mhandley

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451.
by mhandley 7y ago
I posted this because I haven't heard much about ammonia being used as both a fuel and an energy store for renewable energy. The full report goes into much more detail: https://royalsociety.org/-/media/policy
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Ammonia: Zero-carbon fertiliser, fuel and energy store(royalsociety.org)
3 points by mhandley 7y ago|1 comments
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by mhandley 7y ago
Pretty soon I think there will be a market for CCTV cameras that use a tamper-proof module to sign the video output, with a unique key and a key chain back to the manufacturer. Video evidence simply won't be admissible unless it'
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by mhandley 7y ago
They don't dump fuel, except when they need to land in an emergency and don't want to risk landing overweight. This is a tiny fraction of the greenhouse effect caused by aviation, so taxing it wouldn't make any real differen
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by mhandley 7y ago
We should mandate that aviation fuel is 10% carbon neutral. And then steadily up that fraction yearly. How they satisfy that is up to them - synthetic fuels generated using solar/wind, biofuels, or whatever. The point is that we&#x2
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by mhandley 7y ago
But is it still running on Cern/3.0, installed circa 1993. Ours is: $ nc www0.cs.ucl.ac.uk 80 HEAD /staff/m.handley/ HTTP/1.0 HTTP/1.0 200 Document follows MIME-Version: 1.0 Se
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by mhandley 7y ago
As a UK citizen, my general assumption is that the systems security of all telco equipment and the operational security of all telcos is so poor that both the US and China can covertly access our networks, no matter who made the equipment.
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by mhandley 7y ago
According to amazon.ca, the granola costs $63 and the box of boxes only costs $29. I really hope the granola company is buying as many boxes of boxes from Amazon as they can! Free money!
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by mhandley 7y ago
Part of the problem is the low voltage conventional third rail systems use. In the UK, third rail voltage is 750V, compared to 25kV for overhead lines, so third rail currents get pretty high. You already get get pretty good arcs when the
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by mhandley 7y ago
From Caltech's Spitzer web pages: Spitzer orbits the Sun on a path similar to Earth's but moves slightly slower. Today it trails about 158 million miles (254 million kilometers) behind our planet - more than 600 times the distanc
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by mhandley 7y ago
But that's an RFC, so it carries (very slightly) more weight than an Internet Draft. In the real world, what matters is whether it's implemented: https://www.blug.linux.no/rfc1149/writeup/
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by mhandley 7y ago
I wonder how long until enough petrol stations have closed that fueling petrol or diesel cars becomes difficult? If hydrogen cars become commonplace, then the conventional petrol station will likely survive, but if new sales are all batter
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by mhandley 7y ago
GridWatch is another great site that presents the same data, plus also data for France: http://www.gridwatch.templar.co.uk/index.php
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by mhandley 7y ago
Right now, the UK is getting 7% of its electricity from burning biomass, primarily woodchips. CO2 capture there seems eminently doable, as a source for methanization of hydrogen. It seems unlikely that hydrogen will be a viable fuel for co
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by mhandley 7y ago
Don't forget we've spent a lifetime learning and perfecting the use of things like body language in face-to-face meetings. You can't just switch to video conferences and expect it to be flawless without practice. But if you
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by mhandley 7y ago
HN discussion is here: https://news.ycombinator.com/item?id=22073796
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by mhandley 7y ago
Just to update with the latest statistics, since 29th Jan, up to 30th Jan 9:30pm EST, for rest of world outside Hubei, there have now been 1 death and 33 recovered. So the trend seems to be that the death rate (calculated as deaths/re
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by mhandley 7y ago
Surely all current cases have experienced roughly the same number of viral generations? A death outside Hubei today will be caused by a virus with roughly the same number of generations as a death inside Hubei. Yet a smaller fraction seem
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by mhandley 7y ago
Glad it's not just me that cannot visualize faces whatsoever! But with the exception of faces, I can visualize complex 3d shapes if I'm lucid dreaming. When I'm fully awake, my visualization abilities decrease quite a bit,
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by mhandley 7y ago
One other observation, for what it's worth. According to the John Hopkins site, between 29th Jan and 30th Jan updates (that's the data I happen to have access to), we have worldwide: * 29th: deaths 133, recovered 126 * 30th: deat
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by mhandley 7y ago
The rates for Chinese provinces except for Hubei seem inconsistent with 20-56% mortality too. The ten provinces outside Hubei that have the most confirmed infections are: * Zhejiang: 428 confirmed; 0 deaths; 4 recovered * Guangdong: 354 co
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by mhandley 7y ago
With faces, it's odd. When I go to visualize someone, I kind of get a fleeting glimpse, and then it fades and I can't make out anything except, somewhat blurred, their hairline. No face at all. I'm pretty sure I know exact
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by mhandley 7y ago
I think there are also two types of people when it comes to navigating. One type gives and understands directions along the lines of "go along this street until you pass the Red Lion pub, then turn right. After 50 metres, turn left&q
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by mhandley 7y ago
I'm a very visual person, but I can't visualize faces at all. I have no problem remembering faces, but I can't visualize them. When I'm fully awake, I can sort of visualize other things, but it's never perfectly c
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by mhandley 7y ago
Indeed, and I mention microwave links in the paper linked above. But those are relatively short distance: New York - Chicago, London-Frankfurt, and similar. Where Starlink and Kuiper can provide real latency benefits is on long distance pa
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by mhandley 7y ago
These first satellites don't have the free-space lasers I modelled in that paper, but my simulations show they can still beat fibre on many paths without inter-satellite links, by relaying via groundstations: https://youtu.b
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by mhandley 7y ago
Things are likely more complicated while Starlink satellites are maneuvering between orbits (as was the case with Aeolus) than when they're established in their orbits. In addition, as with aircraft collision avoidance, it's real
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by mhandley 7y ago
Actually we've made huge progress in stemming growth. Fertility rates in most of the world have been falling, and in most developed nations are now below replacement levels. The big exception is Africa: https://en.wikipedi
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by mhandley 7y ago
I read though all these emails and chat messages when they were first released. I'm pretty sure that those particular email quotes were from people working on developing the 737 Max simulator , not the aircraft itself. So maybe the 7
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Incident: Ethiopian B737 at Dire Dawa on Jan 9th, swarm of grasshoppers(avherald.com)
188 points by mhandley 7y ago|85 comments

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