ORBi Open Repository and Bibliography
In may 2007, the ULg's Administrative Board (joined in June 2007 by the FUSAGx) decided to create an institutional repository and defined a strong institutional self-archiving policy to increase the visibility, accessibility and impact of the University's publications (Board's decision).
This decision led to the official launch, in November 2008, of the ORBi platform including both the Academic Bibliography and the Institutional Repository of the Wallonia-Europe University Academy.
Engineering, computing & technology => Multidisciplinary, general & others
Analysis of some finite difference schemes for slightly noisy time dependent signals - Dumont, Fabien
Various numerical differentiation methods have been developed to compute an approximated derivative of the signal from its discrete values. Amongst them, one of the most commonly applied is the finite difference method.
Particularly in the case of experimental data, substantial noise or imprecision may be present in the signal. And here is the crux of the matter: straightforward schemes with short-differentiation steps will amplify this noise, often so much that the result appears to be unusable. While increasing the differentiation step has the positive effect of decreasing the noise, it also has two adverse effects: it produces a time shift compared...
Cellular regulation mechanisms : case study of up and down states in the Purkinje cell - Wehenkel, Marie
In 1963, Hodgkin and Huxley obtained the Nobel Prize to have shown that the electrical activity of a neuron could be modelled by an electrical RC circuit containing non-linear conductances. This discovery made it possible to reproduce the electrical behaviour of neurons with a level of detail that has steadily increased over the last fifty years as new quantitative knowledge became available about the specific ionic currents that regulate the activity of a given neuron. But models with too many details are often non-robust and too complex for analysis. As control engineers need simplified models for control design, experimental neurophysiologists...