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HTV-1 is grappled using Canadarm2

	Monitoring the approach of the Japanese cargo spacecraft from inside the Destiny laboratory

WEAR has a partially see-through video screen positioned in front of the eyes – it is worn on your head – which is voice-operated. We can see information on the screen that's relevant to the task we are carrying out, with video, images and text. Because the screen is see-through we can still see the real world around us. Here in space, we can use the WEAR system to consult procedures and handbooks, keeping our hands free to work on complex equipment.
 
 

Testing WEAR before my spaceflight together with André Kuipers

Sensors, combined with object recognition, enable WEAR to determine the exact location and orientation of the astronaut so that contextual information can be displayed. Other possibilities of WEAR include recording audio and video notes; it also incorporates barcode reading technology.

I tested WEAR on the ground before my spaceflight, but this was the first test of the technology in space. WEAR also has earthly applications, such as in architecture.
 
 

	Together with Nicole Stott at the Canadarm2 workstation in Destiny

Another interesting activity is the SOLO, or Sodium Loading in Microgravity, experiment in the field of human physiology. This is looking at whether there is a connection between the intake of salt and the breakdown of bone in microgravity. Is seems strange, but there are indications that such a link does actually exist. The reduction in bone mass in astronauts during a long-duration space mission is an extremely complex phenomenon that is possibly influenced by our diet here in space.

For the SOLO experiment I am eating specially prepared meals some of which are very low in salt and others that have a very high salt content (compared to the normal diet on the ISS). For this experiment I also have to regularly measure my mass and take urine and blood samples, these are frozen and will later be taken down to Earth for analysis in the lab.