BEGIN:VCALENDAR VERSION:2.0 X-WR-CALNAME:EventsCalendar PRODID:-//hacksw/handcal//NONSGML v1.0//EN CALSCALE:GREGORIAN BEGIN:VTIMEZONE TZID:America/New_York LAST-MODIFIED:20240422T053451Z TZURL:https://www.tzurl.org/zoneinfo-outlook/America/New_York X-LIC-LOCATION:America/New_York BEGIN:DAYLIGHT TZNAME:EDT TZOFFSETFROM:-0500 TZOFFSETTO:-0400 DTSTART:19700308T020000 RRULE:FREQ=YEARLY;BYMONTH=3;BYDAY=2SU END:DAYLIGHT BEGIN:STANDARD TZNAME:EST TZOFFSETFROM:-0400 TZOFFSETTO:-0500 DTSTART:19701101T020000 RRULE:FREQ=YEARLY;BYMONTH=11;BYDAY=1SU END:STANDARD END:VTIMEZONE BEGIN:VEVENT CATEGORIES:College of Engineering,Thesis/Dissertations DESCRIPTION:Topic: Spectral Projection Model for Electromagnetic Scattering from Conducting Objects Abstract: Electromagnetic analysis for many years has depended on both analytical and numerical methods. Analytical methods could provide accurate solutions, but they could only be used for basic s hapes like circular cylinders and spheres. As electromagnetics became more demanding, there have been situations with shapes that are irregular and asymmetrical, where analytical techniques are not easily applicable. For t his reason, numerical techniques such as the Method of Moments (MoM) have become widely used, although they can be computationally expensive, especi ally for large-scale problems. The objective of this study was to test the validity of the alternative techniques developed at UMassD known as the S pectral Projection Model (SPM) by systematically comparing its results wit h those obtained using the Method of Moments (MoM) when applied to scatter ing form circular and elliptical cylinders. The MoM technique is used to s olve integral equations by discretizing them and converting it into a syst em of linear equations. The key idea behind SPM is to exploit the addition theorem of Hankel functions, which allows Green’s function to be decomp osed into a series of angular modes. Each mode represents a global wave pa ttern that wraps around the object. Rather than computing interactions bet ween individual surface elements, the problem is reformulated in terms of determining the amplitude of each angular mode. Both methods were implemen ted and tested under identical conditions, and their results were analyzed in terms of accuracy, convergence, and computational efficiency. The SP M produced good agreement with Method of Moments techniques. This work aim s to determine whether SPM can serve as a reliable and efficient alternati ve to conventional numerical methods in the analysis of electromagnetic sc attering. Advisor(s): Dr. Dayalan P. Kasilingam, Professor, Dept. of Elect rical & Computer Engineering, UMASS Dartmouth Committee Members: Dr. David A. Brown, Professor, Dept. of Electrical & Computer Engineering, UMASS Da rtmouth; Dr. Paul J. Gendron, Professor, Dept. of Electrical & Computer En gineering, UMASS Dartmouth NOTE: All ECE Graduate Students are ENCOURAGED to attend. All interested parties are invited to attend. Open to the publi c. *For further information, please contact Dr. Dayalan Kasilingam via ema il at dkasilingam@umassd.edu.\nEvent page: https://www.umassd.edu/events/c ms/elee-research-component-of-phd-qualifier-exam-by-temegni-ulrich-bertaud .php X-ALT-DESC;FMTTYPE=text/html:

Topic: Spectral Projection Mode l for Electromagnetic Scattering from Conducting Objects

Abstract: Electromagnetic analysis for many years has depended on both analytical a nd numerical methods. Analytical methods could provide accurate solutions\ , but they could only be used for basic shapes like circular cylinders and spheres. As electromagnetics became more demanding\, there have been situ ations with shapes that are irregular and asymmetrical\, where analytical techniques are not easily applicable. For this reason\, numerical techniqu es such as the Method of Moments (MoM) have become widely used\, although they can be computationally expensive\, especially for large-scale problem s. The objective of this study was to test the validity of the alternative techniques developed at UMassD known as the Spectral Projection Model (SP M) by systematically comparing its results with those obtained using the M ethod of Moments (MoM) when applied to scattering form circular and ellipt ical cylinders. The MoM technique is used to solve integral equations by d iscretizing them and converting it into a system of linear equations. The key idea behind SPM is to exploit the addition theorem of Hankel functions \, which allows Green’s function to be decomposed into a series of angul ar modes. Each mode represents a global wave pattern that wraps around the object. Rather than computing interactions between individual surface ele ments\, the problem is reformulated in terms of determining the amplitude of each angular mode. Both methods were implemented and tested under ident ical conditions\, and their results were analyzed in terms of accuracy\, c onvergence\, and computational efficiency. The SPM produced good agreeme nt with Method of Moments techniques. This work aims to determine whether SPM can serve as a reliable and efficient alternative to conventional nume rical methods in the analysis of electromagnetic scattering.

Advis or(s): Dr. Dayalan P. Kasilingam\, Professor\, Dept. of Electrical & Compu ter Engineering\, UMASS Dartmouth

Committee Members: Dr. David A. Brown\, Professor\, Dept. of Electrical & Computer Engineering\, UMASS Dar tmouth\; Dr. Paul J. Gendron\, Professor\, Dept. of Electrical & Computer Engineering\, UMASS Dartmouth

NOTE: All ECE Graduate Students are ENCOURAGED to attend. All interested parties are invited to attend. Open t o the public.

*For further information\, please contact Dr. Dayala n Kasilingam via email at dkasilingam@umassd.edu.

Event page: https://www.umassd.edu/events/cms/ elee-research-component-of-phd-qualifier-exam-by-temegni-ulrich-bertaud.ph p

DTSTAMP:20260410T163456 DTSTART;TZID=America/New_York:20260429T130000 DTEND;TZID=America/New_York:20260429T150000 LOCATION:Lester W. Cory Conference Room, Science & Engineering Building (SENG), Room 213A SUMMARY;LANGUAGE=en-us:ELEE Research Component of PhD Qualifier Exam by Tem egni Ulrich Bertaud UID:e510b28093f616cb774a7e7411370be4@www.umassd.edu END:VEVENT END:VCALENDAR