maho

13 ms·

61.
by maho 11y ago
Emmy Noether.
62.
by maho 11y ago
It seems almost unbelievable how such a stern, concrete warning can be ignored. Of course, we look at this memo with perfect 20/20 hindsight, knowing that the O-ring issue caused a disaster. I am genuinely curious why the warning was i
63.
The Norm Chronicles: Stories and Numbers About Danger(thenormchronicles.com)
2 points by maho 11y ago|0 comments
64.
by maho 11y ago
I love the Feynman lectures! But sadly, they are not searchable with google [1], and I don't see a search box on the site. There is a table of contents, but no index. Is that a deliberate omission to create more value for buyers of a
65.
by maho 11y ago
> Yikes! This is brilliant innovation, but it should come with a pretty serious warning somewhere about the potential dangers of medical ultrasound. While the jury is still out about a lot of things, there are major reasons why the NHS i
66.
by maho 11y ago
In those cases, the keyboard could pop up. For most instructions, you don't need the keyboard.
67.
by maho 11y ago
Interstellar gas/dust forming a planet increases its temperature, and it radiates thermal photons out into space. For the planets to fly apart, you would have reverse the photons as well, and aim them super precisely, and define the in
68.
by maho 11y ago
This was a great read! But I wish the article would have mentioned how tiny the microscopic time-reversal effects are, compared to macroscopic time reversal. The microscopic effects are too small to explain why we have such a clear directio
69.
by maho 11y ago
To me, the better idea would be to place mirrors in orbit that focus solar radiation on the rocket. A sort of ground-based-microwave/space-based-solar hybrid rocket.
70.
by maho 11y ago
Have you tried a playback-speed of 1.5? (It's under "Settings -> Speed") The "YouTube voice" works nicely at 1.5x speed, and in my experience, most of the fluff becomes tolerable when it's shorter by 33%.
71.
by maho 11y ago
I enjoyed the quiz, but I am not a big fan of the positive_effect/no_effect/negative_effect classification, because it hides the error of the measurement. Instead, I propose to use a slider, like: > "In your estimate, how
72.
by maho 11y ago
To be fair, one should mention that the license of the extension pack allows you to install it at work and "run your multi-million euro business with it", without having to pay anything. https://www.virtualbox.org/
73.
by maho 11y ago
By pure chance I had just sat down at a piano, trying to figure out my old music sheets that I had managed to play, with lots of stress and never well in any sense of the word, 10 years ago. (My piano lessons got me to "Fröhlicher Land
74.
by maho 11y ago
In the recent discussion about the article "Almost everything in Dr. Strangelove was true" [0], mikeash posted a link to a captivating alternate-history story about the Cuban Missile Crisis going horribly bad: http://ww
75.
by maho 11y ago
You are absolutely right, I should have used the formula for adiabatic expansion. However, I maintain that the pressure inside the thermos should only be 60atm, since this is the vapor pressure of CO2 at room temperature [1], where the liqu
76.
by maho 11y ago
A few calculations about the possible explosion: - Assuming the inside of the thermos is at room temperature (and that there was enough dry ice initially), the pressure should be around 60bar. This is the vapor pressure of carbon dioxide at
77.
Why interval arithmetic is so useful (2007) [pdf](subs.emis.de)
29 points by maho 11y ago|5 comments
78.
by maho 11y ago
Interval arithmetic [1] has been around since the 1950's, I believe, but for some reason it never caught on. In a nutshell, interval arithmetic is about storing each imprecise number as a lower bound and upper bound. On each calculatio
79.
by maho 12y ago
I once wanted to measure the temperature dependence of some electronics component. Aha, I thought, I don't need no oven or such fancy things, I will just do my measurement while cranking up the room temperature, which I can record with
80.
by maho 12y ago
I do not want to discourage people from playing with cool stuff, but for safety reasons, I would like to give a few examples of what can go wrong: LN expands by 700x when it evaporates and warms up to room temperature. This makes thermoses
81.
by maho 12y ago
I'm impressed that it also gives results for Europe. But how do I switch to metric units?
82.
Quantum made simple(toutestquantique.fr)
1 points by maho 12y ago|0 comments
83.
by maho 12y ago
Related question, sorry for hijacking this thread: Are there any simulator-games out there? Like: "Here are available components in your components box, now draw a circuit that lights an LED without distroying it, regardless how the 5V
84.
by maho 12y ago
I highly recommend this book. The first practical lesson, as I recall, has you short-circuit a battery and destroy an LED. It's great to learn the limits of typical components this way, and it takes away the fear of breaking stuff. It&
85.
by maho 12y ago
> 'Never' seems like quite a generalization. What about e.g. Classify and Predict, or FormFunction, or Interpreter, or Nearest? Do those all not do quite what you need? Certainly, there are many functions that do what I need -
86.
by maho 12y ago
Mathematica demos sure look pretty [0]. But I recently tried to get actual work done with Mathematica and found the experience utterly ridiculous. The high level functions, while nice for demos, never quite do what you need. Want to display
87.
by maho 12y ago
My employer (German) just banned all Google products (except search) for work-related things, due to privacy issues. Reading Google's latest terms-and-conditions, this move is somewhat understandable, given the strong privacy laws that
88.
by maho 12y ago
This reminds of the "proton enhanced nuclear induction spectroscopy" [1], which is notable because its acronym almost spells out the name of one of its inventors (Alexander Pines). [1] http://en.m.wikipedia.org/wik
89.
by maho 12y ago
You mean KeySight?
90.
by maho 12y ago
For me it doesn't work in Firefox 24 ESR, but it does work in Chrome.

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