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sephamorr

940 karma · joined January 18, 2017

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sephamorr··on Google’s Project Suncatcher to put ML infrastructure in space
The earth isn't exactly round, you can use this to process your orbit exactly 360deg/year so you can always stay in the sun. https://en.wikipedia.org/wiki/Sun-synchronous_orbit
sephamorr··on Photon-Emission-Guided Laser Fault Injection Enables RP2350 Secure Debug
"Important" and "tamper proof against a determined adversary" are very different goals.
sephamorr··on 'Offensively cheap': solar power is looking up
For a residential setting, installation quality probably dominates, and I doubt country of origin is statistically significant. Otherwise look at warranties which specify a performance curve over lifetime (generally 25y, also some are independently guaranteed by an insurance company that might actually survive that long). There are public performance datasets from NREL, TUV, but be careful about choosing representative examples (e.g. utility scale reliability is different from rooftop)
sephamorr··on So you want to use plants to reduce CO₂
I haven't installed one yet, but plan to in my house. I'll probably end up buying an assembly, but they seem pretty spendy for what is really a very cheap BOM.
sephamorr··on So you want to use plants to reduce CO₂
I think what you really want is an Energy Recovery Ventilator. It cycles in fresh air and uses an intercooler to limit the heat and humidity loss.
sephamorr··on An ESP32 based plane radar for my desk
I would actually expect the math to decode ads-b traffic is substantially less complex than, for example, a TLS connection.
sephamorr··on Africans Are Turning to Starlink
The max steering angles of the phased arrays are much higher, the diameter is at least 10x what you say. And for the last few years, lasercoms can route traffic inside the constellation so a given sat doesn't need to be within sight of a ground station.
sephamorr··on CT scans of BYD car parts
On the platforms I've worked with, the weight isn't the issue so much as the quantity of expensive and vibe sensitive parts that are unsprung.
sephamorr··on Blue Origin's New Glenn blows up during static fire test
The doubt is supposed to stay with you! You need to make sure there aren't other causes or contributing factors hiding behind 'the obvious'. There have been notorious cases in spaceflight where the issue was 'identified' and 'fixed', only for the same thing issue to happen in the next mission.
sephamorr··on Southwest Headquarters Tour
This is correct. If you don't like heights, that's definitely not a reason to skip the tour, but you'll miss out on one piece (that I enjoyed).
sephamorr··on Southwest Headquarters Tour
Seconding this! Make sure you get the "special tour". It was an absolute highlight of my trip. If you are interested in power infrasture it's a must see. If you're afraid of heights, perhaps not so much.
sephamorr··on Let's Buy Spirit Air
JetBlue is a small rival (JetBlue at ~5% of US traffic, Spirit at ~3%) to the big 4 United/American/Southwest/Delta (each with ~17%). At least on the surface, a larger JetBlue might be more competitive rather than forcing them into the unequal partnerships like they have with United at the moment. Certainly, some jobs would be lost, but I do think that Spirit dying is a worse outcome than joining another small airline.
sephamorr··on Artemis II is not safe to fly
This is actually what is thought to partially have caused the damage seen previously. The new trajectory is supposed to just have a single heating pulse instead of two.
sephamorr··on China is mass-producing hypersonic missiles for $99,000
Well, the IRGC folks actually fighting probably don't have a luxurious future in a reformed Iran, so they might not be far off fighting for their lives.
sephamorr··on iPhone 17e
The phones get larger and the UI gets less information dense every release. More padding, more offsets, more dead space.
sephamorr··on FDA declines to review Moderna's mRNA flu shot
The document describes proof of effectiveness as supported by demonstrating "non inferiority to... a US licensed product". So yes, a (licensed) benchmark, but I see no references to a requirement for only testing against the best standard of care. It's a separate question about whether it should be though, and the cfr is quite vague throughout, so I would probably expect this isn't an illegal move (assuming arbitrary and capricious isn't held by a court), but I don't see it supported by precedent.
sephamorr··on FDA declines to review Moderna's mRNA flu shot
Except this is not how medical regulation has worked in the US. This particularly is a new and stricter standard required for this particular vaccine. Even the new Trump policies for COVID vaccines now specifically requires a placebo -- comparison against standard-of-care would not be accepted.
sephamorr··on Court orders restart of all US offshore wind power construction
Well, that's not 'mostly done'
sephamorr··on Significant US farm losses persist, despite federal assistance
The point is that it's a technical criteria that allows you to exclude American production from Europe. It's just protectionism.
sephamorr··on The U.S. Is Funding Fewer Grants in Every Area of Science and Medicine
Citation needed
sephamorr··on US Administration halted largest Offshore Wind project in the U.S.
You say economics instead of emotion, but your last sentence is emotion. If capex is your concern, explain the purpose of canceling an almost-complete farm. If energy breakevens are your concern, explain how this breakevens compares against, e.g. oil liquids.
sephamorr··on The "Wage Level" Mirage: H-1B proposal could help outsourcers and hurt US talent
In their defense, if "things get bad", they probably lose their job and will be forced to leave. It's hard to put down permanent roots if you can be kicked out in 90 days.
sephamorr··on Trevor Milton's Nikola case dropped by SEC following Trump pardon
I had the same thought as GP though, thought it was very clever.
sephamorr··on Things you can do with a Software Defined Radio (2024)
There have been numerous issues in the past with 'dead' satellites waking back up and activating transmitters again, generally making a mess of the spectrum. Some satellites have pyro-fuses on the power lines from the solar arrays that are fired during passivation to make absolutely sure that the sat doesn't ever recharge and wakeup.
sephamorr··on Starship's Tenth Flight Test
"significant" is doing a lot of work here. spaceX appears to have spent ~$10B on development and infrastructure for Starship so far. NASA has been invoiced for ~50% of their $2.9B contract, so the taxpayer has paid ~15%.
sephamorr··on Starship's Tenth Flight Test
The vast majority of CEOs keep quiet about their politics so it doesn't become a problem.
sephamorr··on US economy shrank 0.5% in the first quarter, worse than earlier estimates
So you employed 45 employees to do assembly work but bought each of 2000 parts one at a time so the processing fees were meaningful? Surely if the revenue supports that staffing, you should import by the pallet or container?
sephamorr··on Taking a look at the next generation of telescopes
Sounds a lot like it's 1000inches!
sephamorr··on Driverless semis have started running regular longhaul routes
My previous company, Parallel Systems is working on this. The solution looks a lot like trucks on rail: individual locomotion, so you get the flexibility of trucking, but the energy efficiency and automation ease of rail. With modern braking, you can stop a Parallel vehicle about as fast as a truck. There's a ton of rail that's underutilized, particularly in Metro areas, so you almost get a fresh highway for free. Vehicles can platoon or separate at will.
sephamorr··on AT&T Email-to-Text Gateway Service Ending June 17
I have years wondering why this happens from select iPhones from time to time, without any luck figuring it out.
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