ender7 (u/ender7) - Readit News

ender7 commented on Oxygen atoms discovered in most distant known galaxy eso.org/public/news/eso25... · Posted by u/sohkamyung

alex_young · 9 months ago

Water oceans? It’s far far from 30% isn’t it? Is there an image of a single water ocean not on Earth?

ender7 · 9 months ago

Due to some counterintuitive geothermal reasons, it's likely that three of the four Galilean moons (of Jupiter) as well as Titan (Saturn's largest moon) all sport significant underground oceans of liquid water.

For example, despite being much smaller than the Earth, Ganymede is projected to harbor more liquid water than all of Earth's oceans combined.

(Whether this adds up to 30% depends heavily on what you start counting as a "body")

ender7 commented on A Short Introduction to Automotive Lidar Technology viksnewsletter.com/p/shor... · Posted by u/kayson

rightbyte · a year ago

"Its particular superpower is that it can generate high resolution images of its surroundings much better than radar can."

Is this true tough? Car radars are fixed. I guess a comparable lidar would be fixed too and have n points for n lasers.

A rovolving radar would have continuous resolution around while a lidar samples?

I thought the advantage of lidars were accuracy and being better at measuring heights of objects, where as radars flatten the view.

ender7 · a year ago

The issue isn't one of fixed vs rotation, it's that radar can't fundamentally achieve the resolution necessary to distinguish important features in the environment. It's easily fooled by oddly-shaped objects, especially concave features like corners, and so while it's great for answer the question of "am I close to something" it's not reliable for telling you what that something is, especially at longer ranges.

ender7 commented on Is the 10k-Year-Old Yonaguni Monument a Man-Made Marvel or Nature's Art? ancientoriginsunleashed.c... · Posted by u/NoRagrets

ender7 · a year ago

Note that the only proponent of the man-made theory mentioned is Graham Hancock, a somewhat infamous Atlantis-chasing pseudoscientist and overall purveyor of extremely flimsy "ancient civilization" theories.

That doesn't mean that there aren't also legitimate archeologists who might be excited about these prospects, but the lack of their mention is...suspicious.

ender7 commented on Git Things matklad.github.io/2023/12... · Posted by u/nalgeon

ender7 · 2 years ago

> A better approach is to optimistically merge most changes as soon as not-rocket-science allows it, and then later review the code in situ, in the main branch. And instead of adding comments in web ui, just changint the code in-place, sending a new PR ccing the original author.

This may work for small projects or open source projects that generally receive high-quality PRs, but this sounds truly infeasible for large teams or organizations.

There are a couple reasons why the code review process occurs before merging. First, it helps keep the canonical version of the codebase in a "correct" state. This is, ironically, an extension of the "not rocket science" principle that the article mentions. Without this invariant, any checkout of the codebase might contain what is essentially "WIP" code that will waste other engineers' time if they have to interact with it. Second, the social pressure of blocking someone else's work is an important and necessary force for motivating code review. The idea that folks will go back and review code that's already been merged is akin to "will add tests in a followup PR". It's a pleasant lie we tell ourselves, but it rarely comes true.

Relatedly, the article also seems to suggest that the code REVIEWER should be providing the changes necessary after code review. This is problematic for so many reasons: first, it places an even higher burden on code reviewers' time which no one wants; second, it encourages poor code hygiene if someone else is just going to fix up your crappy work later on; third, it robs junior engineers of what is perhaps their most valuable learning experience: getting feedback from more experienced engineers and acting upon it.

(there are other issues here; the general thesis of the article leans heavily towards making code easier to _write_ rather than _read_, which again I think it just not appropriate for a codebase with a significant lifetime or number of contributors)

ender7 commented on Apple announces that RCS support is coming to iPhone next year 9to5mac.com/2023/11/16/ap... · Posted by u/dm

commoner · 2 years ago

Excellent. The next step is for Google to release a free and open source way for Android developers to build apps that send RCS messages. Currently, the only messaging app on Android that fully supports RCS is Messages by Google, which is closed source and requires Google Play Services to activate RCS features.

Also, end-to-end encryption is not part of the RCS specification, but is a proprietary extension to RCS that Google has made exclusive to Messages by Google.[1] This feature should be made open and added to the actual RCS specification so that Apple and other vendors can make use of it.

(Notes: There is a proprietary RCS API which Google only allows Samsung apps to use to communicate with Messages by Google.[2] Verizon has an app called Verizon Messages or Message+ that uses RCS to some extent, but this is an incomplete implementation that only works on Samsung devices on the Verizon network with no cross-carrier compatibility.[3])

[1] https://arstechnica.com/gadgets/2021/06/google-enables-end-t...

[2] https://www.xda-developers.com/google-messages-rcs-api-third...

[3] https://www.verizon.com/support/knowledge-base-222792/

ender7 · 2 years ago

I have no insider knowledge here, but Google tried to go the high route of working with carriers for years before giving up on their intransigence.

I suspect that Google's RCS is proprietary as a blunt instrument to prevent carriers from trying to either (a) undermine e2ee in some weasely way or (b) have the ability to pick and choose the pieces of the implementation they want to support. You either get the whole thing, with e2ee that you don't control, or nothing.

Sadly the lesson from Google, Apple, and Whatsapp here appears to be "cooperating with telecom carriers is a fool's errand".

ender7 commented on Tell HN: t.co is adding a five-second delay to some domains · Posted by u/xslowzone

PenguinCoder · 2 years ago

Additional details I wrangled for this rabbit hole. I don't think it's t.co doing this intentionally, but rather poor handling of 'do you have our cookies or not'. Everyone in this thread _proving things_ without taking into account the complexity of the modern web.

   man curl
       -b, --cookie <data|filename>
              (HTTP) Pass the data to the HTTP server in the Cookie header. It is supposedly the data previously received from the server in a "Set-Cookie:" line.

----

Add that option to your curl tests.

    ---
    $ time curl -s -b -A "curl/8.2.1" -e ";auto" -L https://t.co/4fs609qwWt -o /dev/null | sha256sum 
    eb9996199e81c3b966fa3d2e98e126516dfdd31f214410317f5bdcc3b241b6a2  -

    real    0m1.245s
    user    0m0.087s
    sys     0m0.034s
    ---

    $ time curl -s -b -e ";auto" -L https://t.co/4fs609qwWt -o /dev/null | sha256sum 
    eb9996199e81c3b966fa3d2e98e126516dfdd31f214410317f5bdcc3b241b6a2  -

    real    0m1.265s
    user    0m0.103s
    sys     0m0.023s
    ---

    $ time curl -s -b -A "Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Firefox/102.0" -e ";auto" -L https://t.co/4fs609qwWt -o /dev/null | sha256sum 
    eb9996199e81c3b966fa3d2e98e126516dfdd31f214410317f5bdcc3b241b6a2  -

    real    0m1.254s
    user    0m0.100s
    sys     0m0.018
    ---

ender7 · 2 years ago

I can replicate this behavior fairly easily in a browser.

  1. Open incognito window in Chrome
  2. Visit https://t.co/4fs609qwWt -> 5s delay
  3. Open a second tab in the same window -> no delay
  4. Close window, start a new incognito session
  5. Visit https://t.co/4fs609qwWt -> 5s delay returns

ender7 commented on Toyota unveils 8.7 kWh battery for residential applications pv-magazine.com/2022/06/0... · Posted by u/xbmcuser

ender7 · 4 years ago

Just for comparison, the extended-range Ford Lightning pickup truck (the one that can power a home for three days) has a 131 kWh battery.

ender7 commented on Expanding Fuchsia's open source model opensource.googleblog.com... · Posted by u/tbodt

ender7 · 5 years ago

I'm a little sad that there aren't any comments describing what is technically novel around Fuchsia and why it is/why it isn't interesting from an OS design standpoint.

I get the sense that its advances are probably too low-level for most app developers to care, but that's kind of precisely why I'd love a comment elucidating them a bit.

Edit: For example, the Fuchsia docs list the primary talking points as secure, updatable, inclusive, and pragmatic. How well does it live up to those principles? Will they bring practical benefits? What's exciting/new about what's being done here?

ender7 commented on Washington crews destroy first U.S. “murder hornet” nest axios.com/washington-stat... · Posted by u/cwwc

ineedasername · 5 years ago

The department may very well need more significant resources to continue this fight, as will surrounding states if Washington isn't effective in fighting this.

I'm not against government spending. I think there are plenty of problems that market forces alone cannot solve. I think the government should provide a solid safety net for its citizens. That is precisely why I lament the resources required for this. They are absolutely necessary, and at the same time it means there are fewer resources to go to other absolutely necessary needs.

ender7 · 5 years ago

I don't see what there is to lament. If this is necessary spending (it seems it is) and there is other necessary spending, then it seems we must pay for both of those things.

I guess we could wish that the hornets never arrived here, but the life of a government is solving thousands of problems like these. If not the hornets, it would be something else. The uplifting moment is that this was a successful containment. Money well-spent :)

ender7 commented on Statement on Google’s conduct by founder of CelebrityNetWorth.com (2019) [pdf] docs.house.gov/meetings/J... · Posted by u/mosiuerbarso

DanBC · 5 years ago

You may want to read these posts:

https://news.ycombinator.com/item?id=9977372

https://news.ycombinator.com/item?id=5419890

ender7 · 5 years ago

I have to say, after reading those posts, Matt is looking more trustworthy than the OP.

Especially considering the definitely-not-a-sock-puppet post by jimboykin [1], an account that was created immediately after this thread and has but a single post on HN.

[1] https://news.ycombinator.com/item?id=5476100