A system and method are disclosed for detecting intrusions in a host system on a network. Each of the upper and lower arms are dimensioned for at least partial insertion into a patient’s vagina, and when so inserted, are dimensioned to exert pressure on at least upper and lower portions of an inner surface of the patient’s vaginal wall. The other ends of the optical fibers are connected to one end of each of polarization maintaining optical fibers with their polarization axis displaced by an angle of 45\xb0 from each other. In instances when the particular performance indicator is above the determined threshold, the first power may be set to a second value and the second power may be set to a non-zero value. The compaction method is a combination of two main procedures: one for the selection of essential test stimuli and the other for the elimination of redundant test stimuli, and effective in minimizing any set of test stimuli without modifying any of the test stimuli.