Ljiljana Trajkovic
Simon Fraser University
Vancouver, Canada
Talk 1:

Traditional queuing theory techniques based on Poisson traffic models were essential for the development of telephone networks. Today's multimedia applications produce complex traffic patterns that result from the statistically multiplexed data, voice, image, and video patterns. For networks carrying such diverse applications, traditional traffic models have proved inadequate and incapable of capturing essential characteristics of the traffic patterns. Internet traffic characterization work has only recently been shown to be promising due to the presence of the traffic ``invariants'' detected in traffic traces.

In such an environment, computer simulation and empirical techniques play an important role in understanding networks' behavior. In this talk, I will describe the use of genuine traffic traces to simulate loss in packet networks such as Internet. Our simulation results indicate that underlying transport protocols and time scales are essential for understanding loss behavior in packet networks.

Talk 2:

Finding dc operating points, steady state, and transient responses of electronic circuits are essential tasks in electrical circuit simulation and involve solving nonlinear differential/algebraic equations. Traditional methods for solving such systems of equations often fail, are difficult to converge, and, often cannot find all the solutions. We investigate the application of homotopy methods to solving nonlinear equations describing circuits consisting of bipolar junction and MOS transistors that traditionally pose simulation difficulties. In this talk, I will describe experiments with homotopies that led to better understanding of homotopy algorithms and the behavior of nonlinear circuits, and, ultimately, to the development of better circuit simulation tools.

Ljiljana Trajkovic (S'78 - M'86 - SM'95) received the Dipl. Ing. degree in her native Yugoslavia in 1974, M.Sc. degrees in electrical engineering and computer engineering from Syracuse University in 1979 and 1981, respectively, and a Ph.D. degree in electrical engineering from UCLA in 1986. Dr. Trajkovic is currently a Professor in the School of Engineering Science at Simon Fraser University, Burnaby, British Columbia, Canada. From 1995 to 1997, she was an NSF Visiting Professor in the Electrical Engineering and Computer Sciences Department at UC Berkeley. She was a Research Scientist at Bell Communications Research, Morristown, NJ from 1990 to 1997 and a Member of the Technical Staff at AT&T Bell Laboratories, Murray Hill, NJ from 1988 to 1990.

Her research interests include high-performance communication networks, computer-aided circuit analysis and design, and theory of nonlinear circuits and dynamical systems.

Dr. Trajkovic is currently serving on the Board of Governors of the IEEE Circuits and Systems Society and the IEEE Systems, Man, and Cybernetics Society. She was Chair of the IEEE Technical Committee on Nonlinear Circuits and Systems (1998). She is currently a Chair of the IEEE Circuits and Systems Society joint Chapter of the Vancouver/Victoria Sections. She also serves on various technical committees of IEEE conferences. She is Technical Program Co-Chair of ISCAS 2005. She served as Technical Program Chair and Vice General Co-Chair of ISCAS 2004.

She is an Associate Editor of the IEEE Transactions on Circuits and Systems, Part I. She was an Associate Editor of the IEEE Transactions on Circuits and Systems, Part II (1999 - 2001 and 2002 - 2003), the IEEE Circuits and Systems Magazine (2001 - 2003), and the IEEE Transactions on Circuits and Systems, Part I (1993 - 1995).