mhandley

51 ms·

571.
by mhandley 7y ago
And something like $300 per kg for Starship (on the assumption of roughly $30M for a fully reusable launch - Musk says it should be cheaper than F9 per launch - and 100 tonnes to LEO) if they're successful in minimizing refurbishment b
572.
by mhandley 7y ago
To use microwave inter-satellite links, SpaceX would have needed to file for frequency allocations. As far as I know, they have not done so - they only have frequency allocations requested (and approved) by the FCC for the up and downlinks
573.
by mhandley 7y ago
In some part, what you're seeing on the demand side is underestimated during the day, due to solar not being centrally metered, and offsetting some of the true demand. As the mouseover on the solar gauge says, you can see this in the d
574.
SpaceX to launch “dozens” of Starlink satellites May 15, more launches to follow(spacenews.com)
1 points by mhandley 7y ago|0 comments
575.
by mhandley 7y ago
Actually "life" isn't going to be just fine - we're going to lose a lot of biodiversity along the way too, and the less we do to prevent warming, the more we'll lose. But my question wasn't about the big pictu
576.
by mhandley 7y ago
I'm a little confused on this issue. How did all that carbon end up in the permafrost soils in the first place? Presumably because the climate was warmer, and vegetation grew and locked up carbon there. So now the climate there is w
577.
by mhandley 8y ago
It would be great to make this legal again today. With the current fuel restrictions, you couldn't use it a lot or you'd run out of fuel, so you'd have to save it for when you really needed it. Anything that allows a bit mo
578.
Form of dementia that ‘mimics’ Alzheimer's symptoms discovered(theguardian.com)
43 points by mhandley 8y ago|0 comments
579.
by mhandley 8y ago
What you really want to know is what the marginal carbon intensity is. In other words, if I add demand now, what form of generation will supply that additional demand? This is somewhat different from what the current mean carbon intensi
580.
Diesel is not better for the environment than electric(innovationorigins.com)
84 points by mhandley 8y ago|111 comments
581.
Facing sharp questions, Boeing CEO refuses to admit flaws in 737 MAX design(seattletimes.com)
5 points by mhandley 8y ago|0 comments
582.
by mhandley 8y ago
Agreed - wasn't disputing that. All I was saying was that maybe us meat eaters who want to be slightly more healthy and slightly better for the environment are actually the target market.
583.
by mhandley 8y ago
Are vegetarians the target for this? I wouldn't have thought you'd find too many of them in Burger King. I'm not a vegetarian, and do like a burger occasionally. On those rare occasions (usually on long journeys) when I do
584.
by mhandley 8y ago
And it's recently emerged that the AoA sensor misread itself may have been Boeing's fault, and due to foreign object damage to wiring: https://interestingengineering.com/boeing-whistleblowers-rep... Boeing also ha
585.
by mhandley 8y ago
From the article: In the centre, at Lujiazui, the city has given up on the street level entirely and created a huge, circular, above-grade walkway accessible by escalator and connecting to all surrounding buildings. But that's probab
586.
by mhandley 8y ago
It won't just be the FAA that signs off on the Max this time - the review process is to be a collaborative international one. In part, this probably indicates how much the FAA's credibility has been damaged by the 737 Max: https
587.
by mhandley 8y ago
The wedge work did pretty much this - it allowed multiple page tables to be used within one process, and memory tags indicated which regions should be accessible to each "sthread". In this case, an sthread would run the JITed unt
588.
by mhandley 8y ago
The article discusses why this is insufficient.
589.
by mhandley 8y ago
From their abstract: As a result of our work, we now believe that speculative vulnerabilities on today’s hardware defeat all language-enforced confidentiality with no known comprehensive software mitigations, as we have discovered that unt
590.
by mhandley 8y ago
Geostationary satellites have high latency because they're so far up (36000 km). But dense low earth orbit satellite constellations can give lower latency than fibre over longer distances if you relay from satellite to satellite, beca
591.
by mhandley 8y ago
I never said any such thing. They'll still get takedown notices after 6 months, and they'll have to fight them as appropriate. It's just they won't be inviting abuse by people wanting to use them as a free CDN in the w
592.
by mhandley 8y ago
The purpose of the Internet archive is to maintain history, and they are a really great resource. To do this though, they don't really need to make current content live - they could just as well have a 6-month embargo between archiv
593.
by mhandley 8y ago
Nice video capturing the sonic booms from the booster landings here: https://twitter.com/jefffwilliams/status/1116486329284595717
594.
by mhandley 8y ago
But if repeatedly looking in the mirror actually causes you to become more vain, or develop body dysmorphic disorder, then the mirror itself might not be entirely healthy. Cause and effect in societal matters are complex; there are usually
595.
by mhandley 8y ago
I was talking with someone who runs a large wind power company. I'd assumed that the best place for storage was close to the consumers, but what I'd missed is that the grid itself is often the limiting factor. If you put batteri
596.
by mhandley 8y ago
You are, of course, correct. I've not heard anything about whether lift from the nacelles on the Max could be more of an issue than on older 737s in such circumstances. Perhaps it's not an issue at low airspeeds? Would be inter
597.
by mhandley 8y ago
As far as I know, MCAS has never activated in service due to actual high AoA. However, even the 737 classic could have "interesting" pitch up characteristics: "The Boeing 737-300 was on approach to Bournemouth Airport follo
598.
by mhandley 8y ago
When they did that final electric trim up, the right (more reliable) ASI indicates 365 knots. VMO is 340, so they were already in real trouble. It's not at all clear that even electric trim could overcome the air loads at that point
599.
by mhandley 8y ago
Preliminary report is here: http://www.ecaa.gov.et/documents/20435/0/Preliminary+Report+... Looks like the pilots did everything right initially, but then discovered they couldn't manually trim up, presu
600.
by mhandley 8y ago
Official report is now out: http://www.ecaa.gov.et/documents/20435/0/Preliminary+Report+... This scenario does indeed appear to be what happened. It just looks like when they re-enabled electric trim, they d

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