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).
Within months of its creation, NASA began to conduct space missions, and over the last 50 years has undertaken spectacular programs in human spaceflight, robotic spaceflight, and aeronautics research. NASA today carries on the nationâs long tradition of exploration dating back at least to Lewis and Clark.