mhandley

14 ms·

121.
by mhandley 2y ago
Yes, on the last flight both the first and second stages had no problems with the engines on ascent. If this were a Saturn V booster, it would have been a complete success. They did suffer failures with booster recovery, and with the RCS
122.
by mhandley 2y ago
I remember Van Jacobson saying in the early 90s that IP would work over two tin cans and a piece of wet string. For several years, I set this as a possible student project, partly as a joke, but it was had no takers for quite a few years.
123.
by mhandley 2y ago
First time I've ever seen the aurora from West London - I always assumed the light polution would make it impossible to see, but here's a picture I took of it over the Thames: https://twitter.com/MarkJHandley&#x2F
124.
by mhandley 2y ago
If the article is correct and it's a 737-300, then it's a very old plane built long before the recent Boeing issues.
125.
by mhandley 2y ago
I upgraded the UCL CS webserver to CERN/3.0 (the last CERN httpd release) running on a Sun Sparcstation 10 back in 1994, and it has been in production use ever since. The hardware got replaced at least once (our sysadmin has a large p
126.
by mhandley 2y ago
As renewables started to increase, people were saying it wouldn't be possible to keep the grid stable once renewables reached 50%, due to the lack of spinning mass in fossil generators. That obviously has been proven wrong. If I unde
127.
by mhandley 2y ago
Before we finalized the specs we did a lot of testing to make sure that enabling MPTCP wouldn't break connectivity. Either it would be passed correctly, or it would fall back to single-path TCP safely. Generally, so long as a middleb
128.
by mhandley 3y ago
I have a hard time visualizing things when I'm fully awake. Ask me to picture my wife or my kids' faces, and I can't do it. I feel I can subconsiously visualize them with no problem, but as soon as a try to consciously do it
129.
by mhandley 3y ago
I'm like you - my mum and her sister were both infamously bad at navigation, and family stories tell how they got lost driving home from the city centre. Eventually they paid attention to two-year old me standing up in the back seat
130.
by mhandley 3y ago
It's not like it cannot be done - all London taxis are required to be wheelchair accessible. But it does require political will. https://levc.com/technology/accessibility/
131.
by mhandley 3y ago
Perhaps the BMW i4? https://www.bmwusa.com/vehicles/all-electric/i4/gran-coupe/o...
132.
by mhandley 3y ago
Dry sand has a mass of 1600kg/m^3 Potential energy, U = mgh. So the energy required to raise 1m^3 of sand 1400m is 1600 x 1400 x 9.8 = 22MJ = 6.1kWh I've no idea how large their mine galleries are, but lets say they're 3m wid
133.
by mhandley 3y ago
The paper from this article says that only 450kg of charged material from meteorites enters the relevant part of the atmosphere each year. Yet the total amount of meteorites entering is somewhere in the range of 10^7 to 10^9kg per year [0]
134.
by mhandley 3y ago
Even us righties need to use scissors in the left hand occasionally, such as when trimming the finger nails on the right hand. At least with nail scissors, the trick is to flip the scissors around so they point towards you rather than away
135.
by mhandley 3y ago
And also using unused telco dark fiber to listen to earthquakes in Iceland. Live video feed here: https://www.youtube.com/live/1_3NBuVrmCs?feature=shared
136.
by mhandley 3y ago
For those who have never had the oportunity to learn of the marvels of the Turbo Encabulator: https://www.youtube.com/watch?v=Ac7G7xOG2Ag
137.
by mhandley 3y ago
I believe the shuttles used five computers - four ran the same software and voted if there was a discrepency, whereas the fifth ran simpler independently developed software in case a common bug rendered all four primary computers inoperable
138.
by mhandley 3y ago
I don't think we're losing knowledge of how the Internet works, but we're almost certainly losing knowledge of why it was done that way. I remember Bob Braden saying (and I paraphrase): "When we designed the early I
139.
by mhandley 3y ago
I met Dave a few times in the 90s, first when he was visiting Peter Kirstein at UCL. I'd taken network time as simple to get right until that evening chatting with him in the pub. Fascinating discussion of what can go wrong - and a l
140.
by mhandley 3y ago
Agreed, if there's no latency cost and no cost to maintaining the queue. But if your queue is never emptying, you've hit an equilibrium where you're persistently overloaded and constantly load shedding. In that case you c
141.
by mhandley 3y ago
What queues do is smooth out the mismatch between supply and demand. If the mismatch lasts long enough, the queue will overflow, and then you need to load shed (and you need to plan for what the least bad way of load shedding is). But que
142.
Helios, a new class of space tug with some real muscle(arstechnica.com)
5 points by mhandley 3y ago|0 comments
143.
by mhandley 3y ago
Maybe they could use the fans primarily when in very shallow water or on the beach, and lower a water-jet propulsion pod on a fin for when they're in deeper water. Likely this would be significantly more efficient overall, even taking
144.
Neptune and Uranus seen in true colours for first time(bbc.co.uk)
1 points by mhandley 3y ago|0 comments
145.
by mhandley 3y ago
Interesting from that link that concorde could use in-flight reverse thrust to achieve an increased rate of descent. I wonder if this was regularly used, or only so concorde could descend rapidly enough from cruise altitude if they lost ca
146.
by mhandley 3y ago
I think it's not so much a question of deliberate overspeccing, but more that each of these missions is its own prototype. You're asked to design something to do a small part of the task, but you won't get a chance to try ag
147.
OpenAI is nothing without its people(twitter.com)
3 points by mhandley 3y ago|0 comments
148.
by mhandley 3y ago
In the last hour they have detected increased levels of SO2 in Grindavik, so they've evacuated residents who were being allowed in to retrieve their valuables: https://www.ruv.is/english/2023-11-10-liveblog-reykjan
149.
by mhandley 3y ago
The only argument I know of that might work on lawmakers is that mandating backdoors to end-to-end encryption puts your own high-tech industrial secrets at high risk from nation-state adversaries. It puts a huge target on that backdoor wit
150.
by mhandley 3y ago
Some quotes: "we did all the right things to win that project, but it was one of those times where you get wound up in winning and sometimes it's a good idea to kind of stop and think just how possible the thing that you were abou

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