An object-presence alert is given to a driver by a vehicular side-object detection system in response to a remote sensor for sensing objects in a predetermined zone of interest along side a vehicle. An initial enhanced point is set to a noisy point obtained from the signals. The sleeve may have spring-like flexibility and be stretched open at the slit sufficiently to permit insertion of the ferrule in the sleeve. This read-out continues while data is present in the buffer. Such an arrangement thus increases wafer uniformity and precision process control during wafer fabrication and etching. A protruding features engages a recess to retain the engaged structural members.