cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Global topological synchronization of weighted simplicial complexes
Creators: name: Wang, Runyue
name: Muolo, Riccardo
name: Carletti, Timoteo
name: Bianconi, Ginestra
Publisher: name: arXiv
Year: 2024
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: Higher-order networks are able to capture the many-body interactions present in complex systems and to unveil new fundamental phenomena revealing the rich interplay between topology, geometry, and dynamics. Simplicial complexes are higher-order networks that encode higher-order topology and dynamics of complex systems. Specifically, simplicial complexes can sustain topological signals, i.e., dynamical variables not only defined on nodes of the network but also on their edges, triangles, and so on. Topological signals can undergo collective phenomena such as synchronization, however, only some higher-order network topologies can sustain global synchronization of topological signals. Here we consider global topological synchronization of topological signals on weighted simplicial complexes. We demonstrate that topological signals can globally synchronize on weighted simplicial complexes, even if they are odd-dimensional, e.g., edge signals, overcoming thus a limitation of the unweighted case. These results thus demonstrate that weighted simplicial complexes are more advantageous for observing these collective phenomena than their unweighted counterpart. In particular, we present two weighted simplicial complexes the Weighted Triangulated Torus and the Weighted Waffle. We completely characterize their higher-order spectral properties and we demonstrate that, under suitable conditions on their weights, they can sustain global synchronization of edge signals. Our results are interpreted geometrically by showing, among the other results, that in some cases edge weights can be associated with the lengths of the sides of curved simplices.
description: 18 pages, 10 figures
Analysis of diagonal G and subspace W approximations within fully self-consistent GW calculations for bulk semiconducting systems
Creators: name: Singh, Yashpal
name: Wang, Lin-Wang
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Other Condensed Matter (cond-mat.other)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: Fully self-consistent GW (sc-GW) methods are now available to evaluate quasiparticle and spectral properties of various molecular and bulk systems. However, such techniques based on the full matrix of G and W are computationally demanding. The routinely used single-shot GW-approximation (G0W0) has an undesirable dependency on the choice of initial exchange-correlation functional. In the literature, many so-called self-consistent GW methods are based on diagonal approximation of G and low-ranking approximation of W. It is thus worth to check how good such approximations are in comparison with the full matrix method. In this work, we consider AlAs, AlP, GaP, and ZnS as the prototype systems to perform sc-GW calculations by expressing the full G matrix using a plane-wave basis set. We compared our sc-GW results with the diagonal G and subspace W approximated sc-GW results (sc-GW-diagG and sc-GW-subW methods). In the sc-GW-diagG method, interacting G is expanded in the eigenvectors of non-interacting G such that only diagonal elements are retained, whereas, the number of eigenmodes is truncated in sc-GW-subW calculations. A systematic analysis of the results obtained from the above techniques is presented. The differences in the quasiparticle bandgap between the approximated and the full matrix sc-GW approaches are mostly less than 1.7% that validates such widely adopted approximations, and also shows how such low-ranking approximation can be used to include higher-order terms like the vertex correction.
Landau-Khalatnikov-Fradkin Transformation and Even zeta Functions
Creators: name: Kotikov, A. V.
name: Teber, S.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: An exact formula that relates standard zeta functions and so-called hatted zeta functions in all orders of perturbation theory is presented. This formula is based on the Landau-Khalatnikov-Fradkin transformation
description: 5 pages; contribution to the proceedings of the Session-Conference of Nuclear Physics Section at the Department of Physical Sciences, Russian Academy of Sciences (March 10-12, 2020; Novosibirsk, Russia); based on arXiv:1906.10930 and arXiv:1912.10957
Tidal Evolution of Close-in Extra-Solar Planets
Creators: name: Jackson, Brian
name: Greenberg, Richard
name: Barnes, Rory
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The distribution of eccentricities e of extra-solar planets with semi-major axes a > 0.2 AU is very uniform, and values for e are generally large. For a < 0.2 AU, eccentricities are much smaller (most e < 0.2), a characteristic widely attributed to damping by tides after the planets formed and the protoplanetary gas disk dissipated. We have integrated the classical coupled tidal evolution equations for e and a backward in time over the estimated age of each planet, and confirmed that the distribution of initial e values of close-in planets matches that of the general population for reasonable tidal dissipation values Q, with the best fits for stellar and planetary Q being ~ 10^5.5 and ~ 10^6.5 respectively. The current small values of a were only reached gradually due to tides over the lifetimes of the planets, i.e., the earlier gas disk migration did not bring all planets to their current orbits. As the orbits tidally evolved, there was substantial tidal heating within the planets. The past tidal heating of each planet may have contributed significantly to the thermal budget that governed the planet's physical properties, including its radius, which in many cases may be measured by observing transit events. Here we also compute the plausible heating histories for a few planets with anomalously large measured radii, including HD 209458 b. We show that they may have undergone substantial tidal heating during the past billion years, perhaps enough to explain their large radii. Theoretical models of exoplanet interiors and the corresponding radii should include the role of large and time-variable tidal heating. Our results may have important implications for planet formation models, physical models of "hot Jupiters", and the success of transit surveys.
description: 9 pages, 3 figures. To appear in the proceedings of IAU Symposium 249: Exoplanets: Detection, Formation and Dynamics, held in Suzhou, China, Oct 22-26 2007. A version with full resolution figures is available at http://www.lpl.arizona.edu/~bjackson/publications/IAU249_proc.pdf
Investigating Guiding Information for Adaptive Collocation Point Sampling in PINNs
Creators: name: Florido, Jose
name: Wang, He
name: Khan, Amirul
name: Jimack, Peter K.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Physics-informed neural networks (PINNs) provide a means of obtaining approximate solutions of partial differential equations and systems through the minimisation of an objective function which includes the evaluation of a residual function at a set of collocation points within the domain. The quality of a PINNs solution depends upon numerous parameters, including the number and distribution of these collocation points. In this paper we consider a number of strategies for selecting these points and investigate their impact on the overall accuracy of the method. In particular, we suggest that no single approach is likely to be "optimal" but we show how a number of important metrics can have an impact in improving the quality of the results obtained when using a fixed number of residual evaluations. We illustrate these approaches through the use of two benchmark test problems: Burgers' equation and the Allen-Cahn equation.
description: 15 pages, 8 figures, 2 tables. Published in the conference proceedings of the International Conference on Computational Science (ICCS) 2024. Replacement to correct a typo regarding the value of viscosity listed in the captions
Dissonance and Resonance: Theory and Theatre in the Art of Donald Judd and Robert Morris
Creators: name: Diggins, Luke Andrew
Publisher: name: The Australian National University
Year: 2018
Subjects: minimalism, Donald Judd, Robert Morris, sculpture, postminimalism, Judson

description: This thesis interrogates the common grouping of Donald Judd and Robert Morris within minimalism to renegotiate difference between their intervening strategies into modernist art and criticism. When minimalism emerged as an avant-gardist threat and discursive challenge to modernist art during the mid-1960s, many contemporary critics missed the conceptual differences at play between Judd and Morris’ practices. Instead dismissive critics emphasised commonage within the rejection of modernist theory and formalism their art and writings signified. This thesis re-evaluates this art historical pairing of Judd and Morris within modern art by mapping out dissonances and resonances across their aesthetics. The primary contention of this thesis is that the conceptual dissimilarities between Judd and Morris’ minimalist practices extend from their formative artistic explorations. For Judd, this is painting and art criticism, while for Morris it is painting and dance. This thesis pursues a chronological examination of their respective paths towards minimalism and then comparatively analyses their minimalist practices from the early 1960s through to the end of that decade. The respective formal and philosophical problems Judd and Morris engaged with in their early transitory fields open to their conceptual dissonances between them at the site of the minimalism’s contest of the modernist canon
The 2+2-Signature and the 1+1-Matrix-Brane
Creators: name: Nieto, J. A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We discuss different aspects of the 2+2-signature from the point of view of the quatl theory. In particular, we compare two alternative approaches to such a spacetime signature, namely the 1+1-matrix-brane and the 2+2-target spacetime of a string. This analysis also reveals hidden discrete symmetries of the 2+2-brane action associated with the 2+2-dimensional sector of a 2+10-dimensional target background.
description: 12 pages, Latex, to appear in Mod. Phys. Lett. A
Performance Evaluation of GPS Trajectory Rasterization Methods
Creators: name: Gengec, Necip Enes
name: Tari, Ergin
Publisher: name: arXiv
Year: 2024
Subjects: subject: Signal Processing (eess.SP)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: The availability of the Global Positioning System (GPS) trajectory data is increasing along with the availability of different GPS receivers and with the increasing use of various mobility services. GPS trajectory is an important data source which is used in traffic density detection, transport mode detection, mapping data inferences with the use of different methods such as image processing and machine learning methods. While the data size increases, efficient representation of this type of data is becoming difficult to be used in these methods. A common approach is the representation of GPS trajectory information such as average speed, bearing, etc. in raster image form and applying analysis methods. In this study, we evaluate GPS trajectory data rasterization using the spatial join functions of QGIS, PostGIS+QGIS, and our iterative spatial structured grid aggregation implementation coded in the Python programming language. Our implementation is also parallelizable, and this parallelization is also included as the fourth method. According to the results of experiment carried out with an example GPS trajectory dataset, QGIS method and PostGIS+QGIS method showed relatively low performance with respect to our method using the metric of total processing time. PostGIS+QGIS method achieved the best results for spatial join though its total performance decreased quickly while test area size increases. On the other hand, both of our methods' performances decrease directly proportional to GPS point. And our methods' performance can be increased proportional to the increase with the number of processor cores and/or with multiple computing clusters.
A Perspective on Deep Vision Performance with Standard Image and Video Codecs
Creators: name: Reich, Christoph
name: Hahn, Oliver
name: Cremers, Daniel
name: Roth, Stefan
name: Debnath, Biplob
Publisher: name: arXiv
Year: 2024
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Multimedia (cs.MM)
subject: FOS: Computer and information sciences

description: Resource-constrained hardware, such as edge devices or cell phones, often rely on cloud servers to provide the required computational resources for inference in deep vision models. However, transferring image and video data from an edge or mobile device to a cloud server requires coding to deal with network constraints. The use of standardized codecs, such as JPEG or H.264, is prevalent and required to ensure interoperability. This paper aims to examine the implications of employing standardized codecs within deep vision pipelines. We find that using JPEG and H.264 coding significantly deteriorates the accuracy across a broad range of vision tasks and models. For instance, strong compression rates reduce semantic segmentation accuracy by more than 80% in mIoU. In contrast to previous findings, our analysis extends beyond image and action classification to localization and dense prediction tasks, thus providing a more comprehensive perspective.
description: Accepted at CVPR 2024 Workshop on AI for Streaming (AIS)
Consecutive gold[I]-catalysed cyclisation reactions leading to polyfused heterocycles of agrochemical relevance
Creators: name: Sharp, Phillip Patrick
Publisher: name: The Australian National University
Year: 2018
Subjects: subject: QD421.S53 2011
subject: Alkaloids Synthesis
subject: Organic compounds Synthesis
subject: Sponges Antarctic Ocean
subject: Marine natural products

description: Variolin B, a marine natural product isolated from the Antarctic sponge Kirkpatrickia variolosa, possesses a rare heterocyclic framework and is a potent CDK inhibitor. Such properties have prompted the industry partner associated with this project, namely the German chemical commodities company BASF, to select this compound as a lead for the development of new agrochemicals. This thesis details the development of new synthetic methods specifically designed to produce complex heterocyclic frameworks related to variolin B. The synthetic plan, which involved consecutive electrophile-promoted nucleophilic ring-closure reactions of 1-[2-(buta-1,3-diynyl)pyridyl]ureas potentially leading to pyrido[3',2':4,5]pyrrolo[1,2-c]pyrimidin-9(8H)-ones, is outlined in Chapter One. The first part of Chapter Two describes the synthesis of alkynylphenylureas as model cascade cyclisation precursors and the second part details the outcomes of reactions of these model compounds with various sources of iodine. The reactions delivered mono-cyclised compounds in some cases although intermolecular side-reactions prevented cascading cyclisation reactions from occurring. Details of the successful development of consecutive gold-catalysed nucleophilic ring-closure reaction of 2-(buta-1,3-diynyl)phenylureas that deliver pyrimido[1,6-a]indol-1(2H)-ones are provided in Chapter Three. The effect that substituents have on the outcome of these gold-promoted reactions were also assessed and it was found that N,N'-disubstituted cyclisation precursors give 1-methylene-1H-imidazo[1,5-a]indol-3(2H)-ones as the major products. Chapter Four outlines the preparation of pyridine-based cyclisation precursors and attempts to synthesise variolin B by applying the gold-catalysed cyclisation methodology to them. These reactions led to mono-cyclised products in some cases but side reactions were also observed. Many of the heterocycles produced during the course of this work are unprecedented and, accordingly, they are being tested for their agrochemical properties by BASF Crop-Protection Division. This aspect of the work is discussed in Appendix 1.
Entanglement transfer, accumulation and retrieval via quantum-walk-based qubit-qudit dynamics
Creators: name: Giordani, Taira
name: Innocenti, Luca
name: Suprano, Alessia
name: Polino, Emanuele
name: Paternostro, Mauro
name: Spagnolo, Nicolò
name: Sciarrino, Fabio
name: Ferraro, Alessandro
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The generation and control of quantum correlations in high-dimensional systems is a major challenge in the present landscape of quantum technologies. Achieving such non-classical high-dimensional resources will potentially unlock enhanced capabilities for quantum cryptography, communication and computation. We propose a protocol that is able to attain entangled states of $d$-dimensional systems through a quantum-walk-based {\it transfer \& accumulate} mechanism involving coin and walker degrees of freedom. The choice of investigating quantum walks is motivated by their generality and versatility, complemented by their successful implementation in several physical systems. Hence, given the cross-cutting role of quantum walks across quantum information, our protocol potentially represents a versatile general tool to control high-dimensional entanglement generation in various experimental platforms. In particular, we illustrate a possible photonic implementation where the information is encoded in the orbital angular momentum and polarization degrees of freedom of single photons.
description: 11 pages, 6 figures
The core radius of a star cluster containing a massive black hole
Creators: name: Heggie, Douglas C.
name: Hut, Piet
name: Mineshige, Shin
name: Makino, Jun
name: Baumgardt, Holger
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: (Simplified) We present a theoretical framework which establishes how the core radius of a star cluster varies with the mass of an assumed central black hole. Our result is that the ratio of core to half-mass radius varies as the 3/4 power of the ratio of the black hole to cluster mass, when the system is well relaxed. The theory compares favourably with a number of simulations of this problem, which extend to black hole masses of order 10% of the cluster mass. Though strictly limited as yet to clusters with stars of equal mass, our conclusion strengthens the view that clusters with large core radii are the most promising candidates in which to find a massive black hole.
description: 4 pages, 2 figures, to appear in PASJ Letters, PASJ Vol. 59, No. 3. (to be issued on June 25, 2007). Minor revisions
An exact, generalised Laplace resonance in the HR 8799 planetary system
Creators: name: Gozdziewski, Krzysztof
name: Migaszewski, Cezary
Publisher: name: arXiv
Year: 2020
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: A system of four super-Jupiter planets around HR 8799 is the first multi-planet configuration discovered via the direct imaging technique. Despite over decade of research, the system's architecture remains not fully resolved. The main difficulty comes from still narrow observing window of ~20 years that covers small arcs of orbits with periods from roughly 50 to 500 years. Soon after the discovery it became clear that unconstrained best-fitting astrometric configurations self-disrupt rapidly, due to strong mutual gravitational interactions between ~10-Jupiter-mass companions. Recently, we showed that the HR 8799 system may be long term stable when locked in a generalized Laplace 8:4:2:1 mean motion resonance (MMR) chain, and we constrained its orbits through the planetary migration. Here we qualitatively improve this approach by considering the MMR in terms of an exactly periodic configuration. This assumption enables us to construct for the first time the self-consistent $N$-body model of the long-term stable orbital architecture, using only available astrometric positions of the planets relative to the star. We independently determine planetary masses, which are consistent with thermodynamic evolution, and the parallax overlapping to $1σ$ with the most recent GAIA DR2 value. We also determine the global structure of the inner and outer debris discs in the [8, 600] au range, consistent with the updated orbital solution.
description: 24 pages, 19 figures, 1 Table, the main paper with Appendix, accepted in Astrophysical Journal Letters
Effective light-induced Hamiltonian for atoms with large nuclear spin
Creators: name: Burba, Domantas
name: Dunikowski, Hubert
name: Robert-de-Saint-Vincent, Martin
name: Witkowska, Emilia
name: Juzeliūnas, Gediminas
Publisher: name: arXiv
Year: 2024
Subjects: subject: Quantum Physics (quant-ph)
subject: Quantum Gases (cond-mat.quant-gas)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: Ultra-cold fermionic atoms, having two valence electrons, exhibit a distinctive internal state structure, wherein the nuclear spin becomes decoupled from the electronic degrees of freedom in the ground electronic state. Consequently, the nuclear spin states are well isolated from the environment, rendering these atomic systems an opportune platform for quantum computation and quantum simulations. Coupling with off-resonance light is an essential tool to selectively and coherently manipulate the nuclear spin states. In this paper, we present a systematic derivation of the effective Hamiltonian for the nuclear spin states of ultra-cold fermionic atoms due to such an off-resonance light. We obtain compact expressions for the scalar, vector and tensor light shifts taking into account both linear and quadratic contributions to the hyperfine splitting. The analysis has been carried out using the Green operator approach and solving the corresponding Dyson equation. Finally, we analyze different scenarios of light configurations which lead to the vector- and tensor-light shifts, as well as the pure spin-orbit coupling for the nuclear spin.
description: 13 pages, 4 figures
Effects of vanadium compounds on diabetes induced changes in STZ-diabetic rats
Creators: name: Yao, Jun
Publisher: name: University of British Columbia
Year: 2009

description: Controversial reports on the efficacy and possible toxicity of vanadium obtained from various studies may be attributed to differences in the method of diabetes induction and/or to differences in animal strains. The objective of this study was to evaluate the contribution of these two factors to the effects of vanadium in the treatment of diabetes. Two methods of streptozotocin (STZ) induced diabetes in rats have been used for studying the antidiabetic effects of vanadium. One involves a single intravenous (i.v.) injection of 60 mg/kg STZ, and the other uses two subcutaneous (s.c.) injections of 40 mg/kg STZ, to either Wistar or Sprague Dawley (SD) rats. In a 7-week chronic study, SD rats appeared to develop a more severe diabetes (indicated by higher plasma cholesterol and higher fasting plasma glucose levels) following the single i.v. injection of STZ than rats made diabetic by two s.c. injections of STZ. Irrespective of the method of diabetes induction or the strain of rat, the responses of all the diabetic animals to vanadyl sulphate treatment were similar. In a 1-week acute study, Wistar diabetic rats were more responsive than SD diabetic rats to vanadyl sulphate and to lower doses (0.6 and 0.8 mmol/kg) of a new organic compound, bis(maltolato)oxovanadium(IV).
Local density of states of 1D Mott insulators and CDW states with a boundary
Creators: name: Schuricht, Dirk
name: Essler, Fabian H. L.
name: Jaefari, Akbar
name: Fradkin, Eduardo
Publisher: name: arXiv
Year: 2008
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We determine the local density of states (LDOS) of one-dimensional incommensurate charge density wave (CDW) states in the presence of a strong impurity potential, which is modeled by a boundary. We find that the CDW gets pinned at the impurity, which results in a singularity in the Fourier transform of the LDOS at momentum 2k_F. At energies above the spin gap we observe dispersing features associated with the spin and charge degrees of freedom respectively. In the presence of an impurity magnetic field we observe the formation of a bound state localized at the impurity. All of our results carry over to the case of one dimensional Mott insulators by exchanging the roles of spin and charge degrees of freedom. We discuss the implications of our result for scanning tunneling microscopy experiments on spin-gap systems such as two-leg ladder cuprates and 1D Mott insulators.
Single wavelength operating neuromorphic device based on a graphene-ferroelectric transistor
Creators: name: Maity, K.
name: Dayen, J. -F.
name: Doudin, B.
name: Gumeniuk, R.
name: Kundys, B.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Applied Physics (physics.app-ph)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: As global data generation continues to rise, there is an increasing demand for revolutionary in-memory computing methodologies and efficient machine learning solutions. Despite recent progress in electrical and electro-optical simulations of machine learning devices, the all-optical nonthermal function remains challenging, with single wavelength operation still elusive. Here we report on an optical and monochromatic way of neuromorphic signal processing for brain-inspired functions, eliminating the need for electrical pulses. Multilevel synaptic potentiation-depression cycles are successfully achieved optically by leveraging photovoltaic charge generation and polarization within the photoferroelectric substrate interfaced with the graphene sensor. Furthermore, the demonstrated low-power prototype device is able to reproduce exact signal profile of brain tissues yet with more than two orders of magnitude faster response. The reported properties should trigger all-optical and low power artificial neuromorphic development based on photoferroelectric structures.
description: 9 pages, 6 figures, research article
Low-energy excitations in the magnetized state of the bond-alternating quantum S=1 chain system NTENP
Creators: name: Regnault, L. -P.
name: Zheludev, A.
name: Hagiwara, M.
name: Stunault, A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: High intensity inelastic neutron scattering experiments on the S=1 quasi-one-dimensional bond-alternating antiferromagnet Ni(C9D24N4)(NO2)ClO4 (NTENP) are performed in magnetic fields of up to 14.8~T. Excitation in the high field magnetized quantum spin solid (ordered) phase are investigated. In addition to the previously observed coherent long-lived gap excitation [M. Hagiwara et al., Phys. Rev. Lett 94, 177202 (2005)], a broad continuum is detected at lower energies. This observation is consistent with recent numerical studies, and helps explain the suppression of the lowest-energy gap mode in the magnetized state of NTENP. Yet another new feature of the excitation spectrum is found at slightly higher energies, and appears to be some kind of multi-magnon state.
description: 5 pages, 4 fugures
Prospects for detecting the couplings of axion-like particle with neutrinos at the CEPC
Creators: name: Yue, Chong-Xing
name: Li, Xin-Yang
name: Sun, Xiao-Chen
Publisher: name: arXiv
Year: 2024
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We explore the possibility of detecting the couplings of axion-like particle (ALP) with leptons from their loop-level impact on the ALP couplings to electroweak (EW) gauge bosons via the signal process $e^+ e^- \to γγ{E\mkern-10.5 mu/}$ at the Circular Electron Positron Collider (CEPC) and obtain prospective sensitivities to the ALP-lepton couplings. Our numerical results show that the CEPC with the center of mass energy $\sqrt{s}=240~(91)$ GeV and the integrated luminosity $\mathcal{L}=5.6~(16)$ ab$^{-1}$ might be sensitive for probing the ALP-lepton couplings in the ALP mass range from $10$ GeV to $130~(50)$ GeV, where the prospective sensitivities to the ALP-neutrino coupling $Tr(g_{aνν})/f_a$ can be as low as $0.016~(0.012)$ GeV$^{-1}$ and $0.0031~(2.8 \times 10^{-4})$ GeV$^{-1}$ for $c_{R}=0$ and $c_{R}=c_{L}$, and to the ALP-charged lepton coupling $Tr(g_{a\ell\ell})/f_a$ can be as low as $0.035~(0.07)$ GeV$^{-1}$ for $c_{L}=0$. We find that the prospective sensitivities given by the CEPC are not covered by the current and expected exclusion regions in some ALP mass intervals. The CEPC has the potential for exploring the ALP-neutrino couplings via some promising processes induced by the ALP-EW gauge boson couplings in the future.
description: 19 pages,15 figures,7 tables
Algebraic Complete Integrability of the $a_4^{(2)}$ Toda Lattice
Creators: name: Ndi, Bruce Lionnel Lietap
name: Dehainsala, Djagwa
name: Dongho, Joseph
Publisher: name: arXiv
Year: 2024
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: Algebraic Geometry (math.AG)
subject: Symplectic Geometry (math.SG)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 34G20, 34M55, 37J35

description: The aim of this work is focused on the investigation of the algebraic complete integrability of the Toda lattice associated with the twisted affine Lie algebra $a_4^{(2)}$. First, we prove that the generic fiber of the momentum map for this system is an affine part of an abelian surface. Second, we show that the flows of integrable vector fields on this surface are linear. Finally, using the formal Laurent solutions of the system, we provide a detailed geometric description of these abelian surfaces and the divisor at infinity.
CoFInAl: Enhancing Action Quality Assessment with Coarse-to-Fine Instruction Alignment
Creators: name: Zhou, Kanglei
name: Li, Junlin
name: Cai, Ruizhi
name: Wang, Liyuan
name: Zhang, Xingxing
name: Liang, Xiaohui
Publisher: name: arXiv
Year: 2024
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Action Quality Assessment (AQA) is pivotal for quantifying actions across domains like sports and medical care. Existing methods often rely on pre-trained backbones from large-scale action recognition datasets to boost performance on smaller AQA datasets. However, this common strategy yields suboptimal results due to the inherent struggle of these backbones to capture the subtle cues essential for AQA. Moreover, fine-tuning on smaller datasets risks overfitting. To address these issues, we propose Coarse-to-Fine Instruction Alignment (CoFInAl). Inspired by recent advances in large language model tuning, CoFInAl aligns AQA with broader pre-trained tasks by reformulating it as a coarse-to-fine classification task. Initially, it learns grade prototypes for coarse assessment and then utilizes fixed sub-grade prototypes for fine-grained assessment. This hierarchical approach mirrors the judging process, enhancing interpretability within the AQA framework. Experimental results on two long-term AQA datasets demonstrate CoFInAl achieves state-of-the-art performance with significant correlation gains of 5.49% and 3.55% on Rhythmic Gymnastics and Fis-V, respectively. Our code is available at https://github.com/ZhouKanglei/CoFInAl_AQA.
description: Accepted by IJCAI 2024
Covariant homogeneous nets of standard subspaces
Creators: name: Morinelli, Vincenzo
name: Neeb, Karl-Hermann
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mathematical Physics (math-ph)
subject: Operator Algebras (math.OA)
subject: Representation Theory (math.RT)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: Rindler wedges are fundamental localization regions in AQFT. They are determined by the one-parameter group of boost symmetries fixing the wedge. The algebraic canonical construction of the free field provided by Brunetti-Guido-Longo (BGL) arises from the wedge-boost identification, the BW property and the PCT Theorem. In this paper we generalize this picture in the following way. Firstly, given a $\mathbb Z_2$-graded Lie group we define a (twisted-)local poset of abstract wedge regions. We classify (semisimple) Lie algebras supporting abstract wedges and study special wedge configurations. This allows us to exhibit an analog of the Haag-Kastler one-particle net axioms for such general Lie groups without referring to any specific spacetime. This set of axioms supports a first quantization net obtained by generalizing the BGL construction. The construction is possible for a large family of Lie groups and provides several new models. We further comment on orthogonal wedges and extension of symmetries.
description: 49 pages
Quantum phases of correlated electrons in artificial molecules under magnetic fields
Creators: name: Bellucci, Devis
name: Rontani, Massimo
name: Goldoni, Guido
name: Molinari, Elisa
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We investigate the stability of few-electron quantum phases in vertically coupled quantum dots under a magnetic field of arbitrary strength and direction. The orbital and spin stability diagrams of realistic devices containing up to five electrons, from strong to weak inter-dot coupling, is determined. Correlation effects and realistic sample geometries are fully taken into account within the Full Configuration Interaction method. In general, the magnetic field drives the system into a strongly correlated regime by modulating the single-particle gaps. In coupled quantum dots different components of the field, either parallel or perpendicular to the tunneling direction, affect single-dot orbitals and tunneling energy, respectively. Therefore, the stability of the quantum phases is related to different correlation mechanisms, depending on the field direction. Comparison of exact diagonalization results with simple models allows to identify the specific role of correlations.
description: RevTeX 4.0, 13 pages, 13 b/w eps figures, 1 colour eps figure, to appear in Physical Review B
Inertia and Activity: Spiral transitions in semi-flexible, self-avoiding polymers
Creators: name: Karan, Chitrak
name: Chaudhuri, Abhishek
name: Chaudhuri, Debasish
Publisher: name: arXiv
Year: 2024
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Physical sciences

description: We consider a two-dimensional, tangentially active, semi-flexible, self-avoiding polymer to find a dynamical re-entrant transition between motile open chains and spinning achiral spirals with increasing activity. Utilizing probability distributions of the turning number, we ascertain the comparative stability of the spiral structure and present a detailed phase diagram within the activity inertia plane. The onset of spiral formation at low activity levels is governed by a torque balance and is independent of inertia. At higher activities, however, inertial effects lead to spiral destabilization, an effect absent in the overdamped limit. We further delineate alterations in size and shape by analyzing the end-to-end distance distribution and the radius of gyration tensor. The Kullback-Leibler divergence from equilibrium distributions exhibits a non-monotonic relationship with activity, reaching a peak at the most compact spirals characterized by the most persistent spinning. As inertia increases, this divergence from equilibrium diminishes.
description: 11 pages, 9 figures
Predicting challenge moments from students' discourse: A comparison of GPT-4 to two traditional natural language processing approaches
Creators: name: Suraworachet, Wannapon
name: Seon, Jennifer
name: Cukurova, Mutlu
Publisher: name: arXiv
Year: 2024
Subjects: subject: Computation and Language (cs.CL)
subject: Computers and Society (cs.CY)
subject: FOS: Computer and information sciences

description: Effective collaboration requires groups to strategically regulate themselves to overcome challenges. Research has shown that groups may fail to regulate due to differences in members' perceptions of challenges which may benefit from external support. In this study, we investigated the potential of leveraging three distinct natural language processing models: an expert knowledge rule-based model, a supervised machine learning (ML) model and a Large Language model (LLM), in challenge detection and challenge dimension identification (cognitive, metacognitive, emotional and technical/other challenges) from student discourse, was investigated. The results show that the supervised ML and the LLM approaches performed considerably well in both tasks, in contrast to the rule-based approach, whose efficacy heavily relies on the engineered features by experts. The paper provides an extensive discussion of the three approaches' performance for automated detection and support of students' challenge moments in collaborative learning activities. It argues that, although LLMs provide many advantages, they are unlikely to be the panacea to issues of the detection and feedback provision of socially shared regulation of learning due to their lack of reliability, as well as issues of validity evaluation, privacy and confabulation. We conclude the paper with a discussion on additional considerations, including model transparency to explore feasible and meaningful analytical feedback for students and educators using LLMs.
description: 13 pages, 1 figure
Quadrinhos em língua mỹky
Creators: name: Mỹky, Kamtinuwy
name: Mỹky, Tapau
name: Mỹky, Tupy
name: Bardagil Mas, Bernat
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2023
Subjects: subject: irn

description: Quadrinhos traduzidos ou criados pelos alunos e professores da escola Xinũi Mỹky da aldeia Iruu/ Japuira em 2022.
Comics translated or made by the students and teachers of the Xinũi Mỹky school at the village of Iruu/ Japuira in 2022.
EGRET Excess of diffuse Galactic Gamma Rays interpreted as a Signal of Dark Matter Annihilation
Creators: name: de Boer, W.
name: Sander, C.
name: Zhukov, V.
name: Gladyshev, A. V.
name: Kazakov, D. I.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Elsaesser and Mannheim fit a contribution of Dark Matter Annihilation (DMA) to the extragalactic contribution of the galactic diffuse gamma ray flux, as deduced from the EGRET data by Strong, Moskalenko and Reimer.They find a WIMP mass of 515{+110}{-75} GeV and quote a systematic error of 30\%. However, they do not include large systematic uncertainties from the fact that the determination of the extragalactic flux (EGF) requires a model for the subtraction of the Galactic flux from the data.The data used were obtained with a model without Galactic DM, so one expects additional uncertainty in the region where DMA contributes. Including a Galactic DMA contribution reduces the significance and the WIMP mass. The latter then becomes compatible with the Galactic excess of diffuse gamma rays, which posseses all the properties of DMA with a much higher significance than the extragalactic excess.
description: 1 page, 1 figure, comment on paper by Elsaesser and Mannheim, titled Supersymmetric Dark Matter and the Extragalactic Gamma Ray Background
Investigating differences in lab-quality and remote recording methods with dynamic acoustic measures
Creators: name: Zhang, Cong
name: Jepson, Kathleen
name: Chuang, Yu-Ying
Publisher: name: arXiv
Year: 2024
Subjects: subject: Sound (cs.SD)
subject: Audio and Speech Processing (eess.AS)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Increasingly, phonetic research utilizes data collected from participants who record themselves on readily available devices. Though such recordings are convenient, their suitability for acoustic analysis remains an open question, especially regarding how the individual methods affect acoustic measures over time. We used Quantile Generalized Additive Mixed Models (QGAMMs) to analyze measures of F0, intensity, and the first and second formants, comparing files recorded using a laboratory-standard recording method (Zoom H6 Recorder with an external microphone), to three remote recording methods, (1) the Awesome Voice Recorder application on a smartphone (AVR), (2) the Zoom meeting application with default settings (Zoom-default), and (3) the Zoom meeting application with the "Turn on Original Sound" setting (Zoom-raw). A linear temporal alignment issue was observed for the Zoom methods over the course of the long, recording session files. However, the difference was not significant for utterance-length files. F0 was reliably measured using all methods. Intensity and formants presented non-linear differences across methods that could not be corrected for simply. Overall, the AVR files were most similar to the H6's, and so AVR is deemed to be a more reliable recording method than either Zoom-default or Zoom-raw.
Event Selection and Background Rejection in Time Projection Chambers Using Convolutional Neural Networks and a Specific Application to the AdEPT Gamma-ray Polarimeter Mission
Creators: name: Garnett, Richard L.
name: Byun, Soo Hyun
name: Hanu, Andrei R.
name: Hunter, Stanley D.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: High Energy Physics - Experiment (hep-ex)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: The Advanced Energetic Pair Telescope gamma-ray polarimeter uses a time projection chamber for measuring pair production events and is expected to generate a raw instrument data rate four orders of magnitude greater than is transmittable with typical satellite data communications. GammaNet, a convolutional neural network, proposes to solve this problem by performing event classification on-board for pair production and background events, reducing the data rate to a level that can be accommodated by typical satellite communication systems. In order to train GammaNet, a set of 1.1x10^6 pair production events and 10^6 background events were simulated for the Advanced Energetic Pair Telescope using the Geant4 Monte Carlo code. An additional set of 10^3 pair production and 10^5 background events were simulated to test GammaNet's capability for background discrimination. With optimization, GammaNet has achieved the proposed background rejection requirements for Galactic Cosmic Ray proton events. Given the best case assumption for downlink speeds, signal sensitivity for pair production ranged between 1.1 +/- 0.5% to 69 +/- 2% for 5 and 250 MeV incident gamma rays. This range became 0.1 +/- 0.1% to 17 +/- 2% for the worst case scenario of downlink speeds. The application of a feature visualization algorithm to GammaNet demonstrated decreased response to electronic noise and events exiting or entering the frame and increased response to parallel tracks that are close in proximity. GammaNet has been successfully implemented and shows promising results.
description: Citation: Richard L. Garnett, Soo Hyun Byun, Andrei R. Hanu, Stanley D. Hunter, Event selection and background rejection in time projection chambers using convolutional neural networks and a specific application to the AdEPT gamma-ray polarimeter mission, NIM A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2020, 164860, ISSN 0168-9002, 10.1016/j.nima.2020.164860
The "Act for the Extermination of Wild Horses" from Richard Wolfenden, the Printer of the Queen's Most Excellent Majesty, 1897
Creators: name: Wolfenden, Richard
Publisher: name: The University of British Columbia
Year: 2017

description: The "Act for the Extermination of Wild Horses" as printed by Richard Wolfenden, the printer for the Queen's most excellent majesty, dated 1897.
The cult of happiness: paper gods, popular culture, and revolution in rural North China
Creators: name: Flath, James Alexander
Publisher: name: University of British Columbia
Year: 2009

description: Since the late Ming Dynasty the Shandong village of Yangjiabu has been a major production centre for the highly expressive and symbolically rich works of art known as TSfew Year's wood-block prints', or nianhua. Being mass produced by the millions of copies annually and distributed throughout North-China on the occasion of the Lunar New Year Festival these icons serve as an excellent chronicle of the cosmology and popular culture of the Chinese peasant. In the twentieth century, the Chinese Communist Party recognized nianhua as a potential propaganda tool and undertook reforms of the genre toward achieving cultural revolution in the countryside. As a result we have been left with both a pictorial and a textual chronicle of the attempts to reform the classical and ritualistic perceptions of the Chinese peasant in the 1940s and 1950s. Nianhua therefore serve as a unique narrative and historical representation of a people who left few other indications of their ideals and reactions to change, and of the modernizing state which sought to direct them.
Non-anomalous `Ward' identities to supplement large-N multi-matrix loop equations for correlations
Creators: name: Akant, Levent
name: Krishnaswami, Govind S.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: This work concerns single-trace correlations of Euclidean multi-matrix models. In the large-N limit we show that Schwinger-Dyson equations imply loop equations and non-anomalous Ward identities. Loop equations are associated to generic infinitesimal changes of matrix variables (vector fields). Ward identities correspond to vector fields preserving measure and action. The former are analogous to Makeenko-Migdal equations and the latter to Slavnov-Taylor identities. Loop equations correspond to leading large-N Schwinger-Dyson equations. Ward identities correspond to 1/N^2 suppressed Schwinger-Dyson equations. But they become leading equations since loop equations for non-anomalous vector fields are vacuous. We show that symmetries at infinite N persist at finite N, preventing mixing with multi-trace correlations. For one matrix, there are no non-anomalous infinitesimal symmetries. For two or more matrices, measure preserving vector fields form an infinite dimensional graded Lie algebra, and non-anomalous action preserving ones a subalgebra. For Gaussian, Chern-Simons and Yang-Mills models we identify up to cubic non-anomalous vector fields, though they can be arbitrarily non-linear. Ward identities are homogeneous linear equations. We use them with the loop equations to determine some correlations of these models. Ward identities alleviate the underdeterminacy of loop equations. Non-anomalous symmetries give a naturalness-type explanation for why several linear combinations of correlations in these models vanish.
description: 35 pages, reference added, minor typos corrected, published version