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hkwerf commented on A $100 DIY muon tomographer   spectrum.ieee.org/diy-muo... · Posted by u/Luc
hkwerf · a year ago
Back when I was a physics student, I helped engineer exactly this experiment as a off-the-shelf solution for schools as a classroom experiment! We used PMTs mounted on top of coffee cans:

http://kamiokanne.uni-goettingen.de/gb/kamiokanne.htm

The FTL muons produce Cherenkov radiation in the water in the coffee cans, which is picked up by the PMTs.

Using this setup gives a much higher rate, as the surface is much larger compared to geiger tubes. Thus it's possible to quickly capture a sufficient amount of muons.

hkwerf commented on Torvalds: You can avoid Rust as a C maintainer, but you can't interfere with it   arstechnica.com/gadgets/2... · Posted by u/shepmaster
SSLy · a year ago
maybe generic implementations of crypto primitives and math kernels.
hkwerf · a year ago
It strikes me that the former would profit from a strong type system, whereas the latter could profit from (enforced) strict aliasing.
hkwerf commented on Torvalds: You can avoid Rust as a C maintainer, but you can't interfere with it   arstechnica.com/gadgets/2... · Posted by u/shepmaster
bayindirh · a year ago
Directly programming hardware with bit-banging, shifts, bitmasks and whatnot. Too cumbersome in ASM to do in large swaths, too low level for Rust or even for C++.

Plus for that kind of things you have "deterministic C" styles which guarantee things will be done your way, all day, every day.

For everyone answering: This is what I understood by chatting with people who write Rust in amateur and pro settings. It's not something of a "Rust is bad" bias or something. The general consensus was, C is closer to the hardware and allows handling of quirks of the hardware better, because you can do "seemingly dangerous" things which hardware needs to be done to initialize successfully. Older hardware is finicky, just remember that. Also, for anyone wondering. I'll start learning Rust the day gccrs becomes usable. I'm not a fan of LLVM, and have no problems with Rust.

hkwerf · a year ago
Why exactly would it be too low-level for Rust?
hkwerf commented on 'The tyranny of apps': those without smartphones are unfairly penalised   theguardian.com/money/202... · Posted by u/zeristor
unsupp0rted · a year ago
> He does own a smartphone – an Apple iPhone he bought secondhand about three years ago – but says: “I don’t use apps at all. I don’t download them for security reasons.”

Yes and?

He makes a choice and he is being penalized for it. Presumably the benefits for him outweigh the costs. For Richard Stallman they do.

There is no innate human right to grocery store coupons or private parking lots.

hkwerf · a year ago
I have to install an app to communicate with my child's state-sponsored daycare. I'll have to install an app to communicate with the teachers at his future school. Is this still fine?

It'd be one thing, if it were just apps. But all of these apps are essentially just containers for some web application.

Do you get access to the web application without the app? No.

So what's the point of the apps? So they can send you notifications and annoy you with irrelevant updates concerning other groups at the same daycare all day long, because they don't care to filter?

hkwerf commented on Launch HN: Massdriver (YC W22) – Self-serve cloud infra without the red tape    · Posted by u/coryodaniel
hkwerf · a year ago
Just an FYI: If I select "Features" / "API First" on your page, I end up at a 404.
hkwerf commented on Docker limits unauthenticated pulls to 10/HR/IP from Docker Hub, from March 1   docs.docker.com/docker-hu... · Posted by u/todsacerdoti
a022311 · a year ago
That will most likely fail, since the daemon tries to connect to the registry with SSL and your registry will not have the same SSL certificate as Docker Hub. I don't know if a proxy could solve this.
hkwerf · a year ago
> since the daemon tries to connect to the registry with SSL

If you rewrite DNS, you should of course also have a custom CA trusted by your container engine as well as appropriate certificates and host configurations for your registry.

You'll always need to take these steps if you want to go the rewrite-DNS path for isolation from external services because some proprietary tool forces you to use those services.

hkwerf commented on Apple pulls data protection tool after UK government security row   bbc.com/news/articles/cgj... · Posted by u/helsinkiandrew
GJim · a year ago
> other than the possibility of leaks of the nation’s most sensitive data

Amusing when you consider the National Cyber Security Centre (NCSC, a part of GCHQ), along with the Information Commissioners Office, both publish guidance recommending, and describing how to use, encryption to protect personal and sensitive data.

Our government is almost schizophrenic in its attitude to encryption.

hkwerf · a year ago
I suppose they don't believe certain facts engineers are telling them. With Brexit it was coined "Project Fear". Now they're being told that adding backdoors to an encrypted service almost completely erodes trust in the encryption and, as in the case with Apple here, in the vendor. However, I suppose it is very hard to find objective facts to back this. I'd guess this is why Apple chose to both completely disable encryption and inform users about the cause.

Now we're probably just waiting for a law mandating encryption of cloud data. Let's see whether Apple will actually leave the UK market altogether or introduce a backdoor.

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u/hkwerf

KarmaCake day404June 30, 2021View Original