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A Calculus of Number Based on Spatial Forms - University of ...

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as an undergraduate at the <strong>University</strong> <str<strong>on</strong>g>of</str<strong>on</strong>g> Illinois. Penny challenged me with<br />

interesting research problems and gave me opportunities to presentmy ndings<br />

to receptive audiences. I am forever grateful to her.<br />

I thank the students and sta <str<strong>on</strong>g>of</str<strong>on</strong>g> the Human Interface Technology Laboratory<br />

and its director, Dr. Thomas A. Furness, for providing a stimulating<br />

envir<strong>on</strong>ment for developing these ideas. I thank Kimberley Osberg, Dav Li<strong>on</strong>,<br />

and Greg Woodward in particular for their pers<strong>on</strong>al support. I thank US West<br />

for funding part <str<strong>on</strong>g>of</str<strong>on</strong>g> this research and I thank all members <str<strong>on</strong>g>of</str<strong>on</strong>g> the c<strong>on</strong>sortium<br />

for supporting the lab.<br />

Though I wrote this document at the HIT Lab in Seattle, I \polished the<br />

turd" at Interval Research inPalo Alto. I thank Dick Shoup, the Natural<br />

Computing group, and every<strong>on</strong>e at Interval for their support <str<strong>on</strong>g>of</str<strong>on</strong>g> my research.<br />

I extend my warmest appreciati<strong>on</strong> to Ann Miller, with whom I shared the<br />

joy <str<strong>on</strong>g>of</str<strong>on</strong>g> discovering many <str<strong>on</strong>g>of</str<strong>on</strong>g> the ideas herein. Ann taught mehumility and<br />

compassi<strong>on</strong> and will always be in my heart.<br />

Finally, I thank Laura Grant, the love<str<strong>on</strong>g>of</str<strong>on</strong>g>my life. I could never have nished<br />

this thesis without her intellectual and emoti<strong>on</strong>al support. Though it took a<br />

while, I nally managed to \swallow the toad!"<br />

Jerey Mark James<br />

Human Interface Technology Laboratory<br />

October 14, 1993<br />

viii

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