Search found 27 matches

by jasonwalker
Tue Mar 24, 2015 8:45 pm
Forum: PyNomo
Topic: Help with Mac OS X installation
Replies: 1
Views: 6222

Re: Help with Mac OS X installation

Hi Robert, Welcome to the forum. First up, apologies - we tend to be a bit of a backwater, so it can be weeks before a post gets answered. Secondly, I'm no mac expert, but I figured that suggesting something while we're waiting for a mac expert to show up would be no harm. :-) Caveats out of the way...
by jasonwalker
Thu Jan 08, 2015 10:03 pm
Forum: Mathematics
Topic: scaling of a N/Z type nomogram
Replies: 18
Views: 18779

Re: scaling of a N/Z type nomogram

I'll admit, I haven't yet delved into your algebra - hopefully I might get a chance over the weekend...

J
by jasonwalker
Tue Jan 06, 2015 9:30 pm
Forum: Mathematics
Topic: scaling of a N/Z type nomogram
Replies: 18
Views: 18779

Re: scaling of a N/Z type nomogram

Not sure. I've tried lining the new scale up with no conversion factor - so essentially you should get the same scale on either side - but even that doesn't completely line up. :( Perhaps some of the other members may have a clue (you may have noticed, it's a slow moving forum!) I think the numbers ...
by jasonwalker
Mon Jan 05, 2015 3:29 pm
Forum: Mathematics
Topic: scaling of a N/Z type nomogram
Replies: 18
Views: 18779

Re: scaling of a N/Z type nomogram

Hello again! Gosh, you've been busy. And that's turning into a really nice nomogram. I'd suggest tidying up the scale lengths: the bottom section of the B1 scale doesn't appear to be serving much function - I'd either chop it off or extend B0. But you're the expert. :-) When it's done, I'd suggest t...
by jasonwalker
Wed Dec 31, 2014 12:47 am
Forum: Mathematics
Topic: scaling of a N/Z type nomogram
Replies: 18
Views: 18779

Re: scaling of a N/Z type nomogram

Hi William, Welcome aboard. There's a short answer and a long answer - I'm off to catch a boat, so I'll give the short one. I'll post the longer one in a few days if no-one beats me to it. There are transforming constants you can apply to your determinant, but I'd have to look them up. Abbott or Lev...
by jasonwalker
Wed Oct 08, 2014 6:48 pm
Forum: Literature
Topic: Yet another publication!
Replies: 1
Views: 10589

Yet another publication!

This one has a compound nomogram to calculate Lean Body Mass and Ideal Body Weight in overweight children. (Ideal is what you should weigh; lean is what you weigh without your fat. Overweight people often have more muscle bulk, as a result of carrying the extra weight around, so lean and ideal are d...
by jasonwalker
Wed Oct 08, 2014 6:40 pm
Forum: PyNomo
Topic: Trouble aligning scales
Replies: 4
Views: 6641

Re: Trouble aligning scales

It's been a long time coming, but the full nomogram I was working on here has finally made it into print. http://onlinelibrary.wiley.com/doi/10.1111/anae.12860/full Leif, you'll be glad to hear that you're mentioned in the acknowledgements.

Jason
by jasonwalker
Tue Jul 15, 2014 8:43 pm
Forum: Literature
Topic: More publications
Replies: 2
Views: 3787

Re: More publications

Why thank you, sir.

(Adds 'nifty' to log of accolades received.)

Sadly, neither the Burns or BJS article is free, but as they're both major journals, most institutions will have access.

Jason
by jasonwalker
Mon Jul 07, 2014 7:57 pm
Forum: Literature
Topic: More publications
Replies: 2
Views: 3787

More publications

Nomodave and I have had a number of successful publications recently in the medical literature with Pynomo-based nomograms. Unfortunately most of the are pay-for-access (you may have institutional access, depending on where you are) but this one in Anaesthesia is open access: http://onlinelibrary.wi...
by jasonwalker
Tue Dec 18, 2012 2:13 pm
Forum: Mathematics
Topic: Req: Can this eqn be expressed in Std Nomo Form?
Replies: 22
Views: 28403

Re: Req: Can this eqn be expressed in Std Nomo Form?

I've plumbed all this into Pynomo and the result is below. Glen, I've swapped the first two columns of the determinant around to make the axes vertical and I've put in the actual names of the variables. (Bit of an explanation: PaO2 is measured oxygen in your blood, FiO2 is the level of oxygen you br...
by jasonwalker
Mon Dec 17, 2012 7:28 am
Forum: Mathematics
Topic: Determinant for V = 12h³ - 6ah² + ha²
Replies: 3
Views: 5814

Re: Determinant for V = 12h³ - 6ah² + ha²

Oh bother. Thought I had it!

:)
by jasonwalker
Sun Dec 16, 2012 11:39 pm
Forum: Mathematics
Topic: Determinant for V = 12h³ - 6ah² + ha²
Replies: 3
Views: 5814

Re: Determinant for V = 12h³ - 6ah² + ha²

Not often I get to be the clever one around here.

Determinant:
0__________V_________1
1__________[6a-a²]_______1
[h/(h+1)]__[12h³/(h+1)]___1

It's a standard type 4 determinant as described by Levens, or Genus 1 as described by Alcock and Jones. The formula just translates directly across.

Jason
by jasonwalker
Sun Dec 16, 2012 10:56 pm
Forum: Mathematics
Topic: Req: Can this eqn be expressed in Std Nomo Form?
Replies: 22
Views: 28403

Re: Req: Can this eqn be expressed in Std Nomo Form?

dave, you need to check your e-mails!

:wink:
by jasonwalker
Mon Dec 10, 2012 10:50 pm
Forum: Mathematics
Topic: Req: Can this eqn be expressed in Std Nomo Form?
Replies: 22
Views: 28403

Re: Req: Can this eqn be expressed in Std Nomo Form?

Hi Glen,

Well, I've gone over the algebra, and yes, you're right (unless I too have made exactly the same mistake!) Thanks for this. Will let you know how I get on with pynomo. (Wayyy to tired tonight.)

I love curved axes, btw :D

Jason
by jasonwalker
Wed Sep 05, 2012 6:52 pm
Forum: Mathematics
Topic: Req: Can this eqn be expressed in Std Nomo Form?
Replies: 22
Views: 28403

Re: Req: Can this eqn be expressed in Std Nomo Form?

Thanks Ron.

I must give credit where it's due - that article was one of the first works I read on the topic, and I'm still learning from it.

Jason

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