@conference {14034, title = {Computation of Green{\textquoteright}s function for finite-size photonic crystals by boundary element method}, booktitle = {Antennas and Propagation Society International Symposium, 2004. IEEE}, volume = {4}, year = {2004}, month = {2004/06//}, pages = {4320 - 4323 Vol.4 - 4320 - 4323 Vol.4}, abstract = {We have derived a new integral equation method for computing the Green{\textquoteright}s function for 2D electromagnetic wave propagation in a finite size photonic crystal. The method is also used for deriving the multipole expansions for the case of circular cylinders. This derivation is different from the ones in the literature. Our numerical results show an excellent agreement of the two algorithms. In the future we would like to expand the method to the numerical solution of the three-dimensional electromagnetic problem.}, keywords = {2D, boundary, boundary-elements, circular, crystals;, cylinders;, electromagnetic, element, equation, equations;, expansions;, finite-size, function, function;, Green, Green{\textquoteright}s, integral, method;, methods;, multipole, photonic, propagation;, wave}, doi = {10.1109/APS.2004.1330307}, author = {Seydou,F. and Ramahi,O. and Duraiswami, Ramani and Seppdnen,T.} } @conference {14055, title = {A 2D profile reconstruction in a multilayered waveguide structure}, booktitle = {Antennas and Propagation Society International Symposium, 2003. IEEE}, volume = {1}, year = {2003}, month = {2003/06//}, pages = {531 - 534 vol.1 - 531 - 534 vol.1}, abstract = {We discuss the problem of finding a profile or its location for a 2D scattering of electromagnetic waves with fixed frequencies in a waveguide multilayered domain. We use the dual space method (DSM) of Colton and Monk. Our goal is to extend our previous work of TE and TM cases to the more complicated case of a waveguide. We emphasize on the frequency range in the reconstruction.}, keywords = {(mathematics);, 2D, dual, duality, electromagnetic, equations;, inhomogeneous, Maxwell, media;, method;, multilayered, multilayers;, profile, reconstruction;, scattering;, space, structure;, theory;, wave, waveguide, waveguides;}, doi = {10.1109/APS.2003.1217513}, author = {Seydou,F. and Duraiswami, Ramani and Seppanen,T.} } @conference {14054, title = {A boundary element method for electromagnetic scattering by multiple cylinders}, booktitle = {Antennas and Propagation Society International Symposium, 2003. IEEE}, volume = {3}, year = {2003}, month = {2003/06//}, pages = {516 - 519 vol.3 - 516 - 519 vol.3}, abstract = {An integral equation approach is derived for an electromagnetic scattering from M multiple cylinders. The problem is two-dimensional and the integral equation is solved using the Nystrom method. We give numerical examples that illustrate the algorithm.}, keywords = {algorithm;, boundary, boundary-elements, cylinders;, electromagnetic, element, equations;, Fredholm, integral, method;, methods;, multiple, Nystrom, scattering;, two-dimensional, type, wave}, doi = {10.1109/APS.2003.1219899}, author = {Seydou,F. and Duraiswami, Ramani and Seppanen,T.} } @conference {14051, title = {Electromagnetic scattering from a multilayered cylindrical waveguide}, booktitle = {Antennas and Propagation Society International Symposium, 2003. IEEE}, volume = {3}, year = {2003}, month = {2003/06//}, pages = {332 - 335 vol.3 - 332 - 335 vol.3}, abstract = {This paper is devoted to electromagnetic scattering from an N multilayered circular cylinder. We consider waveguides in the z direction; that is, we look for the solution of Maxwell equations along the z direction. We assume a dielectric core and derive a mode matching approach for solving the problem. A numerical result is presented that illustrates the algorithm.}, keywords = {circular, core;, cylinder;, cylindrical, dielectric, dielectric-loaded, electromagnetic, EM, equations;, matching;, Maxwell, mode, multilayered, scattering;, theory;, wave, waveguide, waveguide;, waveguides;}, doi = {10.1109/APS.2003.1219855}, author = {Seydou,F. and Duraiswami, Ramani and Seppanen,T.} } @conference {14053, title = {Integral equation solution of electromagnetic scattering from a multilayered cylindrical waveguide}, booktitle = {Antennas and Propagation Society International Symposium, 2003. IEEE}, volume = {3}, year = {2003}, month = {2003/06//}, pages = {524 - 527 vol.3 - 524 - 527 vol.3}, abstract = {This paper is devoted to the electromagnetic scattering from an N multilayered cylinder. We consider waveguides in the z direction, that is: we look for the solution of Maxwell equations along the z direction. We assume a dielectric core and discuss the problem for the case of general domains. We use an integral equation approach to solve the problem and the Nystrom method for the numerical approximation.}, keywords = {approximation, circular, core;, cylinder;, cylindrical, dielectric, dielectric-loaded, electromagnetic, EM, equations;, integral, Maxwell, method;, multilayered, numerical, Nystrom, scattering;, theory;, wave, waveguide, waveguides;}, doi = {10.1109/APS.2003.1219901}, author = {Seydou,F. and Duraiswami, Ramani and Seppanen,T.} } @conference {14052, title = {Three dimensional acoustic scattering from an M multilayered domain via an integral equation approach}, booktitle = {Antennas and Propagation Society International Symposium, 2003. IEEE}, volume = {1}, year = {2003}, month = {2003/06//}, pages = {669 - 672 vol.1 - 669 - 672 vol.1}, abstract = {An integral equation approach is derived for three dimensional acoustic scattering from an M multilayered domain. The integral equation is solved using the collocation method. To validate the method, we compare the exact and approximate results. The numerous matrix vector multiplications of our method may be thought a disadvantage. This problem can be overcome by using fast multiple methods where these operations are done very quickly.}, keywords = {acoustic, collocation, dimensional, domain;, equation;, equations;, fast, inhomogeneous, integral, matrix, media;, method;, methods;, multilayered, multilayers;, multiple, multiplication;, multiplications;, scattering;, three, vector, wave}, doi = {10.1109/APS.2003.1217547}, author = {Seydou,F. and Duraiswami, Ramani and Seppanen,T.} } @conference {12728, title = {Towards a view invariant gait recognition algorithm}, booktitle = {Proceedings. IEEE Conference on Advanced Video and Signal Based Surveillance, 2003.}, year = {2003}, month = {2003/07//}, pages = {143 - 150}, abstract = {Human gait is a spatio-temporal phenomenon and typifies the motion characteristics of an individual. The gait of a person is easily recognizable when extracted from a side-view of the person. Accordingly, gait-recognition algorithms work best when presented with images where the person walks parallel to the camera image plane. However, it is not realistic to expect this assumption to be valid in most real-life scenarios. Hence, it is important to develop methods whereby the side-view can be generated from any other arbitrary view in a simple, yet accurate, manner. This is the main theme of the paper. We show that if the person is far enough from the camera, it is possible to synthesize a side view (referred to as canonical view) from any other arbitrary view using a single camera. Two methods are proposed for doing this: (i) using the perspective projection model; (ii) using the optical flow based structure from motion equations. A simple camera calibration scheme for this method is also proposed. Examples of synthesized views are presented. Preliminary testing with gait recognition algorithms gives encouraging results. A by-product of this method is a simple algorithm for synthesizing novel views of a planar scene.}, keywords = {(access, algorithm;, analysis;, Biometrics, biometrics;, Calibration, calibration;, camera, canonical, control);, equations;, flow;, Gait, gait;, human, image, invariant, model;, MOTION, optical, perspective, phenomenon;, projection, recognition, scheme;, sequences;, spatio-temporal, view, view;}, doi = {10.1109/AVSS.2003.1217914}, author = {Kale, A. and Chowdhury, A.K.R. and Chellapa, Rama} } @article {15399, title = {Perturbation technique for LLG dynamics in uniformly magnetized bodies subject to RF fields}, journal = {Magnetics, IEEE Transactions on}, volume = {38}, year = {2002}, month = {2002/09//}, pages = {2403 - 2405}, abstract = {The problem of magnetization dynamics of a uniformly magnetized uniaxial particle or film, under elliptically polarized applied field, is considered. In the special case of circularly polarized applied field and particles (films) with a symmetry axis, pure time-harmonic magnetization modes exist that can be computed analytically. Deviations from these highly symmetric conditions are treated as perturbation of the symmetric case. The perturbation technique leads to the exactly solvable system of linear differential equations for the perturbations which enables one to compute higher order magnetization harmonic. The analytical solutions are obtained and then compared with numerical results.}, keywords = {analytical, anisotropy, anisotropy;, applied, bodies;, circularly, component;, constant-in-time, constant;, damping, demagnetisation;, demagnetizing, differential, dynamics;, effective, elliptically, equation;, equations;, exactly, factors;, field;, film;, films;, Frequency, gyromagnetic, harmonic;, higher, Landau-Lifshitz-Gilbert, large, linear, magnetic, magnetisation;, magnetization, magnetization;, magnetized, modes;, MOTION, order, partial, particle;, particles;, perturbation, polarized, radio, ratio;, RF, saturation, solution;, solvable, system;, technique;, techniques;, thin, time-harmonic, uniaxial, uniformly}, isbn = {0018-9464}, doi = {10.1109/TMAG.2002.803596}, author = {Bertotti,G. and Mayergoyz, Issak D and Serpico,C.} } @article {15371, title = {A new point of view on the mathematical structure of Maxwell{\textquoteright}s equations}, journal = {Magnetics, IEEE Transactions on}, volume = {29}, year = {1993}, month = {1993/03//}, pages = {1315 - 1320}, abstract = {It is emphasized that the Maxwell equations have a peculiar mathematical structure which leads to boundary value problems with an overspecified number of partial differential equations and an underspecified number of boundary conditions. An attempt is made to reduce these boundary value problems to standard mathematical formulations with equal numbers of partial differential equations and boundary conditions. It is demonstrated that these formulations have some attractive features which appreciably facilitate their finite element discretizations. A numerical example involving scattering of plane electromagnetic waves from a perfect conducting thin plate illustrates the discussion}, keywords = {analysis;partial, conditions;boundary, conducting, differential, discretizations;mathematical, element, EM, equations;, equations;boundary, equations;boundary-value, equations;perfect, example;partial, Maxwell{\textquoteright}s, plate;plane, problems;electromagnetic, problems;finite, scattering;finite, scattering;Maxwell, structure;numerical, thin, value, wave}, isbn = {0018-9464}, doi = {10.1109/20.250640}, author = {Mayergoyz, Issak D and D{\textquoteright}Angelo,J.} }