On page 12 of the Lulu scan, the author discusses the relation of his book to "Calculus: Early Transcendentals" and explains that he is attempting to provide an alternate which exactly follows the topics and formats of the original so that students can us it as a less-costly substitute. I didn't go beyond that so maybe it's a scan, but the author does address the issue.

Not to go into detail, but you don't need to traverse a wave peak to peak in order to discriminate relative displacement when using phase interferometry

You bet I've read Vinge and I'm excited that I might be able to be part of whole new ways of human visualization. For a step further out, you might try Karl Schroeder, "Lady of Mazes" for a picture of the society and culture of daily life within a pervasive nanobot fog :)

I've already got a fair amount of email but if you're having trouble here it is: dennis at hivenw.com

right, I'm tracking the displacement for an initial position or pose, not the distance. This is one of the areas that confuses people on the precision that I'm getting with RF, precisely because I'm not attempting to measure the distance, just the deviation.

I've made my email address public in my profile. Sorry for the latency of the response, my comment Karma had run out.

Although this could be used "inside out" to instrument a stage, my main focus is to use it as a "wearable" that captures limb movement, so you capture that dance steps, but not the movement of the dancer relative to the stage.

Sorry for the latency of the reply. My comment Karma ran out. I looked at long lists of Angel Clubs, but when that's when my insecurities regarding the execution of of the business kicks in. I really need a business guy/partner to carry this forward. Someone that would be comfortable with this phase of the start-up. I have what I think is a solid business plan and a strong patent on a novel technology, but frankly, I'm not the business guy to carry it off.

I'd love to stay in touch. My email is public in my profile.

Ask your tech guy about the accuracy you can get from phase interferometry. I think the 3D motion guys will be very interested, since this is highly accurate, is wearable and not studio bound, and is cheap. But I'm aiming at the development of a mass market. I want this to become just a high end peripheral input device and open up broad new applications markets at the consumer level. I'd practically give the technology to the studios, just for the exposure and development.

I have been doing just as you suggested. The problem, beside our shit economy, is finding the juxtaposition of talent, interest and availability. Most have the interest, it's a pretty cool idea, but most don't have the availability or want to get involved at this very early, risky stage.

It's the occasional affirmation like this that make it easier to get through the day! Thanks.

Oddly enough, although I don't know Bunny. I'm been keeping up with him over the years. As the software architect for the xbox manufacturing software, I was deeply involved in XBox security and read, with admiration, the process of this analysis of necessary security approaches and possible weaknesses.. Since I've also spent a lot of time in the Chinese manufacturing sector, I could also sympathize with his experiences. He would be a wonderful guy to work with, but I don't think this is his kind of project. What a nice thought, though. ---- Dennis

Thanks for the thoughts. I've had to stay mum about the idea until I got the International patent applied for. Even though I had a provisional, that doesn't protect international rights if you've made a public disclosure. Now that I've finally made my domestic and international filing, I can finally talk about it and seek help in developing what is really a very naiscent technology. Hence this post.

You've made a bad assumption about how I measure phase change. It's the same approach that the wikipedia article on RF motion capture makes and comes up with the same error. The 1mm accuracy I got was using a somewhat arbitrary wavelength 0f 24 feet, 40 MHz. Accuracy, in my system, is only casually related to frequency.