Scientists have created a radically new type of graphene speakers

Practically all the existing dynamics work on the same principle: the electric signal generates oscillations of the coil in the field of a permanent magnet, it drives the diffuser, and this, in turn, creates air vibrations and sound waves of the required frequency. But in the future, everything can change, because scientists from the British University of Exeter have created a fundamentally new type of dynamics from graphene, which does not need any mechanical vibration.

The principle of the new dynamics is based on a change in the temperature of graphene, the changes of which lead to the appearance of sound. Previously, graphene has already been used to create speakers, but in the past it was made from diffusers, which led to an increase in the efficiency of the device. From the new dynamics, all the moving parts disappeared, which allowed to reduce its size and increase its effectiveness. The speaker is made in the form factor of a microprocessor the size of a thumbnail. Inside the processor case, in addition to the speaker itself, the amplifier and even the graphic equalizer are hidden.

The thermoacoustic principle of operation allows you to convert the temperature into sound or vice versa – to convert sound vibrations into heat. This effect was first described at the end of the XIX century by the scientist Lord Rayleigh. In the middle of the twentieth century, interest in the interrelation between sound and heat greatly increased, since it was necessary to study the instability in combustion chambers with huge temperature differences. To date, there are thermoacoustic engines and even thermoacoustic refrigerators. But thermoacoustic speakers, and even from graphene, so far no one has created.

Graphene is an excellent conductor, therefore, by passing electrical impulses through it, you can quickly heat up and cool it. The grafen membrane expands and contracts, which affects the ambient air and generates sound waves. How good is the sound obtained in this way? The team of researchers claims that the graphene thermoacoustic speaker allows to get a “rich sound palette”, depending on how and where it is supplied with electricity. Heating and cooling cycles allow you to create multiple audio frequencies at the same time, while mixing them together, amplifying and tuning their sound. Scientists even managed to obtain ultrasound.

The results of research by British scientists were published in the journalScientific Reports.

Please follow and like us:

Mazda will release an “eco-friendly” ICE with an efficiency of 56 percent

Engineers of the company announced the development of the engine Skyactiv-3, the emissions of which will be a quarter less than other internal combustion engines.

Mazda reports that work on creating the engine is already underway. The Skyactiv-3 efficiency is planned to approach 56 percent – in this case emissions should decrease by a quarter.

It is not yet reported how Mazda specialists plan to achieve such efficiency, but the developers plan to release the first such ICE not earlier than 2019 – it is at this time that the production of the Skyactiv-X engine is scheduled, while Skyactiv-3 will appear much later.

Despite the obvious advantages of the engine, the cars with ICE will still pollute the air more than cars with electric drive. Nevertheless, internal combustion engines will not disappear at once, so Mazda’s efforts to reduce emissions are still commendable, although in some countries even they will not be “clean” enough.

In France, for example, more than 90 percent of electricity is already produced without the release of C0 2 into the atmosphere, and European Union officials are gradually tightening the laws for car manufacturers with internal combustion engines, increasingly preferring electric cars.

Please follow and like us:

# video | How to create special effects for the film “Shape of water”

If you already had time to get acquainted with the new work of the remarkable director Guillermo Del Toro under the name Shape of Water, you probably will be interested in a video about how the masters from the Mr. X created amazing special effects for this picture. If, for some reason, you have not seen the movie yet, we strongly recommend that you preview it, since the video in this material contains serious plot spoilers.

Guillermo Del Toro has always been a master at creating eerie, but irresistibly beckoning tales. Recall at least the worlds he created for such films as Chronos (1993), Mutants (1997), The Devil’s Ridge (2001), Hellboy (2004) and The Labyrinth of the Faun (2006). The director has always been attracted by gloomy stories in which you can let your fantasy unfold. Del Toro always carries a notebook, where he makes all kinds of notes on his future films and numerous sketches of future characters and monsters. With what, and with the monsters in his films, everything was always just fine. Over the film “The Form of Water” Del Toro has worked since 2011 and considers him the most difficult from the technical point of view of his work throughout his career.

The basis of the plot “Forms of water” was the love between the dumb employee of the top secret government laboratory and the mysterious amphibian man who is being held prisoner. The director himself believes that it is water that is an amazing substance that can fill any form. In the film, this feeling fills the main characters, hence the name. If you’ve already seen the movie, you’ll probably be surprised at how much work the artists and animators have done. And now it’s not just about the magnificent monster, which once again played a talented actor Doug Jones. In many scenes, special effects are simply invisible, but they create the right atmosphere and set the tone for the story.

Guillermo Del Toro paid part of the special effects from his own pocket, as the budget could not cover all expenses. Initially, the film was planned to be shot in black and white, but as soon as the producers saw what a great picture the director had planned, they allocated additional funds for making the film color. The film has already won two gold globes (for the best soundtrack and the best director), and also made a success at the Venice Film Festival, where the audience applauded standing for several minutes.

Please follow and like us:

American startup is working on the creation of a holopall of Star Trek

Developers from the California start-up Light Field Labby the end of 2018 are planning to release the first working prototype of a believable hologram hovering in the air, which can be seen without special sets. To continue working on the project, the company has already attracted seven million dollars of investment.

Based on its display engineers from Light Field Lab took the idea of ​​a holographic deck from Star Trek. According to the idea of ​​the scriptwriters of the series, the walls of the holopalub consist of special displays capable of producing a very realistic three-dimensional picture, turning an empty room into various locations, recreated by an on-board computer. According to the developers, by 2020 the company plans to finalize the technology and with its help to arrange holographic presentations.

The first test models of displays will be quite small, their area will be 15 x 10 centimeters, but next year it is planned to bring their dimensions to half a meter. From such modules it will be possible to make large coverings up to 30 meters wide. Each display will be able to issue a resolution of 16K and be able to project realistic holograms on its own.

Despite the impressive characteristics and capabilities described by the developers, details of how the technology will be implemented, experts of Light Field Lab have not yet disclosed

Please follow and like us:

At the airport “Domodedovo” introduce a system of face recognition

S7 Airlines plans to introduce a face recognition system at Moscow’s Domodedovo airport based on VisionLabs technologies. If you immediately thought about total surveillance or increased security – you were mistaken. In this case, the face recognition system will only be another pleasant option for business class passengers. It will recognize and personalize passengers in order to provide them with targeted information.

The Russian company VisionLabs is engaged in research and development in the field of computer vision and machine learning. All technologies and algorithms used in the company’s products are created solely by its forces, without the involvement of Western partners or the acquisition of others’ developments. One such software is LUNA PLATFORM, a flexible data management system for verifying and identifying individuals. Most likely, it will be used in this project.

The cameras will be installed at the entrance to the business halls of the airport, after which the system will recognize the faces of passengers and remind them in a timely manner of such important information as, for example, the approaching landing on their flight. Representatives of S7 Airlines immediately clarified that all personal data will be entered into the airport base only with the permission of passengers. Collect the same data is planned using a mobile application and taking photos while scanning the boarding pass at the entrance to the business zone.

The first testing of such a recognition system was carried out at the end of last year. The cameras were installed at the entrance to the S7 Airlines office, and in a short time of tests about 50,000 photographs were taken to the system. The accuracy of recognition at the same time was an impressive 90%. What other services can be provided to passengers through the face recognition system – time will tell. But something tells us that without personalized advertising here, too, will not do. In the US, testing of such recognition systems began as early as last year.

Please follow and like us:

Created by the power of thought, the exoskeleton of the hand

Swiss engineers from the Federal Polytechnic School of Lausanne created a working prototype of the exoskeleton of the hand that can be controlled by the power of thought. The developers were able to do without implanting the electrodes under the skin, placing them on a special rubber helmet.

Impulses of the brain are transmitted from the helmet to the metal “tendons”, which are fixed on the wrists and fingers of the wearer with the help of Velcro fasteners, thereby causing the patient’s hand to move.

The exoskeleton itself is easy to use, installed in a few minutes, and still has the function of controlling the movement of the eyes, which was provided for completely immobilized people. It has already been tested for survivors of stroke and spinal injury patients, now the developers want to improve its work in such a way that it helps people fulfill their daily tasks.

In the course of research conducted by developers in the process of testing the exoskeleton, it turned out that when the thought is controlled by the apparatus of one hand, the brain regions responsible for the movement of the second arm are activated in the patient. Scientists plan to use this feature to improve development management and to complicate its design.

Please follow and like us:

The gadget simulator will help to cope with smartphone dependence

Since smartphones have become an important tool in a person’s life, psychologists increasingly identify the dependence on these devices. In its extreme form, it is expressed in the fact that an attempt to take a device from the hands of a person provokes a reaction, as if the baby was deprived of a pacifier. Austrian designer Clemens Schillinger believes that he came up with a solution to the problem.

Smartphone-dependent people are not only those who spend hours on the mobile Internet. They are forced to twist, touch the device, for them the tactile sensation and touching the touch screen is akin to the umbilical cord, which connects with the real world. Even if this is an exaggeration, you can always look back and see a person who automatically pokes into his smartphone, by inertia, without a specific goal.

Schillinger took as his idea the concept of monastic beads – several large ceramic beads are built into the case with dimensions of the flagship model of the smartphone. They are relatively free to rotate around their axes, which when touched creates the illusion of the usual svaypov and tapes, scrolling and even reverse reaction of the touch screen. At the same time nothing happens, the energy of the battery is not consumed, but the fingers and brain of the dependent person get the usual, calming signals.

Schillinger presented his development within the framework of the Vienna Design Week, in different versions. On his page it is written that sales will start “soon”, but the details are not yet known.

Please follow and like us:

A hand scanner MolecuLight i: X will allow to see bacteria in an open wound

In Toronto, completed the first phase of clinical trials of the device called “MolecuLight i: X”. It is designed to make the world of microbes invisible to the naked eye clearly visible. After all, if the doctor knows exactly where the infection is, he can more effectively cope with it.

MolecuLight i: X is a hand-held non-invasive scanner that locates bacteria on the human body without contact with it. Everything happens in two stages. First, a picture of the wound is taken in high resolution under normal lighting, then similar, but with the light turned off and using ultraviolet illumination.

In the ultraviolet, the healthy skin looks pale green, and the bacterial colonies glow red. If two images are compared, the location and size of the population of harmful microorganisms can be determined with high accuracy. And apply the medicine point-by-point, without spending excess medicines and not affecting healthy tissues.

Clinical trials in the Toronto hospital showed that a competent doctor using the MolecuLight i: X scanner can accelerate the healing of a patient’s wounds by a factor of 9-10. After all, he not only sees the bacteria, but also tracks the healing process of the wound as a whole. It is expected that the technology will be approved for use in Canadian hospitals in the near future.

Please follow and like us:

Apple has officially apologized for deliberately slowing down the iPhone

Not so long ago, a serious drama broke out on the Web , when GeekBench experts found out by experience that as the batteries of some iPhone smartphones deteriorate, they start to work much more slowly than before. Apple tried to defend itself by explaining that this was done in order to avoid sudden gadget shutdowns and to extend the term of their work. But the first lawsuits against the company did not take long. The technological giant from Cupertino had no choice but to publish an official apology on the Web to at least somehow make amends for its users.

Apple values ​​its reputation, so the situation described above can seriously set up a thousand or even hundreds of thousands of users against the famous manufacturer. The official text of the letter turned out to be quite voluminous, and we will not quote it here, limiting ourselves to excerpts from it. If you want to read the original document, you canby this link. In the message, the company tries to explain how exactly the process of aging of batteries takes place, once again stresses that this measure is aimed at preventing unexpected device shutdowns in some situations, and also recognizes that it does not want to upset its users and will try to make amends In front of them.

“We understand that some of our users believe that Apple has let them down. And for that we apologize, the message says. “We have never tried to deliberately shorten the life of our products or to encourage our users to purchase more modern gadgets. Our goal has always been to create products that people will genuinely love. “

In addition to the extended apology, Apple announced that it is now offering customers replacement batteries in service centers at a price of $ 29. Considering that earlier this procedure costed $ 79, a 50-dollar discount is a good attempt to make amends for frustrated users. The renewed service will be launched in the company’s service centers around the world, starting in January 2018. Another good news for many was the promise to release an iPhone firmware update, making its technical state more transparent. Users will be able to see with their own eyes the degree of deterioration of the battery and to assess how much it affects the performance of the system as a whole.

“Here in Apple, the trust of our users means everything to us literally. We will never stop trying to win and maintain it at the highest level. Our work is entirely based on your belief in us and your support, and we do not for a moment forget about it and do not take it for granted. “

The first flagship of Xperia (2018). The main thing is in his corps?

New reports indicate the likelihood of announcements of the new flagship smartphones Sony Xperia at the two forthcoming technological exhibitions – CES 2018 and MWC 2018. Perhaps not all the expected devices will feature full-screen design. But among the proposed characteristics of the novelties, there is also a very pleasant feature, which is as important as the thickness of the screen frames.

It is expected that in February 2018 at the Mobile World Congress (MWC) 2018, Sony announces the flagship smartphones based on the new chipset Snapdragon 845. This chipset in many ways ensures the performance of the device. In more detail, the alleged features of new products were considered by Anvinraj Valiyathara (Anvinraj Valiyathara) on the pages of the resourceplayfuldroid.com.

New “leaks” showed the numbers of models of future phones from Sony – H8216, H8266, H8276 and H296. It is reported that the Sony H8266 will be equipped with a Full HD display and support for Bluetooth 5.0. The software platform for this smartphone will be released in 2017, Google’s operating system Android 8.0 Oreo. It should be noted that the same smartphone manifested itself in the benchmark Geekbench.

Shown a screenshot of the listing Geekbench, reflecting the technical characteristics of the novelty, allows you to make a definite idea of ​​the smartphone. Its chipset is Snapdragon 845. The amount of RAM of the device is 4 gigabytes.

In a single-core test, the Sony H8266 model scored 2393 points, in the multi-core testing – 8300 points. Indicators H8266 in the benchmark Geekbench, comparable to those that are characteristic of one of the most anticipated smartphones of the upcoming technology season – Samsung Galaxy S9 +. These characteristics appeared on the Web earlier.

According to rumors, the considered smartphone can be presented to the public as Sony Xperia XZ of the new generation. Earlier it was also noted that Sony Xperia XZ2 will be characterized by very thin screen frames, which is shown by the renderer, which previouslyhas already been considered. However, today all the “known” about the phone not yet shown is just speculations.

A slightly different picture emerges when considering the alleged features of the model H8266 by Omar Sohail on the pages of the resource wccftech.com. The main differences are in the amount of RAM and the time of the likely announcement of the novelty. According to the announcement, the model H8266 will be equipped with a 5.48-inch FHD-display. It is interesting to note that using a 5.48-inch screen means that the famous Japanese vendor will not equip this smartphone with a trendy screen with an aspect ratio of 18: 9, which is the most visible sign of the modern flagship.

As previously noted, the new smartphone H8266 will be equipped with the Snapdragon 845 chipset. So early, at the very beginning of the year, the flagship announcement based on the chipset of high-end devices of the new generation is impressive. The amount of its RAM will be 6 gigabytes. And it can become the first flagship of the Xperia line, which will be equipped with 6 GB RAM. The novelty can be presented already at the upcoming CES 2018. There is also an unconfirmed assumption that Sony plans to introduce this device in several configurations, which does not exclude the likelihood of the announcement of the version with 4 GB of RAM, which is shown by the benchmark.

In addition to 6 GB of RAM, it is also noted that the smartphone in question, which may be seen soon after the New Year, will be equipped with a built-in UFS-drive with a capacity of 128 gigabytes. The company will also provide users with the opportunity to expand the available capacity of the drive with support for microSD memory card slots. And this is a very nice feature on the background of the fact that many smart phone vendors refused to bundle their devices with memory card slots in order to make the design of devices more elegant.

According to rumors, the battery of the H8266 model will be characterized by a capacity of 3210 mAh. Given the screen resolution of the device in question, this capacity may be sufficient. However, as mentioned above, users are waiting for the appearance of “frameless” Xperia smartphones on the market, as the high ratio of the screen size to the size of the device allows the device to look more beautiful, which is no less important for users than hardware performance and software functions. The year 2018 could be the year for Sony’s smart phones Xperia, a significant yearthe redesign, which will allow the company’s devices to correspond to one of the most striking trends emerging in the digital devices industry in the current year, 2017.