Dariusz Chaberski
PRECISE TIME-INTERVAL GENERATOR

The paper presents the design of high resolution TI (Time-Interval) generator implemented into FPGA (Field-Programmable-Gate-Arrays) device, their construction and experimental test results. The resolution improvement is guaranteed by a chain of digitally-controlled delay-elements. Presented TI generator posses two modes of operation. The first mode allows for precise time-interval generation. In the second mode TIs of specified Gaussian distribution may be generated.

I. Frollo, A. Krafčík, P. Andris, J. Přibil, T. Dermek
PLANAR MAGNETOSTATIC MODEL OF SOFT MAGNETIC OBJECTS IN HOMOGENEOUS MAGNETIC FIELD OF AN NMR IMAGER

Liquid samples with magnetic particles ingredients were placed into the homogenous magnetic field of an imager based on nuclear magnetic resonance.
Theoretical computations based on a magnetostatic models were performed. For experimental verification an MRI 0.2 Tesla ESAOTE Opera imager was used. For modelling and experiments two samples - rectangular and circular were tested. The resultant images corresponds to the magnetic field variations in the vicinity of the samples.

Paul-Gerald Dittrich, Dietrich Hofmann
PHOTONIC MICRO SENSORS FOR MOBILE COLOR AND SPECTRAL CHARACTERIZATION OF COLORED LIQUIDS IN LABORATORIES AND IN FIELD

Aim of the paper is to show that the colorimetric characterization of optically clear colored liquids can be performed with so called dielectric-interference multi-spectral micro sensors in comparison to spectral sensors. Multi-spectral micro sensors and spectral sensors are differentiated by their spectral resolution, measurement speed, accuracy and cost. Multi-spectral micro sensors are less expensive. The paper describes how dielectric-interference multi-spectral micro sensors are calibrated with application specific calibration methods and conventional liquid color standards, methodically and theoretically. The paper proofs that and how dielectric-interference multi-spectral micro sensors can be applied with smartpads for the calculation of measurement results both in laboratory and in field. A given practical example is the application for the colorimetric characterization of petroleum oils and fuels and their colorimetric characterization by the Saybolt color scale.

Pasquale Arpaia, Marco Buzio, Luca De Vito, Mario Kazazi, Stephan Russenschuck
UNCERTAINTY ANALYSIS FOR A MOVING FLUXMETER

This paper presents an uncertainty analysis for field measurements by means of a moving fluxmeter. The measurement method has been analysed and the most relevant uncertainty sources have been characterised. Among all the sources, it has been found that those concerning the transport system lead the most relevant contribution to the uncertainty budget. Experimental results, aiming at characterising such sources and determining their contribution to the uncertainty of the measurement, are presented.

G. Betta, D. Capriglione, M. Corvino, M. Gasparetto, C. Liguori, A. Paolillo, E. Zappa
METROLOGICAL PERFORMANCE COMPARISON OF BIOMETRIC SYSTEM ARCHITECTURES FOR 3D FACE RECOGNITION

Different biometric system architectures based on 3D images can be realized for face recognition. In such systems the triangulation of images provided by a couple of 2D cameras is employed to achieve the 3D features of a face. To setting up the system, different positioning of cameras as well as both kind and resolution of camera could be considered. These parameters can affect the correct decision rate of the system in classifying the input face, especially in presence of image uncertainty.
In previous papers, the authors proposed an original approach for the estimation of the confidence level of results provided by classification systems for face recognition. Such approach is here adopted in order to compare several 3D architectures differing in camera specifications and geometrical positioning.