A plurality of scope declarations can be provided to delineate various portions of any data structure, such as a matrix, a table, or a chart. Therefore, the obstacle detection device can reduce the time required for the determination to at least one-half that provided by a related art technique, and improves the accuracy of the detection of an object moving at a relatively high speed. The method includes the steps of providing close, discard and rename functions for the data structures in the case where a newly-created data structure is being edited; providing close and copy functions for the data structures if an existing data structure is being edited; and excluding a save-as function for the data structures. To utilize the data of a sensor, the sensor data and the system which is observed is modeled using the Bayesian filtering framework. removing extraneous flows such as valve opening and closing flows from the flow envelope; extracting features from the flow envelope and monitoring signal, such as peak velocity; Producing cardiac parameters based on said monitoring signal. The isolator is connected between the stress sensitive microchip and the package.