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...can I make something to correct this...
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If you're wanting something that helps the model NOT move, then something for her to rest against where she gets a tacticle response (she FEELS it) when she moves. With her hand stuck up in the air like that in an unnatural pose, she's got nothing to help her hold still.
My other comment would be about the overall exposure - were you happy with it? She's exposed well, but the background looks, to me, a bit dark in the area of the buidlings and too light in the area of the sky (and there's a whole bunch of empty sky up there - was that intentional?).
The other guys have given you some examples of things you could do... here's my $.02:
[*]Figure out your base expsoure - I'd aim for a shorter expsoure with a widet aperture to lessen the possibility of movement of the subject. Nail that exposure first, then...[*]Start off with the strobe turned down as far as you can and bring it up in very small increments until you've gotten the expsoure(s) you want[/list]
You might also move so that you've got more lights and lit things in the background... a bit higher camera angle would lessen the blank sky and still get all that lovely young lady in the shot.
Hang in there and keep trying!