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Artificial Photosynthesis and Can You Spot the Bots? (Patreon)

Published:
2023-03-22 19:15:01
Imported:
2023-03

Content

AI Makes It Harder To Spot Bots On Social Media

Researchers at Copenhagen Business School conducted a study with 375 participants to find out how well they could distinguish fake social media accounts from real ones. To create the fake accounts, they used AI-generated profile pictures and AI-generated tweets. They found that the participants identified fake accounts with a mean accuracy of 48.9%, which is pretty much as good (or bad) as a random guess. Paper here, press release here.

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Newly-Spotted Asteroid Has Small Chance Of Hitting Earth In 2046

NASA has identified an asteroid that has a 1-in-670 chance of hitting Earth on Feb 14, 2046. The asteroid has a size of about 50 metres. It wouldn’t be an extinction-level event, but would leave a pretty big crater about the size of a city. However, the current measurements have a high uncertainty and the most likely thing to happen next is that, as measurements improve, a collision with Earth can be ruled out. Fingers crossed. You can track the asteroid on the NASA website and find a great summary of the situation on Universe Today.

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Artificial Photosynthesis With Record Efficiency

A European Consortium coordinated by researchers at the Institute of Chemical Research of Catalonia has developed a low-cost fuel cell that uses sunlight to convert carbon dioxide and water to fuels, such as ethanol. They report a record-breaking sunlight-to-fuel efficiency of 10%. Better still, the fuel cell does not rely on rare and costly elements for operation. I believe that the most plausible near-time replacement for fossil fuels are artificially-produced fuels and artificial photosynthesis is a promising way to go about it. Press release here, paper here.

Comments

Anonymous

Maybe artificial photosynthesis could make the need for developing nuclear fusion & render fission plants obsolete. Any thoughts, people?

Anonymous
>>104662610

If this is real and not just hype, it could be interesting. Fuel cells for hydrogen (and other gasses) need rare, expensive elements and so that's a plus. The efficiency is "record breaking" at 10%, which is about half as efficient as solar panels currently -- not so great, but a start. Taking CO2 out of the air is good and then any put back in as a result of burning the ethanol isn't adding any new CO2, just recycling what's there.

Anonymous

If anyone is interested, Green Bank Observatory does a bi-weekly community zoom sharing astronomy news. March 29 is on the DART impact and the orbital changes of that asteroid. You can sign up for the zoom link and get on their mailing list at this link https://greenbankobservatory.org/science/community-zoom-calls/. They post the talks on YouTube afterward and they have those links on their webpage as well.

Anonymous
>>104662610

Do you know the efficient of natural/biological photosynthesis? Here in Germany is discussion about using of bio-mass from corn a.s.o. for electricity. This could be alternative better

Anonymous
>>104662610

Hi Thomas, I do not know about the efficiency of corn, I imagine that the internet would have that information. What I can say about using corn for ethanol is that there are rotten side effects. In the US, instead of growing food corn (and wheat, barley, oats, etc) many farmers have switched a large number of their fields to ethanol corn. This throws off the crop rotation system so that the farmers have to use lots of fertilizer and other chemicals. These chemicals wash into the Mississippi River and contribute to the killing of the wetlands in the Mississippi delta. What we ought to be using for ethanol is switchgrass, which grows natively on the plains of our upper midwest and results in a higher yield of ethanol for the same size of field because it grows much faster and can be harvested many times in a growing season. The switchgrass also leaves a native environment for migratory animals and insects like butterflies and doesn't require chemicals or fertilizer to thrive. Unfortunately, corn-based ethanol is too political -- farmers make a lot of money from it and vote for any politician who promotes it over switchgrass.

Anonymous
>>104662610

Hey Tracy, thanks for your attention. Yes, I looked at Wiki., just about 2% effectivity, if I understood, astonishes me. So what Sabine reports could be hopeful? Interesting to hear, that development in the US is similar to Europe about what you told about corn-farming. Switchgrass, don't really know, but the only little bit Plains-landscape here was in Hungary. People settled down there a thousand years ago. So I don't know if it's growing here. Wish you the best

Anonymous

About artificial photosynthesis as a fossil fuel replacement, I tend to doubt that. The effort to turn algae into biofuels has hit a roadblock: https://www.theguardian.com/environment/2023/mar/17/big-oil-algae-biofuel-funding-cut-exxonmobil I continue to argue that the IFR as large scale baseload power to produce plentiful clean and safe electricity such that fossil fuels can be replaced with electricity, in one form or another, is the way to go.