cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Attempted density blowup in a freely cooling dilute granular gas: hydrodynamics versus molecular dynamics
Creators: name: Puglisi, Andrea
name: Assaf, Michael
name: Fouxon, Itzhak
name: Meerson, Baruch
Publisher: name: arXiv
Year: 2007
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: It has been recently shown (Fouxon et al. 2007) that, in the framework of ideal granular hydrodynamics (IGHD), an initially smooth hydrodynamic flow of a granular gas can produce an infinite gas density in a finite time. Exact solutions that exhibit this property have been derived. Close to the singularity, the granular gas pressure is finite and almost constant. This work reports molecular dynamics (MD) simulations of a freely cooling gas of nearly elastically colliding hard disks, aimed at identifying the "attempted" density blowup regime. The initial conditions of the simulated flow mimic those of one particular solution of the IGHD equations that exhibits the density blowup. We measure the hydrodynamic fields in the MD simulations and compare them with predictions from the ideal theory. We find a remarkable quantitative agreement between the two over an extended time interval, proving the existence of the attempted blowup regime. As the attempted singularity is approached, the hydrodynamic fields, as observed in the MD simulations, deviate from the predictions of the ideal solution. To investigate the mechanism of breakdown of the ideal theory near the singularity, we extend the hydrodynamic theory by accounting separately for the gradient-dependent transport and for finite density corrections.
description: 11 pages, 9 figures, accepted for publication on Physical Review E
Wind atlas interface and validation with industry data
Creators: name: Badger, J
name: Bauwens, I
name: Hannesdóttir, A
name: Olsen, B
name: Zagar, M
name: Hristov, Y
Publisher: name: Zenodo
Year: 2019
Subjects: wind resource assessment
wind atlas

description: Presentation at the NEWA Final Workshop in Bilbao. Preview of the interface that will provide access to the NEWA wind atlas database and how it has been validated across Europe using data from Vestas while preserving confidentiality.
Measurement-based quantum computation beyond the one-way model
Creators: name: Gross, D.
name: Eisert, J.
name: Schuch, N.
name: Perez-Garcia, D.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We introduce novel schemes for quantum computing based on local measurements on entangled resource states. This work elaborates on the framework established in [Phys. Rev. Lett. 98, 220503 (2007), quant-ph/0609149]. Our method makes use of tools from many-body physics - matrix product states, finitely correlated states or projected entangled pairs states - to show how measurements on entangled states can be viewed as processing quantum information. This work hence constitutes an instance where a quantum information problem - how to realize quantum computation - was approached using tools from many-body theory and not vice versa. We give a more detailed description of the setting, and present a large number of new examples. We find novel computational schemes, which differ from the original one-way computer for example in the way the randomness of measurement outcomes is handled. Also, schemes are presented where the logical qubits are no longer strictly localized on the resource state. Notably, we find a great flexibility in the properties of the universal resource states: They may for example exhibit non-vanishing long-range correlation functions or be locally arbitrarily close to a pure state. We discuss variants of Kitaev's toric code states as universal resources, and contrast this with situations where they can be efficiently classically simulated. This framework opens up a way of thinking of tailoring resource states to specific physical systems, such as cold atoms in optical lattices or linear optical systems.
description: 21 pages, 7 figures
A New All-Sky Catalog of Stars with Large Proper Motions
Creators: name: Lepine, Sebastien
name: Shara, Michael M.
name: Rich, R. Michael
name: Wittenberg, A.
name: Halmo, M.
name: Bongiorno, B.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: A new all-sky catalog of stars with proper motions pm>0.15"/yr is presented. The catalog is largely a product of the SUPERBLINK survey, a data-mining initiative in which the entire Digitized Sky Surveys are searched for moving stellar sources. Findings from earlier proper motions surveys are also incorporated. The new all-sky catalog supersedes the great historic proper motion catalogs assembled by W. J. Luyten (LHS, NLTT), and provides a virtually complete (>98%) census of high proper motion stars down to magnitude R=19.
description: To appear in proceedings of IAU Symposium No. 248 - A Giant Step: from Milli- to Micro-arcsecond Astrometry, Shangai : China (2007)
Phase Transitions and the Perfectness of Fluids
Creators: name: Chen, Jiunn-Wei
name: Huang, Mei
name: Li, Yen-Han
name: Nakano, Eiji
name: Yang, Di-Lun
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Other Condensed Matter (cond-mat.other)
subject: Soft Condensed Matter (cond-mat.soft)
subject: High Energy Physics - Lattice (hep-lat)
subject: Nuclear Experiment (nucl-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We calculate the ratio eta/s, the shear viscosity (eta) to entropy density (s), which characterizes how perfect a fluid is, in weakly coupled real scalar field theories with different types of phase transitions. The mean-field results of the eta/s behaviors agree with the empirical observations in atomic and molecular systems such as water, He, N, and all the matters with data available in the NIST database. These behaviors are expected to be the same in N component scalar theories with an O(N) symmetry. We speculate these eta/s behaviors are general properties of fluid shared by QCD and cold atoms. Finally, we clarify some issues regarding counterexamples of the conjectured universal eta/s bound found in Refs.[16,17].
description: 5 pages, 2 figures; Fig. 2 changed; journal version
Mobility in Semiconducting Graphene Nanoribbons: Phonon, Impurity, and Edge Roughness Scattering
Creators: name: Fang, Tian
name: Konar, Aniruddha
name: Xing, Huili
name: Jena, Debdeep
Publisher: name: arXiv
Year: 2008
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The transport properties of carriers in semiconducting graphene nanoribbons are studied by comparing the effects of phonon, impurity, and line-edge roughness scattering. It is found that scattering from impurities located at the surface of nanoribbons, and from acoustic phonons are as important as line edge roughness scattering. The relative importance of these scattering mechanisms varies with the temperature, Fermi level location, and the width of the ribbons. Based on the analysis, strategies for improvement of low-field mobility are described.
description: 7 pages, 7 figures
Diffusion kinetic parameters from bulk diffusion limited gas release processes
Creators: name: Avila, Ricardo E.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: The diffusion of a bulk absorbed gas species out of spherical pebbles is studied analytically, stressing the usefulness of the time integral of the diffusion coefficient for analysis of arbitrary temperature schedule experiments. Highly accurate approximations are introduced where the numeric evaluation of the analytic expressions takes considerable time. A method is proposed to extract the diffusion kinetic parameters from a single linear heating ramp, namely, the activation energy of the diffusion coefficient and the ratio of the corresponding preexponential factor to the radius of spherical pebbles.
description: Reduced version published as: R. E. Avila Jap. J. Appl. Phys. 43, pp.7205-7206 (2004). (4 pages, 2 Figs.)
Wave Propagation and Diffusive Transition of Oscillations in Pair Plasmas with Dust Impurities
Creators: name: Atamaniuk, Barbara
name: Turski, Andrzej J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: In view of applications to electron-positron pair-plasmas and fullerene pair-ion-plasmas containing charged dust impurities a thorough discussion is given of three-component Plasmas. Space-time responses of multi-component linearized Vlasov plasmas on the basis of multiple integral equations are invoked. An initial-value problem for Vlasov-Poisson -Ampere equations is reduced to the one multiple integral equation and the solution is expressed in terms of forcing function and its space-time convolution with the resolvent kernel. The forcing function is responsible for the initial disturbance and the resolvent is responsible for the equilibrium velocity distributions of plasma species. By use of resolvent equations, time-reversibility, space-reflexivity and the other symmetries are revealed. The symmetries carry on physical properties of Vlasov pair plasmas, e.g., conservation laws. Properly choosing equilibrium distributions for dusty pair plasmas, we can reduce the resolvent equation to: (i) the undamped dispersive wave equations, (ii) wave-diffusive transport equation (iii) and diffusive transport equations of oscillations. In the last case we have to do with anomalous diffusion employing fractional derivatives in time and space. Fractional diffusion equations account for typical anomalous features, which are observed in many systems, e.g. in the case of dispersive transport in amorphous semiconductors, liquid crystals, polymers, proteins and biosystems.
description: 6 pages
Lepton flavor violating $μ\to eγ$ and $μ-e$ conversion in unparticle physics
Creators: name: Ding, Gui-Jun
name: Yan, Mu-Lin
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We have studied lepton flavor violation processes $μ\to eγ$ and $μ-e$ conversion in nuclei induced by unparticle. Both ${\rm Br}(μ\to eγ)$ and $μ-e$ conversion rate ${\rm CR}(μ-e,{\rm Nuclei})$ strongly depend on the scale dimension $d_{\cal U}$ and the unparticle coupling $λ^{ff'}_{\rm K}$(K=V, A, S, P). Present experimental upper bounds on ${\rm Br}(μ\to eγ)$, ${\rm CR}(μ-e,{\rm Ti})$ and ${\rm CR}(μ-e,{\rm Au})$ put stringent constraints on the parameters of unaprticle physics. The scale dimensions $d_{\cal U}$ around 2 are favored for the unparticle scale $Λ_{\cal U}$ of ${\cal O}(10 {\rm TeV})$ and the unparticle coupling of ${\cal O}(10^{-3})$. ${\rm CR}(μ-e,{\rm Nuclei})$ is proportional to $\rm{Z^4_{eff}A^2/Z}$ for the pure vector and scalar couplings between unparticle and SM fermions, this peculiar atomatic number dependence can be used to distinguish unparticle from other theoretical models.
description: 16 pages, 5 figures
Covers of surfaces with fixed branch locus
Creators: name: Edixhoven, Bas
name: de Jong, Robin
name: Schepers, Jan
Publisher: name: arXiv
Year: 2008
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 14E20, 14E22, 14E15

description: Given a connected smooth projective surface X over the complex numbers, together with a simple normal crossings divisor D on it, we study finite normal covers Y of X that are unramified outside D. Given moreover a fibration of X onto a curve C, we prove that the `height' of Y over C is bounded linearly in terms of the degree of Y over X. We indicate how an arithmetic analogue of this result, if true, can be auxiliary in proving the existence of a polynomial time algorithm that computes the mod-l Galois representations associated to a given smooth projective geometrically connected surface over the rational numbers. A precise conjecture is formulated.
description: main result improved and alternative proofs added (both after Esnault-Viehweg); a precise conjecture included for the arithmetic case
Border trees of complex networks
Creators: name: Boas, Paulino R. Villas
name: Rodrigues, Francisco A.
name: Travieso, Gonzalo
name: Costa, Luciano da F.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: The comprehensive characterization of the structure of complex networks is essential to understand the dynamical processes which guide their evolution. The discovery of the scale-free distribution and the small world property of real networks were fundamental to stimulate more realistic models and to understand some dynamical processes such as network growth. However, properties related to the network borders (nodes with degree equal to one), one of its most fragile parts, remain little investigated and understood. The border nodes may be involved in the evolution of structures such as geographical networks. Here we analyze complex networks by looking for border trees, which are defined as the subgraphs without cycles connected to the remainder of the network (containing cycles) and terminating into border nodes. In addition to describing an algorithm for identification of such tree subgraphs, we also consider a series of their measurements, including their number of vertices, number of leaves, and depth. We investigate the properties of border trees for several theoretical models as well as real-world networks.
description: 5 pages, 1 figure, 2 tables. A working manuscript, comments and suggestions welcomed
Anna de Berg, „Nach Galizien“. Entwicklung der Reiseliteratur am Beispiel der deutschsprachigen Reiseberichte vom 18. bis zum 21. Jahrhundert
Creators: name: Mick, Christoph
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2013

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 62 Nr. 1 (2013)
Géza Pálffy, Die Anfänge der Militärkartographie in der Habsburgermonarchie
Creators: name: Sach, Maike
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2012

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 61 Nr. 3 (2012)
Sincronismi giambici: Archiloco, Ipponatte e lo smembramento di Semonide
Creators: name: Ornaghi, Massimiliano
Publisher: name: Annali Online  Lettere - Ferrara
Year: 2012

description: The different numerical data that form the chronographic tradition of  Archilochus could be reconnected to few elements of biographical and  anecdotical tradition of the poet. In particular, the foundation of  Thasos in 15th or 18th Olympiad and the floruit of Archilochus in  23th or, on the other hand, after 26th Olympiad are due to the  connection of the poet with the Lydian king Gyges, mentioned in  Archilochean poetry, and are results of olympiadic conversion of  different relationships: the foundation of Thasos is synchronized with  the start of the reign of Gyges; the floruit in 23th is an approximation of the middle of the reign; the floruit in 26th brings to the end of the reign and so seems to be calculated in  comparison with other historical data (Cimmerian invasions, start of  the reign of Ardys). The floruit in 29th Olympiad is due probably  to an error of the Eusebian tradition. The chronographic traditions of  the other iambic poets (above all Semonides and Hipponax) are  constructed on the grounds of two deductive methods: some data are fixed  - as well as in Archilochean tradition - in connection with historical  people mentioned in Semonidean (maybe) or Hipponactean poetry; some  data, on the contrary, are due to the literary relationship with the  major iambic poet and depend on the creation of poetical canons and  series of poets involved in the development of poetic traditions.
description: Annali Online  Lettere - Ferrara, V 2 (2010)
Michael Hirschfeld, Die Bischofswahlen im Deutschen Reich 1887 bis 1914. Ein Konfliktfeld zwischen Staat und katholischer Kirche vom Ende des Kulturkampfes bis zum Ersten Weltkrieg
Creators: name: Mannert, Pascale
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2014

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 63 Nr. 1 (2014): Grenzen und Räume. Neue Forschungen und Forschungsimpulse
Azimuthal distinguishability of entangled photons generated in spontaneous parametric down-conversion
Creators: name: Osorio, Clara I.
name: Molina-Terriza, Gabriel
name: Font, Blanca G.
name: Torres, Juan P.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We experimentally demonstrate that paired photons generated in different sections of a down-conversion cone, when some of the interacting waves show Poynting vector walk-off, carry different spatial correlations, and therefore a different degree of spatial entanglement. This is shown to be in agreement with theoretical results. We also discuss how this azimuthal distinguishing information of the down-conversion cone is relevant for the implementation of quantum sources aimed at the generation of entanglement in other degrees of freedom, such as polarization.
description: 7 pages, 5 figures, submitted to Opt. Express
Quench dynamics and bulk-edge correspondence in nonlinear mechanical systems
Creators: name: Ezawa, Motohiko
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We study a topological physics in a one-dimensional nonlinear system by taking an instance of a mechanical rotator model with alternating spring constants. This nonlinear model is smoothly connected to an acoustic model described by the Su-Schrieffer-Heeger model in the linear limit. We numerically show that quench dynamics of the kinetic and potential energies for the nonlinear model is well understood in terms of the topological and trivial phases defined in the associated linearized model. It indicates phenomenologically the emergence of the edge state in the topological phase even for the nonlinear system, which may be the bulk-edge correspondence in nonlinear system.
description: 5 pages, 4 figures
Series expansions of the density of states in SU(2) lattice gauge theory
Creators: name: Denbleyker, A.
name: Du, Daping
name: Liu, Yuzhi
name: Meurice, Y.
name: Velytsky, A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We calculate numerically the density of states n(S) for SU(2) lattice gauge theory on $L^4$ lattices. Small volume dependence are resolved for small values of S. We compare $ln(n(S))$ with weak and strong coupling expansions. Intermediate order expansions show a good overlap for values of S corresponding to the crossover. We relate the convergence of these expansions to those of the average plaquette. We show that when known logarithmic singularities are subtracted from $ln(n(S))$, expansions in Legendre polynomials appear to converge and could be suitable to determine the Fisher's zeros of the partition function.
description: revtex, 10 pages, 20 figures, minor errors corected
Luminescence and relaxation measurements on CdIn₂S₄ :Cr³⁺
Creators: name: Orfino, Francesco Paolo
Publisher: name: University of British Columbia
Year: 2010

description: The luminescence and the relaxation rate of CdIn₂S₄ :Cr³⁺ has been investigated. The R-line spectra starts at 12,996 cm⁻¹ and extends to lower energies. The R-line separation at T = 2K was measured to be 30.3 cm⁻¹. Also, the phonon sidebands associated with the R-lines are identified and tabulated. In addition, an energy level scheme for CdIn₂S₄ :Cr³⁺ with the octahedral co-ordinated chromium ion is proposed. No evidence of luminescence due to the tetrahedral co-ordinated chromium ion was observed. The broad peak was found to be composed of various transitions whose relaxation rates were in the range (160-210) μsee. Time-resolution measurements of the R-lines indicated that to within experimental error both lines had the same relaxation rate which was found to be (10.45 ± 0.45) msec.
Janusz Małłek, Opera Selecta. I: Polen und Preussen vom 15. bis zum 18. Jahrhundert. Bestandsaufnahme und Perspektiven
Creators: name: Hartmann, Stefan
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2012

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 61 Nr. 3 (2012)
Rudolf Jaworski u.a. (Hrsg.), Der genormte Blick aufs Fremde. Reiseführer in und über Ostmitteleuropa
Creators: name: Mick, Christoph
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2013

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 62 Nr. 1 (2013)
Evaluating Online Assessment Strategies: A Systematic Review of Reliability and Validity in E-Learning Environments
Creators: name: Ahmed, Mohammed Rebwar
name: Sidiq, Mashkhal Abdalwahid
Publisher: name: Zenodo
Year: 2023

description: This article offers a meticulous exploration of the effectiveness of online assessment methods within digital learning spheres. This systematic review, formulated around the critical question of the reliability and validity of these methods, delves into a comprehensive analysis of 16 meticulously chosen studies from an initial pool of 1500. The research emphasizes the increasing significance of technological evolution in reshaping educational assessment, focusing on adapting digital tools like AI analytics and adaptive testing. Central to the findings is the contextual importance of online assessments in diverse learning environments, influenced by technological infrastructure and student demographics. The review critically examines the challenges in ensuring consistent and accurate evaluations across varying digital platforms, stressing the need for reliable and valid assessments that resonate with real-world skills. Furthermore, the article underscores the critical role of educators in this digital transition, highlighting the necessity for ongoing professional development and community building among teaching professionals. It advocates for inclusive and adaptable assessment strategies that cater to a wide range of learners, including those with special educational needs. Conclusively, the review synthesizes these insights to emphasize the multifaceted nature of online assessment. It calls for a balanced approach that integrates technology's benefits and challenges. The article concludes with a call for continued research and tailored, context-specific assessment strategies, providing valuable guidance for educators, policymakers, and researchers committed to enhancing the quality and equity of digital education.
Carventinae Usinger 1950
Creators: name: Heiss, Ernst
Publisher: name: Zenodo
Year: 2012
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Aradidae

description: Subfamily Carventinae Usinger, 1950
Carventinae Usinger, 1950: 176 (Carventini, as tribe). Type genus: Carventus Stål, 1866.
description: Published as part of Heiss, Ernst, 2012, Annotated catalogue of the flat bug family Aradidae Brullé, 1836 of Madagascar and adjacent islands (Hemiptera: Heteroptera), pp. 45-63 in Zootaxa 3426 (1) on page 48, DOI: 10.11646/zootaxa.3426.1.3, http://zenodo.org/record/214110
Frank Hadler, Matthias Middell (Hrsg.), Verflochtene Geschichten. Ostmitteleuropa
Creators: name: Aust, Martin
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2014

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 63 Nr. 1 (2014): Grenzen und Räume. Neue Forschungen und Forschungsimpulse
Bernhart Jähnig, Verfassung und Verwaltung des Deutschen Ordens und seiner Herrschaft in Livland
Creators: name: Vercamer, Grischa
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2012

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 61 Nr. 3 (2012)
Model of the Weak Reset Process in HfOx Resistive Memory for Deep Learning Frameworks
Creators: name: Majumdar, Atreya
name: Bocquet, Marc
name: Hirtzlin, Tifenn
name: Laborieux, Axel
name: Klein, Jacques-Olivier
name: Nowak, Etienne
name: Vianello, Elisa
name: Portal, Jean-Michel
name: Querlioz, Damien
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: Applied Physics (physics.app-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: The implementation of current deep learning training algorithms is power-hungry, owing to data transfer between memory and logic units. Oxide-based RRAMs are outstanding candidates to implement in-memory computing, which is less power-intensive. Their weak RESET regime, is particularly attractive for learning, as it allows tuning the resistance of the devices with remarkable endurance. However, the resistive change behavior in this regime suffers many fluctuations and is particularly challenging to model, especially in a way compatible with tools used for simulating deep learning. In this work, we present a model of the weak RESET process in hafnium oxide RRAM and integrate this model within the PyTorch deep learning framework. Validated on experiments on a hybrid CMOS/RRAM technology, our model reproduces both the noisy progressive behavior and the device-to-device (D2D) variability. We use this tool to train Binarized Neural Networks for the MNIST handwritten digit recognition task and the CIFAR-10 object classification task. We simulate our model with and without various aspects of device imperfections to understand their impact on the training process and identify that the D2D variability is the most detrimental aspect. The framework can be used in the same manner for other types of memories to identify the device imperfections that cause the most degradation, which can, in turn, be used to optimize the devices to reduce the impact of these imperfections.
Ion Lihaciu, Czernowitz 1848-1918. Das kulturelle Leben einer Provinzmetropole
Creators: name: Surman, Jan
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2014

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 63 Nr. 1 (2014): Grenzen und Räume. Neue Forschungen und Forschungsimpulse
Disk-Planet Interaction Simulations: (I) Baroclinic Generation of Vortensity and Non-Axisymmetric Rossby-Wave-Instability
Creators: name: Ou, Shangli
name: Ji, Jianghui
name: Liu, Lin
name: Peng, Xiaomeng
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We use a multi-dimensional hydrodynamics code to study the gravitational interaction between an embedded planet and a protoplanetary disk with emphasis on the generation of vortensity (potential vorticity) through a Baroclinic Instability and subsequent development of Rossby-Wave-Instability (RWI). It is found that the generation of potential vorticity is very common and effective in non-barotropic disks through the Baroclinic Instability, especially within the coorbital region. Our results also complement previous studies by \citet{KLL03} that non-axisymmetric RWIs are likely to develop at local minima of potential vorticity distribution that are generated by the interaction between a planet and a inviscid barotropic disk. This second instability appears to be very common and robust, regardless of the equation of state, initial density distribution, and rotational law of the disk. The development of RWIs results in non-axisymmetric density blobs, which exert stronger torques onto the planet when they travel in the vicinity of the planet. As a result of that, large amplitude oscillations are introduced to the time behavior of the total torque acted on the planet by the disk. In our current simulations, RWIs do not change the overall picture of inward orbital migration but bring in a non-monotonic behavior to the migration speed. As a side effect, RWIs also introduce interesting structures into the disk. These structures may help the formation of Earth-like planets in the Habitable Zone or Hot Earths interior to a close-in giant planet.
description: ~ 30 pages, Ap. J. in press
title: Negotiating and constructing a reflexive multiliteracies pedagogy in a Greek complementary school in London
Creators: name: Charalambous, Maria
Publisher: name: Goldsmiths, University of London
Year: 2024

description: Research into a multiliteracies pedagogy has become an area of increasing interest in educational settings in the UK and around the world (Giampapa, 2010; Anderson and Macleroy, 2016). Nevertheless, a reflexive multiliteracies pedagogy (Cope and Kalantzis, 2015), which puts the emphasis on the role of the teacher’s reflexivity to leverage on diversity and endorse both multilingualism and multimodality in the curriculum, remains underexplored. To this end, the present study investigates the negotiation and construction of a reflexive multiliteracies pedagogy in a context of increasing diversity, a London Greek Complementary school.

The study takes a collaborative case study approach and uses ethnographic tools to focus on the pedagogic practices of a class of pre-adolescent students and their teacher. Conceptually, the study employs the reflexive multiliteracies pedagogical framework (Cope and Kalantzis, 2015) to explore the knowledge processes of experiencing, conceptualising, analysing and applying, and weavings between them. It illustrates how students deploy these knowledge processes and capitalise with the teacher’s support on their multicultural and multilingual practices, including translanguaging (García and Wei, 2014). In this respect, it highlights criticality and creativity as part of the knowledge processes of analysing and applying and examines the students’ creative text-making in terms of ‘cultural weavings’ (Cazden, 2006a; Luke, 2003) and ‘identity texts’ (Cummins and Early, 2011).

The study extends our understandings of the pedagogic potential of a reflexive multiliteracies framework in the complementary school context. It demonstrates how teachers by being reflexive and attentive to their students’ diversity, can orchestrate pedagogical activities to develop heritage language learning as well as metalinguistic awareness and multicompetence (Cook, 2008; Wei, 2011). It also illustrates how through their text-making, students reproduce but also contest dominant understandings of the heritage language and culture and ‘invest’ themselves (Cummins, 2005a; 2005b) in their learning.
Generalized transformation optics from triple spacetime metamaterials
Creators: name: Bergamin, L.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Optics (physics.optics)
subject: General Physics (physics.gen-ph)
subject: FOS: Physical sciences

description: In this paper various extensions of the design strategy of transformation media are proposed. We show that it is possible to assign different transformed spaces to the field strength tensor (electric field and magnetic induction) and to the excitation tensor (displacement field and magnetic field), resp. In this way, several limitations of standard transformation media can be overcome. In particular it is possible to provide a geometric interpretation of non-reciprocal as well as indefinite materials. We show that these transformations can be complemented by a continuous version of electric-magnetic duality and comment on the relation to the complementary approach of field-transforming metamaterials.
description: 11 pages, 3 figures, v2: typos, new figures, REVTeX, v3: typos, new example added, final version
Sharon Flatto, The Kabbalistic Culture of Eighteenth-Century Prague. Ezekiel Landau (the ‘Noda Biyehudah’) and his Contemporaries. Littman Library of Jewish Civilization
Creators: name: Goldberg, Sylvie Anne
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2013

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 62 Nr. 1 (2013)
Narrowband Spikes Observed during the 2013 November 7 Flare
Creators: name: Karlický, Marian
name: Benáček, Jan
name: Rybák, Ján
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Narrowband spikes are observed in solar flares for several decades. However, their exact origin is still discussed. To contribute to understanding of these spikes, we analyze the narrowband spikes observed in the 800-2000 MHz range during the impulsive phase of the November 7, 2013 flare. In the radio spectrum, the spikes started with typical broadband clouds of spikes, and then their distribution in frequencies changed into unique, very narrow bands having non-integer frequency ratios. We successfully fitted frequencies of these narrow spike bands by those, calculating dispersion branches and growth rates of the Bernstein modes. For comparison, we also analyzed the model, where the narrow bands of spikes are generated at the upper-hybrid frequencies. Using both models, we estimated the plasma density and magnetic field in spike sources. Then the models are discussed, and arguments in favor of the model with the Bernstein modes are presented. Analyzing frequency profiles of this spike event by the Fourier method, we found the power-law spectra with the power-law indices varying in the -0.8 -- -2.75 interval. Because at some times this power-law index was close to the Kolmogorov spectral index (-5/3), we propose that the spikes are generated through the Bernstein modes in turbulent plasma reconnection outflows or directly in the turbulent magnetic reconnection of solar flares.
description: 10 pages, 9 figures
On Point Coverings of Boxes in $\mathbb R^d$
Creators: name: Akopyan, Arseny
Publisher: name: arXiv
Year: 2007
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 68R99

description: Families of boxes in $\mathbb R^d$ are considered. In the paper an upper bound on the size of a minimum transversal in terms of the space dimension and the independence number of the given family was improved.
description: 5 pages, 1 figures
Intracellular Fate and Tuning Cellular Interactions of Carboxylic Acid Functionalised Polymers
Creators: name: Mahmoud, Ayaat Mohamed
Publisher: name: Monash University
Year: 2021
Subjects: subject: 100703 Nanobiotechnology
subject: FOS: Nanotechnology
subject: 91209 Polymers and Plastics
subject: FOS: Materials engineering
subject: 100709 Nanomedicine
subject: 111504 Pharmaceutical Sciences
subject: FOS: Clinical medicine
subject: Biotechnology

description: Synthetic polymers have received increased research interest for their broad range of pharmaceutical applications. In my PhD thesis, we report the synthesis of negatively charged polymers that are cytocompatible with various cell lines. These polymers showed efficient targeting of Mitochondria, the powerhouse of the cell, upon labelling with Cy5 dye. Mitochondria are vital cellular organelles, which have key roles in generating the energy needed for cells survival and regulating cell death in a process known as apoptosis. Therefore, these polymers demonstrate great potential in the delivery of mitochondria therapeutics for treatment of mitochondrial dysfunction-associated diseases, such as Alzheimer’s disease.
Multiple minor mergers: formation of elliptical galaxies and constraints for the growth of spiral disks
Creators: name: Bournaud, Frederic
name: Jog, Chanda J.
name: Combes, Francoise
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Multiple, sequential mergers are unavoidable in the hierarchical build-up picture of galaxies, in particular for the minor mergers that are frequent and highly likely to have occured several times for most present-day galaxies. However, the effect of repeated minor mergers on galactic structure and evolution has not been studied systematically so far. We present a numerical study of multiple, subsequent, minor galaxy mergers, with various mass ratios ranging from 4:1 to 50:1. The N-body simulations include gas dynamics and star formation. We study the morphological and kinematical properties of the remnants, and show that several so-called "minor" mergers can lead to the formation of elliptical-like galaxies that have global morphological and kinematical properties similar to that observed in real elliptical galaxies. The properties of these systems are compared with those of elliptical galaxies produced by the standard scenario of one single major merger. We thus show that repeated minor mergers can theoretically form elliptical galaxies without major mergers, and can be more frequent than major mergers, in particular at moderate redshift. This process must then have formed some elliptical galaxies seen today, and could in particular explain the high boxiness of massive ellipticals, and some fundamental relations observed in ellipticals. In addition, because repeated minor mergers, even at high mass ratios, destroy disks into spheroids, these results indicate that spiral galaxies cannot have grown only by a succession of minor mergers.
description: A&A in press, final version to be published with minor corrections and updated reference list
Spontaneous dissipation of elastic energy by self-localizing thermal runaway
Creators: name: Braeck, S.
name: Podladchikov, Y. Y.
name: Medvedev, S.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Thermal runaway instability induced by material softening due to shear heating represents a potential mechanism for mechanical failure of viscoelastic solids. In this work we present a model based on a continuum formulation of a viscoelastic material with Arrhenius dependence of viscosity on temperature, and investigate the behavior of the thermal runaway phenomenon by analytical and numerical methods. Approximate analytical descriptions of the problem reveal that onset of thermal runaway instability is controlled by only two dimensionless combinations of physical parameters. Numerical simulations of the model independently verify these analytical results and allow a quantitative examination of the complete time evolutions of the shear stress and the spatial distributions of temperature and displacement during runaway instability. Thus we find that thermal runaway processes may well develop under nonadiabatic conditions. Moreover, nonadiabaticity of the unstable runaway mode leads to continuous and extreme localization of the strain and temperature profiles in space, demonstrating that the thermal runaway process can cause shear banding. Examples of time evolutions of the spatial distribution of the shear displacement between the interior of the shear band and the essentially nondeforming material outside are presented. Finally, a simple relation between evolution of shear stress, displacement, shear-band width and temperature rise during runaway instability is given.
description: 16 pages, 7 figures. Extended conclusion; added references
Determinant-free fermionic wave function using feed-forward neural networks
Creators: name: Inui, Koji
name: Kato, Yasuyuki
name: Motome, Yukitoshi
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Machine Learning (cs.LG)
subject: Computational Physics (physics.comp-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: We propose a general framework for finding the ground state of many-body fermionic systems by using feed-forward neural networks. The anticommutation relation for fermions is usually implemented to a variational wave function by the Slater determinant (or Pfaffian), which is a computational bottleneck because of the numerical cost of $O(N^3)$ for $N$ particles. We bypass this bottleneck by explicitly calculating the sign changes associated with particle exchanges in real space and using fully connected neural networks for optimizing the rest parts of the wave function. This reduces the computational cost to $O(N^2)$ or less. We show that the accuracy of the approximation can be improved by optimizing the "variance" of the energy simultaneously with the energy itself. We also find that a reweighting method in Monte Carlo sampling can stabilize the calculation. These improvements can be applied to other approaches based on variational Monte Carlo methods. Moreover, we show that the accuracy can be further improved by using the symmetry of the system, the representative states, and an additional neural network implementing a generalized Gutzwiller-Jastrow factor. We demonstrate the efficiency of the method by applying it to a two-dimensional Hubbard model.
[BINA CC] BINA Quality Control and Data Management Working Group 2024 Update
Creators: name: Strambio-De-Castillia, Caterina
Publisher: name: Zenodo
Year: 2024
Subjects: microscopy
metadata
RDM
data management and sharing
data reuse
bioimaging
BioImaging North America
open science

description: These slides were presented on 9/2428/2024 at the BINA Community Congress in Madison, Wisconsin, United States, during the  Roadmap to Microscopy Data and Metadata Harmonization: challenges and opportunities session.The session was chaired by Dr. Judith Lacoste and included the following speakers:

Caterina Strambio-De-CastilliaBINA Quality Control and Data Management Working Group Update and IntroductionUniversity of Massachusetts Chan Medical School, United States

Mark TsuchidaImage metadata from the hardware perspectiveUniversity of Wisconsin-Madison, WI, USA

Dane Maxfield

The Devil in the Metadata: Essential Elements for Replicating Microscopy Experiments (virtual)

Bruker, USA 

Josh MooreScalable strategies for a next-generation of FAIR bioimaging (virtual)German BioImaging (GerBi)/ Open Microscopy Environment (OME), Germany

The session included a Stakeholders Panel Discussion including Anne Plant, National Institute for Standards and Technology (NIST; virtual), & Roland Nitschke, Director of QUAREP-LiMi (www.quarep.org), University of Friburg, Germany.
Strategie didattiche inclusive: le nuove tecnologie nell’ICF-CY
Creators: name: Chiaro, Marina
Publisher: name: Form@re - Open Journal per la formazione in rete
Year: 2013
Subjects: Inclusione; Tecnologie dell’Informazione e della Comunicazione (TIC); ICF-CY; Comunità di Pratica (CdP)

description: Questa nota illustra i presupposti teorici e la metodologia definita per il progetto di ricerca relativo alla Scuola Dottorale in Pedagogia e Servizio Sociale dell’Università di Roma Tre. La ricerca riguarda la possibilità di valutare quanto la formazione di insegnanti in servizio erogata con modalità blended, ovvero con parziale utilizzo delle nuove tecnologie, su tematiche relative ai Disturbi Specifici di Apprendimento (DSA), possa facilitare la progettazione di strategie didattiche inclusive. Il tema di ricerca ha come quadro concettuale di riferimento il modello dell’International Classification of Functioning, Disability and Health for Children and Youth (ICF-CY) con il capitolo “Prodotti e Tecnologie” inserito nella componente “Fattori Ambientali” della classificazione. L’aspetto della formazione degli insegnanti è stato affrontato riflettendo anche sulla possibilità di costituire e favorire la costituzione delle Comunità di Pratica (CdP).
description: Form@re - Open Journal per la formazione in rete, Vol 13, N° 4: Evidence Based Education: tecnologie per l'apprendimento
A Universal Interacting Crossover Regime in Two-Dimensional Quantum Dots
Creators: name: Murthy, Ganpathy
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Interacting electrons in quantum dots with large Thouless number $g$ in the three classical random matrix symmetry classes are well-understood. When a specific type of spin-orbit coupling known to be dominant in two dimensional semiconductor quantum dots is introduced, we show that a new interacting quantum critical crossover energy scale emerges and low-energy quasiparticles generically have a decay width proportional to their energy. The low-energy physics of this system is an example of a universal interacting crossover regime.
description: 4 pages, 1 figure
Dystonic tics in patients with Gilles de la Tourette syndrome
Creators: name: Szejko, Natalia
name: Jakubczyk, Andrzej
name: Dunalska, Anna
name: Janik, Piotr
Publisher: name: F1000 Research Limited
Year: 2019

description: Background:
Gilles de la Tourette syndrome (GTS) is a childhood onset disorder characterized by motor and vocal tics. Different types of motor tics may occur in GTS, among other, dystonic tics (DTs). Although DTs have been recognized as part of GTS symptomatology, little is known about their risk factors and how often and at which age they appear in affected individuals. The aim of our study was to investigate lifetime prevalence and clinical correlates of DTs in Polish cohort of GTS patients.
Methods:
We performed a prospective, one-registration study in a cohort of 207 consecutive ambulatory patients (mean age 16.5±9.4, 76 adults and 131 children, 162 males) with GTS. Duration of GTS was 9.0±8.0 years (range: 1-39 years). DTs were diagnosed during the interview. DTs were defined as lasting longer than clonic tics, that were characterized by abnormal dystonia-like movements that lead to sustained but  not fixed posture.

Results: DTs occurred at some point in the lifetime of 73.9% (n=153) patients. In 41.2% of patients (n=63) DTs was only present in the past, but not at the time of evaluation. The prevalence of DTs in adults and children was almost the same (p=0.963, 75%, n=57 vs 73.2%, n=96, respectively). Age at onset of DTs was known only in 57% (n=86) of patients with the most frequent onset in children (7-11 years, 74.4%, n=64), followed by adolescence (12-18 years; 17.4%, n=15) and adulthood (≥18 years, 8.1%, n=7). DTs occurred 3.7±4.2 years after the tic onset and mean age of DTs onset was 9.9±5.2 years. On average patients suffered from 1.8±1.7 types of DTs. The most frequent manifestations of DTs were: eyes (tightening resembling blepharospasm 84.3%, n=129 and oculogyric crisis 45.8%, n=70), trunk (dystonic postures 59.5%, n=91), jaw (bruxism 34.6%, n=53), neck (30.7%, n=47), upper limb (26.1%, n=40) and foot (20.9%, n=32). Multivariate logistic regression analysis showed significant associations of DTs with total number of simple and total number of complex tics.

Conclusion: DTs are early and frequent symptoms of GTS. They tend to localize in the face area. DTs occur more frequently in individuals with the higher number of tics and probably add to global impairment caused by tics.
Top BSM at D0
Creators: name: Wicke, Daniel
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The D0 experiment has searched for phenomena beyond the standard model in top quark events. The methods and results of four analyses covering various possible deviations from the standard model behaviour are discussed. With data sets covering up to 2.1fb^-1 no deviation from the standard model expectations could be found.
description: 9 pages, 10 figures, Submitted to the Proceedings of Top2008, 18-24 May 2008, La Biodola, Isola d'Elba, Italy