Follow Slashdot stories on Twitter

 



Forgot your password?
typodupeerror
Trust the World's Fastest VPN with Your Internet Security & Freedom - A Lifetime Subscription of PureVPN at 88% off. Also, Slashdot's Facebook page has a chat bot now. Message it for stories and more. ×

Comment Re:They will game the system and destroy home wi-f (Score 1) 52

They will find a way to disrupt the indoor communications. They will feign innocence and claim it is all some mistake and misunderstaning and they are going to fix their equipment to correct the problem, but quietly they will pay a few millions in fines without admitting guilt, but make sure most people give up home wi-fi due to frustration.

Like the banks have ground down the opposition and they happily charge 40$ late fee for being 1 dollar short or 1 day late, without anyone feeling upset.

Comment Tesla (the original) had such a charging system. (Score 1) 79

Apparently he had a coil about 8 feet off the floor along the walls. Another coil placed at the same level would get current induced in it by the alternating current circulating in the loop. He published the work about resonant inductive coupling in the years 1891, 1892 and 1893. (Links stolen shamelessly from wikipedia.)

Comment They will game the system and destroy home wi-fi (Score 2) 52

Unorganized individual home wi-fi owners and users on one size. Mega telecom companies with deep pockets full of government lobbyists, money and politicians on the other side. Both allowed to use the home wi-fi spectrum. You don't have to be Einstein to see what is going to happen.

There will be so much of interference with home wi-fi people will be forced to use mobile data. Or string cat-5 cables all over their homes to wired ethernet to every room.

Comment Re:another view... (Score 1) 106

You know it would be more efficient, and I would grant you 90% of the people know it would be more efficient if every one relaxed a little bit. But all it takes is a few to be bit more aggressive. And it will set the ball rolling towards everyone rush as fast as you can.

The starkest effect is seen in flights between India and USA. Most passengers would patiently wait their "zone" to be called while boarding in USA to fly to India. Almost the very same set of passengers would be lining up in Delhi or Mumbai to return. As soon as the first gate agent appears in sight, they all scramble to line up to board, rush the gate, crowd it and make it impossible for the gate agent to enforce any kind of order. The difference? The Indian Americans are constant in both flights. Subtracting out, the difference comes to a few Europe bound passengers boarding in USA and a few Middle-East bound passengers boarding in India. They make all the difference.

People obey the rules, if they believe others are also obeying the rules. If they see a few overspeed, others would too. If they see a few people cutting off autonomous autos others will follow suit.

Comment Will people like self driving cars? (Score 4, Insightful) 106

Basically no one obeys speed limits. The posted speed limits are at best suggestions, and at worst revenue generators for the local governments. And many other traffic rules are casually disobeyed. Except for the stop sign, I don't see much voluntary compliance of traffic law. Stop after the white line at the signals, making a rolling right turn through the red light, 5 or 10 mph over speed limit within the city, 10 to 15 mph over the limit on highways are rampant.

Now throw into this mixture a fleet of cars, strictly obeying speed limits, preferring to slow down rather than speed up on yellow, refuse to use free right turns, coming to full stops on grade crossings... A few Access vans, school buses and trucks doing this itself annoys people stuck behind them in traffic. Now suddenly a large fleet of vehicles with a spinning dome on the head ....

Also, in the game of chicken, the winning strategy is to appear be irrational. Break your steering wheel and throw it away in full view of the competitor, "I can't swerve, even if I want to, your move buddy!". All these cars are known to rational decision makers. They will be gamed like nobody's business. People will dangerously cut infront of them, be very rude to them, after all they are machines, no hard feeling. And every time the self driving car will slow down, yield, and let the barbarians get away with it.

In isolated test cases, in small numbers they will work. But large number of them interacting with large number of normal people, they will be forever stuck on the highway ramp or left turn yield on green locations.

Comment Maxwell is admired (Score 5, Insightful) 123

It is very common to see T-shirts and mugs like these images saying And God said, {maxwell's equations in vector calculus notations}, and there was light.

Father of computational electromagnetics Zoltan Cendes, named his flagship product Maxwell(tm). He is the one figured out how to remove the null space of the curl vector from the computational solutions. Before that naively applying finite element formulation to Maxwell's equations yielded garbage. His edge-vector finite element formulation is the gold standard in getting computational EM results.

This brings up what Linus said recently. One would think Maxwell's equation was all "innovation". But remember, Maxwell did not work in the vector calculus! He was working in analytical geometry, Cartesian coordinate system. Laboriously wrote out the expanded forms of the gradient operator and worked through the equivalent of the cross product explicitly term by goddammed term. I see Computational EM developers struggling to keep up with the math even with the use of Matlab and Mathematica software packages handling symbolic algebra. That he did it all in analytical geometry, for the first time, without knowing all the gibberish he was writing down will eventually lead to a breakthrough....

Is it possible other great mathematicians of his day had this idea? Probably. Some might have even pointed the direction to Maxwell himself. But, in the end, trudging through all that algebra and coordinate geometry in the long form laboriously is what made that breakthrough possible. Yes, innovation is needed as the spark. But, blood, sweat and toil contribute a lot more to success.

Slashdot Top Deals

Competence, like truth, beauty, and contact lenses, is in the eye of the beholder. -- Dr. Laurence J. Peter

Working...