Viewing profile — dhdc

Un-paywalled: http://archive.today/geASm

The joke is that the Nobel prize in chemistry is often awarded to non-chemists.

All first five titles in the Touhou series can only run on PC98. The sixth title is the first one to run on windows. There was also a large amount of revamp of the settings, backgr…

Kuramoto-Sivashinsky is another fun equation with biharmonic operator.

Turbulence is unsolved because Navier-Stokes is unsolved.

Can you not tell it's sarcasm?

> In 20 years Matlab will be as legacy as Fortran is now Not if MathWorks keep offering discounts to universities for putting MATLAB in the courses, gotta get those undergrads "hoo…

Which of course is brought to you by Stephen Wolfram, president, CEO and founder of Wolfram Research Inc., designer of Wolfram Language™ which is available in Wolfram Mathematica™.…

Counter example: MATLAB. Proprietory software, proprietory language, yet it remains unrivalled in control engineering, DSP, communication systems and so on. I genuinely hope that O…

In a sense, Kolmolgorov complexity and Shannon entropy can basically be considered as equivalent concepts: they both define the minimum amount of information required to fully defi…

The theorem you are looking for is Shannon's Source Coding Theorem[1]. It basically states that no encoding scheme can losslessly compress data beyond the given data's Shannon entr…

I'm afraid there really isn't any hobbiest simulators out there. A lot of these arrangements rely on the intrinsic characteristics and geometry of the MOSFETs used.

The ZVA is an vector network analyzer, not an oscilloscope. Don't get me wrong, the ZVA is still an extremely impressive piece of engineering, but not even close to what Keysight h…

> With any three things, you have harmony to humans. In math, specifically dynamical systems, a lot of interesting stuff starts appearing after some variable goes up from 2 to 3, s…

I fully agree with what you said about AC/DC, just want to point out that DC benefits superconductors as well since superconductors have critical current densities where they lose …

> But then there is the tradeoff of the popularity and availability of 12VDC devices due to RV/Boating. Which is exactly why we need to get away from those 12V old garbages asap. 1…

Since we are doing DC-DC, I'd say we go with the highest DCV we can get away with. 12V is just simply too low and the associated I^2R losses will be unacceptable.

> Not to mention that circuit breakers are harder in DC. [Citation needed]

> DC-AC-DC "sandwiches" Couldn't have said it better, I had a good laugh.

To transfer an equivalent amount of power to a given load, AC has a peak to peak voltage of about 170V compared to DC's constant 120V.

> If wikipedia is to be believed, DC is better in terms of conductor material costs and transmission losses than AC, at least for long distance high-power high-voltage transmission…

Ignoring impedance and assuming the microwave oven is rated at 1kW. 1kilowatt = 60dBm. A typical WiFi receivers works fine at -60dBm = 1 nanowatt. 60-(-60)=120dB, or 12 orders of m…

Oscilloscopes often pick up some small voltage at 60Hz when the probe isn't connected to anything, and that voltage increases when a human touches the probe by acting as an antenna…