The present invention pertains to vibration devices that do not require a rotating mass. In one embodiment an on-board emissions treatment system has a fill tube with a portion extending into a primary fuel fill pipe to facilitate co-fueling of the primary fuel and emissions treatment substance. With these arrangements, the detection of at least one target object appeared in more than one zone having a specific weight assigned thereto may be implemented with improved efficiency and accuracy in object selection and reduced interferences from environmental variables. These modifications to the standard registration system enable a registry to limit successive registrations of the domain name to an entity, such as a registrar, that employs the backorder service.