Disclosed is a method and apparatus for aligning clock domains over an asynchronous network between a source controlled by a first clock and a destination controlled by a second clock. Further, a testing system for measuring vascular pressures according to the present invention includes a pressure applicator, a pressure sensor, and a diagnostic test unit. The horizontal stem is an exemplary designed triangular in shape to capture more of the backfill soil than typically what soil backfill rest directly above the horizontal stem or counterweight portion. The resulting polyglycerol polyesters have outstanding aesthetics and physical properties. The testing steps are temporally independent of one another and may thus be effected also during the operation.