2000, Amsterdam - Projects
Gabor Guta (20)
School: University of Debrecen
Hobbies: dancing, playing tennis
Career intention: program designer, mathematician
with ultra low noise
The aim of this project was to construct an ultra low noise
stimulator for cellular electrophysiological experiments. The
stimulator is made up of two independent units: a pulse generator
and a power amplifier. The pulse generator produces accurate
binary signals and the power amplifier generates a square pulse
with appropriate amplitude and without significant noise.
Operation of the pulse generator is based on a micro controller.
Due to this construction the pulse width and cycle length can
be adjusted continuously, and the control panel has an up-to-date
design and is easy to use. The two units are connected through
optical coupling. The power amplifier operates on an analogue
basis. The stimulator (DS-R2) equipped with an isolated power
amplifier developed for physiological research operates reliably
in the desired range. It was tested successfully under laboratory
Ramon Hegedus (18)
School: Bolyai J nos Practicing Grammar School
Hobbies: listening to music, watching movies, visiting
cultural events, doing outdoor sports
Career intention: physicist
Three dimensional fast photography of excimer laser ablation
Photoablation is a way of removing material using (excimer)lasers.
It is used for material machining and tissue removals. It is
a complex process and detailed investigation of the process
is essential to improve currently applied techniques. Several
researches were done (by others) on the modelling of ablation.
But until recently no spatial visualisation has been made of
the ablation plume, the things that happen where the laserbeam
hits the surface. I have used a fast photography set-up with
three video cameras to take snapshots of the ablation. After
implementing the modelling method in a computer program, the
images taken were processed and computer-based spatial models
With my modelling method details currently unknown about ablation
may be revealed. This way effects of the use of excimer lasers
in surgery, for example, can be made more clear .