[-] [email protected] 72 points 2 years ago* (last edited 2 years ago)

Long-distance energy transfer without energy loss will make it possible to connect more energy grids and sources together, so stuff like the saharan desert providing solar power to Europe, for example, suddenly becomes feasible. Maglev trains will no longer require lots of power to run, since they could utilize superconductor magnetic levitation. You could make super-efficient processors that wouldn’t really heat up at all. Superconductors are also key to quantum computers, so expect lots of advancements in that field as well. They will also make it much easier to build and run fusion power experiments.

Lots of tech in general would benefit from this discovery, stuff like MRIs, electric vehicles, space telescopes or particle accelerators would become way more efficient, cheaper and easier to produce.

Edit: also, check out this video by Isaac Arthur for some more sci-fi examples of what this tech can be used for in the future (discussed in the second half). It’s more space-colonization-focused and kinda like a thought experiment, but interesting nonetheless.

[-] [email protected] 137 points 2 years ago* (last edited 2 years ago)

Reposting my comment from another thread to add a bit of context in case anyone’s curious.

So I read the paper, and here’s a tldr about how their material apparently gains its properties.

It is hypothesized that superconductivity properties emerge from very specific strains induced in the material. Hence why most of the discovered superconductors require either to be cooled down to very low temperatures, or to be under high pressures. Both shrink the material.

What this paper claims is that they have achieved a similar effect chemically by replacing some lead ions with copper ions, which are a bit smaller (87 pm for Cu vs 133 pm for Pb). This shrinks the material by 0.48%, and that added strain induces superconductivity. This is why it apparently works at room temperature — you no longer need high pressures or extreme cold to create the needed deformation.

Can’t really comment on how actually feasible or long-lasting this effect is, but it looks surprisingly promising. At least as a starting point for future experiments. Can’t wait for other labs’ reproduction attempts. If it turns out to be true, this is an extremely important and world-changing discovery.

Fingers crossed :)

[-] [email protected] 83 points 2 years ago

No one is going to post news/articles here and then discuss them as they would in a regular post. It won’t get bumped up on the subscribed page if something interesting happens. Most of the comments here are going be about the megathread itself.

So this is effectively banning all the discussion concerning all of his companies. Which might be something you want to do, every community can decide for itself what kind of stuff they want to forbid after all. But I feel like it should be said directly, not via making a catch-all megathread.

[-] [email protected] 68 points 2 years ago

Publications like these lower reddit’s future valuations though. I’m not sure whether a two-day uptick in users is worth that. My guess would be that it’s not.

[-] [email protected] 70 points 2 years ago* (last edited 2 years ago)

I know, right? It’s so weird. In every single instance of some bullshit happening it’s easy to brush it off as incompetence or an attempt at profit maximization, but overall it feels a lot like some kind of targeted disassembly of whatever made the internet great and facilitated open discussions.

[-] [email protected] 73 points 2 years ago* (last edited 2 years ago)
[-] [email protected] 57 points 2 years ago

To save you a click, they used new material combination, thin films of hafnium oxide connected by barium bridges, to create a memory storage device that can encode states in between 0 and 1 to increase possible information density.

Also, the horizon line on their logo looked like a hair on my phone screen and it bugged me the whole time I was reading the article. I accidentally clicked on it trying to swipe it off the first time.

[-] [email protected] 105 points 2 years ago

Reposting my comment from another similar thread ‘cause I think it’s kind of important to add.

Ok, so it doesn’t mention wet bulb temperature anywhere, so I went to figure it out. The first thing I was surprised with is apparently most of online calculators don’t take in values higher than 50C.

I couldn’t find the exact data about humidity for that day, but it has been 35-40%+ at a minimum for most days in that region, sometimes even reaching 90%.

So, 52C at around 40% humidity is 37.5C in wet bulb temp. The point of survivability is around 35, and most humans should be able to withstand 37.5 for several hours, but it’s much worse for sick or elderly. 39 is often a death sentence even for healthy humans after just two hours — your body can no longer lose heat and you bake from the inside. That’s like having an unstoppable runaway fever. And with that humidity it’s reached at 54C.

We’re dangerously close to that.

[-] [email protected] 55 points 2 years ago

Ok, so it doesn’t mention wet bulb temperature anywhere, so I went to figure it out. The first thing I was surprised with is apparently most of online calculators don’t take in values higher than 50C.

I couldn’t find the exact data about humidity for that day, but it has been 35-40%+ at a minimum for most days in that region, sometimes even reaching 90%.

So, 52C at around 40% humidity is 37.5C in wet bulb temp. The point of survivability is around 35, and most humans should be able to withstand 37.5 for several hours, but it’s much worse for sick or elderly. 39 is often a death sentence even for healthy humans after just two hours — your body can no longer lose heat and you bake from the inside. That’s like having an unstoppable runaway fever. And with that humidity it’s reached at 54C.

We’re dangerously close to that.

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submitted 2 years ago by [email protected] to c/[email protected]

And I assure you, it definitely fits the community

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submitted 2 years ago by [email protected] to c/[email protected]
[-] [email protected] 78 points 2 years ago* (last edited 2 years ago)

Why imgur though, why not link directly to xkcd?

[-] [email protected] 48 points 2 years ago* (last edited 2 years ago)

Will not completely go extinct is not the same as fine. Even ignoring climate refugees and all that, let’s look at a simple thing: food supply.

The mathematics of global famine are quite simple. Add all the calories that earth produces in one day on average and divide it by 1500. That’s the amount of people that can exist.

Now, like 70% off all calories come from just 3 crops: rice, corn and wheat. As a good approximation, all of those lose about 10% harvest yield for each 1 degree C in temperature rise. It’s not really linear and is better at the beginning (so like 5% for the first degree), and much worse further on. But in general the approximation works.

Humanity now produces about 1.5x of the food supply we need, and even with super-optimized logistics we’re not going to get it lower than 1.2–1.3x population, since a lot of food gets wasted by cafes/restaurants and people themselves. Some just gets bad because it’s not consumed in time or takes too long to deliver or sell.

And with the current temperature rise estimations we’re looking at losing caloric supply for about 20% of the entire population in the next 20 or so years.

And that’s just one example. Have you seen rivers of dead fish in Australia and the states? For each species there is a point when the water gets too hot to hold enough oxygen or to cool down their bodies, and then bam — the whole species dies in a day. Right now, some algae, corals and plankton are like 1.5 degrees away from mass death.

It’s not really that “fine”.

Sorry for the rant.

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submitted 2 years ago* (last edited 2 years ago) by [email protected] to c/[email protected]

The community is located on kbin. In case you don’t see any posts, no one from your instance has yet subscribed to the community. Subscribe and you’ll see new posts going forward. There are several threads there right now.

Links galore (hopefully at least one works):

!jewelrydesign | !jewelrydesign

!jewelrydesign | [email protected]

Full web link

/c/JewelryDesign

@JewelryDesign

Local lemmy.world link

Or just paste this into search: [email protected]

[-] [email protected] 127 points 2 years ago

The concept of emergence blows my mind.

We have this property in our universe where simple things with simple rules can create infinitely complex things and behaviours. A molecule of water can’t be wet, but water can. A single ant can’t really do anything by himself, but a colony with simple pheromone exchange mechanisms can assign jobs, regulate population, create huge anthills with vents, specialty rooms and highways.

Nothing within a cell is "alive", it’s just atoms and molecules, but the cell itself is. One cell cannot experience things, think, love, have hopes and dreams, or want to watch Netflix all day, but a human can.

The fact that lots of tiny useless things governed by really simple rules can create this complexity in this world is breathtakingly beautiful.

Kinda ties into your example :)

1683
submitted 2 years ago by [email protected] to c/[email protected]

A search for Threads content on Twitter currently brings up zero results, despite plenty of links to Meta’s microblogging rival being posted on the platform.

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submitted 2 years ago* (last edited 2 years ago) by [email protected] to c/[email protected]

Check out the pinned post for a general guide to the community that includes lots of relevant examples.

The community is located on kbin. In case you don’t see any posts, no one from your instance has yet subscribed to the community. Subscribe and you’ll see new posts going forward. There are a dozen threads there right now.

Links are a still somewhat a mess, but hopefully at least one should work:

!urbandetails | !urbandetails

Full web link

/c/UrbanDetails

@UrbanDetails

Local lemmy.world link

Or just paste this into search: [email protected]

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submitted 2 years ago* (last edited 2 years ago) by [email protected] to c/[email protected]

The community is located on kbin. In case you don’t see any posts, no one from your instance has yet subscribed to the community. Subscribe and you’ll see new posts going forward. There are several threads there atm.

Links are a bit weird, but at least one should work:

!IndustrialDesign | !IndustrialDesign

Full web link

/c/IndustrialDesign

@IndustrialDesign

Local lemmy.world link

Or just paste this into search: [email protected]

0
submitted 2 years ago by [email protected] to c/[email protected]

I heard that votes have been changed to behave closer to how people would expect, and boost is staying here as well. So I had an idea how to bring it all together in the interface.

Sidenote: you don't have to click the links here, the images are also posted inline in the comments below.

An app (either Artemis or an official one) might use a swipe gesture to visually hint at the relation between upvoting and boosting, as shown in the attached animation. Here's a static app mockup with both swipe levels displayed. I'd also imagine that there should be a setting that auto-upvotes posts when boosting.

And on the web, it's probably a good idea to consolidate all the voting buttons into a single block by adding an additional button at the top.

Edit: I’m disappointed in you guys. How come no one noticed the memes? :)

114
submitted 2 years ago* (last edited 2 years ago) by [email protected] to c/[email protected]
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submitted 2 years ago by [email protected] to c/[email protected]

Honestly, I’ve been really enjoying making these, probably the most I’ve been excited to model something for months. So I exchanged some sleep for a faster turnaround :) Previous post here

Upd: here are the links to images on transparent backgrounds for creators to use on their pages: purple and green Artemis, 3D modeling

Artemis: icon
Looking at their logo, I assumed the name was related to the hunting goddess, so this icon just had to be a quiver. It holds 7 arrows for good luck and is partially draped over to signify the app’s unfinished state, and as a nod to how the goddess herself is often depicted clothed in a flowing toga-type garment.
Cloth sim result from the back

And since the current icon uses the pride flag as its background, I figured Artemis would definitely wear a pride pin on her quiver. And besides the original color scheme I also stumbled upon a fun-looking natural colorway. Plus a similarly cosy purple version :)

Here’s the logo alone, btw. Sorry I changed it a bit, but those two thinner lines weren’t working that well for the quiver piece imo.
@hariette, what do you think?

Urban Details: icon
So this one took the most time. You have no idea how many different buildings and road arrangements I went through :)
Ghosted view of the final model

It’s meant for a community that I started which aims to celebrate various interesting details about cities, from tiny local Easter eggs to city-encompassing infrastructure projects. Just stuff that makes life either better or more fun.

The icon turned out to have some serious /fuckcars vibe, but I guess it fits well enough. I got a few interesting lighting setups while experimenting with the model, so I included a night scene as well.
High-res evening version

3D Modeling: icon
I made a quick icon for this community the last time, but had a better idea and had to try it out. I think it encompasses the topic way better than before.
@lavender, I summon thee to check out the updated icon :)

Want one?
Again, if you’re the owner of a kbin community and would like to have a similar icon, comment here to discuss it. I’m mostly making these during my free time on weekends, so I probably won't be able to make more than a couple pieces a week in the future.

I commented below to have some of the icons displayed inline, so that you don't have to click every link. Is that more convenient? Let me know if it clutters the comments and I should delete those.

0
submitted 2 years ago by [email protected] to c/[email protected]

So I 3D modelled two icons (well, illustrations rather) for the communities that I created on kbin: Industrial Design and Jewelry Design. These icons are meant to reimagine kbin’s logo in a way that's relevant to each community.

Btw, as a feature request, I think it might be cool to separate the banner on a magazine's page from the mini-icon that shows up in listings. Also, inline images should be a thing, I think.

Industrial Design: icon
This icon is just an assortment of various gizmos and whatchamacallits that seemed to fit the shape. It was modelled in Rhino and rendered in Keyshot. The model uses curvature continuity, just like any self-respecting grown-up model would.
Ghosted view, plaster view

Jewelry Design: icon
This icon is designed as a hypothetically producible piece of jewelry, except that the corners — those tiny semi-spheres that hold the gems — are a tiny bit larger than usual to accommodate the icon's scale. The piece has a partially open back — a common practice in jewelry design — to allow for more light to reach the gems. That makes them look prettier both in renders and irl.
Front view, back view

The model was created in Rhino and later welded and polished in ZBrush to make it appear closer to how it would look in real life.
zBrush smoothing

Want one?
Creating these was a lot of fun, so I'm open to making a few more. If you're the owner of a magazine and would like to have a similar icon, comment here to discuss it. I'll be creating these during my free time on weekends, so I probably won't be able to make more than a couple pieces a week though.

view more: next ›

fearout

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