Life safety. Youth health and personal interest in its preservation (lecture notes)

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Life safety. Youth health and personal interest in its preservation (lecture notes)

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Lecture No. 3. Youth health and personal interest in its preservation

Youth health is one of the important social values of our society. Preserving and strengthening it is both a vital necessity and a moral duty of every young person. A healthy lifestyle is a person’s personal, deep conviction and confidence that there is no other way to health, the realization of one’s life plans, and ensuring well-being for oneself, one’s family and society does not exist.

Health - this is the education of a sanitary and hygienic culture and culture in the broadest sense of the word: the education of a culture of work and rest, consumption, communication, behavior, a culture of interpersonal relations.

In the life of young people, factors such as insufficient muscle and motor activity (physical inactivity), overnutrition, as well as psycho-emotional overload play an increasingly important role. Our contemporary experiences constant motor-visceral hunger - a lack of impulses coming from intensely working muscles (motor reflexes) and internal organs (visceral). Psycho-emotional tension is due to the fact that the nervous system is constantly overloaded with both healthy, exciting emotions and negative, even disease-causing ones. The pace of life is increasing, the terms of "wear and tear" of knowledge and technology are accelerating, some professions are "aging", science and culture are developing rapidly. All this makes increased demands on the internal resources of a person, his physical and mental health.

About 50% of deaths are due to diseases that are caused, in particular, by unhealthy habits - smoking, drinking alcohol and drugs, too high-calorie and fatty foods, as well as lack of physical activity, a person's response to stress. The idea of the need to maintain and strengthen health should seize people in their youth, when health needs to be strengthened and maintained.

Modern civilization offers a young person more opportunities for health and long life than restrictions. You need to be able to use them: reject excess food and warmth, make up for the lack of physical activity and extinguish excessive mental stimuli, all kinds of stress, negative emotions. In return, you can get health, the opportunity to fully live and work. The cult of health should enter the way of life from a young age. It is necessary that systematic physical education and sports be included in everyday life, lifestyle; proper, rational nutrition; properly organized work and rest, a certain mode of work and rest; a healthy psychological climate at work and at home. All these are components of a healthy lifestyle of the younger generation - it is the basis of health, disease prevention, the basis of active creative longevity.

A young person should have a stronger desire to be healthy, become a full-fledged citizen of society, preserve creative longevity and thereby contribute to the achievements of world civilization.

Authors: Alekseev V.S., Zhidkova O.I., Tkachenko I.V.

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An international team of researchers, including those from the Institute of Solid State Physics at the University of Tokyo, has made a groundbreaking discovery. They successfully demonstrated the use of a single molecule called a fullerene as a transistor-like switch. The team achieved this by applying a finely calibrated laser pulse that allowed them to predictably control the path of the input electron.

The switching process provided by fullerene molecules can be significantly faster than switches used in microchips, with speed increases of three to six orders of magnitude depending on the laser pulses used. The use of fullerene switches on a network could result in a computer with capabilities beyond what is available with electronic transistors. In addition, they have the potential to revolutionize microscopic imaging devices, delivering unprecedented levels of resolution.

More than 70 years ago, physicists discovered that molecules emit electrons in the presence of electric fields and then certain wavelengths of light. The emission of electrons produced patterns that aroused curiosity but eluded explanation. But that has changed thanks to new theoretical analysis, the ramification of which could not only lead to new high-tech applications, but also improve our ability to scrutinize the physical world itself.

A simple analogy of how a fullerene switch works like a train switch. A light pulse can change the path taken by an input electron, represented here by a circuit.

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The fullerene molecule at the heart of the switch is related to the perhaps slightly better known carbon nanotube, although instead of a tube, the fullerene is a sphere of carbon atoms. When placed on a metal dot—essentially the end of a hairpin—the fullerenes orient themselves in a certain way to guide the electrons in a predictable way. Fast laser pulses on the scale of femtoseconds, quadrillionths of a second, or even attoseconds, quintillionths of a second, are focused on fullerene molecules to cause electrons to be emitted. This is the first time laser light has been used to control the emission of electrons from a molecule in this way.

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