cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
An iterative method for solving elliptic Cauchy problems
Creators: name: Leitao, A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics
subject: 65J20, 47A52

description: We investigate the Cauchy problem for elliptic operators with $C^\infty$-coefficients at a regular set $Ω\subset R^2$, which is a classical example of an ill-posed problem. The Cauchy data are given at the subset $Γ\subset \partialΩ$ and our objective is to reconstruct the trace of the $H^1(Ω)$ solution of an elliptic equation at $\partial Ω/ Γ$. The method described here is a generalization of the algorithm developed by Maz'ya et al. [Ma] for the Laplace operator, who proposed a method based on solving successive well-posed mixed boundary value problems (BVP) using the given Cauchy data as part of the boundary data. We give an alternative convergence proof for the algorithm in the case we have a linear elliptic operator with $C^\infty$-coefficients. We also present some numerical experiments for a special non linear problem and the obtained results are very promisive.
description: 28 pages, 6 figures
Cognitive biases in social anxiety : an experimental study of the Clark/Wells model
Creators: name: Mellings, Tanna Marlane Boucher
Publisher: name: University of British Columbia
Year: 2009

description: This study examined cognitive processing of internal and external sources of information during social interactions. Socially anxious (N=58) and nonanxious (N=58) male and female students participated in a social interaction with a confederate and then completed measures of attentional focus, social judgment, memory for various types of social information, and rumination. Compared to nonanxious participants, socially anxious participants selectively attended to self versus partner information, displayed greater judgmental biases, recalled less partner-related and more self-related information, and displayed greater post-interaction rumination. State anxiety did not significantly affect memory. The results suggested that socially anxious subjects displayed selective attention and encoding rather than selective retrieval of social information.
A note on the Grothendieck ring of the symmetric group
Creators: name: Bonnafé, Cédric
Publisher: name: arXiv
Year: 2005
Subjects: subject: Representation Theory (math.RT)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 20C30, 05E10

description: Let $p$ be a prime number and let $n$ be a non-zero natural number. We compute the descending Loewy series of the algebra $R\_n/pR\_n$, where $R\_n$ denotes the ring of virtual ordinary characters of the symmetric group $S\_n$.
description: 5 pages
Automated system to measure Tandem Gait to assess executive functions in children
Creators: name: Zadeh, Mohammad Zaki
name: Babu, Ashwin Ramesh
name: Jaiswal, Ashish
name: Kyrarini, Maria
name: Bell, Morris
name: Makedon, Fillia
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: As mobile technologies have become ubiquitous in recent years, computer-based cognitive tests have become more popular and efficient. In this work, we focus on assessing motor function in children by analyzing their gait movements. Although there has been a lot of research on designing automated assessment systems for gait analysis, most of these efforts use obtrusive wearable sensors for measuring body movements. We have devised a computer vision-based assessment system that only requires a camera which makes it easier to employ in school or home environments. A dataset has been created with 27 children performing the test. Furthermore in order to improve the accuracy of the system, a deep learning based model was pre-trained on NTU-RGB+D 120 dataset and then it was fine-tuned on our gait dataset. The results highlight the efficacy of proposed work for automating the assessment of children's performances by achieving 76.61% classification accuracy.
Normalized Leonard pairs and Askey-Wilson relations
Creators: name: Vidunas, Raimundas
Publisher: name: arXiv
Year: 2005
Subjects: subject: Rings and Algebras (math.RA)
subject: Quantum Algebra (math.QA)
subject: FOS: Mathematics
subject: 33C45, 33D45, 17B37, 05E35

description: Let $V$ denote a vector space with finite positive dimension, and let $(A,B)$ denote a Leonard pair on $V$. As is known, the linear transformations $A,B$ satisfy the Askey-Wilson relations A^2B -bABA +BA^2 -g(AB+BA) -rB = hA^2 +wA +eI, B^2A -bBAB +AB^2 -h(AB+BA) -sA = gB^2 +wB +fI, for some scalars $b,g,h,r,s,w,e,f$. The scalar sequence is unique if the dimension of $V$ is at least 4. If $c,c*,t,t*$ are scalars and $t,t*$ are not zero, then $(tA+c,t*B+c*)$ is a Leonard pair on $V$ as well. These affine transformations can be used to bring the Leonard pair or its Askey-Wilson relations into a convenient form. This paper presents convenient normalizations of Leonard pairs by the affine transformations, and exhibits explicit Askey-Wilson relations satisfied by them.
description: 22 pages; corrected version, with improved presentation of Section 9
title: Dagstuhl Reports, Table of Contents, Volume 7, Issue 5, 2017
Creators: name: Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Publisher: name: Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Year: 2018
Subjects: subject: Dagstuhl Reports
subject: Table of Contents
subject: Volume 7
subject: Issue 5
subject: 2017

description: Table of Contents, Frontmatter
description: Dagstuhl Reports, Volume 7, Issue 5, pages i-ii
On Tree Amplitudes in Gauge Theory and Gravity
Creators: name: Arkani-Hamed, Nima
name: Kaplan, Jared
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The BCFW recursion relations provide a powerful way to compute tree amplitudes in gauge theories and gravity, but only hold if some amplitudes vanish when two of the momenta are taken to infinity in a particular complex direction. This is a very surprising property, since individual Feynman diagrams all diverge at infinite momentum. In this paper we give a simple physical understanding of amplitudes in this limit, which corresponds to a hard particle with (complex) light-like momentum moving in a soft background, and can be conveniently studied using the background field method exploiting background light-cone gauge. An important role is played by enhanced spin symmetries at infinite momentum--a single copy of a "Lorentz" group for gauge theory and two copies for gravity--which together with Ward identities give a systematic expansion for amplitudes at large momentum. We use this to study tree amplitudes in a wide variety of theories, and in particular demonstrate that certain pure gauge and gravity amplitudes do vanish at infinity. Thus the BCFW recursion relations can be used to compute completely general gluon and graviton tree amplitudes in any number of dimensions. We briefly comment on the implications of these results for computing massive 4D amplitudes by KK reduction, as well understanding the unexpected cancelations that have recently been found in loop-level gravity amplitudes.
description: 22 pages, 3 figures
D3.01 Assessment Report
Creators: name: Antić Gaber, Milica
name: Kos, Živa
name: Podreka, Jasna
name: Cankar, Tjaša
Publisher: name: Zenodo
Year: 2021
Subjects: Contextual analyses
Institutional assessment
Participation
Self-diagnosis
PGAs
STEM
SSH

description: The aim of the D3.1. Deliverable is to increase understanding with regard to common points and specifics in the current positions of six GEP implementing institutions in relation to gender equality with the aim of preparing and implementing institutional GEPs. The deliverable is a comparative summary of different areas of gender equality, covering a contextual analysis of legal and cultural practices and specific problem areas, as obtained using the SUPERA tool (these areas being national context, recruitment, retention and career progression, leadership, research and curricula, sexual harassment and discrimination). The gender equality practices established at six GEP implementing institutions were compared, using data and information gathered at the institutional level. Where possible, gender inequalities across disciplines or within Social Sciences and Humanities were compared. The deliverable concludes with presenting some common issues in relation to gender equality and possible elements for future initiatives related to gender equality at the institutional level.
On Asteroid Retrieval Missions Enabled by Invariant Manifold Dynamics
Creators: name: Tyler, Jack
name: Wittig, Alexander
Publisher: name: arXiv
Year: 2021
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Dynamical Systems (math.DS)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 70F15 (Primary), 49K15 (Secondary)

description: In recent years, the retrieval of entire asteroids has received significant attention, with many approaches leveraging the invariant manifolds of the Circular-Restricted Three-body Problem to capture an asteroid into a periodic orbit about the $L_1$ or $L_2$ points of the Sun-Earth system. Previous works defined an `Easily Retrievable Object' (ERO) as any Near-Earth Object (NEO) which is retrievable using these invariant manifolds with an impulsive $Δv$ of less than $500$ m/s. We extend the previous literature by analysing the Pareto fronts for the EROs discovered for the first time, using high-performance computing to lift optimisation constraints used in previous literature, and modifying the method used to filter unsuitable NEOs from the NEO catalogue. In doing so, we can demonstrate that EROs have approximately the same transfer cost for almost any possible transfer time, including single-impulse transfers, which could offer significant flexibility to mission designers. We also identify $44$ EROs, of which $27$ are new, and improve on previously-known transfer solutions by up to $443$ m/s, including $17$ new capture trajectories with $Δv$ costs of less than $100$ m/s.
description: Updated to the accepted manuscript; to be published in Acta Astronautica (2021)
Understanding the radio relic emission in the galaxy cluster MACS J0717.5+3745: spectral analysis
Creators: name: Rajpurohit, K.
name: Wittor, D.
name: van Weeren, R. J.
name: Vazza, F.
name: Hoeft, M.
name: Rudnick, L.
name: Locatelli, N.
name: Eilek, J.
name: Forman, W. R.
name: Bonafede, A.
name: Bonnassieux, E.
name: Riseley, C. J.
name: Brienza, M.
name: Brunetti, G.
name: Brüggen, M.
name: Loi, F.
name: Rajpurohit, A. S.
name: Röttgering, H. J. A.
name: Botteon, A.
name: Clarke, T. E.
name: Drabent, A.
name: Domínguez-Fernández, P.
name: Di Gennaro, G.
name: Gastaldello, F.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Radio relics are diffuse, extended synchrotron sources that originate from shock fronts generated during cluster mergers. The massive merging galaxy cluster MACS J0717.5+3745 hosts one of the more complex relics known to date. We present upgraded Giant Metrewave Radio Telescope band 3 (300-500 MHz) and band 4 (550-850 MHz) observations. These new observations, combined with published VLA and the new LOFAR HBA data, allow us to carry out a detailed, high spatial resolution spectral analysis of the relic over a broad range of frequencies. The integrated spectrum of the relic closely follows a power-law between 144 MHz and 5.5 GHz with a mean spectral slope $α=-1.16\pm0.03$. Despite its complex morphology, the subregions of the relic and the other isolated filaments also follow power-law behaviors, and show similar spectral slopes. Assuming Diffusive Shock Acceleration, we estimate a dominant Mach number of $\sim 3.7$ for the shocks that make up the relic. Comparison with recent numerical simulations suggests that in the case of radio relics, the slopes of the integrated radio spectra are determined by the Mach number of the accelerating shock, with $α$ nearly constant, namely between $-1.13$ and $-1.17$, for Mach numbers $3.5 - 4.0$. The spectral shapes inferred from spatially resolved regions show curvature, we speculate that the relic is inclined along the line-of-sight. The locus of points in the simulated color-color plots changes significantly with the relic viewing angle. We conclude that projection effects and inhomogeneities in the shock Mach number dominate the observed spectral properties of the relic in this complex system. Based on the new observations we raise the possibility that the relic and a narrow-angle-tailed radio galaxy are two different structures projected along the same line-of-sight.
description: 14 pages, 12 figures
Focusing of transition radiation and diffraction radiation from concave targets
Creators: name: Potylitsyn, A. P.
name: Rezaev, R. O.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Accelerator Physics (physics.acc-ph)
subject: FOS: Physical sciences

description: In the article the transition radiation from a relativistic charge crossing a finite radius paraboloid target with taking into account the pre-wave zone effect is considered. It is shown that in this case the radiation cone narrowing occurs in contrast with the transition radiation from the flat target if the detector is situated at the distance, which is smaller than the focus distance (the focusing effect) from the target. At the charged particle passage through the central hole in a paraboloid target the diffraction radiation focusing (DR) occurs too. The focusing of coherent DR for the non-invasive measuring of the electron bunch length is proposed.
description: 11 pages, 10 figures; Talk presented at the RC2005, Frascati, Italy
D/antiD Dark Energy in String Warped Compactification
Creators: name: Piao, Yun-Song
Publisher: name: arXiv
Year: 2005
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We study the evolution of relic D3-branes after the D3/\bd-brane inflation in string warped compactification. The motion of D3-branes can be frozen under certain condition during the radiation/matter domination. These D3-branes can not be released until the D3/\bd-branes potential energy becomes dominated at late time. Subsequently they will move towards to \bd-branes, which play the role of uplifting AdS minimum to dS minimum, near the apex of throats. The annihilation of D3/\bd-branes leads to the disappearance of dS vacua. This process may be regarded as a rapid decay channel of present dS vacua. We discuss the parameter spaces required by this process and calculate the decay time.
description: 10 pages, 2 eps figures, v2 revised version to be published in PRD
title: Dagstuhl Reports, Table of Contents, Volume 7, Issue 6, 2017
Creators: name: Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Publisher: name: Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Year: 2018
Subjects: subject: Dagstuhl Reports
subject: Table of Contents
subject: Volume 7
subject: Issue 6
subject: 2017

description: Table of Contents, Frontmatter
description: Dagstuhl Reports, Volume 7, Issue 6, pages i-ii
Koerrenz, Ralf: Das Judentum als Lerngemeinschaft
Creators: name: Burkart, Rainer W.
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 42 Nr. 4 (1993): Ökumenische Rundschau, Band 42, Heft 4
Product stewardship initiatives : the case of post consumer paint in BC
Creators: name: Mugabe, Barbara Caroline
Publisher: name: University of British Columbia
Year: 2009

description: The outcomes of the paint stewardship program in British Columbia are examined to assess whether the objectives of the program and the principles of product stewardship are being achieved. The objectives are to: 1) compel the paint industry and consumers to take responsibility for waste paint; 2) minimize the volume of paint landfilled; 3) raise consumer awareness about the impacts on the environment of excessive waste generation, and the need to opt for environmentally friendly practices.' The methods of research used include secondary literature, a survey and interviews. Due to the unavailability of some crucial data, I could not carry out a proper program assessment. The following are some insights into the program: 1) waste paint collected increased from 1,300,000 equivalent litre containers in 1995 to nearly 3,000,000 in 1997. However, without knowing the volume of paint sold annually, these figures reveal little about the effectiveness of the program; 2) Of the residual paint collected in 1997, 51% was recycled into products other than paint, 30 % involved energy recovery, 11% was landfilled, while 8% was reused. I discussed the need to increase the volume of paint reused as doing so prevents the problem of waste paint from arising in the first instance. There are both benefits and flaws associated with the process of recycling. Compared to reuse, recycling does relatively little to solve the problem of waste reduction; 3) In the absence of crucial data, the objective of compelling the paint industry and consumers to take responsibility for waste paint is so far merely theoratical. The paint program is consumer funded and industry operated. In practice, a 50c ecofee/litre paint has not served as an incentive to encourage consumers to bring residuals to a depot. Nor has it resulted in meaningful changes in consumption habits. A 50c ecofee also means that paint sales will not likely be affected. It appears the industry is charging this low fee despite the fact that it does not lead to the achievements of the objectives outlined for the program. While a paint program is now in place for the processing of residual paint, the program cannot be assessed based on its objectives. To enable meaningful program evaluation, the primary recommendation is for the authorities monitoring the program to collect the relevant data over time in order improve program effectiveness.
The Massive Star Population in the Giant HII Region Tol89 in NGC5398
Creators: name: Sidoli, F.
name: Smith, L. J.
name: Crowther, P. A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present new high spectral resolution VLT/UVES spectroscopy and archival HST/STIS imaging and spectroscopy of the giant HII region Tol89 in NGC5398. From optical and UV HST images, we find that the star-forming complex as a whole contains at least seven young compact massive clusters. We resolve the two brightest optical knots, A and B, into five individual young massive clusters along our slit, A1-4 and B1 respectively. From Starburst99 (Leitherer et al.) UV spectral modelling, and nebular H beta equivalent widths in the optical, we derive ages that are consistent with the formation of two separate burst events, of ~4+/-1 Myr and <3 Myr for knots A (A1-4) and B (B1). An LMC metallicity is measured for both knots, while nebular HeII 4686 is observed in knot B and perhaps in knot A. We detect underlying broad wings on the strongest nebular emission lines indicating velocities up to 600 km/s. We estimate that there are ~95 early WN stars and ~35 early WC stars in Tol89-A, using empirical template spectra of LMC WR stars from Crowther and Hadfield. Remarkably, we also detect ~ three mid WNs in the smallest (mass) cluster in Tol89-A, A4. From the strength of nebular H beta, we obtain N(O) ~690 and 2800 for knots A and B. We also employ a complementary approach using Starburst99 models, in which the O star content is inferred from the stellar continuum, and the WR population is obtained from spectral synthesis of optical WR features using the grids from Smith et al. We find reasonable agreement between the two methods for the O star content and the N(WR)/N(O) ratio but find that the WR subtype distribution is in error in the Starburst99 models, with far too few WN stars being predicted. We attribute this failure to the neglect of rotational mixing in evolutionary models. [abridged]
description: 22 pages, 15 figures and 8 tables. Accepted by MNRAS on 2006 April 28
Gowdy $T^3$ Cosmological Models in N=1 Supergravity
Creators: name: Macias, Alfredo
name: Quevedo, Hernando
name: Sanchez, Alberto
Publisher: name: arXiv
Year: 2005
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We investigate the canonical quantization of supergravity N=1 in the case of a midisuperspace described by Gowdy $T^3$ cosmological models. The quantum constraints are analyzed and the wave function of the universe is derived explicitly. Unlike the minisuperspace case, we show the existence of physical states in midisuperspace models. The analysis of the wave function of the universe leads to the conclusion that the classical curvature singularity present in the evolution of Gowdy models is removed at the quantum level due to the presence of the Rarita-Schwinger field.
description: 25 pages and 2 figures
title: Dagstuhl Reports, Table of Contents, Volume 7, Issue 7, 2017
Creators: name: Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Publisher: name: Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Year: 2018
Subjects: subject: Dagstuhl Reports
subject: Table of Contents
subject: Volume 7
subject: Issue 7
subject: 2017

description: Table of Contents, Frontmatter
description: Dagstuhl Reports, Volume 7, Issue 7, pages i-ii
Simatupang, Tahi Bonar: Gelebte Theologie in Indonesien
Creators: name: Grohs, Gerhard
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 42 Nr. 4 (1993): Ökumenische Rundschau, Band 42, Heft 4
Lower bounds for moments of L-functions
Creators: name: Rudnick, Z.
name: Soundararajan, K.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics

description: The moments of central values of families of L-functions have recently attracted much attention and, with the work of Keating and Snaith, there are now precise conjectures for their limiting values. We develop a simple method to establish lower bounds of the conjectured order of magnitude for several such families of L-functions. As an example we work out the case of the family of all Dirichlet L-functions to a prime modulus.
Hidden-charm pentaquarks with triple strangeness due to the $Ω_{c}^{(*)}\bar{D}_s^{(*)}$ interactions
Creators: name: Wang, Fu-Lai
name: Yang, Xin-Dian
name: Chen, Rui
name: Liu, Xiang
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Motivated by the successful interpretation of these observed $P_c$ and $P_{cs}$ states under the meson-baryon molecular picture, we systematically investigate the possible hidden-charm molecular pentaquark states with triple strangeness which is due to the $Ω_{c}^{(*)}\bar{D}_s^{(*)}$ interactions. We perform a dynamical calculation of the possible hidden-charm molecular pentaquarks with triple strangeness by the one-boson-exchange model, where the $S$-$D$ wave mixing effect and the coupled channel effect are taken into account in our calculation. Our results suggest that the $Ω_{c}\bar D_s^*$ state with $J^P={3}/{2}^{-}$ and the $Ω_{c}^{*}\bar D_s^*$ state with $J^P={5}/{2}^{-}$ can be recommended as the candidates of the hidden-charm molecular pentaquark with triple strangeness. Furthermore, we discuss the two-body hidden-charm strong decay behaviors of these possible hidden-charm molecular pentaquarks with triple strangeness by adopting the quark-interchange model. These predictions are expected to be tested at the LHCb, which can be as a potential research issue with more accumulated experimental data in near future.
description: 11 pages, 3 figures and 7 tables. More discussions added. Accepted by Phys. Rev. D
Long-range potentials and $(n-1)d+ns$ molecular resonances in an ultracold rydberg gas
Creators: name: Stanojevic, J.
name: Côté, R.
name: Tong, D.
name: Eyler, E. E.
name: Gould, P. L.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We have calculated long-range molecular potentials of the $0_g^{+}$, $0_u^{-}$ and $1_u$ symmetries between highly-excited rubidium atoms. Strong $np+np$ potentials characterized by these symmetries are important in describing interaction-induced phenomena in the excitation spectra of high $np$ Rydberg states. Long-range molecular resonances are such phenomena and they were first reported in S.M. Farooqi {\it et al.}, Phys. Rev. Lett. {\bf 91} 183002. One class of these resonances occurs at energies corresponding to excited atom pairs $(n-1)d+ns$. Such resonances are attributed to $\ell$-mixing due to Rydberg-Rydberg interactions so that otherwise forbidden molecular transitions become allowed. We calculate molecular potentials in Hund's case (c), use them to find the resonance lineshape and compare to experimental results.
description: 11 pages, 7 figures
Abusive Language Detection and Characterization of Twitter Behavior
Creators: name: Davis, Dincy
name: Murali, Reena
name: Babu, Remesh
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computation and Language (cs.CL)
subject: Information Retrieval (cs.IR)
subject: FOS: Computer and information sciences

description: In this work, abusive language detection in online content is performed using Bidirectional Recurrent Neural Network (BiRNN) method. Here the main objective is to focus on various forms of abusive behaviors on Twitter and to detect whether a speech is abusive or not. The results are compared for various abusive behaviors in social media, with Convolutional Neural Netwrok (CNN) and Recurrent Neural Network (RNN) methods and proved that the proposed BiRNN is a better deep learning model for automatic abusive speech detection.
description: 7 pages, 7 figures and 8 tables
Boundary conditions at spatial infinity for fields in Casimir calculations
Creators: name: Nesterenko, V. V.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The importance of imposing proper boundary conditions for fields at spatial infinity in the Casimir calculations is elucidated.
description: 8 pages, 1 figure, submitted to the Proceedings of The Seventh Workshop QFEXT'05 (Barcelona, September 5-9, 2005)
Meccanismi di censura e rapporti di potere nelle autobiografie collaborative
Creators: name: Romeo, Caterina
Publisher: name: Università degli Studi di Cagliari
Year: 2015
Subjects: autobiografia collaborativa; letteratura postcoloniale italiana; letteratura italiana transnazionale; imperialismo culturale; affiliazioni tra donne;

description: Il genere delle autobiografie collaborative è stato oggetto di una complessa teorizzazione negli ultimi decenni, soprattutto in ambito statunitense, ed è il genere che più di altri segna l'inizio, nei primi anni Novanta, della letteratura postcoloniale italiana e l’incontro linguistico e culturale tra migranti e culture di “accoglienza.” Il presente saggio intende indagare i rapporti di potere presenti all'interno delle autobiografie collaborative e i meccanismi di censura e autocensura operati nella costruzione del testo. Il saggio mette in discussione la presunta trasparenza del ruolo dell'editor e analizza come il rapporto tra narratore ed editor sia al contempo un rapporto di collaborazione e solidarietà, ma anche di sfruttamento coloniale e resistenza postcoloniale.

Partendo da una riflessione sui due termini "autobiografia" e "collaborativa" – apparentemente aproblematici ma in realtà fortemente problematici – questo saggio sviluppa un'analisi delle questioni che questo genere letterario pone dal punto di vista teorico – scissione della posizione autoriale, e quindi dell’autorità del soggetto che scrive, rapporti di potere all’interno della collaborazione, censure operate, questioni etiche e rapporti con la critica, resistenza postcoloniale alle grandi narrazioni e riscrittura della storia.

L'impianto teorico del presente saggio è costruito soprattutto a partire da testi statunitensi (dagli studi sul testimonio di John Beverley, a quelli sui rapporti di collaborazione come rapporti di sorellanza femminista di Caren Kaplan, agli studi sulle autobiografie native americane). Per quanto riguarda i testi presi in esame, la presente analisi mette a confronto due coppie di testi. I primi due sono l’autobiografia di Nassera Chohra, Volevo diventare bianca (con Alessandra Atti Di Sarro, 1993) e un’importante autobiografia collaborativa italoamericana, Rosa: Life of an Italian Immigrant (con Marie Hall Ets, 1970). Gli altri due sono testi che segnano l’inizio della letteratura postcoloniale italiana: quali Pap Khouma, Io, venditore di elefanti (con Oreste Pivetta, 1990) e Salah Methnani, Immigrato (con Mario Fortunato, 1990).
description: Between, Vol 5, N° 9 (2015): Censura e auto-censura
Molecular dynamics lattice gas equilibrium distribution function for Lennard-Jones particles
Creators: name: Pachalieva, Aleksandra
name: Wagner, Alexander J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: The molecular dynamics lattice gas method maps a molecular dynamics simulation onto a lattice gas using a coarse-graining procedure. This is a novel fundamental approach to derive the lattice Boltzmann method by taking a Boltzmann average over the molecular dynamics lattice gas. A key property of the lattice Boltzmann method is the equilibrium distribution function, which was originally derived by assuming that the particle displacements in the molecular dynamics simulation are Boltzmann distributed. However, we recently discovered that a single Gaussian distribution function is not sufficient to describe the particle displacements in a broad transition regime between free particles and particles undergoing many collisions in one time step. In a recent publication, we proposed a Poisson weighted sum of Gaussians which shows better agreement with the molecular dynamics data. We derive a lattice Boltzmann equilibrium distribution function from the Poisson weighted sum of Gaussians model and compare it to a measured equilibrium distribution function from molecular dynamics data and to an analytical approximation of the equilibrium distribution function from a single Gaussian probability distribution function.
description: 14 pages, 5 figures
title: Dagstuhl Reports, Table of Contents, Volume 7, Issue 8, 2017
Creators: name: Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Publisher: name: Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Year: 2018
Subjects: subject: Dagstuhl Reports
subject: Table of Contents
subject: Volume 7
subject: Issue 8
subject: 2017

description: Table of Contents, Frontmatter
description: Dagstuhl Reports, Volume 7, Issue 8, pages i-ii
Mapping the Shores of the Brown Dwarf Desert I.: Upper Scorpius
Creators: name: Kraus, Adam L.
name: Ireland, Michael J.
name: Martinache, Frantz
name: Lloyd, James P.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present the results of a survey for stellar and substellar companions to 82 young stars in the nearby OB association Upper Scorpius. This survey used nonredundant aperture-mask interferometry to achieve typical contrast limits of DeltaK~5-6 at the diffraction limit, revealing 12 new binary companions that lay below the detection limits of traditional high-resolution imaging; we also summarize a complementary snapshot imaging survey that discovered 7 directly resolved companions. The overall frequency of binary companions (~35+5/-4% at separations of 6-435 AU) appears to be equivalent to field stars of similar mass, but companions could be more common among lower-mass stars than for the field. The companion mass function has statistically significant differences compared to several suggested mass functions for the field, and we suggest an alternate log-normal parameterization of the mass-function. Our survey limits encompass the entire brown dwarf mass range, but we only detected a single companion that might be a brown dwarf; this deficit resembles the so-called ``brown dwarf desert'' that has been observed by radial-velocity planet searches. Finally, our survey's deep detection limits extend into the top of the planetary mass function, reaching 8-12 MJup for half of our sample. We have not identified any planetary companions at high confidence (>99.5%), but we have identified four candidate companions at lower confidence (>97.5%) that merit additional followup to confirm or disprove their existence.
description: Accepted to ApJ; 23 pages, 7 figures, 9 tables in emulateapj format
Quality of the jurassic-cretaceous Mist Mountain formation coals, southern Canadian cordillera: relationships to sedimentology and coalbed methane potential
Creators: name: Vessey, Sarah Jane
Publisher: name: University of British Columbia
Year: 2009

description: A detailed investigation of the Jurassic-Cretaceous Mist Mountain Formation in the southern Canadian Cordillera was undertaken to determine what, if any relationships exist between coal quality parameters, stratigraphic stacking, depositional environment and coalbed methane potential. In the Line Creek area, a shift in depositional environment within the Mist Mountain Formation is recorded as a change in abundance and lateral continuity of lithofacies. The lower part of the formation was deposited in an interdeltaic coastal plain environment and is typified by alternation of laterally extensive coal seams and thick, widespread channel sandstones. In the upper Mist Mountain Formation, channel sandstones are replaced by an increasing abundance of thin coal seams, floodplain and crevasse splay facies sediments. The upper unit was deposited in a distal alluvial-fluvial floodplain environment. Coal seam geometry and quality data indicate that Mist Mountain Formation peat mires were not directly influenced by contemporaneous clastic sedimentation. The geometry of coal seams reflects the proximity of under- and overlying channel sandstones, but ash content and mineralogy of the coal do not parallel changes in thickness, proximity or composition of surrounding clastic sediments. Examination of lower unit characteristics suggests that peat mires developed only during breaks in clastic deposition; the upper unit coal appears to have formed in domed mires, raised above active clastic sedimentation. Mist Mountain Formation coals are of suitable rank and composition to host significant coalbed methane reserves, but exploration to date indicates only limited volumes of gas. The coal is commonly sheared and oxidised, features which generally enhance the permeability of coal, yet the effect of these factors on coalbed methane potential is not understood. Results from this investigation indicate greater volumes of methane are adsorbed with increasing vitrinite content in the Mist Mountain Formation coals. Additionally, oxidised coals have decreased methane adsorption capacity. The effects of maceral composition and oxidation on methane adsorption overshadow the effect of shearing. Groundwater is likely to travel preferentially through sheared and oxidised coal due to increased permeability, facilitating methane desorption and escape from the coal. It is probable that a combination of decreased adsorption due to oxidation and leakage of methane from sheared and oxidised zones account for the low volumes of methane in Mist Mountain Formation coals.
Fantasy and Censorship: Dino Buzzati’s correspondence from Italian colonies
Creators: name: Schiavon, Francesco
Publisher: name: Università degli Studi di Cagliari
Year: 2015
Subjects: Journalism; non-fiction; fiction; censorship; self-censorship; colonialism; post-colonialism

description: The aim of my contribution is to study the role and influence of Fascist censorship in the journalistic articles that Dino Buzzati wrote from tha Italian colonies for the Corriere della Sera between 1933 and 1940. The articles are collected in the volume L’Africa di Buzzati.

By placing Buzzati’s work in a precise historical framework and discussing the problem of his ‘orientalism’, the article demonstrates that Buzzati’s work from Africa can be read as a document of Italian colonialism and that it confirmed, in terms of stereotypes and prejudices, not only the attitude of ‘the West’ towards North African peoples, but also his bias against cultural and social realities which were distant from the ones he was familiar with.

In terms of politics and ideology, the texts of Il Buttafuoco are difficult to decipher, especially with reference to the problem of racism. Buzzati’s narrative was determined not only by the influence of Fascist censorship but also by his aesthetic choices. In particular, the role of space played by the desert, the preference for anti-heroic figures and the diffuse use of imagination show the complexity of the relationship between Buzzati and political power, but also the originality in the way Buzzati used these figures to build a symbolism around the represented reality.
description: Between, Vol 5, N° 9 (2015): Censura e auto-censura
On iterative methods for solving ill-posed problems modeled by PDE's
Creators: name: Baumeister, J.
name: Leitao, A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics
subject: 65J20, 47A52

description: We investigate the iterative methods proposed by Maz'ya and Kozlov (see [KM1], [KM2]) for solving ill-posed inverse problems modeled by partial differential equations. We consider linear evolutionary problems of elliptic, hyperbolic and parabolic types. Each iteration of the analyzed methods consists in the solution of a well posed problem (boundary value problem or initial value problem respectively). The iterations are described as powers of affine operators, as in [KM2]. We give alternative convergence proofs for the algorithms by using spectral theory and the fact that the linear parts of these affine operators are non-expansive with additional functional analytical properties (see [Le1,2]). Also problems with noisy data are considered and estimates for the convergence rate are obtained under a priori regularity assumptions on the problem data.
description: 14 pages, 3 figures
Handling EEG artifacts and searching individually optimal experimental parameter in real time: a system development and demonstration
Creators: name: Ouyang, Guang
name: Dien, Joseph
name: Lorenz, Romy
Publisher: name: Apollo - University of Cambridge Repository
Year: 2022
Subjects: Paper
bayesian optimization
neuroadaptive research
EEG artifacts
event-related potentials

description: Abstract: Objective. Neuroadaptive paradigms that systematically assess event-related potential (ERP) features across many different experimental parameters have the potential to improve the generalizability of ERP findings and may help to accelerate ERP-based biomarker discovery by identifying the exact experimental conditions for which ERPs differ most for a certain clinical population. Obtaining robust and reliable ERPs online is a prerequisite for ERP-based neuroadaptive research. One of the key steps involved is to correctly isolate electroencephalography artifacts in real time because they contribute a large amount of variance that, if not removed, will greatly distort the ERP obtained. Another key factor of concern is the computational cost of the online artifact handling method. This work aims to develop and validate a cost-efficient system to support ERP-based neuroadaptive research. Approach. We developed a simple online artifact handling method, single trial PCA-based artifact removal (SPA), based on variance distribution dichotomies to distinguish between artifacts and neural activity. We then applied this method in an ERP-based neuroadaptive paradigm in which Bayesian optimization was used to search individually optimal inter-stimulus-interval (ISI) that generates ERP with the highest signal-to-noise ratio. Main results. SPA was compared to other offline and online algorithms. The results showed that SPA exhibited good performance in both computational efficiency and preservation of ERP pattern. Based on SPA, the Bayesian optimization procedure was able to quickly find individually optimal ISI. Significance. The current work presents a simple yet highly cost-efficient method that has been validated in its ability to extract ERP, preserve ERP effects, and better support ERP-based neuroadaptive paradigm.
Universes as Big Data
Creators: name: He, Yang-Hui
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Algebraic Geometry (math.AG)
subject: History and Philosophy of Physics (physics.hist-ph)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We briefly overview how, historically, string theory led theoretical physics first to precise problems in algebraic and differential geometry, and thence to computational geometry in the last decade or so, and now, in the last few years, to data science. Using the Calabi-Yau landscape -- accumulated by the collaboration of physicists, mathematicians and computer scientists over the last 4 decades -- as a starting-point and concrete playground, we review some recent progress in machine-learning applied to the sifting through of possible universes from compactification, as well as wider problems in geometrical engineering of quantum field theories. In parallel, we discuss the programme in machine-learning mathematical structures and address the tantalizing question of how it helps doing mathematics, ranging from mathematical physics, to geometry, to representation theory, to combinatorics, and to number theory.
description: 32 pages, 3 figures. Invited review for IJMPA, based on various colloquia, seminars and conference talks in the 2019-2020 academic year
Returning Home, A Creative Exploration of Self
Creators: name: Bardsley, Larisa
Publisher: name: Zenodo
Year: 2018
Subjects: subject: autoethnography
subject: creative research
subject: art based research
subject: organic enquiry
subject: PhD
subject: Self
subject: Psychology
subject: FOS: Psychology
subject: transpersonal psychology
subject: eng

description: Postmodern theory indicates that a self-reflexive voice is a valid expression of

cultural and temporal influences on language and meaning making. Transpersonal

theories propose that ‘self’ is multiple and layered, some aspects of consciousness

are more easily accessed, others, deeply held and previously unconscious. Narrative

is intricately embedded in human experience and is a potent means of shaping selfidentity,

imbuing meaning, facilitating insight and transforming awareness. The

creative arts form a unique, evocative means of investigating and expressing

emergent narratives, conveying meaning and facilitating individual and collective

transformation. This creative, practice-led investigation explores the question: Who

are we? Utilising an embodied and transpersonal methodology, a woman, artist and

depth psychologist investigates the nature of self. The creative findings include fine

art, photography, life-writing, a short film, an art novel and an exhibition. The

researcher’s auto-ethnographic reflections discuss the impact of making the works,

conclusions regarding their ramifications for understanding the nature of self, and

their transformational potential. Returning Home alludes to the sense of cultivating a

state of awareness where it is possible to compassionately witness the narratives of

many selves, as well as the personal and global implications of doing so.
Direct observation of t2g orbital ordering in magnetite
Creators: name: Schlappa, J.
name: Schuessler-Langeheine, C.
name: Chang, C. F.
name: Ott, H.
name: Tanaka, A.
name: Hu, Z.
name: Haverkort, M. W.
name: Schierle, E.
name: Weschke, E.
name: Kaindl, G.
name: Tjeng, L. H.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Using soft-x-ray diffraction at the site-specific resonances in the Fe L23 edge, we find clear evidence for orbital and charge ordering in magnetite below the Verwey transition. The spectra show directly that the (001/2) diffraction peak (in cubic notation) is caused by t2g orbital ordering at octahedral Fe2+ sites and the (001) by a spatial modulation of the t2g occupation.
description: to appear in Phys. Rev. Lett
title: Dagstuhl Reports, Table of Contents, Volume 7, Issue 9, 2017
Creators: name: Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Publisher: name: Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Year: 2018
Subjects: subject: Dagstuhl Reports
subject: Table of Contents
subject: Volume 7
subject: Issue 9
subject: 2017

description: Table of Contents, Frontmatter
description: Dagstuhl Reports, Volume 7, Issue 9, pages i-ii
A Morphological Study of Gamma-Ray Burst Host Galaxies
Creators: name: Wainwright, C.
name: Berger, E.
name: Penprase, B. E.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present a comprehensive study of the morphological properties of 42 gamma-ray burst (GRB) host galaxies imaged with the Hubble Space Telescope in the optical band. The purpose of this study is to understand the relation of GRBs to their macro-environments, and to compare the GRB-selected galaxies to other high redshift samples. We perform both qualitative and quantitative analyses by categorizing the galaxies according to their visual properties, and by examining their surface brightness profiles. We find that all of the galaxies have approximately exponential profiles, indicative of galactic disks, and have a median scale length of about 1.7 kpc. Inspection of the visual morphologies reveals a high fraction of merging and interacting systems, with \~30% showing clear signs of interaction, and an additional ~30% exhibiting irregular and asymmetric structure which may be the result of recent mergers; these fractions are independent of redshift and galaxy luminosity. On the other hand, the three GRB host galaxies for which submillimeter and radio emission has been detected are isolated and compact, unlike the luminous submillimeter-selected galaxies. The fraction of mergers appears to be elevated compared to other high redshift samples, particularly for the low luminosities of GRB hosts (M_B ~ -16 to -21 mag). This suggests that merging and interacting galaxies undergoing a burst of star formation may be an efficient site for the production of GRB progenitors. Finally, we show that GRB hosts clearly follow the size-luminosity relation present in other galaxy samples, but thanks to absorption redshifts they help extend this relation to lower luminosities.
description: Submitted to ApJ; 7 figures; 2 tables
Claudia Scandura (ed.), La poesia russa da Puškin a Brodskij. E ora?
Creators: name: Dammiano, Enza
Publisher: name: Università degli Studi di Cagliari
Year: 2015

description: «Nonostante il lusinghiero giudizio espresso da Majakovskij e da Jakobson», scrive la curatrice nel contributo conclusivo alla miscellanea, «la poesia russa non è particolarmente conosciuta o apprezzata in Occidente: i romanzi di Dostoevskij e Tolstoj e il teatro di Čechov sono molto più noti dei poemi di Puškin o di Lermontov e di Pasternak tutti ricordano il romanzo Il dottor Živago […] e non i versi, ed è anzi difficile trovare qualcuno fuori dalla Russia che lo conosca come poeta. Dello stesso Brodskij, beniamino delle élites intellettuali europee e di oltreoceano, si apprezza (e si vende) molto più la prosa che la poesia» (336). L’obiettivo del volume, che accoglie gli Atti del Convegno Internazionale La poesia russa da Puškin a Brodskij. E ora?, tenutosi a Roma dal 29 al 30 settembre 2011, sembra risiedere proprio nel recupero della tradizione poetica russa e nella ricerca di un riscatto del suo stesso statuto nell’ambito della ricezione occidentale, ma non solo.
description: Between, Vol 5, N° 9 (2015): Censura e auto-censura