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1st order is 28 hz, 2nd at 56, 3rd at 84 hz Now see if you can work out 4th order

Josh - he said the Chinese use of Uighur slave labor to build solar panels is justified because China's human right's record is better than the USA's.

Well if it is going to work (bearing in mind there are zero CCS units operating successfully at scale across the globe) then yes it'll need engineers to design it and debug it, at least until taxpayer's money runs out. Of the three I'd skip Systems. It's a great masters (depending on...

Energy 'density' of sound is very low. 94 dB is quite loud and is a flux of 1W /m2, and your microphone/loudspeaker is not very efficient.

It doesn't really work for 3d it has no way of understanding two superimposed beams in a given view on a plane.

as title Here's a nice article on them https://www.acsa-arch.org/proceedings/Annual%20Meeting%20Proceedings/ACSA.AM.84/ACSA.AM.84.1.pdf

Well, as demonstrated much of the rise comes from 'adjustments' to the physical readings. The same sort of adjustment is done for other temperature series. For instance here's a comparison between the previous version of HadCrut4 and the current version, HadCrut5 Magically they get 20% more...

Meanwhile our flagship little green grid is currently running this, King Island is supposed to be 65% renewable, on average, not a number that's easy to test. Note the useless battery...

That's the nice thing about the satellite measurements (well no, they are a model as well). Suddenly them as control the data can't warm the surface temperature in the present so have to resort to cooling the past. Handily in Australia the corrections create a 1.5 cooling in the pre industrial...

Not in the steady state, it just affects the rate at which the butterfly can move. Hang on, bear in mind I've never seen one of these things, I'm just working from first principles.

So in reality it adds a tiny bit of security, in that deploying the virus now takes an extra step.

Hmm, I wonder if next year when the temperature drops we'll see the same organisations announcing that of course it is just variability.

1689 rpm is 28.15 Hz. You may have some 2nd order at twice that Something doesn't add up, you'd expect to see at least some content at tooth mesh frequency.

No, I think it controls the butterfly's position as the primary function. The needle valve probably acts to damp that motion.

Not without a much better description of the gearbox, input rpm, number of teeth on each gear etc.

updated the code above with a less inaccurate legend (0.1, not 0.125)

Please could we have .m files - Matlab and Octave, and .sci and .sce for Scilab (not that that gets used much)

et voila, probably got mistakes, haven't done this for years, no hanning or corrections %spectrum271828 %Greg Locock %29 Dec 2025 %v .1 %To do %Dependencies %none %Changelog clc; clear; close all %make a time signal t = 0:.125:10; x = sin(2.1*pi*2*t) + 2*sin(2*pi*2.35*t); %plot it and...

That means the energy in each bin is NOT a PSD, you can just add the squares up, and square root the sum. This of course will make your peak higher, but the energy of the total signal stays the same.

You are of course aware that the 1.5 target is a meaningless number in scientific terms. Why not 1.4? 1.6? -6? 0? 1 ? 2 ? 3? 10? As this rather nice chart with a weird x axis points out mammals even without electricity have survived and prospered through a wide range of temperatures. And just...