cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Pre-impact dynamics of a droplet impinging on a deformable surface
Creators: name: Henman, Nathaniel I. J.
name: Smith, Frank T.
name: Tiwari, Manish K.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: The non-linear interaction between air and a water droplet just prior to high-speed impingement on a surface is a phenomenon that has been researched extensively and occurs in a number of industrial settings. The role that surface deformation plays in an air cushioned impact of a liquid droplet is considered here. In a two-dimensional framework, assuming small density and viscosity ratios between the air and the liquid, a reduced system of integro-differential equations is derived governing the liquid droplet free-surface shape, the pressure in the thin air film and the deformation of the surface, assuming the effects of surface tension, compressibility and gravity to be negligible. The deformation of the surface is first described in a rather general form, based on previous membrane-type models. The coupled system is then investigated in two cases: a soft viscoelastic case where the substrate stiffness and (viscous) damping are considered and a more general flexible surface where all relevant parameters are retained. Numerical solutions are presented, highlighting a number of key consequences of substrate deformability on the pre-impact phase of droplet impact, such as reduction in pressure buildup, increased air entrapment and considerable delay to touchdown. Connections (including subtle dependence of the size of entrapped air on the droplet velocity, reduced pressure peaks and droplet gliding) with recent experiments and a large deformation analysis are also presented.
Detection of Two Interstellar Polycyclic Aromatic Hydrocarbons via Spectral Matched Filtering
Creators: name: McGuire, Brett A.
name: Loomis, Ryan A.
name: Burkhardt, Andrew M.
name: Lee, Kin Long Kelvin
name: Shingledecker, Christopher N.
name: Charnely, Steven B.
name: Cooke, Ilsa R.
name: Cordiner, Martin A.
name: Herbst, Eric
name: Kalenskii, Sergei
name: Siebert, Mark A.
name: Willis, Eric R.
name: Xue, Ci
name: Remijan, Anthony J.
name: McCarthy, Michael C.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Ubiquitous unidentified infrared emission bands are seen in many astronomical sources. Although these bands are widely, if not unanimously, attributed to the collective emission from polycyclic aromatic hydrocarbons, no single species from this class has been detected in space. We present the discovery of two -CN functionalized polycyclic aromatic hydrocarbons, 1- and 2-cyanonaphthalene, in the interstellar medium aided by spectral matched filtering. Using radio observations with the Green Bank Telescope, we observe both bi-cyclic ring molecules in the molecular cloud TMC-1. We discuss potential in situ gas-phase formation pathways from smaller organic precursor molecules.
Additional file 1 of Minimal important difference of the 12-item World Health Organization Disability Assessment Schedule (WHODAS) 2.0 in persons with chronic low back pain
Creators: name: Wong, Jessica J.
name: Hogg-Johnson, Sheilah
name: De Groote, Wouter
name: Ćwirlej-Sozańska, Agnieszka
name: Garin, Olatz
name: Ferrer, Montse
name: Acuña, Àngels Pont
name: Côté, Pierre
Publisher: name: figshare
Year: 2023
Subjects: subject: Medicine
subject: Biotechnology
subject: Sociology
subject: FOS: Sociology
subject: Cancer
subject: Mental Health

description: Supplementary Material 1
On a characterization of convergence in Banach spaces with a Schauder basis
Creators: name: Markin, Marat V.
name: Soghomonian, Olivia B.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: Primary 46B15, 46B45, Secondary 46A35, 46A45, 46B50

description: We extend the well-known characterizations of convergence in the spaces $l_p$ ($1\le p
description: Minor readability improvements
Very High Energy Gamma Rays from Supernova Remnants and Constraints on the Galactic Interstellar Radiation Field
Creators: name: Porter, T. A.
name: Moskalenko, I. V.
name: Strong, A. W.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The large-scale Galactic interstellar radiation field (ISRF) is the result of stellar emission and dust re-processing of starlight. Where the energy density of the ISRF is high (e.g., the Galactic Centre), the dominant gamma-ray emission in individual supernova remnants (SNRs), such as G0.9+0.1, may come from inverse Compton (IC) scattering of the ISRF. Several models of the ISRF exist. The most recent one, which has been calculated by us, predicts a significantly higher ISRF than the well-used model of Mathis, Mezger, and Panagia. However,comparison with data is limited to local observations. Based on our current estimate of the ISRF we predict the gamma-ray emission in the SNRs G0.9+0.1 and RXJ1713, and pair-production absorption features above 20 TeV in the spectra of G0.9+0.1, J1713-381, and J1634-472. We discuss how GLAST, along with current and future very high energy instruments, may be able to provide upper bounds on the large-scale ISRF.
description: To appear in the proceedings of the 1st GLAST Symposium
Charged black hole in $4D$ Einstein-Gauss-Bonnet gravity: Particle motion, plasma effect on weak gravitational lensing and centre-of-mass energy
Creators: name: Atamurotov, Farruh
name: Shaymatov, Sanjar
name: Sheoran, Pankaj
name: Siwach, Sanjay
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We study the motion of charged and spinning particles and photons in the $4D$ charged Einstein-Gauss-Bonnet (EGB) black hole vicinity. We determine the radius of the innermost stable circular orbit (ISCO) for test particles. We show that the combined effect of the Gauss-Bonnet (GB) coupling parameter and black hole charge decreases the ISCO and the radius of the photon sphere. Further, we study the gravitational deflection angle and show that the impact of GB term and black hole charge on it is quite noticeable. We also consider the effect of plasma and find the analytical form of the deflection angle in the case of a uniform and non-uniform plasma. Interestingly we find that the deflection angle becomes larger when uniform plasma is considered in comparison to the case of non-uniform plasma. We also study the center of mass energy ($E_{C.M.}$) obtained by collision process for non-spinning particles and show that the impact of GB parameter and black hole charge leads to high energy collision. In addition, we also study the $E_{C.M.}$ for the case of spinning particles and show that if the two spinning particles collide near the horizon of $4D$ charged EGB BH, the $E_{C.M.}$ becomes infinitely high which is in disparity with the non-spinning particles counterpart where $E_{C.M.}$ never grows infinitely. To achieve this, an important role is played by the spinning particle known as the \textit{near-critical} particle (i.e. a particle with fine-tuned parameters). In order to achieve the unbounded $E_{C.M}$ from the collision of two spinning particles, the energy per unit mass must be less than unity for a \textit{near-critical} particle, which means such a particle starts from some intermediate position $r>r_{h}$ and not from infinity.
description: 39 pages, 10 captioned figures. Accepted for publication in JCAP. Updated to match the accepted version
Dynamical decoupling methods in nanoscale NMR
Creators: name: Munuera-Javaloy, C.
name: Puebla, R.
name: Casanova, J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Nuclear magnetic resonance (NMR) schemes can be applied to micron-, and nanometer-sized samples by the aid of quantum sensors such as nitrogen-vacancy (NV) color centers in diamond. These minute devices allow for magnetometry of nuclear spin ensembles with high spatial and frequency resolution at ambient conditions, thus having a clear impact in different areas such as chemistry, biology, medicine, and material sciences. In practice, NV quantum sensors are driven by microwave (MW) control fields with a twofold objective: On the one hand, MW fields bridge the energy gap between NV and nearby nuclei which enables a coherent and selective coupling among them while, on the other hand, MW fields remove environmental noise on the NV leading to enhanced interrogation time. In this work we review distinct MW radiation patterns, or dynamical decoupling techniques, for nanoscale NMR applications.
description: 9 pages, 2 figures
Magneto-oscillations due to electron-electron interactions in the ac conductivity of a 2D electron gas
Creators: name: Sedrakyan, T. A.
name: Raikh, M. E.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Electron-electron interactions give rise to the correction, δσ^{int}(ω), to the ac magnetoconductivity, σ(ω), of a clean 2D electron gas that is periodic in ω_c^{-1}, where ω_c is the cyclotron frequency. Unlike conventional harmonics of the cyclotron resonance, which are periodic with ω, this correction is periodic with ω^{3/2}. Oscillations in δσ^{int}(ω) develop at low magnetic fields, ω_c\llω, when the conventional harmonics are suppressed by the disorder. Their origin is a {\em double} backscattering of an electron from the impurity-induced Friedel oscillations. During the time \simω^{-1} between the two backscattering events the electron travels only a {\em small portion} of the Larmour circle.
description: 4+ pages, 3 figures
Interacting Brownian particles exhibiting enhanced rectification in an asymmetric channel
Creators: name: Khatri, Narender
name: Burada, P. S.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Biological Physics (physics.bio-ph)
subject: Chemical Physics (physics.chem-ph)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: Rectification of interacting Brownian particles is investigated in a two-dimensional asymmetric channel in the presence of an external periodic driving force. The periodic driving force can break the thermodynamic equilibrium and induces rectification of particles (or finite average velocity). The spatial variation in the shape of the channel leads to entropic barriers, which indeed control the rectification of particles. We find that by simply tunning the driving frequency, driving amplitude, and shape of the asymmetric channel, the average velocity can be reversed. Moreover, a short range interaction force between the particles further enhances the rectification of particles greatly. This interaction force is modeled as the lubrication interaction. Interestingly, it is observed that there exists a characteristic critical frequency $Ω_c$ below which the rectification of particles greatly enhances in the positive direction with increasing the interaction strength; whereas, for the frequency above this critical value, it greatly enhances in the negative direction with increasing the interaction strength. Further, there exists an optimal value of the asymmetric parameter of the channel for which the rectification of interacting particles is maximum. These findings are useful in sorting out the particles and understanding the diffusive behavior of small particles or molecules in microfluidic channels, membrane pores, etc.
description: 12 pages, 6 figures
An infectious diseases hazard map for India based on mobility and transportation networks
Creators: name: Sadekar, Onkar
name: Budamagunta, Mansi
name: Sreejith, G. J.
name: Jain, Sachin
name: Santhanam, M. S.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Populations and Evolution (q-bio.PE)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: We propose a risk measure and construct an infectious diseases hazard map for India. Given an outbreak location, a hazard index is assigned to each city using an effective distance that depends on inter-city mobilities instead of geographical distance. We demonstrate its utility using an SIR model augmented with air, rail, and road data between top 446 cities. Simulations show that the effective distance from outbreak location reliably predicts the time of arrival of infection in other cities. The hazard index predictions compare well with the observed spread of SARS-CoV-2. The hazard map can be useful in other outbreaks also.
description: 25 pages, 8 figures, including supplementary material
Optimal fluctuation approach to a directed polymer in a random medium
Creators: name: Kolokolov, I. V.
name: Korshunov, S. E.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: A modification of the optimal fluctuation approach is applied to study the tails of the free energy distribution function P(F) for an elastic string in quenched disorder both in the regions of the universal behavior of P(F) and in the regions of large fluctuations, where the behavior of P(F) is non-universal. The difference between the two regimes is shown to consist in whether it is necessary or not to take into account the renormalization of parameters by the fluctuations of disorder in the vicinity of the optimal fluctuation.
description: 4 pages, no figures
Glaude Luython et Nathanael Duez: deux maîtres de langues “passeurs” de savoirs dans les Pays Bas des XVIe et XVIIe siècles
Creators: name: Amatuzzi, Antonella
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2019
Subjects: L-LIN/04 Lingua e traduzione - Lingua francese

description: Glaude Luython (1510-1568) et Nathanel Duez (1609-1660) sont deux maîtres de langues français qui exercèrent leur profession aux Pays Bas. L’objectif de cette étude est d’analyser leur production pédagogique pour observer comment les orientations qui sous-tendent l’enseignement du français ont pu varier dans l’espace d’un siècle. Luython vise à l’éducation et à la formation morale des jeunes ‘hollandais’ : la langue française est le moyen d’accéder aux valeurs et aux savoirs du monde classique. Duez, au contraire, affiche des objectifs plus franchement pragmatiques et utilitaires. Il offre aux étudiants des matériaux pédagogiques utiles pour affronter des situations de communication quotidienne et il propose un apprentissage plus autonome.
The search for the universality class of metric quantum gravity
Creators: name: Martini, Riccardo
name: Ugolotti, Alessandro
name: Zanusso, Omar
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: On the basis of a limited number of reasonable axioms, we discuss the classification of all the possible universality classes of diffeomorphisms invariant metric theories of quantum gravity. We use the language of the renormalization group and adopt several ideas which originate in the context of statistical mechanics and quantum field theory. Our discussion leads to several ideas that could affect the status of the asymptotic safety conjecture of quantum gravity and give universal arguments towards its proof.
description: Part of the Special Issue of Universe "Asymptotic Safety in Quantum Gravity"; 14 pages, 2 figures; Version 2
Faictes tous bonne chierre! Mise en page, contenuti e obiettivi didattici nei Colloques franco-neerlandesi del secondo Cinquecento
Creators: name: Barale, Elisabetta
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2019
Subjects: L-LIN/04 Lingua e traduzione - Lingua francese

description: Il contributo si propone di analizzare comparativamente un dialogo che descrive lo svolgimento di un convivio con diversi commensali e che ricorre in numerose raccolte franco-neerlandesi del secondo Cinquecento. Lo studio delle modalità d’impaginazione, delle citazioni intertestuali e degli obiettivi didattici che hanno animato l’operato di Noël de Berlaimont, Gabriel Meurier, Jacques Grévin e Gérard De Vivre consente di trarre alcune conclusioni sulla natura dei rapporti che si sono instaurati tra i testi e sul tipo di pubblico al quale erano destinati.
Overall dynamic properties of locally resonant viscoelastic layered media based on consistent field integration for oblique anti-plane shear waves
Creators: name: Alizadeh, Vahidreza
name: Amirkhizi, Alireza V.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: In this work, the analysis of oblique anti-plane shear waves propagation and scattering in low frequency resonant micro-structured layered media with viscoelastic constituent layers is presented. The band structure of the infinitely periodic systems and scattering off a finite thickness slab of such media are determined using the transfer matrix method. A consistent dynamic field homogenization approach is applied, in which the micro-scale field equations are integrated and the overall macro-scale quantities are defined to be compatible with these integral forms. A reduced set of constitutive tensors is presented for general asymmetric repeating unit cells (RUC), utilizing the proposed homogenized macro-scale quantities combined with Onsager's principle and presumed material form of elastodynamic reciprocity. This set can be further restricted by studying the form of the dispersion equation leading to a unique constitutive tensor. It is shown that for an asymmetric RUC, the full constitutive tensor are required to match the scattering and band structure of the micro-structured media, but all the off-diagonal parameters vanish for a symmetric RUC. Therefore, it is possible to create an equivalent homogenized representation with a uniquely determined diagonal constitutive tensor for a symmetric RUC, though, as is the case also with asymmetric RUCs, all non-zero components will be wave-vector dependent. Numerical examples are presented to demonstrate the application and consistency of the proposed method. All the diagonal terms are converging to their appropriate Voigt or Reuss averages at the long-wavelength limit for all wave directions. The wave-vector dependent nature of the off-diagonal coupling constants can still be observed even in this limit. The conditions for lossy or lossless systems are presented and are shown to impose weak requirements on overall constitutive tensors.
La comparazione fra spagnolo e italiano nel capitolo “Retta scrittura et pronuntia” de Il paragone della lingua toscana et castigliana (1560)
Creators: name: Polo, Anna
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2019
Subjects: L-LIN/07 Lingua e traduzione - Lingua spagnola

description: Questo lavoro si propone di analizzare in che modo si realizza il confronto tra il sistema linguistico dello spagnolo e quello dell’italiano nel primo capitolo de Il paragone della lingua toscana et castigliana, la prima grammatica di spagnolo per apprendenti italiani, pubblicata a Napoli nel 1560. L’obiettivo del presente studio è quello di offrire un quadro completo di come vengono trattate le analogie e le differenze tra le due lingue in materia di ortografia e pronuncia.
A new analysis of the pQCD contributions to the electroweak parameter $ρ$ using the single-scale approach of principle of maximum conformality
Creators: name: Yu, Qing
name: Zhou, Hua
name: Yan, Jiang
name: Huang, Xu-Dong
name: Wu, Xing-Gang
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: It has been observed that conventional renormalization scheme and scale ambiguities for the pQCD predictions can be eliminated by using the principle of maximum conformality (PMC). However, being the intrinsic nature of any perturbative theory, there are still two types of residual scale dependences due to uncalculated higher-order terms. In the paper, as a step forward of our previous work [Phys.Rev.D {\bf 89},116001(2014)], we reanalyze the electroweak $ρ$ parameter by using the PMC single-scale approach. Using the PMC conformal series and the Pad$\acute{e}$ approximation approach, we observe that the residual scale dependence can be greatly suppressed and then a more precise pQCD prediction up to ${\rm N^4LO}$-level can be achieved, e.g. $Δρ|_{\rm PMC}\simeq(8.204\pm0.012)\times10^{-3}$, where the errors are squared averages of those from unknown higher-order terms and $Δα_s(M_Z)=\pm 0.0010$. We then predict the magnitudes of the shifts of the $W$-boson mass and the effective leptonic weak-mixing angle: $δM_{W}|_{\rm N^4LO} =-0.26$ MeV and $δ\sin^2θ_{\rm eff}|_{\rm N^4LO}=0.14\times10^{-5}$, which are well below the precision anticipated for the future electron-position colliders such as FCC, CEPC and ILC. Thus by measuring those parameters, it is possible to test SM with high precision.
description: 6 pages, 2 figures
Un maestro di tedesco del XVI secolo: Sebastian Helber e il Teutsches Syllabierbuchlein
Creators: name: Caparrini, Marialuisa
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2019
Subjects: L-LIN/14 Lingua e traduzione - Lingua tedesca

description: Il Teutsches Syllabierbuchlein è un breve trattato, redatto dal maestro di tedesco Sebastian Helber e stampato nel 1593, che offre indicazioni pratiche sulla corretta lettura dei testi a stampa altotedeschi del XVI secolo. Il contributo intende offrire una breve presentazione del testo incentrata sull’analisi degli elementi costanti dell’opera di Helber nella descrizione delle lettere (e dei suoni) al fine di metterne in evidenza approccio e metodologia didattica e di valutarne l’effettivo impiego nella prassi didattica dell’epoca.
Metis aboriginal title
Creators: name: Bell, Catherine Edith
Publisher: name: University of British Columbia
Year: 2010

description: This thesis is a legal analysis of the origin and persistence of Metis aboriginal title as an independent legal right. The popular doctrine of aboriginal title is rejected in favour of the natural rights of the Metis and first principles of aboriginal title. A theory of Metis title is developed through the examination of: 1. the inclusion of Metis peoples in s.35(2) of the Constitutional Act. 1982; 2. jurisdiction over Metis claims; 3. natural rights of indigenous peoples and the recognition of natural rights in domestic and international positive law; 4. natural rights of the Metis Nation of Manitoba; and 5. the persistence of Metis title in the face of unilateral and consensual acts of extinguishment. The examination of natural rights reveals an increased importance of natural theories in aboriginal title cases. These theories provide the basis upon which Metis claims to title can be linked to aboriginal title claims and doctrines of extinguishment can be re-examined.
Mott transition in a cavity-boson system: A quantitative comparison between theory and experiment
Creators: name: Lin, Rui
name: Georges, Christoph
name: Klinder, Jens
name: Molignini, Paolo
name: Büttner, Miriam
name: Lode, Axel U. J.
name: Chitra, R.
name: Hemmerich, Andreas
name: Keßler, Hans
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: The competition between short-range and cavity-mediated infinite-range interactions in a cavity-boson system leads to the existence of a superfluid phase and a Mott-insulator phase within the self-organized regime. In this work, we quantitatively compare the steady-state phase boundaries of this transition measured in experiments and simulated using the Multiconfigurational Time-Dependent Hartree Method for Indistinguishable Particles. To make the problem computationally feasible, we represent the full system by the exact many-body wave function of a two-dimensional four-well potential. We argue that the validity of this representation comes from the nature of both the cavity-atomic system and the Bose-Hubbard physics. Additionally we show that the chosen representation only induces small systematic errors, and that the experimentally measured and theoretically predicted phase boundaries agree reasonably. We thus demonstrate a new approach for the quantitative numerical determination of the superfluid--Mott-insulator phase boundary.
description: 30 pages, 9 figures, 1 table. Submission to SciPost
CHANCES. Practices, Spaces and Buildings in Cities' Tranformation
Creators: name: Trentin, Annalisa
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2020
Subjects: ICAR/12 Tecnologia dell'architettura
ICAR/17 Disegno
ICAR/18 Storia dell'architettura
ICAR/19 Restauro
ICAR/21 Urbanistica

description: CHANCES has been an international conference that was aimed to explore, from a multidisciplinary perspective, the fragile but continuous urban transformation through the effective contribution of culture, nature and technology. The aim of this conference was to provide a deeper understanding of urban transformations’ research and practices, focusing on the use, re-use, design, renovation and innovative governance and management of public spaces, urban commons and buildings. We believe that these thoughts will largely contribute to shape and increase sustainable design, construction and planning in constant cities’ transformation. Contributions could build on reflections and studies concerning current or historical approaches that are changing or drastically changed the cities we lived in.
title: L’influence du rapport à l’erreur sur l’exercice de l’autorité en classe
title: L’influence du rapport à l’erreur sur l’exercice de l’autorité en classe
titleType: AlternativeTitle
Creators: name: Paillat, Mathilde
Publisher: name: Unknown
Year: 0

description: Ce travail explore comment le rapport à l’erreur des enseignant·e·s impacte leur autorité en classe. La méthodologie retenue est une analyse thématique qui s’appuie sur des entretiens semi-directifs pour faire émerger les représentations des enquêté·e·s sur leurs erreurs et sur leur autorité en classe. Cette analyse permet de relever quatre grands types d’erreurs : les erreurs d’inattention (type A), les erreurs factuelles (type B), les erreurs pédagogiques (type C) et les erreurs interpersonnelles (types D). Face à ces erreurs, le ressenti peut être plutôt négatif, neutre ou positif. De manière générale, lorsque des émotions négatives apparaissent, les enseignant·e·s ont tendance à adopter des stratégies d’évitement de la sensation désagréable ou de futures erreurs. Lorsque le ressenti est plus neutre, les enseignant·e·s choisissent souvent des stratégies de remédiation, en clarifiant le contenu et en restaurant la relation de confiance avec les élèves. Finalement, lorsque les émotions sont positives, les enseignant·e·s évoquent des stratégies de valorisation, grâce auxquelles ils parviennent non seulement à rebondir sur leurs erreurs, mais à apprendre de celles-ci et à modeler un rapport positif aux erreurs. Ainsi, il existe trois sortes de rapport à l’erreur. Parfois, les enseignant·e·s considèrent que l’erreur est un danger, qu’il faut à tout prix éviter au risque de se décrédibiliser face aux élèves. Dans d’autres instances, les enseignant·e·s voient l’erreur comme un accident, à éviter, mais qui fait partie de l’enseignement. Finalement, il est aussi possible de considérer que l’erreur est une opportunité d’apprendre, autant pour les enseignant·e·s que pour leurs élèves. Ces différents types de rapports à l’erreur ont un impact sur l’autorité de l’enseignant·e. En effet, lorsque l’erreur est considérée comme un danger, “être l’autorité” et “faire autorité” devient difficile, ces deux pôles reposant sur le statut et l’expertise disciplinaire et pédagogique. Au contraire, un rapport à l’erreur positif permet à un·e enseignant·e d’entrer dans le processus d’autorisation qui lui permettra d’“avoir de l’autorité”. Dans ce cas, les erreurs ne sont plus un danger mais une opportunité d’apprendre et de consolider son autorité.
What Do Cooperative Firms Maximize, if at All? Evidence from Emilia-Romagna in the pre-Covid Decade
Creators: name: Caselli, Guido
name: Costa, Michele
name: Delbono, Flavio
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2021
Subjects: SECS-S/01 Statistica

description: The Italian region Emilia-Romagna ranks first among the world’s most important cooperative districts. Using a unique dataset covering all firms registered in the region, we investigate the performance of active firms in the period 2010-18. By focusing on employment, revenue and profits of cooperative firms as compared to conventional firms, we disentangle the differences between the average performance of the two types of companies and detect the presence of a “size effect” driving much of the difference between them. Moreover, our results strengthen previous empirical evidence about the countercyclical role of cooperative firms: they seem to optimize a mixture of employment and profits, assigning a greater weight to the former during downturns and stagnation. Finally, we examine the regional logistics industry and compare also the profitability of employees in the two segments of the sector.
A Soft-Aided Staircase Decoder Using Three-Level Channel Reliabilities
Creators: name: Lei, Yi
name: Chen, Bin
name: Liga, Gabriele
name: Balatsoukas-Stimming, Alexios
name: Sun, Kaixuan
name: Alvarado, Alex
Publisher: name: arXiv
Year: 2021
Subjects: subject: Information Theory (cs.IT)
subject: Signal Processing (eess.SP)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: The soft-aided bit-marking (SABM) algorithm is based on the idea of marking bits as highly reliable bits (HRBs), highly unreliable bits (HUBs), and uncertain bits to improve the performance of hard-decision (HD) decoders. The HRBs and HUBs are used to assist the HD decoders to prevent miscorrections and to decode those originally uncorrectable cases via bit flipping (BF), respectively. In this paper, an improved SABM algorithm (called iSABM) is proposed for staircase codes (SCCs). Similar to the SABM, iSABM marks bits with the help of channel reliabilities, i.e., using the absolute values of the log-likelihood ratios. The improvements offered by iSABM include: (i) HUBs being classified using a reliability threshold, (ii) BF randomly selecting HUBs, and (iii) soft-aided decoding over multiple SCC blocks. The decoding complexity of iSABM is comparable of that of SABM. This is due to the fact that on the one hand no sorting is required (lower complexity) because of the use of a threshold for HUBs, while on the other hand multiple SCC blocks use soft information (higher complexity). Additional gains of up to 0.53 dB with respect to SABM and 0.91 dB with respect to standard SCC decoding at a bit error rate of $10^{-6}$ are reported. Furthermore, it is shown that using 1-bit reliability marking, i.e., only having HRBs and HUBs, only causes a gain penalty of up to 0.25 dB with a significantly reduced memory requirement.
State responsibility and international financial obligations : a case study of the International Monetary Fund stand-by arrangements with developing country members
Creators: name: Candelaria, Sedfrey Martinez
Publisher: name: University of British Columbia
Year: 2010

description: Since the international debt crisis arose in 1982, various forms of debt relief measures have been applied by international creditors to alleviate the difficulties encountered by most developing countries in meeting their financial obligations. Renegotiation of external debts within the framework of official and private creditor clubs, however, has become the widely acceptable procedure in recent years. A sine qua non to this process is the entry by a debtor state into a stand-by arrangement with the International Monetary Fund. Compliance with the terms of the stand-by arrangement is closely linked, either in a formal or informal manner, to the enforcement of bilateral loan rescheduling agreements with creditor governments and syndicated loan agreements with private commercial banks. The crux of IMF financing is a commitment by a debtor state to implement economic policies aimed at improving the latter1s balance of payments position. However, the impact of these economic austerity measures upon the political stability of the debtor's government and the living standards of its citizens has generated an attitude of reluctance among the leaders of several developing countries to consult the IMF in accordance with current renegotiation procedures. In this thesis, the writer will examine the salient legal and political issues arising from the practice of international creditors in using compliance with the terms of the IMF stand-by arrangement as a parallel condition under their loan agreements with a debtor state. Three main arguments have been considered by this writer in shedding light upon this study. Firstly, the assumption that compliance with the terms of the IMF stand-by arrangement constitutes an international obligation is not in accord with the law and practice of the IMF. Any inference of breach entailing state responsibility, therefore, is unwarranted on account of the characterization of the IMF stand-by arrangement as a non-binding instrument. Secondly, a debtor state experiencing extreme economic hardship may be justified under international law to take unilateral action having the effect of deviating from the stand-by arrangement provisions. It will be argued in particular that the principle of "freedom for payments" embodied in stand-by arrangements is subject to an exception applying the rule of a state of necessity under international law. Finally, it will be argued that the political sustainability of economic adjustment for debtor states through the stand-by arrangements could be enhanced by incorporating human rights principles as a juridical standard for adjustment policies formulated in consultation with the IMF.
Thermal axions with multi-eV masses are possible in low-reheating scenarios
Creators: name: Carenza, Pierluca
name: Lattanzi, Massimiliano
name: Mirizzi, Alessandro
name: Forastieri, Francesco
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We revise cosmological mass bounds on hadronic axions in low-reheating cosmological scenarios, with a reheating temperature $T_{\rm RH}~\le 100$ MeV, in light of the latest cosmological observations. In this situation, the neutrino decoupling would be unaffected, while the thermal axion relic abundance is suppressed. Moreover, axions are colder in low-reheating temperature scenarios, so that bounds on their abundance are possibly loosened. As a consequence of these two facts, cosmological mass limits on axions are relaxed. Using state-of-the-art cosmological data and characterizing axion-pion interactions at the leading order in chiral perturbation theory, we find in the standard case an axion mass bound $m_a < 0.26$ eV. However, axions with masses $m_a \simeq 1$ eV, or heavier, would be allowed for reheating temperatures $T_{\rm RH} \lesssim 80$ MeV. Multi-eV axions would be outside the mass sensitivity of current and planned solar axion helioscopes and would demand new experimental approaches to be detected.
description: v2: minor changes to match the version published on JCAP. 27 pages, 10 figures
Group Testing per COVID-19: Proposta di Esperimenti
Creators: name: Chiani, Marco
name: Liva, Gianluigi
name: Paolini, Enrico
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2021
Subjects: BIO/12 Biochimica clinica e biologia molecolare e clinica
BIO/19 Microbiologia
ING-INF/03 Telecomunicazioni
ING-INF/06 Bioingegneria elettronica e informatica
LS2 - Genetics, Genomics, Bioinformatics and Systems Biology: Molecular and population genetics, genomics, transcriptomics, proteomics, metabolomics, bioinformatics, computational biology, biostatistics, biological modelling and simulation, systems biolog
LS7 - Diagnostic Tools, Therapies and Public Health: Aetiology, diagnosis and treatment of disease, public health, epidemiology, pharmacology, clinical medicine, regenerative medicine, medical ethics
MED/01 Statistica medica
MED/07 Microbiologia e microbiologia clinica
MED/17 Malattie infettive

description: Breve descrizione di un nuovo protocollo per esperimenti di group testing. Obiettivo: verificare la possibilita' di risparmiare test (ad esempio PCR).
Uniqueness of supersymmetric AdS$_5$ black holes with $SU(2)$ symmetry
Creators: name: Lucietti, James
name: Ovchinnikov, Sergei G.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We prove that any supersymmetric solution to five-dimensional minimal gauged supergravity with $SU(2)$ symmetry, that is timelike outside an analytic horizon, is a Gutowski-Reall black hole or its near-horizon geometry. The proof combines a delicate near-horizon analysis with the general form for a Kähler metric with cohomogeneity-1 $SU(2)$ symmetry. We also prove that any timelike supersymmetric soliton solution to this theory, with $SU(2)$ symmetry and a nut or a complex bolt, has a Kähler base with enhanced $U(1)\times SU(2)$ symmetry, and we exhibit a family of asymptotically AdS$_5/\mathbb{Z}_p$ solitons for $p \geq 3$ with a bolt in this class.
description: 33 pages. v2: minor edits, published version
Educação ao Longo da Vida
Creators: name: Guimarães, Paula
Publisher: name: Sisyphus - Journal of Education
Year: 2019

description: Depois da II Guerra Mundial e até à década de 1970, registou-se um forte incremento do progresso científico e tecnológico. Assistiu-se igualmente à massificação dos sistemas educativos, tendência esta acompanhada pelo descontentamento face aos modelos pedagógicos vigentes. A ideia de que os sujeitos se educavam ao longo da vida, através do conceito de educação permanente, surgiu neste âmbito nos finais da década de 1950, preconizada num primeiro momento pelo Conselho da Europa e mais tarde, em finais da década de 1960, pela UNESCO. Esta ideia surgia como uma nova proposta educativa que concedia maior protagonismo aos contextos não formais e informais de educação, formação e aprendizagem. Assente numa perspetiva democrática e humanista, a ideia incluía uma forte crítica ao modelo escolar tradicional, acusado de pouco flexível e desmobilizador da participação daqueles que se educavam, assim como pouco eficaz na promoção da igualdade de oportunidades e da mobilidade social ascendente (...)
description: Sisyphus - Journal of Education, Vol 7 No 2 (2019): Educação ao Longo da Vida
Un cabestano sulla prima nave romana del lago di Nemi
Creators: name: Giunchi, Nino
name: Molari, Pier Gabriele
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2021
Subjects: ING-IND/01 Architettura navale
ING-IND/02 Costruzioni e impianti navali e marini
ING-IND/14 Progettazione meccanica e costruzione di macchine
L-ANT/07 Archeologia classica

description: Il ritrovamento sulla prima delle Navi di Nemi di parti di due cosiddette piattaforme rotanti ha suscitato numerose ipotesi sul loro uso. L’argomento è particolarmente interessante dato che si tratta del primo impiego noto di elementi rotolanti sferici o a tronco di cono su ralle. Si argomenta qui la tesi che le due piattaforme appartenessero ad un cabestano imbarcato sulla poppa della nave per salpare la pesantissima ancora, per spostare la nave nel lago o per collegarla in qualche modo alle rive. La posizione dei reperti ritrovati sulla nave, la stretta analogia con un cabestano raffigurato in un mosaico di Ostia, la presenza di un una base di appoggio, di un collare di bronzo e anche di numerosi nottolini sono elementi a sostegno della tesi posta. La base permette di identificare la presenza del cabestano fra le ordinate 105 e 110 di questa nave. Viene infine tentata una ricostruzione della macchina con le sue possibili modifiche allora apportate e le possibili varianti di progetto. A capstain on the first Roman ship from the Nemi lake The discovery on the first of the Nemi ships of parts of two so-called rotating platforms has given rise to numerous hypotheses on their use. The topic is particularly interesting since it is the first known use of spherical or truncated cone rolling elements on axial bearings. Here the thesis is argued that the two platforms belonged to a capstan embarked on the stern of the ship to sail the very heavy anchor, to move the ship in the lake or to connect it in some way to the shores. The position of the artifacts found on the ship, the close analogy with a capstan depicted in a mosaic of Ostia, the presence of a support base, a bronze collar and also numerous pawls are elements in support of the thesis. The base allows to identify the presence of the capstan between the frames 105 and 110 of this ship. Finally, a reconstruction of the machine is attempted with its possible modifications made at the time and the possible design variants.
Compatibility of transport effects in non-Hermitian nonreciprocal systems
Creators: name: Ghaemi-Dizicheh, Hamed
name: Schomerus, Henning
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Optics (physics.optics)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Based on a general transport theory for non-reciprocal non-Hermitian systems and a topological model that encompasses a wide range of previously studied models, we (i) provide conditions for effects such as reflectionless and transparent transport, lasing, and coherent perfect absorption, (ii) identify which effects are compatible and linked with each other, and (iii) determine by which levers they can be tuned independently. For instance, the directed amplification inherent in the non-Hermitian skin effect does not enter the spectral conditions for reflectionless transport, lasing, or coherent perfect absorption, but allows to adjust the transparency of the system. In addition, in the topological model the conditions for reflectionless transport depend on the topological phase, but those for coherent perfect absorption do not. This then allows us to establish a number of distinct transport signatures of non-Hermitian, nonreciprocal, and topological behaviour, in particular (I) reflectionless transport in a direction that depends on the topological phase, (II) invisibility coinciding with the skin-effect phase transition of topological edge states, and (III) coherent perfect absorption in a system that is transparent when probed from one side.
description: 10 pages, 4 figures, 1 table
Draft version for stakeholder interaction and discussion - 1+MG Incidental Findings Policy - Summary and Recommendations
Creators: name: Rebers, Susanne
name: Thorogood, Adrian
name: B1MG WP2
name: 1+MG WG2
Publisher: name: Zenodo
Year: 2022
Subjects: B1MG
Beyond 1 Million Genomes
1+MG
1 Million Genomes Initiative
ELSI
Incidental Findings
genome sequence data

description: Analysis of whole genome sequence data can reveal information of clinical relevance to data subjects and their family members (incidental findings (IFs), broadly defined here to include any individual finding of clinical relevance, whether related or unrelated to the aims of secondary use (e.g. research project or healthcare diagnosis)). Clinicians and researchers have legal and ethical obligations to appropriately handle IFs in a manner that shows due concern for the welfare of data subjects and their family members. The likelihood of IFs in healthcare and research contexts, as well as the benefits, risks, and costs of reporting them, are not fully understood. European healthcare and research organisations tend to handle IFs cautiously. 1+MG aims to facilitate the secondary use of pseudonymised genomic and related-health data for the purposes of research, health-care and policy-making. The scope of this policy therefore focuses on genomic IFs revealed in secondary use contexts. The uncertainties surrounding IFs are greater still in secondary use contexts compared to (both clinical and research) primary contexts. Secondary use contexts may be very distant from a patient care context. It is not clear if distant 1+MG data users, especially researchers, have legal and ethical duties of care towards data subjects. Practically speaking, it is also difficult for 1+MG data users to assess if a potential IF is (still) clinically actionable. Secondary use may occur many years after sequencing. The health and familial situation of a 1+MG data subject are not fully known to the data user, and become more uncertain with the passage of time. 1+MG minimum data standards ensure sufficient data quality to enable secondary use, but the data may not be suitable for informing diagnosis of the original data subjects or their family members. A key practical difficulty in cross-border, secondary use contexts is that the data user does not know what IF policy applied in the initial healthcare or research context. Efforts to communicate an IF from secondary use may be undermined if the IF has already been returned to the data subject or family members. Another practical difficulty in cross-border secondary use contexts is that reporting IFs requires dedicated coordination and collaboration between data users, 1+MG coordinating bodies, data submitters, and (designated) healthcare professionals. Because of this context, reporting of IFs should be handled cautiously.
Editorial - International Journal of Sustainable Energy Planning and Management Vol 30
Creators: name: Østergaard, Poul Alberg
name: Johannsen, Rasmus Magni
Publisher: name: International Journal of Sustainable Energy Planning and Management
Year: 2021

description: This editorial introduces the main findings from the 30th Volume of the International Journal of Sustainable Energy Planning and Management. This volume probes into analyses of the technical interactions between multi-energy carrier energy hubs and the role and feasibility of cogeneration of heat and power in a Portuguese context. It moves on to analyse the framework for implementing photo voltaic technology and decision processes for implementing PV technology. Lastly, it presents work on the role of renewable energy sources in meeting carbon dioxide emission reduction goals in Iran.
description: International Journal of Sustainable Energy Planning and Management, Vol. 30 (2021)
Measurement of the eta-Meson Mass using psi(2S) --> eta J/psi
Creators: name: Miller, D. H.
name: Collaboration, CLEO
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We measure the mass of the eta meson using psi(2S) --> eta J/psi events acquired with the CLEO-c detector operating at the CESR e+e- collider. Using the four decay modes eta --> gamma gamma, 3pi0, pi+pi-pi0, and pi+pi-gamma, we find M(eta)=547.785 +- 0.017 +- 0.057 MeV, in which the first uncertainty is statistical and the second systematic. This result has an uncertainty comparable to the two most precise previous measurements and is consistent with that of NA48, but is inconsistent at the level of 6.5sigma with the much smaller mass obtained by GEM.
description: 10 pages postscript,also available through http://www.lns.cornell.edu/public/CLNS/2007/, Submitted to PRL