TY - JOUR A1 - Bauer, Siegfried A1 - Lang, Sidney B. T1 - Pyroelectric polymer electrets Y1 - 1996 ER - TY - JOUR A1 - Gerhard, Reimund A1 - Lang, Sidney B. T1 - Obituaries - Dilip Kumar Das-Gupta Y1 - 2002 ER - TY - JOUR A1 - Tuncer, Enis A1 - Lang, Sidney B. T1 - Numerical extraction of distributions of space-charge and polarization from laser intensity modulation method N2 - The Fredholm integral equation of the laser intensity modulation method is an ill-conditioned problem with multiple solutions. An approach based on an application of the Monte Carlo technique and a least-squares solver is developed and tested on simulated data containing both Gaussian and white noise. Good agreement between the original polarization and the estimated one was found. The influences of bin size and spacing, and errors in material properties, are discussed. It is shown that the presented approach is an alternative to other data analysis techniques in the literature based on regularization algorithms. (C) 2005 American Institute of Physics Y1 - 2005 SN - 0003-6951 ER - TY - JOUR A1 - Mellinger, Axel A1 - Singh, Rajeev A1 - Wegener, Michael A1 - Wirges, Werner A1 - Gerhard, Reimund A1 - Lang, Sidney B. T1 - Three-dimensional mapping of polarization profiles with thermal pulses N2 - High-resolution, large-area three-dimensional mapping of polarization profiles in electret polymers was carried out by means of a fast thermal pulse technique with a focused laser beam. A lateral resolution of 38 mu m and a near- surface depth resolution of less than 0.5 mu m was achieved. At larger depths, fast thermal diffusion in the metal electrode rather than the laser spot size becomes the limiting factor for the lateral resolution. (c) 2005 American Institute of Physics Y1 - 2005 SN - 0003-6951 ER - TY - JOUR A1 - Lang, Sidney B. A1 - Mellinger, Axel T1 - A package of Mathematica programs for training students in the use of LIMM and its analysis N2 - A package of programs written using the symbolic mathematics program, Mathematicatrademark, has been developed. Its principal usage is in teaching the LIMM method to students and demonstrating data analysis by means of the Polynomial Regularization Method (PRM). A large number of variables can be changed in the program and their effects can be shown graphically. Students at the University of Potsdam and Monash University have used the program successfully Y1 - 2005 ER - TY - JOUR A1 - Mellinger, Axel A1 - Flores Suárez, Rosaura A1 - Singh, Rajeev A1 - Wegener, Michael A1 - Wirges, Werner A1 - Lang, Sidney B. A1 - Gerhard, Reimund T1 - High-resolution space-charge and polarization tomography with thermal pulses N2 - Die Arbeit wurde am 13.03.2006 mit dem "BEST PAPER AWARD" des deutschen IEEE Instrumentation and Measurement (I&M) Chapter ausgezeichnet. Y1 - 2006 SN - 3-8007-2939-3 ER -