HNHacker News
TopNewBestAskShowJobs

Osmium

5,936 karma · joined October 7, 2012

Osmium@fastmail.fm
submissionscomments
Osmium··on Apple Hires Google’s A.I. Chief
> I think Apple is so many years behind Google in AI that they have little hope of catching up.

We are so early on in the AI revolution, it seems very premature to make this claim.

I would wager we can't even imagine the scope of the kind of data we'd have available in the coming decades, let alone how the latest AI tech will use it, or which company will lead the way with its application.

Osmium··on Time to talk about why so many postgrads have poor mental health
Yes, to be clear, I'm certainly grateful I find (some aspects) rewarding -- if I didn't, it would be very irrational to continue, because it has very little else going for it.

Academia is so dysfunctional right now. It's parasitic off the drive of young people who just want to make the world a little better. It's very unfortunate it's ended up this way.

Osmium··on Time to talk about why so many postgrads have poor mental health
> A lot of hard work, very little financial certainty.

Yes. It's exhausting. I'm several years past post-grad, have had a succession of one-year contracts, doing work I love and believe in and I genuinely believe has a lasting value, but the lack of any kind of security sucks. I'm rapidly approaching a wall where by I have to either go for tenure track/something more managerial/teaching or leave for something hopefully more lucrative in the private sector.

Sadly continuing with my present (rewarding, interesting) work is not an option even though after I leave, the work will still exist and will still have to be done by someone. But the academic system, such that it is, is a conveyor belt, and you gotta move on or get off.

And I got lucky too. My postgrad experience was short, went relatively well, and I'm well paid by academic standards now. I'm constantly surprised I made it out ok given the amount of stress it generated. I know many people who had much more miserable experiences in postgrad.

Osmium··on Will MySpace ever lose its monopoly? (2007)
> The cohort of young people that used AIM/MSN/Y! (depending on your region) aged up into Facebook Chat [1].

Speak for yourself, most of my social group is split between iMessage and WhatsApp.

Even so, what Facebook has that MySpace didn't is enough money to buy up its competitors to stay relevant (e.g. WhatsApp). So this might be what will happen, even if Facebook itself fades in relevance.

(Bear in mind that even if Facebook Messenger grew in popularity as AIM declined, so too did the number of people online increase, and the number of people with smartphones -- saying that one increased while the other decreased is not sufficient.)

Osmium··on Fiber Lasers are set to make laser weapons practical
> Those pesky rebels and their lasers blasters would just bounce off.

They're not meant to be lasers in Star Wars (: They're packets of ionized gas (a gas Lando and friends mine at Cloud City).

Osmium··on Creator
> These companies also frequently market with 3D models: > - apple.com

Actually, to my knowledge, Apple doesn't do this. All their product photography are photos of real objects.

Osmium··on California's other drought: a major earthquake is overdue
Any alert is better than no alert, but if you're sitting right on top of a fault it won't give you much time to act. I'd be surprised if it's even enough time to get under a desk.

Would any expert reading this like to comment?

Osmium··on Found trapped in a diamond: a type of ice not known on Earth
> The bit about compressibility tickles my mind.

One of my favourites is 'electride' bonding, where you compress a crystal so much that the electrons get squeezed into the gaps (interstices) between atoms instead, essentially making the electrons themselves act as anions.

This is really cool, and makes you wonder what other exotic high-pressure physics waits to be found.

https://www.nature.com/articles/nchem.2254

Osmium··on An intro to Pen Plotters
Big fan btw :)

Work a lot in crystallography, your work definitely inspires me to give it a go myself one day.

Osmium··on Amazon to acquire video doorbell maker Ring
Perhaps a stupid question, but where does the $1bn. valuation come from? Amazon already make hardware, including cloud cameras, would it have been so hard for them to make a doorbell in-house?
Osmium··on Apple HomePod – The Audiophile Perspective and Measurements
The reviewer seemed to be very frank about listing their biases in fairness (see the big section titled 'Bias' in the review). And they shared their original data, so it's up to you what you want to make of it.
Osmium··on Apple HomePod – The Audiophile Perspective and Measurements
That's part of the point: it has a 7-tweeter 360º array that is used to add directionality to the sound. Obviously won't compare to a true stereo pair, but it's not nothing either.

Personally speaking, I'd take great mono over sub-par stereo any day anyway.

Osmium··on Show HN: Automatic detection of non-colorblind safe colors
iOS does too, along with a number of other display accommodations. It has adjustable filters for specific forms of color blindness, along with an Ishihara-like test pattern to help tune the filter to your specific needs.
Osmium··on 'Alien Alloys' in The New York Times' UFO Story
> How can you be so sure of that? ... Do you think we could figure out a material designed by a being a million years in advance of us?

It's a fair question, but I'm pretty sure we could. We have constraints: we know the object can be stored in a warehouse, we presumably can infer it can be touched, and can be seen.

Even if it were of alien origin, wondrously advanced, made of some kind of matter that fits outside our standard model of the universe, we would at least know it interacts with light, with the electromagnetic force. We understand that force very well, so we could still characterize it. And that's if it's something deeply weird; deeply strange. (And if it were really that bizarre, it'd be the discovery of the century and obscene to keep it locked up in a warehouse somewhere.)

Far more likely, it's just made up of atoms (which is what we'd expect, given its temperature and density are within the realm of 'objects that can exist on earth in a warehouse'), and then we can use all our normal techniques just fine and it's not a problem.

> Do you think someone from 500 years ago could analyze a microchip or some superconducting ceramic?

Again, to emphasize, this is a valid question -- but we've already gone past that threshold. We can see individual atoms now, so there's not much further to go when it comes to the question of what things are made of, at least to a rough approximation.

However, the next question would be "can we make it?" and the answer to that is very different. If someone gave us some electronics from the future, we could still find out what it's made from quite easily. Understanding how it works and how to re-create it would be vastly more difficult, and possibly beyond us. But this is true of the past too; there were ways of making steel and concrete in the distant past that we've long lost the knowledge of how to make.

Osmium··on 'Alien Alloys' in The New York Times' UFO Story
I read it as saying it was impossible that there were materials being stored that we couldn't identify[0], not that the existence of the materials themselves was impossible. The point being that if these materials exist it should be quite straight forward to identify them, and if they're 'unknown' then that's simply because no one's taken the time in a lab to figure it out.

[0] To be charitable, I have no doubt that there exist substances in the universe we can't currently characterize. But if you restrict it to objects that you can physically store in a warehouse (that is, they're stable under ambient conditions), I have little doubt we can figure out what they are without much trouble.

Osmium··on 'Alien Alloys' in The New York Times' UFO Story
> based on their current understanding rather than testing the claim.

The point is that there is no claim. It is very very straight forward to identify an unknown material (figuring out how it was made, what it's for, etc., is the difficult task). If you want to claim there's an 'unknown' material, show us your XRD patterns, your EELS/XPS/NMR/EDX/PL/SIMS spectra, your AFM surfaces, your electron micrographs, atom probe tomography, any number of a hundred other characterization techniques ... then you'd actually have a claim we could have an intelligent conversation about.

At this point, there isn't even a claim that needs an expert opinion to respond to, it's all just BS.

Osmium··on Exploring Physics with Geometric Algebra, Book I [pdf] (2016)
Agreed! I think I've seen it before as a theme, but I'm not sure what it's called. Wish there was a CSS version available somewhere.

(Edit: thought it looks like it's not using small-caps variants for numerals, which is a shame)

Osmium··on The FastMail Security Mindset
Likewise. Social engineering is a big concern. I understand the risks of getting locked out of my account, but would much prefer a stricter system -- along with published guidelines on Fastmail's process for handling these cases.

Being able to persuade a customer service rep to provide access to an account (even if indirectly by changing a recovery email) should never be possible.

Osmium··on Apple is sharing your facial wireframe with apps
Haha, cool! Hi :)

Given the small size of the laser projector, I imagine natural movement from the phone being hand-held would result in significant displacement of the projected dots over a 1s interval? Have you tried integrating the 15 frames to see what it looks like?

Osmium··on Apple is sharing your facial wireframe with apps
> 2) The "TrueDepth" data is not really all that granular. It seems similar to the depth map you get from the rear-facing cameras on the "plus" sized models. Here's what the sensor data spits out: https://twitter.com/braddwyer/status/930682879977361408

As @braddwyer himself notes, you can probably get a much better mesh integrating over time. It depends how long it takes to capture a single frame, but I imagine that's not long, so getting an order of magnitude improvement is probably quite easy.

> 4) The scary part, which is vast dystopian databases of facial fingerprints is already being done with normal photographs. The depth data is not needed.

And yes ... after all, humans are quite capable of identifying people with high accuracy from 2D photographs. Depth maps are not required for there to be serious privacy issues with such databases.

Osmium··on Apple's had a shockingly bad week of software problems
I wouldn't say no benefit ... instant directory size information, instant copies are both pretty cool.
Osmium··on People Who Speed-Listen to Podcasts
It's also the case that often there aren't spaces between words. One of the surprising things when you first start doing audio analysis is that the pauses between words that you perceive aren't actually there in reality -- which makes them a lot more difficult to 'remove' algorithmically.
Osmium··on Swift for Data Science / ML / Big Data Analytics
Submitted due to interesting discussion from Chris Lattner on adding Python interoperability into Swift (something I would love to see, and seems like it could work quite elegantly).
Osmium··on Poly – Browse, Discover and Download 3D Objects
Thanks, this looks really useful too! I had no idea it was there.
Osmium··on Poly – Browse, Discover and Download 3D Objects
Draco looks exactly what I need actually -- thank you!
Osmium··on Poly – Browse, Discover and Download 3D Objects
Slight tangent, but does anyone here have recommendations for a good serialization format for 3D models for the web? Think for loading into Three.js. Ideally something that can be converted to/from Collada. It seems like a lot of the standard file formats are quite heavy.

Edit: glTF? Not sure how good tooling is for this yet, but looks promising.

Osmium··on TileDB: Storing massive dense and sparse multi-dimensional array data
Excellent! Good to hear :)

Also saw in your documentation that you're concentrating on lossless compression right now, which makes complete sense. However, as a scientist, I just want to put a vote in for lossy compression too: it's not uncommon to work with large datasets given in float64 (because float64 is used for any intermediate processing steps), but that actual final precision we need to store is much less than that, but we're stuck with these huge binary files.

Osmium··on TileDB: Storing massive dense and sparse multi-dimensional array data
Looks exciting. What's the easiest way to get started with this via Python/NumPy? Looks like this is a design goal, but not currently supported.
Osmium··on Why scientists are redefining the kilogram
> A "mole" is a unitless quantity. Literally it's just a number.

True, but it's defined relative to the kg. It's the quantity of Carbon-12 atoms in 12g of Carbon-12.

As for why it isn't an 'simpler' number, it's because if you want a standardized definition of something you have to have a reliable reference. Which is precisely why the kg itself is being redefined.

Side-note: the act of creating this ultra-pure kg of Si-28 has actually created a lot of useful science in its own right, which is nice.

Osmium··on Astronaut Paul Weitz has died
Counter-anecdote, I just had the pleasure of meeting a 90-year-old man who was still very mobile, very compus mentis (we had a nice chat that I could have had with someone of any age), and who was surrounded by a loving, social family. Who would complain about that?
← PreviousPage 4 of 34Next →