Abstract: The problem of providing and interacting with a number of different security mechanisms in a clustered data processing environment is solved by providing a Mechanism Abstract Layer which presents a consistent interface to applications running on the various nodes within the cluster. Mechanism Pluggable Modules are provided for each security mechanism that one wishes to employ. The Pluggable Modules provide a mechanism for mapping individualized security mechanism parameters through an interface with the Mechanism Abstract Layer. This provides a consistent interface for applications running on the nodes and it also avoids costly adaptations that would otherwise be necessary to accommodate new security mechanisms or variations in prior security mechanisms.

Abstract: The problem of providing and interacting with a number of different security mechanisms in a clustered data processing environment is solved by providing a Mechanism Abstract Layer which presents a consistent interface to applications running on the various nodes within the cluster. Mechanism Pluggable Modules are provided for each security mechanism that one wishes to employ. The Pluggable Modules provide a mechanism for mapping individualized security mechanism parameters through an interface with the Mechanism Abstract Layer. This provides a consistent interface for applications running on the nodes and it also avoids costly adaptations that would otherwise be necessary to accommodate new security mechanisms or variations in prior security mechanisms.

Abstract: The specification discloses a radar sensor for detecting short-range, slowly moving objects and using the range versus time data to develop a prediction of the time at which the range of the object will be at a minimum to the sensor. The sensor uses a pulse transmission of a radio frequency signal with object reflections being received and detected. Subsequent signal processing eliminates returns from clutter and stationary objects so that signals from low velocity objects can be detected. Computations are performed in a digital processor to compute an estimate of the time and of the range when the object will be closest to the sensor.