skysight-inc/HackerNews huggingface dataset:
Preprint by Griffin from Livermore Labs gives a theoretical explanation of LK-99's superconductivity and also explains why labs are having a hard time synthesizing it. There are two Pb sites in the crystal structure that Cu can substitute at, the lower energy one does nothing but it's the higher energy site that creates superconductivity.

https://arxiv.org/pdf/2307.16892.pdf

"Finally, the calculations presented here suggest that
Cu substitution on the appropriate (Pb(1)) site displays
many key characteristics for high-TC superconductivity,
namely a particularly flat isolated d-manifold, and the
potential presence of fluctuating magnetism, charge and
phonons. However, substitution on the other Pb(2) does
not appear to have such sought-after properties, despite
being the lower-energy substitution site. This result hints
to the synthesis challenge in obtaining Cu substituted on
the appropriate site for obtaining a bulk superconducting
sample."
Monumental progress is very rarely done in one giant step, but with many incremental improvements.
NASA STDs, handbooks, guidebooks, NPDs and NPRs are all open-source. They don’t mention FMEDA, and they don’t generally have a detectability column in their FMEA. IMO they are a little outdated
Better than the WWII era German aircraft insignia youtube uses for the "unfullscreen" button.
I'd be curious to know if someone is successfully using this in a team. How is it when two people are working in the same branch?
I thought most catastrophic thinking would be related to personal minutiae. That's why its "catastrophic thinking". Changes to the global climate and the systemic and societal upheaval in response to those changes are significant.
Yes, because the article is, as I said, rage bait. It completely misrepresents how kritiks operate, and cherry-picks judge paradigms. There is nothing wrong with liking kirtiks anymore than liking any other type of argumentation, but the author doesn't like them, so they're trying to make it seem like they're bad, and thus so is liking them.

There are FAR more paradigms out there where judges will say they don't want to hear Kritiks, especially K-Affs.

> they don’t even bother advocating for the original resolution!

There is no requirement that the debaters advocate for the resolution in most forms of debate; the author is trying to make it sound unusual, but that's extremely normal, and always has been.
I'm of the same opinion as you, here. I generally have 10+ "extra" files in my project directory (output files, notes, one-off scripts for certain things, etc). When I add files to a commit, I do it by filename, never "everything that's new/changed". I don't have a use case for "everything I've created/changed goes into the commit, always".

> switch to another branch, the files will still be in your working copy but not listed in your .gitignore file

This is a failing of git, imo. There should be a .local.gitignore to somesuch, that is "added to" .gitignore. It's VERY common for me to have files that I want ignore, but are specific to me; they don't belong in the project's .gitignore. I know there are ways to do this, but all of them are clunky. There should be a simple, out of the box way to do it.
If it's not the galvanic effect, it would be more direct corrosion as the block will be "soaked in a standard electrolyte material, such as potassium chloride".

And - given that the concrete will be poured "normally" - the reproducibility of these "power foundations" is likely to be low (and as you say there is no easy wayback).

Besides, concrete is not just water and cement, the various sized aggregates (sand, gravel, finer aggregates) are what make it actually "concrete", the "grain" of concrete used in construction is very different from pure cement+water (and 3% carbon) mix, the samples they made (1 mm thick) won't likely scale up.
Fascinating.

How does it handle very large repos and binary files? I want petabyte scale history and terabyte scale sparse clones.

Alternatively, why use this over Git? I read the differences but feel like I’m missing a higher level difference. What problems does this solve that Git/Hg don’t solve already? What was the inspiration for starting the project?
Friendly suggestion to peruse Jetbrain's third-party data-sharing agreement while considering what information of a user, even in theory, it might forbid them to share with anyone they wish for any reason they please.

https://www.jetbrains.com/legal/docs/privacy/third-parties/

After you do that here are some IDEs that (so far as I know) don't have data-sharing agreements with third parties.

https://downloads.codelite.org/

https://vscodium.com/
You could have just said you don't believe in climate change buddy.
Nobody's clutching pearls or tone policing.

Your arguments aren't unique by a long shot; you're simply witnessing two seperate people who have been discussing technical matters since pre-WWW Usenet days observing there are hackers who have been making those arguments for 40+ years.

I can't speak for Don but for my part they got dull 35+ years back.

I'm sure you can find a rebuttal or reinforcement, whichever you need, elsewhere.
Her*

But the paper is exciting, particularly with people now independently recreating the diamagnetic effect.
"you need to learn how to do arithmetics. You won't always have a calculator in your packet!"

I guess next generation will always have their personal AI with them.
Well, it is open source, so the author or someone else could always pick it up again as a personal project if that happened.
Necessarily with a large EMP, as the energy is stored in the magnetic field.

Fortunately the energy density[0] is comparable with rubber bands[1] and supercapacitors[1], so while the EMP is large, it's not terrifyingly large.

[0] at least according to wikipedia, 4-40 kJ/kg: https://en.wikipedia.org/wiki/Superconducting_magnetic_energ...

[1] 1.6-6.6 kJ/kg and 10-30 kJ/kg respectively: https://en.wikipedia.org/wiki/Energy_density
If you like to experiment with a language that is similar to Java is suggest you try Vala. It looks a bit like Java but has some differences and uses ref counting instead of garbage collection. It compiles to C++ (or C?) and then to native; this makes the build extremely steep and difficult but once you get that going it is really nice.
You-nailed-it.
We have that too :)

https://docs.socket.dev/docs/socket-cli
Ok, that will cost about $100m just for the GPUs, the power, and the data centre bill. How are you proposing to raise that?
One possible application for a cheap strongly diamagnetic material would be in passive diamagnetic bearings for replacing the active magnetic bearings that are used in flywheels with very high rotational speeds.

This would cause a reduction in cost and size and an increase in energy efficiency, which could make the flywheels competitive for more energy storage applications than the niches where they are used now (i.e. for very high power density, but low energy density and short storage times).
I suggest you add a trailing - (hyphen) to detect scripts unable to treat filenames separately from options.
Maybe there'll finally be a strong economic driver for ripping out all the old lead plumbing around the world, heh. Watch how quick Flint, MI gets their stuff updated if someone can make a buck on the old pipes!
Who and What Is Behind the Malware Proxy Service SocksEscort?
tell git to treat it as if it's unchanged

i have these 2 aliases
assume = update-index --skip-worktree
unassume = update-index --no-skip-worktree

"assume" as in "assume it's unchanged / not wanted"

which lets me say "git assume path/to/file"
and then "unassume" it when/if i want to commit it.
Thank you. I will carefully consider your advice.
I think your question is getting into the field of martial arts lineage. People might have their own narratives/ mythologies around this, but here's the most neutral way I can explain it: As techniques and styles evolve over the years, people come up with new names to describe those styles. Name similarities will often imply closer ties in lineage.

As a Brazilian Jiu Jitsu practitioner, I cringe when I see it spelled any other way, but also I have to recognize that I only feel that way because I have more exposure to that specific martial art/spelling.
They've been replaced with fashion mistakes
Levitation: Pyrolytic Graphite and Neodymium Magnets (2011) [video]
> Whenever you evaluate an API, or create a new one, you must always, always, ALWAYS start by writing some code as if you were a user trying to do the thing that the API is supposed to do.

I’ve been telling this to the developers I have worked with for the last 15 years. Similar to Amazon’s “working backwards” concept, the only way you can reliably get a good API is to engineer it from the customer’s point of view. That means write the code that you want your customers to write (or that you would want to write, if you were the customer) and then engineer backwards from that.

One of the biggest problems with API design is that often the developers of the API have a vastly different mental model of the functionality that they’re encapsulating in an API, than their customers. Often, customers can’t even develop that mental model because the encapsulated code is a black box.

Another common API design problem is that you’ll just write a simple CRUD API around your object model. This often causes customers to have a bad experience if they use objects in conjunction with each other, and have to do a lot of housekeeping to associate objects with each other and keep track of multiple objects to perform simple tasks. My example here is AWS Route 53; the API is a real pain to use if you just want to do something simple.
At this point we know very little and we have to leave it to the AIs to determine if physics has any limits.
Then spend a grand or two on a decent fridge from a reputable manufacturer that will last and has the features/gadgets you probably do want (auto defrost, quick freeze, chilled water etc).
The point of weekends is to not have a schedule
Her*, thank you.
There is a lot of moat for intelligent people who leverage emerging properties of huge LLMs. I am not going to give you a hint but I already use those LLMs in unexpected ways that weren't possible before.
Did you understand what he said when he explained what kind of magnet he used? Different versions produced by targum claim either "aluminum shed magnet" https://targum.video/v/2023/8/1/e2ad3b8e86961ccfdcf411d2d4d1... or "cast iron shed magnet" https://targum.video/v/2023/8/1/2534a4408ccce9c13a811e94f16d...
> Did you know that the English way to pronounce "jujutsu" isn't how the Japanese pronounce it?

Really?

The wiki audio sample[1] seems fairly close to how people in the US pronounce the word, just with a more emphasized first syllable.

---

1. https://upload.wikimedia.org/wikipedia/commons/f/f1/Ja-Jujut...
BMJ: Evaluating trendsin private equity ownership and impacts on health outcomes [pdf]
How far must a ball travel to be a home run? Depends on the MLB stadium
>More than 1,000 batted balls this year resulted in outs that would have been a home run in a different ballpark, according to Baseball Savant. Those coulda-beens would have pushed this year’s home run total from 3,535 to 4,546, as of July 25.
I agree with you, but I will say, worse than no abstraction is a poor one. Give me CRUD any day over something that doesn't expose things I need or makes me jump through too many hoops to get something simple done. At least then I can build what I need.
My iPhone can take stunning videos. This is not 2010 anymore
You guys are familiar with how we arrived at this particular regime of mispricing risk, right? It’s preferable to the alternative. This is why banks are tightly (but imperfectly) regulated.

Similar observations apply to that more fundamental instrument of mispriced risk - limited liability business entities. The worst possible arrangement, except for all the others.

Personally I prefer to tilt at the windmill of the asymmetrical payoff diagram of US CEO compensation structures. While it’s still the case that nobody much cares about my opinions on the subject, this one at least has less of an aspect of battle-tested socioeconomic optimality.
We discovered first "crystal diodes" in 1870s. There was a whole idustry doing "magic needle+crystal diodes" without understanding why they work. They just knew you had to touch a special spot on the crystal with a needle. Some spots worked better than others. It was art not science.

We had the first theory on how they operate in 1920s. Eventually we got transistors from that theory in 1950s.
the West can no longer make war
Archive without paywall: https://archive.is/0LyCG
Shock Treatment in the Emergency Room
Python, JavaScript
Making an API knowingly and intentionally far more complicated than necessary is not just bad, it is evil. Doing it to enrich yourself personally is akin to embezzlement.
Have you considered training a shallow MLP autoencoder, perhaps with tied weights between the encoder and the decoder to reduce the dimensionality of the embeddings? Another (IMO, better) approach I can think of off the top of my head, would be to use a semi-supervised contrastive learning approach, with labelled similar and dissimilar video pairs, like in this notebook[1] from OpenAI.

[1]: https://github.com/openai/openai-cookbook/blob/main/examples...
> It almost seems like there's a real job here for the right type of person. "Real World Engineer"?

Yeah, that'd be nice. For example, several of years ago all of the bus stops around have been replaced by a unified design: three glass walls and a barrel roof made from orange plastic on top. But there is no bench to sit on inside, the roof is made from half-transparent plastic so it provides almost no shade in summer (and walls are fully transparent glass), and also the roof is lifted up just high enough from the walls that the rain would pour inside if there is any wind at all. But they look prettier than older bus stops which is something, I guess.

I am pretty willing to bet that whatever people who designed and approved that design don't actually use public transport.
Depends on the details, as always.

I don't know the superconductivity mechanism here (does anyone?), but IIRC Cooper pairs in BCS theory can be separated by much larger gaps than the transistors in a modern CPU — hundreds, rather than single-digits, of nanometers.

Might make fully-3D processors much more viable though, from lack of heat dissipation; and if it does, that in turn might be able to make up for a coarser resolution.
Generally if I get an LC type question in an interview it immediately plummets my interest in that company, so it doesn't really matter if I get the answer right or not.
He had abandoned them for about a week but then talked to the CEO and that got things back on track IIRC
> I now have some Go websites running for a long time with daily Systemd restarts.

I went a step further and all of my servers do staggered restarts at the start of every month (previously daily/weekly, but once I worked most stuff out, a month is enough now).

No more update related issues catching me off guard when I suddenly NEED to do a restart in short order, no issues regarding manual processes or a service that doesn't start automatically after a restart/crash, or other things that you might not catch otherwise, load balancing etc. Even stuff like restarting the Swarm cluster leader/followers close to one another, yet expecting them to eventually communicate with one another properly and schedule all of the containers, pull them and launch them as needed, join them to the networks and actually communicate properly to them.

Knowing that restarts are inevitable (sometimes after a crash), might as well make sure that they work properly.

And when you discover a new failure mode and something indeed doesn't work, it's nice to test your monitoring and alerting, as well as learn how to deal with that particular failure.
That's neat, but it misses the point. LK-99 is not even available for engineering, yet. You might be able to use one of the existing designs. Maybe you need to come up with a new design. But you cannot do that just yet.
No, unfortunately it doesn't learn online. It forgets everything after each interaction. They can collect the data and retrain later, but the hard part is doing all the fine-tuning steps all over again and ensuring the new model has no regressions. GPT3.5 and 4 are years out of date, an unfortunate situation when generating code or asking about recent events.

And now they removed the search plugin, probably they got sued for copyright leaks from the search engine results into the generated text. Using copyrighted data in the prompt is not necessarily legal. So we have to deal with out-of-date AI that updates once every couple of years.
Unlimited paid time off? Why show up at all?
This does not exist in the world I live in (utilities)
I expect most games available for sale don't ever see $5k, but I'm not sure if that's an argument for or against participating in such a "challenge".
How anyone can see anything in the video is beyond me. Just dozens of comments literally flying across the video.
And tbis is why we have logging system. A decent automated query of your syslog output should be able to show you any flapping services. A setup like this gives you not only self-healing (as described in the post) but also visibility into erroneous systemd units.

I always thought a good monitoring system had three components. Polling, streaming data and log analysis. A lot of times folks don't bother with the logging and miss issues like what is described in the post.
i always have a large pile of temp files and such that should never be committed but it's never been a problem because i never use `git add .` i use `git add -u` which is "only add things that are already being tracked"

there's a newer flag for the same thing but my brain is hardcoded to the old "-u" option from "back in the day". It feels like a "simple, out of the box way to do it" to me.
> My guess would be that those letters are an even more shortened form of linear amp(lifier).

No, they were colloquially called (void) lamps in at least French and Slavic languages, because they looked like incandescent bulbs, that were called lamps (lampe/лампа) as well.
Tabletop creators struggle to plot their future amidst Twitter’s ashes
>So in theory you could have a ridiculous computer that runs 1000GW of power through it without heating up.

That doesn't make sense. Power has to be consumed by something. All energy ends up as heat, so if the computer isn't heating up then the power consumption is 0W, not 1000GW.

>Or a flying car.

A flying car with superconducting motors would still have to expend the energy to stay aloft by pushing air downwards. Even without thermal losses to electrical resistance, you'd still have losses to friction from the moving components.
Thanks for paying it back, and showing how it can be done.

The system works.
congrats. UX looks great.. and i personally know that part was not easy to refine.

curious, what solution are you using for the realtime multiplayer?

good luck!
Whatever suits your fancy.

> Why not spend the rest of his life checking different properties of the one sample?

The material in question is called LK-99 because it was first produced in 1999. Why not, indeed :) ?
Wouldn't it have the opposite effect, of massive centralization?

If you can make a perfectly superconducting electric grid, then it's better to build power plants in a single optimal location (e.g. nuclear power plants in an isolated area with no environmental risks) and deliver to the whole world via superconducting wires.
Congratulations on owning an iPhone! (I do too, they’re great.) But I want to emphasize that the quality of the phone camera was not the point of that story.
Framework 16 – Performance vs. Price [video]
But how do you get them out? Don't electrons prefer the path of least resistance, so that is staying in the superconductor? Or they won't stand still?
> “Yeah you won’t figure those APIs out from the documentation. It was on purpose. You have to go buy the book.”

I KNEW it!!! In a prior job, I had the unpleasant task of shepherding a SharePoint installation, and was incredibly frustrated at the documentation AND the available literature. I jokingly commented it must be to keep all those SharePoint consultants busy.

Now I think that might actually have been the case. Those poor souls...
DS & Algo classes never required us to prove anything. There was an algorithm analysis class which did, but DS & Algos is basically about memorizing the implementations and big O notation for future job interviews
I'm curious about your use of affiliates and how they worked out - definitely would like to get some guidance there. But it's not for a SaaS app, so not sure how much guidance you can provide.
GNNs and graph transformers are the current state of the art methods for this kind of crystal property prediction task. One drawback is that they don’t seem to capture long range structure all that well, and the current generative models (which are really cool) based on GNNs don’t seem to take advantage of symmetry that well
SEC sues Richard Heart for allegedly misusing funds to purchase luxury goods
I'm running a constrained convex optimization project at work, where we need as close to real time (<10s is great, <1min is acceptable) responses for a web interface.

Basically I'm using a SciPy exclusively for the optimization routine:

* minimize(method="SLSQP") [0]

* A list comprehention which calls ~10-500 pre-fitted PchipInterpolator [1] functions and stores the values as a np.array().

The Pchip functions (and it's first derivatives) are used in the main opt function as well as in several constraints.

Most jobs took about 10 seconds but the long tail might take up to 10 min some times. I tried the pypy 3.8 (7.3.9), and saw similar compute times on the shorter jobs, but roughly ~2x slower compute times on the heavier jobs. This obviously was not what I expected, but I had very limited experience with pypy and didn't know how to debug further.

Eventually python 3.10 came around and gave 1.25x speed increase, and then 3.11 which gave another 1.6-1.7x increase which gave a decent ~2x cumulative speedup, but the occasional heavy jobs still stay in the 5 min range and would have been nicer in the 10-30s obviously.

Still I would like to say that trying pypy out was a quite smooth experience, staying within scipy land, took me half a day to switch and benchmark. But if anyone else has experience with pypy and scipy, knowing some obvious pitfalls, it would be much appreciated to hear.

[0] https://docs.scipy.org/doc/scipy/reference/optimize.minimize...

[1] https://docs.scipy.org/doc/scipy/reference/generated/scipy.i...
Also, the ozone holes, acid rain, and things like Y2K. “This thing would have been very bad, but we (expensively, with great effort) fixed it, so it was okay” somehow becomes, in the public imagination, “this was not a real thing”.
Smartmontools 7.4 released – tool to monitor disk (NVMe, SATA, SCSI) health
I do think they are, but it's also (obviously) the case that if an eruption blotted out the sun and disrupted wind currents, having the ability to keep generating power would not help much because the plants and animals we eat would all die.

And what's with the weird tone? It's a super banal point that our food requires sun. I highly doubt you're "shocked" by it.
I really wanted this article to live up to the headline, but was sadly disappointed.

It isn't even factually accurate:

> When it comes to generative art tools specifically, the tool simply searches for images that match the keywords or descriptions in your prompt, then mashes the elements together.

It IS entirely possible to use these tools in a thoughtful and ethical manner, in a way that increases the accessibility of art-making without directly assaulting the artists upon whose work they are built, but we don't really get to that discussion in this article.
How a Vast Demographic Shift Will Reshape the World