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Biographies of great scientists

Directory / Biographies of great scientists

The "Biographies of Great Scientists" section contains fascinating articles on the lives and achievements of famous scientists. Detailed information about their contribution to various fields of science, research and discovery, as well as the impact they had on the modern world. Biographies of great scientists provide a unique opportunity to learn about their lives, historical context, scientific works and ideas that have changed our understanding of the world around us. By immersing yourself in these articles, you can draw inspiration from their achievements and realize the importance of science in the development of mankind.

Biographies of great scientists



See also:

The life of remarkable physicists

The life of remarkable physicists

A fascinating story about the life history of great scientists who made revolutionary discoveries in the field of physics and radio electronics. The units of measurement of the basic physical quantities of electrical engineering are named in their honor.

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Latest news of science and technology, new electronics:

The speech of sperm whales is similar to that of humans 18.05.2024

In the world of the ocean, where the mysterious and unknown coexists with the studied, sperm whales, with their huge brains, are of particular interest to science. Researchers, working with a huge array of audio recordings collected during the Dominica Sperm Whale Project (DSWP) - more than 8000 recordings, seek to unravel the secrets of their communication and understand the structure and complexity of the language of these mysterious creatures. By studying in detail the recordings of 60 sperm whales in the eastern Caribbean, scientists have revealed surprising features of their communication, revealing the complexity of their language. "Our observations indicate that these whales have a highly developed combinatorial communication system, including rubato and ornaments, which indicates their ability to quickly adapt and vary during communication. Despite significant differences in evolution, sperm whales have elements in their communication that are characteristic of human communication," says Shane Gero, a biologist at Carleton University and director of the CETI project. Issl ... >>

Electron spin for quantum information transfer 18.05.2024

The transfer of quantum information remains one of the key tasks of modern science. Recent advances in the use of electron spin to expand the capabilities of information transfer in quantum systems have become very important. Researchers at Lawrence Berkeley National Laboratory are pushing the frontiers of quantum information science by experimenting with the possibilities of electron spin. Electron spin, a natural quantum bit, is a potentially powerful means for storing and transmitting information in quantum systems. Magnon wave packets, collective excitations of electron spin, have revealed their potential to transmit quantum information over significant distances. The work of Berkeley Lab researchers has revolutionized the way such excitations propagate in antiferromagnets, opening up new prospects for quantum technologies. Using pairs of laser pulses, scientists disrupted antiferromagnetic order in one place and simultaneously studied it in another, creating ... >>

Sound-absorbing silk 17.05.2024

In a world where noise is becoming increasingly intrusive, the emergence of innovative materials that can reduce its impact is of great interest. MIT researchers have unveiled a new sound-absorbing silk fabric that promises to revolutionize quiet spaces. The Massachusetts Institute of Technology (MIT) has made significant breakthroughs in the field of sound absorption. Researchers have developed a special silk fabric that can effectively absorb sound and create cozy, quiet environments. The fabric, thinner than a human hair, contains a unique vibrating fiber that is activated when voltage is applied to it. This feature allows the fabric to be used to suppress sound waves in two different ways. The first method uses fabric vibrations to generate sound waves that cover and cancel out unwanted noise, similar to noise-canceling headphones. This p ... >>

Random news from the Archive

Technology for writing and erasing magnets using laser light pulses 26.04.2018

Scientists from the research center HZDR (Helmholtz-Zentrum Dresden-Rossendorf), Germany, working together with colleagues from America, have developed a method that allows you to create or destroy magnetic regions in a specific alloy using a laser light beam. The reversibility of this process opens up wide opportunities for its use in materials processing technologies, optical technologies and information storage technologies.

Scientists at HZDR have been studying various types of iron and aluminum alloys for some time now. They found that changes in the atomic structure of some prototypes of such alloys led to dramatic changes in the magnetic properties of the material. "Our alloy has a well-defined complex structure. In its volume, layers of iron atoms alternate with layers of aluminum atoms," says Rantej Bali, a physicist at HZDR. "When laser light hits such a material, the iron atoms approach each other and at this point the material begins to behave like a magnet."

In their research, scientists used a highly focused laser beam that produces light pulses with a duration of 100 femtoseconds. The first pulse led to the appearance in the alloy of a region with ferromagnetic properties. The second pulse, which had a lower intensity but the same duration, destroyed the magnetic region created by the first pulse. However, a pulse of lesser intensity "erased" the magnet only by half, i.e. half of the initial magnetization level remained in this section of the material. Therefore, a whole series of low-intensity pulses was required to completely erase the magnetic region.

These experiments and observations were carried out using the Bessy II synchrotron, which produces pulses of soft X-ray radiation, due to which the microscope was able to penetrate into the thickness of the material and study the magnetic properties of the samples under study.

If German physicists were responsible for conducting the experimental part of the research, then scientists from the University of Virginia, USA, developed the theoretical base and built the necessary mathematical models. These models showed that very surprising phenomena occur in the alloy medium under the influence of laser light. The first ultra-short laser pulse heats and melts a section of the material. When the alloy is cooled, it goes through a state of so-called "supercooled liquid", i.e. it is still in a liquid state at a temperature below the melting point of the material. The atoms in this liquid move randomly, and when the material solidifies after a few nanoseconds, the iron atoms remain in random positions, giving the material its magnetic properties.

The second, weaker, pulse of laser light causes the atoms to take a certain position in the form of an ordered crystal lattice. At the same time, the energy of laser light is sufficient for the atoms to have time not only to be ordered, but also to separate back into layers of iron and aluminum atoms.

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