I thank Hafsah Mughal, my wonderful grad student whose help was invaluable in preparing tonight's lecture; Dr. Wenge Zhu who organized this course; Dr. Rong Li, our department chairman; my home office technical assistant Anjela Bachman; IT guru Jay Wind for loading the graphics; my husband Bob Weiner; overall graduate student program director Dr. Jack Vanderhoek for very helpful guidance; and his teaching assistant Juntian Wei for tonight's course Webex direction.