mhandley

31 ms·

331.
by mhandley 5y ago
The Royal Society report on greenhouse gas removal is pretty good. https://royalsociety.org/~/media/policy/projects/greenhouse-... It's not that greenhouse gas removal cannot be done, but as the ar
332.
by mhandley 5y ago
The Lightning had pretty amazing performance. Capable of intercepting a U2 at 66,000 ft altitude and zoom climbing to 88,000 ft. Also the only fighter that could intercept Concorde from astern at altitude (F-15s, F-16s, F-14s, Mirages and
333.
by mhandley 5y ago
You'd have to consider what actually happens when 50% of your infrastructure goes down. Can the remaining 50% cope with 100% of the load? If not, then you still get a complete failure. So then the question becomes can you reprovisio
334.
by mhandley 5y ago
The problem is a blame culture ensures the near-misses are never reported. Air safety discovered this many years back - a no-blame culture ensures anything safety-related can be reported without fear of repercussions. This allows you to
335.
by mhandley 5y ago
You could easily imagine an EV with a hybrid battery pack consisting of 2/3 Li-Ion and 1/3 Al-Ion. You pay very little in range for the combination compared to a Li_Ion pack, but you gain flexibility. You then discharge the Al-I
336.
by mhandley 5y ago
Or even use an array of size 3, but include the IDs in each element and linearly scan for the right ID. As the whole array will likely fit on a cache line and you want to access all three elements in a short time anyway, this is likely no
337.
by mhandley 5y ago
The bad publicity will probably be mostly confined to the Netherlands. So presumably they'll figure out the expected costs of that, vs the cost to their global business model of 45% reduction in production. Pretty sure which way that
338.
by mhandley 5y ago
So now Shell will presumably move their headquarters out of the Netherlands. Their global emissions will then no longer count as Dutch and as a result they'll comply with the judgement for reducing Dutch emissions.
339.
by mhandley 5y ago
No, the comment in the blog post is not what I'm suggesting. All Apple needs is to do is record the timestamps that iPhones received the AirTag beacon. When an Apple ID queries for keys, if Apple finds more matching key reports recei
340.
by mhandley 5y ago
It's not the number of keys you check - that can indeed be large. It's the number of responses for different keys you receive with recorded receipt timestamps in the same 15 minute interval. If that is greater than 16 (or perhap
341.
by mhandley 5y ago
As there's a limit of 16 AirTags per Apple ID, and each AirTag's keys rotate every 15 minutes, presumably Apple can detect if anyone is abusing the system by sending more than 16 different "messages" per 15 minutes. They
342.
by mhandley 5y ago
That's true, but you can always add the reverse circle as a second example, and then it's happy with either.
343.
by mhandley 5y ago
One other possibility is that the camera was positioned in the correct place, but was angled slightly to the left with respect to the line, rather than being exactly parallel with the line. I don't know how they set up these cameras
344.
by mhandley 5y ago
From figure 6 in the paper, it looks like you get the win for anything from 30 degrees angle upwards. But with 0 degrees angle, the turbines seem to interfere, and you get something like 50% loss. So with a westerly prevailing wind (from
345.
by mhandley 6y ago
Well, if you want to argue from a theoretical point of view, the fundamental constant determining the CSMA-CA slot length is the speed of light within reception range, which is effectively constant, and the requirement to demodulate the car
346.
by mhandley 6y ago
That's not quite true with CSMA-CA. The minimum medium aquisition time is effectively a constant, no matter the bandwidth. Wider channels mean you've got the same duration of deadtime across more channel bandwidth for each transm
347.
by mhandley 6y ago
Duh, you're correct of course. The 3 on the y-axis looked like a 1 to me on the fuzzy image.
348.
by mhandley 6y ago
So how high did it actually fly? I think they said 3 metres on the webcast, and it looked something like that on the video. But the altimeter graph says 1m. Edit: I can't read. Ignore me.
349.
by mhandley 6y ago
I'm a longtime Firefox user, but I only found out about compact mode from the discussion on HN when it was first announced it would be removed. I've been using it since and really like it. Can't help wondering whether many m
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by mhandley 6y ago
There's also this view which has been online for a while: https://www.youtube.com/watch?v=BA-9QzIcr3c So nice to have a live view of a volcano on my second screen while working and watch it change from day to day.
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Covid: The bus journey that saved hundreds of thousands of lives(bbc.co.uk)
2 points by mhandley 6y ago|0 comments
352.
by mhandley 6y ago
Thanks for pointing that out! Still, his comment here doesn't quite match the article and certainly confused me. Is he now suggesting: void foo(char[] a) instead of what he originally proposed, which is: void foo(char a[..
353.
by mhandley 6y ago
The article you reference actually proposes new syntax: void foo(char a[..]) for passing an array pointer and length, and to eventually deprecate: void foo(char a[]) Personally I like this suggestion, but as the article is 12
354.
by mhandley 6y ago
And you're probably limited to fission or fusion power sources if you want enough power to achieve high enough thrust for crewed spaceflight with one of these drives. Problem then is getting rid of the waste heat - you'll almost
355.
by mhandley 6y ago
Do you mean this animation? https://youtu.be/m05abdGSOxY
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Google threatens to withdraw search engine from Australia(bbc.co.uk)
18 points by mhandley 6y ago|9 comments
357.
by mhandley 6y ago
For things that wrap, such as ring buffer indices or packet sequence numbers in a fixed-size field or clocks (hour of the day, minutes in an hour), zero-based indexing is simple modular arithmetic. Wrapping of one-based indices can of cour
358.
by mhandley 6y ago
Indeed, which in turn is an espected outcome if the engine is running oxygen rich, and hence much hotter than the design point. Pretty likely the low fuel tank pressure was the cause of this, and I'm sure SpaceX will have the telemetr
359.
by mhandley 6y ago
Back in 1982 or so, when I was 15 or 16, my school was throwing out an ASR33, so I appropriated it. I had a Jupiter Ace microcomputer, whose claim to fame was that it was programmed in Forth rather than Basic. Great little machine, commerc
360.
by mhandley 6y ago
The vaccine is not available privately in the UK. If you're not registered with the NHS, you're probably not going to be able to get vaccinated in the UK anytime soon. Even if you are registered, you will probably have to wait t

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