mhandley

77 ms·

841.
by mhandley 11y ago
NeWS was really cool. Back in 1987/88 I used an early release of NeWS for my final-year undergrad project. It was made a little more challenging by only having a photocopy of a pre-release of the documentation, that was missing all t
842.
by mhandley 11y ago
We had some face-tracking Sony pan/tilt cameras in the mid 1990s. They were also racist - they worked fine for me but wouldn't track an Indian friend of mine at all.
843.
by mhandley 11y ago
The examples all seem to only work in two dimensions. "Spring" and "latch" need external alignment to keep them on the same axis, and "align" only works when the magnets are touching. Is that just because the
844.
by mhandley 11y ago
I wonder if Apple has a key revocation procedure for their signing key? It would have been sensible to have done this anyway, in case the key was compromised. They must, after all, be one of the highest profile targets, both for criminals
845.
by mhandley 11y ago
It's been a very long time, but I guess this 1979 Judge Dredd story made an impression on me as a kid because it was immediately what came to mind: http://dreddalert.blogspot.co.uk/2014/01/judge-dredd-great-p.
846.
by mhandley 11y ago
It becomes interesting when a company operates in the UK, but does all its software development elsewhere. UK law can't compel foreign software developers not to talk about what they've been asked to do, so I don't really be
847.
by mhandley 11y ago
Yes, but remember that Lockheed and Boeing (in the form of ULA) will be using Blue Origin's BE-4 engine for their next heavy launcher. There's more than one way to become a big player in this game. Blue Origin aren't tryng t
848.
by mhandley 11y ago
If the resale value of an out-of-warranty Tesla ends up being essentially zero, the new ones will start to look like a pretty poor investment. This will impact Tesla's sales. You can be pretty sure that Tesla will rectify this eventu
849.
by mhandley 11y ago
It looked like it was somewhat off-center just before the video froze. Hope I'm wrong.
850.
by mhandley 11y ago
The full webcast is also available here: https://www.youtube.com/watch?v=muDPSyO7-A0 and the technical webcast (without commentary) is here: https://www.youtube.com/watch?v=sIkPP2LM8DU
851.
by mhandley 11y ago
A 12V deep-discharge lead-acid battery is typically 120amp-hours. That's 1.4kWh. Suppose you only 50% discharge it for longevity, that's 700Wh. I'll assume your box of batteries has ten of them, so a usable capacity of 7kW
852.
by mhandley 11y ago
There are a few utility-scale flywheel systems deployed: http://beaconpower.com/stephentown-new-york/
853.
by mhandley 11y ago
Elon Musk: "Launch aborted on low thrust alarm. Rising oxygen temps due to hold for boat and helium bubble triggered alarm."
854.
by mhandley 11y ago
Abort, just after engine start.
855.
by mhandley 11y ago
First launch attempt was held at T-1:30 due to a range safety issue. Not scrubbed yet. They've recycled the countdown clock to T-10:42, but still holding.
856.
by mhandley 11y ago
Here's the abstract: On September 14, 2015 at 09:50:45 UTC the two detectors of the Laser Interferometer Gravitational-Wave Observatory simultaneously observed a transient gravitational-wave signal. The signal sweeps upwards in frequen
857.
by mhandley 11y ago
Most of the content I read comes through places like HN. If Wired loses many of the more active participants on HN (who are probably more likely to run adblockers), their articles will get posted less and upvoted less, so they'll lose
858.
by mhandley 11y ago
Interesting - I didn't know that. But the article you cite says it only really happens in tropical waters above 30C (86F). Is there evidence plastic decomposes in sea water in cooler climates?
859.
by mhandley 11y ago
They learn values by the example you set, but that doesn't mean they share your interests.
860.
by mhandley 11y ago
The interesting thing about that study is that the protective effects only work if you're exposed before you're one year old. This makes it a bit late for most of us on HN.
861.
by mhandley 11y ago
Why don't electric cars come with a tiny kerosene cabin heater as standard? A small heater would take up little space or weight, could be easily refueled at home so not need a detour to a petrol station, and be much more cost effectiv
862.
SpaceX failed landing caused by leg failing to latch(spaceflightnow.com)
3 points by mhandley 11y ago|3 comments
863.
How to Build a House on Mars Using Only Materials on Mars(citylab.com)
1 points by mhandley 11y ago|0 comments
864.
by mhandley 11y ago
Firefox will encrypt your saved passwords if you set a master password on the Security Preferences panel. Really should do so by default, but at least it's available as an option.
865.
by mhandley 11y ago
The equivalent stock Arduino demo is blink: void setup() { pinMode(13, OUTPUT); } void loop() { digitalWrite(13, HIGH); delay(1000); digitalWrite(13, LOW); delay(1000); } From my experience of teaching ma
866.
by mhandley 11y ago
If you don't believe we need IPv6, read and properly understand the awful mess that is ICE: http://tools.ietf.org/html/rfc5245 This is what VoIP and other similar peer-to-peer applications do today to get connecti
867.
by mhandley 11y ago
Would you fly passengers on the test flight of a new plane? Yet we do that with rockets. After they've done this a bunch of times to understand any fatigue and thermal degradation problems properly, it should be safer to fly a reused
868.
by mhandley 11y ago
If you're going to use huge tethered balloons, why use PV? You've got the benefit of strong predictable winds up there, 24 hours a day, so once you've bought into the cost of tethered aerial power, wind seems a better bet.
869.
by mhandley 11y ago
So if a celebrity wears a designer hat or jewelry and they own the copyright to it, they can sue the gossip magazines for publishing unauthorized photos taken in a public place (which would normally be fair game)? Could be fun to watch how
870.
by mhandley 11y ago
It's more correctly known as a logistic curve. The Wikipedia page has quite a few references: https://en.wikipedia.org/wiki/Logistic_function

More ›