Rune Hjelsvold
Gjφvik University College [1]
Gjφvik, Norway
<runehj@hig.no>
Subu Vdaygiri
Siemens Corporate Research, Inc.
Princeton, New Jersey, USA
<subuv@scr.siemens.com>
[1]The work described in this chapter was performed while the author was affiliated with Siemens Corporate Research, Inc.