HNHacker News
TopNewBestAskShowJobs

onhn

133 karma · joined October 21, 2017

submissionscomments
onhn··on Three sins of authors in computer science and math (1997)
Unless I misread it, if a project is deemed to have an "FBA" then the project leader is an "FN", in the author's opinion. And yes, some such projects have been explicitly called out.
onhn··on Three sins of authors in computer science and math (1997)
>Really Bad Acronyms, or FBAs, are spawned by FNPLs (Nerdy Project Leaders) when naming new systems

Nothing like personal attacks to get your point across. Well done author.

onhn··on Show HN: Arxiv.org on IPFS
The standard and most effective form of curation in science is the reference list at the end of a paper.

But usually you just read everything that is relevant to your research interests from the daily arxiv posting.

onhn··on Show HN: Arxiv.org on IPFS
"You can upload your research and publish it on the open web. Members of the community will be able to vote on your research to raise its visibility."

Oh dear.

onhn··on Electromagnetism is a property of spacetime itself, study finds
Are you sure it was peer reviewed at all? It looks like a conference proceedings.
onhn··on Why is AI hard and physics simple?
I think the article misses the point of what physics is. It is not a collection of "sparse" models and principles, rather, it is a scientific discipline from which such models have emerged.

You will notice the article conflates the two things: physics and the known laws of physics (e.g. first para in section 1.2). Simplicity of the latter does not imply simplicity of the former, but the article assumes that it does in order to tackle/state the question as posed: "Why is AI hard and physics simple?".

onhn··on Why is AI hard and physics simple?
The author is talking about how a given physics model appears simple when they are presented with it, e.g. a particular quantum field theory. This is the kind of limited perspective about research that an undergraduate physicist may develop simply by solving the hand crafted problems that are presented to them.

However, the true difficulty in physics is arriving at that model in the first place. Decades of work offered up against experiment, the associated conceptual leaps in understanding required to get to e.g. a quantum field theory which succesfully predicts things are nothing short of a monumental achievement. To say that physics is simple is ludicrous.

onhn··on Science expressed in terms of what happens is getting in the way of progress
"The counterfactuals that matter to science and physics, and that have so far been neglected, are facts about what could or could not be made to happen to physical systems; about what is possible or impossible."

On the contrary, if I had to describe theoretical physics in a nutshell, I would say it is entirely about what is impossible. Pick any physical law or theorem. I cannot exceed the speed of light. I cannot globally decrease entropy. I cannot measure a force between two static electric charges in vacuum that deviates from the Coulomb force law.

onhn··on Show HN: Kalk, A calculator with math syntax, complex numbers
Note that if f(x) = x^2 then the second derivative f''(x) = 2, so it looks like you're off by a factor of 2 (as well as the accuracy issue).
onhn··on Quadratic Method: Detailed Explanation (2020)
Knowledge of complex numbers are required to solve quadratics too (when the discriminant is negative).
onhn··on Movies every physics lover should watch (2020)
If you liked Primer, the film "Timecrimes" does an excellent job at the physical consistency of time travel.
onhn··on FOVO: A new 3D rendering technique based on human vision
It is interesting that they chose to use a first person shooter as an example screenshot since gameplay would be broken by visual changes in occlusion.
onhn··on Particle Physicists Continue to Make Empty Promises
I think we need more clever people making more predictions (and especially from people quoted in the article like Gross, Witten, Rattazzi etc), and fewer blog articles like this designed to discourage them.

The last time a huge, costly, dedicated collider was built, it was in service of the Higgs prediction, and that worked out quite nicely.

onhn··on Law allows police to seize and sell cars of non-lawbreakers, keeping proceeds
IANAL but I expect not. I would imagine the rental company would then just bill or sue the driver for the loss and inconvenience (or otherwise claim it on insurance).
onhn··on Law allows police to seize and sell cars of non-lawbreakers, keeping proceeds
On a similar note, I would like to think a rental car company would suffer consequences if a drunk person waddled up to the rental desk and they were handed a set of keys.
onhn··on Fast Supernovae Detection Using Neural Networks
> astronomers use supernovae to measure distances, which is important for cosmologists to study, for instance, the expansion of the universe and dark energy.

AFAIK supernovae datasets are usually obtained as a survey, resulting in a statistical sample which can be used to compute cosmological observables. Here it seems that there is a new sample bias introduced by the neural network classifier. Can this bias be accurately quantified?

onhn··on Apple blocked Facebook's attempt to tell users about 30% App Store 'tax'
I think this would be great, yes.

The store has no reason to hide the markup if its fair, reflecting the convenience they added.

onhn··on The Rapier Physics Engine
I think only in the same way that 'soccer' is not a good name for football, as a reference to domestic violence
onhn··on Does Facebook pay Apple 30% of revenue derived from ads made within its iOS app?
In that case, hypothetically what about a separate app that only sells game currency, like vbucks?
onhn··on Challenge to scientists: does your ten-year-old code still run?
There is a fundamental reason not to publish scientific code.

If someone is trying to reproduce someone else's results, the data and methods are the only ingredients they need. If you add code into this mix, all you do is introduce new sources of bias.

(Ideally the results would be blinded too.)

onhn··on Challenge to scientists: does your ten-year-old code still run?
As a theoretical physicist your results should be reproducible based on the content of your papers, where you should detail/state the methods you use. I would make the argument that releasing code in your position has the potential to be scientifically damaging; if another researcher interested in reproducing your results reads your code, then it is possible their reproduction will not be independent. However they will likely still publish it as such.
onhn··on Ask HN: Are YouTube ads getting worse?
For me its also the quality of the ads which is a problem. Over and over I get Grammerly adverts even though I always flag them as repetitive, inappropriate or irrelevant (always signed in). They have nothing to do with my interests or viewing habits.

Twitch does an outstanding job by comparison.

onhn··on Using neural networks to upscale a famous 1896 video to 4k quality
It may appear higher resolution but I don’t enjoy looking at the extra details knowing that they are probably fictitious.
onhn··on Even 50-year-old climate models correctly predicted global warming
I was referring to, and should have written explicitly: "anthropogenic climate change" -- this was the context of the parent's comment. I don't think your examples are immediately obvious as evidence for it.
onhn··on Even 50-year-old climate models correctly predicted global warming
Not sure about ordering people like this, but to your underlying point: I would say that the evidence for Earth not being flat is directly and immediately observable in everyday life. Climate change evidence on the other hand, one has to either put in some effort in the form of research/reading, or, place trust in an authority or peers.
onhn··on Ligatures in Programming Fonts: Hell No
The article would have been a lot better if there was at least one example of where a coding ligature was a problem, rather than talking about feet and inches

For instance it mentions the pairing => but provides no examples.

After reading I’m far from convinced that carefully curated language specific ligatures are a bad idea.

onhn··on The Raspberry Pi store is much cooler than an Apple Store
Slightly disappointed its not called the Raspberry Pi shop.
onhn··on No, negative masses have not revolutionized cosmology
There is a good reason: we should not be passing judgement on the validity of scientific work based on informal discussions.
onhn··on No, negative masses have not revolutionized cosmology
The continuation of the system you mention still exists today, and is the main channel of scientific discourse. I think it is a better channel to use when challenging someone's work.

(I don't agree with your statement that it depends on qualifications -- I don't think qualification is a measure of the importance of a contribution.)

onhn··on No, negative masses have not revolutionized cosmology
It may be just text, but the points being made are technical, and the blog's author is an expert.

The author of the paper is now in a position where they feel like they have to defend themselves publicly, and I don't think this is the forum for a scientific defense (for the three reasons I listed above).

Page 1 of 2Next →