Guess you don't live in a cold part of the world in the winter, or where it can hit 35C+ in the summer. Around here in Canada, we use 30-50m segments that aren't welded because the tracks shrink and expand so much. Once the temps drop to -20C here, you can lose over an 3cm, and once it gets over 35C with the train's on them they can expand over 10cm causing them to warp off the bed.
Then that's a cheap bed and rail mounting, there's no technical reason for it.
I do live where it routinely gets over 30C, and -20C isn't unheard of (we hit it
two winters ago, and -12C was just last week) - and all rail on main lines is welded.
The expansion and contraction forces are completely dissipated by proper
mounting to the sleepers and go into the ballast, even at those temperatures.
Welding itself can only happen during "neutral" temperatures though, somewhere around 2C
Also: really, slashdot, no degree sign - not even using the HTML entity?
They never said "land at the same place".
Yes they did. Landing at the launch site is the planned final goal.
You're actually incorrect. There's enough radiation to lock up computers in low earth orbit, including on board the ISS.
Not really, no. They run quite a lot of unmodified, off-the shelf, near-current-generation laptops on the ISS
(most new crews bring a couple of laptops and leave most of them them there, while only broken ones are
put in the "garbage trucks"). They don't run any worse than on the ground.
True, none of those is mission-critical as in "a failure will kill the crew", but some are experiment-result-critical.
The people designing the experiments apparently are fine with that, so it can't be that bad.
. At least then the Saturn V launch rocket was being tested as well.
The early Apollo test missions were on a Saturn 1B
Yup. That's what I consider one of the craziest/most amazing aspects of the crazy-stuff-rich
whole Apollo program: The final Saturn V configuration (S-IC + S-II + S-IVB) had only two
unmanned test flight - in the form of full orbital missions, Apollo 4 and Apollo 6 (Apollo 4 was
also the very first flight for both S-IC and S-II). Both missions were complete successes
(and led to the discovery of lots of problems, including the famous "pogo oscillations").
There were plans for a third unmanned Saturn V launch, but they were running out of time, and
more importantly, out of Saturn Vs, so it was decided to make that launch Apollo 8 instead - the
first manned flight around the moon.
Nobody was really sure this would work...
Not a single Saturn V ever failed in a mission-critical way (Apollo 13 was a service module poblem).
Start alphabetically, and with a long list of random names (take randomly from US+other census data, or other large pools), and each successive vulernbility gets the next name from the list, no exceptions.
Not only did this work for hurricanes, this is actually how the US Government has decided on operation names for a while: How the US Army choses operation names
You should read the articles you link to. They used to use random names, but they don't anymore, for PR reasons.
"Just Cause", "Desert Shield", "Provide Comfort", "Northern Watch", "Desert Fox", "Desert Freedom", "Desert Storm", "Iraqi Freedom", "Enduring Freedom",
Really not that random.
I just get basic APC UPSs and I've never had one cause me a moment's trouble. [...] You just have to test on occasion and replace batteries as needed because they WILL fail silently -- if the battery is dead, you won't know until the power goes out and your machine goes down.
That's what apcupsd is for. Acceptably easy to configure, and then it just works.
It'll warn you if the self-test considers the batteries too old and due for replacement.
Also, it'll do a controlled shutdown if the power is out for too long and the UPS is running
low - a feature I've tested but never needed, thanks to a slight UPS capacity overprovisioning.
The deficit they're talking about is around 1% to 2% of the annual production.
Right now, yes. The deficit they are talking about is 25%-50% of the annual production.
I can't see this working for more than a handful of years even under the assumption of large
stockpiles - "rolling reserves" attenuate the problem of age, but not the one of consumption.
I can imagine demand rising a lot, but unless there are huge cocoa reserves
somewhere (which I doubt in the case of a perishable) in the order of multiple
yearly harvests (global production seems to be somewhere around four million
tonnes), I can't see how this demand is going to be met with actual chocolate.
Pacemakers don't use RTGs, they use non-thermal radioisotope generators, like betavoltaics that harvest the current created by escaping beta particles.
That's only true for the Promethium-powered ones with a Betacel unit. I think the number of
actual thermoelectric ones still "in the wild" using Plutonium is about the same.
He's not in England. He's in Ecuador.
No he isn't. He is in the Ecuadorian embassy, in London, England.
The embassy is their sovereign soil, by international treaty.
If the English police set foot in there to deport him to Sweden (as they would do if he left), that's an invastion of their territory.
No it isn't.
It would break a very important international treaty though, and likely
lead to lots of diplomatic problems.
Do you mean a 100kW/hr battery? There is no such thing as a 100kW battery. Idiot.
Neither is there a 100kW/hr battery. Moron.
replace Herz, [...] with a more english ideal; cycles-per-second (so much for brevity).
This one is a false near-cognate: The cycles-per-second unit is "Hertz", as in Heinrich, not as in heart.
That still makes it German though...
Do you even know how this case of infection occurred?
I don't. You, however, speculated about contaminated suits which "still have to
be taken on and off, and that's when health workers seem to get infected."
Which really shouldn't happen.
you're the one who says he knows, or rather knows enough to know there was a systemic problem and not one merely attributable to failure to follow established protocols.
Please tell me where I said that.
Huh? Plane flights? Are we still talking about a controlled clinical environment in a big American city?
There are only about a dozen BSL-4 facilities in the US; if you want to establish the principle that patients must be treated in such a facility, you will be moving A LOT of them.
1.) I don't. My video example above was meant as a "look at how the pros do it".
2.) You do expect "A LOT" of Ebola patients in the US?
you seem to think every metro in the US has a world-class biohazard facility and infrastructure, and has plenty to spare on a wild goose chase of isolating minimally-virulent ebola patients, and you can't seem to understand that your fears are based completely on your own speculation and snap judgement. Your conceptualization of this disease, and the means required to contain it, constitute the textbook definition of cargo cult science.
Hm? What part of "don't mix clean and unclean environments" is cargo cult?
Also: I'm not afraid.
Just to clarify: I'm not talking about the Ebola outbreak as such, and arbitrary
patients. I'm talking about this one specific case of an infected health worker in
a proper clinical environment.