What is GPS and GLONAS? Detailed answer

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What is GPS and GLONAS? Detailed answer

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What is GPS and GLONAS?

These are worldwide systems for determining the coordinates of objects that serve to navigate and search for ships in distress, all-terrain vehicles and even individuals; GPS - American, GLONAS - Russian. 24 satellites of the GPS system, "hanging" above the Earth at an altitude of 20 km, can receive a signal from any point on the surface of our planet. At any time of the day, in any weather, three satellites, having received a signal, can determine the location of any sender of such a signal with an error of less than one meter.

The first three GLONAS satellites were launched in December 2006.

Author: Mendeleev V.A.

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Random news from the Archive

Fish oil protects against schizophrenia 23.08.2015

Researchers at the University of Melbourne, together with colleagues from the Medical University of Vienna, have carried out several clinical experiments with omega-3 polyunsaturated fatty acids (PUFAs). They are found in eggs, nuts, linseed oil, chia plants, but they are especially abundant in fish oil. In earlier studies, it was shown that omega-3s suppress inflammation, on the other hand, in patients with schizophrenia, their levels drop sharply.

The new study involved several dozen young people aged 13 to 25 with early symptoms of the disease: for example, some already had auditory hallucinations ("voices in the head"), but they lasted only a few days, others thought that someone or something trying to harm them, but these thoughts have so far managed to be quickly suppressed. Often such symptoms in less than a year turn into full-fledged schizophrenia.

Half of the young people were given fish oil capsules fortified with omega-12 fatty acids for 3 weeks, while the other half received a placebo in which fish oil tasted only. After a course of tablets, the participants in the experiment were observed for about 7 years. The results were as follows: only 10% of those who took fish oil developed schizophrenia, and 40% of those who took placebo.

Several years of observations speak in favor of new data, which means that the psychoprotective effect of fish oil lasts a long time. However, not too many people participated in the experiment, so now the study needs to be repeated with larger statistics.

Omega-3s have a great advantage over conventional antipsychotic drugs in that omega-3s do not have side effects - they do not increase cholesterol, do not become overweight, and do not increase the risk of diabetes. Everyone heard about polyunsaturated fatty acids, for some time they thought that they treated everything in general, but then, as they say, nuances began to appear. For example, their benefits for the heart and blood vessels are still in doubt.

At the same time, there is an opinion that doubts about PUFAs arise due to the fact that purified polyunsaturated fatty acids are used in experiments. Indeed, there is evidence that the benefits of omega-3 will be if they are not consumed in their pure form, but together, and if, moreover, different types of PUFAs in the preparation are in certain ratios, and that it is best to eat fish oil itself or fish. Well, in the described study about schizophrenia, fish oil itself was used.

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