cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Observability of Evaporating Lava Worlds
Creators: name: Zilinskas, Mantas
name: van Buchem, Christiaan
name: Miguel, Yamila
name: Louca, Amy
name: Lupu, Roxana
name: Zieba, Sebastian
name: van Westrenen, Wim
Publisher: name: arXiv
Year: 2022
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Lava worlds belong to a class of short orbital period planets reaching dayside temperatures high enough to melt their silicate crust. Theory predicts that the resulting lava oceans outgas their volatile components, attaining equilibrium with the overlying vapour. This creates a tenuous, silicate-rich atmosphere that may be confined to the permanent dayside of the planet. The launch of JWST will provide the much needed sensitivity and spectral coverage to characterise these worlds. In this paper, we assess the observability of characterisable spectral features by self-consistently modelling silicate atmospheres for all the currently confirmed targets having sufficient substellar temperatures (> 1500 K). To achieve this we use outgassed equilibrium chemistry and radiative transfer methods to compute temperature-pressure profiles, atmospheric chemical compositions and emission spectra. We explore varying melt compositions, free of highly-volatile elements, accounting for possible atmospheric evolution. Our models include a large number of neutral and ionic species, as well as all up-to-date opacities. The results indicate that SiO and SiO2 infrared features are the best, unique identifiers of silicate atmospheres, detectable using MIRI instrument of JWST. Detection of these two species in emission would allow for strong constraints on atmospheric thermal structure and possibly the composition of the melt. We also propose that certain species, e.g., TiO, may be directly tied to different classes of melts, possibly revealing surface and interior dynamics. Currently, there are nearly a dozen confirmed lava planets ideal for characterisation of silicate atmospheres using JWST, with two of these already accepted for the initial General Observers program.
description: Accepted for publication in A&A Preprint: https://doi.org/10.1051/0004-6361/202142984
New-physics signatures via $C\!P$ violation in $η^{(\prime)}\toπ^0μ^+μ^-$ and $η^\prime\toημ^+μ^-$ decays
Creators: name: Escribano, Rafel
name: Royo, Emilio
name: Sanchez-Puertas, Pablo
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: In this work we investigate the prospect of observing new-physics signatures via $C\!P$ violation in $η^{(\prime)}\toπ^0μ^+μ^-$ and $η^\prime\toημ^+μ^-$ decays at the REDTOP experiment. We make use of the SMEFT to parametrise the new-physics $C\!P$-violating effects and find that the projected REDTOP statistics are not competitive with respect to nEDM experiments. This reasserts the $η\toμ^+μ^-$ process as the most promising channel to find $C\!P$-violation at this experimental facility.
description: 12 pages, 1 figure, 1 table; v2 includes a comment about the neutron EDM constraint and possible accidental Wilson coefficient cancellations
Control of systems by parallel actuators
Creators: name: Montgomery-Smith, Stephen
Publisher: name: arXiv
Year: 2022
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics
subject: 70Q05

description: We describe a particular control method for a system controlled by several actuators with the same control constants. We show under certain assumptions that the control constants for the whole system can be obtained immediately from the control constants for a single actuator. This greatly simplifies the work in finding the control constants. Also, no gain scheduling is required. The authors have been unable to find any prior work in this direction, and so believe this is a rather new approach.
Dust diffusion in SPH simulations of an isolated galaxy
Creators: name: Romano, Leonard E. C.
name: Nagamine, Kentaro
name: Hirashita, Hiroyuki
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We compute the evolution of the grain size distribution (GSD) in a suite of numerical simulations of an isolated Milky-Way-like galaxy using the $N$-body/smoothed-particle-hydrodynamics code {\sc Gadget-4}. The full GSD is sampled on a logarithmically spaced grid with 30 bins, and its evolution is calculated self-consistently with the hydrodynamical and chemical evolution of the galaxy using a state-of-the-art star formation and feedback model. In previous versions of this model, the GSD tended to be slightly biased towards larger grains and the extinction curve had a tendency to be flatter than the observations. This work addresses these issues by considering the diffusion of dust and metals through turbulence on subgrid scales and introducing a multi-phase subgrid model that enables a smoother transition from diffuse to dense gas. We show that diffusion can significantly enhance the production of small grains and improve the agreement with the observed dust extinction curve in the Milky Way.
description: Accepted for publication in MNRAS. 20 pages, 23 figures
The co-evolution of molecular hydrogen and the grain size distribution in an isolated galaxy
Creators: name: Romano, Leonard E. C.
name: Nagamine, Kentaro
name: Hirashita, Hiroyuki
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Understanding the evolution of dust and molecular hydrogen (H$_2$) is a critical aspect of galaxy evolution, as they affect star formation and the spectral energy distribution of galaxies. We use the $N$-body/smoothed-particle-hydrodynamics code {\sc Gadget-4} to compute the evolution of dust and H$_2$ in a suite of numerical simulations of an isolated Milky-Way-like galaxy. The evolution of the full grain size distribution (GSD) is solved by sampling the grain size on a logarithmically spaced grid with 30 bins. The evolution of a primordial chemistry network with twelve species is solved consistently with the hydrodynamic evolution of the system, including star formation, metal and energy ejections from stars into the interstellar medium through supernova feedback and stellar winds. The formation model for H$_2$ considers the GSD and photo-dissociation through the UV radiation of young stars. We identify the processes needed for producing a sizeable amount of H$_2$, verify that the resulting star formation law in the later stages of galaxy evolution is consistent with observations of local spirals, and show that our model manages to produce a galactic molecular gas fraction in line with observations of Milky-Way-like galaxies. We stress the importance of the co-evolution of the GSD and H$_2$, as models assuming a fixed MRN shape for the GSD overestimate the production of H$_2$ in regimes where the dust abundance is dominated by large grains and underestimate it in the regime where the dust is dominated by small grains, both of which are realized in simulations of dust evolution.
description: Accepted for publication in MNRAS. 16 pages, 13 figures
Canadian Pacific Railway timetables
Creators: name: Canadian Pacific Railway Company
Publisher: name: The University of British Columbia
Year: 2017

description: Pamphlet-form timetables for passenger trains produced by the Canadian Pacific Railway Company for 26 Apr. 1970, 25 Oct. 1970 (two copies), 25 Apr. 1971, 30 Apr. 1972 (two copies), 26 Oct. 1969 - 25 Apr. 1970, 28 Apr. - 26 Oct. 1972, and 28 Apr. - 26 Oct. 1974. File also includes smaller timetables for the CP Rail between Victoria, Nanaimo and Courtenay, effective 25 Apr. 1971 and the second timetable effective 25 Oct. 1970. These timetables also include timetables for ship service between Vancouver-Nanaimo, Victoria-Seattle and Victoria-Port Angeles.
Comparison of the charge-crystal and charge-glass state in geometrically frustrated organic conductors studied by fluctuation spectroscopy
Creators: name: Thomas, Tatjana
name: Thyzel, Tim
name: Sun, Hungwei
name: Hashimoto, Kenichiro
name: Sasaki, Takahiko
name: Yamamoto, Hiroshi M.
name: Müller, Jens
Publisher: name: arXiv
Year: 2022
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We present a systematic investigation of the low-frequency charge carrier dynamics in different charge states of the organic conductors $θ$-(BEDT-TTF)$_2$$M$Zn(SCN)$_4$ with $M$=Rb,Tl, which result from quenching or relaxing the charge degrees of freedom on a geometrically frustrated triangular lattice. Due to strong electronic correlations these materials exhibit a charge-ordering transition, which can be kinetically avoided by rapid cooling resulting in a so-called charge-glass state without long-range order. The combination of fluctuation spectroscopy and a heat pulse method allows us to study and compare the resistance fluctuations in the low-resistive quenched and the high-resistive charge-ordered state, revealing striking differences in the respective noise magnitudes. For both compounds, we find strongly enhanced resistance fluctuations right at the metal-insulator transition and a broad noise maximum in the slowly cooled charge-crystal state with partly dominating two-level processes revealing characteristic activation energies.
Intermediate- and high-velocity clouds in the Milky Way II: evidence for a Galactic fountain with collimated outflows and diffuse inflows
Creators: name: Marasco, A.
name: Fraternali, F.
name: Lehner, N.
name: Howk, J. C.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We model the kinematics of the high- and intermediate- velocity clouds (HVCs and IVCs) observed in absorption towards a sample of 55 Galactic halo stars with accurate distance measurements. We employ a simple model of a thick disc whose main free parameters are the gas azimuthal, radial and vertical velocities ($v_ϕ$, $v_{\rm R}$ and $v_{\rm z}$), and apply it to the data by fully accounting for the distribution of the observed features in the distance-velocity space. We find that at least two separate components are required to reproduce the data. A scenario where the HVCs and the IVCs are treated as distinct populations provides only a partial description of the data, which suggests that a pure velocity-based separation may give a biased vision of the gas physics at the Milky Way's disc-halo interface. Instead, the data are best described by a combination of an inflow and an outflow components, both characterised by rotation with $v_ϕ$ comparable to that of the disc and $v_{\rm z}$ of 50-100 km/s. Features associated with the inflow appear to be diffused across the sky, while those associated with the outflow are mostly confined within a bi-cone pointing towards ($l\!=\!220^{\circ}$, $b\!=\!+40^{\circ}$) and ($l\!=\!40^{\circ}$, $b\!=\!-40^{\circ}$). Our findings indicate that the lower ($|z|\!\lesssim\!10$ kpc) Galactic halo is populated by a mixture of diffuse inflowing gas and collimated outflowing material, which are likely manifestations of a galaxy-wide gas cycle triggered by stellar feedback, that is, the galactic fountain.
description: Paper II. 13 pages, 4 figures, submitted to MNRAS. Comments are welcome
Supplementary document for Machine-Learning-Assisted Omnidirectional Bending Sensor Based on Cascaded Asymmetric Dual Core PCF Sensor - 6466966.pdf
Creators: name: Huang, Bingsen
name: sheng, xinzhi
name: cao, jiaqi
name: Jia, Haoqiang
name: gao, wei
name: gu, shuai
name: Wang, Xin
name: Chu, Paul
name: lou, shuqin
Publisher: name: Optica Publishing Group
Year: 2025
Subjects: Uncategorized

description: supplement
The molecular gas resolved by ALMA in the low-metallicity dwarf merging galaxy Haro 11
Creators: name: Gao, Yulong
name: Gu, Qiusheng
name: Shi, Yong
name: Zhou, Luwenjia
name: Bao, Min
name: Yu, Xiaoling
name: Zhang, Zhiyu
name: Wang, Tao
name: Madden, Suzanne C.
name: Hayes, Matthew
name: Lu, Shiying
name: Xu, Ke
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The physical mechanisms for starburst or quenching in less massive ($M_* < 10^{10} M_{\odot}$) galaxies are unclear. The merger is one of the inescapable processes referred to as both starburst and quenching in massive galaxies. However, the effects of the merger on star formation in dwarf galaxies and their evolution results are still uncertain. We aim to explore how to trigger and quench star formation in dwarf galaxies by studying the metal-poor gas-rich dwarf mergers based on the multi-band observations at a spatial resolution of $\sim$ 460 pc. We use the archival data of ALMA (band 3, 8) and VLT/MUSE to map CO($J=$1-0), [CI]($^3$P$_1 - ^3$P$_0$), and H$α$ emission in one of the most extreme starburst merging dwarf galaxies, Haro 11. We find the molecular gas is assembled around the central two star-forming regions. The molecular/ionized gas and stellar components show complex kinematics, indicating that the gas is probably at a combined stage of collision of clouds and feedback from star formation. The peak location and distribution of [CI](1-0) strongly resemble the CO(1-0) emission, meaning that it might trace the same molecular gas as CO in such a dwarf merger starburst galaxy. The enhancement of line ratios ($\sim 0.5$) of [CI]/CO around knot C is probably generated by the dissociation of CO molecules by cosmic rays and far-ultraviolet photons. Globally, Haro 11 and its star-forming regions share similar SFEs as the high-$z$ starburst galaxies or the clumps in nearby (U)LIRGs. Given the high SFE, sSFR, small stellar mass, low metallicity, and deficient HI gas, Haro 11 could be an analog of high-$z$ dwarf starburst and the potential progenitor of the nearby less massive elliptical galaxies. The significantly smaller turbulent pressure and viral parameter will probably trigger the intense starbursts. We also predict that it will quench at $M_* < 8.5 \times 10^9 M_{\odot}$.
description: 14 pages, 10 figures; accepted for publication in A&A
Enas Sadiq Hamudi, Estudio analítico de las peculiaridades lingüísticas según el género humano
Creators: name: Sadiq Hamudi, Enas
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 470507
subject: Comparative and transnational literature
classificationCode: 470514
subject: Literary theory
classificationCode: 470520
subject: Literature in Spanish and Portuguese

description: Enas Sadiq Hamudi, Estudio analítico de las peculiaridades lingüísticas según el género humano
Generalization of the Landau-Lifshitz-Gilbert equation by multi-body contributions to Gilbert damping for non-collinear magnets
Creators: name: Brinker, Sascha
name: Dias, Manuel dos Santos
name: Lounis, Samir
Publisher: name: arXiv
Year: 2022
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We propose a systematic and sequential expansion of the Landau-Lifshitz-Gilbert equation utilizing the dependence of the Gilbert damping tensor on the angle between magnetic moments, which arises from multi-body scattering processes. The tensor consists of a damping-like term and a correction to the gyromagnetic ratio. Based on electronic structure theory, both terms are shown to depend on e.g. the scalar, anisotropic, vector-chiral and scalar-chiral products of magnetic moments: $\vec{e}_i\cdot\vec{e}_j$, $(\vec{n}_{ij}\cdot\vec{e}_i)(\vec{n}_{ij}\cdot\vec{e}_j)$, $\vec{n}_{ij}\cdot(\vec{e}_i\times\vec{e}_j)$, $(\vec{e}_i\cdot\vec{e}_j)^2$, $\vec{e}_i\cdot(\vec{e}_j\times\vec{e}_k)$..., where some terms are subjected to the spin-orbit field $\vec{n}_{ij}$ in first and second order. We explore the magnitude of the different contributions using both the Alexander-Anderson model and time-dependent density functional theory in magnetic adatoms and dimers deposited on Au(111) surface.
High-Throughput Screening Of Sofc Cathode Materials
Creators: name: Hornés, Aitor
name: Saranya, Aruppukotai Bhupathi
name: Morata, Alejandro
name: Tarancón, Albert
Publisher: name: Zenodo
Year: 2016
Subjects: High-throughput methodology
Combinatorial deposition
SOFC cathodes

description: Searching for new improvements in SOFC technology, i.e. increase of performance and/or decrease of degradation; here we propose the preparation of novel SOFC cathode formulations by Combinatorial Pulsed Laser Deposition (PLD) of LSM, LSC and LSF. By this methodology, a compositional map of the three parent compounds is obtained in one experiment. While the preparation by conventional methods would take a considerable amount of time delaying the progress, our work will take advantage of exceptional properties of PLD in terms of deposition velocity, controlled microstructure and stoichiometry transfer to fabricate a whole set of samples with multiple compositions simultaneously, reducing significantly the time spent in the preparation. Afterwards, evaluation of physicochemical and electrochemical properties of the generated samples will help to select an optimized composition for the proposed application.
Tuning quantum-classical correspondence of molecular systems in a cavity
Creators: name: Moiseyev, Nimrod
name: Sindelka, Milan
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We show that the correspondence between quantum and classical mechanics can be tuned by varying the coupling strength between the cavity modes and an atom or a molecule. In the acceleration gauge the cavity-matter system is represented by an effective Hamiltonian with a non-trivial coupling appearing in the potential, and a renormaized mass. Importantly, the acceleration-gauge coupling is non-monotonic with the strength cavity-matter interaction. As a result one obtain effective approximately decoupled field-matter dynamics for weak and strong interactions. In the weak coupling regime the effective mass is essentially the original mass. In contrast, the renormalized mass is increased as the interaction is increased. This results in acceleration gauge dynamics of atom/molecule with the original Hamiltonian and effective Planck's constant that is reduced when the interaction is increased. This approach might lead in particular to the possibility of studying the correspondence of "quantum-chaos" (quantum stochasticity) with classical chaos, as well as either enhancement or suppression of tunneling, by varying a controllable physical parameter. Physical realization of our findings is briefly discussed.
Uncovering the non-equilibrium stationary properties in sparse Boolean networks
Creators: name: Torrisi, Giuseppe
name: Kühn, Reimer
name: Annibale, Alessia
Publisher: name: arXiv
Year: 2022
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences
subject: 82C20, 82C26, 82C44

description: Dynamic processes of interacting units on a network are out of equilibrium in general. In the case of a directed tree, the dynamic cavity method provides an efficient tool that characterises the dynamic trajectory of the process for the linear threshold model. However, because of the computational complexity of the method, the analysis has been limited to systems where the largest number of neighbours is small. We devise an efficient implementation of the dynamic cavity method which substantially reduces the computational complexity of the method for systems with discrete couplings. Our approach opens up the possibility to investigate the dynamic properties of networks with fat-tailed degree distribution. We exploit this new implementation to study properties of the non-equilibrium steady-state. We extend the dynamical cavity approach to calculate the pairwise correlations induced by different motifs in the network. Our results suggest that just two basic motifs of the network are able to accurately describe the entire statistics of observed correlations. Finally, we investigate models defined on networks containing bi-directional interactions. We observe that the stationary state associated with networks with symmetric or anti-symmetric interactions is biased towards the active or inactive state respectively, even if independent interaction entries are drawn from a symmetric distribution. This phenomenon, which can be regarded as a form of spontaneous symmetry-breaking, is peculiar to systems formulated in terms of Boolean variables, as opposed to Ising spins.
Standing requisitions, shops and vessels, 1975
Creators: name: Canadian Pacific Railway. British Columbia Coast Steamship Service
Publisher: name: The University of British Columbia
Year: 2017

description: Memos received by H. J. Tumilty, Superintendent Engineer, from purchasing agents R. G. Birney and H. I. Williams regarding B.C.C.S.S. standing requisitions for diesel fuel oil and ship repairs and services in 1975.
Tailoring propagation of light via spin-orbit interactions in correlated disorder
Creators: name: Carlini, Federico
name: Cherroret, Nicolas
Publisher: name: arXiv
Year: 2022
Subjects: subject: Optics (physics.optics)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: Based on the fundamental interplay between spatial wavefronts and polarization degrees of freedom, spin-orbit interactions (SOI) of light constitute a novel tool for optical control at the nanoscale. While well described in simple geometries, SOI of light in disordered environments, where only a partial knowledge of the material's microscopy is available, remain largely unexplored. Here, we show that in transversally random media, the disorder correlation can be exploited to tailor a variety of trajectories for ballistic beams via SOI. In particular, we unveil the existence of an oscillating spin Hall effect, stemming from the deformation of the phase of the wavefront due to SOI. In combination with a weak measurement, this phenomenon can also be maximized by an optimal choice of the disorder correlation.
description: 5 pages, 4 figures
Forecasting project success in the construction industry using adaptive neuro-fuzzy inference system
Creators: name: Mavi, Neda Kiani
name: Brown, Kerry
name: Fulford, Richard
name: Goh, Mark
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Space Science
subject: Medicine
subject: Neuroscience
subject: Environmental Sciences not elsewhere classified
subject: Ecology
subject: FOS: Biological sciences
subject: Biological Sciences not elsewhere classified
subject: Information Systems not elsewhere classified
subject: Inorganic Chemistry
subject: FOS: Chemical sciences
subject: Science Policy

description: Project managers often find it a challenge to successfully manage construction projects. As a result, understanding, evaluating, and achieving project success are critical for sponsors to control projects. In practice, determining key success factors and criteria to assess the performance of construction projects and forecast the success of new projects is difficult. To address these concerns, our objective is to go beyond the efficiency-oriented project success criteria by considering both efficiency- and effectiveness-oriented measures to evaluate project success. This paper contributes to existing knowledge by identifying a holistic and multidimensional set of project success factors and criteria using a two-round Delphi technique. We developed a decision support system using the Adaptive Neuro-Fuzzy Inference System (ANFIS) to forecast the success of mid- and large-sized construction projects. We gathered data from 142 project managers in Australia and New Zealand to implement the developed ANFIS. We then validated the constructed ANFIS using the K-fold cross-validation procedure and a real case study of a large construction project in Western Australia. The forecasting accuracy measures R2=0.97461, MAPE = 2.57912%, MAE = 1.88425, RMSE = 2.3610, RRMSE = 0.03149, and PI = 0.01589 suggest that the developed ANFIS is a very good predictor of project success.
Accuracy of Restricted Boltzmann Machines for the one-dimensional $J_1-J_2$ Heisenberg model
Creators: name: Viteritti, Luciano Loris
name: Ferrari, Francesco
name: Becca, Federico
Publisher: name: arXiv
Year: 2022
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Neural networks have been recently proposed as variational wave functions for quantum many-body systems [G. Carleo and M. Troyer, Science 355, 602 (2017)]. In this work, we focus on a specific architecture, known as Restricted Boltzmann Machine (RBM), and analyse its accuracy for the spin-1/2 $J_1-J_2$ antiferromagnetic Heisenberg model in one spatial dimension. The ground state of this model has a non-trivial sign structure, especially for $J_2/J_1>0.5$, forcing us to work with complex-valued RBMs. Two variational Ansätze are discussed: one defined through a fully complex RBM, and one in which two different real-valued networks are used to approximate modulus and phase of the wave function. In both cases, translational invariance is imposed by considering linear combinations of RBMs, giving access also to the lowest-energy excitations at fixed momentum $k$. We perform a systematic study on small clusters to evaluate the accuracy of these wave functions in comparison to exact results, providing evidence for the supremacy of the fully complex RBM. Our calculations show that this kind of Ansätze is very flexible and describes both gapless and gapped ground states, also capturing the incommensurate spin-spin correlations and low-energy spectrum for $J_2/J_1>0.5$. The RBM results are also compared to the ones obtained with Gutzwiller-projected fermionic states, often employed to describe quantum spin models [F. Ferrari, A. Parola, S. Sorella and F. Becca, Phys. Rev. B 97, 235103 (2018)]. Contrary to the latter class of variational states, the fully-connected structure of RBMs hampers the transferability of the wave function from small to large clusters, implying an increase of the computational cost with the system size.
description: 21 pages, 12 figures, submitted to Scipost Physics
Clival chordoma - CT and MRI
Creators: name: Naval Baudin, Pablo
Publisher: name: EURORAD
Year: 2016
Subjects: subject: Head and neck
subject: CT
subject: MR
subject: MR-Diffusion/Perfusion
subject: Diagnostic procedure
subject: Neoplasia

description: Clinical History Image Findings Discussion Find Diagnosis Differential Diagnosis
description: female, 70 years
description: Clinical History: A 70-year-old woman attended her general practitioner complaining of binocular diplopia for the last 15 days. Relevant medical history includes only general cardiovascular risk-factors.Neurologic examination demonstrates binocular diplopia to ... Final Diagnosis: Clival chondroid chordoma
A new and homogeneous metallicity scale for Galactic classical Cepheids II. The abundance of iron and alpha elements
Creators: name: da Silva, R.
name: Crestani, J.
name: Bono, G.
name: Braga, V. F.
name: D'Orazi, V.
name: Lemasle, B.
name: Bergemann, M.
name: Dall'Ora, M.
name: Fiorentino, G.
name: François, P.
name: Groenewegen, M. A. T.
name: Inno, L.
name: Kovtyukh, V.
name: Kudritzki, R. -P.
name: Matsunaga, N.
name: Monelli, M.
name: Pietrinferni, A.
name: Porcelli, L.
name: Storm, J.
name: Tantalo, M.
name: Thévénin, F.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Classical Cepheids are the most popular distance indicators and tracers of young stellar populations. The key advantage is that they are bright and they can be easily identified in Local Group and Local Volume galaxies. Their evolutionary and pulsation properties depend on their chemical abundances. The main aim of this investigation is to perform a new and accurate abundance analysis of two tens of calibrating Galactic Cepheids using high spectral resolution (R$\sim$40,000-115,000) and high S/N spectra ($\sim$400) covering the entire pulsation cycle. We focus our attention on possible systematics affecting the estimate of atmospheric parameters and elemental abundances along the pulsation cycle. We cleaned the line list by using atomic transition parameters based on laboratory measurements and by removing lines that are either blended or display abundance variations along the pulsation cycle. The spectroscopic approach that we developed brings forward small dispersions in the variation of the atmospheric parameters ($σ$($T_{\rm eff}$)$\sim$50 K, $σ$($\log{g}$)$\sim$0.2 dex, and $σ$($ξ$)$\sim$0.2 km/s) and in the abundance of both iron ($\lesssim$ 0.05 dex) and alpha elements ($\lesssim$0.10 dex) over the entire pulsation cycle. We also provide new and accurate effective temperature templates by splitting the calibrating Cepheids into four different period bins, ranging from short to long periods. For each period bin, we performed an analytical fit with Fourier series providing $θ= 5040/{T_{\rm eff}}$ as a function of the pulsation phase. The current findings are a good viaticum to trace the chemical enrichment of the Galactic thin disk by using classical Cepheids and a fundamental stepping stone for further investigations into the more metal-poor regime typical of Magellanic Cepheids.
description: 31 pages, 23 figures (out of which 11 are in the appendices A and B), to be published in the Astronomy & Astrophysics journal
Bbmri-Eric Use Cases
Creators: name: Holub, Petr
name: Quinlan, Philip
name: DiezFraile, Araceli
name: Hummel, Michael
name: Kuhn, Klaus
name: Litton, Jan-Eric
name: Müller, Heimo
name: Swertz, Morris
name: Ückert, Frank
name: Valík, Dalibor
name: Vojtíšek, Ondřej
name: Zanetti, Gianluigi
Publisher: name: Zenodo
Year: 2016

description: This is a working document providing high-level overview of BBMRI-ERIC use cases.
Analysis of Farm Vehicle Crashes and Safety Belt Usage
Creators: name: Agent, Kenneth R.
name: Green, Eric R.
name: Fields, Michael A.
Publisher: name: Kentucky Transportation Center, University of Kentucky
Year: 2016
Subjects: Transportation Engineering

description: The use of safety belts and child safety seats has been shown to be an effective means of reducing injuries to motor vehicle occupants involved in traffic crashes. There have been various methods used in efforts to increase safety belt and safety seat usage. Past efforts have included public information campaigns, local followed by statewide legislation, and enforcement of the legislation.  The objectives of the study were to collect data and review related Kentucky data to determine the following information:      usage rate specifically for occupants of farm vehicles,     the number of registered farm vehicles and their percentage of all registered vehicles,     the number of crashes in which a farm vehicle was involved and their percentage of all crashes, and     the number of injuries and fatalities for occupants of farm vehicles and their percentage of all injuries and fatalities.
Analysis of Traffic Crash Data in Kentucky (2011-2015)
Creators: name: Green, Eric R.
name: Agent, Kenneth R.
name: Pigman, Jerry G.
name: Fields, Michael A.
Publisher: name: Kentucky Transportation Center, University of Kentucky
Year: 2016
Subjects: subject: Transportation Engineering

description: This report documents an analysis of traffic crash data in Kentucky for the years of 2011 through 2015. A primary objective of this study was to determine average crash statistics for Kentucky highways. Rates were calculated for various types of highways and for counties and cities. Difference criteria were used for exposure.
Quantum Off-Shell Recursion Relation
Creators: name: Lee, Kanghoon
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We construct off-shell recursion relations for arbitrary loop-level scattering amplitudes beyond the conventional tree-level recursion relations for $ϕ^{4}$-theory and the Yang-Mills theory. We define a quantum perturbiner expansion that includes loop corrections from the quantum effective action formalism by identifying the external source. Our method clearly shows how the perturbiner expansion becomes an off-shell current generating function. Instead of using the classical equations of motion in the conventional perturbiner method, we exploit the Dyson-Schwinger equation to derive the quantum off-shell recursion relation to arbitrary order of loop-level scattering amplitudes. We solve the recursion relation and reproduce the results which agree up to one-loop six-point scattering amplitudes for $ϕ^{4}$-theory. Furthermore, we construct the recursions for computing loop-level correlation functions by replacing the choice of the external source.
description: 33 pages, 4 figures; v2: typos fixed and references added, published version
Completeness of Bethe ansatz for Gaudin models associated with gl(1|1)
Creators: name: Lu, Kang
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mathematical Physics (math-ph)
subject: Quantum Algebra (math.QA)
subject: Representation Theory (math.RT)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We study the Gaudin models associated with $\mathfrak{gl}(1|1)$. We give an explicit description of the algebra of Hamiltonians (Gaudin Hamiltonians) acting on tensor products of polynomial evaluation $\mathfrak{gl}(1|1)[t]$-modules. It follows that there exists a bijection between common eigenvectors (up to proportionality) of the algebra of Hamiltonians and monic divisors of an explicit polynomial written in terms of the highest weights and evaluation parameters. In particular, our result implies that each common eigenspace of the algebra of Hamiltonians has dimension one. Therefore, we confirm Conjecture 8.3 from arXiv:1809.01279. We also give dimensions of the generalized eigenspaces. Moreover, we express the generating pseudo-differential operator of Gaudin transfer matrices associated to antisymmetrizers in terms of the quadratic Gaudin transfer matrix and the center of $\mathrm{U}(\mathfrak{gl}(1|1)[t])$.
description: LaTeX, 22 pages. This is a continuation of arXiv:1910.13360
Asymptotic safety guaranteed for strongly coupled gauge theories
Creators: name: Bond, Andrew D.
name: Litim, Daniel F.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We demonstrate that interacting ultraviolet fixed points in four dimensions exist at strong coupling, and away from large-$N$ Veneziano limits. This is established exemplarily for semi-simple supersymmetric gauge theories with chiral matter and superpotential interactions by using the renormalisation group and exact methods from supersymmetry. We determine the entire superconformal window of ultraviolet fixed points as a function of field multiplicities. Results are in accord with the $a$-theorem, bounds on conformal charges, Seiberg duality, and unitary. We also find manifolds of Leigh-Strassler models exhibiting lines of infrared fixed points. At weak coupling, findings are confirmed using perturbation theory up to three loop. Benchmark models with low field multiplicities are provided including examples with Standard~Model-like gauge sectors. Implications for particle physics, model building, and conformal field theory are indicated.
description: 17 pages, 7 figures
Transition from localized to mean field behaviour of cascading failures in the fiber bundle model on complex networks
Creators: name: Batool, Attia
name: Pal, Gergo
name: Danku, Zsuzsa
name: Kun, Ferenc
Publisher: name: arXiv
Year: 2022
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We study the failure process of fiber bundles on complex networks focusing on the effect of the degree of disorder of fibers' strength on the transition from localized to mean field behaviour. Starting from a regular square lattice we apply the Watts-Strogatz rewiring technique to introduce long range random connections in the load transmission network and analyze how the ultimate strength of the bundle and the statistics of the size of failure cascades change when the rewiring probability is gradually increased. Our calculations revealed that the degree of strength disorder of nodes of the network has a substantial effect on the localized to mean field transition. In particular, we show that the transition sets on at a finite value of the rewiring probability, which shifts to higher values as the degree of disorder is reduced. The transition is limited to a well defined range of disorder, so that there exists a threshold disorder of nodes' strength below which the randomization of the network structure does not provide any improvement neither of the overall load bearing capacity nor of the cascade tolerance of the system. At low strength disorder the fully random network is the most stable one, while at high disorder best cascade tolerance is obtained at a lower structural randomness. Based on the interplay of the network structure and strength disorder we construct an analytical argument which provides a reasonable description of the numerical findings.
description: 30 pages, 11 figures
Abundance And Vertical Distributions Of Zooplankton Along The East-West Gradient Of Phytoplankton Biomass In The North Water (Arctic Ocean)
Creators: name: Gonthier, Kevin
Publisher: name: Zenodo
Year: 2016
Subjects: Arctic Ocean
North Water Polynya
Copepods
Optical underwater imaging
Automatic Species identification
Lightframe On-sight Keyspecies Investigation) LOKI
Fine-scale vertical distribution

description: In the Arctic Ocean copepods transfer energy produced by autotrophs to higher trophic levels. Net tows have long been used as the main zooplankton sampling tool but can hardly indicate the abundance and distribution of these animals on a fine-scale level. The LOKI (Lightframe On-sight Keyspecies Investigation) is an in-situ optical underwater imaging device capable of recording the vertical distribution of zooplankton at a scale of ~30-60 cm. Using this device, the fine-scale distribution of the key herbivorous copepods Calanus glacialis and C. hyperboreus as well as that of the omnivore Metridia longa was analyzed. It was investigated how the fine-scale vertical distribution of copepods was coupled to fluorescence of microalgae during the phytoplankton bloom and how that pattern differed between eastern and western North Water Polynya. Eastern and western NOW showed substantial differences in the fluorescence of microalgae which seemed to influence the fine-scale copepod distribution. Whereas copepod abundance and fluorescence seemed almost vertically separated on the Canadian side of the polynya, the abundance of the same taxa showed a strong vertical coupling with fluorescence on the Greenland side. The results suggest a strong influence of physical parameters in the NOW (e.g. temperature and upwelling), likely governed by the West Greenland Current and Baffin Island Current, on microalgae and hence fine-scale zooplankton distribution.
UV counterpart of an X-ray ultra-fast outflow in IRAS 17020+4544
Creators: name: Mehdipour, Missagh
name: Kriss, Gerard A.
name: Krongold, Yair
name: Longinotti, Anna Lia
name: Costantini, Elisa
name: Gupta, Anjali
name: Mathur, Smita
name: Nicastro, Fabrizio
name: Panessa, Francesca
name: Som, Debopam
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We report on the discovery of a UV absorption counterpart of a low-ionization X-ray ultra-fast outflow (UFO) in the Narrow-Line Seyfert-1 galaxy IRAS 17020+4544. This UV signature of the UFO is seen as a narrow and blueshifted Lyman-alpha absorption feature in the far-UV spectrum, taken with the Cosmic Origins Spectrograph (COS) on the Hubble Space Telescope (HST). The Lyman-alpha feature is found to be outflowing with a velocity of -23430 km/s (0.078 c). We carry out high-resolution UV spectroscopy and photoionization modeling to study the UFO that is seen in the HTS/COS spectrum. The results of our modeling show that the UV UFO corresponds to a low-ionization, low-velocity component of the X-ray UFO found previously with XMM-Newton's Reflection Grating Spectrometer (RGS). The other higher-velocity and higher-ionization components of the X-ray UFOs are not significantly detected in the HST/COS spectrum, consistent with predictions of our photoionization calculations. The multiple ionization and velocity components of the UFOs in IRAS 17020+4544 suggest a scenario where a powerful primary UFO entrains and shocks the ambient medium, resulting in formation of weaker secondary UFO components, such as the one found in the UV band.
description: Accepted for publication in The Astrophysical Journal (ApJ), 13 pages, 5 figures
Historian of Science and Technology
Creators: name: Yatskuliak, Orest
Publisher: name: Zenodo
Year: 2025

description: The article explores the ontological nature of time within a multivector universe, examining how human consciousness acts not only as an agent embedded in time but as an architect capable of shaping temporal trajectories. By comparing classical (linear and cyclical) models of temporality with a multidimensional approach, the study proposes a vision of time as a field of possibilities co-created by human choice and perception. It addresses transformations in the understanding of free will and historical subjectivity within nonlinear temporal structures, integrating philosophical, cultural, and scientific perspectives to propose a novel methodology for rethinking history in an age of global transformations.
Technology integration, beliefs, and pedagogical practices in the social studies: a phenomenological case study of teacher-initiated, one-to-one technology in middle school social studies
Creators: name: Heath, Marie K.
Publisher: name: Maryland Shared Open Access Repository
Year: 2016

description: (Ed. D.) -- Towson University, 2016
description: In the United States, social studies education plays a critical role in preparing students to be active citizens in a democracy. Student centered, inquiry-based instruction helps foster learner agency, but it occurs infrequently in social studies classrooms. One-to-one (1:1) technology, in which every learner uses a personal computing device, has been suggested as a tool to facilitate shifts in social studies pedagogy. Despite this potential, little research exists which examines one-to-one technology in social studies. The purpose of this study was to explore the experiences of two social studies teachers who initiated and integrated one-to-one technology over a two-year period in a racially diverse, high-poverty middle school. Using a phenomenological methodology, data were collected through interviews, observations, and artifacts and were interpreted using transcendental phenomenological reduction. The theory of Technological, Pedagogical, and Content Knowledge (TPACK) (Koehler & Mishra, 2005) framed discussion of findings. Findings reveal themes of teachers’ positive beliefs about technology, teachers’ belief in themselves as professionals with agency, teachers’ relationship with the larger school district, and the ways in which teacher empowerment, technological knowledge, and pedagogical shifts led to greater student autonomy in learning. The study contributes to the foundation for one-to-one research in social studies by concluding: meaningful integration of one-to-one in social studies occurs at a confluence of complex factors; positive teacher beliefs  about technology and teacher beliefs about professional agency impact integration; teacher voice is critical to research; and a modified version of TPACK is necessary in order to more fully capture the complex relationship between teacher beliefs and the teacher’s interaction with administration and district goals. The study recommends that policymakers and practitioners should empower teachers by: building teacher capacity and supporting development of positive teacher beliefs well in advance of technology initiatives; designing and providing professional development that honors teacher voice, existing beliefs, and offers opportunities to take risks with technology; limiting the levels of bureaucracy in districts; and facilitating greater trust between the school leaders and teachers within the school community.
description: http://library.towson.edu/cdm/ref/collection/etd/id/50036
On Acceleration in Three Dimensions
Creators: name: Arenas-Henriquez, Gabriel
name: Gregory, Ruth
name: Scoins, Andrew
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We go "back to basics", studying accelerating systems in $2+1$ AdS gravity \textit{ab initio}. We find three classes of geometry, which we interpret by studying holographically their physical parameters. From these, we construct stationary, accelerating point particles; one-parameter extensions of the BTZ family resembling an accelerating black hole; and find new solutions including a novel accelerating "BTZ geometry" not continuously connected to the BTZ black hole as well as some black funnel solutions.
description: 51 pages, 27 figures. v2: Discussion and references added, minor typos corrected, accepted for publication in JHEP
Nonlinear Regression Models with Iterative Methods
Creators: name: Chernega, A., & Lynch, F
Publisher: name: Zenodo
Year: 2020

description: Provided regression parameters are coefficients of transformations of the dependent variables, nearly any function can be fit with the typical least-squares multiple regression process. However, an entirely different approach is necessary to fit a nonlinear function where the regression parameters are themselves within the transformations. Drawing heavily from numerical analysis, we can develop numerical solutions to satisfy these restrictions. This thesis will step beyond linear regression and develop the Newton-Raphson method for approximating solutions to nonlinear systems as the application we hope to apply it to will almost always have no analytic solution. Once developed, the ability to solve a system of nonlinear systems of equations allows us to attack the problem of minimizing the sum of squared errors of a nonlinear regression model.
Gravitational quasinormal modes for Lifshitz black branes
Creators: name: Andrade, Tomas
name: Pantelidou, Christiana
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We study the scalar and vector channels of gravitational quasinormal modes for Lifshitz black branes emerging in Einstein-Maxwell-Dilaton and Einstein-Proca theories in four and five dimensions, finding significant differences between the two models. In particular, rather surprisingly, in the Einstein-Maxwell-Dilaton model the dispersion relations for the shear and sound modes are given by $ω_{shear} \sim -i\,k^4$ and $ω_{sound}\sim-i \,k^2$, while in the Einstein-Proca model they take the more conventional form $ω_{shear} \sim -i\,k^2$ and $ω_{sound}\sim k$, the proportionality constants depend on the dynamical exponent and the appropriate factors of temperature. Through the holographic duality, this calculation provides information about the relaxation of the momentum and energy flux operators in a putative dual Lifshitz field theory. Comparing with the dispersion relations obtained directly by considering Lifshitz hydrodynamics suggest that the mass density of the equilibrium state in the Einstein-Maxwell-Dilaton model is infinite.
description: 19 pages, 6 figures; v2: references added