cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
IEA Wind Task 52 Lunch Seminar Series (February 2023)
Creators: name: Gottschall, Julia
name: Schlipf, David
name: Stoekl, Alexander
name: Oldroyd, Andrew
name: Guo, Feng
name: Schild, Axel
name: Black, Andrew
name: Becker, Johannes
name: Gomez, Paula
name: Simon, Elliot
name: Courtney, Michael
name: Ueda, Yuko
name: Clive, Peter
Publisher: name: Zenodo
Year: 2023

description: This is the material presented during the (first) IEA Wind Task 52 Lunch Seminar Series, which was held online on between 13-16 February 2023 (all days 13-14 CET). The seminars were opened with an introduction by the Operating Agent, see 20230215_IEA-Wind-Task52_lunch-seminar-INTRO_GotJul (1), followed by these presentations: Day 1 -- focus on Lidar-Assisted Control (LAC), organized by David Schlipf (20230213_LAC_WG) Feng Guo on "Improved modeling of lidar wind preview for wind turbine control" Feng_Guo_LunchSeminar_v2n Axel Schild on "Lidar-assisted model predictive turbine control" Schild_Challenges_on_the_way_to_indstrial_reality Day 2 -- focus on Complex Terrain, organized by Alexander Stoekl Andrew Hastings Black on "Point and lidar wind field reconstruction sensitivities in complex flow" IEATask52_LunchWebinarSeries_ComplexFlowWFR_AndrewBlack_14FEB2023 Johannes Becker on "Scanning LiDAR in Complex Terrain for Wind Ressource Assessment" GEO-NET_IEA-Task52-Lunch-Session_EWINO-Approach-Scanning-LiDAR-in-WRA_20230214 Day 3 -- focus on Scanning Lidar Offshore, organized by Andrew Oldroyd Yuko Ueda on "Validation of near-shore wind measurements using a dual scanning LiDAR" 230215_task52_lunch_seminar_ueda Paula Gómez, Elliot Simon, Mike Courtney on "Guidelines for the usage of scanning lidars for power curve verification" 20230215_IEA52_webinar Day 4 -- focus on Floating Lidar, organized by Julia Gottschall Introductory presentation "Floating lidar within the IEA Wind 'Lidar' Task so far ..." 20230216_IEA-Wind-Task52_Lunch-seminar_GotJul Peter Clive on "Floating lidar standards and guidance, an update centred around the upcoming technical specification IEC 61400-50-4" FLS Standard - update - 2023-02-16 Please note that each document or presentation may have its own license. If in doubt about reusing or citing any of the material presented here, please contact the authors.
Non-supersymmetric heterotic model building
Creators: name: Blaszczyk, Michael
name: Nibbelink, Stefan Groot
name: Loukas, Orestis
name: Ramos-Sanchez, Saul
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We investigate orbifold and smooth Calabi-Yau compactifications of the non-supersymmetric heterotic SO(16)xSO(16) string. We focus on such Calabi-Yau backgrounds in order to recycle commonly employed techniques, like index theorems and cohomology theory, to determine both the fermionic and bosonic 4D spectra. We argue that the N=0 theory never leads to tachyons on smooth Calabi-Yaus in the large volume approximation. As twisted tachyons may arise on certain singular orbifolds, we conjecture that such tachyonic states are lifted in the full blow-up. We perform model searches on selected orbifold geometries. In particular, we construct an explicit example of a Standard Model-like theory with three generations and a single Higgs field.
description: 1+30 pages latex, 11 tables; v2: references and minor revisions added, matches version published in JHEP
High confinement, high yield Si3N4 waveguides for nonlinear optical application
Creators: name: Epping, Jörn P.
name: Hoekman, Marcel
name: Mateman, Richard
name: Leinse, Arne
name: Heideman, René G.
name: van Rees, Albert
name: van der Slot, Peter J. M.
name: Lee, Chris J.
name: Boller, Klaus-J.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: In this paper we present a novel fabrication technique for silicon nitride (Si3N4) waveguides with a thickness of up to 900 nm, which are suitable for nonlinear optical applications. The fabrication method is based on etching trenches in thermally oxidized silicon and filling the trenches with Si3N4. Using this technique no stress-induced cracks in the Si3N4 layer were observed resulting in a high yield of devices on the wafer. The propagation losses of the obtained waveguides were measured to be as low as 0.4 dB/cm at a wavelength of around 1550 nm.
description: 10 pages, 4 figures
Theoretical investigation of edge reconstruction in the $ν$=5/2 and 7/3 fractional quantum Hall states
Creators: name: Zhang, Yuhe
name: Wu, Ying-Hai
name: Hutasoit, Jimmy A.
name: Jain, Jainendra K.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The edge physics of the $ν=5/2$ fractional quantum Hall state is of relevance to several recent experiments that use it as a probe to gain insight into the nature of the bulk state. We perform calculations in a semi-realistic setup with positive background charge at a distance $d$, by exact diagonalization both in the full Hilbert space (neglecting Landau level mixing) and in the restricted Pfaffian basis of edge excitations. Our principal finding is that the 5/2 edge is unstable to a reconstruction except for very small $d$. In addition, the interactions between the electrons in the second Landau level and the lowest Landau level enhance the tendency toward edge reconstruction. We identify the bosonic and fermionic modes of edge excitations and obtain their dispersions by back-calculating from the energy spectra as well as directly from appropriate trial wave functions. We find that the edge reconstruction is driven by an instability in the fermionic sector for setback distances close to the critical ones. We also study the edge of the $ν=7/3$ state and find that edge reconstruction occurs here more readily than for the $ν=1/3$ state. Our study indicates that the $ν=5/2$ and 7/3 edge states are reconstructed for all experimental systems investigated so far and thus must be taken into account when analyzing experimental results. We also consider an effective field theory to gain insight into how edge reconstruction might influence various observable quantities.
description: 19 pages, 15 figures
Higgs $\rightarrow$ $μτ$ as an indication for $S_4$ flavor symmetry
Creators: name: Campos, Miguel D.
name: Hernández, A. E. Cárcamo
name: Päs, Heinrich
name: Schumacher, Erik
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Lepton flavor violating Higgs decays can arise in flavor symmetry models where the Higgs sector is responsible for both the electroweak and the flavor symmetry breaking. Here we advocate an $S_4$ three-Higgs-doublet model where tightly constrained flavor changing neutral currents are suppressed by a remnant $Z_3$ symmetry. A small breaking of this $Z_3$ symmetry can explain the $2.4\,σ$ excess of Higgs decay final states with a $μτ$ topology reported recently by CMS if the new neutral scalars are light. The model also predicts sizable rates for lepton flavor violating Higgs decays in the $eτ$ and $e μ$ channels because of the unifying $S_4$ flavor symmetry.
description: 15+9 pages, 7 figures, updated for publication in PRD
Standard Model Predictions and New Physics Sensitivity in B->DD Decays
Creators: name: Jung, Martin
name: Schacht, Stefan
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: An extensive model-independent analysis of B->DD decays is carried out employing SU(3) flavour symmetry, including symmetry-breaking corrections. Several theoretically clean observables are identified which allow for testing the Standard Model. These include the known time-dependent CP asymmetries, the penguin pollution of which can be controlled in this framework, but notably also quasi-isospin relations which are experimentally well accessible and unaffected by symmetry-breaking corrections. Theoretical assumptions can be kept to a minimum and controlled by additional sum rules. Available data are used in global fits to predict the branching ratio for the B0->DsDs decay as well as several CP asymmetries which have not been measured so far, and future prospects are analyzed.
description: 14+5 pages, 7 figures. v2: references added and a few typos corrected
Performance of Identities - Emergence of The Self Through The Practice of Voice and Remembering
Creators: name: Ivsic, Lucija
Publisher: name: Monash University
Year: 2024
Subjects: classificationCode: 460707
subject: Sound and music computing
classificationCode: 430208
subject: Intangible heritage
classificationCode: 460708
subject: Virtual and mixed reality
classificationCode: 401304
subject: Photogrammetry and remote sensing
classificationCode: 360504
subject: Interactive media

description: This practice-based PhD integrates artistic practice, technology, and academic research to investigate the emergent nature of identity. Explored through the creation of two artefacts: i) an interactive virtual reality work built using point clouds of the artist’s home called What Homes are Made of: The Architecture of Displacement and ii) a novel interactive, technological choir of 16 singers called Transhuman Ansambl, the research proposes an aesthetic framework for working with remote sensing technologies and point clouds as a new visual language in digital art and an innovative way to preserve, transmit, and re-imagine intangible cultural heritage through technology.
Renormalization group-induced phenomena of top pairs from four-quark effective operators
Creators: name: Jung, Sunghoon
name: Ko, P.
name: Yoon, Yeo Woong
name: Yu, Chaehyun
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study the renormalization group(RG) evolution of four-quark operators that contribute to the top pair production. In particular, we focus on the cases in which certain observables are \emph{first} induced from the one-loop RG while being absent at tree-level. From the operator mixing pattern, we classify all such RG-induced phenomena and underlying models that can induce them. We then calculate the full one-loop QCD RG evolution as the leading estimator of the effects and address the question of which RG-induced phenomena have largest and observable effects. The answer is related to the color structure of QCD. The studied topics include the RG-induction of top asymmetries, polarizations and polarization mixings as well as issues arising at this order. The RG-induction of top asymmetries is further compared with the generation of asymmetries from QCD and QED at one-loop order. We finally discuss the validity of using the RG as the proxy of one-loop effects on the top pair production. As an aside, we clarify the often-studied relations between top pair observables.
description: 40 pages, 21 figures. v2: published version with discussions slightly revised and Fig.2 and 9 corrected
title: Mediale Geschichtsvermittlung historischer Weiblichkeit
Creators: name: Luger, Katharina Sophie
Year: 2021

description: Filme prägen das gesellschaftliche Bild der Geschichte und gelten als Leitmedium in der Geschichtsvermittlung. Sie vermögen es einzelne historische Puzzleteile gesammelt zu einer sicht- und hörbaren Geschichte zusammenzufügen. Jedoch dürfen Filme niemals mit den Ansprüchen eines historischen Dokuments gemessen werden, da ein gewisser Grad an Fiktionalität unvermeidbar ist und sie immer auch ein Nebenprodukt ihres Zeitgeists darstellen. Und obwohl Historienfilme nicht immer geschichtlich korrekt sind und sein können, leisten sie einen medienpädagogischen Beitrag massenwirksam Geschichtsbewusstsein hervorzubringen und zu thematisieren. Die vorliegende Forschungsarbeit wirft einen feministischen Blick darauf, wie die weibliche Herrschaftsfigur, im Besonderen am Beispiel der Kaiserin Elisabeth von Österreich, im Historienfilm dargestellt wird. Diese Forschung beleuchtet einen Aspekt bestehender Untersuchungen in der Theorie der massenmedialen Geschichtsvermittlung, indem die Kommunikation von historischen Inhalten in einer kommerziell gesteuerten Medienlandschaft analysiert wird. Sowohl aus Sicht der feministischen Medienforschung, als auch aus Sicht der Forschung zur massenmedialen Geschichtsvermittlung, ist es wichtig einen kritischen Blick auf die massenmedial vermittelten weiblichen Bilder der Kaiserin Elisabeth zu werfen, durch Techniken der feministischen Filmanalyse kritisch zu hinterfragen und auf historische Authentizität zu überprüfen. Sowohl der historische Geschichtsstrang, aber vor allem die Hauptprotagonistin soll in ihrer Inszenierung dekonstruiert und analysiert werden.
description: Films are shaping society’s image of historic events and are regarded as the leading medium for conveying history. They are able to assemble individual historical puzzle pieces into a visible and audible story. However, films must never be measured by the standards of a historical document since a certain degree of fictionality is unavoidable and they are always a by-product of their zeitgeist. And although historical films are not and cannot always be historically accurate, they do make a media-pedagogical contribution to raising awareness and addressing history effectively and with mass impact. This research highlights an aspect of existing research on the theory of the conveyance of history through mass media by analysing the communication of historical content in a commercially driven media landscape. It takes a feminist look at how female royalty, specifically using the example of Empress Elisabeth of Austria, is portrayed in historical films. From the point of view of research on feminist media and on the conveyance of history through mass media, it is important to take a critical look at how female images of Empress Elisabeth are portrayed by mass media, to critically question them through techniques of feminist film analysis, and to examine them for historical authenticity. Both the historical plot, but above all the depiction of the main protagonist is to be deconstructed and analysed.
The Illustris simulation: the evolving population of black holes across cosmic time
Creators: name: Sijacki, Debora
name: Vogelsberger, Mark
name: Genel, Shy
name: Springel, Volker
name: Torrey, Paul
name: Snyder, Greg
name: Nelson, Dylan
name: Hernquist, Lars
Publisher: name: arXiv
Year: 2014
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We study the properties of black holes and their host galaxies across cosmic time in the Illustris simulation. Illustris is a large scale cosmological hydrodynamical simulation which resolves a (106.5 Mpc)^3 volume with more than 12 billion resolution elements and includes state-of-the-art physical models relevant for galaxy formation. We find that the black hole mass density for redshifts z = 0 - 5 and the black hole mass function at z = 0 predicted by Illustris are in very good agreement with the most recent observational constraints. We show that the bolometric and hard X-ray luminosity functions of AGN at z = 0 and 1 reproduce observational data very well over the full dynamic range probed. Unless the bolometric corrections are largely underestimated, this requires radiative efficiencies to be on average low, epsilon_r <= 0.1, noting however that in our model radiative efficiencies are degenerate with black hole feedback efficiencies. Cosmic downsizing of the AGN population is in broad agreement with the findings from X-ray surveys, but we predict a larger number density of faint AGN at high redshifts than currently inferred. We also study black hole -- host galaxy scaling relations as a function of galaxy morphology, colour and specific star formation rate. We find that black holes and galaxies co-evolve at the massive end, but for low mass, blue and star-forming galaxies there is no tight relation with either their central black hole masses or the nuclear AGN activity.
description: 24 pages, 15 figures. MNRAS accepted. The Illustris website can be found at http://www.illustris-project.org/
Expect the Unexpected: The Impact of Inflation and the Importance of Malaysian Youths Having a Financial Plan
Creators: name: Ating, Rashid
name: Mee, Chong Kim
Publisher: name: Zenodo
Year: 2023
Subjects: millennial, financial literacy, Malaysia

description: In Malaysia, Millennials and the Generation Z hang out with friends at least once or twice a month, and one of their most preferred places to do so is at a Mamak restaurant. They usually have teh tarik before getting something to eat. This all-time favourite drink for Malaysians readily available in Mamak restaurants, stalls, roadside stalls, and kopitiam has seen a price increase.
The Matryoshka Run (II): Time Dependent Turbulence Statistics, Stochastic Particle Acceleration and Microphysics Impact in a Massive Galaxy Cluster
Creators: name: Miniati, Francesco
Publisher: name: arXiv
Year: 2014
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We use the Matryoshka run to study the time dependent statistics of structure-formation driven turbulence in the intracluster medium of a 10$^{15}M_\odot$ galaxy cluster. We investigate the turbulent cascade in the inner Mpc for both compressional and incompressible velocity components. The flow maintains approximate conditions of fully developed turbulence, with departures thereof settling in about an eddy-turnover-time. Turbulent velocity dispersion remains above $700$ km s$^{-1}$ even at low mass accretion rate, with the fraction of compressional energy between 10% and 40%. Normalisation and slope of compressional turbulence is susceptible to large variations on short time scales, unlike the incompressible counterpart. A major merger occurs around redshift $z\simeq0$ and is accompanied by a long period of enhanced turbulence, ascribed to temporal clustering of mass accretion related to spatial clustering of matter. We test models of stochastic acceleration by compressional modes for the origin of diffuse radio emission in galaxy clusters. The turbulence simulation model constrains an important unknown of this complex problem and brings forth its dependence on the elusive micro-physics of the intracluster plasma. In particular, the specifics of the plasma collisionality and the dissipation physics of weak shocks affect the cascade of compressional modes with strong impact on the acceleration rates. In this context radio halos emerge as complex phenomena in which a hierarchy of processes acting on progressively smaller scales are at work. Stochastic acceleration by compressional modes implies statistical correlation of radio power and spectral index with merging cores distance, both testable in principle with radio surveys.
description: 15 pages (emulateapj format), 8 figures,revised according to referee's comments, now accepted to ApJ
Neutrino viscosity and drag: impact on the magnetorotational instability in protoneutron stars
Creators: name: Guilet, Jerome
name: Mueller, Ewald
name: Janka, Hans-Thomas
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The magnetorotational instability (MRI) is a promising mechanism to amplify the magnetic field in fast rotating protoneutron stars. The diffusion of neutrinos trapped in the PNS induces a transport of momentum, which can be modelled as a viscosity on length-scales longer than the neutrino mean free path. This neutrino-viscosity can slow down the growth of MRI modes to such an extent that a minimum initial magnetic field strength of $\gtrsim 10^{12}\, {\rm G}$ is needed for the MRI to grow on a sufficiently short time-scale to potentially affect the explosion. It is uncertain whether the magnetic field of fast rotating progenitor cores is strong enough to yield such an initial magnetic field in PNS. At MRI wavelengths shorter than the neutrino mean free path, on the other hand, neutrino radiation does not act as a viscosity but rather induces a drag on the velocity with a damping rate independent of the wavelength. We perform a linear analysis of the MRI in this regime, and apply our analytical results to the PNS structure from a one-dimensional numerical simulation. We show that in the outer layers of the PNS, the MRI can grow from weak magnetic fields at wavelengths shorter than the neutrino mean free path, while deeper in the PNS MRI growth takes place in the viscous regime and requires a minimum magnetic field strength.
description: Accepted for publication in MNRAS, one figure added (Fig. 11), 14 pages, 11 figures
Isgur-Wise functions and unitary representations of the Lorentz group : the meson case j = 1/2
Creators: name: Yaouanc, A. Le
name: Oliver, L.
name: Raynal, J. -C.
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We pursue the group theoretical method to study Isgur-Wise functions. We apply the general formalism, formerly applied to the baryon case j^P = 0^+ (for Λ_b -> Λ_c \ell ν), to mesons with j^P = 1/2^-, i.e. $\overline{B} -> D(D^{(*)})\ellν. In this case, more involved from the angular momentum point of view, only the principal series of unitary representations of the Lorentz group contribute. We obtain an integral representation for the IW function xi(w) with a positive measure, recover the bounds for the slope and the curvature of xi(w) obtained from the Bjorken-Uraltsev sum rule method, and get new bounds for higher derivatives. We demonstrate also that if the lower bound for the slope is saturated, the measure is a delta-function, and xi(w) is given by an explicit elementary function. Inverting the integral formula, we obtain the measure in terms of the IW function, allowing to formulate criteria to decide if a given ansatz for the Isgur-Wise function is compatible or not with the sum rule constraints. Moreover, we have obtained an upper bound on the IW function valid for any value of w. We compare these theoretical constraints to a number of forms for ξ(w) proposed in the literature. The "dipole" function ξ(w) = (2/(w+1))^(2c) satisfies all constraints for c \geq 3/4, while the QCD Sum Rule result including condensates does not satisfy them. Special care is devoted to the Bakamjian-Thomas relativistic quark model in the heavy quark limit and to the description of the Lorentz group representation that underlies this model. Consistently, the IW function satisfies all Lorentz group criteria for any explicit form of the meson Hamiltonian at rest.
description: arXiv admin note: substantial text overlap with arXiv:1402.0798, arXiv:0904.1942
Gutzwiller Density Functional Theory: a formal derivation and application to ferromagnetic nickel
Creators: name: Schickling, Tobias
name: Bünemann, Jörg
name: Gebhard, Florian
name: Weber, Werner
Publisher: name: arXiv
Year: 2014
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We present a detailed derivation of the Gutzwiller Density Functional Theory that covers all conceivable cases of symmetries and Gutzwiller wave functions. The method is used in a study of ferromagnetic nickel where we calculate ground state properties (lattice constant, bulk modulus, spin magnetic moment) and the quasi-particle band structure. Our method resolves most shortcomings of an ordinary Density Functional calculation on nickel. However, the quality of the results strongly depends on the particular choice of the double-counting correction. This constitutes a serious problem for all methods that attempt to merge Density Functional Theory with correlated-electron approaches based on Hubbard-type local interactions.
description: 35 pages, 3 figures, 1 table
Possible new resonance from $W_L W_L$-$hh$ interchannel coupling
Creators: name: Delgado, Rafael L.
name: Dobado, Antonio
name: Llanes-Estrada, Felipe J.
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We propose and theoretically study a possible new resonance caused by strong coupling between the Higgs-Higgs and the W_L W_L (Z_L Z_L) scattering channels, without regard to the intensity of the elastic interaction in either channel at low energy (that could be weak as in the Standard Model). We expose this channel-coupling resonance from unitarity and dispersion relations encoded in the Inverse Amplitude Method, applied to the Electroweak Chiral Lagrangian with a scalar Higgs.
description: 4 pages, 7 figures
Panoramic Direct LiDAR-assisted Visual Odometry
Creators: name: Yuan, Zikang
name: Xu, Tianle
name: Wang, Xiaoxiang
name: Geng, Jinni
name: Yang, Xin
Publisher: name: arXiv
Year: 2024
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences
subject: C.5

description: Enhancing visual odometry by exploiting sparse depth measurements from LiDAR is a promising solution for improving tracking accuracy of an odometry. Most existing works utilize a monocular pinhole camera, yet could suffer from poor robustness due to less available information from limited field-of-view (FOV). This paper proposes a panoramic direct LiDAR-assisted visual odometry, which fully associates the 360-degree FOV LiDAR points with the 360-degree FOV panoramic image datas. 360-degree FOV panoramic images can provide more available information, which can compensate inaccurate pose estimation caused by insufficient texture or motion blur from a single view. In addition to constraints between a specific view at different times, constraints can also be built between different views at the same moment. Experimental results on public datasets demonstrate the benefit of large FOV of our panoramic direct LiDAR-assisted visual odometry to state-of-the-art approaches.
description: 6 pages, 6 figures
Dielectric response of laser-excited silicon at finite electron temperature
Creators: name: Sato, S. A.
name: Shinohara, Y.
name: Otobe, T.
name: Yabana, K.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We calculate the dielectric response of excited crystalline silicon in electron thermal equilibrium by adiabatic time-dependent density functional theory (TDDFT) to model the response to irradiation by high-intensity laser pulses. The real part of the dielectric function is characterized by the strong negative behavior at low frequencies due to excited electron-hole pairs. The response agrees rather well with the numerical pump-probe calculations which simulate electronic excitations in nonequilibrium phase immediately after the laser pulse irradiation. The thermal response is also compared with the Drude model which includes electron effective mass and collision time as fitting parameters. We find that the extracted effective masses are in the range of 0.22-0.36 and lifetimes are in the range of 1-14 fs depending on the temperature. The short Drude lifetimes show that strong damping is possible in the adiabatic TDDFT, despite the absence of explicit electron-electron collisions.
description: 19 pages, 10 figures. arXiv admin note: text overlap with arXiv:1303.3249
Publishing the Grammateus Research Output with the TEI. How our scholarly texts become data
Creators: name: Nury, Elisa
Publisher: name: Zenodo
Year: 2022
Subjects: TEI XML
scholarly writing
VRE
digital publications
open access

description: Presentation slides for a short paper at the TEI2022 Conference presenting the grammateus project and its use of the TEI to encode not only primary sources but also the accompanying scholarly texts.
The effect of massive neutrinos on the Sunyaev-Zeldovich and X-ray observables of galaxy clusters
Creators: name: Roncarelli, Mauro
name: Carbone, Carmelita
name: Moscardini, Lauro
Publisher: name: arXiv
Year: 2014
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Massive neutrinos are expected to influence the formation of the large-scale structure of the Universe, depending on the value of their total mass, $Σm_ν$. In particular Planck data indicate that a non-zero $Σm_ν$ may help to reconcile CMB data with Sunyaev-Zel'dovich (SZ) cluster surveys. In order to study the impact of neutrinos on the SZ and X-ray cluster properties we run a set of six very large cosmological simulations (8$h^{-3}$ Gpc$^3$ comoving volume) that include a massive neutrino particle component: we consider the values of $Σm_ν$ = (0, 0.17, 0.34) eV in two cosmological scenarios to test possible degeneracies. Using the halo catalogues extracted from their outputs we produce 50 mock light-cones and, assuming suitable scaling relations, we determine how massive neutrinos affect SZ and X-ray cluster counts, the $y$-parameter and its power spectrum. We provide forecasts for the South Pole Telescope (SPT) and eROSITA cluster surveys, showing that the number of expected detections is reduced by 40 per cent when assuming $Σm_ν$ =0.34 eV with respect to a model with massless neutrinos. However the degeneracy with $σ_8$ and $Ω_m$ is strong, in particular for X-ray data, requiring the use of additional probes to break it. The $y$-parameter properties are also highly influenced by the neutrino mass fraction, $f_ν$, with $\propto(1-f_ν)^{20}$, considering the cluster component only, and the normalization of the SZ power spectrum is proportional to $(1-f_ν)^{25-30}$. Comparing our findings with SPT and Atacama Cosmology Telescope measurements at $\ell$ = 3000 indicates that, when Planck cosmological parameters are assumed, a value of $Σm_ν\simeq0.34$ eV is required to fit with the data.
description: 13 pages, 10 figures, 3 tables. Accepted for publication by MNRAS. Substantial revisions after reviewer's comments
VOMTC: Vision Objects for Millimeter and Terahertz Communications
Creators: name: Kim, Sunwoo
name: Ahn, Yongjun
name: Park, Daeyoung
name: Shim, Byonghyo
Publisher: name: arXiv
Year: 2024
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Recent advances in sensing and computer vision (CV) technologies have opened the door for the application of deep learning (DL)-based CV technologies in the realm of 6G wireless communications. For the successful application of this emerging technology, it is crucial to have a qualified vision dataset tailored for wireless applications (e.g., RGB images containing wireless devices such as laptops and cell phones). An aim of this paper is to propose a large-scale vision dataset referred to as Vision Objects for Millimeter and Terahertz Communications (VOMTC). The VOMTC dataset consists of 20,232 pairs of RGB and depth images obtained from a camera attached to the base station (BS), with each pair labeled with three representative object categories (person, cell phone, and laptop) and bounding boxes of the objects. Through experimental studies of the VOMTC datasets, we show that the beamforming technique exploiting the VOMTC-trained object detector outperforms conventional beamforming techniques.
Data submission for ICES selected stocks under WKWEST 2021
Creators: name: ICES
Publisher: name: Data Calls
Year: 2022
Subjects: Technologies and data

description: ICES Member Countries are requested to provide data on landings, discards, BMS, biological sample data and effort from commercial fisheries for: pil.27.7, pol.27.67, gur.27.3-8, ple.27.7h-k and sol.27.8c9a.
Use of automated coding methods to assess motivational behaviour in education
Creators: name: Ahmadi, Asghar
Publisher: name: Australian Catholic University
Year: 2022
Subjects: automated behaviour assessment
teacher motivational behaviour
feedback
engagement

description: Teachers’ motivational behaviour is related to important student outcomes. Assessing teachers’ motivational behaviour has been helpful to improve teaching quality and enhance student outcomes. However, researchers in educational psychology have relied on self-report or observer ratings. These methods face limitations on accurately and reliably assessing teachers’ motivational behaviour; thus restricting the pace and scale of conducting research. One potential method to overcome these restrictions is automated coding methods. These methods are capable of analysing behaviour at a large scale with less time and at low costs. In this thesis, I conducted three studies to examine the applications of an automated coding method to assess teacher motivational behaviours. First, I systematically reviewed the applications of automated coding methods used to analyse helping professionals’ interpersonal interactions using their verbal behaviour. The findings showed that automated coding methods were used in psychotherapy to predict the codes of a well-developed behavioural coding measure, in medical settings to predict conversation patterns or topics, and in education to predict simple concepts, such as the number of open/closed questions or class activity type (e.g., group work or teacher lecturing). In certain circumstances, these models achieved near human level performance. However, few studies adhered to best-practice machine learning guidelines. Second, I developed a dictionary of teachers’ motivational phrases and used it to automatically assess teachers’ motivating and de-motivating behaviours. Results showed that the dictionary ratings of teacher need support achieved a strong correlation with observer ratings of need support (rfull dictionary = .73). Third, I developed a classification of teachers’ motivational behaviour that would enable more advanced automated coding of teacher behaviours at each utterance level. In this study, I created a classification that includes 57 teacher motivating and de-motivating behaviours that are consistent with self-determination theory. Automatically assessing teachers’ motivational behaviour with automatic coding methods can provide accurate, fast pace, and large scale analysis of teacher motivational behaviour. This could allow for immediate feedback and also development of theoretical frameworks. The findings in this thesis can lead to the improvement of student motivation and other consequent student outcomes.
Multirhythmicity in an optoelectronic oscillator with large delay
Creators: name: Weicker, Lionel
name: Erneux, Thomas
name: Rosin, David P.
name: Gauthier, Daniel J.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: An optoelectronic oscillator exhibiting a large delay in its feedback loop is studied both experimentally and theoretically. We show that multiple square-wave oscillations may coexist for the same values of the parameters (multirhythmicity). Depending on the sign of the phase shift, these regimes admit either periods close to an integer fraction of the delay or periods close to an odd integer fraction of twice the delay. These periodic solutions emerge from successive Hopf bifurcation points and stabilize at a finite amplitude following a scenario similar to Eckhaus instability in spatially extended systems. We find quantitative agreements between experiments and numerical simulations. The linear stability of the square-waves is substantiated analytically by determining stable fixed points of a map.
description: 14 pages, 7 figures
Symmetry-protected topological phases and transition in a frustrated spin-$\frac{1}{2}$ XXZ chain
Creators: name: Ueda, Hiroshi
name: Onoda, Shigeki
Publisher: name: arXiv
Year: 2014
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Frustrated spin-$1/2$ XXZ zigzag chains relevant to Rb$_2$Cu$_2$Mo$_3$O$_{12}$ are revisited in the light of symmetry-protected topological (SPT) phases. Using a density-matrix renormalization group method for infinite systems, we identify projective representations for four distinct time-reversal invariant SPT phases; two parity-symmetric dimer phases near the Heisenberg and XX limits and two parity-broken vector-chiral (VC) dimer phases in between. A small bond alternation in the nearest-neighbor ferromagnetic exchange coupling induces a direct SPT transition between the two distinct VC dimer phases. It is also found numerically that two Berezinskii-Kosterlitz-Thouless transitions from the gapless to the two distinct gapped VC phases meet each other at a Gaussian criticality of the same Tomonaga-Luttinger parameter value as in the SU(2)-symmetric case.
description: 6 pages, 2 figures, 1 table
title: Lehrpersonen in Sorge um den Religionsunterricht
Creators: name: Kalis, Wiktoria Maria
Year: 2021

description: Die Bedeutsamkeit des katholischen Religionsunterrichts sowie seine (mono)konfessionelle Ausrichtung werden seit geraumer Zeit aufgrund der gesellschaftlichen und kulturellen Pluralität in Frage gestellt und so wird mancherseits ein bloß religionskundlicher Unterricht für alle Schüler*innen gefordert. Diese Masterarbeit beschäftigt sich einerseits mit den damit in Zusammenhang stehenden Sorgen von Religionslehrkräften der Erzdiözese Wien, die im September 2018 erhoben worden sind. Andererseits werden zwei im aktuellen religionspädagogischen Diskurs verhandelte Formen eines zukunftsfähigen konfessionellen (katholischen) Religionsunterrichts skizziert. Dabei sollen die mithilfe der qualitativen Inhaltsanalyse herausgearbeiteten Sorgen der Lehrpersonen als Reflexionsfolie für die beschriebenen Konzepte dienen, um untersuchen zu können, ob diese beiden Aspekte miteinander korrelieren oder ob eine Kluft zwischen Theorie und Praxis gegeben ist.
description: The significance of catholic religious education as well as its (mono)confessional orientation have been questioned for a considerable time due to social and cultural plurality and thus some people demand a neutral religious education for all students. On the one hand, this master’s thesis deals with the concerns of teachers of religious education in the Archdiocese of Vienna, which are related to these problems and were surveyed in September 2018. On the other hand, two forms of a sustainable confessional (catholic) religious education, that are discussed in the current religious education discourse, are outlined. In doing so, the concerns of the teachers, which were identified with the help of qualitative content analysis, will serve as a reflection foil for the described concepts in order to be able to investigate whether these two aspects correlate with each other or whether there is a gap between theory and practice.
Celebrating Deviation: Introducing Markup Options for Variant Japanese Phonetic Characters known as Hentaigana
Creators: name: McGaughey, Hanna
Publisher: name: Zenodo
Year: 2022
Subjects: Japanese Texts
Premodern Script
Variant Characters
Hentaigana
Kyūjitai
TEI
XML

description: In digitalizing the manuscript heritage of secret writings by the Japanese 15th century actor, playwright, producer, and teacher Zeami, I am including the premodern script variations known as hentaigana now available in Unicode. Hentaigana are variant hiragana, phonetic characters that are used to write various Japanese grammatical and function words and often ruby, for which the TEI released elements last year. In 2017, Unicode formally added 285 hentaigana characters in their Kana Supplement and Kana Extended-A code charts. These alternatives are fluid or cursive abbreviations of various “parent characters,” phonetically used Chinese characters (kanji), with varying patterns and degrees of simplification. In encoding both the modern, standardized hiragana and hentaigana, this project makes the manuscripts more accessible to learners of Japanese premodern script. Comparisons of the variants in different text witnesses using such markup might be useful for future analyses of text genealogy. In this poster, I will present my methods for systematically including hentaigana developed while transcribing manuscript witnesses of Zeami’s writings and explain my inclusion of the “old character forms” (kyūjitai) of kanji using similar markup. I will furthermore share initial orthographical explorations of texts encoded thus far and consider methods for sharing the project with digitally savvy users, noh theater experts with no IT background, and educated non-specialists.
description: With logistical and financial support from the Alexander von Humboldt Foundation, the Japanese Society for the Promotion of Science (JSPS), and KAKENHI. My sincere thanks to Prof. Yamanaka Reiko and Li Suyang at the Nogami Memorial Hosei University Noh Theatre Research Institute for their support and contribution, and to Luka and Daniel Slane for their love and understanding.
The power spectrum and bispectrum of SDSS DR11 BOSS galaxies II: cosmological interpretation
Creators: name: Gil-Marín, Héctor
name: Verde, Licia
name: Noreña, Jorge
name: Cuesta, Antonio J.
name: Samushia, Lado
name: Percival, Will J.
name: Wagner, Christian
name: Manera, Marc
name: Schneider, Donald P.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We examine the cosmological implications of the measurements of the linear growth rate of cosmological structure obtained in a companion paper from the power spectrum and bispectrum monopoles of the Sloan Digital Sky Survey III Baryon Oscillation Spectroscopic Survey Data, Release 11, CMASS galaxies. This measurement was of $f^{0.43}σ_8$, where $σ_8$ is the amplitude of dark matter density fluctuations, and $f$ is the linear growth rate, at the effective redshift of the survey, $z_{\rm eff}=0.57$. In conjunction with Cosmic Microwave Background (CMB) data, interesting constraints can be placed on models with non-standard neutrino properties and models where gravity deviates from general relativity on cosmological scales. In particular, the sum of the masses of the three species of the neutrinos is constrained to $m_ν<0.49\,{\rm eV}$ (at 95\% confidence level) when the $f^{0.43}σ_8$ measurement is combined with state-of-the-art CMB measurements. Allowing the effective number of neutrinos to vary as a free parameter does not significantly change these results. When we combine the measurement of $f^{0.43}σ_8$ with the complementary measurement of $fσ_8$ from the monopole and quadrupole of the two-point correlation function we are able to obtain an independent measurements of $f$ and $σ_8$. We obtain $f=0.63\pm0.16$ and $σ_8=0.710\pm0.086$ (68\% confidence level). This is the first time when these parameters have been able to be measured independently using the redshift-space power spectrum and bispectrum measurements from galaxy clustering data only.
description: 9 pages, 5 figures, 1 table. Accepted for publication in MNRAS
Lettura Codici da Timbratrice nel Sistema di Gestione delle Presenze
Creators: name: Marco, Canaparo
name: Barbara, Demin
Publisher: name: INFN Open Access Repository
Year: 2023
Subjects: Sistema Gestione Presenze

description: Questo documento descrive l'attività svolta per permettere al Sistema di Gestione delle Presenze INFN di leggere i codici digitati nel marcatempo. Questa funzionalità non era stata prevista nel Sistema Presenze quando era gestito da un'azienda esterna, e quindi è stata interamente implementata dal personale della Direzione Sistemi Informativi. In sostanza, le specifiche richiedevano che il software leggesse un codice inserito nel marcatempo quando il badge veniva passato e creasse il giustificativo corrispondente nel
 cartellino, come se fosse stato inserito dalla pagina web.
 L'attività è stata completata nel 2018 e viene utilizzata da alcune strutture abilitate.
Minimal anomaly-free chiral fermion sets and gauge coupling unification
Creators: name: Cebola, Luis M.
name: Emmanuel-Costa, D.
name: Felipe, R. Gonzalez
name: Simoes, C.
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We look for minimal chiral sets of fermions beyond the standard model that are anomaly free and, simultaneously, vectorlike particles with respect to colour SU(3) and electromagnetic U(1). We then study whether the addition of such particles to the standard model particle content allows for the unification of gauge couplings at a high energy scale, above $5.0 \times 10^{15}$ GeV so as to be safely consistent with proton decay bounds. The possibility to have unification at the string scale is also considered. Inspired in grand unified theories, we also search for minimal chiral fermion sets that belong to SU(5) multiplets. Restricting to representations up to dimension 50, we show that some of these sets can lead to gauge unification at the GUT and/or string scales.
description: 13 pages, 5 figures, 8 tables; Comments and references added, final version to appear in Phys. Rev. D
Prethermalization of atoms due to photon-mediated long-range interactions
Creators: name: Schütz, Stefan
name: Morigi, Giovanna
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Atoms can spontaneously form spatially-ordered structures in optical resonators when they are transversally driven by lasers. This occurs when the laser intensity exceeds a threshold value and results from the mechanical forces on the atoms associated with superradiant scattering into the cavity mode. We treat the atomic motion semiclassically and show that, while the onset of spatial ordering depends on the intracavity-photon number, the stationary momentum distribution is a Maxwell-Boltzmann whose width is determined by the rate of photon losses. Above threshold, the dynamics is characterized by two time scales: after a violent relaxation, the system slowly reaches the stationary state over time scales exceeding the cavity lifetime by several orders of magnitude. In this transient regime the atomic momenta form non-Gaussian metastable distributions, which emerge from the interplay between the long-range dispersive and dissipative mechanical forces of light. We argue that the dynamics of selforganization of atoms in cavities offers a testbed for studying the statistical mechanics of long-range interacting systems.
description: 5 pages, 3 figures, to appear in Phys. Rev. Lett