Having successfully completed two EURAMMET Key Comparisons (EUROMET Project No. 384 and Project 812) with very good results led us as TUBITAK UME Dimensional Laboratory to organize the first interlaboratory comparison on calibration of diameter standards in Turkey as a pilot laboratory during 2012 and 2013. Interlaboratory comparisons are one of the best ways to disseminate SI units within the country, thus assuring the reliability and quality of calibrations and their results for accredited/non-accredited laboratories. The main purpose of the comparison is to demonstrate the differences between the capability of the laboratories and their uncertainty declarations on accreditation scopes.
12 accredited laboratories which provide routine calibration services to the industry, participated in the comparison. The standards to be calibrated were one ring gauge of diameter 40 mm, one plug gauges of diameters 50 mm, one sphere of diameter 25 mm and a pin gauge of diameter 2.5 mm. The measurand is the diameter of transfer standards in a given measurement direction at different heights, determined for each standard. All measuring instruments used by the participating laboratories are commercially available universal measurement devices. Determination of the statistical consistency of the results with the uncertainties given by the participants can be assessed by the method of “E_n” value assessment for each laboratory. “E_n” values for all measurement results between pilot and each participated laboratory is calculated.
In this paper the comparison method and results are explained and “E_n” values of the participants are presented.

The performance tests described in ISO 10360series are too complicated to be executed in high frequency. The simplified test on the scale errors and the angular errors is proposed. In this article, the simplified artefacts with some balls are located at some different locations on CMM and are measured by CMM. The results are compared in the difference of the artefacts and the locations. In the comparison, the uncertainties of the performance test are considered.

This paper presents a method and procedure for characterizing the metrological structural resolution (MSR) of CT systems. The method is based on the frequency response analysis on sinusoidal surfaces. The procedure involves performing evaluations with multiple voxel sizes. To test the method, a comparative evaluation of two CT measuring systems was performed. The results demonstrate the potential of the proposal for assessing the metrological structural resolution of CT systems.

The research reported in this paper is related to the ultra-wide-band radar technology that may be employed in care services for elderly people. Four methods, based on singular value decomposition of matrices, designed for extraction of useful signals from clutter-corrupted data, acquired by means of an ultra-wide-band radar sensor, have been compared. The uncertainty of estimation of echo parameters, performed using the extracted signals, has been used as the criterion of comparison.

An EMFi sensor based measurement system for monitoring of respiration and heart rates of an infant is developed in this study. The EMFi sensor is located in the crib between the mattress and sheet and the infant is sleeping on top of the sensor. The EMFi sensor was found to be functional especially in the measurement of respiration rate. The measurement system developed in this study is unobtrusive and comfortable for the infant and no wire attachments are needed.