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The snake generates energy

05.12.2006

Off the northern coast of Portugal, three modules are being tested to generate electricity from sea waves. The device, about four railway cars long and 3 meters in diameter, invented in Scotland, consists of three articulated sectors. They are anchored at a depth of 50-60 meters a few kilometers from the coast and connected to the land by a power cable.

When this chain bends on the water as the crest of the wave passes, oil is pumped inside, its flow rotates hydraulic motors connected to an electric generator. The power of one "snake" is 750 kilowatts.

If the tests are successful, a whole power plant with a capacity of 24 megawatts will be deployed here, which will be able to power the town for 12 apartments or single-family houses.

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Optimists are not afraid of a heart attack 21.07.2013

Cheerful people are much less likely to suffer a heart attack and die less often from sudden heart failure, according to a new study by scientists at Johns Hopkins University (USA).

Previous studies have already shown that depression and anxiety can trigger a heart attack. But researchers at Hopkins University have confirmed that it is important to stay healthy not just not to become discouraged, but to be cheerful and energetic. The happier a person is, the happier he feels, the lower the likelihood of developing coronary heart disease.

According to scientists, optimists are more likely to live a long and happy life. The feeling of happiness, good mood and cheerfulness have a positive effect on the state of our body and allow us to stay healthy longer. At the same time, scientists warn that this is more likely not about an artificial attempt to force oneself to look at the world positively, but about innate cheerfulness. That is, if a person is lucky to be born an optimist, then his health is at less risk. If a person, on the contrary, is a pessimist, he will not be able to improve his health even with the best mood.

So far, researchers have no explanation for the mechanism that allows optimists to stay healthy for longer. However, statistics show that the risk of heart attack in cheerful people is still less.

Scientists analyzed data on patients with cases of coronary heart disease in the family. The study was carried out for 25 years. All this time, 1483 people were observed by doctors, whose brothers or sisters under the age of 60 suffered a heart attack (as a rule, such people are at risk for developing heart diseases, in particular coronary heart disease).

Especially for this study, patients filled out a questionnaire describing their mood, the presence or absence of anxiety, the level of life satisfaction, etc. During the 25-year follow-up, 208 cases of coronary heart disease occurred in patients - heart attacks, sudden death, acute coronary syndrome. In addition, some patients needed stenting and bypass surgery.

The researchers found that in the group of optimistic participants, heart disease occurred a third less often. And among those optimists who were at high risk for developing cardiovascular disease, the decline was about 50%.

To test their findings, the researchers looked at other people's data. They looked at the medical records of 5992 people. The history of the 16-year follow-up suggests that in this case, too, optimists were much less likely (13%) to suffer from coronary heart disease.

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