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).
Such a program is one of the most important technologies of future space exploration. In previous space missions, even in manned space flight to a large extent, all decisions were made by people on Earth at Mission Control and radioed up to the spacecraft.