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Charon77

206 karma · joined March 20, 2021

charon@konekopi.com
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Charon77··on The tiny chip that powers Montreal subway tickets
I wonder why they don't use magnetic paper instead like how Japan is using? Seems cheaper
Charon77··on Why does current flow the opposite way from the electrons?
Wait, but protons would be negatively charged and particle physicists are going to be angry about it?
Charon77··on Resistance Against Git Merge Hell (2015)
There's this handy git config 'pull.rebase' in case you miss it.

A lot of the merge commit was triggered when you pull and merge instead of rebasing locally.

https://git-scm.com/book/en/v2/Git-Branching-Rebasing

Charon77··on The mobile home owners buying the land they live on
Isn't that like, the opposite of what living in trailers are supposed to mean?
Charon77··on Nintendo(1)
Could you elaborate? I think I totally miss this subtleties
Charon77··on Show HN: Sleepsort – Sorting While Sleeping
In case you're thinking of using this in production (please don't)

Keep in mind that there's a general limitation in most sleep implementation across languages.

sleep(x) typically waits for _at least x amount of time/second/millisecond

Therefore, there's a possibility that sleep(2) finishes after sleep(1) because the scheduler is lazy. The risk gets higher the closer the wait interval is to the scheduling rate (timer resolution).

So if you try running this with small amount of time, maybe in microseconds or nanoseconds, and you got items in the wrong order, this would be one explanation.

Charon77··on The new science of death: 'Something happening in the brain that makes no sense'
Sorry but this article feels overwhelmingly too theological for my liking.
Charon77··on Our Super-Secret Plan to Bring the Internet Back (Part 1)
Isn't this the Fediverse?
Charon77··on Show HN: Struct – A Feed-Centric Chat Platform
While I think this has promises, how can I convince my big corpo that uses slack to switch? Are there any slow rollout plan so people can try and see if they like it?
Charon77··on Gone in 20 seconds: how 'smart keys' have fuelled a new wave of car crime
I don't think the key has anything to do with it. It's the car that's actively looking for its keys
Charon77··on Tenets
That is what's called a leaky abstraction.

Think, how often do you write a javascript code and think to yourself to debug it by understanding the underlying assembler code. I'd guess it's nil.

But abstractions to html leaks a lot.

Leaky abstractions are never good as now you have to think about your cool framework and the underlying library.

Charon77··on Grabby Aliens (2021)
If a planet in the nearest star harbors life form that launched a rocket, would we know?
Charon77··on I moved my blog from IPFS to a server
I've always taken interest into p2p, but never heard of Freenet so thanks for being here!

Question: how good is the latency once connections are already established, say for a real time video call over Freenet, or if this is not possible? Is there any server in the middle that all packets need to route to, especially for peers behind firewall

Charon77··on I moved my blog from IPFS to a server
Well for torrent it starts by contacting one of the various trackers that know other peers. It's not centralized but there's only a couple of trackers out there.

There's no trust between any of the peers, but each of the torrent piece has associated hash, meaning peers cannot give you invalid data without being caught (unless hash collision occurs).

Peers can be discovered with DHT magic, but ultimately, can only be dialed if the ISP allows peers to receive connections.

Charon77··on Servers are (probably) starting to drop serial ports
> It's been very reliable so far, but sooner or later it's going to start failing.

It's not going to start to fall. The whole reason why serial port is there is to be the fallback access if everything else. It is a dumb and simple protocol, doesn't need any network to be configured.

I don't understand how serial is instead included in the complexity of networking, easily losing access if you accidentally bring down the interface or forgetting the IP.

You can't debug kernel boot because there is no networking when the kernel just started.

I think it's just obsession on complexity coupled with cutting down cost.

Charon77··on Starlink's Laser System Is Beaming 42M GB of Data per Day
Thanks, I was about to rant on this
Charon77··on Ask HN: How to re-kindle my interest in computer science?
I like to play Zachtronic's game like Tis-100 or the likes.

Maybe the issue is the monotonicity, so getting engaged with new 'toys' may help.

Charon77··on Scientists report asymmetry between heating and cooling
Well I mean there are more configurations in which a particle moves or otherwise vibrates, whereas there are less configurations with cooling.

It's like if you have sand and water, it's really quick to mix the two together, but waiting for them to settle requires minutes to hours.

Charon77··on Self-Consuming Generative Models Go MAD
We've been teaching humans with humans, using human made content.

Just because it doesn't work with AI now, doesn't mean it's something that wouldn't ever work.

Charon77··on Can ultraviolet lightbulbs end the next pandemic before it starts?
So because of some turn of events, I was enrolled in a privately owned school in Shenzhen, China, around the year of 2010, for a year.

In the primary school, all classes have UV lights to kill germs. So upon leaving the class, the last student would turn off the (normal) lights and turn on the UV lamps. In the morning they would ofc turn off the UV lamps and turn on the normal lighting.

I'm not gonna talk about efficacies or whether it causes harm, it might as well be placebos, but from what I know, it's kind of common to have.

Charon77··on Ask HN: 9-yo son wants to build a game, I'm lost. What can I do?
As much as I hate to say it, Roblox Studio is the way, especially seeing it has to be 3D.

It's pretty low barrier to entry thing

Charon77··on Japan ANA Boeing 737-800 flight turns back due to cockpit window crack
Great decision for turning back and not risking anything.
Charon77··on Ask HN: What is the best way to get into Physics as a coder?
Make simulators. Anything. Finite elements, diffusions

soon enough you'll learn about gradients, curls, and how to implement them

Oh, and play kerbal space programs

Charon77··on Why you can't divide by zero
A gradient is defined by dy/dx.

And it's associated with lines.

If you have gradient=2, you'll have a line that goes through origin and (1,2).

If you increase the gradient, it'll decrease the apparent 'dy'. You do it until the line becomes vertical, equivalent of dy=0. A vertical line is a valid object, but mathematically, it's no longer a function. You might say your math breaks describing the thing so you'll need a different math.

Charon77··on Reflections on learning programming
One thing I found weirdly absent is your interaction with the internet. I learned a lot during those time from codes at sourceforge and other sites before stackoverflow existed.

Perhaps it's the language barrier...

Charon77··on Alliance of 40 countries to vow not to pay ransom to cybercriminals, US says
> Partner countries will share a "black list" through the U.S. Department of Treasury that will include information on digital wallets being used to move ransomware payments

I don't think they realize how easy it is to generate new wallet. Nobody is going to use their home wallet address to demand ransom

Charon77··on Mazda slaps developer with cease-and-desist for DIY smart home integration
It's probably not that the sensor is bad. It's the location of the sensor that is tucked away in the interior foam so that it's not reading the air inside the cabin
Charon77··on ChatGPT and other AI tools could disrupt scientific publishing
That's true. If you don't use AI, others will. If that makes them profit, why would anyone not use it.

The whole system favors publication quantity over quality, results over process.

The solution is to ask our AI overlord.

Charon77··on Show HN: Building a 42-inch E-Ink frame for generative art
> We found that running 2 full white images did a good enough job, without disrupting the experience too much

Some devices actually clear by outputting the invert of the image. Maybe this will be faster

Charon77··on 'Overhyped' generative AI will get a 'cold shower' in 2024, analysts predict
How about alphafold? Prior usage requires quite literally weeks to months on supercomputers with results often not so comparable with the X ray crystallography.

Or the use of AI for real time upscaling that can be done in real time on low to medium GPU.

I think you only see chat gpt which don have its own draw back, but AI does not equal gpt, does not even has to be generative.

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