In order to demonstrate a 10-minute charge, they intend to take a 350kW feed from the MIT power plant. Presumably 14kV @ 20A, something like that. Their own little substation.
Yes, it's a party trick, but it's a demonstration of the sort of thing that might be possible if you decided to invest in serious charging station infrastructure. (Such a charging station would need major energy storage of some kind, just like your neighborhood gas station has big underground gasoline storage tanks.)
From an engineering economy POV, it's almost certainly better to swap batteries at a battery-swap station than it is to build infrastructure to support 10-minute charge times. But the latter is a lot more fun to play with.
I'd say if it's bandwidth we're after, we shouldn't be reducing the number of signal lines.
Nope, Package pins are expensive, cable connectors are expensive, board traces are expensive, cabling is expensive. On the other hand, silicon is cheap.:-)
A 6gbps serial link is straightforward to implement, if you know what you're doing, and there are probably a couple dozen design groups around the world that can do it.
This posting is anti-insightful.
I bought a tank of gas from a gas station once. It did not take me the "set distance". It took me 1/2 mile and the engine died. Bad gas (water contaminated). I never bought gas there again. The station went out of business not too long thereafter.
Exactly the same for an EV battery-swap business. Load-testing the battery as part of the charging process is straightforward. Any battery-swap business that wants to survive will do that.
There are lots of hard problems to solve for this business to succeed. Avoiding giving your customers bad batteries is easy to solve, not hard.
-Jay-
Palin never made any woman pay for any rape test. No one did. It's all bullshit.
Good job repeating the talking point, but that's a strawman, I'm afraid.
I'm quite sure you're correct that Mayor Palin never sat at her desk stuffing envelopes with bills for post-assault exam/evidence collection kits. She also didn't send out any water bills, right?
It doesn't work that way. It works this way: the city provides the kits to the hospital, or reimburses the hospital on a regular basis.
When the city *stops* doing that (and there is absolutely no disagreement from anyone that the city of Wassila did just that, and that the Mayor signed off on the budget changes that implemented it), then the hospital bills the patient instead.
...to have customs detain you make you wait for an hour while they wander through your laptop, miss your connecting flight, then seize your laptop and return it to you, someday.
That doesn't make me happy at all, but then I live in the United States, where we (used to) have a constitution that protects us from unreasonable search and seizure. Feh.
-Jay-
The problem is that it is not at all obvious that ANY of the activity was "illegal" or unconstitutional.
Oh, yes, of course. The *obvious* reason for legislation to preemptively grant you legal immunity from criminal prosecution is because everything you did was perfectly legal! The logic is brilliant, just brilliant.
Nope, you can bet that all the control connectors in play were gold-plated. Nobody makes them any other way, and certainly not for space use.
Gold plate won't help you if your cable harness and connectors sit there soaking wet, and they won't prevent the boneheaded design decision to build in a single shutdown path for a triple-redundant computing system.
Comparing nuclear power with wind or solar has always seems nonsensical to me.
A nuclear plant provides baseload power. Wind and solar cannot; they are good for marginal reductions in the amount of baseload capacity you need (that's a wonderful thing, but it's not baseload).
Nuclear plants should be compared with coal/oil/hydro, that's apples-to-apples.
-Jay-
Freedom isn't for the faint of heart. I'd like to think my country is the land of the free, and the home of the brave, but judging by the Slashdot response to a college student with a protoytpe board hotglued to a teeshirt, it's apparently the land of the "please big daddy keep me safe", and the home of those willing to surrender their unalienable rights for the illusion of that safety.
Sharepoint is MS's attempt to implement Wiki, plus figure out a way to collaborate on MO documents that's better than just e-mailing 'em around.
The Wiki part is awful. We have Wiki, static, CGI and Sharepoint content around here, and without exception (so far) the Sharepoint content is harder to use and less useful than any of the alternatives.
Dunno anything about the collaboration feature; I guess if you're forced to collaborate on Word docs and Excel spreadsheets for a living, you need something.
-Jay-
By the way, the thing that boggles me about all the mapping services out there is how they do routes: how do they determine where the roads are (DOT?), how do they store the roads, and how do they calculate driving routes (that often appear to take into account traffic speeds).
A company called Navteq does a lot of it, and contracts out data and software.
The New Yorker had a great profile on E-mapping and route finding including a ride-along with a "Ground Truth" team that heads out with their GPS-linked laptop and drives... pretty much everywhere. One key part of ground-truthing (and good directions) is knowing the signage on the route:
Singh bought a Red Bull and took the wheel. Arcari sat in back with the laptop, ready to note any changes in what they called the "geometry" of the roads.
"Whenever you're ready, Shovie," he said.
The first thing the men noticed was a "No Left Turn" sign out of the gas station. "That doesn't go in the database," Arcari said. "That's unofficial geometry, since it pertains to a private enterprise."
so it will be much faster/cheaper to use the electronic records than if you had to manually count each vote by hand.
False dichotomy. Oregon doesn't use touch-screen machines, we use fill-in-the-bubble paper ballots and machine counters. Works great, and much faster during heavy turnout elections (where from an outsider's POV, touch-screen states just never seem to have enough of those glorified PC's around).
Oregon is vote-by-mail also, but that is an orthogonal issue.
All the same source-inspection criteria should apply to ballot-counting machines also; they are, in general, made by the same corporations that make touch-screen machines.
...and hello, I'm from Portland, Oregon, USA, and would be really pleased if you would post a citation.
A taxi company running air-powered vehicles would either need a huge re-fueling infrastructure or an interesting business model (range limited to 5-10 miles), and I think it would be fascinating to see how they're doing it.
Plus it's really strange, because I can find no photographs, no press releases, nothing.
Links in Spanish are fine. Thanks!
Scuba tanks *do* explode, generally while being filled, caused by a combination of fatigue, corrosion, and manufacturing defects. You don't want to be around when it happens. Google for scuba tank explosion.
Your reference is about 7 years old. Those magical 40,000 Mexico City taxis don't exist. This is the standard Guy Negre boondoggle. He's been doing it for about 10 years or so, and every 2-3 years, he gets a bunch of press. (Including here on SlashDot if you look back a couple years.)
BTW, the tanks are the real problem. Cheap, light, strong, pick any two.:-)
Max halon after a discharge is a few percent. I've walked around in a computer room during and after a halon discharge when a test went bad (expensive for the contractor that screwed up the test).
Back in the dawn of time, when dirt was new, we "taped-out" by writing GDSII to a 1/2" 9-track 1600bpi magtape.
Back before the dawn of time, when we didn't have dirt yet, we "cut rubies" (used Exacto knives and straightedges to cut Rubylith). People still use Rubylith to do fabric silkscreening and such. No colored tape on paper, not dimensionally stable and not enough contrast for camera-reduction.
Even after you go to the work and expense of getting your instrument rating,
there are a lot of weather conditions which wouldn't give you a second thought
in an airliner that are flat illegal for you to fly in in your Cessna (unless it's a Citation X).
And more conditions than that which are extremely dangerous (like
you just didn't get enough sleep last night).
I have a clock on my wall clock that automatically adjusts for DST - but if they change when thats going to happen I have to turn off this "feature" and manually adjust my clock.
You sure? You might have something different, but
every wall clock I've ever seen that does auto-daylight-time switching is a NIST shortwave receiver clock. You know, like
this.
Daylight time switchover is coded in the WWVB signal. Everything will work perfectly, just like it was designed. Don't worry, be happy.
Feyman "escapes" from his minders, makes some semi-unauthorized visits with NASA/contractor engineers, and comes up a guess of about a 1-in-50 chance of a loss-of-vehicle failure on any given mission.
I mean, we all know that Feynman's guesses are/were far better than most folks' calculations,
but I was sure hoping he was wrong. He wasn't.
BTW, Feynman himself seemed to be most concerned about the SSME... I'm sure it amuses shuttle hands-on operations folks (in a grim, dark sort of way) when the general population and NASA management go on-and-on-and-on about ET icefall. They *know* that there are a thousand other failure modes, just as likely.
That said, I'd volunteer to fly in a nanosecond, even though I know I'd be one of the people that spends most of the mission barfing!
Slashdot Mirror
Yes, it's a party trick, but it's a demonstration of the sort of thing that might be possible if you decided to invest in serious charging station infrastructure. (Such a charging station would need major energy storage of some kind, just like your neighborhood gas station has big underground gasoline storage tanks.)
From an engineering economy POV, it's almost certainly better to swap batteries at a battery-swap station than it is to build infrastructure to support 10-minute charge times. But the latter is a lot more fun to play with.
I'd say if it's bandwidth we're after, we shouldn't be reducing the number of signal lines.
Nope, Package pins are expensive, cable connectors are expensive, board traces are expensive, cabling is expensive. On the other hand, silicon is cheap. :-)
A 6gbps serial link is straightforward to implement, if you know what you're doing, and there are probably a couple dozen design groups around the world that can do it.
Jay
This posting is anti-insightful. I bought a tank of gas from a gas station once. It did not take me the "set distance". It took me 1/2 mile and the engine died. Bad gas (water contaminated). I never bought gas there again. The station went out of business not too long thereafter. Exactly the same for an EV battery-swap business. Load-testing the battery as part of the charging process is straightforward. Any battery-swap business that wants to survive will do that. There are lots of hard problems to solve for this business to succeed. Avoiding giving your customers bad batteries is easy to solve, not hard. -Jay-
Batteries are, and will remain for a long time, the weak link for any "mass market" EV that wants more than 50-mile range.
Palin never made any woman pay for any rape test. No one did. It's all bullshit.
Good job repeating the talking point, but that's a strawman, I'm afraid.
I'm quite sure you're correct that Mayor Palin never sat at her desk stuffing envelopes with bills for post-assault exam/evidence collection kits. She also didn't send out any water bills, right?
It doesn't work that way. It works this way: the city provides the kits to the hospital, or reimburses the hospital on a regular basis.
When the city *stops* doing that (and there is absolutely no disagreement from anyone that the city of Wassila did just that, and that the Mayor signed off on the budget changes that implemented it), then the hospital bills the patient instead.
Here's a thorough debunking of the debunking.
That doesn't make me happy at all, but then I live in the United States, where we (used to) have a constitution that protects us from unreasonable search and seizure. Feh. -Jay-
Thanks for the post killbill, you hit every single point I wanted to make and saved me the effort of writing it. -Jay-
The problem is that it is not at all obvious that ANY of the activity was "illegal" or unconstitutional.
Oh, yes, of course. The *obvious* reason for legislation to preemptively grant you legal immunity from criminal prosecution is because everything you did was perfectly legal! The logic is brilliant, just brilliant.
Sheesh. Enjoy the Kool-Aid.
-Jay-
Gold plate won't help you if your cable harness and connectors sit there soaking wet, and they won't prevent the boneheaded design decision to build in a single shutdown path for a triple-redundant computing system.
-Jay-
A nuclear plant provides baseload power. Wind and solar cannot; they are good for marginal reductions in the amount of baseload capacity you need (that's a wonderful thing, but it's not baseload).
Nuclear plants should be compared with coal/oil/hydro, that's apples-to-apples. -Jay-
It's pretty disgusting.
-Jay-
The Wiki part is awful. We have Wiki, static, CGI and Sharepoint content around here, and without exception (so far) the Sharepoint content is harder to use and less useful than any of the alternatives.
Dunno anything about the collaboration feature; I guess if you're forced to collaborate on Word docs and Excel spreadsheets for a living, you need something. -Jay-
A company called Navteq does a lot of it, and contracts out data and software.
The New Yorker had a great profile on E-mapping and route finding including a ride-along with a "Ground Truth" team that heads out with their GPS-linked laptop and drives... pretty much everywhere. One key part of ground-truthing (and good directions) is knowing the signage on the route:
so it will be much faster/cheaper to use the electronic records than if you had to manually count each vote by hand.
False dichotomy. Oregon doesn't use touch-screen machines, we use fill-in-the-bubble paper ballots and machine counters. Works great, and much faster during heavy turnout elections (where from an outsider's POV, touch-screen states just never seem to have enough of those glorified PC's around).
Oregon is vote-by-mail also, but that is an orthogonal issue.
All the same source-inspection criteria should apply to ballot-counting machines also; they are, in general, made by the same corporations that make touch-screen machines.
-Jay-
It was painless and reliable. We had zero DOS or intrusion events.
Not super-flexible, but I could always find a way to get things done once I stopped trying to do things *my* way. :-)
Jay
A taxi company running air-powered vehicles would either need a huge re-fueling infrastructure or an interesting business model (range limited to 5-10 miles), and I think it would be fascinating to see how they're doing it.
Plus it's really strange, because I can find no photographs, no press releases, nothing. Links in Spanish are fine. Thanks!
-Jay-
-Jay-
BTW, the tanks are the real problem. Cheap, light, strong, pick any two. :-)
-Jay-
Halon works by actually disrupting the combustion reaction.
There might be good reasons for a manned spaceflight, but popping into Mars orbit to do repairs ain't one of 'em.
-Jay-
Back before the dawn of time, when we didn't have dirt yet, we "cut rubies" (used Exacto knives and straightedges to cut Rubylith). People still use Rubylith to do fabric silkscreening and such. No colored tape on paper, not dimensionally stable and not enough contrast for camera-reduction.
-Jay-
Even after you go to the work and expense of getting your instrument rating, there are a lot of weather conditions which wouldn't give you a second thought in an airliner that are flat illegal for you to fly in in your Cessna (unless it's a Citation X).
And more conditions than that which are extremely dangerous (like you just didn't get enough sleep last night).
-Jay-
You sure? You might have something different, but every wall clock I've ever seen that does auto-daylight-time switching is a NIST shortwave receiver clock. You know, like this.
Daylight time switchover is coded in the WWVB signal. Everything will work perfectly, just like it was designed. Don't worry, be happy.
-Jay-
Yup, it sure is. Trivial statistics aside (100 flights is a pretty darn good sample), hasn't everyone here read What Do You Care What Other People Think?: Further Adventures of a Curious Character ? Not as much fun as Surely You're Joking..., but a damn good book.
Feyman "escapes" from his minders, makes some semi-unauthorized visits with NASA/contractor engineers, and comes up a guess of about a 1-in-50 chance of a loss-of-vehicle failure on any given mission.
I mean, we all know that Feynman's guesses are/were far better than most folks' calculations, but I was sure hoping he was wrong. He wasn't.
BTW, Feynman himself seemed to be most concerned about the SSME... I'm sure it amuses shuttle hands-on operations folks (in a grim, dark sort of way) when the general population and NASA management go on-and-on-and-on about ET icefall. They *know* that there are a thousand other failure modes, just as likely.
That said, I'd volunteer to fly in a nanosecond, even though I know I'd be one of the people that spends most of the mission barfing!
-Jay-