cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Electrostatic Landscape of a H-Silicon Surface Probed by a Moveable Quantum Dot
Creators: name: Huff, Taleana
name: Dienel, Thomas
name: Rashidi, Mohammad
name: Achal, Roshan
name: Livadaru, Lucian
name: Croshaw, Jeremiah
name: Wolkow, Robert A.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: With nanoelectronics reaching the limit of atom-sized devices, it has become critical to examine how irregularities in the local environment can affect device functionality. Here, we characterize the influence of charged atomic species on the electrostatic potential of a semiconductor surface at the sub-nanometer scale. Using non-contact atomic force microscopy, two-dimensional maps of the contact potential difference are used to show the spatially varying electrostatic potential on the (100) surface of hydrogen-terminated highly-doped silicon. Three types of charged species, one on the surface and two within the bulk, are examined. An electric field sensitive spectroscopic signature of a single probe atom reports on nearby charged species. The identity of one of the near-surface species has been uncertain. That species, suspected of being boron or perhaps a negatively charged donor species, we suggest is of a character more consistent with either a negatively charged interstitial hydrogen or a hydrogen vacancy complex.
TOWARDS END-TO-END SPOKEN GRAMMATICAL ERROR CORRECTION
Creators: name: Bannò, S
name: Ma, R
name: Qian, M
name: Knill, KM
name: Gales, MJF
Publisher: name: IEEE
Year: 2024
Subjects: 47 Language, Communication and Culture
4703 Language Studies
4704 Linguistics

description: Grammatical feedback is crucial for L2 learners, teachers, and testers. Spoken grammatical error correction (GEC) aims to supply feedback to L2 learners on their use of grammar when speaking. This process usually relies on a cascaded pipeline comprising an ASR system, disfluency removal, and GEC, with the associated concern of propagating errors between these individual modules. In this paper, we introduce an alternative "end-to-end" approach to spoken GEC, exploiting a speech recognition foundation model, Whisper. This foundation model can be used to replace the whole framework or part of it, e.g., ASR and disfluency removal. These end-to-end approaches are compared to more standard cascaded approaches on the data obtained from a free-speaking spoken language assessment test, Linguaskill. Results demonstrate that end-to-end spoken GEC is possible within this architecture, but the lack of available data limits current performance compared to a system using large quantities of text-based GEC data. Conversely, end-to-end disfluency detection and removal, which is easier for the attention-based Whisper to learn, does outperform cascaded approaches. Additionally, the paper discusses the challenges of providing feedback to candidates when using end-to-end systems for spoken GEC.
Colpocephalum foetens
Creators: name: Gonza ́ Lez-Acun, Daniel A.
name: Palma, Ricardo L.
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Psocodea
Menoponidae
Colpocephalum
Colpocephalum foetens

description: Colpocephalum foetens (Eichler, 1954)
 Neocolpocephalum foetens Eichler, 1954: 44, figs 27–29.
 Colpocephalum foetens (Eichler, 1954); Price & Beer 1963a: 738, fig. 3.
 Colpocephalum foetens (Eichler, 1954); Price et al. 2003: 98.
 Neocolpocephalum foetens Eichler, 1954; Moreno & González-Acuña 2015: 95.
 Neocolpocephalum foetens Eichler, 1954; González-Acuña & Moreno 2018: 262.
 Syntypes ♂ ♀ in ZMHU (see Göllner-Scheiding 1973: 34) and in NHML (see Shchedrina et al. 2017).
 Type host: Coragyps atratus foetens Lichstenstein, 1817.
 Chilean host: Coragyps atratus foetens Lichstenstein, 1817.
 Other host: Cathartes burrovianus (Linnaeus, 1758).
Chilean locality: Iquique: Region I.
Geographic distribution: North, Central and South America.
Chilean references: Eichler (1954); Göllner-Scheiding (1973); Moreno & González-Acuña (2015); González-Acuña & Moreno (2018).
 Other significant references: Price & Beer (1963a); Price et al. (2003).
 Remarks: As stated in the Methods and conventions above, we follow the taxonomy used by Price et al. (2003); therefore, we revert this species to the genus Colpocephalum.
description: Published as part of Gonza ́ Lez-Acun, Daniel A. & Palma, Ricardo L., 2021, An annotated catalogue of bird lice (Insecta: Phthiraptera) from Chile, pp. 1-151 in Zootaxa 5077 (1) on pages 18-19, DOI: 10.11646/zootaxa.5077.1.1, http://zenodo.org/record/5766642
Survey of Project-based Maturity Assessment Model
Creators: name: Lin, Tzuchieh
name: Wang, Kung Jeng
Publisher: name: figshare
Year: 2021
Subjects: subject: 91099 Manufacturing Engineering not elsewhere classified
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: 91005 Manufacturing Management
subject: 91006 Manufacturing Processes and Technologies (excl. Textiles)

description: Manufacturing companies face the challenge of effectively implementing smart transformation. This questionnaire is designed to investigate the relationship between project management and enterprises in stages of smart transformation.
Principal co-Higgs bundles on $\mathbb{P}^1$
Creators: name: Biswas, Indranil
name: García-Prada, Oscar
name: Hurtubise, Jacques
name: Rayan, Steven
Publisher: name: arXiv
Year: 2018
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 14H60, 14D20, 14D21

description: For complex connected, reductive, affine, algebraic groups $G$, we give a Lie-theoretic characterization of the semistability of principal $G$-co-Higgs bundles on the complex projective line $\mathbb{P}^1$ in terms of the simple roots of a Borel subgroup of $G$. We describe a stratification of the moduli space in terms of the Harder-Narasimhan type of the underlying bundle.
description: 17 pages
Pressure-induced densification of vitreous silica: insight from elastic properties
Creators: name: Weigel, Coralie
name: Mebarki, Marouane
name: Clément, Sébastien
name: Vacher, René
name: Foret, Marie
name: Rufflé, Benoit
Publisher: name: arXiv
Year: 2019
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: \textit{In situ} high-pressure Brillouin light scattering experiments along loading-unloading paths are used to investigate the compressibility of vitreous silica. An accurate equation of state is obtained below \SI{9}{GPa} using sound velocities corrected for dispersion. Conversely, huge inelastic effects are observed in the range \SIrange{10}{60}{GPa}, unveiling the reversible transformation from the fourfold-coordinated structure to the sixfold one. We find that the associated density changes fully correlate with the average Si coordination number. Decompression curves from above \SI{20}{GPa} reveal abrupt backward coordination changes around \SIrange{10}{15}{GPa} and significant hysteresis. Further, contrary to common wisdom, the residual densification of recovered silica samples can be figured out from the pressure cycles.
description: 5 pages, 4 figures, revised version
The underscreened Kondo effect in ladder systems
Creators: name: Hur, Karyn Le
Publisher: name: arXiv
Year: 1999
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We introduce a new Kondo ladder model by coupling the well-known Takhtajan-Babujan S=1 chain to a half-filled one-dimensional electron gas, and we solve it using quantum field theory techniques. Through the so-called underscreened Kondo effect, this gives novel insights into low-dimensional spin liquid systems. For instance, the optical conductivity reveals only a pseudogap at $k=π$ despite of the insulating state, a coherent magnon peak in the dynamical spin susceptibility coexists with an incoherent spinon background, the magnetization yields a fractional-like quantization. More generally, this problem belongs to the class of Luttinger liquids in active environments, a topic of importance not only to the Kondo physics, but also to striped phases or carbon nanotubes. Experimental consequences on heavy-fermion systems are also discussed.
description: 5 pages, RevTeX; to be published in Physical Review Letters
Colpocephalum heterosoma Piaget 1880
Creators: name: Gonza ́ Lez-Acun, Daniel A.
name: Palma, Ricardo L.
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Psocodea
Menoponidae
Colpocephalum
Colpocephalum heterosoma

description: Colpocephalum heterosoma Piaget, 1880
 Colpocephalum heterosoma Piaget, 1880: 572, pl. 48: figs 3–4.
 Colpocephalum heterosoma Piaget, 1880; Kellogg 1906: 321.
 Colpocephalum heterosoma Piaget, 1880; Clay 1951b: 1059, figs 1–7, 9–12.
 Colpocephalum heterosoma Piaget, 1880; Price & Beer 1965: 128, figs 89–91.
 Colpocephalum heterosoma Piaget, 1880; Galaz et al. 1999: 18, fig. 2.
 Colpocephalum heterosoma Piaget, 1880; Price et al. 2003: 99.
Lectotype ♂ in NHML (see Clay 1951b: 1162).
 Type host: Phoenicopterus ruber roseus Pallas, 1811.
 Chilean host: Phoenicopterus chilensis Molina, 1782.
 Other hosts: Phoenicopterus ruber ruber Linnaeus, 1758; Phoeniconaias minor (Geoffroy St.-Hilaire, 1798); Phoenicoparrus jamesi (Sclater, 1886).
Chilean locality: Salar Surire: Region XV.
Geographic distribution: All continents, except Antarctica.
 Chilean references: Price & Beer (1965); Galaz et al. (1999).
 Other significant references: Clay (1951); Clay (1974: 484); Price et al. (2003); Palma & Price (2010: 145); Palma & Peck (2013: 17).
 Remarks:Among the three species of Colpocephalum parasitic on flamingoes, C. heterosoma is the most widespread, recorded from four host species belonging to three genera (Price et al. 2003: 99).
description: Published as part of Gonza ́ Lez-Acun, Daniel A. & Palma, Ricardo L., 2021, An annotated catalogue of bird lice (Insecta: Phthiraptera) from Chile, pp. 1-151 in Zootaxa 5077 (1) on page 19, DOI: 10.11646/zootaxa.5077.1.1, http://zenodo.org/record/5766642
Coherent vs incoherent transport in holographic strange insulators
Creators: name: Andrade, Tomas
name: Krikun, Alexander
Publisher: name: arXiv
Year: 2018
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Holographic strange metals are known to have a power law resistivity rising with temperature, which is reminiscent of the strange metal phases in condensed matter systems. In some holographic models, however, the exponent of the power law in the resistivity can be negative. In this case one encounters phases with diverging resistivity at zero temperature: holographic strange insulators. These states arise as a result of translational symmetry breaking in the system, which can either be strong explicit and relevant in the IR, or spontaneous, but pinned by a small explicit source. In some regards, one can associate these two classes to the normal band insulators due to the strong ionic potential, and Mott insulator due to the commensurate lock in of the charge density wave. We study different features of these classes on the explicit example of a holographic helical model with homogeneous Bianchy VII type translational symmetry breaking, and uncover the main mechanisms underlying transport in these two cases. We find that while transport in the explicit relevant case is governed by the incoherent conductivity, in the pinned spontaneous case the leading contribution comes from the coherent part.
description: 21 pages + appendices, 15 figures; v2: revised version
Excited pions, rho- and omega-mesons and their decays in a chiral SU(2) x SU(2) Lagrangian
Creators: name: Volkov, M. K.
name: Ebert, D.
name: Nagy, M.
Publisher: name: arXiv
Year: 1997
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: A chiral SU(2) x SU(2) Lagrangian containing, besides the usual meson fields, their first radial excitations is considered. The Lagrangian is derived by bosonization of the Nambu-Jona-Lasinio quark model with separable non-local interactions, with form factors corresponding to 3-dimensional ground and excited state wave functions. The spontaneous breaking of chiral symmetry is governed by the NJL gap equation. The first radial excitations of the pions, rho-and omega-mesons are described with the help of two form factors. The weak decay constant F_pi' is calculated. The values for the decay widths of the processes rho -> 2 pi, pi' -> rho pi, rho' -> 2 pi, rho' -> omega pi and omega' -> rho pi are obtained in agreement with the experimental data.
description: 16 pages, Latex, epsfig
title: Inspection schedule adjustments through Monte Carlo Analysis
Creators: name: SANCHEZ-LANTARON, Juan-Antonio
Publisher: name: Proceedings of the 8th European Conference for Aeronautics and Space Sciences. Madrid, Spain, 1-4 july 2019
Year: 2019
Subjects: TURBOMACHINES
MODEL IDENTIFICATION
SIMULATION
VERIFICATION AND VALIDATION

description: Once that an Aircraft family enters into service, a continuous monitoring of the fleet is performed to ensure its Airworthiness. Occasionally, this continuous monitoring reveals that certain equipment installed in the aircraft have failure modes governed by wear-out process, in which the failure rate increases with time. When these kinds of malfunctions are discovered, sometimes is necessary to impose periodic inspections until the defect is removed. The objective of this study is to show the benefits of using the Monte Carlo analysis to adjust the inspection schedule, keeping aircraft safety levels whilst the impact over the operators is minimized.
Additional file 1: of Single-dose versus 3-day cotrimoxazole prophylaxis in transurethral resection or greenlight laser vaporisation of the prostate: study protocol for a multicentre randomised placebo controlled non-inferiority trial (CITrUS trial)
Creators: name: Speich, Benjamin
name: Bausch, Kathrin
name: Roth, Jan
name: Hemkens, Lars
name: Ewald, Hannah
name: Vogt, Deborah
name: Bruni, Nicole
name: Deuster, Stefanie
name: Hans-H. Seifert
name: Widmer, Andreas
Publisher: name: figshare
Year: 2019
Subjects: subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Cell Biology
subject: Developmental Biology
subject: Cancer
subject: 110309 Infectious Diseases
subject: FOS: Health sciences
subject: Computational Biology

description: Clinical study protocol. (DOCX 638 kb)
Colpocephalum kelloggi Osborn 1902
Creators: name: Gonza ́ Lez-Acun, Daniel A.
name: Palma, Ricardo L.
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Psocodea
Menoponidae
Colpocephalum
Colpocephalum kelloggi

description: Colpocephalum kelloggi Osborn, 1902
 Colpocephalum kelloggi Osborn, 1902: 175, pl. 11: fig. 2.
 Ferrisia kelloggi (Osborn); Uchida 1926: 44.
 Colpocephalum kelloggi Osborn, 1902; Hopkins & Clay 1952: 80.
 Colpocephalum kelloggi Osborn, 1902; Emerson 1960: 156.
 Colpocephalum kelloggi Osborn, 1902; Price & Beer 1963a: 737, figs 1, 6.
 Colpocephalum kelloggi Osborn, 1902; Price et al. 2003: 99.
 Colpocephalum kelloggi Osborn, 1902; Moreno & González-Acuña 2015: 95.
 Colpocephalum kelloggi Osborn, 1902; González-Acuña & Moreno 2018: 262, fig. 3-19.
 Colpocephalum kelloggi [sic]; Gutiérrez-Garrido 2021: 19, figs 2–3.
Lectotype ♀ in OSUM (see Emerson 1960: 156).
 Type host: Cathartes aura septentrionalis Wiedemann, 1839.
 Chilean hosts: Cathartes aura jota (Molina, 1782); Coragyps atratus (Bechstein, 1793).
 Other hosts: Cathartes aura aura (Linnaeus, 1758); Cathartes aura meridionalis Swann, 1921; Cathartes burrovianus (Cassin, 1845); Cathartes melambrotus Wetmore, 1964.
Chilean localities: Coronel: Region VIII; Bulnes: Region XVI; San Carlos: Region XVI.
Geographic distribution: North, Central and South America.
Chilean references: Price & Beer (1963a: 738); Moreno & González-Acuña (2015); González-Acuña & Moreno (2018); Gutiérrez-Garrido (2021); this catalogue.
 Other significant references: Emerson (1960); Price et al. (2003); Galloway et al. (2014: 148).
 Remarks: Price & Beer (1963a: 738) questioned the correctness of the host data—given as Coragyps atratus —of the Colpocephalum kelloggi sample that they examined from Chile; however, Gutiérrez-Garrido (2021: 19) collected 19 specimens of C. kelloggi from one Coragyps atratus in Chile. In addition, the NHML collection holds four specimens of C. kelloggi from Cathartes aura jota collected in Chile, without specific localities (Shchedrina et al. 2017).
description: Published as part of Gonza ́ Lez-Acun, Daniel A. & Palma, Ricardo L., 2021, An annotated catalogue of bird lice (Insecta: Phthiraptera) from Chile, pp. 1-151 in Zootaxa 5077 (1) on page 19, DOI: 10.11646/zootaxa.5077.1.1, http://zenodo.org/record/5766642
Optical absorption spectra and geometric effects in higher fullerenes
Creators: name: Harigaya, Kikuo
Publisher: name: arXiv
Year: 1996
Subjects: subject: Condensed Matter (cond-mat)
subject: Chemical Physics (physics.chem-ph)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The optical excitations in $\rug$ and higher fullerenes, including isomers of C$_{76}$, C$_{78}$, and C$_{84}$, are theoretically investigated. We use a tight binding model with long-range Coulomb interactions, treated by the Hartree-Fock and configuration-interaction methods. We find that the optical excitations in the energy region smaller than about 4 eV have most of their amplitudes at the pentagons. The oscillator strengths of projected absorption almost accord with those of the total absorption. When the projection is performed on each pentagon and pentagon dimers, the resultant spectrum in the low energy region is quite different from that of the total absorption. The spectral shapes of the total absorption are turned out to be determined mainly by the geometrical distributions of the pentagons in the fullerene structures.
Dynamical evolution of electromagnetic perturbation in the background of a scalar hairy black hole in Horndeski theory
Creators: name: Fang, Qiong
name: Chen, Songbai
name: Jing, Jiliang
Publisher: name: arXiv
Year: 2018
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We have investigated dynamical evolution of electromagnetic perturbation in a scalar hairy black hole spacetime, which belongs to solutions in Horndeski theory with a logarithmic cubic term. Our results show that the parameter $α$ affects the existence of event horizon and modifies the asymptotical structure of spacetime at spatial infinity, which imprints on the quasinormal frequency of electromagnetic perturbation. Moreover, we find that the late-time tail of electromagnetic perturbation in this background depends also on the parameter $α$ due to the existence of solid angle deficit. The presence of the parameter $α$ makes the perturbation field decay more rapidly. These imply that the spacetime properties arising from the logarithmic cubic term in the action play important roles in the dynamical evolutions of the electromagnetic perturbation in the background of a scalar hairy black hole.
description: 13 pages, 4 figures, numerical method and precision for qnm is improved and the main result is unchanged
title: A Combined Experimental and Computational Study of Jet Engine Combustion Baseline Engine Operation
Creators: name: DANEL, K.
name: ZETTERVALL, N.
name: CARLSSON, T.E.
name: FUREBY, C.
Publisher: name: Proceedings of the 8th European Conference for Aeronautics and Space Sciences. Madrid, Spain, 1-4 july 2019
Year: 2019
Subjects: AIRCRAFT PROPULSION
COMBUSTION
SIMULATION
DIAGNOSTICS

description: In this investigation, we present results from combined jet-engine experiments in a recently developed facility, and numerical simulation results of the same jet engine using finite rate chemistry Large Eddy Simulation (LES) based on a recently developed skeletal mechanism for kerosene-air combustion. Both the experimental data and computational results reveal that this operating condition is a stable condition not experiencing any drift in the engine performance parameters or any thermoacoustic instabilities. The outlet temperature shows notable temporal and azimuthal variations reflecting the unsteady combustion and the number and location of the spray flames. The time- and area averaged outlet combustor temperature is in good agreement with the experimentally assessed global outlet temperature of the experiments. Furthermore, an FFT analysis of the predicted combustor pressure shows that the frequencies are grouped around three main frequencies centered at 540 Hz, 1120 Hz and 1735 Hz. This compares favorably with the corresponding experimental data of both the measured combustor pressure and the combustor light intensity emissions, having frequency peaks centered around 693 Hz, 1114 Hz. and 1792 Hz, respectively.
title: The numerical and experimental studies on the over-wing-engine configurations aerodynamics
Creators: name: BOLSUNOVSKY, A.L.
name: BUZOVERYA, N.P.
name: CHERNYSHEV, I.L.
name: CHERNY, K.I.
name: PUSHCHIN, N.A.
Publisher: name: Proceedings of the 8th European Conference for Aeronautics and Space Sciences. Madrid, Spain, 1-4 july 2019
Year: 2019
Subjects: AERODYNAMICS
NOISE REDUCTION
WIND TUNNEL

description: Environmental requirements, such as community noise and emission limits will play an ever increasing role in the foreseen future of the civil aviation. Options are limited for reducing noise from the current configuration, hence new radical green designs may be required to meet the severe nextgeneration aircraft targets, claimed at present by NASA, ACARE and other organizations. Engine noise is one of the most dominant factors of the whole aircraft noise. While current trend of an increase in by pass ratio leads to the noise reduction by itself, possibility to accommodate large engines under wing are restricted. An over-wing-engine mounting can both help to solve this problem and further reduce the community noise due to the shielding effect. TsAGI carries out systematic investigations on the \"silent\" aircraft with engine noise shielding by the airframe parts. Various configurations with different engine arrangement and propulsion system architecture have been studied. A description of the aerodynamic peculiarities of an each scheme alongside with the details of aerodynamic design procedure is given in this paper. Selected results of the experimental studies are presented.
A block preconditioner for non-isothermal flow in porous media
Creators: name: Roy, Thomas
name: Jönsthövel, Tom B.
name: Lemon, Christopher
name: Wathen, Andrew J.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Numerical Analysis (math.NA)
subject: Computational Physics (physics.comp-ph)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 65F08, 65F10, 76S05, 65M08, 65M60

description: In petroleum reservoir simulation, the industry standard preconditioner, the constrained pressure residual method (CPR), is a two-stage process which involves solving a restricted pressure system with Algebraic Multigrid (AMG). Initially designed for isothermal models, this approach is often used in the thermal case. However, it does not have a specific treatment of the additional energy conservation equation and temperature variable. We seek to develop preconditioners which better capture thermal effects such as heat diffusion. In order to study the effects of both pressure and temperature on fluid and heat flow, we consider a model of non-isothermal single phase flow through porous media. For this model, we develop a block preconditioner with an efficient Schur complement approximation. Both the pressure block and the approximate Schur complement are approximately inverted using an AMG V-cycle. The resulting solver is scalable with respect to problem size and parallelization.
description: 35 pages, 3 figures
title: Numerical Simulation of Pitch-Damping Dynamic Derivatives
Creators: name: MA, Yuanhong
name: LV, Meng
name: SU, Cheng
Publisher: name: Proceedings of the 8th European Conference for Aeronautics and Space Sciences. Madrid, Spain, 1-4 july 2019
Year: 2019
Subjects: AERODYNAMICS
CFD
NUMERICAL SIMULATION

description: The dynamic derivatives are used to describe the dynamic aerodynamic characteristics of flight vehicles when the maneuvering flight is disturbed, it is important in flight vehicles\' design and dynamic characteristics analysis. The equations of forced oscillation and forced plunging motion of flight vehicles, and the expressions for calculating the identification of pitch-damping dynamic derivatives were derived. We simulated pitching and plunging of NACA0012 airfoil and basic finner missile. The results of simulation are consistent with the references.
An intrinsic flat limit of Riemannian manifolds with no geodesics
Creators: name: Basilio, Jorge
name: Kazaras, Demetre
name: Sormani, Christina
Publisher: name: arXiv
Year: 2018
Subjects: subject: Differential Geometry (math.DG)
subject: Metric Geometry (math.MG)
subject: FOS: Mathematics
subject: 53

description: In this paper we produce a sequence of Riemannian manifolds $M_j^m$, $m \ge 2$, which converge in the intrinsic flat sense to the unit $m$-sphere with the restricted Euclidean distance. This limit space has no geodesics achieving the distances between points, exhibiting previously unknown behavior of intrinsic flat limits. In contrast, any compact Gromov-Hausdorff limit of a sequence of Riemannian manifolds is a geodesic space. Moreover, if $m\geq3$, the manifolds $M_j^m$ may be chosen to have positive scalar curvature.
description: 21 pages, 3 figures, comments welcome
Application of the Fast Multipole Fully Coupled Poroelastic Displacement Discontinuity Method to Hydraulic Fracturing Problems
Creators: name: Rezaei, Ali
name: Siddiqui, Fahd
name: Bornia, Giorgio
name: Soliman, Mohamed Y.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Numerical Analysis (math.NA)
subject: Computational Engineering, Finance, and Science (cs.CE)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences

description: In this study, a fast multipole method (FMM) is used to decrease the computational time of a fully-coupled poroelastic hydraulic fracture model with a controllable effect on its accuracy. The hydraulic fracture model is based on the poroelastic formulation of the displacement discontinuity method (DDM) which is a special formulation of the boundary element method (BEM). DDM is a powerful and efficient method for problems involving fractures. However, this method becomes slow as the number of temporal, or spatial elements increases, or necessary details such as poroelasticity, that makes the solution history-dependent, are added to the model. FMM is a technique to expedite matrix-vector multiplications within a controllable error without forming the matrix explicitly. Fully-coupled poroelastic formulation of DDM involves the multiplication of a dense matrix with a vector in several places. A crucial modification to DDM is suggested in two places in the algorithm to leverage the speed efficiency of FMM for carrying out these multiplications. The first modification is in the time-marching scheme, which accounts for the solution of previous time steps to compute the current time step. The second modification is in the generalized minimal residual method (GMRES) to iteratively solve for the problem unknowns. Several examples are provided to show the efficiency of the proposed approach in problems with large degrees of freedom (in time and space). Examples include hydraulic fracturing of a horizontal well and randomly distributed pressurized fractures at different orientations with respect to horizontal stresses. The results are compared to the conventional DDM in terms of computational processing time and accuracy. Accordingly, the proposed algorithm may be used for fracture propagation studies while substantially reducing the processing time with a controllable error.
Colpocephalum megalopteri Price 1967
Creators: name: Gonza ́ Lez-Acun, Daniel A.
name: Palma, Ricardo L.
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Psocodea
Menoponidae
Colpocephalum
Colpocephalum megalopteri

description: Colpocephalum megalopteri Price, 1967
 Colpocephalum megalopteri Price, 1967b: 319, figs 1–3.
 Aquiligogus megalopterus (Price, 1967); Mey & González-Acuña 2000: 67. Invalid emendation. Colpocephalum megalopteri Price, 1967; González-Acuña et al. 2008a: 283.
 Colpocephalum megalopteri Price, 1967; Moreno & González-Acuña 2015: 95.
 Colpocephalum megalopteri Price, 1967; González-Acuña & Moreno 2018: 262.
Holotype ♀ in USNM.
 Type host: Phalcoboenus megalopterus (Meyen, 1834).
 Chilean host: Phalcoboenus megalopterus (Meyen, 1834).
Other hosts: None.
Chilean locality: Talagante: Region RM.
Geographic distribution: South America.
 Chilean references: Mey & González-Acuña (2000); González-Acuña et al. (2008a); Moreno & González-Acuña (2015); González-Acuña & Moreno (2018).
 Other significant references: Price et al. (2003: 100).
 Remarks: As stated in the Methods and conventions above, we follow the taxonomy used by Price et al. (2003); therefore, we regard the genus Aquiligogus as a junior synonym of Colpocephalum.
description: Published as part of Gonza ́ Lez-Acun, Daniel A. & Palma, Ricardo L., 2021, An annotated catalogue of bird lice (Insecta: Phthiraptera) from Chile, pp. 1-151 in Zootaxa 5077 (1) on pages 20-21, DOI: 10.11646/zootaxa.5077.1.1, http://zenodo.org/record/5766642
title: Combustion Modeling in Solid Rocket Motor Plumes
Creators: name: ECKER, Tobias
name: KARL, Sebastian
name: HANNEMANN, Klaus
Publisher: name: Proceedings of the 8th European Conference for Aeronautics and Space Sciences. Madrid, Spain, 1-4 july 2019
Year: 2019
Subjects: COMBUSTION
PLUMES
SOLID PROPELLANTS

description: The thermo-chemistry of plumes emanating from solid rocket motors (SRM) is strongly influenced by hydrogen/oxygen/chlorine chemistry. These after-burning reactions have a significant impact onto the infrared signature, as well as on chemical and thermal loads within the propulsion system. This study provides an overview on available combustion mechanism and evaluate their applicability to CFD. Based on the results an improved skeletal kinetic model is proposed and validated against detailed mechanisms. The results of this study offer an evaluation of the performance of current finite rate chemistry models and the impact on flowfield characteristics of SRM plumes.
Bioactivity of Macaranga bancana And Macaranga tanarius Leaves from Bukit Kiara Hill Walk, Malaysia.
Creators: name: JAYASIMHAN, VIVEK
Publisher: name: Monash University
Year: 2024
Subjects: classificationCode: 410401
subject: Conservation and biodiversity
classificationCode: 340502
subject: Natural products and bioactive compounds

description: This study investigates the medicinal properties of two tropical trees, Macaranga bancana and Macaranga tanarius, commonly used in Malaysian and Thai traditional medicine. Testing their methanolic extracts revealed that M. tanarius exhibits potent antioxidant effects, combating free radicals and oxidative stress, while M. bancana shows promise in preventing harmful reactive oxygen species formation. M. tanarius also demonstrates antimicrobial potential against certain Gram-positive bacteria. Furthermore, the study identified new chemical compounds in both trees, providing valuable insights into their chemical makeup for the first time. Overall, this research highlights the therapeutic potential of these tropical trees in natural medicine.
Lorentz Transformations as Lie-Poisson Symmetries
Creators: name: Simoni, A.
name: Stern, A.
name: Yakushin, I.
Publisher: name: arXiv
Year: 1995
Subjects: subject: Quantum Algebra (math.QA)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: We write down the Poisson structure for a relativistic particle where the Lorentz group does not act canonically, but instead as a Poisson-Lie group. In so doing we obtain the classical limit of a particle moving on a noncommutative space possessing $SL_q(2,C)$ invariance. We show that if the standard mass shell constraint is chosen for the Hamiltonian function, then the particle interacts with the space-time. We solve for the trajectory and find that it originates and terminates at singularities.
description: 18 pages
Nonlocal Cosmology II --- Cosmic acceleration without fine tuning or dark energy
Creators: name: Deser, S.
name: Woodard, R. P.
Publisher: name: arXiv
Year: 2019
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present an improved version of our original cosmological model to explain the current phase of cosmological acceleration without resorting to a cosmological constant or any other mass scale. Like the original, this phenomenological approach is based on an effective quantum gravitational action, but now depends on the original nonlocal dimensionless scalar $X = \square^{-1} R$ only through $Y = \square^{-1} g^{μν} X_{,μ} X_{,ν}$. Both $X$ and $Y$ are quiescent during the radiation-dominated ($R=0$) era, both only grow logarithmically during matter dominance, and neither affects the propagation of gravitational radiation. However, while $X$ has the same sign for gravitationally bound systems as for cosmology, we show that the sign of $Y$ differs for the two cases: it is positive for cosmology and negative for strongly gravitationally bound systems. We can therefore enforce the $Λ$CDM expansion history by making a suitable choice of the nonlocal distortion function $f(Y)$ for $Y > 0$, while ensuring that there is no change in the heavily constrained solar system phenomenology simply by making $f$ vanish for $Y < 0$ without discontinuity. The required $f(Y>0)$ is determined numerically to have a strikingly simple exponential form.
description: 18 pages, 4 figures, uses LaTeX2e version 2 revised for publication
Assessment of Leadership Role of Principals of Technical College in The North –East Political Zone of Nigeria
Creators: name: Watsai Y. Ndirpaya, Mustapha M. Kime, Mustapha Mukhtar
Publisher: name: Zenodo
Year: 2024

description: This study was embarked upon, for the purpose of assessment of leadership role of Technical Colleges in the North-East geopolitical zone of Nigeria. In carrying out the study, four research questions were formulated. The questionnaire was the only instrument used for data collection. Principals of fifteen (15) Technical Colleges in the North-East geopolitical zone of Nigeria and Technical Teachers were chosen as the population of the study. There was no sampling for study, since according to research experts, the population is sizeable for the study and could be studied in its entirety. The results of the data collected and analyzed,showedthat the principals of Technical Colleges in the study areas, need to exercise authority in administration of staff and students to ensure optimum use of human resources in school organization.
Spin-lattice relaxation in the mixed state of the high-$T_c$ cuprates: electronic spin-flip scattering versus spin-fluctuations
Creators: name: Morr, Dirk K.
Publisher: name: arXiv
Year: 2000
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Recent experimental and theoretical studies have established that the spin-lattice relaxation rate, $1/T_1$, measured in nuclear magnetic resonance (NMR) experiments is a site-sensitive probe for the electronic spectrum in the mixed state of the high-$T_c$ cuprates. While some groups suggested that $1/T_1$ is solely determined by spin-flip scattering of BCS-like electrons, other groups stressed the importance of antiferromagnetic spin-fluctuations. We show that these two relaxation mechanisms give rise to a {\it qualitatively} different temperature and frequency dependence of $^{17}$O $1/T_1$. A comparison of our results with the experimental $^{17}$O $1/T_1$ data provides support for a relaxation mechanism dominated by antiferromagnetic spin-fluctuations.
description: 6 pages, 5 figures
Exact analytical solutions in two dimensional plate-like mechanical metamaterials: State of free deformation in a topological cylinder
Creators: name: Klein, JT
name: Karpov, Eduard
Publisher: name: University of Illinois at Chicago
Year: 2021
Subjects: subject: Mechanical Engineering
subject: FOS: Mechanical engineering

description: Nodal displacements for two dimensional plate-like lattices under static loading are solved in exact analytical form, when periodic boundary conditions are applied to the top and bottom surfaces of the lattice forming a topological cylinder. Discrete Fourier transform converts the governing equation of static equilibrium into a set of one dimensional wavenumber dependent problems. Characteristic solutions are developed for each Fourier mode of deformation. Inverse discrete Fourier transform converts the wavenumber domain function back to the spatial domain by taking a linear combination of the one dimensional harmonic solutions. As an example, the point force is decomposed into a set of wavenumber dependent loading profiles. A linear combination of the displacement solutions for the individual harmonic loading profiles is sufficient to reproduce the overall displacement solution for the point load. This property holds for any type of the load. Nodal displacements, expressed with analytical dependence on the nodal indices n and m, match the results of commercial finite element analysis software. Overall, this paper demonstrates that the static response of discrete lattices is equivalently represented as a superposition of the wavenumber domain solutions, which is analogous to frequency domain analysis in acoustic metamaterials and phononics.
Single Cooper pair tunneling induced by non-classical microwaves
Creators: name: Odintsov, A. A.
name: Vourdas, A.
Publisher: name: arXiv
Year: 1996
Subjects: subject: Condensed Matter (cond-mat)
subject: FOS: Physical sciences

description: A mesoscopic Josephson junction interacting with a mode of non-classical microwaves with frequency $ω$ is considered. Squeezing of the electromagnetic field drastically affects the dynamics of Cooper tunneling. In particular, Bloch steps can be observed even when the microwaves are in the squeezed vacuum state with {\em zero} average amplitude of the field $\langle E(t) \rangle = 0$. The interval between these steps is double in size in comparison to the conventional Bloch steps.
description: 8 pages, 2 figures are available upon request to: odintsov@duttntn.tn.tudelft.nl
Colpocephalum strangei Price 1966
Creators: name: Gonza ́ Lez-Acun, Daniel A.
name: Palma, Ricardo L.
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Psocodea
Menoponidae
Colpocephalum
Colpocephalum strangei

description: Colpocephalum strangei Price, 1966 New record
 Colpocephalum strangei Price, 1966: 317, figs 1–4, 6, 8.
 Colpocephalum strangei Price, 1966; Price 1967b: 317.
 Aquiligogus strangei (Price, 1966); Mey & González-Acuña 2000: 68.
 Colpocephalum strangei Price, 1966; Price et al. 2003: 102.
Holotype ♀ in NHML.
 Type host: Phalcoboenus australis (Gmelin, 1788).
 Chilean host: Phalcoboenus australis (Gmelin, 1788).
Other hosts: None.
Chilean locality: Isla Gonzalo (Diego Ramírez Islands): Region XII.
Geographic distribution: Falkland Islands, Tierra del Fuego and surrounding islands.
Chilean reference: This catalogue.
 Other significant references: Price (1967b); Price et al. (2003).
 Remarks: This is the first record of Colpocephalum strangei from Chile, based on two samples from Phalcoboenus australis held in MONZ.
description: Published as part of Gonza ́ Lez-Acun, Daniel A. & Palma, Ricardo L., 2021, An annotated catalogue of bird lice (Insecta: Phthiraptera) from Chile, pp. 1-151 in Zootaxa 5077 (1) on pages 21-22, DOI: 10.11646/zootaxa.5077.1.1, http://zenodo.org/record/5766642
Additional file 3: of Purification and characterization of actinomycins from Streptomyces strain M7 active against methicillin resistant Staphylococcus aureus and vancomycin resistant Enterococcus
Creators: name: Sharma, Manish
name: Manhas, Rajesh
Publisher: name: figshare
Year: 2019
Subjects: subject: Biophysics
subject: Biochemistry
subject: Microbiology
subject: FOS: Biological sciences
subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Hematology
subject: 110309 Infectious Diseases
subject: FOS: Health sciences

description: Figure S4 (a-d): 1H NMR spectra of purified Actinomycin V (P1). Figure S5 (a-f): 1H NMR spectra of purified Actinomycin X2 (P2). Figure S6 (a-g): 1H NMR spectra of purified Actinomycin D (P3). (DOCX 1407 kb)
A Dynamical Scheme for a Large CP-Violating Phase
Creators: name: Delepine, D.
name: Gerard, J. -M.
name: Felipe, R. Gonzalez
name: Weyers, J.
Publisher: name: arXiv
Year: 1997
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: A dynamical scheme where the third generation of quarks plays a distinctive role is implemented. New interactions with a $θ$ term induce the breaking of the electroweak symmetry and the top-bottom mass splitting. A large CP-violating phase naturally follows from the latter.
description: 10 pages, LaTeX
Colpocephalum subzerafae Tendeiro 1988
Creators: name: Gonza ́ Lez-Acun, Daniel A.
name: Palma, Ricardo L.
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Psocodea
Menoponidae
Colpocephalum
Colpocephalum subzerafae

description: Colpocephalum subzerafae Tendeiro, 1988
 Colpocephalum zerafae Ansari,?1955 sen. lat. Price & Beer 1963a: 758, fig. 55. In part.
 Colpocephalum subzerafae subzerafae Tendeiro, 1988: 88, figs 4–6, 16–19.
 Colpocephalum subzerafae Tendeiro, 1988; Price et al. 2003: 102.
 Colpocephalum subzerafae Tendeiro, 1988; González-Acuña et al. 2011b: 189.
 Colpocephalum subzerafae Tendeiro, 1988; Moreno & González-Acuña 2015: 95.
 Colpocephalum subzerafae Tendeiro, 1988; Palma 2017: 58.
 Colpocephalum subzerafae Tendeiro, 1988; González-Acuña & Moreno 2018: 262, fig. 3-19.
Holotype ♂ in NHML.
 Type host: Falco naumanni naumanni Fleischer, 1818.
 Chilean host: Falco sparverius cinnamonimus Swainson, 1838.
 Other hosts: Falco amurensis Radde, 1863; Falco biarmicus abyssinicus Neumann, 1904; Falco cenchroides Vigors & Horsfield, 1827; Falco columbarius Linneaus, 1758; Falco concolor Temminck, 1825; Falco peregrinus Tunstall, 1771; Falco rupicoloides Smith, 1829; Falco tinnunculus Linnaeus, 1758; Falco vespertinus Linnaeus, 1766 (see Price et al. 2003: 102).
Chilean localities: Isla Robinson Crusoe (= Masatierra) (Juan Fernández Islands): Region V; Chillán: Region XVI.
Geographic distribution: All continents, except Antarctica.
 Chilean references: Price & Beer (1963a: 759); González-Acuña et al. (2011b); Moreno & González-Acuña (2015); González-Acuña & Moreno (2018).
 Other significant references: Palma (1996: 122); Price et al. (2003); Palma (2017).
 Remarks: Price & Beer (1963a: 759) identified as Colpocephalum zerafae the material ex Falco peregrinus from Chile. However, since C. subzerafae had not been described at the time, further examination of that material is needed to confirm such identification (see also under Colpocephalum zerafae below).
description: Published as part of Gonza ́ Lez-Acun, Daniel A. & Palma, Ricardo L., 2021, An annotated catalogue of bird lice (Insecta: Phthiraptera) from Chile, pp. 1-151 in Zootaxa 5077 (1) on page 22, DOI: 10.11646/zootaxa.5077.1.1, http://zenodo.org/record/5766642
Testrun results from prototype fiber detectors for high rate particle tracking
Creators: name: Aschenauer, E. C.
name: Baehr, J.
name: Gapienko, V.
name: Hoffmann, B.
name: Luedecke, H.
name: Menchikov, A.
name: Mertens, C.
name: Nahnhauer, R.
name: Shanidze, R.
Publisher: name: arXiv
Year: 1998
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: A fiber detector concept has been realized allowing to registrate particles within less than 100 nsec with a space point precision of about 0.1 mm at low occupancy. Three full size prototypes have been build by different producers and tested at a 3 GeV electron beam at DESY. After 3 m of light guides 8-10 photoelectrons were registrated by multichannel photomultipliers providing an efficiency of more than 99%. Using all available data a resolution of 0.086 mm was measured.
description: 18 pages, 17 figures
Renarration for All
Creators: name: Dinesh, T. B.
name: Uskudarli, S.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: Computers and Society (cs.CY)
subject: FOS: Computer and information sciences

description: The accessibility of content for all has been a key goal of the Web since its conception. However, true accessibility -- access to relevant content in the global context -- has been elusive for reasons that extend beyond physical accessibility issues. Among them are the spoken languages, literacy levels, expertise, and culture. These issues are highly significant, since information may not reach those who are the most in need of it. For example, the minimum wage laws that are published in legalese on government sites and the low-literate and immigrant populations. While some organizations and volunteers work on bridging such gaps by creating and disseminating alternative versions of such content, Web scale solutions much be developed to take advantage of its distributed dissemination capabilities. This work examines content accessibility from the perspective of inclusiveness. For this purpose, a human in the loop approach for renarrating Web content is proposed, where a renarrator creates an alternative narrative of some Web content with the intent of extending its reach. A renarration relates some Web content with an alternative version by means of transformations like simplification, elaboration, translation, or production of audio and video material. This work presents a model and a basic architecture for supporting renarrations along with various scenarios. We also discuss the potentials of the W3C specification for Web Annotation Data Model towards a more inclusive and decentralized social web.