cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
First results from the Herschel Gould Belt Survey in Taurus
Creators: name: Kirk, J. M.
name: Ward-Thompson, D.
name: Palmeirim, P.
name: Andre, Ph.
name: Griffin, M. J.
name: Hargrave, P. J.
name: Konyves, V.
name: Bernard, J. P.
name: Nutter, D. J.
name: Sibthorpe, B.
name: Di Francesco, J.
name: Abergel, A.
name: Arzoumanian, D.
name: Benedettini, M.
name: Bontemps, S.
name: Elia, D.
name: Hennemann, M.
name: Hill, T.
name: Men'shchikov, A.
name: Motte, F.
name: Nguyen-Luong, Q.
name: Peretto, N.
name: Pezzuto, S.
name: Rygl, K. L. J.
name: Sadavoy, S. I.
name: Schisano, E.
name: Schneider, N.
name: Testi, L.
name: White, G.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The whole of the Taurus region (a total area of 52 sq. deg.) has been observed by the Herschel SPIRE and PACS instruments at wavelengths of 70, 160, 250, 350 and 500 μm as part of the Herschel Gould Belt Survey. In this paper we present the first results from the part of the Taurus region that includes the Barnard 18 and L1536 clouds. A new source-finding routine, the Cardiff Source-finding AlgoRithm (CSAR), is introduced, which is loosely based on CLUMPFIND, but that also generates a structure tree, or dendrogram, which can be used to interpret hierarchical clump structure in a complex region. Sources were extracted from the data using the hierarchical version of CSAR and plotted on a mass-size diagram. We found a hierarchy of objects with sizes in the range 0.024-2.7 pc. Previous studies showed that gravitationally bound prestellar cores and unbound starless clumps appeared in different places on the mass-size diagram. However, it was unclear whether this was due to a lack of instrumental dynamic range or whether they were actually two distinct populations. The excellent sensitivity of Herschel shows that our sources fill the gap in the mass-size plane between starless and pre-stellar cores, and gives the first clear supporting observational evidence for the theory that unbound clumps and (gravitationally bound) prestellar cores are all part of the same population, and hence presumably part of the same evolutionary sequence (c.f. Simpson et al. 2011).
description: Accepted to publication by MNRAS, 11 pages, 7 figures. CSAR available from http://star.jmkprime.org/csar
Quantum teleportation in space and frequency using entangled pairs of photons from a frequency comb
Creators: name: Song, Hongbin
name: Yonezawa, Hidehiro
name: Kuntz, Katanya B.
name: Heurs, Michèle
name: Huntington, Elanor H.
Publisher: name: College Park, MD : American Physical Society
Year: 2014
Subjects: subject: Frequency combs
subject: Quantum teleportation
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: Using entangled pairs of photons from a frequency comb and wide-band frequency-resolved homodyne detection, we propose a sequential quantum teleportation protocol for continuous variables that teleports an unknown state in space and frequency. A subthreshold optical parametric oscillator (OPO) produces a comb of entangled pairs of photons separated by the free spectral range of the OPO cavity. Wide-band frequency-resolved homodyne detection enables direct access to the sum and difference of quadratures between different teeth in the comb. Such measurements are Einstein-Podolsky-Rosen nullifiers, and can be used as the basis for teleportation protocols. Our protocol for space-and-frequency teleportation effectively links arbitrary frequency channels for frequency-division multiplexing, which has applications in universal quantum computation and large-capacity quantum communication. © 2014 American Physical Society.
A Quantum Mechanics Analogy for the Nonlinear Schrödinger Equation in the Finite Line
Creators: name: Ramos, Juan I.
name: Villatoro, Francisco R.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: Optics (physics.optics)
subject: FOS: Physical sciences
subject: 35C08, 78A60

description: A quantum mechanics analogy is used to determine the forces acting on and the energies of solitons governed by the nonlinear Schrödinger equation in finite intervals with periodic and with homogeneous Dirichlet, Neumann and Robin boundary conditions. It is shown that the energy densities remain nearly constant for periodic, while they undergo large variations for homogeneous, boundary conditions. The largest variations in the force and energy densities occur for the Neumann boundary conditions, but, for all the boundary conditions considered in this paper, the magnitudes of these forces and energies recover their values prior to the interaction of the soliton with the boundary, after the soliton rebound process is completed. It is also shown that the quantum momentum changes sign but recovers its original value after the collision of the soliton with the boundaries. The asymmetry of the Robin boundary conditions shows different dynamic behaviour at the left and right boundaries of the finite interval.
Supplementary document for Analysis of the optical response of reptile tissues in the visible and UV applying the KKR method - 6687902.pdf
Creators: name: D'Ambrosio, Christian
name: Urquia, Gonzalo
name: Hoelscher, Hendrik
name: Inchaussandague, Marina
name: Skigin, Diana
Publisher: name: Optica Publishing Group
Year: 2023
Subjects: Uncategorized

description: Supplement
title: "Ist doch Design das verlogenste Prinzip, mit dem wir täglich Umgang pflegen."
Creators: name: Walzel, Florian
name: Selle, Gert
Publisher: name: University Library Heidelberg
Year: 2016

description: Ein Interview mit Gert Selle.
Den Briefwechsel führte Florian Walzel im Mai/Juni 2009.
NGC 1252: a high altitude, metal poor open cluster remnant
Creators: name: Marcos, R. de la Fuente
name: Marcos, C. de la Fuente
name: Bidin, C. Moni
name: Carraro, G.
name: Costa, E.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: If stars form in clusters but most stars belong to the field, understanding the details of the transition from the former to the latter is imperative to explain the observational properties of the field. Aging open clusters are one of the sources of field stars. The disruption rate of open clusters slows down with age but, as an object gets older, the distinction between the remaining cluster or open cluster remnant (OCR) and the surrounding field becomes less and less obvious. As a result, finding good OCR candidates or confirming the OCR nature of some of the best candidates still remains elusive. One of these objects is NGC 1252, a scattered group of about 20 stars in Horologium. Here we use new wide-field photometry in the UBVI pass-bands, proper motions from the Yale/San Juan SPM 4.0 catalogue and high resolution spectroscopy concurrently with results from N-body simulations to decipher NGC 1252's enigmatic character. Spectroscopy shows that most of the brightest stars in the studied area are chemically, kinematically and spatially unrelated to each other. However, after analysing proper motions, we find one relevant kinematic group. This sparse object is relatively close (about 1 kpc), metal poor and is probably not only one of the oldest clusters (3 Gyr) within 1.5 kpc from the Sun but also one of the clusters located farthest from the disc, at an altitude of nearly -900 pc. That makes NGC 1252 the first open cluster that can be truly considered a high Galactic altitude OCR: an unusual object that may hint at a star formation event induced on a high Galactic altitude gas cloud. TW Hor and HD 20286 are unlikely to be part of NGC 1252. NGC 1252 17 is identified as an unrelated, Population II cannonball star moving at about 400 km/s.
description: 15 pages, 12 figures, 4 tables, abstract abridged, matches version published in MNRAS
Supplementary document for Ultrafast photo-induced carrier dynamics of perovskite quantum dots during structural degradation - 6672283.pdf
Creators: name: Jo, Cheol
name: Kim, Dokyum
name: Lee, Chang-Lyoul
name: Ko, Do Kyeong
Publisher: name: Optica Publishing Group
Year: 2023
Subjects: Uncategorized

description: supplemental data
Untersuchungen zur Dehalogenierung von Chloraromaten an eisenhaltigen Katalysatoren in der Gasphase
Creators: name: Risser, Alexander
Publisher: name: Hannover : Universität Hannover
Year: 2000
Subjects: subject: Dehalogenation
subject: heterogeneous catalysts
subject: crystalline iron silicates
subject: Chloraromaten
subject: Dehalogenierung
subject: Eisensilicate
subject: Gasphasenreaktion
subject: Heterogene Katalyse
subject: Zeolith ZSM5
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie

description: [no abstract]
A Hierarchical Exact Accelerated Stochastic Simulation Algorithm
Creators: name: Orendorff, David
name: Mjolsness, Eric
Publisher: name: arXiv
Year: 2012
Subjects: subject: Molecular Networks (q-bio.MN)
subject: Computational Engineering, Finance, and Science (cs.CE)
subject: Data Structures and Algorithms (cs.DS)
subject: FOS: Biological sciences
subject: FOS: Computer and information sciences

description: A new algorithm, "HiER-leap", is derived which improves on the computational properties of the ER-leap algorithm for exact accelerated simulation of stochastic chemical kinetics. Unlike ER-leap, HiER-leap utilizes a hierarchical or divide-and-conquer organization of reaction channels into tightly coupled "blocks" and is thereby able to speed up systems with many reaction channels. Like ER-leap, HiER-leap is based on the use of upper and lower bounds on the reaction propensities to define a rejection sampling algorithm with inexpensive early rejection and acceptance steps. But in HiER-leap, large portions of intra-block sampling may be done in parallel. An accept/reject step is used to synchronize across blocks. This method scales well when many reaction channels are present and has desirable asymptotic properties. The algorithm is exact, parallelizable and achieves a significant speedup over SSA and ER-leap on certain problems. This algorithm offers a potentially important step towards efficient in silico modeling of entire organisms.
description: 22 pages, 3 figures
title: Eingang in die Höhle. Die Herausvorderung des (visuellen) Wahrnehmungsrealismus auf dem Gebiet des Interfacedesigns
Creators: name: Lapczyna, Esther Lapczyna
name: Franke, Ingmar S.
name: Groh, Rainer
Publisher: name: University Library Heidelberg
Year: 2016

description: -
Characteristics of Compound Multiplicity in 84^Kr_36 with various light and heavy targets at 1 GeV per nucleon
Creators: name: Chouhan, N. S.
name: Singh, M. K.
name: Singh, V.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Present article focuses on the interactions of 84 Kr 36 having kinetic energy around 1 GeV per nucleon with NIKFI BR2 nuclear emulsion detectors targets, that can reveal important features of some compound multiplicity. The observation showed that the width of the compound multiplicity distributions and value of the mean compound multiplicity have linear relation with the mass number of the projectile as well as colliding system.
description: 13 pages, 5 figures and 2 tables submitted in Indian J of Physics 2013
Potentilla aurea
Creators: name: Becherer
Publisher: name: Zenodo
Year: 1956
Subjects: Biodiversity
Taxonomy

description: P. aurea X verna Cat. 94. Zu streichen.
description: Published as part of Becherer, 1956, Florae Vallesiacae Supplementum, pp. 1-556 in Denkschriften der Schweizerischen Naturforschenden Gesellschaft 71 on pages 1-556
Delay and Doppler Spreads of Non-Stationary Vehicular Channels for Safety Relevant Scenarios
Creators: name: Bernadó, Laura
name: Zemen, Thomas
name: Tufvesson, Fredrik
name: Molisch, Andreas F.
name: Mecklenbräuker, Christoph F.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: Vehicular communication channels are characterized by a non-stationary time- and frequency-selective fading process due to rapid changes in the environment. The non-stationary fading process can be characterized by assuming local stationarity for a region with finite extent in time and frequency. For this finite region the wide-sense stationarity and uncorrelated-scattering (WSSUS) assumption holds approximately and we are able to calculate a time and frequency dependent local scattering function (LSF). In this paper, we estimate the LSF from a large set of measurements collected in the DRIVEWAY'09 measurement campaign, which focuses on scenarios for intelligent transportation systems. We then obtain the time-frequency-varying power delay profile (PDP) and the time-frequency-varying Doppler power spectral density (DSD) from the LSF. Based on the PDP and the DSD, we analyze the time-frequency-varying root mean square (RMS) delay spread and the RMS Doppler spread. We show that the distribution of these channel parameters follows a bi-modal Gaussian mixture distribution. High RMS delay spread values are observed in situations with rich scattering, while high RMS Doppler spreads are obtained in drive-by scenarios.
description: 18 pages, 5 figures, submitted to IEEE Transactions on Vehicular Communications for possible publication
Redes Artísticas: Estudio de etnografía digital de las relaciones de los colectivos, organizaciones y artistas en la red social Instagram.
Creators: name: Barrera Vargas, Heyler Andres
Publisher: name: Zenodo
Year: 2023
Subjects: Redes sociodigitales, Instagram, Objetos culturales, Etnografía digital, Circuitos artísticos.

description: El presente proyecto procura abordar como problema ¿Cómo conocer las relaciones que se generan entre las organizaciones, colectivos y artistas en la red sociodigital Instagram?, por consiguiente, se propone identificar las relaciones y dependencias entre estas entidades artísticas en el entorno digital. Se emplea la metodología de la etnografía digital para observar, escuchar e interpretar las interacciones y experiencias de los usuarios, utilizando herramientas especializadas para recopilar y analizar datos en línea. Donde se destaca la importancia de las plataformas sociodigitales como espacios de difusión y generación de comunidades, así como la influencia de las tecnologías en las prácticas artísticas contemporáneas.
Hyperstructures on Lie algebroids
Creators: name: Antunes, P.
name: da Costa, J. M. Nunes
Publisher: name: arXiv
Year: 2013
Subjects: subject: Symplectic Geometry (math.SG)
subject: Differential Geometry (math.DG)
subject: FOS: Mathematics

description: We define hypersymplectic structures on Lie algebroids recovering, as particular cases, all the classical results and examples of hypersymplectic structures on manifolds. We prove a 1-1 correspondence theorem between hypersymplectic structures and (pseudo-)hyperkähler structures. We show that the hypersymplectic framework is very rich in already known compatible pairs of tensors such as Poisson-Nijenhuis, $ΩN$ and $P Ω$ structures.
Vargula ignitula COHEN & MORIN 1989
Creators: name: Reda, Nicholas J.
name: Morin, James G.
name: Torres, Elizabeth
name: Cohen, Anne C.
name: Schawaroch, Valerie
name: Gerrish, Gretchen A.
Publisher: name: Zenodo
Year: 2019
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Ostracoda
Myodocopida
Cypridinidae
Vargula
Vargula ignitula

description: VARGULA IGNITULA COHEN & MORIN, 1989: 309–310;
TABLE 1; FIGS. 1–13
Morphological diagnosis: (See Table 2; Cohen & Morin, 1989: table 1) In supplement to Cohen & Morin (1989), additional morphological information was collected from deposited specimens: LACM 85-208.1-A, LACM 85-208.1-B, LACM 85-208.1-C, LACM 85-208.1- E. All recorded diagnostic traits are from adult male specimens except when female is explicitly specified – Valve shape: ϴ valve size (c, p) (Cohen & Morin, 1989: figs 1C, D, 2B). Infold (Cohen & Morin, 1989: fig. 4B): ϴ anteroventral row with 13–20 setae (c) (1–3 along incisur); ϴ males (but not females) with posterior edge of RT caudal ridge with transparent triangular spines (c, p).
Male first antenna (Cohen & Morin, 1989: fig. 5B): Seventh article; ϴ b-seta with bulbous base followed by large sucker and two distal filaments, each bearing a tiny projection followed by 4–6 small suckers (N = 16); c-seta slightly more than twice as long with larger basal filament and sucker, with two more distal filaments each bearing proximal projection followed by 3–6 (usually 3 or 4) suckers on proximal filament and 3–6 (usually 4) suckers on distal filament (s) (N = 16).
Second antenna (Cohen & Morin, 1989: fig. 6B): ϴ second exopodial article with ringed terminal seta with 7–11 ventral spines (c, p).
description: Published as part of Reda, Nicholas J., Morin, James G., Torres, Elizabeth, Cohen, Anne C., Schawaroch, Valerie & Gerrish, Gretchen A., 2019, Maristella, a new bioluminescent ostracod genus in the Myodocopida (Cypridinidae), pp. 1078-1118 in Zoological Journal of the Linnean Society 187 on pages 1109-1110
title: Guia de produção de conteúdos digitais acessíveis
Creators: name: Francisco, Manuela Amado
name: Sousa, Norberto
Publisher: name: Politécnico de Leiria
Year: 2019

description: A utilização das TIC está presente em qualquer instituição de ensino, desde o pré-escolar ao pós-graduado. Seja em contexto
 administrativo ou em sala de aula, a disponibilização de conteúdos digitais no seio da comunidade escolar e universitária é
 uma prática comum. A maioria das pessoas utiliza as aplicações mais comuns do Microsoft Office (WORD, POWERPOINT,
 EXCEL) ou do Open-Office (WRITER, IMPRESS, CALC) disponibilizando os ficheiros em formato DOC/ ODT, PPT/ ODP, XLS/ ODS
 ou PDF, sem ter a noção que estes podem não estar acessíveis a todos. Neste sentido, este guia pretende colmatar uma lacuna nesta matéria, na língua portuguesa, apresentando-se como uma
 referência/ ferramenta de trabalho orientadora na produção de conteúdos e difusão do conhecimento.
 Além das principais regras para a produção de documentos em formatos mais comuns, são também apresentadas sugestões
 de procedimentos que visam facilitar a navegação e compreensão da informação, em particular por parte de pessoas cegas.
Contribution to the theory of Pitman estimators
Creators: name: Kagan, Abram M.
name: Yu, Tinghui
name: Barron, Andrew
name: Madiman, Mokshay
Publisher: name: arXiv
Year: 2013
Subjects: subject: Statistics Theory (math.ST)
subject: FOS: Mathematics

description: New inequalities are proved for the variance of the Pitman estimators (minimum variance equivariant estimators) of θconstructed from samples of fixed size from populations F(x-θ). The inequalities are closely related to the classical Stam inequality for the Fisher information, its analog in small samples, and a powerful variance drop inequality. The only condition required is finite variance of F; even the absolute continuity of F is not assumed. As corollaries of the main inequalities for small samples, one obtains alternate proofs of known properties of the Fisher information, as well as interesting new observations like the fact that the variance of the Pitman estimator based on a sample of size n scaled by n monotonically decreases in n. Extensions of the results to the polynomial versions of the Pitman estimators and a multivariate location parameter are given. Also, the search for characterization of equality conditions for one of the inequalities leads to a Cauchy-type functional equation for independent random variables, and an interesting new behavior of its solutions is described.
Relative intrinsic dimensionality is intrinsic to learning
Creators: name: Sutton, Oliver J.
name: Zhou, Qinghua
name: Gorban, Alexander N.
name: Tyukin, Ivan Y.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Machine Learning (cs.LG)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences
subject: 68T09, 68T10

description: High dimensional data can have a surprising property: pairs of data points may be easily separated from each other, or even from arbitrary subsets, with high probability using just simple linear classifiers. However, this is more of a rule of thumb than a reliable property as high dimensionality alone is neither necessary nor sufficient for successful learning. Here, we introduce a new notion of the intrinsic dimension of a data distribution, which precisely captures the separability properties of the data. For this intrinsic dimension, the rule of thumb above becomes a law: high intrinsic dimension guarantees highly separable data. We extend this notion to that of the relative intrinsic dimension of two data distributions, which we show provides both upper and lower bounds on the probability of successfully learning and generalising in a binary classification problem
description: 12 pages, 5 figures
title: »Mit der tschechischen Herkunft Werbung machen, kann bloß Škoda.«
Creators: name: Miklášová, Monika
name: Žižková, Lenka
Publisher: name: University Library Heidelberg
Year: 2016

description: Im Gespräch mit Lenka Žižková.
Das Email-Interview führte Monika Miklášová im Juli 2010.
Beyond relativistic mean-field studies of low-lying states in neutron-deficient krypton isotopes
Creators: name: Fu, Y.
name: Mei, H.
name: Xiang, J.
name: Li, Z. P.
name: Yao, J. M.
name: Meng, J.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Nuclear Theory (nucl-th)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Neutron-deficient krypton isotopes are of particular interest due to the coexistence of oblate and prolate shapes in low-lying states and the transition of ground-state from one dominate shape to another as a function of neutron number. A detailed interpretation of these phenomena in neutron-deficient Kr isotopes requires the use of a method going beyond a mean-field approach that permits to determine spectra and transition probabilities. The aim of this work is to provide a systematic calculation of low-lying state in the even-even 68-86Kr isotopes and to understand the shape coexistence phenomenon and the onset of large collectivity around N=40 from beyond relativistic mean-field studies. The starting point of our method is a set of relativistic mean-field+BCS wave functions generated with a constraint on triaxial deformations (beta, gamma). The excitation energies and electric multipole transition strengths of low-lying states are calculated by solving a five-dimensional collective Hamiltonian (5DCH) with parameters determined by the mean-field wave functions. To examine the role of triaxiality, a configuration mixing of both particle number (PN) and angular momentum (AM) projected axially deformed states is also carried out within the exact generator coordinate method (GCM) based on the same energy density functional. The energy surfaces, the excitation energies of 0^+_2, 2^+_1, 2^+_2 states, as well as the E0 and E2 transition strengths are compared with the results of similar 5DCH calculations but with parameters determined by the non-relativistic mean-field wave functions, as well as with the available data...
description: 23 pages, 10 figures
Evaluación docente del profesorado en retrospectiva: Defectos y virtudes de los sistemas existentes
Creators: name: Rodríguez-Conde, María-José
Publisher: name: Zenodo
Year: 2023
Subjects: Evaluación docente universitaria, DOCENTIA,

description: Vicerrectora de Calidad y Enseñanzas de Grado Universidad de Salamanca Catedrática de Universidad Área de Métodos de Investigación y Diagnóstico en Educación (MIDE) Instituto Universitario de Ciencias de la Educación (IUCE) mjrconde@usal.es (http://orcid.org/0000-0002-2509-1901) http://grial.usal.es
Microscopic and self-consistent description for neutron halo in deformed nuclei
Creators: name: Li, Lulu
name: Meng, Jie
name: Ring, P.
name: Zhao, En-Guang
name: Zhou, Shan-Gui
Publisher: name: arXiv
Year: 2013
Subjects: subject: Nuclear Theory (nucl-th)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: A deformed relativistic Hartree-Bogoliubov theory in continuum has been developed for the study of neutron halos in deformed nuclei and the halo phenomenon in deformed weakly bound nuclei is investigated. Magnesium and neon isotopes are studied and some results are presented for the deformed neutron-rich and weakly bound nuclei 44Mg and 36Ne. The core of the former nucleus is prolate, but the halo has a slightly oblate shape. This indicates a decoupling of the halo orbitals from the deformation of the core. The generic conditions for the existence of halos in deformed nuclei and for the occurrence of this decoupling effect are discussed.
description: 7 pages, 2 figures; invited talk at the XXXV Brazilian Workshop on Nuclear Physics, Sep 2-6, 2012, Maresias, Brazil
Modeling a repository of modules for ports Terminals Operating System (TOS)
Creators: name: Faouzi, Ahmed
name: Mabrouki, Charif
name: Semma, Alami
Publisher: name: arXiv
Year: 2013
Subjects: subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: The purpose of this paper is the modeling of a repository for modules and interfaces that must include all integrated information system management of a port terminal.Modules will provide a basic framework necessary for automatic management of internal operations and activities of all Port Terminals worldwide.
description: 8 pages
Low mass planets in protoplanetary disks with net vertical magnetic fields: the Planetary Wake and Gap Opening
Creators: name: Zhu, Zhaohuan
name: Stone, James M.
name: Rafikov, Roman R.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We study wakes and gap opening by low mass planets in gaseous protoplanetary disks threaded by net vertical magnetic fields which drive magnetohydrodynamical (MHD) turbulence through the magnetorotational instabilty (MRI), using three dimensional simulations in the unstratified local shearing box approximation. The wakes, which are excited by the planets, are damped by shocks similar to the wake damping in inviscid hydrodynamic (HD) disks. Angular momentum deposition by shock damping opens gaps in both MHD turbulent disks and inviscid HD disks even for low mass planets, in contradiction to the "thermal criterion" for gap opening. To test the "viscous criterion", we compared gap properties in MRI-turbulent disks to those in viscous HD disks having the same stress, and found that the same mass planet opens a significantly deeper and wider gap in net vertical flux MHD disks than in viscous HD disks. This difference arises due to the efficient magnetic field transport into the gap region in MRI disks, leading to a larger effective αwithin the gap. Thus, across the gap, the Maxwell stress profile is smoother than the gap density profile, and a deeper gap is needed for the Maxwell stress gradient to balance the planetary torque density. We also confirmed the large excess torque close to the planet in MHD disks, and found that long-lived density features (termed zonal flows) produced by the MRI can affect planet migration. The comparison with previous results from net toroidal flux/zero flux MHD simulations indicates that the magnetic field geometry plays an important role in the gap opening process. Overall, our results suggest that gaps can be commonly produced by low mass planets in realistic protoplanetary disks, and caution the use of a constant α-viscosity to model gaps in protoplanetary disks.
description: Accepted by ApJ, 23 pages, 13 figures. Movie at http://www.astro.princeton.edu/~zhzhu/Site/Movies5.html
A quantum phase transition from triangular to stripe charge order in NbSe$_{2}$
Creators: name: Soumyanarayanan, Anjan
name: Yee, Michael M.
name: He, Yang
name: van Wezel, Jasper
name: Rahn, D. J.
name: Rossnagel, K.
name: Hudson, E. W.
name: Norman, M. R.
name: Hoffman, Jennifer E.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The competition between proximate electronic phases produces a complex phenomenology in strongly correlated systems. In particular, fluctuations associated with periodic charge or spin modulations, known as density waves, may lead to exotic superconductivity in several correlated materials. However, density waves have been difficult to isolate in the presence of chemical disorder, and the suspected causal link between competing density wave orders and high temperature superconductivity is not understood. Here we use scanning tunneling microscopy to image a previously unknown unidirectional (stripe) charge density wave (CDW) smoothly interfacing with the familiar tri-directional (triangular) CDW on the surface of the stoichiometric superconductor NbSe$_2$. Our low temperature measurements rule out thermal fluctuations, and point to local strain as the tuning parameter for this quantum phase transition. We use this discovery to resolve two longstanding debates about the anomalous spectroscopic gap and the role of Fermi surface nesting in the CDW phase of NbSe$_2$. Our results highlight the importance of local strain in governing phase transitions and competing phenomena, and suggest a new direction of inquiry for resolving similarly longstanding debates in cuprate superconductors and other strongly correlated materials.
description: PNAS in press
Arc Statistics
Creators: name: Meneghetti, M.
name: Bartelmann, M.
name: Dahle, H.
name: Limousin, M
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The existence of an arc statistics problem was at the center of a strong debate in the last fifteen years. With the aim to clarify if the optical depth for giant gravitational arcs by galaxy clusters in the so called concordance model is compatible with observations, several studies were carried out which helped to significantly improve our knowledge of strong lensing clusters, unveiling their extremely complex internal structure. In particular, the abundance and the frequency of strong lensing events like gravitational arcs turned out to be a potentially very powerful tool to trace the structure formation. However, given the limited size of observational and theoretical data-sets, the power of arc statistics as a cosmological tool has been only minimally exploited so far. On the other hand, the last years were characterized by significant advancements in the field, and several cluster surveys that are ongoing or planned for the near future seem to have the potential to make arc statistics a competitive cosmological probe. Additionally, recent observations of anomalously large Einstein radii and concentrations in galaxy clusters have reinvigorated the debate on the arc statistics problem. In this paper, we review the work done so far on arc statistics, focussing on what is the lesson we learned and what is likely to improve in the next years.
description: 49 pages, 16 figures. Review paper. Accepted for publication in Space Science Reviews (eds: S. Ettori, M. Meneghetti). This is a product of the work done by an international team at the International Space Science Institute (ISSI) in Bern on "Astrophysics and Cosmology with Galaxy Clusters: the X-ray and Lensing View"
Quantum Machine Learning for Remote Sensing: Exploring potential and challenges
Creators: name: Miroszewski, Artur
name: Nalepa, Jakub
name: Saux, Bertrand Le
name: Mielczarek, Jakub
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: Machine Learning (cs.LG)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: The industry of quantum technologies is rapidly expanding, offering promising opportunities for various scientific domains. Among these emerging technologies, Quantum Machine Learning (QML) has attracted considerable attention due to its potential to revolutionize data processing and analysis. In this paper, we investigate the application of QML in the field of remote sensing. It is believed that QML can provide valuable insights for analysis of data from space. We delve into the common beliefs surrounding the quantum advantage in QML for remote sensing and highlight the open challenges that need to be addressed. To shed light on the challenges, we conduct a study focused on the problem of kernel value concentration, a phenomenon that adversely affects the runtime of quantum computers. Our findings indicate that while this issue negatively impacts quantum computer performance, it does not entirely negate the potential quantum advantage in QML for remote sensing.
description: 2 pages, 2 figures. Presented at the Big Data from Space 2023 conference
CoopInit: Initializing Generative Adversarial Networks via Cooperative Learning
Creators: name: Zhao, Yang
name: Xie, Jianwen
name: Li, Ping
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Image and Video Processing (eess.IV)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Numerous research efforts have been made to stabilize the training of the Generative Adversarial Networks (GANs), such as through regularization and architecture design. However, we identify the instability can also arise from the fragile balance at the early stage of adversarial learning. This paper proposes the CoopInit, a simple yet effective cooperative learning-based initialization strategy that can quickly learn a good starting point for GANs, with a very small computation overhead during training. The proposed algorithm consists of two learning stages: (i) Cooperative initialization stage: The discriminator of GAN is treated as an energy-based model (EBM) and is optimized via maximum likelihood estimation (MLE), with the help of the GAN's generator to provide synthetic data to approximate the learning gradients. The EBM also guides the MLE learning of the generator via MCMC teaching; (ii) Adversarial finalization stage: After a few iterations of initialization, the algorithm seamlessly transits to the regular mini-max adversarial training until convergence. The motivation is that the MLE-based initialization stage drives the model towards mode coverage, which is helpful in alleviating the issue of mode dropping during the adversarial learning stage. We demonstrate the effectiveness of the proposed approach on image generation and one-sided unpaired image-to-image translation tasks through extensive experiments.
description: 9 pages of main text, 2 pages of references
Negative-frequency dispersive wave generation in quadratic media
Creators: name: Conforti, Matteo
name: Westerberg, Niclas
name: Baronio, Fabio
name: Trillo, Stefano
name: Faccio, Daniele
Publisher: name: arXiv
Year: 2013
Subjects: subject: Optics (physics.optics)
subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: We show that the extremely blue-shifted dispersive wave emitted in Kerr media owing to the coupling with the negative-frequency branch [Phys. Rev. Lett. {\bf 108}, 253901 (2012)] can be observed in quadratic media via second-harmonic generation. Not only such phenomenon is thus independent on the specific nonlinear mechanism, but it is shown to occur regardless of the fact that the process is pumped by a pulse which exhibits soliton-like features or, viceversa, undergoes wave-breaking. A simple unified formula gives the frequencies of the emitted dispersive waves in both cases.
Potentilla crantzii
Creators: name: Becherer
Publisher: name: Zenodo
Year: 1956
Subjects: Biodiversity
Taxonomy

description: P. Braimeana X Crantzii Cat. 93. Oberwallis anscheinend häufig (Th. Wolf Lit. cit., S. 561); vgl. hiezu Braun-Blanquet et Thellung l. c. Angeblichferner: 3: Gietroz im Val de Bagnes (Paiche); Nava-Meidenpass(Exk. Soc.Murith.); Zermatt:Schwarzsee (Christ), ob dem Riffel (P.).
description: Published as part of Becherer, 1956, Florae Vallesiacae Supplementum, pp. 1-556 in Denkschriften der Schweizerischen Naturforschenden Gesellschaft 71 on pages 1-556
The most common habitable planets - atmospheric characterization of the subgroup of fast rotators
Creators: name: Pinotti, R.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The current search for habitable planets has focused on Earth-like conditions of mass, volatile content and orbit. However, rocky planets following eccentric orbits, and drier than the Earth, may be a more common phenomenon in the Universe. For the subgroup of fast rotators, it is suggested that their atmospheric thermal capacitance, subject to the radiative forcing of their parent stars, may provide researchers in the near future with a simple method for the determination of a robust lower limit of atmospheric thickness. This technique, together with the spectroscopic analysis of resolved planets from their stars, both allowed by planned space and ground-based observatories with thermal IR capabilities, would enable us with a better understanding of the habitability of this class of planets. The technique works better for smaller orbital periods, but since the tidal lock radius of M dwarfs encompasses their HZ, the optimum targets would be planets around K dwarf stars. The atmospheric thermal capacitance could also expand the range of Habitable Zones for shorter orbits, particularly for planets around M dwarf stars, since the higher frequency of the periodic radiative forcing dampens the surface temperature variation considerably.
description: 10 pages, accepted for publication by MNRAS
Optical and X-ray Properties of CAL 83: I. Quasi-periodic Optical and Supersoft Variability
Creators: name: Rajoelimanana, A. F.
name: Charles, P. A.
name: Meintjes, P. J.
name: Odendaal, A.
name: Udalski, A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We have studied the long-term (~ years) temporal variability of the prototype supersoft X-ray source (SSS) CAL 83 in the LMC, using data from the MACHO and OGLE projects. The CAL 83 light curve exhibits dramatic brightness changes of ~1 mag on timescales of ~450 days, and spends typically ~200 days in the optical low state. Combined with archival XMM-Newton X-ray observations these represent the most extensive X-ray/optical study to date of this system, and reveal in much greater detail that the X-ray light curve is anti-correlated with the optical behaviour. This is remarkably similar to the behaviour of the "transient" SSS, RX J0513.9-6951, where the SSS outbursts recur on a timescale of ~168 days, and also anti-correlate with the optical flux. We performed simple blackbody fits to both high and low state X-ray spectra, and find that the blackbody temperature and luminosity decrease when the optical counterpart brightens. We interpret these long-term variations in terms of the limit-cycle model of Hachisu & Kato (2003a), which provides further support for these systems containing massive (~1.3 Msun) white dwarfs. In addition, we have refined their orbital periods in the MACHO and OGLE-III light curves to values of 1.047529(1) days and 0.762956(5) days for CAL 83 and RX J0513.9-6951, respectively.
description: 9 pages, 8 figures, 3 tables, accepted for publication in MNRAS
Ein psychophysiologisches Gehörmodell zur Nachbildung von Wahrnehmungsschwellen für die Audiocodierung
Creators: name: Baumgarte, Frank
Publisher: name: Hannover : Universität Hannover
Year: 2000
Subjects: subject: Perception model
subject: model of masking
subject: irrelevance reduction
subject: Datenverarbeitung
subject: Hörschwelle
subject: Modellierung
subject: Ohr
subject: Physiologische Psychologie
subject: Tonsignal
subject: Dewey Decimal Classification::600 | Technik::610 | Medizin, Gesundheit
subject: Dewey Decimal Classification::100 | Philosophie::150 | Psychologie

description: [no abstract]
A Consistent Diffusion-Based Algorithm for Semi-Supervised Graph Learning
Creators: name: Bonald, Thomas
name: de Lara, Nathan
Publisher: name: arXiv
Year: 2023
Subjects: subject: Machine Learning (cs.LG)
subject: Social and Information Networks (cs.SI)
subject: FOS: Computer and information sciences

description: The task of semi-supervised classification aims at assigning labels to all nodes of a graph based on the labels known for a few nodes, called the seeds. One of the most popular algorithms relies on the principle of heat diffusion, where the labels of the seeds are spread by thermoconductance and the temperature of each node at equilibrium is used as a score function for each label. In this paper, we prove that this algorithm is not consistent unless the temperatures of the nodes at equilibrium are centered before scoring. This crucial step does not only make the algorithm provably consistent on a block model but brings significant performance gains on real graphs.
description: arXiv admin note: substantial text overlap with arXiv:2008.11944
Effect of Wearing a New Prophylactic Orthosis on Postural Balance
Creators: name: Romain, Julien
name: Arfaoui, Ahlem
name: Bertucci, William
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantitative Methods (q-bio.QM)
subject: FOS: Biological sciences

description: Purpose: The purpose of this study is to evaluate the effect of an innovative prophylactic knee orthosis on postural balance. This prophylactic knee orthosis is designed with a compression that is oriented in a chosen direction. The purpose of this compression is to improve stability in dynamic situations. Orthoses are used to provide functional improvements to knee problems. However, more scientific validation is needed for this type of product. Methods: 20 sportsmen in team sports performed a functional test: the Y-Balance Test. This reliable and reproducible test allows to evaluate the postural balance of the lower limb. The subjects were tested in 3 conditions: prophylactic orthosis with innovative compression, control orthosis (with no compression) and without orthosis. The average of the three trials were collected in each direction and condition. Results: The prophylactic orthosis had a better standardized score in the anterior direction (p<0.05) and a better composite score (p<0.05) than the control orthosis (no compression). However, there were no differences in the normalized score in the other directions. There were no significant differences between the prophylactic orthosis and without orthosis. Conclusion:Wearing the prophylactic orthosis improves postural balance compared to a orthosis with no compression. But there is no difference between the prophylactic orthosis and without orthosis on postural balance.
Propagation of plasmons in designed single crystalline silver nanostructures
Creators: name: Kumar, Shailesh
name: Lu, Ying-Wei
name: Huck, Alexander
name: Andersen, Ulrik L.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Optics (physics.optics)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We demonstrate propagation of plasmons in single crystalline silver nanostructures fabricated using a combination of a bottom-up and a top-down approach. Silver nanoplates of thickness around 65 nm and a surface area of about 100 μm^2 are made using a wet chemical method. Silver nanotips and nanowires are then sculptured by focused ion beam milling. The plasmons are excited by using the fluorescence from the redeposited silver clusters during the milling process. Propagation of plasmons in the nanowires is observed in the visible spectral region. We also observe a cavity effect by measuring the emission spectrum from the distal wire end.
description: 9 pages, 4 figures
Thermal and magnetoelastic effects in magnetic tunnel junction
Creators: name: Yang, Hangfu
Publisher: name: Hannover : Institutionelles Repositorium der Leibniz Universität Hannover
Year: 2018
Subjects: subject: magnetic tunnel juction
subject: spin caloritronics
subject: spin straintronics
subject: femtosecond laser
subject: Femtosekundenlaser
subject: magnetische Tunnelbarrieren
subject: thermische Auswirkungen
subject: magnetoelastische Auswirkungen
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: Heat dissipation in spintronic devices is currently a limiting factor for their further miniaturization, spurring scientists on seeking for more energy friendly mechanisms to manipulate spin. In this work, two new approaches for stimulating local spin or magnetization in a magnetic tunnel junction (MTJ), being a very important and industrially relevant device, are presented. The studies are based on thermal and magnetoelastic effects on the local spin of MTJs with the stimulus of heat pulses and acoustic pulses generated by femtosecond laser pulses. The information of the local spin, being included in the spin dependent electric conductance or resistance of the MTJ, is studied by time resolved and static resistance detection methods. Thereby, optically generated temperature and temperature gradient effects on the spin are considered separately. For the study of temperature effects, the temperature dependence of the resistance of the MTJ is employed. The measured resistance and temperature traces reveal that the resultant resistance change after laser excitation mainly results from temperature effects, which is supported by finite element simulations. Still, the local spin is also influenced by a temperature gradient effect. Based on the intrinsic magnetic properties of the MTJ, the temperature and temperature gradient effects can even be separated. The thermal effect on the magnetization can only be observed when the laser beam is focused directly on the MTJ, while the magnetization dynamics can be excited by acoustic pulses (surface acoustic waves) when the laser pulse hits the surface several μm away from the MTJ. The excited magnetization dynamics due to the magnetoelastic effect strongly depends on the laser heating position and applied magnetic field. Comparing the acoustic wave induced precession frequencies with precession induced by charge currents and with micromagnetic simulations, we identify spatially non-uniform magnetization modes localized close the edge regions as being responsible for the optically induced magnetization dynamics. Two acoustic pulses created by the laser even allow us to coherently control the magnetization precession. The study presented in the thesis shows that the manipulation of spins can be achieved with femtosecond laser pulse heating in a straightforward way. Additionally,the techniques employed in the study enable the use of MTJs for novel applications such as temperature and strain sensors with a large dynamic range.