cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Manifold Reconstruction and Denoising from Scattered Data in High Dimension via a Generalization of $L_1$-Median
Creators: name: Faigenbaum-Golovin, Shira
name: Levin, David
Publisher: name: arXiv
Year: 2020
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics
subject: G.1.2
subject: 65D99

description: In this paper, we present a method for denoising and reconstruction of low-dimensional manifold in high-dimensional space. We suggest a multidimensional extension of the Locally Optimal Projection algorithm which was introduced by Lipman et al. in 2007 for surface reconstruction in 3D. The method bypasses the curse of dimensionality and avoids the need for carrying out dimensional reduction. It is based on a non-convex optimization problem, which leverages a generalization of the outlier robust L1-median to higher dimensions while generating noise-free quasi-uniformly distributed points reconstructing the unknown low-dimensional manifold. We develop a new algorithm and prove that it converges to a local stationary solution with a bounded linear rate of convergence in case the starting point is close enough to the local minimum. In addition, we show that its approximation order is $O(h^2)$, where $h$ is the representative distance between the given points. We demonstrate the effectiveness of our approach by considering different manifold topologies with various amounts of noise, including a case of a manifold of different co-dimensions at different locations.
Validity conditions for moment closure approximations in stochastic chemical kinetics
Creators: name: Schnoerr, David
name: Sanguinetti, Guido
name: Grima, Ramon
Publisher: name: arXiv
Year: 2014
Subjects: subject: Molecular Networks (q-bio.MN)
subject: Biological Physics (physics.bio-ph)
subject: Chemical Physics (physics.chem-ph)
subject: Quantitative Methods (q-bio.QM)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: Approximations based on moment-closure (MA) are commonly used to obtain estimates of the mean molecule numbers and of the variance of fluctuations in the number of molecules of chemical systems. The advantage of this approach is that it can be far less computationally expensive than exact stochastic simulations of the chemical master equation. Here we numerically study the conditions under which the MA equations yield results reflecting the true stochastic dynamics of the system. We show that for bistable and oscillatory chemical systems with deterministic initial conditions, the solution of the MA equations can be interpreted as a valid approximation to the true moments of the CME, only when the steady-state mean molecule numbers obtained from the chemical master equation fall within a certain finite range. The same validity criterion for monostable systems implies that the steady-state mean molecule numbers obtained from the chemical master equation must be above a certain threshold. For mean molecule numbers outside of this range of validity, the MA equations lead to either qualitatively wrong oscillatory dynamics or to unphysical predictions such as negative variances in the molecule numbers or multiple steady-state moments of the stationary distribution as the initial conditions are varied. Our results clarify the range of validity of the MA approach and show that pitfalls in the interpretation of the results can only be overcome through the systematic comparison of the solutions of the MA equations of a certain order with those of higher orders.
description: 27 pages, 13 figures; accepted at Journal of Chemical Physics
Instantons near a tachyonic top in anti de Sitter and the no-boundary regulator
Creators: name: Lee, Bum-Hoon
name: Lee, Wonwoo
name: Ro, Daeho
name: Yeom, Dong-han
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We investigate instantons near a tachyonic top in an anti de Sitter (AdS) background. If the mass scale around the hill-top is above the Breitenlohner-Freedman (BF) bound, then the top is classically stable. When the BF bound is satisfied, it is already known that there can exist instantons with a non-zero probability, though fine-tunings of the potential are required. On the other hand, we may consider a possibility to obtain instantons with a non-zero probability for more natural shape of potentials. We found that the no-boundary regulator is useful to assign a non-zero probability for general instantons near the tachyonic top with a consistent framework. To use the no-boundary regulator, we need to introduce the complexification of fields. One interesting feature is that, for these AdS instantons, the classicality may not be satisfied after the Wick rotation and hence after the nucleation. This magnifies a novel difference between dS and AdS; a semi-classical boundary observer in AdS may notice the dispersion of quantum fields as a kind of uncertainty, while every semi-classical observers in dS are classicalized individually and hence there is no semi-classical observer who can see the quantum dispersion of the scalar field.
description: 18 pages, 6 figures
Content validity and psychometric properties of the German version of the Long COVID Impact Tool: Protocol for a validation study
Creators: name: Piontek, Katharina
name: Ann-Kristin Baalmann
name: Apfelbacher, Christian
Publisher: name: OSF Registries
Year: 2023
Subjects: subject: Medicine and Health Sciences
subject: content validity
subject: patient-reported outcome measures
subject: post COVID-19 condition
subject: psychometric properties

description: Translation, content validation and psychometric validation study of a patient-reported outcome measure for post COVID-19 condition
Disproportionality analysis of adverse neurological and psychiatric reactions with the ChAdOx1 (Oxford-AstraZeneca) and BNT162b2 (Pfizer-BioNTech) COVID-19 vaccines in the United Kingdom
Creators: name: Otero-Losada, Matilde
name: Petrovsky, Nikolai
name: Alami, Abdallah
name: Crispo, James A.
name: Mattison, Donald
name: Capani, Francisco
name: Goetz, Christopher
name: Krewski, Daniel
name: Perez-Lloret, Santiago
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Medicine
subject: Genetics
subject: FOS: Biological sciences
subject: Neuroscience
subject: Physiology
subject: Pharmacology
subject: Biotechnology
subject: Immunology
subject: FOS: Clinical medicine
subject: Mental Health
subject: Infectious Diseases
subject: FOS: Health sciences

description: Information on neurological and psychiatric adverse events following immunization (AEFIs) with COVID-19 vaccines is limited. We examined and compared neurological and psychiatric AEFIS reports related to BNT162b2 (Pfizer-BioNTech) and ChAdOx1 (Oxford-AstraZeneca) COVID-19 vaccines and recorded in the United Kingdom Medicines and Healthcare products Regulatory Agency between 9 December 2020 and 30 June 2021. As of 30 June 2021, 46.1 million doses of ChAdOx1 and 30.3 million doses of BNT162b2 had been administered. The most frequently reported AEFI was headache with 1,686 and 575 cases per million doses of ChAdOx1 and BNT162b2, respectively. AEFIs more frequently reported after CHAdOx1 compared with BNT162b2 vaccination were Guillain-Barré syndrome (OR, 95% CI = 2.53, 1.82–3.51), freezing (6.66, 3.12–14.22), cluster headache (1.53, 1.28–1.84), migraine (1.23,1.17–1.30), postural dizziness (1.24,1.13–1.37), tremor (2.86, 2.68–3.05), headache (1.40, 1.38–1.43), paresthesia (1.11, 1.06–1.16), delirium (1.85, 1.45–2.36), hallucination (2.20, 1.82–2.66), poor quality sleep (1.53, 1.26–1.85), and nervousness (1.54, 1.26–1.89) Reactions less frequently reported with ChAdOx1 than with BNT162b2 were Bell’s palsy (0.47, 0.41–0.55), anosmia (0.58, 0.47–0.71), facial paralysis (0.35, 0.29–0.41), dysgeusia (0.68, 0.62–0.73), presyncope (0.48, 0.42–0.55), syncope (0.63, 0.58–0.67), and anxiety (0.75 (0.67–0.85). Neurological and psychiatric AEFIs were relatively infrequent, but each vaccine was associated with a distinctive toxic profile. We examined reports on adverse neurological and psychiatric effects following immunization with BNT162b2 (Pfizer-BioNTech) and ChAdOx1 (Oxford-AstraZeneca) for COVID-19 to the United Kingdom Medicines and Healthcare products Regulatory Agency between 9 December 2020 and 30 June 2021. Adverse effects following immunization (AEFIs) were relatively infrequent. Compared to BNT162b2, Guillain-Barré syndrome, freezing phenomenon, cluster headache, migraine, postural dizziness, tremor, headache, paresthesia, delirium, hallucination, poor quality sleep, and nervousness were more frequently reported for ChAdOx1. Reactions less frequently reported for ChAdOx1 than for BNT162b2 were Bell’s palsy, anosmia, facial paralysis, dysgeusia, presyncope, syncope, and anxiety.
Universal dynamic scaling in chemical reactions at and away from equilibrium
Creators: name: Mondal, Shrabani
name: Greenberg, Jonah S.
name: Green, Jason R.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: Physical kinetic roughening processes are well known to exhibit universal scaling of observables that fluctuate in space and time. Are there analogous dynamic scaling laws that are unique to the chemical reaction mechanisms available synthetically and occurring naturally? Here, we formulate two complementary approaches to the dynamic scaling of stochastic fluctuations in thermodynamic observables at and away from equilibrium. Both analytical expressions and numerical simulations confirm our dynamic scaling ans{ä}tze with their associated exponents, functions, and laws. A survey of common chemical mechanisms reveals classes that organize according to the molecularity of the reactions involved, the nature of the reaction vessel and external reservoirs, (non)equilibrium conditions, and the extent of autocatalysis in the reaction network. Coupled reactions capable of chemical feedback can transition, sometimes sharply, between these classes with the variation of experimental parameters such as temperature. While path observables like the dynamical activity have scaling exponents that are time-independent, fluctuations in the entropy production and flow can have time-dependent scaling exponents and self-averaging properties as a result of temporal correlations that emerge during thermodynamically irreversible processes. Altogether, these results establish dynamic universality in the nonequilibrium fluctuations of thermodynamic observables for well-mixed chemical reactions.
Simultaneous Diagonalization of Conics in $PG(2,q)$
Creators: name: Kusejko, Katharina
Publisher: name: arXiv
Year: 2014
Subjects: subject: Combinatorics (math.CO)
subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics

description: Consider two symmetric $3 \times 3$ matrices $A$ and $B$ with entries in $GF(q)$, for $q=p^n$, $p$ an odd prime. The zero sets of $v^T Av$ and $v^T Bv$ can be viewed as (possibly degenerate) conics in the finite projective coordinate plane of order $q$. Using combinatorial properties of pencils of conics in $PG(2,q)$, we are able to tell when it is possible to find a nonsingular matrix $S$ with entries in $GF(q)$, such that $S^T A S$ and $S^T BS$ are both diagonal matrices. This is equivalent to the existence of a collineation mapping two given conics into conics with matrices in diagonal form. For two proper conics, we will in particular compare the situation in $PG(2,q)$ to the real projective plane and point out some differences.
description: 15 pages; To appear in Des. Codes Cryptogr
PATIENT-REPORTED OUTCOME MEASURES FOR ACUTE BRONCHITIS AND ACUTE COUGH: PROTOCOL FOR A SYSTEMATIC REVIEW
Creators: name: Apfelbacher, Christian
name: Nestler, Sophie
name: Ann-Kristin Baalmann
name: Piontek, Katharina
Publisher: name: OSF Registries
Year: 2023
Subjects: subject: Medicine and Health Sciences
subject: COSMIN
subject: acute bronchitis
subject: acute cough
subject: patient-reported outcome measures

description: Systematic review according to the COSMIN guideline for systematic reviews of patient-reported outcome measures
Deep reinforcement learning for quantum Hamiltonian engineering
Creators: name: Peng, Pai
name: Huang, Xiaoyang
name: Yin, Chao
name: Joseph, Linta
name: Ramanathan, Chandrasekhar
name: Cappellaro, Paola
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Atomic and Molecular Clusters (physics.atm-clus)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: Engineering desired Hamiltonian in quantum many-body systems is essential for applications such as quantum simulation, computation and sensing. Conventional quantum Hamiltonian engineering sequences are designed using human intuition based on perturbation theory, which may not describe the optimal solution and is unable to accommodate complex experimental imperfections. Here we numerically search for Hamiltonian engineering sequences using deep reinforcement learning (DRL) techniques and experimentally demonstrate that they outperform celebrated sequences on a solid-state nuclear magnetic resonance quantum simulator. As an example, we aim at decoupling strongly-interacting spin-1/2 systems. We train DRL agents in the presence of different experimental imperfections and verify robustness of the output sequences both in simulations and experiments. Surprisingly, many of the learned sequences exhibit a common pattern that had not been discovered before, to our knowledge, but has an meaningful analytical description. We can thus restrict the searching space based on this control pattern, allowing to search for longer sequences, ultimately leading to sequences that are robust against dominant imperfections in our experiments. Our results not only demonstrate a general method for quantum Hamiltonian engineering, but also highlight the importance of combining black-box artificial intelligence with understanding of physical system in order to realize experimentally feasible applications.
description: 20 pages, 10+6 figures, 1+2 tables
Stigma and Personality Disorders: A scoping review protocol
Creators: name: De Vries, Caroline
name: Van Schie, Charlotte
Publisher: name: OSF Registries
Year: 2023
Subjects: subject: Mental Disorders
subject: Clinical Psychology
subject: Psychiatry and Psychology
subject: Medicine and Health Sciences
subject: Social and Behavioral Sciences
subject: Psychology
subject: FOS: Psychology
subject: mental disorders
subject: personality disorder
subject: psychiatry
subject: psychology
subject: stigma

description: A scoping review on stigma and personality disorders.
Anomalous thermoelectric transport phenomena from interband electron-phonon scattering
Creators: name: Fedorova, Natalya S.
name: Cepellotti, Andrea
name: Kozinsky, Boris
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The Seebeck coefficient and electrical conductivity are two critical quantities to optimize simultaneously in designing thermoelectric materials, and they are determined by the dynamics of carrier scattering. We uncover a new regime where the co-existence at the Fermi level of multiple bands with different effective masses leads to strongly energy-dependent carrier lifetimes due to intrinsic electron-phonon scattering. In this anomalous regime, electrical conductivity decreases with carrier concentration, Seebeck coefficient reverses sign even at high doping, and power factor exhibits an unusual second peak. We discuss the origin and magnitude of this effect using first-principles Boltzmann transport calculations and simplified models. We also identify general design rules for using this paradigm to engineer enhanced performance in thermoelectric materials.
description: 11 pages, 7 figures
Atmospheric dynamics of terrestrial exoplanets over a wide range of orbital and atmospheric parameters
Creators: name: Kaspi, Yohai
name: Showman, Adam P.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: The recent discoveries of terrestrial exoplanets and super-Earths extending over a broad range of orbital and physical parameters suggest that these planets will span a wide range of climatic regimes. Characterization of the atmospheres of warm super-Earths has already begun and will be extended to smaller and more distant planets over the coming decade. The habitability of these worlds may be strongly affected by their three-dimensional atmospheric circulation regimes, since the global climate feedbacks that control the inner and outer edges of the habitable zone including transitions to Snowball-like states and runaway-greenhouse feedbacks depend on the equator-to-pole temperature differences, patterns of relative humidity, and other aspects of the dynamics. Here, using an idealized moist atmospheric general circulation model including a hydrological cycle, we study the dynamical principles governing the atmospheric dynamics on such planets. We show how the planetary rotation rate, stellar flux, atmospheric mass, surface gravity, optical thickness, and planetary radius affect the atmospheric circulation and temperature distribution on such planets. Our simulations demonstrate that equator-to-pole temperature differences, meridional heat transport rates, structure and strength of the winds, and the hydrological cycle vary strongly with these parameters, implying that the sensitivity of the planet to global climate feedbacks will depend significantly on the atmospheric circulation. We elucidate the possible climatic regimes and diagnose the mechanisms controlling the formation of atmospheric jet streams, Hadley and Ferrel cells, and latitudinal temperature differences. Finally, we discuss the implications for understanding how the atmospheric circulation influences the global climate.
description: 18 pages, 20 figures, published in ApJ 804:60
Culminating the peak CUSP to descry the dark side of halos
Creators: name: Salvador-Solé, Eduard
name: Manrique, Alberto
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The ConflUent System of Peak trajectories (CUSP) is a rigorous formalism in the framework of the peak theory that allows one to derive from first principles andno free parameters the typical halo properties from the statistics of peaks in the filtered Gaussian random field of density perturbations. The predicted halo mass function, spherically averaged density, velocity dispersion, velocity anisotropy, ellipticity, prolateness and potential profiles, as well as the abundance and number density profiles of accreted and stripped subhalos and diffuse dark matter accurately recover the results of cosmological $N$-body simulations. CUSP is thus a powerful tool for the calculation, in any desired hierarchical cosmology with Gaussian perturbations, of halo properties beyond the mass, redshift and radial ranges covered by simulations. More importantly, CUSP unravels the origin of the characteristic features of those properties. In the present Paper we culminate its construction. We show that all halo properties but those related with subhalo stripping are independent of the assembly history of those objects, and that the Gaussian is the only smoothing window able to find the finite collapsing patches while properly accounting for the entropy increase produced in major mergers.
description: 22 pages, 6 figures. Published in the ApJ. Minor corrections with respect to the published version
Incompleteness of the large-$N$ analysis of the $O(N)$ models: Nonperturbative cuspy fixed points and their nontrivial homotopy at finite $N$
Creators: name: Yabunaka, Shunsuke
name: Fleming, Claude
name: Delamotte, Bertrand
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We summarize the usual implementations of the large $N$ limit of $O(N)$ models and show in detail why and how they can miss some physically important fixed points when they become singular in the limit $N\to\infty$. Using Wilson's renormalization group in its functional nonperturbative versions, we show how the singularities build up as $N$ increases. In the Wilson-Polchinski version of the nonperturbative renormalization group, we show that the singularities are cusps, which become boundary layers for finite but large values of $N$. The corresponding fixed points being never close to the Gaussian, are out of reach of the usual perturbative approaches. We find four new fixed points and study them in all dimensions and for all $N>0$ and show that they play an important role for the tricritical physics of $O(N)$ models. Finally, we show that some of these fixed points are bi-valued when they are considered as functions of $d$ and $N$ thus revealing important and nontrivial homotopy structures. The Bardeen-Moshe-Bander phenomenon that occurs at $N=\infty$ and $d=3$ is shown to play a crucial role for the internal consistency of all our results.
description: 20 pages, 17 figures
A finite-time exponent for random Ehrenfest gas
Creators: name: Moudgalya, Sanjay
name: Chandra, Sarthak
name: Jain, Sudhir R.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We consider the motion of a system of free particles moving on a plane with regular hard polygonal scatterers arranged in a random manner. Calling this the Ehrenfest gas, which is known to have a zero Lyapunov exponent, we propose a finite-time exponent to characterize its dynamics. As the number of sides of the polygon goes to infinity, when polygon tends to a circle, we recover the usual Lyapunov exponent for the Lorentz gas from the exponent proposed here. To obtain this result, we generalize the reflection law of a beam of rays incident on a polygonal scatterer in a way that the formula for the circular scatterer is recovered in the limit of infinite number of vertices. Thus, chaos emerges from pseudochaos in an appropriate limit.
description: 15 pages, 8 figures; Accepted for publication at Annals of Physics
Ultrafilter selection and Corson compacta
Creators: name: Bonnet, Robert
name: Kubiś, Wieslaw
name: Todorčević, Stevo
Publisher: name: arXiv
Year: 2021
Subjects: subject: Logic (math.LO)
subject: General Topology (math.GN)
subject: FOS: Mathematics
subject: Primary: 06E15, 54D30. Secondary: 03G10, 54A25

description: We study the question which Boolean algebras have the property that for every generating set there is an ultrafilter selecting maximal number of its elements. We call it the ultrafilter selection property. For cardinality aleph-one the property is equivalent to the fact that the space of ultrafilters is not Corson compact. We also consider the pointwise topology on a Boolean algebra, proving a result on the Lindelöf number in the context of the ultrafilter selection property. Finally, we discuss poset Boolean algebras, interval algebras, and semilattices in the context of ultrafilter selection properties.
description: Some corrections and clarifications, 33 pages
Past and future sea-level rise along the coast of North Carolina, USA
Creators: name: Kopp, Robert E.
name: Horton, Benjamin P.
name: Kemp, Andrew C.
name: Tebaldi, Claudia
Publisher: name: arXiv
Year: 2014
Subjects: subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: Geophysics (physics.geo-ph)
subject: FOS: Physical sciences

description: We evaluate relative sea level (RSL) trajectories for North Carolina, USA, in the context of tide-gauge measurements and geological sea-level reconstructions spanning the last $\mathord{\sim}$11,000 years. RSL rise was fastest ($\mathord{\sim}$7 mm/yr) during the early Holocene and slowed over time with the end of the deglaciation. During the pre-Industrial Common Era (i.e., 0--1800 CE), RSL rise ($\mathord{\sim}$0.7 to 1.1 mm/yr) was driven primarily by glacio-isostatic adjustment, though dampened by tectonic uplift along the Cape Fear Arch. Ocean/atmosphere dynamics caused centennial variability of up to $\mathord{\sim}$0.6 mm/yr around the long-term rate. It is extremely likely (probability $P = 0.95$) that 20th century RSL rise at Sand Point, NC, (2.8 $\pm$ 0.5 mm/yr) was faster than during any other century in at least 2,900 years. Projections based on a fusion of process models, statistical models, expert elicitation, and expert assessment indicate that RSL at Wilmington, NC, is very likely ($P = 0.90$) to rise by 42--132 cm between 2000 and 2100 under the high-emissions RCP 8.5 pathway. Under all emission pathways, 21st century RSL rise is very likely ($P > 0.90$) to be faster than during the 20th century. Due to RSL rise, under RCP 8.5, the current `1-in-100 year' flood is expected at Wilmington in $\mathord{\sim}$30 of the 50 years between 2050-2100.
description: 13 main text pages, 4 figures, 4 supplemental pages. Published in Climatic Change
Impact of the nucleation of charge clusters on the retention of memristors: a self-consistent phase field computational study
Creators: name: Koushan, Foroozan S.
name: Kobayashi, Nobuhiko P.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Applied Physics (physics.app-ph)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences
subject: B.3.1

description: In recent years, resistive RAM often referred to as memristor is actively pursued as a replacement for nonvolatile-flash memory due to its superior characteristics such as high density, scalability, low power operation, high endurance, and fast operating speed. However, one of the challenges that need to be overcome is the loss of retention for both ON- and OFF-states; the retention loss. While various models are proposed to explain the retention loss in memristors consisting of a switching layer, in this paper, we propose that the nucleation of clusters made of electrical charges, charge-clusters, in the switching layer acts as a potential root cause for the retention loss. The nucleation results from localized electric-field produced intermittently during cyclic switching operations. We use the phase-field method to illustrate how the nucleation of charge-clusters gives rise to the retention loss. Our results suggest that the degree at which the retention loss arises is linked to the number of cyclic switching operations since the probability at which nucleation centers form increases with the number of cycle switching operations, which is consistent with a range of experimental findings previously reported.
title: La necessità di una decolonizzazione concettuale nella filosofia africana
Creators: name: Wiredu , Kwasi
Publisher: name: Roma Tre-Press
Year: 2009

description: In questo lavoro l'autore intende riprendere il discorso tenuto nel 1980 in occasione della conferenza dell'UNESCO a Nairobi su "Insegnamento e ricerca in filosofia in Africa". Si parlò in quell'occasione di «decolonizzazione concettuale». Per «decolonizzazione concettuale» si intende un processo che comprende due passaggi: 1) evitare l'assimilazione senza verifiche nel nostro pensiero di schemi concettuali fissati nelle tradizioni filosofiche straniere; 2) sfruttare al massimo, nelle nostre meditazioni filosofiche, le risorse dei nostri schemi concettuali originari, anche in settori specialistici della filosofia contemporanea.

description: B@belonline vol. 6 Incontro con la filosofia africana
title: Ecologia e teologia africane
Creators: name: Ela , Jean-Marc
Publisher: name: Roma Tre-Press
Year: 2009

description: Come amava ripetere il vescovo camerunense Monsignor Albert Ndongo, «la Chiesa non può guidarci al cielo come se la terra non esistesse». Alla luce della Gaudium et Spes, qualunque problema relativo alla terra è al cuore delle preoccupazioni del regno di Dio. Lo sviluppo umano, economico e sociale è un processo globale che deve armonizzarsi con le esigenze della «sostenibilità».

description: B@belonline vol. 6 Incontro con la filosofia africana
Spectral analysis of continuous FEM for hyperbolic PDEs: influence of approximation, stabilization, and time-stepping
Creators: name: Michel, Sixtine
name: Torlo, Davide
name: Ricchiuto, Mario
name: Abgrall, Rémi
Publisher: name: arXiv
Year: 2021
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics
subject: 65M60

description: We study continuous finite element dicretizations for one dimensional hyperbolic partial differential equations. The main contribution of the paper is to provide a fully discrete spectral analysis, which is used to suggest optimal values of the CFL number and of the stabilization parameters involved in different types of stabilization operators. In particular, we analyze the streamline-upwind Petrov-Galerkin (SUPG) stabilization technique, the continuous interior penalty (CIP) stabilization method and the local projection stabilization (LPS). Three different choices for the continuous finite element space are compared: Bernstein polynomials, Lagrangian polynomials on equispaced nodes, and Lagrangian polynomials on Gauss-Lobatto cubature nodes. For the last choice, we only consider inexact quadrature based on the formulas corresponding to the degrees of freedom of the element, which allows to obtain a fully diagonal mass matrix. We also compare different time stepping strategies, namely Runge-Kutta (RK), strong stability preserving RK (SSPRK) and deferred correction time integration methods. The latter allows to alleviate the computational cost as the mass matrix inversion is replaced by the high order correction iterations. To understand the effects of these choices, both time-continuous and fully discrete Fourier analysis are performed. These allow to compare all the different combinations in terms of accuracy and stability, as well as to provide suggestions for optimal values discretization parameters involved. The results are thoroughly verified numerically both on linear and non-linear problems, and error-CPU time curves are provided. Our final conclusions suggest that cubature elements combined with SSPRK and CIP or LPS stabilization are the most promising combinations.
Geometric duality theory of cones in dual pairs of vector spaces
Creators: name: Messerschmidt, Miek
Publisher: name: arXiv
Year: 2014
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: Primary: 46A20, Secondary: 46B10, 46B20, 46A40, 46B40, 46L05

description: This paper will generalize what may be termed the "geometric duality theory" of real pre-ordered Banach spaces which relates geometric properties of a closed cone in a real Banach space, to geometric properties of the dual cone in the dual Banach space. We show that geometric duality theory is not restricted to real pre-ordered Banach spaces, as is done classically, but can be extended to real Banach spaces endowed with arbitrary collections of closed cones. We define geometric notions of normality, conormality, additivity and coadditivity for members of dual pairs of real vector spaces as certain possible interactions between two cones and two convex convex sets containing zero. We show that, thus defined, these notions are dual to each other under certain conditions, i.e., for a dual pair of real vector spaces $(Y,Z)$, the space $Y$ is normal (additive) if and only if its dual $Z$ is conormal (coadditive) and vice versa. These results are set up in a manner so as to provide a framework to prove results in the geometric duality theory of cones in real Banach spaces. As an example of using this framework, we generalize classical duality results for real Banach spaces pre-ordered by a single closed cone, to real Banach spaces endowed with an arbitrary collections of closed cones. As an application, we analyze some of the geometric properties of naturally occurring cones in C*-algebras and their duals.
Deep Learning of Quantum Many-Body Dynamics via Random Driving
Creators: name: Mohseni, Naeimeh
name: Fösel, Thomas
name: Guo, Lingzhen
name: Navarrete-Benlloch, Carlos
name: Marquardt, Florian
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Neural networks have emerged as a powerful way to approach many practical problems in quantum physics. In this work, we illustrate the power of deep learning to predict the dynamics of a quantum many-body system, where the training is \textit{based purely on monitoring expectation values of observables under random driving}. The trained recurrent network is able to produce accurate predictions for driving trajectories entirely different than those observed during training. As a proof of principle, here we train the network on numerical data generated from spin models, showing that it can learn the dynamics of observables of interest without needing information about the full quantum state. This allows our approach to be applied eventually to actual experimental data generated from a quantum many-body system that might be open, noisy, or disordered, without any need for a detailed understanding of the system. This scheme provides considerable speedup for rapid explorations and pulse optimization. Remarkably, we show the network is able to extrapolate the dynamics to times longer than those it has been trained on, as well as to the infinite-system-size limit.
Evolutionary game model of group choice dilemmas on hypergraphs
Creators: name: Civilini, Andrea
name: Anbarci, Nejat
name: Latora, Vito
Publisher: name: arXiv
Year: 2021
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Social and Information Networks (cs.SI)
subject: Populations and Evolution (q-bio.PE)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences
subject: FOS: Biological sciences

description: We introduce an evolutionary game on hypergraphs in which decisions between a risky alternative and a safe one are taken in social groups of different sizes. The model naturally reproduces choice shifts, namely the differences between the preference of individual decision makers and the consensual choice of a group, that have been empirically observed in choice dilemmas. In particular, a deviation from the Nash equilibrium towards the risky strategy occurs when the dynamics takes place on heterogeneous hypergraphs. These results can explain the emergence of irrational herding and radical behaviours in social groups.
description: Main text (4 pages, 2 figures) and Supplemental Material (8 pages, 3 figures, 1 table)
Superpixels and Graph Convolutional Neural Networks for Efficient Detection of Nutrient Deficiency Stress from Aerial Imagery
Creators: name: Dadsetan, Saba
name: Pichler, David
name: Wilson, David
name: Hovakimyan, Naira
name: Hobbs, Jennifer
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Advances in remote sensing technology have led to the capture of massive amounts of data. Increased image resolution, more frequent revisit times, and additional spectral channels have created an explosion in the amount of data that is available to provide analyses and intelligence across domains, including agriculture. However, the processing of this data comes with a cost in terms of computation time and money, both of which must be considered when the goal of an algorithm is to provide real-time intelligence to improve efficiencies. Specifically, we seek to identify nutrient deficient areas from remotely sensed data to alert farmers to regions that require attention; detection of nutrient deficient areas is a key task in precision agriculture as farmers must quickly respond to struggling areas to protect their harvests. Past methods have focused on pixel-level classification (i.e. semantic segmentation) of the field to achieve these tasks, often using deep learning models with tens-of-millions of parameters. In contrast, we propose a much lighter graph-based method to perform node-based classification. We first use Simple Linear Iterative Cluster (SLIC) to produce superpixels across the field. Then, to perform segmentation across the non-Euclidean domain of superpixels, we leverage a Graph Convolutional Neural Network (GCN). This model has 4-orders-of-magnitude fewer parameters than a CNN model and trains in a matter of minutes.
Searching for a counterexample to Kurepa's Conjecture
Creators: name: Andrejić, Vladica
name: Tatarevic, Milos
Publisher: name: arXiv
Year: 2014
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11B83

description: Kurepa's conjecture states that there is no odd prime $p$ that divides $!p=0!+1!+\cdots+(p-1)!$. We search for a counterexample to this conjecture for all $p<2^{34}$. We introduce new optimization techniques and perform the computation using graphics processing units. Additionally, we consider the generalized Kurepa's left factorial given by $!^{k}n=(0!)^k +(1!)^k +\cdots+((n-1)!)^{k}$, and show that for all integers $1
description: Accepted for publication in Mathematics of Computation
Modulating category bias in working memory
Creators: name: Fukuda, Keisuke
name: Printzlau, Frida
name: Mack, Michael L.
Publisher: name: OSF Registries
Year: 2023
Subjects: subject: Cognitive Psychology
subject: Cognition and Perception
subject: Social and Behavioral Sciences
subject: Psychology
subject: FOS: Psychology
subject: category bias
subject: category learning
subject: long-term memory
subject: working memory

description: This project will investigate category biases in working memory and to what extent they are modulated by task demands
Object-Based Augmentation Improves Quality of Remote Sensing Semantic Segmentation
Creators: name: Illarionova, Svetlana
name: Nesteruk, Sergey
name: Shadrin, Dmitrii
name: Ignatiev, Vladimir
name: Pukalchik, Mariia
name: Oseledets, Ivan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Today deep convolutional neural networks (CNNs) push the limits for most computer vision problems, define trends, and set state-of-the-art results. In remote sensing tasks such as object detection and semantic segmentation, CNNs reach the SotA performance. However, for precise performance, CNNs require much high-quality training data. Rare objects and the variability of environmental conditions strongly affect prediction stability and accuracy. To overcome these data restrictions, it is common to consider various approaches including data augmentation techniques. This study focuses on the development and testing of object-based augmentation. The practical usefulness of the developed augmentation technique is shown in the remote sensing domain, being one of the most demanded ineffective augmentation techniques. We propose a novel pipeline for georeferenced image augmentation that enables a significant increase in the number of training samples. The presented pipeline is called object-based augmentation (OBA) and exploits objects' segmentation masks to produce new realistic training scenes using target objects and various label-free backgrounds. We test the approach on the buildings segmentation dataset with six different CNN architectures and show that the proposed method benefits for all the tested models. We also show that further augmentation strategy optimization can improve the results. The proposed method leads to the meaningful improvement of U-Net model predictions from 0.78 to 0.83 F1-score.
Effects of violence in video gaming on aggression
Creators: name: Seetahul, Yashvin
name: Greitemeyer, Tobias
Publisher: name: OSF Registries
Year: 2023
Subjects: subject: Social and Behavioral Sciences
subject: Psychology
subject: FOS: Psychology
subject: Violent video games
subject: aggression
subject: aggressive behavior
subject: violence in video games

description: Laboratory experimental study
Exclusive J/$ψ$ photoproduction off protons in ultra-peripheral p-Pb collisions at $\sqrt{s_{\rm NN}}=5.02$ TeV
Creators: name: ALICE Collaboration
Publisher: name: arXiv
Year: 2014
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We present the first measurement at the LHC of exclusive J/$ψ$ photoproduction off protons, in ultra-peripheral proton-lead collisions at $\sqrt{s_{\rm NN}}=5.02$ TeV. Events are selected with a dimuon pair produced either in the rapidity interval, in the laboratory frame, $2.5
description: 17 pages, 3 captioned figures, 2 tables, authors from page 12, published version, figures at http://aliceinfo.cern.ch/ArtSubmission/node/1743
Analysis of the diffuse-domain method for solving PDEs in complex geometries
Creators: name: Lervåg, Karl Yngve
name: Lowengrub, John
Publisher: name: arXiv
Year: 2014
Subjects: subject: Numerical Analysis (math.NA)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 35B40, 35K50, 35K57, 65Mxx

description: In recent work, Li et al.\ (Comm.\ Math.\ Sci., 7:81-107, 2009) developed a diffuse-domain method (DDM) for solving partial differential equations in complex, dynamic geometries with Dirichlet, Neumann, and Robin boundary conditions. The diffuse-domain method uses an implicit representation of the geometry where the sharp boundary is replaced by a diffuse layer with thickness $ε$ that is typically proportional to the minimum grid size. The original equations are reformulated on a larger regular domain and the boundary conditions are incorporated via singular source terms. The resulting equations can be solved with standard finite difference and finite element software packages. Here, we present a matched asymptotic analysis of general diffuse-domain methods for Neumann and Robin boundary conditions. Our analysis shows that for certain choices of the boundary condition approximations, the DDM is second-order accurate in $ε$. However, for other choices the DDM is only first-order accurate. This helps to explain why the choice of boundary-condition approximation is important for rapid global convergence and high accuracy. Our analysis also suggests correction terms that may be added to yield more accurate diffuse-domain methods. Simple modifications of first-order boundary condition approximations are proposed to achieve asymptotically second-order accurate schemes. Our analytic results are confirmed numerically in the $L^2$ and $L^\infty$ norms for selected test problems.
description: 32 pages, 12 figures
Nodular anal melanoma. A case report
Creators: name: Ana Sofía González Izaguirre M.D.
name: Ángel Padrón Rivera M.D.
name: Fernando Carballar Mejía M.D.
name: Evelia Ana Florencia Ponce Horta M.D.
name: María Fernanda González Castillo M.D.
name: Alondra Gabriela Mercado Mendiola M.D.
Publisher: name: Zenodo
Year: 2023

description: Background
Anorectal melanoma (AM) is a rare malignancy, characterized by aggressive behavior and a poor prognosis. AM is more frequent in patients aged over 50 years. There are many theories regarding AM pathogenesis. Some consider that AM may be related to oxidative stress in the region and to immunosuppression. Most frequently, the signs and symptoms are obstruction, rectal bleeding, pain, or rectal tenesmus. There is currently no consensus about the most appropriate systemic treatment.
 
Keywords: Anorectal melanoma, Immunotherapeutic strategies.
title: Nature, culture, ecologie. Invito a un dialogo interculturale
Creators: name: Ngoenha , Severino Elias
Publisher: name: Roma Tre-Press
Year: 2009

description: Il dibattito sulla "prima" e sulla "seconda natura", la cultura, ha fatto riemergere una serie di interrogativi tuttora irrisolti. Due meritano una particolare attenzione. Il primo concerne i "primitivi" e deve la sua celebrità nel Novecento a Claude Lévi-Strauss. Questa concezione ha tuttora un peso rilevante e richiede ulteriori approfondimenti: molte società primitive opporrebbero resistenza allo sviluppo, per il persistere di un'idea della relazione tra natura e cultura. La seconda questione riguarda il mondo industrializzato e si riferisce alla tecnica. In quanto mediazione indispensabile negli scambi tra uomo e natura, la tecnica sembra imporre un processo incontrollabile di trasformazioni, che stravolge le relazioni tra i viventi.

description: B@belonline vol. 6 Incontro con la filosofia africana
Gauge invariants of linearized gravity with a general background metric
Creators: name: Garg, Deepen
name: Dodin, I. Y.
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In linearized gravity with distributed matter, the background metric has no generic symmetries, and decomposition of the metric perturbation into global normal modes is generally impractical. This complicates the identification of the gauge-invariant part of the perturbation, which is a concern, for example, in the theory of dispersive gravitational waves whose energy--momentum must be gauge-invariant. Here, we propose how to identify the gauge-invariant part of the metric perturbation and the six independent gauge invariants \textit{per~se} for an arbitrary background metric. For the Minkowski background, the operator that projects the metric perturbation on the invariant subspace is proportional to the well-known dispersion operator of linear gravitational waves in~vacuum. For a general background, this operator is expressed in terms of the Green's operator of the vacuum wave equation. If the background is smooth, it can be found asymptotically using the inverse scale of the background metric as a small parameter.
Brox, Norbert, Regensburger Neues Testament, Die Pastoralbriefe. Ed. Friedrich Pustet. Vol. de 343 ps. 145x225. Regensburg 1969
Creators: name: Carreira, José Nunes
Publisher: name: Theologica
Year: 1969

description: Theologica, v. 4 n. 4 (1969)