We examined records of minute-by-minute computer activity coupled with information about the location of the activity, online calendar appointments, and e-mail activity. We present a number of visualizations of the data that exhibit meaningful patterns in users ’ activities. We demonstrate how the patterns vary between individuals and within individuals according to time of day, location, and day of the week. Some patterns augment the schedule information found in people’s online calendars. We discuss applications for group coordination (especially across time zones) plus opportunities for future research. In light of the popularity of instant messaging, this research identifies some of the benefits and privacy risks associated with the uses of online presence and awareness information.

This paper summarises some results from the author's work on the evolutionary engineering of electronics in general, with the intention of showing its relevance to the Evolutionary Robotics (ER) enterprise. In the next section, I describe the technology making the direct evolution of electronics possible. The later sections then consider the three points above in turn, showing experimental results. Only an overview is given --- see the references for full details. Finally, the implications for ER are summarised. 2 Technology: Evolvable Hardware

Recent experiments in evolutionary electronics have shown how artificial evolution can craft extremely efficient electronic circuits by manipulating a real physical silicon medium. Each individual circuit is physically instantiated in a reconfigurable chip (FPGA) for its fitness evaluation, so evolution can exploit all of the natural physical properties exhibited by the electronic medium, resulting in circuits well tailored to it. This can only be done properly by rigorously rejecting conventional design methods. Artificial evolution is then faced with a similar problem to that encountered in nature: how to construct a system from processes which all vary with temperature, such that the system can perform adequately over a wide range of temperatures? It is beneficial to do this in a more natural way than simply forbidding all analogue continuous-time dynamics, as conventional digital design does. Engineering proposals are formulated by analysing the correspondences between nature and e...

Abstract. Non-commutative diagrams, where X → Y → Z is allowed and X → Z → Y is not, may equally well apply to Malusian experiments with photons traversing polarizers, and to sequences of elementary chemical reactions. This is why non-commutative probabilistic, logical, and dynamical structures necessarily occur in chemical or biological dynamics. We discuss several explicit examples of such systems and propose an exactly solvable nonlinear toy model of a “brain–heart” system. The model involves non-Kolmogorovian probability calculus and soliton kinetic equations integrable by Darboux transformations.