Estimates of mass transfer timescales from 316 solute transport experiments reported in 35 publications are compared to the pore-water velocities and residence times, as well as the experimental durations. New tracer experiments were also conducted in columns of different lengths so that the velocity and the advective residence time could...
A logical analysis of the common fisheries models used in stock assessment has shown that they produce specific predictions with the logical form of existential statements, fail Karl Popper’s falsifiability criterion, and so cannot be falsified or tested by the empirical evidence. By contrast, the theoretical models of fisheries economics...
The marine fisheries production from African coastal countries, combined with that of freshwater production of
the continent is estimated to be 6 millions metric tons, corresponding only 5 % of the total world production. Africa's
contribution to fisheries products (1,5 %) is insignificant compared to that of world commerce which...
Inhomogeneities in the refractive index induced by temperature fluctuations in turbulent flows have the effect of scattering light in near-forward angles. We have developed a method that extracts the rate of Temperature Variance Dissipation (TVD) and its spectrum from the properties of light scattering and have built an instrument -...