A New Data-Reduction Algorithm for Real-Time ECG Analysis

Typically the ECG is sampled at a rate of 200 samples/s or more, producing a large amount of data that are difficult to store, analyze, and transmit. Data-reduction algorithms that operate in real time reduce he amount of data without losing the clinical information content. They must also leave sufficient computation time available for ECG analysis. We describe here a new algorithm called CORTES that is suited for such real-time applications. This algorithm combines the best features of two other techniques called TP and AZTEC. We present the results of a study to find optimal experimental values for the controlling variables in CORTES. We compare the computations of root-mean-square reconstruction errors for a diversity of encoded ECG signals.     

A review of recent hidden surface removal techniques

Techniques for the removal of hidden surfaces and/or hidden lines from computer generated pictures have continued to be developed and to be applied in other areas. This review covers much recent work in removal methods and some of the newer applications. A broad classification of the many references is given.     

Enrichment of rare gas isotopes using a quadrupole mass spectrometer

A small quadrupole mass spectrometer was operated in the static mode to enrich selected rare gas isotopes. Memory effects in the apparatus were observed and attributed to the re-emission of atoms implanted by the electron-impact ion source. Studies of the pumping mechanism led us to a practical means for reducing the rate of noble gas pumping