159,521 research outputs found
Measurement of the ratio of prompt χ c to J / ψ production in pp collisions at √s = 7 TeV
No full textThe prompt production of charmonium χ c and J / ψ states is studied in proton-proton collisions at a centre-of-mass energy of √s = 7 TeV at the Large Hadron Collider. The χ c and J / ψ mesons are identified through their decays χ c → J / ψ γ and J / ψ → μ + μ - using 36 pb - 1 of data collected by the LHCb detector in 2010. The ratio of the prompt production cross-sections for χ c and J / ψ, σ (χ c → J / ψ γ) / σ (J / ψ), is determined as a function of the J / ψ transverse momentum in the range 2 < p T J / ψ < 15 GeV / c. The results are in excellent agreement with next-to-leading order non-relativistic expectations and show a significant discrepancy compared with the colour singlet model prediction at leading order, especially in the low p T J / ψ region
Prompt charm production in pp collisions at √<span style="text-decoration:overline">s</span>=7 TeV
No full textCharm production at the LHC in pp collisions at s√=7 TeV is studied with the LHCb detector. The decays D0→K−π+, D+→K−π+π+, D⁎+→D0(K−π+)π+, D+s→ϕ(K−K+)π+, Λ+c→pK−π+, and their charge conjugates are analysed in a data set corresponding to an integrated luminosity of 15 nb−1. Differential cross-sections dσ/dpT are measured for prompt production of the five charmed hadron species in bins of transverse momentum and rapidity in the region 0<pT<8 GeV/c and 2.0<y<4.5. Theoretical predictions are compared to the measured differential cross-sections. The integrated cross-sections of the charm hadrons are computed in the above pT-y range, and their ratios are reported. A combination of the five integrated cross-section measurements gives
σ(cc¯)pT<8 GeV/c,2.0<y<4.5=1419±12(stat)±116(syst)±65(frag) μb,
where the uncertainties are statistical, systematic, and due to the fragmentation functions
The relationship between civic attitudes and voting intention : an analysis of vocational upper secondary schools in England and Singapore
No full textFrom 2009 to 2011, a team from the Centre for Learning and Life Chances in Knowledge Economies and Societies carried out a mixedmethods study of young people in England and Singapore. With regard to civic attitudes, the study showed that there was a greater sense of political self-efficacy and collective (school) efficacy in Singapore than in England. In addition, the group in Singapore scored higher on future voting relative to the group in England. Further, while both political self-efficacy and collective (school) efficacy were correlated with future voting in England, only the latter was correlated in the case of Singapore. For some, the results may seem counter-intuitive. The article reflects on these results, particularly those relating to democratic outcomes
Enhanced flux pinning and formation of Ba4Y2CuMoOy in top-seeded melt growth processed YBa2Cu3O7-d superconductors with Mo additions
No full textThe effect of Mo addition (0-10 wt%) on the superconductivity of top-seeded melt growth (TSMG) processed YBa2Cu3O7-y (Y123) superconductors was studied. The low level Mo addition (<= 1 wt%) led to a small decrease of the superconducting transition temperature (T-c) and increase of the critical current density (J(c)). The J(c) improvement induced by the low level Mo additions appeared as a peak effect at the intermediated magnetic fields and peak position shift to the lower magnetic fields with increasing Mo content. The enhanced flux pinning caused by Mo additions seems to be attributed to the partial Cu substitution by Mo, YBa2(Cu1-xMox)(3)O7-d. The high level Mo additions (2-10 wt%), however, led to a large J(c) decrease and broad superconducting transition due to the formation of low-T-c phases and the increased volume of the non-superconducting Mo-containing phase. The second particle phase formed by the high level Mo additions was identified as Ba4Y2CuMoOy (Mo4211) by x-ray diffraction (XRD) and scanning electron microscopy energy dispersive x-ray (SEM EDX) analysis
sj-pdf-1-han-10.1177_15589447211030692 – Supplemental material for Patient Perspectives on Telemedicine During the COVID-19 Pandemic
No full textSupplemental material, sj-pdf-1-han-10.1177_15589447211030692 for Patient Perspectives on Telemedicine During the COVID-19 Pandemic by Farhan Ahmad, Robert W. Wysocki, John J. Fernandez, Mark S. Cohen and Xavier C. Simcock in HAND</p
Stenoloba acutivalva Han & Kononenko 2009
No full textStenoloba acutivalva Han & Kononenko 2009 (Figs 19, 52) Stenoloba acutivalva Han & Kononenko 2009, Zootaxa 2268: 18, figs 17, 34 (Holotype: male, China, Aut. Reg. Guangxi, Guilin, IZCAS, Beijing). Material examined. 2 males, 1 female, China, Prov. Yunnan, Simao, Beishan, 17.vi.2013, H.L. Han & C. Zhang leg., slide HHL-6142-1, HHL-6143-1; female HHL-6144-2, coll. NEFU. Diagnosis. This and next two species belong to the S. viridescens species group, represented in China by four species (S. viridescens is not treated here). Externally S. acutivalva (Fig. 19) differs from its allies by simpler forewing pattern, clearly marked with moss-green, and with white basal field, inner part of subbasal field and subtornal mark. Orbicular not expressed, reniform marked as 1–2 blackish dots, or not or expressed, as greyish suffusion. The male genitalia (illustrated by Han & Kononenko 2009) are characterized by the structure of the valva with upcurved acute apex and quadrangular plate in apical part of costal margin of valva. The structure of aedeagus and vesica are similar to that of allied species. The female genitalia (Fig. 52) could be characterized by quadrangular papillae anales, elongate, slightly conical shape of antrum, and rather long sclerotised ductus bursae with characteristic for the species-group and for the species sclerotised appendix, which joining with posterior part of ductus almost under straight angle; corpus bursae rounded and wrinkled. Distribution. South China (Aut. Reg. Guangxi, Prov Yunnan). Notes. The female genitalia are described for the first time.Published as part of Han, H. L. & Kononenko, V. S., 2018, Twelve new species and four new records of Stenoloba Staudinger 1892 from China (Lepidoptera, Noctuidae: Bryophilinae), pp. 301-327 in Zootaxa 4388 (3) on page 313, DOI: 10.11646/zootaxa.4388.3.1, http://zenodo.org/record/118855
A closed-form solution to the discrete-time Kalman filter and its applications
No full textThis paper presents a closed-form solution to the discrete-time Kalman filter and its applications. We first represent the Kalman filter in terms of model parameters without using the Riccati equation and requiring any artificial conditions such as invertibility of a system matrix and no system noises. Replacing the initial time with the fixed-lag time to achieve the finite memory with respect to inputs and outputs, and choosing the proper initial covariances on the recent finite horizon, we easily obtain the minimum variance finite memory filter and then propose its iterative computation algorithm. As another application, a closed-form solution to the difference Riccati equation on the finite horizon is utilized to obtain a stabilizing gain matrix of a Luenberger-type filter as in Ackermann's formula. (C) 2010 Elsevier B.V. All rights reserved.X113sciescopu
sj-docx-1-han-10.1177_15589447221130093 – Supplemental material for Virtual and Augmented Reality in Management of Phantom Limb Pain: A Systematic Review
No full textSupplemental material, sj-docx-1-han-10.1177_15589447221130093 for Virtual and Augmented Reality in Management of Phantom Limb Pain: A Systematic Review by Abdullah S. Eldaly, Francisco R. Avila, Ricardo A. Torres-Guzman, Karla C. Maita, John P. Garcia, Luiza Palmieri Serrano, Omar S. Emam and Antonio J. Forte in HAND</p
sj-tiff-2-han-10.1177_15589447221130093 – Supplemental material for Virtual and Augmented Reality in Management of Phantom Limb Pain: A Systematic Review
No full textSupplemental material, sj-tiff-2-han-10.1177_15589447221130093 for Virtual and Augmented Reality in Management of Phantom Limb Pain: A Systematic Review by Abdullah S. Eldaly, Francisco R. Avila, Ricardo A. Torres-Guzman, Karla C. Maita, John P. Garcia, Luiza Palmieri Serrano, Omar S. Emam and Antonio J. Forte in HAND</p
Seed source and region effects on growth rate and survival of blue spruce (Picea pungens) Christmas trees in New Jersey
No full textSeedlings from five different seed sources of blue spruce Christmas trees were planted at five sites throughout New Jersey. Two sites in northern New Jersey and one in central New Jersey had significantly higher survival rates than the two in southern New Jersey. Additionally, the two sites in northern New Jersey had significantly faster growth rates than those in southern and central New Jersey. There were no significant differences in survival rates between seed sources. In terms of growth rates, however, seedlings from seeds obtained in Santa Fe National Forest, New Mexico grew significantly faster than seedlings from the other seed sources tested. This forther growth rate is predicted to shorten the time needed to reach marketability size by one to five years
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