Fall 2011 Seminars
August 30, 2011
Co-Author: Dr. Orlando R. Baiocchi, University of Washington, Tacoma
Title: Tenure: past, present, and future
Abstract: Tenure for college and university faculty members has long been a topic that has been hotly debated. Decades ago many of their institutions had mainly a teaching focus. In some cases tenure would be awarded after a probationary period of five or six years and might have been announced by a letter in the mail. Nevertheless, it was not uncommon for some faculty who were moderately or heavily involved in teaching to also produce some significant research results. Many faculty and administrators were aware of the advantages of producing research results simply by observing the work of their peers at established research-oriented universities. The standards of these institutions were admired and gradually were put in place, at least partially, at more and more colleges and universities. This might have been done simply in the name of “progress.” Research accomplishments and notoriety also improved the prestige of an institution. And this, it seems, has also led to public recognition or acceptance of the importance of faculty research as a measure of institutional quality, especially by students and parents involved in the choice of an institution for undergraduate studies. At the same, in the United States, a large number of applicants are available for each faculty opening. These factors have come together to increase expectations for faculty performance and the development of elaborate criteria for evaluating an applicant for a faculty position and for the subsequent award of tenure. Measured in terms of teaching, research, and service, these expectations are rapidly becoming common throughout the educational world, even internationally. The authors can point to their experience in Brazilian universities. Today these standards determine the working environment and even the lifestyles of college and university faculty members.
ORLANDO R. BAIOCCHI is Professor of Electrical and Computer Engineering, Institute of Technology, University of Washington Tacoma. He earned the B.Sc. in both E.E. and C.E. from the University of Rio Grande do Sul, Brazil, the M.S.E.E. from the University of Rio de Janeiro, Brazil, and the Ph.D. in E.E. from University College London, U.K.
September 27, 2011
Guest speaker: Dr. Wei-Jen Lee
Title: IEEE/NFPA Arc Flash Phenomena Collaborative Research Project
Abstract: Though electrical incidents represent a relatively small percentage of all work-related incidents, they are disproportionately fatal and, in the case of burns, may result in extended hospitalization and rehabilitation. On average, approximately 5 to 10 arc flash explosions occur on the job every day in the United States. Proper protection is the key to reduce casualties during these incidents. IEEE 1584 and NFPA 70E are developed to protect the safety of the workers. Several areas of arc flash phenomena need further research and testing validation.
The IEEE and the NFPA (National Fire Protection Association) have joined forces on an initiative to fund and support research and testing to improve the understanding of arc flashes. The results of this collaborative project will provide information that will be used to improve electrical safety standards, predict the hazards associated with arcing faults and accompanying arc blasts, and provide practical safeguards for employees in the workplace. The identified areas include but are not limited to: 1) Heat and Thermal Effects, 2) Blast Pressure, 3) Sound, and 4) Light intensity.
As the project manager of this collaborated effort, this presentation will cover the basic understanding of the arc flash and the procedures that have been carried out to provide information for the updating and clarifications of arc flash standards.
Speaker bio: Wei-Jen Lee (S’85-M’85-SM’97-F’07) received the B.S. and M.S. degrees from National Taiwan University, Taipei, Taiwan, R.O.C., and the Ph.D. degree from the University of Texas, Arlington, in 1978, 1980, and 1985, respectively, all in Electrical Engineering. In 1985, he joined the University of Texas at Arlington, where he is currently a professor of the Electrical Engineering Department and the director of the Energy Systems Research Center. He has been involved in the revision of IEEE Std. 141, 339, 551, and 739. He is the Vice Chair-Paper of the IEEE/IAS, Industrial & Commercial Power Systems Department (ICPSD) and the associate editor of IEEE/IAS and International Journal of Power and Energy Systems. He is the project manager of IEEE/NFPA Collaboration on Arc Flash Phenomena Research Project. Prof. Lee has been involved in research on utility deregulation, renewable energy, smart grid, microgrid, arc flash, load forecasting, power quality, distribution automation and demand side management, power systems analysis, online real time equipment diagnostic and prognostic system, and microcomputer based instrument for power systems monitoring, measurement, control, and protection. He has served as the primary investigator (PI) or Co-PI of over ninety funded research projects. He has published more than two hundred and thirty journal papers and conference proceedings. He has provided on-site training courses for power engineers in Panama, China, Taiwan, Korea, Saudi Arabia, Thailand, and Singapore. He has refereed numerous technical papers for IEEE, IET, and other professional organizations. Prof. Lee is a Fellow of IEEE and registered Professional Engineer in the State of Texas. More info about the speaker: http://www-ee.uta.edu/esrc/lee.htm.
October 18, 2011
Title: Desynchronization: design for verification
Abstract: Desynchronization is used to synthesize asynchronous circuits from synchronous specifications. Controller networks used for desynchronization are highly nondeterministic and are not easily amenable for verification. We adapt the desynchronization controllers for verifiability by imposing additional sequential dependencies among controller events that reduces nondeterminism. We deduce properties of the adapted controllers, which we use to develop methods for reachability analysis and verification of desynchronized circuits. The methods are demonstrated using seven desynchronized processor models.
October 20, 2011
Guest Speaker: Ronghua Yu
Title: Impedance-based wireless sensor network for metal-protective coating evaluation
Abstract: Researches have been focused on the influences of flowing fluid on the corrosion of bare metals, but there is little emphasis on the degradation of metal-protective coating. Evaluating the metal-protective coating usually uses the Electrochemical Impedance Spectroscopy (EIS) method. EIS is a technique used for evaluating coating permeability or barrier performance based on the electrical impedance of coating. This paper presents a new impedance-based wireless sensor network for metal-protective coating evaluation. This wireless sensor network consists of two parts: impedance-based wireless sensor nodes and a wireless data base that are equipped with a network analyzer (AD5933) and a RF transceiver (CC1111/CC1110). In the experiment, there are three coating panels immersed in flowing deionized water (DI water) and one coating panel immersed in stationary DI water. Experimental results demonstrate that the proposed wireless sensor network is capable to evaluate the coating degrading.
November 8, 2011
Cosme E. Rubio, Visiting Professor
Title: Simulation of periodic segmented waveguide using the 2D finite element method
Abstract: A numerical analysis of periodic segmented waveguides (PSWs) using the two dimensional finite element method (2D-FEM) in the frequency domain is presented. This method has significantly lower computational cost when compared with 3D methods that have been used to model PSWs, and can also model back reflected signals. Unlike photonic crystal waveguides (PCWs), light confinement in a PSW is due to total internal reflection as in a continuous waveguide (CWG). We show that the dispersion relation of the guided modes in PSW is strongly influenced by the dielectric periodicity along the waveguide. We calculate the mode profile of the PSW in a region far away from the band gap and we showed that it is comparable with the mode profile of their equivalent CWG even for relatively high values of averaged refractive index contrast.
November 22, 2011
Guest speaker: Dr. Morr Reyhani
Title: An Implanted Head Model Exposed to Electromagnetic Fields at a Mobile Communication Frequency
Abstract: Can cellular phones and personal communication systems base station antennas affect the active or passive implantable medical devices adversely? Concerns over the possible harmful effects of non-ionizing irradiation upon implanted medical devices have been present for many years. Key issues to address are the questions of whether mobile phones have a detrimental effect on implants, and how the interaction of the handset with the body can be minimized in order to both alleviate public fears and improve handset antenna performance and new antenna and implant designs. This presentation outlines a thorough investigation of the scattering of an electromagnetic wave from a perfectly conducting implant of electrically small radius, embedded eccentrically into a dielectric head model by a dipole antenna. The dyadic Green’s function for spherical vector wave functions is employed. Analytical expressions for the scattered fields of an implant embedded head model are derived. Numerical results from analytical expressions are computed for this problem and compared with the results from the same model using the finite-difference time-domain (EMU-FDTD) electromagnetic simulator developed for this research.
Speaker bio: Morr Reyhani received the B.Eng. (Hons) degree in electrical and electronic engineering from the University of Wales College of Cardiff, U.K., the MSc degree in microelectronics systems design and the Ph.D. degree in computational bio-electromagnetism from Brunel University, London, U.K. His research interests include theoretical and computational bio-electromagnetism, micro-antennas and biological antennas’ design, EMC, numerical modeling techniques, EM field implantable sensors in biological bodies, interaction of EM radiation with human organs particularly brain, model the potential distributions inside the human cochlea as a result of electrical stimulation with intracochlear electrodes, grid enabled EM, and software development. In the past, Dr. Reyhani worked as an Assistant Professor at Brunel University, U.K., and taught courses at the University of Saskatchewan, Canada. He has also worked extensively in industry in areas of electronics, microelectronics and design.
December 6, 2012
Title: Educational Innovation: Surely you must be joking, Mr. Ewert!
Abstract: The National Academy of Engineering, the National Science Board, and many leading researchers have all called for significant rethinking of educating the engineer of 2020. This short presentation is to distill the major findings and have a small group discussions of how to innovate in the educational process.