cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Digital Metasurface Based on Graphene: An Application to Beam Steering in Terahertz Plasmonic Antennas
Creators: name: Hosseininejad, Seyed Ehsan
name: Rouhi, Kasra
name: Neshat, Mohammad
name: Cabellos-Aparicio, Albert
name: Abadal, Sergi
name: Alarcón, Eduard
Publisher: name: arXiv
Year: 2020
Subjects: subject: Applied Physics (physics.app-ph)
subject: Emerging Technologies (cs.ET)
subject: Optics (physics.optics)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Metasurfaces, the two-dimensional counterpart of metamaterials, have caught great attention thanks to their powerful capabilities on manipulation of electromagnetic waves. Recent times have seen the emergence of a variety of metasurfaces exhibiting not only countless functionalities, but also a reconfigurable response. Additionally, digital or coding metasurfaces have revolutionized the field by describing the device as a matrix of discrete building block states, thus drawing clear parallelisms with information theory and opening new ways to model, compose, and (re)program advanced metasurfaces. This paper joins the reconfigurable and digital approaches, and presents a metasurface that leverages the tunability of graphene to perform beam steering at terahertz frequencies. A comprehensive design methodology is presented encompassing technological, unit cell design, digital metamaterial synthesis, and programmability aspects. By setting up and dynamically adjusting a phase gradient along the metasurface plane, the resulting device achieves beam steering at all practical directions. The proposed design is studied through analytical models and validated numerically, showing beam widths and steering errors well below 10 degrees and 5% in most cases. Finally, design guidelines are extracted through a scalability analysis involving the metasurface size and number of unit cell states.
description: 12 pages
Time Discretization From Noncommutativity
Creators: name: Lizzi, Fedele
name: Vitale, Patrizia
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: Quantum Algebra (math.QA)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We show that a particular noncommutative geometry, sometimes called angular or $ρ$-Minkowski, requires that the spectrum of time be discrete. In this noncommutative space the time variable is not commuting with the angular variable in cylindrical coordinates. The possible values that the variable can take go from minus infinity to plus infinity, equally spaced by the scale of noncommmutativity. Possible self-adjoint extensions of the "time operator" are discussed. They give that a measurement of time can be any real value, but time intervals are still quantized.
description: 13 pages, one figure. Substantially enlarged with references added
Attempts on the Land
Creators: name: Espinoza, Braulio
name: Mixco, Mauricio J.
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2021
Subjects: subject: klb

description: See Kiliwa Texts: "When I have Donned My Crest of Stars" (University of Utah Press, 1983), p. 198 for transcription, segmentation, glossing, and translation of this story.
Intra-night optical variability of $γ-$ray detected narrow-line Seyfert 1 galaxies
Creators: name: Ojha, Vineet
name: Chand, Hum
name: Gopal-Krishna
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We report the first attempt to systematically characterise intra-night optical variability (INOV) of the rare and enigmatic subset of Narrow-Line Seyfert1 galaxies (NLSy1s), which is marked by detection in the $γ$-ray band and is therefore endowed with Doppler boosted relativistic jets, like blazars. However, the central engines in these two types of AGN are thought to operate in different regimes of accretion rate. Our INOV search in a fairly large and unbiased sample of 15 $γ$-ray NLSy1s was conducted in 36 monitoring sessions, each lasting $\geq$ 3 hrs. In our analysis, special care has been taken to address the possible effect on the differential light curves, of any variation in the seeing disc during the session, since that might lead to spurious claims of INOV from such AGN due to the possibility of a significant contribution from the host galaxy to the total optical emission. From our observations, a duty cycle (DC) of INOV detection in the $γ$-ray NLSy1s is estimated to be around 25% - 30%, which is comparable to that known for blazars. This estimate of DC will probably need an upward revision, once it becomes possible to correct for the dilution of the AGN's nonthermal optical emission by the (much steadier) optical emission contributed not only by the host galaxy but also the nuclear accretion disc in these high Eddington rate accretors. Finally, we also draw attention to the possibility that sharp optical flux changes on sub-hour time scale are less rare for $γ$-ray NLSy1s, in comparison to blazars.
description: 15 pages, 4 figures, accepted for publication in MNRAS
Verification of an analytical hysteresis model for dowel-type timber connections using shake table tests
Creators: name: Wong, Ernie Y.
Publisher: name: University of British Columbia
Year: 2009

description: The purpose of this study was to verify the analytical results of a non-linear finite-element model for predicting the seismic response of ductile dowel type moment-resisting connections. The analytical model, FRAME, is based on each dowel modelled as an elasto-plastic beam in a non-linear medium, thus allowing the formation of gaps between the beam and the medium. The model calculates the response using basic stress/strain information of the connector and the surrounding medium. The advantage of using basic material properties is that the model can automatically adjust to any connection configuration and input history. To validate the results of the analytical model, four test specimens were built and tested on the UBC Earthquake Engineering Shake Table. The objective was to assess the analytical model, to see if its results could accurately simulate the response of connections subjected to different earthquakes and with different configurations. The specimens were made from parallel strand lumber (Parallam®), connected to the shake table by steel plates and tight-fitting mild steel dowels. A mass was placed on top of the column to simulate building loads. A Northridge(1994) and a Kobe(1995) earthquake record were used in this experiment. The relative displacements at the top and bottom of the column were obtained from the tests and used to verify the results from the analytical model. The basic material properties used in the analytical model were obtained through wood bearing tests on the Parallam® and tensile yield tests on the steel dowels. The comparison of the experimental results with the analytical predictions from FRAME showed that FRAME can accurately model the seismic response of ductile dowel-type timber connections. Of particular importance was the fact that FRAME is able to adapt to different connection configurations and different excitation signals.
Self-interactions in a topological BF-type model in D=5
Creators: name: Cioroianu, E. M.
name: Sararu, S. C.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: All consistent interactions in five spacetime dimensions that can be added to a free BF-type model involving one scalar field, two types of one-forms, two sorts of two-forms, and one three-form are investigated by means of deforming the solution to the master equation with the help of specific cohomological techniques. The couplings are obtained on the grounds of smoothness, locality, (background) Lorentz invariance, Poincaré invariance, and the preservation of the number of derivatives on each field.
description: LaTeX, 57 pages, final version, matching the published paper
Kakeya sets of curves
Creators: name: Wisewell, Laura
Publisher: name: arXiv
Year: 2005
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics
subject: 42B25

description: We investigate analogues for curves of the Kakeya problem for straight lines. These arise from H"ormander-type oscillatory integrals in the same way as the straight line case comes from the restriction and Bochner-Riesz problems. Using some of the geometric and arithmetic techniques developed for the straight line case by Bourgain, Wolff, Katz and Tao, we are able to prove positive results for families of parabolas whose coefficients satisfy certain algebraic conditions.
description: 32 pages. To appear in GAFA
Inelastic Interaction Corrections and Universal Relations for Full Counting Statistics
Creators: name: Tobiska, J.
name: Nazarov, Yu. V.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We analyze in detail the interaction correction to Full Counting Statistics (FCS) of electron transfer in a quantum contact originating from the electromagnetic environment surrounding the contact. The correction can be presented as a sum of two terms, corresponding to elastic/inelastic electron transfer. Here we primarily focus on the inelastic correction. For our analysis, it is important to understand more general -- universal -- relations imposed on FCS only by quantum mechanics and statistics with no regard for a concrete realization of a contact. So we derive and analyze these relations. We reveal that for FCS the universal relations can be presented in a form of detailed balance. We also present several useful formulas for the cumulants. To facilitate the experimental observation of the effect, we evaluate cumulants of FCS at finite voltage and temperature. Several analytical results obtained are supplemented by numerical calculations for the first three cumulants at various transmission eigenvalues.
description: 10 pages, 3 figures
Theory of competitive counterion adsorption on flexible polyelectrolytes : Divalent salts
Creators: name: Kundagrami, Arindam
name: Muthukumar, M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Counterion distribution around an isolated flexible polyelectrolyte in the presence of a divalent salt is evaluated using the adsorption model [M. Muthukumar, J. Chem. Phys. {\bf 120}, 9343 (2004)] that considers Bjerrum length, salt concentration, and local dielectric heterogeneity as physical variables in the system. Self consistent calculations of effective charge and size of polymer show that divalent counterions replace condensed monovalent counterions in competitive adsorption. The theory further predicts that at modest physical conditions, polymer charge is compensated and reversed with increasing divalent salt. Consequently, the polyelectrolyte collapses and reswells, respectively. Lower temperatures and higher degrees of dielectric heterogeneity enhance condensation of all species of ions. Complete diagram of states for the effective charge calculated as functions of Coulomb strength and salt concentration suggest that (a) overcharging requires a minimum Coulomb strenth, and (b) progressively higher presence of salt recharges the polymer due to either electrostatic screening (low Coulomb strength) or negative coion condensation (high Coulomb strength). A simple theory of ion-bridging is also presented which predicts a first-order collapse of polyelectrolytes. The theoretical predictions are in agreement with generic results from experiments and simulations.
description: 30 double-spaced pages (JCP type) and 12 figures
An analytic physically motivated model of the mammalian cochlea
Creators: name: Alkhairy, Samiya A
name: Shera, Christopher A
Publisher: name: arXiv
Year: 2020
Subjects: subject: Tissues and Organs (q-bio.TO)
subject: Sound (cs.SD)
subject: Audio and Speech Processing (eess.AS)
subject: Signal Processing (eess.SP)
subject: Neurons and Cognition (q-bio.NC)
subject: FOS: Biological sciences
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: We develop an analytic model of the mammalian cochlea. We use a mixed physical-phenomenological approach by utilizing existing work on the physics of classical box-representations of the cochlea, and behavior of recent data-derived wavenumber estimates. Spatial variation is incorporated through a single independent variable that combines space and frequency. We arrive at closed-form expressions for the organ of Corti velocity, its impedance, the pressure difference across the organ of Corti, and its wavenumber. We perform model tests using real and imaginary parts of chinchilla data from multiple locations and for multiple variables. The model also predicts impedances that are qualitatively consistent with current literature. For implementation, the model can leverage existing efforts for both filter bank and filter cascade models that target improved algorithmic or analog circuit efficiencies. The simplicity of the cochlear model, its small number of model constants, its ability to capture the variation of tuning, its closed-form expressions for physically-interrelated variables, and the form of these expressions that allows for easily determining one variable from another make the model appropriate for analytic and digital auditory filter implementations as discussed here, as well as for extracting macromechanical insights regarding how the cochlea works.
description: 17 pages, 12 figures. Published in JASA
All-optical linear polarization engineering in single and coupled exciton-polariton condensates
Creators: name: Gnusov, I.
name: Sigurdsson, H.
name: Toepfer, J.
name: Baryshev, S.
name: Alyatkin, S.
name: Lagoudakis, P.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We demonstrate all-optical linear polarization control of exciton-polariton condensates in anisotropic elliptical optical traps. The cavity inherent TE-TM splitting lifts the ground state spin degeneracy with emerging fine structure modes polarized linear parallel and perpendicular to the trap major axis with the condensate populating the latter. Our findings show a new type of polarization control with exciting perspectives in both spinoptronics and studies on extended systems of interacting nonlinear optical elements with anisotropic coupling strength and adjustable fine structure.
A terrestrial-mass rogue planet candidate detected in the shortest-timescale microlensing event
Creators: name: Mroz, P.
name: Poleski, R.
name: Gould, A.
name: Udalski, A.
name: Sumi, T.
name: Szymanski, M. K.
name: Soszynski, I.
name: Pietrukowicz, P.
name: Kozlowski, S.
name: Skowron, J.
name: Ulaczyk, K.
name: Albrow, M. D.
name: Chung, S. -J.
name: Han, C.
name: Hwang, K. -H.
name: Jung, Y. K.
name: Kim, H. -W.
name: Ryu, Y. -H.
name: Shin, I. -G.
name: Shvartzvald, Y.
name: Yee, J. C.
name: Zang, W.
name: Cha, S. -M.
name: Kim, D. -J.
name: Kim, S. -L.
name: Lee, C. -U.
name: Lee, D. -J.
name: Lee, Y.
name: Park, B. -G.
name: Pogge, R. W.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Some low-mass planets are expected to be ejected from their parent planetary systems during early stages of planetary system formation. According to planet-formation theories, such as the core accretion theory, typical masses of ejected planets should be between 0.3 and 1.0 $M_{\oplus}$. Although in practice such objects do not emit any light, they may be detected using gravitational microlensing via their light-bending gravity. Microlensing events due to terrestrial-mass rogue planets are expected to have extremely small angular Einstein radii (< 1 uas) and extremely short timescales (< 0.1 day). Here, we present the discovery of the shortest-timescale microlensing event, OGLE-2016-BLG-1928, identified to date ($t_{\rm E} \approx 0.0288\ \mathrm{day} = 41.5 \mathrm{min}$). Thanks to the detection of finite-source effects in the light curve of the event, we were able to measure the angular Einstein radius of the lens $θ_{\rm E} = 0.842 \pm 0.064$ uas, making the event the most extreme short-timescale microlens discovered to date. Depending on its unknown distance, the lens may be a Mars- to Earth-mass object, with the former possibility favored by the Gaia proper motion measurement of the source. The planet may be orbiting a star but we rule out the presence of stellar companions up to the projected distance of 8.0 au from the planet. Our discovery demonstrates that terrestrial-mass free-floating planets can be detected and characterized using microlensing.
description: accepted for publication in ApJ Letters, minor changes
Conflict with a Relative
Creators: name: Espinoza, Braulio
name: Mixco, Mauricio J.
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2021
Subjects: subject: klb

description: See Kiliwa Texts: “When I have Donned My Crest of Stars” (University of Utah Press, 1983), p. 236 for transcription, segmentation, glossing, and translation of this story.
Adiabatic cross-polarization via intermediate dipolar-ordered state
Creators: name: Lee, Jae-Seung
name: Khitrin, A. K.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: It is experimentally demonstrated that an adiabatic demagnetization - remagnetization scheme, where the Zeeman order of abundant nuclei is first adiabatically converted into the dipolar order, and then, into the Zeeman order of rare nuclei, can significantly increase polarization of rare nuclei compared to the conventional cross-polarization technique.
description: 4 pages, 2 figures
Code of Behavior; Kiliwas and Discrimination
Creators: name: Espinoza, Braulio
name: Mixco, Mauricio J.
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2021
Subjects: subject: klb

description: See Kiliwa Texts: "When I have Donned My Crest of Stars" (University of Utah Press, 1983), pp. 157 and 196 for transcription, segmentation, glossing, and translation of these stories, respectively.
On de Sitter String Vacua from Anti-D3-Branes in the Large Volume Scenario
Creators: name: Crinò, Chiara
name: Quevedo, Fernando
name: Valandro, Roberto
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider de Sitter vacua realised in concrete type IIB Calabi-Yau compactifications with an anti D3-brane at the tip of a warped throat of Klebanov-Strassler type. The Kähler moduli are stabilised together with the complex structure modulus of the warped throat. The volume is exponentially large as in the large volume scenario (LVS). We analyse the conditions on the parameters of the EFT such that they are in the region of validity of our approximations, there are no runaway problems and the vacua satisfy all consistency constraints, such as tadpole cancellation. We illustrate our results with an explicit Calabi-Yau orientifold with two Kähler moduli and one antibrane on top of an O3-plane in a warped throat, that has the goldstino as its only massless state. The moduli are stabilised with $g_s\sim 0.2$ and volume $\mathcal{V}\sim 10^4$ in string units, justifying the approximation used to derive the corresponding EFT. Although the model lacks chiral matter, it is presented as a proof of concept, chosen to be the simplest realisation of antibrane uplift.
description: 32 pages, 2 figures
Die Plenartagung der Kommission für Glauben und Kirchenverfassung in Budapest, 9. bis 21. August 1989
Creators: name: Ritschl, Dietrich
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 38 Nr. 4 (1989): Ökumenische Rundschau, Band 38, Heft 4
Star Formation and AGN in the Core of the Shapley Supercluster: A VLA Survey of A3556, A3558, SC1327-312, SC1329-313, and A3562
Creators: name: Miller, Neal A.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The core of the Shapley supercluster (A3556, A3558, SC1327-312, SC1329-313, and A3562) is an ideal region in which to study the effects of cluster mergers on the activity of individual galaxies. This paper presents the most comprehensive radio continuum investigation of the region, relying on a 63-pointing mosaic obtained with the Very Large Array yielding an areal coverage of nearly 7 square degrees. The mosaic provides a typical sensitivity of about 80 uJy at a resolution of 16", enabling detection of galaxies with star formation rates as low as 1 solar mass per year. The radio data are complemented by optical imaging in B and R, producing a catalog of 210 radio-detected galaxies with m_R <= 17.36 (M_R <= -19). At least 104 of these radio-detected galaxies are members of the supercluster on the basis of public velocity measurements. Across the entire core of the supercluster, there appears to be a significant deficit of radio galaxies at intermediate optical magnitudes (M_R between -21 and -22). This deficit is offset somewhat by an increase in the frequency with which brighter galaxies (M_R less than -22) host radio sources. More dramatic is the highly significant increase in the probability for fainter galaxies (M_R between -20 and -21) in the vicinity of A3562 and SC1329-313 to be associated with radio emission. The radio and optical data for these sources strongly suggest that these active galaxies are powered by star formation. In conjunction with recent X-ray analysis, this is interpreted as young starbursts related to the recent merger of SC1329-313 with A3562 and the rest of the supercluster.
description: Accepted by AJ; 50 pages, including 16 figures (for full resolution PDF, see http://mywebpages.comcast.net/nealamiller2/Shapley_pp.pdf)
Branching Fraction and CP Asymmetries of $B^0 \to K^0_S K^0_S K^0_S$
Creators: name: The BABAR Collaboration
name: Aubert, B.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We present measurements of the branching fraction and time-dependent CP-violating asymmetries in $B^0 \to K^0_s K^0_s K^0_s$ decays based on 227 million $Υ(4S) \to B \bar{B}$ decays collected with the BaBar detector at the PEP-II asymmetric-energy $B$ Factory at SLAC. We obtain a branching fraction of $(6.9^{+0.9}_{-0.8}\pm 0.6)\times 10^{-6},$ and CP asymmetries $C = -0.34^{+0.28}_{-0.25} \pm 0.05$ and $S = -0.71^{+0.38}_{-0.32} \pm 0.04,$ where the first uncertainties are statistical and the second systematic.
description: 7 pages, 2 postscript figues, submitted to PRL
Harish-Chandra Modules Over the Twisted Heisenberg-Virasoro Algebra
Creators: name: Liu, Dong
name: Jiang, Cuipo
Publisher: name: arXiv
Year: 2008
Subjects: subject: Representation Theory (math.RT)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 17B10, 17B65, 17B68

description: In this paper, we classify all indecomposable Harish-Chandra modules of the intermediate series over the twisted Heisenberg-Virasoro algebra. Meanwhile, some bosonic modules are also studied.
description: Latex, 15 pages
La systématisation grammaticale à l’école primaire hellénique Notions, principes et un réexamen de la méthodologie à partir de deux manuels
Creators: name: Axampanopoulos, Panagiotis
Publisher: name: Journal of Applied Linguistics
Year: 2023

description: Dans cet article, nous nous penchons sur la composante grammaticale du cours de FLE destiné aux élèves de l’école primaire en Grèce et, en particulier, sur l’étape du parcours didactico-méthodologique désignée sous le nom de systématisation des contenus grammaticaux. Malgré les préconisations des spécialistes pour une pédagogie active centrée sur les tâches et l’agir communicationnel des apprenants, une analyse menée sur un échantillon représentatif de deux manuels du primaire fait apparaître un paradoxe : bien que les objectifs d’enseignement y soient formulés selon des critères communicatifs et que les documents supports y soient conçus conformément aux objectifs poursuivis, les auteurs ne semblent voir dans la compétence grammaticale qu’une compétence purement formelle sans préoccupation pour sa mise en œuvre dans le discours. Nous expliquerons la discontinuité qui en découle et la décontextualisation des formes à enseigner qui l’accompagne par les effets que la méthodologie dite globaliste (ou ordinaire) produit sur les manuels grecs. Enfin, nous illustrerons quelques pistes de remédiation possibles visant la modification des démarches méthodologiques existantes en matière de systématisation grammaticale.
description: Journal of Applied Linguistics, Αρ. 36 (2023)
Production of P-wave Charmed Mesons in Hadronic B Decays
Creators: name: Cheng, Hai-Yang
name: Chua, Chun-Khiang
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Production of even-parity charmed mesons in hadronic B decays is studied. Specifically, we focus on the Cabibbo-allowed decays $\bar B\to D^{**}π$ and $\bar D^{**}_sD^{(*)}$, where $D^{**}$ denotes generically a p-wave charmed meson. While the measured color-allowed decays $\bar B^0\to D^{**+}π^-$ are consistent with the theoretical expectation, the experimental observation of $B^-\to D^{**0}π^-$ for the broad $D^{**}$ states is astonishing as it requires that the color-suppressed contribution dominates over the color-allowed one, even though the former is $1/m_b$ suppressed in the heavy quark limit. In order to accommodate the data of $\bar B\to D^{**}π^-$, it is found that $a_2/a_1\approx -0.5$ with a sign opposite to that in $\bar B\to Dπ$ decays, where $a_1$ and $a_2$ are the effective Wilson coefficients for color-allowed and color-suppressed decay amplitudes, respectively. The decay constants and form factors for $D^{**}$ and the Isgur-Wise functions $τ_{1/2}(ω)$ and $τ_{3/2}(ω)$ are extracted from the data of $B\to D^{**}π$ decays. The Isgur-Wise functions calculated in the covariant light-front quark model are in good agreement with experiment. The neutral modes $\bar B^0\to D^{**0}π^0$ for $D^{**}=D^*_0(2400),D'_1(2430)$ and $\bar B^0\to D'^0_1(2430)ω$ are predicted to have branching ratios of order $10^{-4}$ which are also supported by isospin argument. The decay constants of $D_{s0}^*(2317)$ and $D'_{s1}(2460)$ are inferred from the measurements of $\bar B\to D_s^{**-}D$ to be $58\sim 86$ MeV and $130\sim 200$ MeV, respectively. Contrary to the decay constants $f_{D_0^*}$ and $f_{D'_1}$ which are similar in size, the large disparity between $f_{D_{s0}^*}$ and $f_{D'_{s1}}$ is surprising and unexpected.
description: 27 pages; Sec. IV is updated using the absolute branching ratios of B to D_{s1}(2460)D decays obtained by BaBar
Discovery potential of R-hadrons with the ATLAS detector
Creators: name: Kraan, A. C.
name: Hansen, J. B.
name: Nevski, P.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The production of exotic heavy hadronic particles arise in several models for physics beyond the Standard Model. A study of the detection possibilities of new heavy hadron states with the ATLAS detector is presented. The focus is on R-hadrons, which are stable hadronized gluinos, predicted by certain supersymmetric models. Interactions and signatures of single R-hadrons are studied with the ATLAS simulation and reconstruction framework and issues concerning triggering on R-hadron events are addressed. The ATLAS fast simulation framework has been extended to include parameterizations for R-hadrons. Based on topological and kinematic variables only, the discovery potential of the ATLAS detector for R-hadron events produced in pp->g~g~, is studied for masses below 2 TeV/c^2. R-hadrons with masses as predicted by standard SUSY scenarios would be discovered already in the very early stages of the running of the LHC. The discovery reach of heavy gluinos, predicted by for example split supersymmetry models, extends up to at least 1.8 \tevcc for three years running of the LHC at low luminosity.
description: 25 pages, ATLAS Scientific note SN-ATLAS-2005-053
Greek L1 attrition in Germany: Evidence from elicited narratives corpora
Creators: name: Klein, Giacomo
Publisher: name: Journal of Applied Linguistics
Year: 2023

description: Previous research has highlighted lexical, morphological, syntactic, and discourse-level differences between L1 attriters and control groups (e.g. Kaltsa et al., 2015; Pavlenko, 2003; Schmid Jarvis 2014; Sorace, 2011; Tsimpli et al., 2004). This study examines potential indicators of first language (L1) attrition in oral L1 Greek produced by Greek residents in Germany. The experimental group consisted of 66 adult Greeks who had lived in Germany 16.23 years on average and had left Greece after the age of 17. We also included a control group of 31 adult Greeks living in Greece.
All participants were asked to complete a re-telling task and those in the experimental group also answered questions about their life in Germany. The recorded narratives were transcribed, normalized, and analyzed quantitatively and qualitatively. We discuss our findings with respect to possible attrition in lexis, aspect, syntax and discourse phenomena.
description: Journal of Applied Linguistics, Αρ. 36 (2023)
Charge-stripe Fluctuations in Nd$_{4}$Ni$_{3}$O$_{8}$ as Evidenced by Optical Spectroscopy
Creators: name: Hao, Jiahao
name: Fan, Xinwei
name: Li, Qing
name: Zhou, Xiaoxiang
name: He, Chengping
name: Dai, Yaomin
name: Xu, Bing
name: Zhu, Xiyu
name: Wen, Hai-Hu
Publisher: name: arXiv
Year: 2021
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We present an investigation into the optical properties of Nd$_{4}$Ni$_{3}$O$_{8}$ at different temperatures from 300 down to 5~K over a broad frequency range. The optical conductivity at 5~K is decomposed into IR-active phonons, a far-infrared band $α$, a mid-infrared band $β$, and a high-energy absorption edge. By comparing the measured optical conductivity to first-principles calculations and the optical response of other nickelates, we find that Nd$_{4}$Ni$_{3}$O$_{8}$ features evident charge-stripe fluctuations. The $β$ band is attributed to electronic transitions between the gapped Ni-$d_{x^2-y^2}$ bands due to fluctuating charge stripes, while the high-frequency absorption edge corresponds to the onset of transitions involving other high-energy bands. Furthermore, an analysis of the temperature-dependent optical spectral weight reveals a $T^{2}$ law, which is likely to originate from strong correlation effects.
description: 8 pages, 6 figures
Luminous Red Nova AT 2019zhd, a new merger in M 31
Creators: name: Pastorello, A.
name: Fraser, M.
name: Valerin, G.
name: Reguitti, A.
name: Itagaki, K.
name: Ochner, P.
name: Williams, S. C.
name: Jones, D.
name: Munday, J.
name: Smartt, S. J.
name: Smith, K. W.
name: Srivastav, S.
name: Elias-Rosa, N.
name: Kankare, E.
name: Karamehmetoglu, E.
name: Lundqvist, P.
name: Mazzali, P. A.
name: Munari, U.
name: Stritzinger, M. D.
name: Tomasella, L.
name: Anderson, J. P.
name: Chambers, K. C.
name: Rest, A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present the follow-up campaign of the luminous red nova (LRN) AT~2019zhd, the third event of this class observed in M 31. The object was followed by several sky surveys for about five months before the outburst, during which it showed a slow luminosity rise. In this phase, the absolute magnitude ranged from M_r=-2.8+-0.2 mag to M_r=-5.6+-0.1 mag. Then, over a four-five day period, AT 2019zhd experienced a major brightening, reaching at peak M_r=-9.61+-0.08 mag, and an optical luminosity of 1.4x10^39 erg/s. After a fast decline, the light curve settled onto a short-duration plateau in the red bands. Although less pronounced, this feature is reminiscent of the second red maximum observed in other LRNe. This phase was followed by a rapid linear decline in all bands. At maximum, the spectra show a blue continuum with prominent Balmer emission lines. The post-maximum spectra show a much redder continuum, resembling that of an intermediate-type star. In this phase, Halpha becomes very weak, Hbeta is no longer detectable and a forest of narrow absorption metal lines now dominate the spectrum. The latest spectra, obtained during the post-plateau decline, show a very red continuum (T_eff ~ 3000 K) with broad molecular bands of TiO, similar to those of M-type stars. The long-lasting, slow photometric rise observed before the peak resembles that of LRN V1309 Sco, which was interpreted as the signature of the common-envelope ejection. The subsequent outburst is likely due to the gas outflow following a stellar merging event. The inspection of archival HST images taken 22 years before the LRN discovery reveals a faint red source (M_F555W=0.21+-0.14 mag, with F555W-F814W = 2.96+-0.12 mag) at the position of AT 2019zhd, which is the most likely quiescent precursor. The source is consistent with expectations for a binary system including a predominant M5-type star.
description: 17 pages, 10 figures, 3 tables. Accepted for publication in A&A
The Greek and German narrative micro-structure of heritage speakers: A corpus study
Creators: name: Paspali, Anastasia
Publisher: name: Journal of Applied Linguistics
Year: 2023

description: Narratives have been extensively used as a tool to investigate language development in various populations, such as children and second language learners. However, the narrative abilities of heritage populations remain underexplored, and the body of work especially in heritage adults is very limited. The present study explores the micro-structure of spoken narratives (i.e., number of words and clauses, lexical diversity, subordination, and conjunctions) produced by adult Greek-German heritage bilinguals residing in Germany and compares them with the monolingual groups. Additionally, the study explores the narrative performance between the heritage and the majority language of the heritage group with the aim to explore the same/different patterns they follow in each language as well as individual variation (i.e., working memory). The results show that heritage adults exhibit both similarities and differences compared to monolinguals, with differences being more prominent in the heritage language, while working memory modulates narration length and syntactic complexity.
description: Journal of Applied Linguistics, Αρ. 36 (2023)
Motivation as a Consultant; Advice to Youth
Creators: name: Espinoza, Braulio
name: Mixco, Mauricio J.
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2021
Subjects: subject: klb

description: See Kiliwa Texts: "When I have Donned My Crest of Stars" (University of Utah Press, 1983), pp. 257 and 151 for transcription, segmentation, glossing, and translation of these stories, respectively.
title: Thermal management and humidity based prognostics of high-power LED packages
Creators: name: Law, Thong Kok
Publisher: name: University of Glasgow
Year: 2019
Subjects: subject: Light emitting diodes, photonics, reliability engineering, thermal sciences.

description: While Light Emitting Diodes (LEDs) hold much potential as the future of lighting, the high junction temperatures generated during usage result in higher than expected degradation rates and premature failures ahead of the expected lifetime. This problem is especially under-addressed under conditions of high humidity, where there has been limited studies and standards to manage humidity based usage. This research provides an analysis of the factors that contribute to high junction temperatures and suggests prognostic techniques to aid in LED thermal management, specifically under humidity stress. First, this research investigates the effects of current, temperature and humidity on the electrical-optical-thermal (EOT) properties. Temperature rises within an LED because of input stressors which cause heat to build up: the input current, the operating and ambient temperature, and the relative humidity of the environment. Not only is there an accumulation of heat due to these factors that alter the thermal properties, but the electrical and optical characteristics are changed as well. By uncovering specific configurations causing the EOT performance to degrade under stress, better thermal management techniques can be employed. Second, this research proceeds to quantitatively link the EOT performance degradation to the humidity causal factor. The recent proliferation of LED usage in regions with high humidity has not corresponded with sufficient studies and standards governing LED test and usage under the humidity stressor. This has led to indeterminate use and consequentially, a lack of understanding of humidity based failures. A novel humidity based degradation model (HBDM) is successfully developed to gauge the impact of the humidity stressor by means of an index which is shown to be an effective predictor of colour degradation. This prognostication of the colour shift by the HBDM provides both academia and industry not only with an indicator of the physical degradation but also an assessment of the LED yellow-blue colour rendering stability, a critical application criterion. Using the HBDM parameters as indicators of the state of the LED, the degradation study is expanded in the development of a Distance Measure approach to isolate degraded samples exceeding a specified multivariate boundary. The HBDM and Distance Measure approach serve as powerful prognostic techniques in overall LED thermal management.
Classification of smooth affine spherical varieties
Creators: name: Knop, Friedrich
name: Van Steirteghem, Bart
Publisher: name: arXiv
Year: 2005
Subjects: subject: Algebraic Geometry (math.AG)
subject: Representation Theory (math.RT)
subject: Symplectic Geometry (math.SG)
subject: FOS: Mathematics
subject: 14L30

description: Let G be a complex reductive group. A normal G-variety X is called spherical if a Borel subgroup of G has a dense orbit in X. Of particular interest are spherical varieties which are smooth and affine since they form local models for multiplicity free Hamiltonian K-manifolds, K a maximal compact subgroup of G. In this paper, we classify all smooth affine spherical varieties up to coverings, central tori, and C*-fibrations.
description: v1: 23 pages, uses texdraw; v2: 25 pages, introduction updated, Lemma 7.2 fixed, references added, typos corrected
Greek Learner Corpus II (GLCII): Design and development of an online corpus for L2 Greek
Creators: name: Tantos, Alexandros
name: Amvrazis, Nikolaos
name: Drakonaki, Chrysi-Eleni
Publisher: name: Journal of Applied Linguistics
Year: 2023

description: This paper presents an error-annotated learner corpus, the Greek Learner Corpus II (GLCII). GLCII responds to the need for representational data of less spoken and taught languages that will support research on Greek as a second (L2) or foreign language (FL). To this aim, the GLCII includes both written and spoken learners’ productions from a range of genres accompanied with metadata relevant to L2/FL teaching and acquisition. GLCII has drawn on practices and current trends in corpus construction when adopting specific design criteria to ensure its originality, suitability, and availability as a language resource (Brezina, 2018; Tracy-Ventura et al., 2021). Currently, the GLCII is the largest online, freely available, Learner Corpus (LC) of L2 Greek, compiled within the framework of the research project Latent Aspects in L2 Acquisition (LAL2A).
description: Journal of Applied Linguistics, Αρ. 36 (2023)
A Comprehensive Comparison of End-to-End Approaches for Handwritten Digit String Recognition
Creators: name: Hochuli, Andre G.
name: Britto, Alceu S.
name: Saji, David A.
name: Saavedra, Jose M.
name: Sabourin, Robert
name: Oliveira, Luiz S.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Over the last decades, most approaches proposed for handwritten digit string recognition (HDSR) have resorted to digit segmentation, which is dominated by heuristics, thereby imposing substantial constraints on the final performance. Few of them have been based on segmentation-free strategies where each pixel column has a potential cut location. Recently, segmentation-free strategies has added another perspective to the problem, leading to promising results. However, these strategies still show some limitations when dealing with a large number of touching digits. To bridge the resulting gap, in this paper, we hypothesize that a string of digits can be approached as a sequence of objects. We thus evaluate different end-to-end approaches to solve the HDSR problem, particularly in two verticals: those based on object-detection (e.g., Yolo and RetinaNet) and those based on sequence-to-sequence representation (CRNN). The main contribution of this work lies in its provision of a comprehensive comparison with a critical analysis of the above mentioned strategies on five benchmarks commonly used to assess HDSR, including the challenging Touching Pair dataset, NIST SD19, and two real-world datasets (CAR and CVL) proposed for the ICFHR 2014 competition on HDSR. Our results show that the Yolo model compares favorably against segmentation-free models with the advantage of having a shorter pipeline that minimizes the presence of heuristics-based models. It achieved a 97%, 96%, and 84% recognition rate on the NIST-SD19, CAR, and CVL datasets, respectively.
Κατασκευές της γερμανικότητας στο δημοτικό σχολείο: Η περίπτωση του εγχειριδίου Junior
Creators: name: Χατζηγιαννίδου, Χριστίνα
name: Στάμου, Αναστασία
Publisher: name: Journal of Applied Linguistics
Year: 2023

description: Learning a foreign language means the contact with another culture and worldview, but also with the language ideologies and ethnocultural stereotypes associated with this language. In the present study, we investigate constructions of Germanness ─meaning a nexus of representations about the German language, the German-speaking countries and cultures─ in the textbook Junior. Junior is an adapted version of the international textbook series Wo ist Paula?, to be used for the teaching of German as a second foreign language in the Greek primary school context. To account for the constructions of Germanness and their ideological role in the textbook, we drew upon Critical Discourse Analysis. In addition, a comparative analysis of the Greek adapted version with the original/international textbook discloses several modifications with respect to the constructions of Germanness for the Greek audience, shedding light on how the Greek national self considers the German national other.
description: Journal of Applied Linguistics, Αρ. 36 (2023)
Spanners for Geometric Intersection Graphs
Creators: name: Furer, Martin
name: Kasiviswanathan, Shiva Prasad
Publisher: name: arXiv
Year: 2006
Subjects: subject: Computational Geometry (cs.CG)
subject: FOS: Computer and information sciences
subject: F.2.2

description: Efficient algorithms are presented for constructing spanners in geometric intersection graphs. For a unit ball graph in R^k, a (1+ε)-spanner is obtained using efficient partitioning of the space into hypercubes and solving bichromatic closest pair problems. The spanner construction has almost equivalent complexity to the construction of Euclidean minimum spanning trees. The results are extended to arbitrary ball graphs with a sub-quadratic running time. For unit ball graphs, the spanners have a small separator decomposition which can be used to obtain efficient algorithms for approximating proximity problems like diameter and distance queries. The results on compressed quadtrees, geometric graph separators, and diameter approximation might be of independent interest.
description: 16 pages, 5 figures, Latex
Kirchlich-sozialethische Herausforderungen des EG-Binnenmarktes
Creators: name: Just, Wolf-Dieter
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 38 Nr. 4 (1989): Ökumenische Rundschau, Band 38, Heft 4
Activating diversity: The use of dual language books for critical plurilingual education
Creators: name: Gkaintartzi, Anastasia
name: Triantou, Georgia
Publisher: name: Journal of Applied Linguistics
Year: 2023

description: This paper presents an action research which aimed at exploring the implementation of multilingual storytelling with the use of dual language picture books among young learners in a pre-school class in order to promote critical multilingual awareness (García, 2017) and intercultural competence for fostering diversity, social equity and linguistic justice (Piller, 2021). Throughout the four research cycles of the action research, the children were actively engaged with multilingual books and plurilingual activities, including and voicing minoritised and ‘invisibilised’ languages in class, thus opening a ‘window’ to the rich linguistic diversity in society beyond the languages validated in school education. The research data was collected through the use of multiple and multimodal research tools which included observation, group discussions with the children, interviews with parents while also, drawing from an arts-based visual methodology, students’ language portraits, concept maps and Dominant Language Constellations (DLCs) (Aronin, 2019). After presenting parts of the action research cycles, we discuss the research findings, with a focus on the children’s DLC models, visualizing their perceptions, feelings and lived experiences with multilingualism through their active engagement with the multilingual books and activities. Implications of the findings are discussed for the multiple potentialities of dual language books in striving for a more inclusive and emancipatory language education, which can develop critical multilingual awareness and promote linguistic justice.
description: Journal of Applied Linguistics, Αρ. 36 (2023)
String/Gauge Duality: (re)discovering the QCD String in AdS Space
Creators: name: Brower, Richard C.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: These lectures trace the origin of string theory as a theory of hadronic interactions (predating QCD itself) to the present ideas on how the QCD string may arise in Superstring theory in a suitably deformed background metric. The contributions of 'tHooft's large Nc limit, Maldacena's String/Gauge duality conjecture and lattice spectral data are emphasized to motivate and hopefully guide further efforts to define a fundamental QCD string.
description: 32 pages, 4 figures, Based on three lectures at the 43rd Cracow School of Theoretical Physics, Zakopane, Polan, June 2003