1. Roux Institute at Northeastern University,Khoury College of Computer Sciences,Portland,ME,USA,04106
2. Purdue University Northwest,Electrical and Computer Engineering Department,Hammond,IN,USA,46323
3. Illinois State University,Electrical and Computer Engineering Department,Normal,IL,USA,61761
4. University of North Dakota,School of Electrical Engineering and Computer Science,Grand Forks,ND,USA,58201