jaywee · HackerTrans

4 か月前議論

I think one of the reasons for this is to have very high throughput charging stations in dense urban areas (like central Beijing).

jaywee

6 か月前議論

> "we have to cater to what 96% of users know" Indeed. Just recently saw a talk "Are we stuck with the same Desktop UX forever? | Ubuntu Summit 25.10" (https://www.youtube.com/watch?v=1fZTOjd_bOQ) where Scott Jenson (Apple/Google UX) laments we stopped innovating on Desktop.

Such appeal to conformity is indeed quite sad from GNOME.

jaywee

7 か月前議論

Jonathan McDowell keeps track of all the Starlink Sat orbits, including failures:

https://planet4589.org/space/con/star/stats.html

jaywee

7 か月前議論

Don't confuse launch _price_ with launch _cost_. It's been estimated the internal F9 launch costs are around $15M-$20M.

The $5M is a marginal cost-target for fully reusable Starship.

jaywee

7 か月前議論

Quite helpful infographics from ULA: https://blog.ulalaunch.com/hubfs/orbital%20debris.jpeg

jaywee

7 か月前議論

Well, divide et impera. Fairly straightforward for AI inference (not training): The existing Starlink constellation:

3491 V1 sats × 22.68 m² = 79176 m²

5856 V2-mini sats × 104.96 m² = 614 646 m²

Total: 0.7 km² of PERC Mono cells with 23% efficiency.

At around 313W/m² we get 217MW. But half the orbit it's in shade, so only ~100MW.

The planned Starship-launched V2 constellation (40k V3 sats, 256.94 m²) comes out at 10 km², ~1.5GW.

So it's not like these ideas are "out there".

jaywee

昨年議論

Ideally, in an organization this should be a centrally pushed group policy defining CIDRs.

Like, at home, I have 10/8 and public IPv6 addresses.

jaywee

2 年前議論

Yeah, I had to create a user on many language versions just to keep the old skin. I fail to see a point in wasting 2/3 of my screen estate to whitespace.

jaywee

2 年前議論

Having a 60 days consultation with the Fish and Wildlife Service whether a falling hot-stage ring (essentially dumb steel piece) causes danger to fish is just silly.

jaywee

2 年前議論

Have multiple explicit ones. One liberal, one conservative, one progressive...

jaywee

2 年前議論

Not the first case - It was Kodak who built the first digital camera after all.

jaywee

2 年前議論

NTR is a very inefficient use of nuclear fuel. What you want is a NSWR: https://en.wikipedia.org/wiki/Nuclear_salt-water_rocket

A true nuclear rocket. Just like a chemical rocket is a controlled explosion, NSWR is a controlled (cough) nuclear explosion.

jaywee

2 年前議論

Sun wanted to do the same thing in late 90ties - picoJAVA (embedded), microJava and UltraJava (VLIW workstations).

Relegated to the dustbin of history.

jaywee

3 年前議論

It can be - the allocator just needs to mmap() different bucket pools to different base addresses.

jaywee

3 年前議論

In May SpaceX reported they have 1.5M subscribers. At $100/month, that's $1.8B/year revenue. Not bad.

jaywee

3 年前議論

Impulse Labs, a startup, is doing lithium-backed kitchen stoves. Claims to heat-up 1L of water in ~40secs. That's at least 8.6kW.

https://twitter.com/sdamico/status/1592553611879673856?s=20

jaywee

3 年前議論

The 400V is between phases. 230V is between a phase and ground. Ie, you get 3 wires (phases) of 230V from the 400V connection.

Btw, Europe standardized at 230/400V in the nineties. In Czechia we switched from 220V to 230V in 1993. Not sure when Italy did, but probably around the same time.

jaywee

3 年前議論

>That's where we're at: Just randomly select some parameters until the data fits, and lo and behold, it fits.

When I read that it felt like a Monte-Carlo simulation. A legit approach in modeling. And indeed - the link to the paper: https://arxiv.org/abs/2304.09895

https://en.wikipedia.org/wiki/Monte_Carlo_method

jaywee

4 年前議論

Here's a thought from a former Twitter dev on timeline-vs-top: https://social.lot23.com/@jon/109372257422277945

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