cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
On the ionisation fraction in protoplanetary disks III. The effect of X-ray flares on gas-phase chemistry
Creators: name: Ilgner, Martin
name: Nelson, Richard P.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Context. Recent observations of the X-ray emission from T Tauri stars in the Orion nebula have shown that they undergo frequent outbursts in their X-ray luminosity. These X-ray flares are characterised by increases in luminosity by two orders of magnitude, a typical duration of less than one day, and a significant hardening of the X-ray spectrum. Aims. It is unknown what effect these X-ray flares will have on the ionisation fraction and dead-zone structure in protoplanetary disks. We present the results of calculations designed to address this question. Methods. We have performed calculations of the ionisation fraction in a standard $α$-disk model using two different chemical reaction networks. We include in our models ionisation due to X-rays from the central star, and calculate the time-dependent ionisation fraction and dead--zone structure for the inner 10 AU of a protoplanetary disk model. Results. We find that the disk response to X-ray flares depends on whether the plasma temperature increases during flares and/or whether heavy metals (such as magnesium) are present in the gas phase. Under favourable conditions the outer disk dead--zone can disappear altogether,and the dead-zone located between 0.5 < R < 2 AU can disappear and reappear in phase with the X-ray luminosity. Conclusions. X-ray flares can have a significant effect on the dead-zone structure in protoplanetary disks. Caution is required in interpreting this result as the duration of X-ray bursts is considerably shorter than the growth time of MHD turbulence due to the magnetorotational instability.
description: 12 pages, 8 figures, accepted by A & A
Additional file 1 of Development of a scale to measure expected concussion reporting behavior
Creators: name: Kroshus, Emily
name: Lowry, Sarah J.
name: Garrett, Kimberly
name: Hays, Rachel
name: Hunt, Tamerah
name: Chrisman, Sara P. D.
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Science Policy

description: Additional file 1: Demographic characteristics of predictive validity sample.
Nonthermal filaments from the tidal destruction of clouds in the Galactic center
Creators: name: Coughlin, Eric R.
name: Nixon, C. J.
name: Ginsburg, Adam
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Synchrotron-emitting, nonthermal filaments (NTFs) have been observed near the Galactic center for nearly four decades, yet their physical origin remains unclear. Here we investigate the possibility that NTFs are produced by the destruction of molecular clouds by the gravitational potential of the Galactic center. We show that this model predicts the formation of a filamentary structure with length on the order of tens to hundreds of pc, a highly ordered magnetic field along the axis of the filament, and conditions conducive to magnetic reconnection that result in particle acceleration. This model therefore yields the observed magnetic properties of NTFs and a population of relativistic electrons, without the need to appeal to a dipolar, $\sim$ mG, Galactic magnetic field. As the clouds can be both completely or partially disrupted, this model provides a means of establishing the connection between filamentary structures and molecular clouds that is observed in some, but not all, cases.
description: Figure added, includes referee suggestions
Multi-Channel Multi-Domain based Knowledge Distillation Algorithm for Sleep Staging with Single-Channel EEG
Creators: name: Zhang, Chao
name: Liao, Yiqiao
name: Han, Siqi
name: Zhang, Milin
name: Wang, Zhihua
name: Xie, Xiang
Publisher: name: arXiv
Year: 2024
Subjects: subject: Signal Processing (eess.SP)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: This paper proposed a Multi-Channel Multi-Domain (MCMD) based knowledge distillation algorithm for sleep staging using single-channel EEG. Both knowledge from different domains and different channels are learnt in the proposed algorithm, simultaneously. A multi-channel pre-training and single-channel fine-tuning scheme is used in the proposed work. The knowledge from different channels in the source domain is transferred to the single-channel model in the target domain. A pre-trained teacher-student model scheme is used to distill knowledge from the multi-channel teacher model to the single-channel student model combining with output transfer and intermediate feature transfer in the target domain. The proposed algorithm achieves a state-of-the-art single-channel sleep staging accuracy of 86.5%, with only 0.6% deterioration from the state-of-the-art multi-channel model. There is an improvement of 2% compared to the baseline model. The experimental results show that knowledge from multiple domains (different datasets) and multiple channels (e.g. EMG, EOG) could be transferred to single-channel sleep staging.
description: 5 pages, 2 figures, published by IEEE TCAS-II
A better proof of the Goldman-Parker conjecture
Creators: name: Schwartz, Richard Evan
Publisher: name: arXiv
Year: 2005
Subjects: subject: Group Theory (math.GR)
subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 20F67, 20F65, 20F55

description: The Goldman-Parker Conjecture classifies the complex hyperbolic C-reflection ideal triangle groups up to discreteness. We proved the Goldman-Parker Conjecture in [Ann. of Math. 153 (2001) 533--598] using a rigorous computer-assisted proof. In this paper we give a new and improved proof of the Goldman-Parker Conjecture. While the proof relies on the computer for extensive guidance, the proof itself is traditional.
description: Published by Geometry and Topology at http://www.maths.warwick.ac.uk/gt/GTVol9/paper35.abs.html
Emerging issues of identity and language socialization in the process of reaccreditation for registered nurses educated abroad
Creators: name: Sewerin, Margarita
Publisher: name: University of British Columbia
Year: 2009

description: This study examines how foreign educated nurses experience the acquisition of the language and culture of nursing in Canada through the process of reaccreditation. The study explores five nurses' perceptions in the following areas: a) the nature of nursing in which they were socialized in their own country and in Canada; b) how they became socialized into the culture of Canadian nursing through the reaccreditation process and programs designed to assist them; c) how they will continue to be socialized after reaccreditation as working professionals in Canada. A life history approach was used to explore the nurses' perspective on nursing across language and culture within a chronological or developmental framework. The voices presented in the stories belong to five nurses who were successful in obtaining reaccreditation after completing two programs designed to assist them in fulfilling the licensure requirements and in preparing for work in the Canadian health system. Five life stories were collected through interviews which were then edited and analyzed. The themes in the stories appear to indicate that in these nurses' view, first of all, their identity as nurses underwent a complex interplay involving elements, some of which remained constant (the notion of caring) and others which are manifested differently in different cultures and must be learned (how to approach patients). Secondly, the nurses in the study indicated that the programs in which they participated, in particular a refresher program, were invaluable in preparing them to be competent, confident nurses in Canada. Two components were identified by the nurses as being particularly valuable, one was the Communications course, where they learned the language and communication of care that is culturally appropriate for Canada; the other one was the clinical practice, where they saw first-hand how nursing is practiced in this culture, and had the opportunity to integrate their previous knowledge and experience with the newly acquired theory. The ESL components of these programs did not meet the nurses' expectations. According to the nurses, the ESL classes were designed primarily to help them obtain the required scores on the TOEFL and TSE, two examinations which they saw as not being indicative of language proficiencies required for nursing. The five women felt that most activities in the ESL class were decontextualized, neither supporting them with the academic language needs of the nursing courses, nor preparing them for the language needs of the workplace. Finally, all the nurses in this study currently work in the Canadian health care system. They describe how they continue to be socialized into the culture of nursing and reflect on changes in their sense of being nurses in Canada. At the end of the study, implications were drawn for further research and practice.
The lineage process in Galton--Watson trees and globally centered discrete snakes
Creators: name: Marckert, Jean-François
Publisher: name: arXiv
Year: 2008
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60J80, 60F17, 60J65 (Primary)

description: We consider branching random walks built on Galton--Watson trees with offspring distribution having a bounded support, conditioned to have $n$ nodes, and their rescaled convergences to the Brownian snake. We exhibit a notion of ``globally centered discrete snake'' that extends the usual settings in which the displacements are supposed centered. We show that under some additional moment conditions, when $n$ goes to $+\infty$, ``globally centered discrete snakes'' converge to the Brownian snake. The proof relies on a precise study of the lineage of the nodes in a Galton--Watson tree conditioned by the size, and their links with a multinomial process [the lineage of a node $u$ is the vector indexed by $(k,j)$ giving the number of ancestors of $u$ having $k$ children and for which $u$ is a descendant of the $j$th one]. Some consequences concerning Galton--Watson trees conditioned by the size are also derived.
description: Published in at http://dx.doi.org/10.1214/07-AAP450 the Annals of Applied Probability (http://www.imstat.org/aap/) by the Institute of Mathematical Statistics (http://www.imstat.org)
See360: Novel Panoramic View Interpolation
Creators: name: Liu, Zhi-Song
name: Cani, Marie-Paule
name: Siu, Wan-Chi
Publisher: name: arXiv
Year: 2024
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Graphics (cs.GR)
subject: FOS: Computer and information sciences

description: We present See360, which is a versatile and efficient framework for 360 panoramic view interpolation using latent space viewpoint estimation. Most of the existing view rendering approaches only focus on indoor or synthetic 3D environments and render new views of small objects. In contrast, we suggest to tackle camera-centered view synthesis as a 2D affine transformation without using point clouds or depth maps, which enables an effective 360? panoramic scene exploration. Given a pair of reference images, the See360 model learns to render novel views by a proposed novel Multi-Scale Affine Transformer (MSAT), enabling the coarse-to-fine feature rendering. We also propose a Conditional Latent space AutoEncoder (C-LAE) to achieve view interpolation at any arbitrary angle. To show the versatility of our method, we introduce four training datasets, namely UrbanCity360, Archinterior360, HungHom360 and Lab360, which are collected from indoor and outdoor environments for both real and synthetic rendering. Experimental results show that the proposed method is generic enough to achieve real-time rendering of arbitrary views for all four datasets. In addition, our See360 model can be applied to view synthesis in the wild: with only a short extra training time (approximately 10 mins), and is able to render unknown real-world scenes. The superior performance of See360 opens up a promising direction for camera-centered view rendering and 360 panoramic view interpolation.
description: 12 pages, 10 figures
The Universe is a Strange Place
Creators: name: Wilczek, Frank
Publisher: name: arXiv
Year: 2005
Subjects: subject: Popular Physics (physics.pop-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Our understanding of ordinary matter is remarkably accurate and complete, but it is based on principles that are very strange and unfamiliar. As I'll explain, we've come to understand matter to be a Music of the Void, in a remarkably literal sense. Just as we physicists finalized that wonderful understanding, towards the end of the twentieth century, astronomers gave us back our humility, by informing us that ordinary matter -- what we, and chemists and biologists, and astronomers themselves, have been studying all these centuries constitutes only about 5% of the mass of the universe as a whole. I'll describe some of our promising attempts to rise to this challenge by improving, rather than merely complicating, our description of the world.
description: Public lecture delivered at Lepton-Photon 2005, Uppsala, Sweden, and in related forms on several other occasions. To be published in the Proceedings. 14 pages, 6 figures. v2: Two paragraphs that were inadvertently deleted are restored
Hirsch, Helga: Bewegungen für Demokratie und Unabhängigkeit in Polen 1976-1980
Creators: name: Hd.
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 34 Nr. 3 (1985): Ökumenische Rundschau, Band 34, Heft 3
Magnetism-driven unconventional effects in Ising superconductors: role of proximity, tunneling, and nematicity
Creators: name: Wickramaratne, Darshana
name: Haim, Menashe
name: Khodas, Maxim
name: Mazin, I. I.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Hybrid Ising superconductor-ferromagnetic insulator heterostructures provide a unique opportunity to explore the interplay between proximity-induced magnetism, spin-orbit coupling and superconductivity. Here we use a combination of first-principles calculations of NbSe$_{2}$/CrBr$_{3}$ heterostructures and an analytical theory of Ising superconductivity to analyze the existing experiments and provide a complete explanation of highly nontrivial and largely counterintuitive effects: an increase in the magnitude of the superconducting gap accompanied by the broadening of the tunneling peaks; hysteretic behavior of the tunneling conductance that sets in $\approx 2$ K below $T_c$; and nematic symmetry breaking in the superconducting state. The microscopic reason in all three cases appears to be the interplay between the proximity-induced exchange splitting and intrinsic defects. Finally, we predict additional interesting effects that at the moment cannot be addressed experimentally: spin-filtering when tunneling across CrBr$_{3}$ and tunneling ``hot spots'' in momentum space that are anticorrelated with regions where the spin-orbit splitting is maximum.
Mixtures of Charged Colloid and Neutral Polymer: Influence of Electrostatic Interactions on Demixing and Interfacial Tension
Creators: name: Denton, Alan R.
name: Schmidt, Matthias
Publisher: name: arXiv
Year: 2005
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The equilibrium phase behavior of a binary mixture of charged colloids and neutral, non-adsorbing polymers is studied within free-volume theory. A model mixture of charged hard-sphere macroions and ideal, coarse-grained, effective-sphere polymers is mapped first onto a binary hard-sphere mixture with non-additive diameters and then onto an effective Asakura-Oosawa model [S. Asakura and F. Oosawa, J. Chem. Phys. 22, 1255 (1954)]. The effective model is defined by a single dimensionless parameter -- the ratio of the polymer diameter to the effective colloid diameter. For high salt-to-counterion concentration ratios, a free-volume approximation for the free energy is used to compute the fluid phase diagram, which describes demixing into colloid-rich (liquid) and colloid-poor (vapor) phases. Increasing the range of electrostatic interactions shifts the demixing binodal toward higher polymer concentration, stabilizing the mixture. The enhanced stability is attributed to a weakening of polymer depletion-induced attraction between electrostatically repelling macroions. Comparison with predictions of density-functional theory reveals a corresponding increase in the liquid-vapor interfacial tension. The predicted trends in phase stability are consistent with observed behavior of protein-polysaccharide mixtures in food colloids.
description: 16 pages, 5 figures
Adult ESL learners constructing knowledge by writing texts
Creators: name: Kim, Chin-Hyŏn
Publisher: name: University of British Columbia
Year: 2009

description: Because of an emphasis on academic discourse in tertiary-level courses, many adult ESL students discover that they need to adjust their strategies for learning ESL. Prior to attending university in English-speaking countries, these students tend to focus their ESL learning strategies on spoken English perhaps largely because they believe spoken English accounts for the bulk of ordinary people's communication time. When they begin studying at an English-speaking university, however, their participation shifts and the focus of their ESL learning strategies become written English. This paper reports a seven-week research project which involved six Korean adult ESL learners who, in an effort to improve their academic discourse competence, wrote reading logs about English newspaper articles. These logs mainly featured summaries and personal responses based on opinion articles such as editorials and columns. The research questions focused on exploring mainly the participants' self-reported benefits, difficulties and transfer of learning. The participants felt that the reading log strategy helped them detect and correct their ESL reading and writing weaknesses. They experienced a close relationship between reading comprehension and academic writing skills: They had difficulty writing their reading logs when they had a shaky grasp of content. They also felt that writing reading logs got them predisposed toward active or spirited oral discussion. Such research findings led to the conclusion that the reading log strategy is a good way to improve and integrate reading, writing and oral discussion skills for ESL learners. This paper might help educators gain insight into how adult ESL learners' academic discourse skills can be developed.
Additional file 1 of Translation and validation of modified dental anxiety scale based on adult Taiwan population
Creators: name: Lin, Chia-Shu
name: Lee, Chen-Yi
name: Wu, Shih-Yun
name: Chen, Li-Ling
name: Lee, Kun-Tsung
name: Wang, Min-Ching
name: Wang, Tze-Fang
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Neuroscience
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences
subject: Hematology

description: Additional file 1. The final version of the scale used in the study.
Chiral D-brane Models with Frozen Open String Moduli
Creators: name: Blumenhagen, Ralph
name: Cvetic, Mirjam
name: Marchesano, Fernando
name: Shiu, Gary
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Most intersecting D-brane vacua in the literature contain additional massless adjoint fields in their low energy spectrum. The existence of these additional fields make it difficult to obtain negative beta functions and, eventually, asymptotic freedom. We address this important issue for N=1 intersecting D-brane models, rephrasing the problems in terms of (open string) moduli stabilization. In particular, we consider a Z2 x Z2 orientifold construction where D6-branes wrap rigid 3-cycles and such extra adjoint fields do not arise. We derive the model building rules and consistency conditions for intersecting branes in this background, and provide N=1 chiral vacua free of adjoint fields. More precisely, we construct a Pati-Salam-like model whose SU(4) gauge group is asymptotically free. We also comment on the application of these results for obtaining gaugino condensation in chiral D-brane models. Finally, we embed our constructions in the framework of flux compactification, and construct new classes of N=1 and N=0 chiral flux vacua.
description: 55 pages, 4 figures. Bibtex format
QCD pressure: renormalization group optimized perturbation theory confronts lattice
Creators: name: Kneur, Jean-Loïc
name: Pinto, Marcus Benghi
name: Restrepo, Tulio E.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Theory (hep-th)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The quark contribution to the QCD pressure, $P_q$, is evaluated up to next-to-leading order (NLO) within the renormalization group optimized perturbation theory (RGOPT) resummation approach. To evaluate the complete QCD pressure we simply add the perturbative NLO contribution from massless gluons to the resummed $P_q$. Despite of this unsophisticated approximation our results for $P = P_q +P_g$ at the central scale $M\sim 2πT$ show a remarkable agreement with ab initio lattice predictions for $0.25 \lesssim T \lesssim 1 \, {\rm GeV}$. We also show that by being imbued with RG properties, the RGOPT produces a drastic reduction of the embarrassing remnant scale dependence that plagues both standard thermal perturbative QCD and hard thermal loop perturbation theory (HTLpt) applications.
description: 6 pages and 3 figures. Further clarifications. To appear in Phys. Rev. D
85Peg A: which age for a low metallicity solar like star?
Creators: name: D'Antona, F.
name: Cardini, D.
name: Di Mauro, M. P.
name: Maceroni, C.
name: Mazzitelli, I.
name: Montalban, J.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We explore the possible evolutionary status of the primary component of the binary 85 Pegasi, listed as a target for asteroseismic observations by the MOST satellite. In spite of the assessed `subdwarf' status, and of the accurate distance determination from the Hipparcos data, the uncertainties in the metallicity and age, coupled with the uncertainty in the theoretical models, lead to a range of predictions on the oscillation frequency spectrum. Nevertheless, the determination of the ratio between the small separation in frequency modes, and the large separation as suggested by Roxburgh (2004), provides a very good measure of the star age, quite independent of the metallicity in the assumed uncertainty range. In this range, the constraint on the dynamical mass and the further constraint provided by the assumption that the maximum age is 14 Gyr limit the mass of 85PegA to the range from 0.75 to 0.82Msun. This difference of a few hundreths of solar masses leads to well detectable differences both in the evolutionary stage (age) and in the asteroseismic properties. We show that the age determination which will be possible through the asteroseismic measurements for this star is independent either from the convection model adopted or from the microscopic metal diffusion. The latter conclusion is strengthened by the fact that, although metal diffusion is still described in an approximate way, recent observations suggest that the real stars suffer a smaller metal sedimentation with respect to the models.
description: accepted for publication in the MNRAS
Spatial Reverberation and Dereverberation using an Acoustic Multiple-Input Multiple-Output System
Creators: name: Morgenstern, Hai
name: Rafaely, Boaz
Publisher: name: arXiv
Year: 2024
Subjects: subject: Audio and Speech Processing (eess.AS)
subject: Sound (cs.SD)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: Methods are proposed for modifying the reverberation characteristics of sound fields in rooms by employing a loudspeaker with adjustable directivity, realized with a compact spherical loudspeaker array (SLA). These methods are based on minimization and maximization of clarity and direct-to-reverberant sound ratio. Significant modification of reverberation is achieved by these methods, as shown in simulation studies. The system under investigation includes a spherical microphone array and an SLA comprising a multiple-input multiple-output system. The robustness of these methods to system identification errors is also investigated. Finally, reverberation and dereverberation results are validated by a listening experiment.
On the optimal certification of von Neumann measurements
Creators: name: Lewandowska, Paulina
name: Krawiec, Aleksandra
name: Kukulski, Ryszard
name: Pawela, Łukasz
name: Puchała, Zbigniew
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In this report we study certification of quantum measurements, which can be viewed as the extension of quantum hypotheses testing. This extension involves also the study of the input state and the measurement procedure. Here, we will be interested in two-point (binary) certification scheme in which the null and alternative hypotheses are single element sets. Our goal is to minimize the probability of the type II error given some fixed statistical significance. In this report, we begin with studying the two-point certification of pure quantum states and unitary channels to later use them to prove our main result, which is the certification of von Neumann measurements in single-shot and parallel scenarios. From our main result follow the conditions when two pure states, unitary operations and von Neumann measurements cannot be distinguished perfectly but still can be certified with a given statistical significance. Moreover, we show the connection between the certification of quantum channels or von Neumann measurements and the notion of $q$-numerical range.
Charged analogue of Finch-Skea stars
Creators: name: Hansraj, S.
name: Maharaj, S. D.
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We present solutions to the Einstein-Maxwell system of equations in spherically symmetric gravitational fields for static interior spacetimes with a specified form of the electric field intensity. The condition of pressure isotropy yields three category of solutions. The first category is expressible in terms of elementary functions and does not have an uncharged limit. The second category is given in terms of Bessel functions of half-integer order. These charged solutions satisfy a barotropic equation of state and contain Finch-Skea uncharged stars. The third category is obtained in terms of modified Bessel functions of half-integer order and does not have an uncharged limit. The physical features of the charged analogue of the Finch-Skea stars are studied in detail. In particular the condition of causality is satisfied and the speed of sound does not exceed the speed of light. The physical analysis indicates that this analogue is a realistic model for static charged relativistic perfect fluid spheres.
description: 17 pages, To appear in Int. J. Mod. Phys. D
Developments for the TRAX simulation code
Creators: name: Krämer, M.
name: Scifoni, E.
name: Wälzlein, C.
name: Durante, M.
Publisher: name: GSI Helmholtzzentrum fuer Schwerionenforschung, Darmstadt
Year: 2015
Subjects: Physics

description: GSI Scientific Report 2014 - GSI Report 2015-1
Néel Ordering in the Distorted Honeycomb Pyrosilicate: C-Er$_{2}$Si$_{2}$O$_{7}$
Creators: name: Hester, Gavin
name: DeLazzer, T. N.
name: Lim, S. S.
name: Brown, C. M.
name: Ross, K. A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The rare-earth pyrosilicate family of compounds (RE$_{2}$Si$_{2}$O$_{7}$) hosts a variety of polymorphs, some with honeycomb-like geometries of the rare-earth sublattices, and the magnetism has yet to be deeply explored in many of the cases. Here we report on the ground state properties of C-Er$_{2}$Si$_{2}$O$_{7}$. C-Er$_{2}$Si$_{2}$O$_{7}$ crystallizes in the C2/m space group and the Er$^{3+}$ atoms form a distorted honeycomb lattice in the $a$-$b$ plane. We have utilized specific heat, DC susceptibility, and neutron diffraction measurements to characterize C-Er$_{2}$Si$_{2}$O$_{7}$. Our specific heat and DC susceptibility measurements show signatures of antiferromagnetic ordering at 2.3 K. Neutron powder diffraction confirms this transition temperature and the relative intensities of the magnetic Bragg peaks are consistent with a collinear Néel state in the magnetic space group C2'/m, with ordered moment of 6.61 $μ_{B}$ canted 13$^{\circ}$ away from the $c$-axis toward the $a$-axis. These results are discussed in relation to the isostructural quantum dimer magnet compound Yb$_{2}$Si$_{2}$O$_{7}$.
description: 5 pages, 4 figures, updated with revised figures and text
Touching the $Z_2$ in Three-Dimensional Rotations
Creators: name: Stojanoska, Vesna
name: Stoytchev, Orlin
Publisher: name: arXiv
Year: 2005
Subjects: subject: History and Overview (math.HO)
subject: Algebraic Topology (math.AT)
subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 00A08, 20F36, 55-01

description: A simple and self-contained proof is presented of the well-known fact that the fundamental group of SO(3) is $Z_2$, using a relationship between closed paths in SO(3) and braids.
description: 10 pages, 8 figures
Helium ion beam modelling
Creators: name: Krämer, M.
name: Scifoni, E.
name: Schmitz, F.
name: Durante, M.
Publisher: name: GSI Helmholtzzentrum fuer Schwerionenforschung, Darmstadt
Year: 2015
Subjects: Physics

description: GSI Scientific Report 2014 - GSI Report 2015-1
Fermions and baryons as open-string states from brane junctions
Creators: name: Nakas, Theodoros
name: Rigatos, Konstantinos S.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: There has been recent progress towards understanding the dynamics of world-volume fermions that arise as open-string modes from brane intersections in the probe limit $(N_f/N_c \rightarrow 0)$. In this work we consider all possible BPS brane junctions in Type IIA/B supergravity theories. We study in detail the dynamics of these states by deriving their equations of motion. We show the expected degeneracy of the bosonic and fermionic fluctuations as is expected due to the preserved supersymmetry. We also give some supporting evidence and refine the notion that these states can effectively describe baryon operators in a certain regime of the field theory's parameter space. Our piece of evidence is the demonstration of the expected scaling of the mass in the large-$N_c$ limit of the theory for these fermionic states; $M^2 \sim N^2_c$. Finally, we explain analytically the avoided level crossing that was observed in a previous work after the inclusion of higher dimension operators in the field theory.
description: 37 pages, 9 tables, 4 figures, typos corrected, JHEP version
The cosmology dependence of galaxy clustering and lensing from a hybrid $N$-body-perturbation theory model
Creators: name: Kokron, Nickolas
name: DeRose, Joseph
name: Chen, Shi-Fan
name: White, Martin
name: Wechsler, Risa H.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: We implement a model for the two-point statistics of biased tracers that combines dark matter dynamics from $N$-body simulations with an analytic Lagrangian bias expansion. Using Aemulus, a suite of $N$-body simulations built for emulation of cosmological observables, we emulate the cosmology dependence of these nonlinear spectra from redshifts $z = 0$ to $z=2$. We quantify the accuracy of our emulation procedure, which is sub-per cent at $k=1\, h {\rm Mpc}^{-1}$ for the redshifts probed by upcoming surveys and improves at higher redshifts. We demonstrate its ability to describe the statistics of complex tracer samples, including those with assembly bias and baryonic effects, reliably fitting the clustering and lensing statistics of such samples at redshift $z\simeq 0.4$ to scales of $k_{\rm max} \approx 0.6\, h\mathrm{Mpc}^{-1}$. We show that the emulator can be used for unbiased cosmological parameter inference in simulated joint clustering and galaxy--galaxy lensing analyses with data drawn from an independent $N$-body simulation. These results indicate that our emulator is a promising tool that can be readily applied to the analysis of current and upcoming datasets from galaxy surveys.
description: 19 pages, 17 figures. Updated to reflect the journal version. Code available at https://github.com/kokron/anzu
Fragmentation of 120 and 300 MeV/u $^4$He in water
Creators: name: Rovituso, M.
name: Schuy, C.
name: Pleskac, R.
name: Izraeli, D.
name: Krämer, M.
name: Durante, M.
Publisher: name: GSI Helmholtzzentrum fuer Schwerionenforschung, Darmstadt
Year: 2015
Subjects: Physics

description: GSI Scientific Report 2014 - GSI Report 2015-1
Empirical Functionals for Reduced Density Matrix Functional Theory
Creators: name: Marques, Miguel A. L.
name: Lathiotakis, N. N.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Computational Physics (physics.comp-ph)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: We present fully empirical exchange-correlation functionals to be used within reduced density matrix functional theory (RDMFT). These are of the popular J-K form, where the function of the occupation numbers that multiplies the Fock orbital term is written as a Pade approximant. The coefficients of the Pade are optimized for a testset of eight molecules, and then refined for a larger set of 35 molecules. Two different approaches were tried, either keeping the self-interaction terms, or by removing them explicitly from the functional. The functionals thus obtained involve very few parameters, but are able to outperform other RDMFT functionals, yielding correlation energies that are, on average, even slightly better than Moeller-Plesset MP2 theory.
description: 4 pages, 2 figures
title: Cahiers de lexicologie. 2015-2, n° 107
title: La recherche linguistique en Italie
titleType: Subtitle
Creators: name: (:Unap)
Publisher: name: Classiques Garnier
Year: 2015
Subjects: subject: Linguistique italienne
subject: Linguistique historique
subject: Grammaire générative
subject: Typologie
subject: Linguistique cognitive
subject: Linguistique textuelle
subject: Langue orale
subject: Sociétés de linguistique italiennes

description: Contributeurs : Federico Albano Leoni, Stefano Arduini, Anamaria Curea, Pierluigi Cuzzolin, Gaétane Dostie, Marco Fasciolo, Angela Ferrari, Béatrice Godart-Wendling, Frédéric Goubier, Rosalind Greenstein, Sandra Lhafi, Carla Marello, Caterina Mauri, Paolo Ramat, Jean-François Sablayrolles et Andrea Sanso.
Modal smoothing for analysis of room reflections measured with spherical microphone and loudspeaker arrays
Creators: name: Morgenstern, Hai
name: Rafaely, Boaz
Publisher: name: arXiv
Year: 2024
Subjects: subject: Audio and Speech Processing (eess.AS)
subject: Sound (cs.SD)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: Spatial analysis of room acoustics is an ongoing research topic. Microphone arrays have been employed for spatial analyses with an important objective being the estimation of the direction-of-arrival (DOA) of direct sound and early room reflections using room impulse responses (RIRs). An optimal method for DOA estimation is the multiple signal classification algorithm. When RIRs are considered, this method typically fails due to the correlation of room reflections, which leads to rank deficiency of the cross-spectrum matrix. Preprocessing methods for rank restoration, which may involve averaging over frequency, for example, have been proposed exclusively for spherical arrays. However, these methods fail in the case of reflections with equal time delays, which may arise in practice and could be of interest. In this paper, a method is proposed for systems that combine a spherical microphone array and a spherical loudspeaker array, referred to as multiple-input multiple-output systems. This method, referred to as modal smoothing, exploits the additional spatial diversity for rank restoration and succeeds where previous methods fail, as demonstrated in a simulation study. Finally, combining modal smoothing with a preprocessing method is proposed in order to increase the number of DOAs that can be estimated using low-order spherical loudspeaker arrays.
Comparison of lattice QCD+QED predictions for radiative leptonic decays of light mesons with experimental data
Creators: name: Frezzotti, R.
name: Garofalo, M.
name: Lubicz, V.
name: Martinelli, G.
name: Sachrajda, C. T.
name: Sanfilippo, F.
name: Simula, S.
name: Tantalo, N.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We present a comparison of existing experimental data for the radiative leptonic decays $P\to\ellν_\ellγ$, where $P=K$ or $π$ and $\ell=e$ or $μ$, from the KLOE, PIBETA, E787, ISTRA+ and OKA collaborations with theoretical predictions based on the recent non-perturbative determinations of the structure-dependent vector and axial-vector form factors, $F_V$ and $F_A$ respectively. These were obtained using lattice QCD+QED simulations at order $O(α_{\mathrm{em}})$ in the electromagnetic coupling. We find good agreement with the KLOE data on $K\to eν_eγ$ decays from which the form factor $F^+=F_V+F_A$ can be determined. For $K\toμν_μγ$ decays we observe differences of up to 3\,-\,4 standard deviations at large photon energies between the theoretical predictions and the data from the E787, ISTRA+ and OKA experiments and similar discrepancies in some kinematical regions with the PIBETA experiment on radiative pion decays. A global study of all the kaon-decay data within the Standard Model results in a poor fit, largely because at large photon energies the KLOE and E787 data cannot be reproduced simultaneously in terms of the same form factor $F^+$. The discrepancy between the theoretical and experimental values of the form factor $F^-=F_V-F_A$ is even more pronounced. These observations motivate future improvements of both the theoretical and experimental determinations of the structure-dependent form factors $F^+$ and $F^-$, as well as further theoretical investigations of models of "new physics" which might for example, include possible flavor changing interactions beyond $V - A$ and/or non-universal corrections to the lepton couplings.
description: 31 pages, 8 figures, 11 tables. Version to appear in Phys. Rev. D
Cold atoms in non-Abelian gauge potentials: From the Hofstadter "moth" to lattice gauge theory
Creators: name: Osterloh, K.
name: Baig, M.
name: Santos, L.
name: Zoller, P.
name: Lewenstein, M.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We demonstrate how to create artificial external non-Abelian gauge potentials acting on cold atoms in optical lattices. The method employs $n$ internal states of atoms and laser assisted state sensitive tunneling. Thus, dynamics are communicated by unitary $n\times n$-matrices. By experimental control of the tunneling parameters, the system can be made truly non-Abelian. We show that single particle dynamics in the case of intense U(2) vector potentials lead to a generalized Hofstadter butterfly spectrum which shows a complex ``moth''-like structure. We discuss the possibility to employ non-Abelian interferometry (Aharonov-Bohm effect) and address methods to realize matter dynamics in specific classes of lattice gauge fields.
description: 5 pages, 3 figures
A Markov Chain Monte Carlo approach to the study of massive black hole binary systems with LISA
Creators: name: Wickham, E. D. L.
name: Stroeer, A.
name: Vecchio, A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The Laser Interferometer Space Antenna (LISA) will produce a data stream containing a vast number of overlapping sources: from strong signals generated by the coalescence of massive black hole binary systems to much weaker radiation form sub-stellar mass compact binaries and extreme-mass ratio inspirals. It has been argued that the observation of weak signals could be hampered by the presence of loud ones and that they first need to be removed to allow such observations. Here we consider a different approach in which sources are studied simultaneously within the framework of Bayesian inference. We investigate the simplified case in which the LISA data stream contains radiation from a massive black hole binary system superimposed over a (weaker) quasi-monochromatic waveform generated by a white dwarf binary. We derive the posterior probability density function of the model parameters using an automatic Reversible Jump Markov Chain Monte Carlo algorithm (RJMCMC). We show that the information about the sources and noise are retrieved at the expected level of accuracy without the need of removing the stronger signal. Our analysis suggests that this approach is worth pursuing further and should be considered for the actual analysis of the LISA data.
description: submitted to cqg as GWDAW-10 conference proceedings, 10 pages, 4 figures, some changes to plots and numerical details
Observation of a metallic superfluid in a numerical experiment
Creators: name: Smorgrav, E.
name: Smiseth, J.
name: Babaev, E.
name: Sudbo, A.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We report the observation, in Monte Carlo simulations, of a novel type of quantum ordered state: {\it the metallic superfluid}. The metallic superfluid features ohmic resistance to counter-flows of protons and electrons, while featuring dissipationless co-flows of electrons and protons. One of the candidates for a physical realization of this remarkable state of matter is hydrogen or its isotopes under high compression. This adds another potential candidate to the presently known quantum dissipationless states, namely superconductors, superfluid liquids and vapours, and supersolids.
description: 4 pages, 2 figures. Accepted for publication in Phys. Rev. Lett
Alexandre Dumas critique dramatique (mars 1836-mars1838). 2015, n° 42
Creators: name: (:Unap)
Publisher: name: Classiques Garnier
Year: 2015
Subjects: subject: Littérature française du XIXe siècle
subject: Arts du spectacle
subject: Critique
subject: Théâtre
subject: Genre dramatique
subject: Monarchie de Juillet

description: Ce numéro rassemble l'intégralité des articles de critique dramatique rédigés par Alexandre Dumas de 1836 à 1838. Il plonge au cœur de l'actualité théâtrale de cette époque et révèle des analyses qui éclairent sous un nouveau jour le théâtre et l'ensemble de la production littéraire de Dumas.
Selected Tracking Technologies and Sensor Integrations witin the Easy Reading framework
Creators: name: Parker, Stefan
Publisher: name: Zenodo
Year: 2019
Subjects: Accessibility
User tracking

description: This deliverable gives a short overview of the state of the art in user tracking by discussing a few
 examples of existing systems for web tracking (Google Analytics) and emotion detection (Face
 Reader, EQ Radio). It then gives an overview of existing related EU funded research, also giving an
 “Of interest rating” from the view of the Easy Reading project.
Surface and zeta potentials of charged permeable nanocoatings
Creators: name: Silkina, Elena F.
name: Bag, Naren
name: Vinogradova, Olga I.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: An electrokinetic (zeta) potential of charged permeable porous films on solid supports generally exceeds their surface potential, which often builds up to a quite high value itself. Recent work provided a quantitative understanding of zeta potentials of thick, compared to the extension of an inner electrostatic diffuse layer, porous films. Here, we consider porous coatings of a thickness comparable or smaller than that of the inner diffuse layer. Our theory, which is valid even when electrostatic potentials become quite high and accounts for a finite hydrodynamic permeability of the porous materials, provides a framework for interpreting the difference between values of surface and zeta potentials in various situations. Analytic approximations for the zeta potential in the experimentally relevant limits provide a simple explanation of transitions between different regimes of electro-osmotic flows, and also suggest strategies for its tuning in microfluidic applications.
Specifications of the user profile within the Easy Reading project
Creators: name: Errson, Linus
Publisher: name: Zenodo
Year: 2019
Subjects: Accessibility
Cognitive disabilities
User profiling

description: This deliverable gives a short overview of how the user profile can be setup by four main parts; personal information, cognitive impairments, user status recorded by direct time tracking and settings for the interaction concepts and modes. It describes what parts of the profile can be setup and edited by the user and care taker and what parts will be affected by the real time user tracking. It also describes how the profile will influence which tools will be suggested to the user and the settings of these tools