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--- coursework:2014f:ray_tom [2014/09/30 04:19] – csymonds
+++ coursework:2014f:ray_tom [2014/10/07 02:35] (current) – csymonds
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 ====== Dr. Thomas S. Ray ======
-“My current research: The diverse set of psychoactive drugs collectively represents a rich set of tools for probing the chemical architecture of the human mind.”
 {{:coursework:2014f:tom100604ac.jpg?nolink &200|}}
@@ Line 8: / Line 7: @@
 ===Timeline===
--1990: Biology\\
+-1990: Rainforest Biology\\
-   * Skototropism (Growth towards darknes) a tropical vine Monstera gigantea does not engage in random search, but rather finds a suitable tree host by growing towards the darkest sector of the horizon.
+   * Skototropism (Growth towards darkness) a tropical vine Monstera gigantea does not engage in random search, but rather finds a suitable tree host by growing towards the darkest sector of the horizon.
    * Antbutterflies: Butterflies that follow army ants to feed on antbird droppings.
    * Diversity
@@ Line 15: / Line 14: @@
    * Heterophylly (morphology induced by environmental conditions)
-Became interested in the concept of reproducing biological evolution in the computer from a "Mysterious teacher over a game of Go" but knew nothing of computers.
+In grad school around 1978, became interested in the concept of reproducing biological evolution in the computer by a "Mysterious teacher over a game of Go" but knew nothing of computers.
 Familiarized himself with computers after purchasing his first laptop and debugger in 1988. Reached out to Chris Langton in 1989 and was invited to visit the Artificial Life group at the Los Alamos National Laboratories and the Santa Fe Institute where he met Chris Langton, Steen Rasmussen, and Stephanie Forrest among others. All but Rasmussen were skeptical of Ray's plan.
@@ Line 22: / Line 21: @@
 The problem: computer languages are too fragile or "brittle". Mutate the code, and the whole thing dies.
-Determined to succeed, Ray turns his back on 15 years of biology research and tenure at the University of Delaware to build
+Determined to succeed, Ray left behind 15 years of biology research to model biological evolution in a digital world.
-: Tierra is born
+===1990: Tierra is born===
-   *The instruction set of the CPU, the memory, and the operating system together define the complete ``physics and chemistry'' of the universe inhabited by the digital organism.
+   * The instruction set of the CPU, the memory, and the operating system together define the complete "physics and chemistry" of the universe inhabited by the digital organism.
-   *
+   * The machine language defined by the CPU constitutes the genetic language of the digital organism.
-: Transition to Computational Evolution
+But how do we handle the "brittleness" of machine code?
+   * Graceful error-handling
+     * CPU should ignore/skip meaningless code
+Tierra is a "virtual computer"; a simulation of a computer designed to run the "Tierran" machine language. Ray conducted the first test of this virtual computer with a simple test program. "All hell broke loose".
+Parasite/Host creatures emerged. Parasites replicated from the critical data produced by the host creatures which gave rise to a Lotka-Volterra cycle in which the populations oscillate back and forth. (Sharks and fish)
+This led to an evolutionary arms race.
+Eventually the host organisms learned to trick the parasites into making copies of the host instead of themselves. This led to the total extinction of the parasite creatures.
+The hosts became the only creature in the "world" and slowly started evolving cooperative mechanisms. A social structure emerged. Until finally trusted programs began to "cheat" using the same deceptive tricks the host originally used to overcome the parasites.
+At this point, Ray turned off mutation, however the digital organisms continued to evolve. Ray eventually discovered that the organisms had discovered "sexual reproduction" and were reproducing with each other, creating offspring that were mutated combinations of the parents. Ray was no longer in control of the process.
+"I stood back and watched like a god satisfied with his creation"
+===Exploring A New World===
+Over 30 papers, articles, and journals were published in the span of 5 years. The next 20 years of research is spent pushing the field of artificial life and digital evolution. Highlights include:
+: Transition to Computational Evolution and Documenting Tierra
    * Genetic Algorithms
    * Evolution and optimization of digital organisms
    * Population dynamics of digital organisms
    * An approach to the synthesis of life
+   * Evolution, ecology and optimization of digital organisms
+   * How I created life in a virtual universe
+   * An Evolutionary Approach to Synthetic Biology: Zen in the Art of Creating Life.
+   * A proposal to create a network-wide biodiversity reserve for digital organisms.
+   * The first Tierra workshop - derivative works (Charles Ofria, Avida)
-Critique of Ray Kurzweil's Age of Spiritual Machines
+   * The last Terria workshop?
-Ray: "Kurzweil does not understand that it is the act of measurement that causes the collapse of the wave function, not conscious observation of the measurement."
+   * Evolving Parallel Computation
+   * Evolution as Artist (applying evolution to the world of art and the creative process)
-Kurzweil: "It is only through the collapse of the wave function that an event becomes determinate and thereby causes a reaction in the world, which constitutes a measurement. It is, therefore, the collapse of the wave function that causes measurement, which Ray tells us causes collapse of the wave function. So what Ray is saying is that the collapse of the wave function causes the collapse of the wave function. By removing the concept of observation from measurement, Ray’s explanation of quantum mechanics devolves into this tautology."
+   * Documentation of the Tierra program released
-{{ :coursework:2014f:vizzini.jpg?nolink |Truly, Kurzweil has a dizzying intellect}}
+   * Aesthetically Evolved Virtual Pets
+   * Evolution of Complexity: Tissue Differentiation in Network Tierra
+   * Critique of Ray Kurzweil's Age of Spiritual Machines
-An Evolutionary Approach to Synthetic Biology: Zen in the Art of Creating Life.
 -5
-Evolution, Robustness and Adaptation of Sidewinding Locomotion of Simulated Snake-like Robot
+   * Evolution, Robustness and Adaptation of Sidewinding Locomotion of Simulated Snake-like Robot
 (Last* Artificial Life publication):
 Artificial Life Programs and Evolution. In: Michael Ruse and Joseph Travis editors, Companion to Evolution. Cambridge, Mass.: Harvard University Press. Pp. 429-433. Published Feb 12, 2009, Darwin's 200th birthday
+===Current Research===
+“My current research: The diverse set of psychoactive drugs collectively represents a rich set of tools for probing the chemical architecture of the human mind.”
 First Mind research publication:
@@ Line 60: / Line 99: @@
 "It should be possible to use this diverse set of drugs as probes into the roles played by the various receptor systems in the human mind."
-===Mind Reseearch===
+   * Mental Organs and the Origins of Mind
+Mind Research:
    * The human mind is populated by mental organs
@@ Line 73: / Line 115: @@
 and thus provide the mechanisms by which evolution sculpts the mind.
+   * Future minds, mental organs and ways of knowing.
+     * Technoetic Arts: A Journal of Speculative Research
@@ Line 81: / Line 127: @@
 [[http://life.ou.edu/tierra/|Tierra Project Homepage]]
+[[https://www.youtube.com/watch?v=Wl5rRGVD0QI|Tierra Project Movie (YouTube | 22:37) 1995 - With Stephanie Forrest]]