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Showing posts from November, 2019

Scientists introduced a device that creates holograms using ultrasound & polystyrene ball

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Researchers at the University of Sussex in the UK have introduced technology that can create holograms using ultrasound and a 2mm polystyrene ball. They can move and interact with the observer.


Scientists called the new technology "multimodal acoustic trap display" (multimodal acoustic trap display, or MATD). Images are created between two horizontal plates on which many tiny ultrasound speakers are mounted. They create an inaudible sound field in which there is a "pocket" of low pressure, where a polystyrene ball enters. By moving the "pocket", you can move the ball, forming an image. Colors are added to the image using the projector.
Through careful monitoring of the ultrasound field, scientists can add sound effects and music to animated images. Vibrations can be adjusted to receive sound waves in the entire range of human hearing and, for example, to imitate clear speech. In addition, you can interact with images and even feel them in your own hands.



The…

Researchers used an AI algorithm to analyze social interactions of monkeys

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An artificial intelligent program that recognizes and follows chimpanzees can make it easier to study the animals in the wild.




Computer scientist  Arsha Nagrani from Oxford University and her colleagues have created artificially intelligent face recognition software that can identify individual chimpanzees on video recordings. As a result, it takes less time and resources to follow animals in their natural habitat and thus study their behavior.
Even in low lightThe Nagrani team trained their algorithm with fifty hours of archive footage of chimpanzees made in southeastern Guinea. 

The video material of 23 monkeys, ranging from newborn to 57 years old, yielded 10 million images of their faces. Based on this, the algorithm 'learned' to recognize and track individual animals.

The algorithm also functioned well in low light and when the recordings were of poor quality. Images on which the chimpanzees did not look directly into the camera were no problem either. 

In 92 percent of the ca…

Do indoor plants purify the air? Science says no

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A study states that air improvement is an exaggeration and that it would take up to 1,000 plants per square metre for its effect to be felt. 



That plants are an excellent decorative element is something no one doubts. However, many give these indoor gardens the power to regenerate the air. But does this ability have a real basis? 
According to a new study by researchers at the University of Drexel, in reality this is simply an exaggeration, as opening a window would be much more useful for cleaning the room than having one of these pot plants.
"This has been a common mistake for some time. Plants are great, but they don't really clean the air in a room fast enough to have an effect on air quality in a home or office." 
Explains Michael Waring, lead author of the article published in the Journal of Exposure Science and Environmental Epidemiology and professor of architectural and environmental engineering at the Drexel School of Engineering.
Waring and one of his doctoral…

Researchers have grown the first ever lungs in mouse embryos

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Methods used on mice are planned to be used for growing an organ in the body of the animal for further transplantation in humans. 
This will solve the main problem of today's transplantology - the need to wait for donor organs.Growing organs from stem cells on synthetic scaffolds is not easy, a new lung growth strategy to grow an organ in the body of an still developing animal.
There are millions of people with incurable lung diseases who are dying from a shortage of donor organs for transplantation. 

A group of scientists from the United States and Japan have grown fully functional lungs in mouse embryos, opening up new opportunities for organ transplants in human patients. The research was published on the Columbia University website.

Considering the difficulties of other groups of scientists growing organs from stem cells on synthetic frames, the researchers have defined a new strategy for organ growth.

They suggested that it might be much easier to raise a new organ in a still deve…

Global Warming Threatens to Wipe Out Emperor Penguins

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They live in almost fifty colonies around Antarctica and it is estimated that there are almost 600,000 of these magnificent Penguins.

Their fate is largely linked to the future of sea ice, which they use as a breeding grounds. The emperor penguins, whose march through the Antarctic ice became famous in 2006 with the film Happy Feet, could be doomed to extinction by the end of this century if climate change continues at the current rate, according to a study published Thursday by the journal Global Change Biology.
The emperor penguin, which is the tallest and heaviest of all the penguin populations, and can reach to 130 centimetres.
They live in almost 50 colonies around Antarctica and it is estimated that there are almost 600,000 of these animals.
In 2012, the International Union for Conservation of Nature (IUCN) transferred the emperor penguin from the species of least concern to near threatened.
"If the global climate continues to warm at the current rate, we expect emperor peng…

Thanks to DNA mutation, some people only need four hours of sleep

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Do you need eight hours of sleep a night or are you gonna be okay on four? 
Biologists examined a family that sleeps much less than average and found that the family members owe their anomalous sleep rhythm to a gene mutation.Biologist Ying-Hui Fu from the University of California, San Francisco, together with colleagues, analysed the genes of twelve members of a family that only sleeps 4.5 hours a night without getting tired. The researchers discovered that the family members have a mutation in the ADRB1 gene.

When the team then bred rats with the same mutation, the animals slept 55 minutes a day less than their peers. This was accompanied by an abnormal activity in a brain area that regulates sleep: part of bridge of Varolius.

MutationsBrain cells in this region of the brain, in which the ADRB1 gene is expressed, are inactive in normal mice during most sleep stages. The cells are active when rats are awake. In the mutated rats, the cells are even more active than usual during waking ho…

What are the dangers of tattoo ink? | Long term effects of tattoos

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Although it is increasingly common to fill your body with ink, many people do not know how their skin reacts after going under a needle.

Although it is becoming increasingly common to fill your body with ink, many people do not know how their skin reacts after getting a tattoo. In particular, health experts point out that inks can trigger allergic reactions, which could generally lead to minor but potentially serious complications.
You're introducing a foreign body through the skin and there are risks. "The body can sometimes react in many ways you never thought it would. Allergic reactions don't have to happen immediately, they can happen weeks or even decades later, according to the American Academy of Dermatology. Beware of the Ink Color These negative effects may depend on the color of the ink used. Many people report mild side effects, such as redness, swelling, or itching, on drawings made with the color red.
Similarly, several reports indicate that this hue may caus…

Scientists discovered the protein responsible for brain cancer metastasis

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It will now become one of the objectives to predict, prevent and treat brain metastases, which is a common cause in cancer deaths.

Large blood vessel (red) in brain tissue treated with exosomes derived from brain metastatic cells (green). Photo: David Lyden
The protein responsible for brain metastases generated by some types of cancer, such as breast cancer, lung cancer and other tumors, has been identified by a team of U.S. researchers.
According to a scientific team made up of researchers from the Weill Cornell Medical Center and the Presbyterian Hospital of New York (United States), this is the protein called CEMIP, which causes blood vessels and immune cells in the brain to produce inflammatory molecules that, in turn, support the survival and progression of cancer cells to form brain tumors.
In a study published in the scientific journal Nature Cell Biology, researchers point out that in laboratory and animal experiments, the elimination of the CEMIP protein largely prevented the pr…

Can vision be restored with retinal implants? | Artificial retina implants

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Blind people could see again with a prosthesis of thousands of electrodes connected to a wireless camera.

A tiny prosthesis implanted in the retina could restore vision in people with retinitis pigmentosa or age-related macular degeneration (AMD), two of the most common causes of blindness.
The implant is being developed by José A. Garrido, Icrea researcher at the Institut Català de Nanociència i Nanotecnologia (ICN2). With a size of about six by six millimetres, it will consist of thousands of graphite electrodes and be wirelessly connected to a camera that the person will wear on glasses.

In this way, the camera will capture what the eye would see and send the signal to the retina. There, the electrodes will convert the signal into stimuli that will be transmitted to the optic nerve. The signal will then reach the visual cortex of the brain, where the image will be perceived.

The idea has already been tested in rats, in which it has been verified that the visual cortex is activated as …

Why does Japan have high life expectancy? | Japan life expectancy reasons

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In a world in which in the last sixty years the number of people 65 years of age or older (from 5 to 9%) has almost doubled, Japan holds the leadership.
The acceleration of aging here is more noticeable than in other places: more than a quarter of the population is 65 years of age or older. In Japan, the most advanced technologies have inspired the public and private sectors in health and innovation policies to ensure a better quality of life for the elderly.

An aging society is a serious challenge for the health system. The solutions offered by Japan centered an international summit in Tokyo that brought together medical experts from all over the world, public officials, start-ups, and foreign delegations.

The centerpiece of the Japanese strategy to establish a digital health care system has been the fusion of medical data and technology.

The German professor Erwin Bottinger, from the Hasso Plattner Institute, is one of the world's leading experts in digital healthcare innovation. &q…

Scientists have developed artificial skin to help restore touch

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Along with hearing and sight, touch is one of the key ways to obtain information and interact with the world around you. And for people who, for some reason, have lost the ability to perceive tactilely, the researchers proposed artificial skin technology with the possibility of touch-sensitive feedback, reports the American Association for the Advancement of Science.Scientists at the EPFL Reconfigurable Robotics Laboratory (RRL), led by Jamie Pike, and the School of Engineering's Soft Bioelectronic Interface (LSBI) laboratory, led by Stephanie Lacour, have proposed a system that combines soft silicone elements with soft sensors and actuators.

Silicone allows you to create the most appropriate form of body parts coating, and multi-layer coating provides signal reception and feedback. 


The sensor layer is located on top of the membrane layer made of pneumatic elements and contains soft electrodes made of a mixture of liquid and solid gallium. 

These electrodes continuously measure the …