gh02t

65 ms·

721.
by gh02t 8y ago
It depends on the field you're in. For example, if you're in an area that heavily uses differential equations (many engineering disciplines) then you're probably gonna be using eigenvectors a lot, as they are important for so
722.
by gh02t 8y ago
The other answers don't quite address why you would prefer this specifically versus Fusion 360 or TinkerCAD (or OnShape, SolidWorks etc). Simple answer: they (cadquery and OpenSCAD) are free and open source. Fusion 360 for example is f
723.
by gh02t 8y ago
I actually find the practicalities of algorithm choice even more fascinating. For example, Strassen's algorithm is asymptotically the fastest known algorithm for dense matrix multiplication in certain situations (medium sized matrices)
724.
by gh02t 8y ago
I've been eyeing one for a long time. I use an original HP-42S I stole from my father that's older than I am, but I almost spilled coffee on it the other day, which made me realize it's probably time to invest in the SwissMic
725.
by gh02t 8y ago
Pretty much any simple (i.e. easily cloned) item under $10 suffers. Sellers know it's not worth the hassle of packing and returning something. Only about 5% of customers post reviews and since the items are cheap sellers can afford to
726.
by gh02t 8y ago
> AWS, GCP, and Azure all have IoT bridges that speak MQTT. Also worth noting for the curious that it's very easy to host your own, e.g. via Mosquitto.
727.
by gh02t 8y ago
It definitely happened, Amazon said it was a bug that caused Alexa to be more likely to interpret silence or random noise as "laugh" after a false trigger (or something along those lines). I suspect it was either a legitimate bug
728.
by gh02t 8y ago
Pets can be helpful, but I really want to say also that you shouldn't be afraid to try antidepressants. There are all sorts of stigmas about how they make you a zombie etc, but the fact is that they do work for people and I know plenty
729.
by gh02t 8y ago
I was joking, I have actually used APL a bit and quite enjoy it. Array based programming is quite intuitive once it clicks in your head and I think at least a conceptual understanding of APL is very valuable even when using other languages
730.
by gh02t 8y ago
As far as I know (which isn't very far, admittedly) they only really managed to reach parity with some performance gains over x86 in a few niches, but it's also a bit chicken-and-egg. It never had enough attention to really get th
731.
by gh02t 8y ago
Depends on what is "easy" for you. Haskell is syntactically dense and can be obtuse in the hands of many authors, but on the other hand I find it easier to read well written Haskell because it's easier to break down into chun
732.
by gh02t 8y ago
Itanium suffered performance wise initially because they had trouble with compilers, but that's not the whole story. You also have to consider that AMD launched AMD64, which was backwards compatible, at about the same time. Later on
733.
by gh02t 8y ago
Funny, AT&T is more expensive than Spectrum where I am for even worse (if that's possible... Spectrum is pretty bad) service. We're also a Google Fiber location (albeit one of the ones that is currently frozen) and when it was
734.
by gh02t 9y ago
Capacitor size is pretty much set by the technology, but where possible smaller equivalent parts are usually cheaper . You can't spam this in all of your products anyway because it makes it too likely that you'd be discovered, pl
735.
by gh02t 9y ago
Such a device would be severely restricted in what it could exfiltrate just based on bandwidth limitations. I'm not super knowledgeable on RF, but I believe that something the size of a SMD resistor or capacitor would be too small to c
736.
by gh02t 9y ago
So part of the point of tamper evident seals is that they are difficult to duplicate. The bags themselves should be readily verifiable, eg with a serial number for basic verification at least. The sort of seals used for nuclear treaty enfor
737.
by gh02t 9y ago
There's another article on HN right now about it, one of the comments provides some insight: He was not providing people with restore media they could use to fix their own machines. He was taking the restore media, burning it
738.
by gh02t 9y ago
I have mixed feelings. Their tutorials and selection are great, but their markup is pretty obscene on some parts and their libraries are often over-complicated/take up a ton of space. I try and support them and buy parts from them occa
739.
by gh02t 9y ago
In addition to what others have suggested, Adafruit and Sparkfun both have loads of tutorials. Even if you're not using their parts their documentation is still some of the best if you're using a similar part. Good way to get star
740.
by gh02t 9y ago
I'm under 30 and I don't get it either. I use my phone to communicate and perhaps read the news if I'm waiting at the pharmacy or something, but I don't understand a lot of the comments here regarding addiction to their
741.
by gh02t 9y ago
Yeah, in the article he uses a good old MAX3232, which is specifically for doing RS232 to TTL level shifting. Totally agree, the Saleae or one of the cheaper clones I linked is a better choice for most hobbyists. Scopes are indispensable fo
742.
by gh02t 9y ago
Saleae gives their software away for free, there's not any need to pirate it but still using their software is morally shady IMO because they put a lot of effort into it. I prefer Sigrok anyway, even with the actual Saleae analyzers. A
743.
by gh02t 9y ago
For decoding serial one of those $5 logic analyzers is more than sufficient, you don't really need an oscilloscope at all. I don't really like using protocol decoding on my scope unless I need to correlate timing with an analog si
744.
by gh02t 9y ago
Neat, I didn't know about this chip. Is there anything particular about a stack architecture that makes it ideal for radhard applications, or is it just the one they selected because they wanted to use Forth?
745.
by gh02t 9y ago
I'd say the Shapeoko is actually a bit easier to use than a 3D printer (a makerspace staple)- you don't have to do any of the more complicated CNC/CAM things like creating toolpaths or calculating feedrates if you just want t
746.
by gh02t 9y ago
A lot of these old film and paper records of nuclear tests are literally rotting away. This is a problem for researchers in the area (who do stuff like designing optimal strategies for first responders to a nuclear attack), because it'
747.
by gh02t 9y ago
I dunno that this is really any easier to use than a Shapeoko, which is $1900 for the largest version (33" x 33" x 3" working area) with router included. The software for Shapeoko is pretty idiot proof, it can do a 2D carve f
748.
by gh02t 9y ago
To answer your question: The gain in dBi is 10 * log10(linear gain), so the linear gain is 10^((gain in dBi) / 10). So 5 dBi is a gain of 3.16, and 6 dBi is 3.98. Log rules mean you can just subtract, so the difference is 1 dBi, meanin
749.
by gh02t 9y ago
You can get USB-OTG cables that split off so you can plug in a charger, but I think (not sure) that it's not universally supported to use USB-OTG and charge at the same time.
750.
by gh02t 9y ago
I'm aware, but it's not a very clean solution. Now you need a USB-OTG cable with charging and a USB ethernet adapter. Also in my experience (which was admittedly limited since it didn't work well) it was very crashy, with the

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