20 research outputs found
Validation of Observed Bedload Transport Pathways Using Morphodynamic Modeling
Phenomena related to braiding, including local scour and fill, channel bar development, migration
and avulsion, make numerical morphodynamic modeling of braided rivers challenging. This paper investigates
the performance of a Delft3D model, in a 2D depth-averaged formulation, to simulate the
morphodynamics of an anabranch of the Rees River (New Zealand). Model performance is evaluated using
data from field surveys collected on the falling limb of a major high flow, and using several sediment
transport formulas. Initial model results suggest that there is generally good agreement between observed and
modeled bed levels. However, some discrepancies in the bed level estimations were noticed, leading to bed
level, water depth and water velocity estimation errors
Research Update Research News TRENDS in Cognitive Sciences Vol.5 No.10 October 2001
all proportion of such neurons display fluctuations in activity that co-vary with the shifts in perceptual dominance . In fact, many neurons at the early stages of processing in visual cortex continue to respond to their preferred stimulus regardless of whether it is perceptually dominant . It is only in `higher' visual areas, particularly within the temporal lobe, that a greater proportion of neurons show activity that mirrors the ongoing alternations in perceptual dominance observed during binocular rivalry 5,6 . It has even been reported that the shifts in perception are directed by non-visual areas in the frontal lobe 7 or result from competition between the cerebral hemispheres 8 . Based on this and other evidence, it has been argued that neurons in early visual areas (such as primary visual cortex) do not contribute directly to conscious perception. Although this conclusion has been challenged recently 9 there exists a more general dilemma about the interpretation o
Practical hints on colour in painting : illustrated by examples from the works of the Venetian, Flemish, and Dutch schools /
Also published as part 4 of a work, by the author, with title: A treatise on painting, in four parts.Plates after Titian, P. Veronese, Rubens, Vandyke, P. DeHooge, A. V. Ostade, Rembrandt, and A. Cuyp.Mode of access: Internet