cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Quantum Nanophotonics in Two-Dimensional Materials
Creators: name: Reserbat-Plantey, Antoine
name: Epstein, Itai
name: Torre, Iacopo
name: Costa, Antonio T.
name: Gonçalves, P. A. D.
name: Mortensen, N. Asger
name: Polini, Marco
name: Song, Justin C. W.
name: Peres, Nuno M. R.
name: Koppens, Frank H. L.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optics (physics.optics)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The field of 2D materials-based nanophotonics has been growing at a rapid pace, triggered by the ability to design nanophotonic systems with in situ control, unprecedented degrees of freedom, and to build material heterostructures from bottom up with atomic precision. A wide palette of polaritonic classes have been identified, comprising ultra confined optical fields, even approaching characteristic length scales of a single atom. These advances have been a real boost for the emerging field of quantum nanophotonics, where the quantum mechanical nature of the electrons and-or polaritons and their interactions become relevant. Examples include, quantum nonlocal effects, ultrastrong light matter interactions, Cherenkov radiation, access to forbidden transitions, hydrodynamic effects, single plasmon nonlinearities, polaritonic quantization, topological effects etc. In addition to these intrinsic quantum nanophotonic phenomena, the 2D material system can also be used as a sensitive probe for the quantum properties of the material that carries the nanophotonics modes, or quantum materials in its vicinity. Here, polaritons act as a probe for otherwise invisible excitations, e.g. in superconductors, or as a new tool to monitor the existence of Berry curvature in topological materials and superlattice effects in twisted 2D materials.
description: 27 pages, 7 figures
Time-frequency Domain Analogues of Phase Space Sub-Planck Structures
Creators: name: Praxmeyer, Ludmila
name: Wasylczyk, Piotr
name: Radzewicz, Czeslaw
name: Wodkiewicz, Krzysztof
Publisher: name: arXiv
Year: 2006
Subjects: subject: Optics (physics.optics)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We present experimental data of the frequency resolved optical gating (FROG) measurements of light pulses revealing interference features corresponding to sub-Planck structures in phase space. For superpositions of pulses a small, sub-Fourier shift in the carrier frequency leads to a state orthogonal to the initial one, although in the representation of standard time-frequency distributions these states seem to have a nonvanishing overlap.
description: New title, minor changes
Quantum billiards with correlated electrons confined in triangular transition metal dichalcogenide monolayer nanostructures created by laser quench
Creators: name: Ravnik, Jan
name: Vaskivskyi, Yevhenii
name: Vodeb, Jaka
name: Aupič, Polona
name: Vaskivskyi, Igor
name: Golež, Denis
name: Gerasimenko, Yaroslav
name: Kabanov, Viktor
name: Mihailovic, Dragan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Forcing systems though fast non-equilibrium phase transitions offers the opportunity to study new states of quantum matter that self-assemble in their wake. Here we study the quantum interference effects of correlated electrons confined in monolayer quantum nanostructures, created by femtosecond laser-induced quench through a first-order polytype structural transition in a layered transition-metal dichalcogenide material. Scanning tunnelling microscopy of the electrons confined within equilateral triangles, whose dimensions are a few crystal unit cells on the side, reveals that the trajectories are strongly modified from free-electron states both by electronic correlations and confinement. Comparison of experiments with theoretical predictions of strongly correlated electron behaviour reveals that the confining geometry destabilizes the Wigner/Mott crystal ground state, resulting in mixed itinerant and correlation-localized states intertwined on a length scale of 1 nm. Occasionally, itinerant-electron states appear to follow quantum interferences which are suggestive of classical trajectories (quantum scars). The work opens the path toward understanding the quantum transport of electrons confined in atomic-scale monolayer structures based on correlated-electron-materials.
Dörnyei, Z.; Kubanyiova, M. (2014). Motivating Learners, Motivating Teachers: Building vision in the language classroom. Cambridge (UK): Cambridge University Press
Creators: name: Bier, Ada
Publisher: name: Università Ca’ Foscari Venezia, Italia
Year: 2015

description:

description: EL.LE
Biblioteca Italiana dell’Educazione Linguistica - BELI
Creators: name: Balboni, Paolo
Publisher: name: Università Ca’ Foscari Venezia, Italia
Year: 2015

description: The complete bibliography, from 1960 to nowadays, can be found in the websites of the Research Centre on Language Education of Ca' Foscari University (www.unive.it/crdl), of the Laboratorio Itals (www.itals.it) and of Società Italiana di Didattica delle Lingue e Linguistica Educativa (www.dille.it). BELI is a work in progress, it is based on the collaboration of Italian scholars and all experts can suggest integrations or corrections. This is the 2014 bibliography
description: EL.LE
Kuitche Tale, G. (2014). Plurilinguismo e didattica dell’italiano L2 nell’Africa sub-sahariana francofona. Aprilia: Novalogos
Creators: name: Mazoua Megni Tchio, Vicky
Publisher: name: Università Ca’ Foscari Venezia, Italia
Year: 2015

description:

description: EL.LE
Έλεγχος ψυχομετρικών ιδιοτήτων μιας νέας εκδοχής της Δοκιμασίας Οπτικο-νοητικής Ιχνηλάτησης
Creators: name: Μπουσλέλη, Ευστρατία Παναγιώτη
Publisher: name: Aristotle University of Thessaloniki
Year: 2019
Subjects: Εκτελεστικές Λειτουργίες
Νευροψυχολογική Δοκιμασία
Δοκιμασία Οπτικό-νοητικής Ιχνηλάτησης
Executive Functions,
Neuropsychological Test
Visual-Cognitive Trail Making Test

description: Η Δοκιμασία Οπτικο-νοητική Ιχνηλάτηση (ΔΟΝΙ) αποτελεί ένα αυτόνομο εργαλείο νευροψυχολογικής αξιολόγησης που λειτουργεί ως δείκτης της γνωστικής διαδικασίας και της εκτελεστικής λειτουργικότητας και βρίσκει εφαρμογές τόσο σε υγιείς όσο και σε κλινικούς πληθυσμούς. Σκοπός της έρευνας ήταν να συλλέξουμε δεδομένα της επίδοσης του ελληνικού πληθυσμού και να μελετήσουμε τις ψυχομετρικές ιδιότητες μιας νέας εκδοχής της Δοκιμασίας Οπτικο-νοητικής Ιχνηλάτησης. Στην έρευνα συμμετείχαν ογδόντα εννέα ενήλικα υγιή άτομα με πανεπιστημιακής εκπαίδευσης τα οποία χωρίσαμε σε δύο ομάδες. Τα εργαλεία που χορηγήθηκαν μαζί με τη ΔΟΝΙ ήταν η Δοκιμασία Παρεμβολής Χρωματος-Λέξης (ΔΠΧΛ) του D-KEFS και το ερωτηματολόγιο των Γνωστικών Αποτυχιών. Η ανάλυση κύριων συνιστωσών έδειξε ότι και οι πέντε συνθήκες της Δοκιμασίας Οπτικο-νοητικής Ιχνηλάτησης φορτίζουν στον ίδιο παράγοντα και το ίδιο ισχύει και για τις δύο ηλικιακές ομάδες. Αυξημένο ποσοστό σφάλματος παρατηρήθηκε μόνο στη Συνθήκη τέσσερα Εναλλαγή Αριθμού-Γράμματος. Δε βρέθηκε συσχέτιση μεταξύ των λαθών στη Συνθήκη τέσσερα της Δοκιμασίας Οπτικο-νοητικής Ιχνηλάτησης και στις Συνθήκες τρία και τέσσερα της Δοκιμασίας Παρεμβολής Χρωματος-Λέξη. Συμπερασματικά η Δοκιμασία Οπτικο-νοητικής Ιχνηλάτησης αποτελεί μια ενιαία μέτρηση που σα σύνολο φορτίζει στον παράγοντα της Ακολουθίας καθιστώντας το ως μια αυτόνομη και ολοκληρωμένη συστοιχία
description: The Visual-Cognitive Trail Making Test is a standalone neuropsychological assessment tool that acts as an indicator of cognitive process and executive functioning and finds applications in both healthy and clinical populations. The purpose of the research was to collect data on the performance of the Greek population and test the psychometric properties of a new version of the Visual-Cognitive Trail Making Test. The study involved eighty nine healthy adults of university education divided into two groups. The tools administered with the Visual-Cognitive Trail Making Test were the D-KEFS Color-Word Interference Test and the Cognitive Failure Questionnaire. Factor analysis showed that all five conditions of the Visual-Cognitive Trail Making Test load on the same factor and the same applies to both age groups. An increased error rate was observed only in Condition four Number- Letter Switching. No correlation was found between errors in Condition four of the Visual-Cognitive Trail Making Test and Conditions three and four of the Color-Word Interference Test. In conclusion, the Visual-Cognitive Trail Making Test is a single measurement that charges itself to the Sequence factor making it an autonomous and integrated array
Molecular jets driven by high-mass protostars: a detailed study of the IRAS 20126+4104 jet
Creators: name: Garatti, A. Caratti o
name: Froebrich, D.
name: Eisloeffel, J.
name: Giannini, T.
name: Nisini, B.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present here an extensive analysis of the protostellar jet driven by IRAS 20126+4104, deriving the kinematical, dynamical, and physical conditions of the H2 gas along the flow. The jet has been investigated by means of near-IR H2 and [FeII] narrow-band imaging, high resolution spectroscopy of the 1-0S(1) line (2.12 um), NIR (0.9-2.5 um) low resolution spectroscopy, along with ISO-SWS and LWS spectra (from 2.4 to 200 um). The flow shows a complex morphology. In addition to the large-scale jet precession presented in previous studies, we detect a small-scale wiggling close to the source, that may indicate the presence of a multiple system. The peak radial velocities of the H2 knots range from -42 to -14 km s^-1 in the blue lobe, and from -8 to 47 km s^-1 in the red lobe. The low resolution spectra are rich in H_2 emission, and relatively faint [FeII] (NIR), [OI] and [CII] (FIR) emission is observed in the region close to the source. A warm H2 gas component has an average excitation temperature that ranges between 2000 K and 2500 K. Additionally, the ISO-SWS spectrum reveals the presence of a cold component (520 K), that strongly contributes to the radiative cooling of the flow and plays a major role in the dynamics of the flow. The estimated L(H2) of the jet is 8.2+/-0.7 L_sun, suggesting that IRAS20126+4104 has an accretion rate significantly increased compared to low-mass YSOs. This is also supported by the derived mass flux rate from the H2 lines (Mflux(H2)~7.5x10^-4 M_sun yr^-1). The comparison between the H2 and the outflow parameters strongly indicates that the jet is driving, at least partially, the outflow. As already found for low-mass protostellar jets, the measured H2 outflow luminosity is tightly related to the source bolometric luminosity.
description: 16 pages, 12 figures. A&A accepted
Dislocation-mediated plasticity in the Al$_{2}$Cu θ-phase
Creators: name: Andre, D.
name: Xie, Z.
name: Ott, F.
name: Pürstl, J. T.
name: Lohrey, N.
name: Clegg, W. J.
name: Sandlöbes-Haut, S.
name: Korte-Kerzel, S.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The deformation behaviour of the intermetallic Al$_{2}$Cu-phase was investigated using atomistic simulations and micropillar compression, where slip on the unexpected {211} and {022} slip planes was revealed. Additionally, all possible slip systems for the intermetallic phases were further evaluated and a preference for the activation of slip systems based on their effective interplanar distances as well as the effective Burgers vector is proposed. The effective interplanar distance corresponds to the manually determined interplanar distance, whereas the effective Burgers vector takes a potential dislocation dissociation into account. This new order is: {211}1/2<111>, {022}1/2<111> and {022}<100>, {110}<001>, {310}<001>, {022}<011>, {110}1/2<111>, {112}<110> and {112}1/2<111> from high to low ratio of deff/beff. Also, data on the critical resolved shear stresses of several of these slip systems were measured.
description: 27 pages, 17 figures
Quantum and classical ergotropy from relative entropies
Creators: name: Sone, Akira
name: Deffner, Sebastian
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The quantum ergotropy quantifies the maximal amount of work that can be extracted from a quantum state without changing its entropy. Given that the ergotropy can be expressed as the difference of quantum and classical relative entropies of the quantum state with respect to the thermal state, we define the classical ergotropy, which quantifies how much work can be extracted from distributions that are inhomogeneous on the energy surfaces. A unified approach to treat both quantum as well as classical scenarios is provided by geometric quantum mechanics, for which we define the geometric relative entropy. The analysis is concluded with an application of the conceptual insight to conditional thermal states, and the correspondingly tightened maximum work theorem.
description: v4: close to the published version
Determining the phonon DOS from specific heat measurements via maximum entropy methods
Creators: name: Hague, J. P.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The maximum entropy and reverse Monte-Carlo methods are applied to the computation of the phonon density of states (DOS) from heat capacity data. The approach is introduced and the formalism is described. Simulated data is used to test the method, and its sensitivity to noise. Heat capacity measurements from diamond are used to demonstrate the use of the method with experimental data. Comparison between maximum entropy and reverse Monte-Carlo results shows the form of the entropy used here is correct, and that results are stable and reliable. Major features of the DOS are picked out, and acoustic and optical phonons can be treated with the same approach. The treatment set out in this paper provides a cost-effective and reliable method for studies of the phonon properties of materials.
description: Reprint to improve access. 10 pages, 6 figures
The geometric phase and the dry friction of sleeping tops on inclined planes
Creators: name: Barthmann, Sven
name: Fischer, Thomas M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences

description: We report on the motion of a spinning sleeping top on an inclined plane. Below a critical inclination angle the sleeping tops are force free. The trajectory of a sleeping top on weakly inclined planes in the adiabatic limit is invariant of the angular frequency of the top and thus invariant under a rescaling of the time, however not invariant under time reversal. The stationary trajectory of the sleeping top is characterized by its angle to the in plane horizontal direction. At larger inclinations of the plane the stationary motion of the top becomes unstable and the top accelerates downhill. The behavior points towards a complex law of dry friction of the contact point between the top tip and the material of the inclined plane that depends on a slip parameter. We propose a phenomenological law of dry friction that can explain the relaxation of the top into the sleeping position, the geometric behavior of the top trajectories, and the instability of the stationary motion at larger inclination angles.
Gravitinos from Heavy Scalar Decay
Creators: name: Asaka, Takehiko
name: Nakamura, Shuntaro
name: Yamaguchi, Masahiro
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Cosmological issues of the gravitino production by the decay of a heavy scalar field $X$ are examined, assuming that the damped coherent oscillation of the scalar once dominates the energy of the universe. The coupling of the scalar field to a gravitino pair is estimated both in spontaneous and explicit supersymmetry breaking scenarios, with the result that it is proportional to the vacuum expectation value of the scalar field in general. Cosmological constraints depend on whether the gravitino is stable or not, and we study each case separately. For the unstable gravitino with $M_{3/2} \sim$ 100GeV--10TeV, we obtain not only the upper bound, but also the lower bound on the reheating temperature after the $X$ decay, in order to retain the success of the big-bang nucleosynthesis. It is also shown that it severely constrains the decay rate into the gravitino pair. For the stable gravitino, similar but less stringent bounds are obtained to escape the overclosure by the gravitinos produced at the $X$ decay. The requirement that the free-streaming effect of such gravitinos should not suppress the cosmic structures at small scales eliminates some regions in the parameter space, but still leaves a new window of the gravitino warm dark matter. Implications of these results to inflation models are discussed. In particular, it is shown that modular inflation will face serious cosmological difficulty when the gravitino is unstable, whereas it can escape the constraints for the stable gravitino. A similar argument offers a solution to the cosmological moduli problem, in which the moduli is relatively heavy while the gravitino is light.
description: 14 pages, 8 figures
Monte Carlo evaluation of the continuum limit of the two-point function of the Euclidean free real scalar field subject to affine quantization
Creators: name: Fantoni, Riccardo
name: Klauder, John R.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Computational Physics (physics.comp-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study canonical and affine versions of the quantized covariant Euclidean free real scalar field-theory on four dimensional lattices through the Monte Carlo method. We calculate the two-point function at small values of the bare coupling constant and near the continuum limit at finite volume. Our investigation shows that affine quantization is able to give meaningful results for the two-point function for which is not available an exact analytic result and therefore numerical methods are necessary.
description: 14 pages, 3 figures, 1 table
Binary system delays and timing noise in searches for gravitational waves from known pulsars
Creators: name: Pitkin, Matthew
name: Woan, Graham
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The majority of fast millisecond pulsars are in binary systems, so that any periodic signal they emit is modulated by both Doppler and relativistic effects. Here we show how well-established binary models can be used to account for these effects in searches for gravitational waves from known pulsars within binary systems. A seperate issue affecting certain pulsar signals is that of timing noise and we show how this, with particular reference to the Crab pulsar, can be compensated for by using regularly updated timing ephemerides.
description: 10 pages, 11 figures, accepted by Phys. Rev. D
Low dimensional behavior in three-dimensional coupled map lattices
Creators: name: Muruganandam, Paulsamy
name: Francisco, Gerson
name: de Menezes, Marcio
name: Ferreira, Fernando F.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: The analysis of one-, two-, and three-dimensional coupled map lattices is here developed under a statistical and dynamical perspective. We show that the three-dimensional CML exhibits low dimensional behavior with long range correlation and the power spectrum follows $1/f$ noise. This approach leads to an integrated understanding of the most important properties of these universal models of spatiotemporal chaos. We perform a complete time series analysis of the model and investigate the dependence of the signal properties by change of dimension.
description: 7 pages, 6 figures (revised)
Curricular integration of elementary French as a second language by non-specialist teachers
Creators: name: Swansborough, Robert Paul
Publisher: name: University of British Columbia
Year: 2008

description: The aim of this study was threefold. Firstly, the feasibility of the curricular integration of French with another content area by non-specialist elementary teachers with low to average communicative competency in French was investigated. Secondly, the reaction of these teachers to "Explorons la France," an integrated teaching resource incorporating curricular integration, was examined. Thirdly, the study proposed to investigate any changes in students' attitude toward French after their teachers had used the teaching resource, thereby adding a second language component to their study of a content area. There were three instruments used in the course of this study. The first was a teacher questionnaire to measure teacher satisfaction and readiness. The second instrument was an Intermediate Attitudinal scale designed to measure attitudes towards French language and culture. Lastly, an interview questionnaire was administered to ten key individuals involved in French Language Education in British Columbia. The issue of student attitudes toward French improving after having used the language as a tool for further learning was not supported by the data collected. However, further data collected supported the remaining questions. Curricular integration of E.F.S.L., by non-specialist teachers with low to average linguistic skills in French, is supported by the results of the teacher questionnaire. After having had an opportunity to work with the "Explorons la France" resource, non-specialist teachers involved expressed a positive reaction to the document. The third research question, attitudinal in nature, examined whether success with an initial attempt at curricular integration would spur non-specialist teachers on to subsequent attempts at further curricular integration. The teacher reaction was generally positive. The fourth research question examined the question of E.F.S.L. and the feasibility of curriculum integration by non-specialists, from administrative perspectives. Results indicate approval of the mandate of E.F.S.L. and support for the exploration of means of integrating French within the curriculum. Notwithstanding certain reservations, the teachers and administrators involved in the study generally expressed optimistic views about the mandating of Elementary French as a Second Language as of Grade 5 in general and its integration within other, specific curricular areas.
Factors that support inclusive schooling
Creators: name: Spruston, Linda Maureen
Publisher: name: University of British Columbia
Year: 2008

description: This study investigates the factors that support inclusive schooling in five school districts in British Columbia. Factors supportive of inclusive schooling were identified through a review of the literature and a questionnaire was constructed to guide the interviews. Individuals representing six different roles in the education system, from five school districts, were interviewed for their responses. It was found that the factor that supports inclusion more than any of the factors investigated in the study is a strong belief and committment to the idea of inclusion. A belief in inclusion was followed by leadership at all levels of the system, inservice and preservice training, clear written policy at a district level, and needed supports, particularly in the form of time for collaboration and problem-solving activities. Areas for further study include: behaviourally disturbed children and inclusion, teacher contract language and inclusion, the merger of special and regular education and the role of the special education assistant.
OPTIMADE, an API for exchanging materials data
Creators: name: Andersen, Casper W.
name: Armiento, Rickard
name: Blokhin, Evgeny
name: Conduit, Gareth J.
name: Dwaraknath, Shyam
name: Evans, Matthew L.
name: Fekete, Ádám
name: Gopakumar, Abhijith
name: Gražulis, Saulius
name: Merkys, Andrius
name: Mohamed, Fawzi
name: Oses, Corey
name: Pizzi, Giovanni
name: Rignanese, Gian-Marco
name: Scheidgen, Markus
name: Talirz, Leopold
name: Toher, Cormac
name: Winston, Donald
name: Aversa, Rossella
name: Choudhary, Kamal
name: Colinet, Pauline
name: Curtarolo, Stefano
name: Di Stefano, Davide
name: Draxl, Claudia
name: Er, Suleyman
name: Esters, Marco
name: Fornari, Marco
name: Giantomassi, Matteo
name: Govoni, Marco
name: Hautier, Geoffroy
name: Hegde, Vinay
name: Horton, Matthew K.
name: Huck, Patrick
name: Huhs, Georg
name: Hummelshøj, Jens
name: Kariryaa, Ankit
name: Kozinsky, Boris
name: Kumbhar, Snehal
name: Liu, Mohan
name: Marzari, Nicola
name: Morris, Andrew J.
name: Mostofi, Arash
name: Persson, Kristin A.
name: Petretto, Guido
name: Purcell, Thomas
name: Ricci, Francesco
name: Rose, Frisco
name: Scheffler, Matthias
name: Speckhard, Daniel
name: Uhrin, Martin
name: Vaitkus, Antanas
name: Villars, Pierre
name: Waroquiers, David
name: Wolverton, Chris
name: Wu, Michael
name: Yang, Xiaoyu
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The Open Databases Integration for Materials Design (OPTIMADE) consortium has designed a universal application programming interface (API) to make materials databases accessible and interoperable. We outline the first stable release of the specification, v1.0, which is already supported by many leading databases and several software packages. We illustrate the advantages of the OPTIMADE API through worked examples on each of the public materials databases that support the full API specification.
description: 11 pages, 1 table
Calculated phonon modes, infrared and Raman spectra in orthorhombic $α$-MoO$_3$ and monolayer MoO$_3$
Creators: name: Ratnaparkhe, Amol
name: Radha, Santosh Kumar
name: Lambrecht, Walter R. L.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Orhorhombic $α$-MoO$_3$ is a layered oxide with various applications and with excellent potential to be exfoliated as a 2D ultrathin film or monolayer. In this paper, we present a first-principles computational study of its vibrational properties. Our focus is on the zone center modes which can be measured by a combination of infared and Raman spectroscopy. The polarization dependent spectra are simulated. Calculations are also performed for a monolayer form in which "double layers" of Mo$_2$O$_6$ which are weakly van der Waals bonded in the $α$-structure are isolated. Shift in phonon frequencies are analyzed.
description: 13 pages, 13 figures, 14 tables
Bias-driven large power microwave emission from MgO-based tunnel magnetoresistance devices
Creators: name: Deac, Alina M.
name: Fukushima, Akio
name: Kubota, Hitoshi
name: Maehara, Hiroki
name: Suzuki, Yoshishige
name: Yuasa, Shinji
name: Nagamine, Yoshinori
name: Tsunekawa, Koji
name: Djayaprawira, David D.
name: Watanabe, Naoki
Publisher: name: arXiv
Year: 2008
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: Spin-momentum transfer between a spin-polarized current and a ferromagnetic layer can induce steady-state magnetization precession, and has recently been proposed as a working principle for ubiquitous radio-frequency devices for radar and telecommunication applications. However, to-date, the development of industrially attractive prototypes has been hampered by the inability to identify systems which can provide enough power. Here, we demonstrate that microwave signals with device-compatible output power levels can be generated from a single magnetic tunnel junction with a lateral size of 100 nm, seven orders of magnitude smaller than conventional radio-frequency oscillators. We find that in MgO magnetic tunnel junctions the perpendicular torque induced by the spin-polarized current on the local magnetization can reach 25% of the in-plane spin-torque term, while exhibiting a different bias-dependence. Both findings contrast with the results obtained on all-metallic structures - previously investigated -, reflecting the fundamentally different transport mechanisms in the two types of structures.
description: 6 figures 1 supplementary information file
Transition of the initial mass function in the metal-poor environments
Creators: name: Chon, Sunmyon
name: Omukai, Kazuyuki
name: Schneider, Raffaella
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We study star cluster formation in a low-metallicity environment using three dimensional hydrodynamic simulations. Starting from a turbulent cloud core, we follow the formation and growth of protostellar systems with different metallicities ranging from $10^{-6}$ to $0.1~Z_{\odot}$. The cooling induced by dust grains promotes fragmentation at small scales and the formation of low-mass stars with $M_{*} \sim 0.01$--$0.1~M_{\odot}$ when $Z/Z_{\odot} \gtrsim 10^{-5}$. While the number of low-mass stars increases with metallicity, the stellar mass distribution is still top-heavy for $Z/Z_{\odot} \lesssim 10^{-2}$ compared to the Chabrier initial mass function (IMF). In these cases, star formation begins after the turbulent motion decays and a single massive cloud core monolithically collapses to form a central massive stellar system. The circumstellar disk preferentially feeds the mass to the central massive stars, making the mass distribution top-heavy. When $Z/Z_{\odot}=0.1$, collisions of the turbulent flows promote the onset of the star formation and a highly filamentary structure develops owing to efficient fine-structure line cooling. In this case, the mass supply to the massive stars is limited by the local gas reservoir and the mass is shared among the stars, leading to a Chabrier-like IMF. We conclude that cooling at the scales of the turbulent motion promotes the development of the filamentary structure and works as an important factor leading to the present-day IMF.
description: 20 pages, 14 figures, accepted for publication in MNRAS
Top ten accelerating cosmological models
Creators: name: Szydlowski, Marek
name: Kurek, Aleksandra
name: Krawiec, Adam
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Recent astronomical observations indicate that the Universe is presently almost flat and undergoing a period of accelerated expansion. Basing on Einstein's general relativity all these observations can be explained by the hypothesis of a dark energy component in addition to cold dark matter (CDM). Because the nature of this dark energy is unknown, it was proposed some alternative scenario to explain the current accelerating Universe. The key point of this scenario is to modify the standard FRW equation instead of mysterious dark energy component. The standard approach to constrain model parameters, based on the likelihood method, gives a best-fit model and confidence ranges for those parameters. We always arbitrary choose the set of parameters which define a model which we compare with observational data. Because in the generic case, the introducing of new parameters improves a fit to the data set, there appears the problem of elimination of model parameters which can play an insufficient role. The Bayesian information criteria of model selection (the AIC and BIC) are dedicated to promotion a set of parameters which should be incorporated to the model. We divide class of all accelerating cosmological models into two groups according to the two types of explanation acceleration of the Universe. Then the Bayesian framework of model selection is used to determine the set of parameters which gives preferred fit to the SNIa data. We find a few of flat cosmological models which can be recommend by both the Bayes factor and Akaike information criterion.
description: RevTeX4, 11 pages, 7 figures; v2 some clarifications, bibliography additions, new figure (comparisons with respect to LambdaCDM)
The heating mechanism for the warm/cool dust in powerful, radio-loud AGN
Creators: name: Tadhunter, C.
name: Dicken, D.
name: Holt, J.
name: Inskip, K.
name: Morganti, R.
name: Axon, D.
name: Buchanan, C.
name: Delgado, R. González
name: Barthel, P.
name: van Bemmel, I.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The uncertainty surrounding the nature of the heating mechanism for the dust that emits at mid- to far-IR (MFIR) wavelengths in active galaxies limits our understanding of the links between active galactic nuclei (AGN) and galaxy evolution, as well as our ability to interpret the prodigious infrared and sub-mm emission of some of the most distant galaxies in the Universe. Here we report deep Spitzer observations of a complete sample of powerful, intermediate redshift (0.05 < z < 0.7) radio galaxies and quasars. We show that AGN power, as traced by [OIII]5007 emission, is strongly correlated with both the mid-IR (24 micron) and the far-IR (70 micron) luminosities, however, with increased scatter in the 70 micron correlation. A major cause of this increased scatter is a group of objects that falls above the main correlation and displays evidence for prodigious recent star formation activity at optical wavelengths, along with relatively cool MFIR colours. These results provide evidence that illumination by the AGN is the primary heating mechanism for the dust emitting at both 24 and 70 microns, with starbursts dominating the heating of the cool dust in only 20 -- 30% of objects. This implies that powerful AGN are not always accompanied by the type of luminous starbursts that are characteristic of the peak of activity in major gas-rich mergers.
description: 13 pages, 3 figures. Accepted for publication in astrophysical journal letters
The Foundation Supernova Survey: Photospheric Velocity Correlations in Type Ia Supernovae
Creators: name: Dettman, Kyle G.
name: Jha, Saurabh W.
name: Dai, Mi
name: Foley, Ryan J.
name: Rest, Armin
name: Scolnic, Daniel M.
name: Siebert, Matthew R.
name: Chambers, K. C.
name: Coulter, D. A.
name: Huber, M. E.
name: Johnson, E.
name: Jones, D. O.
name: Kilpatrick, C. D.
name: Kirshner, R. P.
name: Pan, Y. -C.
name: Riess, A. G.
name: Schultz, A. S. B.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The ejecta velocities of type-Ia supernovae (SNe Ia), as measured by the Si II $λ6355$ line, have been shown to correlate with other supernova properties, including color and standardized luminosity. We investigate these results using the Foundation Supernova Survey, with a spectroscopic data release presented here, and photometry analyzed with the SALT2 light-curve fitter. We find that the Foundation data do not show significant evidence for an offset in color between SNe Ia with high and normal photospheric velocities, with $Δc = 0.005 \pm 0.014$. Our SALT2 analysis does show evidence for redder high-velocity SN Ia in other samples, including objects from the Carnegie Supernova Project, with a combined sample yielding $Δc = 0.017 \pm 0.007$. When split on velocity, the Foundation SN Ia also do not show a significant difference in Hubble diagram residual, $ΔHR = 0.015 \pm 0.049$ mag. Intriguingly, we find that SN Ia ejecta velocity information may be gleaned from photometry, particularly in redder optical bands. For high-redshift SN Ia, these rest-frame red wavelengths will be observed by the Nancy Grace Roman Space Telescope. Our results also confirm previous work that SN Ia host-galaxy stellar mass is strongly correlated with ejecta velocity: high-velocity SN Ia are found nearly exclusively in high-stellar-mass hosts. However, host-galaxy properties alone do not explain velocity-dependent differences in supernova colors and luminosities across samples. Measuring and understanding the connection between intrinsic explosion properties and supernova environments, across cosmic time, will be important for precision cosmology with SNe Ia.
description: Submitted to AAS Journals
On the determinant bundles of abelian schemes
Creators: name: Maillot, Vincent
name: Rössler, Damian
Publisher: name: arXiv
Year: 2006
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 14K15; 14K25; 14C40

description: Let $π:\CA\ra S$ be an abelian scheme over a scheme $S$ which is quasi-projective over an affine noetherian scheme and let $\CL$ be a symmetric, rigidified, relatively ample line bundle on $\CA$. We show that there is an isomorphism \det(π_*\CL)^{øtimes 24}\simeq\big(π_*ω_{\CA}^{\vee}\big)^{øtimes 12d} of line bundles on $S$, where $d$ is the rank of the (locally free) sheaf $π_*\CL$. We also show that the numbers 24 and $12d$ are sharp in the following sense: if $N>1$ is a common divisor of 12 and 24, then there are data as above such that \det(π_*\CL)^{øtimes (24/N)}\not\simeq\big(π_*ω_{\CA}^{\vee}\big)^{øtimes (12d/N)}.
description: 8 pages
Additional file 1 of Clinical features and treatment outcomes of pediatric Langerhans cell histiocytosis with macrophage activation syndrome-hemophagocytic lymphohistiocytosis
Creators: name: Wang, Dong
name: Chen, Xi-Hua
name: Wei, Ang
name: Zhou, Chun-Ju
name: Zhang, Xue
name: Ma, Hong-Hao
name: Lian, Hong-Yun
name: Zhang, Li
name: Zhang, Qing
name: Huang, Xiao-Tong
name: Wang, Chan-Juan
name: Yang, Ying
name: Liu, Wei
name: Wang, Tian-You
name: Li, Zhi-Gang
name: Cui, Lei
name: Zhang, Rui
Publisher: name: figshare
Year: 2022
Subjects: subject: Medicine
subject: Immunology
subject: FOS: Clinical medicine
subject: Cancer
subject: Virology

description: Additional file 1: Table S1. Clinical characteristics and biologic parameters of LCH patients with MAS-HLH. Table S2. Longitudinal evaluation of cell-free BRAF-V600E during dabrafenib treatment. Figure S1. Histology of LCH lesions obtained from a skin biopsy (A-C) or a bone marrow biopsy (D-F) in the LCH patients with MAS-HLH. (A) and (D): HE staining; (B) and (E): CD1a-positive immunostaining; (C) and (F): CD207 (langerin)-positive immunostaining. Figure S2. Study cohorts of pediatric LCH and MAS-HLH. Figure S3. Comparison of DAS after one month of dabrafenib and five weeks (two therapeutic courses) of second-line chemotherapy.
The JRC-Acquis: A multilingual aligned parallel corpus with 20+ languages
Creators: name: Steinberger, Ralf
name: Pouliquen, Bruno
name: Widiger, Anna
name: Ignat, Camelia
name: Erjavec, Tomaz
name: Tufis, Dan
name: Varga, Daniel
Publisher: name: arXiv
Year: 2006
Subjects: subject: Computation and Language (cs.CL)
subject: FOS: Computer and information sciences
subject: H.3.1; H.3.6

description: We present a new, unique and freely available parallel corpus containing European Union (EU) documents of mostly legal nature. It is available in all 20 official EUanguages, with additional documents being available in the languages of the EU candidate countries. The corpus consists of almost 8,000 documents per language, with an average size of nearly 9 million words per language. Pair-wise paragraph alignment information produced by two different aligners (Vanilla and HunAlign) is available for all 190+ language pair combinations. Most texts have been manually classified according to the EUROVOC subject domains so that the collection can also be used to train and test multi-label classification algorithms and keyword-assignment software. The corpus is encoded in XML, according to the Text Encoding Initiative Guidelines. Due to the large number of parallel texts in many languages, the JRC-Acquis is particularly suitable to carry out all types of cross-language research, as well as to test and benchmark text analysis software across different languages (for instance for alignment, sentence splitting and term extraction).
description: A multilingual textual resource with meta-data freely available for download at http://langtech.jrc.it/JRC-Acquis.html
Optimizing multilayer Bayesian neural networks for evaluation of fission yields
Creators: name: Wang, Zi-Ao
name: Pei, Junchen
Publisher: name: arXiv
Year: 2021
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The Bayesian machine learning is a promising tool for the evaluation of nuclear fission data but its potential capability has not been fully realized. We attempt to optimize the performances of the multilayer Bayesian neural networks for evaluations of fission yields. The influences of adjustments of learning data, activation functions, network structures have been studied. In particular, negative values of net functions have been penalized to avoid non-physical inferences of fission yields. Presently the network with double hidden layers has optimal performances compared to the single-layer or deeper networks. These studies are essential for further developments of precise evaluation methods.
description: 5 pages and 5 figures. arXiv admin note: text overlap with arXiv:2102.09314
Ground-state Properties of Small-Size Nonlinear Dynamical Lattices
Creators: name: Buonsante, P.
name: Kevrekidis, P.
name: Penna, V.
name: Vezzani, A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We investigate the ground state of a system of interacting particles in small nonlinear lattices with M > 2 sites, using as a prototypical example the discrete nonlinear Schroedinger equation that has been recently used extensively in the contexts of nonlinear optics of waveguide arrays, and Bose-Einstein condensates in optical lattices. We find that, in the presence of attractive interactions, the dynamical scenario relevant to the ground state and the lowest-energy modes of such few-site nonlinear lattices reveals a variety of nontrivial features that are absent in the large/infinite lattice limits: the single-pulse solution and the uniform solution are found to coexist in a finite range of the lattice intersite coupling where, depending on the latter, one of them represents the ground state; in addition, the single-pulse mode does not even exist beyond a critical parametric threshold. Finally, the onset of the ground state (modulational) instability appears to be intimately connected with a non-standard (``double transcritical'') type of bifurcation that, to the best of our knowledge, has not been reported previously in other physical systems.
description: 7 pages, 4 figures; submitted to PRE
Mathematics educators' perspectives on outcome-based education: Alignment with the learning paradigm of tertiary education in the Philippines
Creators: name: Januard D. Dagdag
Publisher: name: Nakhon Pathom Rajabhat University
Year: 2019
Subjects: Outcome-based education, perspectives, OBE dimensions, learning paradigm, constructive alignment

description: Journal of Thai Interdisciplinary Research, 14, 3, 1
Spin-polarized tunneling microscopy and the Kondo effect
Creators: name: Patton, Kelly R.
name: Kettemann, Stefan
name: Zhuravlev, Andrey
name: Lichtenstein, Alexander
Publisher: name: arXiv
Year: 2007
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We present a theory for spin-polarized scanning tunneling microscopy (SP-STM) of a Kondo impurity on an unpolarized metallic substrate. The spin polarization of the SP-STM breaks the spin symmetry of the Kondo system, similar to an applied magnetic field, leading to a splitting of the Abrikosov-Suhl-Kondo resonance. The amount of splitting is controlled by the strength of the coupling between the impurity and the SP-STM tip and also the overall spin polarization of the SP-STM.
description: 4 pages, 4 figures
Quantum interference and imaging using intense laser fields
Creators: name: Amini, Kasra
name: Chacón, Alexis
name: Eckart, Sebastian
name: Fetić, Benjamin
name: Kübel, Matthias
Publisher: name: arXiv
Year: 2021
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: The interference of matter waves is one of the intriguing features of quantum mechanics that has impressed researchers and laymen since it was first suggested almost a century ago. Nowadays, attosecond science tools allow us to utilize it in order to extract valuable information from electron wavepackets. Intense laser fields are routinely employed to create electron wave packets and control their motion with sub-femtosecond and sub-nanometer precision. In this perspective article, we discuss some of the peculiarities of intense light-matter interaction. We review some of the most important techniques used in attosecond imaging, namely photoelectron holography and laser-induced electron diffraction. We attempt to ask and answer a few questions that do not get asked very often. For example, if we are interested in position space information, why are measurements carried out in momentum space? How to accurately retrieve photoelecron spactra from the numerical solution of the time-dependent Schrödinger equation? And, what causes the different coherence properties of high-harmonic generation and above-threshold ionization?
Stories about UFOs
Creators: name: Parker, Verdena
name: Campbell, Amy
name: Newbold, Lindsey
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2022
Subjects: subject: hup

description: Audio file VP-070309-07: Two stories about UFOs, told in Hupa alternating with English. The texts in this file came to be referred to as the "UFO Stories" in transcriptions and associated documents prepared by the research team. This recording was previously deposited with the Endangered Language Archive (ELAR) with identifier "0186-20140318 - Two stories about UFOs," part of the collection "Expanding the Documentation and Description of Hupa (Athabaskan)" (collection ID hupa-campbell-0186).