Dispersion curves in ocean environments are accurately estimated from received signals through the extraction of instantaneous modal frequencies and corresponding arrival times for long-range propagation. The ultimate goal is to estimate sediment sound speed using the extracted dispersion pattern. The approach extends work previously conducted in dispersion tracking with sequential filtering, i...

The two dimensional with a triangular-lattice cross sectional pattern of elliptic air holes photonic crystal fiber (PCF) is investigated in detail by use of plan wave expansion (PWE) method. Using PWE method, the dependence of dispersion on structure parameters is calculated. We compared the dispersion relations between the circular air holes PCF and the elliptic one. We find that the flatter d...

Pinewood nematode, Bursaphelenchus xylophilus (Steiner &Buhrer) Nickle, spatial dispersion was determined in Scots pine, Pinus sylvestris L., bolts infested with the pine sawyer beetle, Monochamus carolinensis (Olivier) and in bolts without M. carolinensis. According to Taylor's power law and Green's index of dispersion, nematode dispersion was aggregated in both sets of bolts. The degree of ag...

Single-arm three wave interferometer for measuring dispersion in short lengths of fiber Michael Anthony Galle Master of Applied Science Graduate Department of Electrical & Computer Engineering University of Toronto 2007 A simple fiber-based single-arm spectral interferometer to measure the dispersion parameter in short lengths of fiber (< 50 cm) with a measurement precision of 0.0001 ps/nm is d...

The Optical communication network offers very high potential bandwidth and flexibility In terms of high bit-rate transmission. However, their performance slows down due to some parameter like dispersion, attenuation, scattering and unsynchronized bit pattern. A chromatic dispersion compensator plays an essential role in the optical fiber communications system in order to recover the degraded tr...

• The problem of dispersion of an indicator by laminar flow in a cylindrical tube of radius, R, was recently examined by Taylor. Initially the tube may be filled with indicator-free solution, and then the indicator solution "washed in," or it may be filled with solution containing indicator, which is then "washed out" with indicator-free solution. Taylor obtained equations for the mean concentr...

There have been several recent suggestions that the Milky Way has rotating bar-like features based on HI and star count data. In this paper, I show that such features cause distinctive stellar kinematic signatures near OLR and ILR. The effects of these resonances may be observable far from the peak density of the pattern and relatively nearby the solar position. The details of the kinematic sig...