As a quick and dirty rule of thumb measuring parts per million in anything except time or frequency will get expensive. Temperature drifts will cause expansions and contractions on that order if you’re measuring lengths.
Yes fun story, Jack was an assistant signalman and got paid for the job, partially in beer! https://en.m.wikipedia.org/wiki/Jack_(baboon)
By 1870 pi was known to several hundred decimal digits, for something like this calculation where you have other large sources of error Archimedes approximation from 2 millennia earlier would probably be fine. (<1%…
Oxide makes a rack-scale computer called the Oxide Computer, here's the intro page: https://docs.oxide.computer/guides/introduction
That phrase distinguishes the internal group responsible for that part of the architecture, don’t think it’s a marketing term.
Could have been Earl Muntz, who was in the TV manufacturing business, learned about this from one of Bob Pease’ columns. https://www.electronicdesign.com/technologies/industrial/boa...
The explanation is really well done, it captures the essence of the Pauli exclusion principle without delving too deeply into the weeds. In my opinion the best part of the video is the explanation of the "hole"…
NREL has a great visualization for the research cell (as opposed to module) side of things here: https://www.nrel.gov/pv/cell-efficiency.html
Funny story, that demo only exists because the designer was mis-categorized as a software engineer after an acquisition by Apple. After nearly getting the person in question fired it ultimately resulted in a successful…
Was it this one perhaps? https://news.ycombinator.com/item?id=7261003
From the paper it looks like most of the interesting work with the laser and optical train use an external board to recreate the feedback and control circuitry already present and required for normal operation in a…
Neat hack, but why would you want a fan on the internet?
There's an episode of James Burke's Connections that explores this idea with a bit of depth, I recommend watching the whole series if you have the time. James Burke Connections, Ep. 4 "Faith in Numbers"
Arecibo is and has been used for radar astronomy as well https://en.m.wikipedia.org/wiki/Radar_astronomy
You can use the phenomenon of negative differential resistance to improve the design of some very common circuit elements. For example you can move from a classic six transistor SRAM cell to a two transistor design.…
This is a pretty thorough description of generation, not just the classification problem that is the usual introduction to machine learning. I just loved the map of the generated place names [1] the illustrations are…
Link to the other HN thread on this topic: https://news.ycombinator.com/item?id=5391667 If the comments are to be believed someone's already lost their job over this.
Unless the planets happen to orbit very stable stars in the plane that sometimes puts them between earth and their star. With Kepler and some earth-bound telescopes you can discern the brightness dips from these and…
I use Better Touch Tool [1] which is mostly about expanding defaults for multitouch gestures. I haven't gotten around to using the Better Snap tool which focuses on window management yet. [1] http://blog.boastr.net/
That's exactly the application they're after. When these discussions happen I like to calculate some hard systems numbers since they're rarely in either the literature or the popular science articles. All the power…
Trace amounts perhaps. Generally speaking radiative heat scales as T^4 where your temperature is measured on an absolute scale like Kelvin. In addition most of the heat flux being radiated by a human falls in the the…
If you want to implement it in a general way you still need to know how javascript supports closures though.
Completely agreed about 44.1kHz being a sampling rate. To make the rest of the numbers nicer I'm going to pretend we're talking about 40kHz sampling for the rest of this comment. It's clear that you can't distinguish…
Assuming 44.1kHz sampling rate the smallest path length difference between the ears is approximately 6.8mm. This corresponds to 2.3 degrees (with sounds source at infinity). Humans can place sounds with about 3 degrees…
Zero loss is only true for DC transmission. It's true, loss is lower than copper at 50-60Hz AC but radiative losses don't magically disappear. You're also limited in how much current you can carry since…
As a quick and dirty rule of thumb measuring parts per million in anything except time or frequency will get expensive. Temperature drifts will cause expansions and contractions on that order if you’re measuring lengths.
Yes fun story, Jack was an assistant signalman and got paid for the job, partially in beer! https://en.m.wikipedia.org/wiki/Jack_(baboon)
By 1870 pi was known to several hundred decimal digits, for something like this calculation where you have other large sources of error Archimedes approximation from 2 millennia earlier would probably be fine. (<1%…
Oxide makes a rack-scale computer called the Oxide Computer, here's the intro page: https://docs.oxide.computer/guides/introduction
That phrase distinguishes the internal group responsible for that part of the architecture, don’t think it’s a marketing term.
Could have been Earl Muntz, who was in the TV manufacturing business, learned about this from one of Bob Pease’ columns. https://www.electronicdesign.com/technologies/industrial/boa...
The explanation is really well done, it captures the essence of the Pauli exclusion principle without delving too deeply into the weeds. In my opinion the best part of the video is the explanation of the "hole"…
NREL has a great visualization for the research cell (as opposed to module) side of things here: https://www.nrel.gov/pv/cell-efficiency.html
Funny story, that demo only exists because the designer was mis-categorized as a software engineer after an acquisition by Apple. After nearly getting the person in question fired it ultimately resulted in a successful…
Was it this one perhaps? https://news.ycombinator.com/item?id=7261003
From the paper it looks like most of the interesting work with the laser and optical train use an external board to recreate the feedback and control circuitry already present and required for normal operation in a…
Neat hack, but why would you want a fan on the internet?
There's an episode of James Burke's Connections that explores this idea with a bit of depth, I recommend watching the whole series if you have the time. James Burke Connections, Ep. 4 "Faith in Numbers"
Arecibo is and has been used for radar astronomy as well https://en.m.wikipedia.org/wiki/Radar_astronomy
You can use the phenomenon of negative differential resistance to improve the design of some very common circuit elements. For example you can move from a classic six transistor SRAM cell to a two transistor design.…
This is a pretty thorough description of generation, not just the classification problem that is the usual introduction to machine learning. I just loved the map of the generated place names [1] the illustrations are…
Link to the other HN thread on this topic: https://news.ycombinator.com/item?id=5391667 If the comments are to be believed someone's already lost their job over this.
Unless the planets happen to orbit very stable stars in the plane that sometimes puts them between earth and their star. With Kepler and some earth-bound telescopes you can discern the brightness dips from these and…
I use Better Touch Tool [1] which is mostly about expanding defaults for multitouch gestures. I haven't gotten around to using the Better Snap tool which focuses on window management yet. [1] http://blog.boastr.net/
That's exactly the application they're after. When these discussions happen I like to calculate some hard systems numbers since they're rarely in either the literature or the popular science articles. All the power…
Trace amounts perhaps. Generally speaking radiative heat scales as T^4 where your temperature is measured on an absolute scale like Kelvin. In addition most of the heat flux being radiated by a human falls in the the…
If you want to implement it in a general way you still need to know how javascript supports closures though.
Completely agreed about 44.1kHz being a sampling rate. To make the rest of the numbers nicer I'm going to pretend we're talking about 40kHz sampling for the rest of this comment. It's clear that you can't distinguish…
Assuming 44.1kHz sampling rate the smallest path length difference between the ears is approximately 6.8mm. This corresponds to 2.3 degrees (with sounds source at infinity). Humans can place sounds with about 3 degrees…
Zero loss is only true for DC transmission. It's true, loss is lower than copper at 50-60Hz AC but radiative losses don't magically disappear. You're also limited in how much current you can carry since…