ISEN-ASTC-L is a service of the Association of Science-Technology Centers
Incorporated, a worldwide network of science museums and related institutions.
*****************************************************************************
It looks like they have addressed this issue, here is what the rep had
to say:
Just so you know, we have worked
around the problem of bacterial contamination with our design. First,
there
is a very powerful silver nitrate filter that purifies the incoming
water.
Also, our screen uses very little water, and the water is never
standing.
The biggest problem with bacterial growth is if water is pooling for
long
periods of time. Our pumps keep water moving in the hoses, and the
transducers keep water emptying from the tank. Additionally, we ask our
clients to empty the tank and hose system by reversing the pump at the
end
of each day (assuming it is not running 24 hours). Finally, our
cleaning
procedure recommends wiping down all the surfaces using a mild soap
(twice a
month at minimum). Using a very strong bleach can actually create a
worse
problem because a perfectly sterile surface is more likely to allow the
growth of the "bad" bacteria. Most naturally occurring bacteria
actually
prevent the growth of the more nasty variety.
Cheers,
Brian.
-----Original Message-----
From: Informal Science Education Network
[mailto:[log in to unmask]] On Behalf Of jeff courtman
Sent: Monday, February 20, 2006 11:52 AM
To: [log in to unmask]
Subject: Fog wall question
ISEN-ASTC-L is a service of the Association of Science-Technology
Centers
Incorporated, a worldwide network of science museums and related
institutions.
************************************************************************
*****
A while back, we had a large tank with a fog feed into it (ultra sonic
generation), 'touch a cloud'. At the time, for another exhibit, we had
an
industrial hygenist in to look at some exhibits. (cooties concern :).
His
take was the feed tubes for the fog; excellent breeding ground for bugs,
including, he claimed, things like legionnaires disease.
The answer was easy; clean the tubs with a mild bleach solution every
couple
of days.
This is a much different scale, and something I would guess the company
has
addressed. My comments are fyi.
Jeff Courtman
Exhibits & Special Projects Coordinator
251.208.6851
Exploreum Science Center
www.exploreum.net
-----Original Message-----
From: Informal Science Education Network
[mailto:[log in to unmask]] On Behalf Of Lath Carlson
Sent: Monday, February 20, 2006 9:36 AM
To: [log in to unmask]
Subject: Re: Fog wall
ISEN-ASTC-L is a service of the Association of Science-Technology
Centers
Incorporated, a worldwide network of science museums and related
institutions.
************************************************************************
****
*
We just had a Fogscreen, www.fogscreen.com , in our shop for evaluation
the
other week. It was very cool. Setup was pretty easy, but for permanent
installations you will need a water supply. The system does use
ultrasonic
humidifiers to create the "fog" and no matter what anyone says that
means
that their will be some condensation. For that reason I would recommend
putting in a flooring/drain system under the screen that will keep this
from
being a problem. That being said, the fog does feel dry to the touch.
Interestingly this system is rear projection and a different image can
be
projected from each side. We tested it with a 3500 Lumen projector under
regular lighting conditions and dim light conditions. Under dim light it
was
pretty amazing and under regular lighting it was still impressive. They
recommend a 4000-5000 lumen projector. We found that having a darker
colored, uncluttered background also helped. We found graphics with high
contrast to display better then video with low contrast, even text
bigger
then 1" was readable. The screen size is about 7' x 5' and it is very
cool
to be able to walk though the screen and have the image flow around you.
We
will be doing the biggest Fogscreen install to date at the E3 video game
show in LA in May. They are a Finnish company and we have been dealing
with
their US rep Brian Forth, who has been very responsive. The screen we
demo'ed is being installed at the Museum of Water in NYC. I can give you
a
contact there if you are interested. Let me know if you have any other
questions.
Lath Carlson
Manager of Interactive Technology
Art Guild Inc.
300 Wolf Drive
Thorofare, NJ 08086
Mobile: 215-768-9322
Email: [log in to unmask]
www.artguildinc.com
-----Original Message-----
From: Informal Science Education Network
[mailto:[log in to unmask]] On Behalf Of Eric Siegel
Sent: Friday, February 17, 2006 5:26 PM
To: [log in to unmask]
Subject: Re: Fog wall
ISEN-ASTC-L is a service of the Association of Science-Technology
Centers
Incorporated, a worldwide network of science museums and related
institutions.
************************************************************************
*****
I saw a great version of this at Siggraph last year.
http://rocky-mountain.siggraph.org/sigweb2/pages/%20etech%20fog%
20wall.htm
Eric Siegel
New York Hall of Science
[log in to unmask]
(718) 699-0005 x 317
On Feb 17, 2006, at 5:20 PM, Scott A Perich wrote:
> ISEN-ASTC-L is a service of the Association of Science-Technology
> Centers
> Incorporated, a worldwide network of science museums and related
> institutions.
> **********************************************************************
> *******
>
> Any recommendations, concerns or advise regarding projected images
> on fog
> walls? What about maintenance and dependabilty?
>
> Just curious...
> Scott
>
> **********************************************************************
> *
> More information about the Informal Science Education Network and the
> Association of Science-Technology Centers may be found at http://
> www.astc.org.
> To remove your e-mail address from the ISEN-ASTC-L list, send the
> message SIGNOFF ISEN-ASTC-L in the BODY of a message to
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More information about the Informal Science Education Network and the
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Association of Science-Technology Centers may be found at
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To remove your e-mail address from the ISEN-ASTC-L list, send the
message SIGNOFF ISEN-ASTC-L in the BODY of a message to
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***********************************************************************
More information about the Informal Science Education Network and the
Association of Science-Technology Centers may be found at http://www.astc.org.
To remove your e-mail address from the ISEN-ASTC-L list, send the
message SIGNOFF ISEN-ASTC-L in the BODY of a message to
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