Seminar Prof. Jena, Thursday 5/10 1:30pm, Morgan 121
Dear All, I encourage you to attend the seminar below. Thanks for your time. Best regards, Ali Ali Shakouri Mary Jo and Robert L. Kirk Director Professor of Electrical and Computer Engineering Birck Nanotechnology Center, Room 1027 Purdue University 1205 West State Street West Lafayette, IN 47907-2057 (765) 496-6105; Fax: (765) 496-8299 shakouri@purdue.edu *************************************** Materials and physics for future high-speed RF and power devices and circuits: challenges and opportunities Professor Debdeep Jena, University of Notre Dame Thursday May 10th, 1:30-2:30pm Morgan 121 Abstract: As the age of scaling of Silicon transistors hits quantum mechanical brick walls, there is another age of electronics that is dawning. The new age is of ubiquitous high-performance RF and power electronics, where the key metric is energy efficiency. This new age of electronic devices and circuits pose significant challenges in developing new materials, investigating new physics, and innovations in circuits and systems. Therein also lies the opportunity for material scientists, electrical engineers, and physicists. In this presentation, I will highlight our research efforts in materials and devices that address this challenge. In particular, we have investigated wide bandgap semiconductor epitaxy and polarization physics originating from broken symmetry that enables functionalities absent in traditional semiconductors. The new physics and material properties drive the RF and power performance of such semiconductors to levels unmatched by traditional semiconductors. Emerging materials such as 2D crystals enhance these functionalities, and allow facile integration. The performance levels of such devices require radical rethinking of device physics, thermal management, and circuit and system architectures. Thus they offer significant opportunities for novel design. What is rather surprising is that the fundamental quantum limits of RF and power devices are poorly understood today, offering significant opportunities for physicists. In the talk, I wish to convey my personal excitement and vision about the future of this truly interdisciplinary endeavor. Bio: Debdeep Jena received the B. Tech. degree with a major in Electrical Engineering and a minor in Physics from the Indian Institute of Technology (IIT) Kanpur in 1998, and the Ph.D. degree in Electrical and Computer Engineering at the University of California, Santa Barbara (UCSB) in 2003. He joined the faculty of the department of Electrical Engineering at the University of Notre Dame in 2003. His research and teaching interests are in the MBE growth and device applications of quantum semiconductor heterostructures (currently III-V nitride semiconductors for RF and power applications), charge transport in nanostructured semiconducting materials such as graphene, nanowires and nanocrystals, and their device applications, and in the theory of charge, heat, and spin transport in nanomaterials. He is the author on several journal publications, including articles in Science, Physical Review Letters, and Electron Device Letters among others. He has received two best student paper awards in 2000 and 2002 for his Ph.D. dissertation research, the NSF CAREER award in 2007, and the Joyce award for excellence in undergraduate teaching in 2010. ***************************************
Dear All, I encourage you to attend the seminar below by Prof. Bouman from ECE. I think there are interesting opportunities to push the boundaries of nano-characterization using the broad framework of model based imaging. We are fortunate to have one of the leading experts at Purdue. I hope this can be the basis of new collaborations with BNC researchers. Thanks for your time. Best regards, Ali Ali Shakouri Mary Jo and Robert L. Kirk Director Professor of Electrical and Computer Engineering Birck Nanotechnology Center, Room 1027 Purdue University 1205 West State Street West Lafayette, IN 47907-2057 (765) 496-6105; Fax: (765) 496-8299 shakouri@purdue.edu<mailto:shakouri@purdue.edu> ******************************** Birck/ECE Seminar Model Based Imaging Charlie Bouman Michael J. and Katherine R. Birck Professor of ECE Purdue University May 23rd, 2012 @ 11:00am Birck 2001 Abstract: Over the last two decades, model-based imaging techniques have emerged as a principled framework for understanding and solving many of the most important problems in imaging research. The approach of model-based imaging is to construct a model of both the image and the imaging system, and then to use this integrated model to either reconstruct an unknown image, or to estimate unknown parameters. The power of model-based methods is that they provide an optimal framework for solving a wide-range of imaging problems. So for example, model-based image reconstruction and parameter estimation can be used to robustly form images from sensors with uncertain calibration. But in addition, model-based imaging can serve as a framework for optimizing the static and dynamic design of imaging sensor systems themselves. In this talk, we review some techniques and recent successes in model-based imaging. Two application domains that we consider are tomographic reconstruction from multislice helical-scan CT and electron microscopy, two very different sensors that share much in common when viewed from the perspective of model-based imaging. For both cases, we discuss a variety of technical innovations, which either improve image quality or reduce the computational burden. We then show results, which demonstrate the value of the methods both quantitatively and qualitatively, on a variety of real and simulated datasets. Finally, we conclude with a philosophical discussion of the future potential of model-based methods, and we present some emerging ideas in prior modeling of images, which have potential to substantially improve upon current results. Bio: Charles A. Bouman is the Michael J. and Katherine R. Birck Professor of Electrical and Computer Engineering at Purdue University where he also holds a courtesy appointment in the School of Biomedical Engineering and serves has a co-director of Purdue's Magnetic Resonance Imaging Facility. He received his B.S.E.E. degree from the University of Pennsylvania, M.S. degree from the University of California at Berkeley, and Ph.D. from Princeton University in 1989. Professor Bouman's research focuses on inverse problems, stochastic modeling, and their application in a wide variety of imaging problems including tomographic reconstruction and image processing and rendering. Prof. Bouman is a Fellow of the IEEE, AIMBE, IS&T, and SPIE. He has served as the Editor-in-Chief of the IEEE Transactions on Image Processing, Distinguished Lecturer for the IEEE Signal Processing Society, a member of the IEEE Signal Processing Society's Board of Governors, and the Vice President of Publications for the IS&T Society. Currently, he is Vice President Elect for Technical Directions of the IEEE Signal Processing Society. ********************************
participants (1)
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Shakouri, Ali