joshvm

60 ms·

691.
by joshvm 7y ago
Oxford also tried something similar by implementing their own entrance tests for engineering and physics (and other subjects). The idea was to stop private school kids with straight A GCSEs and A-levels from dominating. The entrance tests a
692.
by joshvm 7y ago
You can, but that's irritating to do. In the case of the Pi there is no barrel connector, it's a USB port. So your only option is the header, either directly into the holes if its unpopulated, or get a 40-way female header and sol
693.
by joshvm 7y ago
You can build an enclosure with tapped holes to accept locking USB cables. Very common for camera systems. Also providing a USB header on a high-speed expansion header is standard in the 96 Boards spec I think. https://www.96boar
694.
by joshvm 7y ago
For example, I put embedded computers on drones and the first thing I do is have to figure out how to get power in that avoids the barrel jack which will almost certainly vibrate itself out. On the Pi (and most boards) that means direct pow
695.
by joshvm 7y ago
Nobody has mentioned how much an entire ventilator costs. Best I can find is between $5-50k usd. For example a Puritan Bennett 980 quoted as around $50k (by the manufacturer) with a $2k a year service contract. https://www.medtro
696.
by joshvm 7y ago
This is US-specific. Some companies like Just Eat (UK, Canada, Mexico and others) specifically say that the price has to be the same. To avoid the situation where you use their service as a convenient menu/opening time check, and then
697.
by joshvm 7y ago
It's a great project. I built a lidar scanner for my PhD (still have the bits and a £2.5k galvo in a box somewhere). Didn't make the actual lidar unit though. This has basically become possible due to cheap and accessible TDCs. Bo
698.
by joshvm 7y ago
You can use either, according to the WHO (they give recipes for both).
699.
by joshvm 7y ago
The panic buying has also trickled over to isopropanol/IPA. I needed to buy some anyway and I picked up a litre earlier this week for about £6. At the time Amazon had a lot for sale, now they're all out. Given that consumer hand
700.
by joshvm 7y ago
Ish in the UK, see http://static.ofcom.org.uk/static/spectrum/fat.html Some ranges are usable for Industrial/Scientific/Medical (ISM), and there are exempt low power devices although I leave it as an exe
701.
by joshvm 7y ago
You hope that you have printed backup codes for whichever services provide it, or alternative auth, or you go through ID verification to regain access. Not much else you can do, the point of 2FA is that you can't get in without it. Som
702.
by joshvm 7y ago
It seems like this is a variant of the N-queens problem, which you can solve by backtracking. So it should be fairly easy to modify to include more sprinklers including using tiles for other things like scarecrows. And actually it's a
703.
by joshvm 7y ago
Roam looks fun, having played around with it briefly. There doesn't seem to be a way of getting it offline though (data export is possible) which is a bit of a killer for a note taking app, at least for me. I don't mind so much ab
704.
by joshvm 7y ago
Sure, it's a good exercise in infrastructure. 3Mbps doesn't sound much, but that's constant bandwidth. I have a 15 minute commute, which would make each journey about 400MB of data. That adds up quite fast especially on a mob
705.
by joshvm 7y ago
The obvious question is why not use a local accelerator? Either the Neural Compute Stick or the Google Coral both have more than enough grunt to run real-time object detection models. Both will run on USB2 power. I don't know the overh
706.
by joshvm 7y ago
I don't think pjreddie invented SSD, at least he's not on the author list. https://arxiv.org/abs/1512.02325 Yolo is great though and a fork is very actively maintained on GitHub at alexeyAB/darknet. Dark
707.
by joshvm 7y ago
This is also standard in certain secure facilities and I've visited companies that use them. They're called scramble pads. I think you get better at entering the numbers, and you wait until you see the sequence before going for th
708.
by joshvm 7y ago
Well, quite. But again this is all supplementary information. The car should have a basic idea of the speed limit from a database and it should adjust as appropriate. Similarly the car should be able to identify road surface conditions and
709.
by joshvm 7y ago
Price per kwh is not solely about generation efficiency, it's also about distribution and infrastructure. There will always be a cost associated with that which will rise with inflation. Even if we went totally renewable and all your e
710.
by joshvm 7y ago
Neither is ideal. But you should use what information you have. There is still no excuse for making a decision like 85 in a 35. Worst case this should be a disengage or the car could defer to you - eg visual warning on the dash "speed
711.
by joshvm 7y ago
However if the sat nav gives you a prior that says 35 mph, and the road sign says 85 mph, do you trust it? Especially if the adjacent roads are also low speed, and it's clearly not a highway etc. This is perhaps a bad example as there
712.
by joshvm 7y ago
I don't see why you need special cases in the code. Sat nav units have had speed limits built in for years. Why not just look it up in a database? (the car knows where it is after all, and requiring a GPS fix could be mandatory - most
713.
by joshvm 7y ago
The main advantage I see is that the markdown diagram is understandable in plaintext. That's quite a powerful idea because you don't need to understand any intermediate language. Graphviz and mermaid are interpretable, but not in
714.
by joshvm 7y ago
Well it's true today as well. I know immediately that something's gone wrong if I'm training an ML model and the GPU fan spools down.
715.
by joshvm 7y ago
Trainline, despite the annoying booking fee does, does this quite well for a good chunk of Europe. If you need timetables then Bahn.de also covers almost all of central Europe and the app is usable. You can even do eg London to Beijing. The
716.
by joshvm 7y ago
In the UK you have described Which. They've been around for years and getting a "best buy" rating is generally seen as a big deal (certainly it will get you sales). Their website does have a lot of blogspam type content now,
717.
by joshvm 7y ago
The word would be electrical engineer :) There are at least two O'Reilly "Cookbooks" for electronics. The best way to do this as a hobbyist, if you don't want to read textbooks, is just to mess around and soak up informa
718.
by joshvm 7y ago
Might not be exactly the same use case, but a simple example is compiling large libraries on constrained/embedded platforms. Building OpenCV on a Pi certainly used to require adding a gig of swap.
719.
by joshvm 7y ago
You need to have a known-good test dataset that is as representative as possible. Something that you are absolutely sure is golden - i.e. someone has gone through it manually and verified all the labels are correct and complete. Then it doe
720.
by joshvm 7y ago
This is the same for MS COCO: https://github.com/AlexeyAB/darknet/issues/4085 Lots of datasets are semi-automatically generated, with human oversight. Sometimes annotators miss things or are just plain lazy.

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