A containment mechanism provides for the grouping and isolation of multiple processes running on a single computer using a single instance of the operating system. A process for treating NOx in a diesel exhaust gas comprises absorbing the NOx in a solid absorbent and regenerating the absorbent by contacting it with CO-enriched gas. A processor continuously processes received ECG signals and analyzes the received ECG signals for pre-defined arrhythmia. Measured and simulated results demonstrate various aspects of the subject disclosure. The application modules can be readily and conveniently removed from and assembled to the base unit. Structured data includes data stored in a database management system, as well labeled files.