cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
MPEC 2023-Q60 : 2002 EY
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2023
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Indirect Detection of Low-mass Dark Matter Through the $π^0$ and $η$ Windows
Creators: name: Christy, J. G.
name: Kumar, Jason
name: Rajaraman, Arvind
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We consider the search for gamma-rays produced by the annihilation or decay of low-mass dark matter which couples to quarks. In this scenario, most of the photons are produced from the decays of $π^0$ or $η$ mesons. These decays produce distinctly different photon signatures due to the difference in meson mass. We assess the ability of the future MeV-range observatories to constrain the hadronic final states produced by dark matter annihilation or decay from the shape of the resulting photon spectrum. We then comment on how this information can be used to determine properties of the dark matter coupling to the quark current, based on the approximate symmetries of low-energy QCD.
description: 13 pages, 5 figures, 1 table; updated to match version accepted by Physical Review D
Spin-polarized edge currents and Majorana fermions in one- and two-dimensional topological superconductors
Creators: name: Björnson, Kristofer
name: Pershoguba, Sergey. S.
name: Balatsky, Alexander. V.
name: Black-Schaffer, Annica M.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We investigate the persistent currents, spin-polarized local density of states, and spectral functions of topological superconductors constructed by placing ferromagnetic impurities on top of an s-wave superconductor with Rashba spin-orbit interaction. We solve self-consistently for the superconducting order parameter and investigate both two-dimensional blocks and one-dimensional wires of ferromagnetic impurities, with the magnetic moments pointing both perpendicular and parallel to the surface. We find that the topologically protected edge states of ferromagnetic blocks give rise to spin-polarized edge currents, but that the total persistent current flows in opposite direction to what is expected from the dispersion relation of the edge states. We also show that the Majorana fermions at the end points of one-dimensional wires are spin-polarized, which can be directly related to the spin-polarization of the edge currents of two-dimensional blocks. Connections are also made to the physics of the Yu-Shiba-Rusinov states for zero-dimensional impurities.
description: 11 pages + 9 pages appendix, 18 figures
Observational evaluative conditioning is sensitive to relational information
Creators: name: Kasran, Sarah
name: Hughes, Sean
name: De Houwer, Jan
Publisher: name: Open Science Framework
Year: 2022
Subjects: subject: Social and Behavioral Sciences
subject: Psychology
subject: FOS: Psychology

description: Time-stamped, non-editable version of the project, including all raw and processed data as well as R code used for processing and analysis.
Lindsaea leprieurii Hooker 1846
Creators: name: Rojas-Alvarado, Alexander Francisco
name: Tejero-Díez, José Daniel
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Polypodiopsida
Polypodiales
Lindsaeaceae
Lindsaea
Lindsaea leprieurii

description: Lindsaea leprieurii Hooker (1846: 208). Type:— FRENCH GUIANA. “ Guyana”, F. Leprieur s.n. (holotype: K!)
 Distribution:— Costa Rica (first record), Colombia, Venezuela, Guyana, French Guiana and Suriname.
 Specimens examined:— COSTA RICA. Puntarenas: Golfito, Parque Nacional Corcovado, Península de Osa, cerro Rincón, 08°31 ʹ 16,55 ʺ N, 83°28 ʹ 07,19 ʺ W, 700–800 m, 30 January 1998, A. Azofeifa 621 (CR!, MO!, USJ!); ibidem, 8°31 ʹ N, 83°28 ʹ W, 700–745 m, 29 January 1998, A. Rojas et al. 4204 (CR!, MO!) (mixed with L. lancea).
 Notes:— Lindsaea leprieurii is similar to L. falcata in having 1-pinnate blades with entire apical pinnae, but it differs in its blackish (vs. reddish-brown) stipes, dark green (vs. pale green to green) blades, and hastate apical pinnae (vs. deltate to deltate-lanceolate). similar habitat preferences. Lindsaea leprieurii also differs from Lindsaea lancea in having 1-pinnate blades (vs. commonly 2-pinnate), pinnules to 3 times as long as wide (ca. 2–2.5 times as long as wide), distal pinnae that are slightly or not reduced (vs. distal ones about 1/2 the size of the lower pinnae), and strongly asymmetric terminal pinnae (vs. symmetric).
description: Published as part of Rojas-Alvarado, Alexander Francisco & Tejero-Díez, José Daniel, 2017, Novelties and notes in Lindsaea (Lindsaeaceae) from Mexico and Central America, pp. 147-160 in Phytotaxa 296 (2) on page 157, DOI: 10.11646/phytotaxa.296.2.4, http://zenodo.org/record/13688000
On the annual and semi-annual components of variations in extent of Arctic and Antarctic sea-ice
Creators: name: Lopes, F.
name: Courtillot, V.
name: Gibert, D.
name: Mouël, JL Le
Publisher: name: arXiv
Year: 2022
Subjects: subject: Geophysics (physics.geo-ph)
subject: FOS: Physical sciences

description: The time series of northern hemisphere (NHSI) and southern hemisphere (SHSI) sea-ice extent are submitted to singular spectral analysis (SSA). The components are analyzed with Laplace's formulation of the Liouville-Euler system. As already shown in a previous work, the trends observed in the time series are quasi linear, decreasing for NHSI and increasing for SHSI. The amplitude of annual variations in the Antarctic is double that in the Arctic, they are in phase opposition, modulated. The semi-annual components are in quadrature. The first 3 components of both NHSI and SHSI at 1, 1/2 and 1/3 yr account for more than 95% of the signal variance. We complement previous analyses of variations in pole position (PM = m1, m2) and length of day (lod). Whereas SSA of lod is dominated by the same first 3 components as sea-ice, SSA of PM contains only the 1 yr and the Chandler components. The 1 yr component of NHSI is in phase with that of lod and in phase opposition with m1. The reverse holds for the 1 yr component of SHSI. We note that the semi-annual component appears in lod not in m1. The annual and semi-annual components of NHSI and SHSI are much larger than the trends observed since 1978, that leads us to test whether a first order geophysical or astronomical forcing should not be preferred to the mechanisms generally suggested as a forcing factor of the trends. The lack of modulation of the largest forced component suggests an alternate mechanism. In Laplace's paradigm, the torques exerted by the Moon, Sun and planets play the leading role as the source of forcing of many geophysical phenomena. These forces lead to changes in the inclination of the Earth's rotation axis, setting Earth masses in motion and resulting in thermal dissipation. It is variations in inclination of the rotation axis that lead to the large annual components of melting and re-freezing of sea-ice.
Evidence for a Gapped Spin-Liquid Ground State in a Kagome Heisenberg Antiferromagnet
Creators: name: Fu, M.
name: Imai, T.
name: Han, T. -H.
name: Lee, Y. S.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The kagome Heisenberg antiferromagnet is a leading candidate in the search for a spin system with a quantum spin-liquid ground state. The nature of its ground state remains a matter of great debate. We conducted 17-O single crystal NMR measurements of the S=1/2 kagome lattice in herbertsmithite ZnCu$_3$(OH)$_6$Cl$_2$, which is known to exhibit a spinon continuum in the spin excitation spectrum. We demonstrate that the intrinsic local spin susceptibility $χ_{kagome}$ deduced from the 17-O NMR frequency shift asymptotes to zero below temperature T ~ 0.03 J, where J ~ 200 K is the Cu-Cu super-exchange interaction. Combined with the magnetic field dependence of $χ_{kagome}$ we observed at low temperatures, these results imply that the kagome Heisenberg antiferromagnet has a spin-liquid ground state with a finite gap.
description: Version accepted for publication in Science
Влияние дилятации левого предсердия на показатели реполяризации желудочков сердца у больных с постинфарктным кардиосклерозом с хронической сердечной недостаточностью со сниженной фракцией выброса
Creators: name: Dadashova, Gulnaz
Publisher: name: Zenodo
Year: 2023

description: Известно, что больные хронической сердечной недостаточно- стью (ХСН) со сниженной фракцией выброса (ХСНнФВ) левого желудочка (ЛЖ) входят в категорию пациентов с высоким риском внезапной сердечной смерти (ВСС), реализующейся посредством возникновения гемодинамически значимых нарушений сердечно- го ритма (НСР). Наряду с этим, в возникновении сердечных аритмий важную роль играют нарушения электрофизиологических процессов в миокарде, в том числе процессов де- и реполяризации. В связи с этим, целью исследования явилась характеристикамаркёров реполяризации у больных с дилятацией левого предсердия (ДЛП) с ХСН III-IV функциональных классов (ФК) по классификации NYHA и со сниженной фракцией выброса (ФВ≤40%).
Fractionalization and topology in amorphous electronic solids
Creators: name: Kim, Sunghoon
name: Agarwala, Adhip
name: Chowdhury, Debanjan
Publisher: name: arXiv
Year: 2022
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Band-topology is traditionally analyzed in terms of gauge-invariant observables associated with crystalline Bloch wavefunctions. Recent work has demonstrated that many of the free fermion topological characteristics survive even in an amorphous setting. In this work, we extend these studies to incorporate the effect of strong repulsive interactions on the fate of topology and other correlation induced phenomena. Using a parton-based approach, we obtain the interacting phase diagram for an electronic two-orbital model with tunable topology in a two dimensional amorphous network. In addition to the (non-)topological phases that are adiabatically connected to the free fermion limit, we find a number of strongly interacting amorphous analogs of crystalline Mott insulating phases with non-trivial chiral neutral edge modes, and a fractionalized Anderson insulating phase. The amorphous networks thus provide a new playground for studying a plethora of exotic states of matter, and their glassy dynamics, due to the combined effects of non-trivial topology, disorder, and strong interactions.
description: 5 pages, 4 figures. Supplementary material: 3 pages, 5 figures
On the Chern numbers for pseudo-free circle actions
Creators: name: An, Byung Hee
name: Cho, Yunhyung
Publisher: name: arXiv
Year: 2016
Subjects: subject: Symplectic Geometry (math.SG)
subject: FOS: Mathematics
subject: 58E40

description: Let $(M,ψ)$ be a $(2n+1)$-dimensional oriented closed manifold equipped with a pseudo-free $S^1$-action $ψ: S^1 \times M \rightarrow M$. We first define a \textit{local data} $\mathcal{L}(M,ψ)$ of the action $ψ$ which consists of pairs $(C, (p(C) ; \overrightarrow{q}(C)))$ where $C$ is an exceptional orbit, $p(C)$ is the order of isotropy subgroup of $C$, and $\overrightarrow{q}(C) \in (\mathbb{Z}_{p(C)}^{\times})^n$ is a vector whose entries are the weights of the slice representation of $C$. In this paper, we give an explicit formula of the Chern number $\langle c_1(E)^n, [M/S^1] \rangle$ modulo $\mathbb{Z}$ in terms of the local data, where $E = M \times_{S^1} \mathbb{C}$ is the associated complex line orbibundle over $M/S^1$. Also, we illustrate several applications to various problems arising in equivariant symplectic topology.
description: 24pages
title: Konferenzethnologische Anmerkungen und Überlegungen zur Sweet Science
Creators: name: Leuschner, Hannes
Publisher: name: Journal of Martial Arts Research
Year: 2018

description: Als Alternative zu herkömmlichen Methoden der Evaluation oder Dokumentation wurde auf der  6th Annual Conference of the dvs Commitee for Martial Arts Studies in the German Association for Sports Sciences das Format einer 'konferenzethnologischen' Begleitung getestet. Im ersten Teil dieses Beitrags werden einige Überlegungen zu den Möglichkeiten und Schwierigkeiten eines solchen Ansatzes vorgestellt; im zweiten Teil werden einige kulturelle Charakteristika der Konferenz dargelegt. Ein dritter Teil beschäftigt sich mit dem für die Konferenz zentralen Thema der Bezüge zwischen Kampfkunst und Wissenschaft.
description: Journal of Martial Arts Research, Bd. 1 Nr. 2 (2018): Tagungsbeiträge 2017
An Analysis of Search Firm Success in College Football Head Coach Hiring
Creators: name: Read, Andrew
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2017

description: As a result of increased importance in the success of football programs, a number of athletic directors have elected to use the services of a search firm as an aid in the hiring of a new football coach. The purpose of this study is to determine whether search firms outperform athletic directors in successful football coaching hires. Coaches hired between 2005 and 2014 and currently employed by the school that hired them had data collected on their winning percentage, recruiting rankings, and NCAA infractions. Coaches were determined whether they were hired by a search firm or without outside help. Means were compared between the two groups. Means showed no significant difference in the two groups in the three areas compared.
Take-all on Broadbalk Wheat, 1958-1967, Rothamsted Experimental Station Report for 1968 - Part 2
Creators: name: JUDITH ETHERIDGE
Publisher: name: Lawes Agricultural Trust
Year: 1969
Subjects: subject: rothamsted research
subject: broadbalk long-term experiment
subject: take all fungus

description: Scanned PDF of Take-all on Broadbalk Wheat, 1958-1967, part of Rothamsted Experimental Station Report for 1968 - Part 2
YIELDS OF SUGAR BEET AND BARLEY IN CONTRASTING CROP ROTATIONS AT BROOM'S BARN, 1971-76, Rothamsted Experimental Station Report for 1977 Part 2
Creators: name: A. P. DRAYCOTT, M. J. DURRANT
Publisher: name: Lawes Agricultural Trust
Year: 1978
Subjects: subject: rothamsted research
subject: crop yield
subject: apiculture
subject: sugarbeet
subject: Brooms barn research centre
subject: Rothamsted ley-arable rotation experiment

description: Scanned PDF of YIELDS OF SUGAR BEET AND BARLEY IN CONTRASTING CROP ROTATIONS AT BROOM'S BARN, 1971-76, part of Rothamsted Experimental Station Report for 1977 Part 2
SBHC Scoping Review Protocol
Creators: name: Babiy, Zoryana
Publisher: name: Open Science Framework
Year: 2022
Subjects: subject: Medicine and Health Sciences

description: This is a protocol for School-Based Health Centres. We are hoping to outline the search strategy, study selection, data extraction, & synthesis & presentation of the results. This scoping review aims to evaluate the mental-health, developmental and educational outcomes of children (ages 3-12) living in urban settings & attending SBHC.
Optimization-free Approach for Analog Filter Design through Spatial and Temporal Soft Switching of the Dielectric Constant
Creators: name: Silbiger, Ohad
name: Hadad, Yakir
Publisher: name: arXiv
Year: 2022
Subjects: subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: The inverse-scattering problem of an inhomogeneous material has been of interest for many years, and was generally addressed with various optimization techniques. In this paper, we suggest an optimization-free method for solving the inverse-scattering problem of a one-dimensional inhomogeneous medium and use this to demonstrate the design of desired reflection frequency response. In addition, we derive the governing equation of an analog problem - a time-dependent homogeneous medium and use the same technique to design a temporal switching profile for the design of frequency response in k-space.
description: 5 pages 5 figures
Global description of beta-minus decay in even-even nuclei with the axially-deformed Skyrme finite amplitude method
Creators: name: Mustonen, M. T.
name: Engel, J.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We use the finite amplitude method for computing charge-changing Skyrme-QRPA transition strengths in axially-deformed nuclei together with a modern Skyrme energy-density functional to fit several previously unconstrained parameters in the charge-changing time-odd part of the functional. With the modified functional we then calculate rates of beta-minus decay for all medium-mass and heavy even-even nuclei between the valley of stability and the neutron drip line. We fit the Skyrme parameters to a limited set of beta-decay rates, a set of Gamow-Teller resonance energies, and a set of spin-dipole resonance energies, in both spherical and deformed nuclei. Comparison to available experimental beta-decay rates shows agreement at roughly the same level as in other global QRPA calculations. We estimate the uncertainty in our rates all the way to the neutron drip line through a construction that extrapolates the errors of known beta-decay rates in nuclei with intermediate Q values to less stable isotopes with higher Q values.
description: 11 pages, 7 figures
Twice upon a time: thematic intersections between Beethoven's String Quartet in A Minor, op. 132 and Symphony no. 9 in D Minor, op. 125
Creators: name: Graber, Naomi
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2009

description: Beethoven's Ninth Symphony, op. 125 displays a number of intertextualities with the String Quartet in A minor, op. 132. These connections likely result from their shared compositional history; the theme of op. 132's finale was probably originally intended as an instrumental alternative to the final movement of the symphony. The similarities indicate that the pieces share a relationship similar to other famous pairs of Beethoven's pieces, such as the Fifth and Sixth Symphonies opp. 67 and 68, while the differences point to how he justified their alternate endings. The differing narrative trajectories of op. 125 and op. 132 sheds light on Beethoven's process of writing satisfactory conclusions to multi-movement cycles, particularly providing insight into the two finales for the Quartet in B-flat, op. 130: the Grosse Fuge op. 133, or the published rondo. Further examination reveals trends in Beethoven's compositional thought as heroic style gave way to late style.
Scaling behavior of the Compton profile of alkali metals
Creators: name: Sekania, M.
name: Appelt, W. H.
name: Benea, D.
name: Ebert, H.
name: Vollhardt, D.
name: Chioncel, L.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The contribution of the valence electrons to the Compton profiles of the alkali metals is calculated using density functional theory. We show that the Compton profiles can be modeled by a $q-$Gaussian distribution, which is characterized by an anisotropic, element dependent parameter $q$. Thereby we derive an unexpected scaling behavior of the Compton profiles of all alkali metals.
description: 10 pages, 5 figures
Walker's cancellation theorem
Creators: name: Lubarsky, Robert
name: Richman, Fred
Publisher: name: arXiv
Year: 2015
Subjects: subject: Logic (math.LO)
subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 20D99, 03F65

description: Walker's cancellation theorem says that if B+Z is isomorphic to C+Z in the category of abelian groups, then B is isomorphic to C. We construct an example in a diagram category of abelian groups where the theorem fails. As a consequence, the original theorem does not have a constructive proof even if B and C are subgroups of the free abelian group on two generators. Both of these results contrast with a group whose endomorphism ring has stable range one, which allows a constructive proof of cancellation and also a proof in any diagram category.
A Scheme for Maximal Resource Utilization in Peer-to-Peer Live Streaming
Creators: name: Alghazawy, Bahaa Aldeen
name: Fujita, Satoshi
Publisher: name: arXiv
Year: 2015
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: Peer-to-Peer streaming technology has become one of the major Internet applications as it offers the opportunity of broadcasting high quality video content to a large number of peers with low costs. It is widely accepted that with the efficient utilization of peers and server's upload capacities, peers can enjoy watching a high bit rate video with minimal end-to-end delay. In this paper, we present a practical scheduling algorithm that works in the challenging condition where no spare capacity is available, i.e., it maximally utilizes the resources and broadcasts the maximum streaming rate. Each peer contacts with only a small number of neighbours in the overlay network and autonomously subscribes to sub-streams according to a budget-model in such a way that the number of peers forwarding exactly one sub-stream will be maximized. The hop-count delay is also taken into account to construct a short depth trees. Finally, we show through simulation that peers dynamically converge to an efficient overlay structure with a short hop-count delay. Moreover, the proposed scheme gives nice features in the homogeneous case and overcomes SplitStream in all simulated scenarios.
description: 16 pages in International Journal of Computer Networks & Communications (IJCNC) Vol.7, No.5, September 2015
Principles Weaker than BD-N
Creators: name: Lubarsky, Robert S.
name: Diener, Hannes
Publisher: name: arXiv
Year: 2015
Subjects: subject: Logic (math.LO)
subject: FOS: Mathematics
subject: 03F60, 03F50, 03C90, 26E40

description: BD-N is a weak principle of constructive analysis. Several interesting principles implied by BD-N have already been identified, namely the closure of the anti-Specker spaces under product, the Riemann Permutation Theorem, and the Cauchyness of all partially Cauchy sequences. Here these are shown to be strictly weaker than BD-N, yet not provable in set theory alone under constructive logic.
Predictions of Electromotive Force of Magnetic Shape Memory Alloy (MSMA) Using Constitutive Model and Generalized Regression Neural Network
Creators: name: Emu, Md Esharuzzaman
Publisher: name: arXiv
Year: 2022
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Machine Learning (stat.ML)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences
subject: G.1.8
subject: 34

description: Ferromagnetic shape memory alloys (MSMAs), such as Ni-Mn-Ga single crystals, can exhibit the shape memory effect due to an applied magnetic field at room temperature. Under a variable magnetic field and a constant bias stress loading, MSMAs have been used for actuation applications. This work introduced a new feature to the existing macroscale magneto-mechanical model for Ni-Mn-Ga single crystal. This model includes the fact that the magnetic easy axis in the two variants is not exactly perpendicular as observed by D silva et al. This offset helps explain some of the power harvesting capabilities of MSMAs. Model predictions are compared to experimental data collected on a Ni-Mn-Ga single crystal. The experiments include both stress-controlled loading with constant bias magnetic field load (which mimics power harvesting or sensing) and fieldcontrolled loading with constant bias compressive stress (which mimics actuation). Each type of test was performed at several different load levels, and the applied field was measured without the MSMA specimen present so that demagnetization does not affect the experimentally measured field as suggested by Eberle et al. Results show decent agreement between model predictions and experimental data. Although the model predicts experimental results decently, it does not capture all the features of the experimental data. In order to capture all the experimental features, finally, a generalized regression neural network (GRNN) was used to train the experimental data (stress, strain, magnetic field, and emf) so that it can make a reasonably better prediction.
description: 10 pages, 15 figures
Separating the Fan Theorem and Its Weakenings
Creators: name: Lubarsky, Robert S.
name: Diener, Hannes
Publisher: name: arXiv
Year: 2015
Subjects: subject: Logic (math.LO)
subject: FOS: Mathematics
subject: 03C90, 03F50, 03F60, 03H05

description: Varieties of the Fan Theorem have recently been developed in reverse constructive mathematics, corresponding to different continuity principles. They form a natural implicational hierarchy. Some of the implications have been shown to be strict, others strict in a weak context, and yet others not at all, using disparate techniques. Here we present a family of related Kripke models which separates all of the as yet identified fan theorems.
CHAMP-1 Pilot Retention Data
Creators: name: Watson, Michelle
Publisher: name: Open Science Framework
Year: 2022
Subjects: subject: Medicine and Health Sciences

description: CHAMP-1 Pilot Retention Data and related documents associated with the manuscipt titled 'Optimising retention success: a research team’s experience of following-up participants recruited to a pilot trial through community pharmacies in England', to be published in F1000.
Modulation of attosecond beating by resonant two-photon transition
Creators: name: Galán, Álvaro Jiménez
name: Argenti, Luca
name: Martín, Fernando
Publisher: name: arXiv
Year: 2015
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We present an analytical model that characterizes two-photon transitions in the presence of autoionising states. We applied this model to interpret resonant RABITT spectra, and show that, as a harmonic traverses a resonance, the phase of the sideband beating significantly varies with photon energy. This phase variation is generally very different from the $π$ jump observed in previous works, in which the direct path contribution was negligible. We illustrate the possible phase profiles arising in resonant two-photon transitions with an intuitive geometrical representation.
description: Manuscript for the Proceedings of the XXIX International Conference on Photonic, Electronic, and Atomic Collisions (ICPEAC XXIX), held in Toledo (Spain) July 22-28 2015, where \'Alvaro Jim\'enez Gal\'an gave special report presentation with the same title as the manuscript
Exact Path Integral for 3D Quantum Gravity II
Creators: name: Honda, Masazumi
name: Iizuka, Norihiro
name: Tanaka, Akinori
name: Terashima, Seiji
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Continuing the work arXiv:1504.05991, we discuss various aspects of three dimensional quantum gravity partition function in AdS in the semi-classical limit. The partition function is holomorphic and is the one which we obtained by using the localization technique of Chern-Simons theory in arXiv:1504.05991. We obtain a good expression for it in the summation form over Virasoro characters for the vacuum and primaries. A key ingredient for that is an interpretation of boundary localized fermion. We also check that the coefficients in the summation form over Virasoro characters of the partition function are positive integers and satisfy the Cardy formula. These give physical interpretation that these coefficients represent the number of primary fields in the dual CFT in the large k limit.
description: 5 pages
MPEC 2023-O65 : DAILY ORBIT UPDATE (2023 July 24)
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2023
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Nodal Geometry, Heat Diffusion and Brownian Motion
Creators: name: Georgiev, Bogdan
name: Mukherjee, Mayukh
Publisher: name: arXiv
Year: 2016
Subjects: subject: Differential Geometry (math.DG)
subject: Analysis of PDEs (math.AP)
subject: Spectral Theory (math.SP)
subject: FOS: Mathematics

description: We use tools from $n$-dimensional Brownian motion in conjunction with the Feynman-Kac formulation of heat diffusion to study nodal geometry on a compact Riemannian manifold $M$. On one hand we extend a theorem of Lieb and prove that any nodal domain $Ω_λ$ almost fully contains a ball of radius $\sim \frac{1}{\sqrtλ}$. This also gives a slight refinement of a result by Mangoubi, concerning the inradius of nodal domains (\cite{Man2}). On the other hand, we also prove that no nodal domain can be contained in a reasonably thin tubular neighbourhood of unions of finitely many surfaces inside $M$.
description: 16 pages, final accepted version, comments welcome!
On two notions of total positivity for partial flag varieties
Creators: name: Bloch, Anthony M.
name: Karp, Steven N.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Combinatorics (math.CO)
subject: Algebraic Geometry (math.AG)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: 15B48, 14M15, 52B40, 81T60

description: Given integers $1 \le k_1 < \cdots < k_l \le n-1$, let $\text{Fl}_{k_1,\dots,k_l;n}$ denote the type $A$ partial flag variety consisting of all chains of subspaces $(V_{k_1}\subset\cdots\subset V_{k_l})$ inside $\mathbb{R}^n$, where each $V_k$ has dimension $k$. Lusztig (1994, 1998) introduced the totally positive part $\text{Fl}_{k_1,\dots,k_l;n}^{>0}$ as the subset of partial flags which can be represented by a totally positive $n\times n$ matrix, and defined the totally nonnegative part $\text{Fl}_{k_1,\dots,k_l;n}^{\ge 0}$ as the closure of $\text{Fl}_{k_1,\dots,k_l;n}^{>0}$. On the other hand, following Postnikov (2007), we define $\text{Fl}_{k_1,\dots,k_l;n}^{Δ>0}$ and $\text{Fl}_{k_1,\dots,k_l;n}^{Δ\ge 0}$ as the subsets of $\text{Fl}_{k_1,\dots,k_l;n}$ where all Plücker coordinates are positive and nonnegative, respectively. It follows from the definitions that Lusztig's total positivity implies Plücker positivity, and it is natural to ask when these two notions of positivity agree. Rietsch (2009) proved that they agree in the case of the Grassmannian $\text{Fl}_{k;n}$, and Chevalier (2011) showed that the two notions are distinct for $\text{Fl}_{1,3;4}$. We show that in general, the two notions agree if and only if $k_1, \dots, k_l$ are consecutive integers. We give an elementary proof of this result (including for the case of Grassmannians) based on classical results in linear algebra and the theory of total positivity. We also show that the cell decomposition of $\text{Fl}_{k_1,\dots,k_l;n}^{\ge 0}$ coincides with its matroid decomposition if and only if $k_1,\dots,k_l$ are consecutive integers, which was previously only known for complete flag varieties, Grassmannians, and $\text{Fl}_{1,3;4}$. Finally, we determine which notions of positivity are compatible with a natural action of the cyclic group of order $n$ that rotates the index set.
description: 21 pages. v2: Minor changes
Identifying and addressing psychosocial determinants of adherence to physical distancing guidance during the COVID-19 pandemic
Creators: name: Durand, Hannah
name: Molloy, Gerry
name: Kenny, Eanna
name: Byrne, Molly
name: Noone, Chris
name: McGuire, Brian
name: O'Connor, Laura
name: Meade, Oonagh
name: Mc Sharry, Jenny
name: Lavoie, Kim
name: Bacon, Simon
name: O'Flaherty, Kate
name: Mooney, Robert
Publisher: name: Open Science Framework
Year: 2022
Subjects: subject: Public Health
subject: Medicine and Health Sciences
subject: Social and Behavioral Sciences
subject: Psychology
subject: FOS: Psychology
subject: behaviour change
subject: COVID-19
subject: physical distancing
subject: SARS-CoV-2
subject: social distancing

description: Optimising public health physical distancing measures has been a critical part of the global response to the spread of COVID-19. Evidence collected during the current pandemic shows that the transmission rate of the virus is significantly reduced following implementation of intensive physical distancing measures. Adherence to these recommendations has been poorer than adherence to other key transmission reduction behaviours such as handwashing. There are a complex range of reasons that are likely to predict why people do not or only partially adhere to physical distancing recommendations. In the current project we aim to address the following research questions: (1) What are the psychosocial determinants of physical distancing for the general public and for key socio-demographic sub-groups (e.g., young adults, older adults, etc.)?; (2) Do current Government of Ireland COVID-19 physical distancing communications address the determinants of physical distancing?; and (3) How can communications be optimised and tailored to sub-groups to ensure maximum adherence to guidelines? These will be addressed by conducting three work packages (WPs). In WP1, we will work closely with the iCARE international study, which includes a large online survey of public responses to measures established to reduce and slow the spread of COVID-19, including physical distancing. We will analyse Irish data, comparing it to data from other countries, to identify the key psychosocial determinants of physical distancing behaviour. This will be followed by a qualitative study to explore in depth the barriers and facilitators of physical distancing behaviour among the Irish public (WP2). In WP3, we will conduct a content analysis and evidence mapping of current government messaging around physical distancing, to ensure the findings from this research feed into the development of ongoing communication and future messaging about physical distancing.
On Rational Solutions of Dressing Chains of Even Periodicity
Creators: name: Aratyn, H.
name: Gomes, J. F.
name: Lobo, G. V.
name: Zimerman, A. H.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: 33E17, 34M55

description: We develop a systematic approach to deriving rational solutions and obtaining classification of their parameters for dressing chains of even N periodicity or equivalently $A^{(1)}_{N-1}$ invariant Painlevé equations. This construction identifies rational solutions with points on orbits of fundamental shift operators acting on first-order polynomial solutions derived for dressing chains of even periodicity. We also obtain conditions for the existence of special function solutions that occur for a special class of first-order polynomial solutions. For the special case of the N=4 dressing chain equations the method yields all the known rational solutions of Painlevé V equation. They are obtained through action of shift operators on the two independent first-order polynomial solutions. The formalism naturally extends to N=6 and beyond as shown in the paper.
description: 29 pages
Moduli of Continuity for Viscosity Solutions
Creators: name: Li, Xiaolong
Publisher: name: arXiv
Year: 2015
Subjects: subject: Analysis of PDEs (math.AP)
subject: Differential Geometry (math.DG)
subject: FOS: Mathematics

description: In this paper, we investigate the moduli of continuity for viscosity solutions of a wide class of nonsingular quasilinear evolution equations and also for the level set mean curvature flow, which is an example of singular degenerate equations. We prove that the modulus of continuity is a viscosity subsolution of some one dimensional equation. This work extends B. Andrews' recent result on moduli of continuity for smooth spatially periodic solutions.
description: 8 pages
Electronic nature of the lock-in magnetic transition in CeXAl4Si2
Creators: name: Gunasekera, J.
name: Harriger, L.
name: Dahal, A.
name: Maurya, A.
name: Heitmann, T.
name: Disseler, S.
name: Thamizhavel, A.
name: Dhar, S.
name: Singh, D. K.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We have investigated the underlying magnetism in newly discovered single crystal Kondo lattices CeXAl4Si2, where X = Rh, Ir. We show that the compound undergoes an incommensurate-to-commensurate magnetic transition at Tc = 9.19 K (10.75 K in Ir). The spin correlation in the incommensurate phase is described by a spin density wave configuration of Ce-ions, which locks-in to the long-range antiferromagnetic order at T = Tc. The qualitative analysis of the experimental data suggests the role of the Fermi surface nesting, instead of the lattice distortion causing the Umklapp correction or the soliton propagation, as the primary mechanism behind this phenomenon.
description: 5 pages, 4 figures
Coherent radiation from a chain of charged particles on a circular orbit around a dielectric ball
Creators: name: Grigoryan, L. Sh.
name: Mkrtchyan, A. H.
name: Dabagov, S. B.
name: Saharian, A. A.
name: Kocharyan, V. R.
name: Kotanjyan, V. Kh.
name: Harutyunyan, H. P.
name: Khachatryan, H. F.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Accelerator Physics (physics.acc-ph)
subject: FOS: Physical sciences

description: We investigate the electromagnetic radiation from a chain of relativistic charged particles uniformly rotating along equatorial orbit around a dielectric ball. For weak absorption of radiation in the ball material, at certain rotation frequency the radiation intensity becomes significantly higher than the corresponding value for a chain of charges rotating in free space or in a transparent medium with the same dielectric constant as that for the ball material. In the case of an equidistant distribution of charged particles along the orbit we determine the values of parameters of the problem for which the charges in the chain emit coherently. It is shown that the radiation intensity on a given harmonic increases in proportion to the square of the number of emitting charges. We also show that the relative shifts in the particles locations up to 10\% do not destroy the coherence properties of the radiation. It is demonstrated that the coherence effects may also dominate in the radiation intensity for chains with non-equidistant distributions of particles. The numerical results obtained for different dielectric balls have revealed the emitted radiation to be in the GHz/THz frequency ranges. The high-power radiation of the chain propagates in the angular range with respect to the rotation plane determined by the Cherenkov condition for the velocity of the chain projection onto the ball surface.
description: 15 pages, 4 figures, discussion of peaks and references added
Hybrid thermal modeling of additive manufacturing processes using physics-informed neural networks for temperature prediction and parameter identification
Creators: name: Liao, Shuheng
name: Xue, Tianju
name: Jeong, Jihoon
name: Webster, Samantha
name: Ehmann, Kornel
name: Cao, Jian
Publisher: name: arXiv
Year: 2022
Subjects: subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Understanding the thermal behavior of additive manufacturing (AM) processes is crucial for enhancing the quality control and enabling customized process design. Most purely physics-based computational models suffer from intensive computational costs and the need of calibrating unknown parameters, thus not suitable for online control and iterative design application. Data-driven models taking advantage of the latest developed computational tools can serve as a more efficient surrogate, but they are usually trained over a large amount of simulation data and often fail to effectively use small but high-quality experimental data. In this work, we developed a hybrid physics-based data-driven thermal modeling approach of AM processes using physics-informed neural networks. Specifically, partially observed temperature data measured from an infrared camera is combined with the physics laws to predict full-field temperature history and to discover unknown material and process parameters. In the numerical and experimental examples, the effectiveness of adding auxiliary training data and using the pretrained model on training efficiency and prediction accuracy, as well as the ability to identify unknown parameters with partially observed data, are demonstrated. The results show that the hybrid thermal model can effectively identify unknown parameters and capture the full-field temperature accurately, and thus it has the potential to be used in iterative process design and real-time process control of AM.
BioExcel-2 Deliverable 1.4 Project release of core applications
Creators: name: Hess, Berk
name: Bauer, Paul
name: Lindahl, Erik
name: Honorato, Rodrigo
name: Bonvin, Alexandre
name: Jimenez-Garcia, Brian
name: Morozon, Dmitriy
name: Groenhof, Gerrit
name: Proeme, Arno
name: Judge, Holy
Publisher: name: Zenodo
Year: 2020
Subjects: software engineering

description: This document describes the contents of the third project release (first in BioExcel-2), of software developed for the core applications in BioExcel. The efforts of Work Package 1 are spread over the entire project timeframe, and some collaborations, deployments or benchmarks might also use preliminary new code. However, to establish known benchmark baselines and provide reference versions of all codes used in the project (e.g. to integrate them in BioExcel workflows and use by other BioExcel teams), the Work Package also makes these formal code releases. This also comes with records describing the current status of the software that results from the planning, development, documentation, and testing processes. The release itself takes the form of a package of Open Source licensed source code, and can be downloaded from the BioExcel webpage at http://bioexcel.eu/software/code-repositories. For most of the codes this is a BioExcel-specific repository to sync the releases with other project needs, while general users are usually recommended to follow the documentation, download and installation instructions available on the normal application web pages.
BioExcel-2 D1.1 – Specification of software engineering and QA
Creators: name: Bauer, Paul
name: Reid, Fiona
name: Bonvin, Alexandre
name: Honoratos, Rodrigo Vargas
name: Jiménez-García, Brian
name: Gapsys, Vytautas
name: Abraham, Mark
name: Carter, Adam
Publisher: name: Zenodo
Year: 2020
Subjects: Project Management
Software Engineering

description: This document describes the current state and planning of the software engineering tasks within BioExcel2 WP11 . The quality assurance (QA) and testing practices for the application software GROMACS, HADDOCK and CP2K, as well as the GROMACS linked input preparation tool PMX are described. The plans on how to continue the implementation of software engineering best practices are outlined for the projects, to ensure that the planned improvements for usability, scalability and performance do not negatively affect the correctness of the software codes and their associated web portals. In addition, this document reports on initial benchmarking and profiling of QM/MM biomolecular simulations in CP2K, which is critically important for BioExcel to understand how to produce high impact in this area. While such simulations have tremendous potential for impact at the exascale, biomolecular QM/MM is not as mature as e.g. classical MD or docking; all work in this area carries both high risk and reward. Very limited experience exists among biomolecular simulation users and developers, including within the BioExcel consortium. The report includes details of the work undertaken, presented to illustrate the approaches used, including development of appropriate test cases, and the approaches used to ensure that the results obtained from (short) test cases are meaningful for production simulation runs. In the short period of time available, scaling graphs and profiles have been obtained. Scaling results have demonstrated limited scaling, consistent with several existing CP2K benchmarks which are based on similar system sizes. For these kinds of problems, CP2K does not appear to currently scale well beyond about 16 nodes, notably worse than the headline scalability figures often quoted for CP2K on other problem types. Several relevant routines have been identified for further investigation, but initial results indicate that improving scaling on these problems could be challenging. To mitigate the risk associated with investing time on the code with limited return, the consortium has agreed a future checkpoint at PM8 for a final decision on whether further effort should be invested in optimization of CP2K for biomolecular QM/MM.
Clinician Patterns of Ankle Brace Recommendation and Perception of Factors Associated with Brace Use
Creators: name: Denton, Jason Matthew
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2007

description: A group of athletic trainers and physical therapists were surveyed to determine which ankle braces they recommend most frequently to prevent ankle sprain injury, which factors associated with brace use influence decisions about ankle brace recommendation, and to determine if perceptions about factors associated with brace use are related to patterns of ankle brace recommendation. The ASO brace was the ankle brace recommended most frequently. Clinicians reported effectiveness in preventing ankle sprain injury was the most influential factor when recommending a specific ankle brace. Additionally, clinicians reported comfort of an ankle brace was the next most influential factor. Clinicians' concern about reduced ankle muscle strength after wearing an ankle brace for a period of time was related to the likelihood of whether they would recommend use of an ankle brace for patients after an ankle sprain injury.