O n page 999, Holway et al. reveal that worm embryos would rather risk genomic mutation than disturb the timing of cell division. DNA damage–induced checkpoints, the group fi nds, are silenced during early embryogenesis. The need for the silencing arises because of the importance of timing in embryogenesis. At the worm’s two-cell stage, for instance, a two-min...

This paper presents a solution to the problem of the creation of new terms by suggesting that representations can come from the environment, and that through experience an agent discovers which representations are useful. If suitable feature building mechanisms are built into a system then it can build a large number of features of an object in the environment, many of which may be redundant. T...

This research examined human defensive reactivity when exposure to an aversive event could be escaped but not entirely avoided. Prolonged visual cues indicated whether exposure to an upcoming aversive (i.e., disgusting) picture could be terminated after onset (escaped) or not, or that a neutral go signal would appear. Acoustically elicited startle reflexes were measured during each cue interval...

The paper researches the fire sources and programs escaping path using mobile robots for intelligent building, and presents the movement scenario in the experimental platform. The mobile robot has the shape of cylinder and its diameter, height and weight is 10cm, 18cm and 1.5kg. The controller of the mobile robot is MCS-51 microchip, and acquires the detection signals from flame sensor and refl...