[HN Gopher] Cool ice formations my friend discovered on his deck...
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Cool ice formations my friend discovered on his deck this morning
Author : davidbarker
Score : 147 points
Date : 2022-02-06 15:55 UTC (7 hours ago)
(HTM) web link (twitter.com)
(TXT) w3m dump (twitter.com)
| dmckeon wrote:
| In caves, things like this would be called helictites.
| https://en.wikipedia.org/wiki/Helictite
| jwandborg wrote:
| > They can be easily crushed or broken by the slightest touch.
| Because of this, helictites are rarely seen within arm's reach
| in tourist caves.
|
| Wonderful bit of Gitchhiker's Guide to the Galaxy-esque comedy.
| chmod600 wrote:
| It looks like the suggestion of extruding ice (in another
| comment) seems more plausible than a kind of capillary action
| as you suggest.
| robocat wrote:
| For it to be extruding ice, the top of the railing would need
| to be full of water (which seems unlikely), and there need to
| be multiple holes in the railing of the same cross-section
| (which also seems unlikely).
|
| Because it is snowing an ice cap can form on top of the rail,
| and if the railing is warmer than freezing (for example if
| the air is above freezing), then heat can be transferred to
| the bottom of the ice cap, and water can come out the sides
| of the ice cap?
|
| Aside: I saw something similar recently while I was playing
| with a Himalayan salt block candle holder, placed on a plate,
| placed on a wood burner. Wetting the outside of the holder
| with a sprayer causes the salt to dissolve and the brine
| pools in the plate. As the brine pool dries due to the heat,
| salt forms an impermeable crust on the pool, and then the
| brine dries from the edge of the pool. The dried salt slowly
| extends over the plate, and it then goes over the edge of the
| plate and the salt dries on the underside of the plate. The
| heat of the wood burner speeds up the process. I originally
| saw the process happen to the salt block over months of time
| while it was sitting on a dish, sitting in an environment
| that is sometimes humid and sometimes dry. Edit: image
| https://im.ge/i/XfAm8P
| JulianMorrison wrote:
| Looks similar to the fluffy ice that forms on wood and was
| recently discovered to be caused by a fungus.
| dade_ wrote:
| Ice jellyfish have been in the news lately, but I prefer this
| ribbon ice. https://www.pentictonwesternnews.com/community/ice-
| jellyfish...
| zipotm wrote:
| Strange attractors saying "Hello!"
| meetups323 wrote:
| But aren't we all?
| gus_massa wrote:
| Something similar has been discussed in the past " _Extruding Ice
| from Steel Fences and Pipes with Diurnal Freeze /Thaw_"
| http://my.ilstu.edu/~jrcarter/ice/diurnal/extrude/ , but most of
| the links are dead :( :( :(
|
| https://news.ycombinator.com/item?id=2089306 (148 points | Jan
| 10, 2011 | 13 comments)
|
| https://news.ycombinator.com/item?id=26121775 (261 points | 11
| months ago | 21 comments)
|
| Anyway, from one of the comments I got this video " _Extruding
| Ice From A Steel Pipe- Time Lapse_ "
| https://www.youtube.com/watch?v=nbiEfr5FxEA
| hatware wrote:
| A natural, sub-zero, 3D printer. Neat.
| inetsee wrote:
| A link to some more pictures:
| https://www.kosmosjournal.org/news/frost-flowers-natures-exq...
| _Microft wrote:
| Internet archive to the rescue! This is not a particular
| capture by the way, only one that still had content on the
| page:
|
| https://web.archive.org/web/20190216145020/http://my.ilstu.e...
| jonnycomputer wrote:
| Was coming in to say the same thing.
|
| Super cool though.
| anderspitman wrote:
| Sorry if this is too OT but does anyone know the name of the
| phenomenon when a bottle of water in a freezer gets just cold
| enough that if you shake it a little it instantly turns into
| slush?
| detaro wrote:
| https://en.wikipedia.org/wiki/Supercooling
| 0des wrote:
| Twitter dislikes VPN users so it is unviewable for me, just
| endless refreshing
| tomxor wrote:
| Do you find the same with Google?
|
| Google seems to periodically block me outright, sometimes I can
| get around it by switching servers but it becomes infuriatingly
| obvious the high percentage of sites that integrate and depend
| on Google (fonts, CDNs, map apis when there isn't even a
| frickin map in the page)... when everything just hangs on foo-
| api.google.com you start hating Google.
| 0des wrote:
| I don't know, I haven't tried, I do not communicate with
| Google properties.
| _Microft wrote:
| https://nitter.net/CJF_NC/status/1490093486330322949
| cmurf wrote:
| Off topic rant, BUT I'm gonna...
|
| What is this? Why is it so much faster, and mobile friendly
| layout than either Twitter.com or their mobile app? And why
| does Twitter.com spam me with an overlay telling me to use
| the mobile app before I can see a tweet? Why do they care so
| much about me using the mobile app that I get spammed
| everytime I click a twitter.com link, only on mobile?
| sva_ wrote:
| Much easier to mine data about people through an app, and
| also other kinds of stuff that it enables.
| Tistron wrote:
| Wow, that loads immediately and actually shows the content in
| a useful way.
|
| Thank you!
| autoexec wrote:
| Thanks, I haven't bothered clicking on any twitter links
| since they started insisting on everyone allowing javascript.
| nitter.net seems to solve that problem for me :}
| jonnycomputer wrote:
| I read twitter without an account. Twitter tries all kinds
| of things to get me to log in. Now it blocks too much
| scrolling on a particular person's tweets.
| cbozeman wrote:
| It's this kind of user-unfriendly design that makes me
| want to abandon all social media.
| _Microft wrote:
| I am glad I could help! If nitter.net itself is not
| working, you can pick a mirror from this list:
|
| https://github.com/zedeus/nitter/wiki/Instances
| 0des wrote:
| Thank you, I wonder if I can somehow automatically twitter ->
| nitter in my hosts file or something.
| StingyJelly wrote:
| Privacy Redirect firefox browser plugin can do that:
| https://github.com/SimonBrazell/privacy-redirect
| halostatue wrote:
| It doesn't help in-browser, but if you're on macOS and
| using Finicky, you can add this to your `~/.finicky.js`
| under the `rewrite` rules: {
| match: ({ url }) => url.host === 'twitter.com',
| url: ({ url }) => { return { ...url, host:
| 'nitter.net' } }, },
|
| It goes along quite nicely with my `medium.com` to
| `scribe.rip` rule: { match: ({
| url }) => url.host.endsWith('medium.com'), url:
| ({ url }) => { return { ...url, host:
| 'scribe.rip' } }, },
|
| (It should be possible to make it pick a random list from
| nitter mirrors.)
|
| EDIT: Improved version that picks from random nitter
| redirectors
| (https://github.com/zedeus/nitter/wiki/Instances#third-
| party-...). It needs the following declared at the top of
| the `finicky.js` file: const NITTER_HOSTS
| = ['twiiit.com', 'twitit.gq'] const nitterHost
| = () => NITTER_HOSTS[Math.floor(Math.random() *
| NITTER_HOSTS.length)]
|
| Then the rewrite rule is: {
| match: ({ url }) => url.host === 'twitter.com',
| url: ({ url }) => { return { ...url, host:
| nitterHost() } }, },
| bmgxyz wrote:
| I use the Redirector[0] browser extension to do this, and
| it works great.
|
| [0]: https://einaregilsson.com/redirector/
| 0des wrote:
| Good lookin' out, thanks
|
| Edit: Here's the config I use to twitter -> nitter
| Redirect: https://twitter.com/\* to:
| https://nitter.net/$1 Hint: Any word after
| twitter.com leads to nitter
| Example:https://twitter.com/some-username -
| https://nitter.net/some-username Applies to: Main
| window (address bar), IFrames
|
| That got me wondering what other frontends there are for
| popular sites, and though I don't use reddit, I know a
| lot of folks do, so this should work for a thing I just
| found called 'teddit' which is inspired by Nitter
| Redirect: https://reddit.com/* to:
| https://teddit.net/$1 Hint: Any word after
| reddit.com leads to teddit Example:
| https://reddit.com/u/some-username -
| https://teddit.net/u/some-username Applies to:
| Main window (address bar), IFrames
| dublinben wrote:
| Here's a great compilation of privacy-preserving, JS-free
| front-ends for many popular sites like Twitter, Reddit,
| Youtube, and more:
| https://github.com/mendel5/alternative-front-ends
| 0des wrote:
| Thanks!
| YaBomm wrote:
| Probably should drive some drain holes at the bottom of that
| railing?
| __MatrixMan__ wrote:
| I think it's called ribbon ice.
|
| I've always thought it would be cool to have containers that are
| designed to extrude it so that before a storm comes you could
| fill them with water and have a transient art thing happen.
|
| I think that the temperature requirements are rather specific, so
| you might also need some kind of temperature control widget to
| make it happen more reliably.
| tobr wrote:
| This made me remember a strange phenomenon I noticed a winter day
| a few years ago. In a park with some trees there was consistently
| less snow coverage in a line going away from each tree, always in
| the same westward direction. Basically following a shadow of the
| tree. Looking around at other objects I also noticed the
| phenomenon next to some signs and metal poles.
|
| What could explain this? I could understand if there were _more_
| snow or ice in the shadow, as the ground would be colder there,
| but why would there be less?
| quercusa wrote:
| The trees reflecting afternoon sun?
| AYBABTME wrote:
| Probably prevailing wind conditions.
| sjg007 wrote:
| It's probably windy and the snow piles up on the windy side of
| the tree.
| minitoar wrote:
| Possibly less vegetation in shadow of these objects, and
| therefore less insulation between snow and warmer earth.
| Philip-J-Fry wrote:
| Probably was snowing gently at some point and then later on it
| got windy and was blowing west.
| winrid wrote:
| It's like the ice version of tin whiskers.
| engineer_22 wrote:
| This is called hoarfrost
| drewcoo wrote:
| The spiraling icicles in the photo are not hoarfrost.
|
| Wind conditions there must me interesting.
| CommieBobDole wrote:
| I don't think that's correct - hoarfrost is sort of a feathery
| looking frost that forms from water vapor in the air on cold,
| clear nights.
|
| This looks more like ice created from water freezing inside
| something and being extruded through cracks or holes.
| CrazyStat wrote:
| Hoarfrost is ice crystals that grow in place, which is
| different. This looks to be formed by extrusion.
| smoldesu wrote:
| That's... phonetically unfortunate.
| soheil wrote:
| I wonder if the underlying mechanism responsible for forming
| these ice formations are the same as that of plants and vines. It
| seems to me the boundary between what we call alive vs not is
| getting ever blurrier.
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(page generated 2022-02-06 23:00 UTC)