cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
title: ÐÐµÑ Ð°Ð½Ð¸ÐºÐ° ÑÐ°Ð·ÑÑÑÐµÐ½Ð¸Ñ. ÐÐ°Ð´Ð°ÑÐ° Ð­ÑÐµÐ»Ð±Ð¸
title: ÑÑÐµÐ±Ð½Ð¾Ðµ Ð¿Ð¾ÑÐ¾Ð±Ð¸Ðµ Ð´Ð»Ñ ÑÑÑÐ´ÐµÐ½ÑÐ¾Ð² Ð²ÑÑÑÐ¸Ñ ÑÑÐµÐ±Ð½ÑÑ Ð·Ð°Ð²ÐµÐ´ÐµÐ½Ð¸Ð¹, Ð¾Ð±ÑÑÐ°ÑÑÐ¸Ñ ÑÑ Ð¿Ð¾ Ð½Ð°Ð¿ÑÐ°Ð²Ð»ÐµÐ½Ð¸Ñ Ð¿Ð¾Ð´Ð³Ð¾ÑÐ¾Ð²ÐºÐ¸ Ð¼Ð°Ð³Ð¸ÑÑÑÐ¾Ð² Â«ÐÑÐ¸ÐºÐ»Ð°Ð´Ð½Ð°Ñ Ð¼ÐµÑ Ð°Ð½Ð¸ÐºÐ°Â»
titleType: Subtitle
Creators: name: Ð¤ÑÐµÐ¹Ð´Ð¸Ð½, ÐÐ»ÐµÐºÑÐ°Ð½Ð´Ñ
Publisher: name: ÐÐ·Ð´-Ð²Ð¾ ÐÐ¾Ð»Ð¸ÑÐµÑÐ½. ÑÐ½-ÑÐ°
Year: 2010
Subjects: Ð Ð°Ð·ÑÑÑÐµÐ½Ð¸Ñ ÑÐµÐ¾ÑÐ¸Ñ

description: ÐÐ¾ÑÐ²ÑÑÐµÐ½Ð¾ Ð·Ð°Ð´Ð°ÑÐµ Ð­ÑÐµÐ»Ð±Ð¸ ÐºÐ°Ðº Ð±Ð°Ð·Ð¾Ð²Ð¾Ð¹ Ð·Ð°Ð´Ð°ÑÐµ Ð¼ÐµÑÐ°Ð½Ð¸ÐºÐ¸ Ð½ÐµÐ¾Ð´Ð½Ð¾ÑÐ¾Ð´Ð½ÑÑ ÑÑÐµÐ´, Ð²ÐºÐ»ÑÑÐ°ÑÑÐµÐ¹ Ð¼ÐµÑÐ°Ð½Ð¸ÐºÑ Ð´ÐµÑÐ¾ÑÐ¼Ð¸ÑÐ¾Ð²Ð°Ð½Ð¸Ñ Ð¸ ÑÐ°Ð·ÑÑÑÐµÐ½Ð¸Ñ ÐºÐ¾Ð¼Ð¿Ð¾Ð·Ð¸ÑÐ½ÑÑ Ð¼Ð°ÑÐµÑÐ¸Ð°Ð»Ð¾Ð² Ð¸ Ð¼ÐµÑÐ°Ð½Ð¸ÐºÑ Ð´ÐµÑÐ¾ÑÐ¼Ð¸ÑÑÐµÐ¼ÑÑ Ð¼Ð°ÑÐµÑÐ¸Ð°Ð»Ð¾Ð², Ð¿ÑÐµÑÐµÑÐ¿ÐµÐ²Ð°ÑÑÐ¸Ñ ÑÐ°Ð·Ð¾Ð²ÑÐµ (ÑÑÑÑÐºÑÑÑÐ½ÑÐµ) Ð¿ÑÐµÐ²ÑÐ°ÑÐµÐ½Ð¸Ñ. ÐÑÐµÐ´Ð½Ð°Ð·Ð½Ð°ÑÐµÐ½Ð¾ Ð´Ð»Ñ ÑÑÑÐ´ÐµÐ½ÑÐ¾Ð² Ð²ÑÑÑÐ¸Ñ ÑÑÐµÐ±Ð½ÑÑ Ð·Ð°Ð²ÐµÐ´ÐµÐ½Ð¸Ð¹, Ð¾Ð±ÑÑÐ°ÑÑÐ¸ÑÂ­ÑÑ Ð¿Ð¾ Ð¼Ð°Ð³Ð¸ÑÑÐµÑÑÐºÐ¾Ð¹ Ð¿ÑÐ¾Ð³ÑÐ°Ð¼Ð¼Ðµ Â«ÐÑÑÐ¸ÑÐ»Ð¸ÑÐµÐ»ÑÐ½Ð°Ñ Ð¼ÐµÑÐ°Ð½Ð¸ÐºÐ° Ð¸ ÐºÐ¾Ð¼Ð¿ÑÑÑÐµÑÂ­Ð½ÑÐ¹ Ð¸Ð½Ð¶Ð¸Ð½Ð¸ÑÐ¸Ð½Ð³Â» Ð½Ð°Ð¿ÑÐ°Ð²Ð»ÐµÐ½Ð¸Ñ Ð¿Ð¾Ð´Ð³Ð¾ÑÐ¾Ð²ÐºÐ¸ Ð¼Ð°Ð³Ð¸ÑÑÑÐ¾Ð² Â«ÐÑÐ¸ÐºÐ»Ð°Ð´Ð½Ð°Ñ Ð¼ÐµÑÐ°Â­Ð½Ð¸ÐºÐ°Â». ÐÐ¾ÑÐ¾Ð±Ð¸Ðµ Ð¼Ð¾Ð¶ÐµÑ Ð±ÑÑÑ ÑÐ°ÐºÐ¶Ðµ Ð¿Ð¾Ð»ÐµÐ·Ð½ÑÐ¼ Ð¿ÑÐ¸ Ð¾Ð±ÑÑÐµÐ½Ð¸Ð¸ Ð¿Ð¾ Ð¼Ð°Ð³Ð¸ÑÑÐµÑÑÐºÐ¾Ð¹ Ð¿ÑÐ¾Ð³ÑÐ°Ð¼Ð¼Ðµ Â«ÐÐµÑÐ°Ð½Ð¸ÐºÐ° Ð´ÐµÑÐ¾ÑÐ¼Ð¸ÑÑÐµÐ¼Ð¾Ð³Ð¾ ÑÐ²ÐµÑÐ´Ð¾Ð³Ð¾ ÑÐµÐ»Ð°Â» Ð½Ð°Ð¿ÑÐ°Ð²Ð»ÐµÐ½Ð¸Ñ Ð¿Ð¾Ð´Â­Ð³Ð¾ÑÐ¾Ð²ÐºÐ¸ Ð¼Ð°Ð³Ð¸ÑÑÑÐ¾Ð² Â«ÐÐµÑÐ°Ð½Ð¸ÐºÐ° Ð¸ Ð¼Ð°ÑÐµÐ¼Ð°ÑÐ¸ÑÐµÑÐºÐ¾Ðµ Ð¼Ð¾Ð´ÐµÐ»Ð¸ÑÐ¾Ð²Ð°Ð½Ð¸ÐµÂ» Ð¸ Ð¿Ð¾ Ð´ÑÑÂ­Ð³Ð¸Ð¼ Ð½Ð°Ð¿ÑÐ°Ð²Ð»ÐµÐ½Ð¸ÑÐ¼ Ð¿Ð¾Ð´Ð³Ð¾ÑÐ¾Ð²ÐºÐ¸ ÑÐ¿ÐµÑÐ¸Ð°Ð»Ð¸ÑÑÐ¾Ð² Ð² Ð¾Ð±Ð»Ð°ÑÑÐ¸ Ð¼ÐµÑÐ°Ð½Ð¸ÐºÐ¸ Ð´ÐµÑÐ¾ÑÐ¼Ð¸Â­ÑÑÐµÐ¼Ð¾Ð³Ð¾ ÑÐ²ÐµÑÐ´Ð¾Ð³Ð¾ ÑÐµÐ»Ð° Ð¸ Ð¼Ð°ÑÐ¸Ð½Ð¾ÑÑÑÐ¾ÐµÐ½Ð¸Ñ. Ð Ð°Ð±Ð¾ÑÐ° Ð²ÑÐ¿Ð¾Ð»Ð½ÐµÐ½Ð° Ð² ÑÐ°Ð¼ÐºÐ°Ñ ÑÐµÐ°Ð»Ð¸Ð·Ð°ÑÐ¸Ð¸ Ð¿ÑÐ¾Ð³ÑÐ°Ð¼Ð¼Ñ ÑÐ°Ð·Ð²Ð¸ÑÐ¸Ñ.
description: ÐÐµÑÐ°ÑÐ°ÐµÑÑÑ Ð¿Ð¾ ÑÐµÑÐµÐ½Ð¸Ñ ÑÐµÐ´Ð°ÐºÑÐ¸Ð¾Ð½Ð½Ð¾-Ð¸Ð·Ð´Ð°ÑÐµÐ»ÑÑÐºÐ¾Ð³Ð¾ ÑÐ¾Ð²ÐµÑÐ° Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¾Ð³Ð¾ Ð³Ð¾ÑÑÐ´Ð°ÑÑÑÐ²ÐµÐ½Ð½Ð¾Ð³Ð¾ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¾Ð³Ð¾ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑÐ°.
High Temperature Resummation in the Linear $δ$-Expansion
Creators: name: Pinto, Marcus B.
name: Ramos, Rudnei O.
Publisher: name: arXiv
Year: 1999
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The optimized linear $δ$-expansion is applied to the $λϕ^4$ theory at high temperature. Using the imaginary time formalism the thermal mass is evaluated perturbatively up to order $δ^2$. A variational procedure associated with the method generates nonperturbative results which are used to obtain the critical temperature for the phase transition. Our results are compared with the ones given by propagator dressing methods.
description: 16 pages (2 eps figs,uses epsf), Revtex. Some misprints and errors in the Eqs corrected. New refs added. Version in press PRD
B meson form factors from HQET simulations
Creators: name: Bernard, C.
name: DeTar, C.
name: Gottlieb, Steven
name: Heller, U. M.
name: Hetrick, J.
name: Jegerlehner, B.
name: McNeile, C.
name: Rummukainen, K.
name: Sugar, R.
name: Toussaint, D.
name: Wingate, M.
Publisher: name: arXiv
Year: 1997
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We use simulations of heavy quark effective field theory to calculate the Isgur-Wise function, and we demonstrate the feasibility of calculating the matrix element for the $B \to π+ \leptons$ decay in the lattice heavy quark effective theory (HQET).
description: 3 pages, 2 figures, talk presented at the lattice 97 conference
$η^{\prime}\toηππ$ decays in unitarized resonance chiral theory
Creators: name: Gonzàlez-Solís, Sergi
name: Passemar, Emilie
Publisher: name: arXiv
Year: 2018
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We study the hadronic $η^{\prime}\toηππ$ decays within the framework of $U(3)_{L}\otimes U(3)_{R}$ Chiral Perturbation Theory including resonance states and the complete one-loop corrections. The amplitude is projected in partial waves and unitarized by means of the $N/D$ method resumming both the important $S$-and $D$-wave $ππ$ and the subleading $S$-wave $πη$ final-state interactions. The participating scalar multiplet mass and coupling strengths are determined from fits to the Dalitz plot experimental data recently released by the A2 collaboration. As a byproduct of our analysis, the associated Dalitz-plot slope parameters are found to be $a=-0.072(7)_{\rm{stat}}(8)_{\rm{syst}}\,, b=-0.052(1)_{\rm{stat}}(2)_{\rm{syst}}\,, d=-0.051(8)_{\rm{stat}}(6)_{\rm{syst}}$, which lie in the ballpark of the current experimental and theoretical determinations.
description: 45 pages, 12 figures
Vanishing viscosity plane parallel channel flow and related singular perturbation problems
Creators: name: Mazzucato, Anna
name: Taylor, Michael
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2008

description: We study a special class of solutions to the three-dimensional Navier-Stokes equations ∂ t u ν +∇ u ν u ν +∇p ν =νΔ u ν , with no-slip boundary condition, on a domain of the form Ω=(x,y,z):0≤z≤1, dealing with velocity fields of the form u ν (t,x,y,z)=(v ν (t,z),w ν (t,x,z),0), describing plane-parallel channel flows. We establish results on convergence u ν →u 0 as ν→0, where u 0 solves the associated Euler equations. These results go well beyond previously established L 2 -norm convergence, and provide a much more detailed picture of the nature of this convergence. Carrying out this analysis also leads naturally to consideration of related singular perturbation problems on bounded domains.
Role of phason-defects on the conductance of a 1-d quasicrystal
Creators: name: Moulopoulos, K.
name: Roche, S.
Publisher: name: arXiv
Year: 1995
Subjects: subject: Condensed Matter (cond-mat)
subject: FOS: Physical sciences

description: We have studied the influence of a particular kind of phason-defect on the Landauer resistance of a Fibonacci chain. Depending on parameters, we sometimes find the resistance to decrease upon introduction of defect or temperature, a behavior that also appears in real quasicrystalline materials. We demonstrate essential differences between a standard tight-binding model and a full continuous model. In the continuous case, we study the conductance in relation to the underlying chaotic map and its invariant. Close to conducting points, where the invariant vanishes, and in the majority of cases studied, the resistance is found to decrease upon introduction of a defect. Subtle interference effects between a sudden phason-change in the structure and the phase of the wavefunction are also found, and these give rise to resistive behaviors that produce exceedingly simple and regular patterns.
description: 12 pages, special macros jnl.tex,reforder.tex, eqnorder.tex. arXiv admin note: original tex thoroughly broken, figures missing. Modified so that tex compiles, original renamed .tex.orig in source.
QCDSP - A status report
Creators: name: QCDSP Collaboration
name: Chen, Dong
name: Chen, Ping
name: Christ, Norman H.
name: Edwards, Robert G.
name: Fleming, George R.
name: Gara, Alan
name: Hansen, Sten
name: Jung, Chulwoo
name: Kaehler, Adrian L.
name: Kennedy, Anthony D.
name: Kilcup, Gregory W.
name: Luo, Yubing
name: Malureanu, Catalin I.
name: Mawhinney, Robert D.
name: Parsons, John
name: Sexton, James C.
name: Sui, ChengZhong
name: Vranas, Pavlos M.
Publisher: name: arXiv
Year: 1997
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: The QCDSP machine at Columbia University has grown to 2,048 nodes achieving a peak speed of 100 Gigaflops. Software for quenched and Hybrid Monte Carlo (HMC) evolution schemes has been developed for staggered fermions, with support for Wilson and clover fermions under development. We provide an overview of the runtime environment, the current status of the QCDSP construction program and preliminary results not presented elsewhere in these proceedings.
description: 3 pages, 1 figure, LaTeX with espcrc2.sty, talk presented at LATTICE97(Poster) by G. R. Fleming
Burmeistera longifolia Gleason, Bull. Torrey Bot.
Creators: name: González, Favio
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Asterales
Campanulaceae
Burmeistera
Burmeistera longifolia

description: 28. Burmeistera longifolia Gleason, Bull. Torrey Bot. Club 52: 97. 1925.
 Type:— COLOMBIA. Córdoba: “In silva prope cascada Chorron, ad meridiem Antizalez”, 7–11 Feb 1922 (fl), 2400‒2700 m, F. Pennell 4399 (holotype: NY! [NY00467995]). Figs. 13F–G, 14.
Subshrubs up to 2 m tall. Stem puberulous. Petiole 5–8 mm long, puberulous; blade narrowly ovate, 6–11 × 1.8–3.6 cm, not falcate, glabrescent above, puberulous beneath, base cuneate to obtuse, apex acuminate, margin subentire to slightly toothed, with 1 or 2 marginal or slightly extramarginal hydathodes per cm, evenly distributed mainly along the distal half, secondary veins 6 or 7 pairs, intramarginal vein lacking. Subtending leaves reduced to 2.8 cm long. Peduncle 5–7 cm, glabrous, ebracteolate. Hypanthium obconic, 5–8 × 4–5 mm, puberulous. Calyx lobes oblong, 1.5–3.5 × 1–2 mm, patent to ascending, puberulous, basally spaced by sinuses 0.8‒1.2 mm wide, margin with one or two crenations per side, apex obtuse. Corolla yellowish-green, puberulous; tube 15–20 mm long, 3‒4 mm diameter at its mid-level, slightly inflated proximally; lobes oblong to broadly ovate, falcate, dorsal lobes 12–13 × 3.8–4.0 mm, lateral lobes 7.6–8.0 × 5–6 mm, ventral lobe 7.6–8.0 × 3.0– 3.2 mm. Synandrium 3.6–4.1 cm long, exserted up to 2 cm; filament tube 3.2–3.6 cm long, glabrescent; anther tube 4–5 mm long, sparsely puberulous at sutures, apex evenly villous, including the ebarbate ventral anthers. Berries subglobose, 2–3 × 1.5–2.6 cm, glabrous, greenish.
 Phenology: — Burmeistera longifolia has been collected with flowers and fruits in February, March, April, July, September and December.
 Distribution, ecology and conservation status: — Burmeistera longifolia is restricted to few localities of the northern ridges of the Western and Central cordilleras of Colombia, in the departments of Antioquia and Córdoba, at elevations between 1700 and 2700 m. Following the IUCN´s (2022) criteria [B1(EOO) and B2(AOO), conditions (a) and (b), and C2(a)(i)], B. longifolia qualifies as Critically Endangered.
 Note: — Burmeistera longifolia is similar to B. betancurii (see distinctive traits under the latter).
 Additional specimens examined:— Antioquia. Guatapé, vereda Santa Rita, 1850 m, 6 Dec 1984 (fl, fr), L . Albert et al. 4935 (HUA); Guatapé, vereda Santa Rita, 1850 m, 14 Mar 1985 (fl, fr), L . Albert et al. 4974 (HUA); Guatapé, vereda Santa Rita, 1850 m, 25 Apr 1985 (fl, fr), L . Albert et al. 5078 (HUA); Frontino, 2 km adelante del aeropuerto, 1700 m, 9 Jul 1984 (fl, fr), G . Lozano et al. 3956 (COL); Frontino, km 17 of road Nutibara-Murrí, 06°45´N, 76°24´W, 1750 m, 24 Sep 1987 (fl, fr), J . Zarucchi et al. 5727 (HUA).
description: Published as part of González, Favio, 2023, Taxonomic revision of Burmeistera (Campanulaceae-Lobelioideae) in Colombia, pp. 1-113 in Phytotaxa 615 (1) on page 59, DOI: 10.11646/phytotaxa.615.1.1, http://zenodo.org/record/8389205
Time-reversal odd fragmentation and distribution functions in pp and ep single spin asymmetries
Creators: name: Boglione, M.
name: Mulders, P. J.
Publisher: name: arXiv
Year: 1999
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present some estimates of T-odd fragmentation and distribution functions, $H_1^\perp$ and $f_{1T}^{\perp}$, evaluated on the basis of a fit on experimental data in p$^\uparrow$p. Assuming the T-odd fragmentation function to be responsible for the single spin asymmetry in pion production in p$^\uparrow$p, we find the ratio $H_1^{\perp}/D_1$ to be in good agreement with the experimental results from DELPHI data on Z -> 2$-jet decay. We use our estimates to make predictions for ep$^\uparrow$.
description: 15 pages, Latex, 7 Postscript figures
Asymptotic stability, ergodicity and other asymptotic properties of the nonlinear filter
Creators: name: The University of North Carolina at Chapel Hill University Libraries
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2003

description: In this work we study connections between various asymptotic properties of the nonlinear filter. It is assumed that the signal has a unique invariant probability measure. The key property of interest is expressed in terms of a relationship between the observation σ field and the tail σ field of the signal, in the stationary filtering problem. This property can be viewed as the permissibility of the interchange of the order of the operations of maximum and countable intersection for certain σ -fields. Under suitable conditions, it is shown that the above property is equivalent to various desirable properties of the filter such as (a) uniqueness of invariant measure for the signal, (b) uniqueness of invariant measure for the pair (signal, filter), (c) a finite memory property of the filter, (d) a property of finite time dependence between the signal and observation σ fields and (e) asymptotic stability of the filter. Previous works on the asymptotic stability of the filter for a variety of filtering models then identify a rich class of filtering problems for which the above equivalent properties hold.  2003 Éditions scientifiques et médicales Elsevier SAS
Disorder-sensitive node-like small gap in FeSe
Creators: name: Sun, Yue
name: Kittaka, Shunichiro
name: Nakamura, Shota
name: Sakakibara, Toshiro
name: Zhang, Peng
name: Shin, Shik
name: Irie, Koki
name: Nomoto, Takuya
name: Machida, Kazushige
name: Chen, Jingting
name: Tamegai, Tsuyoshi
Publisher: name: arXiv
Year: 2018
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We investigate the band structure, nematic state and superconducting gap structure of two selected FeSe single crystals containing different amount of disorder. Transport and angle-resolved photoemission spectroscopy measurements show that the small amount of disorder has little effect to the band structure and the nematic state of FeSe. However, temperature and magnetic field dependencies of specific heat for the two samples are quite different. Wave-vector-dependent gap structure are obtained from the three dimensional field-angle-resolved specific heat measurements. A small gap with two vertical-line nodes or gap minima along the $k_z$ direction is found only in the sample with higher quality. Such symmetry-unprotected nodes or gap minima are found to be smeared out by small amount of disorder, and the gap becomes isotropic in the sample of lower quality. Our study reveals that the reported controversy on the gap structure of FeSe is due to the disorder-sensitive node-like small gap.
description: 7 pages, 4 figures
The infrared behaviour of the static potential in perturbative QCD
Creators: name: Brambilla, N.
name: Pineda, A.
name: Soto, J.
name: Vairo, A.
Publisher: name: arXiv
Year: 1999
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The definition of the quark-antiquark static potential is given within an effective field theory framework. The leading infrared divergences of the static singlet potential in perturbation theory are explicitly calculated.
description: 4 pages, 2 postscript figures, uses revtex.sty
On surface properties of two-dimensional percolation clusters
Creators: name: de Queiroz, S L A
Publisher: name: arXiv
Year: 1995
Subjects: subject: Condensed Matter (cond-mat)
subject: FOS: Physical sciences

description: The two-dimensional site percolation problem is studied by transfer-matrix methods on finite-width strips with free boundary conditions. The relationship between correlation-length amplitudes and critical indices, predicted by conformal invariance, allows a very precise determination of the surface decay-of-correlations exponent, $η_s = 0.6664 \pm 0.0008$, consistent with the analytical value $η_s = 2/3$. It is found that a special transition does not occur in the case, corroborating earlier series results. At the ordinary transition, numerical estimates are consistent with the exact value $y_s = -1$ for the irrelevant exponent.
description: 8 pages, LaTeX with Institute of Physics macros, to appear in Journal of Physics A
Asymmetries in the Production of $Λ_c^+$ and $Λ_c^-$ Baryons in 500 GeV/c $π^-$ Nucleon Interactions
Creators: name: E791 Collaboration
Publisher: name: arXiv
Year: 2000
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We present a measurement of asymmetries in the production of $Λ_c^+$ and $Λ_c^-$ baryons in 500 GeV/c $π^-$--nucleon interactions from the E791 experiment at Fermilab. The asymmetries were measured as functions of Feynman x ($x_F$) and transverse momentum squared ($p_T^2$) using a sample of $1819 \pm 62$ $Λ_c$'s observed in the decay channel $Λ_c \to pK^-π^+$. We observe more $Λ_c^+$ than $Λ_c^-$ baryons, with an asymmetry of $(12.7\pm3.4\pm1.3) %$ independent of $x_F$ and $p_T^2$ in our kinematical range $(-0.1 < x_F < 0.6$ and $0.0 < p_T^2 < 8.0 (GeV/c)^2$). This $Λ_c$ asymmetry measurement is the first with data in both the positive and negative $x_F$ regions.
description: 11 pages, 3 figures, elsart style (included), LaTeX 2e
THAILAND "ASIA AND AFRICA PROGRAMME" STAKEHOLDER ENGAGEMENT STRATEGY 2020 - 2025
Creators: name: Cheah, Phaik Yeong
Publisher: name: Zenodo
Year: 2019
Subjects: community engagement, public engagement, ethics

description: The Thailand Asia and Africa Programme (AAP), otherwise known as the Mahidol Oxford Tropical Medicine Research Unit (MORU), was established in 1979 as a research collaboration between Mahidol University (Thailand) and the University of Oxford (UK), and core-funded by the UK’s Wellcome Trust. This document is the Thailand APP Stakeholder Engagement Strategy for 2020-2025.
title: ADCO, Cartulaire général de Cîteaux, dit de Jean de Cirey, (XVe siècle), tome VIII, Cart. 192 (11 H 77), 295 folios, f. 0247v
Creators: name: de la Côte d'Or, Archives départementales
name: Archives Départementales De La Côte-D'Or
name: Petot, Frédérique
name: Projet CBMA
name: CG21/F.PETOT/2012
name: Petot, Frédéric
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2020
Subjects: subject: cartulaire
subject: LaMOP
subject: Laboratoire de Médiévistique Occidentale de Paris
subject: Corpus Burgundiae Medii Aevi
subject: Chartes de la Bourgogne du Moyen Âge

description: Cartulaire général de Cîteaux, dit de Jean de Cirey, (XVe siècle), tome VIII, Archives départementales de la Côte-d'Or, Cart. 192 (11 H 77), 295 folios, f. 0247v, Numérisation en mode image.
description: Relation: http://www.cbma-project.eu/
description: Bibliographic citation: Cartulaire général de Cîteaux, dit de Jean de Cirey, (XVe siècle), tome VIII, Archives départementales de la Côte-d'Or, Cart. 192 (11 H 77), 295 folios, f. 0247v, in Projet CBMA - Corpus Burgundiae Medii Aevi [Ressource en ligne], https:// manuscrits.cbma-project.eu/
description: Provenance: https://www.geonames.org/3024876
description: Provenance: http://www.idref.fr/030974844/id
description: Provenance: https://catalogue.bnf.fr/ark:/12148/cb12228351v
description: Provenance: abbaye de Cîteaux
description: Provenance: http://www.wikidata.org/entity/Q843261
Topological quantum pump of strongly interacting fermions in coupled chains
Creators: name: van Voorden, Bart
name: Schoutens, Kareljan
Publisher: name: arXiv
Year: 2018
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We analyze a tight binding model of two coupled chains with strongly interacting fermions. Depending on the parameter $w$, the many body lowest energy band consists of either single particles or bound pairs. A topological quantum pump can be created by periodically varying the coupling strengths under adiabatic conditions. We numerically show that the single particles and bound pairs are pumped in opposite directions along topologically non-trivial paths. The exact quantization of the pumped charge can be expressed by a (many body) Chern number.
description: 19 pages, 10 figures, to be submitted to New Journal of Physics
Alan Astbury - Bibliography from ALAN ASTBURY. 27 November 1934 — 21 July 2014
Creators: name: Keeler, Richard K.
name: Lefebvre, Michel
Publisher: name: The Royal Society
Year: 2018
Subjects: subject: 20203 Particle Physics
subject: FOS: Physical sciences

description: Alan Astbury worked in the area of accelerator based subatomic physics. Increasing beam energies, intensities and types of available accelerated beams opened scientific windows to new phenomena throughout his career. Exploiting these new beams required new techniques and the use of the latest technology. Alan was always at the forefront of putting these components together into the experiments needed to confirm or reject the latest theoretical advances or clarify conflicting experimental observations. Following his PhD using the synchrocyclotron at University of Liverpool and a postdoctoral position at Berkeley, he became a staff member at the Rutherford Appleton Laboratory, where he played a central role in the successive experiments with the Nimrod proton synchrotron, the 26 GeV proton synchrotron at CERN and, perhaps most significantly, with the UA1 experiment at CERN that discovered the W and Z particles. Alan moved to Canada in 1983 and made enormous contributions to Canadian science. He was instrumental in building relationships between Canadian scientists and CERN, DESY and SLAC. As director of the Canadian Institute of Particle Physics and then director of the TRIUMF laboratory, he guided subatomic physics policy and planning for two decades. On the international scene, he was president of the International Union of Pure and Applied Physics.
Results for Quenched $B_K$ from JLQCD
Creators: name: JLQCD Collaboration
name: Aoki, S.
name: Fukugita, M.
name: Hashimoto, S.
name: Ishizuka, N.
name: Iwasaki, Y.
name: Kanaya, K.
name: Kuramashi, Y.
name: Okawa, M.
name: Ukawa, A.
name: Yoshié, T.
Publisher: name: arXiv
Year: 1997
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: A report is presented on our continued effort to elucidate the continuum limit of $B_K$ using the quenched Kogut-Susskind quark action. By adding to our previous simulations one more point at $β= 6.65$ employing a $56^3\times 96$ lattice, we now confirm the expected $O(a^2)$ behavior of $B_K$ with the Kogut-Susskind action. A simple continuum extrapolation quadratic in $a$ leads to $B_K$(NDR, 2 GeV) = 0.598(5). As our final value of $B_K$ in the continuum we present $B_K$(NDR, 2 GeV)=0.628(42), as obtained by a fit including an $α_{\bar{MS}}(1/a)^2$ term arising from the lattice-continuum matching with the one-loop renormalization.
description: 3 pages, Latex(espcrc2,epsf), 2 ps figures, Talk presented at Lattice 97, two important references added
Light Quark Physics with Dynamical Wilson Fermions
Creators: name: SESAM
name: collaborations, TkL
name: :
name: Hoeber, H.
name: Eicker, N.
name: Glässner, U.
name: Güsken, S.
name: Lacock, P.
name: Lippert, Th.
name: Ritzenhöfer, G.
name: Schilling, K.
name: Spitz, A.
name: Ueberholz, P.
name: Viehoff, J.
name: Giusti, L.
name: Martinelli, G.
name: Rapuano, F.
Publisher: name: arXiv
Year: 1997
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We present results for spectroscopy, quark masses and decay constants obtained from SESAM's and TkL's large statistics simulations of QCD with two dynamical Wilson fermions.
description: 3 pages; to appear in the proceedings of Lat.'97
GUIMesh: a tool to import STEP geometries into Geant4 via GDML
Creators: name: Pinto, Marco
name: Gonçalves, Patrícia
Publisher: name: arXiv
Year: 2018
Subjects: subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: Detailed radiation analysis of instruments flown in space is critical to ensure mission safety, often requiring the use of state-of-the-art particle transport simulation tools. Geant4 is one of the most powerful toolkits to simulate the interaction and the passage of particles through matter. This framework however, is not prepared to receive Standard for The Exchange of Product data (STEP) files, the most versatile Computer-Aided Design (CAD) format, as inputs requiring previous conversion to other formats. This, especially when the instruments have complex shapes, and/or a large number of volumes may lead to loss of detail and under or overestimation of the quantities under study. Though several solutions have been proposed to import complex geometries into Geant4, so far, only commercial options are available. In this paper we present a new tool, GUIMesh, that embeds FreeCAD libraries, an open-source CAD editor, to tessellate volumes, and convert them to Geometry Description Markup Language (GDML), a Geant4 readable format, in a straightforward way. Several degrees of freedom are given to the user regarding the mesh and choice of material. Different geometries were tested for p material definition, geometry and navigation errors, successfully validating the method used.
Possible Constraints on the Time Variation of the Fine Structure Constant from Cosmic Microwave Background Data
Creators: name: Hannestad, Steen
Publisher: name: arXiv
Year: 1998
Subjects: subject: Astrophysics (astro-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The formation of the cosmic microwave background radiation (CMBR) provides a very powerful probe of the early universe at the epoch of recombination. Specifically, it is possible to constrain the variation of fundamental physical constants in the early universe. We have calculated the effect of a varying electromagnetic coupling constant (α) on the CMBR and find that new satellite experiments should provide a tight constraint on the value of αat recombination which is complementary to existing constraints. An estimate of the obtainable precision is |\dotα/α| \leq 7 x 10^{-13} y^{-1} in a realistic experiment.
description: 5 pages, 3 postscript figures, matches version to appear in Phys. Rev. D
Optimal Rates of Convergence to Bayes Risk in Nonparametric Discrimination
Creators: name: Marron, James Stephen
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 1983

description: Consider the multiclassification (discrimination) problem with known prior probabilities and a multi-dimensional vector of observations. Assume the underlying densities corresponding to the various classes are unknown but a training sample of size $N$ is available from each class. Rates of convergence to Bayes risk are investigated under smoothness conditions on the underlying densities of the type often seen in nonparametric density estimation. These rates can be drastically affected by a small change in the prior probabilities, so the error criterion used here is Bayes risk averaged (uniformly) over all prior probabilities. Then it is shown that a certain rate, $N^{-r}$, is optimal in the sense that no rule can do better (uniformly over the class of smooth densities) and a rule is exhibited which does that well. The optimal value of $r$ depends on the smoothness of the distributions and the dimensionality of the observations in the same way as for nonparametric density estimation with integrated square error loss.
Experimental Evidence for a Coulomb Gap in Two Dimensions
Creators: name: Mason, Whitney
name: Kravchenko, S. V.
name: Bowker, G. E.
name: Furneaux, J. E.
Publisher: name: arXiv
Year: 1995
Subjects: subject: Condensed Matter (cond-mat)
subject: FOS: Physical sciences

description: We have studied the resistivity, $ρ$, of a two-dimensional electron system in silicon in the temperature range 200 mK < T < 7.5 K at zero magnetic field at low electron densities, when the electron system is in the insulating regime. Our results show that at an intermediate temperature range $ρ=ρ_0 exp[(T_0/T)^{1/2}]$ for at least four orders of magnitude up to 3x10^9 Ohms. This behavior is consistent with the existence of a Coulomb gap. Near the metal/insulator transition, the prefactor was found to be close to $h/e^2$, and resistivity scales with temperature. For very low electron densities, $n_s$, the prefactor diminishes with diminishing $n_s$. A comparison with the theory shows that a specific set of conditions are necessary to observe the behavior of resistivity consistent with the existence of the Coulomb gap.
description: uuencoded compressed postscript-file (4 pages)
JOHN FINCH - Bibliography from JOHN THOMAS FINCH. 28 February 1930 — 5 December 2017
Creators: name: R. A. Crowther
name: K. C. Holmes
Publisher: name: The Royal Society
Year: 2018
Subjects: Structural Biology

description: John Finch was a gifted experimentalist who used X-ray crystallography and electron microscopy to elucidate the structures of important biological assemblies, particularly viruses and chromatin. When he started research in the 1950s, little was known about the structure of viruses, and the methods for investigating them were fairly limited. His early work on crystals of viruses was important in establishing their symmetry, and later with the electron microscope he mapped out the molecular structure of many virus coats. His observations on negatively stained preparations demonstrated that images of particles prepared in this way represented projections of fully stained embedded particles, not merely one-sided footprints. This was very relevant to the development of methods for making three-dimensional maps of specimens from electron micrographs. Later, besides further studies of viruses, he worked on many other systems, including chromatin, nucleosomes and tRNA. John was very much a team player and held an important place as the key experimentalist in many influential collaborations, investigating a diverse range of biological specimens.
Global invertibility of mappings between Banach spaces and applications to nonlinear equations
Creators: name: Galewski, Marek
name: Repovš, Dušan
Publisher: name: arXiv
Year: 2018
Subjects: subject: Functional Analysis (math.FA)
subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 57R50, 58E05

description: We provide sufficient conditions for a mapping between two Banach spaces to be a diffeomorphism using the approach of an auxiliary functional and also by the aid of a duality mapping corresponding to a normalization function. We simplify and generalize our previous results. Applications to algebraic equations and to integro-differential systems are also given.
Enhanced quantum coherence in exchange coupled spins via singlet-triplet transitions
Creators: name: Bae, Yujeong
name: Yang, Kai
name: Willke, Philip
name: Choi, Taeyoung
name: Heinrich, Andreas J.
name: Lutz, Christopher P.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Manipulation of spin states at the single-atom scale underlies spin-based quantum information processing and spintronic devices. Such applications require protection of the spin states against quantum decoherence due to interactions with the environment. While a single spin is easily disrupted, a coupled-spin system can resist decoherence by employing a subspace of states that is immune to magnetic field fluctuations. Here, we engineered the magnetic interactions between the electron spins of two spin-1/2 atoms to create a clock transition and thus enhance their spin coherence. To construct and electrically access the desired spin structures, we use atom manipulation combined with electron spin resonance (ESR) in a scanning tunneling microscope (STM). We show that a two-level system composed of a singlet state and a triplet state is insensitive to local and global magnetic field noise, resulting in much longer spin coherence times compared with individual atoms. Moreover, the spin decoherence resulting from the interaction with tunneling electrons is markedly reduced by a homodyne readout of ESR. These results demonstrate that atomically-precise spin structures can be designed and assembled to yield enhanced quantum coherence.
RFQD - a Decelerating Radio Frequency Quadrupole for the CERN Antiproton Facility
Creators: name: Bylinsky, Y.
name: Lombardi, A. M.
name: Pirkl, W.
Publisher: name: arXiv
Year: 2000
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The RFQD is designed to decelerate antiprotons of momentum 100 MeV/c (kinetic energy 5.33MeV)down to a kinetic energy variable between ~10 keV and 120 keV. Inside the RFQ body, at ground potential, the rf structure of the four-rod type is mounted on insulating supports. It can be biased between plus/minus 60 kV dc to achieve the continuous adjustment of output energy required by the ASACUSA experiment at the CERN Antiproton Decelerator AD. The different parts of the system are described and the present status reported.
Best Possible Constant for Bandwidth Selection
Creators: name: Fan, Jianqing
name: Marron, James S.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 1992

description: For the data based choice of the bandwidth of a kernel density estimator, several methods have recently been proposed which have a very fast asymptotic rate of convergence to the optimal bandwidth. In particular the relative rate of convergence is the square root of the sample size, which is known to be the best possible. The point of this paper is to show how semiparametric arguments can be employed to calculate the best possible constant coefficient, that is, an analog of the usual Fisher information, in this convergence. This establishes an important benchmark as to how well bandwidth selection methods can ever hope to perform. It is seen that some existing methods attain the bound, others do not.
Noncommutative spacetime geometry and one-loop effects in primordial cosmology
Creators: name: Tan, H. S.
Publisher: name: arXiv
Year: 2018
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We study the effect of noncommutative spacetime geometry on one-loop corrections to the primordial curvature two-point function, arising from various forms of massless spectator matter fields interacting gravitationally with the inflaton. After deforming the algebra of functions on the inflationary background to a spatially noncommutative one, we find that this induces momentum-dependent corrections to one-loop terms which imply that the vacuum fluctuation of the energy-momentum tensor sources that of the curvature fluctuation even for distances beyond horizon scales. The one-loop corrections break spatial isotropy by being functions of the noncommutative parameters lying in the tranverse plane while reducing smoothly to the commutative limit. This furnishes an example of how UV/IR mixing manifests itself in the context of noncommutative field theories defined on inflationary backgrounds, and demonstrates how in principle, the primordial spectrum could carry a signature of nonlocality and anisotropy in the setting of noncommutative spacetime geometry.
description: 30 pages
Consistency of Data-Driven Histogram Methods for Density Estimation and Classification
Creators: name: Nobel, Andrew
name: Lugosi, Gábor
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 1996

description: We present general sufficient conditions for the almost sure $L_1$-consistency of histogram density estimates based on data-dependent partitions. Analogous conditions guarantee the almost-sure risk consistency of histogram classification schemes based on data-dependent partitions. Multivariate data are considered throughout.
Towards Automated Data Integration in Software Analytics
Creators: name: Martínez-Fernández, Silverio
name: Jovanovic, Petar
name: Franch, Xavier
name: Jedlitschka, Andreas
Publisher: name: arXiv
Year: 2018
Subjects: subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: Software organizations want to be able to base their decisions on the latest set of available data and the real-time analytics derived from them. In order to support "real-time enterprise" for software organizations and provide information transparency for diverse stakeholders, we integrate heterogeneous data sources about software analytics, such as static code analysis, testing results, issue tracking systems, network monitoring systems, etc. To deal with the heterogeneity of the underlying data sources, we follow an ontology-based data integration approach in this paper and define an ontology that captures the semantics of relevant data for software analytics. Furthermore, we focus on the integration of such data sources by proposing two approaches: a static and a dynamic one. We first discuss the current static approach with a predefined set of analytic views representing software quality factors and further envision how this process could be automated in order to dynamically build custom user analysis using a semi-automatic platform for managing the lifecycle of analytics infrastructures.
description: This is an author's accepted manuscript of a paper to be published by ACM in the 12th International Workshop on Real-Time Business Intelligence and Analytics (BIRTE@VLDB) 2018. The final authenticated version will be available through https://doi.org/10.1145/3242153.3242159
Bottomonium from NRQCD with Dynamical Wilson Fermions
Creators: name: Spitz, A.
name: Eicker, N.
name: Fingberg, J.
name: Güsken, S.
name: Hoeber, H.
name: Lippert, Th.
name: Schilling, K.
name: Viehoff, J.
Publisher: name: arXiv
Year: 1997
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We present results for the b \bar b spectrum obtained using an O(M_bv^6)-correct non-relativistic lattice QCD action. Propagators are evaluated on SESAM's three sets of dynamical gauge configurations generated with two flavours of Wilson fermions at beta = 5.6. Compared to a quenched simulation at equivalent lattice spacing we find better agreement of our dynamical data with experimental results in the spin-independent sector but observe no unquenching effects in hyperfine-splittings. To pin down the systematic errors we have also compared quenched results in different ``tadpole'' schemes and used a lower order action.
description: Talk presented at LATTICE'97, 3 pages, Latex
The dinoflagellate cyst genera Achomosphaera Evitt 1963 and Spiniferites Mantell 1850 in Pliocene to modern sediments: a summary of round table discussions
Creators: name: Mertens, Kenneth Neil
name: Nieuwenhove, Nicolas Van
name: Gurdebeke, Pieter R.
name: Aydin, Hilal
name: Bogus, Kara
name: Bringué, Manuel
name: Dale, Barrie
name: Schepper, Stijn De
name: Vernal, Anne De
name: Ellegaard, Marianne
name: Grothe, Arjen
name: Haifeng Gu
name: Head, Martin J.
name: Heikkilä, Maija
name: Limoges, Audrey
name: Londeix, Laurent
name: Louwye, Stephen
name: Marret, Fabienne
name: Masure, Edwige
name: Matsuoka, Kazumi
name: Mudie, Peta J.
name: Penaud, Aurélie
name: Pospelova, Vera
name: Price, Andrea Michelle
name: Ribeiro, Sofia
name: Rochon, André
name: Sangiorgi, Francesca
name: Schreck, Michael
name: Torres, Vladimir
name: Uzar, Serdar
name: Versteegh, Gerard J. M.
name: Warny, Sophie
name: Zonneveld, Karin
Publisher: name: Taylor & Francis
Year: 2018
Subjects: subject: Medicine
subject: Genetics
subject: FOS: Biological sciences
subject: Evolutionary Biology
subject: Ecology
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: Inorganic Chemistry
subject: FOS: Chemical sciences
subject: Computational Biology

description: We present a summary of two round-table discussions held during two subsequent workshops in Montreal (Canada) on 16 April 2014 and Ostend (Belgium) on 8 July 2015. Five species of the genus Achomosphaera Evitt 1963 and 33 of the genus Spiniferites Mantell 1850 emend. Sarjeant 1970 occuring in Pliocene to modern sediments are listed and briefly described along with remarks made by workshop participants. In addition, several holotypes and topotypes are reillustrated. Three species previously assigned to Spiniferites are here considered/accepted as belonging to other genera: Impagidinium inaequalis (Wall and Dale in Wall et al. 1973) Londeix et al. 2009, Spiniferites? rubinus (Rossignol 1962 ex Rossignol 1964) Sarjeant 1970, and Thalassiphora balcanica Balteş 1971. This summary forms the basis for a set of papers that follows, where points raised during the workshops are explored in greater detail.
Minimal Gauge Invariant Classes of Tree Diagrams in Gauge Theories
Creators: name: Boos, Edward
name: Ohl, Thorsten
Publisher: name: arXiv
Year: 1999
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We describe the explicit construction of groves, the smallest gauge invariant classes of tree Feynman diagrams in gauge theories. The construction is valid for gauge theories with any number of group factors which may be mixed. It requires no summation over a complete gauge group multiplet of external matter fields. The method is therefore suitable for defining gauge invariant classes of Feynman diagrams for processes with many observed final state particles in the standard model and its extensions.
description: 13 pages, RevTeX (EPS figures)
Direct Estimation of Low Dimensional Components in Additive Models
Creators: name: The University of North Carolina at Chapel Hill University Libraries
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 1998

description: Additive regression models have turned out to be a useful statistical tool in analyses of high-dimensional data sets. Recently, an estimator of additive components has been introduced by Linton and Nielsen which is based on marginal integration. The explicit definition of this estimator makes possible a fast computation and allows an asymptotic distribution theory. In this paper an asymptotic treatment of this estimate is offered for several models. A modification of this procedure is introduced. We consider weighted marginal integration for local linear fits and we show that this estimate has the following advantages.
Burmeistera multipinnatisecta Lozano & Galeano, Caldasia 1986
Creators: name: González, Favio
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Asterales
Campanulaceae
Burmeistera
Burmeistera multipinnatisecta

description: 34. Burmeistera multipinnatisecta Lozano & Galeano, Caldasia 15: 53. 1986.
 Type:— COLOMBIA. Chocó: Carmen de Atrato, carretera a Urrao, ca. 15 km al NO de la cabecera municipal, 2500 m, 7 Nov 1985 (fl), G. Galeano et al. 724 (holotype: COL! [COL000004736]; isotype: COL! [COL000004737]). Figs. 16H, I, 17.
Scandent herbs up to 1 m tall. Stem glabrous. Petiole up to 2.5 cm long, glabrous; blade multipinnatisect, 2–5 × 2–5 cm, dissected in acicular segments of third order or higher, each segment 2–5 × 0.5–1 mm, glabrous above, glabrous beneath, apex rounded, midvein conspicuous, veins of higher order unconspicuous. Peduncle 2.6–3.0 cm long, glabrous, ebracteolate. Hypanthium obconic, 5–6 × 4–5 mm, glabrous. Calyx lobes lineariform, 8–9 × 1–2 mm, patent, glabrous, basally spaced by sinuses up to 1 mm wide, margin toothed to slightly lobed, with 1 or 2 projections per side, apex rounded. Corolla green suffused with purple, glabrous; tube 1.2 cm long, 2–3 mm diameter at its mid- and distal level, inflated proximally; lobes narrowly ovate, falcate, apex acuminate, dorsal lobes 8–10 × 4.5–5.2 mm, lateral lobes 9–10 × 2.5‒3.0 mm, ventral lobe 5.0–5.5 × 3.0– 3.2 mm. Synandrium 1.7–2.2 cm long, exserted up to 7 mm; filament tube 1.4–1.8 cm long, glabrous; anther tube 3–4 mm long, glabrous except for the apically barbate ventral anthers. Fruits unknown.
 Phenology: — Burmeistera multipinnatisecta has been collected with flowers in November.
 Distribution, ecology and conservation status: — Burmeistera multipinnatisecta is restricted to the Colombian department of Chocó. The species is known only from the type locality in the western flank of the Western Cordillera, at an elevation of 2500 m. It occurs along steep slopes bordering forests with Ficus, Ocotea, Croton and Cedrela. Following the IUCN´s (2022) criteria [B1(EOO) and B2(AOO), conditions (a) and (b), and C2(a)(i)], this species qualifies as Critically Endangered.
 Note: — Burmeistera multipinnatisecta is the only Colombian species with multipinnatisect leaf blades. Two additional species (B. pinnatisecta and B. pteridioides), also restricted to Colombia, have pinnatisect leaves (i.e. dissected in first or second order segments), and obconic hypanthia. In contrast, B. multipinnatisecta has leaves dissected in acicular segments of third or more order, and globose to subglobose hypanthia.
description: Published as part of González, Favio, 2023, Taxonomic revision of Burmeistera (Campanulaceae-Lobelioideae) in Colombia, pp. 1-113 in Phytotaxa 615 (1) on page 68, DOI: 10.11646/phytotaxa.615.1.1, http://zenodo.org/record/8389205
Epsilon-Near-Zero Response and Tunable Perfect Absorption in Weyl Semimetals
Creators: name: Halterman, Klaus
name: Alidoust, Mohammad
name: Zyuzin, Alexander
Publisher: name: arXiv
Year: 2018
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We theoretically study the electromagnetic response of type-I and type-II centrosymmetric Weyl semimetals. We derive an anisotropic permittivity tensor with off-diagonal elements to describe such gyrotropic media. Our findings reveal that for appropriate Weyl cones tilts, the real part of the transverse component of the permittivity can exhibit an epsilon-near-zero response. The tilt parameter can also control the amount of loss in the medium, ranging from lossless to dissipative when transitioning from type-I to type-II. Similarly, by tuning either the frequency of the electromagnetic field or the chemical potential in the system, an epsilon-near-zero response can appear as the permittivity of the Weyl semimetal transitions between positive and negative values. Employing the obtained permittivity tensor, we consider a setup where the Weyl semimetal is deposited on a perfect conductive substrate and study the refection and absorption characteristics of this layered configuration. We show that by choosing the proper geometrical and material parameters, devices can be created that perfectly absorb electromagnetic energy over a wide angular range of incident electromagnetic waves.
description: To be published in Phys. Rev. B