Manufacture supplied controls are used to monitor coefficients of variation (<15% and 20% for intra-assay and inter-assay, respectively).
Monitoring coefficient of variation is one of the successful approaches to Statistical Process Control (SPC) when the process mean and standard deviation are not constants.
We monitor the coefficient of variation (c_text{v}) on the middle tomogram slice as the number N of tilt series increases; (c_text{v}) is implemented both with FBP (red diamond points, left y-axis) and wSIRT (blue circular points, right y-axis).
In these assays, in addition to the specific control samples that come with the assay kits, an in-house pooled control sample of serum obtained from healthy donors was used to monitor the coefficient of variation between assays.
When ordinary least squares (OLS) is used to estimate the simple linear regression nb i = β0 + β1 TX + ε where TX is a "new treatment" indicator variable (e.g., TX = 1 if the patient received a loop recorder and TX = 0 if the patient received a Holter monitor), the coefficient estimate of β1, call this b1, equals the difference in mean nb for the loop and Holter groups.
The results indicated that there was a relatively good correlation between both types of monitors (correlation coefficient 0.608; p < 0.001).
They proposed using multivariate (T^2) control charts to monitor all coefficients in the nonlinear model and compared several approaches in choosing the variance covariance matrix.
The ability to monitor diffusion coefficients, which report on the size distribution of heparin-derived oligosaccharides, provides a means for the investigator to quench the reaction at an optimum time to maximize the yields of larger oligosaccharides most relevant for heparin-binding studies.
In this paper, an imaging technique known as Structured Laser Illumination Planar Imaging (SLIPI) was used to monitor the extinction coefficient μe in various oil samples.
Currently, D-MRI is the only means able to measure and monitor the diffusion coefficient in vivo, with a completely noninvasive modality and without requiring exogenous contrast agents.
Constant trends for the lift and drag coefficient monitors were checked as well.
