This paper describes an instrument capable of detecting flaws in "green-state" (prior to sintering) powder metallurgy (P/M) parts. The instrument uses a matrix of impedance measurements from a multiprobe array which contacts the surface of the P/M part. The array of measured data is processed to not only detect the presence of flaws, but also determine their location, size, and orientation. Exp...

It is well known that measurement error of numerical measurements can be divided into a systematic and a random component and that only the latter component is estimable if there is no gold standard or reference standard available. In this paper, we consider measurement error of nominal measurements. We motivate that, on a nominal measurement scale too, measurement error has a systematic and a ...

UNLABELLED This work applied a propagation of uncertainty method to typical total suspended particulate (TSP) sampling apparatus in order to estimate the overall measurement uncertainty. The objectives of this study were to estimate the uncertainty for three TSP samplers, develop an uncertainty budget, and determine the sensitivity of the total uncertainty to environmental parameters. The sampl...

Nonlinear Control Seminar Robustness of Minimax Controllers to Nonlinear Perturbations Gregory J. Toussaint 19 Nov 99 Paper: Z. Pan and T. Ba sar. Robustness of minimax ontrollers to nonlinear perturbations. Journal of Optimization Theory and Appli ations, 87(3):631{678, De ember 1995. Introdu tion Problem Formulation Perfe t State Measurement Imperfe t State Measurement Extension to Nominal No...

Democracy has been defined in various ways by different people including government of the people, by the people and for the people, government with the consent of the governed, and a form of regime that derives from popular sovereignty in which ordinary citizens are endowed with the right and ability to govern themselves. It is my contention that concepts may have real, nominal and operational...

Limited data feedback rate, e.g. 1-10 samples per second instead of 25-60, causes adverse effect on wide-area damping control (WADC). An observer driven system copy (OSC) approach is suggested here to deal with low data rates. The basic idea is to use the knowledge of nominal system dynamics to approximate the actual system behavior during intervals when data from phasor measurement units (PMUs...

The non-invasive measurement of cerebral oxy- (DeltaHbO(br)2) and deoxy-haemoglobin (DeltaHHb(br)) changes using near-infrared spectroscopy instruments is often affected by the absorption in the extracerebral layer. We have exploited the multivariate calibration (partial least squares, PLS) method to minimize the errors for a range of blood volume, oxygen saturation and extracerebral layer thic...

The Mixed Stain Study 3 (MSS3) interlaboratory challenge exercise evaluated the 2001 performance of STR multiplex DNA typing systems using a set of seven DNA extracts of designed concentration and composition. This initial report focuses on the linkages connecting the measurement of the concentration of DNA ([DNA]) to the observed STR multiplex signal intensities. There is a causal relationship...