skysight-inc/HackerNews huggingface dataset:
Ask HN: Even if time travel was possible, wouldn't it still be impossible?
Apologies for the title :P but couldn't think of a better one.

This is just a shower thought I had the other day. As you will see, I know nothing about Physics, Astronomy etc, so please don't be too harsh.

Here goes:

Intuitively, it seems to me the observable universe can be sliced into a 3d grid with coordinates and we can track the relative position of things within it over time.

Since time and space are intertwined, if we had some means to travel back to a time-position point in the past on that grid, we'd accomplish time travel. Yay.

But... we don't know where we are in relation to the rest of the universe.

Even if our galaxy or cluster or whatever was moving in a given direction within the context of the observable universe, within the rest of the universe, we could still be moving net the opposite direction depending on what direction our observable universe is moving within the rest of the universe.

And since the rest of the universe isn't observable, we could never hope to construct any 3d grid with absolute time-position coordinates of anything.

Isn't this one (of many) reasons why time travel would be impossible?
http://isomorphisms.sdf.org/maxdama.pdf
Coincidentally I was just reading that the variation in other language's names for Germany is because the country originally federated a bunch of nation-states together, and its neighbors simply called the new country the name of whoever they had been dealing with prior

In any case it seems more respectful IMO to call a place the name by which it would be most recognized by that place's inhabitants. Practically, however, I learned the word 'Kiev' first, and 'Kyiv' just now, so Kiev it is.

Framing the differences here as disrespecting other people's culture is a bit of a stretch, though.
How is diversity of thought measured?
Artificial Intelligence and Smart Home – Part1
Non native English speaker most likely - his text is incoherent in a scattershot bad translation way (as opposed to a bad bot,) but there seems to be underlying meaning. Unless it's English translation from a gpt-3 bot in another language?

Funny that we have to suspect everything now.
if you waste your time, you will not war over it.

on edit: I see https://news.ycombinator.com/item?id=29146558 already made the point.
Also haven't heard anyone mention that early manual terms required using "ATDT" to dial with a touch tone phone because the default dialing method was rotary back then and there was no GUI.
You put in your IP address?
One thing though is that many lightweight block ciphers only have 128 bit keys. So in a PQ context, they will only provide 64 bit strength. Thus might be ok for short term secrets. But if you are building devices (IoT, SCADA) with long lifetimes, you may need to add a key derivation, key exchange scheme.
I've found the motors on the V2 already quiet so it's not really necessary until you need something the stock v4.2.x board doesn't offer.
At least in SV, not having the support staff to fully insulate engineers from these kinds of conversations is the norm, not the exception. If you are a run of the mill senior engineer at the highest paying companies in the the area you're expected to be able to have these conversations. My experience is that exceptions are only made for people who are true technical wizards.
They do not allow external links so there are no clicks.
Granted I'm no JS expert, but I believe that Python would be a better fit for OP due to the larger number of scientific computing libraries and OP's background as a mechanical engineer in addition to what you just mentioned. Someone else advised that OP leverage their ME background to help them learn programming, which IMO Python is very well suited for
Or BTE, ZigBee, LoRa. Esp for longer distances (things out in forests, industrial parks) Wifi is not the radio being used.
The key fundamental weakness (the susceptibility to man-in-the-middle attacks) was addressed in the original BB84 publication [1]:

The need for the public (non-quantum) channel in this scheme to be immune to active eavesdropping can be relaxed if the Alex and Bob have agreed beforehand on a small secret key, which they use to create Wegman-Carter multiple-message authentication tags for their messages over the public channel.

Of course immediately raises the question why one should use QKD at all. If a shared secret is required anyway, why not simply use symmetric cryptography?

In many modern articles, QKD is presented as a replacement for asymmetric cryptography. This I think is very misleading, since the reason for using asymmetric cryptography is that one does not need a shared secret.

[1] http://researcher.watson.ibm.com/researcher/files/us-bennetc...
clearly you've never seen Backstroke Of The West

https://www.youtube.com/watch?v=kqmdgNXlMYo&t=127s
>Something people don't remember is that long distance calling was not free, you couldn't call other area codes or states in the US without paying a per minute fee.

Here in New York, you couldn't even call within the same area code without paying a per minute fee and a connection charge. On Long Island the plans included unlimited calling to several close, adjacent towns, but calling towns even 10 miles away in the same area code incurred a substantial per minute surcharge.
No, if I say what I "searched" for they'll be able to relate the IP address that requested it to this account.
Yes, there are usually minimum spend requirements and other agreements for larger ad campaigns and ongoing relationships, especially with closed platforms like social networks that own the audience and platform.

Contracts also include termination terms but upfront deposits like these are more rare.
I got something more ominous for "hacker news": https://i.ibb.co/hYVPh6k/hacker-news.jpg
You're right overall that most of these places are a lot less flashy on the inside (have worked at a couple). Linear models everywhere as you said

However I think you're underestimating RenTech here. They're genuinely just in another league compared to what most people consider the "elite" quant shops. You're not getting in unless you're an actually impressive academic with a track-record, so I wouldn't be surprised if they're trying some weird stuff that other shops can't even understand (although I would imagine in small size vs. more vanilla stuff).

IMO places like JS/CitSec do a really good job of bombarding campuses to inculcate this idea they're the absolute apex of mathematical wizardry, but the places that are really doing some dark magic shit aren't trying to get undergrads to apply to them. Ofc maybe I'm falling for the same kind of propaganda for RenTech
It's an interesting subject, and i've some experience of photographic preservation having printed in darkrooms for 20 years or so.

When considering archiving old photographs, there's quite a bit of difference between colour and B&W prints, and also colour and B&W negatives. The B&W prints and negatives contain silver, which is what makes the dark spots on the print and negatives, and it's presence stops microbes attacking the material.

For colour prints and negatives, the silver that was originally present in the material is removed with a bleach stage when processing (with a dye being activated to produce the colours you see) so you need to use some other method to protect the material from microbes. I think modern colour film stock includes a stabilizer, whilst older processing used Formaldehyde.
This works for me.
Can someone explain what are the consequences of this? Can this be patched? Does this mean cracking games will be possible?
Is Viagra still cool? Asking for a friend...
As someone who isn't in the jailbreaking space I don't really know what this means. Can you sign your own PS5 code and run it on the hardware?
Thanks I'll try that. The behavior when memory is low is easily the worst part of desktop Linux
I’d love to see a version of python where bash was completely legal, and it could be easily mixed together for the ultimate shell scripting language with backwards compatibility. I’d call it pash.
That article says nothing about suicides increasing, which was your assertion. In fact, most data, including the data the CDC has available and the studies I referenced above, shows suicides are down, in some cases sharply.

This willingness to spread falsehoods in order to bolster a political view really needs to end.

Nevermind the irony of claiming that it's essential that everyone must stop "living in fear" immediately... which is then substantiated using inaccurate, fear-mongering claims of increased suicides and children experiencing learning and social development delays due to masks.
I have no idea LOL

But I've always thought a similar thing, that in Sci-Fi shows and so on, jumping in time would mean you would have to move in space too!

If you jumped back in an hour you'd be floating in space...

To time jump in the same building would require all sorts of prior knowledge about the 3D space... even the ground could be higher or lower... let alone the position of the actual planet.

Sci-Fi treats time and space as different things!
Some still do. I don't see the point though - a determined attacker could just make http requests to your bank and substitute the parts they want to. Would be on the attack domain still so still technically phishing... But if the image is an anti phish measure it's not a great one. I suppose it could raise the bar to a successful attack a bit but certainly doesn't make it impossible.
What "not wanting a goddamned military invasion" isn't enough of a motivation for defensive military? There is no need to go that abstract for actual defense as opposed to the old Orwellian euphemism in the Department of Defense.
Such a concept is tantamount to mind policing. I’m unsure how it is anything less than Orwellian.
HNers: what do you use telegram such that ads would be intrusive?
Oh, no, not Wicket anymore! Something like 12 years ago I was a fan of this framework and thought: "Finally, Swing for the web!". I really don't like the technical approach of Wicket with server-side UI stuff. The framework contradicts the nature of HTTP.

I think it is much cleaner to have a clean separation between server and client frameworks and use, for example, something like Quarkus on the server and Angular on the client and get the best on each side instead of a strange mixture.
This is so collossally stupendously irrelevant it's not funny.

How many batteries would it take to run your toy lawnmower for 10 hours? How much would those batteries weigh? How much would thos batteries cost? How long would it take to charge them all? Now multiply all that by about 10 or more for an ordinary bog standard small landscaping crew with several similar peices of equipment and several significantly larger than a homeowners toy mower. Now multiply that by all the landscaping crews. and the simple weight of all the dedicated battery trucks on the roads would be significant let alone the process of manufacturing them.

We do need to go as electric as possible but we don't actually posess the storage technology to do it yet. Swapping out a battery still doesn't come close to refilling a tank.

The functionality is not remotely equivalent yet.

Treating fantasy land as reality instead of a goal does not help us get to the goal. It just gives totally legitimate ammo to anyone who wants to say "Wow the libs are so stupid". Congratulations on that. Thanks for helping.
I love how they care about that while simultaneously being the most popular platform if you want to buy a fake vaccination certificate, hear about the latest conspiracy, download pirated software or meet your local nazi group. This is hilarious.
How would you program such a computer and what challenges would the engineers face while working on this system?
Scala at Scale at Databricks
Just wanted to say that you don't necessarily have to be a "programmer". You can pursue Cloud Certifications (Data Engineer, Scientist, DevOps, etc). Also, system implementation such as SAP, Dynamics, etc is another option. Good luck !!
Please stop “Edit this on GitHub ”
Instead, please link to the source file. I can find the edit button on GitHub myself.

When I'm reading on mobile, I'm not signed in on GitHub. The direct edit link gives me no other options than to sign in. I cannot view the source file.

I might not want to edit on GitHub directly, but use an editor/IDE instead.
"resigned" is not the term people in this echelon use. Literally just leaving their job for another one, but now they have some breathing room.
OS/2 allowed custom file attributes too, with search & retrieval.
This will hopefully keep out bad actors (spammers, fraudsters). If they can afford doing this, good on them.

Telegram is home to many cryptocurrency communities, the first thing I thought of when I saw this was that it's going to be heaven for phishers/fraudsters targeting those.
Better translation from: [0]

> It means ultimately that decrypted firmware files will be available for hackers. This would make reverse engineering of the PS5 firmware possible, and from there, open possibilities for finding future exploits and/or write custom firmwares or Homebrew enablers.

[0] https://wololo.net/2021/11/08/ps5-exploit-fail0verflow-show-...
I completely forgot I had done this, but I also got the census CSVs and wrote a script to spit out 10 random selections at a time, with optional middle name and our last names appended to each. I also included optional stats for each name on their popularity ranking for certain years. I came up with a short list of five or ten, compared lists with my partner, and the one name that our lists had in common was the winner.

The script and CSVs ultimately ended up not making a big difference in the decision (it was a significant name from my family) but the process was fun and yielded some interesting results.
There is only ONE
wow Safari is the IE5 of browsers now, having to do so many work arounds like we used to have to do with IE5 and now its killing hardware that you can't even replace.
Hmm, in that case, i'd have to say that we have nothing of the sort here in Latvia. In the Riga Technical University that i got my Bachelor's and Master's in, i completed the following degrees:

- Professional Master Degree in Computer Systems and Qualification of Programming Engineer
- Bachelor Degree Of Engineering Science in Computer Control and Computer Science

While the names might sound similar to what you're suggesting, the courses were still somewhat lacking in regards to the practical aspects that i mentioned above. Some of the lecturers did diverge from the officially approved contents and did teach us more, notably about CI/CD and DevOps concepts, as well as geospatial and temporal databases, and we did get some group projects where we implemented entire systems, taking on the roles of architects, developers, designers etc. and later talking about where we failed or what could have been improved, yet in my eyes that still isn't enough.

The curriculum was too slow to move otherwise, at least in my opinion - i guess that their way out of that situation is having the "Professional" degree, which requires you to do case studies and spend months working in an actual company, which in my case was just continuing to work at the company that i was already working at during my Bachelor's, which sort of reminds me of the guild/apprenticeship systems that i mentioned previously.

I might be wrong, but the balance between theory and practice ends up at an impasse often. Maybe degrees should just take longer to complete and cover things more thoroughly? Or do we as a society expect them not to be enough to make someone ready for working in the industry, and accept that as something normal?
As an interviewee I'd like this too, but as an interviewer I wonder if it actually has enough signal. One of the problems I've found with these kinds of conversations is that people can plausibly BS quite a bit about projects, or their role in them.

Maybe I started a new compiler or something at my company but didn't have the chops for it and the project flamed out. If I lie and said that all my goals were achieved and all the hard technical challenges were overcome, how can you tell?

Or maybe the project did succeed but someone else came up with the idea and led the efforts. I was there for the technical discussions and grilled the lead on why he made the choices he did, so now I can answer your questions and sound like I know what I'm talking about.

Software engineers can make a lot of money, the incentives to game the interview process are high and people attempt it often...
All I said was that the title should say approved in Australia for context on a site that is dominated by American news, politics, companies, and audience; not that it shouldn’t be posted. You’re jumping to conclusions.
Blame Blaze (Bazel) and it's file/directory/target globbing rules. Though, truthfully - I find ... far more meaningful as an extension of the unix "." for "this directory" and ".." for "parent directory".
One really good thing with the finalist algorithms is that they all provide authenticated encryption. For many IoT systems, authentication and integrity protection is way more important than condidentiality.

Many older lightweight algorithms (or AES) for that matter requires adding either an authentication mode, or another primitive (a hash function used in HMAC for example)

I believe that has led to a problematic proliferation of only having confidentiality protection in too many IoT systems deployed.

These candidates makes it easier for developers to add the security properties their system actually needs.
Telegram has much higher infrastructure costs due to their "unlimited size uploads", and channels/groups being non-e2ee = everything is stored forever.

Signal could run on benevolence. Telegram's debts were at 770M USD earlier this year. (https://archive.md/mGtgp)
I get why you don't want to have ads for stuff like drugs, alcohol and tobacco. But fast food?
Teacher posts hardcore calculus on Pornhub and OnlyFans to recruit students
Still an issue in latest 12.1 beta. Really frustrating. Just dropped a chunk of change on an M1 Pro too.
>and everyone likes seeing one in the summer with the top down and tunes cranking

I'm not so sure about that.
What is this exactly? Looks both interesting and intense
But both algorithms are confidentiality only, not AE. And they need a lot of rounds to provide any real security.
Currently 12.1 has this issue though.
Yes, this is exactly my point, we're getting at exactly the same thing! Like ok great you have the tech to travel through space and time... now how do you know where to go!?

Would really love to hear an answer from someone who knows any of this stuff. (not that we can trust random people on HN but still)
Perhaps a stroll through your own comment history (or the comments of any other HN (hacker news) user) would illuminate a lot of places where acronyms are used without introductions. TBH (to be honest) though, I'm not sure if every one of those should always have one or sometimes not.
San Jose, California. (but maybe not any longer)

You don't get snow and that kind of thing, which is lame, but...it used to be in the 'awesome' range pretty much all year long.

i'm in phoenix now, and we're just out of the brutal summer, and people who live here year-round rave about the weather during these non-summer months like, "ZOMG this place has the best weather in the world during these months!"

i'm like...you ever been to San Jose? 12 months.

i'm always reminded of the sign in redwood city:

Climate Best by Government Test

https://www.ecosia.org/images?q=redwood%20city%20sign%20weat...
Robert Anton Wilson or PKD might have liked this. I think it's adjacent. Reminds me of the Pi film. Pretty crazy.
I usually would do three things. One show me or tell me about some code you are proud off, some code you are not proud off and what your learned from it and finally teach me something interesting that can be code or something else.

I’m looking for confidence, ability to accept making mistakes and improving and finally the ability to convey information in a teachable fashion.
Router Freedom at risk: Latvia allows restrictions to consumers' rights
looks at greylisting table schema

looks at Rachel's blog post

looks at greylisting table schema again

Doh! :P
I don’t think I’ve seen anybody insist curl | sh is fine from untrusted sources.

In many contexts, curl | sh is an alternative to adding some kind of additional repository to install a third party package — and in most package managers this is done as root anyway, with arbitrary pre-install and post-install scripts.

I’m not really sold on how curl | sh (with https) is any less secure than blindly following steps to add a repo.

I used to strongly dislike curl | sh, and if there’s some looming security risk beyond accidentally trusting bad actors who couldn’t be bothered to go to all the effort of setting up a repo then I’d genuinely like to know.
Backups are deleted after six months not 30 days. 30 days is the default revision history kept for each file. Point still stands though.

source:
https://help.backblaze.com/hc/en-us/articles/217664898-What-...
Thanks! This is what I was looking for after google trips went off. Would be nice to have on android as well :)
> just a decent messaging app that makes it easy to remain anonymous

Anonymous from other users, not from the provider, right?
Yeah, any member of a team that isn't completely clueless will be able to convincingly claim that all of the achievements done by the team was achieved by the person alone.
Paging/Partitioning – Learn the Main Equations to Make It Easy
To me Computer Engineering should be about engineering computers. What runs on them is entirely secondary. Not really even involved, the people using the computer have to figure out how to develop that...
All true but the really bogus part IMO is that by default it would unfurl to the actual, bad URL but if you remove the &amp=1 param it unfurls to the good domain. Why is that?
I just changed jobs and I’m quite a bit more segmenty now. Though I like to think that for me being segmenty isnt about personal distance, but about stopping working (or worrying about work) on time each day.

I like meeting people and making friends, and even if I attain perfect work life balance that social aspect won’t change.
I would advise against trying to typeset lectures live, at least
for my courses. I structure my lectures as an abstract detective
work: start with a motivating problem or example, experiment with
it, distill the key ideas, formalize them into definitions, deduce
consequences (theorems, new problems). I expect my students to be
active participants at each step. Paper notes work well for this,
because they are both low overheard and sufficiently free-form.
From my experience, students that typeset or try to write overly
formal notes during class miss that crucial live narrative of my
lectures; that makes me sad because I spend a ton of effort in
this story-building.

I do think proper typesetting is a great idea afterwards, during
its own dedicated phase; it is like the report-building stage of
the detective work, where findings are revisited and structured so
the detective can reflect on the case, compare it with others and
have a reference for the future.

For anyone interested in my very opinionated patterns for latex
typesetting in Vim, I have a github page with vim templates [0] and
some demos at reddit [1].

[0] https://github.com/ykonstant1/dotfiles

[1] https://www.reddit.com/r/unixporn/comments/jtjol5/cinnamon_l...
The character is Unicode U+00AD, the soft hyphen: "= discretionary hyphen" / "commonly abbreviated as SHY" / "an invisible format character indicating a possible hyphenation location"

https://www.unicode.org/charts/PDF/U0080.pdf

I know of it, but apparently I've never previously pasted text using it into my text editor, because it's displayed there as a hyphen (though it is still U+00AD).

I'm wondering what CMS/editor outputs so many SHY characters.