Slashdot is powered by your submissions, so send in your scoop

 



Forgot your password?
typodupeerror
×

Comment Re:Math is math (Score 2) 1010

1kw is meaningless, without a time period.
It's a unit of power, not energy.

Right. Which is why 1kW / hr doesn't make any sense. Power is a rate, watts is equivalent to Joules per second. So 1 kW / hour is an acceleration in the draw of energy, or 0.278 J / s^2.

They also didn't mean 1 kW * hr for their energy, because the rest of the sentence specified that "1 kW / hr" was $0.10 and he parked for less than 30 minutes. So yeah, clearly they meant just 1kW, and the time period is 30 minutes. Or 0.5 kW * hr for the energy.

Comment Re:Wrong subject (Score 1) 961

Serious question: what exactly are the consequences of expressing gun control sentiment on a bumper sticker "unsafely"? Does it stop at harassment, bullying, slashing your tires and keying the car? Or will some go so far as to take actual shots at your car?

I live in the South. The consequences are going to have people talk to you about how your position is unwise. Which I believe would happen quite often. You may increase your risk of getting keyed, but the only people who would do that are the people who randomly key cars anyway, they just found what they're deeming a justification this time.

The GP was making a joke. Of the same type you'd hear from a friend who is a fan of a different football team you are saying that you won't be safe at his house during the game.

Comment Re:Vampire? Huh?! (Score 5, Interesting) 424

No big mysteries here. Room for complaint that this issue hasn't been resolved quickly, though.

Your quote is from the original article from March. In the next link he talks about the latest November update, which reintroduced sleep mode.

That said, he's wrong that the latest update doesn't fix the problem. I own a Model S, and I went from losing about 5 miles off my rated range in 8 hours to losing about 1 mile per 14 hours. So, what's the difference between my car and his? Well, based on the pictures he posted, which has snow on the ground, he lives somewhere far colder than South Carolina, where I live. So his car is using more power for thermal management of the batteries.

But wait, you say. The article says, "It's a popular myth among Model S owners that much of the vampire power goes to keep the battery warm during cold nights. This is simply not true. According to Tesla, there is no thermal management of the Model S battery when the car is turned off and not charging--no matter how cold it gets."

True, guy. However, let's examine your testing methodology: "For each test, I charged the car up in the evening to its usual selected level (In my case, about 80 percent). Then I removed the charge plug. I allowed the car to sit unplugged overnight and on into the next day, until I needed to drive it. (Typically a span of 12 to 24 hours.) Before driving it, I plugged it back in to top off the vampire-depleted battery back to its original level. Then I checked the kWh-meter."

And...when you plug it in to charge it, the pumps come on, and they start heating up your battery for safe charging. There's your so-called vampire load. My car, in a warmer environment, doesn't have to spend as much energy doing that.

Furthermore, he says: "The three tests showed vampire losses of 2.3 kWh in 17 hours, 1.9 kWh in 23 hours, and 4.2 kWh in 18 hours...I can't explain the wide variation in the vampire draw over the three tests."

Maybe he should try correlating it with temperature.

Comment Re:That's because it has a software governor. (Score 1) 410

416 horse power and it can only do 132 mph is nothing to brag about.

It's not a technical limitation. The Model S has a software governor that caps its top speed. Part of the "tuning" package Tesla plans to offer for German Model S customers is a raise on the cap to somewhere closer to the "gentlemen's agreement" of 155 MPH that most auto manufacturers limit their cars with.

There's also a hidden menu setting to turn off the governor. See the video at just before the 1:00 mark. I haven't read anything about people trying it, though.

That's because nobody knows the password to get into that hidden menu.

Comment Re:Impressive. (Score 2) 410

Impressive. But stupid. Yes, the autobahn has unlimited speed, but they also require that the vehicle be in serviceable condition. Given the warning indicator for the tire pressure system, I kinda wonder if the tires were properly inflated and in good condition. But at least the test wasn't for long.

I own a Model S. There's some type of issue they've been having the cause the computer to lose the wireless signal from the pressure sensor under certain conditions, at which point that error will pop up. When I called Tesla service after it first showed up, they told me that they had some issues with the roadsters regarding electromagnetic noise from the motors interfering with the wireless from the pressure sensor, and that they thought they had the problem solved for the Model S, but that reports like mine were coming in, and they realized they hadn't. They asked me if I was on the highway when it popped up, which I was, and confirmed it was probably triggered by higher speeds and accelerations. They were looking into a fix.

The warning for improperly inflated tires is different, and tells you to check tire pressure, not call Tesla service. Considering this guy was maxing out his acceleration and speed, I suspect he ran into the bug. His vehicle was probably in good serviceable condition, and tires were probably properly inflated. The computer just couldn't read the pressure value and threw out the warning.

Comment Re:How safe? (Score 2) 947

I'm good with sharing the road, and would love for cities to be more bike friendly. I might do some bike commuting myself if that were the case. That said, you said something which I just have to comment on.

That's one of my biggest pet peeves - I can maintain a stopped trackstand for only a few seconds before i've got to unclip and put my feet down - when a car has the right of way at a stop sign, I wish they would just take it because then I can get through the intersection faster. Encouraging cyclists to take the right of way when they don't have right of way just further encourages them to not respect right of way laws.

Seriously, dude? It's a consequences issue. If the cyclist doesn't respect the right of way, and I expected him to, that's a hurt cyclist, potentially dead. If I assume the cyclist isn't going to respect the right of way and slow down until I'm sure of what he's going to do, I've inconvenienced me and and the cyclist a bit with the delay.

I'm not encouraging you to not respect right of way laws. I'm trying to encourage you to unclip and put your foot down when you reach a stop sign, because that's the only signal I have that you're going to actually stop and not run in front of me. Not doing that is the equivalent of a rolling stop.

If you always did put your foot down as soon as you reached that stopped sign instead of trying to avoid doing so, I wouldn't be slowing down, and we'd both get through the intersection faster. I'd love to just be able to do what I know is the right thing and go, but as I've mentioned before, the consequences for me if the cyclist didn't see me or thinks he can cross quicker than he actually can is that I'll run over the dude. At that point, I don't care whose fault it is, I just don't want that on my conscience.

Comment Re:I think... (Score 1) 530

Well, consider that relativity tells us that the satellites zooming up above us have slower ticking clocks.

Actually, the GPS satellite clocks run 38 microseconds faster than ground based clocks.
This is because they are not moving fast enough (special relativity: faster means slower clock) to counter the general relativistic effects (stronger gravitational field means slower ground clocks).
Both clocks seem to be slower for an observer in free space.
http://www.astronomy.ohio-state.edu/~pogge/Ast162/Unit5/gps.html

You are absolutely right. I appreciate the correction.

Comment Re:I think... (Score 5, Informative) 530

After reading a lot on this is that sometimes an issue becomes a problem without reason.

Now, time is ONLY a man made measure - a measure between events. Nature/the universe doesn't know what time is nor cares about it. It is only us humans that need to try to explain time dilation and various other 'time issues' to make the maths work. Remove time, and I bet it will balance these equations.

Time cannot run backwards,as there is no such thing as time except in the human brain and the human concept of measuring changes.

Nature doesn't care about time? Tell that to the laws of thermodynamics. Entropy only goes one way.

If you watch a video of a ball rolling on a desk, you can't tell just by the video whether time has been reversed. The physics governing that motion don't care about time. If you watch a video of an egg being shattered, you'll know when the video is reversed. You know all the contents of the egg can't spontaneously get back together as time moves forward. That would be going to a much more well-ordered state.

Also, the GPS device you use to triangulate your position and navigate to your destination? Well, consider that relativity tells us that the satellites zooming up above us have slower ticking clocks. They're actually moving through time slower than you are, and our current GPS accuracy wouldn't be achievable if we didn't take that into account.

Comment Re:Why? (Score 2) 527

That makes sense only if you assume the judge is impartial, and the suspect in question is not persecuted for political reasons. Those are bad assumptions in todays America. We already have a lawless society, as demonstrated by the complete lack of prosecutions against anyone involved in illegal surveillance, any bankers whose fraud destroyed the economy and thousands of lives, and against anyone who committed or authorized torture during the Bush regime.

You have to decide which side you are on. The side who breaks the law for the greater good? Or the side who uses the law to commit evil? This is the reality in which we live.

I agree with you completely that problems exist. I don't agree that arbitrary ignoring the justice system is a solution, instead of an action that furthers the problem. It's hard to fight a lack of respect for justice by demonstrating your own lack of respect for justice.

When a judge gives you a warrant to turn over information on one of your users, and you have absolutely no idea whatsoever who the user is or what information is contained in the messages (Lavabit itself couldn't decrypt the communication), you don't have a leg to stand on to deny them the request. How do you know you're not interfering with a proper investigation on someone who used your service to arrange an assassination? You're assuming that particular warrant is invalid, merely because unjust warrants have been issued in the past. I'm not sure sure how you can rationally defend that view, considering perfectly just warrants are also issued all the time.

On the other hand, when you're given a warrant that says, "give me information on all your users," you know that's fishing expedition. You can certainly take a principled stand there.

Comment Re:Why? (Score 1) 527

I see you trust the courts more than I do.

I trust the concept of a court. I'm not sure what the better alternative is.

That said, I would have obeyed a warrant, not because I think it was properly issued, but because I'm a coward. But if you're talking about "principled", principled would require that I believe the warrant was properly issued.

Well, if you believe the warrant is improperly issued, of course they should fight it, preferably through legal means if possible. And they did. The warrant that required them to turn over their SSL keys was definitely improperly issued, in my opinion, as it targeted every user indiscriminately. I'm not sure why everyone seems to assume the original request was out of line. I completely understand answering an FBI request for the information on the user with, "go get a warrant, then we'll talk." Once they get a warrant, you comply, they followed the correct process. Of course, they got all bitchy that Lavabit would dare force them to involve the courts and decided to retaliate, and that's definitely wrong. That's also the point at which Lavabit took a principled stand.

Comment Re:Why? (Score 1) 527

Once they were given a proper warrant, complying is the principled thing to do.

No, that's the safe thing to do. The principled thing to do is to engage in civil disobedience.

Civil disobedience is a fine thing to accomplish when you believe the laws are wrong. I'm not personally against turning over information when the authorities are following the due process. It's one thing to say, "I want to see what everyone is doing, hand me your data on all your users" and it's something else entirely to say, "I've submitted evidence to a judge that requires gathering information on this one suspect, the judge agrees and provided us with a warrant, please provide this information." The latter is fine. I'm for a free society, not a lawless one.

Comment Re:Why? (Score 4, Insightful) 527

Lavabit wasn't as principled as claimed by Glenn Greenwald et al. They did actually plan (or told the courts and the FBI they would anyway) to release the records relating to $PROBABLY_SNOWDEN to the FBI. At best you can argue they were lying, but how's that showing integrity?

Once they were given a proper warrant, complying is the principled thing to do. That's proper due process. The point is to prevent the government from gaining access to information while skipping said due process. So no, at best I can argue they were telling the truth, and doing the right thing.

Lavabit made a number of elementary legal mistakes from the beginning, even avoiding using a lawyer in the first hearing. These mistakes made it easy for the FBI to argue that they couldn't trust Lavabit to do what Lavabit was offering to do. Lavabit should have contacted the FBI immediately, made it clear their concerns

Assuming the facts are correct, agreed.

and not made a clearly bad-faith offer to provide something useless to the FBI

I don't think that's what they did. The first offer of providing the information on a monthly basis seems both useful and better targeted than the initial FBI request. Why is this a bad-faith offer?

Notwithstanding the above, the court's refusal to allow Lavabit to talk to politicians et al about the basic principles in the case seems absurd and completely unconstitutional.

Right. The whole thing was the government throwing a fit. "Oh, you want to fight us. We'll up the ante, and ask for something completely unreasonable then.." It was very principled on their part to not fold as a result, and to shut down instead of giving them what they wanted.

Comment Re:Better games came along right after? (Score 1) 374

I don't think FPS killed adventure games though, I just think that over time as more and more people started playing games that the type of people who love adventure games are outnumbered by the type of people who love FPS games. And of course there's overlap between the groups. So while the number of adventure games and adventure game players has also grown, it just has grown at a slower rate.

I agree with you. When I say that it killed the genre, I mean that I don't particularly like the newer adventure games that still get made. Because it all uses a 3D engine, and I have to walk around and look for stuff. I like the adventure games in the old style. Look at a static screen, figure out what can be done here, move to the next static screen. I don't see those being made anymore.

Comment Re:Better games came along right after? (Score 1) 374

Putting very hard puzzles between no exposition and story fragments left me with a "WTF am I doing here?" There was no story that I wanted to have continued. Just random, meaningless puzzles.

And that's a fine point and good criticism. I didn't mean to say everybody should love Myst. I just wanted to point out that the reason I enjoyed it had nothing to do with polished pre-rendered graphics. The graphics in today's games are much better, but I still prefer Myst's gameplay. Since you don't like the style, even back when Myst was popular, you still didn't like it. That's cool.

For me, the whole, "wtf am I doing here?" feeling is what made the game. That's the story. I find myself in this island, I'm not sure where I am or how I got here. It's my job to find out. The puzzles had a consistent theme (and once you started hopping worlds through the books you find, each world had its theme), and although you weren't sure of their meaning, you eventually discovered it. At the Myst island, the puzzles were hiding spots for the books, which were each hidden within a mechanism that mimicked the theme of the age the book linked to. The tower was something of a password hint, designed to help Atrus or Catherine figure out how to get to the books if they forgot the key to the puzzles. Discovering what everything was all about was the exciting part for me.

Slashdot Top Deals

Stellar rays prove fibbing never pays. Embezzlement is another matter.

Working...