cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
First Lunar Occultation Results from the 2.4 m Thai National Telescope equipped with ULTRASPEC
Creators: name: Richichi, A.
name: Irawati, P.
name: Soonthornthum, B.
name: Dhillon, V. S.
name: Marsh, T. R.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The recently inaugurated 2.4\,m Thai National Telescope (TNT) is equipped, among other instruments, with the ULTRASPEC low-noise, frame-transfer EMCCD camera. At the end of its first official observing season, we report on the use of this facility to record high time resolution imaging using small detector subarrays with sampling as fast as several $10^2$\,Hz. In particular, we have recorded lunar occultations of several stars which represent the first contribution to this area of research made from South-East Asia with a telescope of this class. Among the results, we discuss an accurate measurement of $α$~Cnc, which has been reported previously as a suspected close binary. Attempts to resolve this star by several authors have so far met with a lack of unambiguous confirmation. With our observation we are able to place stringent limits on the projected angular separation ($<0\farcs003$) and brightness ($Δ{\rm m} > 5$) of a putative companion. We also present a measurement of the binary {HR~7072}, which extends considerably the time coverage available for its yet undetermined orbit. We discuss our precise determination of the flux ratio and projected separation in the context of other available data. We conclude by providing an estimate of the performance of ULTRASPEC at TNT for lunar occultation work. This facility can help to extend the lunar occultation technique in a geographical area where no comparable resources were available until now.
description: Accepted for publication in Astronomical Journal
Search for pair-produced vector-like leptons in final states with third-generation leptons and at least three b quark jets in proton-proton collisions at $\sqrt{s}$ = 13 TeV
Creators: name: CMS Collaboration
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The first search is presented for vector-like leptons (VLLs) in the context of the "4321 model", an ultraviolet-complete model with the potential to explain existing B physics measurements that are in tension with standard model predictions. The analyzed data, corresponding to an integrated luminosity of 96.5 fb$^{-1}$, were recorded in 2017 and 2018 with the CMS detector at the LHC in proton-proton collisions at $\sqrt{s}$ = 13 TeV. Final states with ${\geq}$ 3 b-tagged jets and two third-generation leptons ($ττ$, $τν_τ$, or $ν_τν_τ$) are considered. Upper limits are derived on the VLL production cross section in the VLL mass range 500-1050 GeV. The maximum likelihood fit prefers the presence of signal at the level of 2.8 standard deviations, for a representative VLL mass point of 600 GeV. As a consequence, the observed upper limits are approximately double the expected limits.
description: Replaced with the published version. Added the journal reference. All the figures and tables can be found at http://cms-results.web.cern.ch/cms-results/public-results/publications/B2G-21-004 (CMS Public Pages)
Mass-driven vortex collisions in flat superfluids
Creators: name: Richaud, Andrea
name: Lamporesi, Giacomo
name: Capone, Massimo
name: Recati, Alessio
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: Quantum vortices are often endowed with an effective inertial mass, due, for example, to massive particles in their cores. Such "massive vortices" display new phenomena beyond the standard picture of superfluid vortex dynamics, where the mass is neglected. In this work, we demonstrate that massive vortices are allowed to collide, as opposed to their massless counterparts. We propose a scheme to generate controllable, repeatable, deterministic collisional events in pairs of quantum vortices. We demonstrate two mass-driven fundamental processes: (i) the annihilation of two counter-rotating vortices and (ii) the merging of two co-rotating vortices, thus pointing out new mechanisms supporting incompressible-to-compressible kinetic energy conversion, as well as doubly-quantized vortices stabilization in flat superfluids.
description: 6 pages, 4 figures (+ 2 pages for Supplemental Material)
Neutral magic-angle bilayer graphene: Condon instability and chiral resonances
Creators: name: Stauber, T.
name: Wackerl, M.
name: Wenk, P.
name: Margetis, D.
name: González, J.
name: Gómez-Santos, G.
name: Schliemann, J.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We discuss the full optical response of twisted bilayer graphene at the neutrality point close to the magic angle within the continuum model (CM). Firstly, we identify three different channels consistent with the underlying $D_3$ symmetry, yielding the total, magnetic, and chiral response. Secondly, we numerically calculate the full optical response in the immediate vicinity of the magic angle $θ_m$ which provides a direct mapping of the CM onto an effective two-band model. We, further, show that the ground-state of the CM in the immediate vicinity of $θ_m$ is unstable towards transverse current fluctuations, a so-called Condon instability. Thirdly, due to the large counterflow, the acoustic plasmonic excitations with typical wave numbers have larger energies than the optical ones and their energy density may be largely enhanced at certain frequencies which we denominate as {\it chiral resonances}. Finally, we discuss symmetry relations for the optical response and their consequences for the chiral response.
description: 19 pages, 7 figures
The effect of thermal aging on the strength and the thermoelectric power of the Ti-6Al-4V alloy
Creators: name: Carreon Hector
name: David, San Martin
name: Caballero Francisca, G.
name: Panin Victor, E.
Publisher: name: Физическая мезомеханика
Year: 2017
Subjects: TI-6AL-4V ALLOY
STRENGTHENING
THERMOELECTRIC MEASUREMENTS
HARDNESS
AGING
СПЛАВ TI-6AL-4V
УПРОЧНЕНИЕ
ТЕРМОЭЛЕКТРИЧЕСКИЕ ИЗМЕРЕНИЯ
ТВЕРДОСТЬ
СТАРЕНИЕ

description: When the Ti-6Al-4V alloy is overaged at 500-600 °C, nanometer-sized a2 (Ti3Al) particles can be homogeneously precipitated inside a phases, thereby leading to strength improvement. Widmanstдtten and equiaxed microstructures containing fine a2 (Ti3Al) particles were obtained by overaging the Ti-6Al-4V alloy. Precipitation of a2 (Ti3Al) particles was monitored using thermoelectric power measurements for different aging conditions in the Ti-6Al-4V alloy. Overaging heat treatments were conducted at 515, 545 and 575 °C for different aging times. In addition, overaging samples were examined by optical microscopy, scanning electron microscopy and hardness measurements. It was found that the thermoelectric power is very sensitive to the aging process in the two studied Ti-6Al-4V structures.
Electrostatic complementarity at the interface drives transient protein-protein interactions
Creators: name: Grassmann, Greta
name: Di Rienzo, Lorenzo
name: Gosti, Giorgio
name: Leonetti, Marco
name: Ruocco, Giancarlo
name: Miotto, Mattia
name: Milanetti, Edoardo
Publisher: name: arXiv
Year: 2022
Subjects: subject: Biomolecules (q-bio.BM)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: Understanding the molecular mechanisms driving the binding between bio-molecules is a crucial challenge in molecular biology. In this respect, characteristics like the preferentially hydrophobic composition of the binding interfaces, the role of van der Waals interactions (short range forces), and the consequent shape complementarity between the interacting molecular surfaces are well established. However, no consensus has yet been reached on how and how much electrostatic participates in the various stages of protein-protein interactions. Here, we perform extensive analyses on a large dataset of protein complexes for which both experimental binding affinity and pH data were available. We found that (i) although different classes of dimers do not present marked differences in the amino acid composition and charges disposition in the binding region, (ii) homodimers with identical binding region show higher electrostatic compatibility with respect to both homodimers with non-identical binding region and heterodimers. The level of electrostatic compatibility also varies with the pH of the complex, reaching the lowest values for low pH. Interestingly, (iii) shape and electrostatic complementarity behave oppositely when one stratifies the complexes by their binding affinity. Conversely, complexes with low values of binding affinity exploit Coulombic complementarity to acquire specificity, suggesting that electrostatic complementarity may play a greater role in transient (or less stable) complexes. In light of these results, (iv) we provide a fast and efficient method to measure electrostatic complementarity without the need of knowing the complex structure. Expanding the electrostatic potential on a basis of 2D orthogonal polynomials, we can discriminate between transient and permanent protein complexes with an AUC of the ROC of 0.8.
description: 16 pages, 5 figures, 3 tables
Optimising Physiotherapy Assessment of Trauma Patients in the Acute Hospital Setting
Creators: name: Calthorpe, Sara
Publisher: name: La Trobe
Year: 2020
Subjects: subject: 110317 Physiotherapy
subject: FOS: Clinical medicine

description: Submitted in total fulfilment of the requirements of the Degree of Master of Applied Science to the Department of Rehabilitation, Nutrition and Sport, School of Allied Health, Human Services and Sport, College of Science, Health and Engineering, La Trobe University, Victoria, Australia.
A Volume-based Description of Transport in Incompressible Liquid Electrolytes and its Application to Ionic Liquids
Creators: name: Kilchert, Franziska
name: Lorenz, Martin
name: Schammer, Max
name: Nürnberg, Pinchas
name: Schönhoff, Monika
name: Latz, Arnulf
name: Horstmann, Birger
Publisher: name: arXiv
Year: 2022
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: Transference numbers play an important role for understanding the dynamics of electrolytes and assessing their performance in batteries. Unfortunately, these transport parameters are difficult to measure in highly concentrated, liquid electrolytes such as ionic liquids. Also, the interpretation of their sign and magnitude has provoked an ongoing debate in the literature further complicated by the use of different language. In this work, we highlight the role of the reference frame for the interpretation of transport parameters using our novel thermodynamically consistent theory for highly correlated electrolytes. We argue that local volume conservation is a key principle in incompressible liquid electrolytes and use the volume-based drift velocity as reference. We apply our general framework to electrophoretic NMR experiments. For ionic liquid based electrolytes, we find that the results of the eNMR measurements can be best described using this volume-based description. This highlights the limitations of the widely used center-of-mass reference frame which for example forms the basis for molecular dynamics simulations - a standard tool for the theoretical calculation of transport parameters. It shows that the assumption of local momentum conservation is incorrect in those systems on the macroscopic scale.
The voter model chordal interface in two dimensions
Creators: name: Holmes, Mark
name: Mohylevskyy, Yevhen
name: Newman, Charles M.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics

description: Consider the voter model on a box of side length $L$ (in the triangular lattice) with boundary votes fixed forever as type 0 or type 1 on two different halves of the boundary. Motivated by analogous questions in percolation, we study several geometric objects at stationarity, as $L\rightarrow \infty$. One is the interface between the (large -- i.e., boundary connected) 0-cluster and 1-cluster. Another is the set of large "coalescing classes" determined by the coalescing walk process dual to the voter model.
description: 16 pages, 6 figures
Shifting Perspective to See Difference: A Novel Multi-View Method for Skeleton based Action Recognition
Creators: name: Hou, Ruijie
name: Li, Yanran
name: Zhang, Ningyu
name: Zhou, Yulin
name: Yang, Xiaosong
name: Wang, Zhao
Publisher: name: arXiv
Year: 2022
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: Image and Video Processing (eess.IV)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Skeleton-based human action recognition is a longstanding challenge due to its complex dynamics. Some fine-grain details of the dynamics play a vital role in classification. The existing work largely focuses on designing incremental neural networks with more complicated adjacent matrices to capture the details of joints relationships. However, they still have difficulties distinguishing actions that have broadly similar motion patterns but belong to different categories. Interestingly, we found that the subtle differences in motion patterns can be significantly amplified and become easy for audience to distinct through specified view directions, where this property haven't been fully explored before. Drastically different from previous work, we boost the performance by proposing a conceptually simple yet effective Multi-view strategy that recognizes actions from a collection of dynamic view features. Specifically, we design a novel Skeleton-Anchor Proposal (SAP) module which contains a Multi-head structure to learn a set of views. For feature learning of different views, we introduce a novel Angle Representation to transform the actions under different views and feed the transformations into the baseline model. Our module can work seamlessly with the existing action classification model. Incorporated with baseline models, our SAP module exhibits clear performance gains on many challenging benchmarks. Moreover, comprehensive experiments show that our model consistently beats down the state-of-the-art and remains effective and robust especially when dealing with corrupted data. Related code will be available on https://github.com/ideal-idea/SAP .
Mode iii notch fracture toughness assessment for various notch features
Creators: name: Torabi Ali Reza
name: Saboori Behnam
name: Ayatollahi Majid, R.
Publisher: name: Физическая мезомеханика
Year: 2017
Subjects: BRITTLE FRACTURE
NOTCH
MODE III LOADING
FAILURE CRITERION
FRACTURE TOUGHNESS
ХРУПКОЕ РАЗРУШЕНИЕ
НАДРЕЗ
НАГРУЖЕНИЕ ТИПА III
КРИТЕРИЙ РАЗРУШЕНИЯ
ВЯЗКОСТЬ РАЗРУШЕНИЯ

description: In the present paper, two stress-based failure criteria are proposed to predict the notch fracture toughness for three different notch features under pure mode III loading. These criteria are developed based on the two well-known failure concepts of the point-stress and the mean-stress previously used for predicting brittle fracture in notched members under various loading conditions. The validity of the criteria is verified through the comparison of their theoretical predictions with a bulk of test data reported in the open literature on mode III fracture of graphite notched round bars. Very good agreement is shown to exist between the experimental and theoretical results. Moreover, the comparison revealed that the mean-stress criterion is more accurate than the point-stress criterion in predicting mode III brittle fracture of V-notches and semicircular notches.
Super-resolution discrete-Fourier-transform spectroscopy using precisely periodic radiation beyond time window size limitation
Creators: name: Yasui, Takeshi
name: Iyonaga, Yuki
name: Hsieh, Yi-Da
name: Sakaguchi, Yoshiyuki
name: Hindle, Francis
name: Yokoyama, Shuko
name: Araki, Tsutomu
name: Hashimoto, Mamoru
Publisher: name: arXiv
Year: 2014
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Fourier transform spectroscopy (FTS) has been widely used in a variety of fields in research, industry, and medicine due to its high signal-to-noise ratio, simultaneous acquisition of signals in a broad spectrum, and versatility for different radiation sources. Further improvement of the spectroscopic performance will widen its scope of applications. Here, we demonstrate improved spectral resolution by overcoming the time window limitation using discrete Fourier transform spectroscopy (dFTS) with precisely periodic pulsed terahertz (THz) radiation. Since infinitesimal resolution can be achieved at periodically discrete frequencies when the time window size is exactly matched to the repetition period T, a combination of THz-dFTS with a spectral interleaving technique achieves a spectral resolution only limited by the spectral interleaving interval. Linewidths narrower than 1/(50T) are fully resolved allowing the attribution of rotational-transition absorption lines of low-pressure molecular gases within a 1.25 MHz band. The proposed method represents a powerful tool to improve spectrometer performance and accelerate the practical use of various types of FTS.
description: 26 pages, 5 figures
Gemino: Practical and Robust Neural Compression for Video Conferencing
Creators: name: Sivaraman, Vibhaalakshmi
name: Karimi, Pantea
name: Venkatapathy, Vedantha
name: Khani, Mehrdad
name: Fouladi, Sadjad
name: Alizadeh, Mohammad
name: Durand, Frédo
name: Sze, Vivienne
Publisher: name: arXiv
Year: 2022
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Video conferencing systems suffer from poor user experience when network conditions deteriorate because current video codecs simply cannot operate at extremely low bitrates. Recently, several neural alternatives have been proposed that reconstruct talking head videos at very low bitrates using sparse representations of each frame such as facial landmark information. However, these approaches produce poor reconstructions in scenarios with major movement or occlusions over the course of a call, and do not scale to higher resolutions. We design Gemino, a new neural compression system for video conferencing based on a novel high-frequency-conditional super-resolution pipeline. Gemino upsamples a very low-resolution version of each target frame while enhancing high-frequency details (e.g., skin texture, hair, etc.) based on information extracted from a single high-resolution reference image. We use a multi-scale architecture that runs different components of the model at different resolutions, allowing it to scale to resolutions comparable to 720p, and we personalize the model to learn specific details of each person, achieving much better fidelity at low bitrates. We implement Gemino atop aiortc, an open-source Python implementation of WebRTC, and show that it operates on 1024x1024 videos in real-time on a Titan X GPU, and achieves 2.2-5x lower bitrate than traditional video codecs for the same perceptual quality.
description: 13 pages, 5 appendix
Divergent phonon angular momentum driven by temperature and strain
Creators: name: Choi, Young-Jae
name: Jhi, Seung-Hoon
Publisher: name: arXiv
Year: 2022
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Applied Physics (physics.app-ph)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: The phonon angular momentum (PAM) may exhibit exotic temperature dependence as it is sensitive to the phonon lifetime. Constant phonon-lifetime approximation fails to depict such behavior. Here, we study the PAM of AlN, GaN, and graphene-like boron nitride (g-BN) monolayer with full consideration of phonon lifetime using first-principles calculations. We show that wurtzite AlN and GaN acquire divergent PAM at low temperatures from their lowest-lying phonon branches. The g-BN monolayer, on the other hand, does not have finite PAM at equilibrium structure. Rather it shows intriguing strain-dependence in PAM; the compressive strain greater than the critical size generates divergent PAM at low temperatures due to the divergent lifetime of TA phonons. As PAM couples with rotational excitations in solids associated with charge, spin, or electromagnetic fields, our study demonstrates a possibility of mechanical and thermal engineering of such excitations.
description: 37 pages, 16 figures, to be published in Physical Review B,
Continuous phase transition induced by non-Hermiticity in the quantum contact process model
Creators: name: He, Wen-Bin
name: Jin, Jiasen
name: Iemini, Fernando
name: Lin, Hai-Qing
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Non-Hermitian quantum system recently have attracted a lots of attentions theoretically and experimentally. However, the results based on the single-particle picture may not apply to understand the property of non-Hermitian many-body system. How the property of quantum many-body system especially the phase transition will be affected by the non-hermiticity remains unclear. Here we study non-Hermitian quantum contact process (QCP) model, whose effective Hamiltonian is derived from Lindbladian master equation. We show that there is a continuous phase transition induced by the non-hermiticity in QCP. We also determine the critical exponents $β$ of order parameter, $γ$ of susceptibility and study the correlation and entanglement near phase transition. We observe that the order parameter and susceptibility display infinitely singularity even for finite size system, since non-hermiticity endow many-body system with different singular behaviour from classical phase transition. Moreover our results show that the phase transition have no counterpart in Hermitian case and belongs to completely different universality class.
Study of the characteristics of GEM detectors for the future FAIR experiment CBM
Creators: name: Biswas, S.
name: Abuhoza, A.
name: Frankenfeld, U.
name: Hehner, J.
name: Schmidt, C. J.
name: Schmidt, H. R.
name: Traeger, M.
name: Colafranceschi, S.
name: Marinov, A.
name: Sharma, A.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Characteristics of triple GEM detector have been studied systematically. The variation of the effective gain and energy resolution of GEM with variation of the applied voltage has been measured with Fe55 X-ray source for different gas mixtures and with different gas flow rates. Long-term test of the GEM has also been performed.
description: 2 Pages, 6 figures
On the thermalization of the three-dimensional, incompressible, Galerkin-truncated Euler equation
Creators: name: Murugan, Sugan Durai
name: Ray, Samriddhi Sankar
Publisher: name: arXiv
Year: 2022
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: The long-time solutions of the Galerkin-truncated three-dimensional, incompressible Euler equation relax to an absolute equilibrium as a consequence of phase space and kinetic energy conservation in such a finite-dimensional system. These thermalized solutions are characterised by a Gibbs distribution of the velocity field and kinetic energy equipartition amongst its (finite) Fourier modes. We now show, through detailed numerical simulations, the triggers for the inevitable thermalization in physical space and how the problem is reducible to an effective one-dimensional problem making comparisons with the more studied Burgers equation feasible. We also discuss how our understanding of the mechanism of thermalization can be exploited to numerically obtain dissipative solutions of the Euler equations and evidence for or against finite-time blow-up in computer simulations.
description: 10 pages, 8 figures
On the Instrument Profile of Slit Spectrographs
Creators: name: Casini, R.
name: de Wijn, A. G.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Optics (physics.optics)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: We derive an analytic expression for the instrument profile of a slit spectrograph, also known as the line spread function. While this problem is not new, our treatment relies on the operatorial approach to the description of diffractive optical systems, which provides a general framework for the analysis of the performance of slit spectrographs under different illumination conditions. Based on our results, we propose an approximation to the spectral resolution of slit spectrographs, taking into account diffraction effects and sampling by the detector, which improves upon the often adopted approximation based on the root-sumsquare of the individual contributions from the slit, the grating, and the detector pixel.
First order electroweak phase transition triggered by the Higgs portal vector dark matter
Creators: name: Chao, Wei
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We investigate an extension of the Standard Model (SM) with a U(1)' gauge symmetry, which is spontaneously broken by a complex scalar singlet and where the new gauge boson is a stable dark matter candidate via a Z2 flavor symmetry. The possibility of generating a strongly first order electroweak phase transition (EWPT) needed for the electroweak baryogenesis mechanism in this model is studied using a gauge independent method. Our result shows a considerable parameter space where both successful dark matter phenomenologies and a strongly first order EWPT can be achieved.
description: 16 pages, 4 figures
Data-driven numerical site response
Creators: name: Garcia-Suarez, Joaquin
name: Cornet, Arthur
name: Wattel, Sacha
name: Molinari, Jean-François
Publisher: name: arXiv
Year: 2022
Subjects: subject: Geophysics (physics.geo-ph)
subject: FOS: Physical sciences

description: Prediction of ground motion triggered by earthquakes is a prime concern for both the seismology community and geotechnical earthquake engineering one. The subfield occupied with such a problem is termed site response analysis (SRA), its one-dimensional flavor (1D-SRA) being particularly popular given its simplicity. Despite the simple geometrical setting, a paramount challenge remains when it comes to numerically consider intense shaking in the soft upper soil strata of the crust: how to mathematically model the high-strain, dissipative, potentially rate-dependent soil behavior. Both heuristics models and phenomenological constitutive laws have been developed to meet the challenge, neither of them being exempt of either numerical limitations or physical inadequacies or both. We propose herein to bring the novel data-driven paradigm to bear, thus giving away with the need to construct constitutive behavior models altogether. Data-driven computational mechanics (DDCM) is a novel paradigm in solid mechanics that is gaining popularity; in particular, the multiscale version of it relies on studying the response of the microstructure (in the case of soil, representative volumes containing grains) to populate a dataset that is later used to inform the response at the macroscale. This manuscript presents the first application of multiscale DDCM to 1D-SRA: first, we demonstrate its capacity to handle wave propagation problems using discrete datasets, obtained via sampling grain ensembles using the discrete element method (DEM), in lieu of a constitutive law and then we apply it specifically to analyze the propagation of harmonic waves in a soft soil deposit that overlies rigid bedrock. We validate the implementation via comparison to regular finite elements analyses (FEA) and demonstrate that traditional amplification functions are recovered when using the DDCM.
description: 14 pages, 7 figures
Composite Operator Method analysis of the underdoped cuprates puzzle
Creators: name: Avella, Adolfo
Publisher: name: arXiv
Year: 2014
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The microscopical analysis of the unconventional and puzzling physics of the underdoped cuprates, as carried out lately by means of the Composite Operator Method (COM) applied to the 2D Hubbard model, is reviewed and systematized. The 2D Hubbard model has been adopted as it has been considered the minimal model capable to describe the most peculiar features of cuprates held responsible for their anomalous behavior. COM is designed to endorse, since its foundations, the systematic emergence in any SCS of new elementary excitations described by composite operators obeying non-canonical algebras. In this case (underdoped cuprates - 2D Hubbard model), the residual interactions - beyond a 2-pole approximation - between the new elementary electronic excitations, dictated by the strong local Coulomb repulsion and well described by the two Hubbard composite operators, have been treated within the Non Crossing Approximation. Given this recipe and exploiting the few unknowns to enforce the Pauli principle content in the solution, it is possible to qualitatively describe some of the anomalous features of high-Tc cuprate superconductors such as large vs. small Fermi surface dichotomy, Fermi surface deconstruction (appearance of Fermi arcs), nodal vs. anti-nodal physics, pseudogap(s), kinks in the electronic dispersion. The resulting scenario envisages a smooth crossover between an ordinary weakly-interacting metal sustaining weak, short-range antiferromagnetic correlations in the overdoped regime to an unconventional poor metal characterized by very strong, long-but-finite-range antiferromagnetic correlations leading to momentum-selective non-Fermi liquid features as well as to the opening of a pseudogap and to the striking differences between the nodal and the anti-nodal dynamics in the underdoped regime.
description: 30 PRB pages, 13 figures, 35 panels
PCA-based Channel Estimation for MIMO Communications
Creators: name: Soares, Jonathan Aguiar
name: Mayer, Kayol Soares
name: Valadares, Pedro Benevenuto
name: Arantes, Dalton Soares
Publisher: name: arXiv
Year: 2022
Subjects: subject: Information Theory (cs.IT)
subject: Signal Processing (eess.SP)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: In multiple-input multiple-output communications, channel estimation is paramount to keep base stations and users on track. This paper proposes a novel PCA-based-principal component analysis-channel estimation approach for MIMO orthogonal frequency division multiplexing systems. The channel frequency response is firstly estimated with the least squares method, and then PCA is used to filter only the higher singular components of the channel impulse response, which is then converted back to the frequency domain. The proposed approach is compared with the MMSE, the minimum mean square error estimation, in terms of bit error rate versus Eb/N0.
description: 5 pages, 7 figures, XL SIMP\'OSIO BRASILEIRO DE TELECOMUNICA\c{C}\~OES E PROCESSAMENTO DE SINAIS (SBrT 2022)
title: ÐÐ°ÑÐµÑÑÐ²Ð¾ Ð¾ÐºÑÑÐ¶Ð°ÑÑÐµÐ³Ð¾ Ð²Ð¾Ð·Ð´ÑÑ Ð° Ð¸ Ð¿ÑÐ¾Ð´ÑÐºÑÐ¸Ð²Ð½Ð¾ÑÑÑ ÑÑÑÐ´Ð°
title: ÑÑÐµÐ±Ð½Ð¾Ðµ Ð¿Ð¾ÑÐ¾Ð±Ð¸Ðµ
titleType: Subtitle
Creators: name: ÐÐ»ÑÑÐ¾Ð², ÐÐ»Ð°Ð´Ð¸Ð¼Ð¸Ñ
Publisher: name: ÐÐÐÐÐ¢ÐÐ¥-ÐÐ ÐÐ¡Ð¡
Year: 2024
Subjects: ÐÐ¾Ð·Ð´ÑÑ

description: ÐÐ¾ÑÑÐ±Ð° Ñ Ð·Ð°Ð³ÑÑÐ·Ð½ÐµÐ½Ð¸ÐµÐ¼ Ð²Ð¾Ð·Ð´ÑÑÐ° ÑÑÐµÐ±ÑÐµÑ ÑÐºÑÑÑÐµÐ½Ð½ÑÑ Ð¼ÐµÑ. Ð Ð¿Ð¾ÑÐ¾Ð±Ð¸Ð¸ ÑÐ°ÑÑÐ¼Ð¾ÑÑÐµÐ½Ñ Ð¸ÑÑÐ¾ÑÐ½Ð¸ÐºÐ¸ Ð·Ð°Ð³ÑÑÐ·Ð½ÐµÐ½Ð¸Ñ Ð²Ð¾Ð·Ð´ÑÑÐ°, Ð¾ÑÐ¾Ð±ÐµÐ½Ð½Ð¾ÑÑÐ¸ ÐµÐ³Ð¾ Ð²Ð»Ð¸ÑÐ½Ð¸Ñ Ð½Ð° Ð·Ð´Ð¾ÑÐ¾Ð²ÑÐµ Ð»ÑÐ´ÐµÐ¹ Ð¸ ÑÐºÐ¾Ð½Ð¾Ð¼Ð¸ÐºÑ ÑÑÑÐ°Ð½Ñ. ÐÑÐ¾Ð±Ð¾ Ð²ÑÐ´ÐµÐ»ÐµÐ½Ñ Ð²Ð¾Ð¿ÑÐ¾ÑÑ Ð²Ð»Ð¸ÑÐ½Ð¸Ñ Ð·Ð°Ð³ÑÑÐ·Ð½ÐµÐ½Ð¸Ñ Ð²Ð¾Ð·Ð´ÑÑÐ° Ð½Ð° ÑÐ°Ð±Ð¾ÑÑ Ð² Ð¿Ð¾Ð¼ÐµÑÐµÐ½Ð¸ÑÑ, ÑÑÐµÐ±Ð½ÑÑ ÐºÐ»Ð°ÑÑÐ°Ñ. ÐÐ°ÑÐµÑÐ¸Ð°Ð» Ð¿Ð¾ÑÐ¾Ð±Ð¸Ñ Ð¾ÑÐ¸ÐµÐ½ÑÐ¸ÑÐ¾Ð²Ð°Ð½ Ð½Ð° ÑÑÑÐ´ÐµÐ½ÑÐ¾Ð², Ð¿ÑÐµÐ¿Ð¾Ð´Ð°Ð²Ð°ÑÐµÐ»ÐµÐ¹ Ð¸ ÑÐ°Ð±Ð¾ÑÐ½Ð¸ÐºÐ¾Ð² Ð²ÑÐ·Ð¾Ð². ÐÐ½ Ð¿Ð¾Ð¼Ð¾Ð³Ð°ÐµÑ Ð¾ÑÐ¾Ð·Ð½Ð°ÑÑ ÑÐµÑÑÐµÐ·Ð½Ð¾ÑÑÑ Ð¿ÑÐ¾Ð±Ð»ÐµÐ¼Ñ Ð¸ Ð¾ÑÐ¸ÐµÐ½ÑÐ¸ÑÑÐµÑ Ð½Ð° Ð²ÑÑÐ°Ð±Ð¾ÑÐºÑ Ð¼ÐµÑÐ¾Ð¿ÑÐ¸ÑÑÐ¸Ð¹ Ð¿Ð¾ ÑÐ½Ð¸Ð¶ÐµÐ½Ð¸Ñ Ð·Ð°Ð³ÑÑÐ·Ð½ÐµÐ½Ð¸Ñ Ð¾ÐºÑÑÐ¶Ð°ÑÑÐµÐ³Ð¾ Ð²Ð¾Ð·Ð´ÑÑÐ°. ÐÐ¾ÑÐ¾Ð±Ð¸Ðµ ÑÐµÐºÐ¾Ð¼ÐµÐ½Ð´ÑÐµÑÑÑ Ð¸ÑÐ¿Ð¾Ð»ÑÐ·Ð¾Ð²Ð°ÑÑ Ð² ÑÐ°Ð¼ÐºÐ°Ñ Ð¾ÑÐ½Ð¾Ð²Ð½Ð¾Ð¹ Ð¾Ð±ÑÐ°Ð·Ð¾Ð²Ð°ÑÐµÐ»ÑÐ½Ð¾Ð¹ Ð¿ÑÐ¾Ð³ÑÐ°Ð¼Ð¼Ñ Ð¸ Ð¿Ð¾Ð²ÑÑÐµÐ½Ð¸Ñ ÐºÐ²Ð°Ð»Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¸ Ð¿Ð¾ Ð´Ð¸ÑÑÐ¸Ð¿Ð»Ð¸Ð½Ðµ Â«ÐÑÑÐ°Ð½Ð° ÑÑÑÐ´Ð°Â».
Cavity-mediated thermal control of metal-to-insulator transition in 1T-TaS$_{2}$
Creators: name: Jarc, Giacomo
name: Mathengattil, Shahla Yasmin
name: Montanaro, Angela
name: Giusti, Francesca
name: Rigoni, Enrico Maria
name: Sergo, Rudi
name: Fassioli, Francesca
name: Winnerl, Stephan
name: Zilio, Simone Dal
name: Mihailovic, Dragan
name: Prelovšek, Peter
name: Eckstein, Martin
name: Fausti, Daniele
Publisher: name: arXiv
Year: 2022
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Placing quantum materials into optical cavities provides a unique platform for controlling quantum cooperative properties of matter, via both weak and strong light-matter coupling. Here we report the experimental evidence of reversible cavity control of a metal-to-insulator phase transition in a correlated solid-state material. We embed the charge density wave material 1T-TaS$_{2}$ into cryogenic tunable terahertz cavities and show that a switch between conductive and insulating behaviors, associated with a large change in the sample temperature, is obtained by mechanically tuning the distance between the cavity mirrors and their alignment. The large thermal modification observed is indicative of a Purcell-like scenario in which the spectral profile of the cavity modifies the energy exchange between the material and the external electromagnetic field. Our findings provide opportunities for controlling the thermodynamics and macroscopic transport properties of quantum materials by engineering their electromagnetic environment.
description: 52 pages, 36 figures (including Supplementary Information)
Classification of singularities in the problem of motion of the Kovalevskaya top in a double force field
Creators: name: Ryabov, P. E.
name: Kharlamov, M. P.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences
subject: 70E17, 70G40

description: The problem of motion of the Kovalevskaya top in a double force field is investigated (the integrable case of A.G. Reyman and M.A. Semenov-Tian-Shansky without a gyrostatic momentum). It is a completely integrable Hamiltonian system with three degrees of freedom not reducible to a family of systems with two degrees of freedom. The critical set of the integral map is studied. The critical subsystems and bifurcation diagrams are described. The classification of all nondegenerate critical points is given. The set of these points consists of equilibria (nondegenerate singularities of rank 0), of singular periodic motions (nondegenerate singularities of rank 1), and also of critical two-frequency motions (nondegenerate singularities of rank 2).
description: LaTex, 30 pages, in Russian, 6 figures, 32 references. Submitted version
Scalable Discovery and Continuous Inventory of Personal Data at Rest in Cloud Native Systems
Creators: name: Grünewald, Elias
name: Schurbert, Leonard
Publisher: name: arXiv
Year: 2022
Subjects: subject: Cryptography and Security (cs.CR)
subject: Computers and Society (cs.CY)
subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: Cloud native systems are processing large amounts of personal data through numerous and possibly multi-paradigmatic data stores (e.g., relational and non-relational databases). From a privacy engineering perspective, a core challenge is to keep track of all exact locations, where personal data is being stored, as required by regulatory frameworks such as the European General Data Protection Regulation. In this paper, we present Teiresias, comprising i) a workflow pattern for scalable discovery of personal data at rest, and ii) a cloud native system architecture and open source prototype implementation of said workflow pattern. To this end, we enable a continuous inventory of personal data featuring transparency and accountability following DevOps/DevPrivOps practices. In particular, we scope version-controlled Infrastructure as Code definitions, cloud-based storages, and how to integrate the process into CI/CD pipelines. Thereafter, we provide iii) a comparative performance evaluation demonstrating both appropriate execution times for real-world settings, and a promising personal data detection accuracy outperforming existing proprietary tools in public clouds.
description: Preprint of 2022-09-09 before final copy-editing of an accepted peer-reviewed paper to appear in the Proceedings of the 20th International Conference on Service-Oriented Computing ICSOC 2022
COM(3p) solution of the 2D Hubbard model: momentum resolved quantities
Creators: name: Avella, Adolfo
Publisher: name: arXiv
Year: 2014
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Recently, within the framework of the Composite Operator Method, it has been proposed a three-pole solution for the two-dimensional Hubbard model [Eur. Phys. J. B 87, 45 (2014)], which is still considered one of the best candidate model to microscopically describe high-$T_{c}$ cuprate superconductors. The operatorial basis comprise the two Hubbard operators (complete fermionic local basis) and the electronic operator dressed by the nearest-neighbor spin fluctuations. The effectiveness of the approximate solution has been proved through a positive comparison with different numerical methods for various quantities. In this article, after recollecting the main analytical expressions defining the solution and the behavior of basic local quantities (double occupancy and chemical potential) and of the quasi-particle energy dispersions, we resolve and analyze the momentum components of relevant quantities: filling (i.e. the momentum distribution function), double occupancy and nearest-neighbor spin correlation function. The analysis is extended to COM(2p) solutions that will be used as primary reference. Thanks to this, the role played by the third field, with respect to the two Hubbard ones, in determining the behavior of many relevant quantities and in allowing the extremely good comparison with numerical results is better understood giving a guideline to further improve and, possibly, optimize the application of the COM to the Hubbard model.
description: 9 PRB pages, 3 figures, 10 panels. arXiv admin note: substantial text overlap with arXiv:1401.8110
Properties of High-Density Matter in Neutron Stars
Creators: name: Weber, Fridolin
name: Contrera, Gustavo A.
name: Orsaria, Milva G.
name: Spinella, William
name: Zubairi, Omair
Publisher: name: arXiv
Year: 2014
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: This short review aims at giving a brief overview of the various states of matter that have been suggested to exist in the ultra-dense centers of neutron stars. Particular emphasis is put on the role of quark deconfinement in neutron stars and on the possible existence of compact stars made of absolutely stable strange quark matter (strange stars). Astrophysical phenomena, which distinguish neutron stars from quark stars, are discussed and the question of whether or not quark deconfinement may occur in neutron stars is investigated. Combined with observed astrophysical data, such studies are invaluable to delineate the complex structure of compressed baryonic matter and to put firm constraints on the largely unknown equation of state of such matter.
description: 9 pages, 7 figures. Published as a Brief Review in MPLA
Non-unitarisable representations and maximal symmetry
Creators: name: Ferenczi, Valentin
name: Rosendal, Christian
Publisher: name: arXiv
Year: 2014
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics

description: We investigate questions of maximal symmetry in Banach spaces and the structure of certain bounded non-unitarisable groups on Hilbert space. In particular, we provide structural information about bounded groups with an essentially unique invariant complemented subspace. This is subsequently combined with rigidity results for the unitary representation of ${\rm Aut}(T)$ on $\ell_2(T)$, where $T$ is the countably infinite regular tree, to describe the possible bounded subgroups of ${\rm GL}(\mathcal H)$ extending a well-known non-unitarisable representation of $\mathbb F_\infty$. As a related result, we also show that a transitive norm on a separable Banach space must be strictly convex.
Co-designing a motivational interviewing training platform to enhance oncology healthcare professional communication
Creators: name: Dang, Thu Ha
name: Ludlow, C
name: Borle, H
name: Alexander, Marliese
name: Wickramasinghe, Nilmini
name: Burbury, K
name: Jayaraman, PP
name: Schofield, Penelope
Publisher: name: La Trobe
Year: 2024
Subjects: classificationCode: 4203
subject: Health services and systems
classificationCode: 420505
subject: Nursing workforce
classificationCode: 3211
subject: Oncology and carcinogenesis
classificationCode: 4205
subject: Nursing
subject: FOS: Health sciences
classificationCode: 42
subject: Health sciences

description: Background: Oncology healthcare professionals (HCPs) using motivational interviewing may motivate and support patients with chronic illness to adhere to medications. Research of online motivational interviewing training focusing on medication adherence in cancer is limited. Objective: Co-design, develop, and preliminarily evaluate a motivational interviewing training platform (MITP) for oncology HCPs focused on medication adherence. Methods: We used co-design and design science research methodology to develop and test the MITP in two phases: 1) program co-design and development and 2) interactive platform design and development. Results: HCPs expressed a high demand for a practical and tailored motivational interviewing training. MITP is an online three-hour training comprising education, roleplay videos, and formative assessments. MITP was reported to be acceptable, usable, and useful by users. Innovation: This study used a novel approach combining co-design and design science research methodology, and digital media to develop a flexible and acceptable online motivational interviewing training focused on medication adherence in cancer. Discussion and conclusion: Applied rigorous methodology ensured the MITP was developed to address knowledge gaps and the needs of oncology HCPs for supporting patient adherence, and to be usable and useful. Study findings may inform future research on online motivational interviewing training and its potential impact on medication adherence.
Adaptive sampling dual terahertz comb spectroscopy using free-running dual femtosecond lasers
Creators: name: Yasui, Takeshi
name: Ichikawa, Ryuji
name: Hsieh, Yi-Da
name: Hayashi, Kenta
name: Cahyadi, Harsono
name: Hindle, Francis
name: Sakaguchi, Yoshiyuki
name: Iwata, Tetsuo
name: Mizutani, Yasuhiro
name: Yamamoto, Hirotsugu
name: Minoshima, Kaoru
name: Inaba, Hajime
Publisher: name: arXiv
Year: 2014
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Dual terahertz (THz) comb spectroscopy is a promising methods for high accuracy, high resolution, and broadband THz spectroscopy because the mode-resolved THz comb spectrum possesses both characteristics of broadband THz radiation and narrow-linewidth continuous-wave THz radiation and all frequency mode of THz comb can be phase-locked to a microwave frequency standard. However, requirement of stabilized dual femtosecond lasers has often hindered wide use of this method. In this article, we demonstrated the adaptive sampling, dual THz comb spectroscopy, enabling use of free-running dual femtosecond lasers. To correct the non-linearity of time and frequency scale caused by the laser timing jitter, an adaptive sampling clock is generated by dual THz-comb-referenced spectrum analysers and is used for a timing signal in a data acquisition board. The demonstrated results did not only indicate the implementation of dual THz comb spectroscopy with free-running dual lasers but also implied the superiority of its spectroscopic performance over the dual THz comb spectroscopy with stabilized dual lasers.
description: 28 pages, 6 figures
Phase separation in binary Bose mixtures at finite temperature
Creators: name: Spada, G.
name: Parisi, L.
name: Pascual, G.
name: Parker, N. G.
name: Billam, T. P.
name: Pilati, S.
name: Boronat, J.
name: Giorgini, S.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Computational Physics (physics.comp-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We investigate the magnetic behavior of finite-temperature repulsive two-component Bose mixtures by means of exact path-integral Monte-Carlo simulations. Novel algorithms are implemented for the free energy and the chemical potential of the two components. Results on the magnetic susceptibility suggest that the conditions for phase separation are not modified from the zero temperature case. This contradicts previous predictions based on approximate theories. We also determine the temperature dependence of the chemical potential and the contact parameters for experimentally relevant balanced mixtures.
description: v2: 19 pages, 10 figures, matches published version; v1: 6 pages, 5 figures plus supplemental material of 8 pages, 5 figures)