joshvm

95 ms·

961.
by joshvm 8y ago
This kind of stuff is a good candidate for Zooniverse. Have a look at some of the ship log projects, for example.
962.
by joshvm 8y ago
Once you've done fast.ai, you can look at OpenAI's crash course in reinforcement learning: https://blog.openai.com/spinning-up-in-deep-rl/
963.
by joshvm 8y ago
Yes for linear algebra, though it's probably best suited to people with at least some exposure to matrix/vector math (for example you've used SVD but have no idea how or why it works): https://www.fast.ai/2017
964.
by joshvm 8y ago
Yes, this was online before Christmas (at least)
965.
by joshvm 8y ago
Also see https://radiojove.gsfc.nasa.gov/
966.
by joshvm 8y ago
Usual caveat that you'll only get headline performance at 80% reflectivity, maybe a number plate? Also the IP67 rating system doesn't cover the cooling system (only IP55). Hokuyo 2D systems start from about $1k and are well regard
967.
by joshvm 8y ago
Yes, but historically this research is barely seven years old (Alexnet was published in 2012). There was lots of research into object detection before deep learning became usable, mostly based around feature engineering (keypoints, deformab
968.
by joshvm 8y ago
I suppose it depends on the bandpass of the filter. I have several older phones which can take (rear) images of IR leds - we used this as a sanity check at work several times. Images of normal things didn't look noticeably worse for ha
969.
by joshvm 8y ago
IR is often used for facial recognition (invisible pattern projectors or to better illuminate skin texture). However in colour pictures you get a strong purple cast in some conditions, like bright sunlight, due to excess near infrared radia
970.
by joshvm 8y ago
Will do!
971.
by joshvm 8y ago
You could try making it wireless rather than put the logging on the gun. Something like an Esp8266 might do it if you buffer the measurements. Also look at the Particle Photon which will do TCP out of the box. Squirt the data to a pi and do
972.
by joshvm 8y ago
This is actually how several LIDAR scanning stations are allowed to be called class I (or maybe II) devices. The lasers inside would do bad things to your eyes (easily class 3). Because they're pulsed and spinning, the odds of you gett
973.
by joshvm 8y ago
> I see no downside to this shift from major corporate beer to smaller, local craft fare. This is a model which has worked for hundreds of years in Germany. If you go to a local pub, you tend to either get a regional beer (eg hofbrau in
974.
by joshvm 8y ago
You need to think like an interviewer - what can you reasonably make someone do in half an hour (plus time for chat and questions after)? Apart from being able to parrot deep learning theory, implementing things is tricky. Do you learn anyt
975.
by joshvm 8y ago
Do you fancy chatting further about this? I've been toying with writing a hacker's guide to spectroscopy, and it would be interesting to know what sort of experiments schools would find useful. Feel free to get in touch at josh at
976.
by joshvm 8y ago
>I know you're having trouble due to the costs associated with low volume, but to an ordinary purchaser your price looks like a rip-off. Yup, being a hardware engineer makes you appreciate just how cheap some things are. Bear in min
977.
by joshvm 8y ago
Interesting - the system we sell is better than 5nm (depending on the fibre) and is in that price bracket. What's the application in mining?
978.
by joshvm 8y ago
This would be an absorption photometer or something similar. You shine light of a known wavelength through your sample and measure the intensity that's transmitted. If you have enough wavelengths and they're useful (ie you're
979.
by joshvm 8y ago
I designed, and my old company sells, a NIR/VIS spectrometer at around the £800 mark (I forget if that's Inc vat). It's easy to use, has a WiFi interface, a simple python API etc. It's a scientific grade instrument and c
980.
by joshvm 8y ago
One thing to bear in mind with these kind of DIY spectrometers is that typically you only perform a wavelength calibration (e.g. you can transform from pixel number on the detector to wavelength). That's reasonably easy to do with a CF
981.
by joshvm 8y ago
Qt as an ecosystem is fairly complete for general application development. It includes, among other things, concurrency primitives (QtConcurrent) that are trivial to use*, sockets, database support, serial port drivers and charting (qwt for
982.
by joshvm 8y ago
They were probably taken on Kodachrome, which was renowned for its colour reproduction (or at least its aesthetics). It's also archival quality film, so older negatives don't age much if kept in the dark. It was also designed for
983.
by joshvm 8y ago
> Facebook had been aware that an update to its Android app that let it collect records of users' calls and texts would be controversial. "To mitigate any bad PR, Facebook planned to make it as hard as possible for users to kno
984.
by joshvm 8y ago
You're not given frequencies, you're given offsets/errors which affect the overall drift.
985.
by joshvm 8y ago
There's an ongoing debate over whether to go the Kicad approach with a unified footprint library or Eagle where every part has its own footprint/symbol pair. The Kicad approach makes it easy to add new parts with known footprints
986.
by joshvm 8y ago
>My tutor definitely spoke Spanish to me, but the first several months was all in English. I hate the teaching method where a teacher just yammers away in the target language, as if (again) by magic and special miming gestures, the stude
987.
by joshvm 8y ago
> I suspect these two put together are actually the reason why it's easier to learn languages as a child. This is a difficult comparison to make. When we say easier, I think we mean without conscious effort (e.g bilingual kids). How
988.
by joshvm 8y ago
As far as possible, you don't put complex electronics in there. Motors connected by an umbilical cable to the operator, analogue sensors, etc. In some situations you might be able to use a mechanical or hydraulic system. See: https:&#
989.
by joshvm 8y ago
Apparently removing it may have other consequences: > Even if editing worked perfectly, people without normal CCR5 genes face higher risks of getting certain other viruses, such as West Nile, and of dying from the flu. Since there are ma
990.
by joshvm 8y ago
This is an extension kit to a well designed and well adopted embedded system. The OPs complaints to me read as: nobody wants these features because the stock model works for OP, and that the price was jacked up to cater to an industrial mar

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