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).
The NASA astronauts will install cables and outfit the docking port that will enable future Boeing and SpaceX crew vehicles to dock at the International Space Station. While the spacewalk preparations were under way, a Japanese astronaut and three cosmonauts conducted a variety of space research.