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congratulations

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hello to mark

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uh

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matiozo i'm not sure if i'm saying that

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right

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but

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he's 22 years old and from lausanne

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switzerland

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thanks for your question he says hello

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could you describe one of the

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experiments you performed on orbit and

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what were the results

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you know

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there's so many things

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going on up here and they're at

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different stages and um

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doing several fluids experiments um uh

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some

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medical experiments earth observation

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experiments there's some experiments

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running outside for

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solar observations and uh material

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exposure to radiation and vacuum

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um did actually a

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cognitive perception

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experiment see how our brain behaves in

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this zero gravity or something else

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that's looking at

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um

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sort of like a star trek tricorder

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really it's been able to analyze

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samples on the spot

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using a portable device rather than

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having to take some samples of surface

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samples or air samples or whatever and

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bring them down to earth to study later

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being able to analyze uh composition of

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something on the spot is going to be a

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really important capability for the

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future

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well though there's so many but let me

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pick one to tell you about that i'm

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working on now

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it's a fluids experiment and the

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japanese module will be the first

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main experiment there

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and

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it's called mace

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and what it is it's looking at

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what's called a fluid bridge

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so this is a fundamental fluid physics

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experiment but it also has amazing

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applications

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basically looking at a chunk of fluid

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and the fluid is going to sitting

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between two metal cylinders so it's a

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it's a cylinder shaped

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bit of fluid and it's pretty big so you

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know

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it's not something you could do on the

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ground because it would just collapse

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up here it can flow to the relatively

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large piece large segment of fluid

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and there's going to be heating between

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the two plates and

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up here the the surface tension

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is very dominant effect in the fluid so

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you know let's gravity is not a factor

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and with heating between these plates uh

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there's going to be a fluid flow that's

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also

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carried by the surface tension so it's a

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very fundamental physics experiment but

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it's looking at

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how fluid

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with the driving force and

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and with surface tension as the

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mechanism for a flow

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now why is this important um you know

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for

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fundamental physics uh reasons there's

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interesting things to understand there

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but um and i'm not the specialist in

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this area but one of the really neat

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things about this is that you know we

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have a lot of things on the ground and

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in space that depend on pumps and

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systems that have electronics and

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sensors and

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motors to make fluids move around for

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cooling

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for

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and you know pumps pumps can fail and

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things with parts can fail

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and um uh this is this um experiment has

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some possible applications for looking

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at how fluids can move or be forced to

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move just because of a temperature

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difference

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and

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so we have

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temperature differences up here very

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large temperature differences from

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inside outside from

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day to night shadow and

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sunlight huge temperature differences

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and it's possible to generate flows of

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fluids just because of these temperature

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differences

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you can imagine a cooling system that

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works on a space station for a mission

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to mars for example with no moving parts

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all it would have is

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tubes and by exposing these tubes to

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heating and cooling

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you would have the ability to generate a

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continuous flow without any power in any

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motor so anyway this is one of the

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possible applications for understanding

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these mechanisms better so that's a

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pretty neat experiment we're just

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getting started set up all the apparatus