Abstract Even in the field of electromagnetic compatibility, low measurement uncertainty means high quality. Although there are standardized procedures for obtaining such a measurement, which facilitate estimation, modern approaches show further reduction possibilities. The paper presents an alternative approach to reducing instrument case interference based on many years our experience and lar...

With the advent of commercial image-guided radiotherapy, daily correction of the setup uncertainty is feasible. It is beneficial to understand the dependence of the probability density function (pdf) of the corrected setup variation on the action level, localization uncertainty and re-positioning uncertainty so that an appropriate action level is used. Also, that pdf can be used in treatment pl...

We examine the measurement uncertainty associated with different methods of calibrating the ubiquitous down-the-road (DTR) radar used in speed enforcement. These calibration methods include the use of audio frequency sources, tuning forks, a fifth wheel attached to the rear of the vehicle with the radar unit, and the speedometer of the vehicle. We also provide an analysis showing the effect of ...

This article presents the results associated to calibration and evaluation of the measurement uncertainty of a digital respiratory pressures measuring system developed at the Biomedical Engineering Research & Development Laboratory (NEPEB) of the Department of Electrical Engineering – UFMG. The proposed method uses the least squares weighted regression to establish the measurement model and to ...

Metrology is concerned with the establishment of measurement units and the transfer of measurement standards to industry. International comparability of measurement results requires internationally agreed guidelines for specific measurement tasks and a standardised treatment of measurement uncertainties. To this end, the Guide to the Expression of Uncertainty in Measurement (GUM) provides the f...

Coordinate metrology generates important software issues. After measurement data are collected in the form of position vectors, the data analysis software must derive the necessary information from the set of points. Uncertainty is an important issue in this data analysis. When extreme fit approaches are employed for form error evaluation, the uncertainty is closely related to the sampling of m...