sponsored by the Circuit Theory Group ...[et al.]. sponsored by the IEEE Circuit Theory Group. sponsored by the Working Group on Tube Techniques ...[et al.]. sponsored by the Optical Society of America ... [et al.]. sponsored by the IEEE Power Group. sponsored by The Packaging Group Inc. sponsored by the Texas Agricultural Experiment Station ... [et al.]. sponsored by the IEEE Circuits and Systems Society. sponsored by the IEEE Power Electronics Council ... [et al]