Julian Lewkowicz
IBM
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Publication
Featured researches published by Julian Lewkowicz.
Applied Optics | 1984
Donald K. Cohen; Wing Ho Gee; M. Ludeke; Julian Lewkowicz
The use of an astigmatic lens to generate a position error signal (PES) suitable for servo control is discussed. A simple computer model was written that can predict adequately the performance of an astigmatic system. The effect of various system parameters on the PES is presented.
Applications of Artificial Neural Networks | 1983
Julian Lewkowicz; Donald K. Cohen
It is shown that focus error signal spectrum, measured while disk is spinning, represents Fourier transform of the disk profile modified by the loop gain.
Archive | 1989
Warren L. Bletscher; Julian Lewkowicz; Morovat Tayefeh
Archive | 1991
David E. Call; Julian Lewkowicz
Archive | 1992
David E. Call; Glen Alan Jaquette; Julian Lewkowicz
Archive | 1990
Silvio Antonio Cardero; Brian Gerard Goodman; Julian Lewkowicz
Archive | 1976
Samuel David Cheatham; Julian Lewkowicz
Archive | 1990
David E. Call; Julian Lewkowicz
Archive | 1978
Julian Lewkowicz
Archive | 1988
Joseph Howard Dimatteo; Alan August Fennema; Benjamin C. Fiorino; Julian Lewkowicz
