An automatic multichannel generalized system for frequency measurement

Multichannel ECG measurement system

Multichannel ECG is an important instrumentation for experimental and clinical electrophysiology. Both the software and the front-end design issues are described for a 128 channel system which can record the signals up to 100 seconds. The basic analysis and presentation of the acquired ECG signals are also given with examples of body surface potential maps. Thanks to the frequency response of t...

Optimizing frequency and number of controls for automatic multichannel analyzers.

Sampling strategy fundamentally influences the effectiveness of quality control with control charts. This study shows a simple approach for optimizing the control strategy for automatic multichannel analyzers that takes into account cost-efficiency considerations. Our main focus is on the frequency of controls necessary. The methods used are based on a field study (on a Hitachi/BM 747), the vie...

Accuracy of an Intraoral Digital System for File Length Measurement

Introdouction: Canal length measurement is essential for proper endodontic treatment. Any error or miscalculation in working length determination, particularly in curved canals, can result in complications during or after root canal therapy. Digital radiography has enabled accurate measurement of curved canal length. In this study, we evaluated the accuracy of calibration of a complementary m...

An Automatic Tree Ring Measurement System

This paper describes a robust and portable tree ring parameter measurement system, which has a potential of surpassing state-of-the-art systems. A radially movable hand-held scanner is utilized. The problem of different vertical resolution in the image is handled using vertically adaptive filters in the subimages. A two-step segmentation strategy is taken. The periodicity of tree rings is first...

An Automatic Real Time Impedance Matching System for Use in an RF Electrostatics Accelerator Ion Source