Toepassingen voor het gebruik van de 3D accellerometer in iPod Touch, iPhone:
Zie: layar.com
Enkele artikelen over de Apple/Nike aanpak, onder andere over van het meten van snelheid en afstand:
http://www.wired.com/medtech/health/magazine/17-07/lbnp_nike?currentPage=all
Citaat:
The basic science that allowed Nike and Apple to capture this information is low tech, introduced in a 40-year-old study published by biomechanical researcher Richard Nelson at Penn State. Nelson filmed a mix of 16 freshman and varsity athletes at the university running at various speeds, on smooth and sloped surfaces. What he found was both simple and powerful—the amount of time a runner's foot is in contact with the ground is inversely proportional to how fast he's running and unaffected by slope or stride length. That means if you know how long that contact lasts, you can make a pretty good guess as to how fast the runner is going.
"People in biomechanics knew about this, but they felt it wasn't good enough for the lab, because it's accurate to plus or minus 5 percent," says Mario Lafortune, director of Nike's Sport Research Lab. "But for an application like Nike+ it's tremendously accurate."
(Zie de bijlage met het originele rapport van Nelson.)
De technologie wordt uitgekleed in het artikel:
http://www.sparkfun.com/commerce/tutorial_info.php?tutorials_id=41&page=
Voor een ander artikel, dat ook verwijst naar de verschillende aspecten van motivatie: