ChaoticNeutralCzech
@ChaoticNeutralCzech@feddit.org
- Comment on Today's Entry 15 hours ago:
Probably not a DIP chip
- Comment on Gehheie88f3nj3-i-odk3j4y8-fff-jej 2 days ago:
To be fair, we don’t have any pics of exoplanets. Technically, we could measure their surface temperature and basic chemistry through spectroscoopy but I don’t think they reflect enough photons for our equipment. They are usually identified by dimming their star slightly when passing in front of it. This can give an estimated size and distance from their star. And maybe atmosphere composition if it refracts! So they’re not naming this kind of picture but a bunch of data with big error bars.
- Comment on Playback speed past X2 is now a YouTube paid feature 3 days ago:
My phone can’t decode YouTube’s WebM above 90 fps at 480p and 60 fps at 720p without a huge framedrop. The audio works fine though.
- Comment on Poor Jeremy 3 days ago:
Danke, dass du mich zum 39c3 geleitet hast
- Comment on Poor Jeremy 4 days ago:
Auch bei legendären Beiträgern wie ZonenRanslite lese ich zuerst den Inhalt
- Comment on Please, my son... He's sick... 4 days ago:
Germans call it Ameise (ant), Czechs call it ještěrka (lizard)… Any other languages with animal names for these?
- Comment on If the color of the Sun was orange, wouldn't the clouds and everything white also be orange? My friend is adamant that 30 years ago the "real" Sun was orange but got replaced with a white LED. 4 days ago:
You’re still being reductive. An indicator LED can work without any part of it more than 10 °C above ambient temperature. No incandescent light bulb can achieve this.
And yes, there are indeed lighting systems that use many low-power LED chips spread over a large area, none of which get hot even by human standards. These cost a lot of money but last extremely long.
- Comment on If the color of the Sun was orange, wouldn't the clouds and everything white also be orange? My friend is adamant that 30 years ago the "real" Sun was orange but got replaced with a white LED. 5 days ago:
Power density of the Sun is approximately 276.5 W/m³. That’s counterintuitively little. A classic LED 3mm plastic package has the volume of less than 40 mm³ and some white ones can handle about 100 mW without a heatsink. Even leaving space for connections and airflow, you can easily overpower the Sun by volume by orders of magnitude.
A fun article mentioning that 276.5 W/m³ is about a reptile’s metabolism (and they famously produce little body heat): what-if.xkcd.com/148/
On replacing the Sun with another light source: what-if.xkcd.com/151/
Basically, as this Stack Exchange discussion correctly states, human intuition is quite useless when thinking about things orders of magnitude outside our experience.
Meanwhile, you say “hot” because that’s what your finger felt. Not really convincing of your ability to think in cosmic proportions.
- Comment on If the color of the Sun was orange, wouldn't the clouds and everything white also be orange? My friend is adamant that 30 years ago the "real" Sun was orange but got replaced with a white LED. 5 days ago:
I’m trying to get you to stop reducing temperature scale to “anything over 60 °C is hot” because it’s not useful: a clearer distinction should be made between something that regularly causes house fires and something I unscrew while it’s on to put under my blanket when my toes are cold. Human perception of temperature (classic 0-100 °F) just does not allow comparing things an order of magnitude higher (in Kelvin ofc). There’s also more to heat, its effects and how it’s perceived than a single measurement of temperature: thermal mass, conductivity, color (exchange via radiation differs between black and white bodies) etc.
Also, it’s indeed ad hominem but you did choose the username yourself.
- Comment on If the color of the Sun was orange, wouldn't the clouds and everything white also be orange? My friend is adamant that 30 years ago the "real" Sun was orange but got replaced with a white LED. 5 days ago:
Username checks out
- Comment on Denominator, go Mercator 5 days ago:
Instructions nuclear
- Comment on Denominator, go Mercator 5 days ago:
Equal area projections usually preserve straight and perpendicular meridians and parallels. That’s neutral but then there’s the political decision of what latitude gets the correct aspect ratio. And Gall-Peters is not anti-colonialist if representing Africa correctly was your goal.
- Comment on Denominator, go Mercator 5 days ago:
Tbh any discussion of Mercator is ragebait enough. (There’s no better choice for slippy maps btw)
- Comment on If the color of the Sun was orange, wouldn't the clouds and everything white also be orange? My friend is adamant that 30 years ago the "real" Sun was orange but got replaced with a white LED. 5 days ago:
Boiling hot, as opposed to *METAL-MELTING BLAZING INFERNO
- Comment on Denominator, go Mercator 5 days ago:
TL;DR Somebody made an awful mistake rendering this map.
It’t not exactly the European portion but most of its recognizable parts (Kola peninsula, Caucascus…) because of the horrible SVG compression that deleted vertices presumably by count rather than keeping the most significant* ones. Just look how the Mercator/shrunk versions differ from each other and from an actually good map!
* A simple illustration would be Colorado, originally defined as a (Mercator) rectangle (between meridians and parallels) but ending up a 697-sided polygon (still way fewer than most surveyed administrative areas that size) largely because of surveying errors. However, if you pick the 1ˢᵗ, 175ᵗʰ, 349ᵗʰ and 523ʳᵈ vertex, you don’t approximate the shape nearly as well as by picking the 4 corners of the defining rectangle.
Image
And because corners are always mostly convex (they have to be because turns add up to 360° for closed areas), this compression will remove area more frequently than add it. This makes the map quite disingenuous (maybe not intentionally), as it amplifies the effect OOP was trying to show.
If I were a full-time Lemmy commenter, I’d download the Colorado polygon from OSM, import sone geo-libraries into Python and do all 174** combinations of picking the 1ˢᵗ, 175ᵗʰ, 349ᵗʰ and 523ʳᵈ vertex, visualize each quadrilateral as a video frame and** Technically 697 options because 697 is not divisible by 4. But only ¼ of them are fully distinct, as every consecutive 4 maps have an identical starting vertex and just differ in which pair of vertices is 175 apart as opposed to the normal 174.
- Comment on Poor Jeremy 5 days ago:
I’d say "this could cause speciation. There is an astronomically slim chance of it occuring naturally if enough sinistral (lefty) snails meet and create a sustaining population (and also not die out through inbreeding). I don’t think there is a case of any chirally divided species. Maybe this once happened with Amphidromus inversus but presumably, the species have mutated since to be able to successfully mate both homo- and heterochirally. Now, a balanced population exists and hetero mating is more common.
However, as humans come into the picture and can find mirrored snails and purposefully put them together, and breed them in safety into a large population, speciation can indeed happen and the resulting mirrored snail can fulfil the same environmental niches as the original species while having an almost completely separate gene pool (only the mirror mutants of each species can cross-breed - and if my above theory is correct, the advantages of tapping into a new gene pool may have then how dextral/sinistral then-subspecies of Amphidromus inversus eventually acquired unique breedability).
- Comment on Poor Jeremy 5 days ago:
True but people’s votes are the judicial branch that interprets the rules. They can choose to make another community when the dictator makes bad executive or legislative decisions (see !196@lemmy.blahaj.zone vs !onehundredninetysix@lemmy.blahaj.zone). As I said, you’re free to create a rival community and if your views prevail, it can get big (especially if !sciencememes@mander.xyz ever suffers a crisis like having to change instances).
- Comment on Poor Jeremy 5 days ago:
That’s how democracy works. If there’s enough offended purists like you, go create c/truesciencememes
- Comment on Poor Jeremy 5 days ago:
It has a 99% upvote ratio. Granted, not everyone votes based on community fit but still, the crowd decided it belongs
- Comment on Poor Jeremy 5 days ago:
Science because it’s a rare biological condition, called sinistral (as opposed to dextral) chirality.
Meme because it’s a funny and relatable thing on the internet.
- Comment on Poor Jeremy 5 days ago:
Not having to worry about gender/sexuality (except asexuality I guess) in your dating pool and still failing
- Comment on Real and True 5 days ago:
Also, train dispatchers, power grid managers etc. Infrastructure control of any sort.
- Comment on If the color of the Sun was orange, wouldn't the clouds and everything white also be orange? My friend is adamant that 30 years ago the "real" Sun was orange but got replaced with a white LED. 5 days ago:
From a human’s standpoint, we say they’re “hot”. The fact that humans can’t handle 150 °C nor 2700 °C does not mean there’s no difference between the temperature of a sausage fresh off the grill and magma. (Yes, by the time it gets to the surface, lava is too cold)
- Comment on If the color of the Sun was orange, wouldn't the clouds and everything white also be orange? My friend is adamant that 30 years ago the "real" Sun was orange but got replaced with a white LED. 6 days ago:
LED chips can’t get above 150 °C or they fail. So high-power LED lights need appropriate cooling. And the heatsink is big and thermally conductive, making it feel hotter to the touch than it is (it delivers more heat to you finger over time). Meanwhile, the glass of some bulbs can exceed 300 °C but cools down to safe levels in a minute (or less if xou touch it with something) because it’s thin.
Also, 150 °C (420 K) objects do radiate heat as black-body radiation but not that much, also it’s far-IR so only detectable with thermal cameras. Meanwhile, a light bulb’s filament is 2700 K (3000 K in halogen ones) and the Sun’s surface is 6000 K, and both produce copious amounts of near-IR light that largely contributes to the heat felt on one’s skin when illuminated.
- Comment on shut the hell up 1 week ago:
They at least take care that their website is up-to-date and not a 502: Bad Gateway page, right?
- Comment on shut the hell up 1 week ago:
And get you arrested, screaming “I wasn’t trying to steal cash from the self-checkout machine, just rip its speaker wires!”
- Comment on shut the hell up 1 week ago:
I don’t want them in my case,
I don’t want then on my mouse.(Reference to Ted Cruz’s awful poetry)
- Comment on shut the hell up 1 week ago:
The new “AI” of one of Czech providers is super annoying.
“Thank you for calling. To make sure it’s you, use your keypad to enter your numerical password.”
“You entered 123456 [they say it way too quickly but OK, I have a feature phone so no butter finger errors]. Is that correct?”
(At this point, you cannot proceed until you say “Yes”. Typing the number again (or anything else) will not help, you’d just hear “We couldn’t hear that. Can you try again? To make sure it’s you, use your keypad to enter your numerical password.”)
“Yes”
“Thank you for verification. Please tell us what your problem is-”
“Human”
“We couldn’t hear that. Can you try again?”
“Human”
“Are you sure you want to talk with our operator? The average wait time is 5 minutes.”
“Yes”
(2 minutes of awful music and nagging to press 1 to reconnect to the bot)
“I have a question about your ToS since your website is down. Also, I don’t ever want to speak to the bot again, can you bring the USSD text service or voice keypad menu back?”
- Comment on 1 week ago:
McClintock did her Nobel-winning work in her 40s, and it went unappreciated for 30 years because nobody believed her. An inspiring story for sure, but not one of an elderly woman discovering new biology.
- Comment on ai generated logo 1 week ago:
It’s not regulaar at all. It features a lot of different things and AI. Also, the fugly scaling dialog remains but the scaling is no longer nearest-neighbor.
