dynm (u/dynm) - Readit News

dynm commented on Privately-Owned Rail Cars amtrak.com/privately-owne... · Posted by u/jasoncartwright

dynm · 2 days ago

If you're wondering the most obvious thing:

- Cost per mile: $4.72

- Minimum charge: $2296

There are also a huge number of other fees that I can't tell if you'd need to pay in practice, e.g.:

- Additional Locomotive Fee (per loco mile): $7.54

- Amtrak Locomotive Daily Charge: $2513

- Head End Power Daily Charge: $3433

- Annual Administrative Fee: $574

https://www.amtrak.com/content/dam/projects/dotcom/english/p...

dynm commented on Countrywide natural experiment links built environment to physical activity nature.com/articles/s4158... · Posted by u/Anon84

dynm · 5 days ago

I'm confused. Usually a "natural experiment" is a chance event that affects some random subset of a population. Here, they seem to be using "natural experiment" to refer to the event that someone decides to move to a different city. But obviously the subset of people in Amarilllo, TX who decide to move to New York, NY are going to be somewhat different than the subset who don't. So isn't this confounded?

It's really strange that they just jump into the paper and keep saying "natural experiment" over and over again without any justification that they actually have one. They do eventually get to this in the "Selection effects in relocation and mobile app usage" section, but I think they really downplay the seriousness of the issue.

dynm commented on New colors without shooting lasers into your eyes dynomight.net/colors/... · Posted by u/zdw

perching_aix · a month ago

So change your router settings to offer a different default DNS via DHCP? Maybe configure your device(s) to use some other specific DNS servers rather than the ones offered via DHCP?

For the site operator: the domain is present in the Spamhaus DBL (Domain Block List), which is presumably why these lovely gents are having issues, might wanna check that out.

dynm · a month ago

Thanks for pointing this out. I submitted a request to spamhaus but it's an auto-responder black hole that tells me to contact my "IT department". (My personal blog, oddly enough, does not have one.) They don't explain why this domain which has no ads, sells nothing, and never sends email would be listed.

dynm commented on 'Positive review only': Researchers hide AI prompts in papers asia.nikkei.com/Business/... · Posted by u/ohjeez

dynm · 2 months ago

Just to be clear, these are hidden prompts put in papers by authors meant to be triggered only if a reviewer (unethically) uses AI to generate their review. I guess this is wrong, but I find it hard not to have some sympathy for the authors. Mostly, it seems like an indictment of the whole peer-review system.

dynm commented on Meta announces Oakley smart glasses theverge.com/news/690133/... · Posted by u/jmsflknr

make3 · 2 months ago

I don't think we should normalize pointing cameras at people's faces all the time. I hate these things.

dynm · 2 months ago

Maybe they have some light to show if they're on. But is everyone supposed to just know that? Pointing a video camera at everyone you talk to is an... interesting social choice. Glasses like these should be designed with a physical mechanisms to cover the cameras.

dynm commented on DumPy: NumPy except it's OK if you're dum dynomight.net/dumpy/... · Posted by u/RebelPotato

shiandow · 3 months ago

That is amazing. My main doubt would be how future proof this is. Does it wrap numpy? Or something equivalent? Does it require continuous development to keep up?

Also I both understand the need for declaring the matrices up front and think it's a bit of a shame that it is not seamless.

Here are some (ill-advised?) alternatives:

    X, Y, Z = dp.Slots()
    
    with dp.Slot() as X:
        ...
    
    import dp.Slot as new
    X = new['i','j'] = ...

    X = dp['i','j'] = ...

dynm · 3 months ago

(author here) This wraps JAX and JAX's version of NumPy. It would surely require some development to keep up, although it's quite short and simple (only 700 lines), so I don't think it would be a big burden. That said, I should be clear that my goal here is just to show that this is possible/easy, and possibly inspire existing array packages to consider adding this kind of syntax.

I like your alternatives! I agree that having to write

  X = dp.Slot()

before assigning to X is unfortunate. I settled on the current syntax mostly just because I thought it was the choice that made it most "obvious" what was happening under the hood. If you really want to, you could use the walrus operator and write

  (X := dp.Slot())['i','j'] = ...

but this cure seems worse than the disease...

Actually, doing something like

  X = new['i','j'] = ...

could simplify the implementation. Currently, a Slot has to act both like an Array and a Slot, which is slightly awkward. If new is a special object, it could just return an Array, which would be a bit nicer.

dynm commented on Energy drinks linked to rise in colorectal and blood cancer thenightly.com.au/society... · Posted by u/_xerces_

dynm · 3 months ago

From the title, I read this expecting another lame observational study which I would probably distrust on the basis that it doesn't show anything causal. It's not that! Rather, if I understand it, they (1) took mice and introduced leukemia cells and (2) took human leukemia cell lines. In both cases, they found biomarkers related to leukemia growth.

(I welcome corrections to that understanding from experts!)

Personally, this seems far from convincing evidence that taurine in energy drinks is actually causing cancer. But it is suggestive and it seems like one might reasonably avoid taurine out of an "abundance of caution".