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Events for May 06, 2009
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Seminar: Robust Heterogeneous Systems in Emerging Technologies: A TFT-CMOS 3D System for Testable/Re
Wed, May 06, 2009 @ 10:30 AM - 11:30 AM
Ming Hsieh Department of Electrical and Computer Engineering
Conferences, Lectures, & Seminars
Jing Li
PhD Candidate, Purdue UniversityAbstract:
Moore's law has provided a metronome for semiconductor technology over the past four decades. However, when CMOS feature size and interconnect dimensions approach the fundamental limit, aggressive scaling no longer plays an exclusive role in improving performance. An emphasis on emerging technologies and computational paradigms has been placed. To meet the fast growing demand for system functionality, heterogeneous system that utilizes and optimizes the best of different technologies is becoming one of the most promising solutions for future complex system design. In heterogeneous system, Si CMOS will continue to play a major role for high performance computation while the other technologies can add special functions that are either difficult, expensive, or even not achievable with standard silicon CMOS. However, designing such ultra-complex systems with various technologies also poses a set of new challenges (in terms of design, test, fabrication and integration). Those challenges will ultimately lead to a paradigm shift from traditional system design (assembling separate functional blocks) to a completely new paradigm (designing them in a holistic way). In the new paradigm, device engineering and system design should not be considered separately. On the contrary, an optimal system design should consider the strong interaction between technology/device and circuit/system. To demonstrate the feasibility of the proposed system design concept, in this talk, I will focus on one interesting technology - flexible electronics (Thin Film Transistors). This technology has been widely used in LCD applications due to its low cost and manufacturability on flexible substrates (polymer, flexible glass, etc.). However, further application of TFT is limited by its performance, reliability, and inherent material induced process variations (i.e., grain boundary). To cope with these challenges, both modeling and design techniques have been developed. In particular, I will discuss device optimization, statistical simulation methodology for estimation of process variations, followed by an efficient circuit-level variability compensation technique. Optimized LTPS TFTs with higher current drivability and less variability would make them as an effective add-on (as auxiliary functions) to Si CMOS, opening up a plethora of new and interesting applications. At architecture level, I will focus on one such application â€" low-cost and robust Si-TFT heterogeneous system design with on-line/off-line built-in-test circuits, implemented in LTPS-TFTs, to test the underlying silicon CMOS die. Such a system significantly reduces the test cost and improves the controllability and observability of the underlying Si CMOS die for ensuring highly reliable and testable operations. Bio:
Jing (Vicky) Li is a PH.D. candidate from the Electrical and Computer Engineering department at Purdue University, West Lafayette, IN. She received the B.S. degree from Electrical Engineering at Shanghai Jiao Tong University, Shanghai, China, in 2004. In 2008 summer, she worked as a research intern at IBM Semiconductor Research and Development Center (SRDC), Fishkill, NY. She has received the IBM PH.D. fellowship award in 2008, the Dean's and Semester Honors for outstanding scholastics performance (Graduate School Fellowship) from Purdue University in 2007, the Meissner Fellowship from Purdue University in 2004 and Geare scholarship from Purdue and Shanghai Jiao Tong University in her undergraduate senior year (2003). She was also the recipient of the 2005~2006 Magoon's award for excellence in teaching from Purdue University. Her primary research focus encompasses the development of innovative techniques for green heterogeneous systems using emerging technologies (flexible electronics, spintronics, etc.) integrated with Si CMOS. This research has a strong emphasis on interdisciplinary field between device physics, material science and VLSI circuit/system design, bridging the technical gap between fundamental devices physics and high-level system design/optimization.Location: Hughes Aircraft Electrical Engineering Center (EEB) - -248
Audiences: Everyone Is Invited
Contact: Estela Lopez
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Fundamentals of Geotechnical & Geoenvironmental Data Management
Wed, May 06, 2009 @ 02:00 PM - 03:00 PM
Sonny Astani Department of Civil and Environmental Engineering
Conferences, Lectures, & Seminars
Peaker: Salvatore Caronna, B.S., M.S., P.E.; President and Founder of gINT Software, Santa Rosa, CAAbstract:The primary purpose of data collection, querying, and analysis is to enable the engineer to make sound decisions. All too often data management is an ad-hoc process with little or no coordination between parties generating and consuming the data. Further, data tend to be compartmentalized with manual or quasi-automated methods of sharing the information. Inappropriate tools are often used to manage and manipulate the information, resulting in flawed design and implementation.
This presentation discusses the ramifications of flawed design and illustrates appropriate methods in dealing with project data.Audiences: Everyone Is Invited
Contact: Evangeline Reyes
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Image Reconstruction and Aberration Sensing by Phase Retrieval
Wed, May 06, 2009 @ 03:30 PM - 04:30 PM
Ming Hsieh Department of Electrical and Computer Engineering
Conferences, Lectures, & Seminars
James R. Fienup, Ph.D.,
Robert E. Hopkins Professor of Optics,
Professor of Electrical and Computer Engineering
University of RochesterAbstract: Phase retrieval has been under development for image reconstruction and wavefront sensing. Application areas include astronomy, space-object imaging with both active-coherent and passive-incoherent illumination, wave-front and telescope-misalignment sensing (e.g. Hubble and James Webb space telescopes), and 3-D coherent imaging. This talk will review some of the highlights of phase retrieval development and some recent advances in phase retrieval approaches and algorithms that have occurred in the last few years.Biography: James R. Fienup received an A.B. in physics and mathematics from Holy Cross College (Worcester, MA), and M.S. and Ph.D. (1975) degrees in Applied Physics from Stanford University, where he was a National Science Foundation Graduate Fellow. He performed research for 27 years at the Environmental Research Institute of Michigan and Veridian Systems, where he was a Senior Scientist. He joined the faculty at the University of Rochester in 2002 as the Robert E. Hopkins Professor of Optics. He also holds positions as Professor, Center for Visual Science, Professor of Electrical and Computer Engineering, and Senior Scientist, Laboratory for Laser Energetics. Professor Fienup is a Fellow of the Optical Society of America (OSA) and of the International Society for Optical Engineering (SPIE), and is a Senior Member of IEEE. He was awarded the Rudolf Kingslake Medal and Prize for 1979 by the SPIE and the International Prize in Optics for 1983 by the International Commission for Optics. He was Editor-in-Chief of the Journal of the Optical Society of America A, 1997-2003. He previously served as Division Editor of Applied Optics - Information Processing, Associate Editor of Optics Letters, and Chair of the OSA Publications Council of the OSA.Professor Fienup's research interests center around imaging science. His work includes unconventional imaging, phase retrieval, wavefront sensing, and image reconstruction and restoration. These techniques are applied to passive and active optical imaging systems, synthetic-aperture radar, and biomedical imaging modalities. His past work has also included diffractive optics and image quality assessment. He has over 180 publications and 4 patents.Host: B. Keith Jenkins, jenkins@sipi.usc.eduLocation: Hughes Aircraft Electrical Engineering Center (EEB) - 248
Audiences: Everyone Is Invited
Contact: Talyia Veal
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The role of thermal undulations in adhesion of a biological membrane
Wed, May 06, 2009 @ 03:30 PM - 04:30 PM
Aerospace and Mechanical Engineering
Conferences, Lectures, & Seminars
L. B. FreundDivisions of Engineering, Brown University,Providence, RI 02912Fibroblasts and other tissue secreting cells have the ability to adhere to extracellular matrix and to migrate in the course of tissue generation. Adhesion occurs through specific bonding of integrins, large transmembrane protein molecules in the cell wall, to ligands in the surrounding tissue. Integrins are mobile in the cell wall and diffuse randomly in a normal thermal environment. The mean density of integrins in the cell wall is normally too low for adhesion to occur casually upon contact. Instead, adhesions form gradually as a few integrins become immobilized in a small region. Such focal adhesion regions usually grow to about a micron or two in diameter.
Such adhesion patches have been studied at a coarse scale by means of a number of experimental approaches. In a departure from this trend, Arnold et al. [ChemPhysChem 5 (2004) 383] carried out experiments in which they were able to study the process of cell adhesion at the scale of individual binding sites. Among their observations was the discovery that there appeared to be an upper bound on spacing of integrin bond sites for tight adhesions to form. Furthermore, the critical value of this density was found to be essentially uniform among the four cell types examined. This raises the tantalizing question as to whether or not this remarkable finding can be understood in terms of a fundamental physical phenomenon across the cell types. In this presentation, the question will be examined from the point of view of classical statistical mechanics with bonding being represented by a well in the potential energy landscape of the system. It will be shown that thermal fluctuations arising from immersion of the membrane in a heat bath can account for the appearance of a critical bond site spacing.
Location: Seaver Science Library (SSL) - Rm 150
Audiences: Everyone Is Invited
Contact: April Mundy
