BEGIN:VCALENDAR VERSION:2.0 PRODID:IEEE vTools.Events//EN CALSCALE:GREGORIAN BEGIN:VTIMEZONE TZID:Turkey BEGIN:DAYLIGHT DTSTART:20380119T061407 TZOFFSETFROM:+0300 TZOFFSETTO:+0300 RRULE:FREQ=YEARLY;BYDAY=3TU;BYMONTH=1 TZNAME:+03 END:DAYLIGHT BEGIN:STANDARD DTSTART:20160907T000000 TZOFFSETFROM:+0300 TZOFFSETTO:+0300 RRULE:FREQ=YEARLY;BYDAY=1WE;BYMONTH=9 TZNAME:+03 END:STANDARD END:VTIMEZONE BEGIN:VEVENT DTSTAMP:20180503T000000Z UID:70AA232C-76CC-4A1A-A878-215921227738 DTSTART;TZID=Turkey:20180216T133000 DTEND;TZID=Turkey:20180216T153000 DESCRIPTION:Speaker: Assoc. Prof. Hakan Bağcı\, KAUST\n\nTopic: "Time Mar ching Schemes for Solving Integral Equations of Electromagnetics"\n\nLocat ion: Middle East Technical University\, Ankara\, Turkey\n\nAbstract: Elect romagnetic devices and systems are at the heart of technological advances driving and changing many areas of science and engineering including effic ient energy management\, biomedical electronics\, communications and compu ting\, and even environmental monitoring and civil design. The common deno minator of these systems is that they are electrically large\, have a wide dynamic range of frequency of operation\, their device components are geo metrically intricate with dimensions varying by orders of magnitude\, and finally their designs require many repetitions of characterizations with d ifferent parameters.\n\nThe research field of computational electromagneti cs enables accurate\, efficient\, and robust numerical modeling and charac terization of such systems. This is a challenging task because the common characteristics listed above translate into large matrix systems with mill ions (if not billions) of unknowns to be solved for\, multi-scale discreti zations\, and ill-conditioned equations followed by prohibitively long exe cutions times.\n\nThis presentation will focus on stable\, efficient\, and accurate time marching schemes developed to address some of these challen ges. More specifically\, I will describe (i) an explicit marching-on-in-ti me (MOT) scheme for solving time domain integral equations (TDIEs)\, which avoids inversion of dense matrices for increased efficiency and (ii) an M OT-TDIE solver for simulating electromagnetic interactions on high-contras t scatterers\, which makes use of a carefully designed extrapolation schem e for increased stability. Numerical experiments\, which demonstrate accur acy\, efficiency\, and applicability of these methods\, will also be prese nted.\n\nBio: Hakan Bagci received the B.S. degree in Electrical and Elect ronics Engineering from the Bilkent University\, Ankara\, Turkey\, in 2001 \; and the M.S. and Ph.D. degrees in Electrical and Computer Engineering f rom the University of Illinois at Urbana- Champaign (UIUC)\, Urbana\, IL\, USA\, in 2003 and 2007\, respectively.\n\nFrom June 1999 to July 2001\, h e worked as an Undergraduate Researcher with the Computational Electromagn etics Group\, Bilkent University. From August 2001 to December 2006\, he w as a Research Assistant with the Center for Computational Electromagnetics and Electromagnetics Laboratory\, UIUC. From January 2007 to August 2009\ , he was a Research Fellow with the Radiation Laboratory\, University of M ichigan\, Ann Arbor\, MI\, USA. Since August 2009\, he has been with the K ing Abdullah University of Science and Technology (KAUST)\, Thuwal\, Saudi Arabia\, where he is currently an Associate Professor of Electrical Engin eering.\n\nHis research interests include various aspects of theoretical a nd applied computational electromagnetics with emphasis on well-conditione d frequency and time domain integral equation formulations and their discr etization\, hybrid time domain integral and differential equation solvers\ , accurate\, stable\, and efficient marching schemes for time domain solve rs\, stochastic characterization of electromagnetic field and wave interac tions on complex geometries\, and solution of two and three dimensional el ectromagnetic inverse scattering problem using signal processing technique s. He authored or co-authored 85 journal papers and 180 papers in conferen ce proceedings.\n\nSpeaker(s): Prof. Hakan Bagci\, \n\nMiddle East Technic al University\, Ankara\, Ankara\, Türkiye\, 06800 LOCATION:Middle East Technical University\, Ankara\, Ankara\, Türkiye\, 06 800 ORGANIZER:ozergul@metu.edu.tr SEQUENCE:2 SUMMARY:IEEE AP/MTT/EMC/ED TURKEY CHAPTER SEMINAR SERIES -- SEMINAR 23 URL;VALUE=URI:https://events.vtools.ieee.org/m/162914 X-ALT-DESC:Description: <br /><p>Speaker: Assoc. Prof. Hakan Bağcı\, KAUS T</p>\n<p>Topic: "Time Marching Schemes for Solving Integral Equations of Electromagnetics"</p>\n<p>Location:&nbsp\;Middle East Technical University \, Ankara\, Turkey</p>\n<p>Abstract:&nbsp\; Electromagnetic devices and sy stems are at the heart of technological advances driving and changing many areas of science and engineering including efficient energy management\, biomedical electronics\, communications and computing\, and even environme ntal monitoring and civil design. The common denominator of these systems is that they are electrically large\, have a wide dynamic range of frequen cy of operation\, their device components are geometrically intricate with dimensions varying by orders of magnitude\, and finally their designs req uire many repetitions of characterizations with different parameters.</p>\ n<p>The research field of computational electromagnetics enables accurate\ , efficient\, and robust numerical modeling and characterization of such s ystems. This is a challenging task because the common characteristics list ed above translate into large matrix systems with millions (if not billion s) of unknowns to be solved for\, multi-scale discretizations\, and ill-co nditioned equations followed by prohibitively long executions times.</p>\n <p>This presentation will focus on stable\, efficient\, and accurate time marching schemes developed to address some of these challenges. More speci fically\, I will describe (i) an explicit marching-on-in-time (MOT) scheme for solving time domain integral equations (TDIEs)\, which avoids inversi on of dense matrices for increased efficiency and (ii) an MOT-TDIE solver for simulating electromagnetic interactions on high-contrast scatterers\, which makes use of a carefully designed extrapolation scheme for increased stability. Numerical experiments\, which demonstrate accuracy\, efficienc y\, and applicability of these methods\, will also be presented.</p>\n<p>B io:&nbsp\; Hakan Bagci received the B.S. degree in Electrical and Electron ics Engineering from the Bilkent University\, Ankara\, Turkey\, in 2001\; and the M.S. and Ph.D. degrees in Electrical and Computer Engineering from the University of Illinois at Urbana- Champaign (UIUC)\, Urbana\, IL\, US A\, in 2003 and 2007\, respectively.</p>\n<p>From June 1999 to July 2001\, he worked as an Undergraduate Researcher with the Computational Electroma gnetics Group\, Bilkent University. From August 2001 to December 2006\, he was a Research Assistant with the Center for Computational Electromagneti cs and Electromagnetics Laboratory\, UIUC. From January 2007 to August 200 9\, he was a Research Fellow with the Radiation Laboratory\, University of Michigan\, Ann Arbor\, MI\, USA. Since August 2009\, he has been with the King Abdullah University of Science and Technology (KAUST)\, Thuwal\, Sau di Arabia\, where he is currently an Associate Professor of Electrical Eng ineering.</p>\n<p>His research interests include various aspects of theore tical and applied computational electromagnetics with emphasis on well-con ditioned frequency and time domain integral equation formulations and thei r discretization\, hybrid time domain integral and differential equation s olvers\, accurate\, stable\, and efficient marching schemes for time domai n solvers\, stochastic characterization of electromagnetic field and wave interactions on complex geometries\, and solution of two and three dimensi onal electromagnetic inverse scattering problem using signal processing te chniques. He authored or co-authored 85 journal papers and 180 papers in c onference proceedings.</p> END:VEVENT END:VCALENDAR