mhandley

40 ms·

361.
by mhandley 6y ago
These issues are discussed in the report - see pages 28/29 for example. Another approach discussed in the context of transport fuels is to use ammonia as an effective storage medium for hydrogen - cracking ammonia back to hydrogen bef
362.
by mhandley 6y ago
One thing the article misses is that green hydrogen may in many cases be better used as the feedstock for other products such as green ammonia. Other than its use in fertilizer, ammonia can also be burned as a fuel. Using green ammonia as
363.
by mhandley 6y ago
500MJ is enough energy to flash-boil 200Kg of water, so that might work. Would be a sizeable steam explosion, as the 330 or so cubic meters of instantaneously created steam tries to go somewhere, and an interesting pressure wave in the wat
364.
by mhandley 6y ago
Exactly - the energy of the released counterweight will inevitably produce an explosion as it's stopped pretty quickly by something. My question was how big an explosion. The answer is pretty big, but this probably isn't their b
365.
by mhandley 6y ago
I couldn't help wondering what happens to the counterweight. 100kg travelling at 5000mph works out as about 500MJ. For comparison, 1 tonne of TNT is about 4.2GJ, so the energy of the counterweight is about the same as 120kg of TNT.
366.
by mhandley 6y ago
For me, it's not quite so simple as that. I will vaccinate my children, partly to protect them (though the risk to them is low, as you say), but mostly to protect me and my wife, and more importantly our elderly parents. None of the
367.
by mhandley 6y ago
Wouldn't you need to draw the convex octagon on the inside surface of the sphere?
368.
by mhandley 6y ago
Well, unless you're over 75, you probably won't be offered it for quite a long time. For that age group, the chances of dying of covid are far higher than the risks from the vaccine, to the degree of precision we know from the ph
369.
by mhandley 6y ago
It's worth noting that Rolls Royce does have quite a bit of experience with operational small reactors in nuclear submarines: https://en.wikipedia.org/wiki/Rolls-Royce_PWR
370.
by mhandley 6y ago
I did the inverse - just stopped having lunch - and that works for me. I also don't feel hungry. For me, lunch was usually some low quality food grabbed in a hurry, and so it was the easiest meal to cut out. But the main reason to cu
371.
by mhandley 6y ago
It's also because the only way you know your vaccine works is if more people in the placebo group get the disease than in the vaccine group, for the appropriate measure of statistical significance. If you test two effective vaccines a
372.
by mhandley 6y ago
You can use Chrome to download from Youtube - you just need to know the temporary URL. One way to get this is to play the Youtube video in VLC - the media information window will tell you the temporary URL, and then you can use Chrome to d
373.
One in 20 people likely to suffer from ‘Long Covid’, but who are they?(covid.joinzoe.com)
1 points by mhandley 6y ago|0 comments
374.
by mhandley 6y ago
Could they not license the use of the name, under a contract that imposes certain conditions to avoid confusion, for a small price (say 1p), and not have to worry about losing either the trademark or valued members of the community?
375.
by mhandley 6y ago
The article states that it is not known where in the country was affected, but I think we can deduce that. Here are the daily cases by specimen date. Dotted line is Saturday's data, solid line is Sunday's. The difference betwee
376.
by mhandley 6y ago
The full wording is "Any provision directly contracted or arranged internet transit or peering services enabling the function or optimization of the mobile application within the U.S.;" I've written my own BGP implementation
377.
Boeing Dreamliner: A Manufacturing Nightmare(seekingalpha.com)
3 points by mhandley 6y ago|0 comments
378.
by mhandley 6y ago
This vaccine was developed by Oxford University. AstraZeneca stepped in to produce it rapidly. They don't normally produce vaccines at all, but they do have very capable production facilities and people. In this case they committed
379.
by mhandley 6y ago
This article misses the important piece of information that AstraZeneca is producing this vaccine at cost . They're already taking a large financial risk up front by scaling up production in advance for a vaccine that may not pass st
380.
by mhandley 6y ago
Rockets use liquid hydrogen, which is a pain to work with, but not too bad if you can fuel up and launch relatively quickly before too much boils off. The real reason rockets use hydrogen is because Hydrogen and Oxygen gives the highest sp
381.
by mhandley 6y ago
Part of it is surely fear of missing out, in this case fear that everyone else will know something you don't. Exactly what we fear of missing out on probably varies a lot from person to person. I don't care all all about the foo
382.
by mhandley 6y ago
I don't think we're going to have any idea which strategies actually worked for another year or so. If there's a large second wave this winter in other countries, and Sweden doesn't suffer from that due to immunity alre
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by mhandley 6y ago
The article does touch on this: "New restrictions will also apply to use of the company's broadband kit. Operators are being told they should "transition away" from purchasing new Huawei equipment for use in full-fibr
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by mhandley 6y ago
From the fact that you've been modded down, it seems the author wasn't the only one to forget the TU144.
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by mhandley 6y ago
It's not an IETF document - it's an independently submitted Internet draft that hasn't been adopted by any IETF working group at this stage. Anyone can write an internet draft. Getting concensus on it is the hard part.
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by mhandley 6y ago
Dexamethasone decreases deaths of ventilated cases by a third: https://www.recoverytrial.net/files/recovery_dexamethasone_s...
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by mhandley 6y ago
That number is for mean, not median, so it rather misses the point.
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by mhandley 6y ago
If you also factored in healthcare and education costs (including university), I suspect the US would rank lower than that.
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by mhandley 6y ago
I think there's a real risk of complacency. Computer Science is for the most part quite a diverse community, both here in the UK and in the US, and I love that. But there are groups who are very underepresented. In my CS classes i
390.
by mhandley 6y ago
I fear that HN folks have got tired of this topic, but this is really well written and it made me think.

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