user070223
user070223 on Hacker News
Posted by
user070223 on Thursday April 16, 2026 @02:34AM
from the youtube.com dept.
Teapot spout placed on the bottom where the pressure is highest.
The spout shape change from large opening to smaller one. it is curved like an S(and not U) shape(like a river band?) to "straighten" the water getting rid of eddys which can form after the first curve(which you have to have to pour).
The spout has a sharp tip which prevent the pot from dripping (ig nobel prize winner, teapot effect)
The tea is poured from a high distant to the cup(laminar) which cools the tea and causes the water to splash which traps sand(remember we are in the Sahara) by making a foam along with the green tea saponin molecules which have of it attracted to water and the other repelled.
The sugar makes the liquid viscous along the mints' essential oils which keeps the bubbles.
Posted by
user070223 on Monday April 13, 2026 @12:03PM
from the hackaday.com dept.
Check his YT channel has more videos
Another fun use for gum arabic is making watercolor paints, you can do it with your kids sourcing the pigment from different soils. pour water and let the heavy big particle fall to the bottom and source the small ones from the top and mix some ingredients
Github hogging cpu when js is turned off
Does any JIT/AOT/hot code optimization/techniques/compilers/runtime takes into account whether the branch prediction is saturated and try to recompile to go branchless
Her logic seems reasonable but stating that the fibers "return to their original crinkled state" is missing the fact that the fiber go through the process of spinning to improve tensile strength (as well as the options of making an infinite yarn from finite fibers by twisting them together). regardless to return to original "crinckled state" they need to overcome those forces as well as the forces of the geometry of the knit(on a different scale).
BTW Rayon is also made from cellulose, cellulose II. While Cellulose I(natural) is metastable it can be converted by disolving in lye to a stable form (beta-gllocouse molecolue chain goes from being parallel to being anti parllel which increases the # of hydrogen bonds as well as helping create a more stable 3d structure) which again improve tensile strength and resist wrinkles on a different scale.
Thought Emporium entire channel is a goldmine
Here's another youtuber journey to fix the lactose intolerance by just eating lactose(powdered milk)("prebiotic") which had strains of a bacteria("probiotic" which feasts on the prebiotic) that breaks down lactose survives in the microbiome
https://www.youtube.com/watch?v=h90rEkbx95w
Inspired by this post & TF comment I tried symbollic regression [0]
Basically it uses genetic algorithm to find a formula that matches known input and output vectors with minimal loss
I tried to force it to use pi constant but was unable
I don't have much expreience with this library but I'm sure with more tweaks you'll get the right result
from pysr import PySRRegressor
def f(n):
if n % 15 == 0:
return 3
elif n%5 == 0:
return 2
elif n%3 == 0:
return 1
return 0
n = 500
X = np.array(range(1,n)).reshape(-1,1)
Y = np.array([f(n) for n in range(1,n)]).reshape(-1,1)
model = PySRRegressor(
maxsize=25,
niterations=200, # < Increase me for better results
binary_operators=["+", "*"],
unary_operators=["cos", "sin", "exp"],
elementwise_loss="loss(prediction, target) = (prediction - target)^2",
)
model.fit(X,Y)
Result I got is this:
((cos((x0 + x0) * 1.0471969) * 0.66784626) + ((cos(sin(x0 * 0.628323) * -4.0887628) + 0.06374673) * 1.1508249)) + 1.1086457
with compleixty 22 loss: 0.000015800686
The first term is close to 2/3 * cos(2pi*n/3) which is featured in the actual formula in the article. the constant doesn't compare to 11/15 though
[0] https://github.com/MilesCranmer/PySR
Posted by
user070223 on Wednesday November 19, 2025 @02:08AM
from the en.wikipedia.org dept.
Posted by
user070223 on Tuesday November 04, 2025 @01:43AM
from the random.tastemaker.design dept.
New Package Manager(apk) WIP
OpenWrt Upgrade Tool. retaining all of your currently installed packages and configuration
They are updating kernels on yearly basis. 6.12 WIP
web interface for mobile. I think there is an unoffical luci package and a native mobile app.
Notification system. WIP
See also
https://forum.openwrt.org/t/community-question-what-do-you-w...
uMatrix is archived and I think uBlockOrigin is now advised to use(which incorporate uMatrix by enabling advanced settings)
For those who want to try blocking more stuff you can enable hard mode and bind relax blocking mode keyboard shortcut
I'd recommend also enabling filter lists(I advice yokoffing/filterlists and your region/language)
https://github.com/gorhill/uBlock/wiki/Blocking-mode:-hard-m...
I think it acts more as an rss feed reader rather than building and hosting apps on it's own.
A question for strcat / other Graphene developers:
Can you clarify what can one expect from legacy extended support. Will old devices get any more updates? how long, how often, is it just security patches etc..
Thanks for you hard work!
I see you're quite active regarding FF. Nevertheless I'm not sure what you're talking about. I've installed Betterfox ESR on Windows, Linux and Android with no apparent issues.
Posted by
user070223 on Wednesday July 23, 2025 @03:28AM
from the ivonblog.com dept.
Posted by
user070223 on Monday July 21, 2025 @01:23PM
from the 100r.co dept.
Posted by
user070223 on Monday July 21, 2025 @01:21PM
from the ask-hn dept.
Is there a tool which detects what people are searching on your webpage?
Do you think it could be useful? what for?
Other than finding possible hyperlinks
Can you get the info from the browser? I know you could hijack ctrl f but I hate when sites are doing it.
You could side channel based on the jumping in the location in the page I guess.
I have no use for it and not creating dom scripts, but...
In general at high enough depth the ocean temperature is constant[0].
At high latitude like the southern ocean it's constant at whatever depth.
I think the surface ambient temperature is below(cooler) the temperature where the water density is the highest around 4 degrees for pure water(water has negative thermal expansion which causes it to expand and float!), for southern ocean salinity is between 33-34 and maximum density is below 0[1] but still ambient might be lower which means the colder water is lighter.
https://en.wikipedia.org/wiki/File:ThermoclineSeasonDepth.pn...
https://en.wikipedia.org/wiki/File:T-S_diagram.pdf
I've skimmed the result couple of weeks ago, and if I remember it states that there from all machines which takes t time to accomplish something there is one such that sqrt(t) memory is used. so it's at most but not on avg nor amorotized[not sure if et even make sense it the space where the problem lies] (you take the least memory hungry machine)
Inspired by Steve Brunton(on YT) and his colleague, a platform that makes working on/with dynamical systems much easier in terms of sensing, modeling and controlling the dynamics. Eventually iterating quickly using SOTA techniques(compressed sensing, super-resolution(spatial-temporal tradeoff), RandNLA, ML) without the need to understand them deeply
Sensing effectively by optimal (re)positining of the sensors (both number of sensor and physical placement)
Think spatial sensor/data fusion, perhaps using more cheap sensors rather than few expensive
Building a model of the dynamics (based on both reasonable assumption about the system based on grounded physics, and dynamical interpretation of the sensor's data (PySINDy, DMD)
And eventually controlling the dynamics
Love to get your feedback, ideas, if you know about such products/business etc, how could it help any business, real life application, if it interests you, anything :)
A great place to mention Karl Bushby whom is on his way from Punta Arenas, southern Chile to his home in the UK since Nov 1998 by mostly hiking.
He crossed the Darien Gap, the Bering sea walking on ice / glaciers / swimming, as well as swimming the Caspian sea.
In Mongolia he trained to work with camels
Had a lot of issues of course with Russia due to crossing the Bering sea, and maybe the war, as well as covid lockdown in countries, limited days issued for visas etc.
And he just left Turkey and entered Europe! so the only major challenge is swimming the channel.
https://en.wikipedia.org/wiki/Karl_Bushby
Truly, it should have been a smartphone, their performant today is better than my 10 years old (totally fine) desktop
Indeed, one great path to finding those lost civilizations is to follow river vallies, Atlas pro[0] says there is no consensus on past rivers/bodies of water as evident by different maps of the region, but one can follow (underwater) river sediment which were deposited to the sea. During oil search such area was found in Cap Timiris, Mauritiania. Satelite radar image of the area from 2015 did reveal those rivers beds, Tamanrasset River seems to be the biggest, with a big drainage basin. Trees and shrubs indeed grow there.
[0] https://www.youtube.com/watch?v=r-dZj1ZdRtY
Never trained a model, but the precision confused me as I've never considered how many bits should be reserved for exponent/mentisa.
Has anyone architected a model(somehow) such that it has a free hand at using the give bits / choosing the type, or changed types from layer to layer, I mean surely when training for example vision models the first layers deal with the "big(yet simpler) picture"(light/dark, lines etc) where as the last layers are with the fine details etc.
Even though it may not suitable for (existing) hardware impl, it may be advantageous in other place for example in learning rate speed.