The painted window will become a solar panel. Free Technical Library News

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A painted window becomes a solar panel

31.10.2022

Engineers from the Federal Polytechnic School of Lausanne (Switzerland) have created a paint that turns any surface into solar panels. It is transparent, so even windows can act as batteries.

The inventors covered glass with an area of 2,8 square meters with this paint. cm. She was able to absorb light for 500 hours with an efficiency of up to 30,2%. This means that a third of the sunlight was converted into electricity.

The paint is made up of two elements. The first is photosensitive molecules that absorb light. The second is electrolytes, which convert light into electricity and carry it further.

Scientists say that such paint can be both transparent and colored. It can paint almost anything. Engineers are confident that behind their development is the future, in which all surfaces of the house will be able to charge gadgets. So humanity will not have to burn fossil fuels and harm the planet.

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Testosterone prevents men from thinking 08.05.2017

Psychologists at the Wharton School of Business, the University of Western Ontario and the California Institute of Technology have found out how the hormone testosterone affects the ability to think rationally in men. To do this, 243 men were given testosterone or a placebo and forced to solve simple arithmetic problems in which the answer that first comes to mind is incorrect. For example, such: "Together, the racket and the ball cost 1 dollar and 10 cents. The racket is a dollar more expensive than the ball. How much does the ball cost?"

Intuition tells many the wrong answer: ten cents. In reality, of course, the ball only costs five, and the racket costs a dollar more: $1,05. But in order to calculate correctly, you need to question the first answer, and you don’t always want to do this. Especially if there is too much testosterone in the blood. The participants in the experiment who received a dose of the hormone solved problems on average 20% worse than those who got the placebo, and they gave incorrect answers faster, and it took them more time to calculate correctly than the placebo group.

There can be two explanations for this effect of the hormone, says one of the authors of the study, Colin Camerer from Caltech. Testosterone either slows down the thought process of checking the first answer, or enhances self-righteousness. So far, scientists are leaning towards the second option. Testosterone is known to increase the desire for high social status in men, and increased (even unreasonable) self-confidence often helps to achieve this.

The study raises questions about the side effects of testosterone-based drugs. Perhaps such drugs should be tested for their ability to make men think they know something when they don't know anything.

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