An abrasion device and method for delivery of substances into the skin using a microabrader for delivering a substance into the skin are disclosed. The disk drive searches for TMs within a fixed TM search window which extends past the TM on the disk. ; then heating to 230\u02dc236\xb0 C. The server switching device includes a unit for identifying a server pointed to by a port number specified in a service request to transfer the service request and a unit for acquiring the new communication address acquired by the client switching device. Each, transmitter-receiver group consists of one transmitter assembly and two receiver assemblies. Although this architecture as developed for a turbo decoder, all convolution codes can use the MAP algorithm of the present invention.