In the fly Drosophila melanogaster, neuronal plasticity of synaptic terminals in the first optic neuropil, or lamina, depends on early visual experience within a critical period after eclosion. The current study revealed two additional and parallel mechanisms involved in this type of synaptic terminal plasticity. First, an endogenous circadian rhythm causes daily oscillations in the volume of p...

The proposition was tested that depressives make predictions about the future based on a pessimistic future-event schema. Participants varying in depression predicted whether positive and negative events would happen to them (or to an average person) in the future by pressing yes or no at a computer terminal as quickly as possible, either under a concurrent attentional load or under no such loa...

The health of the ocular surface requires blinks of the eye to be frequent in order to provide moisture and to renew the tear film. However, blinking frequency has been shown to decrease in certain conditions such as when subjects are conducting tasks with high cognitive and visual demands. These conditions are becoming more common as people work or spend their leisure time in front of video di...

FlLMSHARE operates through two Smoke Signal 6800 microcomputers at SMP headquarters in Silver Spring, Maryland. The system makes it possible for ECF depositories in each of the seven ECF administrative regions to draw on one another's film collections for bookings they would otherwise be unable to make. Depositories may access the system with either a TTY or a computer terminal. In addition to ...

Most virtual reality (VR) systems employ head-mounted displays (HMDs). Many such systems are also designed to provide stereo depth and use head tracking to enable the virtual world to change in response to the user's movements. The current state of HMDs and other VR technology falls short of accurately simulating many aspects of the visual world. Differences between the real world, for which th...