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Watt's Up
College of Optical Sciences News for September 17, 2009
Watt's Happening | Employment | Subscribe | OSC Store Complete an MS or Professional Certificate Entirely On-Line
Today's Colloquium September 17. 3:30 p.m. Meinel 307
Bahram Jalali, University of California Los Angeles, will present Real-Time Measurements, Rogue Events and Photon Economics. Nasser Peyghambarian is the host.
Abstract: Rogue events otherwise known as Outliers or Black Swans are singular and rare events that have dramatic impact. They appear in seemingly unconnected systems in the form of oceanic rogue waves, stock market crashes, gene mutations, and as spontaneous errors in communication systems. Attempts to understand the underlying dynamics of complex systems that lead to such spectacular and often cataclysmic outcome have been frustrated by insufficient statistical data due to scarcity of such events, and also by our inability to perform experiments under controlled conditions. In this talk we show that nonlinear optical systems also harbor extreme events and provide a test bench for unveiling their mystery and for developing models that can help us characterize risk and volatility associated with rogue events. The key to realizing this vision is real-time ultrafast measurements that can capture singular and randomly occurring events. Fortuitously, the Photonic Time Stretch technology is providing a powerful and nearly-ideal tool box for reaching this difficult yet high payoff goal. We show two examples in nonlinear optics where the ability to capture extreme events has led to understanding their underlying dynamics which in turn has made it possible to control them and to harness their potential.
Bio: Bahram Jalali joined the Electrical Engineering Department at UCLA in 1993 after 4 years at AT&T Bell Laboratories. He is a Fellow of IEEE and of the Optical Society of America and recipient of the R.W. Wood Prize from Optical Society of America for the invention and demonstration of the Silicon Raman Laser. In 2005 he was elected into the Scientific American Top 50, and received the BrideGate 20 Award in 2001 for his entrepreneurial accomplishments. He served as a consultant to Intel Corporation from 2001-2003. Dr. Jalali serves on the Board of Trustees of the California Science Center. He has published over 350 journal and conference papers and 7 patents. He lives in Brentwood with his wife and 3 children and is an avid sailor.
Colloquium -- the Movie
Videos of our Colloquia are available at http://www.optics.arizona.edu/Colloquium/default.htm
Friday's OSC Community Speakers. September 18. Noon. Meinel 410.
This week features presentations by Leonardo G. Montilla and Ragnar Olafsson.
Leo will present Real-Time Pulse Echo and Photoacoustic Imaging Using an Ultrasound Array and Inline Reflective Illumination.
Abstract: Photoacoustic imaging requires pulsed light to be absorbed by the area of interest and the induced acoustic waves detected by a distant ultrasound transducer. Difficulty exists in illuminating thick samples for photoacoustic imaging because light has to be directed around the transducer. We present a method of efficiently delivering light around a linear array transducer. The method exploits a prism to transmit light while reflecting the acoustic waves. The measured pulse echo spatial dimensions (-6dB) of 0.5 mm graphite rods submerged in water with the device was .40 mm x .45 mm (axial x lateral). As this is close to the nominal spatial dimensions of .35 mm x .45 mm, the introduction of the prism did not degrade the image quality significantly. A system with these capabilities may not only facilitate small animal photoacoustic imaging, but it may also promote transition of this modality into clinical practice.
Ragnar will present Ultrasound Current Source Density Imaging of a Time-Varying Current Field in a Multielectrode Nerve Chamber.
Abstract: Interventional neurosurgery requires precise mapping of cortical activity prior to resection to minimize the loss of function. This laborious and time consuming mapping procedure is performed with surface and penetrating electrodes. Ultrasound Current Source Density Imaging (UCSDI) is a new imaging technique, developed at the Experimental Ultrasound and Neural Engineering Laboratory (EUNIL) that can potentially improve this procedure. UCSDI maps electrical current distributions based on the acoustoelectric (AE) effect, an interaction between ultrasound and electricity. The potential advantages of UCSDI are high spatial resolution defined by the ultrasonic point spread function, automatic registration to B-mode ultrasound, and fast mapping with electronically steered beams. This talk will describe UCSDI and recent efforts at EUNIL to use it to map bioelectric activity of peripheral nerves.
Undergraduates, the Community Speaker Series is not only for graduate students. So please join us! As always, the Community Speaker Series starts at noon in room 408/410, Meinel building. Hope to see you all there.
Next Week's Colloquium September 24. 3:30 p.m. Meinel 307
Charles Falco, University of Arizona College of Optical Sciences, will present Computerized Image Analysis: Examples and Insights From 1000 Years of Optical Projections. Mahmoud Fallahi is the host.
Abstract: The hands and mind of an artist are intimately involved in the creative process of image formation, intrinsically making paintings complex to analyze. In spite of this difficulty, several years ago the artist David Hockney and I identified optical evidence within a number of paintings that demonstrated artists began using optical projections as early as c1425 — over 150 years before Galileo — as aids for producing portions of their images. Looking for even earlier evidence led us to the 11th century scholar Ibn al-Haytham (Latinized as Alhazen or Alhacen), who wrote nearly one hundred works on topics as diverse as poetry and politics. Today al-Haytham is primarily known for "Alhazen's problem," his treatment of a particular geometry of reflection from flat and curved surfaces. However, as I will discuss, with his landmark seven-volume Kitāb al-Manāzir [Book of Optics], published 1028~1038, al-Haytham made intellectual contributions that subsequently were incorporated throughout the core of post-Medieval Western culture. In the course of this work, Hockney and I developed insights that I have been applying to a new approach to computerized image analysis. One direct result was to identify from Impressionist paintings by Monet, Pissarro, Renoir and others the precise locations the artists stood when making a number of their paintings. Indirect results have been the development of a high resolution infrared camera, and a project to produce filters for a multispectral camera presently scheduled to begin capturing images from Jupiter's moon Europa in 2026. Acknowledgments: I am grateful to David Hockney for the many invaluable insights into imaging gained from him in our collaboration, and to the support of ARO and DARPA.
Rolyn Optics Outstanding Graduate Teaching Assistant Awards
Thank You
Thank you, Academic Programs, for the wonderful ice cream social. It was absolutely the perfect way to begin a new semester. Click on the thumbnails for larger images.
Change is Good
From Kina Adams. On Monday, September 28, UAccess Time & Labor reporting goes live. Are you ready? If not, please take a few minutes to complete the online training tutorial at Launch UAccess Employee Online Tutorials. If you feel like you need more information than the online tutorial has given you, you can register for a live workshop at http://www3.uits.arizona.edu/workshops/current_workshops.
OSC's 8th Floor Closes for Prelims
From Academic Programs Office: On Tuesday and Wednesday, September 22 and 23, from 8:00 am to Noon, the Doctoral Written Comprehensive Exam will be administered in the 8th floor break-out area and conference room. Please refrain from entering this area and interrupting the 24 PhD students taking the written comprehensive exam. You will be free to access this area beginning at Noon. We apologize for any inconvenience and thank you for your cooperation!
Happy Birthday and Best Wishes for a Wonderful Year
September 21 Rolf Binder (binder@optics.arizona.edu)
September 22 Donald Uhlmann (uhlmann@aml.arizona.edu)
September 23 David Aziz (davidaziz@gmail.com) Samir Cherian (samir_cherian@hotmail.com)
September 24 Marouan Boukli-Hacene (marmar@email.arizona.edu) Raymond Hawkins (rhawkins@arizona.edu) José Sasián (jose.sasian@optics.arizona.edu) Nicholas Trail (ntrail@optics.arizona.edu)
September 25 Eric Herman (eherman@edmundoptics.com) Aytekin Ozdemir (aozdemir@optics.arizona.edu) Brian Primeau (bprimeau@optics.arizona.edu)
September 26 Ruth Smith (rsmith@optics.arizona.edu)
September 27 Joshua Hendrickson (jhendrickson@optics.arizona.edu)
OSC Calendar
September 17 OSC Colloquium
September 18 WIO Brown Bag Lunch with Dr. Kelly Simmons-Potter
September 18
September 18 Sports Friday. Watch your e-mail for details.
September 21 WIO Brown Bag Lunch with Dr. Janet Fender
September 22 Prelims. Eighth floor is closed until noon.
September 23 Prelims. Eighth floor is closed until noon.
On Campus
September 17 AME Seminar. 4:00 p.m. AME Lecture Hall, Room S212. Dr. H.J.S. Fernaldo, Arizona State University Department of Mechanical and Aerospace Engineering Center for Environmental Fluid Dynamics, will present World of Trouble: Voyaging Through Stressed Ecosystems.
September 18 Physics Colloquium. PAS 224. At 2:15 a graduate student presentation will be announced. At 3:00 p.m. Professor Bruce R. Barrett will present Recent Advances and Challenges in Nuclear Structure Physics.
September 21 BME Seminar. 2:00 p.m. Keating 103. Yitshak Zohar, Professor, Department Aerospace and Mechanical Engineering, Bio5 Institute and the Arizona Cancer Center, University of Arizona, will present Attachment and Detachment of Circulating Tumor Cells in Microfluidic Devices.
Interns. Edmund Optics. Edmund will be interviewing Interns at our Tucson Design Center. To learn more, please contact David Henz at (520) 574-2572 ext 6310. Interviews will take place on October 1 in Meinel 447. A sign-up sheet is available in the Academic Programs office.
Laser Engineer. Directed Energy Solutions. Location: Colorado Springs, Colorado. http://www.denergysolutions.com/ We are looking for a Laser Engineer to lead a COIL (chemical oxygen iodine laser) demonstration using our new oxygen-iodine generator. For more information or to apply, please contact: Dr Matthew Bohn, Director of Laser Systems. Phone: (719) 593-7848 x4131. mattb@neumannsystemsgroup.com Open positions are listed at: http://www.denergysolutions.com/Employment/OpenPositions.aspx
Opto-Mechanical Design Engineer. Space Optics Research Labs. Space Optics Research Labs (SORL) is seeking an Opto-Mechanical Design Engineer to become an integral member of a small engineering department in a fast paced R&D environment. While focusing on optical and mechanical design challenges associated with development of precision optical components and assemblies, the engineering department is a key technical resource for manufacturing, metrology, quality assurance, field service and sales. Responsibilities also include development and design of mechanical elements from the component level to system packaging throughout their lifecycle - prototyping to transfer of products to manufacturing, 3D CAD modeling of components, assemblies and systems, perform mechanical and/or thermal FEA to characterize design performance as necessary, control documentation and configuration in accordance with established industry standards. Minimum BSME, Mechanical Engineering, plus 2 years experience in mechanical design of precision components, mechanisms and assemblies, Precision assembly and measurement experience, Proficiency with SolidWorks (ALGOR FEA package a plus) to include solid modeling, generation of 2D machine-shop drawings and Workgroup PDM. Please send resumes to: HR@sorl.com
Students: When you graduate and leave OSC, your subscription to Watt's Up automatically expires. If you would like to continue your subscription, you may add (and later remove if you wish) your name to our Watt's Up listserv by visiting http://www.optics.arizona.edu/helpdesk/listserv.htm
Cathy Alexander Information Specialist Coordinator College of Optical Sciences, University of Arizona |
