Experimental study of the turbulent boundary layer in acceleration-skewed oscillatory flow

Peer reviewedPublisher PD

Subsurface processes generated by bore-driven swash on coarse-grained beaches

Peer reviewedPublisher PD

Experimental study of bore-driven swash hydrodynamics on impermeable rough slopes

Copyright 2012 Elsevier B.V., All rights reserved.Peer reviewedPublisher PD

GeneRepair - A Repair Operator for Genetic Algorithms

In this paper we present the outcome of two recent sets of experiments to evaluate the effectiveness of a new adjunct genetic operator GeneRepair. This operator was developed to correct invlaid tours which may be generated following crossover or mutation of our particular implementation of the genetic algorithm. Following implementation and testing of our genetic algotihm with GeneRepair we found a significant positive side in our results. Using GeneRepair along side traditional corsover and mutation operators we have been able to travers the search space of a problem and generate very good results in an extremely efficent manner, in both time and number of evaluations required

Infections by Kudoa ciliatae (Myxozoa: Myxosporea) in Indo-Pacific whiting Sillago spp.

Infections by Kudoa ciliatae Lom, Rohde & Dykova, 1992 were detected in 141 (32%) of 444 Indo-Pacific whiting Sillago spp, caught in Moreton Bay, Australia. The parasite was detected in the type host, S. ciliata (in 14% of 73 fish), and from 2 new hosts, S, maculata (46% of 264) and S. analis (9% of 107). Prevalence of infection in S. maculata was greatest in autumn (100%) and lowest in spring (10%), the seasonal differences being positively correlated to host size (more prevalent in larger fish caught in autumn). Intensity of infection ranged from 1 to 45 cysts per fish (mean 7.6) and the cysts measured up to 2.5 mm in length. Most cysts were located on the serosal surface of the intestinal tract extending into the circular smooth muscle layer. The majority were found in the distal third of the intestine, often in groups of 2 to 5 cysts. Parasites were also found for the first time in the pyloric caeca, intestinal mesentery and liver. Calcified cysts were occasionally detected in S, ciliata and S, analis

Analysis of IUE spectra of helium-rich white dwarf stars

We studied the class of DB white dwarf stars, using re-calibrated UV spectra for thirty four DBs obtained with the IUE satellite. By comparing the observed energy distributions with model atmospheres, we simultaneously determine spectroscopic distances (d), effective temperature (Teff), and surface gravities (log g). Using parallax measurements and previous determinations of Teff and log g from optical spectra, we can study whether the atmospheres of eleven DB stars are consistent with pure He or have a small amount of H contamination. We also report on our observations of seventeen stars with Teff close to the DB instability strip through time series photometry and found them to be non variable within our detection limits.Comment: 8 pages, 5 figure