BACKGROUND AND AIMS Visual evoked potentials (VEPs) assess the integrity of the visual pathways from the optic nerve to the occipital cortex. Optic disc cupping and visual field loss have been associated with prolongation of latency of VEP in primary open angle glaucoma (POAG). METHODS Pattern reversal and flash VEP tests were done in consenting 20 primary open angle glaucoma eyes and 40 norm...

This paper shows the experimental details of the stabilization scheme that allows full control of the repetition rate and the carrier-envelope offset frequency of a 10 GHz frequency comb based on a femtosecond Ti:sapphire laser. Octave-spanning spectra are produced in nonlinear microstructured optical fiber, in spite of the reduced peak power associated with the 10 GHz repetition rate. Improved...

This paper presents the design of a tri-mode matched feed horn to remove the beam squinting effects in a circularly polarized offset parabolic reflector antenna. In a conical horn, three modes i.e., TE11, TM11 and TE21 are combined in proper amplitude and phase proportion to obtain a tri-mode matched feed configuration. The proposed tri-mode horn is then used as a primary feed device to illumin...

The problem of finding patterns of interest in time series databases (queI)' by content) is an important one, with applications in virWally every field of science. A variety of approaches bave been snggested. These approaches are robust to noise, offset translation, and amplitude scaling to varying degrees. However, they are all extremely sensitive to scaling in the time axis (longitudinal scal...

We introduce and compare three filterbank-based communication methods for cognitive radio systems. In the first method, called Filtered Multitone (FMT), subcarriers are arranged such that adjacent subbands do not overlap. While this makes FMT robust to channel impariments, it leads to considerable losses in bandwidth efficiency. Next, we discuss orthogonal frequency division multiplexing with o...

Power offset is zero-order term in the capacity versus signal-to-noise ratio curve. In this paper, approximate analysis of power offset is presented to describe MIMO system with uniform linear antenna arrays of fixed length. It is assumed that the number of receive antenna is larger than that of transmit antenna. Spatially Correlated MIMO Channel is approximated by tri-diagonal toeplitz matrix....