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Internet for fishing

03.01.2013

Japan has a population of only two percent of the world, but consumes about 10% of the world's fish catch. When the housewives of the Japanese city of Sanriku go to the market for fish, they first go to the Internet. A local fishing company has been running a website since 2010, where the captains of its seiners and trawlers report their catch in real time. And buyers, both individual and wholesale dealers, enter their requests there.

Guided by this information, fishermen go to those points in the ocean where there is a high probability of finding shoals of the desired species. They take as much as ordered. And if they catch a fish that is not in demand today, this catch is simply released alive into the water so as not to harm ecosystems and livestock in vain.

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Self-healing concrete 19.06.2021

In Massachusetts (USA), researchers at the Worcester Polytechnic Institute (WPI) have invented a concrete that can self-fill cracks of a few millimeters in 24 hours. Concrete is the most widely used man-made building material in the world, but it is brittle and prone to cracking under the influence of water, thermal changes, stress, road salt and other factors.

To produce a new type of material, Worcester scientists used an enzyme found in red blood cells - carbonic anhydrase. This made concrete four times stronger than traditional concrete. Self-healing is made possible by the fact that carbonic anhydrase reacts with carbon dioxide from the air, resulting in the formation of calcium carbonate crystals that fill cracks in concrete, strengthening the structure.

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"If tiny cracks can be automatically repaired as soon as they appear, they won't turn into big problems that require repair or replacement. It sounds like science fiction, but it's a real solution to a significant problem in the construction industry," the scientists say.

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