscillators and a transmon qubit. By applying a counterdiabatic driving pulse, we reduce the adiabatic evolution time of a single lossy mode from 800 ns to 100 ns. In addition, we propose and implement an optimal control protocol to achieve fast and qubit-unconditional equilibrium of multiple lossy modes. Our results pave the way for accelerating dynamics of open quantum systems and have potential applications in designing fast open-system protocols of physical and interdisciplinary interest, such as accelerating bioengineering and chemical reaction dynamics.
Einführung
Creators: name: Krzoska, Markus
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2008

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 57 Nr. 1 (2008): Freiheitskonzepte im östlichen Europa des Mittelalters und der Frühneuzeit - Klaus Zernack zum 75. Geburtstag
Fluxgate sensors for a spinner magnetometer
Creators: name: Krider, Robert E.
Publisher: name: University of British Columbia
Year: 2010

description: Noise sources in a Schonstedt spinner magnetometer, the primary laboratory instrument used in paleomagnetic research, and various methods for dealing with them are investigated theoretically and experimentally. Based on the results, an instrument is designed and constructed which replaces the Schonstedt sensor and magnetometer with the recently developed University of British Columbia ring core sensor and magnetometer, and the Schonstedt analyzer with an adaptive filter. A 10dB improvement in the signal to noise ratio was achieved in the magnetometer, and a superior method for measuring this signal, using software, is suggested. A technique for faster noise reduction using a time-varying filter is developed analytically.
Energy-Preserving Reduced Operator Inference for Efficient Design and Control
Creators: name: Koike, Tomoki
name: Qian, Elizabeth
Publisher: name: arXiv
Year: 2024
Subjects: subject: Numerical Analysis (math.NA)
subject: Machine Learning (cs.LG)
subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences

description: Many-query computations, in which a computational model for an engineering system must be evaluated many times, are crucial in design and control. For systems governed by partial differential equations (PDEs), typical high-fidelity numerical models are high-dimensional and too computationally expensive for the many-query setting. Thus, efficient surrogate models are required to enable low-cost computations in design and control. This work presents a physics-preserving reduced model learning approach that targets PDEs whose quadratic operators preserve energy, such as those arising in governing equations in many fluids problems. The approach is based on the Operator Inference method, which fits reduced model operators to state snapshot and time derivative data in a least-squares sense. However, Operator Inference does not generally learn a reduced quadratic operator with the energy-preserving property of the original PDE. Thus, we propose a new energy-preserving Operator Inference (EP-OpInf) approach, which imposes this structure on the learned reduced model via constrained optimization. Numerical results using the viscous Burgers' and Kuramoto-Sivashinksy equation (KSE) demonstrate that EP-OpInf learns efficient and accurate reduced models that retain this energy-preserving structure.
description: 17 pages, AIAA SciTech Forum 2024
Cosmological impact of redshift drift measurements
Creators: name: Esteves, J.
name: Martins, C. J. A. P.
name: Pereira, B. G.
name: Alves, C. S.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The redshift drift is a model-independent probe of fundamental cosmology, but choosing a fiducial model one can also use it to constrain the model parameters. We compare the constraining power of redshift drift measurements by the Extremely Large Telescope (ELT), as studied by Liske {\it et al.} (2008), with that of two recently proposed alternatives: the cosmic accelerometer of Eikenberry {\it et al.} (2020), and the differential redshift drift of Cooke (2020). We find that the cosmic accelerometer with a 6-year baseline leads to weaker constraints than those of the ELT (by $60\%$), but with identical time baselines it outperforms the ELT by up to a factor of 6. The differential redshift drift always performs worse that the standard approach if the goal is to constrain the matter density, but it can perform significantly better than it if the goal is to constrain the dark energy equation of state. Our results show that accurately measuring the redshift drift and using these measurements to constrain cosmological parameters are different merit functions: an experiment optimized for one of them will not be optimal for the other. These non-trivial trade-offs must be kept in mind as next generation instruments enter their final design and construction phases.
description: 6 pages, 3 figures, 2 tables; MNRAS Lett. (in press)
Untangling supernova-neutrino oscillations with beta-beam data
Creators: name: Jachowicz, N.
name: McLaughlin, G. C.
name: Volpe, C.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Nuclear Theory (nucl-th)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Recently, we suggested that low-energy beta-beam neutrinos can be very useful for the study of supernova neutrino interactions. In this paper, we examine the use of a such experiment for the analysis of a supernova neutrino signal. Since supernova neutrinos are oscillating, it is very likely that the terrestrial spectrum of supernova neutrinos of a given flavor will not be the same as the energy distribution with which these neutrinos were first emitted. We demonstrate the efficacy of the proposed method for untangling multiple neutrino spectra. This is an essential feature of any model aiming at gaining information about the supernova mechanism, probing proto-neutron star physics, and understanding supernova nucleosynthesis, such as the neutrino process and the r-process. We also consider the efficacy of different experimental approaches including measurements at multiple beam energies and detector configurations.
description: 13 pages, 11 figures, accepted for publication in Phys. Rev. C
Kinetic and hydrodynamic models of chemotactic aggregation
Creators: name: Chavanis, Pierre-Henri
name: Sire, Clement
Publisher: name: arXiv
Year: 2007
Subjects: subject: Biological Physics (physics.bio-ph)
subject: FOS: Physical sciences

description: We derive general kinetic and hydrodynamic models of chemotactic aggregation that describe certain features of the morphogenesis of biological colonies (like bacteria, amoebae, endothelial cells or social insects). Starting from a stochastic model defined in terms of N coupled Langevin equations, we derive a nonlinear mean field Fokker-Planck equation governing the evolution of the distribution function of the system in phase space. By taking the successive moments of this kinetic equation and using a local thermodynamic equilibrium condition, we derive a set of hydrodynamic equations involving a damping term. In the limit of small frictions, we obtain a hyperbolic model describing the formation of network patterns (filaments) and in the limit of strong frictions we obtain a parabolic model which is a generalization of the standard Keller-Segel model describing the formation of clusters (clumps). Our approach connects and generalizes several models introduced in the chemotactic literature. We discuss the analogy between bacterial colonies and self-gravitating systems and between the chemotactic collapse and the gravitational collapse (Jeans instability). We also show that the basic equations of chemotaxis are similar to nonlinear mean field Fokker-Planck equations so that a notion of effective generalized thermodynamics can be developed.
description: In press
Probing $D^*_{s0}(2317)$ in the decays of $B$ to two charmed mesons
Creators: name: Zhang, Zhi-Qing
name: Wang, Meng-Ge
name: Zhao, Yan-Chao
name: Guan, Zhi-Lin
name: Wang, Na
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We probe the inner structure of the meson $D^*_{s0}(2317)$ through the decays of $B_{(s)}$ to two charmed mesons within pQCD approach. Assuming $D^*_{s0}(2317)$ as a scalar meson with $\bar cs$ structure, we find that the predictions for the branching ratios of the decays $B^+\to D^{*+}_{s0}(2317)\bar D^{(*)0}, B^0\to D^{*+}_{s0}(2317)D^{(*)-}$ can explain data within errors. The branching ratios for the decays $B_s\to D^{*+}_{s0}(2317)D_s^{(*)+}$ are estimated to reach up to $10^{-3}$ order, which can be observed by the present LHCb and SuperKEKB experiments. In this work, the decay constant of the meson $D^*_{s0}(2317)$ is an input parameter. Unfortunately, its value has been studied by many references but with large uncertainties. Our calculation shows that a smaller decay constant of the meson $D^*_{s0}(2317)$ is supported by compared with the present data, say $55\sim70$ MeV. We also calculate the ratios $R_1=\frac{Br(B^+\to D^{*+}_{s0}(2317)\bar D^0)}{Br(B^+\to D^{*+}_{s0}(2317)\bar D^{*0})})$ and $R_2=\frac{Br(B^0\to D^{*+}_{s0}(2317)D^-)}{Br(B^0\to D^{*+}_{s0}(2317)D^{*-})}$, which are valuable to determine the inner structure of $D^*_{s0}(2317)$ by compared with the experimental results. Our predictions for the ratios $R_{1,2}$ are consistent with the present data within errors.We expect that these two ratios can be well measured by the future experiments through improving the measurement accuracy for the decays $B^+\to D^{*+}_{s0}(2317)\bar D^{*0}$ and $B^0\to D^{*+}_{s0}(2317)D^{*-}$.
description: 19 pages, 2 figures
Geometrical Rabi oscillations and Landau-Zener transitions in non-Abelian systems
Creators: name: Weisbrich, Hannes
name: Rastelli, Gianluca
name: Belzig, Wolfgang
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Topological phases of matter became a new standard to classify quantum systems in many cases, yet key quantities like the quantum geometric tensor providing local information about topological properties are still experimentally hard to access. In non-Abelian systems this accessibility to geometric properties can be even more restrictive due to the degeneracy of the states. We propose universal protocols to determine quantum geometric properties in non-Abelian systems. First, we show that for a weak resonant driving of the local parameters the coherent Rabi oscillations are related to the quantum geometric tensor. Second, we derive that in a Landau-Zener like transition the final probability of an avoided energy crossing is proportional to elements of the non-Abelian quantum geometric tensor. Our schemes suggest a way to prepare eigenstates of the quantum metric, a task that is difficult otherwise in a degenerate subspace.
Hierarchical Spatial Organization of Geographical Networks
Creators: name: Travencolo, Bruno A. N.
name: Costa, Luciano da F.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: In this work we propose the use of a hirarchical extension of the polygonality index as a means to characterize and model geographical networks: each node is associated with the spatial position of the nodes, while the edges of the network are defined by progressive connectivity adjacencies. Through the analysis of such networks, while relating its topological and geometrical properties, it is possible to obtain important indications about the development dynamics of the networks under analysis. The potential of the methodology is illustrated with respect to synthetic geographical networks.
description: 3 page, 3 figures. A wokring manuscript: suggestions welcomed
Sabine Jagodzińsk, Die Türkenkriege im Spiegel der polnisch-litauischen Adelskultur. Kommemoration und Repräsentation bei den Żółkiewski, Sobieski und Radziwiłł
Creators: name: Srodecki, Paul
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2015

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 64 Nr. 3 (2015): Transpolonität? Gesellschaftliche Eliten in den polnischen Gebieten um 1900 jenseits der Nationalgeschichte(n)
Grenzen. Gesellschaftliche Konstitutionen und Transfigurationen
Creators: name: Bömelburg, Hans-Jürgen
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2007

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 56 Nr. 1 (2007)
Danzig und der Ostseeraum. Sprache, Literatur, Publizistik
Creators: name: Loew, Peter Oliver
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2006

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 55 Nr. 2 (2006)
First-principles study of TMNan (TM= Cr, Mn, Fe, Co, Ni; n = 4-7) clusters
Creators: name: Pradhan, Kalpataru
name: Sen, Prasenjit
name: Reveles, J. Ulises
name: Khanna, Shiv N.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Geometry, electronic structure, and magnetic properties of TMNan (TM=Cr-Ni; n = 4-7) clusters are studied within a gradient corrected density functional theory (DFT) framework. Two complementary approaches, the first adapted to all-electron calculations on free clusters, and the second been on plane wave projector augmented wave (PAW) method within a supercell approach are used. Except for NiNan, the clusters in this series are found to retain the atomic moments of the TM atoms, and the magnetic moment presented an odd-even oscillation with respect to the number of Na atoms. The origin of these odd-even oscillations is explained from the nature of chemical bonding in these clusters. Differences and similarities between the chemical bonding and the magnetic properties of these clusters and the TMNan (TM = Sc, V and Ti; n = 4-6) clusters on one hand, and TM-doped Au and Ag clusters on the other hand, are discussed.
Gewalttaten, Zerstörungen und Verwüstungen von Hab und Gut durch die Rote Armee im ehemaligen Ostpreußen nach dem Zweiten Weltkrieg
Creators: name: Gancewski, Jan
name: Gieszczyński, Witold
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2007

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 56 Nr. 1 (2007)
Mare Balticum. Begegnungen zu Heimat, Geschichte, Kultur an der Ostsee
Creators: name: Bömelburg, Hans-Jürgen
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2006

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 55 Nr. 2 (2006)
Heavy Hexaquarks in the Flux Tube Model
Creators: name: G, Sindhu D
name: Ranjan, Akhilesh
name: Nandan, Hemwati
name: Sharma, V.
Publisher: name: arXiv
Year: 2024
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Hexaquarks are one of the currently emerging topics in both experimental and theoretical high energy physics. Hexaquarks have been examined in relation to particle physics, however, there are still some research and theoretical conjectures surrounding their relationship to dark matter. Due to some experimental discoveries, it has attracted much interest and also resulted in new theoretical models to study the properties of these states. In the present work, Regge trajectories of some hexaquark states are compared with tetraquark and pentaquark states. The study is mainly concentrated on fully heavy hexaquark states. The mass spectra of these hexaquark states have also been investigated and the results are compared with other theoretical works. Our findings agree well with those of other researchers.
description: Preprint of an article submitted for consideration in [Modern Physics Letters A] \c{opyright} [2023] [copyright World Scientific Publishing Company] [https://www.worldscientific.com/worldscinet/mpla]
DEATHSTAR: Nearby AGB stars with the Atacama Compact Array II. CO envelope sizes and asymmetries: The S-type stars
Creators: name: Andriantsaralaza, M.
name: Ramstedt, S.
name: Vlemmings, W. H. T.
name: Danilovich, T.
name: De Beck, E.
name: Groenewegen, M. A. T.
name: Höfner, S.
name: Kerschbaum, F.
name: Khouri, T.
name: Lindqvist, M.
name: Maercker, M.
name: Olofsson, H.
name: Quintana-Lacaci, G.
name: Saberi, M.
name: Sahai, R.
name: Zijlstra, A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We aim to constrain the sizes of the CO circumstellar envelopes (CSEs) of 16 S-type stars, along with an additional 7 and 4 CSEs of C-type and M-type AGB stars, respectively. We map the emission from the CO J=2-1 and 3-2 lines observed with the Atacama Compact Array (ACA) and its total power (TP) antennas, and fit with a Gaussian distribution in the uv- and image planes for ACA-only and TP observations, respectively. The major axis of the fitted Gaussian for the CO(2-1) line data gives a first estimate of the size of the CO-line-emitting CSE. We investigate possible signs of deviation from spherical symmetry by analysing the line profiles, the results from visibility fitting, and by investigating the deconvolved images. The sizes of the CO-line-emitting CSEs of low-mass-loss-rate (low-MLR) S-stars fall between the sizes of the CSEs of C-stars, which are larger, and those of M-stars, which are smaller, as expected because of the differences in their respective CO abundances. The sizes of the low-MLR S-type stars show no dependence on circumstellar density, while a steeper density dependence is observed at high MLR. Furthermore, our results show that the CO CSEs of most of the S-stars in our sample are consistent with a spherically symmetric and smooth outflow. The CO envelope sizes obtained in this paper will be used to constrain detailed radiative transfer modelling to directly determine more accurate MLR estimates for the stars in our sample. For several of our sources that present signs of deviation from spherical symmetry, further high-resolution observations would be necessary to investigate the nature of, and the physical processes behind, these asymmetrical structures. This will provide further insight into the mass-loss process and its related chemistry in S-type AGB stars.
description: 8 pages, 2 figures, 4 appendices, accepted in A&A
Essays in Industrial Organization and Information Technology
Creators: name: Lam, Wing Man Wynne <1983>
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2014
Subjects: SECS-P/06 Economia applicata

description: Chapter 1 studies how consumers’ switching costs affect the pricing and profits of firms competing in two-sided markets such as Apple and Google in the smartphone market. When two-sided markets are dynamic – rather than merely static – I show that switching costs lower the first-period price if network externalities are strong, which is in contrast to what has been found in one-sided markets. By contrast, switching costs soften price competition in the initial period if network externalities are weak and consumers are more patient than the platforms. Moreover, an increase in switching costs on one side decreases the first-period price on the other side.

Chapter 2 examines firms’ incentives to invest in local and flexible resources when demand is uncertain and correlated. I find that market power of the monopolist providing flexible resources distorts investment incentives, while competition mitigates them. The extent of improvement depends critically on demand correlation and the cost of capacity: under social optimum and monopoly, if the flexible resource is cheap, the relationship between investment and correlation is positive, and if it is costly, the relationship becomes negative; under duopoly, the relationship is positive. The analysis also sheds light on some policy discussions in markets such as cloud computing.

Chapter 3 develops a theory of sequential investments in cybersecurity. The regulator can use safety standards and liability rules to increase security. I show that the joint use of an optimal standard and a full liability rule leads to underinvestment ex ante and overinvestment ex post. Instead, switching to a partial liability rule can correct the inefficiencies. This suggests that to improve security, the regulator should encourage not only firms, but also consumers to invest in security.
MSSCM 699 Warehouse Management System (WMS) Project - Gaps in Literature
Creators: name: CSULB CBA Graduate Program
Publisher: name: Zenodo
Year: 2019
Subjects: WMS
SCM
Warehouse Management Systems
Supply Chain Management

description: WMS was a system which was adopted in 1970s by the retail industry and even in 2017, large applicability has been within the retail sector.

MSSCM 699 Warehouse Management System (WMS) Project - Gaps in Literature
description: {"references": ["Alex Parvenov. (2005). Expert Insight: Best Prac=ces in Warehouse Returns. Supply Chain Digest.", "Anonoymous. (2010). RFID in the Warehouse: A Literature Analysis (1995-2010) of its applica=ons, benefits, challenges and future trends. Retrieved from hPps:// research.aston.ac.uk/portal/files/14649038/RFID_in_the_warehouse.pdf", "Anonymous. (2017). Hoovers Inc. Retrieved from First Research : hPp://www.firstresearch.com/ Industry-Research/Automo=ve-Parts-and-Accessories-Stores.html", "Aron, L. J. (1998). Do you need a warehouse management system? Apparel Industry Magazine , 39.", "Azzouz et al. (2011). Remanufactured part core return process and system.", "Bennett, J. (2015, September 15). 5 things to know about the US Auto Parts Industry. Wall Street Journal.", "Bond, J. (2013, June 1). Dock Logis=cs: The Final Fron=er of the modern warehouse. Modern Materials Handling.", "Bond, J. (2014). Integrated warehouse and labor management systems. Modern Materials Handling.", "Boysen.N et al, .. (2015). Part Logistics in the automotive industry: Decision problems, literature review and research agenda. European Journal of Opera=onal Research.", "Porter, M. E. (1985). Compe=tve Advantage: Crea=ng and Sustaining Superior Performance . New York: Free Press.", "Rahul Guhathakurta. (2014, August 24). Automotive Supply Chain Management - A2Z. India.", "RFID Journal. (2017). RFID Journal. Retrieved from https://www.rfidjournal.com/faq/show?84", "McCrea, B. (2013). LMS op=mizing the human supply chain. Modern Materials Handling.", "Pohlen, T. (2013). A framework for evaluating Supply Chain Performance. Journal Of Transportation Management, 4."]}
The all loop AdS4/CFT3 Bethe ansatz
Creators: name: Gromov, Nikolay
name: Vieira, Pedro
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We propose a set of Bethe equations yielding the full asymptotic spectrum of the AdS4/CFT3 duality proposed in arXiv:0806.1218 to all orders in the t'Hooft coupling. These equations interpolate between the 2-loop Bethe ansatz of Minahan and Zarembo arXiv:0806.3951 and the string algebraic curve of arXiv:0807.0437. The several SU(2|2) symmetries of the theory seem to highly constrain the form of the Bethe equations up to a dressing factor whose form we also conjecture.
description: References added. Factor of 2 in the discussion of the (generalized) scaling function fixed