Follow Slashdot stories on Twitter

 



Forgot your password?
typodupeerror
×

Comment Re:But does it ... (Score 4, Interesting) 140

As a side effect, this will finally, finally, FINALLY put an end to the dreaded find-a-parking-space-in-a-busy-city-on-Friday-night drill.

Self-driving cars can not only use remote parking lots, they can also make much better use of parking lot space. They are unoccupied when they self-park, so there is no need to leave room for people to exit. So they can park just an inch apart, and the absence of side mirrors will make that very close. Less space is needed for lanes, since the cars can steer optimally and coordinate their movements. Cars could park directly in front and behind each other, then when summoned by its owner, a car could signal for the blocking cars to move. The capacity of a parking lot can easily be doubled or tripled.

Comment Re:Common knowledge (Score 1) 270

In the business, this is called duty cycle, and there are significant MTBF differences between enterprise quality drives (FC, SAS) and consumer drivers (SATA, NL-SAS) at high duty cycles.

No there isn't. This article was just more confirmation that there is NO difference between "enterprise" and "consumer" other than the price. Plenty of other people have looked at the data and reached the same conclusion. Also: the MTBF number on the side of the box has no connection to reality. It is just a number made up by the marketing department.

Comment Re:Common knowledge (Score 1) 270

Perhaps you are missing this part:

Enterprise drives do have one advantage: longer warranties...

Businesses want longer warranties especially these days ...

The warranties are just more evidence that "enterprise drives" are a scam. Warranties are almost never worth the price you pay for them. If they were, few companies would be foolish enough to offer them.

Comment Re:Common knowledge (Score 4, Interesting) 270

What? There's absolutely difference between 87 octane and 92+ octane.

For 99% of cars, there is no difference. Unless a car is specifically designed to use a higher compression ratio, there is no benefit whatsoever to a higher octane rating. Besides, you are assuming that the premium gas actually has a higher octane rating. Years ago, it actually cost more to make high octane gas. Today the octane rating can be tweaked with cheap additives. So it is common to just make it all 92, then just use one tanker truck to make the delivery and just fill all the tanks with identical gas.

Comment Re:And they wonder why... (Score 1, Insightful) 562

There's just something egregiously wrong when you can be fined $183,000 and get two years probation for something like participating in a short-lived denial of service attack. That's a wildly disproportionate punishment!

D=P*S-B, or Deterrence = (Probability of getting caught) * (Severity of punishment) - Benefit.

Since very few participants in a DDoS get caught, the punishment must be severe to have much deterrence.

Comment Re:Study is flawed -- compares cities to countries (Score 2) 263

As an American, you were probably allowed only into the better schools.

I lived in Gubei, which is a nice neighborhood in Puxi (western Shanghai), so the school was probably above average. It was the official public school for our area. There was nothing fancy about it. There was no heat or AC. Shanghai is hot and humid in the summer, and often below freezing in the winter. The kids use gloves with the fingertips removed, so they can keep their hands warm but still write. I have nieces and nephews in other parts of China, and while the facilities vary, the discipline and high expectations do not.

Comment Re:Study is flawed -- compares cities to countries (Score 5, Informative) 263

The study is flawed because it takes into account the same crappy tests that utterly fail to test for any sort of understanding of the material. This is not "education," unless you consider pure rote memorization to be education.

Baloney. Have you even looked at the test? Here are some example questions. The questions involve a lot more than "rote memorization".

Comment Re:Study is flawed -- compares cities to countries (Score 4, Informative) 263

in Europe, city centers tend to be expensive, prestigious, and very well equipped with top schools. It's probably the poor suburbians who fare worse.

In America it is exactly the opposite.

I lived in Shanghai for several years, and my kids attended school there. In American math class they say "show your work". In Chinese math classes they say "do it in your head". Chinese kids have to stand with their hands behind their backs, looking at a list of integers on the whiteboard, and add them up in their head. They do the same with subtraction, multiplication, and division. They drill until they get good at it. As an American, I never learned to do that. So when I need a list of numbers added, I just ask my Chinese educated daughter to do it. That is usually quicker than looking for a calculator.

Comment Re: Top talent is always hard to find (Score 1) 238

autonomous cars aren't new because it's just a car with an airplane's autopilot.

Autonomous cars are not new. Back in the horse and wagon days, if you traveled a route frequently, your horses would learn the way. Then you could lay down on the straw in the back of the wagon and take a snooze, trusting your horses to know the way home.

Comment Re:Big problem here... (Score 4, Informative) 151

If it's concentrated enough, why can't you use sea water as "fresh", since it is powered by the difference in salinity, not the absolute value.

Research has been done on this, and I believe that a pilot plant may be built in the UAE or Oman in the next few years. It will use brine, concentrated in solar ponds, as the source of NaCl, and plain seawater as the sink.

Slashdot Top Deals

"When the going gets tough, the tough get empirical." -- Jon Carroll

Working...