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:20170519T214041Z UID:F3B03C01-E5B6-11E7-833E-0050568D7F66 DTSTART;TZID=Turkey:20170512T133000 DTEND;TZID=Turkey:20170512T153000 DESCRIPTION:Speaker: Prof. Vakur B. Ertürk\, Bilkent University\n\nTopic: "Incomplete-Leaf Multilevel Fast Multipole Algorithm for Multiscale Electr omagnetics Problems"\n\nLocation: Middle East Technical University\, Ankar a\, Turkey\n\nAbstract: Fast Multipole Method (FMM) is selected as one of the 10 algorithms with the greatest influence on the development and pract ice of science and engineering in the 20th century\, and its multilevel ve rsion\, Multilevel Fast Multipole Algorithm (MLFMA)\, is currently among t he most widely used and powerful methods in computational electromagnetics (CEM) in addition to its use in other fields such as chemistry\, biology\ , and physics applications. However\, when scattering from multi-scale (el ectromagnetic) applications are considered\, for instance electrically sma ll and structurally complicated antennas on large platforms\, MLFMA may be come considerably inefficient or inaccurate originating from the fact that it deploys fixed-size boxes at each and every level of the corresponding tree structure\, which is not suited when use of a multi-scale meshing (i. e.\, highly nonuniform) is inevitable.\n\nIn this talk\, we will present o ur recent work on an efficient and versatile broadband MLFMA\, which is ca pable of handling large multiscale electromagnetic problems with a wide dy namic range of mesh sizes. By invoking a novel concept of incomplete-leaf tree structures\, where only the overcrowded boxes are divided into smalle r ones for a given population threshold\, versatility of using variable-si zed boxes is achieved. Consequently\, for geometries containing highly ove rmeshed local regions\, the proposed method is always more efficient than the conventional MLFMA for the same accuracy\, while it is always more acc urate if the efficiency is comparable. Furthermore\, in such a population- based clustering scenario\, the error is controllable regardless of the nu mber of levels.\n\nBio: Vakur B. Ertürk received the B.S. degree in elect rical engineering from the Middle East Technical University\, Ankara\, Tur key\, in 1993\, and the M.S. and Ph.D. degrees from The Ohio-State Univers ity (OSU)\, Columbus\, in 1996 and 2000\, respectively. He is currently a Professor with the Electrical and Electronics Engineering Department\, Bil kent University\, Ankara. His research interests include the analysis and design of conformal antennas and arrays\, wireless sensors for structural health monitoring\, numerical techniques\, printed circuits\, scattering f rom and propagation over large terrain profiles. Dr. Ertürk served as the Secretary/Treasurer of the IEEE Turkey Section as well as the Turkey Chap ter of the IEEE Antennas and Propagation\, Microwave Theory and Techniques \, Electron Devices and Electromagnetic Compatibility Societies. He was th e recipient of the 2005 URSI Young Scientist and 2007 Turkish Academy of S ciences Distinguished Young Scientist Awards.\n\nSpeaker(s): Prof. Vakur B . Erturk\, \n\nAnkara\, Ankara\, Türkiye LOCATION:Ankara\, Ankara\, Türkiye ORGANIZER:ozergul@metu.edu.tr SEQUENCE:0 SUMMARY:[Legacy Report] IEEE AP/MTT/EMC/ED TURKEY CHAPTER SEMINAR SERIES -- SEMINAR 11 URL;VALUE=URI:https://events.vtools.ieee.org/m/148810 X-ALT-DESC:Description: <br /><p>Speaker: Prof.&nbsp\;Vakur B. Ert&uuml\;rk \, Bilkent University</p>\n<p>Topic: "Incomplete-Leaf Multilevel Fast Mult ipole Algorithm for Multiscale Electromagnetics Problems"</p>\n<p>Location : Middle East Technical University\, Ankara\, Turkey</p>\n<p><em>Abstract: &nbsp\;Fast Multipole Method (FMM) is selected as one of the 10 algorithms with the greatest influence on the development and practice of science an d engineering in the 20th century\, and its multilevel version\, Multileve l Fast Multipole Algorithm (MLFMA)\, is currently among the most widely us ed and powerful methods in computational electromagnetics (CEM) in additio n to its use in other fields such as chemistry\, biology\, and physics app lications. However\, when scattering from multi-scale (electromagnetic) ap plications are considered\, for instance electrically small and structural ly complicated antennas on large platforms\, MLFMA may become considerably inefficient or inaccurate originating from the fact that it deploys fixed -size boxes at each and every level of the corresponding tree structure\, which is not suited when use of a multi-scale meshing (i.e.\, highly nonun iform) is inevitable. &nbsp\;</em></p>\n<p><em>In this talk\, we will pres ent our recent work on an efficient and versatile broadband MLFMA\, which is capable of handling large multiscale electromagnetic problems with a wi de dynamic range of mesh sizes. By invoking a novel concept of incomplete- leaf tree structures\, where only the overcrowded boxes are divided into s maller ones for a given population threshold\, versatility of using variab le-sized boxes is achieved. Consequently\, for geometries containing highl y overmeshed local regions\, the proposed method is always more efficient than the conventional MLFMA for the same accuracy\, while it is always mor e accurate if the efficiency is comparable. Furthermore\, in such a popula tion-based clustering scenario\, the error is controllable regardless of t he number of levels.</em></p>\n<p><em>Bio:&nbsp\;Vakur B. Ert&uuml\;rk rec eived the B.S. degree in electrical engineering from the Middle East Techn ical University\, Ankara\, Turkey\, in 1993\, and the M.S. and Ph.D. degre es from The Ohio-State University (OSU)\, Columbus\, in 1996 and 2000\, re spectively. He is currently a Professor with the Electrical and Electronic s Engineering Department\, Bilkent University\, Ankara. His research inter ests include the analysis and design of conformal antennas and arrays\, wi reless sensors for structural health monitoring\, numerical techniques\, p rinted circuits\, scattering from and propagation over large terrain profi les. Dr. Ert&uuml\;rk served as the Secretary/Treasurer of the IEEE Turkey Section as well as the Turkey Chapter of the IEEE Antennas and Propagatio n\, Microwave Theory and Techniques\, Electron Devices and Electromagnetic Compatibility Societies. He was the recipient of the 2005 URSI Young Scie ntist and 2007 Turkish Academy of Sciences Distinguished Young Scientist A wards.</em></p> END:VEVENT END:VCALENDAR