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					&lt;FONT SIZE=+2>&lt;B>Archives of ctltheory for Aug26-98&lt;/B>&lt;/FONT>&lt;BR>&lt;HR>&lt;/TD>
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					&lt;TD ALIGN="LEFT">&lt;B>Wed, 26 Aug 1998&lt;/B>&lt;/TD>
					&lt;TD ALIGN="RIGHT">&lt;B>Vol. 1.8&lt;/B>&lt;/TD>
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&lt;A NAME="Contents">&lt;STRONG>Contents&lt;/STRONG>&lt;/A>
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&lt;UL>01. &lt;A HREF="#SUBJECT01">Experiment Leo Schatzl&lt;/A> ()&lt;BR>
02. &lt;A HREF="#SUBJECT02">FLICKER 1.1&lt;/A> ()&lt;BR>
&lt;A NAME="SUBJECT01">&lt;/A>&lt;A HREF="#Contents">Return to Contents&lt;/A>&lt;P>----------------------------------------------------------------------&lt;P>Date: 26 Aug 1998 00:46:43 -0400&lt;BR>
From: jam@timesup.org&lt;BR>
Subject: Experiment Leo Schatzl&lt;P>"Stroboscopes, vibration and visual perception"&lt;BR>
Experiment phase 1: August 03. - 09. 1998&lt;P>&lt;BR>
Prefix:&lt;BR>
The planned experiments are based on two ideas for installations and&lt;BR>
their technical realisation.&lt;BR>
A.&lt;BR>
The realisation of linear 3-D images through differentiated color levels&lt;BR>
(red, green) on larger formats.&lt;BR>
The interest lies in optical results beyond the visualisation through&lt;BR>
filtering lenses (red, green) and the resultiong 3-D illusion. Through&lt;BR>
the utilisation of asynchronously controlled Stroboscopes, equipped with&lt;BR>
optical filters, we are investigating the affirmation upon 3-D effects&lt;BR>
and animation effects.&lt;BR>
B.&lt;BR>
The second idea is dealing with installations with images and/or objects&lt;BR>
in a state of vibration (e.g. upon closing in of a spectator). The&lt;BR>
object changes and removes itself from an "objective" point of&lt;BR>
perception. As an additional investigation we consider to set the&lt;BR>
spectator into a state of vibration as well.&lt;BR>
Reasoning:&lt;BR>
The `object d« art` turns into a technical testobject , the test&lt;BR>
apparatus is similarily an `object d« art`, test object and art object&lt;BR>
are egal.&lt;BR>
The moment of perception, the acceleration in dependence to the&lt;BR>
spectators constitution is the main aspect of interest.&lt;BR>
...........................................................................................................................................................&lt;P>{"rapid standstill", "Ecstasy of chance", "discontinuation of physical&lt;BR>
space", "static vehicle", ....&lt;BR>
Starting points lie in the fields of visual interpretations*) as well as&lt;BR>
in applied technologies**), which are utilising vibrations (of lights&lt;BR>
and object) as a for extraordinary perceptional processes.&lt;BR>
Cf.> (* Motions of vibrations as stylistic element in movies to&lt;BR>
visualize transitions of physical space and consciousness (change of&lt;BR>
space-time-continuum);&lt;BR>
Cf. >(** Motions of vibrations in flight and astonaut simulators;&lt;BR>
> Vibration through attacks of epilepsy, ritual ecstasy, ... ;&lt;BR>
> Vibration in luna parks, on the dance floor....}&lt;BR>
...........................................................................................................................................................&lt;P>Both ideas are to be combined:&lt;BR>
Red and green markings, vibratinf images with green and red graphics,&lt;BR>
asynchronous controlled stroboscopes with color filters, vibrating&lt;BR>
objects with colored markings, vibrating plattforms…. Etc.&lt;BR>
Possible results: a dynamic "Low tech" intallation, a pulsating room&lt;BR>
with fluctuating objects, moving coordinates (not to mention the&lt;BR>
possibilities of an additional usage of sound).&lt;BR>
In the framework of the experiments the basic technical aspects are to&lt;BR>
be tested (apparats of vibration, control of strobes, the setup of&lt;BR>
images, colored filters etc.);&lt;BR>
The visual results will be categorised purely based on aesthetic&lt;BR>
principles.&lt;BR>
__________________________________________________________&lt;BR>
Guide lines:&lt;BR>
• Construction of the technical components for the test series:&lt;BR>
Excenter motor to vibrate heavy objects or body parts, various mounting&lt;BR>
points, exchangeable excenters, frequency control.&lt;BR>
Mechanical "shaking" device to smaller images (with frequency control).&lt;BR>
Elektronic switching for asynchronous control of two stroboscopes with&lt;BR>
frequency control&lt;BR>
• planned experiments:&lt;BR>
Experimental research of perception of Grafics (e.g. anaglyphs) mit 2&lt;BR>
differentiated image color levels (red and green partial images) under&lt;BR>
stroboscopic, color filtered lighting ( 2 asynchronously controlled&lt;BR>
stroboscopes) under static conditions and vibrating image carrier and/or&lt;BR>
spectator.&lt;BR>
> experimental research of visual perception with and without filtering&lt;BR>
glasses.&lt;BR>
> experimental research of the interaction between 'Stroboscopy' and&lt;BR>
'object vibration'&lt;BR>
> Research of the effect of longtime strong vibration (complete and&lt;BR>
partial) on the spectator (subjective perceptional interferences).&lt;BR>
__________________________________________________________&lt;BR>
Log:&lt;BR>
Unfortunately time got to be too short. The preparation for the planned&lt;BR>
experiments took up more than 2/3 of the allocated timeframe.&lt;BR>
Nevertheless the experiences made were everything but boring.&lt;BR>
Considering we are neither techicians nor scientists it is clear that&lt;BR>
the construction of a "RŸttelmotor" (a shaking motor) makes us deal with&lt;BR>
interesting observations and experiences, including planning and&lt;BR>
construction mistakes.&lt;P>&lt;BR>
The plan called for an apparatus to vibrate smaller images (8x6 cm) in&lt;BR>
2D as well as for a construction to vibrate heavy objects and bodily&lt;BR>
parts as well as a circuit board for the stroboscopes.&lt;BR>
All components got finished and tested, but time fell short to gor&lt;BR>
through all the planned experiments and the necessary modification of&lt;BR>
the components.&lt;BR>
Most revealing were the experinces in the construction of the technical&lt;BR>
components. The trials with test grafics (combined with strobe lights,&lt;BR>
with and without vibrations) proofed despite all technical difficulties&lt;BR>
the functioning of some of the basic thoughts (especially the animation&lt;BR>
effects) { cf. below: Test 1-4 }&lt;BR>
Tests about the implementations of vibrations upon a testperson had to&lt;BR>
be postponed.&lt;BR>
The experiments will be continued. Further reports will be published&lt;BR>
here or can be requested via e-mail (> leo@sil.at).&lt;BR>
We are open for any critique, suggestions and reports about similar&lt;BR>
activities.&lt;BR>
- -&lt;P>&lt;BR>
&lt;A NAME="SUBJECT02">&lt;/A>&lt;A HREF="#Contents">Return to Contents&lt;/A>&lt;P>----------------------------------------------------------------------&lt;P>Date: 26 Aug 1998 14:07:23 -0400&lt;BR>
From: prema@thing.net&lt;BR>
Subject: FLICKER 1.1&lt;P>FLICKER&lt;BR>
Test 1.1&lt;P>Hypothesis:&lt;BR>
Flicker rates found in TV static can induce physical and emotional&lt;BR>
responses ranging from meditative to high tension, even epileptic seizures.&lt;P>Set-up:&lt;BR>
*Test subject-New Zealand male&lt;BR>
*Flicker/static sampled from Madrid TV as stimulus&lt;BR>
*IBVA system to measure and monitor brainwave emissions&lt;BR>
*MAX interface to track frequency levels of brain waves&lt;P>Experiment:&lt;BR>
Test subject observes static/flicker.  All responses are recorded.&lt;P>Results:&lt;BR>
1)Slight tightening of chest, waves of anxiety/excitement across chest in&lt;BR>
sync           with horizontal and vertical movement of lines across&lt;BR>
screen.&lt;P>2)Increased frequency of low beta waves over time&lt;P>3)Internal distraction occurs at fairly regular intervals&lt;P>Conclusions:&lt;BR>
Responses occurred, though slight, to stimulus.&lt;BR>
Feedback loop needed to limit internal distraction.&lt;P>&lt;BR>
For Test 2.1&lt;BR>
Translate brainwaves emitted while watching TV static into sound. Create&lt;BR>
feedback loop with sound to intensify response.&lt;P>- -----------------------------------------&lt;BR>
FOUND DATA&lt;P>* Television flickers.  The lines that make up the picture are refreshed 25&lt;BR>
times per second and the whole screen flashes 50 times per second.  Both&lt;BR>
sources of flicker can cause seizures.&lt;BR>
- -Wilkins, Darby, Stefanson, Jeavons and Harding.  Television epilepsy: the&lt;BR>
role of pattern.  Electroencephalography and clinical Neurophysiology.&lt;P>* Flicker is not perceptible at frequencies of about 100 flashes per&lt;BR>
second, but it nevertheless affects firing of cells in the retina and&lt;BR>
subcortical structures.&lt;BR>
- -Berman, Greenhouse, Bailey, Clear, and Raasch. Human electroretinogram&lt;BR>
responses to video displays, fluorescent lighting and other high frequency&lt;BR>
sources.&lt;P>* Heart rate is increased when fluorescent lighting flickers impercetibly.&lt;BR>
- -Watts and Wilkins.  The role of provocative visual stimuli in agoraphobia.&lt;BR>
Psychological Medicine.&lt;P>&lt;P>&lt;P>&lt;BR>
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