cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Electronic_Supplementary_Material from Multivariate analysis of biologging data reveals the environmental determinants of diving behaviour in a marine reptile
Creators: name: Hounslow, Jenna L.
name: Fossette, Sabrina
name: Byrnes, Evan E.
name: Whiting, Scott D.
name: Lambourne, Renae N.
name: Armstrong, Nicola J.
name: Tucker, Anton D.
name: Richardson, Anthony R.
name: Gleiss, Adrian C.
Publisher: name: The Royal Society
Year: 2022
Subjects: subject: Ecology
subject: FOS: Biological sciences
subject: 60801 Animal Behaviour

description: Additional methods and results accompanying main article.
Citizen Science and the UN SDGs. Case Study: Open Urban Sustainability Hubs Project (OPUSH)
Creators: name: Guba, Beate
Publisher: name: Zenodo
Year: 2023
Subjects: UN Sustainable development goals
citizen science
knowledge hubs
data visualisation

description: This presentation highlights the Open Urban Sustainability Hubs project within the UN Sustainable Development Goals. It was part of the CESAER Annual Meetings 2023, where the Citizen Science Subgroup of the Task Force Openness of Science & Technology organised a workshop about the concept of citizen science and its practical implementation at universities.
Resolution-Adaptive Hybrid MIMO Architectures for Millimeter Wave Communications
Creators: name: Choi, Jinseok
name: Evans, Brian L.
name: Gatherer, Alan
Publisher: name: arXiv
Year: 2017
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: In this paper, we propose a hybrid analog-digital beamforming architecture with resolution-adaptive ADCs for millimeter wave (mmWave) receivers with large antenna arrays. We adopt array response vectors for the analog combiners and derive ADC bit-allocation (BA) solutions in closed form. The BA solutions reveal that the optimal number of ADC bits is logarithmically proportional to the RF chain's signal-to-noise ratio raised to the 1/3 power. Using the solutions, two proposed BA algorithms minimize the mean square quantization error of received analog signals under a total ADC power constraint. Contributions of this paper include 1) ADC bit-allocation algorithms to improve communication performance of a hybrid MIMO receiver, 2) approximation of the capacity with the BA algorithm as a function of channels, and 3) a worst-case analysis of the ergodic rate of the proposed MIMO receiver that quantifies system tradeoffs and serves as the lower bound. Simulation results demonstrate that the BA algorithms outperform a fixed-ADC approach in both spectral and energy efficiency, and validate the capacity and ergodic rate formula. For a power constraint equivalent to that of fixed 4-bit ADCs, the revised BA algorithm makes the quantization error negligible while achieving 22% better energy efficiency. Having negligible quantization error allows existing state-of-the-art digital beamformers to be readily applied to the proposed system.
description: Accepted to IEEE Transactions on Signal Processing
Discovery of extraordinary X-ray emission from magnetospheric interaction in the unique binary stellar system $ε$ Lupi
Creators: name: Das, B.
name: Petit, V.
name: Nazé, Y.
name: Corcoran, M. F.
name: Cohen, D. H.
name: Biswas, A.
name: Chandra, P.
name: David-Uraz, A.
name: Leutenegger, M. A.
name: Neiner, C.
name: Pablo, H.
name: Paunzen, E.
name: Shultz, M. E.
name: ud-Doula, A.
name: Wade, G. A.
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We report detailed X-ray observations of the unique binary system $ε$ Lupi, the only known short-period binary consisting of two magnetic early-type stars. The components have comparably strong, but anti-aligned magnetic fields. The orbital and magnetic properties of the system imply that the magnetospheres overlap at all orbital phases, suggesting the possibility of variable inter-star magnetospheric interaction due to the non-negligible eccentricity of the orbit. To investigate this effect, we observed the X-ray emission from $ε$ Lupi both near and away from periastron passage, using the Neutron Star Interior Composition Explorer mission (NICER) X-ray Telescope. We find that the system produces excess X-ray emission at the periastron phase, suggesting the presence of variable inter-star magnetospheric interaction. We also discover that the enhancement at periastron is confined to a very narrow orbital phase range ($\approx 5\%$ of the orbital period), but the X-ray properties close to periastron phase are similar to those observed away from periastron. From these observations, we infer that the underlying cause is magnetic reconnection heating the stellar wind plasma, rather than shocks produced by wind-wind collision. Finally, by comparing the behavior of $ε$ Lupi with that observed for cooler magnetic binary systems, we propose that elevated X-ray flux at periastron phase is likely a general characteristic of interacting magnetospheres irrespective of the spectral types of the constituent stars.
description: Accepted for publication in MNRAS (20 pages, 17 figures)
Effect of latent space distribution on the segmentation of images with multiple annotations
Creators: name: Bhat, Ishaan
name: Pluim, Josien P. W.
name: Viergever, Max A.
name: Kuijf, Hugo J.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: Image and Video Processing (eess.IV)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: We propose the Generalized Probabilistic U-Net, which extends the Probabilistic U-Net by allowing more general forms of the Gaussian distribution as the latent space distribution that can better approximate the uncertainty in the reference segmentations. We study the effect the choice of latent space distribution has on capturing the variation in the reference segmentations for lung tumors and white matter hyperintensities in the brain. We show that the choice of distribution affects the sample diversity of the predictions and their overlap with respect to the reference segmentations. We have made our implementation available at https://github.com/ishaanb92/GeneralizedProbabilisticUNet
description: Accepted for publication at the Journal of Machine Learning for Biomedical Imaging (MELBA) https://melba-journal.org/2023:005. arXiv admin note: text overlap with arXiv:2207.12872
Higgs Scalaron Mixed Inflation
Creators: name: Ema, Yohei
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We discuss the inflationary dynamics of a system with a non-minimal coupling between the Higgs and the Ricci scalar as well as a Ricci scalar squared term. There are two scalar modes in this system, i.e. the Higgs and the spin-zero mode of the graviton, or the scalaron. We study the two-field dynamics of the Higgs and the scalaron during inflation, and clarify the condition where inflation is dominated by the Higgs/scalaron. We also find that the cut-off scale at around the vacuum is as large as the Planck scale, and hence there is no unitarity issue, although there is a constraint on the couplings from the perturbativity of the theory at around the vacuum.
description: 10 pages, 4 figures; v2: references added, typos corrected, terminology changed; v3: appendices added, version accepted in PLB
title: Assessment of summer 2018-2019 sea-ice forecasts for the Southern Ocean
Creators: name: Massonnet, F
name: Reid, P
name: Lieser, JL
name: Bitz, CM
name: Fyfe, J
name: Hobbs, WR
Publisher: name: Antarctic Climate & Ecosystems Cooperative Research Centre (ACE CRC)
Year: 2019

description: We warmly thank all 12 contributors to this second exercise of coordinated forecasts of sea ice in the Southern Ocean. The great enthusiasm for SIPN is much appreciated and we are looking forward to continuing our activities. Indeed, more hindcasts are necessary to ensure the robustness of the results. Still, this analysis has already revealed several elements.
Scattering mechanisms of highest-mobility InAs/Al$_{x}$Ga$_{1-x}$Sb quantum wells
Creators: name: Tschirky, T.
name: Mueller, S.
name: Lehner, Ch. A.
name: Fält, S.
name: Ihn, T.
name: Ensslin, K.
name: Wegscheider, W.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We study molecular beam epitaxially grown, undoped Al$_{x}$Ga$_{1-x}$Sb/InAs/AlSb quantum wells with different buffer and barrier designs and varying quantum well width. The highest mobilities were achieved with Al$_{0.33}$Ga$_{0.67}$Sb buffers and lower barriers and a quantum well width of 24 nm. These quasi-single-interface InAs/AlSb quantum well devices reached a gate-tuned mobility of 2.4$~\times~10^{6}~$cm$^2$/Vs at a density of 1$\times 10^{12}$ cm$^{-2}$ and 1.3 K. In Hall bar devices boundary scattering is found to strongly influence the mobility determination in this mobility regime. Ionized background impurity scattering at low electron densities, device boundary scattering at intermediate electron densities, and intersubband scattering at high electron densities were identified as most likely dominant scattering processes. Ringlike structures in the Landau fan can be explained using a single-particle model of crossing Landau levels.
description: 9 pages, 11 figures, 3 tables
Infinite powers and Cohen reals
Creators: name: Medini, Andrea
name: van Mill, Jan
name: Zdomskyy, Lyubomyr
Publisher: name: arXiv
Year: 2017
Subjects: subject: General Topology (math.GN)
subject: Logic (math.LO)
subject: FOS: Mathematics
subject: 54B10, 54G20, 03E35

description: We give a consistent example of a zero-dimensional separable metrizable space $Z$ such that every homeomorphism of $Z^ω$ acts like a permutation of the coordinates almost everywhere. Furthermore, this permutation varies continuously. This shows that a result of Dow and Pearl is sharp, and gives some insight into an open problem of Terada. Our example $Z$ is simply the set of $ω_1$ Cohen reals, viewed as a subspace of $2^ω$.
description: 9 pages
Detection of monothioformic acid towards the solar-type protostar IRAS 16293-2422
Creators: name: Manna, Arijit
name: Pal, Sabyasachi
Publisher: name: arXiv
Year: 2023
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: In the interstellar medium (ISM), the complex organic molecules that contain the thiol group ($-$SH) play an important role in the polymerization of amino acids. We look for SH-bearing molecules in the chemically rich solar-type protostar IRAS 16293-2422. After the extensive spectral analysis using the local thermodynamic equilibrium (LTE) model, we have detected the rotational emission lines of trans-isomer monothioformic acid (t-HC(O)SH) towards the IRAS 16293 B using the Atacama Large Millimeter/Submillimeter Array (ALMA). We did not observe any evidence of cis-isomer monothioformic acid (c-HC(O)SH) towards the IRAS 16293 B. The column density of t-HC(O)SH towards the IRAS 16293 B was (1.02$\pm$0.6)$\times$10$^{15}$ cm$^{-2}$ with an excitation temperature of 125$\pm$15 K. The fractional abundance of t-HC(O)SH with respect to H$_{2}$ towards the IRAS 16293 B is 8.50$\times$10$^{-11}$. The column density ratio of t-HC(O)SH/CH$_{3}$SH towards the IRAS 16293 B is 0.185. We compare our estimated abundance of t-HC(O)SH towards the IRAS 16293 B with the abundance of t-HC(O)SH towards the galactic center quiescent cloud G+0.693-0.027 and hot molecular core G31.41+0.31. After the comparison, we found that the abundance of t-HC(O)SH towards the IRAS 16293 B is several times of magnitude lower than G+0.693-0.027 and G31.41+0.31. We also discuss the possible formation mechanism of t-HC(O)SH in the ISM.
description: Accepted for publication in Journal of Astrophysics and Astronomy
Hybrid Active-Passive IRS Assisted Energy-Efficient Wireless Communication
Creators: name: Peng, Qiaoyan
name: Wu, Qingqing
name: Chen, Guangji
name: Liu, Ruiqi
name: Ma, Shaodan
name: Chen, Wen
Publisher: name: arXiv
Year: 2023
Subjects: subject: Information Theory (cs.IT)
subject: Signal Processing (eess.SP)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Deploying active reflecting elements at the intelligent reflecting surface (IRS) increases signal amplification capability but incurs higher power consumption. Therefore, it remains a challenging and open problem to determine the optimal number of active/passive elements for maximizing energy efficiency (EE). To answer this question, we consider a hybrid active-passive IRS (H-IRS) assisted wireless communication system, where the H-IRS consists of both active and passive reflecting elements.Specifically, we study the optimization of the number of active/passive elements at the H-IRS to maximize EE. To this end, we first derive the closed-form expression for a near-optimal solution under the line-of-sight (LoS) channel case and obtain its optimal solution under the Rayleigh fading channel case. Then, an efficient algorithm is employed to obtain a high-quality sub-optimal solution for the EE maximization under the general Rician channel case. Simulation results demonstrate the effectiveness of the H-IRS for maximizing EE under different Rician factors and IRS locations.
Rational Solutions of the Painlevé-II Equation Revisited
Creators: name: Miller, Peter D.
name: Sheng, Yue
Publisher: name: arXiv
Year: 2017
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: Mathematical Physics (math-ph)
subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: The rational solutions of the Painlevé-II equation appear in several applications and are known to have many remarkable algebraic and analytic properties. They also have several different representations, useful in different ways for establishing these properties. In particular, Riemann-Hilbert representations have proven to be useful for extracting the asymptotic behavior of the rational solutions in the limit of large degree (equivalently the large-parameter limit). We review the elementary properties of the rational Painlevé-II functions, and then we describe three different Riemann-Hilbert representations of them that have appeared in the literature: a representation by means of the isomonodromy theory of the Flaschka-Newell Lax pair, a second representation by means of the isomonodromy theory of the Jimbo-Miwa Lax pair, and a third representation found by Bertola and Bothner related to pseudo-orthogonal polynomials. We prove that the Flaschka-Newell and Bertola-Bothner Riemann-Hilbert representations of the rational Painlevé-II functions are explicitly connected to each other. Finally, we review recent results describing the asymptotic behavior of the rational Painlevé-II functions obtained from these Riemann-Hilbert representations by means of the steepest descent method.
Experimental observation of the role of countercations on the electrical conductance of Preyssler-type polyoxometalate nanodevices
Creators: name: Huez, Cécile
name: Renaudineau, Séverine
name: Volatron, Florence
name: Proust, Anna
name: Vuillaume, Dominique
Publisher: name: arXiv
Year: 2023
Subjects: subject: Applied Physics (physics.app-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Polyoxometalates are nanoscale molecular oxides with promising properties that are currently explored for molecule-based memory devices. In this work, we synthesize a series of Preyssler polyoxometalates (POMs), (Na-P5W30O110)14-,stabilized with four different counterions, H+, K+, NH4+ and tetrabutylammonium (TBA+), and we study the electron transport properties at the nanoscale (conductive atomic force microscopy, C-AFM) of molecular junctions formed by self-assembled monolayers (SAMs) of POMs electrostatically deposited on ultraflat gold surface prefunctionalized with a positively charged SAM of amine-terminated alkylthiol chains. We report that the electron transport properties of P5W30-based molecular junctions depend on the nature of the counterions, the low-bias current (in the voltage range -0.6 V to 0.6 V) gradually increasing by a factor ca. 100 by changing the counterion in the order K+, NH4+, H+ and TBA+. From a statistical study (hundreds of current-voltage traces) using a simple analytical model for charge transport in nanoscale devices, we show that the energy position of the lowest unoccupied molecular orbital (LUMO) of the P5W30 with respect of the Fermi energy of the electrodes increases from ca. 0.4 eV to 0.7 eV and that that electrode coupling energy also increases from ca. 0.05 to 1 meV in the same order from K+, NH4+, H+ to TBA+. We discuss several hypotheses on the possible origin of these features, such as a counterion-dependent dipole at the POM/electrode interface and counterion-modulated molecule/electrode hybridization, with, in both cases, the largest effect in the case of TBA+ counterions.
description: Preprint: full text, figures and supporting information
Appendix to the pondscape leaflets (PONDERFUL DEMO-sites)
Creators: name: Oertli, Beat
name: Bartrons, Mireia
name: Blicharska, Malgorzata
name: Boissezon, Aurélie
name: Lago, Manuel
name: Nicolet, Pascale
name: Robin, Joël
name: Sordet, Adrienne
name: Rasmussen, Marzenna
name: Ryfisch, Simon Otis
Publisher: name: Zenodo
Year: 2024

description: In the framework of the project PONDERFUL, a synthetic “leaflet” has been developed for each of thepondscapes making part of DEMO-sites implemented across Europe, Turkey and Uruguay. The mainobjective of the leaflets is to present a selection of science-based success stories in the implementationof pondscapes as Nature-based Solutions (NbS) for addressing societal challenges (such as climatechange and biodiversity loss), and to promote the transferability of these practices elsewhere. Thesuccess stories are evidenced in this leaflet by the measurement of indicators of the NatureContribution to People, and by a cost-benefit analysis.

The leaflets were written and designed to interest and inspire professionals in land use planning andmanagement of natural areas, people active in NGOs, and also for a wider and more varied public.

The information provided in the leaflet is intentionally simplified to avoid excessive jargon andscientific complexity and to remain accessible and understandable to a broad audience.

This appendix explains the vocabulary and gives some guidance on the different headings.
SOFTWARE-INTENSIVE SOLUTIONS ON DIGITAL BUSINESS PERSPECTIVES
Creators: name: Ashik, Khalid Md
Publisher: name: figshare
Year: 2022
Subjects: subject: 150302 Business Information Systems
subject: FOS: Economics and business
subject: 80309 Software Engineering
subject: FOS: Computer and information sciences

description:   Software is an essential element of the digitalized business system. It transforms a business model to function in a digital way. This enables a comprehensive understanding of the connection between business models and software engineering. This paper focuses on digital business workflows and how some digital businesses use software to function their business processes. This paper analyzes how some business companies in Germany such as Gorillas, Flink appeared during the meantime COVID-19 pandemic situation and mobilized the online grocery delivery business with their services through the software applications similar to Chaldal.com (2013) in Bangladesh which was the pioneer and world’s first self-warehouse basis online pick order and deliver grocery delivery and a discussion of their business model. Due to digitalization, the services in businesses are provided remotely. In the modern world, digital business workflow is about how to structure and convenient the way the services can be provided to the customers or consumers. Nowadays most companies and organizations are realizing the advantages of the use of business software to conduct their services faster and in a broader way. In a short, the paper describes the advantages of business digitalization and the maintenance steps for an ideal digital business process service
An Oscillating Holographic Dark Energy in $f(R)$ Gravity
Creators: name: Shaikh, A. Y.
name: Tadas, D. P.
name: Katore, S. D.
Publisher: name: arXiv
Year: 2023
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In this article, we investigated a Locally Rotationally Symmetric (LRS) Bianchi-II cosmological model with matter and Holographic Dark Energy (HDE) in the context of $f(R)$ theory of gravity. In order to find exact solutions to the field equations, we assumed that the Shear scalar $(σ)$ is proportional to Expansion scalar $(θ)$. For HDE, it is observed that the Equation of state (EoS) parameter $ ω_Λ $ has an oscillating nature and lies in $[-0.778,\, 1.016].$ Also, we have studied the validity of energy conditions and shows that Null Energy Condition (NEC) is violated near the bouncing points. Moreover, we analysed the physical and geometrical aspects of the investigated model. Keywords: Holographic dark energy, LRS Bianchi-II, $f(R)$ gravity.
description: 14 Pages, 10 Figures
Eccentric Gravitational Wave Bursts in the Post-Newtonian Formalism
Creators: name: Loutrel, Nicolas
name: Yunes, Nicolas
Publisher: name: arXiv
Year: 2017
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The detection of GW150914 by ground based gravitational wave observatories has brought about a new era in astrophysics. At optimal sensitivity, these observatories are expected to detect several events each year, with one or two of these occurring with non-negligible eccentricity. Such eccentric binaries will emit bursts of gravitational radiation during every pericenter passage, where orbital velocities can reach greater than ten percent the speed of light. As a result, such binaries may prove to be powerful probes of extreme gravitational physics and astrophysics. A promising method of achieving detection of such binaries is through power stacking, where the power in each burst is added up in time-frequency space. This detection strategy requires a theoretical prior of where the bursts will occur in time and frequency so that one knows where to search for successive bursts. We here present a generic post-Newtonian formalism for constructing such time-frequency model priors at generic post-Newtonian order. We apply our formalism to generate a burst model at third post-Newtonian order, making it potentially the most accurate, fully analytic model to date.
description: 46 pages, 3 figures
The energetic particle environment of a GJ 436 b-like planet
Creators: name: Rodgers-Lee, D.
name: Rimmer, P. B.
name: Vidotto, A. A.
name: Louca, A. J.
name: Taylor, Andrew
name: Mesquita, A. L.
name: Miguel, Y.
name: Venot, O.
name: Helling, C.
name: Barth, P.
name: Lacy, E.
Publisher: name: Deutsches Elektronen-Synchrotron, DESY, Hamburg
Year: 2023
Subjects: subject: 520

description: A key first step to constrain the impact of energetic particles in exoplanet atmospheres is to detect the chemical signature of ionisation due to stellar energetic particles and Galactic cosmic rays. We focus on GJ$\,$436, a well-studied M dwarf with a warm Neptune-like exoplanet. We demonstrate how the maximum stellar energetic particle momentum can be estimated from the stellar X-ray luminosity. We model energetic particle transport through the atmosphere of a hypothetical exoplanet at orbital distances between $a=0.01-0.2\,$au from GJ$\,$436, including GJ$\,$436$\,$b's orbital distance (0.028$\,$au). For these distances we find that, at top-of-atmosphere, stellar energetic particles ionise molecular hydrogen at a rate of $\zeta_{\rm StEP,H_2} \sim 4\times10^{-10}-2\times10^{-13}\,\mathrm{s^{-1}}$. In comparison, Galactic cosmic rays alone lead to $\zeta_{\rm GCR, H_2}\sim2\times 10^{-20}-10^{-18} \,\mathrm{s^{-1}}$. At 10au we find that ionisation due to Galactic cosmic rays equals that of stellar energetic particles: $\zeta_{\rm GCR,H_2} = \zeta_{\rm StEP,H_2} \sim 7\times10^{-18}\,\rm{s^{-1}}$ for the top-of-atmosphere ionisation rate. At GJ$\,$436$\,$b's orbital distance, the maximum ion-pair production rate due to stellar energetic particles occurs at pressure $P\sim 10^{-3}\,$bar while Galactic cosmic rays dominate for $P>10^2\,$bar. These high pressures are similar to what is expected for a post-impact early Earth atmosphere. The results presented here will be used to quantify the chemical signatures of energetic particles in warm Neptune-like atmospheres.
Faithfulness Tests for Natural Language Explanations
Creators: name: Atanasova, Pepa
name: Camburu, Oana-Maria
name: Lioma, Christina
name: Lukasiewicz, Thomas
name: Simonsen, Jakob Grue
name: Augenstein, Isabelle
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computation and Language (cs.CL)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences
subject: I.2.7
subject: 68T50

description: Explanations of neural models aim to reveal a model's decision-making process for its predictions. However, recent work shows that current methods giving explanations such as saliency maps or counterfactuals can be misleading, as they are prone to present reasons that are unfaithful to the model's inner workings. This work explores the challenging question of evaluating the faithfulness of natural language explanations (NLEs). To this end, we present two tests. First, we propose a counterfactual input editor for inserting reasons that lead to counterfactual predictions but are not reflected by the NLEs. Second, we reconstruct inputs from the reasons stated in the generated NLEs and check how often they lead to the same predictions. Our tests can evaluate emerging NLE models, proving a fundamental tool in the development of faithful NLEs.
description: Short paper, ACL 2023
The nuclear properties and extended morphologies of powerful radio galaxies: the roles of host galaxy and environment
Creators: name: Miraghaei, H.
name: Best, P. N.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Powerful radio galaxies exist as either compact or extended sources, with the extended sources traditionally classified by their radio morphologies as Fanaroff--Riley (FR) type I and II sources. FRI/II and compact radio galaxies have also been classified by their optical spectra into two different types: high excitation (HERG; quasar-mode) and low excitation (LERG; jet-mode). We present a catalogue of visual morphologies for a complete sample of $>$1000 1.4-GHz-selected extended radio sources from the Sloan Digital Sky Survey. We study the environment and host galaxy properties of FRI/II and compact sources, classified into HERG/LERG types, in order to separate and distinguish the factors that drive the radio morphological variations from those responsible for the spectral properties. Comparing FRI LERGs with FRII LERGs at fixed stellar mass and radio luminosity, we show that FRIs typically reside in richer environments and are hosted by smaller galaxies with higher mass surface density; this is consistent with extrinsic effects of jet disruption driving the FR dichotomy. Using matched samples of HERGs and LERGs, we show that HERG host galaxies are more frequently star-forming, with more evidence for disk-like structure than LERGs, in accordance with currently-favoured models of fundamentally different fuelling mechanisms. Comparing FRI/II LERGs with compact LERGs, we find the primary difference is that compact objects typically harbour less massive black holes. This suggests that lower-mass black holes may be less efficient at launching stable radio jets, or do so for shorter times. Finally, we investigate rarer sub-classes: wide-angle tail, head-tail, FR-hybrid and double-double sources.
description: MNRAS, Vol. 466, pp. 4346-4363, 2017, supplementary data has been added
Aquilombar, Verbo Intransitivo: Experimentações Dialogadas entre Clóvis Moura e Beatriz Nascimento em Aquilombagem Crítica
Creators: name: Barboza Da Silva, Rosimeire
name: Santos, Gersiney
Publisher: name: Confluenze.  Rivista di Studi Iberoamericani
Year: 2022

description: No texto, propomos uma experimentação epistemológica dialogada entre a concepção de quilombagem (Clóvis Moura) e de quilombo (Beatriz Nascimento), a partir da Aquilombagem Crítica (AC). Mesmo partindo de perspectivas e quadros teóricos aparentemente distintos, ambas as figuras intelectuais identificam um processo transformacional inegociável de condições materiais e simbólicas, o qual propulsiona politicamente a narrativa negra de forma estratégica. A AC, desse modo, apresenta-se como uma reconfiguração ontológica voltada à experiência negra, na qual aquilombar se equipara a reexistir.
description: Confluenze. Rivista di Studi Iberoamericani, Vol. 14 No. 2 (2022): Escapes of/from the queer in Ibero-America: aesthetics, narratives, political imagination of sex-gender dissidence
One-Loop Evolution of Twist-2 Generalised Parton Distributions
Creators: name: Bertone, Valerio
name: del Castillo, Rafael F.
name: Echevarria, Miguel G.
name: del Río, Óscar
name: Rodini, Simone
Publisher: name: Deutsches Elektronen-Synchrotron, DESY, Hamburg
Year: 2023
Subjects: parton: distribution function
strong interaction: coupling constant
gluon: operator
higher-order: 0
generalized parton distribution
DGLAP equation
quark
conservation law
numerical calculations
strong coupling

description: We revisit the evolution of generalised parton distributions (GPDs) at the leading order in the strong coupling constant $\alpha_s$ for all of the twist-2 quark and gluon operators. We rederive the relevant one-loop evolution kernels, expressing them in a form suitable for implementation, and check analytically that some basic properties, such as DGLAP/ERBL limits and polynomiality conservation, are fulfilled. We also present a number of numerical results obtained with a public implementation of the evolution in the library ${\tt APFEL++}$ and available within the ${\tt PARTONS}$ framework.
Shift of Symmetries of Naive Fermions in QCD-like Lattice Theories
Creators: name: Kieburg, Mario
name: Würfel, Tim R.
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We study the global symmetries of naive lattices Dirac operators in QCD-like theories in any dimension larger than two. In particular we investigate how the chosen number of lattice sites in each direction affects the global symmetries of the Dirac operator. These symmetries are important since they do not only determine the infra-red spectrum of the Dirac operator but also the symmetry breaking pattern and, thus, the lightest pseudo-scalar mesons. We perform the symmetry analysis and discuss the possible zero modes and the degree of degeneracy of the lattice Dirac operators. Moreover we explicitly identify a "reduced" lattice Dirac operator which is the naive Dirac operator apart from the degeneracy. We verify our predictions by comparing Monte Carlo simulations of QCD-like theories in the strong coupling limit with the corresponding random matrix theories.
description: 15 pages, 12 plots in 2 figures; PACS numbers: 12.38.Gc, 05.50.+q, 02.10.Yn, 11.15.Ha
Interactive Multi-Instrument Database of Solar Flares
Creators: name: Sadykov, Viacheslav M
name: Kosovichev, Alexander G
name: Oria, Vincent
name: Nita, Gelu M
Publisher: name: arXiv
Year: 2017
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Solar flares are complicated physical phenomena that are observable in a broad range of the electromagnetic spectrum, from radiowaves to $γ$-rays. For a more comprehensive understanding of flares, it is necessary to perform a combined multi-wavelength analysis using observations from many satellites and ground-based observatories. For efficient data search, integration of different flare lists and representation of observational data, we have developed an Interactive Multi-Instrument Database of Solar Flares (https://solarflare.njit.edu/). The web accessible database is fully functional and allows the user to search for uniquely-identified flare events based on their physical descriptors and availability of observations by a particular set of instruments. Currently, the data from three primary flare lists (GOES, RHESSI and HEK) and a variety of other event catalogs (Hinode, Fermi GBM, Konus-Wind, OVSA flare catalogs, CACTus CME catalog, Filament eruption catalog) and observing logs (IRIS and Nobeyama coverage) are integrated, and an additional set of physical descriptors (temperature and emission measure) is provided along with an observing summary, data links, and multi-wavelength light curves for each flare event since January, 2002. We envision that this new tool will allow researchers to significantly speed up the search of events of interest for statistical and case studies.
description: 28 pages, 3 figures, 2 tables
Causal Effect Estimation from Observational and Interventional Data Through Matrix Weighted Linear Estimators
Creators: name: Kladny, Klaus-Rudolf
name: von Kügelgen, Julius
name: Schölkopf, Bernhard
name: Muehlebach, Michael
Publisher: name: arXiv
Year: 2023
Subjects: subject: Methodology (stat.ME)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: We study causal effect estimation from a mixture of observational and interventional data in a confounded linear regression model with multivariate treatments. We show that the statistical efficiency in terms of expected squared error can be improved by combining estimators arising from both the observational and interventional setting. To this end, we derive methods based on matrix weighted linear estimators and prove that our methods are asymptotically unbiased in the infinite sample limit. This is an important improvement compared to the pooled estimator using the union of interventional and observational data, for which the bias only vanishes if the ratio of observational to interventional data tends to zero. Studies on synthetic data confirm our theoretical findings. In settings where confounding is substantial and the ratio of observational to interventional data is large, our estimators outperform a Stein-type estimator and various other baselines.
Ser juntos en el territorio vivido. Caminar, trepar, nadar, andar con los niños y niñas de Puerto Viejo, Misiones
Creators: name: Rodríguez Celín, María Lucila
Publisher: name: Confluenze. Rivista di Studi Iberoamericani
Year: 2022

description: En este trabajo reflexiono acerca de la importancia de la sociabilidad y la circulación en el territorio por parte de las infancias en relación con ciertos aprendizajes vinculados al desarrollo progresivo de habilidades, destrezas y saberes necesarios para la futura producción y reproducción social y la construcción de identificaciones sociales. Para ello me centraré en el análisis de las prácticas cotidianas de un grupo de niños y niñas mbya y criollos en Misiones, Argentina. Contemplaré la cuestión étnica y profundizaré en la apropiación de la división entre parientes y no parientes que ocurre en los primeros años de vida.
description: Confluenze. Rivista di Studi Iberoamericani, Vol. 14 No. 2 (2022): Escapes of/from the queer in Ibero-America: aesthetics, narratives, political imagination of sex-gender dissidence
D2-D8 system with massive strings and the Lifshitz spacetimes
Creators: name: Singh, Harvendra
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The Romans type IIA supergravity allows fundamental strings to have explicit mass term at the tree level. We show that there exists a (F1,D2,D8) brane configuration which gives rise to $Lif_4^{(2)}\times {R}^1\times S^5$ vacua supported by the massive strings. The presence of D8-branes naturally excites massive fundamental strings. A compactification on circle relates these Lifshitz massive type-IIA background with the axion-flux $Lif_4^{(2)}\times {S}^1\times S^5$ vacua in ordinary type-IIB theory. The massive T-duality in eight dimensions further relates them to yet another $\widetilde{Lif}_4^{(2)}\times S^1\times S^5$ vacua constituted by (F1,D0,D6) system in ordinary type IIA theory. The latter vacua after compactification to four dimensions generate two `distinct' electric charges and a constant magnetic field, all living over 2-dimensional plane. This somewhat reminds us of a similar set up in quantum Hall systems.
description: 19 pages; minor changes
A Signal Temporal Logic Planner for Ergonomic Human-Robot Collaboration
Creators: name: Silano, Giuseppe
name: Afifi, Amr
name: Saska, Martin
name: Franchi, Antonio
Publisher: name: arXiv
Year: 2023
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: This paper proposes a method for designing human-robot collaboration tasks and generating corresponding trajectories. The method uses high-level specifications, expressed as a Signal Temporal Logic (STL) formula, to automatically synthesize task assignments and trajectories. To illustrate the approach, we focus on a specific task: a multi-rotor aerial vehicle performing object handovers in a power line setting. The motion planner considers limitations, such as payload capacity and recharging constraints, while ensuring that the trajectories are feasible. Additionally, the method enables users to specify robot behaviors that take into account human comfort (e.g., ergonomics, preferences) while using high-level goals and constraints. The approach is validated through numerical analyzes in MATLAB and realistic Gazebo simulations using a mock-up scenario.
description: 8 pages, 7 figures, accepted for presentation to the 2023 International Conference on Unmanned Aircraft Systems (ICUAS) at Lazarski University, Warsaw, Poland
Collaborative Optimization of Multi-microgrids System with Shared Energy Storage Based on Multi-agent Stochastic Game and Reinforcement Learning
Creators: name: Wang, Yijian
name: Cui, Yang
name: Li, Yang
name: Xu, Yang
Publisher: name: arXiv
Year: 2023
Subjects: subject: Systems and Control (eess.SY)
subject: Machine Learning (cs.LG)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: Achieving the economical and stable operation of Multi-microgrids (MMG) systems is vital. However, there are still some challenging problems to be solved. Firstly, from the perspective of stable operation, it is necessary to minimize the energy fluctuation of the main grid. Secondly, the characteristics of energy conversion equipment need to be considered. Finally, privacy protection while reducing the operating cost of an MMG system is crucial. To address these challenges, a Data-driven strategy for MMG systems with Shared Energy Storage (SES) is proposed. The Mixed-Attention is applied to fit the conditions of the equipment, additionally, Multi-Agent Soft Actor-Critic(MA-SAC) and (Multi-Agent Win or Learn Fast Policy Hill-Climbing)MA-WoLF-PHC are proposed to solve the partially observable dynamic stochastic game problem. By testing the operation data of the MMG system in Northwest China, following conclusions are drawn: the R-Square (R2) values of results reach 0.999, indicating the neural network effectively models the nonlinear conditions. The proposed MMG system framework can reduce energy fluctuations in the main grid by 1746.5kW in 24 hours and achieve a cost reduction of 16.21% in the test. Finally, the superiority of the proposed algorithms is verified through their fast convergence speed and excellent optimization performance.
description: Accepted by Energy
Edge Devices Inference Performance Comparison
Creators: name: Tobiasz, R.
name: Wilczyński, G.
name: Graszka, P.
name: Czechowski, N.
name: Łuczak, S.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Machine Learning (cs.LG)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences
subject: I.2.10; B.8.0

description: In this work, we investigate the inference time of the MobileNet family, EfficientNet V1 and V2 family, VGG models, Resnet family, and InceptionV3 on four edge platforms. Specifically NVIDIA Jetson Nano, Intel Neural Stick, Google Coral USB Dongle, and Google Coral PCIe. Our main contribution is a thorough analysis of the aforementioned models in multiple settings, especially as a function of input size, the presence of the classification head, its size, and the scale of the model. Since throughout the industry, those architectures are mainly utilized as feature extractors we put our main focus on analyzing them as such. We show that Google platforms offer the fastest average inference time, especially for newer models like MobileNet or EfficientNet family, while Intel Neural Stick is the most universal accelerator allowing to run most architectures. These results should provide guidance for engineers in the early stages of AI edge systems development. All of them are accessible at https://bulletprove.com/research/edge_inference_results.csv
An eccentric companion at the edge of the brown dwarf desert orbiting the 2.4 Msun giant star HIP67537
Creators: name: Jones, M. I.
name: Brahm, R.
name: Wittenmyer, R. A.
name: Drass, H.
name: Jenkins, J. S.
name: Melo, C. H. F.
name: Vos, J.
name: Rojo, P.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We report the discovery of a substellar companion around the giant star HIP67537. Based on precision radial velocity measurements from CHIRON and FEROS high-resolution spectroscopic data, we derived the following orbital elements for HIP67537$\,b$: m$_b$sin$i$ = 11.1$^{+0.4}_{-1.1}$ M$_{\rm {\tiny jup}}$, $a$ = 4.9$^{+0.14}_{-0.13}$ AU and $e$ = 0.59$^{+0.05}_{-0.02}$. Considering random inclination angles, this object has $\gtrsim$ 65% probability to be above the theoretical deuterium-burning limit, thus it is one of the few known objects in the planet to brown-dwarf transition region. In addition, we analyzed the Hipparcos astrometric data of this star, from which we derived a minimum inclination angle for the companion of $\sim$ 2 deg. This value corresponds to an upper mass limit of $\sim$ 0.3 M$_\odot$, therefore the probability that HIP67537$\,b$ is stellar in nature is $\lesssim$ 7%. The large mass of the host star and the high orbital eccentricity makes HIP67537$\,b$ a very interesting and rare substellar object. This is the second candidate companion in the brown dwarf desert detected in the sample of intermediate-mass stars targeted by the EXPRESS radial velocity program, which corresponds to a detection fraction of $f$ = 1.6$^{+2.0}_{-0.5}$%. This value is larger than the fraction observed in solar-type stars, providing new observational evidence of an enhanced formation efficiency of massive substellar companions in massive disks. Finally, we speculate about different formation channels for this object.
description: Accepted for publication to A&A
Modulation vector of the Fulde-Ferrell-Larkin-Ovchinnikov state in CeCoIn5 revealed by high-resolution magnetostriction measurements
Creators: name: Kittaka, Shunichiro
name: Kono, Yohei
name: Tsunashima, Kaito
name: Kimoto, Daisuke
name: Yokoyama, Makoto
name: Shimizu, Yusei
name: Sakakibara, Toshiro
name: Yamashita, Minoru
name: Machida, Kazushige
Publisher: name: arXiv
Year: 2023
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) state is an exotic superconducting phase formed by Cooper pairs with finite center-of-mass momentum $q$. On theoretical grounds, the superconducting order parameter in the FFLO state is spatially modulated along the $q$ vector, and the emergence of an associated anisotropy is expected at the phase transition from the Abrikosov state to the FFLO state. Here, we report the results of high-resolution magnetostriction measurements for a single crystal of CeCoIn$_5$ around $B \parallel c$. We find two anomalies in the magnetostriction along the $c$ axis, parallel to the magnetic-field orientation. In sharp contrast, this $B_{\rm K}$ anomaly disappears in the magnetostriction along the $a$-axis direction, perpendicular to the magnetic-field orientation. To explain this uniaxial expansion, we suggest a possibility that the FFLO transition occurs slightly below the upper critical field, and the FFLO modulation vector parallel to the applied magnetic field gives rise to the anisotropic response.
description: 6 pages, 5 figures (main text) + 12 pages, 10 figures (Supplemental Material), accepted for publication in Phys. Rev. B
Class Specific Feature Selection for Interval Valued Data Through Interval K-Means Clustering
Creators: name: Guru, D. S.
name: Kumar, N. Vinay
Publisher: name: arXiv
Year: 2017
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences
subject: I.5.2; I.5.3
subject: 68T10

description: In this paper, a novel feature selection approach for supervised interval valued features is proposed. The proposed approach takes care of selecting the class specific features through interval K-Means clustering. The kernel of K-Means clustering algorithm is modified to adapt interval valued data. During training, a set of samples corresponding to a class is fed into the interval K-Means clustering algorithm, which clusters features into K distinct clusters. Hence, there are K number of features corresponding to each class. Subsequently, corresponding to each class, the cluster representatives are chosen. This procedure is repeated for all the samples of remaining classes. During testing the feature indices correspond to each class are used for validating the given dataset through classification using suitable symbolic classifiers. For experimentation, four standard supervised interval datasets are used. The results show the superiority of the proposed model when compared with the other existing state-of-the-art feature selection methods.
description: 12 Pages, 3 figures, 7 tables
Genetic algorithm-based control of birefringent filtering for self-tuning, self-pulsing fiber lasers
Creators: name: Woodward, R. I.
name: Kelleher, E. J. R.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Polarization-based filtering in fiber lasers is well-known to enable spectral tunability and a wide range of dynamical operating states. This effect is rarely exploited in practical systems, however, because optimization of cavity parameters is non-trivial and evolves due to environmental sensitivity. Here, we report a genetic algorithm-based approach, utilizing electronic control of the cavity transfer function, to autonomously achieve broad wavelength tuning and the generation of Q-switched pulses with variable repetition rate and duration. The practicalities and limitations of simultaneous spectral and temporal self-tuning from a simple fiber laser are discussed, paving the way to on-demand laser properties through algorithmic control and machine learning schemes.
description: Accepted for Optics Letters, 12th June 2017