1. Discover New Worlds: How newly hired engineers learn the social systems in a wor

    01:22:08

    from iFoundry Added 44 0 0

    In this iFoundry video, from the Inquiries on Education Seminar Series, Russell Korte talks about the transition from school to workplace for graduate engineers. Russell Korte is an iFoundry Fellow from Human Resource Education, University of Illinois at Urbana Champaign

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    • IEE/CEEM Seminar: Azita Emami and Energy-Efficient Chip-to-Chip Communication at the Extremes of Computing

      01:18:25

      from Institute for Energy Efficiency Added 44 0 0

      Azita Emami Professor, Department of Electrical Engineering, California Institute of Technology Energy-Efficient Chip-to-Chip Communication at the Extremes of Computing December 4, 2013 | 4:00pm | ESB 1001 Faculty hosts: Mark Rodwell & John Bowers Abstract The scalability of CMOS technology has driven computation into a diverse range of applications across the power consumption, performance and size spectra. Communication is a necessary adjunct to computation, and whether in the context of high-performance computing, mobile devices or biomedical implants, chip-to-chip communication can take up a significant portion of the overall system power budget. A single interconnect methodology cannot address such a broad range of requirements efficiently. Nevertheless, there are a number of interesting design concepts that can facilitate efficient interconnect design, no matter what the application; this talk seeks to elucidate these concepts through design examples at both ends of the power/performance spectra. In particular we present efficient transceivers for parallel optical interconnects that can take advantage of recent advances in silicon photonic devices. Novel low-power clocking techniques, which are essential for synchronous data communication, will be discussed as well. We conclude this presentation with a brief discussion of limitations of on-chip signaling, our proposed solutions and applications of proximity communication in minimally invasive biomedical implants. Biography Azita Emami received her M.S. and Ph.D. degrees in Electrical Engineering from Stanford University in 1999 and 2004 respectively. She received her B.S. degree from Sharif University of Technology in 1996. At Stanford she was a member of VLSI Research Group, where she worked on variety of projects in the areas of integrated circuits and system design. Professor Emami joined IBM T. J. Watson Research Center in 2004 as a research staff member in the Communication Technologies Department. From Fall 2006 to Summer 2007, she was an Assistant Professor of Electrical Engineering at Columbia University in the city of New York. In 2007, she joined Caltech, where she is now a Professor of Electrical Engineering. Her current research interests include mixed-signal integrated circuits and systems, high-speed on-chip and chip-chip electrical and optical interconnects, system and circuit design solutions for highly-scaled CMOS technologies, clock generation and distribution, compressive sensing, wearable and implantable devices for neural recording, stimulation, and efficient drug delivery.

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      • Best Practices for School-Based Therapy Documentation

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        from MJ Care Added 343 0 0

        Carlynn Highie, OTR/L and School Therapy Consultant discusses how therapists can inimize risks in due process hearings and Medicaid audits. Originally presented at WCASS Conference, May 2011.

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        • IEE/CEEM Seminar: Dave Auston and The Changing Energy Landscape

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          from Institute for Energy Efficiency Added 46 0 0

          David Auston Executive Director, Institute for Energy Efficiency UC Santa Barbara The Changing Energy Landscape – A Summary of Key Issues and Trends October 30, 2013 | 4:00pm | Bren Hall 1414 Faculty Host: Sangwon Suh Abstract: Drawing from numerous sources, this tutorial will summarize some of the more important recent developments in the field of energy and project current trends forward to develop some (hopefully) plausible scenarios for what might arise during the next few decades. Some key questions that will be addressed are: Is shale gas an energy bonanza, an environmental hazard, or both? Will it sideline renewables and electric vehicles? Will it displace coal? Will solar become price competitive without subsidies, and if so when? Will the cost and capacity of energy storage technology advance to a level where it can be used to stabilize the insertion of substantial renewables into the electric grid, and will it enable widespread deployment of electric vehicles? Can we realistically expect to meet energy consumption and greenhouse gas emission targets for 2030 and 2050? Obviously neither I nor anyone can provide definitive answers to these questions — the intent of this tutorial is simply to surface some of the key factors and generate a discussion that will hopefully illuminate a very complex and changing set of issues pertaining to our energy future. Biography: David Auston is Executive Director of the Institute for Energy Efficiency and Executive Director of the Center for Energy Efficient Materials, at UC Santa Barbara. Prior to joining UC Santa Barbara, he was President of the Kavli Foundation. He has been a member of the technical staff and department head at AT&T’s Bell Laboratories (now Lucent Technologies), Professor of Electrical Engineering and Applied Physics and Dean of the School of Engineering and Applied Science at Columbia University, Provost of Rice University, and President of Case Western Reserve University. Auston has contributed to research in the fields of lasers, nonlinear optics, and solid-state materials. He is a member of the National Academy of Sciences, the National Academy of Engineering, and a Fellow of the American Academy of Arts and Sciences, the Institute of Electrical and Electronic Engineers, the Optical Society of America, and the American Physical Society. A native of Toronto, Canada, Auston earned bachelors and masters degrees in engineering physics and electrical engineering from the University of Toronto and a Ph.D. in electrical engineering from the University of California, Berkeley.

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          • Nathan Stoddard IEE/CEEM Seminar - October 10, 2012 at UC Santa Barbara

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            from Institute for Energy Efficiency Added 59 0 0

            Nathan Stoddard Silicon Crystallization Scientist SolarWorld USA How to Freeze Silicon: A Many-Splendored Problem Abstract Since the first use of silicon in electronic devices, the crystallization of silicon into useful forms for device processing has been a constant subject of both fundamental research and commercial development. To make suitable substrates for ever-smaller devices, companies have perfected the Czochralski crystal growth process for sizes up to 450 mm in diameter, with ingots up to 300 kg in weight. For use in photovoltaic applications, up to six different crystallization methods have been in production at different companies at the same time. The requirements for use in solar panels covering ever larger areas of the planet are quite different. For the past decade, the most prevalent technology has been multicrystalline ingot formation, which results in ingots up to 1,000 kg in weight but with considerably lower crystal quality. Neither technique has been able to take a truly dominant position in the solar industry. What is it about silicon that makes it such an interesting material to solidify? What are the most outlandish methods used to make substrates? What happens when things go wrong? Could a new technique still break out and take over from the incumbents? Come and find out.

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            • IEE/CEEM 2012-13 Seminar Series: Peter Delfyett

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              from Institute for Energy Efficiency Added 70 1 0

              Peter Delfyett Professor, Optics, Electrical and Computer Engineering, and Physics University of Central Florida Ultrafast Coherent Optical Signal Processing using Stabilized Optical Frequency Combs from Mode-locked Semiconductor Diode Lasers December 5, 2012 | 4:00pm | ESB 1001 Abstract The development of high speed communications, interconnects and signal processing are critical for an information based economy. Lightwave technologies offer the promise of high bandwidth connectivity from component development that is manufacturable, cost effective, and electrically efficient. The concept of optical frequency/wavelength division multiplexing has revolutionized methods of optical communications, however the development of optical systems using 100’s of wavelengths present challenges for network planners. The development of compact, efficient optical sources capable of generating a multiplicity of optical frequencies/wavelength channels from a single device could potentially simplify the operation and management of high capacity optical interconnects and links. Over the years, we have been developing mode-locked semiconductor lasers to emit ultrashort optical pulses at high pulse repetition frequencies for a wide variety of applications, but geared toward optical communications using time division multiplexed optical links. The periodic nature of optical pulse generation from mode-locked semiconductor diode lasers also make these devices ideal candidates for the generation of high quality optical frequency combs, or multiple wavelengths, in addition to the temporally stable, high peak intensity optical pulses that one is accustomed to. The optical frequency combs enables a variety of optical communication and signal processing applications that can exploit the large bandwidth and speed that femtosecond pulse generation implies, however the aggregate speed and bandwidth can be achieved by spectrally channelizing the bandwidth, and utilize lower speed electronics for control of the individual spectral components of the mode-locked laser. This presentation will highlight our recent results in the generation of stabilized frequency combs, and in developing approaches for filtering, modulating and detecting individual comb components. We then show how these technologies can be applied in signal processing applications such as arbitrary waveform generation, arbitrary waveform measurement, laser radar and matched filtering for pattern recognition.

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              • IEE/CEEM 2012-2013 Seminar: Stanford Professor Jen Dionne

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                from Institute for Energy Efficiency Added 203 0 0

                Jen Dionne Professor, Department of Material Science and Engineering, Stanford University Progress and Challenges in Plasmon-enhanced Photocatalysis and Photovoltaics March 6, 2013 | 4:00pm | ESB 1001 Abstract Metallic nanoparticles support strong, localized oscillations of conduction electrons – surface plasmons – that have recently enabled significant improvements in photovoltaic and photocatalytic cell efficiencies. While considerable research has investigated the potential for somewhat larger plasmonic particles (>20 nm) to enhance solar energy conversion, most catalytic reactions rely on the high catalytic activity of very small metallic particles. In this presentation, we explore the plasmonic and catalytic properties of such small metallic nanoparticles, with the aim of using plasmons to both monitor and enhance catalytic reactions. We first investigate the plasmon resonances of individual nanoparticles as their sizes are reduced from 20 nm down to less than 2 nm. We find that plasmon resonances are influenced by quantum confinement effects for particles smaller than 5 nm. Then, we study the photocatalytic activity of individual metal nanoparticles coated with titania. Shifts of the plasmon resonance probe addition or removal of electrons during a redox reaction, providing insight into charge-separation mechanisms. Finally, we explore the potential to achieve broadband solar absorption in photocatalytic and photovoltaic systems using upconversion. Calculations indicate that upconverting materials can significantly improve cell efficiencies, and we develop the experimental techniques to realize high-efficiency upconversion by tailoring the optical density of states via plasmonics and the electronic density of states via pressure measurements. Our single-particle measurements unravel the interplay of particle structure and function, and provide a platform for enhancing future photocatalytic and photovoltaic systems.

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                • 2012-2013 IEE/CEEM Seminar Series: Bruce Logan

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                  from Institute for Energy Efficiency Added 154 0 0

                  Bruce Logan Professor, Department of Civil & Environmental Engineering, Penn State University Energy from water: Microbial fuel cell technologies meet salinity gradient energy January 30, 2013 | 4:00pm | ESB 1001 Abstract The ability of certain microorganisms to transfer electrons outside the cell has created opportunities for new types of energy generation including: microbial fuel cells (MFCs), to produce electrical power; microbial electrolysis cells (MECs), to produce fuels such as hydrogen and methane gases; microbial desalination cells (MDCs) to partially or fully desalinate water; and microbial reverse electrodialysis cells (MRCs) that can additionally be used to obtain salinity gradient energy. In an MFC, exoelectrogens oxidize organic matter and release electrons to the anode. These electrons flow to the counter electrode (cathode) where they combine with oxygen and protons to form water, generating current and power. Sustained current generation is possible using virtually any type of biodegradable organic matter. The current produced by exoelectrogenic microorganisms can also be boosted to electrochemically produce hydrogen gas at the cathode. The voltage needed (>0.2 V) is substantially smaller than that needed to electrolyze water. By including a stack of membranes into MFCs or MECs, sources of salt and fresh water can be used in the membrane stack to produce additional energy from this salinity gradients. Key findings in electromicrobiology and advances in the materials and architectures used to make these different types of bioelectrochemical and electrochemical systems will be presented.

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                  • Educating Engineers: Designing for the Future of the Field

                    01:03:53

                    from iFoundry Added 143 0 0

                    A recently published Carnegie Foundation study of engineering education describes and analyzes both typical and exemplary approaches to teaching and learning engineering at the outset of the new century. It addresses the major questions of what engineering education looks like and how it prepares practitioners by exploring what lies inside the “black box” of preparation for the engineering profession. These questions are addressed in ways that will assist educators, students, university leaders, and practicing engineers to prepare future engineers more effectively. The study also provides an important point of linkage to foster an exchange of insights and best practices among and between disciplinary fields, and both graduate and undergraduate programs. Educating Engineers: Designing for the Future of the Field is the final report from the Foundation’s study. As the Senior Scholar at the Foundation and lead author of the report, Professor Sheppard will describe the dominant model of engineering education, outline improvements to better align educational practices with the needs to today’s engineering professionals, and propose an alternate (and fairly radical) model suggested by new understanding of how people learn. Ample time will be allotted in the session for Q&A, and discussion.

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                    • 2012-2013 IEE/CEEM Seminar Series: Thomas Wenisch

                      01:02:48

                      from Institute for Energy Efficiency Added 129 0 0

                      Thomas Wenisch Professor, Department of Computer Science and Engineering University of Michigan Power Management from Smartphones to Data Centers Abstract Power has become a first-class design constraint in computing platforms from the smartphone in your pocket to warehouse-scale computers in the cloud. Historically, semiconductor innovation has repeatedly provided more transistors (Moore’s Law) for roughly constant power per chip by scaling down supply voltage each generation. Unfortunately voltage scaling has ended due to stability limits and chip power densities are increasing each generation on a trajectory that outstrips improvements in the ability to dissipate heat. To continue to extract value from Moore’s Law, we need to find system-level approaches to improve efficiency and deliver more performance within tight energy, power, and thermal constraints. In the first part of this talk, I will discuss Computational Sprinting, a technique to improve the responsiveness of smartphone platforms by transiently exceeding sustainable thermal limits—firing up numerous `dark silicon’ cores to complete a sub-second burst of computation while buffering the resulting heat in a phase change material embedded in the chip’s heat sink. Then, I will shift focus to warehouse-scale computing to discuss power management in online data intensive services. These applications, such as web search, social networking, and ad serving, must process terabytes of data in interactive time scales, making them a challenging target for power management.

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