Depression may be challenging to assess in a patient with dementia. In patients with AD, the presence of depression may range from 6% to 30%, depending on the diagnostic criteria employed (Cummings et al., 1995). The prevalence and course of depression in dementia are controversial, due to several confounding factors.
Astronauts use space shuttles(trasport people and equipment), Space probes (robotic exploration, Spacecrafts (trasport crew, equipment, and other technologies).
A+E Networks. Also on this day in presidential history, Richard Nixon signs a bill authorizing $5.5 million in funding to develop a space shuttle. The space shuttle represented a giant leap forward in the technology of space travel. Designed to function more like a cost-efficient âreusableâ airplane than a one-use-only rocket-launched capsules, the shuttle afforded NASA pilots and scientists more time in space with which to conduct space-related research. NASA launched Columbia, the first space shuttle, in 1981.