cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Poincaré gauge gravity: an emergent scenario
Creators: name: Chkareuli, J. L.
Publisher: name: arXiv
Year: 2017
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The Poincaré gauge gravity (PGG) with the underlying vector fields of tetrads and spin-connections is perhaps the best theory candidate for gravitation to be unified with the other three elementary forces of nature. There is a clear analogy between local frame in PGG and local internal symmetry space in the Standard Model. As a result, the spin-connection fields, gauging the local frame Lorentz symmetry group SO(1,3)_{LF}, appear in PGG much as photons and gluons appear in SM. We propose that such an analogy may follow from their common emergent nature allowing to derive PGG in the same way as conventional gauge theories. In essence, we start with an arbitrary theory of some vector and fermion fields which possesses only global spacetime symmetries, such as Lorentz and translational invariance, in flat Minkowski space. The two vector field multiplets involved are proposed to belong, respectively, to the adjoint (A_{μ}^{ij}) and vector (e_{μ}^{i}) representations of the starting global Lorentz symmetry. We show that if these prototype vector fields are covariantly constrained, A_{μ}^{ij}A_{ij}^{μ}=M_{A} and e_{μ}^{i}e_{i}^{μ}=M_{e}, thus causing a spontaneous violation of the accompanying global symmetries (M_{A,e} are their proposed violation scales), then the only possible theory compatible with these length-preserving constraints is turned out to be the gauge invariant PGG, while the corresponding massless (pseudo)Goldstone modes are naturally collected in the emergent gauge fields of tetrads and spin-connections. In a minimal theory case being linear in a curvature we unavoidably come to the Einstein-Cartan theory. The extending theories with propagating spin-connection and tetrad modes are also considered and their possible unification with the Standard Model is briefly discussed.
description: 33 pages, published version, to appear in Physical Review D (2017). arXiv admin note: text overlap with arXiv:1305.6898
Autoavaluació del treball individual
Creators: name: De Haro, J.J.
Publisher: name: Zenodo
Year: 2022
Subjects: autoavalació
escala de valoració

description: Escala de valoració del treball individual amb preguntes sobre les dificultats, preferències i grau d'aprenentatge.
description: Traduït i modificat de: "Autoevaluación trabajo individual alumnado" de Cedec
Emergent Topology in Many-Body Dissipative Quantum Matter
Creators: name: García-García, Antonio M.
name: Sá, Lucas
name: Verbaarschot, Jacobus J. M.
name: Yin, Can
Publisher: name: arXiv
Year: 2023
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Theory (hep-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The identification, description, and classification of topological features is an engine of discovery and innovation in several fields of physics. This research encompasses a broad variety of systems, from the integer and fractional Chern insulators in condensed matter, to protected states in complex photonic lattices in optics, and the structure of the QCD vacuum. Here, we introduce another playground for topology: the dissipative dynamics of pseudo-Hermitian many-body quantum systems. For that purpose, we study two different systems, the dissipative Sachdev-Ye-Kitaev (SYK) model, and a quantum chaotic dephasing spin chain. For the two different many-body models, we find the same topological features for a wide range of parameters suggesting that they are universal. In the SYK model, we identify four universality classes, related to pseudo-Hermiticity, characterized by a rectangular block representation of the vectorized Liouvillian that is directly related to the existence of an anomalous trace of the unitary operator implementing fermionic exchange. As a consequence of this rectangularization, we identify a topological index $ν$ that only depends on symmetry. Another distinct consequence of the rectangularization is the observation, for any coupling to the bath, of purely real topological modes in the Liouvillian. The level statistics of these real modes agree with that of the corresponding random matrix ensemble and therefore can be employed to characterize the four topological symmetry classes. In the limit of weak coupling to the bath, topological modes govern the approach to equilibrium, which may enable a direct path for experimental confirmation of topology in dissipative many-body quantum chaotic systems.
description: 15 pages, 9 figures. v2: references added. v3: expanded discussion of universality, plus minor corrections. v4: as published
F-theory and AdS_3/CFT_2
Creators: name: Couzens, Christopher
name: Lawrie, Craig
name: Martelli, Dario
name: Schafer-Nameki, Sakura
name: Wong, Jin-Mann
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We construct supersymmetric AdS_3 solutions in F-theory, that is Type IIB supergravity with varying axio-dilaton, which are holographically dual to 2d N=(0,4) superconformal field theories with small superconformal algebra. In F-theory these arise from D3-branes wrapped on curves in the base of an elliptically fibered Calabi-Yau threefold Y_3 and correspond to strings in the 6d N=(1,0) theory obtained from F-theory on Y_3. The non-trivial fibration over the wrapped curves implies a varying coupling of the N=4 Super-Yang-Mills theory on the D3-branes. We compute the holographic central charges and show that these agree with the field theory and with the anomalies of self-dual strings in 6d. We complement our analysis with a discussion of the dual M-theory solutions and a comparison of the central charges.
description: 83 pages, v2: references added, typos corrected
MPEC 2023-R134 : 2023 OS1
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2023
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Scrutinizing the extraordinary mosaic evolution of SARS-like coronaviruses
Creators: name: Jankovic, D
Publisher: name: Zenodo
Year: 2024

description: Papers and sequences published by Wuhan Institute of Virology (WIV) are fundamental to our understanding of zoonotic SARS-like bat coronaviruses, the presumed ancestors of both SARS and SARS-CoV-2. The seminal paper that is “Isolation and characterization of a bat SARS-like coronavirus that uses the ACE2 receptor” (Ge et al, 2013) and the viral sequences Rs3367, RsSHC014 and WIV1 published to GenBank in November, 2013[i]. This, and subsequent papers from WIV, make explicit and implicit claims in relation to the evolution of SARS which contradict a widely accepted model of recombination in single-stranded RNA viruses. Most startlingly, an imputable recombination between ancestors of Rs3367 and RsSHC014 occurs precisely at a breakpoint previously identified by WIV experimentally as optimal, and chosen by another group in an experiment to create a synthetic chimera. Another implied recombination involves the natural insertion of a novel gene, ORFX, into an otherwise undisturbed backbone sequence. WIV’s work purports to show evidence of natural evolutionary mechanisms that may cause rapid species and/or tissue tropism changes, or gain of function via acquisition of a novel gene as an insert. It is important that these results be independently verified.
A method to measure the transverse magnetic field and orient the rotational axis of stars
Creators: name: Leone, Francesco
name: Scalia, Cesare
name: Gangi, Manuele
name: Giarrusso, Marina
name: Munari, Matteo
name: Scuderi, Salvatore
name: Trigilio, Corrado
name: Stift, Martin
Publisher: name: arXiv
Year: 2017
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Direct measurements of the stellar magnetic fields are based on the splitting of spectral lines into polarized Zeeman components. With few exceptions, Zeeman signatures are hidden in data noise and a number of methods have been developed to measure the average, over the visible stellar disk, of longitudinal components of the magnetic field. As to faint stars, at present observable only with low resolution spectropolarimetry, a method is based on the regression of the Stokes V signal against the first derivative of Stokes I. Here we present an extension of this method to obtain a direct measurement of the transverse component of stellar magnetic fields by the regression of high resolution Stokes Q and U as a function of the second derivative of Stokes I. We also show that it is possible to determine the orientation in the sky of the rotation axis of a star on the basis of the periodic variability of the transverse component due to its rotation. The method is applied to data, obtained with the Catania Astrophysical Observatory Spectropolarimeter, along the rotational period of the well known magnetic star \b{eta} CrB.
description: 8 pages, 4 figures
The Weyl-Heisenberg ensemble: hyperuniformity and higher Landau levels
Creators: name: Abreu, Luís Daniel
name: Pereira, João M.
name: Romero, José Luis
name: Torquato, Salvatore
Publisher: name: arXiv
Year: 2016
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: Weyl-Heisenberg ensembles are a class of determinantal point processes associated with the Schrödinger representation of the Heisenberg group. Hyperuniformity characterizes a state of matter for which (scaled) density fluctuations diminish towards zero at the largest length scales. We will prove that Weyl-Heisenberg ensembles are hyperuniform. Weyl-Heisenberg ensembles include as a special case a multi-layer extension of the Ginibre ensemble modeling the distribution of electrons in higher Landau levels, which has recently been object of study in the realm of the Ginibre-type ensembles associated with polyanalytic functions. In addition, the family of Weyl-Heisenberg ensembles includes new structurally anisotropic processes, where point-statistics depend on the different spatial directions, and thus provide a first means to study directional hyperuniformity.
description: 17 pages, 2 figures. (Typos corrected.)
Muon-neutrino-induced charged current pion production on nuclei
Creators: name: Mosel, U.
name: Gallmeister, K.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: [Background] Long-Baseline experiments such as T2K, NOvA or the planned Deep Underground Neutrino Experiment (DUNE) require theoretical descriptions of the complete event in a neutrino-nucleus reaction. Since nuclear targets are used this requires a good understanding of neutrino-nucleus interactions. [Purpose] One of the dominant reaction channels in neutrino-nucleus interactions is pion production. This paper aims for a coherent view on all charged current charged pion production data that are avaible from the experiments MiniBooNE, the near detector experiment at T2K and MINERvA. [Methods] Pion production is treated through excitations of nucleon resonances, including background terms, and deep inelastic scattering. The final state interactions of the produced pions are described within the Giessen-Boltzmann-Uehling-Uhlenbeck (GiBUU) implementation of quantum-kinetic transport theory. [Results] Results are given for MiniBooNE, the near detector experiment at T2K and for MINERvA. While the theoretical results for MiniBooNE differ from the data both in shape and magnitude, their agreement both with the T2K and the MINERvA data is good for all pion and lepton observables. Predictions for pion spectra are shown for MicroBooNE and NOvA. [Conclusions] Based on the GiBUU model of lepton-nucleus interactions a consistent, good theoretical description of CC charged pion production data from the T2K ND and the MINERvA experiments is possible, without any parameter tunes. The MiniBooNE data cannot be reproduced.
description: Version accepted for publication in Phys. Rev. C. Short discussion of the essential features of GiBUU 2016 is added as well as a short investigation of many-pion events. For NOvA one new figure is added that shows pion spectra with and without fsi both for H and for C
A pointwise inequality for a biharmonic equation with negative exponent and related problems
Creators: name: Ngô, Quôc Anh
name: Nguyen, Van Hoang
name: Phan, Quoc Hung
Publisher: name: arXiv
Year: 2017
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: Inspired by a recent pointwise differential inequality for positive bounded solutions of the fourth-order Hénon equation $Δ^2 u = |x|^a u^p$ in ${\mathbb R}^n$ with $a \geqslant 0$, $p > 1$, $n \geqslant 5$ due to Fazly, Wei, and Xu [ Anal. PDE., 8(2015) 1541--1563], first for some positive constants $α$ and $β$ we establish the following pointwise inequality \[ Δu \geqslant αu^{-\frac{q-1}2} + βu^{-1} |\nabla u|^2 \] in ${\mathbb R}^n$ with $n \geqslant 3$ for positive $C^4$-solutions of the fourth-order equation \[ Δ^2u=-u^{-q} \quad \text{ in } \mathbb R^n \] where $q > 1$. Next, we prove a comparison property for Lane--Emden system with exponents of mixed sign. Finally, we give an analogue result for parabolic models by establishing a comparison property for parabolic system of Lane--Emden type. To obtain all these results, a new argument of maximum principle is introduced, which allows us to deal with solutions with high growth at infinity. We expect to see more applications of this new method to other problems in different contexts.
Electrostatic solvation free energies of charged hard spheres using molecular dynamics with density functional theory interactions
Creators: name: Duignan, Timothy T.
name: Baer, Marcel D.
name: Schenter, Gregory K.
name: Mundy, Christopher J.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Determining the solvation free energies of single ions in water is one of the most fundamental problems in physical chemistry and yet many unresolved questions remain. In particular, the ability to decompose the solvation free energy into simple and intuitive contributions will have important implications for models of electrolyte solution. Here, we provide definitions of the various types of single ion solvation free energies based on different simulation protocols. We calculate solvation free energies of charged hard spheres using density functional theory interaction potentials with molecular dynamics simulation (DFT-MD) and isolate the effects of charge and cavitation, comparing to the Born (linear response) model. We show that using uncorrected Ewald summation leads to unphysical values for the single ion solvation free energy and that charging free energies for cations are approximately linear as a function of charge but that there is a small non-linearity for small anions. The charge hydration asymmetry (CHA) for hard spheres, determined with quantum mechanics, is much larger than for the analogous real ions. This suggests that real ions, particularly anions, are significantly more complex than simple charged hard spheres, a commonly employed representation.
description: 28 pages, 5 figures
Young Stellar Objects in the Massive Star-Forming Regions W51 and W43
Creators: name: Saral, G.
name: Hora, J. L.
name: Audard, M.
name: Koenig, X. P.
name: Martínez-Galarza, J. R.
name: Motte, F.
name: Nguyen-Luong, Q.
name: Saygac, A. T.
name: Smith, H. A.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present the results of our investigation of the star-forming complexes W51 and W43, two of the brightest in the first Galactic quadrant. In order to determine the young stellar object (YSO) populations in W51 and W43 we used color-magnitude relations based on Spitzer mid-infrared and 2MASS/UKIDSS near-infrared data. We identified 302 Class I YSOs and 1178 Class II/transition disk candidates in W51, and 917 Class I YSOs and 5187 Class II/transition disk candidates in W43. We also identified tens of groups of YSOs in both regions using the Minimal Spanning Tree (MST) method. We found similar cluster densities in both regions even though Spitzer was not able to probe the densest part of W43. By using the Class II/I ratios, we traced the relative ages within the regions and based on the morphology of the clusters we argue that several sites of star formation are independent of one another in terms of their ages and physical conditions. We used spectral energy distribution (SED)-fitting to identify the massive YSO (MYSO) candidates since they play a vital role in the star formation process and then examined them to see if they are related to any massive star formation tracers such as UCH II regions, masers and dense fragments. We identified 17 MYSO candidates in W51, and 14 in W43, respectively and found that groups of YSOs hosting MYSO candidates are positionally associated with H II regions in W51, though we do not see any MYSO candidates associated with previously identified massive dense fragments in W43.
description: 21 pages, 14 tables, 15 figures
On the relationship between the continuum of interstellar extinction curves, the 2200 Å bump, and the diffuse interstellar bands
Creators: name: Zagury, Frederic
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: A previous article argued that the antagonism between sight-lines with and without a bump at 2200 Å disappears, and that the observed properties of interstellar extinction can be globally understood, if it is accepted that scattered starlight contaminates the observed spectrum of reddened stars. The present paper develops this new paradigm by providing a better understanding of the characteristics of this scattered light. It further examines the consequences of this revision of interstellar extinction theory for interpreting the 2200 Å bump and the diffuse interstellar bands (DIBs). Two implications are worth noting: (1) the effect of interstellar extinction on cosmic distance estimations needs to be reconsidered; (2) it is unnecessary to invoke hypothetical particles, such as Poly Aromatic Hydrogenated molecules (PAHs), to explain the peculiarities of interstellar extinction. Hydrogen, by far the most abundant constituent of interstellar clouds, should alone account for the three major features of interstellar extinction: the departure of the continuum from linearity, the bump, and the DIBs.
description: Second version with a redrafted and revised text. 23 pages, 2 figures
Llistes de verificació DUA
Creators: name: De Haro, Juan José
Publisher: name: Zenodo
Year: 2022
Subjects: Lllista de verificació DUA
UDL checklist

description: Llista de comprovació de l'aplicació d'alguns indicadors DUA. Hi ha dues llistes de verificació, una completa amb 60 ítems i altra reduïda amb 30. Cadascuna es troba en una pestanya diferent. DUA no és un checklist ni una llista a emplenar, però en les fases inicials pot ajudar a tenir una visió inclusiva en els materials creats. Les llistes estan en dos formats: ODT per poder emplenar digitalment i PDF per poder imprimir. Traduït i modificat de CREA con DUA: checklist i checklist reducida.
$J/ψ$ production and polarization within a jet
Creators: name: Kang, Zhong-Bo
name: Qiu, Jian-Wei
name: Ringer, Felix
name: Xing, Hongxi
name: Zhang, Hong
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We study the production and polarization of $J/ψ$ mesons within a jet in proton-proton collisions at the LHC. We define the $J/ψ$-jet fragmentation function as a ratio of differential jet cross sections with and without the reconstructed $J/ψ$ in the jet. We demonstrate that this is a very useful observable to help explore the $J/ψ$ production mechanism, and to differentiate between different NRQCD global fits based on inclusive $J/ψ$ cross sections. Furthermore, we propose to measure the polarization of $J/ψ$ mesons inside the jet, which can provide even more stringent constraints for the heavy quarkonium production mechanism.
description: 5 pages, 3 figures, published version
Seasonal Modulation of the $^7$Be Solar Neutrino Rate in Borexino
Creators: name: Agostini, M.
name: Altenmuller, K.
name: Appel, S.
name: Atroshchenko, V.
name: Basilico, D.
name: Bellini, G.
name: Benziger, J.
name: Bick, D.
name: Bonfini, G.
name: Borodikhina, L.
name: Bravo, D.
name: Caccianiga, B.
name: Calaprice, F.
name: Caminata, A.
name: Caprioli, S.
name: Carlini, M.
name: Cavalcante, P.
name: Chepurnov, A.
name: Choi, K.
name: D'Angelo, D.
name: Davini, S.
name: Derbin, A.
name: Ding, X. F.
name: Di Noto, L.
name: Drachnev, I.
name: Fomenko, K.
name: Franco, D.
name: Froborg, F.
name: Gabriele, F.
name: Galbiati, C.
name: Ghiano, C.
name: Giammarchi, M.
name: Goeger-Neff, M.
name: Goretti, A.
name: Gromov, M.
name: Hagner, C.
name: Houdy, T.
name: Hungerford, E.
name: Ianni, Aldo
name: Ianni, Andrea
name: Jany, A.
name: Jeschke, D.
name: Kobychev, V.
name: Korablev, D.
name: Korga, G.
name: Kryn, D.
name: Laubenstein, M.
name: Lehnert, B.
name: Litvinovich, E.
name: Lombardi, F.
name: Lombardi, P.
name: Ludhova, L.
name: Lukyanchenko, G.
name: Machulin, I.
name: Manecki, S.
name: Manuzio, G.
name: Marcocci, S.
name: Martyn, J.
name: Meroni, E.
name: Meyer, M.
name: Miramonti, L.
name: Misiaszek, M.
name: Montuschi, M.
name: Muratova, V.
name: Neumair, B.
name: Oberauer, L.
name: Opitz, B.
name: Ortica, F.
name: Pallavicini, M.
name: Papp, L.
name: Pocar, A.
name: Ranucci, G.
name: Razeto, A.
name: Re, A.
name: Romani, A.
name: Roncin, R.
name: Rossi, N.
name: Schonert, S.
name: Semenov, D.
name: Shakina, P.
name: Skorokhvatov, M.
name: Smirnov, O.
name: Sotnikov, A.
name: Stokes, L. F. F.
name: Suvorov, Y.
name: Tartaglia, R.
name: Testera, G.
name: Thurn, J.
name: Toropova, M.
name: Unzhakov, E.
name: Vishneva, A.
name: Vogelaar, R. B.
name: von Feilitzsch, F.
name: Wang, H.
name: Weinz, S.
name: Wojcik, M.
name: Wurm, M.
name: Yokley, Z.
name: Zaimidoroga, O.
name: Zavatarelli, S.
name: Zuber, K.
name: Zuzel, G.
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: We detected the seasonal modulation of the $^7$Be neutrino interaction rate with the Borexino detector at the Laboratori Nazionali del Gran Sasso in Italy. The period, amplitude, and phase of the observed time evolution of the signal are consistent with its solar origin, and the absence of an annual modulation is rejected at 99.99\% C.L. The data are analyzed using three methods: the sinusoidal fit, the Lomb-Scargle and the Empirical Mode Decomposition techniques, which all yield results in excellent agreement.
description: 11 palese, 13 figures
BioTA Podcast Working Group Lightning Talk - YouTube
Creators: name: Mulcahy, Mary
name: Goller, Carlos
name: Gibson, J.
Publisher: name: QUBES Educational Resources
Year: 2022

description: This lightning talk outlines out work to develop a set of podcasts and in0class activities. The podcast episodes on metagenomics in general are available. Additional resources and additional podcast episodes are in development!
Llista de comprovació per avaluar la qualitat d'un Recurs Educatiu Obert (REO)
Creators: name: CEDEC
name: De Haro, Juan José
Publisher: name: Zenodo
Year: 2022
Subjects: OER
REO
REA
Llista d'avaluació

description: La Llista de comprovació per avaluar la qualitat d’un Recurs Educatiu Obert (REO) en format ODT, consta de dues parts: La llista de comprovació amb els indicadors. A continuació s'ofereix la revisió amb dos ítems, sí o no. Un annex amb especificacions per a cada indicador. En aquest segon apartat el professorat pot aprofundir en el significat dels indicadors i conèixer-ne alguns exemples.
Generation of radiative neutrino mass in the linear seesaw framework, charged lepton flavor violation and dark matter
Creators: name: Das, Arindam
name: Nomura, Takaaki
name: Okada, Hiroshi
name: Roy, Sourov
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We investigate a model with local U(1)$_{B-L}$ and discrete $Z_2$ symmetries where two types of weak isospin singlet neutrinos, vector-like charged lepton and exotic scalar fields are introduced. The linear seesaw mechanism is induced at one-loop level through Yukawa interactions associated with the standard model leptons and exotic fields. We also discuss lepton flavor violation and muon anomalous dipole magnetic moment induced by the new Yukawa interaction. In addition, our model has dark matter candidate which is the lightest $Z_2$ odd neutral particle. We calculate the relic density and constraints from direct detection.
description: 20 pages, 4 figures, typos corrected, references added, collider prospects added, version accepted for publication in Physical Review D
Review protocol - First draft - Review of health research and data on racialised minorities: Implications for addressing racism and and racial disparities in public health practice and policies in Europe
Creators: name: Meudec, Marie
name: Affun-Adegbulu, Clara
name: Cosaert, Theo
Publisher: name: Zenodo
Year: 2022
Subjects: racism
racial health disparities
racialised minority groups
health research

description: First draft of the review protocol, June 29th 2022, currently being finalised. Please, cite us if you use our work :)
Llista de comprovació per avaluar la qualitat d'un Recurs Educatiu Obert (REO)
Creators: name: De Haro, J.J.
Publisher: name: Zenodo
Year: 2022
Subjects: OER
REO
REA
Llista d'avaluació

description: La Llista de comprovació per avaluar la qualitat d’un Recurs Educatiu Obert (REO) en formats ODT i PDF, consta de dues parts: La llista de comprovació amb els indicadors. A continuació s'ofereix la revisió amb dos ítems, sí o no. Un annex amb especificacions per a cada indicador. En aquest segon apartat el professorat pot aprofundir en el significat dels indicadors i conèixer-ne alguns exemples.
Online Robot Introspection via Wrench-based Action Grammars
Creators: name: Rojas, Juan
name: Luo, Shuangqi
name: Zhu, Dingqiao
name: Du, Yunlong
name: Lin, Hongbin
name: Huang, Zhengjie
name: Kuang, Wenwei
name: Harada, Kensuke
Publisher: name: arXiv
Year: 2017
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: Robotic failure is all too common in unstructured robot tasks. Despite well-designed controllers, robots often fail due to unexpected events. How do robots measure unexpected events? Many do not. Most robots are driven by the sense-plan act paradigm, however more recently robots are undergoing a sense-plan-act-verify paradigm. In this work, we present a principled methodology to bootstrap online robot introspection for contact tasks. In effect, we are trying to enable the robot to answer the question: what did I do? Is my behavior as expected or not? To this end, we analyze noisy wrench data and postulate that the latter inherently contains patterns that can be effectively represented by a vocabulary. The vocabulary is generated by segmenting and encoding the data. When the wrench information represents a sequence of sub-tasks, we can think of the vocabulary forming a sentence (set of words with grammar rules) for a given sub-task; allowing the latter to be uniquely represented. The grammar, which can also include unexpected events, was classified in offline and online scenarios as well as for simulated and real robot experiments. Multiclass Support Vector Machines (SVMs) were used offline, while online probabilistic SVMs were are used to give temporal confidence to the introspection result. The contribution of our work is the presentation of a generalizable online semantic scheme that enables a robot to understand its high-level state whether nominal or abnormal. It is shown to work in offline and online scenarios for a particularly challenging contact task: snap assemblies. We perform the snap assembly in one-arm simulated and real one-arm experiments and a simulated two-arm experiment. This verification mechanism can be used by high-level planners or reasoning systems to enable intelligent failure recovery or determine the next most optima manipulation skill to be used.
description: arXiv admin note: substantial text overlap with arXiv:1609.04947
The Heisenberg-Euler effective action in slowly varying electric field inhomogeneities of Lorentzian shape
Creators: name: Karbstein, Felix
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We use a locally constant field approximation (LCFA) to study the one-loop Heisenberg-Euler effective action in a particular class of slowly varying inhomogeneous electric fields of Lorentzian shape with $0\leq d\leq 4$ inhomogeneous directions. We show that for these fields, the LCFA of the Heisenberg-Euler effective action can be represented in terms of a single parameter integral, with the constant field effective Lagrangian with rescaled argument as integration kernel. The imaginary part of the Heisenberg-Euler effective action contains information about the instability of the quantum vacuum towards the formation of a state with real electrons and positrons. Here, we in particular focus on the dependence of the instantaneous vacuum decay rate on the dimension $d$ of the field inhomogeneity. Specifically for weak fields, we find an overall parametric suppression of the effect with $(E_0/E_{\rm cr})^{d/2}$, where $E_0$ is the peak field strength of the inhomogeneity and $E_{\rm cr}$ the critical electric field strength.
description: 11 pages; some clarifications added, matches journal version
XVIII МЕЖДУНАРОДНАЯ НАУЧНО-ПРАКТИЧЕСКАЯ КОНФЕРЕНЦИЯ «Развитие науки и практики в глобально меняющемся мире в условиях рисков»
Creators: name: ООО "Институт развития образования и консалтинга"
Publisher: name: ООО "Институт развития образования и консалтинга"
Year: 2023

description: XVIII МЕЖДУНАРОДНАЯ НАУЧНО-ПРАКТИЧЕСКАЯ КОНФЕРЕНЦИЯ «Развитие науки и практики в глобально меняющемся мире в условиях рисков»
National Association of Women Artists (1889-1979) 90th Annual Exhibition, May 2nd thru May 24th, 1979
Creators: name: No Name Supplied
Publisher: name: No Publisher Supplied
Year: 1979

description: The National Association of Women Artists (NAWA) was established in 1889 and is the oldest professional women's fine arts organization in the United States. NAWA's mission is to promote awareness of, and interest in, visual art created by women in the United States. As part of this effort NAWA holds an annual exhibition of works by members of the association and publishes an exhibition catalog to accompany or commemorate the annual exhibitions. These catalogs not only function as an exhibition catalog, but also as a document that summarizes the structure, membership, and activities of the association.Information that can be found in these catalogs includes lists of officers, members of the executive board and committees, prize winners, lists of exhibitor and members, and images of some of the artwork exhibited. Catalogs from the 2000s also include information on NAWA events and activities beyond the annual exhibition.Please note that the numbering of the annual catalogs was adjusted in 1960 and again in 1971. For example, NAWA designated the annual exhibition in 1960 as the 70th Anniversary Exhibition after 1959 was the 67th Annual Exhibition. These adjustments appear to have been made to reflect the date of the founding of the association, so that, by 1989, the annual exhibition commemorated the 100-year anniversary of the founding of NAWA in 1889.
Feed-forward approximations to dynamic recurrent network architectures
Creators: name: Muir, Dylan Richard
Publisher: name: arXiv
Year: 2017
Subjects: subject: Neural and Evolutionary Computing (cs.NE)
subject: Neurons and Cognition (q-bio.NC)
subject: FOS: Computer and information sciences
subject: FOS: Biological sciences

description: Recurrent neural network architectures can have useful computational properties, with complex temporal dynamics and input-sensitive attractor states. However, evaluation of recurrent dynamic architectures requires solution of systems of differential equations, and the number of evaluations required to determine their response to a given input can vary with the input, or can be indeterminate altogether in the case of oscillations or instability. In feed-forward networks, by contrast, only a single pass through the network is needed to determine the response to a given input. Modern machine-learning systems are designed to operate efficiently on feed-forward architectures. We hypothesised that two-layer feedforward architectures with simple, deterministic dynamics could approximate the responses of single-layer recurrent network architectures. By identifying the fixed-point responses of a given recurrent network, we trained two-layer networks to directly approximate the fixed-point response to a given input. These feed-forward networks then embodied useful computations, including competitive interactions, information transformations and noise rejection. Our approach was able to find useful approximations to recurrent networks, which can then be evaluated in linear and deterministic time complexity.
description: Author's final version, accepted for publication in Neural Computation
Tunnelling in Dante's Inferno
Creators: name: Furuuchi, Kazuyuki
name: Sperling, Marcus
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We study quantum tunnelling in Dante's Inferno model of large field inflation. Such a tunnelling process, which will terminate inflation, becomes problematic if the tunnelling rate is rapid compared to the Hubble time scale at the time of inflation. Consequently, we constrain the parameter space of Dante's Inferno model by demanding a suppressed tunnelling rate during inflation. The constraints are derived and explicit numerical bounds are provided for representative examples. Our considerations are at the level of an effective field theory; hence, the presented constraints have to hold regardless of any UV completion.
description: v2: 25 pages, 5 figures, 1 table, accepted in JCAP
Spin Pumping, Dissipation, and Direct and Alternating Inverse Spin Hall Effects in Magnetic Insulator-Normal Metal Bilayers
Creators: name: Kapelrud, André
name: Brataas, Arne
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We theoretically consider the spin-wave mode- and wavelength-dependent enhancement of the Gilbert damping in magnetic insulator--normal metal bilayers due to spin pumping as well as the enhancement's relation to direct and alternating inverse spin Hall voltages in the normal metal. In the long-wavelength limit, including long-range dipole interactions, the ratio of the enhancement for transverse volume modes to that of the macrospin mode is equal to two. With an out-of-plane magnetization, this ratio decreases with both an increasing surface anisotropic energy and mode number. If the surface anisotropy induces a surface state, the enhancement can be an order of magnitude larger than for to the macrospin. With an in-plane magnetization, the induced dissipation enhancement can be understood by mapping the anisotropy parameter to the out-of-plane case with anisotropy. For shorter wavelengths, we compute the enhancement numerically and find good agreement with the analytical results in the applicable limits. We also compute the induced direct- and alternating-current inverse spin Hall voltages and relate these to the magnetic energy stored in the ferromagnet. Because the magnitude of the direct spin Hall voltage is a measure of spin dissipation, it is directly proportional to the enhancement of Gilbert damping. The alternating spin Hall voltage exhibits a similar in-plane wave-number dependence, and we demonstrate that it is greatest for surface-localized modes.
Surfing on protein waves: proteophoresis as a mechanism for bacterial genome partitioning
Creators: name: Walter, Jean-Charles
name: Dorignac, Jérôme
name: Lorman, Vladimir
name: Rech, Jérôme
name: Bouet, Jean-Yves
name: Nollmann, Marcelo
name: Palmeri, John
name: Parmeggiani, Andrea
name: Geniet, Frédéric
Publisher: name: arXiv
Year: 2017
Subjects: subject: Subcellular Processes (q-bio.SC)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: Efficient bacterial chromosome segregation typically requires the coordinated action of a three-components, fueled by adenosine triphosphate machinery called the partition complex. We present a phenomenological model accounting for the dynamic activity of this system. The model is obtained by coupling simple linear reaction-diffusion equations with a proteophoresis, or "volumetric" chemophoresis, force field. This minimal description, in the sense of Occam's Razor principle, captures most known experimental observations: dynamic oscillations of complex components, complex separation and subsequent symmetrical positioning. The predictions of our model are in phenomenological agreement with and provide substantial insights into recent experiments. From a non-linear physics view point, this system explores the active separation of matter at micrometric scales with a dynamical instability between static positioning and travelling wave regimes.
description: 6 pages, 3 figures
Frequent flaring in the TRAPPIST-1 system - unsuited for life?
Creators: name: Vida, Krisztián
name: Kővári, Zsolt
name: Pál, András
name: Oláh, Katalin
name: Kriskovics, Levente
Publisher: name: arXiv
Year: 2017
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We analyze short cadence K2 light curve of the TRAPPIST-1 system. Fourier analysis of the data suggests $P_\mathrm{rot}=3.295\pm0.003$ days. The light curve shows several flares, of which we analyzed 42 events, these have integrated flare energies of $1.26\times10^{30}-1.24\times10^{33}$ ergs. Approximately 12% of the flares were complex, multi-peaked eruptions. The flaring and the possible rotational modulation shows no obvious correlation. The flaring activity of TRAPPIST-1 probably continuously alters the atmospheres of the orbiting exoplanets, making these less favorable for hosting life.
description: 8 pages, 6 figures, accepted in ApJ
ReFusion: Learning Image Fusion from Reconstruction with Learnable Loss via Meta-Learning
Creators: name: Bai, Haowen
name: Zhao, Zixiang
name: Zhang, Jiangshe
name: Wu, Yichen
name: Deng, Lilun
name: Cui, Yukun
name: Xu, Shuang
name: Jiang, Baisong
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Image fusion aims to combine information from multiple source images into a single one with more comprehensive informational content. Deep learning-based image fusion algorithms face significant challenges, including the lack of a definitive ground truth and the corresponding distance measurement. Additionally, current manually defined loss functions limit the model's flexibility and generalizability for various fusion tasks. To address these limitations, we propose ReFusion, a unified meta-learning based image fusion framework that dynamically optimizes the fusion loss for various tasks through source image reconstruction. Compared to existing methods, ReFusion employs a parameterized loss function, that allows the training framework to be dynamically adapted according to the specific fusion scenario and task. ReFusion consists of three key components: a fusion module, a source reconstruction module, and a loss proposal module. We employ a meta-learning strategy to train the loss proposal module using the reconstruction loss. This strategy forces the fused image to be more conducive to reconstruct source images, allowing the loss proposal module to generate a adaptive fusion loss that preserves the optimal information from the source images. The update of the fusion module relies on the learnable fusion loss proposed by the loss proposal module. The three modules update alternately, enhancing each other to optimize the fusion loss for different tasks and consistently achieve satisfactory results. Extensive experiments demonstrate that ReFusion is capable of adapting to various tasks, including infrared-visible, medical, multi-focus, and multi-exposure image fusion.
description: This article is published in International Journal of Computer Vision (IJCV), 2024
A Stronger Multi-observable Uncertainty Relation
Creators: name: Song, Qiu-Cheng
name: Li, Jun-Li
name: Peng, Guang-Xiong
name: Qiao, Cong-Feng
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Uncertainty relation lies at the heart of quantum mechanics, characterizing the incompatibility of non-commuting observables in the preparation of quantum states. An important question is how to improve the lower bound of uncertainty relation. Here we present a variance-based sum uncertainty relation for $N$ incompatible observables stronger than the simple generalization of the uncertainty relation for two observables derived by Maccone and Pati [Phys. Rev. Lett. {\bf113}, 260401 (2014)]. Further comparisons of our uncertainty relation with other related ones for spin-$\frac{1}{2}$ and spin-$1$ particles indicate that the obtained uncertainty relation gives a better lower bound.
description: Updated version with minor corrections
Practical and Secure Keyword Search Services on Blockchain
Creators: name: Zhao, Jun
Publisher: name: Monash University
Year: 2025
Subjects: classificationCode: 460403
subject: Data security and protection

description: This thesis investigates the challenges and solutions in developing blockchain-based searchable encryption systems, with a focus on key aspects such as security, scalability, and incentives. First, this thesis introduces a novel off-chain verification method for SSE systems, addressing both dishonest server nodes and users, ensuring security and on-chain scalability. Second, it proposes a non-verification-based approach to enhance the scalability of blockchain databases, introducing a VRF-based load-balancing algorithm that improves throughput while preserving the security guarantees of blockchain technology. Third, it presents SEARCHAIN, a proof-of-useful-work blockchain system for SSE queries, which incorporates a novel committee selection algorithm to incentivise honest verification by auditors, ensuring service fairness. Through both theoretical analysis and empirical evaluation, this thesis demonstrates how these approaches enhance the security and practicality of blockchain-based SSE systems.
Microscopic origin of ideal conductivity in integrable quantum models
Creators: name: Ilievski, Enej
name: De Nardis, Jacopo
Publisher: name: arXiv
Year: 2017
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: Non-ergodic dynamical systems display anomalous transport properties. A prominent example are integrable quantum systems, whose exceptional property are diverging DC conductivities. In this Letter, we explain the microscopic origin of ideal conductivity by resorting to the thermodynamic particle content of a system. Using group-theoretic arguments we rigorously resolve the long-standing controversy regarding the nature of spin and charge Drude weights in the absence of chemical potentials. In addition, by employing a hydrodynamic description, we devise an efficient computational method to calculate exact Drude weights from the stationary currents generated in an inhomogeneous quench from bi-partitioned initial states. We exemplify the method on the anisotropic Heisenberg model at finite temperatures for the entire range of anisotropies, accessing regimes which are out of reach with other approaches. Quite remarkably, spin Drude weight and asymptotic spin current rates reveal a completely discontinuous (fractal) dependence on the anisotropy parameter.
description: 4 pages + Supplemental Material
Review protocol - Final version - Review of health research and data on racialised minorities: Implications for addressing racism and and racial disparities in public health practice and policies in Europe
Creators: name: Meudec, Marie
name: Affun-Adegbulu, Clara
name: Cosaert, Theo
name: Eskedar Getie Mekonnen
Publisher: name: Zenodo
Year: 2022
Subjects: racism
racial health disparities
racialised minority groups
health research

description: Final version of the review protocol.
Elastic-plastic analysis of functionally graded bars under torsional loading
Creators: name: Tsiatas, George C.
name: Babouskos, Nick G.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: In this paper a new integral equation solution to the elastic-plastic problem of functionally graded bars under torsional loading is presented. The formulation is general in the sense that it can be applied to an arbitrary cross-section made of any type of elastoplastic material. In material science the Functionally Graded Material (FGM) is a non-homogeneous composite which performs as a single-phase material, by unifying the best properties of its constituent phase material. The nonlinear elastic-plastic behavior is treated by employing the deformation theory of plasticity. According to this theory, the material constants are assumed variable within the cross section, and are updated through an iterative process so as the equivalent stress and strain at each point coincide with the uniaxial material curve. In this investigation a new straightforward nonlinear procedure is introduced in the deformation theory of plasticity which simplifies the solution method. At each iteration step, the warping function is obtained by solving the torsion problem of a non-homogeneous isotropic bar using the Boundary Element Method (BEM) in conjunction with the Analog Equation Method (AEM). Without restricting the generality, the FGM material is comprised of a ceramic phase and a metal phase. The ceramic is assumed to behave linearly elastic, whereas the metal is modeled as an elastic-linear hardening material. Furthermore, the TTO homogenization scheme for estimating the effective properties of the two-phase FGM was adopted. Several bars with various cross-sections and material types are analyzed, in order to validate the proposed model and exemplify its salient features. Moreover, useful conclusion are drawn from the elastic-plastic behavior of functionally graded bars under torsional loading.