Where's /tech/?
also ctrl + enter for post pls
tab space tab space
control x control c
;e
>>1
Make your own site, add /tech/, then we've got /tech/. The docker container is linked to on the front page.
https://0x0.st/itRy.jpg
I bought this USB to UART converter.
It has a genuine FTDI FT232RL chip and, more important, a solid enclosure case.
For youtube video downloading
https://320ytmp3.com/
https://tuberipper.com
https://sconverter.net/en3/
>>7
Just use youtube-dl: https://youtube-dl.org/
>>8
9xbuddy rips from dailymotion and twitter
>>8
Youtube-dl doesn't work for me.
Use this instead youtube-dl.org
How is SINGAPORE ending its WATER SHORTAGE? - VisualPolitik EN
Despite being one of the countries with the highest rainfall in the world, the truth is that Singapore suffers from a significant water shortage and depends on the purchase of water from Malaysia. However, they have drawn up a plan to make Singapore not only self-sufficient but also to become a commercial powerhouse of technology that allows an almost unlimited supply of water.
In this video we give you all the details about Singapore's latest revolution.
Insane Engineering of the Blackbird https://www.youtube.com/watch?v=3hYSnyVLmGE
Spitfire's Fatal Flaw Fixed https://www.youtube.com/watch?v=YzRlga2-Hho
>>10
Try "coconvert"
Researchers from MIT and China have developed a solar desalination device that could provide a family of four with all the drinking water it needs — and it can be made from just $4 worth of materials.
Solar desalination: Water covers more than two-thirds of Earth’s surface, but 97% of it is saltwater. The salt concentration in that water is far too high for our bodies to process — if you drank too much of it, you’d actually become dehydrated and die.
What we need is freshwater, meaning a salt concentration of less than 1%, and since this water isn’t as abundant, humans have come up with lots of ways to remove enough salt from saltwater to make it drinkable.
“I think a real opportunity is the developing world.”
Evelyn Wang
One of those is solar desalination.
While the specifics vary, the basic idea is that the sun’s heat is applied to saltwater. The water evaporates, leaving behind the salt, and the water vapor is then collected and condensed, leaving you with liquid freshwater.
Getting salty: Engineers have created countless solar desalination devices, but for the devices to make a difference in the places that need them the most, they need to be not only cheap and efficient, but also durable and long-lasting.
“We see these very attractive performance numbers, but they’re often limited because of longevity.”
Evelyn Wang
The problem is that salt tends to build up in these devices, particularly on the wick used to pull water through the device. Those wicks are difficult to clean, and over time, the salt accumulation means they have to be replaced.
“The challenge has been the salt fouling issue, that people haven’t really addressed,” researcher Evelyn Wang told MIT News. “So, we see these very attractive performance numbers, but they’re often limited because of longevity. Over time, things will foul.”
The idea: Researchers from MIT and China’s Shanghai Jiao Tong University have now created a wick-free solar desalination device that uses gravity-driven convection to move the water.
Natural convection is a type of movement that occurs when a liquid isn’t one uniform density. In that situation, the less dense liquid will rise, while the denser liquid falls. (The same is true of gasses — because hot air is less dense than cold air, it rises while cold air falls.)
solar desalination
This animation demonstrates how natural convection quickly pulls the dense saltwater down. Credit: MIT
How it works: The new solar desalination device consists of several layers. Salt water is added to the top layer. Black paint draws the sun’s heat to that layer, causing the desired creation of water vapor for collection.
Any water left behind in that layer is then extra salty and, therefore, extra dense.
The very bottom layer of the device contains more saltwater. The layers between it and the top are designed to keep heat in the top layer, while allowing the super-dense saltwater to move downward to mix with the normal density saltwater under the power of natural convection.
Two prototypes of the solar desalination device undergoing outdoor testing. Credit: MIT
Looking ahead: The device worked for a week straight with no signs of salt accumulation, but we still don’t know exactly how long it could operate.
But the best news is that it would cost just $4 to build a solar desalination device large enough to meet the drinking water needs of a family of four, according to the MIT team. If it does prove durable, it could be a relatively cheap way to get freshwater to people in need of it.
“I think a real opportunity is the developing world,” Wang said. “I think that is where there’s [the] most probable impact near-term, because of the simplicity of the design.”
