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Power over Ethernet (PoE) basics and beyond

https://www.edn.com/poe-basics-and-beyond-what-every-engineer-should-know/
109•voxadam•5d ago•63 comments

rlsw – Raylib software OpenGL renderer in less than 5k LOC

https://github.com/raysan5/raylib/blob/master/src/external/rlsw.h
137•fschuett•7h ago•28 comments

OpenBSD 7.8 Released

https://cdn.openbsd.org/pub/OpenBSD/7.8/ANNOUNCEMENT
85•paulnpace•2h ago•16 comments

Replacing a $3000/mo Heroku bill with a $55/mo server

https://disco.cloud/blog/how-idealistorg-replaced-a-3000mo-heroku-bill-with-a-55-server/
486•jryio•8h ago•340 comments

LLMs can get "brain rot"

https://llm-brain-rot.github.io/
321•tamnd•14h ago•181 comments

Show HN: Modshim – a new alternative to monkey-patching in Python

https://github.com/joouha/modshim
15•joouha•5d ago•3 comments

Neural audio codecs: how to get audio into LLMs

https://kyutai.org/next/codec-explainer
342•karimf•15h ago•103 comments

The Hidden Engineering of Niagara Falls

https://practical.engineering/blog/2025/10/21/the-hidden-engineering-of-niagara-falls
69•chmaynard•5h ago•1 comments

Ask HN: Our AWS account got compromised after their outage

223•kinj28•12h ago•57 comments

Wikipedia says traffic is falling due to AI search summaries and social video

https://techcrunch.com/2025/10/18/wikipedia-says-traffic-is-falling-due-to-ai-search-summaries-an...
321•gmays•1d ago•301 comments

NASA chief suggests SpaceX may be booted from moon mission

https://www.cnn.com/2025/10/20/science/nasa-spacex-moon-landing-contract-sean-duffy
254•voxleone•15h ago•740 comments

ChatGPT Atlas

https://chatgpt.com/atlas
601•easton•11h ago•571 comments

Mathematicians have found a hidden 'reset button' for undoing rotation

https://www.newscientist.com/article/2499647-mathematicians-have-found-a-hidden-reset-button-for-...
112•mikhael•5d ago•78 comments

Rectal oxygen delivery might soon be a real medical treatment

https://arstechnica.com/science/2025/10/butt-breathing-might-soon-be-a-real-medical-treatment/
133•zdw•5h ago•63 comments

Show HN: AutoLearn Skills for self-improving agents

https://www.autolearn.dev
3•toobulkeh•1h ago•1 comments

Getting DeepSeek-OCR working on an Nvidia Spark via brute force with Claude Code

https://simonwillison.net/2025/Oct/20/deepseek-ocr-claude-code/
137•simonw•1d ago•25 comments

Build your own database

https://www.nan.fyi/database
421•nansdotio•12h ago•64 comments

60k kids have avoided peanut allergies due to 2015 advice, study finds

https://www.cbsnews.com/news/peanut-allergies-60000-kids-avoided-2015-advice/
307•zdw•1d ago•278 comments

Minds, brains, and programs (1980) [pdf]

https://home.csulb.edu/~cwallis/382/readings/482/searle.minds.brains.programs.bbs.1980.pdf
60•measurablefunc•1w ago•25 comments

Understanding conflict resolution and avoidance in PostgreSQL: a complete guide

https://www.pgedge.com/blog/living-on-the-edge
28•birdculture•1w ago•1 comments

Doomsday scoreboard

https://doomsday.march1studios.com/
191•diymaker•8h ago•88 comments

What do we do if SETI is successful?

https://www.universetoday.com/articles/what-do-we-do-if-seti-is-successful
131•leephillips•1d ago•216 comments

Foreign hackers breached a US nuclear weapons plant via SharePoint flaws

https://www.csoonline.com/article/4074962/foreign-hackers-breached-a-us-nuclear-weapons-plant-via...
339•zdw•12h ago•231 comments

Flexport Is Hiring SDRs in Chicago

https://job-boards.greenhouse.io/flexport/jobs/5690976?gh_jid=5690976
1•thedogeye•11h ago

The death of thread per core

https://buttondown.com/jaffray/archive/the-death-of-thread-per-core/
94•ibobev•1d ago•38 comments

Cdb: Add support for cdb64

https://cdb.cr.yp.to/download.html
75•kreco•4h ago•21 comments

Show HN: Katakate – Dozens of VMs per node for safe code exec

https://github.com/Katakate/k7
96•gbxk•13h ago•36 comments

Erowid - Documenting the Complex Relationship Between Humans and Psychoactives

https://www.erowid.org
27•slow_typist•8h ago•1 comments

KDE Connect: Enabling communication between all your devices

https://community.kde.org/KDEConnect
393•snthd•1w ago•161 comments

Diamond Thermal Conductivity: A New Era in Chip Cooling

https://spectrum.ieee.org/diamond-thermal-conductivity
178•rbanffy•17h ago•59 comments
Open in hackernews

Rectal oxygen delivery might soon be a real medical treatment

https://arstechnica.com/science/2025/10/butt-breathing-might-soon-be-a-real-medical-treatment/
133•zdw•5h ago

Comments

nakamoto_damacy•3h ago
Beavis and Butt-Head quality entertainment on HN.
vlovich123•3h ago
Could this completely obviate tracheotomies and ventilators?
themafia•3h ago
> The team recruited 27 healthy adult men in Japan, each of whom received a dose of non-oxygenated perfluorodecalin via the anus. They were asked to retain the liquid for a full hour as the dosage slowly increased from 25 to 1,500 mL. Twenty of the men successfully completed the experiment.

7 of them went home and never spoke of it again.

qgin•3h ago
Why Japan? Seems like there has to be a story here.
brk•3h ago
They were simultaneously filming for a TV game show.
0cf8612b2e1e•2h ago
Only half knew it was a game show. The others did not want to rock the boat.
weird-eye-issue•3h ago
Because the researchers are Japanese? Sorry but what kind of question is this?
weird-eye-issue•3h ago
That's a lot of liquid to retain, it would feel very weird
stronglikedan•2h ago
But it would feel amazing upon release
esjeon•2h ago
That sounds like an amazing sh*t.
highfrequencyy•2h ago
How did they advertise this experiment?
timerol•3h ago
I really expected this to be overblown clickbait, but the article delivers on the title about as well as it could. I have seen many more breathless articles on treatments that weren't already conducting human safety trials as well as having animal effectiveness trials concluded.

And yeah, it turns out that mammals can absorb oxygen through their butts. Weird

leoh•3h ago
Not really. Said tissues are well vascularized and therefore lend themselves to oxygen exchange. It’s just that the lungs are especially efficient for this.
0cf8612b2e1e•1h ago
Supposedly end stage alcoholics will give themselves alcohol enemas to more readily absorb the alcohol. More direct exposure to the veins.

Which sounds like a fake urban legend, but I would never discount want an addict is capable of doing.

agobineau•1h ago
it pretty common. a lot of people in my high school did this, or froze beer and inserted it to get rapidly wasted. the other classic is the tampon soaked in vodka

most of this was just done because drinks were too expensive or hard to get for high schoolers and they had to optimise their alcohol supplies

not_a_bot_4sho•1h ago
> froze beer and inserted it to get rapidly wasted

Wow. TIL...

Larrikin•16m ago
Don't treat an anecdote on the Internet like it actually happened. There have been people posting that they had friends of friends in college do this for twenty years. OP never did it but it definitely happened.

In this case it's high schoolers, half of whom most likely have no sexual experience but are fully willing to explore their anal cavity, having access to alcohol but not that much access.

They can get drunk off small amounts of alcohol, but it's such a small ration that they are freezing and destroying their limited amount of beer (which most high schoolers hate) to shove up their butts, to get drunk slightly faster? How much frozen beer can one butt fit? Is it really that much better than holding your nose and pounding it in front of your friends? Are high schoolers really going to parties with beer in their butts to maybe get a buzz of two beers from one butt beer because they only have access to one twelve pack, instead of just telling everyone how they are so wasted instead?

xnx•3h ago
> breathless

I see what you did there.

foxyv•2h ago
I know that rectal rehydration is a good method when sterile IV fluids are not available. Hopefully it's much safer than current ventilator or ECMO treatments.
imglorp•2h ago
Some reptiles too. Painted turtles can survive under winter ice for months with cloacal respiration to extend their hibernation.

https://www.pbs.org/newshour/science/the-secret-to-turtle-hi...

Electricniko•3h ago
Excuse me, I just gotta go unblock my airway.
Qem•3h ago
The proof of concept by sea cucumbers probably predate us by several hundred million years[1]. I wonder how .any more people could be saved from COVID with this deployed.

[1] https://en.wikipedia.org/wiki/Sea_cucumber

qyph•3h ago
I wonder if this could be used for doping in aerobic sports? Could this elevate overall oxygen intake in a healthy person?

My vague understanding is that oxygen intake is a big limiting factor in aerobic activities hence measurement of things like vo2max in sports science. ‘Blood doping’ has similar benefits though it’s also about having more blood period.

It seems unlikely that one could take a big enough suppository to help in a meaningful way in a marathon, but in a middle distance race lasting only a few minutes…

semicolon_storm•3h ago
It seems unlikely, athletes are consuming liters of oxygen per minute. Plus, the impact is at least partially offset by needing to carry the extra weight with you.

Different story for apnea sports like freediving where a little bit of extra oxygen goes a long way.

o11c•3h ago
A liter of liquid is a lot more than a liter of gas ...
Liftyee•2h ago
Isn't liquid oxygen cryogenic (boils at -183C)? The engineering of keeping that ...there... gets interesting fast, especially when dealing with all the cold (absorbed heat from expanding gas) and containing the pressure while also releasing oxygen slowly.
o11c•2h ago
Um yeah don't use liquid oxygen.

But oxygen dissolved or otherwise absorbed in a material is fair game. Even without anything fancy, water can contain about 1% free oxygen, which is 8x what you could do with gaseous oxygen (which is in turn 5x what atmospheric mixture has).

And there are a lot of chemical reactions that can produce oxygen much better than 1%. The trick is going to be avoiding heat changes.

jcgrillo•1h ago
> Um yeah don't use liquid oxygen.

You could probably do it once..

hobs•1h ago
There's a lot of water so as long as my anal cooling fins project into the cooling fluid it sounds like I'll be down there for hours.
estimator7292•1h ago
The oxygen gas is dissolved into a different liquid, some kind of perfluorate in this case. You can put more oxygen molecules in a given volume when dissolved in a liquid than if you just compress the gas.
whycome•33m ago
Watch the abyss. The mouse!
stevenwoo•3h ago
In a trained person, the limiting factor as I understand it is the capacity of one’s blood cells to carry oxygen to the muscles. This method does not make more blood cells unlike the common doping methods used for aerobic sports like blood doping, artificial EPO.
0cf8612b2e1e•2h ago
Cyclists have been doping by taking transfusions of their own, previously donated blood. The extra blood cells can then carry more oxygen than a non-treated human.
colechristensen•1h ago
The surface area of your lungs is like a tennis court, there is a significant difference.

This is being talked about in the ballpark of partial assistance during severe respiratory failure so more like delaying organ damage during a crisis than boosting peak athletic performance.

qlm•3h ago
If this was enough to temporarily replace breathing I wonder how that would feel if you were otherwise healthy. I imagine not breathing would instinctively feel quite strange and even distressing.
hifikuno•3h ago
From the littlei know from a breath holding workshop I did awhile ago (for trying to get into freediving) it's the carbon dioxide build up in our blood that gives us the urge to breath, and not the lack of oxygen. If this method allowed for the removal of carbon dioxide from the blood then holding your breath might not even be discomforting.

Edit: goodells explained it better!

not_a_bot_4sho•1h ago
I'm scuba certified.

Now I'm wondering if I should get certified to dive with an anal rebreather too.

goodells•3h ago
It would be quite distressing because of the accumulation of CO2 in the blood, even with completely adequate oxygenation delivered intrarectally. The slight change in acid-base balance is what makes a person feel the need to breathe, and CO2 is an acidic byproduct of metabolism. This is why people with metabolic acidosis (e.g. in diabetic ketoacidosis or sepsis) have an increased respiratory rate.
next_xibalba•3h ago
"We were promised flying cars, instead we got butt breathing."
fragmede•3h ago
I dunno, if this means we can swim underwater and live in undersea cities, I'd consider it an okay tradeoff!
sentrysapper•3h ago
>Yes, they gave the animals enemas.

I am relieved for them.

diogenescynic•3h ago
"Are you a nose or mouth breather?"

"...I'm a butt breather."

Fix sleep apnea with this one weird trick!

Why are new CPAP machines so uncomfortable?

eth0up•24m ago
I think we can now finally spell it as we've always been tempted to. Continuous R.. A.. P
polishdude20•3h ago
I wonder if, given that our intestines can absorb gasses into our blood stream, if that also means we readily absorb our farts into our blood stream as well? The chemical composition of them could be having effects on your whole system maybe?
freediver•3h ago
The answer is probably yes and they eventually get exhaled through the lungs or metabolized by various tissues. Gives whole new meaning to 'carrying the fart' though.
russdill•2h ago
https://www.healthline.com/health/fart-in-mouth
hn_throwaway_99•2h ago
Worth the risky click, that was surprisingly informative.
thornton•2h ago
Agreed!
grim_io•3h ago
To think I've been doing breathing wrong all these years...
outoftheb0x•2h ago
that means we can now smoke two cigarettes at once?
Aspos•2h ago
So "blowing smoke up one's arse" isn't a completely baseless resuscitation technique after all.
NoPicklez•1h ago
Haha I said the same
smcnally•2h ago
> The technical term is enteral ventilation via anus (EVA).

Anecdatally, I have encountered multiple people with congenital capabilities re enteral locution via anus.

Wishfully, training astronauts for enteral ventilation via anus during extravehicular activities that involve writing an ongoing Prince song would be called “EVA EVA 4EVA.”

plantsbeans•2h ago
https://www.cell.com/med/abstract/S2666-6340(25)00314-9

DOI: 10.1016/j.medj.2025.100887

philsnow•2h ago
> it did provide a handy plot point for the 1989 film The Abyss, in which a rat is able to “breathe” in a similar liquid

Yes.. a rat..

(The statute of spoiler limitations is definitely over, so rather than being coy I'll say that a person undergoes the same procedure, under duress, in an particularly dramatic scene. It's a great movie but I fear its effects won't feel like they've held up well for anybody watching it for the first time.)

fainpul•2h ago
> ...they gave the animals enemas. They then induced respiratory failure...

Wow, so cool! And the results are such valuable science!

/s

carlosjobim•1h ago
Oxygenated blood should instead be directly injected into the main artery while deoxygenated blood is sucked out of the main vein and into a scrubber and rebreather apparatus for oxygenation.

Much better in every way.

NoPicklez•1h ago
So blowing smoke up someone's xxxx is actually beneficial
flakes•1h ago
Another great post from Arse Technica
AnonC•1h ago
The answer to the most important question is at the end of the article. They demonstrated that this is safe, not that it’s effective.

> “This is the first human data and the results are limited solely to demonstrating the safety of the procedure and not its effectiveness,” said co-author Takanori Takebe of Cincinnati Children’s Hospital and the University of Osaka in Japan. “But now that we have established tolerance, the next step will be to evaluate how effective the process is for delivering oxygen to the bloodstream.”

If it’s proven to be effective and can help avoid ventilators for (at least some) people, it would be a huge breakthrough and improvement in the quality of life for the patient and for their close ones.

stogot•1h ago
It’s unclear how they cycle the oxygenated fluid and … cycle the fecal matter that is likely to occur
silisili•55m ago
Interesting. Perhaps related? The Ohio river(and probably others) used to have smoke enemas at points for drowning victims. I'm told it's where the phrase 'blowing smoke up your ass' comes from, as people eventually thought it was snake oil/foolish.

So this is about oxygen delivery specifically, but I can't help but wonder if whoever came up with the old idea was onto something...

s1artibartfast•45m ago
In the 18th century the Royal Humane Society also put rectal bellows along the banks of the Thames in London for the benefit of the drowned.