photos exhibition ->
text INTERMITTENT .pdf ->
develloped together with Claudia Robles
... is an audio-visual installation consisting of one video projection
and a four-channel audio setup with one subwoofer (4.1). The speakers
are arranged in a quadratic setup depending on the given exhibition space.
The video and sound material is looping permanently, and is controlled
by a dynamical system in the background.
The behavior of the background dynamics, or logistic map, is one of the
simplest dynamical systems to exhibit complex motion: x[n+1] = a x[n]
(1 – x[n])
The time evolution of this map is controlled by a, the so-called bifurcation
parameter. By varying this parameter, it is possible to explore a multiplicity
of different motion patterns ranging from simple periodic oscillations
to non-periodic behavior, which is also known as deterministic chaos.
For Intermittent, we have selected a phenomenon called
intermittency from this rich set of dynamic behaviors. Intermittency is
a motion pattern that alternates between ordered periodic oscillations
and outbreaks into chaotic movements. To obtain such behavior from the
logistical map, the parameter a has to be set to 3.8283, a value that
is just at the border between chaos and order. These alternating intervals
of periodic and chaotic motions have unpredictable lengths. This is an
important feature of deterministic chaos: structures, which are often
easily recognizable, also contain an unpredictable element.
Any oscillation are mapped onto an interval of frames within a video file.
This interval loops slowly through the whole video. Any new value x[n+1]
from the logistic function makes the movie jump to a certain position
within the interval, where the movie continues to play ...->