44,548 research outputs found
Quarkonium production at ATLAS
The production of quarkonium is an important testing ground for QCD
calculations. The J/\psi\ and \Upsilon\ production cross-sections are measured
in proton-proton collisions at a centre-of-mass energy of 7~TeV with the ATLAS
detector at the LHC. Differential cross-sections are presented as a function of
transverse momentum and rapidity. The fraction of J/\psi\ produced in B-hadron
decays is also measured and the differential cross-sections of prompt and
non-prompt J/\psi\ production determined separately. Measurements of the
fiducial production cross-section of the \Upsilon(1S) and observation of the
\chi_{c,bJ} states are also discussed.Comment: Presented at the 2011 Hadron Collider Physics symposium (HCP-2011),
Paris, France, November 14-18 2011, 3 pages, 8 figure
W/Z properties and V+jets at the Tevatron
We present a summary of recent measurements of and properties and
production in association with jets in collisions at
TeV with the CDF and D\O\ detectors. Latest measurements of
transverse momentum and are presented along with new measurements
of the angular distributions of final state electrons from Drell Yan events as
a way to probe boson production mechanisms. The mass dependence of the
forward-backward asymmetry in interactions is measured, the effective weak mixing angle extracted,
and the most precise direct measurement of the vector and axial-vector
couplings of and quarks to the boson presented. New measurements of
jets produced in association with and bosons for inclusive, beauty and
charm jets are also discussed.Comment: Presented at the 2011 Hadron Collider Physics symposium (HCP-2011),
Paris, France, November 14-18 2011, 4 pages, 13 figure
Production of charm and charmonium with the ATLAS detector at 7 TeV
We report on the observation of the charm mesons D^\ast \pm, D^\pm and D_s
^\pm with 1.4 nb^-1 of data, and of the J/psi-->mu+mu- resonance with 78 nb-1
of data from the ATLAS detector in 7 TeV proton-proton collisions at the LHC.
The resultant signals support the high performance of the ATLAS detector as
predicted from simulation and prospects for future measurements in the charm
and charmonium sector.Comment: 4 pages, 11 figure
Lean healthcare assets challenge FM performance measurement conventions
Purpose;
To show how Lean Asset thinking can be applied to health care facilities using different measures to compare the estates contribution to the business of health care providers. The challenge to conventional wisdom matches that posed by Lean Production to Mass Manufacturing.
Methodology;
Data Envelope Analysis examines the income generated and patient occupied area as outputs from the Gross Area of a Trust’s estate.
Findings;
The approach yield strategic comparisons that conventional FM measures of cost per m2 hide. The annual cost of an excess estate is conservatively estimated at £600,000,000(in England alone)
Research limitations/implications;
Further research to understand the causes of the excess is needed and is in hand. Meanwhile the research illustrates the power of an alternative way of assessing facilities performance.
Practical implications
Have already been demonstrated in two trusts who have used such an analysis to define strategic estates targets,
Originality.
The author’s are not aware of the Lean Asset perspective previously being applied to
healthcare facilities. The research shows the underlying fallacy of relying on cost per m2 as the primary measure of asset performance.</p
Interstitial lung disease : raising the index of suspicion in primary care
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The introduction of microfiche for disseminating technical information in the United States
Development of microfiche for disseminating technical informatio
Feedback laws for fuel minimization for transport aircraft
The Theoretical Mechanics Branch has as one of its long-range goals to work toward solving real-time trajectory optimization problems on board an aircraft. This is a generic problem that has application to all aspects of aviation from general aviation through commercial to military. Overall interest is in the generic problem, but specific problems to achieve concrete results are examined. The problem is to develop control laws that generate approximately optimal trajectories with respect to some criteria such as minimum time, minimum fuel, or some combination of the two. These laws must be simple enough to be implemented on a computer that is flown on board an aircraft, which implies a major simplification from the two point boundary value problem generated by a standard trajectory optimization problem. In addition, the control laws allow for changes in end conditions during the flight, and changes in weather along a planned flight path. Therefore, a feedback control law that generates commands based on the current state rather than a precomputed open-loop control law is desired. This requirement, along with the need for order reduction, argues for the application of singular perturbation techniques
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