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Comment: Fire fighting procedures and battery... (Score 1) 232

Actually the letter from Tesla said that, while the firefighters did follow their own standard procedure and ultimately got it under control, it would have been better in this case if they had not punctured the battery pack to inject water. The letter says these holes allowed the flames to enter the trunk area. The implication is that perhaps the fire would have remained confined to one section of the the (individually fire-walled) battery compartment or directed away from the car had it not been holes punched in the top.

Also, it's really interesting to read some of the patents that Tesla has on the battery technology. They include coating the individual battery cells in an "intumescent" material that expands and insulates the cells if they exceed a certain temperature. So the cells are effectively individually firewalled to try to limit the spread of heat through the compartments and redirect dangerous levels of heat to the metal casing.

Tesla put a lot of thought into this and from everything we know the car behaved exactly as it was designed.
 

Comment: Re:Five Star (Score 1) 627

by patniemeyer (#44623717) Attached to: NHTSA Gives the Model S Best Safety Rating of Any Car In History

Ok,

A) I never said it was reasonably priced. I said that for some people the gas savings would make it "more reasonably priced"... i.e. when compared another car that could conceivably be considered in the same class such as a mid-range BMW or Audi. Some people have long commutes and burn hundreds of dollars worth of gas a month... For those people the car is not *that* much of a premium over another other luxury car.

B) The car should have almost no maintenance... No trips to the gas station, no oil changes, no transmission fluid. Brakes pads may not need changing since you hardly ever hit the brakes (regen braking is a better way to drive). How much is that worth?

C) It's by a wide margin the safest car in the world right now... How much is that worth?

D) It's car that can hold seven passengers plus luggage and do 0-60 in 5.x seconds... How much is that worth?

E) It gets over the air software updates that make it better several times a year...

F) It's pretty and fun and a from a little bit in the future...

Comment: Re:Five Star (Score 3, Informative) 627

by patniemeyer (#44620427) Attached to: NHTSA Gives the Model S Best Safety Rating of Any Car In History

The Model S starts in the $60k range and for many people who finance and factor in the gas savings monthly the payments are equivalent to that of more reasonably priced car right out the door. Also Tesla has stated that they are planning a more mass market mid-priced car in 2-3 years.

Comment: Tesla provides numbers for this... (Score 2) 775

by patniemeyer (#44180643) Attached to: Electric Vehicles Might Not Benefit the Environment After All

Elon Musk addressed this at the Model X event. Tesla says that if you live in CA and take power from the grid you end up producing 1/4 the CO2 as a gas car and in the worst case scenario where you live in West Virginia and get most electricity from coal you still only produce 1/3 the CO2.

Here is the relevant part of the clip:

https://www.youtube.com/watch?feature=player_detailpage&v=YoNd2eMsPHU#t=334s

Comment: Re:What if... (Score 1) 136

by patniemeyer (#40961731) Attached to: Scrum/Agile Now Used To Manage Non-Tech Projects

I was thinking exactly the opposite - It seems to me that certain types of creative tasks simply do not lend themselves to lots of iteration and refinement... Writing, for example, tends to get worse the more people mess with it. I'm guessing that movie scripts are the same. Obviously there's room for improvement on most kinds of projects, but I just don't see how you do iteration on writing a story or building a jet engine... at least not iteration in the sense of progressive refinement and adding features as in the agile software sense.

Comment: Analysis... (Score 1) 271

by patniemeyer (#40232157) Attached to: LinkedIn Password Hashes Leaked Online

I don't know how LinkedIn's login APIs work, but if they use secure user/pass logins and store authentication tokens on the client side as is good practice then in theory exposing these server side generated hashes wouldn't really compromise the system. The problem is that SHA-1 has been broken :( So in theory someone could reverse these and get plaintext passwords and salts or whatever is in them.

This is one reason you don't send password hashes over the network...

Comment: Wrong options... (Score 1) 239

I think you are describing those options incorrectly for his case.

--inplace is the opposite of what he wants. As I understand it --inplace will defeat some of the automatic duplicate range detection and save *space on the server* by not duplicating data during transfer. This does not help with network bandwidth but *hurt*. He probably doesn't care about space on the server, he wants his files mirrored quickly.

--update won't hurt him here, but it's probably not necessary as you seem to be describing it backwards. If he just mods files on his laptop and rsyncs the newer files on the laptop will of course get transferred. The only reason to use --update would be if he modded files on the server at home *and* on the laptop and preferred to keep the ones at home.

Pat

Comment: Re:Quantum Physics @ Home (Score 2) 465

by Cuthalion (#39788467) Attached to: Quantum Experiment Shows Effect Before Cause
A simpler explanation is that waves oscillating perpendicular to one another cannot interfere with each other at all. The x axis oscillates at full magnitude, and the y axis does too, regardless of the relative phases. The only thing that's weird here is that the third filter at 45 degrees can "remove" the 90 degree difference in polarization, but it's not that hard to understand, and can be demonstrated with a much simpler experiment by just inserting the 45 degree polarizer between the ones at 0 and 90 degrees. Bonus nitpick: current polarized 3d glasses filter circular polarized light, not linear. If you add two of those together, you'll get linearly polarized light, the angle of which depends on the relative phases. I think (I haven't tried this so I'm not sure) if you put your RealD lenses on the two slits, you would not see interference patterns with the naked eye, but you would if you looked at the screen through a linear polarizing filter.

Nothing is easier than to denounce the evildoer; nothing is more difficult than to understand him. - Fyodor Dostoevski

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