Forgot your password?
typodupeerror

Comment Re:I want to see inexpensive plugin hybrids but .. (Score 1) 135

You might want to read up on how current hybrid vehicles actually work, 'cause it seems you have more than one misconception going on.

I have. For instance, my latest vehicle is the Ford F-159 XLT,, the full-hybrid model of the F-series pickup truck line. Power train is:
  - 6 cylinder dual-turbo engine. (runs low power but approoximately doubles output when a lot is needed.)
  - 47 HP motor-generator "pancake" on the engine side of the ttransmission, to scavenge / return power to./from a 1.5 kWhr lithium battery.
  - 10-speed automatic transmission, working with the lithium battery;s main alternator to fine-tune match the engine/mogen to the current driving situation. Max power of engine plus hybrid mogen; 430 hp.
  - full four wheel drive.

So it's primarily a gas-engine power train with an electric-car motor mechanically coupled to the engine shaft. Many other hybrids, from the venerable prius onward, are similar, with plug-in variants having a big scavaging/peaking battery good for pure electric operation of tens of miles rather than a minute or so and a wall-powered charger added.

What I'm looking for is essentially a pure electric - totally electronic "transmission" consisting of alternator(s) between the batteries and the motor(s), plus a tiny engine-generator able to burn gas and feed some teens of KW of charging power into the batteries when running down the road or parked near it.
 

Comment cobalt chemistry, not so nice. (Score 1) 115

Do the Waymo batteries use one of the lithium chemistries including cobalt, or a non-cobalt chemistry such as lithium iron phosphate?

Cobalt chemistries have a higher power/weight and energy/weight ratio, which made them the go-to chemistries for vehicle batteries. But they also produce oxygen when the cells overheat, leading to an unextinguishable runaway fire hazard: A burning cell makes enough heat to ignite the adjacent cells, so the whole assembly of them goes. Bad enough when it's a car's worth, but a disaster if it's a shipping-container sized module of a utility energy storage site. (And even worse when the site is a building full of racks, which someone had "protected" from fire with water-spraying, equipment-shorting system, so the whole site burns up, as happened recently with one in California creating a toxic mess.)

That's why purpose-built stationary lithium energy systems use non-cobalt chemistries - heavier, but a shorted cell just kills itself without getting hot enough to light off its neighbors.

Comment I want to see inexpensive plugin hybrids but ... (Score 1) 135

I want to see inexpensive plugin hybrids.

But not like the current ones, which are primarily an engine/tranny powertrain with a motor/generator + small battery for scavenging downhill/braking energy for later accelleration/uphill/cruise/power-boost.

I want ones that are primarily a battery-electric with a small aux engine-generator (say 15-20 HP range), big enough to power crusing with a bit left over for gradually charging. That would let you range-extend by the size of your gas tank plus fillups (i.e. indefinitely if only gas is available) or go from battery empty to back on the road in a couple tens of minutes.

The backup engine would only run at max-efficiency speed and could use an atkins-like cycle (see "liquid piston engine") to get the max power out of the fuel. Most operation would use power-grid charging (when available and cheaper than fuel).

Comment Look up "human shields" (Score 1) 255

And a douche bag of a president who drops bombs next to schools and kills 135 kids . Should resign on the spot for that.

Look up "human shields", the practice of siting military targets among (or in or under) large collections of non-military civilians, in order to deter strikes against them or produce propaganda claims of atrocities when they're attacked anyhow.

In such situations the fault for the "collateral damage" is assigned to the side that set up the arrangement, not the side that hit it.

Nevertheless, it should be noted that the US has been trying very hard to use precision munitions and extreme military intelligence to take out military targets with as little harm to the innocents they're embedded among as possible, with impressive success. Compare the amount of collateral damage in this war to any of those conducted in the 20th century.

Comment Comparing your accent to claimed residence history (Score 1) 255

He's doing the bare minimum sniff test of verifying that *you* are the guy whose name is on the bookings and not someone sneaking in on someone else's name who can't even pronounce the name on your fake id.

At least in the case of people claiming to be returning citizens I've been told that they're comparing your accent to your claimed residence (or residence history).

Different words are acquired at different ages, and many are pronounced with regional variations. An expert can talk to you for a few minutes and come up with a pretty good age-map of where you lived as you grew up. An agent with a modicum of training can detect a mismatch between how you pronounce certain words and your claimed residence and pass you through quickly or keep you around and drill more deeply. (If you now live in an area with a regional accent wildly different from where you grew up it can help to answer a where-do-you-reside question with "Footown, but I grew up in Barstate".)

I presume they are doing something similar, though no doubt with lower resolution, on the world-wide level for visitors from other countries.

Comment Just BS (Score 1) 49

In a basic sense, this is true
Not really it's just wrong. The one approach that came from Western cultures is the scientific method which is both objective (to the maximum extent any human method has yet achieved) and universal which is why there is no such thing as Chinese, Canadian or Indian etc science there is just science because it is universal. As you alluded to the scientific method has often (including now to some degree) found itself at odds with western culture so I would argue that the scientific method is a product of western culture but not part of it.

Arguing that it is "culturally situated" is nonsense. While science has definitely impacted western culture it has also impacted every culture around the planet and today there are scientists in every continent from a myriad of different cultures. Your culture may impact which questions you want to answer with science but, if you are doing it correctly, it will not affect the knowledge you find and that's why it is both universal and acultural. Indeed, the universal nature of science means it is one of the few things that can bring people of different cultures to work together towards a common goal: to understand the objective reality that we all share.

Comment Re:Legal Consequences (Score 1) 99

This won't stop the copyright holders suing but that way it's just money passing hands between big corporations, Sony and Disney vs OpenAI or Microsoft or Google or whoever else.

How's that going to work exactly? How will Sony know whom to sue if they contact me and I tell them I made the video myself? If they do not believe me they will have to sue me to get a name and what happens if the court does not believe me too? Even if I did make the video with some AI company's product, I'd be the one who made money by uploading it not that AI company so why are they the ones who have to pay?

You can't cut the creator out of the legal process so easily: they are the only one who knows whether the video used any AI and they are also the one potentially making money from it. It's clear though that the problem is out-of-control greedy companies: the artists are caught between AI companies who want to trample over copyrights and studios who will dump them the instant a much cheaper, photo-realistic AI actor is practical. At the same time moves to strengthen copyrights against AI will almost certianly be abused by the same studios to come after creators.

I agree that laws should treat humans and AI algorithms differently but for that to work you have to be able to distinguish AI vs human work and so far we can't do that with anything like sufficient reliability..

Comment Re: Selection pressure (Score 1) 96

It's two hours on the train from Sheffield, two and a quarter from Leeds.

Yes, provided that you can afford ~100+ quid for a ticket, live in Leeds near the station and the trains are all running on time. Even living close to Leeds like Harrogate, adds another 1+ hours each way without any other delays making a day trip much less practical especially given the extreme cost. That's also assuming that you are not arriving in London before 10am - if you are arriving before the cut-off the cost is 200+ quid.

So prehaps, if you are living in the middle of Sheffield, the closest city in Yorkshire to London and money is no object it's a day trip but for those not living near a station in a major city and whose budgets are more limited it is most definitely not.

Comment Not the Same (Score 3, Interesting) 18

It's not the same thing at all. In a tunnel diode the tunneling takes place at the microscopic scale. It would be like holding a (very weak for safety!) alpha particle source in your hand. All those alpha particles being emitted tunnelled out of a nuclear potential but the tunnelling took place at the nuclear scale.

The difference here is that the size of the quantum system was, itself, macroscopic - the circuit that had quantized energy levels and showed tunnelling was macroscopic. This was a significant result although I struggle a bit to see it as being at the level of a Nobel prize but at least it's better than last year when they gave the physics prize to a computer scientist!

Slashdot Top Deals

Credit ... is the only enduring testimonial to man's confidence in man. -- James Blish

Working...