Methods developed for the qualitative simulation of dy-namical systems have turned out to be powerful tools for studying genetic regulatory networks. We present a generalization of a simulation method based on piecewise-linear differential equation models that is able to deal with discontinuities. The method is sound and has been implemented in a computer… (More)
The functioning and development of living organisms is controlled by large and complex networks of genes, proteins, small molecules, and their interactions, so-called genetic regulatory networks. In this review we discuss a method for the qualitative modeling and simulation of genetic regulatory networks which is well-adapted to the current lack of precise… (More)
Phonocephalography is a simple, passive non-invasive diagnostic technique in tinnitus and cerebral angiology. Pulsatile tinnitus may occur in hypertension, haemodynamic disorders, or extracranial and intracranial vascular abnormalities. It is ignored by otologists and neurologists. Phonocephalography is the amplification and recording of sounds from the… (More)
Phonocephalography is the amplification and recording of sounds from the surface and cavities of the head. It is on trial for a simple, passive non-invasive diagnostic technique in tinnitus and intracranial angiology. This article presents the recordings of normal phonocephalography, i.e. the recording of normal sounds in the head.