1,311,743 research outputs found
Sampling procedure and potential sampling sites
Protocol for collecting environmental samples for Legionella culture during a cluster or outbreak investigation or when cases of disease may be associated with a facility.Sampling should only be performed after a thorough environmental assessment has been done and a sampling plan has been made. This protocol describes how to take standard biofilm swab, bulk water, and filter samples from commonly sampled sites.CS306411-Acdc-sampling-procedure.pd
Evaluation of Bayesian Sequential Proportion Estimation Using Analyst Labels
The author has identified the following significant results. A total of ten Large Area Crop Inventory Experiment Phase 3 blind sites and analyst-interpreter labels were used in a study to compare proportional estimates obtained by the Bayes sequential procedure with estimates obtained from simple random sampling and from Procedure 1. The analyst error rate using the Bayes technique was shown to be no greater than that for the simple random sampling. Also, the segment proportion estimates produced using this technique had smaller bias and mean squared errors than the estimates produced using either simple random sampling or Procedure 1
Effect of finite particle number sampling on baryon number fluctuations
The effects of finite particle number sampling on the net baryon number
cumulants, extracted from fluid dynamical simulations, are studied. The
commonly used finite particle number sampling procedure introduces an
additional Poissonian (or multinomial if global baryon number conservation is
enforced) contribution which increases the extracted moments of the baryon
number distribution. If this procedure is applied to a fluctuating fluid
dynamics framework one severely overestimates the actual cumulants. We show
that the sampling of so called test-particles suppresses the additional
contribution to the moments by at least one power of the number of
test-particles. We demonstrate this method in a numerical fluid dynamics
simulation that includes the effects of spinodal decomposition due to a first
order phase transition. Furthermore, in the limit where anti-baryons can be
ignored, we derive analytic formulas which capture exactly the effect of
particle sampling on the baryon number cumulants. These formulas may be used to
test the various numerical particle sampling algorithms.Comment: 9 pages 3 figure
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