Someone had posted a stripped down version of this,
but I found the full version and was totally intrigued
with the idea of controlled cavitation;
http://www.discover.com/science_news/gthere.html?article=envirscience.html#paper
....Focused blasts of sound may be the key to saving
trees and reducing the flow of garbage. Sameer
Madanshetty, a mechanical engineer at Kansas State
University, has come up with another way.
He has devised a recycling procedure that dispenses
with chemicals entirely; it also does so little damage
to the paper fibers that pages can be reused multiple
times. And all he needs to do it is some water and
precisely controlled pulses of sound.
As a sound wave travels, it creates a ripple of
expansion and compression: a low-pressure pulse
followed by a high pressure pulse, and so on. Tiny
bubbles that can sometimes form in water and other
liquids react to this change in pressure. The low
pressure pulse expands the bubbles and the high
pressure pulse makes them contract.
With certain sound waves, the contraction caused by
the high pressure part of the sound wave can be strong
and fast enough to make the bubble collapse in on
itself, creating a surprisingly large concentration of
energy.
Called cavitation, this process is powerful enough
that it can damage things like ship propellers and
water pipes, eventually eroding them away. Engineers
therefore usually try to create cavitation-proof
designs, but this goal is hampered by the
unpredictable nature of cavitation.
Madanshetty has found a way to control when and where
cavitation will occur. Along with a strong sound pulse
that causes the bubbles to expand and contract, he
uses a weaker background sound wave that destabilizes
the bubbles so that they collapse at a lower pressure;
the result is that they release less energy and their
effect is more localized.
When a piece of paper is placed in water, tiny bubbles
are most likely to form around the inked parts of the
page, because the ink repels water. Madanshetty's
sound system blasts these microbubbles; when they
collapse, they literally explode the ink off the page.
"It's like micro-jackhammers," he explains. "It
chisels away the ink and throws it up." The process
can strip the ink from a page in a few seconds, and
the ink particles can then be filtered out of the
water.
Although the bubbles have enough energy to destroy the
ink, Madanshetty's control process keeps them weak
enough that they do not seriously damage the paper
fibers below. In most cases, the paper need not be
mashed up to be recycled--the microbubbles erase the
ink effectively enough that the original paper is as
good as new, Madanshetty says.
"Present practice mechanically pulps the paper, and in
the churning process they damage the paper fibers, so
it limits the recycleability to three times," he
notes. "In this case, you are not touching the paper
fibers at all, so the number of times you can recycle
the paper would be endless."
----------------------------
This technique using;
'a strong sound pulse that causes the bubbles to
expand and contract,'
then, 'he uses a weaker background sound wave that
destabilizes the bubbles so that they collapse at a
lower pressure;'
with 'the result is that they release less energy and
their effect is more localized.'
So the bubbles 'breathe' under the influence of the
sound, expanding to create more of a 'hole', then
contracting to store pressure, then are subjected to
a weaker background wave that causes the bubbles to
collapse to fall or expand into the lower pressure.
This is strikingly analogous to what some of us think
about aether/zpe...that it is high pressure and flows
into lesser energy dense regions of space, to
precipitate as matter and even other energies.
There have been sci-fi and metaphysical writings that
refer to creating a shield that would prevent the flow
of gravity or aether into a mass, thereby making it
buoyant in a sea of pressure and causing it to repel
from the earth at high velocity.
Much like a ball filled with air and dragged down into
the water, it seeks its own density level and tries
its best to reach the surface.
=====
=================================
Please respond to jdecker@keelynet.com
as I am writing from my work email of
jwdatwork@yahoo.com.........thanks!
=================================
__________________________________________________
Do You Yahoo!?
Bid and sell for free at http://auctions.yahoo.com
-------------------------------------------------------------
To leave this list, email <listserver@keelynet.com>
with the body text: leave Interact
list archives and on line subscription forms are at
http://keelynet.com/interact/
-------------------------------------------------------------