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physix

167 karma · joined December 27, 2024

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physix··on Monte-Carlo Simulations
That brings back memories!

I wrote Monte-Carlo simulations to calculate the thermodynamics of oxygen ordering in a high temperature superconductor way back in 1993.

Calculating thermodynamic fluctuations on a 256x256 lattice took all night. And that, even though it ran on an HP 9000/750 with a 66 MHz PA-7000 (PA-RISC 1.1) 32-bit CPU.

While waiting, I used to look at weather satellite images downloaded from CERN using NCSA Mosaic. It was impressive. All the information available at your fingertips by using arrow keys and pressing return on underlined text to navigate to the next page! Emmm, link.

physix··on How accurately calibrated is Jev?
Isn't this just testing its training on statistical mechanics? It's sort of a specialized field of knowledge and perhaps not well trained on that.

It might be better at classifying the author from a piece of text, given N candidates. That's a dirac delta function, unless it's been plagiarized.

physix··on Claude Fable 5.1 and Claude Mythos 5.1
I've been cleaning up AI generated system/software design and architecture docs for an agentically engineered application, to translate that dense AI-speak into a clear human-readable form, cross checking it all against the actual codebase.

When I read the translated version, I felt a flush of relief, because I finally could confirm that it built the right thing and properly implemented the requirements.

I then asked in a fresh session which version was better for it as a reference for future work. It unequivocally voted for the human readable form, and gave it's reasoning with specific examples why.

So, I have a hunch that this "packing of lots of signals into fewer words" isn't really better. The incomprehensible prose just makes us think it knows what it's doing, like some mysterious magic that is only smoke and mirrors.

physix··on Humanising LLM Outputs Is Dumb
This just might save me. Claude has been driving me nuts with incomprehensible summaries after a long task, where it's actually really important to understand what was done (and what wasn't).

But I'd like that skill to only be used at the final step, when it finishes something.

physix··on Discovery Loop
Predictions are only one part of research. It's what theorists feed experimentalists with. Confirmation of predictions is by and large a very physical endeavour. Labs are not going away.

I do feel that it's exciting to see what AI will be able to do to help research and discover new things.

My gripe is with their messaging. Because a lot of people will misinterpret that, including politicians, possibly to the detriment of good science.

physix··on Discovery Loop
In many domains, scientific research is physical. Are they going to deprecate labs and sort of scale that out into a pure compute problem?

They are occupying a term in their headline messaging that is much broader than they can actually cover.

A common pattern these days. Overclaim, attract attention, iterate.

physix··on Eight Myths on Software Engineering and GenAI
>a “good” workday, engineers spent 18 percent of their time “coding” (not including bug fixing, testing, etc.)

I must be a crap developer, because I probably spend twice as much time bugfixing and testing than "coding". (Both of which actually involve coding stuff, so I really don't like that distinction they make)

This is stuff AI can be really good at, so brushing that part under the table distorts the picture.

Having said that, I do agree with most of the myths they present.

physix··on Smaller, faster, safer: running Kimi and GLM at scale
Better would have been to offer a button to flag something that does NOT seem like AI slop on LinkedIn.
physix··on Claude Opus 5
Has anyone noticed a change in "attitude" when coding with Opus 5 vs 4.8?

claude has this maddening principle of wanting to minimize the "blast radius", do the least amount of coding changes to get something done, happy to pile up technical debt by "deferring" problems encountered as side notes somewhere. No amount of CLAUDE.md tweaking, and setting .claude/rules seems to get rid of this attitude.

To me it appears like something deeply ingrained in the model itself. Kind of makes sense, since the bulk of the training data is pre-AI, so that it retains an approach of the past, where these facets were driven by completely different cost and time factors.

The past months, I've been hoping that the next model that comes out properly reflects the new reality of agentic development, so that it takes on a more natural stance compatible with how things work today, and we don't have to constantly fight against its fear of change, its drive to minimize coding efforts, refusing to recognize a design flaw and trigger discussions rather than baking in workarounds.

physix··on Financing the AI boom: from cash flows to debt [pdf]
I'm not sure the current administration is fully driven by macroeconomic arguments.
physix··on The zero-cost fallacy: open-source software in the agentic era
I think the article is really good, until it starts to offer guidance and making suggestions for the future.

I can't pin it down precisely, but my feeling is that it doesn't fully recognize the fundamental shift taking place. In a sense it's not radical enough, trying more to keep a system afloat whose foundation is being dismantled.

The forces that gave rise to open source will find a new way, because they are based on the nature of the human spirit. We just don't know what it will look like yet.

physix··on How to stop Claude from saying load-bearing
So this isn't the way techies in Silicon Valley talk??

And here I was using my claude dialogues as a way to refine my speak and better connect with the heartland of innovation.

:-P

physix··on Cursor 0day: When Full Disclosure Becomes the Only Protection Left
Wouldn't this be something a virus scanner would detect and quarantine?

Not an active Windows user, but I can't imagine any sane person working on Windows OS without malware protection.

physix··on Ask HN: What Are You Working On? (July 2026)
https://github.com/Cyoda/cyoda-go

Business objects as state machines.

The idea is to reduce the number of moving parts and simplify processing architecture when building apps that need to be transactionally rigorous and scalable.

It stems from the patterns we used to successfully apply in banks, which worked really well. I believe it's an effective way to get shit done in a broad class of systems. You just need to first get your head around it.

https://medium.com/@paul_42036/whats-an-entity-database-11f8...

physix··on LLMs Are Complicated Now
For someone like me who's never done any hands-on work in ML, the blog is really hard to understand. Whoosh, over my head.

But, I think the underlying problem is that we don't understand how this sh*t works. So, it's just an empirical, iterative mess.

Like physics in the the years shortly before relativity and quantum mechanics.

physix··on Developers don't understand CORS (2019)
> Developer's don't understand CORS

Count me in!

physix··on Show HN: StartupWiki – A Free Alternative to Crunchbase
How about adding some stats to your landing page?
physix··on Surprising Economics of Load-Balanced Systems
I thought the same thing. But, should we be surprised about what people believe in these days?

I think that the issue is in part due to the variables. Plotting the mean request time is less intuitive than plotting throughput.

If you plot throughput vs number of servers, it'll be a straight line. And asking people that, I think most would agree on a straight line. But who knows!

physix··on Ask HN: Will programmers write more efficient code during the memory shortage?
If the producers see a long term demand for memory they will meet the challenge and produce enough to bring prices down.

Economics will invariably alleviate the memory crunch. It just takes long and requires a huge upfront CapEx.

They have been burned in the past and are hesitant to over invest, worried that the bubble might burst.

I expect high prices to stick around for a while, but I would be surprised if this was permanent.

Which means to me, that price pressure probably won't be the driving force for writing more memory efficient software.

For those who want, I expect AI to make it easier to do that, assuming it's done right, i.e. not vibe coding it.

If you have a subscription to The Economist, I recommend listening to this Money Talks podcast. They talk about the shortage and the economics behind it.

Can anything stop South Korea’s bull run?

https://www.economist.com/podcasts/2026/05/21/can-anything-s...

physix··on Is AI ruining our skills? Early results are in – and they're not good
The bike/motorbike/car analogy is good. In each you can find enjoyment that suits your character.

I have been drawn to coding from the first day I took a course at college learning Pascal and assembly on an IBM PC. Hell I even wrote an IEEE/488 driver for an Osborne 1.

As an experimental physicist, coding was always central to my work. I always felt guilty because I had more pleasure coding than tackling the physics itself.

This is a new age we are entering. AI changes how we do things, but I believe that the human passion to be creative and do intellectual work will always be part of it. It's in our nature.

So I'm not worried that we'll all dry up and turn into zombies.

physix··on Is AI ruining our skills? Early results are in – and they're not good
For me personally, holding a dialogue with several agentic dev streams in parallel keeps me very much on my toes mentally. It's quite exhausting, and certainly not letting my brain atrophy.

I'm probably losing some coding skills, but replacing them with different ones, and honing some others.

I used to manage dev teams of 20+ people inside high pressure, high stakes projects.

I've been coding all my adult life, on big things and small.

To me, agentic engineering is a deja vue of managing teams, except in real time.

physix··on Cell-based architecture for resilient payment systems
That would be the good case.

But what if the cell doesn't know that, and it's holding, for example, a stale account number?

physix··on Cell-based architecture for resilient payment systems
Nobody uses Amex for payments, so the system isn't ever under high load.

Just kidding!

I find the idea quite good, and have to assume that the amount of payment fails they experience due to partitions/outages isn't very high and that the post-payment reconciliation and reclamation process gives them the liberty to rank availability a bit higher than correctness.

One thing that looked a bit shaky was the interplay between the global transaction router's state of knowing which cells can handle a particular payment and the asynchronous distribution of the "failover data", which I presume it needs to know to route correctly. To me that seems to create a window where it might route to the wrong cell due to an outdated routing state.

It also doesn't go into the HA setup of the global transaction router itself.

But still, I kind of like the design.

physix··on Apple's weird anti-nausea dots cured my car sickness
Unfortunately, I get car sick just sitting in the back. No need to look at a phone. So I guess I'll have to wait until Apple Glasses to come out.
physix··on Ask HN: Has anyone replaced Claude/GPT with a local model for daily coding?
The dilemma I am facing is cost.

Consumer-grade subscriptions of the frontier models give you superb capabilities per dollar, them being heavily subsidized. But if you're working in an enterprise setting, that won't work. You need to upgrade, and that gets significantly more expensive.

Furthermore, basing the SDLC on leveraging the bargain subscriptions risks falling apart in the future, both from a cost perspective as well as the question of availability (e.g. Mythos).

So from a strategic perspective, going local on the LLM and still achieving great results with the right approach is very relevant.

physix··on Show HN: Tips to stay safe from NPM supply chain attacks
For what it's worth, I prompted GPT-5 Pro to produce a npm supply chain best practices guide, to see what it comes up with. I've not read it yet.

https://gist.github.com/pschleger/c1c36fbde003bea5eee7ce4291...

And a prompt to review a site I built for GitHub Pages, which I'll try this week.

https://gist.github.com/pschleger/8d5fcea6b96d8504ac58bb2f8d...

physix··on AI not affecting job market much so far, New York Fed says
That's right. As a tech company, we can now do more with the people we have.
physix··on AI not affecting job market much so far, New York Fed says
Well, this one isn't that rosy

> The New York Fed blog noted that the modest impact on jobs so far may not hold in the future. "Looking ahead, firms anticipate more significant layoffs and scaled-back hiring as they continue to integrate AI into their operations," New York Fed researchers wrote.

physix··on Prime Number Grid
https://news.ycombinator.com/item?id=44888548
physix··on The lottery ticket hypothesis: why neural networks work
As a layman, it helps me to understand the importance of language as a vehicle of intelligence by realizing that without language, your thoughts are just emotions.

And therefore I always thought that the more you master a language the better you are able to reason.

And considering how much we let LLMs formulate text for us, how dumb will we get?

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