73,871 research outputs found
-systems, -networks and -covers
No full textsummary:The concepts of -systems, -networks and -covers were defined by A. Arhangel’skiǐ in 1964, P. O’Meara in 1971 and R. McCoy, I. Ntantu in 1985, respectively. In this paper the relationships among -systems, -networks and -covers are further discussed and are established by -systems. As applications, some new characterizations of quotients or closed images of locally compact metric spaces are given by means of -systems
Branching fraction and CP asymmetry of the decays B+→K0Sπ+ and B+→K0SK+
No full textAn 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
High-k/InGaAs interface defects at cryogenic temperature
No full textOxide defects in the high-k/InGaAs MOS system are investigated. The behaviour of these traps is explored from room temperature down to 10 K. This study reveals that the exchange of free carriers between oxide states and either the conduction or the valence band is strongly temperature dependant. The capture and emission of electrons is strongly suppressed at 10 K as demonstrated by the collapse of the capacitance frequency dispersion in accumulation for n-InGaAs MOS devices, though hysteresis in the C-V sweeps is still present at 10 K. Phonon assisted tunnelling processes are considered in the simulation of electrical characteristics. The simulated data match very well the experimental characteristics and provide energy and spatial mapping of oxide defects. The multi phonon theory also help explain the impedance data temperature dependence. This study also reveals an asymmetry in the free carrier trapping between n and p type devices, where hole trapping is more significant at 10 K
The Spectrum of β-Thalassemia Mutations in Taiwan:Identification of a Novel Frameshift Mutation
No full textMeasurement of the ratio of branching fractions B(B0→K∗0γ )/B(B0s→φγ ) and the directCP asymmetry inB 0→K∗0γ
No full textThe 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
Reduced Na+ - K+ -ATPase Activities in the Cochleae of Guinea Pigs with Experimental Endolymphatic Hydrops
No full textMimela ruyuanensis , Lin 1990
No full text<i>Mimela ruyuanensis</i> Lin, 1990 <p>(Figs. 15A–E)</p> <p> <i>Mimela ruyuanensis</i> Lin, 1990: 24, fig. 11 [original description, type locality: Guangdong, Ruyuan]; Lin 1993: 57, fig. 42 (in text), pl. VII, fig. 55 & 56, pl. XV, fig. 41, pl. XXI, fig. 33 [redescription, <i>sericicollis</i> -group]; Zorn 2006: 269 [catalogued]; Krajčik 2007: 88 [catalogued]; Zorn & Bezděk 2016: 347 [catalogued].</p> <p> <b>Type material examined.</b> None. Type material was not located in SYSU (visited by the author, Dec. 2019). The identification is based on the original description and Lin (1993).</p> <p> <b>Additional material examined</b> (2♂♂, 1♀). 1♂ (CCPC), CHINA, Guangxi Province, Guilin City, Xing’an County, Gaozhai, 500~ 600m, V.21–23.2013, Yu-Feng Hsu leg.; 1♂, 1♀ (ZMPC), Guangxi, Xing’an County, Mount Maoershan 25~ 30-v-2011.</p> <p> <b>Remarks.</b> When describing <i>Mimela ruyuanensis</i>, Lin (1990) overlooked the closest sibling, <i>Mimela fruhstorferi</i> Ohaus, 1902 (Fig. 15F–K) from Mount Mauson, Vietnam. A male topotype of <i>M. fruhstorferi</i> examined by Carsten Zorn (personal communication 2019) confirms that they are allied but not conspecific as they possess different body color and shape of parameres. Males of <i>M. ruyuanensis</i> have purplish luster upon the reddish brown body, while females of both species are reddish brown (Lin 1990, 1993; Ohaus 1902). <i>Mimlea ruyuanensis</i> is recorded from Guangxi Province for the first time.</p> <p> <b>Distribution.</b> China: Guangdong, Guangxi *.</p>Published as part of <i>Zhao, Ming-Zhi, 2021, On the genus Mimela Kirby, 1823 (Coleoptera: Scarabaeidae: Rutelinae) from China and adjacent countries, with description of five new species, pp. 201-230 in Zootaxa 4995 (2)</i> on page 223, DOI: 10.11646/zootaxa.4995.2.1, <a href="http://zenodo.org/record/5056160">http://zenodo.org/record/5056160</a>
Reverse the Transformed Phenotypes of V-H-Ras NIH3T3 Cells by Flavonoids Through Attenuating the Content of Phosphotyrosine
No full textA Clinical Study in Intravenous Immunoglobulin Therapy for Childhood Idiopathic Chromobocytopenic Purpura
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