Finally, the complexity of an electric car is much much much less than a gasoline car. No exhaust, no belts, no cooling system (except for the electric ac), no transmission really, no power steering or brake fluids, no oil, etc etc.
Regenerative braking goes a long way to stopping a car, but unless you have an in-hub motor in each of the four wheels, you will still need a way of controlling the braking to each wheel. You can't brake with just the front or back wheels, and you need per-wheel control for ABS and stability control to work. Maybe there is another way around this without using fluids but at the end of the day when you blow a major fuse and all the electronics are dead, adequate pressure on the brake pedal will stop a car with a hydraulic brake system.
I don't know enough about power steering systems but would a hydraulic fluid really not be required there either?
But on the whole, an electric car really is a lot simpler. There are more electronics and a lot more sensors in an ICE management system than an electric motor controller. An electric car needs to switch much higher currents, but that's a solved problem.
Conservation of momentum means that closed systems do not magically accelerate no matter how many times you wave your hands saying "relativity".
hmmm... i wonder if this proves the non-existance of wormholes in the 'magic portal' sci-fi sense...
suppose I had two large tubes parallel to each other and fixed together. We'll call one end north and the other south. At the south end of each tube we'll put the worm hole, such that an object travelling south in one tube goes through the worm hole and comes out of the worm hole in the other tube travelling north.
At the north end of each tube, facing south, is a person. Propulsion would be achieved simply by the two people throwing the ball to each other through the worm hole. As each one throws the ball, the rest of the system moves north. The worm hole provides the violation of the conservation of momentum which means that capturing the ball no longer resets the system to it's original momentum.
This would result in a closed system accelerating, which really isn't on...
Have you ever noticed in the Simpsons how almost anything involved in a collision explodes? I think in the episode where Homer forgets to pick Bart up and so Bart goes and gets a 'Bigger Brother', there is a scene where someone is blown away in a strong wind and gets carried off almost to the horizon, where she then crashes into the ground and explodes. I assumed that this was another pisstake on hollywood explosions:)
Is that gas as in gasoline or gas as in something that is a gas at room temperature?
I kind of assumed that using a liquid-at-room-temperature-and-pressure fuel at that scale wouldn't work and that you'd have to use a gas...
If you used hydrogen then your byproduct is water, which is easy enough to get rid of and won't leave any residues. To use bio-diesel would be bordering on stupid in this case, you'd be venting all sorts of chemicals to atmosphere (eg carbon monoxide), and the residues would clog the system up almost instantly at that scale - have you ever seen the inside of an ICE after it has been running for a while on petrol or diesel? I know bio-diesel is a bit cleaner but not that much cleaner...
Statistically i think it's still more likely to happen in a restaurant, although i haven't seen any recent research which would support this.
The thing about doing it on the internet is that it's much easier to 'steal' thousands of numbers with minimal effort (compared to the effort required to do it a non-internet way).
An improperly charged/discharged LiPo battery can literally result in a fireball.
Lithium Polymer batteries appear much safter than Li-Ion batteries, which can (and do) literally result in fireballs when _properly_ charged/discharged:)
Presumably i'm mis-informed, but I always thought that even though the Li-Ion/Po batteries have a higher energy density, they still didn't beat a Ni-Cad in terms of the ability to deliver higher current under a wider range of conditions.
The current delivery only matters if you are running an electric motor though... I guess if you're using an ICE and the battery was running the logic and maybe a small servo or two, current delivery wouldn't be such an issue, in which case the Lithium batteries might be a much better choice, especially on something that needs to get airborne.
Is there any skill involved in the game of roulette? It seems that the fact that you are winning would be a giveaway that something was going on. You'd have to pretend over and over to be a different person, walking in and placing a couple of bets and getting lucky.
Casino operators know that gambling is a suckers game and if you come in and start winning you'll stand out a mile away... with obvious consequences.
Thanks for the explanation. The net result though is that by the time they get around to responding to my "hello?", i'm pissed off enough to hang up. My time is worth something to me, even if it's not to them.
Doom, because it practically reinvented the FPS, both in terms of originality of gameplay and graphics quality.
You obviously never wasted a summer playing wolfenstein 3d then?
Doom would make the list for bringing in network multiplayer though. The amount of time I wasted with cheap network cards, cheap (probably not proper 50 ohm network quality:) coax and making network terminators with a coax connector, a 50 ohm resistor and a soldering iron... just to play a multiplayer game of Doom:)
Then there was trying to run TCP/IP over a dos SLIP packet driver to a linux box with 4 serial ports in it, before we could afford network cards
I'm in Australia, so things are a little different, but the one thing that is really ticking me off these days is that when I answer the phone with "Hello", i get nothing for about 5 seconds, during which time I've said "Hello?" again a few times. I assume it's just answering machine detection, but it really pisses me off. When that happens (which must be about 9 out of every 10 cold calls now) and the Indian accented voices comes on (again, 90% of calls) with "Hello Mr <lastname>", I tell them to go away (or worse) and then hang up.
Maybe it's just me but i think that calling someone and then not being on the other end of the phone when they answer is the height of rudeness.
Of course, once I buy an FXO ATA and can achieve WAF with Asterisk, the problem will be solved in a much cleaner way such that i won't even hear the phone ring for calls with no CLID, they'll have to press a few buttons first:)
More important than that, you'd better register your name now before someone else registers it first and then pretends to be you.
Seriously though, can't we all just use our slashdot ID's? I'd much prefer to be a member of an organisation that looked deep into my soul and assigned me a number based on the order in which i joined.
I don't think DNS is really the problem. It's more likely that the internet will come to a standstill as everyone fires up their bittorrent clients and starts downloading a copy!
So... i predict the end of the internet... you heard it first here:)
CAPTCHA is a (bad) acronym. It stands for 'Completely Automated Public Turing test to tell Computers and Humans Apart'. You need a 'CAPTCHASA' ('Completely Automated Public Turing test to tell Computers, Humans And Slaves Apart'). That's going to be a little harder...
The Captcha itself is doing exactly what it is supposed to do.
Of course, the real problem is a society where being exploited at 60 cents an hour is the best someone can do.
Better wait till she hears the news first. Last I heard she was wandering around Tasmania and hadn't been notified yet. Hope she doesn't read slashdot. Hope the kids don't read slashdot.
I asked the question elsewhere that you appear to have answered here.
Do you think that this sort of research will lead us to be able to take a cell from an adult human and 'convert' it into a 'omnipotent' cell, and therefore be able to make a 'proper' clone (eg including the mitochondrial dna)?
Additionally, could you 'graft' one of these 'pluripotent' stem cells to the end of an existing umbilical cord (the cord would only be a cell or two at that point i guess)?
I'm not sure if there's an answer to this question yet, but if a 'stem cell' can be created from an adult cell, could this stem cell be converted (or is it already?) into a cell that could be implanted into a uterus and grow into a truly cloned human being? (as opposed to the semi cloned creations so far where the mitochondrial dna doesn't belong to the clone)
If that's the case, then yes, there will be ethical (and religious) issues that need to be addressed.
I'd trust my kids to do the right thing, but i'd not necessarily trust them to always have a balanced idea of what the right thing is.
The funny thing about kids is that they tend to be very impulsive (some more so than others) and very easily swayed by peer pressure. At 5am, after partying for 8 hours and consuming even a small amount of alcohol, the 'right thing' can be pretty hard to define for an 18 year old.
Also remember, a 6am knock on the door by a police officer is not the way you want to find out that you couldn't trust your kid so much afterall.
I'd be calling your insurance company next. They have an interest in getting the stolen goods back too, in that then they don't have to make a claim.
The whole situation is pretty silly though. You're basically handing the police a solution on a plate. They won't have to do too much detective work to get a result, and even if it doesn't end in a conviction, at least they's be showing you that 'the system works', and on a slow news day they might even get a _positive_ write up in the local media.
Also, currently if you have something worth patenting, but don't have the funds to go through with the process you can hold off for a bit until you have some investment capital behind you, or maybe until you actually make a few sales. With this idea, what's to stop the first investor you approach for capital stealing your idea without paying you for it? (either directly or via another party)
Whatever happened to the idea that you can't patent something without a working example of the thing you are trying to patent?
Slashdot Mirror
Regenerative braking goes a long way to stopping a car, but unless you have an in-hub motor in each of the four wheels, you will still need a way of controlling the braking to each wheel. You can't brake with just the front or back wheels, and you need per-wheel control for ABS and stability control to work. Maybe there is another way around this without using fluids but at the end of the day when you blow a major fuse and all the electronics are dead, adequate pressure on the brake pedal will stop a car with a hydraulic brake system.
I don't know enough about power steering systems but would a hydraulic fluid really not be required there either?
But on the whole, an electric car really is a lot simpler. There are more electronics and a lot more sensors in an ICE management system than an electric motor controller. An electric car needs to switch much higher currents, but that's a solved problem.
hmmm... i wonder if this proves the non-existance of wormholes in the 'magic portal' sci-fi sense...
suppose I had two large tubes parallel to each other and fixed together. We'll call one end north and the other south. At the south end of each tube we'll put the worm hole, such that an object travelling south in one tube goes through the worm hole and comes out of the worm hole in the other tube travelling north.
At the north end of each tube, facing south, is a person. Propulsion would be achieved simply by the two people throwing the ball to each other through the worm hole. As each one throws the ball, the rest of the system moves north. The worm hole provides the violation of the conservation of momentum which means that capturing the ball no longer resets the system to it's original momentum.
This would result in a closed system accelerating, which really isn't on...
Have you ever noticed in the Simpsons how almost anything involved in a collision explodes? I think in the episode where Homer forgets to pick Bart up and so Bart goes and gets a 'Bigger Brother', there is a scene where someone is blown away in a strong wind and gets carried off almost to the horizon, where she then crashes into the ground and explodes. I assumed that this was another pisstake on hollywood explosions :)
Is that gas as in gasoline or gas as in something that is a gas at room temperature?
I kind of assumed that using a liquid-at-room-temperature-and-pressure fuel at that scale wouldn't work and that you'd have to use a gas...
If you used hydrogen then your byproduct is water, which is easy enough to get rid of and won't leave any residues. To use bio-diesel would be bordering on stupid in this case, you'd be venting all sorts of chemicals to atmosphere (eg carbon monoxide), and the residues would clog the system up almost instantly at that scale - have you ever seen the inside of an ICE after it has been running for a while on petrol or diesel? I know bio-diesel is a bit cleaner but not that much cleaner...
Statistically i think it's still more likely to happen in a restaurant, although i haven't seen any recent research which would support this.
The thing about doing it on the internet is that it's much easier to 'steal' thousands of numbers with minimal effort (compared to the effort required to do it a non-internet way).
Lithium Polymer batteries appear much safter than Li-Ion batteries, which can (and do) literally result in fireballs when _properly_ charged/discharged
Presumably i'm mis-informed, but I always thought that even though the Li-Ion/Po batteries have a higher energy density, they still didn't beat a Ni-Cad in terms of the ability to deliver higher current under a wider range of conditions.
The current delivery only matters if you are running an electric motor though... I guess if you're using an ICE and the battery was running the logic and maybe a small servo or two, current delivery wouldn't be such an issue, in which case the Lithium batteries might be a much better choice, especially on something that needs to get airborne.
Is there any skill involved in the game of roulette? It seems that the fact that you are winning would be a giveaway that something was going on. You'd have to pretend over and over to be a different person, walking in and placing a couple of bets and getting lucky.
Casino operators know that gambling is a suckers game and if you come in and start winning you'll stand out a mile away... with obvious consequences.
Thanks for the explanation. The net result though is that by the time they get around to responding to my "hello?", i'm pissed off enough to hang up. My time is worth something to me, even if it's not to them.
You obviously never wasted a summer playing wolfenstein 3d then?
Doom would make the list for bringing in network multiplayer though. The amount of time I wasted with cheap network cards, cheap (probably not proper 50 ohm network quality
Then there was trying to run TCP/IP over a dos SLIP packet driver to a linux box with 4 serial ports in it, before we could afford network cards
I think back in those days porn was stored on wetware, or paper
I'm in Australia, so things are a little different, but the one thing that is really ticking me off these days is that when I answer the phone with "Hello", i get nothing for about 5 seconds, during which time I've said "Hello?" again a few times. I assume it's just answering machine detection, but it really pisses me off. When that happens (which must be about 9 out of every 10 cold calls now) and the Indian accented voices comes on (again, 90% of calls) with "Hello Mr <lastname>", I tell them to go away (or worse) and then hang up.
Maybe it's just me but i think that calling someone and then not being on the other end of the phone when they answer is the height of rudeness.
Of course, once I buy an FXO ATA and can achieve WAF with Asterisk, the problem will be solved in a much cleaner way such that i won't even hear the phone ring for calls with no CLID, they'll have to press a few buttons first
More important than that, you'd better register your name now before someone else registers it first and then pretends to be you.
Seriously though, can't we all just use our slashdot ID's? I'd much prefer to be a member of an organisation that looked deep into my soul and assigned me a number based on the order in which i joined.
Does this mean that Tropicana's next product will be called Soylent Green?
Just this evening i was sssh'd by my 17 month old son who was trying to watch "The Goodies" when i got a phone call
Can't remember being sssh'd before that though.
I don't think DNS is really the problem. It's more likely that the internet will come to a standstill as everyone fires up their bittorrent clients and starts downloading a copy!
:)
So... i predict the end of the internet... you heard it first here
CAPTCHA is a (bad) acronym. It stands for 'Completely Automated Public Turing test to tell Computers and Humans Apart'. You need a 'CAPTCHASA' ('Completely Automated Public Turing test to tell Computers, Humans And Slaves Apart'). That's going to be a little harder...
The Captcha itself is doing exactly what it is supposed to do.
Of course, the real problem is a society where being exploited at 60 cents an hour is the best someone can do.
Better wait till she hears the news first. Last I heard she was wandering around Tasmania and hadn't been notified yet. Hope she doesn't read slashdot. Hope the kids don't read slashdot.
I asked the question elsewhere that you appear to have answered here.
Do you think that this sort of research will lead us to be able to take a cell from an adult human and 'convert' it into a 'omnipotent' cell, and therefore be able to make a 'proper' clone (eg including the mitochondrial dna)?
Additionally, could you 'graft' one of these 'pluripotent' stem cells to the end of an existing umbilical cord (the cord would only be a cell or two at that point i guess)?
Just curious.
I'm not sure if there's an answer to this question yet, but if a 'stem cell' can be created from an adult cell, could this stem cell be converted (or is it already?) into a cell that could be implanted into a uterus and grow into a truly cloned human being? (as opposed to the semi cloned creations so far where the mitochondrial dna doesn't belong to the clone)
If that's the case, then yes, there will be ethical (and religious) issues that need to be addressed.
I'd trust my kids to do the right thing, but i'd not necessarily trust them to always have a balanced idea of what the right thing is.
The funny thing about kids is that they tend to be very impulsive (some more so than others) and very easily swayed by peer pressure. At 5am, after partying for 8 hours and consuming even a small amount of alcohol, the 'right thing' can be pretty hard to define for an 18 year old.
Also remember, a 6am knock on the door by a police officer is not the way you want to find out that you couldn't trust your kid so much afterall.
I'd be calling your insurance company next. They have an interest in getting the stolen goods back too, in that then they don't have to make a claim.
The whole situation is pretty silly though. You're basically handing the police a solution on a plate. They won't have to do too much detective work to get a result, and even if it doesn't end in a conviction, at least they's be showing you that 'the system works', and on a slow news day they might even get a _positive_ write up in the local media.
The more important question to ask is, 'what protection is there for those working in a hotdog sawmill?'
Also, currently if you have something worth patenting, but don't have the funds to go through with the process you can hold off for a bit until you have some investment capital behind you, or maybe until you actually make a few sales. With this idea, what's to stop the first investor you approach for capital stealing your idea without paying you for it? (either directly or via another party)
Whatever happened to the idea that you can't patent something without a working example of the thing you are trying to patent?
According to the context sensitive help in the DOS version of Borland C++, 7Hz is also the resonant frequency of a chickens skull.
0 3
http://www.everything2.com/index.pl?node_id=10735
99% means 3-4 junk emails in my inbox every day. That ain't so good.