16,090 research outputs found
Chao Yuen Ren (1892–1982)
No full textY. R. Chao is easily the most famous linguist to have come out of China. Born before the end of the last dynasty in China, he received a traditional Confucian education, but was also one of the first Chinese people to be sent to the West for training in modern Western science (under the Boxer Indemnity Fund). The remarkable breadth and scope of his studies included physics, mathematics, linguistics, musical and literary composition, and translation, and he was a pioneer in many of these fields
Molecular dynamics simulations of fluid methane properties using ab initio intermolecular interaction potentials
No full textVulnerability and Resilience of the Bang Luang Community to Flooding from the Chao Phraya River
No full textFlooding is a natural phenomenon and in the past Thai people have adapted to flood events. However over the years land degradation, deforestation and bad urban practices have exacerbated the impact of flood disasters. This study of flood management in Thailand shows how human activities and interventions have impacted on the river basin system. This research focuses on the vulnerability to flood hazard of the people living or working near the Chao Phraya River. The case study is of the community living or working in the proximity of Wat Bang Luang (Bang Luang Temple) of the Pathum Thani Province, Thailand.
This research explores the capacity of communities to live with or cope with floods. Their adaptations to changes in flood regimes will depend on several factors: political (especially when Thailand has a long history of preoccupation with engineering and technological solutions as the main approach to disaster response), economic, ecological (human modification to flood plains), social (kin-based networks) and cultural factors.
The data collected from the target community showed a power struggle between Thai culture and the dominant hazard management paradigm. This research put a human face on natural disaster and looked at the issue of flooding from the experiences of ordinary people. The findings showed that some members of the community are resilient while others are passive and are more vulnerable to floods. However, it is important not to label any individual or group as either vulnerable or resilient as people can be both at the same time and policy makers need to build on the strengths, rather than focus on the weaknesses and on offering emergency relief
Calculation of the cross sections for the (n, l) changing collisions of Rydberg Hydrogen atoms with helium ions.
No full textMeasurement of the branching ratios Gamma(D-s(*+)-> D-s(+)pi(0))/Gamma(D-s(*+)-> D-s(+)gamma) and Gamma(D-*0 -> D-0 pi(0))/Gamma(D-*0 -> D-0 gamma)
No full textData samples corresponding to the isospin-violating decay D-s(*+)-> D(s)(+)pi(0) and the decays D-s(*+)-> D(s)(+)gamma, D-*0-> D(0)pi(0) and D-*0-> D(0)gamma are reconstructed using 90.4 fb(-1) of data recorded by the BABAR detector at the PEP-II asymmetric-energy e(+)e(-) collider. The following branching ratios are extracted: Gamma(D-s(*+)-> D(s)(+)pi(0))/Gamma(D-s(*+)-> D(s)(+)gamma)=0.062 +/- 0.005(stat.)+/- 0.006(syst.) and Gamma(D-*0-> D(0)pi(0))/Gamma(D-*0-> D(0)gamma)=1.74 +/- 0.02(stat.)+/- 0.13(syst.). Both measurements represent significant improvements over present world averages
S-D mixing and psi(3770) production in e(+)e(-) annihilation and B decay and its radiative transitions
No full textThe large decay rate observed by Belle for B+-->psi(3770)K+, which is comparable to B+-->psi(3686)K+, might indicate either an unexpectedly large S-D mixing angle |theta|approximate to40(degrees) or the leading role of the color-octet mechanism in D-wave charmonium production in B decay. By calculating the production rate of psi(3770) in the continuum e(+)e(-) annihilation at roots=10.6 GeV with these two possible approaches (i.e., the large S-D mixing and the color-octet mechanism), we show that the measurement for this process at Belle and BABAR may provide a clear cut clarification for the two approaches. In addition, the radiative E1 transition ratio Gamma[psi(3770)-->gammachi(c2)]/Gamma[psi(3770)-->gammachi(c1)] may dramatically change from similar to 0.04 (for thetaapproximate to0(degrees)) to similar to200 (for thetaapproximate to-40(degrees)) due to the large S-D interference effect, thus the E1 transition measurement of psi(3770) at Beijing Spectrometer and CLEO-c will also be very useful in clarifying this issue.Astronomy & AstrophysicsPhysics, Particles & FieldsSCI(E)5ARTICLE9null7
Indocalamus emeiensis C. D. Chu et C. S. Chao 1980
No full textIndocalamus emeiensis C. D. Chu et C. S. Chao (1980: 24) (Fig. 6) Type: — China, Sichuan: Leshan, E’mei Moutain, Hongchunping, elev. 1000–1200 m, 7 June 1976, C. D. Chu & C. S. Chao 76037 (lectotype, designated here, NF3001692!; isolectotypes, NF!, N!, photo PE!) = Indocalamus chongzhouensis Yi et Yang (2004: 13), syn. nov. Type : — China, Sichuan, Chongzhou, Sanlang Town, Chayuan Village, elev. 850–1100 m, 17 Sep. 2003, T. P. Yi 03014 (Syntypes: SIFS!). Revised description:— Rhizomes leptomorph. Culms 1.5–4.2 m tall, 0.7–1.5 cm in diameter, hollow; internodes terete, 20–38 cm long, young culm reddish-brown strigose, infranodal region white powdery, glabrescent when old; wall 1.5–3.0 mm thick; supranodal ridge prominently raised; intranodes 5–15 mm long. Culm sheaths tardily deciduous, oblong, thinly leathery or papery, 1/2 as long as internodes, densely reddish-brown strigose and purple-spotted, margin densely reddish-brown ciliate; auricles falcate, 7–15 mm long, 3–4 mm wide; oral setae radiate, 1.5–2 cm long; ligules 1–3 mm tall, truncate, margin densely ciliate; blades recurved, lanceolate. Foliage leaves 5 or 6 per ultimate branch; sheath sparsely puberulent initially, glabrescent, margin densely ciliate; auricles falcate, 1–2 cm long, 2–3 mm wide; oral setae radiate, 1.5–2.5 cm long; ligules truncate, 2–4 mm tall, margin densely ciliate; blades oblong-lanceolate, 33.0–42.5 × 5.9–9.5 cm, both surfaces glabrous, longitudinal veins 10–15 pairs, base cuneate, apex long-acuminate, margin entire. Inflorescence unknown. Distribution and habitat: — Indocalamus emeiensis is endemic to Sichuan Province, China (Fig. 7) with three distributed localities found so far, i.e., Muping, Sanlang and Emei Mountain. It usually grows in the understory of evergreen broad-leaved forests or dank valleys at elevations of 850–1200 m. Phenology: —New shoots from August to October. Flowering unknown. Additional specimens examined: — CHINA. Sichuan: Chongzhou, Sanlang, 13 Jul. 2018, Gao et al., SCCD1801 (JXAU); ibid., 18 Oct. 2019, Gao et al., SCCD1901 (JXAU); ibid., 10 Aug. 2020, Gao et al., SCCD2001 (JXAU); Leshan, E’mei Mountain, Hongchunping, 28 Sep. 1997, T. P. Yi s.n. (SIFS); ibid., 20 Oct. 1990, T. P. Yi 90130 (SIFS); ibid., 15 Jul. 2018, Gao et al., SCEM1801 (JXAU); ibid., 19 Oct. 2019, Gao et al., SCEM190 (JXAU); ibid., 11 Aug. 2020, Gao et al., SCEM2001 (JXAU); Ya’an, Baoxing, Muping, 8 Jul. 1998, T. P. Yi 98555 (SIFS).Published as part of Gao, Li-Qin, Li, Yong-Long, Guo, Chun-Ce, Yang, Guang-Yao & Zhang, Wen-Gen, 2022, Indocalamus chongzhouensis (Poaceae: Bambusoideae), a new synonym of I. emeiensis: evidence from morphology and complete chloroplast genome data, pp. 53-63 in Phytotaxa 542 (1) on pages 60-61, DOI: 10.11646/phytotaxa.542.1.4, http://zenodo.org/record/640455
Nonrelativistic QCD predictions of D-wave quarkonia D-3(J)(J=1, 2, 3) decay into light hadrons at order alpha(3)(s)
No full textIn this paper, in the framework of nonrelativistic QCD we study the light hadron (LH) decays of the spin-triplet (S = 1) D-wave heavy quarkonia. The short-distance coefficients of all Fock states in the D-3(J) (J = 1, 2, 3) quarkonia including the D-wave color singlet, P-wave color octet, and S-wave color singlet and color octet are calculated perturbatively at alpha(3)(s) order. The operator evolution equations of the four-fermion operators are also derived and are used to estimate the numerical values of the long-distance matrix elements. We find that for the c (c) over bar system, the LH decay widths of psi(1(3)D(J)) predicted by nonrelativistic QCD is about 2 similar to 3 times larger than the phenomenological potential model results, while for the b (b) over bar system the two theoretical estimations of Gamma(gamma(1(3)D(J)) -> LH) are in coincidence with each other. Our predictions for psi(1(3)D(J)) LH decay widths are Gamma(psi(1(3)D(J)) -> LH) = (435, 50, 172) keV for J = 1, 2, 3; and for gamma(1(3)D(J)), Gamma(gamma(1(3)D(J)) -> LH) = (6.91, 0.75, 2.75) keV for J = 1, 2, 3.Astronomy & AstrophysicsPhysics, Particles & FieldsSCI(E)8ARTICLE7null8
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