dom0

15 ms·

121.
by dom0 9y ago
> Tesla and Steinmetz figured out the theory of AC machines in the early 20th century. This was the first industrial technology where you needed advanced math to get anything to work right. Complex numbers. Calculus. Laplace transforms.
122.
by dom0 9y ago
Depends on the windings. Synchronous motors have had windings designed for sq. wave drive for many years now, prominently for stepper, servo and BLDC motors. These still use some filtering to reduce the insulation stresses.
123.
by dom0 9y ago
Yes, this was done on purpose :)
124.
by dom0 9y ago
> Machine learning excels at classification, and trash sorting is at heart a classification problem. Classifying by physical properties is even easier by simply classifying by physical properties. Want to pull all ferrous metals out of
125.
by dom0 9y ago
Just hook an old Quantum Fireball or something similar up to the power, they spin up with no controller connected.
126.
by dom0 9y ago
"Leaked"
127.
by dom0 9y ago
No, perpetual motion means more energy from less. This moves mined rock downhill, so the work of moving it uphill was done by geological formation.
128.
by dom0 9y ago
~infty / until the mechanical brakes are worn down after the battery is fully charged from driving.
129.
by dom0 9y ago
1.3 m/s² is quite something, quite a bit more than a typical tram or S-Bahn (both ~1 m/s², which is still quite a pull...).
130.
by dom0 9y ago
You don't really need a toolchain , it can all be done lazily be the web application server.
131.
by dom0 9y ago
> without horrible hacks like sticking the asset checksum in the URL. What's wrong with this approach?
132.
by dom0 9y ago
> One operation from over 50 years ago is your example? Back then the spooks were doing far worse, conducting operations against domestic civil rights groups. Or torturing Americans civilians for eh... testing whether interrogation tech
133.
by dom0 9y ago
Some blamed the NASA hack (this day 30 years ago) on the Russians at first. (And that actually wasn't off by much, see the KGB hacks).
134.
by dom0 9y ago
Python if statements will branch on very few processor instructions in the VM; so I don't think branch prediction of the processor is able to predict different Python if's — they're all the same to it. Well, that... and even
135.
by dom0 9y ago
Much plain reference data is missing from the docs (like return types). Its neat to describe a function, but if you don't hand out the API, then the docs are not all that useful.
136.
by dom0 9y ago
Django has a very deep package tree, there are tons of stuff in there — a lot of things you wouldn't expect.
137.
by dom0 9y ago
> I'm not sure that you've taken the time to understand python development practices. I think this tone is misplaced here.
138.
by dom0 9y ago
There are still widely used packages that don't work with pip, like PyQt.
139.
by dom0 9y ago
Ruby is just used rarely outside RoR, realistically speaking.
140.
by dom0 9y ago
Render. The specularity of the surfaces is not quite right yet... with some more tweaking this could sure pass as a photo, though. Some wear marks are odd, too, but that can happen in real-life, too.
141.
by dom0 9y ago
The cycles render is a pseudo-random path tracer, so the less samples are taken the higher the random noise. Increasing the samples and some other tweaking reduces the noise significantly, but also takes much more time. Denoising the render
142.
by dom0 9y ago
Title is inaccurate, Windows, Linux and macOS are all affected. > Microsoft is issuing security patches to all supported Windows versions at 10 AM, Tuesday, September 12. > Information on Linux updates will be provided as soon as they
143.
by dom0 9y ago
By definition, if your site is down, you don't need your assets.
144.
by dom0 9y ago
Does not seem to affect Europe. In fact, right now YouTube loads far quicker than it has for the last seven to ten days, where it would take ages to load any YouTube page.
145.
by dom0 9y ago
Durable has a very specific meaning for I/O and is just not correct here. POSIX does intentionally not specify any durability at all (e.g. a no-op fsync is explicitly permitted).
146.
by dom0 9y ago
The rate of computation is obviously very similar for threads and async, but the rate of multiplexing is not. Switching between processes or threads takes more time than switching between fibers/coroutines. So the general observation t
147.
by dom0 9y ago
Other systems (Windows and I think Solaris, but some more obscure systems likely do this as well) can do asynchronous disk IO, but it's not perfect, either. I think the main reason Linux doesn't really do it is that asynchronous I
148.
by dom0 9y ago
The "BOM" lists a 35 Ah / 12 V battery, which is reasonable. A 420 Ah battery is (a) a boutique item (b) should weight around 120-140 kg (c) does not fit into a toolbox (d) costs significantly more than 299 $. — From a profes
149.
by dom0 9y ago
My data point would be Borg Backup, which, if you were to consider Bountysource to be payment for development, is under-financed by perhaps a factor of 40. 80+ % of funding came from three organizations. And what I've heard from other
150.
by dom0 9y ago
It's far easier to make a phone surviving regular toilet dives than teaching people appreciation of things, or mindfulness. Ain't nobody got time for that.

More ›