The present invention provides a modeling technique with improved modeling accuracy. The inline spectrophotometer is inside of a printer and configured to measure printer output. Particularly, the selection of these single-cell halftone screens is determined by satisfying moir-free conditions provided in the respective spatial or frequency equations. Inflation of the vehicle rear side wall of the airbag toward the driver is regulated via the tether. The transmitter is adapted to initiate, prior to the check processor completing the determination whether the encoded data unit has been correctly received, the transmission of an acknowledgment message comprising a frame having a plurality of different fields of data. The present invention also provides a process for preparing a vinylphosphate comprising reacting an enolizable ketone with a sterically hindered Grignard reagent and a halophosphate diester.