Tensegrityis the pattern that results when push and pull have a win-win relationship
with each other. The pull is continuous
and the push is discontinuous. The continuous
pull
is balanced
by the discontinuous push
producing an integrity of tension –
compression.
think little of these forces. Most of us assume they are simple opposites. In and out. Back
and forth. Force directed in one direction or its opposite.
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explained that these fundamental phenomena were not opposites, but compliments
that could always be found together. He further explained that push
is divergent
while
pull is convergent.
Illustration by Christopher Rywalt
pencil. The ball would always roll away from the direction of the push, first rolling one
way then the other. Push is divergent.
Now imagine the difference, if you attach a string
to the ping pong ball with tape, and pull it toward you. No matter how other forces might
influence the ball to roll away from you, the string would always bring it to you more and
more directly. Pull is convergent.
car. When I am driving uphill, I am pulling against gravity. The trailer converges nicely
behind my car. If the trailer begins to sway, I can dampen it by increasing pull
– simply
increasing my acceleration. Now if I am driving downhill, the trailer may begin to push.
This produces a strong side to side force – divergence. My trailer will begin to sway from
side to side. Push is divergent. When the trailer begins to push us, experts advise us to
accelerate our car in order to re-establish pull. Pull is convergent. The trailer will
straighten out and we can congratulate ourselves for being good drivers. These then are
the two always co-existing fundamentals of Universe
– Push and Pull – Compression and
Tension – Repulsion and Attraction.
A more common example of atensegrity
is a child's balloon. When we examine an inflated
balloon as a system, we find that the rubber skin of the balloon continuously pulls
while
the individual molecules of air are discontinuously pushing
against the inside of the
balloon keeping it inflated. All external forces striking the external surface are
immediately and continuously distributed over the entire system. This makes the balloon
very strong. We all know how hard it is to break a good balloon with a blunt blow.
discontinuously pushing
against the continuously
pulling rubber skin of the
balloon.
continuous pull and
discontinuous push.
humankind. And few of us are aware that it is a tensegrity. It is the power of tensegrity in
each tire that protects us from failure and blowout despite high speeds and long miles.
then is any balanced system composed of two elements – a continuous pull
balanced by discontinuous push. When these two forces are in balance a stabilized
system results that is maximally
strong. The larger the system the stronger the system.
geodesic domes are themselves tensegrities:
compression and omnicontinuous tension. Tensegrity is a contraction of tensional
tension-islanded compression differentiations are visible to the observer or
not.Tensegrity geodesic spheres do what they do because they have the
properties of hydraulically or pneumatically inflated structures."2
tensegrity the stronger it is. Theoretically there is no limitation to the size of a tensegrity.
Cities could be covered with geodesic domes
materials and the degree of our technologies. As Harvard physician and scientist Donald
Ingber
explains:
Snelson's sculptures – map out the shortest paths between adjacent members (and
are therefore, by definition, arranged geodesically) Tensional forces naturally
transmit themselves over the shortest distance between two points, so the
members of a tensegrity structure are precisely positioned to best withstand
stress. For this reason, tensegrity structures offer a maximum amount of strength
R. Buckminster Fuller,
SYNERGETICS—Explorations in the Geometry of Thinking, Volumes I & II,
New York, Macmillan Publishing Co, 1975, 1979
My own search for tensegrities began in 1980. As a trained physician, my attention first
turned to the human body.
instantly which are systems of the human body. The muscle-
skeletal system
is a
tensegrity
of muscle and bone, the muscle provides continuous pull,
the bones
discontinuous push.
The forces between the bones and muscles are held in
constant balance. This forms the basis for all of our physical mobility.
is a
tensegrity of sensory neurons and motor neurons. The sensory neurons always sensing
information – continuously pulling
and the motor neurons only occasionally involved in
some motor action – discontinuously pushing.
Donald E. Ingber, The Architecture of Life, Scientific American Magazine, January 1998
However, my focus was above the cellular level. I wanted to understand how individual
organisms related to each other and again I expected that the concept of tensegrity would
help us understand.
and Humans as Energy-binders,
Space-binders, and Time-binders.
(Read Korzybski's
the energy-binders have their primary relationship with the sun. Their leaves are
continuous pulling
as they collect solar energy from the sky, but with the rotation of the
earth and changes in the weather the sun only discontinuously pushes
its radiation on to
the leaves.
is the energy-binder tensegrity.
two roles either as prey or as predator. The prey animals are continuous pulling
predators to them. While the predators are only occasionally hungry. They
discontinuously push
out seeking the occasional kill. Prey and predator must be in
balance to stabilize the ecosystem. The larger the ecosystem the more stable it is.
is the space-binder tensegrity.
Female and Male operate as a tensegrity. The female
was continuously
making herself
attractive
to pull on her male, but the male
was only occasionally interested and
discontinually pushing
towards her for attention.
through education. The two roles of humans can then be seen to be Student and Teacher. I
am continuously learning – continuously pulling
in new information, but I am only
occasionally teaching – discontinuously pushing
out information to someone else.
then is the time-binding tensegrity.
other, we can see that:
ignore
each other and form no tensegrity.
class of life have a negative relationship with each other. They
form an adversary tensegrity
where the prey is continuously at risk of being hurt
and the
predator is discontinuously hurting other.
interdependent class of life can have positive relationships with each other.
We can form a synergic tensegrity
where we are continuously being helped
and
discontinuously
helping
other.