74,111 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
Lower Elwha River bridge near Port Angeles, 1914.
No full textC. J. Tucker, client.
A. Curtis 29684To order a reproduction, inquire about permissions, or for information about prices see:
http://www.lib.washington.edu/specialcollections/services/reproduction/reproduction
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Construction of the Seattle, Port Angeles and Lake Crescent Ry. along the lower Elwha River
No full textHighway bridge in background. Photograph taken for contractor C. J. Tucker.
A. Curtis 29686To order a reproduction, inquire about permissions, or for information about prices see:
http://www.lib.washington.edu/specialcollections/services/reproduction/reproduction
Please cite the Order Numbe
Construction of Seattle, Port Angeles, and Lake Crescent Ry., lower Elwha River trestle.
No full textShows steam shovel and donkey engine, highway bridge in background, and timber bents for railroad trestle. Photograph taken for contractor C. J. Tucker.
A. Curtis 29688To order a reproduction, inquire about permissions, or for information about prices see:
http://www.lib.washington.edu/specialcollections/services/reproduction/reproduction
Please cite the Order Numbe
A deterministic algorithm for experimental design applied to tomographic and microseismic monitoring surveys
No full textMost general experimental design algorithms are either: (i) stochastic and hence give different designs each time they are run with finite computing power, or (ii) deterministic but converge to results that depend on an initial or reference design, taking little or no account of the range of all other possible designs. In this paper we introduce an approximation to standard measures of experimental design quality that enables a new algorithm to be used. The algorithm is simple, deterministic and the resulting experimental design is influenced by the full range of possible designs, thus addressing problems (i) and (ii) above. Although the designs produced are not guaranteed to be globally optimal, they significantly increase the magnitude of small eigenvalues in the model–data relationship (without requiring that these eigenvalues be calculated). This reduces the model uncertainties expected post-experiment. We illustrate the method on simple tomographic and microseismic location examples with varying degrees of seismic attenuation
Spring session recital of contemporary instrumental music, May 27, 1975
No full textRecorded during a live performance at Oakland Recital Hall, Western Michigan University, May 27, 1975, program no. 295 of the Department of Music's 1974-1975 season.Various performers.Reel 1: Five sonorous inventions : 1973 / C. Curtis-Smith (Gerald Fischbach, violin ; C. Curtis-Smith, prepared piano) -- (18:47) 4 sketches for solo tuba : 1970 / Donald Para (Robert Whaley, tuba) -- (28:27) Three pieces for chamber orchestra : 1910 / Arnold Schönberg (University Chamber Orchestra ; Herbert Butler, conductor)Reel 2: Introduction -- (3:50) Fixations : 1974 / Ramon Zupko (Steven Hesla, piano ; Gerald Fischbach, violin, Herbert Butler, cello ; Ramon Zupko, conductor
Dennis C. Curtis
No full textDennis C. Curtis returns from serving a two year mission in the Germany South Mission for the Church of Jesus Christ of Latter-day Saints. He is the son of Clayton and Vonda Lee Curtis
geology_bray-curtis
No full textGeological Bray-Curtis distance calculated from: Beicip. 1987 Geological Map of Kenya. (1987 ed. Rueil-Malmaison, France, Ministry of Regional and Energy Development of Kenya
On some properties of the Bray-Curtis dissimilarity and their ecological meaning
No full textIn this paper, we examine some basic properties of the Bray-Curtis dissimilarity as compared with other
distance and dissimilarity functions applied to ecological abundance data. We argue that the ability of
every coefficient to measure species-level contributions is a fundamental requirement. By suggesting an
additive decomposition formula for the Bray-Curtis coefficient we derive a general formula of
dissimilarity, which includes the Canberra distance and the Bray-Curtis dissimilarity as special cases. A
similar general formula is also proposed for the Marczewski-Steinhaus coefficient. Finally, using a
modified version of Dalton’s principle of transfers, we show that the Bray-Curtis coefficient and the cityblock
distance exhibit a linear response to the transfer of species abundances from an abundant plot to a
less abundant plot. At the other extreme, the chord and the Hellinger distances show an irregular and
non-monotonic behavior
Evidence for the decay B0→J/ψω and measurement of the relative branching fractions of meson decays to J/ψη and J/ψη′
No full textFirst evidence of the B 0 → J / ψ ω decay is found and the B s 0 → J / ψ η and B s 0 → J / ψ η ′ decays are studied using a dataset corresponding to an integrated luminosity of 1.0 fb -1 collected by the LHCb experiment in proton-proton collisions at a centre-of-mass energy of sqrt(s) = 7 TeV. The branching fractions of these decays are measured relative to that of the B 0 → J / ψ ρ 0 decay:frac(B (B 0 → J / ψ ω), B (B 0 → J / ψ ρ 0)) = 0.89 ± 0.19 (stat) - 0.13 + 0.07 (syst),frac(B (B s 0 → J / ψ η), B (B 0 → J / ψ ρ 0)) = 14.0 ± 1.2 (stat) - 1.5 + 1.1 (syst) - 1.0 + 1.1 (frac(f d, f s)),frac(B (B s 0 → J / ψ η ′), B (B 0 → J / ψ ρ 0)) = 12.7 ± 1.1 (stat) - 1.3 + 0.5 (syst) - 0.9 + 1.0 (frac(f d, f s)), where the last uncertainty is due to the knowledge of f d / f s, the ratio of b-quark hadronization factors that accounts for the different production rate of B 0 and B s 0 mesons. The ratio of the branching fractions of B s 0 → J / ψ η ′ and B s 0 → J / ψ η decays is measured to befrac(B (B s 0 → J / ψ η ′), B (B s 0 → J / ψ η)) = 0.90 ± 0.09 (stat) - 0.02 + 0.06 (syst)
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