Recent submissions

Comment · 1 month ago
Is it the case that those that want to learn, will learn at a hugely increased rate, and those that don’t, will not learn anything.

I used to hate history class in high school. The teacher was crap, the subject matter (basically kings and queens of England in the 1200-1700 era. We didn’t even cover ww2 in high school which was amazing to me.

Having access to YouTube, and endless access to whatever angle of history I want, I can’t deep dive to whatever I want.

YouTube, and AI chatbots totally enthrall me and I as an old adult am learning so much more than I was as a child, and its because I want to.

Comment · 2 months ago
Comment · 3 months ago
Totally agree with you on ‘putting stuff away’. Much of the mental effort is trying to organize stuff so it takes space efficiently, and be easy to find it when I need it. If a robot put it away, I don’t really care where. I can just ask it where it is.
Comment · 3 months ago
Global cellular operator revenue is approx $1T. They have put their toe in the water with direct-to-cellular support for starlink, and have bought spectrum to improve this. I'm sure they basically want to offer cellular to everyone in the world and get a good chunk of that $1T. Maybe they want 20% of it? Sounds crazy, but China Mobile, Verizon, and Deutsche Telecom each have 10%. Sounds it's not so wild that they can grab a big chunk, especially if they can find new customers that are not already connected.

And of course they can also continue to grow their broadband internet access business.

I suppose they will likely start putting cameras and other data sensors on the satellites so they can sell other data for mapping, positioning services, agriculture, weather, etc. The incremental cost to add this to the platform will be almost nothing compared to existing systems.

Comment · 4 months ago
Once in a while I get inspired by a post on HN, but I know I don't have the energy to follow it through. Here's my idea for anyone who thinks they can do something with it:

Imagine you are holding in your hand a small glassy sphere. Initially it looks like random dots inside, but as you play with it in your hands, you get glimpses of images of loved ones.

To implement this, select a bunch of photos of people, generate pseudo-3d models of their faces with your AI of choice. Position them around a sphere in a 3D modelling software, and generate a whole bunch of renderings all around the scene. Now, feed those renderings into gaussian splat software.

The resulting 3D gaussian splat should include relatively high fidelity when the viewer is aligned with the supplied iamges, but more stochastic nonsense when misaligned. This should contribute to the feeling of being able to 'find' images while rotating the sphere around.

Comment · 5 months ago
Comment · 5 months ago
Comment · 7 months ago
The Los Angeles Aqueduct delivers water to LA.

The California Aqueduct is used for farmland in the central valley.

Two different things.

Comment · 9 months ago
Surely, the question is: how big do the radiators have to be?

gemini says that the NVIDIA DGX H100 is 130kg and takes 11kW.

It says space-based radiators in the 100kW range are approx 15kg per kW. And space-based solar panels are approx 1kg per kW.

So let's says we're talking about 1 system that bundles 9 DGX H100's. That's 1.2T for the computing system, 1.5T for the radiator, 100kg for the solar panels, and let's say 2T for the propulsion, propellant, guidance, and all the other spacecraft stuff. That's a total of about 5T, and the radiator is just about 20% of the mass budget.

The power radiated is proportional to the 4th power of the temperature, so they would be incentivized to develop a heat exchanger with a high temperature working fluid.

Comment · 10 months ago
It will be used for spatial content, for viewing in Apple Vision Pro headset.

In fact you can already turn any photo into spatial content. I’m not sure if it’s using this algorithm or something else.

It’s nice to view holiday photos with spatial view … it feels like you’re there again. Same with looking at photos of deceased friends and family.

Comment · 1 year ago
> Access old ideas? Yes. With new perspectives?

I wonder if we can mine patent databases for old ideas that never worked out in the past, but now are more useful. Perhaps due to modern machining or newer materials or just new applications of the idea.

Comment · 1 year ago
Trex makes composite decking planks from recycled shopping bags. Seems like a perfect use for the material. Its durable. It doesn’t have to be sterile or pure. Apparently 100,000 bags will go into a typical deck.

https://nextrex.com/

Having said that I don’t see what’s wrong with incineration if it’s done correctly. It’s not open pit burning, with waste gases going into the environment. It’s high temperature, with additional gas and oxygen to promote more complete burning. And waste gases are filtered.

Comment · 1 year ago
They just a hyphen. The motto used to be pollution-free for all!
Comment · 1 year ago
I don't get why everyone keeps talking about the planets aligning. All the planets are pretty much in the same plane. So if you are on one of the planets, all of the others will always be in a line.

edit: to those downvoting me, can you explain why?

Comment · 2 years ago
Methane derived from co2 and h2o with solar energy is not a fossil fuel. Methane from the ground is a fossil fuel. Casey is going after industry that has a lot of inertia behind methane with a non fossil derived methane.

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