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This dangerous wind power

07.04.2007

At the Altamont Pass, east of San Francisco Bay (USA), a large wind farm has been operating for about thirty years. More than 70 wind turbines were installed here in the 5000s of the last century, and without any preliminary environmental impact assessment. Now it turned out that windmills are dangerous for birds.

The Altamont Pass is known for its strong and almost constant winds, but at the same time it is an important migration route for many bird species. According to ecologists, from 900 to 1300 birds perish annually under the blades of wind turbines, including those listed in the Red Book.

While the owners of the power plant will have to turn off half of the windmills for two months, the other half in the next two months. It is hoped that these measures will reduce the death of birds. In the future, there are plans to replace the wind turbines with more modern ones, installed on higher towers, so that birds crash into them less often.

Another drawback seen with wind turbines is that they can interfere with radars. But interference can be avoided by upgrading the radar equipment and the computer programs used in it.

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Metal cracks can heal 27.10.2013

Scientists at the Massachusetts Institute of Technology (MIT) have made an unexpected discovery: under certain conditions, a metal can "heal" itself by closing cracks. This discovery could lead to the creation of self-healing materials that can work in the toughest conditions.

The discovery of scientists from MIT has great potential. As it turned out, in some cases, the forces that create cracks do not expand them, but rather "heal", restoring the integrity of the metal. Researchers are confident that it will be possible to create metals that, when cracked, will be able to self-repair and thus maintain structural strength even in the most difficult conditions. Such metals can be used in a wide range of applications, such as turbine blades and drilling tools.

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The scientists plan to study in detail the metal's self-healing mechanism in order to design metal alloys capable of sealing cracks that are common in various operating conditions.

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