cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Ecophysiological Basis of Lizards Geographic Distribution
Creators: name: de Oliveira Anderson, Rodolfo
Publisher: name: Monash University
Year: 2023
Subjects: Animal physiological ecology
Zoology not elsewhere classified
Biogeography and phylogeography

description: The mechanisms underlying species distribution have puzzled ecologists and evolutionary biologists for decades. As climate is a key factor influencing geographic distributions and determining range limits, understanding physiological interactions with climate can highlight how species manage to live where they live. In my thesis, I evaluated how interactions between physiology and climate shape the distribution of lizards. I provide a comprehensive analysis of how climate at global scales affect the physiology and survival of lizards, and how these animals modulate their physiology across geographic gradients (altitude and latitude). I highlight potential ecophysiological mechanisms that might influence the distribution of lizards.
Relating spin-polarized STM imaging and inelastic neutron scattering in the van-der-Waals ferromagnet Fe3GeTe2
Creators: name: Trainer, Christopher
name: Armitage, Olivia R.
name: Lane, Harry
name: Rhodes, Luke C.
name: Chan, Edmond
name: Benedičič, Izidor
name: Rodriguez-Rivera, Jose A.
name: Fabelo, Oscar
name: Stock, Chris
name: Wahl, Peter
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Van-der-Waals (vdW) ferromagnets have enabled the development of heterostructures assembled from exfoliated monolayers with spintronics functionalities, making it important to understand and ultimately tune their magnetic properties at the microscopic level. Information about the magnetic properties of these systems comes so far largely from macroscopic techniques, with little being known about the microscopic magnetic properties. Here, we combine spin-polarized scanning tunneling microscopy and quasi-particle interference imaging with neutron scattering to establish the magnetic and electronic properties of the metallic vdW ferromagnet Fe3GeTe2. By imaging domain walls at the atomic scale, we can relate the domain wall width to the exchange interaction and magnetic anisotropy extracted from the magnon dispersion as measured in inelastic neutron scattering, with excellent agreement between the two techniques. From comparison with Density Functional Theory calculations we can assign the quasi-particle interference to be dominated by spin-majority bands. We find a dimensional dichotomy of the bands at the Fermi energy: bands of minority character are predominantly two-dimensional in character, whereas the bands of majority character are three-dimensional. We expect that this will enable new design principles for spintronics devices.
description: 18 pages main manuscript with 5 figures plus 12 pages supplementary
Veiled symmetry of disordered Parity-Time lattices: protected PT-threshold and the fate of localization
Creators: name: Harter, Andrew K.
name: Onanga, Franck A.
name: Joglekar, Yogesh N.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: Other Condensed Matter (cond-mat.other)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Open, non-equilibrium systems with balanced gain and loss, known as parity-time ($\mathcal{PT}$)-symmetric systems, exhibit properties that are absent in closed, isolated systems. A key property is the $\mathcal{PT}$-symmetry breaking transition, which occurs when the gain-loss strength, a measure of the openness of the system, exceeds the intrinsic energy-scale of the system. We analyze the fate of this transition in disordered lattices with non-Hermitian gain and loss potentials $\pm iγ$ at reflection-symmetric sites. Contrary to the popular belief, we show that the $\mathcal{PT}$-symmetric phase is protected in the presence of a correlated (periodic) disorder which leads to a positive $\mathcal{PT}$-symmetry breaking threshold. We uncover a veiled symmetry of such disordered systems that is instrumental for the said protection, and show that this symmetry leads to new localization behavior across the $\mathcal{PT}$-symmetry breaking transition. We elucidate the interplay between such localization and the $\mathcal{PT}$-symmetry breaking phenomena in disordered $\mathcal{PT}$-symmetric lattices, and support our conclusions with a beam-propagation-method analysis. Our theoretical predictions provide avenues for experimental realizations of $\mathcal{PT}$-symmetric systems with engineered disorder.
description: 10 pages, 4 figures
Density vs distance for the DUNE beam from two recent geology density maps
Creators: name: Roe, Byron P.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Geophysics (physics.geo-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The densities passed through for neutrinos going from Fermilab to Sanford lab are obtained using two recent density tables, crustal [1] and Shen-Ritzwoller[2], as well as the values from an older table PEMC[3].
Thermodynamics of correlated electrons in a magnetic field
Creators: name: Ding, Jixun K.
name: Wang, Wen O.
name: Moritz, Brian
name: Schattner, Yoni
name: Huang, Edwin W.
name: Devereaux, Thomas P.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The Hofstadter-Hubbard model captures the physics of strongly correlated electrons in an applied magnetic field, which is relevant to many recent experiments on Moiré materials. Few large-scale, numerically exact simulations exists for this model. In this work, we simulate the Hubbard-Hofstadter model using the determinant quantum Monte Carlo (DQMC) algorithm. We report the field and Hubbard interaction strength dependence of charge compressibility, fermion sign, local moment, magnetic structure factor, and specific heat. The gross structure of magnetic Bloch bands and band gaps determined by the non-interacting Hofstadter spectrum is preserved in the presence of $U$. Incompressible regions of the phase diagram have improved fermion sign. At half filling and intermediate and larger couplings, a strong orbital magnetic field delocalizes electrons and reduces the effect of Hubbard $U$ on thermodynamic properties of the system.
description: v2: 11 pages, 7 figures; accepted version
Semilocal exchange hole with an application to range-separation density functional
Creators: name: Tao, Jianmin
name: Bulik, Ireneusz W.
name: Scuseria, Gustavo E.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: Exchange-correlation hole is a central concept in density functional theory. It not only provides justification for an exchange-correlation energy functional, but also serves as a local ingredient in nonlocal range-separation density functional. However, due to the nonlocal nature, modelig the conventional exact exchange hole presents a great challenge to density functional theory. In this work, we propose a semilocal exchange hole underlying the Tao-Perdew-Staroverov-Scuseria (TPSS) meta-GGA functional. The present model is distinct from previous models at small separation between an electron and the hole around the electron. It is also different in the way it interpolates between the rapidly varying iso-orbital density and the slowly varying density, which is determined by the wave vector analysis based on the exactly solvable infinite barrier model for jellium surface. Our numerical tests show that the exchange hole generated from this model mimics the conventional exact exchange hole quite well for atoms. Finally, as a simple application, we apply the hole model to construct a TPSS-based range-separation functional. Our tests show that this TPSS-based range-separation functional can substantially improve TPSS band gaps and barrier heights, without losing much accuracy of molecular atomization energies.
description: 12 pages, 9 figures
Non-Hermiticity stabilized Majorana zero modes in semiconductor-superconductor nanowires
Creators: name: Liu, Hongchao
name: Lu, Ming
name: Wu, Yijia
name: Liu, Jie
name: Xie, X. C.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Coupled Majorana zero modes with nonzero energies are generally detrimental to the non-Abelian statistics due to the additional dynamic phase. Nevertheless, we show that a well-connected lead can introduce a local non-Hermitian dissipation term to shift the energies of the both coupled Majorana modes to zero, and surprisingly turn the coupled Majorana mode far from the lead into a dark Majorana mode with exponentially small dissipation. This dark Majorana mode can conquer the drawback of the partially overlapped Majorana zero modes and possess the properties of true Majorana zero mode such as the perfect fractional Josephson effect and the non-Abelian statistics.
description: 6 pages, 4 figures
Long-range spin correlations in a honeycomb spin model with magnetic field
Creators: name: Lunkin, A. V.
name: Tikhonov, K. S.
name: Feigel'man, M. V.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We consider spin-$\frac{1}{2}$ model on the honeycomb lattice in the presence of weak magnetic field $h\ll J$. Such a perturbation treated in the second order over $h$ leads to the power-law decay of irreducible spin correlation function $S(\mathbf{r},t)=\left\langle \left\langle s^{z}_r(t)s^{z}_0(0)\right\rangle \right\rangle \propto h_{z}^{2}f(t,\mathbf{r})$, where $f(t,\mathbf{r})\propto \lbrack \max (t,Jr)]^{-4}$ is an oscillating function of $\mathbf{r}$, with a wavelength equal to 3 lattice constants. In the present Letter we sum main terms in all orders of the perturbation theory for the correlation function $S(\mathbf{r},t)$ in the limit of large $r,t$. Our results can be understood in terms of the effective low-energy Hamiltonian written in terms of Majorana fermions, which in the presence of magnetic field acquire vector potential $A_x \propto h_z^2$. Correspondingly, the wave vector of the oscillations in $S(\mathbf{r},t)$ changes according to $δk \propto h_z^2$. We also compute the dynamic structure factor $S(\mathbf{p},ω)$; in the vicinity of $\mathbf{p}_K$ corresponding to the inter-conical points excitations it reads as $S(\mathbf{p},ω)-S(\mathbf{p}_K,ω)\propto\sqrt{ω^2-3J^2(\mathbf{p}-\mathbf{p}_K)^2}$.
description: 8 pages, 2 figures. Extended and corrected version of the paper published in JETP Lett. v.103, p.117 (2016)
C II radiative cooling of the Galactic diffuse interstellar medium: Insight about the star formation in Damped Lyman-alpha systems
Creators: name: Roy, Nirupam
name: Frank, Stephan
name: Carilli, Christopher L.
name: Mathur, Smita
name: Menten, Karl M.
name: Wolfe, Arthur M.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The far-infrared [C II] 158 micrometer fine structure transition is considered to be a dominant coolant in the interstellar medium. For this reason, under the assumption of a thermal steady state, it may be used to infer the heating rate and, in turn, the star formation rate in local, as well as in high redshift systems. In this work, radio and ultraviolet observations of the Galactic interstellar medium are used to understand whether C II is indeed a good tracer of the star formation rate. For a sample of high Galactic latitude sightlines, direct measurements of the temperature indicate the presence of C II in both the cold and the warm phases of the diffuse interstellar gas. The cold gas fraction (~ 10 - 50% of the total neutral gas column density) is not negligible even at high Galactic latitude. It is shown that, to correctly estimate the star formation rate, C II cooling in both the phases should hence be considered. The simple assumption, that the [C II] line originates only from either the cold or the warm phase, significantly underpredicts or overpredicts the star formation rate, respectively. These results are particularly important in the context of the Damped Lyman-alpha systems for which a similar method is often used to estimate the star formation rate. The derived star formation rates in such cases may not be reliable if the temperature of the gas under consideration is not constrained independently.
description: 16 pages, 3 tables, 9 figures. Accepted for publication in ApJ. The definitive version will be available at http://iopscience.iop.org/0004-637X
On conic-line arrangements with nodes, tacnodes, and ordinary triple points
Creators: name: Dimca, Alexandru
name: Pokora, Piotr
Publisher: name: arXiv
Year: 2021
Subjects: subject: Algebraic Geometry (math.AG)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 14N20, 14C20, 32S22

description: In the present paper, we study conic-line arrangements having nodes, tacnodes, and ordinary triple points as singularities. We provide combinatorial constraints on such arrangements and we give the complete classification of free arrangements in this class.
description: 24 pages, 2 figures, a minor revision incorporating referee's remarks
GTnum PERSEUS #InteractionHybridation - Influences transformatives sur l'écosystème scolaire
Creators: name: Vitel, Sylvie
name: Ciré, Isabelle
name: Keller, Lola
Publisher: name: Zenodo
Year: 2023
Subjects: Influences transformatives
Ecosystème scolaire

description: Une infographie reprenant les points clefs du cahier d'expérience portant sur les influences transformatives sur l'écosystème scolaire.
Using Shapley Values and Variational Autoencoders to Explain Predictive Models with Dependent Mixed Features
Creators: name: Olsen, Lars Henry Berge
name: Glad, Ingrid Kristine
name: Jullum, Martin
name: Aas, Kjersti
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (stat.ML)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Shapley values are today extensively used as a model-agnostic explanation framework to explain complex predictive machine learning models. Shapley values have desirable theoretical properties and a sound mathematical foundation in the field of cooperative game theory. Precise Shapley value estimates for dependent data rely on accurate modeling of the dependencies between all feature combinations. In this paper, we use a variational autoencoder with arbitrary conditioning (VAEAC) to model all feature dependencies simultaneously. We demonstrate through comprehensive simulation studies that our VAEAC approach to Shapley value estimation outperforms the state-of-the-art methods for a wide range of settings for both continuous and mixed dependent features. For high-dimensional settings, our VAEAC approach with a non-uniform masking scheme significantly outperforms competing methods. Finally, we apply our VAEAC approach to estimate Shapley value explanations for the Abalone data set from the UCI Machine Learning Repository.
Review of Integrated Piezoceramic Transducers in Smart Materials and Structures
Creators: name: Liew, Chin Kian
name: Veidt, M
Publisher: name: Singapore Institute of Technology
Year: 2023
Subjects: Mechanical engineering not elsewhere classified

description: There has been extensive research to study and improve the integration of piezoelectric elements in smart materials and structures since the early 1990s. The unique properties of piezoceramics to efficiently generate an electric potential from an induced mechanical strain while reversibly, produce stress from an applied voltage, appropriately placed these elements as favoured sensors and actuators. Research is also motivated by commercial interests in noise and vibration control, shape control, and structural damping, particularly for civil and aerospace applications. In the last decade, the field has extended to structural health monitoring for the detection and quantitative evaluation of in-service and manufacturing defects. This short review arrives in a timely manner to outline the present progress of the technology by compiling the studies conducted and summarising the significant contributions made. Fabrication and manufacturing methods for piezoceramic attachment are consolidated while addressing the aspects of material selection, safe design, performance and durability. This is followed by the descriptions of testing techniques available to simulate in-service loading and to evaluate the manufactured smart product through various measured parameters. Important test results and analysis from past studies are presented to understand the failure modes and the operation limits. Literature on key modelling approaches to study the integrated piezoceramic transducers are briefly highlighted, showing the evolution of the simple analytical one-dimensional models to more complex and numerical two/three-dimensional models.
Redefining part-of-speech classes with distributional semantic models
Creators: name: Kutuzov, Andrey
name: Velldal, Erik
name: Øvrelid, Lilja
Publisher: name: arXiv
Year: 2016
Subjects: subject: Computation and Language (cs.CL)
subject: FOS: Computer and information sciences

description: This paper studies how word embeddings trained on the British National Corpus interact with part of speech boundaries. Our work targets the Universal PoS tag set, which is currently actively being used for annotation of a range of languages. We experiment with training classifiers for predicting PoS tags for words based on their embeddings. The results show that the information about PoS affiliation contained in the distributional vectors allows us to discover groups of words with distributional patterns that differ from other words of the same part of speech. This data often reveals hidden inconsistencies of the annotation process or guidelines. At the same time, it supports the notion of `soft' or `graded' part of speech affiliations. Finally, we show that information about PoS is distributed among dozens of vector components, not limited to only one or two features.
GTnum PERSEUS #InteractionHybridation - Accompagnement des formateurs
Creators: name: Promonet, Aurore
name: Rondelli, Fabienne
name: Ciré, Isabelle
name: Keller, Lola
Publisher: name: Zenodo
Year: 2023
Subjects: Accompagnement
Formateurs
INSPE

description: Infographie sur l'accompagnement qui a été proposé aux formateurs de l'INSPE de Lorraine au cours du premier confinement (entre mars et juin 2020).
Linear power corrections for two-body kinematics in the $q_T$ subtraction formalism
Creators: name: Buonocore, Luca
name: Kallweit, Stefan
name: Rottoli, Luca
name: Wiesemann, Marius
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Transverse-momentum cuts on undistinguished particles in two-body final states induce an enhanced sensitivity to low momentum scales. This undesirable feature, which ultimately leads to an instability of the fixed-order series, poses additional challenges to non-local subtraction schemes. In this letter, we address this issue for general colour-singlet processes within the $q_T$-subtraction formalism, focussing on neutral-current Drell-Yan production. We present a simple procedure to reduce the dependence on the slicing parameter from linear to quadratic, by accounting for the linear power corrections through an appropriate recoil prescription. We observe a dramatical improvement of the numerical convergence and a reduction of the systematic uncertainties. We also discuss how a linear dependence in $q_T$ can be avoided for Drell-Yan production by using staggered cuts, which, to the best of our understanding, could be used in experimental analyses. We show that our approach can be successfully applied also to on-shell $ZZ$ production. We finally study diphoton production and verify that our approach is insufficient to capture the linear power corrections introduced by the isolation procedure. The recoil prescription is available in version 2.1 of MATRIX.
description: 11 pages, 9 figures. Added comparison with local subtraction at NNLO. Version published in Phys.Lett.B
Noncommutative resolutions using syzygies
Creators: name: Dao, Hailong
name: Iyama, Osamu
name: Iyengar, Srikanth B.
name: Takahashi, Ryo
name: Wemyss, Michael
name: Yoshino, Yuji
Publisher: name: arXiv
Year: 2016
Subjects: subject: Representation Theory (math.RT)
subject: Commutative Algebra (math.AC)
subject: FOS: Mathematics

description: Given a noether algebra with a noncommutative resolution, a general construction of new noncommutative resolutions is given. As an application, it is proved that any finite length module over a regular local or polynomial ring gives rise, via suitable syzygies, to a noncommutative resolution.
description: 5 pages
Near infrared spectroscopy of red supergiants in NGC 6822, IC 10 & WLM with EMIR
Creators: name: Christodoulou, Evangelia
name: Bonanos, Alceste
name: Sanchez, Gonzalo Munoz
name: De Wit, Stephan
name: Grigoris Maravelias
name: Alvarez, David Garcia
name: Antoniadis, Kostas
Publisher: name: Zenodo
Year: 2023

description: The role of episodic mass loss in the evolution of massive stars remains largely unknown and thus it is not included in the stellar models. The ASSESS project is conducting an optical survey in the nearby Universe (12 galaxies with Z ~ 0.1 to 1.5 Zo) searching for evolved massive stars, primarily targeting those with infrared excess (i.e. circumstellar dust) which reveals mass loss. The results of this survey in the northern hemisphere have led to the secure spectral classification of twelve red supergiants (RSGs) in NGC 6822 and IC 10 (Ζ= 0.32 Zo and 0.45 Zo). Follow up spectroscopy has been acquired in the J-band for eight of them using the EMIR detector at the Grand Telescope of the Canarias. Also, we observed one target from the literature (WLM 14), expanding our metallicity range to 0.14 Zo, as we aim to study mass loss in the low metallicity regime. Such observations are needed because the effective temperature (Teff) measured from atomic lines in the J-band is more accurate than the one estimated using the TiO bands present in the optical spectra, as the latter form at larger radii and lower temperatures. Improved Teff estimations lead to more robust estimations of mass loss. We aspire to calibrate the temperature scale of RSG at low metallicities and use it to obtain mass loss measurements for the rest of our sample (~ 130 RSGs) for which infrared spectroscopy is not feasible. I will present initial results from the analysis of these observations.
Monster book club; or, monster mythologies in young adult literature: a digital ethnography
Creators: name: Kellett, Kathleen
Publisher: name: No Publisher Supplied
Year: 2023

description: This ethnographic study interrogates youth understandings of the concept of “monstrosity” as presented in young adult speculative fiction novels and as it pertains to contemporary U.S. politics. The monster is a popular figure in fiction for adolescents, and it often serves a metaphorical political function within its narratives. This study broadens the theoretical approaches to scholarship about monstrosity by incorporating youth theories into ongoing conversations about metaphor, affect, and literary representation as they pertain to the monster. Twelve participants from the ages of 14 to 18 participated in a six-month digital book club, held on the social networking site Discord. Participants discussed 11 young adult novels featuring monsters published during or after 2015 to determine how the construct of the “monster” functions as a means of both creating and understanding contemporary political ideologies. As the facilitator of the book club, I analyzed the themes of the participants’ conversations and put them into scholarly context, resulting in three overarching definitions of monstrosity developed through the youth theory: invisible monsters (or monstrous internal affective forces), the monstrous oppressed, and monstrous oppressors. An emotion-based understanding of the monster mythology emerged, in which the heightened narrative of the attacking monster, the innocent victim, and the courageous hero are used to organize understandings of cultural fears and harms. These theories cross disciplinary boundaries and open new avenues for the study of monstrosity. This study also puts forth an argument for the inclusion of youth theory in the study of children’s and young adult literature, as well as the benefits of media-based political research with minors.
Orbifold points on Teichmüller curves and Jacobians with complex multiplication
Creators: name: Mukamel, Ronen E.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Geometric Topology (math.GT)
subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 32G15, 14K22

description: For each integer $D \geq 5$ with $D \equiv 0$ or $1 \bmod 4$, the Weierstrass curve $W_D$ is an algebraic curve and a finite volume hyperbolic orbifold which admits an algebraic and isometric immersion into the moduli space of genus two Riemann surfaces. The Weierstrass curves are the main examples of Teichmüller curves in genus two. The primary goal of this paper is to determine the number and type of orbifold points on each component of $W_D$. Our enumeration of the orbifold points, together with work of Bainbridge and McMullen, completes the determination of the homeomorphism type of $W_D$ and gives a formula for the genus of its components. We use our formula to give bounds on the genus of $W_D$ and determine the Weierstrass curves of genus zero. We will also give several explicit descriptions of each surface labeled by an orbifold point on $W_D$.
GTnum PERSEUS #InteractionHybridation - Effets du distanciel sur les pratiques des formateurs
Creators: name: Promonet, Aurore
name: Rondelli, Fabienne
name: Villers, Pierre
name: Ciré, Isabelle
name: Keller, Lola
Publisher: name: Zenodo
Year: 2023
Subjects: Distanciel
Formateurs
INSPE

description: Une infographie reprenant des réponses au questionnaire sur les effets du distanciel sur les pratiques des formateurs. Il a été réalisé en mai 2021 sur les INSPE (Institut National Supérieur du Professorat et de l'Education) de Nancy-Metz et Lyon.
Quark-diquark potential and diquark mass from Lattice QCD
Creators: name: Watanabe, Kai
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We propose a new application of lattice QCD to calculate the quark-diquark potential, diquark mass and quark mass required for the diquark model. As a concrete example, we consider the $Λ_c$ baryon and treat it as a charm-diquark($c$-[$ud$]) two-body bound state. We extend the HAL QCD method to calculate the charm-diquark potential which reproduces the equal-time Nambu-Bethe-Salpeter wave function of the S-wave state ($Λ_c(\frac12^+)$). The diquark mass is determined so as to reproduce the difference between the S-wave and the spin-orbit averaged P-wave energies, i.e. the difference between the $Λ_c(\frac12^+)$ level and the average of the $Λ_c(\frac12^-)$ and the $Λ_c(\frac32^-)$ levels. Numerical calculations are performed on a $32^3\times 64$ lattice with lattice spacing of $a \simeq 0.0907$ fm and the pion mass of $m_π \simeq 700$ MeV. Our charm-diquark potential is given by the Coulomb+linear (Cornell) potential where the long range behavior is consistent with the charm-anticharm potential while the Coulomb attraction is considerably smaller. This weakening of the attraction may be attributed to the diquark size effect. The obtained diquark mass is $m_D=1.273(44)$ GeV. Our diquark mass lies slightly above the conventional estimates, namely the $ρ$ meson mass and twice the constituent quark mass $2m_N/3$.
description: 14 pages, 15 figures. Revised on 2022 March 4th. Minor changes were made to align with the version published in PRD.[Augast 14th]
Watching the IPv6 Takeoff from an IXP's Viewpoint
Creators: name: Kim, Juhoon
name: Sarrar, Nadi
name: Feldmann, Anja
Publisher: name: Technische Universität Berlin
Year: 2014
Subjects: subject: 004 Datenverarbeitung; Informatik
subject: IPv6
subject: IPv4
subject: internet traffic
subject: IXP
subject: European Internet Exchange Point

description: The different level of interest in deploying the new Internet address space across network operators has kept IPv6 tardy in its deployment. However, since the last block of IPv4 addresses has been assigned, Internet communities took the concern of the address space scarcity seriously and started to move forward actively. After the successful IPv6 test on 8 June, 2011 (World IPv6 Day [1]), network operators and service/content providers were brought together for preparing the next step of the IPv6 global deployment (World IPv6 Launch on 6 June, 2012 [2]). The main purpose of the event was to permanently enable their IPv6 connectivity. In this paper, based on the Internet traffic collected from a large European Internet Exchange Point (IXP), we present the status of IPv6 traffic mainly focusing on the periods of the two global IPv6 events. Our results show that IPv6 traffic is responsible for a small fraction such as 0.5% of the total traffic in the peak period. Nevertheless, we are positively impressed by the facts that the increase of IPv6 traffic/prefixes shows a steep increase and that the application mix of IPv6 traffic starts to imitate the one of IPv4-dominated Internet.
Analysis and Assessment of Pre- and Post-Test Survey Results  for Climate Change and Green Skills Modules in an Educational App
Creators: name: Rañola, Elmer
Publisher: name: Zenodo
Year: 2025
Subjects: subject: Gamification
subject: Climate Change

description: This research investigates the potentials of the Hope Town Hero (HTH) app as an innovative tool to promote green skills and climate change education among children and youth. Grounded in the urgent need for widespread climate literacy, this study examines the effectiveness of integrating education into educational strategies, with a particular focus on the Philippines. The research method employs pre- and post-test surveys, qualitative feedback, and demographic data to assess the app’s effectiveness. Quantitative analysis reveals trends in knowledge acquisition and behavioral intentions, while qualitative insights from user feedback inform recommendations for enhancing the app. Findings show significant improvements in users’ understanding of green skills and climate issues. Recommendations include refining the user experience, expanding content coverage, and conducting longitudinal studies to evaluate long-term impacts. The research concludes that educational apps like HTH hold substantial promise in equipping the next generation with the knowledge and skills needed to address climate challenges effectively.
Variational Learning for Unsupervised Knowledge Grounded Dialogs
Creators: name: Mishra, Mayank
name: Madan, Dhiraj
name: Pandey, Gaurav
name: Contractor, Danish
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computation and Language (cs.CL)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Recent methods for knowledge grounded dialogs generate responses by incorporating information from an external textual document. These methods do not require the exact document to be known during training and rely on the use of a retrieval system to fetch relevant documents from a large index. The documents used to generate the responses are modeled as latent variables whose prior probabilities need to be estimated. Models such as RAG and REALM, marginalize the document probabilities over the documents retrieved from the index to define the log likelihood loss function which is optimized end-to-end. In this paper, we develop a variational approach to the above technique wherein, we instead maximize the Evidence Lower bound (ELBO). Using a collection of three publicly available open-conversation datasets, we demonstrate how the posterior distribution, that has information from the ground-truth response, allows for a better approximation of the objective function during training. To overcome the challenges associated with sampling over a large knowledge collection, we develop an efficient approach to approximate the ELBO. To the best of our knowledge we are the first to apply variational training for open-scale unsupervised knowledge grounded dialog systems.
Meta-analysis of two studies in the presence of heterogeneity with applications in rare diseases
Creators: name: Friede, Tim
name: Röver, Christian
name: Wandel, Simon
name: Neuenschwander, Beat
Publisher: name: arXiv
Year: 2016
Subjects: subject: Methodology (stat.ME)
subject: FOS: Computer and information sciences

description: Random-effects meta-analyses are used to combine evidence of treatment effects from multiple studies. Since treatment effects may vary across trials due to differences in study characteristics, heterogeneity in treatment effects between studies must be accounted for to achieve valid inference. The standard model for random-effects meta-analysis assumes approximately normal effect estimates and a normal random-effects model. However, standard methods based on this model ignore the uncertainty in estimating the between-trial heterogeneity. In the special setting of only two studies and in the presence of heterogeneity we investigate here alternatives such as the Hartung-Knapp-Sidik-Jonkman method (HKSJ), the modified Knapp-Hartung method (mKH, a variation of the HKSJ method) and Bayesian random-effects meta-analyses with priors covering plausible heterogeneity values. The properties of these methods are assessed by applying them to five examples from various rare diseases and by a simulation study. Whereas the standard method based on normal quantiles has poor coverage, the HKSJ and mKH generally lead to very long, and therefore inconclusive, confidence intervals. The Bayesian intervals on the whole show satisfying properties and offer a reasonable compromise between these two extremes.
description: 12 pages, 4 figures
Reconstructions of $f(T)$ Gravity from Entropy Corrected Holographic and New Agegraphic Dark Energy Models in Power-law and Logarithmic Versions
Creators: name: Saha, Pameli
name: Debnath, Ujjal
Publisher: name: arXiv
Year: 2016
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Here, we peruse cosmological usage of the most promising candidates of dark energy in the framework of $f(T)$ gravity theory. We reconstruct the different $f(T)$ modifed gravity models in the spatially flat FRW universe according to entropy-corrected versions of the holographic and new agegraphic dark energy models in power-law and logarithmic corrections, which describe accelerated expansion history of the universe. We conclude that the equation of state parameter of the entropy-corrected models can transit from quintessence state to phantom regime as indicated by recent observations or can lie entirely in the phantom region. Also, using these models, we investigate the different erase of the stability with the help of the squared speed of sound.
description: 20 pages, 40 figures, Accepted in EPJC. arXiv admin note: text overlap with arXiv:1004.1805 by other authors
A Survey of Robot Manipulation in Contact
Creators: name: Suomalainen, Markku
name: Karayiannidis, Yiannis
name: Kyrki, Ville
Publisher: name: arXiv
Year: 2021
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: In this survey, we present the current status on robots performing manipulation tasks that require varying contact with the environment, such that the robot must either implicitly or explicitly control the contact force with the environment to complete the task. Robots can perform more and more manipulation tasks that are still done by humans, and there is a growing number of publications on the topics of 1) performing tasks that always require contact and 2) mitigating uncertainty by leveraging the environment in tasks that, under perfect information, could be performed without contact. The recent trends have seen robots perform tasks earlier left for humans, such as massage, and in the classical tasks, such as peg-in-hole, there is a more efficient generalization to other similar tasks, better error tolerance, and faster planning or learning of the tasks. Thus, in this survey we cover the current stage of robots performing such tasks, starting from surveying all the different in-contact tasks robots can perform, observing how these tasks are controlled and represented, and finally presenting the learning and planning of the skills required to complete these tasks.
description: Accepted for publication in Robotics and Autonomous Systems
A Broken Translational Symmetry State in an Infinite-Layer Nickelate
Creators: name: Rossi, Matteo
name: Osada, Motoki
name: Choi, Jaewon
name: Agrestini, Stefano
name: Jost, Daniel
name: Lee, Yonghun
name: Lu, Haiyu
name: Wang, Bai Yang
name: Lee, Kyuho
name: Nag, Abhishek
name: Chuang, Yi-De
name: Kuo, Cheng-Tai
name: Lee, Sang-Jun
name: Moritz, Brian
name: Devereaux, Thomas P.
name: Shen, Zhi-Xun
name: Lee, Jun-Sik
name: Zhou, Ke-Jin
name: Hwang, Harold Y.
name: Lee, Wei-Sheng
Publisher: name: arXiv
Year: 2021
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: A defining signature of strongly correlated electronic systems is the existence of competing phases with similar ground state energies, resulting in a rich phase diagram. While in the recently discovered nickelate superconductors, a high antiferromagnetic exchange energy has been reported, which implies the existence of strong electronic correlations, signatures of competing phases have not yet been observed. Here, we uncover a charge order (CO) in infinite-layer nickelates La1-xSrxNiO2 using resonant x-ray scattering across the Ni L-edge. In the parent compound, the CO arranges along the Ni-O bond direction with an incommensurate wave vector (0.344+/-0.002, 0) r.l.u., distinct from the stripe order in other nickelates which propagates along a direction 45 degree to the Ni-O bond. The CO resonance profile indicates that CO originates from the Ni 3d states and induces a parasitic charge modulation of La electrons. Upon doping, the CO diminishes and the ordering wave vector shifts toward a commensurate value of 1/3 r.l.u., indicating that the CO likely arises from strong correlation effects and not from Fermi surface nesting.
description: 24 pages, 8 figures
The awakening of the gamma-ray narrow-Line Seyfert 1 galaxy PKS 1502+036
Creators: name: D'Ammando, F.
name: Orienti, M.
name: Finke, J.
name: Hovatta, T.
name: Giroletti, M.
name: Max-Moerbeck, W.
name: Pearson, T. J.
name: Readhead, A. C. S.
name: Reeves, R. A.
name: Richards, J. L.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: After a long low-activity period, a gamma-ray flare from the narrow-line Seyfert 1 PKS 1502+036 (z=0.4089) was detected by the Large Area Telescope (LAT) on board Fermi in 2015. On 2015 December 20 the source reached a daily peak flux, in the 0.1-300 GeV band, of (93 $\pm$ 19) $\times$10$^{-8}$ ph cm$^{-2}$ s$^{-1}$, attaining a flux of (237 $\pm$ 71) $\times$10$^{-8}$ ph cm$^{-2}$ s$^{-1}$ on 3-hr time-scales, which corresponds to an isotropic luminosity of (7.3 $\pm$ 2.1) $\times$10$^{47}$ erg/s. The gamma-ray flare was not accompanied by significant spectral changes. We report on multi-wavelength radio-to-gamma-ray observations of PKS 1502+036 during 2008 August-2016 March by Fermi-LAT, Swift, XMM-Newton, Catalina Real-Time Transient Survey, and the Owens Valley Radio Observatory (OVRO). An increase in activity was observed on 2015 December 22 by Swift in optical, UV, and X-rays. The OVRO 15 GHz light curve reached the highest flux density observed from this source on 2016 January 12, indicating a delay of about three weeks between the gamma-ray and 15 GHz emission peaks. This suggests that the gamma-ray emitting region is located beyond the broad line region. We compared the spectral energy distribution (SED) of an average activity state with that of the flaring state. The two SED, with the high-energy bump modelled as an external Compton component with seed photons from a dust torus, could be fitted by changing the electron distribution parameters as well as the magnetic field. The fit of the disc emission during the average state constrains the black hole mass to values lower than 10$^8$ solar masses. The SED, high-energy emission mechanisms, and gamma-ray properties of the source resemble those of a flat spectrum radio quasar.
description: 13 pages, 4 tables, 7 figures. Accepted for publication in the Monthly Notices of the Royal Astronomical Society. arXiv admin note: text overlap with arXiv:1305.0572
Pre-main sequence evolution of low-mass stars in Eddington-inspired Born-Infeld gravity
Creators: name: Guerrero, Merce
name: Rubiera-Garcia, Diego
name: Wojnar, Aneta
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We study three aspects of the early-evolutionary phases in low-mass stars within Eddington-inspired Born-Infeld (EiBI) gravity, a viable extension of General Relativity. These aspects are concerned with the Hayashi tracks (i.e. the effective temperature-luminosity relation); the minimum mass required to belong to the main sequence; and the maximum mass allowed for a fully convective star within the main sequence. In all cases we find a dependence of these quantities not only on the theory's parameter, but also on the star's central density, a feature previously found in Palatini $f(R)$ gravity. Using this, we investigate the evolution of these quantities with the (sign of the) EiBI parameter, finding a shift in the Hayashi tracks in opposite directions in the positive/negative branches of it, and an increase (decrease) for positive (negative) parameter in the two masses above. We use these results to ellaborate on the chances to seek for traces of new physics in low-mass stars within this theory.
description: 11 pages, 3 figures
GTnum PERSEUS #InteractionHybridation - Qu'est-ce que l'interaction humain-machine ?
Creators: name: Kubicki, Sébastien
name: Hachet, Martin
name: Bertolo, David
name: Voillot, Marion
name: Fleck, Stéphanie
Publisher: name: Zenodo
Year: 2023
Subjects: Hybridation
Interaction Humain-Machine
IHM
Education
#GTnum
DNE

description: Bulletin de veille portant sur l'interaction humain-machine (IHM), un domaine de recherche qui se consacre à la conception, l'évaluation et la mise en œuvre de systèmes informatiques interactifs pour l'usage humain.
description: Les groupes thématiques numériques (GTnum) sont coordonnés par la Direction du numérique pour l'éducation du Ministère de l'Education nationale et de la Jeunesse. Les GTnum ont pour objectif de mettre à disposition des équipes éducatives, de façon accessible et ouverte, un état de la recherche sur quelques grandes thématiques relatives au numérique dans l'éducation. Financeur du projet:« Ministère de l'Éducation nationale et de la Jeunesse»
High-Resolution Structure and Intermolecular Interactions between L-type Straight Flagellar Filaments
Creators: name: Louzon, D.
name: Ginsburg, A.
name: Schwenger, W.
name: Dvir, T.
name: Dogic, Z.
name: Raviv, U.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Biomolecules (q-bio.BM)
subject: FOS: Biological sciences

description: Bacterial mobility is powered by rotation of helical flagellar filaments driven by rotary motors. Flagellin isolated from {\it Salmonella Typhimurium} SJW1660 strain, which differs by a point mutation from the wild-type strain, assembles into straight filaments in which flagellin monomers are arranged into left-handed helix. Using small-angle X-ray scattering (SAXS) and osmotic stress methods, we investigated the high-resolution structure of SJW1660 flagellar filaments as well as intermolecular forces that govern their assembly into dense hexagonal bundle. The scattering data were fitted to high-resolution models, which took into account the atomic structure of the flagellin subunits. The analysis revealed the exact helical arrangement and the super-helical twist of the flagellin subunits within the filaments. Under osmotic stress the filaments formed $2D$ hexagonal bundles. Monte-Carlo simulations and continuum theories were used to analyze the scattering data from hexagonal arrays, revealing how bulk modulus, as well as how the deflection length depends on the applied osmotic stress. Scattering data from aligned flagellar bundles confirmed the predicated structure-factor scattering peak line-shape. Quantitative analysis of the measured equation of state of the bundles revealed the contributions of the electrostatic, hydration, and elastic interactions to the intermolecular interactions associated with bundling of straight semi-flexible flagellar filaments.}%1 {Insert Received for publication Date and in final form Date.
Theory of plasmonic effects in nonlinear optics: the case of graphene
Creators: name: Rostami, Habib
name: Katsnelson, Mikhail I.
name: Polini, Marco
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We develop a microscopic large-$N$ theory of electron-electron interaction corrections to multi-legged Feynman diagrams describing second- and third-order nonlinear response functions. Our theory, which reduces to the well-known random phase approximation in the linear-response limit, is completely general and is useful to understand all second- and third-order nonlinear effects, including harmonic generation, wave mixing, and photon drag. We apply our theoretical framework to the case of graphene, by carrying out microscopic calculations of the second- and third-order nonlinear response functions of an interacting two-dimensional (2D) gas of massless Dirac fermions. We compare our results with recent measurements, where all-optical launching of graphene plasmons has been achieved by virtue of the finiteness of the quasi-homogeneous second-order nonlinear response of this inversion-symmetric 2D material.
The uniqueness of $PSU_3(8)$ in the Monster
Creators: name: Wilson, Robert A.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 20D08

description: As a contribution to an eventual solution of the problem of determination of the maximal subgroups of the Monster we show that there is a unique conjugacy class of subgroups isomorphic to $PSU_3(8)$. The argument depends on some computations in various subgroups, but not on computations in the Monster itself.