andlier

20 ms·

1.
by andlier 23d ago
Same, wanted to read it, but ended up just being flabbergasted about the image-rendering, was it my screen? was it intentional, by design? Just closed the page without reading a word and came here to check if other people had the same impr
2.
by andlier 2y ago
Fun fact, there are databases of the exact frequency vs. time and it can be used to accurately time stamp audio/video recordings by correlating the ~50/60hz noise in the recording with the database. Good writeup on the technique a
3.
by andlier 4y ago
A political bet, with enough funding it might make it so… https://www.washingtonpost.com/climate-solutions/japan-hydro...
4.
by andlier 5y ago
This reminded me of the extended range with reversed ski box for tesla. https://electrek.co/2020/03/24/tesla-model-3-roof-rack-box-r...
5.
by andlier 7y ago
No sure how these guys ( https://www.xethru.com/ ) are doing financially, but they sell development kits for respiration sensors etc.
6.
by andlier 8y ago
Microplastics from car tyres seems to be a big source as well: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5664766/
7.
by andlier 8y ago
Protactinium
8.
by andlier 8y ago
After a quick napkin calculation+google it seems the sun has around 20kW of power per square centimeter. So not entirely unfeasible that a cooler star, or a nuclear reactor is closer to the typical 10-100W/cm2 of a modern cpu/gpu.
9.
by andlier 8y ago
The issue with the «chopping» is noise level. Counter rotating propellers are more efficient than a single propeller. «Contra-rotating propellers have been found to be between 6% and 16% more efficient than normal propellers.» https:/
10.
by andlier 9y ago
“Simply put, unleaded fuel burns less smoothly than leaded and the toluene and benzene, which is added to the fuel to act as a lead substitute, burns to form what are called peroxides. Unfortunately peroxides are inherently unstable and exp
11.
by andlier 9y ago
Zero Kelvin is still a different league of special scientifically speaking.
12.
by andlier 9y ago
Resistive power losses in the battery pack, drive inverter, motor, and associated wiring are proportional to the square of the current. Doubling the motor current doubles the torque but quadruples the losses.
13.
by andlier 9y ago
Actually most new (<5 year old) petrol cars use direct injection which emits much more fine soot particles than diesel with particle filter. In EU particle filter for petrol cars is only mandatory from 2017. Also worrysome that most of t
14.
by andlier 9y ago
Apparently this discussion has been on here before: https://news.ycombinator.com/item?id=11896883
15.
by andlier 9y ago
ehh, muddy.ashes.pardon maps to US Holocaust Memorial Museum... ( https://www.ushmm.org/ ) insensitive for sure, is that just a coincidence?
16.
by andlier 9y ago
Even if we covered the earth in windmills, we'd still only affect the lowest 100-200m of the atmosphere. And windmills can only extract 50% of the winds energy. I'm thinking a forest full of trees might even reduce the windspeed m
17.
by andlier 9y ago
Me five. This isn't the first time I've had this happen.
18.
by andlier 9y ago
I'm happy with my Yaesu VX-6R, bought it 11 years ago, same day I got my license. Incredibly sturdy and amazing build quality, submersible to 1 meter, die-cast aluminium and O-ring sealed ear-plug/antenna connections. There are so
19.
by andlier 9y ago
If each cell is connected to the bus bars with fuse wire (like in the Tesla battery pack for instance) this connection diagram seems valid. Same way it is connected in the car/powerwall packs that tesla makes at least.
20.
by andlier 9y ago
I'm a bit tired of all these CO2 comparisons regarding electric vehicles. If we put the CO2 emissions aside, there are so many other benefits moving to EV's. Especially reduced local pollution in cities such as NOx, VOC and partic
21.
by andlier 9y ago
[0] Estimate about half of the particulate emissions comes from non-combustion sources (brake wear, tire/road wear, dust re-suspension). Interestingly 16-55% of these particle emissions in city-areas comes from brake wear, which should
22.
by andlier 9y ago
I'm trying https://www.jottacloud.com now, they have an unlimited plan for ~$70/year. Funny story; They previously had a clause in the terms about restricting storage space for users with abnormal usage patterns. A fri
23.
by andlier 10y ago
Just be sure to read the datasheet carefully. That particular capacitor is only ~120uF at typical 3.3V DC voltage. At 5V DC (which isn't really advisable for a 6.3V rated cap) it is only 88uF.
24.
by andlier 10y ago
This: https://www.lhup.edu/~dsimanek/museum/DDWFTTW.htm
25.
by andlier 10y ago
There is a fascinating BBC-documentary about chemical warfare history and the british Porton Down military research facility, hosted by Michael Mosley [0]. There is a part where the researcher actually makes sarin and VX right in front of M
26.
by andlier 10y ago
The headline and article are a bit misleading, the share of completely electric cars (no internal combustion engine) is actually dropping compared to last year as there are some newly introduced tax-reductions and benefits for hybrid plug-i
27.
by andlier 10y ago
You are correct, the link to powertechsystems.eu has those erroneous percentage calculations.
28.
by andlier 10y ago
40kg for lead acid equals 13.6kg for lithium so that's 66% lighter.
29.
by andlier 10y ago
Here in Norway we had this publicly funded mushroom control staff located strategically near the forest to allow people to get their mushroom-forage checked by an expert. They would literally go through all the mushrooms in your basket and
30.
by andlier 11y ago
There is Minikeepass, supports keepass files on iOS. ( http://minikeepass.github.io/ )

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