Glass to protect secrets. Free Technical Library News

NEWS OF SCIENCE AND TECHNOLOGY, NOVELTY IN ELECTRONICS
Free technical library / timeline

Glass to protect secrets

07.02.2005

British engineers have figured out how to protect information that can fly through window glass.

Computers in the office are now usually connected to each other not with wires, but with radio waves. And they easily pass through glass, which means that any attacker can gain access to confidential information.

Scientists at the University of Warwick have created a method for making glass that understands which radio signals can and cannot be emitted outside a building. To achieve this, an electrical circuit is applied to the glass - a tunable dipole grating. It is made using thin film technology from optically transparent components and freely transmits light. Such a lattice has three advantages over conventional, non-adjustable ones.

Firstly, it is possible to block exactly the frequency at which computers communicate with each other, and in which case this setting can be easily changed. Secondly, there is no need to develop a special grille for each window size - just one model is enough that adjusts to any size. Thirdly, it is possible to compensate for small errors that inevitably arise in the manufacture of the grating.

<< Back: Braille display 07.02.2005

>> Forward: virtual tourism 06.02.2005

Latest news of science and technology, new electronics:

Machine for thinning flowers in gardens 02.05.2024

In modern agriculture, technological progress is developing aimed at increasing the efficiency of plant care processes. The innovative Florix flower thinning machine was presented in Italy, designed to optimize the harvesting stage. This tool is equipped with mobile arms, allowing it to be easily adapted to the needs of the garden. The operator can adjust the speed of the thin wires by controlling them from the tractor cab using a joystick. This approach significantly increases the efficiency of the flower thinning process, providing the possibility of individual adjustment to the specific conditions of the garden, as well as the variety and type of fruit grown in it. After testing the Florix machine for two years on various types of fruit, the results were very encouraging. Farmers such as Filiberto Montanari, who has used a Florix machine for several years, have reported a significant reduction in the time and labor required to thin flowers. ... >>

Advanced Infrared Microscope 02.05.2024

Microscopes play an important role in scientific research, allowing scientists to delve into structures and processes invisible to the eye. However, various microscopy methods have their limitations, and among them was the limitation of resolution when using the infrared range. But the latest achievements of Japanese researchers from the University of Tokyo open up new prospects for studying the microworld. Scientists from the University of Tokyo have unveiled a new microscope that will revolutionize the capabilities of infrared microscopy. This advanced instrument allows you to see the internal structures of living bacteria with amazing clarity on the nanometer scale. Typically, mid-infrared microscopes are limited by low resolution, but the latest development from Japanese researchers overcomes these limitations. According to scientists, the developed microscope allows creating images with a resolution of up to 120 nanometers, which is 30 times higher than the resolution of traditional microscopes. ... >>

Air trap for insects 01.05.2024

Agriculture is one of the key sectors of the economy, and pest control is an integral part of this process. A team of scientists from the Indian Council of Agricultural Research-Central Potato Research Institute (ICAR-CPRI), Shimla, has come up with an innovative solution to this problem - a wind-powered insect air trap. This device addresses the shortcomings of traditional pest control methods by providing real-time insect population data. The trap is powered entirely by wind energy, making it an environmentally friendly solution that requires no power. Its unique design allows monitoring of both harmful and beneficial insects, providing a complete overview of the population in any agricultural area. “By assessing target pests at the right time, we can take necessary measures to control both pests and diseases,” says Kapil ... >>

The threat of space debris to the Earth's magnetic field 01.05.2024

More and more often we hear about an increase in the amount of space debris surrounding our planet. However, it is not only active satellites and spacecraft that contribute to this problem, but also debris from old missions. The growing number of satellites launched by companies like SpaceX creates not only opportunities for the development of the Internet, but also serious threats to space security. Experts are now turning their attention to the potential implications for the Earth's magnetic field. Dr. Jonathan McDowell of the Harvard-Smithsonian Center for Astrophysics emphasizes that companies are rapidly deploying satellite constellations, and the number of satellites could grow to 100 in the next decade. The rapid development of these cosmic armadas of satellites can lead to contamination of the Earth's plasma environment with dangerous debris and a threat to the stability of the magnetosphere. Metal debris from used rockets can disrupt the ionosphere and magnetosphere. Both of these systems play a key role in protecting the atmosphere and maintaining ... >>

Solidification of bulk substances 30.04.2024

There are quite a few mysteries in the world of science, and one of them is the strange behavior of bulk materials. They may behave like a solid but suddenly turn into a flowing liquid. This phenomenon has attracted the attention of many researchers, and we may finally be getting closer to solving this mystery. Imagine sand in an hourglass. It usually flows freely, but in some cases its particles begin to get stuck, turning from a liquid to a solid. This transition has important implications for many areas, from drug production to construction. Researchers from the USA have attempted to describe this phenomenon and come closer to understanding it. In the study, the scientists conducted simulations in the laboratory using data from bags of polystyrene beads. They found that the vibrations within these sets had specific frequencies, meaning that only certain types of vibrations could travel through the material. Received ... >>

Random news from the Archive

soft exoskeleton 09.07.2013

For the first time, scientists and engineers have managed to create a "soft exoskeleton" based on the use of artificial muscles, simply put, this is, in fact, a "superman suit" that can be worn to increase strength and endurance.

The unusual unit was created by specialists from Harvard and Boston universities by order of the US Department of Defense. The device is an additional set of muscles that is powered by an air compressor. This fundamentally distinguishes this development from other analogues of the HULC type, which are equipped with heavy metal or plastic "bones" with hydraulic or electric drives. Therefore, the developers call their invention an "exosuit", because as such there is no skeleton in it: only a complex mesh that fits the legs and, with the help of pneumomuscles, helps human muscles bend and unbend the limbs.

The suit includes pneumatic muscles, a compressor, a pressure accumulator (in other words, a compressed air cylinder) and sensors that are installed on the knee, hip and ankle joints. Sensors continuously monitor the position of the legs and contract / straighten the pneumatic muscles at a strictly defined point in time.

Again, the exosuit acts like an extra set of muscles and makes a person stronger, as if he had been intensively engaged in physical training for several years. Theoretically, an exosuit can produce power several times greater than the strength of our muscles, but this raises the question of the permissible load on human bones and joints, because the suit does not have its own artificial skeleton. Nevertheless, for an adult well-trained person, the suit gives serious advantages in strength, even if it increases it by "only" 20-30%. In addition, with the advent of light and powerful muscles, it will be easy to combine an exosuit with an exoskeleton that takes on a load that is unbearable for a person.

According to the developers, the use of the exosuit is very natural: you just feel how the "magic power" helps you walk and lift heavy objects. When you take off the exosuit, you feel like you are losing additional strength. The unique "naturalness" of the exosuit is incomparable to heavy clumsy exoskeletons. Of course, the exosuit does not allow you to carry a load of 10 kg for 100 hours, but in the future it will be possible to hide it under your clothes. The exosuit weighs 7,5 kg and is so finely tuned that the wearer sometimes forgets it exists.

The developers believe that their exosuit can be useful in three areas. Primarily for military purposes, to help soldiers travel longer distances and carry heavier loads. In addition, it can be used in sports and rehabilitation medicine. In the latter case, the exosuit can help people who have not lost the ability to walk, but with weakened or atrophied muscles.

See full Archive of science and technology news, new electronics

All languages of this page

Home page | Library | Articles | Website map | Site Reviews