Tag Archives: TECHNOLOGY

On Mars, lakes with water were found

We are not talking about living organisms on the Red Planet yet.

Three underground lakes with water were detected near the South Pole of Mars using the radar of the automatic interplanetary station of the European Space Agency “Mars Express”.

This is reported by the BBC.

At the same time, we are not talking about the presence of living organisms on the Red planet — the scientists believe that the water in the Martian lakes is so salty that even the most persistent microbes will not survive.

It is known that on the surface of Mars water in its liquid form can not be due to too thin atmosphere and low temperature. The found lakes are located at a depth of about one and a half kilometers under the polar cap, which consists of ice and sand.

It is noted that previously one such lake has been found in 2018.

Scientists’ version of the high salinity of water in the found lakes is based on the fact that underground Mars temperature is significantly below freezing point. At this temperature, the water in the liquid state can remain only with a high content of salts.

The experiments showed that water saturated with salts of magnesium and calcium perchlorate turns into ice at -123 degrees.

The discovery was made with the help of Marsis radar onboard the orbital station “Mars Express”, which has been circulating around the Red Planet since December 2003.

Scientists have developed a hearing aid for one dollar

The device devoid of sophistication will help millions of elderly people with hearing problems who do not have the means to purchase expensive devices, the developers believe.

In the U.S., a team of engineers from the Georgia Institute of Technology introduced a hearing aid that can be assembled by yourself, spending only one dollar on components for the device. This is what Sci-Tech Daily reports.

“The main problem with existing hearing aids is their price. Because the average cost of a gadget is about $4,700. Their budget analogs are around half a thousand”, — the developers compare.

To reduce the cost of hearing aids, scientists abandoned expensive digital signal processors and instead installed electronic filters to adjust the frequency parameters.

“This part is hidden in a case printed on a 3D printer and is powered by a flat or finger battery,” — explain the scientists.

Lead author Sohum Singh himself suffers from hearing loss.

“I was born with a hearing loss and didn’t use hearing aids until after high school. This project provided me with an opportunity to find out what I can do to help other people who are in the same situation as me but don’t have the resources to purchase hearing aids,” Singh said, answering the question of why he decided to develop a budget gadget for the hearing impaired.

At the same time, the device is not without drawbacks: so far, its size is larger than that of its analogs, and the expected service life is one and a half years. You need to change the batteries in the device once in three weeks.

However, as the authors of the gadget assure, they continue to work on its size.  In the near future they are going to release a compact version of the device, and then move on to clinical trials.

It is known that around the world 230 million people aged 65 years and older are experiencing hearing loss. It usually becomes difficult for them to distinguish between high sounds — the squealing of electronic devices, for example — and certain consonants. It is difficult to understand the speech of the interlocutor, the background noises become incomprehensible and distracting. Such processes can, in the opinion of doctors, accelerate the decline of cognitive abilities.

Coronavirus-killing lamp released in Japan

The invention is harmless to humans but deadly to the virus. The lamp is intended for use in rooms where there are people.

Japanese company Ushio Inc. released the Care 222 UV lamp that can kill indoor coronavirus. This was announced on Tuesday, September 22nd, by Kyodo News.

It is noted that the lamp was developed by the company together with Columbia University. It can be used to disinfect living quarters where people are constantly present — for example, buses, trains, elevators, offices.

UV lamps are widely used as sterilization media, especially in the medical and food industries. However, conventional UV lamps are not used in rooms where people are present, as they cause skin cancer and eye problems.

The new lamp emits ultraviolet rays with a wavelength of 222 nanometers instead of the usual 254. This makes them deadly for the coronavirus, but harmless to humans. The effectiveness of 222-nanometer UV rays in the destruction of COVID-2019 was also confirmed by research from the University of Hiroshima.

The lamp is reported to cost $2,860. So far, the company only works with medical institutions.