Hacker News: marze

New comment by marze in "Tesla’s 4680 battery supply chain collapses as partner writes down deal by 99%"

marze — Mon, 29 Dec 2025 19:56:51 +0000

"Tesla, where we make the impossible late"

New comment by marze in "Ask HN: What Are You Working On? (December 2025)"

marze — Mon, 15 Dec 2025 04:39:29 +0000

Astrophysics

New comment by marze in "A supersonic engine core makes the perfect power turbine"

marze — Tue, 09 Dec 2025 18:57:16 +0000

If China had "no regulations" and was building out 100% coal, no one would be worrying that China industry would have an advantage due to low electricity cost vs rest of world.

New comment by marze in "Trillions spent and big software projects are still failing"

marze — Wed, 26 Nov 2025 20:48:32 +0000

So I haven't looked through the comments, and assume this has been discussed, but the simple solution is to limit contracts to, say, $4M, and pay only on successful completion. Then build a large project through a series of smaller steps.

New comment by marze in "The Perplexing Appeal of the Telepathy Tapes"

marze — Tue, 11 Nov 2025 19:10:01 +0000

I was interested to learn recently that Alan Turing believed telepathy was a real thing. At least that is what someone wrote.

New comment by marze in "Analysis of Hedy Lamarr's Contribution to Spread-Spectrum Communication"

marze — Mon, 10 Nov 2025 18:14:23 +0000

To me, the interesting question is, were they the first to come up with the concept of communicating while jumping around on a random-like sequence of frequencies. What was the prior art?

New comment by marze in "These Men dove to the Edmund Fitzgerald shipwreck decades ago. Their stories"

marze — Mon, 10 Nov 2025 17:57:27 +0000

It may have been 15 minutes to both go down and explore, it mentioned 4 minutes at the bottom. The quote: "15-minute descent and exploration"

New comment by marze in "Why Sam Altman Won't Be on the Hook for OpenAI's Spending Spree"

marze — Sat, 08 Nov 2025 16:25:16 +0000

It will be interesting to see who owns all the compute hardware in a few years, that cost billions now, and what becomes of it. With an expected useful lifetime so short the depreciation rate is insane.

New comment by marze in "Analysis of Hedy Lamarr's Contribution to Spread-Spectrum Communication"

marze — Sat, 08 Nov 2025 05:27:01 +0000

I find the article unconvincing, although I'm open to being convinced. With historical hindsight, it should be easy to see if the Lamarr et al patent seems novel. Just because an examiner doesn't allow a claim, I don't see that as strong evidence it wasn't novel at the time. They always are rejecting claims, sometime for good reason, sometimes not.

A more convincing article would focus on purported prior art patents, and let the reader judge if really anticipated frequency hopping.

New comment by marze in "Leatherman (vagabond)"

marze — Sat, 20 Sep 2025 08:05:36 +0000

It might just be that there are a lot more cheap pizza locations than fancy ones.

This fellow also stays with friends.

New comment by marze in "Leatherman (vagabond)"

marze — Fri, 19 Sep 2025 15:57:28 +0000

My brother has a friend who is the modern day equivalent. He travels North America by bike, eats pizza from cheap pizza restaurant dumpsters.

New comment by marze in "Solar power has begun to transform the world’s energy system"

marze — Tue, 15 Jul 2025 21:18:35 +0000

Once there are 50M electric cars parked here and there, the solution will be even more obvious.

New comment by marze in "Preliminary report into Air India crash released"

marze — Fri, 11 Jul 2025 23:28:48 +0000

Also, it took 10 and 14 seconds to switch them back on. If it was an accidental switch, you would think it would have been quicker to switch them back.

New comment by marze in "Preliminary report into Air India crash released"

marze — Fri, 11 Jul 2025 23:18:03 +0000

You mention "brain fart". There is certainly a long history of pilots selecting the wrong lever, or wrong switch. So, it is possible the pilot who denied switching the fuel off thought he had switched something else.

New comment by marze in "Solar power has begun to transform the world’s energy system"

marze — Fri, 11 Jul 2025 03:22:00 +0000

As in, "an electric vehicle fleet that charges during the day and powers the grid at night if the owner opts in"?

New comment by marze in "Solar power has begun to transform the world’s energy system"

marze — Thu, 10 Jul 2025 17:43:44 +0000

Transmission lines are a interesting idea, but expensive.

Once solar is cheap (like now, as it already is), you can put in 3x what is needed on a sunny day, and power everything on cloudy days. Solar runs on cloudy days. Night obviously requires a different solution. Start by installing solar over all parking lots.

To think that you won't be able to run a 100% solar/wind grid is a bet against human ingenuity. If generation in excess of peak demand was installed of solar/wind, there are many promising approaches to deal with generation shortfalls. Batteries, load shifting, an electric vehicle fleet that charges during the day and powers the grid at night if the owner opts in, precooling a home with AC during the day to a low set point so AC isn't needed at night, H2 storage in salt caverns, pumped hydro, aluminum smelters that operate during excess power periods, the possibilities are infinite.

It won't be hard. Don't bet against human ingenuity.

New comment by marze in "A Review of Aerospike Nozzles: Current Trends in Aerospace Applications"

marze — Fri, 27 Jun 2025 23:02:50 +0000

Against the cost of a lower payload fraction. Say you get 4% with TSTO, 2% with SSTO. And if you run into trouble with the design, the SSTO payload moves towards 0%. Your operational savings need to compensate for a doubling of cost per unit mass payload, possibly much more.

And even though full reusability is much easier with two stages, and has not been achieved yet.

New comment by marze in "Ada and SPARK enter the automotive ISO-26262 market with Nvidia"

marze — Thu, 05 Jun 2025 19:26:52 +0000

References?

New comment by marze in "Ada and SPARK enter the automotive ISO-26262 market with Nvidia"

marze — Thu, 05 Jun 2025 03:13:33 +0000

Wasn't a correlation with elderly drivers and the unintended accretion found in the Toyota cases?

New comment by marze in "My quest to make motorcycle riding that tad bit safer"

marze — Wed, 07 May 2025 18:46:47 +0000

A legal mandate should be made to require this on all motorbikes.