DigitalMus @ DigitalMus @feddit.dk

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2 yr. ago

Nu er det ikke fordi jeg har lyst til at skyde ned på positive nyheder, da vi ikke har nok af det i forvejen. Men for at have et lidt mere nuanceret billede, så er det godt at vide at der også er studier der tyder på at disse "super centenarians" er korreleret med fattigdom og kort gennemsnitlig levealder, og det store antal af ældre muligvis skyldes alders- og pensions bedrag. https://www.biorxiv.org/content/10.1101/704080v3.full

Why not both?

You need to know which basis the sender use to collapse and measure in the same basis. Then you need to sample a statistical distribution and the desired information will be the average of the distribution. This is very well proven in the Bells inequality experiment and can definitely be used to gain information.

It is clearly not very efficient in the sense a lot of transported bits are wasted to convey less information. But the advantages of instantaneous and secure communication will be worth it in some use cases.

That is, of course, if the engineering issues such as quantum repeaters (a sort of range extender) and high fidelity storage are properly solved. It is a few years ago since I did any quantum information in uni, so I don't know what the current state of things are.

For using the quantum teleportation algorithm you first have two establish entangled qubit pair, with one photon at the sender and one at the destination. This process does take the distance over speed of light amount of time. The trick is that you would pre-process this, and decide later when to and what information to encode into the qubit, allowing for "instant" information transfer. Naturally, this requires that you have a very good memory device that keeps the fidelity of the entangled qubits.

Not a search engine, but last week I learned of the European Open Websearch project, which builds a new free and open search index. It should already be ready to try out. Hopefully we will see some search engines implementing this soon.

From the Danish media: https://nyheder.tv2.dk/business/2025-03-14-usa-beder-danmark-om-hjaelp

There are a few additional points

• Multiple European countries have gotten similar requests, not just Denmark
• American egg policy requires washing the eggs while European policy prohibits this, making it highly inconvenient.
• They would want assurance that America won't suddenly put tariffs on the eggs.
• If america were to pay upwards of 1€ per egg, maybe they'd have a deal.

Thought I would mention Guix. I don't know about using it as an OS but just the package manager is so nice to build reproducible software environments (although disclaimer I discovered this myself a few weeks ago). At least as close you can get without including proprietary hardware drivers. Building MPI applications on my laptop and moving them to an HPC cluster with full performance feels like magic.

Cool, can I come over and have a look at your super strong monster magnet Neutron star?

I quite like .ion or .iot

The sun's spectrum at the earth surface peaks in the green color range, which should make green the most efficient choice. Although, I wonder why they have to absorb only a single or a narrow band of color.

Without knowing much about psychology, I would imagine separating the mindset into a set of orthogonal axis is pretty difficult and certainly the normal range would probably not follow a normal distribution in each axis. As a result the N-dimensional volume would not be a N-sphere but some complex topological shape. Possibly even consisting of multiple disjointed sets. If any of these assumptions are true then the global point average over the entire space may lie outside many of the "normal" ranges.

Det er en god pointe. Men jeg tænker også det er muligt at kombinere mit forslag med et typisk grundforløb. F.eks. Kunne man lave en ny merit evaluering på gymnasiet, (en prøve eller karaktergennemsnit etc.) som ville i kombination med folkeskolens data ville give dig adgang til bestemte A-fag eller linjer.

Det er måske ikke en køn løsning, men jeg føler at hvis vi skal lave fast merit baseret frasortering, kan vi lige så godt gøre det ordentligt i stedet for at bruge et halv-arbitrært tal bare fordi det er nemt.

Det er selvfølgelig også et spørgsmål om man vægter 'generalister' højere end 'specialister' når det kommer til det gymnasielle niveau.

Jeg har altid syntes at det overordnede karaktergennemsnit er et alt for rigidt et adgangskriterie. Det er jo et gennemsnit af gennemsnit der ikke siger meget om ens kompetencer. I stedet for kunne man kun tage udgangspunkt i de afsluttende karakterer som var relavant for den enkelte uddannelse. Ellers ender du med unge der ikke kommer på et teknisk gymnasie på grund af deres tysk og religion karakterer, og unge der ikke kommer ind på en sproglig almen gymnasie linje på grund af deres matematik og fysik og kemi karakterer.

Imagine there are two balls, a red and a blue. You want to communicate to your friend rolling the only blue ball to them. In a ferromagnet there are only blue balls, in an antiferromagnet the blue and red balls are glued together and in an altermagnet there are both balls but they go in different directions so you just need to orient yourself correctly.

The antiferromagnet can't be used for spintronics, the ferromagnet can but big magnetic field disturb other parts in a circuit.

Altermagnets are pretty interesting because their most defining feature is not the magnetic order in the materials. They look like ordinary antiferromagnets where the spins of adjacent atoms point in opposite direction and compensate each other, so no large magnetic fields are created. What differentiate altermagnets from antiferromagnets is how the electrons with different spin behave. When pulling current through altermagnets it will consist of purely spin up electrons along one crystal axis and purely spin down along orthogonal crystal axes. Thus the spin currents have a 'alternating' pattern, giving the name altermagnet. This is primarily exciting for the field of 'spintronics' which is all about creating technologies using spin currents.

Not all altermagnets are equally interesting, many antiferromagnets can be reclassified to altermagnets but they are generally insulating. (fun fact the first ever measured and textbook antiferromaget MnF2 is actually altermagnetic) So materials discovery of new altermagnets is important to find metallic, semi-metallic or even super conducting altermagnets.

I feel like I met some recursive endgame boss... I made a penguapplepenguinpenguapplepenguapplepenguin partially from pineapples and penguins and something else I spam combined

R

0.5% of eluveitie at 1443 minutes, I suppose not too impressive considering 907k monthly listeners. But I'm a varied listener

The article linked here is rubbish, CrSBr is not a meta material and also not a superconductor. It is a layered semiconductor. However, the Nature article they link to is quite interesting. The background is in cavity engineering, which is where one tries to modify intrinsic material properties by coupling to light "strongly". This is usually done by creating a cavity (think two opposing mirrors around the material) and have light bounce back and forth.

Here instead they don't need to use mirrors, but the refractive index is different enough to trap light in the material, and the electronic properties seem to be quite sensitive to the light because the magnetic phase is sensitive to magnetic fields and the different magnetic phases have quite different electronic properties. So all in all they find a strong light-matter coupling but only below 132K (the critical temperature of the magnetic phase).

Danish prices seem unchanged.