joshvm

87 ms·

421.
by joshvm 5y ago
If you or a previous owner ever took out black box insurance, they install a GPS/accelerometer in your car. The insurance companies rarely bother to remove the trackers, so if you've had multiple policies you may end up with a cou
422.
by joshvm 5y ago
In theory high school algebra should be enough if you go through in order. Feynman introduces calculus in the chapter on motion (from first principles) and on it goes from there. The challenge is it's assumed that you're now fam
423.
by joshvm 5y ago
I think it's meant to be APAC - Asia PACific.
424.
by joshvm 5y ago
There was also a period when you could very easily (I guess you still can) buy "homebrew" cartridges for the DS, like the R4. Piracy was rampant. I have no idea what the scene is like now, but certainly GB/GBC/GBA/N
425.
by joshvm 5y ago
At the same power level and general availability with OK support, you're looking at the MyriadX/NCS2. Even then I think the Coral beats it on performance. Next step up is the Jetson Nano (10-15 W) which is a lot more beefy, but po
426.
by joshvm 5y ago
I'm on the fence. It's a very nice device if you can get your models working on it - basically untouched at the price/power point. Drivers for me have been OK. I have an M.2 card connected to a Jetson devkit (makes for a nice
427.
by joshvm 5y ago
You can see spot prices here: https://vast.ai/console/create/
428.
by joshvm 5y ago
I would always make a local variable for things like this, to avoid magic numbers (especially if a function signature has several numeric arguments). Then you can explicitly put the units in the variable name, e.g. duration_s = 300 and pa
429.
by joshvm 5y ago
This is actually an issue with thermal imaging cameras. Typically you'll get calibrated readings back in Kelvin, not in Celsius. Usually it's well documented by the camera manufacturer, but if you're providing an API to users
430.
by joshvm 5y ago
Canonically you should be using Meet and Chats. These both evolved from Hangouts, though I think GMail Chat and Chats are interoperable. You can think of them as Slack and Zoom targeted towards people who have already bought into GSuite whi
431.
by joshvm 5y ago
Yes. I have code in space that was funded by ESA and launched on a Falcon 9. If you count the ISS then SpaceX is a launch partner and is probably our best bet in the near future for shuttling people and cargo (plus the ATV). ESA is basicall
432.
by joshvm 5y ago
Newer ones are actually moving to CT. If you go through one of those security checkpoints, you don't need to take anything out of your bag. They were being used at some terminals at Heathrow - but confusingly not all. I think T2 has th
433.
by joshvm 5y ago
This is, I think, partly due to how the slicer routes the filament paths. I've had this problem moving between nozzle diameters and the only reason I could think of was that it wasn't possible for the slicer to maintain both accur
434.
by joshvm 5y ago
There's some interesting info from Zemax on manufacture. https://www.zemax.com/blogs/news/future-of-cell-phone-camera... Coarse manufacture is fairly simple - you can just press out plastic blanks. The tricks
435.
by joshvm 5y ago
My debit card in Switzerland came with a six digit pin - which was a surprise coming from the UK - and it works fine in other countries (Germany and Italy at least). But chip and pin is well known established in Europe so that's not t
436.
by joshvm 5y ago
Rate limiting can be practically strong for everyday use. Bank PINs are commonly 4 digits, though the chip+PIN system allows up to at least 6. Three attempts and the card is locked. Provided you stop users from picking obvious numbers like
437.
by joshvm 5y ago
Nvidia drivers are decent on Linux - almost all ML people use it and they're incredibly dependent on CUDA. Nvidia has a vested interest in this because they pivoted hard towards deep learning, but they're also comfortable because
438.
by joshvm 5y ago
There's also the Vestaboard (about 3k) if money is no object. Compared to the price of building one from scratch it's probably not a bad deal. 132 characters including colours. It is essentially an art piece, but it does look amaz
439.
by joshvm 5y ago
Not really, provided the duty cycle is low enough. Espressif chips can be set up so that they boot, run some code and then shut down with a timer (deepsleep). You can stretch the battery quite far that way. I did this to monitor temperature
440.
by joshvm 5y ago
Interesting, it reads a lot like the USAP participant [0] and field manuals [1]: [0] https://www.usap.gov/USAPgov/travelAndDeployment/documents/P... [1] https://www.eol.ucar.edu/system/fi
441.
by joshvm 5y ago
Rate limiting or clamping "0" delays upwards can also help for polling applications where you want to be as fast as possible, but you're never going to be actually zero. For example if you have a thread that's pulling
442.
by joshvm 5y ago
I think you're referring to McLaren lining their engine bay with a thin layer of gold? The use case here was very good heat transfer with low weight, since you only need a very thin layer to do it. "Aerospace" is unfortunatel
443.
by joshvm 5y ago
You’re right about some of the contacts, but the foil on the outside is similar to mylar, a plastic-based aluminised film. https://www.nesdis.noaa.gov/news/good-gold-are-satellites-co...
444.
by joshvm 5y ago
Is that an issue with Arduino? This PR [0] suggests a R/W compile is around 13k (or R/O for 5k) on an M0. I don't know if there'd be a big difference compiling for AVR though. [0] https://github.com/littl
445.
by joshvm 5y ago
People do this in Antarctica all the time. 100% offline is basically impossible, but very limited and high latency (we had a 3 second ping) is doable. Mostly you have to remember to download things when you get the chance. Get offline copie
446.
by joshvm 5y ago
Take a look at rasterio in Python (best installed using Conda because you need a few tricky dependencies like GDAL). It's designed for geospatial data that can be too large for RAM. You usually open data windows that are smaller views
447.
by joshvm 5y ago
Most high-accuracy systems incorporate an onboard calibration target of some kind. Could be a gas cell (either sealed or consumable) or a special lamp etc. Or you buy an instrument that comes with calibration coefficients from the manufactu
448.
by joshvm 5y ago
So there are a couple of issues at play here. First, a merchant can charge your account with only your card number, date and CVV. If you call up and pay someone, say an insurance company, that’s all they need. Now your bank might automatica
449.
by joshvm 5y ago
Yeah there are a few "bullet time" demos for clusters of Pis, very cool. Does your application use network based synchronisation, or do you hardware trigger? Whenever I've built computer vision systems it's simple just t
450.
by joshvm 5y ago
Hard to say as the firmware isn't in the repo as far as I could see. Most of the ARM camera interfaces are 14 bit parallel buses so it probably has one input. The cameras also output 10 bit parallel so I imagine it multiplexes somehow.

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