41,870 research outputs found
Dr. Paul K. Edmonds
No full textDr. Paul K. Edmonds was extension area coordinator for the Uintah Basin Center (UBCCE)
Caos e simetrias em sistemas quanticos
No full textDissertação (mestrado) - Universidade Federal de Santa Catarina. Centro de Ciencias Fisicas e MatematicasNeste trabalho são investigadas algumas propriedades espectrais de dois sistemas quânticos não separáveis: o hamiltoniano de Henon-Heiles e o oscilador harmônico bidimensional com perturbação sugerida por Pullen e Edmonds do tipo x2y2. Foi confirmado que estes sistemas apresentam uma transição do comportamento quântico regular para o comportamento quântico irregular, também chamado caótico, através do estudo da sensibilidade dos níveis a pequenas mudanças na perturbação. Estes resultados foram obtidos com melhor precisão do que os já publicados na literatura. Tanto na obtenção do espectro de energias quanto na própria análise da sensibilidade, a utilização dos grupos de simetrias destes sistemas quânticos foi muito importante. Assim, este trabalho contém um estudo detalhado das simetrias de sistemas quânticos em geral e sua aplicação no estudo dos hamiltonianos citados
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)
Expanding the scale of aquatic sciences: The role of the National Ecological Observatory Network (NEON)
No full textCitation: Goodman, K. J., Parker, S. M., Edmonds, J. W., & Zeglin, L. H. (2015). Expanding the scale of aquatic sciences: The role of the National Ecological Observatory Network (NEON). Freshwater Science, 34(1), 377-385. doi:10.1086/679446The current and future direction of aquatic ecological research leans toward addressing questions that cover multiple scales and levels of complexity. Historically, the ability to do comparative aquatic research across large spatial and temporal scales has been impeded by a lack of comparable measurements, standard methods, and a well organized data management and retrieval system. The National Ecological Observatory Network (NEON) is the first continental-scale ecological observation system designed to collect and provide freely available data on the drivers and responses of ecological change. In this paper, we describe past and present attempts to work across multiple scales in aquatic ecology, and the potential use of NEON aquatics data and infrastructure by researchers to integrate and expand ecological research programs and address novel ecological questions. © 2015 by The Society for Freshwater Science
The concept of the contemporary author in case of J. K. Rowling
No full textThe concept of the contemporary author in case of J. K. Rowling The diploma thesis deals with the contemporary concept of the author which is examined on the specific case of Joanne Kathleen Rowling. The theoretical part of the thesis focuses on the biography of the author and the previous philosophical theories concerning the concept of the author and his/her role in the identity of the literary work. The main authors of the theories are Roland Barthes, Michel Foucault, and Umberto Eco, whose concept is crucial for this thesis. The research part presents specific styles of writing which are characteristic for authors and applies this theory to the analysis of two literary works of J. K. Rowling. The conclusion of the thesis is the summary of the research and an attempt to define the concept of the contemporary author. Key words The author, authorship, literary work, pseudonym, the concept of the author, style of writing, J. K. Rowling, Robert Galbraith, Roland Barthes, Michel Foucault, Umberto Ec
Measurement of the B0–B0 oscillation frequency Δmd with the decays B0→D−π+ and B0→ J/ψK∗0
No full textThe B
0
–B
0
oscillation frequency Δmd is measured by the LHCb experiment using a dataset corresponding
to an integrated luminosity of 1.0 fb−1
of proton–proton collisions at √
s = 7 TeV, and is found to be
Δmd
=0.5156±0.0051 (stat.)±0.0033 (syst.) ps−1
. The measurement is based on results from analyses
of the decays B
0
→ D
−π
+ (D
−
→ K
+π
−π
−) and B
0
→ J/ψK
∗0
(J/ψ →μ
+μ
−,K
∗0
→ K
+π
−) and
their charge conjugated modes
P A CERTAIN CLASSES OF MEROMORPHIC MULTIVALENT FUNCTIONS WITH RESPECT TO (j, k)-SYMMETRIC POINTS
No full textAbstract: The author introduces new class of p−valent meromorphic multivalent analytic function with respect (j, k)-symmetric points. Integral representation and inclusion relations for functions in these classes are obtained
Measurements of J/psi decays into omega K(K)over-bar pi, phi K(K)over-bar pi and eta K(s)(0)K(+/-)pi(-/+)
No full textThe decays of J/psi ->omega K (K) over bar pi and J/psi ->phi K (K) over bar pi are studied using 5.8x10(7) J/psi events collected with the Beijing Spectrometer (BESII) at the Beijing Electron-Positron Collider (BEPC). The K(S)(0)K(+/-)pi(-/+) and K(+)K(-)pi(0) systems, produced in J/psi ->omega K (K) over bar pi, have enhancements in the invariant mass distributions at around 1.44 GeV/c(2). However, there is no evidence for mass enhancements in the K (K) over bar pi system in J/psi ->phi K (K) over bar pi. The branching fractions of J/psi ->omega K(S)(0)K(+/-)pi(-/+), phi K(S)(0)K(+/-)pi(-/+), omega K*(K) over bar +c.c., and phi K*(K) over bar +c.c. are obtained, and the J/psi ->eta K(S)(0)K(+/-)pi(-/+) branching fraction is measured for the first time.Astronomy & AstrophysicsPhysics, Particles & FieldsSCI(E)0ARTICLE3null7
Measurement of the branching fraction
No full textThe 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
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