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Submission + - Interesting Flash/DRAM hybrid technology

SWPadnos writes: This company (Unisantis) announced a "Shiny New Memory Technology". Their presentation on the technology is here.

Normally, I'd be as skeptical as anyone about whether it would ever get produced, and if so whether it will have much impact on the industry. Given that the inventor is also the person who invented NAND flash, maybe there's a better chance this time. They're claiming 4x density improvement over current DRAM (up to 64 Gb chips vs. 16Gb today), lower power and higher speed. They don't mention clock speeds though, only that certain operations (refresh, "erase") would operate on larger blocks, like flash.

Comment Re:Let's do some quick arithmetic (Score 1) 178

A couple of corrections to your estimate:

  • Water is exactly 1 metric ton per cubic meter, sand and mud are both higher density, close to double that. Source
  • They have two "suction dredges" onsite, one of which can remove 2000 cubic meters per hour. That's about 4000 tons per hour (96000 tons per day), per suction dredge. That's in addition to the other half dozen dredges they're using. The two suction dredges could have removed close to a million tons in 5 days (not that they were there for that long). Source

Comment Re:The Starcrossed (Score 2) 100

Anyone else remember "The Starcrossed", his satire on the TV industry? One of the elements of the book was that they developed the technology to digitally replace anyone on-screen with a synthetic computer simulation of that person. In the book they use it (IIRC) to bring a long-dead actress back to life... Of course, today we've seen Avatar and a host of motion-capture movies that have followed... Very much a case of life imitating art. When we get to the point where a commercially-available AI can "fill in" all the work currently done by the compositors and graphics artists and digital model makers and, presto, we can get rid of 90% of the entertainment industry. Instead of "Best Actor" we can have, "Best CGI software". We're nearly there already.

Or these movies:

Looker (1981), where models are 3D scanned so they can be computer generated in later productions.

The Congress (2013), which is a really trippy combination of weird virtual dystopia (like "Ready, Player One" on psychedelic drugs) and CG actors.

Comment Re:What storage does Green Mountain Energy use? (Score 1) 192

That is great news but I cannot find what kind of energy storage Green Mountain Energy uses when wind is not blowing and sun is not shining or how their customers cope with intermittent power. Does somebody know? Because if they borrow dirty energy from the grid and later return it back using clean energy then they do not provide clean energy overall. They provide clean energy sometimes and clean marketing otherwise.

I have heard of Green Mountain Energy, but hadn't really looked them up before. I don't think they own the generating stations (or at least not all of them) - they seem to be more of a broker with a mission. They support quite a few clean energy production sites around the country - wind, solar, and some "gas-to-energy" projects at dumps.

There seems to be a similar company (Green Mountain Power) which uses customer batteries as a backup for peeks (variable energy rate and the energy provider controls how your batteries are charged and discharged). No mention of a solution for longer term low output from wind/solar in their introductory web page. Only an unspecified claim "we will help you".

Who knows how this works?

Green Mountain Power is the power company for a lot of Vermont (I'm one of their residential customers). A lot of their energy comes from hydro or other clean power. They have several programs for clean energy, EVs, solar, and battery systems:

  • They had (and may still have) a program where you could choose to have your energy come from renewables. They charged a little more (maybe 1-2 cents/kWh), since at the time it was more expensive for them to buy "green" power. You could choose what percentage to get from clean sources as well, so it wasn't all or nothing. I don't know if they still have that program.
  • They had a pilot program where they basically gave away Tesla PowerWalls, with the caveat that they had the ability to pull some of the energy out of the battery during peak load times (yes, they paid you for the energy they took back).
  • They offer free level 2 EV chargers for anyone who buys a new (and maybe used) EV. I took advantage of that program, which was a nice $600 savings when my wife got her EV. They don't install the charger, so you either have to do it yourself or hire someone.
  • They now have lower rates available for EV charging. There are a couple of different options, where they give about a 25% discount on power, but they have the right to restrict charging during certain times. The options have slightly different rates and different definitions of peak times.
  • They have "net metering" for pretty much any form of home electric generation. In addition to that, there are several levels of extra payment for solar. The specifics of the program have changed progressively over the last 5 years - they used to send you a check if your account balance was positive, now they just roll it over for up to a year. When I installed solar about 4 years ago, they had a premium of ~5 cents/kWh. In other words, they pay an extra 5 cents per kWh for my solar energy compared to the price I pay them. That number has been going down every year (based on the year the solar setup is certified).
  • They have a couple programs like you mentioned, where they may pull energy from home battery systems (PowerWalls definitely, not so sure about EVs, since that requires specific EVs and charging systems). I think they give you a discount of some sort on power, and they also subsidize some of the cost of the battery system (at least for batteries that are charged only by solar) by giving a cash rebate when you install.

Overall, they do a pretty good job of providing clean energy options.

Comment Re: Gas is Too Cheap (Score 2) 334

Try covering 2000 miles in 3 days in an EV. Even the upcoming Model S refresh only has a 520-mile range. You could take 4 days to make the trip, but why should you allow your vehicle to force you into that? The current crop of EVs are even worse than that, with maybe a 300-mile range. I rode shotgun in a Model 3 once from Salt Lake City to Las Vegas; we made two stops of 30-40 minutes each to recharge, while in a normal car you might only need a 10-minute stop for gas.

(That "2000 miles in 3 days" wasn't a hypothetical. I drove that about a month ago, returning to Las Vegas from visiting my parents near Dayton, OH. The drive out to visit them was even longer: 2500 miles in 4 days, visiting friends along the way who were a little bit off the direct course. Day 1 of that trip ended in Bisbee, AZ (far southeast corner of the state), and the end of day 2 was over 800 miles away in Georgetown, TX (near Austin), with a whole lot of nothing in between. I'd be surprised if there were charging facilities sufficiently close along my route. Even gas stations were sometimes a bit sparse.)

The Bisbee to Georgetown route has a bunch of fast chargers available. A quick check at plugshare.com shows at least 9 locations along I-10 between Bisbee and Georgetown (assuming you don't backtrack to Benson, which also has one), not counting the dozens in the Austin area. That's just the ones that have 50KW or higher fast-charge systems, there are a lot more with lower charge rates. The span from Vegas to Phoenix would be the tough one for any EV with under 350 mile range - you'd need to take a somewhat longer route through Needles and maybe Blythe to find a fast charger. There's a station being built in Kingman though, so even that segment will be easier soon.

For the most part, there's a charger at about every second service area along interstates, and Wal-Mart is installing charge stations at many of their stores. My wife recently drove round trip from Vermont to Wisconsin in a Chevy Bolt (259-mile range, about 1200 miles each way), and most of her charging was at Wal-Marts or Electrify America charge points at rest areas.

It's only a little harder to go long distances with an EV than with an ICE now, and it's getting easier every day.

Comment Re: Strange device (Score 1) 145

You wouldn't directly execute from the external flash. The CPU can't fetch directly from SPI. You'd write a bootloader that copies code from flash into RAM and runs from there.

I didn't read the entire datasheet, but from the diagram, the chip does support XIP ("eXecute In Place") to run from internal flash. It's a dedicated QSPI interface, and 16kB of cache RAM in the XIP controller. That's actually a lot of code space, so in practice I'd expect most ISRs to remain in cache and execute with no penalty, and tight loops (the kind of thing you really want to run fast) would also mostly execute from internal full-speed RAM.

There would be a latency penalty to start executing "new" code, but that's about it.

Comment Re:That's a false dichotomy (Score 1) 297

To put it another way:

The Freedom of Speech is a wonderful thing, as long as we can ensure that no one is listening.

Even better: Freedom of speech is a wonderful thing, as long as it's coupled with freedom from speech as well. You can say what you want, but I don't have to stick around to listen to it.

Kind of like the oft-paraphrased idea "Your right to swing your fist ends at my face".

Comment Re:This is downright un-American (Score 1) 297

You're using the same line of reasoning that people used to enforce "no coloreds allowed" rules. Yes they are private businesses, but there are limits on discrimination in business. Political affiliation isn't currently a protected class, but it certainly should be, and a SCOTUS decision certainly could determine it to be so.

It's not his political affiliation that prompted the ban, it's what he said and how that fit (or didn't) with Facebook's rules.

Comment Re:Huh? (Score 1) 152

Isn't that mostly a matter of packaging? Outside of super-specialist hardware such as SOS, the chips themseleves would be the same.

Not entirely. You need to add compensation circuitry to things like current limiters if you need them to meet spec at extreme temperatures (automotive spec is from -40 to +125 C). Actually, that goes for pretty much anything analog, which includes all sensors, amplifiers, cameras, etc.

Comment Re:Huh? (Score 3, Insightful) 152

mostly agreed with you, except:

Underpinning all of this is the lack of vision that allowed semiconductor manufacturing to be concentrated in 2-3 locations worldwide. Business leaders in Europe and America should be absolutely ashamed for not caring how semiconductors underpin everything and allowing this critical technology to be moved outside of their borders, due to short-term financial concerns.

FTFY.

Comment Re:Separation (Score 1) 137

Is it a modern Bolt? Because this eMMC MCU issue only ever affected Model S/X and only up to 2018, and never was very common.

I suspect that her crashes are probably just a software bug. Sadly, a lot of people confuse "infotainment system crashes" with "all functionality on the vehicle crashes", which isn't even remotely accurate.

Yep, it's a 2020, purchased new in March of 2020. I'm thinking it's a firmware issue as well - there's no way this car is old enough to have any endurance-related issue yet. People do jump to (incorrect) conclusions, especially when Tesla is involved.

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