TY - CONF
T1 - A 2D profile reconstruction in a multilayered waveguide structure
T2 - Antennas and Propagation Society International Symposium, 2003. IEEE
Y1 - 2003
A1 - Seydou,F.
A1 - Duraiswami, Ramani
A1 - Seppanen,T.
KW - (mathematics);
KW - 2D
KW - dual
KW - duality
KW - electromagnetic
KW - equations;
KW - inhomogeneous
KW - Maxwell
KW - media;
KW - method;
KW - multilayered
KW - multilayers;
KW - profile
KW - reconstruction;
KW - scattering;
KW - space
KW - structure;
KW - theory;
KW - wave
KW - waveguide
KW - waveguides;
AB - 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.
JA - Antennas and Propagation Society International Symposium, 2003. IEEE
VL - 1
M3 - 10.1109/APS.2003.1217513
ER -
TY - CONF
T1 - A boundary element method for electromagnetic scattering by multiple cylinders
T2 - Antennas and Propagation Society International Symposium, 2003. IEEE
Y1 - 2003
A1 - Seydou,F.
A1 - Duraiswami, Ramani
A1 - Seppanen,T.
KW - algorithm;
KW - boundary
KW - boundary-elements
KW - cylinders;
KW - electromagnetic
KW - element
KW - equations;
KW - Fredholm
KW - integral
KW - method;
KW - methods;
KW - multiple
KW - Nystrom
KW - scattering;
KW - two-dimensional
KW - type
KW - wave
AB - 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.
JA - Antennas and Propagation Society International Symposium, 2003. IEEE
VL - 3
M3 - 10.1109/APS.2003.1219899
ER -
TY - CONF
T1 - Electromagnetic scattering from a multilayered cylindrical waveguide
T2 - Antennas and Propagation Society International Symposium, 2003. IEEE
Y1 - 2003
A1 - Seydou,F.
A1 - Duraiswami, Ramani
A1 - Seppanen,T.
KW - circular
KW - core;
KW - cylinder;
KW - cylindrical
KW - dielectric
KW - dielectric-loaded
KW - electromagnetic
KW - EM
KW - equations;
KW - matching;
KW - Maxwell
KW - mode
KW - multilayered
KW - scattering;
KW - theory;
KW - wave
KW - waveguide
KW - waveguide;
KW - waveguides;
AB - 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.
JA - Antennas and Propagation Society International Symposium, 2003. IEEE
VL - 3
M3 - 10.1109/APS.2003.1219855
ER -
TY - CONF
T1 - HRTF personalization using anthropometric measurements
T2 - Applications of Signal Processing to Audio and Acoustics, 2003 IEEE Workshop on.
Y1 - 2003
A1 - Zotkin,Dmitry N
A1 - Hwang,J.
A1 - Duraiswami, Ramani
A1 - Davis, Larry S.
KW - acoustic
KW - anthropometric
KW - audio
KW - audio;
KW - auditory
KW - Ear
KW - functions;
KW - Head
KW - head-and-torso
KW - HRTF
KW - individualized
KW - localization;
KW - measurements;
KW - model;
KW - models;
KW - parameters;
KW - perception;
KW - personalization;
KW - physiological
KW - processing;
KW - related
KW - scattering;
KW - scene;
KW - signal
KW - sound
KW - spatial
KW - subjective
KW - transfer
KW - virtual
KW - wave
AB - 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.
JA - Applications of Signal Processing to Audio and Acoustics, 2003 IEEE Workshop on.
M3 - 10.1109/ASPAA.2003.1285855
ER -
TY - CONF
T1 - Integral equation solution of electromagnetic scattering from a multilayered cylindrical waveguide
T2 - Antennas and Propagation Society International Symposium, 2003. IEEE
Y1 - 2003
A1 - Seydou,F.
A1 - Duraiswami, Ramani
A1 - Seppanen,T.
KW - approximation
KW - circular
KW - core;
KW - cylinder;
KW - cylindrical
KW - dielectric
KW - dielectric-loaded
KW - electromagnetic
KW - EM
KW - equations;
KW - integral
KW - Maxwell
KW - method;
KW - multilayered
KW - numerical
KW - Nystrom
KW - scattering;
KW - theory;
KW - wave
KW - waveguide
KW - waveguides;
AB - 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.
JA - Antennas and Propagation Society International Symposium, 2003. IEEE
VL - 3
M3 - 10.1109/APS.2003.1219901
ER -
TY - CONF
T1 - A simplified Newton method for the inverse orthotropic problem
T2 - Antennas and Propagation Society International Symposium, 2003. IEEE
Y1 - 2003
A1 - Seydou,F.
A1 - Seppanen,T.
A1 - Duraiswami, Ramani
KW - algebra;
KW - electromagnetic
KW - inhomogeneous
KW - inverse
KW - matrix
KW - matrix;
KW - media;
KW - medium;
KW - method;
KW - Newton
KW - orthotropic
KW - problem;
KW - problems;
KW - scattering;
KW - wave
AB - 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.
JA - Antennas and Propagation Society International Symposium, 2003. IEEE
VL - 1
M3 - 10.1109/APS.2003.1217514
ER -
TY - CONF
T1 - Three dimensional acoustic scattering from an M multilayered domain via an integral equation approach
T2 - Antennas and Propagation Society International Symposium, 2003. IEEE
Y1 - 2003
A1 - Seydou,F.
A1 - Duraiswami, Ramani
A1 - Seppanen,T.
KW - acoustic
KW - collocation
KW - dimensional
KW - domain;
KW - equation;
KW - equations;
KW - fast
KW - inhomogeneous
KW - integral
KW - matrix
KW - media;
KW - method;
KW - methods;
KW - multilayered
KW - multilayers;
KW - multiple
KW - multiplication;
KW - multiplications;
KW - scattering;
KW - three
KW - vector
KW - wave
AB - 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.
JA - Antennas and Propagation Society International Symposium, 2003. IEEE
VL - 1
M3 - 10.1109/APS.2003.1217547
ER -
TY - CONF
T1 - Advances in spherical harmonic device modeling: calibration and nanoscale electron dynamics
T2 - Simulation of Semiconductor Processes and Devices, 1999. SISPAD '99. 1999 International Conference on
Y1 - 1999
A1 - Lin,Chung-Kai
A1 - Goldsman,N.
A1 - Mayergoyz, Issak D
A1 - Aronowitz,S.
A1 - Belova,N.
KW - Boltzmann
KW - characteristics;SHBTE
KW - current;surface
KW - device
KW - dynamics;spherical
KW - electron
KW - equation;calibration;semiconductor
KW - equation;I-V
KW - harmonic
KW - model;substrate
KW - models;surface
KW - scattering;
KW - scattering;Boltzmann
KW - simulation;calibration;nanoscale
KW - transport
AB - 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
JA - Simulation of Semiconductor Processes and Devices, 1999. SISPAD '99. 1999 International Conference on
M3 - 10.1109/SISPAD.1999.799287
ER -
TY - JOUR
T1 - Models and high-performance algorithms for global BRDF retrieval
JF - Computational Science Engineering, IEEE
Y1 - 1998
A1 - Zengyan Zhang
A1 - Kalluri, SNV
A1 - JaJa, Joseph F.
A1 - Liang,Shunlin
A1 - Townshend,J.R.G.
KW - algorithms;
KW - BRDF
KW - Earth
KW - geomorphology;
KW - geophysical
KW - global
KW - high-performance
KW - IBM
KW - information
KW - light
KW - machines;
KW - models;
KW - Parallel
KW - processing;
KW - reflectivity;
KW - retrieval
KW - retrieval;
KW - scattering;
KW - signal
KW - SP2;
KW - surface;
AB - 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
VL - 5
SN - 1070-9924
CP - 4
M3 - 10.1109/99.735892
ER -
TY - JOUR
T1 - 2-D MOSFET modeling including surface effects and impact ionization by self-consistent solution of the Boltzmann, Poisson, and hole-continuity equations
JF - Electron Devices, IEEE Transactions on
Y1 - 1997
A1 - Liang,Wenchao
A1 - Goldsman,N.
A1 - Mayergoyz, Issak D
A1 - Oldiges,P.J.
KW - 2D
KW - characteristics;LDD
KW - concentration;electron
KW - concentration;hole-continuity
KW - density;electron-hole
KW - density;impact
KW - device
KW - distribution
KW - effects;surface
KW - equation;collision
KW - equation;I-V
KW - equation;MOSFET;electron
KW - equations;impact
KW - equations;semiconductor
KW - function;electron
KW - generation;electron-hole
KW - harmonic
KW - integral;electron
KW - ionisation;integral
KW - ionization;self-consistent
KW - method;Boltzmann
KW - method;surface
KW - modeling;Boltzmann
KW - models;surface
KW - MOSFET
KW - MOSFET;Poisson
KW - pair
KW - potential;hole
KW - recombination;electrostatic
KW - recombination;hole
KW - scattering;
KW - scattering;two-dimensional
KW - simulation
KW - solution;spherical
KW - submicron
KW - temperature;electron-hole
KW - transport
AB - 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
VL - 44
SN - 0018-9383
CP - 2
M3 - 10.1109/16.557713
ER -
TY - JOUR
T1 - RF scattering and radiation by using a decoupled Helmholtz equation approach
JF - Magnetics, IEEE Transactions on
Y1 - 1993
A1 - D'Angelo,J.
A1 - Mayergoyz, Issak D
KW - 3D
KW - analysis;
KW - approach;
KW - computer-efficient
KW - computing;
KW - decoupled
KW - domain;
KW - electrical
KW - electromagnetic
KW - element
KW - engineering
KW - equation
KW - finite
KW - finite-element
KW - formulation;
KW - Frequency
KW - frequency-domain
KW - Helmholtz
KW - method;
KW - Physics
KW - problems;
KW - propagation;
KW - radiation
KW - radiowave
KW - RF
KW - scattering;
KW - wave
AB - 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
VL - 29
SN - 0018-9464
CP - 2
M3 - 10.1109/20.250811
ER -