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bjeds commented on Free-space optical links for space communication networks   arxiv.org/abs/2012.13166... · Posted by u/privong
xoa · 5 years ago
>you can clearly see that the satellites are visible from the ground (the photo from Germany)

No, you've misunderstood (in numerous ways, but this is a specific one you've cited). That photo you linked is of a satellite "train", which is a temporary state of satellites after deployment as they take themselves the rest of the way to final deployment orbits. At that point they'll be both spread out and the albedo will be vastly lowered because SpaceX has already made design alterations to the sats so that in their operational alignment towards Earth they are far less reflective. They're not going to interfere with the sky from the naked eye, nor even for general photography, even from low light pollution rural areas vs typical urban ones.

It doesn't help that you're almost a parody of "entitled, dismissive urbanite". Even in the developed world, tens to hundreds of millions of people have crappy DSL at best. Outside of the developed world that rises to billions. Marine and aircraft stand to make enormous gains as well. The demand for Starlink is clear and well founded, and you do your argument zero favors by trying to hand wave it away (unless you just mean to rant to no constructive end).

bjeds · 5 years ago
Hacker News continue to disappoint lately. I naively thought that by using my real name people here would actually treat me like a real human, not some anonymous punch bag. I don't know who you are "xoa", but that was a very rude comment.

I have provided a Criticism section of a Wikipedia article that points out light pollution criticism from many authoritative sources, including photographic evidence. You dismiss this photographic evidence, but why should I listen to you when I can listen to the IAU, for example? Or Nature? Or the astronomical community?

Quote International Astronomical Union: "The scientific concerns are twofold. Firstly, the surfaces of these satellites are often made of highly reflective metal, and reflections from the Sun in the hours after sunset and before sunrise make them appear as slow-moving dots in the night sky."

Here's an entire article in Nature Astronomy about the issue https://www.nature.com/articles/s41550-020-01238-3

Here's a quote from a Senior Advisor to the European Space Agency https://twitter.com/markmccaughrean/status/11323943469454213...

Here's an entire discussion at the American Astronomical Society about the issue https://aas.org/posts/advocacy/2020/12/impacts-large-satelli...

Here's an article about how the problem will get workse https://www.scientificamerican.com/article/spacexs-dark-sate...

But sure, you call me an "entitled and dismissive urbanite".

bjeds commented on Free-space optical links for space communication networks   arxiv.org/abs/2012.13166... · Posted by u/privong
toomuchtodo · 5 years ago
Would you feel the same way if observatories were lifted beyond Earth orbit where their view was never obstructed? There is so. much. space out there, and it seems silly to argue over the artificial scarcity of clear sky when we can solve this with technology. We’re even putting a global comms network in place that could support high speed science data store and forward from space observatories to science consumers on ground.

What if we could churn out orbital science platforms as fast as SpaceX churns out Starship SNs and StarLink satellites?

bjeds · 5 years ago
If you look at the article I linked, you can clearly see that the satellites are visible from the ground (the photo from Germany). If you search for "starlink" on Flickr you can see more examples.

This is light pollution.

bjeds commented on Free-space optical links for space communication networks   arxiv.org/abs/2012.13166... · Posted by u/privong
arijun · 5 years ago
I can't wait until Starlink starts implementing their planned optical links and unleashes intercontinental lower-than-fiber latency.
bjeds · 5 years ago
They may "unleash intercontinental lower-than-fiber latency", but they also unleash light pollution.

Where do you live? In most of Europe and SE Asia you can get gigabit broadband.

I think SpaceX is a cool company and I could see myself work there, but StarLink is, IMHO, a shitty project that ruins the night sky and space for everyone. https://en.wikipedia.org/wiki/Starlink#Criticism

bjornedstrom commented on The Detente Escapement Explained   timeandwatches.com/p/the-... · Posted by u/herodotus
herodotus · 5 years ago
One of the best animations I have seen. Although I am still left with one question: how come the impulse pallet misses the escapement tooth in one direction, but engages it in the other? This has puzzled me ever since I saw a cutout version at a watch exhibition at the Imperial Science Museum in London.
bjornedstrom · 5 years ago
If you look at the second animation closely you can see that there's a piece of spring steel one one side. In the animation it's only a 1-or-so pixel line. But that piece of spring steel open in one direction, but in the other direction it's stiff enough it will push the arm instead of bending.
bjeds commented on They want us to be compliant, not secure   go350.com/posts/they-want... · Posted by u/_uvd9
paultopia · 5 years ago
^^^^^^. This x1000.

Yes, it's bad when bureaucracy means that individual bad decisions are made. But casually saying "oh, well, this is idiocy, the government doesn't care about security" ignores the fact that organizing the regulation of human behavior is immensely costly, and the government needs to optimize on those costs.

A good dev analogy is using a library function vs rolling your own. The government's library is the list of things that its own engineers approved. The equivalent of rolling their own is for some individual auditor to make an independent decision to deviate from the list. Now, it might be that you can squeeze out an extra tiny bit of performance[/the government can squeeze out some extra security] by rolling your own sort function or whatever, but most wise devs will balance that off against the risk of introducing extra bugs, the extra writing and maintenance time involved, etc.

Reality is that this sucks. It would be amazing if it wasn't actually super-super costly to organize human beings to all point in the same direction and make sure that people don't cheat. Government would be a lot cheaper and more efficient. But, alas, reality does suck.

bjeds · 5 years ago
I feel bad for the author for publishing this article.

If your (the author) mindset is that "everyone else is an idiot", be it management, or regulators, auditors or some other group that is not your group (engineer?), then unfortunately you have an attitude problem.

If furthermore you maliciously misinterpret the other group, saying "they want us to be compliant, not secure", based on misunderstanding the domain expertise _of your own group_ (!), then you are a liability to your business and should be kept at arms length from external auditors.

Because the author clearly has no clue what he is doing, and based on his technical shortcomings he is speaking down on others who are _actually_ doing their job correctly: the auditors.

Why is the author comparing bcrypt using 32 iterations with sha512crypt with 5000 iterations? Why not increase the sha512crypt iteration count by orders of magnitude if he want the hashcat test to fair equal or better under the testing methodology in use? Why is he using hashcat and basing decisions solely on that tool? Why is he using shacrypt at all and not a a proper KDF, such as PDKDF2, plugging in SHA2?

bjeds commented on Figma: The product design team’s process   figma.com/blog/inside-fig... · Posted by u/skilled
bjeds · 5 years ago
I'm not a designer and I don't work in a design team, so I don't have much to add to the article. However I worked together with Rasmus during the early years of Spotify. It's now almost 2021 and he is still - by far - the most productive (in the Hacker News sense) and unique person I've ever worked with.

It still boggles my mind that the same person can:

(1) one hand be that stereotypical designer with the scarfs and the small cups of coffee and the Leica cameras, designing user interfaces and logotypes and brands (Spotify logotype, Spotify green color), designing popular fonts for the Internet ( https://rsms.me/inter/ )

(2) on the other hand be a great low level engineer, creating programming languages, virtual machines ( https://github.com/rsms/sol ), text editors, stuff like GraphQL, etc

A one man army for sure.

bjornedstrom commented on Olbers' Paradox   en.wikipedia.org/wiki/Olb... · Posted by u/bookofjoe
thih9 · 5 years ago
I don’t have Chrome, could you elaborate? Where is the highlighter and what does it do?
bjornedstrom · 5 years ago
The link points to "https://en.wikipedia.org/wiki/Olbers%27_paradox#:~:text=In%2...."

In case that renders as a link by Hacker News, I've added a space here and removed the https part:

en.wikipedia.org/wiki/Olbers%27_paradox #:~:text=In%20astrophysics%20and%20physical%20cosmology,infinite%20and%20eternal%20static%20universe.

What it does is that it highlights that text in the page, with a yellow background color. Making the rest of the text difficult to read (your eyes are drawn to the very yellow highlighted part).

bjornedstrom commented on Olbers' Paradox   en.wikipedia.org/wiki/Olb... · Posted by u/bookofjoe
bjornedstrom · 5 years ago
That "#:~:text=" highlighter is so annoying it has made me switch from Google Chrome to Firefox.
bjornedstrom commented on Heavy is the Head that wears the AirPods Max   daringfireball.net/2020/1... · Posted by u/ch_sm
mfi · 5 years ago
Where in Stockholm do you live? IMO, you're giving an unfair and exaggerated view of Stockholm as a whole. Yes, there are some areas that are more affected by criminal gangs than other areas. But I wouldn't go as far as saying that there's a high risk of getting robbed "around Stockholm".
bjornedstrom · 5 years ago
I've lived in the inner city parts of Stockholm most of the time (Östermalm/Norrmalm, Södermalm, Kungsholmen).

I would definitely not wear 500-600 USD headphones in any of those areas.

But I think crime in Stockholm is a bit off topic. However I don't think the inherent risk of being robbed - wherever you are in the world - is off topic for the discussion.

People rob kids of Airpods all the time, because it's a status item. These new Airpods will be a status item too. This will increase the risk of robbery - be it in Europe or the US or elsewhere.

I'm sure there are larger cities in the world where the likelihood of getting robbed is low (Tokyo?), but that'd be the exception rather than the norm.

bjornedstrom commented on Heavy is the Head that wears the AirPods Max   daringfireball.net/2020/1... · Posted by u/ch_sm
bjornedstrom · 5 years ago
A bit off topic, but if you wear those around Stockholm, Sweden where I live, you will probably be robbed.

I never really understood the combination of noise cancellation and home use only. I think noise cancellation really shines when out and about in public, like the subway. But I can't imagine anyone using those things on the go, at least not where I live.

u/bjornedstrom

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