cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Mott Phase in Polarized Two-component Atomic Fermi Lattice Gas:A Playground for S=1/2 Heisenberg Model in Magnetic Field
Creators: name: Machida, M.
name: Okumura, M.
name: Yamada, S.
name: Deguchi, T.
name: Ohashi, Y.
name: Matsumoto, H.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We investigate effects of pseudo-spin population imbalance on Mott phases in 1D trapped two-component atomic Fermi gases loaded on optical lattices based on the repulsive Hubbard model in harmonic traps. By using the density matrix renormalization group method, we numerically calculate density profiles of each component and clarify the pseudo-spin magnetism. Consequently, we find that all the features from weakly imbalance to fully polarized cases are well described by S=1/2 antiferromagnetic Heisenberg chain under magnetic field. These results indicate that the Mott phases offer experimental stages for studying various interacting spin systems.
High Penetration of EVs Could Change the Residential Power System (Slides)
Creators: Antonio Ginart
Publisher: name: IEEE
Year: 2021

In a near future, the massive production and deployment of EVs will need to be matched by the availability of an equivalently large number of fast DC charging capabilities. This article explores the possibilities that public DC fast charging systems will not be enough to satisfy the demand for a convenient network of EV charging stations, creating the need for a residential DC fast charger that has the potential to become the enabling block for DC residential systems. DC residential systems also present a natural solution for the integration of solar panels and battery storage. DC fast chargers can efficiently and easily integrate solar energy produced and currently stored on the AC power grid, forming the backbone for a DC residential grid. Furthermore, the infrastructure needed for EV DC fast chargers can easily accept a future migration of other natural DC systems, such as modern air conditioning (A/C), heat pumps, refrigeration, lighting, and ultimately, the other remaining appliances.
In a near future, the massive production and deployment of EVs will need to be matched by the availability of an equivalently large number of fast DC charging capabilities. This article explores the possibilities that public DC fast charging systems will not be enough to satisfy the demand for a convenient network of EV charging stations, creating the need for a residential DC fast charger that has the potential to become the enabling block for DC residential systems. DC residential systems also present a natural solution for the integration of solar panels and battery storage. DC fast chargers can efficiently and easily integrate solar energy produced and currently stored on the AC power grid, forming the backbone for a DC residential grid. Furthermore, the infrastructure needed for EV DC fast chargers can easily accept a future migration of other natural DC systems, such as modern air conditioning (A/C), heat pumps, refrigeration, lighting, and ultimately, the other remaining appliances.
Editoriale
Creators: name: Marescotti, Elena
Publisher: name: Università degli Studi di ferrara
Year: 2019

description: ---
description: Annali online della Didattica e della Formazione Docente, Vol 11, N° 17 (2019): "ognuno resti com'è, diverso dagli altri". Plurilinguismo, multilinguismo, multiculturalismo
Bose-Einstein Condensation in the Relativistic Ideal Bose Gas
Creators: name: Grether, M.
name: de Llano, M.
name: Baker, George A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The Bose-Einstein condensation (BEC) critical temperature in a relativistic ideal Bose gas of identical bosons, with and without the antibosons expected to be pair-produced abundantly at sufficiently hot temperatures, is exactly calculated for all boson number-densities, all boson point rest masses, and all temperatures. The Helmholtz free energy at the critical BEC temperature is found to be lower, thus implying that the omission of antibosons always leads to the computation of a metastable state.
description: 10 pages, 4 figures
Presentazione del numero monografico "'ognuno resti com'è, diverso dagli altri'. Plurilinguismo, multilinguismo, multiculturalismo"
Creators: name: Longobardi, Monica
Publisher: name: Università degli Studi di ferrara
Year: 2019

description: ---
description: Annali online della Didattica e della Formazione Docente, Vol 11, N° 17 (2019): "ognuno resti com'è, diverso dagli altri". Plurilinguismo, multilinguismo, multiculturalismo
Chirality-induced zigzag domain wall in in-plane magnetized ultrathin films
Creators: name: Chen, Gong
name: Robertson, MacCallum
name: Kwon, Heeyoung
name: Won, Changyeon
name: Schmid, Andreas K.
name: Liu, Kai
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The domain structure in in-plane magnetized Fe/Ni/W(110) films is investigated using spin-polarized low-energy electron microscopy. A novel transition of the domain wall shape from a zigzag-like pattern to straight is observed as a function of the film thickness, which is triggered by the transition of the domain wall type from out-of-plane chiral wall to in-plane Néel wall. The contribution of the Dzyaloshinskii-Moriya interaction to the wall energy is proposed to explain the transition of the domain wall shape, which is supported by Monte-Carlo simulations.
description: 12 pages, 3 figures
Permeability Investigation of Compacted Bentonite-Treated Lateritic Soil Liner Using a Consolidation Test
Creators: name: Nutthachai Prongmanee
Publisher: name: Faculty of Engineering Mahasasakham University
Year: 2021
Subjects: Lateritic soil
Bentonite
Compacted clay liner
Permeability
NaCl solutions

description: Mahasarakham International Journal of Engineering Technology, 7, 1, 1-5
Nota introduttiva
Creators: name: Ghetti, Margherita
Publisher: name: Università degli Studi di ferrara
Year: 2019

description: ---
description: Annali online della Didattica e della Formazione Docente, Vol 11, N° 17 (2019): "ognuno resti com'è, diverso dagli altri". Plurilinguismo, multilinguismo, multiculturalismo
Integrated Fuzzy Logic and AHP-TOPSIS for Suitable Turbine Set Selection of Pumped Hydro Storage Powerplant: A Case Study from Thailand
Creators: name: Suthinee Wiangdow
Publisher: name: Faculty of Engineering Mahasasakham University
Year: 2021
Subjects: MCDA
fuzzy logic
fuzzy AHP
fuzzy TOPSIS

description: Mahasarakham International Journal of Engineering Technology, 7, 1, 6-15
Signatures of the transition from galactic to extragalactic cosmic rays
Creators: name: Aloisio, R.
name: Berezinsky, V.
name: Blasi, P.
name: Ostapchenko, S.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We discuss the signatures of the transition from galactic to extragalactic cosmic rays in different scenarios, giving most attention to the dip scenario. The dip is a feature in the diffuse spectrum of ultra-high energy (UHE) protons in the energy range $1\times 10^{18} - 4\times 10^{19}$ eV, which is caused by electron-positron pair production on the cosmic microwave background (CMB) radiation. The dip scenario provides a simple physical description of the transition from galactic to extragalactic cosmic rays. Here we summarize the signatures of the pair production dip model for the transition, most notably the spectrum, the anisotropy and the chemical composition. The main focus of our work is however on the description of the features that arise in the elongation rate and in the distribution of the depths of shower maximum $X_{\rm max}$ in the dip scenario. We find that the curve for $X_{\max}(E)$ shows a sharp increase with energy, which reflects a sharp transition from an iron dominated flux at low energies to a proton dominated flux at $E\sim 10^{18}$ eV. We also discuss in detail the shape of the $X_{\max}$ distributions for cosmic rays of given energy and demonstrate that this represents a powerful tool to discriminate between the dip scenario and other possible models of the transition.
description: Version accepted for publication in Physical Review D
Ensemble Learning, Prediction and Li-Ion Cell Charging Cycle Divergence
Creators: James Obert
Rodrigo D. Trevizan
Loraine Torres-Castro
and Yuliya Preger
Publisher: name: IEEE
Year: 2021

In this paper, computationally efficient and accurate ensemble learning algorithms capable of detecting Li-ion cell charging irregularities are described.
In recent years, the pervasive use of lithium ion (Li-ion) batteries in applications such as cell phones, laptop computers, electric vehicles, and grid energy storage systems has prompted the development of specialized battery management systems (BMS). The primary goal of a BMS is to maintain a reliable and safe battery power source while maximizing the calendar life and performance of the cells. To maintain safe operation, a BMS should be programmed to minimize degradation and prevent damage to a Li-ion cell, which can lead to thermal runaway. Cell damage can occur over time if a BMS is not properly configured to avoid overcharging and discharging. To prevent cell damage, efficient and accurate cell charging cycle characteristics algorithms must be employed. In this paper, computationally efficient and accurate ensemble learning algorithms capable of detecting Li-ion cell charging irregularities are described. Additionally, it is shown using machine and deep learning that it is possible to accurately and efficiently detect when a cell has experienced thermal and electrical stress due to cell overcharging by measuring charging cycle divergence.
Testing the equivalence principle and discreteness of spacetime through the $t^3$ gravitational phase with quantum information technology
Creators: name: Tamburini, Fabrizio
name: Licata, Ignazio
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We propose a new thought experiment, based on present-day Quantum Information Technologies, to measure quantum gravitational effects through the Bose-Marletto-Vedral (BMV) effect by revealing the gravitational $t^3$ phase term, its expected relationships with low-energy quantum gravity phenomena and test the equivalence principle of general relativity. The technique here proposed promise to reveal gravitational field fluctuations from the analysis of the stochastic noise associated to an ideal output of a measurement process of a quantum system. To improve the sensitivity we propose to cumulate the effects of the gravitational field fluctuations in time on the outputs of a series of independent measurements acted on entangled states of particles, like in the building of a quantum cryptographic key, and extract from the associated time series the effect of the expected gravitational field fluctuations. In fact, an ideal quantum cryptographic key, built with the sharing of maximally entangled states of particles, is represented by a random sequence of uncorrelated symbols mathematically described by a perfect white noise, a stochastic process with zero mean and without correlation between its values taken at different times. Gravitational field perturbations, including quantum gravity fluctuations and gravitational waves, introduce additional phase terms that decohere the entangled pairs used to build the quantum cryptographic key, with the result of coloring the white noise. We find that this setup, built with massive mesoscopic particles, can potentially reveal the $t^3$ gravitational phase term and thus, the BMV effect.
description: 9 pages 1 figure. arXiv admin note: substantial text overlap with arXiv:0910.2322
Bose-Einstein condensates with attractive 1/r interaction: The case of self-trapping
Creators: name: Papadopoulos, I.
name: Wagner, P.
name: Wunner, G.
name: Main, J.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Amplifying on a proposal by O'Dell et al. for the realization of Bose-Einstein condensates of neutral atoms with attractive $1/r$ interaction, we point out that the instance of self-trapping of the condensate, without external trap potential, is physically best understood by introducing appropriate "atomic" units. This reveals a remarkable scaling property: the physics of the condensate depends only on the two parameters $N^2 a/a_u$ and $γ/N^2$, where $N$ is the particle number, $a$ the scattering length, $a_u$ the "Bohr" radius and $γ$ the trap frequency in atomic units. We calculate accurate numerical results for self-trapping wave functions and potentials, for energies, sizes and peak densities, and compare with previous variational results. As a novel feature we point out the existence of a second solution of the extended Gross-Pitaevskii equation for negative scattering lengths, with and without trapping potential, which is born together with the ground state in a tangent bifurcation. This indicates the existence of an unstable collectively excited state of the condensate for negative scattering lengths.
description: 7 pages, 7 figures, to appear in Phys. Rev. A
BTS PULSE Day 1 - ATSC 3 Single Frequency Networks and Virtualization Handout
Creators: S. Merrill Weiss
Merrill Weiss Group LLC - Benoît Bui Do
Enensys - Mark Corl
Triveni Digital - Ali Dernaika
HewlettPackard Enterprise
Publisher: name: IEEE
Year: 2021

IEEE BTS PULSE
Possibility of Detecting Moons of Pulsar Planets Through Time-of-Arrival Analysis
Creators: name: Lewis, Karen M.
name: Sackett, Penny D.
name: Mardling, Rosemary A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The perturbation caused by planet-moon binarity on the time-of-arrival signal of a pulsar with an orbiting planet is derived for the case in which the orbits of the moon and the planet-moon barycenter are both circular and coplanar. The signal consists of two sinusoids with frequency (2n_p - 3n_b) and (2n_p - n_b ), where n_p and n_b are the mean motions of the planet and moon around their barycenter, and the planet-moon system around the host, respectively. The amplitude of the signal is equal to the fraction sin I[9(M_p M_m)/16(M_p + M_m)^2] [r/R]^5 of the system crossing time R/c, where M_p and M_m are the the masses of the planet and moon, r is their orbital separation, R is the distance between the host pulsar and planet-moon barycenter, I is the inclination of the orbital plane of the planet, and c is the speed of light. The analysis is applied to the case of PSR B1620-26 b, a pulsar planet, to constrain the orbital separation and mass of any possible moons. We find that a stable moon orbiting this pulsar planet could be detected, if the moon had a separation of about one fiftieth of that of the orbit of the planet around the pulsar, and a mass ratio to the planet of ~5% or larger.
description: 11 pages, 3 figures
Observation of opto-mechanical multistability in a high Q torsion balance oscillator
Creators: name: Mueller, F.
name: Heugel, S.
name: Wang, L. J.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We observe the opto-mechanical multistability of a macroscopic torsion balance oscillator. The torsion oscillator forms the moving mirror of a hemi-spherical laser light cavity. When a laser beam is coupled into this cavity, the radiation pressure force of the intra-cavity beam adds to the torsion wire's restoring force, forming an opto-mechanical potential. In the absence of optical damping, up to 23 stable trapping regions were observed due to local light potential minima over a range of 4 micrometer oscillator displacement. Each of these trapping positions exhibits optical spring properties. Hysteresis behavior between neighboring trapping positions is also observed. We discuss the prospect of observing opto-mechanical stochastic resonance, aiming at enhancing the signal-to-noise ratio (SNR) in gravity experiments.
description: 4 pages, 5 figures
Trace Element Analysis of Potassium by Resonance Ionization Mass Spectrometry
Creators: name: Iwata, Yoshihiro
name: Inoue, Yoshizumi
name: Minowa, Makoto
Publisher: name: arXiv
Year: 2008
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: A simple resonance ionization mass spectrometer is built with a Quadrupole Mass Spectrometer (QMS) and two laser diodes aiming at trace analysis of potassium. The overall detection efficiency is estimated comparing the yields of resonance ionization and electron-impact ionization in the same QMS. A clear discrimination of $^{39}\rm K$, $^{40}\rm K$ and $^{41}\rm K$ is demonstrated with a help of isotope shifts of the atomic levels.
description: 14 pages, 9 figures, submitted to JJAP
Utilizzo di attività “ponte” online su Moodle in un laboratorio universitario di Intercomprensione fra lingue romanze: dal reale al virtuale e ritorno
Creators: name: Celentin, Paola
name: Benavente Ferrera, Susana
Publisher: name: Università degli Studi di ferrara
Year: 2019

description: Abstract – During the workshop on intercomprehension between Romance languages, which started in the academic year 2017/2018 at the Linguistic Center of the University of Verona, a Moodle application was used to integrate this with face-to-face teaching. The ways in which online work was combined with face-to- face work led us to coin the phrase “bridge activity”, which will be illustrated in the article. In our opinion, it was not simply a question of “mixed” learning (blended learning) but rather “integrated” learning, given the continuous circle between the virtual and the real which blurred the boundaries between the two. The experience has driven us to deepening the effective technological literacy of university students and the need to reaffirm, in this context, the importance of the learning community.

Riassunto – Durante il laboratorio di intercomprensione fra lingue romanze avviato a partire dall’a.a. 2017/2018 presso il Centro Linguistico d’Ateneo dell’Università di Verona è stata utilizzata un’istanza Moodle per integrare la didattica in presenza. Le modalità con cui il lavoro online è stato congiunto al lavoro in presenza ci ha portate a coniare l’espressione “attività ponte”, che verrà illustrata nel corso dell’articolo. A nostro avviso non si è infatti semplicemente trattato di apprendimento misto (blended learning) ma piuttosto di apprendimento integrato (integrated learning), data la continua circolarità fra virtuale e reale che ha fatto sfumare i confini tra i due. L’esperienza ci ha condotte ad approfondire l’effettiva alfabetizzazione tecnologica degli studenti universitari e il bisogno di riaffermare, in questo contesto, l’importanza della comunità di apprendimento.

Keywords – Moodle, learning community, intercomprehension, university, laboratory teaching

Parole chiave – Moodle, comunità di apprendimento, intercomprensione, università, didattica laboratoriale
description: Annali online della Didattica e della Formazione Docente, Vol 11, N° 17 (2019): "ognuno resti com'è, diverso dagli altri". Plurilinguismo, multilinguismo, multiculturalismo
Il latino nella didattica dell’intercomprensione fra lingue romanze: percorsi possibili
Creators: name: Frisan, Erika H.
name: Sheeren, Hugues
Publisher: name: Università degli Studi di ferrara
Year: 2019

description: Abstract – From the 2017/18 academic year the Linguistic Centre of the University of Verona has activated a multilingual laboratory of intercomprehension among romance languages. The lab also offers an opportunity to share reflections on the linguistics of Greek-Latin languages. This article presents in brief the theoretical assumptions underlying this choice and illustrates some strategies and didactic activities that – by intersecting philology and ludolinguistics – have been and can be conceived as reinforcing an awareness of the linguistic similarities that characterise romance languages (and beyond).

Riassunto – Dall’anno accademico 2017/18 presso il Centro Linguistico dell’Ateneo di Verona è attivo un Laboratorio plurilingue di Intercomprensione fra lingue romanze, all’interno del quale viene contemplato uno specifico momento di riflessione linguistica dedicato alle comuni origini. In questo articolo si presentano in breve le premesse teoriche sottese a tale scelta e si vanno ad illustrare alcune strategie ed attività didattiche che – incrociando filologia e ludolinguistica – sono state e possono essere concepite per potenziare il risveglio della consapevolezza della familiarità linguistica che caratterizza le lingue romanze (e non solo).

Parole chiave – didattica del latino, lingue romanze, intercomprensione fra lingue romanze, didattica delle lingue, ludolinguistica

Keywords – didactic of latin language, romance languages, intercomprehension between romance languages, didactic of the modern languages, ludolinguistics
description: Annali online della Didattica e della Formazione Docente, Vol 11, N° 17 (2019): "ognuno resti com'è, diverso dagli altri". Plurilinguismo, multilinguismo, multiculturalismo
Fa tre anni che insegno a Barcellona. Interferenze e interlingua tra italiano, castigliano e catalano
Creators: name: Ghetti, Margherita
Publisher: name: Università degli Studi di ferrara
Year: 2019

description: Abstract – The process of learning similar languages, such as Italian, Castilian Spanish and Catalan, in a multilingual environment like the Italian School in Barcelona, entails some difficulties that arise precisely from their reciprocal similarities. The tendency to use these languages’ common elements incorrectly creates a sort of shared interlanguage that allows us to identify recurring interferences in terms of both lexicon and syntax. This paper, in the light of the analysis of the bilingual context which is characteristic of the capital of Catalonia, seeks to present the more common contaminating phenomena shared by the three Romance languages, reflecting on the pupils’ repertoire in a multilingual and multicultural perspective based on which the teaching of the Italian language starts from the linguistic and communicative skills that the students have already developed in their native language.

Riassunto – Il processo di apprendimento di lingue affini, quali l’italiano, il castigliano e il catalano, inserito in un ambiente plurilingue come quello della Scuola Italiana di Barcellona, comporta alcune difficoltà generate proprio dalle similitudini reciproche. La tendenza ad usare in modo erroneo gli elementi comuni tra i suddetti idiomi crea una sorta di interlingua condivisa che permette di individuare alcune interferenze ricorrenti sia a livello lessicale che sintattico. Il presente contributo, alla luce dell’analisi del contesto bilingue caratteristico della capitale catalana, mira a presentare i fenomeni di contaminazione più diffusi tra le tre lingue di provenienza romanza, riflettendo sul repertorio degli allievi in una prospettiva pluringue e multiculturale secondo cui la stessa didattica della lingua italiana si sviluppa a partire dalle competenze linguistiche e comunicative che gli alunni hanno già maturato o stanno maturando nell’idioma nativo.

Keywords – teaching, Italian language, linguistic interferences, playful uses of language

Parole chiave – didattica, lingua italiana, interferenze linguistiche, ludolinguistica
description: Annali online della Didattica e della Formazione Docente, Vol 11, N° 17 (2019): "ognuno resti com'è, diverso dagli altri". Plurilinguismo, multilinguismo, multiculturalismo
Anatomy of luminosity functions: the 2dFGRS example
Creators: name: Tempel, Elmo
name: Einasto, Jaan
name: Einasto, Maret
name: Saar, Enn
name: Tago, Erik
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Aims. We use the 2dF Galaxy Redshift Survey to derive the luminosity function (LF) of the first-ranked (brightest) group/cluster galaxies, the LF of second-ranked, satellite and isolated galaxies, and the LF of groups of galaxies. Methods. We investigate the LFs of different samples in various environments: in voids, filaments, superclusters and supercluster cores. We compare the derived LFs with the Schechter and double-power-law analytical expressions. We also analyze the luminosities of isolated galaxies. Results. We find strong environmental dependency of luminosity functions of all populations. The luminosities of first-ranked galaxies have a lower limit, depending on the global environment (higher in supercluster cores, and absent in voids). The LF of second-ranked galaxies in high-density regions is similar to the LF of first-ranked galaxies in a lower-density environment. The brightest isolated galaxies can be identified with first-ranked galaxies at distances where the remaining galaxies lie outside the observational window used in the survey. Conclusions. The galaxy and cluster LFs can be well approximated by a double-power-law; the widely used Schechter function does not describe well the bright end and the bend of the LFs. Properties of the LFs reflect differences in the evolution of galaxies and their groups in different environments.
description: 15 pages, 19 figures, submitted to A&A
A comparison of some robust estimates of correlations in the presence of asymmetry
Creators: name: Lind, John Charles
Publisher: name: University of British Columbia
Year: 2010

description: Three methods for obtaining robust estimates of correlation matrices were compared in conditions of asymmetrically contaminated normal distributions. The estimators examined included a multivariate trimming (MVT) procedure based on the Mahalanobis distance measure, and two procedures derived from the robust estimation of regression coefficients. The regression coefficients were obtained from the sample cumulant generating function of the residuals. Monte Carlo results were obtained for various levels of sample size and outlier contamination. Correlations obtained from the regression procedures were observed to be highly robust with respect to asymmetric contamination and were able to withstand larger amounts of outlier contamination than the MVT estimates. The MVT estimates tended to be slightly less biased than correlations obtained from the regression procedure in conditions with the smallest amounts of contamination. The use of these estimates for outlier identification is discussed.
Multiple stellar populations at less evolved stages-II: no evidence of significant helium spread among NGC 1846 dwarfs
Creators: name: Li, Chengyuan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The detection of star-to-star chemical variations in star clusters older than 2 Gyr has changed the traditional view of star clusters as canonical examples of "simple stellar populations" (SSPs) into the so-called "multiple stellar populations" (MPs). Although the significance of MPs seems to correlate with cluster total mass, it seems that the presence of MPs is determined by cluster age, however. In this article, we use deep photometry from the Hubble Space Telescope to investigate whether the FG-type dwarfs in the $\sim$1.7 Gyr-old cluster NGC 1846, have helium spread. By comparing the observation with the synthetic stellar populations, we estimate a helium spread of $Δ{Y}\sim0.01\pm0.01$ among the main-sequence stars in NGC 1846. The maximum helium spread would not exceed $Δ{Y}\sim0.02$, depending on the adopted fraction of helium-enriched stars. To mask the color variation caused by such a helium enrichment, a nitrogen enrichment of at least $Δ{\rm [N/Fe]}$=0.8 dex is required, which is excluded by previous analyses of the red-giant branch in this cluster. We find that our result is consistent with the $Δ{Y}$--mass relationship for Galactic globular clusters. To examine whether or not NGC 1846 harbors MPs, higher photometric accuracy is required. We conclude that under the adopted photometric quality, there is no extreme helium variation among NGC 1846 dwarfs.
description: 10 pages, 8 figures, AAS journal accepted
Light from the Hidden Sector
Creators: name: Ahlers, M.
name: Gies, H.
name: Jaeckel, J.
name: Redondo, J.
name: Ringwald, A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Optical precision experiments are a powerful tool to explore hidden sectors of a variety of standard-model extensions with potentially tiny couplings to photons. An important example is given by extensions involving an extra light U(1) gauge degree of freedom, so-called paraphotons, with gauge-kinetic mixing with the normal photon. These models naturally give rise to minicharged particles which can be searched for with optical experiments. In this paper, we study the effects of paraphotons in such experiments. We describe in detail the role of a magnetic field for photon-paraphoton oscillations in models with low-mass minicharged particles. In particular, we find that the upcoming light-shining-through-walls experiments are sensitive to paraphotons and can distinguish them from axion-like particles.
description: 34 pages, 9 figures
Kinetics and photocontrol of hypocotyl elongation in etiolated mustard (Sinapis alba L.)
Creators: name: Kristie, David Nickolos
Publisher: name: University of British Columbia
Year: 2010

description: The kinetics of hypocotyl elongation in darkness, and the responses of elongation to brief and prolonged irradiations were investigated in white mustard ( Sinapis alba L.) seedlings and in other species. A growth measuring apparatus consisting of a linear displacement tranducer coupled to a signal differentiator was developed to provide continuous high resolution measurements of the rate of hypocotyl elongation. In darkness, the growth rate of Sinapis as well as other species often underwent sustained and highly regular oscillations with a period of 3-30 minutes. A long period oscillation (>50 min) generated by nutational bending was also observed in the growth rate traces of many seedlings. The effects of monochromatic light were tested at a number of wavelengths between 380 and 780 nm waveband. Based on differences in the kinetics and spectral dependence of the responses to light, five distinct types of photoresponses could be distinguished in Sinapis. (1) Brief or prolonged irradiations with 380-500 nm light inhibited elongation after a lag of ca. 1 minute. (2) Phototropic bending was induced by low fluence rates of blue light, which did not cause a rapid inhibition of growth, indicating that these two photoresponses were distinct. (3) Brief 550-710 nm light pulses caused a 40-50% inhibition of growth after about a 5 minute lag. (4) Prolonged 660-710 nm irradiations caused a fluence rate-dependent inhibition, with kinetics distinct from the effects of brief light pulses. (5) Brief or prolonged irradiations with 720-780 nm light caused a small transient inhibition following the irradiation, or had no effect. The inhibitory effects of brief or prolonged irradiations with red or far red light were rapidly reversed by a longwave far red light pulse. The inhibitory effects of 710 nm light were lost after a red light pretreatment. It was concluded that the rapid effects of UV-blue light were mediated by a photoreceptor distinct from phytochrome. Hypocotyl elongation was also, rapidly and reversibly controlled by a phytochrome threshold reaction, with a threshold level of ca. 5% Pfr required for inhibition. The phytochrome threshold reaction was a prerequisite to the response to continuous irradiations.
Prima della scuola: spunti per impostare nuovi percorsi scolastici in un’epoca di alta mobilità individuale
Creators: name: Iannàccaro, Gabriele
Publisher: name: Università degli Studi di ferrara
Year: 2019

description: Abstract – The paper discusses the linguistic concerns of people in mobility in order to set out a better education policy that can take into account the real conditions in which the communication processes take place. Data and suggestion come from a large survey in Europe, fp7 European project MIME (Mobility and Integration in a Multilingual Europe). With the aid of an interpretive framework, different typologies of mobility are provided, to indicate the real needs of mobile people and the – desired or unwanted  – outcomes that can be hence previewed.

Riassunto – L’articolo discute le reali condizioni linguistiche delle persone in mobilità, al fine aiutare a definire più avanzate politiche educative che possano tener conto della effettiva complessità che caratterizza i processi di comunicazione. Dati e suggerimenti provengono da un’ampia indagine in Europa, il progetto europeo 7 MIME (Mobilità e integrazione in un’Europa multilingue). Attraverso l’analisi un framework interpretativo ai mostrano diverse tipologie di mobilità utili a inquadrare i reali bisogni linguistici delle persone e i risultati, desiderati o indesiderati, che possono essere previsti.

Keywords – sociolinguistic, linguistic education, linguistic unease, linguistic complexity, mobility

Parole chiave –  sociolinguistica, educazione linguistica, disagio linguistico, complessità linguistica, mobilità
description: Annali online della Didattica e della Formazione Docente, Vol 11, N° 17 (2019): "ognuno resti com'è, diverso dagli altri". Plurilinguismo, multilinguismo, multiculturalismo
Linguistica romanza e intercomprensione: una risorsa didattica per il multilinguismo e il plurilinguismo in Europa
Creators: name: Jamet, Marie-Christine
name: Negri, Antonella
Publisher: name: Università degli Studi di ferrara
Year: 2019

description: Abstract – For decades, European policy has valorized principles of multilingualism and plurilingualism. In practice, however, policies tend to focus on valuing languages that are helpful for economic competitiveness and for attracting foreign students. Instead, a language policy that considers the academic training reality of learning a language and not simply the professional outcomes for the student – in view of the concrete multicultural academic reality in which a student will then act as a professor – should invest in a more holistic approach. Such an approach should take into accounts the socio-cultural norms necessary to understand the hybrid nature of European languages from their inception and identify the multicultural evolution that led to their current configuration. Romance Linguisitics and Intercomprehension address this need. Together the two discipline can constitute a helpful resource for pedagogical approaches at the universitiy, which would allow students to study the history of romance languages through romance languages.

Riassunto – La politica europea da decenni si mostra generosa nel valorizzare, in via di principio, multilinguismo e plurilinguismo. Tuttavia, sul piano pratico tale valorizzazione si concentra nel sostegno alle lingue utili per la competitività economica, o per l’attrazione degli studenti stranieri. Invece, una politica linguistica che pensi anche alla formazione, e non solo alla professionalizzazione dello studente, in vista della concreta realtà scolastica multiculturale nella quale si troverà ad operare come insegnante, dovrebbe investire in una direzione più complessiva, che tenga conto di categorie storico-culturali, utili a comprendere l’ibridazione dell’Europa linguistica a partire dai suoi albori e a individuare quegli apporti multiculturali che ne hanno reso possibile l’attuale configurazione. A questi obiettivi rispondono la linguistica romanza (LR) e l’intercomprensione (IC) che insieme possono costituire un’utile risorsa sul piano della didattica in un ambito universitario consono all’apprendimento della storia delle lingue romanze, tramite le lingue romanze stesse.

Keywords – Europe, intercomprehension, Romance linguistics, multilingualism, plurilingualism, CLIL

Parole chiave – Europa, intercomprensione, linguistica romanza, multilinguismo, plurilinguismo, CLIL
description: Annali online della Didattica e della Formazione Docente, Vol 11, N° 17 (2019): "ognuno resti com'è, diverso dagli altri". Plurilinguismo, multilinguismo, multiculturalismo
Coherent manipulation of nuclear spins in the breakdown regime of integer quantum Hall states
Creators: name: Kawamura, Minoru
name: Takahashi, Hiroyuki
name: Hashimoto, Yoshiaki
name: Katsumoto, Shingo
name: Machida, Tomoki
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We demonstrate a new method for electrical manipulation of nuclear spins utilizing dynamic nuclear polarization induced by quantum Hall effect breakdown. Nuclear spins are polarized and detected through the hyperfine interaction between a nuclear spin system and a two-dimensional electron system located at an interface of GaAs/AlGaAs single heterostructure. Coherent oscillations between the nuclear-spin quantum states are observed by measuring the longitudinal voltage of the conductor.
description: 4 pages, 2 figures
Creating and using large grids of pre-calculated model atmospheres for rapid analysis of stellar spectra
Creators: name: Zsargó, Janos
name: Fierro-Santillán, Celia Rosa
name: Klapp, Jaime
name: Arrieta, Anabel
name: Arias, Lorena
name: Valencia, Jurij Mendoza
name: Sigalotti, Leonardo Di G.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present a database of 45,000 atmospheric models (which will become 80,000 models by the end of the project) with stellar masses between 9 and 120 M$_{\odot}$, covering the region of the OB main sequence and W-R stars in the H-R diagram. The models were calculated using the ABACUS I supercomputer and the stellar atmosphere code CMFGEN. The parameter space has 6 dimensions: the effective temperature $T_{\rm eff}$, the luminosity $L$, the metallicity $Z$, and three stellar wind parameters, namely the exponent $β$, the terminal velocity $V_{\infty}$, and the volume filling factor $F_{cl}$. For each model, we also calculate synthetic spectra in the UV (900-2000 Angstroms), optical (3500-7000 Angstroms), and near IR (10000-30000 Angstroms) regions. To facilitate comparison with observations, the synthetic spectra were rotationally broaden using ROTIN3, by covering $v$ sin $i$ velocities between 10 and 350 km/s with steps of 10 km/s, resulting in a library of 1 575 000 synthetic spectra. In order to demonstrate the benefits of employing the databases of pre-calculated models, we also present the results of the re-analysis of $ε$ Ori by using our grid.
description: 11 pages, 6 figures. arXiv admin note: substantial text overlap with arXiv:2009.10879
L’intercompréhension, rempart contre la glottophobie
Creators: name: Sheeren, Hugues
Publisher: name: Università degli Studi di ferrara
Year: 2019

description: Abstract – Because it favors diversity and multilingualism, intercomprehension is an approach that invites its followers to discover differences and adapt their opinion on the universe, languages spoken elsewhere and other people. Since it is a communication means that is fair, of an equal level, and respectful of interlocutors, it opposes racism and “glottophobia” while emphasizing minority languages, dialects and idioms that have been little institutionalized all this without creating a hierarchy between them. It is a profound humanistic approach that favors tolerance between human beings and is moreover profitable in terms of the energy that needs to be invested, meaning it is also environmentally friendly.

Riassunto – Valorizzando la varietà e il plurilinguismo, l’intercomprensione si presenta come un approccio che apre le persone che la praticano alla diversità, modificando il loro sguardo sul mondo e sulle diverse lingue che vi sono parlate da altri essere umani. Dato che si pone come un modo di comunicazione solidale, paritario, rispettoso dell’interlocutore/trice, si presenta come un deterrente al razzismo e alla “glottofobia” per il fatto che mette in risalto lingue minoritarie, dialetti e idiomi poco istituzionalizzati senza stabilire alcuna gerarchia fra di loro. Un approccio profondamente umanistico, che risulta al contempo pragmaticamente vantaggioso in termini di energie da investire, il che lo rende anche “ecologico”.

Keywords – latin language, intercomprehension between roman languages, didactic of the modern languages, glottophobia

Parole chiave – intercomprensione fra lingue romanze, didattica delle lingue, glottofobia, plurilinguismo
description: Annali online della Didattica e della Formazione Docente, Vol 11, N° 17 (2019): "ognuno resti com'è, diverso dagli altri". Plurilinguismo, multilinguismo, multiculturalismo
A cut-and-fold self-sustained compliant oscillator for autonomous actuation of origami-inspired robots
Creators: name: Yan, Wenzhong
name: Mehta, Ankur
Publisher: name: arXiv
Year: 2021
Subjects: subject: Robotics (cs.RO)
subject: Applied Physics (physics.app-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: Origami-inspired robots are of particular interest given their potential for rapid and accessible design and fabrication of elegant designs and complex functionalities through cutting and folding of flexible 2D sheets or even strings, i.e.printable manufacturing. Yet, origami robots still require bulky, rigid components or electronics for actuation and control to accomplish tasks with reliability, programmability, ability to output substantial force, and durability, restricting their full potential. Here, we present a printable self-sustained compliant oscillator that generates periodic actuation using only constant electrical power, without discrete components or electronic control hardware. This oscillator is robust (9 out of 10 prototypes worked successfully on the first try), configurable (with tunable periods from 3 s to 12 s), powerful (can overcome hydrodynamic resistance to consistently propel a swimmer at ~1.6 body lengths/min), and long-lasting (~10^3 cycles); it enables driving macroscale devices with prescribed autonomous behaviors, e.g. locomotion and sequencing. This oscillator is also fully functional underwater and in high magnetic fields. Our analytical model characterizes essential parameters of the oscillation period, enabling programmable design of the oscillator. The printable oscillator can be integrated into origami-inspired systems seamlessly and monolithically, allowing rapid design and prototyping; the resulting integrated devices are lightweight, low-cost, compliant, electronic-free, and nonmagnetic, enabling practical applications in extreme areas. We demonstrate the functionalities of the oscillator with: (i) autonomous gliding of a printable swimmer, (ii) LED flashing, and (iii) fluid stirring. This work paves the way for realizing fully printable autonomous robots with a high integration of actuation and control.
description: 23 pages, 5 figures. This manuscript has been accepted for publication in Soft Robotics. Supplementary texts, movies, and figures are not uploaded
La "silhouette des langues": dessiner et représenter les identités plurielles
Creators: name: Manconi, Thérèse
Publisher: name: Università degli Studi di ferrara
Year: 2019

description: Abstract – The “Silhouette des Langues” workshop offers an opportunity to reflect on representations of linguistic repositories in order to produce a personal ‘linguistic repository’. Taking as a starting point: the inherent complexity and the recognition of multilingualism (Castellotti: 2010); the educational value of learners’ storytelling (Perregaux: 2002); the effect on the learning of a foreign language of the ‘word’ learners draw from the ‘ritual’ procedures of classroom interaction (Moore and Simon: 2002), we employ the methods applied both during our teaching activities (University of Pavia and University of Insubria) and our lessons to teachers of foreign languages. At the same time, this ‘silhouette’ allows us entry into the ‘body’ of the range of individual language repositories and to recount the processes of contact (learning); teaching with the foreign languages that make up these repositories as well as the languages themselves.

Riassunto – Il laboratorio sulla “silhouette des langues” propone una riflessione sulle rappresentazioni dei repertori linguistici, per giungere alla stesura della propria “auto-biografia linguistica”. Partendo da: la complessità inerente il riconoscimento del plurilinguismo (Castellotti: 2010); la valenza didattica delle narrazioni da parte dei discenti (Perregaux: 2002); l’incidenza, sull’apprendimento di una lingua straniera, della “parola” che il discente sottrae al processo “rituale” delle interazioni nelle classi (Moore e Simon: 2002), si ricorre a tale strumento, già sperimentato nell’ambito della nostra attività didattica (Università di Pavia e Università dell’Insubria) e nei nostri corsi di formazione di docenti di Lingue straniere. Tale “silhouette” consente, al contempo, una iscrizione nel “corpo” della varietà dei repertori linguistici individuali e un narrare i processi di contatto – apprendimento – insegnamento “con” e “delle” lingue straniere che compongono tali repertori.

Keywords – linguistic autobiography storytelling, plural identities, representations, linguistic repositories

Parole chiave – auto-biografia linguistica, narrazioni, identità plurali, rappresentazioni, repertori linguistici
description: Annali online della Didattica e della Formazione Docente, Vol 11, N° 17 (2019): "ognuno resti com'è, diverso dagli altri". Plurilinguismo, multilinguismo, multiculturalismo
Excitation of K-shell electrons by electron impact
Creators: name: Nefiodov, A. V.
name: Plunien, G.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: The universal scaling behavior for the electron-impact excitation cross sections of the $2s$ states of hydrogen- and helium-like multicharged ions is deduced. The study is performed within the framework of non-relativistic perturbation theory, taking into account the one-photon exchange diagrams. Special emphasis is laid on the near-threshold energy domain. The parametrical relationship between the cross sections for excitation of multicharged ions with different number of electrons is established.
description: to be published in Physics Letters A
Augmenting Slot Values and Contexts for Spoken Language Understanding with Pretrained Models
Creators: name: Lin, Haitao
name: Xiang, Lu
name: Zhou, Yu
name: Zhang, Jiajun
name: Zong, Chengqing
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computation and Language (cs.CL)
subject: FOS: Computer and information sciences

description: Spoken Language Understanding (SLU) is one essential step in building a dialogue system. Due to the expensive cost of obtaining the labeled data, SLU suffers from the data scarcity problem. Therefore, in this paper, we focus on data augmentation for slot filling task in SLU. To achieve that, we aim at generating more diverse data based on existing data. Specifically, we try to exploit the latent language knowledge from pretrained language models by finetuning them. We propose two strategies for finetuning process: value-based and context-based augmentation. Experimental results on two public SLU datasets have shown that compared with existing data augmentation methods, our proposed method can generate more diverse sentences and significantly improve the performance on SLU.
description: Accepted by Interspeech2021