Search found 67 matches

by Glen
Fri Feb 01, 2008 2:20 am
Forum: Mathematics
Topic: Two straight scales with a weird curvy scale in the middle
Replies: 9
Views: 22466

[quote="Leif"]If I understand correctly, this is close to a term "rectification of curves" that is discussed e.g. in Ref. [p. 180, Levens, 2nd Ed, 1965]. The question is how one can make log(f(x))-log(g(y)) plots where all curves g(z)=const are straight lines. Sometimes this does...
by Glen
Thu Jan 31, 2008 3:21 am
Forum: Mathematics
Topic: Improving a weird curvy nomogram
Replies: 0
Views: 7853

Improving a weird curvy nomogram

Some more on hand-construction... Let's imagine you have a nomogram with one curvy scale like I just described. The curvy scale is as good as you can make it (or you need to go back and redo the first stage). How can you make it a little better? Easy - you can curve one of the other two scales. We h...
by Glen
Thu Jan 31, 2008 3:08 am
Forum: Mathematics
Topic: Two straight scales with a weird curvy scale in the middle
Replies: 9
Views: 22466

Two straight scales with a weird curvy scale in the middle

If you look at enough nomograms, you'll soon see some that have a pair of straight scales and a sort of curved scale in the middle. There are some "standard" nomograms that do this - see Winchell's page http://www.projectrho.com/nomogram/standardForms.html and scroll down to "GENUS I&...
by Glen
Thu Jan 31, 2008 2:21 am
Forum: Mathematics
Topic: Shared scales
Replies: 1
Views: 6951

Shared scales

This is a little, possibly obvious lesson that took me a surprisingly long time to learn. It's one of those things that for me was obvious in retrospect, but just took me ages to get there. Context: It was while playing around with the rocketry equation u/v = exp(w/z)-1 for Ken that I bumped my head...
by Glen
Sat Jan 26, 2008 9:36 pm
Forum: Mathematics
Topic: Multiple scales on one curve
Replies: 3
Views: 9687

Multiple scales on one curve

In the Literature section, Leif pointed to a series of online articles (blogposts seems too lame a word for these glittering gems) by Ron Doerfler. The third of them: [url]http://myreckonings.com/wordpress/2008/01/09/the-art-of-nomography-iii-transformations/[/url] says the following: [quote]There a...
by Glen
Fri Jan 25, 2008 10:32 pm
Forum: Literature
Topic: Best books on nomography ?
Replies: 12
Views: 46357

Leif wrote:Recently I found a blog article about nomography:
http://myreckonings.com/wordpress/2008/ ... ic-design/


I hadn't seen that one before. Thanks.
by Glen
Fri Jan 25, 2008 5:12 am
Forum: Literature
Topic: Best books on nomography ?
Replies: 12
Views: 46357

I'm interested about nomography books. I have bought quite many of them, but many of them are not very mathematical and most of them discusses same topics. I only own a couple (of which I can only find one at present), but I have read several more. Most of them indeed discuss the same topics, and a...

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