If you have rheumatoid arthritis symptoms, tai chi exercises are a great way to stay physically active while improving mobility and balance. Find out why tai chi is so beneficial and try movements specially selected for people with RA... During a flare-up of rheumatoid arthritis symptoms, pain and fatigue make exercise the last thing you want to do.
This is a chronological list of spaceflights to the International Space Station (ISS), including long-term ISS crew, short term visitors, and mixed human/cargo missions. Unmanned visiting spacecraft are excluded (see List of unmanned spaceflights to the ISS for details). ISS crew members are listed in bold. Time docked refers to the spacecraft and does not always correspond to the crew.
The ISS has two, what might be called, networks. The mission critical network includes the computers and hardware that controls the ISS - communication equipment, Command and Control computers, PCS laptops that the crew uses to send command and look at data, controllers for heaters, radiators, solar panels, and so forth. This network uses the MIL-STD-1553 protocol and connections. This a very reliable but slow protocol that is used for controlling aircraft and missiles, among other equipment. The other network on the ISS is used for email, documents, mission timelines and so forth. I'm not as familiar with this network but I believe it uses the standard Ethernet protocols and connections. I think there is Wi-Fi as well.