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).
Aboard the Shuttle. Dennis Jenkins. Events affecting the choice of computer systems for the emerging Space Shuttle can be traced back to the Apollo era. Before the first piloted Apollo flight, NASA was working on defining an orbiting laboratory ultimately known as Skylab.