10 ms·
What are these bumps on the top of a pull-tab can?
- dartos 2y agoOld Reddit vibes
- deleted 2y ago[deleted]
- whamlastxmas 2y agoYeah I started reading it prepared for it to be fake LLM slop
- datavirtue 2y agoThis. Reddit is loaded with social justice LLM bots.
- whamlastxmas 2y agoThe bigger problem is political astroturfing and karma farming
- datavirtue 2y agoWhich the LLMs have been tuned on.
- a_shovel 2y agoxkcd "Work": https://xkcd.com/1741/ https://xkcd.com/1741/ "Sometimes I get overwhelmed thinking about the amount of work that went into the ordinary objects around me."
- Larrikin 2y agoA former co-worker I knew said a technique he would use on a date that was going slow to try and make himself look smart and the date curious was to examine the design decisions of objects around them. The table, the paint used to make a painting, the shampoo that makes the dates hair smell so good, etc. Add in some history of the object and discuss until an interesting bit was found that could move the conversation else where. Seemed like it could work but I never needed to try it.
- daseiner1 2y agoI've never had a date going slow that also included me being able to smell her hair.
- NikkiA 2y agoThe fact that he got to try this routine multiple times tells me it probably didn't work. He also sounds unbearable.
- HPsquared 2y agoThen it's a jumping off point to talk about economics, perfect date material.
- gardenhedge 2y agoIt's probably fine for conversation but writing it down and using it as a tatic definitely makes it strange
- noneeeed 2y agoI love this comic. There's an idea in psychology called the illusion of explanitory depth. It's the idea that everyone has much more confidence in their understanding of how things work, even the most mundane and apparantly simple things, than is warranted. In turn we tend to hugely underestimate the difficulty, complexity and skill in jobs we have never done. The world is absolutely full of utterly prosaic objects that are far more sophisticated that we imagine, either in their function and design or in their manufacture. Most people overestimate how well they would cope in some post-apocalyptic world. But I think even many people who regard themselves as prepared, underestimate how much skill and sheer effort is involved in making really simple things like rope. To do more than just scrape by you would need to reconstruct a society of specialists, it won't be the rugged individualists.
- potato3732842 2y agoI hate this take (and every other take wherein one basically looks down their nose at the rest of the population and claims they all have a bad take on something). Most things are pretty simply and someone with a basic understanding could get them mostly right or at least right enough to work. The complexity comes from the many layers of refinement over the years. No, your clay molded toilet won't flush like a modern one but if you understand the basics of how a toilet works it'll probably flush.
- infecto 2y agoI believe you are overestimating the percentage of the population that understand the basics of how a toilet works. Not looking down on those folks but in my experience, there are folks that think about how things work or have some practical experience, the rest don't ever think about it and so most likely do not even understand the basics. Nothing wrong with it but its fairly apparent. Inversely, those folks that think about how things work tend to be fairly overconfident in their ability to recreate/repair/innovate. In reality there are often fine details that you miss.
- smitelli 2y agoIs this hypothetical person going to build a municipal water and sewer system for their toilet too? Or will they just dig a well, which requires no skills or effort at all? /s
- HPsquared 2y agoReminds me of "I, Pencil". https://en.m.wikisource.org/wiki/I,_Pencil https://en.m.wikisource.org/wiki/I,_Pencil
- helsinkiandrew 2y agoRelated: The Engineer Guy’s “The Ingenious Design of the Aluminum Beverage Can” on YouTube https://youtu.be/hUhisi2FBuw https://youtu.be/hUhisi2FBuw
- larusso 2y agoDamn you beat me by a hair
- boffinAudio 2y agoWhats crazy is that a significant portion of the aluminium minerals comes from a single source of bauxite in the world, near Pinjarra Western Australia .. something like 90% of the worlds aluminium is sourced from that one mine.
- atombender 2y agoAccording this source [1], only about 35% of all bauxite is mined in Australia, so I don't think that's true. What's crazy is how modern shipping has made it economical to process this elsewhere, all over the globe. For example, from one of the biggest bauxite mines, in Pará, Brazil, the raw bauxite is shipped across the Atlantic to be processed by Hydro in Norway, which refines it into alumina powder, which is then shipped elsewhere to be refined into aluminum. You would think it would be more cost-effective and energy-efficient to centralize this, not to mention more environmentally friendly. [1] https://www.nsenergybusiness.com/news/profiling-the-top-five-bauxite-producing-countries-in-the-world/ https://www.nsenergybusiness.com/news/profiling-the-top-five...
- boffinAudio 2y agoYeah, I think this factoid has changed significantly in the decades since I learned it during a visit to Pinjarra. ;) Still, bauxite is pretty weird business.
- cjs_ac 2y agoExtracting aluminium from bauxite is notoriously energy-intensive. During the nineteenth century, European aristocrats used aluminium tableware because it was more expensive than silverware. (They later switched back to silver when the novelty wore off and they realised aluminium was too light to feel right in the hand.)
- larusso 2y agoWhenever it’s about cans I can only recommend this video from the engineer guy [1]. He makes no videos anymore sadly. https://youtu.be/hUhisi2FBuw https://youtu.be/hUhisi2FBuw
- vlachen 2y agoI can highly recommend his books, however.
- larusso 2y agoI also think Technologie Connections filled his spot great. He started with sound and video topics but switched to household technologies.
- hobofan 2y ago> He makes no videos anymore sadly. Has he stated that anywhere? Because looking at the upload date (8 months) of the latest video and the gaps between previous uploads (sometimes multiple years), it doesn't look uncharacteristic for him.
- g00dis0n 2y agoI seem to remember in a video, perhaps about nappies, that he said due to him having a child himself he wouldn't be doing as many (any?). Can't remember.
- amyames 2y agothe pull tab on the right has a divot in it where it makes contact with the can, and it concentrates more pressure at the point of contact to pop the seal. That’s an attempt to mitigate cans where you’d pull the tab and the tab would just break off without opening the can. So the person who answered it’s usually because of the seal is right. other half’s dad [retired from] Campbell in Ohio and isn’t an internet let alone a Reddit person, you’d never guess how much trivia there is about their #2 can. I’d have commented but a brand new account will probably be buried as spam … and the second answer is correct anyway.
- juancb 2y agoI hope to someday be too good for Reddit. For now I tend to use it or at least click on links to it like I do for Twitter.
- Ferret7446 2y agoThat sounds... at least partially wrong? Pull tabs do not break the seal by pressing in to the can. They break the seal by pulling the lid up away from the can, where the "swivel" point is. The tab acts as a class two lever, where the "tip" of the tab is the fulcrum. https://en.wikipedia.org/wiki/Lever#Types_of_levers https://en.wikipedia.org/wiki/Lever#Types_of_levers
- runlevel1 2y agoReminds me of something from a few months ago: Someone on r/HomeNetworking cursed whoever invented the RJ45 connector, and in the comments, Richard Benett, vice-chair of the first IEEE 802.3 task group that wrote a standard around RJ-45-style connector, appears and offers to take the blame. That led to this short documentary: "TWISTED: The dramatic history of twisted-pair Ethernet" https://www.youtube.com/watch?v=f8PP5IHsL8Y https://www.youtube.com/watch?v=f8PP5IHsL8Y
- smokel 2y agoAnd here's a link to that particular Reddit post: https://www.reddit.com/r/HomeNetworking/comments/1dsfv5f/to_the_person_that_invented_rj45_connectors/ https://www.reddit.com/r/HomeNetworking/comments/1dsfv5f/to_...
- znpy 2y agolink to the old.reddit.com version for an actually readable page: https://old.reddit.com/r/HomeNetworking/comments/1dsfv5f/to_the_person_that_invented_rj45_connectors/ https://old.reddit.com/r/HomeNetworking/comments/1dsfv5f/to_...
- ReptileMan 2y agoWhen it comes to connectors in IT the RJ45 and RJ12 are among the saner ones.
- voxadam 2y agoOne of my favorite examples of odd connectors has to be the massively clunky hermaphroditic Token Ring connector from IBM. https://upload.wikimedia.org/wikipedia/commons/d/d1/IBM_hermaphroditic_connector.JPG https://upload.wikimedia.org/wikipedia/commons/d/d1/IBM_herm... https://upload.wikimedia.org/wikipedia/commons/1/1a/IBMtrconnector.jpg https://upload.wikimedia.org/wikipedia/commons/1/1a/IBMtrcon... https://imgur.com/found-old-ibm-cable-while-cleaning-up-warehouse-dTBr3Lu https://imgur.com/found-old-ibm-cable-while-cleaning-up-ware...
- Ferret7446 2y ago
- unwind 2y agoVery informative, like so many posts on the /r/whatisthisthing sub. It's awesome when random sources pop up, it's very rewarding! I had a similar moment once (I'm a regular reader of the sub) when someone asked about about a balise [1] when I was at one of the primary manufacturers and operators of them, doing work on software handling logs from passages. :) Also, of course whenever someone on here mentions Nagle's Algorithm [2] and gets fun feedback from a particular user, that's fun too! :) [1]: https://www.reddit.com/r/whatisthisthing/comments/yrijd9/what_is_this_rectangular_plate_on_subway_tracks/ https://www.reddit.com/r/whatisthisthing/comments/yrijd9/wha... [2]: https://en.wikipedia.org/wiki/Nagle%27s_algorithm https://en.wikipedia.org/wiki/Nagle%27s_algorithm
- dasil003 2y agoRemember when every other Quora answer felt like this? In retrospect maybe that was peak Web.
- imglorp 2y agoFurther down, paraphrasing a thread, > why is the dot spacing different on the left vs right can? > When a product design like this gets licensed out to others in the same industry, they will often change the design slightly to make their version incompatible with other potential suppliers > why want incompatibility? > to enforce supplier loyalty Another kind of moat. Everyone is for a free market until they can use some form of lock-in to force a transaction.
- cma 2y agoI can't imagine getting assigned this task and not getting depressed, "bullshit jobs" smacking you in the face
- ryandrake 2y agoI used to think the future would be like Star Trek, but in reality, the space ships and space stations won't be able to dock with each other because there will be 3-5 oligarchic manufacturers, and they will use 20 different docking standards in order to segment and lock in their customers. We're never going to have Nice Things because shareholders want another 0.5% back from their investment.
- thedman9052 2y agoI'd imagine something as important as docking would go more like USB-C adoption. There will be a standard, but a powerful holdout will insist on their proprietary solution because it's "safer" or something. Meanwhile everyone is shouting at them to just use the standard, until it's finally enforced by legislation. The difference is something like phone ports and docking are things which end users readily benefit from having interoperability, so it's a selling point and there's market pressure to conform. Factories are bespoke installations and they often run without major changes for many years at a time. There's less pressure for them to have interchangeability when they don't move and don't interact with each other.
- 2y ago
- johtso 2y agoIt's the pig's eyes of course!
- jonhohle 2y agoToo bad the post is locked. shout out to Menomonee Falls in the 90s!
- kazinator 2y agoLove the enthusiasm of the top answer! "Pop cans appeared in the 1990s; I was there and helped make it happen, bumps and all!"