cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Distributed Grid restoration based on graph theory
Creators: name: Sinha, Ayush
name: Chakrabarti, Sourin
name: Vyas, O. P.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Systems and Control (eess.SY)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: With the emergence of smart grids as the primary means of distribution across wide areas, the importance of improving its resilience to faults and mishaps is increasing. The reliability of a distribution system depends upon its tolerance to attacks and the efficiency of restoration after an attack occurs. This paper proposes a unique approach to the restoration of smart grids under attack by impostors or due to natural calamities via optimal islanding of the grid with primary generators and distributed generators(DGs) into sub-grids minimizing the amount of load shed which needs to be incurred and at the same time minimizing the number of switching operations via graph theory. The minimum load which needs to be shed is computed in the first stage followed by selecting the nodes whose load needs to be shed to achieve such a configuration and then finally deriving the sequence of switching operations required to achieve the configuration. The proposed method is tested against standard IEEE 37-bus and a 1069-bus grid system and the minimum load shed along with the sequencing steps to optimal configuration and time to achieve such a configuration are presented which demonstrates the effectiveness of the method when compared to the existing methods in the field. Moreover, the proposed algorithm can be easily modified to incorporate any other constraints which might arise due to any operational configuration of the grid.
description: IEEE International Symposium on Sustainable Energy, Signal Processing & Cyber Security (IEEE-iSSSC 2020)
A fast learning algorithm for One-Class Slab Support Vector Machines
Creators: name: Kumar, Bagesh
name: Sinha, Ayush
name: Chakrabarti, Sourin
name: Vyas, O. P.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (cs.LG)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: One Class Slab Support Vector Machines (OCSSVM) have turned out to be better in terms of accuracy in certain classes of classification problems than the traditional SVMs and One Class SVMs or even other One class classifiers. This paper proposes fast training method for One Class Slab SVMs using an updated Sequential Minimal Optimization (SMO) which divides the multi variable optimization problem to smaller sub problems of size two that can then be solved analytically. The results indicate that this training method scales better to large sets of training data than other Quadratic Programming (QP) solvers.
description: This version of the manuscript has been updated and is being reviewed by https://www.journals.elsevier.com/knowledge-based-systems
An improved method to derive the kappa distribution in polytropic plasmas
Creators: name: Guo, Ran
Publisher: name: arXiv
Year: 2020
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: This paper studies sufficient conditions for deriving the kappa distribution in polytropic plasmas by an improved method compared with the previous work [R. Guo, Phys. Plasmas \textbf{27}, 122104 (2020)]. We find that the polytropic equation of state can lead to the kappa distribution without any other assumptions in one dimension. In higher dimensions, an extra assumption that the global distribution must only depend on the energy is still needed. In addition, the self-consistence of the electrostatic potential is investigated in such plasmas. The study implies that in single-component plasmas, the potential is constrained by the Lane-Emden equation. However, in two-component plasmas, any arbitrary potential could exist with a suitable background ion density. Finally, we discuss the connections between the kappa distribution and the polytrope.
Orbital selectivity of layer resolved tunneling on iron superconductor Ba0.6K0.4Fe2As2
Creators: name: Yin, J. -X.
name: Wu, X. -X.
name: Li, Jian
name: Wu, Zheng
name: Wang, J. -H.
name: Ting, C. -S.
name: Hor, P. -H.
name: Liang, X. J.
name: Zhang, C. L.
name: Dai, P. C.
name: Wang, X. C.
name: Jin, C. Q.
name: Chen, G. F.
name: Hu, J. P.
name: Wang, Z. -Q.
name: Li, Ang
name: Ding, H.
name: Pan, S. H.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We use scanning tunneling microscopy/spectroscopy (STM/S) to elucidate the Cooper pairing of the iron pnictide superconductor Ba0.6K0.4Fe2As2. By a cold-cleaving technique, we obtain atomically resolved termination surfaces with different layer identities. Remarkably, we observe that the low-energy tunneling spectrum related to superconductivity has an unprecedented dependence on the layer-identity. By cross-referencing with the angle-revolved photoemission results and the tunneling data of LiFeAs, we find that tunneling on each termination surface probes superconductivity through selecting distinct Fe-3d orbitals. These findings imply the real-space orbital features of the Cooper pairing in the iron pnictide superconductors, and propose a new and general concept that, for complex multi-orbital material, tunneling on different terminating layers can feature orbital selectivity.
Substrate usage and energy expenditure during an acute exercise bout after habituation to whole body vibration training
Creators: name: McNichols, Hilary
Publisher: name: University of North Carolina at Chapel Hill
Year: 2011

description: This study examined how whole body vibration training impacts energy expenditure and substrate utilization following eight weeks of core training. Healthy subjects (26, plus or minus 6 yrs) were randomized into a vibration (n = 12) or non-vibration (n = 12) group. Each group participated in identical training but only the vibration group received the vibration stimulus. Metabolic data was collected during the last exercise session. There was no significant difference in energy expenditure (kcal/kg/min) between groups (p = 0.396). However, the vibration intervention group utilized 8.8% more carbohydrates and 8.9% less fat than the non-vibration control group (p < 0.05). While these findings suggest that WBV training may not be an effective exercise intervention for fat utilization, the enhanced carbohydrate utilization suggest it may be beneficial for strength training in healthy recreationally active normal-weight adults.
Edition Nr. 14: Birgit Maria Wolf "Sandkästen" Istanbul 1997
Creators: name: Lindner, Ines
Publisher: name: FKW // Zeitschrift für Geschlechterforschung und visuelle Kultur
Year: 1998

description: FKW // Zeitschrift für Geschlechterforschung und visuelle Kultur, No. 26 (1998): GENUS-REISEN
Multiple lenses of aesthetic response: José Sanchis Sinisterra's El lector por horas
Creators: name: York, Laura H.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2006

description: José Sanchis Sinisterra's play El lector por horas takes the traditional concept of the reader-text relationship within a drama beyond its conventional boundaries through the use of fragmentation and escritura del hueco, or the practice of incorporating only small fragments of another author's text within his own play in order to mold the other text to fit his own devices. By doing so he is refracting the customarily accepted notion that the reader-text relationship is one-on-one. Instead, he filters his borrowed texts through a series of lenses, thereby redirecting them and assigning new meaning. Thus he allows them to appropriately work within his drama. The result is to endow his audience with multiple refractions of the original texts used within the play, thereby redefining the relationship between a text and its receptor. Sanchis has created a fresh perception of the conventional process of reading.
"Endlich, Paris!" - Russische Künstlerinnen der Moderne und der Avantgarde in Paris
Creators: name: Raev, Ada
Publisher: name: FKW // Zeitschrift für Geschlechterforschung und visuelle Kultur
Year: 1998

description: FKW // Zeitschrift für Geschlechterforschung und visuelle Kultur, No. 26 (1998): GENUS-REISEN
Asymptomatic SARS-CoV-2infection: a systematic review and meta-analysis
Creators: name: Sah, Pratha
Publisher: name: Open Science Framework
Year: 2022
Subjects: subject: Medicine and Health Sciences

description: We aim to conduct a systematic review and meta-analysis of COVID-19 literature reporting laboratory-confirmed infections to determine the burden of silent infections, composed of presymptomatic and asymptomatic infections. For both, we aim to remove index cases from our calculations to avoid conflation.
Runaway blue main-sequence stars at high Galactic latitudes. Target selection with Gaia and spectroscopic identification
Creators: name: Raddi, Roberto
name: Irrgang, Andreas
name: Heber, Ulrich
name: Schneider, David
name: Kreuzer, Simon
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Motivated by the historical identification of runaway main-sequence (MS) stars of early spectral type at high Galactic latitudes, we test the capability of Gaia at identifying new such stars. We have selected ~2300 sources with Gaia magnitudes of GBP - GRP < 0.05, compatible with the colors of low-extinction MS stars earlier than mid-A spectral type, and obtained low-resolution optical spectroscopy for 48 such stars. By performing detailed photometric and spectroscopic analyses, we derive their atmospheric and physical parameters (effective temperature, surface gravity, radial velocity, interstellar reddening, spectrophotometric distance, mass, radius, luminosity, and age). The comparison between spectrophotometric and parallax-based distances enables us to disentangle the MS candidates from older blue horizontal branch (BHB) candidates. We identify 12 runaway MS candidates, with masses between 2 and 6 Msun. Their trajectories are traced back to the Galactic disc to identify their most recent Galactic plane crossings and the corresponding flight times. All 12 candidates are ejected from the Galactic disc within 2 to 16.5 kpc from the Galactic center and possess flight times that are shorter than their evolutionary ages, compatible with a runaway hypothesis. Three MS candidates have ejection velocities exceeding 450 km/s, thus, appear to challenge the canonical ejection scenarios for late B-type stars. The fastest star of our sample also has a non-negligible Galactic escape probability if its MS nature can be confirmed. We identify 27 BHB candidates, and the two hottest stars in our sample are rare late O and early B type stars of low mass evolving towards the white dwarf cooling sequence.
description: Accepted for publication in A&A; abbreviated abstract; 16 pages, 13 figures, 5 tables
"Auch ich in Arcadien"? Italiensehnsucht und Italienreisen bildender Künstlerinnen am Beispiel Angelika Kauffmann, Luise Seidler und Clara von Rappard
Creators: name: Muysers, Carola
Publisher: name: FKW // Zeitschrift für Geschlechterforschung und visuelle Kultur
Year: 1998

description: FKW // Zeitschrift für Geschlechterforschung und visuelle Kultur, No. 26 (1998): GENUS-REISEN
Braille to Text Translation for Bengali Language: A Geometric Approach
Creators: name: Kamal, Minhas
name: Ali, Amin Ahsan
name: Khan, Muhammad Asif Hossain
name: Shoyaib, Mohammad
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Braille is the only system to visually impaired people for reading and writing. However, general people cannot read Braille. So, teachers and relatives find it hard to assist them with learning. Almost every major language has software solutions for this translation purpose. However, in Bengali there is an absence of this useful tool. Here, we propose Braille to Text Translator, which takes image of these tactile alphabets, and translates them to plain text. Image deterioration, scan-time page rotation, and braille dot deformation are the principal issues in this scheme. All of these challenges are directly checked using special image processing and geometric structure analysis. The technique yields 97.25% accuracy in recognizing Braille characters.
Wirkliche Geschichte und textualisierte Erfahrung - zur Diskussion um die ethnografische Diskussion
Creators: name: Pritsch, Sylvia
Publisher: name: FKW // Zeitschrift für Geschlechterforschung und visuelle Kultur
Year: 1998

description: FKW // Zeitschrift für Geschlechterforschung und visuelle Kultur, No. 26 (1998): GENUS-REISEN
Metallic ground state in an ion-gated two-dimensional superconductor
Creators: name: Saito, Yu
name: Kasahara, Yuichi
name: Ye, Jianting
name: Iwasa, Yoshihiro
name: Nojima, Tsutomu
Publisher: name: arXiv
Year: 2015
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Recently emerging two-dimensional (2D) superconductors in atomically thin layers and at heterogeneous interfaces are attracting growing interest in condensed matter physics. Here, we report that ion-gated ZrNCl surface, exhibiting a dome-shaped phase diagram with a maximum critical temperature of 14.8 kelvin, behaves as a superconductor persisting to the 2D limit. The superconducting thickness estimated from the upper critical fields is ~ 1.8 nanometers, which is thinner than one-unit-cell. The majority of the vortex phase diagram down to 2 kelvin is occupied by a metallic state with a finite resistance, owing to the quantum creep of vortices caused by extremely weak pinning and diminishing disorder. Our findings highlight the potential of electric-field-induced superconductivity, establishing a new platform for accessing quantum phases in clean 2D superconductors.
description: 33 pages, 10 figures
Das Kodak Girl - eine Ikone der Werbung in Urlaubsstimmung
Creators: name: Lange, Andrea
Publisher: name: FKW // Zeitschrift für Geschlechterforschung und visuelle Kultur
Year: 1998

description: FKW // Zeitschrift für Geschlechterforschung und visuelle Kultur, No. 26 (1998): GENUS-REISEN
Critical Confusion in Selected Studies of Santillana's Prohemio e Carta
Creators: name: Weinberg, Michael
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2010

description: Poetics, like the poems that it explains and informs, is subject to multiple interpretations. Moreover, when it is written by a practitioner of the same art, the poet's prominence may at times obfuscate the true value of his propositions. Such may be the case with the Prohemio e carta of Íñigo López de Mendoza, Marquess of Santillana, whose greatness as a poet often exaggerates the interpretation of the comparatively minor Prohemio. This paper investigates the importance and supposed novelty of the Prohemio with the end of better understanding its place in the literature of the fifteenth century and the place assigned to it by others, considering historical context, literary precedents, and selected examples of contemporary scholarly reception. It concludes that any attempt to establish the true value of the Prohemio e carta for its contemporaries should be based not on its posterior reputation but on its epistolary origins.
Gysin maps, duality and Schubert classes
Creators: name: Darondeau, Lionel
name: Pragacz, Piotr
Publisher: name: arXiv
Year: 2016
Subjects: subject: Algebraic Geometry (math.AG)
subject: Algebraic Topology (math.AT)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 14C17, 14M15, 14N15, 05E05

description: We establish a Gysin formula for Schubert bundles and a strong version of the duality theorem in Schubert calculus on Grassmann bundles. We then combine them to compute the fundamental classes of Schubert bundles in Grassmann bundles, which yields a new proof of the Giambelli formula for vector bundles.
description: Version 3: published version
(Kultureller) Kannibalismus zwischen Wissenschaft und Medienereignis - Reisebilder aus Amerika
Creators: name: Scholz-Hänsel, Michael
Publisher: name: FKW // Zeitschrift für Geschlechterforschung und visuelle Kultur
Year: 1998

description: FKW // Zeitschrift für Geschlechterforschung und visuelle Kultur, No. 26 (1998): GENUS-REISEN
Ionization and Discharges in Gases and Their Effects on Solid Insulation
Creators: name: Opoku, Roland Robert
Publisher: name: London South Bank University
Year: 1975

description: The thesis surveys the basic requirements and properties of insulating materials with particular attention to the mechanisms of breakdown of gases and solids. Investigations of pre-breakdown discharges in gases between uniform field electrodes are reported in Section V and a preliminary study of degradation and breakdown of polymer film, when exposed to internal discharges, in Section VI.
A unifying algebraic framework for discontinuous Galerkin and flux reconstruction methods based on the summation-by-parts property
Creators: name: Montoya, Tristan
name: Zingg, David W.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Numerical Analysis (math.NA)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 65M12, 65M60, 65M70

description: We propose a unifying framework for the matrix-based formulation and analysis of discontinuous Galerkin (DG) and flux reconstruction (FR) methods for conservation laws on general unstructured grids. Within such an algebraic framework, the multidimensional summation-by-parts (SBP) property is used to establish the discrete equivalence of strong and weak formulations, as well as the conservation and energy stability properties of a broad class of DG and FR schemes. Specifically, the analysis enables the extension of the equivalence between the strong and weak forms of the discontinuous Galerkin collocation spectral-element method demonstrated by Kopriva and Gassner (J Sci Comput 44:136-155, 2010) to more general nodal and modal DG formulations, as well as to the Vincent-Castonguay-Jameson-Huynh (VCJH) family of FR methods. Moreover, new algebraic proofs of conservation and energy stability for DG and VCJH schemes with respect to suitable quadrature rules and discrete norms are presented, in which the SBP property serves as a unifying mechanism for establishing such results. Numerical experiments are provided for the two-dimensional linear advection and Euler equations, highlighting the design choices afforded for methods within the proposed framework and corroborating the theoretical analysis.
description: 41 pages, 4 figures
Shear-shape cocycles for measured laminations and ergodic theory of the earthquake flow
Creators: name: Calderon, Aaron
name: Farre, James
Publisher: name: arXiv
Year: 2021
Subjects: subject: Geometric Topology (math.GT)
subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics

description: We extend Mirzakhani's conjugacy between the earthquake and horocycle flows to a bijection, demonstrating conjugacies between these flows on all strata and exhibiting an abundance of new ergodic measures for the earthquake flow. The structure of our map indicates a natural extension of the earthquake flow to an action of the the upper-triangular subgroup P < SL(2,R) and we classify the ergodic measures for this action as pullbacks of affine measures on the bundle of quadratic differentials. Our main tool is a generalization of the shear coordinates of Bonahon and Thurston to arbitrary measured laminations.
description: 90 pages, 29 figures. Final version, to appear in G&T
"Hinaus in die Welt" - Der Aufbruch von deutschen und finnischen Künstlerinnen nach Paris vor der Jahrhundertwende
Creators: name: Wolff-Thomsen, Ulrike
Publisher: name: FKW // Zeitschrift für Geschlechterforschung und visuelle Kultur
Year: 1998

description: FKW // Zeitschrift für Geschlechterforschung und visuelle Kultur, No. 26 (1998): GENUS-REISEN
Star cluster formation with stellar feedback and large-scale inflow
Creators: name: Matzner, Christopher D.
name: Jumper, Peter H.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: During star cluster formation, ongoing mass accretion is resisted by stellar feedback in the form of protostellar outflows from the low-mass stars and photo-ionization and radiation pressure feedback from the massive stars. We model the evolution of cluster-forming regions during a phase in which both accretion and feedback are present, and use these models to investigate how star cluster formation might terminate. Protostellar outflows are the strongest form of feedback in low-mass regions, but these cannot stop cluster formation if matter continues to flow in. In more massive clusters, radiation pressure and photo-ionization rapidly clear the cluster-forming gas when its column density is too small. We assess the rates of dynamical mass ejection and of evaporation, while accounting for the important effect of dust opacity on photo-ionization. Our models are consistent with the census of protostellar outflows in NGC 1333 and Serpens South, and with the dust temperatures observed in regions of massive star formation. Comparing observations of massive cluster-forming regions against our model parameter space, and against our expectations for accretion-driven evolution, we infer that massive-star feedback is a likely cause of gas disruption in regions with velocity dispersions less than a few kilometers per second, but that more massive and more turbulent regions are too strongly bound for stellar feedback to be disruptive.
description: 19 pages, 10 figures, accepted by ApJ
Der Kanon der Neuf Preuses - im Schatten der Neun Helden oder autonome Heldinnen? Ingrid Sedlacek: Die Neuf Preuses: Heldinnen des Spätmittelalters. Studien zur Kunst- und Kulturgeschichte Bd. 14, Marburg: Jonas Verlag 1997
Creators: name: Meyer, Sylva Andrea
Publisher: name: FKW // Zeitschrift für Geschlechterforschung und visuelle Kultur
Year: 1998

description: FKW // Zeitschrift für Geschlechterforschung und visuelle Kultur, No. 25 (1998): EINS UND EINS - DAS MACHT ZWEI?
Three-dimensional simulations of super-critical black hole accretion disks --- luminosities, photon trapping and variability
Creators: name: Sadowski, Aleksander
name: Narayan, Ramesh
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present a set of four three-dimensional, general relativistic, radiation MHD simulations of black hole accretion at super-critical mass accretion rates, $\dot{M} > \dot{M}_{\rm Edd}$. We use these simulations to study how disk properties are modified when we vary the black hole mass, the black hole spin, or the mass accretion rate. In the case of a non-rotating black hole, we find that the total efficiency is of order $3\%\dot M c^2$, approximately a factor of two less than the efficiency of a standard thin accretion disk. The radiation flux in the funnel along the axis is highly super-Eddington, but only a small fraction of the energy released by accretion escapes in this region. The bulk of the $3\%\dot M c^2$ of energy emerges farther out in the disk, either in the form of photospheric emission or as a wind. In the case of a black hole with a spin parameter of 0.7, we find a larger efficiency of about $8\%\dot M c^2$. By comparing the relative importance of advective and diffusive radiation transport, we show that photon trapping is effective near the equatorial plane. However, near the disk surface, vertical transport of radiation by diffusion dominates. We compare the properties of our fiducial three-dimensional run with those of an equivalent two-dimensional axisymmetric model with a mean-field dynamo. The latter simulation runs nearly 100 times faster than the three-dimensional simulation, and gives very similar results for time-averaged properties of the accretion flow.
description: 19 pages, 16 figures, submitted to MNRAS
Inefficient Driving of Bulk Turbulence by Active Galactic Nuclei in a Hydrodynamic Model of the Intracluster Medium
Creators: name: Reynolds, Christopher S.
name: Balbus, Steven A.
name: Schekochihin, Alexander A.
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Central jetted active galactic nuclei (AGN) appear to heat the core regions of the intracluster medium (ICM) in cooling-core galaxy clusters and groups, thereby preventing a cooling catastrophe. However, the physical mechanism(s) by which the directed flow of kinetic energy is thermalized throughout the ICM core remains unclear. We examine one widely discussed mechanism whereby the AGN induces subsonic turbulence in the ambient medium, the dissipation of which provides the ICM heat source. Through controlled inviscid 3-d hydrodynamic simulations, we verify that explosive AGN-like events can launch gravity waves (g-modes) into the ambient ICM which in turn decay to volume-filling turbulence. In our model, however, this process is found to be inefficient, with less than 1% of the energy injected by the AGN activity actually ending up in the turbulence of the ambient ICM. This efficiency is an order of magnitude or more too small to explain the observations of AGN-feedback in galaxy clusters and groups with short central cooling times. Atmospheres in which the g-modes are strongly trapped/confined have an even lower efficiency since, in these models, excitation of turbulence relies on the g-modes' ability to escape from the center of the cluster into the bulk ICM. Our results suggest that, if AGN-induced turbulence is indeed the mechanism by which the AGN heats the ICM core, its driving may rely on physics beyond that captured in our ideal hydrodynamic model.
description: 11 pages. Accepted for publication in The Astrophysical Journal
A Constant Approximation Algorithm for Scheduling Packets on Line Networks
Creators: name: Even, Guy
name: Medina, Moti
name: Rosén, Adi
Publisher: name: arXiv
Year: 2016
Subjects: subject: Data Structures and Algorithms (cs.DS)
subject: FOS: Computer and information sciences

description: In this paper we improve the approximation ratio for the problem of scheduling packets on line networks with bounded buffers, where the aim is that of maximizing the throughput. Each node in the network has a local buffer of bounded size $B$, and each edge (or link) can transmit a limited number, $c$, of packets in every time unit. The input to the problem consists of a set of packet requests, each defined by a source node, a destination node, and a release time. We denote by $n$ the size of the network. A solution for this problem is a schedule that delivers (some of the) packets to their destinations without violating the capacity constraints of the network (buffers or edges). Our goal is to design an efficient algorithm that computes a schedule that maximizes the number of packets that arrive to their respective destinations. We give a randomized approximation algorithm with constant approximation ratio for the case where $B=Θ(c)$. This improves over the previously best result of $O(\log^* n)$ (Räcke and Rosén, Theory Comput. Syst., 49(4), 2011). Our improvement is based on a new combinatorial lemma that we prove, stating, roughly speaking, that if packets are allowed to stay put in buffers only a limited number of time steps, $2d$, where $d$ is the longest source-destination distance of any input packet, then the cardinality of the optimal solution is decreased by only a constant factor. This claim was not previously known in the directed integral (i.e., unsplittable, zero-one) case, and may find additional applications for routing and scheduling algorithms.
High velocity stars from close interaction of a globular cluster and a super massive black hole
Creators: name: Capuzzo-Dolcetta, R.
name: Fragione, G.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Observations show the presence, in the halo of our Galaxy, of stars moving at velocities so high to require an acceleration mechanism involving the presence of a massive central black hole. Thus, in the frame of a galaxy hosting a supermassive black hole ($10^8$ $M_{\odot}$) we investigated a mechanism for the production of high velocity stars, which was suggested by the results of N-body simulations of the close interaction between a massive, orbitally decayed, globular cluster and the super massive black hole. The high velocity acquired by some stars of the cluster comes from the transfer of gravitational binding energy into kinetic energy of the escaping star originally orbiting around the cluster. After the close interaction with the massive black hole, stars could reach a velocity sufficient to travel in the halo and even overcome the galactic gravitational well, while some of them are just stripped from the globular cluster and start orbiting on precessing loops around the galactic centre.
description: 15 pages, 9 figures, 2 Tables, accepted for publication in MNRAS
Casimir Effect Nearby and Through a Cosmological Wormhole
Creators: name: Santos, A. C. L.
name: Muniz, C. R.
name: Oliveira, L. T.
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In this letter, we investigate the changes in the quantum vacuum energy density of a massless scalar field inside a Casimir cavity that orbits a wormhole, by considering the cosmological model with an isotropic form of the Morris-Thorne wormhole, embedded in the FLRW universe. In this sense, we examine the effects of its global curvature and scale factor in an instant of the cosmic history, besides the influences of the local geometry as well as of inertial forces, on the Casimirenergy density. We also study the behavior of this quantity when each plate is fixed without rotation at the opposite sides of the wormhole throat, at zero and finite temperatures, taking into account the effective distance between the plates through the wormhole throat.
description: 11 pages, 2 figures
Frauenforschung und Ausstellungsdesign - Maria Sibylla Merian. Künstlerin und Naturforscherin 1647-1717. Historisches Museum Frankfurt a.M., 18-12-1997-1.3.1998
Creators: name: Spickernagel, Ellen
Publisher: name: FKW // Zeitschrift für Geschlechterforschung und visuelle Kultur
Year: 1998

description: FKW // Zeitschrift für Geschlechterforschung und visuelle Kultur, No. 25 (1998): EINS UND EINS - DAS MACHT ZWEI?
Competing Identities: The Construction of National Identity in the Republic of Moldova
Creators: name: Ion, Florin Valentin
Publisher: name: University of North Carolina at Chapel Hill
Year: 2013

description: This paper discusses the competing processes for national identity construction in the Republic of Moldova between a Moldovan national identity and a Romanian national identity. The paper follows three main theories of national identity construction coined by Keith Darden, David Laitin and Rogers Brubaker and surveys the implementation of mass schooling in interwar Romania, the shift in national identity of Moldova during the Soviet Union and the process of national identity building in independent Moldova. I argue that the group who controls institutions also controls the future identity of the country. The education system is the main creator of national identity and after the collapse of the Soviet Union the Moldovan education system was controlled by the pro-Romanian identity groups. I conclude that the number of Moldovans who self-identify with Romanian language has increased significantly in the last two decades.
Estratégias Educacionais nas Orientações de Alta aos Pacientes com Insuficiência Cardíaca: Um Protocolo de Revisão de Literatura
Creators: name: Gonçalves, Gabriele
Publisher: name: Open Science Framework
Year: 2022
Subjects: subject: Medicine and Health Sciences

description: Revisão integrativa de literatura com o objetivo de evidenciar o impacto das estratégias educacionais adotadas pelos profissionais de enfermagem no planejamento da alta do paciente com insuficiência cardíaca.
The effects of environment on the intrinsic shape of galaxies
Creators: name: Rodríguez, Silvio
name: Padilla, Nelson D.
name: Lambas, Diego García
Publisher: name: arXiv
Year: 2015
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We measure the effect of the environment on the intrinsic shapes of spiral and elliptical galaxies by finding the 3D shape distribution and dust extinction that fits better the projected shape of galaxies in different environment. We find that spiral galaxies in groups are very similar to field spirals with similar intrinsic properties (magnitudes, sizes and colours). But for spirals in groups, those in denser environments or closer to the centre of the group tend to have a more circular disc than similar galaxies in less dense environments or far from the group centres. Also we find that central spiral galaxies in their groups tend to be thinner than other similar spirals. For ellipticals, we do not find any important dependence of their shape on their position in a group or on the local density. However, we find that elliptical galaxies in groups tend to be more spherical than field ellipticals with similar intrinsic properties. We find that, once in groups, the shape of member galaxies do not depend on group mass, regardless of their morphological type.
description: 8 pages, 5 figures, accepted for publication in MNRAS
Leptin densities in amenable groups
Creators: name: Pogorzelski, Felix
name: Richard, Christoph
name: Strungaru, Nicolae
Publisher: name: arXiv
Year: 2021
Subjects: subject: Group Theory (math.GR)
subject: Mathematical Physics (math-ph)
subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: Consider a positive Borel measure on a locally compact group. We define a notion of uniform density for such a measure, which is based on a group invariant introduced by Leptin in 1966. We then restrict to unimodular amenable groups and to translation bounded measures. In that case our density notion coincides with the well-known Beurling density from Fourier analysis, also known as Banach density from dynamical systems theory. We use Leptin densities for a geometric proof of the model set density formula, which expresses the density of a uniform regular model set in terms of the volume of its window, and for a proof of uniform mean almost periodicity of such model sets.
description: 28 pages, introduction rewritten, references added, new Lemma 3.8
Relative Perturbation Theory for Quadratic Hermitian Eigenvalue Problem
Creators: name: Benner, Peter
name: Liang, Xin
name: Miodragović, Suzana
name: Truhar, Ninoslav
Publisher: name: arXiv
Year: 2016
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics
subject: 15A18, 15A42, 65F15, 65F35, 65G99

description: In this paper, we derive new relative perturbation bounds for eigenvectors and eigenvalues for regular quadratic eigenvalue problems of the form $λ^2 M x + λC x + K x = 0$, where $M$ and $K$ are nonsingular Hermitian matrices and $C$ is a general Hermitian matrix. We base our findings on new results for an equivalent regular Hermitian matrix pair $A-λB$. The new bounds can be applied to many interesting quadratic eigenvalue problems appearing in applications, such as mechanical models with indefinite damping. The quality of our bounds is demonstrated by several numerical experiments.
description: 29 pages
Blick zurück nach vorn - Die documenta X zwischen Strenge und Spiel
Creators: name: Hille, Karoline
Publisher: name: FKW // Zeitschrift für Geschlechterforschung und visuelle Kultur
Year: 1998

description: FKW // Zeitschrift für Geschlechterforschung und visuelle Kultur, No. 25 (1998): EINS UND EINS - DAS MACHT ZWEI?
Reasons for action
Creators: name: Tiberio, Anthony
Publisher: name: University of North Carolina at Chapel Hill
Year: 2011

description: What is the correct relation between an agent's motivations for action and his normative reasons for action? Those who think that there is some necessary link between motivating and normative reasons are those who accept an internalist view about normative reasons. Those who reject this idea hold an externalist view about normative reasons. In this paper, I will present, analyze, and address two challenges levied against externalism from internalist perspectives. The result of my analysis will hopefully demonstrate that the first challenge against externalism does not refute externalism, and that there is not sufficient justification for adopting one notion of rationality over another. As a result, part of what is often referred to as the internalism and externalism debate appears to be merely a terminological dispute.
On the Fate of Unstable Circumbinary Planets: Tatooine's Close Encounters with a Death Star
Creators: name: Sutherland, Adam P.
name: Fabrycky, Daniel C.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Circumbinary planets whose orbits become unstable may be ejected, accreted, or even captured by one of the stars. We quantify the relative rates of these channels, for a binary of secondary star's mass fraction 0.1 with an orbit of 1AU. The most common outcome is ejection, which happens ~80% of the time. If binary systems form circumbinary planets readily and sloppily, this process may fill the Milky Way with free-floating planets. A significant fraction of the time, ~20%, the unstable planet strikes the primary or secondary. We tracked whether a Jupiter-like planet would undergo tidal stripping events during close passages, and find that these events are not strong enough to change the trajectory of the planet, though this may be observable from a changed structured for free-floating planets that are produced by this process.
description: 7 pages, 7 figures. ApJ reviewed, awaiting resubmission
"Männlich - weiblich" in der Volkskunde: Berichte vom 31. Kongreß der Deutschen Gesellschaft für Völkerkunde vom 22. bis 26.9.1997 in Marburg
Creators: name: Erwinkel, Irene
name: Merle, Ulla
Publisher: name: FKW // Zeitschrift für Geschlechterforschung und visuelle Kultur
Year: 1998

description: FKW // Zeitschrift für Geschlechterforschung und visuelle Kultur, No. 25 (1998): EINS UND EINS - DAS MACHT ZWEI?
Photoproduction of $J/ψ$ mesons in peripheral and semi-central heavy ion collisions
Creators: name: Kłusek-Gawenda, Mariola
name: Szczurek, Antoni
Publisher: name: arXiv
Year: 2015
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 calculate total and differential cross sections for $J/ψ$ photoproduction in ultrarelativistic lead-lead collisions at the LHC energy $\sqrt{s_{NN}}=2.76$ TeV. In the present approach we use a simple model based on vector dominance picture and multiple scattering of the hadronic ($c \bar c$) state in a cold nucleus as an example. In our analysis we use both the classical mechanics and quantum (Glauber) formulae for calculating $σ_{tot}(J/ψPb)$ which is a building block of our model. We compare our UPC results with ALICE and CMS data. For semi-central collisions ($b
description: 15 pages, 9 figures and 4 tables
Spectrum of weak model sets with Borel windows
Creators: name: Keller, Gerhard
name: Richard, Christoph
name: Strungaru, Nicolae
Publisher: name: arXiv
Year: 2021
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics

description: Consider the extended hull of a weak model set together with its natural shift action. Equip the extended hull with the Mirsky measure, which is a certain natural pattern frequency measure. It is known that the extended hull is a measure-theoretic factor of some group rotation, which is called the underlying torus. Among other results, in the article "Periods and factors of weak model sets" we showed that the extended hull is isomorphic to a factor group of the torus, where certain periods of the window of the weak model set have been factored out. This was proved for weak model sets having a compact window. In this note, we argue that the same results hold for arbitrary measurable and relatively compact windows. Our arguments crucially rely on Moody's work on uniform distribution in model sets. We also discuss implications for the diffraction of such weak model sets and discuss a new class of examples which are generic for the Mirsky measure.
description: 14 pages, v2: title changed, minor adjustments, v3: statements of theorems refined, example class added
Packing Lagrangian tori
Creators: name: Hind, Richard K.
name: Kerman, Ely
Publisher: name: arXiv
Year: 2021
Subjects: subject: Symplectic Geometry (math.SG)
subject: FOS: Mathematics
subject: 53D12

description: In this paper we consider the problem of packing a symplectic manifold with integral Lagrangian tori, that is Lagrangian tori whose area homomorphsims take only integer values. We prove that the Clifford torus in $S^2 \times S^2$ is a maximal integral packing, in the sense that any other integral Lagranian torus must intersect it. In the other direction, we show that in any symplectic polydisk $P(a,b)$ with $a,b>2$, there is at least one integral Lagrangian torus in the complement of the collection of standard product integral Lagrangian tori.
description: 49 pages
Ganz oder gar nicht?! Workshop des Ulmer Vereins für FreiberuflerInnen und solche, die es werden wollen. Resümee
Creators: name: Hanika, Karin
Publisher: name: FKW // Zeitschrift für Geschlechterforschung und visuelle Kultur
Year: 1998

description: FKW // Zeitschrift für Geschlechterforschung und visuelle Kultur, No. 25 (1998): EINS UND EINS - DAS MACHT ZWEI?
The Azimuthal Dependence of Outflows and Accretion Detected Using OVI Absorption
Creators: name: Kacprzak, Glenn G.
name: Muzahid, Sowgat
name: Churchill, Christopher W.
name: Nielsen, Nikole M.
name: Charlton, Jane C.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We report a bimodality in the azimuthal angle ($Φ$) distribution of gas around galaxies traced by OVI absorption. We present the mean $Φ$ probability distribution function of 29 HST-imaged OVI absorbing (EW>0.1A) and 24~non-absorbing (EW<0.1A) isolated galaxies (0.08
description: 12 pages, 8 figures; accepted for publication in ApJ
A Calibration System for Compton Polarimetry at $e^+e^-$ Linear Colliders
Creators: name: Vormwald, Benedikt
name: List, Jenny
name: Vauth, Annika
Publisher: name: arXiv
Year: 2015
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: Polarimetry with permille-level precision is essential for future electron-positron linear colliders. Compton polarimeters can reach negligible statistical uncertainties within seconds of measurement time. The dominating systematic uncertainties originate from the response and alignment of the detector which records the Compton scattered electrons. The robust baseline technology for the Compton polarimeters foreseen at future linear colliders is based on an array of gas Cherenkov detectors read out by photomultipliers. In this paper, we will present a calibration method which promises to monitor nonlinearities in the response of such a detector at the level of a few permille. This method has been implemented in an LED-based calibration system which matches the existing prototype detector. The performance of this calibration system is sufficient to control the corresponding contribution to the total uncertainty on the extracted polarisation to better than $0.1\%$.
description: 27 pages, 17 figures
Sagebrush trees, slant-eyed Santas and Uncle Sam: Christmas at Minidoka Relocation Center
Creators: name: Blankenship, Anne
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2008

description: During the Japanese American internment of World War II, the internees of Minidoka Relocation Center celebrated Christmas with elaborate festivities every year. Christmas became intractably tied to American patriotism throughout the country and within Minidoka during the war. This paper seeks to understand why a community comprised of only a small minority of Christians would celebrate the major holiday of their captors. I show that while some Japanese Americans used Christmas as a way to show solidarity with America during a difficult time, others used the traditional artifacts of the holiday to visually display and protest their poor living conditions and loss of civil rights. The paper systematically examines the material culture of Christmas, particularly cards, gifts, trees and decorations. The analysis of gift giving reveals a complex exchange between internees and the hundreds of church groups outside of the camp that sent presents each Christmas.
Left-Behind Children and Adolescents in the Context of International Migration: A Scoping Review of Evidence from Southeast Asia
Creators: name: Astuti, Yulianti
name: Rumiani
name: Retnowati, Sofia
Publisher: name: Open Science Framework
Year: 2022
Subjects: subject: Clinical Psychology
subject: Developmental Psychology
subject: Social and Behavioral Sciences
subject: Psychology
subject: FOS: Psychology
subject: International Migration
subject: Left-Behind Children and Adolescents
subject: Southeast Asia

description: This scoping review will identify the experiences of left-behind children and adolescents during their parents' migration. We will focus on studies in Southeast Asia.
Algorithms for matrix multiplication via sampling and opportunistic matrix multiplication
Creators: name: Harris, David G.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Data Structures and Algorithms (cs.DS)
subject: FOS: Computer and information sciences

description: Karppa & Kaski (2019) proposed a novel ``broken" or ``opportunistic" matrix multiplication algorithm, based on a variant of Strassen's algorithm, and used this to develop new algorithms for Boolean matrix multiplication, among other tasks. Their algorithm can compute Boolean matrix multiplication in $O(n^{2.778})$ time. While asymptotically faster matrix multiplication algorithms exist, most such algorithms are infeasible for practical problems.
 We describe an alternative way to use the broken multiplication algorithm to approximately compute matrix multiplication, either for real-valued or Boolean matrices. In brief, instead of running multiple iterations of the broken algorithm on the original input matrix, we form a new larger matrix by sampling and run a single iteration of the broken algorithm on it. Asymptotically, our algorithm has runtime $O(n^{2.763})$, a slight improvement over the Karppa-Kaski algorithm.
 Since the goal is to obtain new practical matrix-multiplication algorithms, we also estimate the concrete runtime for our algorithm for some large-scale sample problems. It appears that for these parameters, further optimizations are still needed to make our algorithm competitive.