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Comment by maxerickson | Hacker News Reader

As seems to be a pattern with this blog, the article is a little too similar to existing materials to not have any citations. Here the tree starts at Wikipedia, bounces through Archive.org and ends up at a Danish blog with some interesting images:

http://en.wikipedia.org/wiki/Vertical_loop

http://web.archive.org/web/20070827183113/http://fy.chalmers...

http://www.matematiksider.dk/vejgeometri.html

Nothing is taken directly from the source material though.

Edit: Just to expand a bit on calling it a pattern, this blog:

http://www.datagenetics.com/blog/september32012/index.html

uses a figure (and analysis) very reminiscent of A birthday present every eleven wallets? from here:

http://www.jbonneau.com/publications.html

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Ouch! tough crowd :)

Sorry, I don't mean to cause offence to anyone. I blog things I find interesting. I use my own words, create my own animations, derive my own formulas (and the spelling and grammar mistakes are all mine!)

When I use the photos/images from others, I give credit and link back to sources as much as I can from available data.

I've have on the order of 100 blog articles now. I'm sure over the course of these I've trodden on a few feet (sorry), just as much as I've blazed new trails.

We can all become better by listening to feedback, and I'll try to do better at providing additional sources of information and inspiration.

I think my edit snuck in at about the same time as your reply, sorry about that.

I thought it was great! One nitpick: the word "Acceleration" is mis-spelled in the first section (http://www.datagenetics.com/blog/march42014/eq0.png).

Some great blog posts there - lots to read later. I'll work out a way to give you some feedback if I have any ... :)

I’m really not sure I see your point. This is about math and physics, so I would assume anyone who writes about it writes about the same things and has similar diagrams.

Also, this is not a scientific paper. As long as words, diagrams or very specific and very novel ideas (nothing of that kind seems to be happening here) are not lifted directly I really fail to see the problem.

My math and physics textbooks in school didn’t contain any citations either.

I obviously can't prove anything, but it's seems pretty likely the danish blog about clothoids 'inspired' that section of the article. It would be polite to say so.

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