85,197 research outputs found
Branching fraction and CP asymmetry of the decays B+→K0Sπ+ and B+→K0SK+
Get PDFAn analysis of B+ → K0
Sπ+ and B+ → K0
S K+ decays is performed with the LHCb experiment. The pp
collision data used correspond to integrated luminosities of 1 fb−1 and 2 fb−1 collected at centre-ofmass
energies of
√
s = 7 TeV and
√
s = 8 TeV, respectively. The ratio of branching fractions and the
direct CP asymmetries are measured to be B(B+ → K0
S K+
)/B(B+ → K0
Sπ+
) = 0.064 ± 0.009 (stat.) ±
0.004 (syst.), ACP(B+ → K0
Sπ+
) = −0.022 ± 0.025 (stat.) ± 0.010 (syst.) and ACP(B+ → K0
S K+
) =
−0.21 ± 0.14 (stat.) ± 0.01 (syst.). The data sample taken at
√
s = 7 TeV is used to search for
B+
c
→ K0
S K+ decays and results in the upper limit ( fc · B(B+
c
→ K0
S K+
))/( fu · B(B+ → K0
Sπ+
)) <
5.8 × 10−2 at 90% confidence level, where fc and fu denote the hadronisation fractions of a ¯b
quark
into a B+
c or a B+ meson, respectively
Codonopsis atriplicifolia Y. YU & Q. Wang, MW 2021, sp. nov.
No full text<i>Codonopsis atriplicifolia</i> Y. Yu & Q. Wang, sp. nov. Figs. 2A–F <p> <b>Type</b>:— CHINA. Sichuan, Baiyu, Chola mountains, rocky slope, 3300 m, 19 Jul 2020, <i>Y. Yu et al. DS02</i> (holotype: SZ barcode 02042692!; isotypes: SZ barcodes 02042693!, 02042694!, 02042695!).</p> <p>Roots carrot-shaped, slender, 5–20 cm long, 0.3–0.5 cm in diameter. Stems erect, 50–120 cm tall, simple or branched below, sparsely pubescent to subglabrous. Leaves subrosulate, alternate; petiole 0.5–4 cm long, subglabrous; leaf blade linear-lanceolate, 3–15 cm long, 0.5–1.5 cm broad, adaxially green, sparsely hispidulous, abaxially gray-green, sparsely hispid along veins, base cuneate, margin subentire to pinnatipartite, apex obtuse. Flowers often solitary and terminal on main stem and branches. Calyx tube adnate to whole hypanthium, semiglobose, 10-ribbed, subglabrous; calyx lobes narrowly deltoid, 0.4–0.8 cm long, 0.2–0.3 mm broad, glabrous, margin entire, sometimes sparsely serrate, apex acute; sinus between lobes broad and truncate. Corolla broadly campanulate, 1–2 cm long, 1.5–2 cm wide, lobed to near one third, red-purple with dark purple veins, and white on apex of corolla lobe, glabrous on both sides with sparsely hispidulous margin. Stamens glabrous; filaments 0.3–0.5 cm long, slightly dilated at base; anthers ca. 3 mm long. Capsule semiglobose below, conical above. Seeds unknown.</p> <p> <b>Etymology</b>:—From Latin, <i>atriplici-</i> ‘ <i>Atriplex</i> ’ + <i>folia</i> ‘leaf’. Meaning the species with leaves like those from the species of <i>Atriplex</i> Linnaeus (1753: 1052), which is a genus that belongs to the family Amaranthaceae. In order to facilitate communication among local scholars, we suggest a Chinese name: <b>bīnlíyè dǎngshēn</b> (滨※叶党参).</p> <p> <b>Phenology</b>:—Flowering from June to August; fruiting in September and October.</p> <p> <b>Habitat</b>:—Rocky slopes at an altitude of ca. 3300 m.</p> <p> <b>Distribution</b>:—Endemic to western Sichuan, China.</p>Published as part of <i>Zhou, Yu-Yang, Si, Yun-Hao, Zhang, Zhen, Wang, Qiang & Yu, Yan, 2021, Codonopsis atriplicifolia (Campanulaceae), a new species from western Sichuan, China, pp. 197-204 in Phytotaxa 512 (3)</i> on page 199, DOI: 10.11646/phytotaxa.512.3.7, <a href="http://zenodo.org/record/5305521">http://zenodo.org/record/5305521</a>
Two characteristic energies in the low-energy magnetic response of the electron-doped high-temperature superconductor<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mtext>Nd</mml:mtext></mml:mrow><mml:mrow><mml:mn>2</mml:mn><mml:mo>−</mml:mo><mml:mi>x</mml:mi></mml:mrow></mml:msub><mml:msub><mml:mrow><mml:mtext>Ce</mml:mtext></mml:mrow><mml:mi>x</mml:mi></mml:msub><mml:msub><mml:mrow><mml:mtext>CuO</mml:mtext></mml:mrow><mml:mrow><mml:mn>4</mml:mn><mml:mo>+</mml:mo><mml:mi>δ</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math>
No full textNeutron scattering for Nd2-xCexCuO4+delta(x approximate to 0.155, T-c=25 K) reveals two distinct magnetic energy scales in the superconducting state: omega(1)approximate to 6.4 meV and omega(2)approximate to 4.5 meV. These magnetic energies agree quantitatively with the B-1g/B-2g and A(1g) features observed in electronic Raman scattering, where the former is believed to indicate the maximum superconducting gap and the origin of the latter has remained unexplained. The data are inconsistent with previous claims of the existence of a magnetic resonance mode near 10 meV, but consistent with a resonance at omega(2) and with the recently established universal ratio of resonance energy to superconducting gap in unconventional superconductors [G. Yu et al., Nat. Phys. 5, 873 (2009)].DOE [DE-AC02-76SF00515]; NSF [DMR-0705086
Gonzalez 2021 tagged CO model archive
No full textPlease see README file for a detailed description of the data.This archive contains model code, input files, and simulation results for atmospheric carbon monoxide (CO) posted in association with the referenced paper.NASA (#NNX17AK18G)Millet, Dylan B.; Gonzalez, Andres; Yu, Xueying. (2021). Gonzalez 2021 tagged CO model archive. Retrieved from the University Digital Conservancy, https://doi.org/10.13020/p2ze-1y93
Average current is better than peak current as therapeutic dosage for biphasic waveforms in a ventricular fibrillation pig model of cardiac arrest
No full textOBJECTIVE:
Defibrillation current has been shown to be a clinically more relevant dosing unit than energy. However, the effects of average and peak current in determining shock outcome are still undetermined. The aim of this study was to investigate the relationship between average current, peak current and defibrillation success when different biphasic waveforms were employed.
METHODS:
Ventricular fibrillation (VF) was electrically induced in 22 domestic male pigs. Animals were then randomized to receive defibrillation using one of two different biphasic waveforms. A grouped up-and-down defibrillation threshold-testing protocol was used to maintain the average success rate of 50% in the neighborhood. In 14 animals (Study A), defibrillations were accomplished with either biphasic truncated exponential (BTE) or rectilinear biphasic waveforms. In eight animals (Study B), shocks were delivered using two BTE waveforms that had identical peak current but different waveform durations.
RESULTS:
Both average and peak currents were associated with defibrillation success when BTE and rectilinear waveforms were investigated. However, when pathway impedance was less than 90Ω for the BTE waveform, bivariate correlation coefficient was 0.36 (p=0.001) for the average current, but only 0.21 (p=0.06) for the peak current in Study A. In Study B, a high defibrillation success (67.9% vs. 38.8%, p<0.001) was observed when the waveform delivered more average current (14.9±2.1A vs. 13.5±1.7A, p<0.001) while keeping the peak current unchanged.
CONCLUSION:
In this porcine model of VF, average current was better than peak current to be an adequate parameter to describe the therapeutic dosage when biphasic defibrillation waveforms were used. The institutional protocol number: P0805
Measurement of the ratio of branching fractions B(B0→K∗0γ )/B(B0s→φγ ) and the directCP asymmetry inB 0→K∗0γ
Get PDFThe ratio of branching fractions of the radiative B decays B0→K⁎0γ and B0s→ϕγ has been measured using an integrated luminosity of 1.0 fb−1 of pp collision data collected by the LHCb experiment at a centre-of-mass energy of s√=7TeV. The value obtained is
B(B0→K⁎0γ)B(B0s→ϕγ)=1.23±0.06(stat.)±0.04(syst.)±0.10(fs/fd),
where the first uncertainty is statistical, the second is the experimental systematic uncertainty and the third is associated with the ratio of fragmentation fractions fs/fd. Using the world average value for B(B0→K⁎0γ), the branching fraction B(B0s→ϕγ) is measured to be (3.5±0.4)×10−5.
The direct CP asymmetry in B0→K⁎0γ decays has also been measured with the same data and found to be
ACP(B0→K⁎0γ)=(0.8±1.7(stat.)±0.9(syst.))%.
Both measurements are the most precise to date and are in agreement with the previous experimental results and theoretical expectations
Nonstrangulating small colon obstruction caused by a submucosal haematoma
No full textS. Stahel, C. B. Riley, M. Wichtel and P.-Y. Daous
Gahrliepia meridionalis Yu Yang and Tu 1980
No full text<i>**</i> <i>Gahrliepia</i> cf. <i>meridionalis</i> Yu Yang and Tu, 1980 <p> <b>Material examined.</b> Vietnam: Lang Son (near Hữu Liên National Park)— <i>Tonkinomys daovantieni</i> (ZMMU, May 2012, 76 larvae).</p> <p> <b>Distribution.</b> China (Li <i>et al.</i> 1997).</p> <p> <b>Remarks.</b> Examined specimens differs from the original description from Yunnan province of China by the PSB length (105–117 vs. 118–131) and shorter legs (Ip = 655 vs. 706–789) (Yu <i>et al.</i> 1980).</p>Published as part of <i>Antonovskaia, A. A., Balakirev, A. E. & Lopatina, Y. V., 2023, New data on the distribution of chigger mites (Acariformes: Trombiculidae) associated with small mammals in Vietnam, pp. 271-306 in Zootaxa 5346 (3)</i> on page 276, DOI: 10.11646/zootaxa.5346.3.3, <a href="http://zenodo.org/record/8390149">http://zenodo.org/record/8390149</a>
Measurement of the branching fraction
Get PDFThe B
0
s
→ J/ψK
0
S
branching fraction is measured in a data sample corresponding to 0.41 fb−1
of integrated luminosity collected with the LHCb detector at the LHC. This channel is sensitive to
the penguin contributions affecting the sin 2β measurement from B
0
→ J/ψK
0
S
. The time-integrated
branching fraction is measured to be B(B
0
s
→ J/ψK
0
S
) = (1.83±0.28)×10−5
. This is the most precise
measurement to date
Catal. Today
No full textOrdered mesoporous Co3O4 (3D) and the bulk counterpart Co3O4 (B) were prepared by a nanocasting route and precipitation method, respectively. Pd was next loaded on both of them by an impregnation method. All catalysts were tested for the total oxidation of o-xylene in the temperature range of 150-300 C. Mesoporous Co3O4 (3D) exhibited better activity than Co3O4 (B), and Pd addition further improved the catalytic activity of both the mesoporous and bulk Co3O4. The BET and TEM results indicated that the mesoporous catalysts had uniform channel dimensions and the mesostructure was little affected by Pd addition. The TPR and XPS data indicated that Pd was much more exposed on the surface of Co3O4 (3D) than that of Co3O4 (B). TPD results showed that Pd/Co3O4 (3DL) could activate the oxygen species more easily than Pd/Co3O4 (BL). Therefore, Pd/Co3O4 (3DL) presented the best activity among the four catalysts and achieved 90% conversion of 150 ppm o-xylene at 249 degrees C at a space velocity of 60,000 mL g(-1) h(-1). (C) 2014 Elsevier B.V. All rights reserved
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