Andrew Côté

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Andrew Côté

Andrew Côté

@Andercot

engineering physicist, writes about deep tech, physics, energy, sci fi and whatever. founder @hyperstition_x produces @deeptechweek

San Francisco Katılım Eylül 2012
1.7K Takip Edilen131.6K Takipçiler
Andrew Côté
Andrew Côté@Andercot·
How about we all work as hard as we can at this, the most pivotal time in history.
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Andrew Côté
Andrew Côté@Andercot·
@Dylan_Morri If you combine RF eng and Turbo Eng you get someone who designs the AC motors connecting turbomachinery to the grid
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Dylan Morris
Dylan Morris@Dylan_Morri·
Elec Eng : RF Eng :: MechE : Turbo Eng
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teo — e/acc
teo — e/acc@phteocos·
THEREFORE I CHALLENGE @Andercot TO TALK ABOUT THE RELATIONSHIP BETWEEN RELATIVISTIC JETS AND CHAOSKAMPF
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Andrew Côté
Andrew Côté@Andercot·
im sure its nothing tho
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Andrew Côté
Andrew Côté@Andercot·
It's almost like there is a dark cabal bent on tearing down western civilization with assassinations, blackmail, propaganda, leveraging vice, sin, inflation, suicidal empathy and campaigns of mass fear and terror designed to deprive citizens of their civil liberties.
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Liminal Warmth ❤️‍🔥
Liminal Warmth ❤️‍🔥@liminal_warmth·
What the F This is the coolest thing I’ve seen today and it’s blowing my mind
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Andrew Côté
Andrew Côté@Andercot·
@whatep do you understand your profile photo looks like the gay illuminati
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Andrew Côté
Andrew Côté@Andercot·
Interesting that there is such a thing as "anti-entropic force" and it is basically "whatever intelligent life is trying to do" and that this is somehow fundamentally connected to the forwards arrow of time.
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Andrew Côté
Andrew Côté@Andercot·
we are basically eukaryotic wasteland mutants that act as gene-vaults for horizontal viral transfer between species of cyanobacteria descendents
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Andrew Côté
Andrew Côté@Andercot·
Earth's entire biology is built on Oxygen, the nuclear fallout of an ancient war which occurred 2.4 billion years ago between cyanobacteria and anaerobic microbes. Cyanobacteria extinguished most Life on Earth in this war by trading protein and DNA stability for metabolic rate
Andrew Côté tweet media
Andrew Côté@Andercot

Seems entirely possible Life on Earth was accidentally seeded by some super advanced nanobot weaponry from the Great Galactic War that made the night sky quiet. Probably a bunch of nascent civilizations about to encounter empty Ark ships and abandoned wormhole networks etc

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Andrew Côté retweetledi
Missileman
Missileman@MinuteofZombie·
So, on a daily basis I am adjudicating space rating part selection decisions for space vehicles. There’s a giant unresolved problem with orbital AI data centers no one talks about and quite possibly extremely few even know about. Commercial AI accelerators are designed for terrestrial soft-error environments, not trapped belt protons/electrons, solar energetic particles, galactic cosmic rays, heavy ions, South Atlantic Anomaly transits, charging, or cumulative ionizing dose. SEE is an electrical and functional disturbance in a circuit caused by a single proton or heavy ion near a sensitive circuit node, and includes SEU, SET, SEFI, SEL, SEB, and SEGR. TID is cumulative absorbed ionizing dose that causes parametric degradation and eventual failure. TID can be shielded. SEE can’t. The core issue is that AI data-center chips are almost the worst possible class of electronics to fly casually. SEE is probably the nastier problem than TID for orbital AI compute. TID is cumulative and can be margin managed with shielding, orbit selection, derating, annealing, and part screening. SEE is stochastic, workload dependent, and can produce silent data corruption, node crashes, destructive latchup, or power-converter failures. High end AI datacenter parts are intrinsically poor candidates for unmodified orbital survivability against SEE, especially compared with radiation-hardened spacecraft electronics. High performance commercial parts are not designed, rated for tested to be space rad hard and it’s not a simple modification. There is an entire parallel industry built around space rated compute. It’s an entirely different architecture. Unlike TID, SEE cannot be meaningfully shielded. And the biggest problem is not just “small transistors.” GPU, TPU, and ASICs have enormous transistor counts, large SRAM/cache, massive clock/power domains, high-speed interconnects, and many internal finite state machines susceptible to SEU/SET/SEFI. Thousands of devices that can fail and propagate errors. Nothing is designed to be fault tolerant. For AI data centers, the failure metric is not “does one chip survive?” but “can a cluster of millions of high power COTS devices keep producing correct compute without silent corruption?” A single upset may be corrected. A GPU control SEFI may reboot a card. A latchup in a regulator can kill a board. A solar particle event can create these correlated faults across many nodes. DRAM will throw bit flips hourly at LEO. ASICs and TPUs die in weeks. A cluster dies in months but is heavily degraded within weeks. In polar, days to weeks. At MEO or above, the entire machine dies in hours. I’ll say this for the third time because I am sure someone will miss it: You can’t shield SEE. It has to be mitigated by part design.
Ezra Feilden@ezrafeilden

There's a huge risk to orbital datacenters which I'm surprised I haven't seen discussed anywhere. All SSO datacenter operators need to align their orbital direction: strictly prograde (dusk-dawn) or strictly retrograde (dawn-dusk). If even a small number of players decide differently from the rest then head-on collisions are essentially guaranteed. A single collision would release 40 tons of TNT, quickly turning this very special orbit into a debris field. The good news is - the solution is very simple. There are few benefits of mixing dawn-dusk with dusk-dawn. Everyone just needs to choose dawn-dusk. Starcloud is working hard to make this happen. DM me if you are a dawn-dusk SSO user and would like to help.

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Richard Geldreich 🇺🇸
@Andercot who would have thought that strapping overpriced ski goggles with mini monitors that make many people sick wouldn't catch on
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Andrew Côté
Andrew Côté@Andercot·
The absolute non-takeoff of VR and AR is probably one of the big upsets in consumer electronics history Pretty much everyone thought this would be huge and it sort of just isn't
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Andrew Côté
Andrew Côté@Andercot·
When you have AI work for you, a conversation between teams becomes different parts of your brain talking together. The barrier between intent and execution seems to fall away entirely, there is no meeting, no morale, no miscommunication The next chokepoint is interface, BCI
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Andrew Côté
Andrew Côté@Andercot·
Seems entirely possible Life on Earth was accidentally seeded by some super advanced nanobot weaponry from the Great Galactic War that made the night sky quiet. Probably a bunch of nascent civilizations about to encounter empty Ark ships and abandoned wormhole networks etc
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Jay Anderson
Jay Anderson@TheProjectUnity·
How much money would be enough for you to feel secure for life?
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Avi
Avi@AviSchiffmann·
@Andercot People barely want to wear glasses to SEE
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Bikram Singh Roy
Bikram Singh Roy@RudraR111·
@Andercot @xai Are helium xenon combustible? Turbomachinery is driven by extracting energy from the working fluid. How do you plan to impart energy on the helium xenon working fluid, firstly?
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Andrew Côté
Andrew Côté@Andercot·
Single-crystal nickel turbine blades are the bottleneck for mass producing efficient turbomachinery A closed-cycle Brayton engine with Helium-Xenon working fluid doesn't expose blades to combustion products Few hundred degrees cooler, recuperation cycle problem solved @xai
Object Zero@Object_Zero_

Did you know… The 1978 NASA mini-BRU (Brayton Rotating Unit) and the Garrett Racing Turbocharger, are actually the same technology? Can you guess which is which in the images? Did you know that the mini-BRU is a compact power conversion system developed for space applications intended to be paired with a nuclear isotope heat source? Mini-BRU was designed to circulate Helium-Xenon in a closed loop with a Plutonium 238 heat source. The mini-BRU was 88% efficient which is much more efficient than the 12% efficiency achieved by the Radioisotope Thermoelectric Generator RTG. RTG flew, mini-BRU did not. But what’s also cool is that Garret Racing turbochargers use the same turbomachinery impellers as the mini-BRU, and not a lot of people know that. Why would anyone know that? Anyway, mini-BRU is actually a viable power conversion technology. It’s fairly accessible and can be put together, and is probably a great power conversion technology for some particular applications. Partly because it is constructed from systems, subsystems and components that car factories can build (quite literally the Anduril-method-solution to a growing industrial bottleneck), but also because it is a Brayton machine. Turning heat into electrical energy is a fun problem, people think it is solved and that boiling water is the way to go and that this is proven and the best way to convert heat to electrical power. Steam is OK, but it’s not that hot and the biggest part of a steam Rankine cycle sucks. Brayton cycles are hotter (and cooler), and if you run them closed and politely and without combustion they’re kinda easy. If you know your technical and industrial history and you know where to look, and who to talk to, the future is already here, and in many cases it’s been here for decades, it just isn’t evenly distributed because every bozo wants to buy the mainstream thing and only misfits and weirdos ready old NASA manuals and Soviet rocket papers. But if you want to actually solve things, and build things, you can do incredible things with stuff that is already here.

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