Meegul · HackerTrans

5 maanden geledendiscuss

The revolutions podcast is perhaps one of my favorite podcasts of all time. The American, French, and Russian revolution seasons are all incredibly enlightening to the world that we live in, while plainly also being just so entertaining.

Meegul

6 maanden geledendiscuss

    ________________________________________
  / "We report here our experimental        \
  | demonstration of flexible egocentric     |
  | tooling in a pet cow (Bos taurus),       |
  | Veronika, who uses a deck brush to self- |
  | scratch. Across randomized trials, she   |
  | preferred the bristled end but switched  |
  | to the stick end when targeting softer   |
  | lower-body areas. This adaptive          |
  | deployment of tool features reveals      |
  | multi-purpose tool use not previously    |
  \ reported in non-primate mammals."       /
    ----------------------------------------
           \   ^__^
            \  (oo)\_______
               (__)\       )\/\
                   ||----w |
                   ||     ||

Meegul

6 maanden geledendiscuss

Very interesting to watch, though I don't really have a great idea of what's going on most of the time. Performance seems to be fairly poor despite my system being pretty beefy (Ryzen 9 7950x3d). I see the performance monitor and notice that the render loop seems to fairly regularly exceed the latency for 60fps, despite this being a 'simple' task by modern standards. I'd give more helpful feedback as to why, but the minified code makes it hard to say.

Do you plan on monetizing this somehow? If not, open sourcing some, if not all, would be pretty cool, even if it weren't necessarily licensed in a way that others could 'take' it, if that's your concern. Nonetheless, a very cool project.

Meegul

9 maanden geledendiscuss

Ha, good catch. I stared at that sentence for a few too many minutes as I wrote it because I knew it just didn't sound right.

Meegul

9 maanden geledendiscuss

The battery pack contactor is one of the only, if not actually the only, moving pieces in a battery pack. A solenoid connects or disconnects the battery pack from the rest of the car's electronics. In this case, it seems to fail in the open state, meaning the battery was not able to power the car. Either there was simply a bad production batch of these particular solenoids or a change in supplier for this part.

Model Ys still have a separate, standard 12V battery that power many of the car's non-drivetrain related parts. So in this case, the battery pack contactor failing open would cause the car to lose the ability to drive, but the doors/windows/lights/screen would all still likely be working.

Meegul

2 jaar geledendiscuss

This is only true on the energy and transportation sides of emissions. Some processes like the creation of cement and refining of steel create CO2 through chemical processes, regardless of the energy source.

Meegul

2 jaar geledendiscuss

357 - Chrome with extensions

511 - Chrome without any extensions

433 - Clean firefox install

500 - Clean edge install

On an AMD Ryzen 7950X3D / 5600MHz RAM

Interestingly, I got substantially different results depending on whether I used chrome with my typical extensions or not. Looking at the flamegraph, I don't seem to see the full picture of why there's such a substantial difference. Bitwarden/React Developer tools (the 2 primary extensions I use) don't seem to make enough of an impact to account for the roughly 40% performance increase seen without them. The browserbench javascript accounted for ~38.6% of the overall time taken for the benchmark, but the sum of my extensions was only 6.5%. I'm not incredibly familiar with browser performance profiling, so there's probably more to the story.

Meegul

3 jaar geledendiscuss

Are you doing this profitably? If so, does that entail owning your own hardware or renting from cheaper services such as Lambda?

Meegul

3 jaar geledendiscuss

I understand where that sentiment comes from, especially looking at the slew of mid-sized companies that have never turned a profit despite paying multiple hundred K TCs, but if you look at the profits of the giants, it paints a different picture. The labor of thousands of very highly compensated engineers is still a drop in the bucket of the revenue generated by their labor. Alphabet seemingly employs somewhere between 20-40 thousand engineers, and it is their labor that produced all (?) of their revenue generating products. Spreading last year's revenue (~$282B) across their engineering staff would yield a revenue in the ballpark of $9M per engineer.

We all know that their engineers are paid well, but that's still potentially more than an order of magnitude off of the value they generate. Of course, there are many other expenses to running their business, but to claim that broadly developers are overvalued when one of the most prolific employers of developers is generating 10x+ the revenue of what they spend on them, is likely no more than only occasionally correct.

Meegul

3 jaar geledendiscuss

I don't think OP is being overly negative in relation to the tone of the rest of the comments here. Nobody else up until this comment had mentioned anything about the actual important performance characteristics that the paper's authors' are claiming, and this does put it into perspective with the current state of the art. And OP does even end on an optimistic note anyway. No need to resort to personal attacks.

Edit: I appreciate you toning down the more combative part of your comment.

Meegul

3 jaar geledendiscuss

I think the excitement around this is partially people overestimating the properties of this particular material, but also partially people excited that if this is true, the method by which it works might result in the discovery of materials with even better properties.

Even this paper doesn't claim to have a particularly good superconductor as far as overall performance is concerned. It's not particularly close to the state of the art in critical field or current. But if it does turn out that their hypothesis claiming that the internal stress of the material allows it to bypass the current need for extremely high pressures / low temperatures, then perhaps there can be new materials developed that are better superconductors while still overcoming the current limitations presented by REBCOs and other leading superconductors. Also, that's not even mentioning that LK-99 has no particularly exotic materials. REBCOs rely on rare earth elements like Yttrium, but this just uses lead, copper, and phosphorus.

Meegul

3 jaar geledendiscuss

Hey Billy, very small nitpick on your site: The "Mission Sets" nav button is broken on the Viceroy page, and it looks like it's just down to the href missing the correct target (# instead of #mission-sets).

Tiny bug aside, I hope you find success in this venture. I'm sure there'll be a lot of naysayers, but I find it inspiring that someone is actually trying to do something in the sustainable air travel space with technology we have today rather than putting all of their eggs in the basket of yet to be seen technology.

Meegul

3 jaar geledendiscuss

That source only lists contracts where the price is known or can be reasonably estimated. Naturally, US government entities which have a semi-public bidding process are much easier to obtain a price estimate from. There's a large amount of foreign government contracts and private commercial contracts that are omitted from that list. Just from 2020 alone, SkySats 16-21, ANASIS-II, SXRS-1, SAOCOM 1B, GNOMES 1, Tybak-0172, SXM-7, and NROL-108.

Edit: I did unreasonably make the assumption that you were making the case the SpaceX was receiving subisidies for "nothing" and I see that you weren't now.

Meegul

3 jaar geledendiscuss

SpaceX undoubtedly does have US government agencies as some of their biggest customers, but 98% must be a gross exaggeration. The Falcon 9/Heavy have made nearly all of their launch revenues, and from just perusing the lists [1][2] of all launches, the US government can't be more than some low double digit percentage.

SpaceX does receive other funding as part of various NASA contracts, but that funding is also related to providing services to them, not just receiving money for nothing.

1: https://en.wikipedia.org/wiki/List_of_Falcon_9_and_Falcon_He...

2: https://en.wikipedia.org/wiki/List_of_Falcon_9_and_Falcon_He...