The study was done to compare the corneal curvature readings obtained by Baush and Lomb manual keratometer with that of Nidek autokeratometer ARK-30 to find if either was superior to the other. Curvature of central 3mm corneal zone was measured in horizontal and vertical meridian with Bausch and Lomb manual keratometer and Nidek autokeratometer ARK30 in 67 eyes of 52 patients between the age gr...

This work studies the frequency behavior of t h e Lomb method to estimate the power spectral density (PSD) of heart rate (HR) unevenly sampled (UNS) signals. When the UNS can be modeled as uniform plus a random deviation (approximation well satisfied in HR signals), this spectra results in a periodic repa ti t ion of the original continuous t ime spectrum at the mean Nyquist frequency, with a l...

Using Bayesian probability theory we demonstrate that the Lomb-Scargle periodogram may be generalized in a straightforward manner to nonuniformly nonsimultaneously sampled quadrature data when the sinusoid has arbitrary amplitude modulation. This generalized Lomb-Scargle periodogram is the sufficient statistic for single frequency estimation in a wide class of problems ranging from stationary f...

Manuela Campanelli, 2 Carlos O. Lousto, Yosef Zlochower, Badri Krishnan, and David Merritt 2 Center for Gravitational Wave Astronomy, Department of Physics and Astronomy, The University of Texas at Brownsville, Brownsville, Texas 78520 Center for Computational Relativity and Gravitation, School of Mathematical Sciences, Rochester Institute of Technology, 78 Lomb Memorial Drive, Rochester, New Y...