act-r aaron sloman agent architecture allen newell artificial brain artificial consciousness artificial intelligence atomism autonomous agent bamberg behaviorism biologically-inspired computing boicho kokinov brunel university carnegie mellon university cognitive model cognitive science complex system complexity computation computational connectionism douglas hofstadter dynamical system emergence germany holism hybrid intelligent system information processing language intelligent agent intelligent system knowledge representation learning marvin minsky melanie mitchell memristor motivation nasa ames research center neural network new bulgarian university parameter pennsylvania state university perception problem solving procedural reasoning system production system psi-theory r-cast reaction time rensselaer polytechnic institute robot robotic paradigms robustness rodney brooks ron sun sri international simulated reality social simulation stan franklin strong ai subsumption architecture symbolism top-down and bottom-up design unified theory of cognition university of hertfordshire university of memphis university of michigan virtual machine