cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
skweak: Weak Supervision Made Easy for NLP
Creators: name: Lison, Pierre
name: Barnes, Jeremy
name: Hubin, Aliaksandr
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computation and Language (cs.CL)
subject: Artificial Intelligence (cs.AI)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: We present skweak, a versatile, Python-based software toolkit enabling NLP developers to apply weak supervision to a wide range of NLP tasks. Weak supervision is an emerging machine learning paradigm based on a simple idea: instead of labelling data points by hand, we use labelling functions derived from domain knowledge to automatically obtain annotations for a given dataset. The resulting labels are then aggregated with a generative model that estimates the accuracy (and possible confusions) of each labelling function. The skweak toolkit makes it easy to implement a large spectrum of labelling functions (such as heuristics, gazetteers, neural models or linguistic constraints) on text data, apply them on a corpus, and aggregate their results in a fully unsupervised fashion. skweak is especially designed to facilitate the use of weak supervision for NLP tasks such as text classification and sequence labelling. We illustrate the use of skweak for NER and sentiment analysis. skweak is released under an open-source license and is available at: https://github.com/NorskRegnesentral/skweak
La «pax» concessa da Angelo Ingegneri al genovese Andronico Garbarino nel 1581
Creators: name: Dallasta, Federica
Publisher: name: Griseldaonline
Year: 2023

description: Nel 1581 il poeta veneziano Angelo Ingegneri e il dottore in legge genovese Andronico Garbarino si recano dal notaio parmigiano Giovanni Maria Amitta per siglare una ‘pace’ ed evitare in questo modo il duello. Qualche tempo prima il Garbarino aveva insultato e schiaffeggiato l’Ingegneri per motivi che non vengono riportati nel documento. Se il Garbarino era abituato alla violenza, tanto che era fuggito da Genova dopo aver ucciso un uomo nell’ambito della competizione violenta fra la fazione dei ‘vecchi’ e quella dei ‘nuovi’, Ingegneri sembra essere stato più pacifico, anche se in quello stesso anno 1581 si permise di pubblicare a Parma la Gerusalemme liberata di Torquato Tasso senza l’autorizzazione dell’autore, che in quel momento si trovava imprigionato a Ferrara, e senza riconoscergli alcuna soddisfazione economica. L’affondo offre l’occasione per qualche riflessione sull’antico codice dell’onore espresso da Ariosto e Tasso, sulla trattatistica sul duello edita negli stati italiani in epoca moderna e sugli sforzi delle Congregazioni romane dell’Indice del Sant’Uffizio per limitare la pratica del duello. Nelle appendici si elencano i trattati sul duello stampati in Italia fra il xvi e il xviii secolo e si trascrive l’atto notarile della ‘pace’.
description: Griseldaonline, V. 22 N. 2 (2023): Tribunali
THE ACOUSTICS OF AUTOMOTIVE MUFFLERS: 1D-3D BEM ANALYSES, EXPERIMENTAL VALIDATION AND OPTIMIZATION
Creators: name: Auriemma, Fabio
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2011

description: A number of numerical and experimental studies, performed in the field of technical
flow duct acoustics, are presented in this thesis. The analyses have been implemented on the automotive mufflers, and the fluid-dynamic aspects have been taken into account too.
The noise attenuation characteristics of a three pass perforated muffler with final end resonator have been investigated. Acoustic performances have been quantified by the Transmission Loss (TL) parameter, and different numerical methods have been adopted. Firstly, a non-linear one-dimensional (1D) time domain approach is utilized to predict the TL profile in a low frequency range. Secondly, a linear three dimensional (3D) boundary element method (BEM), in the frequency domain, has been utilized to obtain more accurate results at higher frequencies. The effects on muffler performance of different mean flow velocities and gas temperatures have been investigated too.
Advantages and disadvantages of the above mentioned numerical approaches have been highlighted by analyzing a two-tube cross-flow commercial muffler. Besides the obvious differences due to the non linear/linear and 1D/3D formulations, the 1D method has been successfully used  in simulations where a mean flow was present. On the other hand,  after importing the results of a previously modal analysis, a complex BEM fluid-structure interaction analysis has been performed. Interesting results about the structure excitation, at certain frequencies, have been carried out. Moreover, the radiated noise has been assessed, once imposed a certain excitation at inlet.
An experimental campaign has been carried out in the acoustic laboratory of Tallinn University of Technologies (TTU), Estonia, aimed to validate the above numerical results. Testes  have put in evidence the strong effects, on muffler performances,  of the constructive features related to the manufacturing process, such as the coupling of adjacent surfaces and the actual shape of  components. Hence, although numerical analyses are usually performed on ideal geometries (perfectly matched and shaped), when the behaviour of a real muffler must be simulated, a more detailed schematization must be used. To this aim, a number of tricks are suggested.
A brand new acoustic optimization procedure, based on a 1D non-linear solver coupled to a genetic algorithm through a number of external routines, has been developed, aimed to maximize the acoustical attenuation or to find the best tradeoff between acoustical and fluid-dynamic performances. The proposed approach constitutes a valid instrument to improve the muffler design process, providing a consistent enhancement of TL and a contemporary reduction of back pressure for the examined case.
The non-linear perturbation of a black hole by gravitational waves. I. The Bondi-Sachs mass loss
Creators: name: Frauendiener, Jörg
name: Stevens, Chris
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The excitation of a black hole by infalling matter or radiation has been studied for a long time, mostly in linear perturbation theory. In this paper we study numerically the response of a Schwarzschild black hole to an incoming gravitational wave pulse. We present a numerically well-posed initial boundary value problem for the generalized conformal field equations in which a wave profile for the ingoing wave is specified at an outer time-like boundary which then hits an initially static and spherically symmetric black hole. The non-linear interaction of the black hole with the gravitational wave leads to scattered radiation moving back out. The clean separation between initial state and incoming radiation makes this setup ideal to study scattering problems. The use of the conformal field equations allows us to trace the response of the black hole to null infinity where we can read off the scattered gravitational waves and compute the Bondi-Sachs mass and the gravitational flux through $\mathscr{I}$. In this way we check the Bondi-Sachs mass loss formula directly on null infinity. We also comment on comparisons with quasinormal modes.
description: 27 pages, 9 figures. Submitted to CQG focus issue on time-like boundaries
The Search for Million Degree Gas Through The NVII Hyperfine Line
Creators: name: Bregman, Joel N.
name: Irwin, Jimmy A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Gas in the million degree range occurs in a variety of astronomical environments, and it may be the main component of the elusive missing baryons at low redshift. The NVII ion is found in this material and it has a hyperfine spin-flip transition with a rest frequency of 53.042 GHz, which can be observed for z > 0.1, when it is shifted into a suitably transparent radio band. We used the 42-48 GHz spectrometer on the Green Bank Telescope to search for both emission and absorption from this NVII transmission. For absorption studies, 3C273, 3C 279, 3C 345, and 4C+39.25 were observed but no feature were seen above the 5 sigma level. For emission line studies, we observed Abell 1835, Abell 2390 and the star-forming galaxy PKS 1345+12, but no features were seen exceeding 5 sigma. We examine whether the strongest emission feature, in Abell 2390 (3.7 sigma), and the strongest absorption feature, toward 4C+39.25 (3.8 sigma), might be expected from theoretical models. The emission feature would require ~1E10 Msolar of 1E6 K gas, which is inconsistent with X-ray limits for the O VII Kalpha line, so it is unlikely to be real. The NVII absorption feature requires a NVII column of 6E16 cm^-2, higher than model predictions by at least an order of magnitude, which makes it inconsistent with model expectations. The individual observations were less than 1 hr in length, so for lengthy observations, we show that NVII absorption line observations can begin to be useful in in the search for hot intergalactic gas.
description: 27 total pages; 16 figures; Accepted for publication in The Astrophysical Journal
From student to beginning teacher: Learning strengths and teaching challenges
Creators: name: McGlynn-Stewart, Monica
Publisher: name: Taylor & Francis
Year: 2015
Subjects: subject: Sociology
subject: FOS: Sociology
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences

description: This research examined how the professional practice of Canadian beginning elementary teachers was influenced by their own early learning experiences in school. Six teachers were observed and interviewed in their classrooms five times over the first three years of their teaching career. Case studies were developed for each teacher and themes were explored across cases. The findings from this study suggest that pre-service and in-service teacher education programs need to provide teachers with opportunities to critically examine how their relative strengths and weaknesses as pupils may affect their performance and identity as teachers.
Trade Perspectives in Institutional Economics: John R. Commons, his work, and the protective tariff
Creators: name: Gillis, Katherine
Publisher: name: University of Chicago
Year: 2021
Subjects: subject: John R. Commons
subject: Institutionalist Economics
subject: Institutional Economists
subject: Trade History
subject: Tariff History

description: John R. Commons was one of the leading academics of the institutional economics movement whose legacy and influence is felt to this day in the work of labor legislation, collective bargaining agreements, the Legal Realist movement and of course the institutionalist movements (both old and new). Given that Commons is known as a staunch advocate for the working man, one might suspect that he favored protective tariffs for the positive impact they could have on laborers’ wage rates. However, through analyzing his publications, it is clear that Commons was pessimistic about their design in theory and critical of their effects in practice.
Physical Characterization of Serendipitously Uncovered Millimeter-wave Line-emitting Galaxies at z~2.5 behind the Local Luminous Infrared Galaxy VV114
Creators: name: Mizukoshi, S.
name: Kohno, K.
name: Egusa, F.
name: Hatsukade, B.
name: Minezaki, T.
name: Saito, T.
name: Tamura, Y.
name: Iono, D.
name: Ueda, J.
name: Matsuda, Y.
name: Kawabe, R.
name: Lee, M. M.
name: Yun, M. S.
name: Espada, D.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present a detailed investigation of millimeter-wave line emitters ALMA J010748.3-173028 (ALMA-J0107a) and ALMA J010747.0-173010 (ALMA-J0107b), which were serendipitously uncovered in the background of the nearby galaxy VV114 with spectral scan observations at $λ$ = 2 - 3 mm. Via Atacama Large Millimeter/submillimeter Array (ALMA) detection of CO(4-3), CO(3-2), and [CI](1-0) lines for both sources, their spectroscopic redshifts are unambiguously determined to be $z= 2.4666\pm0.0002$ and $z=2.3100\pm0.0002$, respectively. We obtain the apparent molecular gas masses $M_{\rm gas}$ of these two line emitters from [CI] line fluxes as $(11.2 \pm 3.1) \times 10^{10} M_\odot$ and $(4.2 \pm 1.2) \times 10^{10} M_\odot$, respectively. The observed CO(4-3) velocity field of ALMA-J0107a exhibits a clear velocity gradient across the CO disk, and we find that ALMA-J0107a is characterized by an inclined rotating disk with a significant turbulence, that is, a deprojected maximum rotation velocity to velocity dispersion ratio $v_{\rm max}/σ_{v}$ of $1.3 \pm 0.3$. We find that the dynamical mass of ALMA-J0107a within the CO-emitting disk computed from the derived kinetic parameters, $(1.1 \pm 0.2) \times 10^{10}\ M_\odot$, is an order of magnitude smaller than the molecular gas mass derived from dust continuum emission, $(3.2\pm1.6)\times10^{11}\ M_{\odot}$. We suggest this source is magnified by a gravitational lens with a magnification of $μ\gtrsim10$, which is consistent with the measured offset from the empirical correlation between CO-line luminosity and width.
description: 19 pages, 11 figures, accepted for publication in ApJ
Teacher education physical education: In search of a hybrid space
Creators: name: Lynch, Timothy
Publisher: name: Taylor & Francis
Year: 2015
Subjects: subject: 110309 Infectious Diseases
subject: FOS: Health sciences
subject: Science Policy
subject: Biological Sciences
subject: Sociology
subject: FOS: Sociology
subject: Ecology
subject: FOS: Biological sciences
subject: Earth and Environmental Sciences
subject: Biotechnology

description: It is argued that a learning environment underpinned by a strengths-based collaborative approach between universities and schools offers extended pre-service teacher learning opportunities and subsequently enhanced preparation. The term “hybrid space” describes the ideal environment of shared partnership where knowledge is jointly created, and consequently, as too is collaborative egalitarianism between stakeholders. This study investigates a possible “hybrid space” course within Physical Education Teacher Education (PETE) in the UK. While much literature discusses the advantages of the “hybrid space” ideal across education disciplines, high-quality research into PETE hybrid spaces is limited, if not non-existent. Hence, the particular course was chosen for data collection as it advocates intricate connections with schools in the local community. Furthermore, the course was awarded “Outstanding” by the national regulatory authority, England and Wales Office for Standards in Education (Ofsted), one of the major reasons explicitly stated was for its community connections. A qualitative, interpretive study using a case study methodology was adopted to examine the successful primary PETE course. The findings offer insights into the ideal of hybrid spaces in PETE, which appear to benefit various stakeholders within communities. The study is significant as it assists teacher educators from around the world, challenged to rethink their connections between university courses and school field experiences through illustrating a highly successful example.
'Verba Chrysidis morientis'. Note filologiche ed esegetiche a Eugraph. ad Ter. Andr. 282-298
Creators: name: Pirovano, Luigi
Publisher: name: Griseldaonline
Year: 2023

description: Il contributo propone un’analisi filologica del commento di Eugrafio ad Andr. 281-298 (27,3-29,15 W.): vengono discussi ed interpretati i passaggi che sembrano maggiormente problematici e, dove necessario, sono suggerite delle proposte di emendazione al testo stabilito da Wessner. L’analisi dei singoli loci critici offre anche l’occasione per mettere in luce alcuni problemi teorici e pratici che non sono stati opportunamente affrontati da Wessner e con cui, pertanto, dovrà necessariamente confrontarsi il futuro editore del commentario.

 

 
description: Griseldaonline, V. 22 N. 2 (2023): Tribunali
Efficient split-step schemes for fluid-structure interaction involving incompressible generalised Newtonian flows
Creators: name: Schussnig, R.
name: Pacheco, D. R. Q.
name: Fries, T. -P.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computational Engineering, Finance, and Science (cs.CE)
subject: Dynamical Systems (math.DS)
subject: Computational Physics (physics.comp-ph)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 74F10, 76A05, 76M10, 74L15, 76D05

description: Blood flow, dam or ship construction and numerous other problems in biomedical and general engineering involve incompressible flows interacting with elastic structures. Such interactions heavily influence the deformation and stress states which, in turn, affect the engineering design process. Therefore, any reliable model of such physical processes must consider the coupling of fluids and solids. However, complexity increases for non-Newtonian fluid models, as used, e.g., for blood or polymer flows. In these fluids, subtle differences in the local shear rate can have a drastic impact on the flow and hence on the coupled problem. There, existing (semi-)implicit solution strategies based on split-step or projection schemes for Newtonian fluids are not applicable, while extensions to non-Newtonian fluids can lead to substantial numerical overhead depending on the chosen fluid solver. To address these shortcomings, we present here a higher-order accurate, added-mass-stable fluid-structure interaction scheme centered around a split-step fluid solver. We compare several implicit and semi-implicit variants of the algorithm and verify convergence in space and time. Numerical examples show good performance in both benchmarks and an idealised setting of blood flow through an abdominal aortic aneurysm considering physiological parameters.
description: 41 pages, 19 figures, 4 tables, accepted manuscript
From student to beginning teacher: Learning strengths and teaching challenges
Creators: name: McGlynn-Stewart, Monica
Publisher: name: Taylor & Francis
Year: 2015
Subjects: subject: Science Policy
subject: Biological Sciences
subject: Sociology
subject: FOS: Sociology

description: This research examined how the professional practice of Canadian beginning elementary teachers was influenced by their own early learning experiences in school. Six teachers were observed and interviewed in their classrooms five times over the first three years of their teaching career. Case studies were developed for each teacher and themes were explored across cases. The findings from this study suggest that pre-service and in-service teacher education programs need to provide teachers with opportunities to critically examine how their relative strengths and weaknesses as pupils may affect their performance and identity as teachers.
Sum-rules and bath-parametrization for quantum cluster theories
Creators: name: Koch, Erik
name: Sangiovanni, Giorgio
name: Gunnarsson, Olle
Publisher: name: arXiv
Year: 2008
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We analyze cellular dynamical mean-field theory (CDMFT) and the dynamical cluster approximation (DCA). We derive exact sum-rules for the hybridization functions and give examples for DMFT, CDMFT, and DCA. For impurity solvers based on a Hamiltonian, these sum-rules can be used to monitor convergence of the bath-parametrization. We further discuss how the symmetry of the cluster naturally leads to a decomposition of the bath Green matrix into irreducible components, which can be parametrized independently, and give an explicit recipe for finding the optimal bath-parametrization. As a benchmark we revisit the one-dimensional Hubbard model. We carefully analyze the evolution of the density as a function of chemical potential and find that, close to the Mott transition, convergence with cluster size is unexpectedly slow. In two dimensions we find, that we need so many bath-sites to obtain a reliable parametrization that Lanczos calculations are hardly feasible with current computers. For such large baths our symmetry-adapted approach should prove crucial for finding a reliable bath-parametrization.
description: 11 pages, 14 figures
«Infamem annum pestilentia fecerit». La prima 'quaestio de veneficiis' a Roma
Creators: name: Todaro, Giovanna
Publisher: name: Griseldaonline
Year: 2023

description: L’articolo analizza la quaestio de veneficiis del 331 a. C., la prima nella storia di Roma (Liv. viii 18), sviluppatasi da una delle tante pestilentiae del periodo altorepubblicano, culminata nel processo per veneficium e nella condanna di un folto gruppo di matrone. Alla base della vicenda vi è l’interferenza di piani fra sicurezza pubblica, salute dei cittadini e comportamento femminile, che genera due soluzioni distinte, una giudiziaria e laica (la quaestio) e una religiosa e prodigiale (il clavus a dictatore fixus). Se nella versione liviana l’aspetto processuale si presenta oggettivo e cronachistico, più problematico appare quello religioso, anche per la dimensione politica che viene proiettata su tutta la vicenda dall’associazione delle matrone venefiche alle rivolte plebee, risolte tramite lo stesso piaculum.
description: Griseldaonline, V. 22 N. 2 (2023): Tribunali
Viscous Torque and Dissipation in the Inner Region of a Thin Accretion Disk: Implications for Measuring Black Hole Spin
Creators: name: Shafee, Rebecca
name: Narayan, Ramesh
name: McClintock, Jeffrey E.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We consider a simple Newtonian model of a steady accretion disk around a black hole. The model is based on height-integrated hydrodynamic equations, alpha-viscosity, and a pseudo-Newtonian potential that results in an innermost stable circular orbit (ISCO) that closely approximates the one predicted by GR. We find that the hydrodynamic models exhibit increasing deviations from the standard disk model of Shakura & Sunyaev as disk thickness H/R or the value of alpha increases. The latter is an analytical model in which the viscous torque is assumed to vanish at the ISCO. We consider the implications of the results for attempts to estimate black hole spin by using the standard disk model to fit continuum spectra of black hole accretion disks. We find that the error in the spin estimate is quite modest so long as H/R < 0.1 and alpha < 0.2. At worst the error in the estimated value of the spin parameter is 0.1 for a non-spinning black hole; the error is much less for a rapidly spinning hole. We also consider the density and disk thickness contrast between the gas in the disk and that inside the ISCO. The contrast needs to be large if black hole spin is to be successfully estimated by fitting the relativistically-broadened X-ray line profile of fluorescent iron emission from reflection off an accretion disk. In our hydrodynamic models, the contrast in density and thickness is low when H/R>0.1, sugesting that the iron line technique may be most reliable in extemely thin disks. We caution that these results have been obtained with a viscous hydrodynamic model and need to be confirmed with MHD simulations of radiatively cooled thin disks.
description: 32 pages, 10 figures; accepted by ApJ
Achieving spin-squeezed states by quench dynamics in a quantum chain
Creators: name: Cheraghi, Hadi
name: Mahdavifar, Saeed
name: Johannesson, Henrik
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study the time evolution of spin squeezing in the one-dimensional spin-1/2 XY model subject to a sudden quantum quench of a transverse magnetic field. The initial state is selected from the ground state phase diagram of the model, consisting of ferro- and paramagnetic phases separated by a critical value of the transverse field. Our analysis, based on exact results for the model, reveals that by a proper choice of protocol, a quantum quench from an unsqueezed state can create spin squeezed nonequilibrium states. We also identify a nonanalyticity in the long-time average of the spin-squeezing parameter when quenching to the equilibrium quantum critical point. This suggests that the ferro- and paramagnetic phases also define distinct phases for how the transverse field redistributes quantum fluctuations among the spin components away from equilibrium.
description: 14 pages, 10 figures, Revised version, Added references, corrected calculation of off-diagonal spin correlations
Simulation of Variable Speed Wind Turbines based on Open-Source Solutions: application to Bachelor and Master Degrees
Creators: name: Fernández-Guillamón, Ana
name: Molina-García, Angel
Publisher: name: arXiv
Year: 2021
Subjects: subject: Systems and Control (eess.SY)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: This paper describes variable speed wind turbine (Types 3 and 4, IEC 61400-27-1) simulations based on an open-source solution to be applied to Bachelor and Master Degrees. It is an attempt to improve the education quality of such sustainable energy by giving an open-source experimental environment for both undergraduate and graduate students. Indeed, among the renewable sources, wind energy is currently becoming essential in most power systems. The simulations include both one-mass and two-mass mechanical models, as well as pitch angle control. A general overview of the structure, control, and operation of the variable speed wind turbine is provided by these easy-to-use interactive virtual experiments. In addition, a comparison between commercial and open-source software packages is described and discussed in detail. Examples and extensive results are also included in the paper. The models are available in Scilab-Xcos file exchange for power system education and researcher communities.
description: 9 pages, 18 figures
Inclusive chi_bJ(nP) Decays to D0 X
Creators: name: CLEO Collaboration
name: Briere, R. A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Using Upsilon(2S) and Upsilon(3S) data collected with the CLEO III detector we have searched for decays of chi_bJ to final states with open charm. We fully reconstruct D0 mesons with p_D0 > 2.5 GeV/c in three decay modes (K-pi+, K-pi+pi0, and K-pi-pi+pi+) in coincidence with radiative transition photons that tag the production of one of the chi_bJ(nP) states. We obtain significant signals for the two J=1 states. Recent NRQCD calculations of chi_{bJ}(nP) --> c cbar X depend on one non-perturbative parameter per chi_bJ triplet. The extrapolation from the observed D0 X rate over a limited momentum range to a full c cbar X rate also depends on these same parameters. Using our data to fit for these parameters, we extract results which agree well with NRQCD predictions, confirming the expectation that charm production is largest for the J=1 states. In particular, for J=1, our results are consistent with c cbar g accounting for about one-quarter of all hadronic decays.
description: Version 2 updates include corrections to important errors in Table V and VII column headers which summarize results, and additional minor edits. 17 pages, available through http://www.lns.cornell.edu/public/CLNS/
Exploring an S-matrix for gravitational collapse
Creators: name: Veneziano, G.
name: Wosiek, J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We analyze further a recently proposed S-matrix description of transplanckian scattering in the specific case of axisymmetric collisions of extended sources, where some of the original approximations are not necessary. We confirm the claim that such an approximate description appears to capture the essential features of (the quantum counterpart of) classical gravitational collapse. More specifically, the S-matrix develops singularities whose location in the sources' parameter space are consistent with (and numerically close to) the bounds coming from closed-trapped-surface collapse criteria. In the vicinity of the critical "lines" the phase of the elastic S-matrix exhibits a universal fractional-power behaviour reminiscent of Choptuik's scaling near critical collapse.
description: 15 pages, 6 figures
Supplemental Material for Hulst, De Jong, and Bijma, 2020
Creators: name: Hulst, Andries D.
name: Jong, Mart C. M. De
name: Bijma, Piter
Publisher: name: GSA Journals
Year: 2021
Subjects: subject: 70201 Animal Breeding
subject: FOS: Animal and dairy science
subject: 70704 Veterinary Epidemiology
subject: FOS: Veterinary sciences

description: Table S1 contains mean (over 20 replicates) observed scale heritability estimates for disease status for different genetic standard deviations in susceptibility.
FigureS2 contains a schematic overview of the steps used in the simulations.FileS3 contains the R-code used to simulate populations with genetic and permanent environmental variation in susceptibility.FileS4 contains the R-code used to simulate the endemic infectious disease.
Scuola, accademia, eloquenza. Luigi Maria Rezzi e i suoi rapporti epistolari nella Roma dell’Ottocento
Creators: name: Saverna, Ludovica
Publisher: name: Griseldaonline
Year: 2023

description: La Roma ottocentesca, lungi dall’essere condizionata esclusivamente da censura e moralismo ecclesiastico, si presenta come vivace teatro culturale, luogo in cui prolificano scuole, università, accademie, caffè e circoli privati. Prendendo in esame l’attività di un docente e letterato quale Luigi Maria Rezzi (1785-1857), che frequenta e influenza molti dei succitati luoghi d’erudizione, si analizzano anche le memorie e le epistole lasciate dal circolo di giovani romani che costituiva la sua scuola. Quegli stessi giovani confluiranno, in buona parte, all’interno dell’élite letteraria, cittadina e non solo, del xix secolo e della prima parte del successivo. Attraverso le lettere scritte e ricevute dal docente, l’analisi dei legami e dei molteplici ruoli da lui ricoperti, si può ricostruire, così, una fitta rete di rapporti, un insieme di dati biografici che permettono di aggiungere nuovi elementi al quadro della Roma pontificia di quegli anni.

 

 
description: Griseldaonline, V. 22 N. 2 (2023): Tribunali
Wightman function and vacuum densities for a Z_2-symmetric thick brane in AdS spacetime
Creators: name: Saharian, A. A.
name: Mkhitaryan, A. L.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Positive frequency Wightman function, vacuum expectation values of the field square and the energy-momentum tensor induced by a Z_{2}-symmetric brane with finite thickness located on (D+1)- dimensional AdS background are evaluated for a massive scalar field with general curvature coupling parameter. For the general case of static plane symmetric interior structure the expectation values in the region outside the brane are presented as the sum of free AdS and brane induced parts. For a conformally coupled massless scalar the brane induced part in the vacuum energy-momentum tensor vanishes. In the limit of strong gravitational fields the brane induced parts are exponentially suppressed for points not too close to the brane boundary. As an application of general results a special model is considered in which the geometry inside the brane is a slice of the Minkowski spacetime orbifolded along the direction perpendicular to the brane. For this model the Wightman function, vacuum expectation values of the field square and the energy-momentum tensor inside the brane are evaluated as well and their behavior is discussed in various asymptotic regions of the parameters. It is shown that for both minimally and conformally coupled scalar fields the interior vacuum forces acting on the brane boundaries tend to decrease the brane thickness.
description: 25 pages, 6 figures, discussion added
B-Meson Observables in the Maximally CP-Violating MSSM with Minimal Flavour Violation
Creators: name: Ellis, John
name: Lee, Jae Sik
name: Pilaftsis, Apostolos
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Additional sources of CP violation in the MSSM may affect B-meson mixings and decays, even in scenarios with minimal flavour violation (MFV). We formulate the maximally CP-violating and minimally flavour-violating (MCPMFV) variant of the MSSM, which has 19 parameters, including 6 phases that violate CP. We then develop a manifestly flavour-covariant effective Lagrangian formalism for calculating Higgs-mediated FCNC observables in the MSSM at large tan(beta), and analyze within the MCPMFV framework FCNC and other processes involving B mesons. We include a new class of dominant subleading contributions due to non-decoupling effects of the third-generation quarks. We present illustrative numerical results that include effects of the CP-odd MCPMFV parameters on Higgs and sparticle masses, the B_s and B_d mass differences, and on the decays B_s --> mu+ mu-, B_u --> tau nu and b --> s gamma. We use these results to derive illustrative constraints on the MCPMFV parameters imposed by D0, CDF, BELLE and BABAR measurements of B mesons, demonstrating how a potentially observable contribution to the CP asymmetry in the b --> s gamma decay may arise in the MSSM with MCPMFV.
description: 47 pages, 8 eps figures, comments and references added, accepted for publication in Physical Review D, Eq.(3.2) corrected
Calculus of multilinear differential operators, operator $L_\infty$-algebras and ${\it IBL}_\infty$-algebras
Creators: name: Bashkirov, Denis
name: Markl, Martin
Publisher: name: arXiv
Year: 2021
Subjects: subject: Algebraic Topology (math.AT)
subject: Quantum Algebra (math.QA)
subject: FOS: Mathematics
subject: Primary 32W99, 18M60, secondary 53D55

description: We propose an operadic framework suitable for describing algebraic structures with operations being multilinear differential operators of varying orders or, more generally, formal series of such operators. The framework is built upon the notion of a multifiltration of a linear operad generalizing the concept of a filtration of an associative algebra. We describe a particular way of constructing and analyzing multifiltrations based on a presentation of a linear operad in terms of generators and relations. In particular, that allows us to observe a special role played in this context by Lie, Lie-admissible and L-infinity structures. As a main application, and the original motivation for the present work, we show how a certain generalization of the well-known big bracket construction of Lecomte\textendash Roger and Kosmann-Schwarzbach encompassing the case of homotopy involutive Lie bialgebras can be obtained.
description: 60 pages, final version
A Constrained Metropolis-Hastings Search for EMRIs in the Mock LISA Data Challenge 1B
Creators: name: Gair, Jonathan R.
name: Porter, Edward K.
name: Babak, Stanislav
name: Barack, Leor
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We describe a search for the extreme-mass-ratio inspiral sources in the Round 1B Mock LISA Data Challenge data sets. The search algorithm is a Monte-Carlo search based on the Metropolis-Hastings algorithm, but also incorporates simulated, thermostated and time annealing, plus a harmonic identification stage designed to reduce the chance of the chain locking onto secondary maxima. In this paper, we focus on describing the algorithm that we have been developing. We give the results of the search of the Round 1B data, although parameter recovery has improved since that deadline. Finally, we describe several modifications to the search pipeline that we are currently investigating for incorporation in future searches.
description: 13 pages, 3 figures, to be published in proceedings of the 12th Gravitational Wave Data Analysis Workshop; v2 has minor changes for consistency with accepted version
Controlling Pivoting Gait using Graph Model Predictive Control
Creators: name: Zhang, Ang
name: Koyama, Keisuke
name: Wan, Weiwei
name: Harada, Kensuke
Publisher: name: arXiv
Year: 2021
Subjects: subject: Robotics (cs.RO)
subject: Systems and Control (eess.SY)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Pivoting gait is efficient for manipulating a big and heavy object with relatively small manipulating force, in which a robot iteratively tilts the object, rotates it around the vertex, and then puts it down to the floor. However, pivoting gait can easily fail even with a small external disturbance due to its instability in nature. To cope with this problem, we propose a controller to robustly control the object motion during the pivoting gait by introducing two gait modes, i.e., one is the double-support mode, which can manipulate a relatively light object with faster speed, and the other is the quadruple-support mode, which can manipulate a relatively heavy object with lower speed. To control the pivoting gait, a graph model predictive control is applied taking into account of these two gait modes. By adaptively switching the gait mode according to the applied external disturbance, a robot can stably perform the pivoting gait even if the external disturbance is applied to the object.
Urban Building Energy Modeling (UBEM) Tools: A State-of-the-Art Review of bottom-up physics-based approaches
Creators: name: Ferrando, Martina
name: Causone, Francesco
name: Hong, Tianzhen
name: Chen, Yixing
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computers and Society (cs.CY)
subject: FOS: Computer and information sciences

description: Regulations corroborate the importance of retrofitting existing building stocks or constructing new energy efficient district. There is, thus, a need for modeling tools to evaluate energy scenarios to better manage and design cities, and numerous methodologies and tools have been developed. Among them, Urban Building Energy Modeling (UBEM) tools allow the energy simulation of buildings at large scales. Choosing an appropriate UBEM tool, balancing the level of complexity, accuracy, usability, and computing needs, remains a challenge for users. The review focuses on the main bottom-up physics-based UBEM tools, comparing them from a user-oriented perspective. Five categories are used: (i) the required inputs, (ii) the reported outputs, (iii) the exploited workflow, (iv) the applicability of each tool, and (v) the potential users. Moreover, a critical discussion is proposed focusing on interests and trends in research and development. The results highlighted major differences between UBEM tools that must be considered to choose the proper one for an application. Barriers of adoption of UBEM tools include the needs of a standardized ontology, a common three dimensional city model, a standard procedure to collect data, and a standard set of test cases. This feeds into future development of UBEM tools to support cities' sustainability goals.
description: 30 pages, 3 Figures, 4 tables
The history and development of the Euro Info Centre network: with particular reference to the United Kingdom
Creators: name: Phillips, Sarah
Publisher: name: Loughborough University
Year: 2021
Subjects: subject: 89999 Information and Computing Sciences not elsewhere classified
subject: FOS: Computer and information sciences

description: The history and development of the Euro Info Centre network: with particular reference to the United Kingdom
Dalla città-centro alla città-periferia. Giancarlo De Cataldo e la narrazione dei margini
Creators: name: Marziali, Giulia
Publisher: name: Griseldaonline
Year: 2023

description: Il contributo indaga il mutamento della dicotomia centro-periferia della città di Roma attraverso una rilettura della narrativa di Giancarlo De Cataldo. Il racconto dello spazio urbano in Romanzo criminale (2002), Suburra (2013) e La Svedese (2022) offre una rivisitazione crime dell’immaginario periferico romano dalla fine degli anni Settanta al secondo decennio degli anni Zero. L’autore esplora complessità e ambiguità del vivere ai margini del contesto culturale di riferimento, dove la stessa condizione di marginalità non è prerogativa esclusiva delle zone edificate nei pressi delle tangenziali, abitate da diverso tempo da gran parte della popolazione. Il sistema delle infrastrutture innerva il tessuto urbano dialogando con la più lontana città monumentale e divenendo zona identitaria con una propria narrazione da legittimare. Lo studio intende mettere in luce come l’opera narrativa di De Cataldo sia stata capace di rappresentare il mutamento del concetto di periferia e la diversa percezione del degrado territoriale e morale.
description: Griseldaonline, V. 22 N. 2 (2023): Tribunali
Old Metal-rich Globular Cluster Populations: Peak Color and Peak Metallicity Trends with Mass of Host Spheroids
Creators: name: Kravtsov, Valery V.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We address the problem of the factors contributing to a peak color trend of old metal-rich globular cluster (MRGC) populations with mass of their hosts, early-type galaxies and spheroidal subsystems of spiral ones (spheroids). The color-mass trend is often converted to a metallicity-mass trend under the assumption that age effects are small or negligible. While direct estimates of the ages of MRGC populations neither can rule out nor reliably support the populations' age trend, key data on timing of the formation of spheroids and other indirect evidence imply it in the sense: the more massive spheroid the older on average its MRGC population. We show that the contribution of an allowable age trend of the MRGC populations to their peak color trend can achieve up to ~50 % or so. In this event the comparable value of the color trend, ~30 %, is due to alpha-element ratio systematic variations of the order of Delta[alpha/Fe] ~ 0.1 to 0.2 dex because of a correlation between the [alpha/Fe] ratios and age. Hence a systematic variation of exactly [Fe/H] ratios may turn out to be less significant among the contributors, and its range many times lower, i.e. of the order of Delta[Fe/H] ~ 0.1 or even none, than the corresponding range deduced by assuming no age trend.
description: 5 pages, 1 figure, accepted for publication in Astronomische Nachrichten
J-driven Dynamic Nuclear Polarization for sensitizing high field solution state NMR
Creators: name: Concilio, Maria Grazia
name: Kuprov, Ilya
name: Frydman, Lucio
Publisher: name: arXiv
Year: 2021
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: Dynamic nuclear polarization is widely used to enhance the sensitivity of nuclear magnetic resonance. It is presently the method of choice for enhancing the sensitivity of high-field solid state NMR experiments performed under cryogenic conditions. In liquids, however, its efficiency decays rapidly with magnetic field Bo and with the rotational correlation time, leading to negligible enhancements in mid- and high-field solution-state NMR experiments for all but exceptional cases. This study discusses a potential solution to this fundamental sensitivity problem, that relies on biradical species possessing inter-electron exchange couplings, that are on the order of the electron Larmor frequency.
Controlled aggregation of magnetic ions in a semiconductor. Experimental demonstration
Creators: name: Bonanni, A.
name: Navarro-Quezada, A.
name: Li, Tian
name: Wegscheider, M.
name: Matej, Z.
name: Holy, V.
name: Lechner, R. T.
name: Bauer, G.
name: Kiecana, M.
name: Sawicki, M.
name: Dietl, T.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The control on the distribution of magnetic ions into a semiconducting host is crucial for the functionality of magnetically doped semiconductors. Through a structural analysis at the nanoscale, we give experimental evidence that the aggregation of Fe ions in (Ga,Fe)N and consequently the magnetic response of the material are affected by growth rate and co-doping with shallow impurities.
description: 4 pages, 3 figures
Micellization, surface activities and thermodynamics study of dialkylpyridinium [C16pymCn][Br] (n = 1–4) in aqueous solutions
Creators: name: Fu, Dong
name: Gao, Xiaoru
name: Wang, Jue
name: Xie, Yang
name: Yang, Fan
name: Sui, Xin
name: Li, Peng
name: Huang, Bo
name: Zhang, Xiaochen
name: Kan, Kan
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Biophysics
subject: Physical Sciences not elsewhere classified
subject: Microbiology
subject: FOS: Biological sciences
subject: Environmental Sciences not elsewhere classified
subject: Chemical Sciences not elsewhere classified
subject: Ecology
subject: Biological Sciences not elsewhere classified

description: The pyridinium-base ionic liquids surfactants: N-hexadecyl-3-alkylpyridinium bromide [C16pymCn][Br] (n: the carbon numbers of short alkyl side chain, n = 1, 2, 3, 4) were synthesized and characterized by NMR(1H, 13C) and FTIR. The thermal properties of the [C16pymCn][Br] showed a same transition from a crystalline phase to a thermotropic liquid-crystalline phase and then to an isotropic liquid phase, and were thermally stable in the desired temperature range. The critical micelle concentration (CMC) values and surface tension of [C16pymCn][Br] gradually decreases with the increasing length of the side chain from 1 to 4. The temperature dependence of CMC shows typical U-shaped. The surface chemical parameters of all the synthesized surfactants showed moderate surface activity. The calculated thermodynamic parameters showed that the micellization processes of [C16pymCn][Br] are spontaneous, endothermic at low temperatures and exothermic at high temperatures. For the micellization process of [C16pymCn][Br] (n = 1–3) were entropy-driven in the investigated temperature range. The micellization process of [C16pymC4][Br] changes from entropy-driven to enthalpy-driven at high temperature. The standard heat capacity were further discussed. It can be concluded that propyl- and butyl-chain of meta-position can be folded and thus at least partially removed from contact with water.
Generalized Hydrodynamics in the 1D Bose gas: theory and experiments
Creators: name: Bouchoule, Isabelle
name: Dubail, Jérôme
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We review the recent theoretical and experimental progress regarding the Generalized Hydrodynamics (GHD) behavior of the one-dimensional Bose gas with contact repulsive interactions, also known as the Lieb-Liniger gas. In the first section, we review the theory of the Lieb-Liniger gas, introducing the key notions of the rapidities and of the rapidity distribution. The latter characterizes the Lieb-Liniger gas after relaxation and is at the heart of GHD. We also present the asymptotic regimes of the Lieb-Liniger gas with their dedicated approximate descriptions. In the second section we enter the core of the subject and review the theoretical results on GHD in 1D Bose gases. The third and fourth sections are dedicated to experimental results obtained in cold atoms experiments: the experimental realization of the Lieb-Liniger model is presented in section 3, with a selection of key results for systems at equilibrium, and section 4 presents the experimental tests of the GHD theory. In section 5 we review the effects of atom losses, which, assuming slow loss processes, can be described within the GHD framework. We conclude with a few open questions.
description: Review article, 75 pages