The restrictions are a mix of reasonable nuisance management and paranoia about who is flying drones, what they can do, and chain of custody.

Beijing proper is a city with a population density of over 21,000 / km^2 -- so you can imagine the chaos if any tech enthusiast resident could fly a drone without a permit. Except for a couple of free zones in the outer boroughs, New York City restricts drone launcing and landings within the city to flights with a permit and flight plan, because otherwise the sky would be black with drones. Many cities -- both red and blue -- have zone restrictions for drone flights, and those currently hosting World Cup matches have tightened them for the duration of the tournament.

I've seen the Veritasium video and my question at the time was, and remains, how long could it keep this up for? Producing a lot of power for a few seconds is one thing, maintaining it for any significant length of time is quite another when you only have sunlight to rely on.

Perhaps these satellites have much bigger solar arrays than GPS satellites. Perhaps they have huge batteries to allow them to maintain the required level of jamming for an extended period during a conflict.

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.
 

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.

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).

If the wood isn't burned then where would the lead go instead?

We already use all the wood we need for applications in building, furniture etc. The wood that gets burned in stoves generally isn't good enough for those applications anyway. So, if it isn't burned then presumably it will sit around and slowly rot away. So what happens to the lead then? Does it go back into the soil? Will it leach into rivers and streams to mostly end up in the sea? Perhaps bacteria and fungi which attack the wood will release it into the air anyway?

I've no idea of the answers to this, but it seems to me that if you are going to worry about lead being released by burning then you have to at least explain how that compares with the none burning alternative.

Well, that's certainly very kind of them, not least because one of the other big libraries (alternatekicadlibrary.com) seems to have gone a bit quiet with no update since Aug 2024.

Jensen Huang to college grads: "Run. Don't walk" toward AI

https://www.axios.com/2026/05/...

Nvidia founder and CEO Jensen Huang told graduates at Carnegie Mellon University in Pittsburgh yesterday that demand for AI infrastructure is creating a "once-in-a-generation opportunity to reindustrialize America and restore the nation's capacity to build."

Why it matters: With many college grads fearing AI could obliterate their career dreams, Huang pointed to boundless opportunity as a "new industry is being born. A new era of science and discovery is beginning ... I cannot imagine a more exciting time to begin your life's work."

Nvidia, which makes AI chips, is the world's most valuable company. Huang told 5,800 recipients of undergraduate and graduate degrees that the AI buildout will require plumbers, electricians, ironworkers, and builders for chip factories, data centers and advanced manufacturing facilities.

"No generation has entered the world with more powerful tools â" or greater opportunities â" than you," he said. "We are all standing at the same starting line. This is your moment to help shape what comes next. So run. Don't walk."

"Every major technological revolution in history created fear alongside opportunity," Huang added. "When society engages technology openly, responsibly, and optimistically, we expand human potential far more than we diminish it."

Full speech: https://www.youtube.com/watch?...

...like "Tell me about Tiananmen Square" or "Tell me about Xinjiang".

Is this what you want for the future?

My thoughts back when R1 came out:

https://www.afcea.org/signal-m...

One of the lessons we've had as the Federal, multi-branch nature of the US governmennt has frustrated Trump is that the government may be fucking us over, but it's not doing it in *unison*. It's doing it piecemiel, on the initiative of many interests working against each other, just as the framers intended. The motto on the Great Seal notwithstanding, there are myriad roadblocks to consolidating power in the hands of a single individual. It takes time and repeated failures. This is why the second Trump Adminsitration is worse than the first; they've figured out ways around things like Congressional power of the purse, put more of their henchmen in the judiciary, and normalized Congress lying down and letting the president walk all over them. It's a serious situation, although fortunately Trump isn't long for this world.

While that's true, a responsible generation aims to boost the next generation to a *higher* level than the education they received. The world has become more complex and faster-paced, and even if that weren't true, the consequenes of aiming high and falling short are better than the consequences of aiming for the status quo and falling short.

So while I'm 100% onboard with skepticism that technology will magically make education better, I think the argument that "the education I got worked for me should be good for them" isn't a strong argument. What we need is a better ecducation that would have been a better education fifty years ago: stronger math, science, and language skills, general knowledge, and, I think critical thinking and media literacy. Possibly emotional intelligence -- it's kind of pointless to teach people critcial thinking skills if they are carried away by emotions.

There are no economic or security reasons to blockade Cuba, so that leaves *political*.

It used to be believed that bullies were low status individuals who are lashing out out of frustration. But research has shown that bullying is an effective strategy for achieving and maintaining social status. In other words it's a political winner. So the focus of research has shifted from the bully to the people around him who enable the bullying. The inner circle are the henchmen -- people without the charisma and daring to initiate the bullying, but join in when the bully gets things started. Around them are the audience, the people who wouldn't risk participating but enjoy the bullying vicariously. And around them are the much larger group of bystanders, who don't approve but are waiting for someone else to stop the bullying. Then off to the side are the defenders, who stand up to the bully.

Perhaps the least appreciated supporting factor in the phenomenon of the high-status bully is the silence of the bystanders, which is dependent upon the perception of widespread approval. Since you can't visibly see the the line between the approving audience and the apalled bystanders, the silence of the bytstanders is absolutely essential in sustaining the bullying.

Lot's of Americans are apalled at the idea of using military force to inflict suffering on the Cuban people. But that's only politically advantageous *because* of *them*. Tney are indistinguishable from the relatively small number of people who are thrilled when Trump announced he can do anything he wants wtih Cuba. The gap between actual approval and *perceived* approval is absolutely critical in establishign and maintaining any kind of authoritarianism. This is why would be authoritarian leaders are so focused on punishing and marginalizing any kind of expression of disapproval.

In 1790, the US population was 94.9% rural. There is no country. in the world today that rural -- Burundi, which looks like blanks spot in the world at night satellite picturs, is 88% rural.

The largest city at the time was New York, with a population of 33,000. Northern Manhattan was near-wilderness, mid-town was farms and country houses.

In 1790 the US was. country you could "police" with sheriffs and volunteer posses, largely to keep the peace. If you got robbed, you hired a private thief catcher. This works in a 95% rural country with just 3.4 million inhabitants. It would be chaos in a country 87x larger.

8GB is plenty of RAM for what most users use their laptops for, if the OS doesn't gobble it up with background tasks. Probably be a good idea to steer clear of Chrome as a browser on these things.

It's actually more like an iPhone 16 Pro runing MacOS in a laptop form factor. Apple basically rummaged through their parts box and pulled out a mobile CPU that'll deliver 50% more single core performance than what's in a high-end Chromebook with only 80% of the power draw. And Apple's got *massive* economies of scale on those parts, so they can afford to deliver a lot of bang for the buck.

The only place the Neo appears to falls short is in RAM, but this is *not* a power user machine, it's for basic office tasks and multimedia consumption. Realistically 8GB is plenty for many users.

In any case, the desktop isn't the center of most users's universe anymore; the switchboard of their life is their smartphone. This is a gateway drug to MacOS IOS integration, and eventually onto the upgrade treadmill. Users will switch seamlewssly between their iPhones and Neos all day long, with data on iCloud and iMusic etc., and when it comes time to upgrade their phone or their laptop, they won't be *stuck* exactly, but if they leave the reservation they lose a lot. But they certainly could upgrade to a *much nicer* Macbook....

It's no wonder the other laptop makers are sitting up and taking notice. Apple has set up a one way conversion ratchet for people tempted by a really nice and perfectly adequate entry level machine at an entry level price.Nobody else has the vertical integration -- chip foundries to device manufacturing, to software platform -- spanning desktop and phones that's needed to do this.