cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Deviations from the extended London model at high magnetic fields in YBa$_2$Cu$_3$O$_7$
Creators: name: Campillo, E.
name: Bartkowiak, M.
name: Riyat, R.
name: Jellyman, E.
name: Cameron, A. S.
name: Holmes, A. T.
name: Prokhnenko, O.
name: Stein, W. -D.
name: Erb, A.
name: Forgan, E. M.
name: Blackburn, E.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We report on the evolution with magnetic field and temperature of the vortex lattice (VL) in fully-oxygenated YBa2Cu3O7 as studied by time-of-flight small angle neutron scattering. Using the HFM/EXED beamline, we have obtained data up to 25.9 T - much higher than that available previously. Our VL structure results indicate the progressive suppression by field of the superconductivity along the crystallographic b (CuO chain) direction. The intensity of the diffracted signal reveals the spatial variation of magnetization caused by the VL (the "form factor"). Instead of a rapid fall-off with field, as seen in superconductors with smaller upper critical fields, we find that the form factor is almost constant with field above about 12 T. We speculate that this is due to Pauli paramagnetic moments, which increase at high fields due to alignment of the spins of quasiparticles in the vortex cores.
description: 8 pages, 6 figures
Influence of dry grinding on physicochemical and surface properties of talc
Creators: name: Arsoy, Zeyni
name: Ersoy, Bahri
name: Evcin, Atilla
name: Icduygu, Mehmet G.
Publisher: name: Faculty of Geoengineering, Mining and Geology, Wrocław University of Technology, Wrocław
Year: 2017
Subjects: whiteness
oil absorption
surface free energy
contact angle
grinding
talc

description: Physicochemical Problems of Mineral Processing; ISSN 2084-4735
A cyclonic-static micro bubble flotation column for enhancing coalescence of oil droplets from emulsion
Creators: name: Li, Xiaobing
name: Yan, Xiaokang
name: Zhang, Haijun
Publisher: name: Faculty of Geoengineering, Mining and Geology, Wrocław University of Technology, Wrocław
Year: 2017
Subjects: oily wastewater
multi-flow pattern
coalescence
cyclonic-static micro bubble flotation column

description: Physicochemical Problems of Mineral Processing; ISSN 2084-4735
NuSTAR discovery of a cyclotron line in GRO J1750-27
Creators: name: Devaraj, Ashwin
name: Paul, Biswajit
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: GRO J1750-27, discovered during an outburst in 1995 with CGRO-BATSE, is one of the farthest known galactic Be-X-ray binary systems. This relatively poorly studied system recently went into an outburst in September 2021. The source was observed during the latest outburst using the NuSTAR telescope during the rising phase of the outburst. We estimate the spin period of the source to be 4.45 s using which we produced energy-resolved pulse profiles between 3 and 65 keV. We find that the profile is double-peaked at low energies (<18 keV) while evolving into a single peak at higher energies (>18 keV). The broadband spectrum of this source was fitted well with a high energy cutoff power-law model and we report the discovery of a cyclotron resonant scattering feature (CRSF) in this source at 43 keV, indicating a magnetic field strength of $3.7 \times 10^{12}$ G. Our estimate of the magnetic field strength using the cyclotron line is consistent with the estimates made earlier using the accretion torque model from measurements of spin-up rates and fluxes during the previous outbursts.
description: 6 pages, 6 figures, 1 table. Accepted for publication in MNRAS letters
A quick method for Bond work index approximate value determination
Creators: name: Todorovic, Dejan
name: Trumic, Maja
name: Andric, Ljubisa
name: Milosevic, Vladan
name: Trumic, Milan
Publisher: name: Faculty of Geoengineering, Mining and Geology, Wrocław University of Technology, Wrocław
Year: 2017
Subjects: kinetics
grinding
Bond work index

description: Physicochemical Problems of Mineral Processing; ISSN 2084-4735
NuSTAR discovery of the hard X-ray emission and a wide-band X-ray spectrum from the Pictor A western hot spot
Creators: name: Sunada, Yuji
name: Morimoto, Arisa
name: Tashiro, Makoto S.
name: Terada, Yukikatsu
name: Katsuda, Satoru
name: Sato, Kosuke
name: Tateishi, Dai
name: Sasaki, Nobuaki
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Utilizing \textit{Chandra}, \textit{XMM-Newton} and \textit{NuSTAR}, a wide-band X-ray spectrum through 0.2 to 20 keV is reported from the western hot spot of Pictor A. In particular, the X-ray emission is significantly detected in the 3 to 20 keV band at 30 sigma by \textit{NuSTAR}. This is the first detection of hard X-rays with energies above 10 keV from a jet termination hot spot of active galactic nuclei. The hard X-ray spectrum is well described with a power-law model with a photon index of $\mathitΓ=1.8\pm0.2$, and the flux is obtained to be $(4.5\pm0.4)\times10^{-13}$ erg s$^{-1}$ cm$^{-2}$ in the 3 to 20 keV band. The obtained spectrum is smoothly connected with those soft X-ray spectra observed by \textit{Chandra} and \textit{XMM-Newton}. The wide-band spectrum shows a single power-law spectrum with a photon index of $\mathitΓ=2.07\pm0.03$, excluding any cut-off/break features. Assuming the X-rays as synchrotron radiation of the electrons, the energy index of the electrons is estimated as $p=2\mathitΓ-1=3.14\pm0.06$ from the wide-band spectrum. Given that the X-ray synchrotron emitting electrons quickly lose their initial energies via synchrotron radiation, the energy index of electrons at acceleration sites is estimated as $p_\mathrm{acc}=p-1=2.14\pm0.06$. This is consistent with the prediction of the diffusive shock acceleration. Since the spectrum has no cut-off feature up to 20 keV, the maximum electron energy is estimated to be no less than 40 TeV.
description: 10 pages, 9 figures, accepted for publication in PASJ
Flotation of molybdenite in the presence of microemulsified collector
Creators: name: You, Xiaofang
name: Li, Lin
name: Lyu, Xianjun
Publisher: name: Faculty of Geoengineering, Mining and Geology, Wrocław University of Technology, Wrocław
Year: 2017
Subjects: diesel
microemulsified collector
flotation
molybdenite

description: Physicochemical Problems of Mineral Processing; ISSN 2084-4735
Observational constraints on the origin of the elements. IV: The standard composition of the Sun
Creators: name: Magg, Ekaterina
name: Bergemann, Maria
name: Serenelli, Aldo
name: Bautista, Manuel
name: Plez, Bertrand
name: Heiter, Ulrike
name: Gerber, Jeffrey M.
name: Ludwig, Hans-Günter
name: Basu, Sarbani
name: Ferguson, Jason W.
name: Gallego, Helena Carvajal
name: Gamrath, Sébastien
name: Palmeri, Patrick
name: Quinet, Pascal
Publisher: name: arXiv
Year: 2022
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The chemical composition of the Sun is requested in the context of various studies in astrophysics, among them in the calculation of the standard solar models (SSMs), which describe the evolution of the Sun from the pre-main-sequence to its present age. In this work, we provide a critical re-analysis of the solar chemical abundances and corresponding SSMs. For the photospheric values, we employ new high-quality solar observational data collected with the IAG facility, state-of-the art non-equilibrium modelling, new oscillator strengths, and different atmospheric models, including the MARCS model, but also averages based on Stagger and CO5BOLD 3D radiation-hydrodynamics simulations of stellar convection. We perform new calculations of oscillator strengths for transitions in O I and N I. For O I - the critical element for the interior models - calculations are carried out using several independent methods. We find unprecedented agreement between the new estimates of transition probabilities, thus supporting our revised solar oxygen abundance. We also provide new estimates of the noble gas Ne abundance. We investigate our results in comparison with the previous estimates. We discuss the consistency of our photospheric measurements with meteoritic values taking into account systematic and correlated errors. Finally, we provide revised chemical abundances, leading to a new value of the solar photospheric present-day metallicity $Z/X = 0.0225$, and employ them in the calculations of the SSM. We find that the puzzling mismatch between the helioseismic constraints on the solar interior structure and the model is resolved with the new chemical composition.
description: accepted for publication in A&A
Fernando Ligue Engamba, Patrimoine de l’Est-Cameroun immatérialité et enjeux contemporains
Creators: name: Ligue Engamba, Fernando
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 470501
subject: African literature
classificationCode: 470507
subject: Comparative and transnational literature
classificationCode: 470514
subject: Literary theory

description: Fernando Ligue Engamba, Patrimoine de l’Est-Cameroun immatérialité et enjeux contemporains
Quasimodes in the cusp continuum in nonuniform magnetic flux tubes
Creators: name: Geeraerts, Michaël
name: Vanmechelen, Pieter
name: Van Doorsselaere, Tom
name: Soler, Roberto
Publisher: name: arXiv
Year: 2022
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Plasma Physics (physics.plasm-ph)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: The study of MHD waves is important both for understanding heating in the solar atmosphere and for solar atmospheric seismology. The analytical investigation of wave mode properties in a cylinder is of particular interest in this domain, as many atmospheric structures can be modeled as such in a first approximation. We use linearized ideal MHD to study quasimodes (global modes that are damped through resonant absorption) with a frequency in the cusp continuum, in a straight cylinder with a circular base and an inhomogeneous layer at its boundary which separates two homogeneous plasma regions inside and outside. We are in particular interested in the damping of these modes, and shall hence try to determine their frequency as a function of background parameters. After linearizing the ideal MHD equations, we find solutions to the second-order differential equation for the perturbed total pressure in the inhomogeneous layer in the form of Frobenius series around the regular singular points that are the Alfvén and cusp resonant positions, as well as power series around regular points. By connecting these solutions appropriately through the inhomogeneous layer and with the solutions of the homogeneous regions inside and outside the cylinder, we derive a dispersion relation for the frequency of the eigenmodes of the system. From the dispersion relation, it is also possible to find the frequency of quasimodes even though they are not eigenmodes. As an example, we find the frequency of the slow surface sausage quasimode as a function of the inhomogeneous layer's width, for values of the longitudinal wavenumber relevant for photospheric conditions. The results were found to match well the results found in another paper which studied the resistive slow surface sausage eigenmode. We also discuss the perturbation profiles of the quasimode and the eigenfunctions of continuum modes.
Quantitative Determination of Octylonium in Human Plasma by LC–MS
Creators: name: Kim, Kibum
name: Jung, Haehum
name: Yun, Hyi-Yoel
name: Moon, Seung-Ok
name: Yoon, Young-Ran
name: Kwon, Kwang-il
name: Kim, Hyesoo
name: Shon, Soojung
name: Kang, Wonku
Publisher: name: University of Illinois at Chicago
Year: 2024
Subjects: classificationCode: 3499
subject: Other chemical sciences
classificationCode: 34
subject: Chemical sciences
subject: FOS: Chemical sciences
classificationCode: 3401
subject: Analytical chemistry

description: The purpose of this investigation was to develop a method for measuring the concentration of octylonium in human plasma. Hydrochloric acid was added to the plasma samples before pretreatment to improve the stability of the octylonium. After liquid–liquid extraction with ethylacetate and isopropanol (10:1), the analytes were separated by chromatography on a reversed-phase C18 column and detected by LC–MS–MS with electrospray ionization–ionization. The coefficient of variation for the precision of the assay was less than 10.1%, and the accuracy ranged from 98.0 to 106.5%. The limit of quantification or sensitivity was 0.2 ng mL−1. This method was validated by measuring octylonium in the plasma of healthy human subjects after administration of a single 120-mg oral dose of octylonium bromide. Thus, a highly sensitive and accurate analytical method was developed to determine the concentration of octylonium in human plasma.
Suzaku Observations of Fe K-shell Lines in the Supernova Remnant W51C and Hard X-ray Sources in the Proximity
Creators: name: Shimaguchi, Aika
name: Nobukawa, Kumiko K.
name: Yamauchi, Shigeo
name: Nobukawa, Masayoshi
name: Fujita, Yutaka
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: In this paper, we investigated the Fe K-shell lines in the supernova remnant W51C and hard X-ray sources in the proximity. We measured the intensities of Fe I K$α$ and Fe XXV He$α$ lines at 6.40 keV and 6.68 keV, respectively, and found that the intensity of the 6.68 keV line is consistent with the background level expected from previous studies, while that of the 6.40 keV line is higher at the significance level of 2.0$σ$. Given the presence of gamma-ray emission and high ionization rate point spatially coincident with the remnant, we conclude that the enhanced 6.40 keV line most likely originates from the interaction between low-energy cosmic rays and molecular clouds. Also, we discovered an enhanced 6.68 keV line emission from the compact H II region G49.0-0.3 at the significance level of 3.4$σ$. Spectral analysis revealed that the temperature and abundance of the thermal plasma with the 6.68 keV line is $kT = 3.0^{+0.8}_{-0.7}$ keV and $Z = 0.5 \pm 0.2$ solar, respectively. These values are explained by the thermal plasma generated by the stellar winds of O stars.
description: 8 pages, 4 figures, accepted for publication in Publications of the Astronomical Society of Japan (PASJ)
Riemann problem for constant flow with single-point heating source
Creators: name: Yu, Changsheng
name: Feng, Chengliang
name: Zeng, Zhiqiang
name: Liu, Tiegang
Publisher: name: arXiv
Year: 2022
Subjects: subject: Analysis of PDEs (math.AP)
subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics
subject: 35L81, 80A20

description: This work focuses on the Riemann problem of Euler equations with global constant initial conditions and a single-point heating source, which comes from the physical problem of heating one-dimensional inviscid compressible constant flow. In order to deal with the source of Dirac delta-function, we propose an analytical frame of double classic Riemann problems(CRPs) coupling, which treats the fluids on both sides of the heating point as two separate Riemann problems and then couples them. Under the double CRPs frame, the solution is self-similar, and only three types of solution are found. The theoretical analysis is also supported by the numerical simulation. Furthermore, the uniqueness of the Riemann solution is established with some restrictions on the Mach number of the initial condition.
Detection of gamma rays around SNR HB9 and its implication to the diffusive shock-acceleration history
Creators: name: Oka, Tomohiko
name: Ishizaki, Wataru
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We analyze the GeV gamma-ray emission data from the vicinity of the supernova remnant (SNR) HB9 (G160.9+2.6) from the \textit{Fermi}-LAT 12-year observations to quantify the evolution of diffusive shock acceleration (DSA) in the SNR. In the vicinity of HB9, there are molecular clouds whose locations do not coincide with the SNR shell in the line of sight. We detect significant gamma-ray emissions above 1~GeV spatially coinciding with the two prominent cloud regions, as well as a emission from the SNR shell, the latter of which is consistent with the results of previous studies. The energy spectrum above 1~GeV in each region is fitted with a simple power-law function of $dN/dE \propto E^{-Γ}$. The fitting result indicates harder spectra with power-law indices of $Γ$ = $1.84 \pm 0.18$ and $1.84 \pm 0.14$ than that at the SNR shell with $Γ$= $2.55 \pm 0.10$. The observed spectra from the cloud regions are found to be consistent with the theoretically expected gamma-ray emissions originating in the protons that escaped from SNR HB9, where particles can be accelerated up to higher energies than those at the shell at present. The resultant diffusion coefficient in the vicinity of the SNR is comparable to that of the Galactic mean.
description: Accepted for publication in PASJ
Global Insights into Two Decades of Climate Legislation in Agriculture, Forestry and Fisheries
Creators: name: Stetter, Christian
Publisher: name: Unknown
Year: 2025
Subjects: subject: Agricultural and Food Policy
subject: Climate Change
subject: Climate change
subject: agriculture
subject: forestry
subject: fisheries
subject: policy evaluation
subject: natural language processing
subject: topic modeling
subject: artificial intelligence

description: Climate change necessitates immediate legislative action across all sectors, especially agriculture, forestry, and fisheries, due to their substantial role in climate change mitigation and their vulnerability to climate impacts. This study employs advanced AI-driven natural language processing to identify key patterns, trends, and themes, by analyzing 264,739 pages of climate-related legal texts from 189 countries in 51 languages between 2001 and 2022. The findings reveal a significant increase in climate-related legislation, with policies being the dominant governance instrument. Regional variations highlight differing legislative priorities, such as disaster preparedness in Asia and sustainable forestry in North America. The study demonstrates the alignment of climate legislation with Sustainable Development Goal (SDG) 13 (Climate Action) and its interactions with other SDGs, thus providing insights into policy coherence and gaps in resilience-building strategies. While sectoral climate legislation demonstrates connections to emissions and vulnerability, particularly in water and food security, other factors might be more influential. This research offers critical insights into the strengths and gaps in current climate policies in agriculture, forestry and fisheries, informing future strategies to enhance global climate action.
Periodic orbits in the 1:2:3 resonant chain and their impact on the orbital dynamics of the Kepler-51 planetary system
Creators: name: Antoniadou, Kyriaki I.
name: Voyatzis, George
Publisher: name: arXiv
Year: 2022
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Chaotic Dynamics (nlin.CD)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: Space missions have discovered a large number of exoplanets evolving in (or close to) mean-motion resonances (MMRs) and resonant chains. Often, the published data exhibit very high uncertainties due to the observational limitations that introduce chaos into the evolution of the system on especially shorter or longer timescales. We propose a study of the dynamics of such systems by exploring particular regions in phase space. We exemplify our method by studying the long-term orbital stability of the three-planet system Kepler-51 and either favor or constrain its data. It is a dual process which breaks down in two steps: the computation of the families of periodic orbits in the 1:2:3 resonant chain and the visualization of the phase space through maps of dynamical stability. We present novel results for the general four-body problem. Stable periodic orbits were found only in the low-eccentricity regime. We demonstrate three possible scenarios safeguarding Kepler-51, each followed by constraints. Firstly, there are the 2/1 and 3/2 two-body MMRs, in which $e_b<0.02$, such that these two-body MMRs last for extended time spans. Secondly, there is the 1:2:3 three-body Laplace-like resonance, in which $e_c<0.016$ and $e_d<0.006$ are necessary for such a chain to be viable. Thirdly, there is the combination comprising the 1/1 secondary resonance inside the 2/1 MMR for the inner pair of planets and an apsidal difference oscillation for the outer pair of planets in which the observational eccentricities, $e_b$ and $e_c$, are favored as long as $e_d\approx 0$. With the aim to obtain an optimum deduction of the orbital elements, this study showcases the need for dynamical analyses based on periodic orbits performed in parallel to the fitting processes.
description: Accepted for publication in A&A
Dual-Camera Localization of a Soft Robotic  End-Effector Utilizing Apples as Nodes
Creators: name: Ramos, Ariel
name: Bin Sabir, Syed Usama
name: Karkee, Manoj
name: Luo, Ming
Publisher: name: Zenodo
Year: 2025

description: Published in NRT-LEAD Annual Expo-2025 Booklet.
description: The declining availability of agricultural labor remains a significant challenge for the Washington apple industry, driving the need for automated harvesting solutions. Soft robotic systems offer promise for cost-effective and simpler harvesting robots to handle delicate produce. However, their non-linearized movements and lack of encoders make real-time end-effector localization difficult. A dual-camera system was implemented to track the end-effector’s position during in-lab testing. To address challenges in outdoor agricultural environments, a YOLOv8-based detection algorithm was trained on diverse conditions (e.g., morning, noon, cloudy, and sunny) from apple orchards in Central Washington, improving apple recognition for real-time localization. This boosted true positive readings from ~37% to 95%. A linear manipulation system was developed to evaluate the impact of movement of the end-effector and its camera and recorded framerate on detection precision within a multi-camera setup in the laboratory setting. Future work will refine camera-effective ranges, optimizing for the lowest framerate capable of minimizing localization error, and integrate visual feedback with actuator control to enhance the adaptability of the soft robotic arm. This research contributes to the development of scalable, vision-based robotic solutions for precision agriculture, addressing labor shortages in the apple industry.
Supplementary document for A reconfigurable THz metamaterial based on microelectromechanical cantilever switches with a dimpled tip - 6467511.pdf
Creators: name: Huang, Ying
name: Okatani, Taiyu
name: Inomata, Naoki
name: Kanamori, Yoshiaki
Publisher: name: Optica Publishing Group
Year: 2025
Subjects: subject: Mechanical Engineering
subject: FOS: Mechanical engineering

description: Measured optical constant of a bare SiO2 that used for the simulation model
Spectral softening in core-collapse supernova remnant expanding inside wind-blown bubble
Creators: name: Das, Samata
name: Brose, Robert
name: Meyer, Dominique M. -A.
name: Pohl, Martin
name: Sushch, Iurii
name: Plotko, Pavlo
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Context. Galactic cosmic rays are widely assumed to arise from diffusive shock acceleration, specifically at shocks in supernova remnants (SNRs). These shocks expand in a complex environment, particularly in the core-collapse scenario as these SNRs evolve inside the wind-blown bubbles created by their progenitor stars. The cosmic rays (CRs) at core-collapse SNRs may carry spectral signatures of that complexity. Aims. We study particle acceleration in the core-collapse SNR of a progenitor with initial mass 60 $M_\odot$ and realistic stellar evolution. The SNR shock interacts with discontinuities inside the wind-blown bubble and generates several transmitted and reflected shocks. We analyse their impact on particle spectra and the resulting emission from the remnant. Methods. The hydrodynamic equations for the evolution of SNR inside the pre-supernova circumstellar medium have been solved simultaneously with the transport equation for cosmic rays in test-particle approximation and with the induction equation for the magnetohydrodynamics (MHD) in 1-D spherical symmetry. Results. The evolution of core-collapse SNRs inside complex wind-blown bubbles modifies the spectra of both the particles and their emission. We have found softer particle spectra with spectral indices close to 2.5 during shock propagation inside the shocked wind, and this softness persists at later evolutionary stages. Further, our calculated total production spectrum released into the interstellar medium demonstrates spectral consistency at high energy with the galactic CRs injection spectrum, required in propagation models. The magnetic field structure effectively influences the emission morphology of SNR as it governs the transportation of particles and the synchrotron emissivity.
description: 14 pages, 13 figures, Accepted in Astronomy & Astrophysics
Multi-cavity gravito-acoustic modes in stars: A general analytical resonance condition
Creators: name: Pinçon, C.
name: Takata, M.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Asteroseismology has proven to be a powerful method for probing stellar interiors. Analytical descriptions of the global oscillation modes, in combination with pulsation codes, have provided valuable help in processing and interpreting the large amount of seismic data collected by the CoRoT, $Kepler$, and TESS missions. These prior results have paved the way to more in-depth analyses of the oscillation spectra of stars, which requires innovative theoretical descriptions of stellar oscillations. In this paper, we aim to analytically express the resonance condition of the spheroidal adiabatic oscillation modes in a very general way, applicable at different evolutionary stages. In the present formulation, a star is represented as an acoustic interferometer composed of a multitude of resonant cavities where waves can propagate and the short-wavelength JWKB approximation is met. Each cavity is separated from the adjacent ones by barriers, which corresponds to regions either where waves are evanescent or where the JWKB approximation fails. The stationary modes are computed using two different physical representations: 1) the infinite-time reflections picture 2) the linear boundary value problem picture. Both provide the same resonance condition, which ultimately turns out to depend on a number of parameters: the reflection and transmission phase lags introduced by each barrier, the coupling factor associated with each barrier, and the wave number integral over each resonant cavity. Using such a formulation, we can retrieve the usual forms derived in previous works (e.g., mixed modes with two or three cavities, low- and large-amplitude glitches). This resonance condition provides a new tool that is useful in predicting the stellar oscillation spectra and interpret seismic observations at different evolutionary stages. Practical applications are left to future work.
description: Accepted for publication in A&A, 20 pages
Using machine learning to auto-tune chi-squared tests for gravitational wave searches
Creators: name: McIsaac, Connor
name: Harry, Ian
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: The sensitivity of gravitational wave searches is reduced by the presence of non-Gaussian noise in the detector data. These non-Gaussianities often match well with the template waveforms used in matched filter searches, and require signal-consistency tests to distinguish them from astrophysical signals. However, empirically tuning these tests for maximum efficacy is time consuming and limits the complexity of these tests. In this work we demonstrate a framework to use machine-learning techniques to automatically tune signal-consistency tests. We implement a new $χ^2$ signal-consistency test targeting the large population of noise found in searches for intermediate mass black hole binaries, training the new test using the framework set out in this paper. We find that this method effectively trains a complex model to down-weight the noise, while leaving the signal population relatively unaffected. This improves the sensitivity of the search by $\sim 11\%$ for signals with masses $> 300 M_\odot$. In the future this framework could be used to implement new tests in any of the commonly used matched-filter search algorithms, further improving the sensitivity of our searches.
description: 10 pages, 5 figures. Supplementary data: https://icg-gravwaves.github.io/chisqnet/ . Version accepted for publication in PRD. Various updates made during review process. Typos corrected
Leading change: a phenomenological analysis of principals’ experience in a 1:1 computing initiative
Creators: name: Pautz, Stefani N.
Publisher: name: Maryland Shared Open Access Repository
Year: 2016

description: (Ed. D.) -- Towson University, 2016
description: One-to-one (1:1) computing initiatives, in which every learner is provided a personal computing device, have drawn researchers’ attention for over 30 years. The field has not, however, explored principals’ experiences leading the implementation of a 1:1 initiative. The purpose of this study was to build an understanding of principals’ experience leading the changes associated with a 1:1 initiative and the contexts or situations that influenced those experiences. Using phenomenology, this study explored how eight elementary school principals leading a 1:1 initiative viewed their role and responsibilities, promoted change, and responded to successes and challenges. Data, collected through journals and semi-structured interviews, were analyzed using the Modified Van Kaam method. Findings revealed themes of fulfilling the responsibility of Optimizer, acting as a Change Agent, ensuring educational innovation in digital age learning, facilitating and participating in learning communities, and establishing and leveraging strategic partnerships. The analysis showed that collaboration permeates all aspects of change leadership in this context. Together, the composite themes and final synthesis provide insight into the collective experience and the underlying universal leadership structures. This research provides a lens through which leaders can reflect upon their own experiences leading 1:1 computing initiatives and provides the foundation for research that will direct the field in developing support and professional development for principals leading these initiatives.
description: http://library.towson.edu/cdm/ref/collection/etd/id/50252
CP Rail station car record
Creators: name: Canadian Pacific Railway Company
Publisher: name: The University of British Columbia
Year: 2016

description: A register recording incoming and outgoing C.P.R. railroad cars at the Canadian Pacific Railway depot in Vancouver. Entries for outward billing, local inward revising and wharf revising provide the date, initials for foreign company cars, car numbers and other information with numbers perhaps indicating engine number and car position.
The SAMI Galaxy Survey: The internal orbital structure and mass distribution of passive galaxies from triaxial orbit-superposition Schwarzschild models
Creators: name: Santucci, Giulia
name: Brough, Sarah
name: van de Sande, Jesse
name: McDermid, Richard M.
name: van de Ven, Glenn
name: Zhu, Ling
name: D'Eugenio, Francesco
name: Bland-Hawthorn, Joss
name: Barsanti, Stefania
name: Bryant, Julia J.
name: Croom, Scott M.
name: Davies, Roger L.
name: Green, Andrew W.
name: Lawrence, Jon S.
name: Lorente, Nuria P. F.
name: Owers, Matt S.
name: Poci, Adriano
name: Richards, Samuel N.
name: Thater, Sabine
name: Yi, Sukyoung
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Dynamical models are crucial for uncovering the internal dynamics of galaxies, however, most of the results to date assume axisymmetry, which is not representative for a significant fraction of massive galaxies. Here, we build triaxial Schwarschild orbit-superposition models of galaxies taken from the SAMI Galaxy Survey, in order to reconstruct their inner orbital structure and mass distribution. The sample consists of 161 passive galaxies with total stellar masses in the range $10^{9.5}$ to $10^{12} M_{\odot}$. We find that the changes in internal structures within 1$R_{\rm e}$ are correlated with the total stellar mass of the individual galaxies. The majority of the galaxies in the sample ($73\% \pm 3\%$) are oblate, while $19\% \pm 3\%$ are mildly triaxial and $8\% \pm 2\%$ have triaxial/prolate shape. Galaxies with $\log M_{\star}/M_{\odot} > 10.50$ are more likely to be non-oblate. We find a mean dark matter fraction of $f_{\rm{DM}} = 0.28 \pm 0.20$, within 1$R_{\rm e}$. Galaxies with higher intrinsic ellipticity (flatter) are found to have more negative velocity anisotropy $β_r$ (tangential anisotropy). $β_r$ also shows an anti-correlation with the edge-on spin parameter \lam, so that $β_r$ decreases with increasing \lam. We see evidence of an increasing fraction of hot orbits with increasing stellar mass, while warm and cold orbits show a decreasing trend. We also find that galaxies with different ($V/σ$ - $h_3$) kinematic signatures have distinct combinations of orbits. These results are in agreement with a formation scenario in which slow- and fast-rotating galaxies form through two main channels.
description: 40 pages. Accepted for publication in ApJ
Seiberg-Witten geometry, modular rational elliptic surfaces and BPS quivers
Creators: name: Magureanu, Horia
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study the Coulomb branches of the rank-one 4d $\mathcal{N} = 2$ quantum field theories, including the KK theories obtained from the circle compactification of the 5d $\mathcal{N}= 1$ $E_n$ Seiberg theories. The focus is set on the relation between their Seiberg-Witten geometries and rational elliptic surfaces, with more attention being given to the modular surfaces, which we completely classify using the classification of subgroups of the modular group ${\rm PSL}(2,\mathbb{Z})$. We derive closed-form expressions for the modular functions for all congruence and some of the non-congruence subgroups associated with these geometries. Moreover, we show how the BPS quivers of these theories can be determined directly from the fundamental domains of the monodromy groups and study how changes of these domains can be interpreted as quiver mutations. This approach can also be generalized to theories whose Coulomb branches contain `undeformable' singularities, leading to known quivers of such theories.
description: 63 pages plus appendix, many figures; v2: added references, corrected typos
CP Rail station car record outward billing
Creators: name: Canadian Pacific Railway Company
Publisher: name: The University of British Columbia
Year: 2016

description: A register recording incoming and outgoing C.P.R. railroad cars at the Canadian Pacific Railway depot in Vancouver. Entries for outward billing, local inward revising and wharf revising provide the date, initials for foreign company cars, car numbers and other information with numbers perhaps indicating engine number and car position.
A Survey on Reinforcement Learning Methods in Character Animation
Creators: name: Kwiatkowski, Ariel
name: Alvarado, Eduardo
name: Kalogeiton, Vicky
name: Liu, C. Karen
name: Pettré, Julien
name: van de Panne, Michiel
name: Cani, Marie-Paule
Publisher: name: arXiv
Year: 2022
Subjects: subject: Graphics (cs.GR)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Reinforcement Learning is an area of Machine Learning focused on how agents can be trained to make sequential decisions, and achieve a particular goal within an arbitrary environment. While learning, they repeatedly take actions based on their observation of the environment, and receive appropriate rewards which define the objective. This experience is then used to progressively improve the policy controlling the agent's behavior, typically represented by a neural network. This trained module can then be reused for similar problems, which makes this approach promising for the animation of autonomous, yet reactive characters in simulators, video games or virtual reality environments. This paper surveys the modern Deep Reinforcement Learning methods and discusses their possible applications in Character Animation, from skeletal control of a single, physically-based character to navigation controllers for individual agents and virtual crowds. It also describes the practical side of training DRL systems, comparing the different frameworks available to build such agents.
description: 27 pages, 6 figures, Eurographics STAR, Computer Graphics Forum
2024 Verasight National AAPOR Omnibus Survey
Creators: name: Reality Check Insights
Publisher: name: Roper Center for Public Opinion Research
Year: 2024

description: Groundhog Day (1); connections with family/friends (2); most recent museum visit (1); discovery of extraterrestrial life (1); disaster preparedness (1); meaning of “naturally flavored” (1); dental cavities (1); X (formerly Twitter) character limit (1); online security (1); communication with people abroad about events in their country (1); U.S. official language(s) (1); antisemitism (1); sustainable future (1); diversity, equity, and inclusion (DEI) (2); scientific/biological racism (1); unemployment (1); police officers (1); accessing credit (1); healthcare costs (1); prohibiting non-Americans from purchasing residential property (1); 2024 presidential election (1); perception of LGBTQ+ identification in democrats (1); celebrity endorsements of political candidates (1); marketing efficacy (1); public opinion surveys (9); polyamory (1); percent of monthly income spent on housing (1); moral superiority/inferiority (1); favorite music genre (1); gaming consoles (1); naming your car (1) ; pizza toppings (1)
From dawn till disk: Milky Way's turbulent youth revealed by the APOGEE+Gaia data
Creators: name: Belokurov, Vasily
name: Kravtsov, Andrey
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We use accurate estimates of aluminium abundance provided as part of the APOGEE Data Release 17 and Gaia Early Data Release 3 astrometry to select a highly pure sample of stars with metallicity $-1.5\lesssim {\rm [Fe/H]}\lesssim 0.5$ born in-situ in the Milky Way proper. We show that the low-metallicity ([Fe/H]$\lesssim -1.3$) in-situ component that we dub Aurora is kinematically hot with an approximately isotropic velocity ellipsoid and a modest net rotation. Aurora stars exhibit large scatter in metallicity and in a number of element abundance ratios. The median tangential velocity of the in-situ stars increases sharply with increasing metallicity between [Fe/H]$=-1.3$ and $-0.9$, the transition that we call the spin-up. The observed and theoretically expected age-metallicity correlations imply that this increase reflects a rapid formation of the Milky Way disk over $\approx 1-2$ Gyrs. The transformation of the stellar kinematics as a function of [Fe/H] is accompanied by a qualitative change in chemical abundances: the scatter drops sharply once the Galaxy builds up a disk during later epochs corresponding to [Fe/H]$>-0.9$. Results of galaxy formation models presented in this and other recent studies strongly indicate that the trends observed in the Milky Way reflect generic processes during the early evolution of progenitors of MW-sized galaxies: a period of chaotic pre-disk evolution, when gas is accreted along cold narrow filaments and when stars are born in irregular configurations, and subsequent rapid disk formation. The latter signals formation of a stable hot gaseous halo around the MW progenitor, which changes the mode of gas accretion and allows development of coherently rotating disk.
description: Comments are welcome!
title:  THERMAL ALTERATION OF THE MINERALOGY OF CALCIUM SULFOALUMINATE CEMENTS
title: IMPLICATIONS FOR THE PERFORMANCE OF RAPID REPAIR MATERIALS
titleType: Subtitle
Creators: name: Cavellier, Jillian
Publisher: name: University of Kentucky Libraries
Year: 2024
Subjects: classificationCode: 1.5
subject: FOS: Earth and related environmental sciences

description: Calcium sulfoaluminate (CSA) was developed in part to lessen the environmental impact of cementitious materials compared to traditional Portland cements. CSA was first put into production in the 1970s and has been undergoing various performance testing to investigate its durability. Yet to be evaluated is CSA’s response to a rapid, high temperature event. In this study, X-ray diffraction, thermogravimetric analysis, Fourier transform infrared spectrometry and scanning electron microscope imaging were used to analyze alterations in the mineralogy due to such an event. As found in previous studies, after ~125°C, ettringite has been completely dehydrated. Ettringite decomposes into bassanite and calcium carbonate while free aluminum likely bonded to hydroxides to form Al(OH)3. As temperature increased, bassanite continued to dehydrate into anhydrite. No alteration was present in samples of belite or ferrite. The decomposition of ettringite had a negative effect on the overall compressive strength of CSA cement. Due to severe alteration, CSA cement structures that have endured a rapid, high temperature event would need to be repaired or replaced.
description: © 2024 Jillian Cavellier
Benchmark Planes for Higgs-to-Higgs Decays in the NMSSM
Creators: name: Ellwanger, Ulrich
name: Hugonie, Cyril
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We present benchmark planes (or lines) with cross sections via gluon fusion for the processes $H\to h+H_{S}$, resonant Higgs pair and triple Higgs production, $A \to h+(A_S \to γγ)$, $A \to Z+ h$ and $A \to Z+ H_{S}$ within the Next-to-Minimal Supersymmetric Standard Model. Moreover we propose new searches for $H\to h+(H_{S} \to t\bar{t})$, $A \to Z+ (H_{S}\to h+h)$ and $A \to Z+ (H_{S}\to t\bar{t})$ for which possible cross sections are given. These allow the experimental collaborations to verify in the future which search channels cover yet unexplored regions of the parameter space. Expressions for the dominant contributions to trilinear Higgs couplings and Higgs--Z couplings are discussed which allow to identify the dominant processes contributing to a given final state.
description: 24 pages, 5 partially lengthy tables, 3 Figures, to appear in EPJC
Evaluation of the three-flavor quark-disconnected contribution to the muon anomalous magnetic moment from experimental data
Creators: name: Boito, Diogo
name: Golterman, Maarten
name: Maltman, Kim
name: Peris, Santi
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We point out that the sum of the strange-quark-connected and full, three-flavor quark-disconnected contributions to the leading-order hadronic vacuum polarization contribution, $a_μ^{\mathrm{LO,HVP}}$, to the anomalous magnetic moment of the muon, is a physical observable, and provide a data-based determination of this quantity in the isospin limit. The result, $40.1(1.5)\times 10^{-10}$, or $38.7(2.0)\times 10^{-10}$, depending on which data compilation is used, serves as a target of comparison for lattice calculations of the same isospin-limit combination. Subtracting from this result the average of lattice determinations of the strange-quark-connected contribution, one obtains also an alternate determination of the isospin-limit three-flavor disconnected contribution to $a_μ^{\mathrm{LO,HVP}}$. The result of this determination, $-13.3(1.5)\times 10^{-10}$, or $-14.6(2.0)\times 10^{-10}$, depending on which data compilation is used, agrees well and is competitive with the most precise current lattice determination.
description: 32 pages, 1 figure
CP Rail wharf revising station car record
Creators: name: Canadian Pacific Railway Company
Publisher: name: The University of British Columbia
Year: 2016

description: A register recording incoming and outgoing C.P.R. railroad cars at the Canadian Pacific Railway depot in Vancouver. Entries for outward billing, local inward revising and wharf revising provide the date, initials for foreign company cars, car numbers and other information with numbers perhaps indicating engine number and car position.
CP Rail local inward revising station car record
Creators: name: Canadian Pacific Railway Company
Publisher: name: The University of British Columbia
Year: 2016

description: A register recording incoming and outgoing C.P.R. railroad cars at the Canadian Pacific Railway depot in Vancouver. Entries for outward billing, local inward revising and wharf revising provide the date, initials for foreign company cars, car numbers and other information with numbers perhaps indicating engine number and car position.
A comparative study of non-deep learning, deep learning, and ensemble learning methods for sunspot number prediction
Creators: name: Dang, Yuchen
name: Chen, Ziqi
name: Li, Heng
name: Shu, Hai
Publisher: name: arXiv
Year: 2022
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Artificial Intelligence (cs.AI)
subject: Machine Learning (cs.LG)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Solar activity has significant impacts on human activities and health. One most commonly used measure of solar activity is the sunspot number. This paper compares three important non-deep learning models, four popular deep learning models, and their five ensemble models in forecasting sunspot numbers. In particular, we propose an ensemble model called XGBoost-DL, which uses XGBoost as a two-level nonlinear ensemble method to combine the deep learning models. Our XGBoost-DL achieves the best forecasting performance (RMSE = 25.70 and MAE = 19.82) in the comparison, outperforming the best non-deep learning model SARIMA (RMSE = 54.11 and MAE = 45.51), the best deep learning model Informer (RMSE = 29.90 and MAE = 22.35) and the NASA's forecast (RMSE = 48.38 and MAE = 38.45). Our XGBoost-DL forecasts a peak sunspot number of 133.47 in May 2025 for Solar Cycle 25 and 164.62 in November 2035 for Solar Cycle 26, similar to but later than the NASA's at 137.7 in October 2024 and 161.2 in December 2034. An open-source Python package of our XGBoost-DL for the sunspot number prediction is available at https://github.com/yd1008/ts_ensemble_sunspot.