i think that it’s important to reserve enough space to streets. not to build lanes, but to build cafes and seating banks and trees there. it’s a typical problem of cities that they figure out that there’s not enough space to build trees, bike lanes, etc. after the houses are built. better reserve space first.
this isn't really a showerthought but more of a general opinion, but i'll post it here anyways because i don't know where else to post it. (pls tell me if there's a better community to post it to instead)
The Thermoelectric effect (TE) comes in two variants:
The Seebeck effect makes it possible to turn a heat flow (based on a temperature difference) into electric power.
The peltier effect does the reverse: it turns an electric current into a temperature difference across the two sides of the device.
The fundamental mechanism is a p-n-transition. So you have two different semiconducting materials, which means that the electrons are on different energy levels on both sides. When the electrons move from one side to the other, they have to absorb energy from the environment to get on the higher energy level themselves (p->n transition), or they give off energy (n->p transition), thus cooling or heating the environment.
With this technology, it is possible to build solid-state heat pumps that generate a temperature difference from an electric current with no moving parts!
(i don't know about efficiency or cost)
it would be good to have a simple tool to view activitypub content. like user profiles, posts, etc.
this is because there are sometimes federation issues (posts show up on one instance, but not on the other). it would be good to have a better understanding of what is happening there, maybe by having a simple tool to see what is actually being transmitted over the AP protocol. like, if i open my own user profile from mastodon, it only shows me about half the posts that i actually make. why is that? it would be good to see whether the data is actually correctly sent from the lemmy server, or if it's just wrongly interpreted on the mastodon side of things.
maybe something like activitypub-read "https://feddit.org/u/gandalf_der_12te" and it shows you something like that:
apparently this was an actual recipe from the ww2 time? at least it's mentioned in this video. watch it btw, it's hilarious. it's about why it's basically impractical to recycle plastic.
The report finds that data centers consumed about 4.4% of total U.S. electricity in 2023 and are expected to consume approximately 6.7 to 12% of total U.S. electricity by 2028. The report indicates that total data center electricity usage climbed from 58 TWh in 2014 to 176 TWh in 2023 and estimates an increase between 325 to 580 TWh by 2028.
I see a lot of people arguing about datacenters and their resource consumption. So i think it is good to have actual numbers on how much resources are being consumed. This post only includes energy consumption because i'm too lazy to look up water consumption.
Rubber duck debugging (or rubberducking) is a debugging technique in software engineering, wherein a programmer explains their code, step by step, in natural language—either aloud or in writing—to reveal mistakes and misunderstandings.
(you're the duck)
i'm often posting things here that i'm thinking about, and it turns out to actually help me understand the thing better that i'm talking about, just because i know that others will read it and maybe comment sth; it makes me think "what will others maybe comment to this?" and this itself often already leads to new insights :)
Auf seite 958 wird erklärt, was mit "Suffizienz" bei Gebäuden gemeint ist: Es geht darum, Gebäude nicht leerstehen zu lassen. Und um so Dinge wie "steck 2 Familien in 1 Haus dann hast du weniger Oberfläche" (Mehrfamilienhäuser).
Jedenfalls haben die "Verbesserung des Gebäudebestands" und "Neue Gebäude mit hoher Energieeffizienz" sehr hohe CO2-Vermeidungskosten in €/t. Und das ist eben das, worin es im Gebäudeenergiegesetzes geht, das jetzt teilweise durch das Gebäudemodernisierungsgesetz aufgehoben wird.
over the years i have noticed that it is very difficult to find public events and third spaces in my city (vienna). it seems plausible and obvious to me that there should be easily-accessible public lists (calendars) about which places i could visit and what events i could go to. yet, such lists do not exist, or if they do they are rather small.
analogously, the fediverse / small internet suffers from a very similar problem. there are a lot of very small but very nice websites out there, and a lot of small communities on the fediverse that you would like to know about, but you will never know them because there's no way to find them. what is the likelihood of accidentally stumbling upon the ![email protected] community if it isn't accidentally popular enough to appear in the "All" feed? Basically zero. Yet i'm glad i found it (somehow through extreme accident and luck).
What i'm saying is, we need more links to new places. We should make sure that there's a whole lot of ways to find new content, because it's simply linked to from other places. The same applies in real life: we need better content discoverability. This means, we need to tell other people about cool places that we know about and that could interest them too. For example, if i visit place A in my city, i tell the people about place B that i also visit often, so they have a chance to hear about it and maybe get in contact with new opportunities. Please consider doing this for your environment too, maybe this even gives you a new chance to talk about stuff with people that you have just met. In case you don't know how to start a discussion, tell them about "hey i came to know this place through person X, which i also met at place B. do you know it?". This can make you find physical context for your own life.
The Domesday Book is a land survey book from 1086, trying to record every shire in England.
The Anglo-Saxon Chronicle states that in 1085 the king sent his agents to survey every shire in England, to list his holdings and dues owed to him.
The survey's main purpose was to record the annual value of every piece of landed property to its lord, and the resources in land, labour force, and livestock from which the value derived.
The name "Domesday Book" [the Middle English spelling of "Doomsday Book"] came into use in the 12th century. Richard FitzNeal wrote in the Dialogus de Scaccario (c. 1179) that the book was so called because its decisions were unalterable, like those of the Last Judgment, and its sentence could not be quashed.
does anybody know whether directly linking to inv.nadeko.net site is illegal as piracy? because it provides a service that would otherwise be provided by youtube
diese sticker hier habe ich gerade auf druck.de bestellt, sollten in 2 wochen ankommen. hoffentlich erleben wir irgendwann wieder so eine blütezeit wie unter feddit.de
The idea of a body so massive that even light could not escape was first proposed in the late 18th century by English astronomer and clergyman John Michell and independently by French scientist Pierre-Simon Laplace. Both scholars proposed very large stars in contrast to the modern concept of an extremely dense object.
Michell's idea, in a short part of a letter published in 1784,[6] calculated that a star with the same density but 500 times the radius of the sun would not let any emitted light escape; the surface escape velocity would exceed the speed of light.
what's funny is that he even got the radius (schwarzschild-radius) right. just plug in c for the escape velocity and you get the schwarzschild-radius.
