mhandley

62 ms·

721.
by mhandley 9y ago
It should be better than submarine fibre for longer distances. The satellites will be in low earth orbit, and the constellation will be dense enough that routing ought to be pretty direct. You only get about 2/3 c in glass, compared
722.
by mhandley 9y ago
For Gardiner's corner, I think you're looking the wrong direction. The entrance to commercial road has moved, but you should be looking this way: https://www.google.be/maps/@51.5151995,-0.0716539,3a,75y,88...
723.
by mhandley 9y ago
When it comes to email address normalization, it sounds like we could do with a standardized way for a domain to express normalization policies. Could be as simple as publishing a set of regular expression subsitution rules, specifying (for
724.
by mhandley 9y ago
The problem is that jo.elane@example.com and joe.lane@example.com can be different people, or jan.eton@example.com and jane.ton@example.com. On gmail, they can't, but on my university email system for example, this is the default nam
725.
by mhandley 9y ago
It has a huge great rocket engine and fuel tanks attached. Does it still qualify as "production" with that minor modification?
726.
by mhandley 9y ago
Odd that it doesn't mention the Falcon 9 stage 2 that the Tesla is still attached to. That's much larger than the Tesla itself, so you'd have thought it worth mentioning.
727.
by mhandley 9y ago
In the UK, up and down are terms used by the railways. The up line generally heads towards a big city (London for much of the UK), and down heads away. Seems like this is the case in some other countries too: https://en.wikiped
728.
by mhandley 9y ago
There are two other reasons which SpaceX has mentioned before: - When you're landing a rocket, you need to be able to throttle down quite low. Even a single Merlin 1-D engine, throttled down, is too much thrust to be able to hover wit
729.
by mhandley 9y ago
Anything on the path between the endpoints that looks at layers above IP. Obvious examples are NATs, firewalls, transparent proxies, traffic normalizers, so-called protocol accelerators. Some boxes I've no idea what they do. Take a
730.
by mhandley 9y ago
Yes, we were surprised by just how prevalent middleboxes were that didn't like gaps in sequence spaces. This significantly influenced the design options for MPTCP. Another problem is that TCP is a bytestream protocol. Apps that strea
731.
by mhandley 9y ago
Agreed. Human racers hang off the bike while cornering, so the bike itself doesn't need to lean so far. This keeps the suspension geometry within a more reasonable range, and keeps a larger contact patch between the tyres and the tra
732.
by mhandley 9y ago
The problem is that spectulative execution is fundamental to performance in systems that have conditionals. With memory latencies being ~100ns, and a 3GHz core, you waste 300 cycles every time you need to load the conditional from RAM, and
733.
by mhandley 9y ago
Which CPU vendor would you switch to? Although Meltdown is (mostly) an Intel bug, all the main CPU vendors, including AMD and ARM, are affected by Spectre, which is what this particular discussion is about.
734.
by mhandley 9y ago
There are many difference between a glide-back booster like the Baikal, and a Falcon 9 first stage. Baikal would not only need wings and other aerodynamic surfaces, but also was supposed to contain a jet engine. However, perhaps more impor
735.
by mhandley 9y ago
Being young is often an advantage when finding something really elusive that is obvious with hindsight - I think Meltdown and at least Spectre 1 fall in this category. When you're older, you get influenced more by how things are meant
736.
by mhandley 9y ago
In section 5.2 of Bernstein's paper, he discusses isolating single-source transformations. His example is locking down jpegtopnm using standard Unix mechanisms so it can only read stdin and write stdout and do absolutely nothing else.
737.
by mhandley 9y ago
Interesting, I hadn't heard about that before, but here's a link to an article about it: https://www.defenceaviation.com/2011/05/stealth-uh-60-black-...
738.
by mhandley 9y ago
The article isn't clear, but I'd guess from the small outbreak in 2016 after being Polio-free in 2014/15 that the concern is that polio still isn't completely eliminated in Nigeria. Presumably it will need ongoing monit
739.
by mhandley 9y ago
Not to mention that the central office is in the US, and this seems to be used to lock/wipe computers in other countries, so much harder to prosecute them. However, if the person alerting the central office can be shown to have known
740.
by mhandley 9y ago
I'm the same. Also been staring at computer screens since 1982, with no obvious problems. Getting old is annoying though: my arms are now not quite long enough to focus perfectly on my phone screen without my reading glasses, but a
741.
Hypersonic aircraft hypotheses getting real(avweb.com)
1 points by mhandley 9y ago|0 comments
742.
by mhandley 9y ago
Likely that influence comes from when India was part of the British Empire. Lots of Indian-derived words made it into British English.
743.
by mhandley 9y ago
All F9 engines are gimballed. The center engines can gimbal further though, for extra control authority when landing. The many smaller engines approach is useful for re-using boosters. When coming back in to land, the stage is almost empt
744.
by mhandley 9y ago
The titanium grid fins are also larger, which gives them better control authority. The center booster (like regular Falcon 9s) carries the interstage. This is light weight, but has significant aerodynamic effect when re-entering engines f
745.
by mhandley 9y ago
This paper should probably be read in conjunction with Google's QUIC paper from Sigcomm 2017, which provides quite a bit more detail about the protocol and its design decisions: https://research.google.com/pubs/arc
746.
by mhandley 9y ago
I can't reproduce it on El Capitan. Doesn't prove others can't, but I'm pretty sure Apple would patch it on El Capitan too if the bug was that old - they issued other security patches less than a month ago.
747.
by mhandley 9y ago
One of my Macs is showing a root password change date of Nov 10th 2017. I can't explain that, so I'm reinstalling now. It did have sshd enabled and remotely accessible, though I thought root login was prohibited. If I understood
748.
by mhandley 9y ago
Of course you're correct, and this is why such a question only forms a part of such an interview. I'm much more interested in what someone has built. We'll have a good discussion about any software they've built, and w
749.
by mhandley 9y ago
Whether it is a good or a bad interview question depends on how you use it. I've used a variant of this when interviewing CS PhD candidates. I don't expect anyone to know how to solve this immediately. If anyone did, I'd a
750.
by mhandley 9y ago
In the UK, around a fifth of mortgages are interest-only, which I guess is effectively an infinite-term mortgage. In comparison, at least you're paying some part of the capital back on a 100 year mortgage. Of course, both are storing

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