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BACKGROUND Circadian clocks are biological oscillators that regulate molecular, physiological, and behavioral rhythms in a wide variety of organisms. While behavioral rhythms are typically monitored over many cycles, a similar approach to molecular rhythms was not possible until recently; the advent of real-time analysis using transgenic reporters now(More)
into the program, which would result in familiar structures, we provided the algorithm with a model of the physical reality and a purely utilitarian fitness function, thus supplying measures of feasibility and functionality. In this way the evolutionary process runs in an environment that has not been unnecessarily constrained. We added, however, a(More)
The difficulties associated with designing, building, and controlling robots have led their development to a stasis: Applications are limited mostly to repetitive tasks with predefined behavior. Over the last few years we have been trying to address this challenge through an alternative approach: Rather than trying to control an existing machine or create a(More)
vii Acknowledgments Elizabeth Sklar collaborated on the work on coevolving behavior with live creatures (chapter 3). Hugues Juillé collaborated with the Tron GP architecture (section 3.3.3) and the novelty engine (section 3.3.7). Louis Lapat collaborated on EvoCAD (section 2.9). Thanks to Jordan Pollack for the continuing support and for being there when it(More)
Creating artificial life forms through evolutionary robotics faces a "chicken and egg" problem: Learning to control a complex body is dominated by problems specific to its sensors and effectors, while building a body that is controllable assumes the pre-existence of a brain. The idea of coevolution of bodies and brains is becoming popular, but little work(More)
Circadian clocks are influenced by social interactions in a variety of species, but little is known about the sensory mechanisms underlying these effects. We investigated whether social cues could reset circadian rhythms in Drosophila melanogaster by addressing two questions: Is there a social influence on circadian timing? If so, then how is that influence(More)
The \Spirit of Bolivia" is a robotic soccer team which demonstrates minimally comprehensive team behavior. By this we mean that each member of the team makes progress towards team goals, and obstructs progress of the opponent, by interacting constructively with teammates and in a sportsmanlike manner with opposing players. This complex behavior is achieved(More)