Re: [tGarden-dev] Turk + O'Brien: hape Transformation Using Variational Implicit Functions

[Yon V. <yo...@pr...>]

Hi XW

I'm waiting for a book on the use
of implicit functions in computer
graphics & some other items.  

Let's see.. away from my computer,
but two interesting off-the-top-of-
my-head-items follow.  Bye!

Yon

-----------------------------------

Kimber, D. and Marcia Bush
"Situated State Hidden Markov Models"
Xerox Parc, Palo Alto, 1993
http://citeseer.nj.nec.com/254069.html

Abstract: We introduce a probabilistic model called a
Situated State Hidden Markov Model (SSHMM), in which
states are `situated' (i.e. assigned positions) and
assumed to correspond to regions of an underlying
continuous state space. Transition probabilities among
states are induced by the assigned state positions in
such a way that transitions occur more frequently
between nearby states. The model is formally defined,
and a maximum likelihood estimation procedure is
described. Experiments on synthetic data are described
and demonstrate that SHMM's can learn the structure of
an underlying continuous state space even when observed
through high dimensional discontinuous functions.... 

--------------------------------

Stevens, Roger and Rok Sosic
Griffith Univ. Research Report CIT-95-14
"Emergent Behaviour in Slime Mould Environments"
http://citeseer.nj.nec.com/93380.html

Slime moulds are well studied organisms in biology.
They are some of the simplest organisms
that exhibit complex emergent behaviour. Although
individual organisms interact with the
environment only by following local rules, slime moulds
produce a collective behaviour on a
global scale. The modelling of slime mould patterns
provides a good testbed for studying
emergent behaviour.
We have simulated the behaviour of slime moulds on a
computer model. In the model, each
organism is guided by rules, derived from studies of
real organisms. By changing parameters
of the simulation, we were able to study some
underlying mechanisms behind the emergent
behaviour. We have concentrated on the strength of the
communication signal and the distance
at which the signal is effective. Results show rather
unexpected results that a stronger
communication signal does not necessary reinforce the
emergent behaviour and that the
effective signal distance does not depend on the
density of organisms.