%0 Conference Paper
%B Antennas and Propagation Society International Symposium, 2003. IEEE
%D 2003
%T A 2D profile reconstruction in a multilayered waveguide structure
%A Seydou,F.
%A Duraiswami, Ramani
%A Seppanen,T.
%K (mathematics);
%K 2D
%K dual
%K duality
%K electromagnetic
%K equations;
%K inhomogeneous
%K Maxwell
%K media;
%K method;
%K multilayered
%K multilayers;
%K profile
%K reconstruction;
%K scattering;
%K space
%K structure;
%K theory;
%K wave
%K waveguide
%K waveguides;
%X 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.
%B Antennas and Propagation Society International Symposium, 2003. IEEE
%V 1
%P 531 - 534 vol.1 - 531 - 534 vol.1
%8 2003/06//
%G eng
%R 10.1109/APS.2003.1217513
%0 Conference Paper
%B Antennas and Propagation Society International Symposium, 2003. IEEE
%D 2003
%T A boundary element method for electromagnetic scattering by multiple cylinders
%A Seydou,F.
%A Duraiswami, Ramani
%A Seppanen,T.
%K algorithm;
%K boundary
%K boundary-elements
%K cylinders;
%K electromagnetic
%K element
%K equations;
%K Fredholm
%K integral
%K method;
%K methods;
%K multiple
%K Nystrom
%K scattering;
%K two-dimensional
%K type
%K wave
%X 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.
%B Antennas and Propagation Society International Symposium, 2003. IEEE
%V 3
%P 516 - 519 vol.3 - 516 - 519 vol.3
%8 2003/06//
%G eng
%R 10.1109/APS.2003.1219899
%0 Conference Paper
%B Antennas and Propagation Society International Symposium, 2003. IEEE
%D 2003
%T Electromagnetic scattering from a multilayered cylindrical waveguide
%A Seydou,F.
%A Duraiswami, Ramani
%A Seppanen,T.
%K circular
%K core;
%K cylinder;
%K cylindrical
%K dielectric
%K dielectric-loaded
%K electromagnetic
%K EM
%K equations;
%K matching;
%K Maxwell
%K mode
%K multilayered
%K scattering;
%K theory;
%K wave
%K waveguide
%K waveguide;
%K waveguides;
%X 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.
%B Antennas and Propagation Society International Symposium, 2003. IEEE
%V 3
%P 332 - 335 vol.3 - 332 - 335 vol.3
%8 2003/06//
%G eng
%R 10.1109/APS.2003.1219855
%0 Conference Paper
%B Applications of Signal Processing to Audio and Acoustics, 2003 IEEE Workshop on.
%D 2003
%T HRTF personalization using anthropometric measurements
%A Zotkin,Dmitry N
%A Hwang,J.
%A Duraiswami, Ramani
%A Davis, Larry S.
%K acoustic
%K anthropometric
%K audio
%K audio;
%K auditory
%K Ear
%K functions;
%K Head
%K head-and-torso
%K HRTF
%K individualized
%K localization;
%K measurements;
%K model;
%K models;
%K parameters;
%K perception;
%K personalization;
%K physiological
%K processing;
%K related
%K scattering;
%K scene;
%K signal
%K sound
%K spatial
%K subjective
%K transfer
%K virtual
%K wave
%X Individualized head related transfer functions (HRTFs) are needed for accurate rendering of spatial audio, which is important in many applications. Since these are relatively tedious to acquire, they may not be acceptable for some applications. A number of studies have sought to perform simple customization of the HRTF. We propose and test a strategy for HRTF personalization, based on matching certain anthropometric ear parameters with the HRTF database, and the incorporation of a low-frequency "head-and-torso" model. We present preliminary tests aimed at evaluation of this customization. Results show that the approach improves both the accuracy of the localization and subjective perception of the virtual auditory scene.
%B Applications of Signal Processing to Audio and Acoustics, 2003 IEEE Workshop on.
%P 157 - 160
%8 2003/10//
%G eng
%R 10.1109/ASPAA.2003.1285855
%0 Conference Paper
%B Antennas and Propagation Society International Symposium, 2003. IEEE
%D 2003
%T Integral equation solution of electromagnetic scattering from a multilayered cylindrical waveguide
%A Seydou,F.
%A Duraiswami, Ramani
%A Seppanen,T.
%K approximation
%K circular
%K core;
%K cylinder;
%K cylindrical
%K dielectric
%K dielectric-loaded
%K electromagnetic
%K EM
%K equations;
%K integral
%K Maxwell
%K method;
%K multilayered
%K numerical
%K Nystrom
%K scattering;
%K theory;
%K wave
%K waveguide
%K waveguides;
%X 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.
%B Antennas and Propagation Society International Symposium, 2003. IEEE
%V 3
%P 524 - 527 vol.3 - 524 - 527 vol.3
%8 2003/06//
%G eng
%R 10.1109/APS.2003.1219901
%0 Conference Paper
%B Antennas and Propagation Society International Symposium, 2003. IEEE
%D 2003
%T A simplified Newton method for the inverse orthotropic problem
%A Seydou,F.
%A Seppanen,T.
%A Duraiswami, Ramani
%K algebra;
%K electromagnetic
%K inhomogeneous
%K inverse
%K matrix
%K matrix;
%K media;
%K medium;
%K method;
%K Newton
%K orthotropic
%K problem;
%K problems;
%K scattering;
%K wave
%X We consider one of the most challenging inverse problems in electromagnetic scattering for inhomogeneous medium. We try to reconstruct the elements of a matrix from scattering data in an orthotropic medium. To solve the inverse problem, we implement a simplified Newton method and present some numerical results.
%B Antennas and Propagation Society International Symposium, 2003. IEEE
%V 1
%P 535 - 538 vol.1 - 535 - 538 vol.1
%8 2003/06//
%G eng
%R 10.1109/APS.2003.1217514
%0 Conference Paper
%B Antennas and Propagation Society International Symposium, 2003. IEEE
%D 2003
%T Three dimensional acoustic scattering from an M multilayered domain via an integral equation approach
%A Seydou,F.
%A Duraiswami, Ramani
%A Seppanen,T.
%K acoustic
%K collocation
%K dimensional
%K domain;
%K equation;
%K equations;
%K fast
%K inhomogeneous
%K integral
%K matrix
%K media;
%K method;
%K methods;
%K multilayered
%K multilayers;
%K multiple
%K multiplication;
%K multiplications;
%K scattering;
%K three
%K vector
%K wave
%X 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.
%B Antennas and Propagation Society International Symposium, 2003. IEEE
%V 1
%P 669 - 672 vol.1 - 669 - 672 vol.1
%8 2003/06//
%G eng
%R 10.1109/APS.2003.1217547
%0 Conference Paper
%B Simulation of Semiconductor Processes and Devices, 1999. SISPAD '99. 1999 International Conference on
%D 1999
%T Advances in spherical harmonic device modeling: calibration and nanoscale electron dynamics
%A Lin,Chung-Kai
%A Goldsman,N.
%A Mayergoyz, Issak D
%A Aronowitz,S.
%A Belova,N.
%K Boltzmann
%K characteristics;SHBTE
%K current;surface
%K device
%K dynamics;spherical
%K electron
%K equation;calibration;semiconductor
%K equation;I-V
%K harmonic
%K model;substrate
%K models;surface
%K scattering;
%K scattering;Boltzmann
%K simulation;calibration;nanoscale
%K transport
%X Improvements in the Spherical Harmonic (SH) method for solving Boltzmann Transport Equation (BTE) are presented. The simulation results provide the same physical detail as analytical band Monte Carlo (MC) calculations, and are obtained approximately a thousand times faster. A new physical model for surface scattering has also been developed. As a result, the SHBTE model achieves calibration for a complete process of I-V characteristics and substrate current consistently for the first time
%B Simulation of Semiconductor Processes and Devices, 1999. SISPAD '99. 1999 International Conference on
%P 167 - 170
%8 1999///
%G eng
%R 10.1109/SISPAD.1999.799287
%0 Journal Article
%J Computational Science Engineering, IEEE
%D 1998
%T Models and high-performance algorithms for global BRDF retrieval
%A Zengyan Zhang
%A Kalluri, SNV
%A JaJa, Joseph F.
%A Liang,Shunlin
%A Townshend,J.R.G.
%K algorithms;
%K BRDF
%K Earth
%K geomorphology;
%K geophysical
%K global
%K high-performance
%K IBM
%K information
%K light
%K machines;
%K models;
%K Parallel
%K processing;
%K reflectivity;
%K retrieval
%K retrieval;
%K scattering;
%K signal
%K SP2;
%K surface;
%X The authors describe three models for retrieving information related to the scattering of light on the Earth's surface. Using these models, they've developed algorithms for the IBM SP2 that efficiently retrieve this information
%B Computational Science Engineering, IEEE
%V 5
%P 16 - 29
%8 1998/12//oct
%@ 1070-9924
%G eng
%N 4
%R 10.1109/99.735892
%0 Journal Article
%J Electron Devices, IEEE Transactions on
%D 1997
%T 2-D MOSFET modeling including surface effects and impact ionization by self-consistent solution of the Boltzmann, Poisson, and hole-continuity equations
%A Liang,Wenchao
%A Goldsman,N.
%A Mayergoyz, Issak D
%A Oldiges,P.J.
%K 2D
%K characteristics;LDD
%K concentration;electron
%K concentration;hole-continuity
%K density;electron-hole
%K density;impact
%K device
%K distribution
%K effects;surface
%K equation;collision
%K equation;I-V
%K equation;MOSFET;electron
%K equations;impact
%K equations;semiconductor
%K function;electron
%K generation;electron-hole
%K harmonic
%K integral;electron
%K ionisation;integral
%K ionization;self-consistent
%K method;Boltzmann
%K method;surface
%K modeling;Boltzmann
%K models;surface
%K MOSFET
%K MOSFET;Poisson
%K pair
%K potential;hole
%K recombination;electrostatic
%K recombination;hole
%K scattering;
%K scattering;two-dimensional
%K simulation
%K solution;spherical
%K submicron
%K temperature;electron-hole
%K transport
%X We present a new two-dimensional (2-D) MOSFET simulation method achieved by directly solving the Boltzmann transport equation for electrons, the hole-current continuity equation, and the Poisson equation self-consistently. The spherical harmonic method is used for the solution of the Boltzmann equation. The solution directly gives the electron distribution function, electrostatic potential, and the hole concentration for the entire 2-D MOSFET. Average quantities such as electron concentration and electron temperature are obtained directly from the integration of the distribution function. The collision integral is formulated to arbitrarily high spherical harmonic order, and new collision terms are included that incorporate effects of surface scattering and electron-hole pair recombination/generation. I-V characteristics, which agree with experiment, are calculated directly from the distribution function for an LDD submicron MOSFET. Electron-hole pair generation due to impact ionization is also included by direct application of the collision integral. The calculations are efficient enough for day-to-day engineering design on workstation-type computers
%B Electron Devices, IEEE Transactions on
%V 44
%P 257 - 267
%8 1997/02//
%@ 0018-9383
%G eng
%N 2
%R 10.1109/16.557713
%0 Journal Article
%J Magnetics, IEEE Transactions on
%D 1993
%T RF scattering and radiation by using a decoupled Helmholtz equation approach
%A D'Angelo,J.
%A Mayergoyz, Issak D
%K 3D
%K analysis;
%K approach;
%K computer-efficient
%K computing;
%K decoupled
%K domain;
%K electrical
%K electromagnetic
%K element
%K engineering
%K equation
%K finite
%K finite-element
%K formulation;
%K Frequency
%K frequency-domain
%K Helmholtz
%K method;
%K Physics
%K problems;
%K propagation;
%K radiation
%K radiowave
%K RF
%K scattering;
%K wave
%X A novel finite-element formulation for the solution of 3-D RF scattering and radiation problems is presented. This formulation is based on the solution of a set of decoupled Helmholtz equations for the Cartesian components of the field vectors. This results in a robust, computer-efficient method that eliminates previous difficulties associated with `curl-curl' type partial differential equations. Although it is presented in the frequency domain, the method is easily extendible to the time domain
%B Magnetics, IEEE Transactions on
%V 29
%P 2040 - 2042
%8 1993/03//
%@ 0018-9464
%G eng
%N 2
%R 10.1109/20.250811