Connect with us

Tech

New molecular computing device has unprecedented reconfigurability, reminiscent of brain plasticity

Published

on

Brain Computing Circuit


In the opening published in the journal Nature, An international team of researchers has described a new molecular device with exceptional computational power.

Reminiscent of the plasticity of connections in the human brain, the device can be instantly reconfigured to solve various computational problems simply by changing the applied voltage. In addition, just as nerve cells can store memories, the same device can store information for future retrieval and processing.

“The brain has a remarkable ability to change its wiring, creating and breaking connections between nerve cells. Achieving something comparable in a physical system has been extremely challenging, ”said Dr. R. Stanley Williams, professor in the Department of Electrical and Computer Engineering at Texas A&M University. “Now we have created a molecular device with amazing reconfigurability, which is achieved not by changing physical connections, as in the brain, but by reprogramming its logic.”

Dr. T. Venkatesan, Director of the Center for Quantum Research and Technology (CQRT) at the University of Oklahoma, Research Fellow at the National Institute of Standards and Technology, Gaithersburg, and Associate Professor of Electrical and Computer Engineering at the National University of Singapore, added that their molecular design could help in the future. in the development of new generation processors with increased processing power and speed, but at the same time consuming significantly less energy.

Whether it’s a familiar laptop or a sophisticated supercomputer, digital technology faces a common enemy – the von Neumann bottleneck. This latency in computational processing is a consequence of modern computer architectures, in which the memory containing data and programs is physically separated from the processor. As a result, computers spend a significant amount of time exchanging information between the two systems, creating a bottleneck. In addition, despite the extremely high processor speed, these devices can be idle for a long time during periods of communication.

As an alternative to the common electronic components used to design memory modules and processors, devices called memristors offer a way to get around the von Neumann bottleneck. Memristors, such as niobium dioxide and vanadium dioxide, convert from an insulator to a conductor at a given temperature. This property gives these types of memristors the ability to perform calculations and store data.

However, despite their many advantages, these metal oxide memristors are made of rare earth elements and can only operate under limited temperature conditions. Consequently, the search continues for promising organic molecules that can serve a comparable memristive function, Williams said.

Dr. Sriobrata Goswami, professor at the Indian Association for the Advancement of Science, developed the material used in this work. The compound has a central metallic atom (iron) is bound to three organic phenylazopyridine molecules called ligands.

“It behaves like an electronic sponge that can reversibly absorb up to six electrons, resulting in seven different redox states,” Shribrata said. “The relationship between these states is the key to the reconfigurability shown in this paper.”

Dr. Sritosh Goswami, a researcher at the National University of Singapore, developed this project by creating a tiny electrical circuit composed of a 40-nanometer layer of molecular film sandwiched between a layer of gold on top and a gold-fused nanodisc and indium tin oxide. at the bottom.

By applying negative voltage to the device, Sritosh saw a current-voltage profile that was unlike anything anyone had seen before. Unlike metal oxide memristors, which can switch from metal to insulator at only one fixed voltage, organic molecular devices can switch back and forth from insulator to conductor at several discrete series voltages.

“So, if you think of a device as a two-position switch, because we have reduced the voltage to a more negative value, the device first switches from on to off, then from off to on, then from on to off, and then back to on. I will say that we were just blown away, ”Venkatesan said. “We had to convince ourselves that what we saw was real.”

Sritosh and Srebrata investigated the molecular mechanisms behind the curious switching behavior using an imaging technique called Raman spectroscopy. In particular, they looked for spectral signatures of the vibrational motion of an organic molecule that could explain the multiple transitions. Their study showed that changing the negative voltage causes the ligands on the molecule to undergo a series of reductive processes or electron acquisition events that cause the molecule to transition between off and on states.

Then, to mathematically describe the extremely complex current-voltage profile of a molecular device, Williams deviated from the traditional approach based on basic physical equations. Instead, he described the behavior of molecules using an if-then-else decision tree algorithm, a common line of code in several computer programs, especially digital games.

“In video games, there is a structure in which a character does something and then something happens as a result. So, if you write this into a computer algorithm, it will be if-then-else statements, ”Williams said. “This is where the molecule switches from on to off as a result of the applied voltage, and that’s when I had the eureka moment to use decision trees to describe these devices, and that worked really well.”

But researchers have gone even further to use these molecular devices to run programs for a variety of real-world computing tasks. Sritosh has shown experimentally that their devices can perform fairly complex calculations in one time step, and then be reprogrammed to perform another task the next moment.

“It was completely unusual; Our device did something similar to what the brain does, but in a very different way, ”Sritosh said. “When you’re learning something new or when making a decision, the brain can really rewire and change the physical wiring. Likewise, we can logically reprogram or reconfigure our devices by giving them a different voltage pulse than they have seen before. “

Venkatesan noted that it would take thousands of transistors to perform the same computational functions as one of their molecular devices with different decision trees. Consequently, he said their technology could first be used in portable devices such as cell phones and sensors, as well as other applications where power is limited.

Reference: “Decision Trees in a Molecular Memristor” by Sritosh Goswami, Rajib Pramanik, Abhijita Patra, Santi Prasada Rata, Martin Foltin, A. Ariando, Damien Thompson, T. Venkatesan, Sribrat Goswami and R. Stanley Williams, September 1, 2021, Nature
DOI: 10.1038 / s41586-021-03748-0

Other study participants include Dr. Abhijit Patra and Dr. Ariando from the National University of Singapore; Dr. Rajib Pramanik and Dr. Santi Prasad Rath of the Indian Association for the Advancement of Science; Dr. Martin Foltin of Hewlett Packard Enterprise, Colorado; and Dr. Damien Thompson of the University of Limerick, Ireland.

Venkatesan said the study points to future discoveries by this collaborative group, which will include the Indian Institute of Science’s Center for Nanoscience and Engineering and NIST’s Microsystems and Nanotechnology Division.

This interdisciplinary and multinational research was supported by the Singapore National Research Foundation through its competitive research programs; Scientific and Engineering Research Council, India; Texas A&M Presidential Development Foundation X-Grants Program; Science, Technology and Research, Singapore, under a Grant for Individual Research in Advanced Manufacturing and Engineering; start-up funds at the University of Oklahoma CQRT; and the Science Foundation of Ireland.





Originally reported by Source link

The featured images are, as they appear on the original report.

Tech

Anti-vaccinators use Instagram Stories and link stickers to spread misinformation

Published

on

Anti-vaccinators use Instagram Stories and link stickers to spread misinformation


How do anti-vaccinators fund their dangerous movement with so many online platforms that ban false information against vaccinations?

According to a new report, Instagram Stories is one of the main outlets Media issues.

The report found “dozens of examples of users” who have armed Facebook’s Stories feature to sell products, promote events and even redirect Instagram users to alternative social media platforms, where they can’t be banned.

This is a special feature that the Media Matters report focuses on.link stickers”it spread to all users of Instagram late last year.

Link stickers allow users to add a link to a third party website to the Stories content. For years, Instagram has avoided allowing off-platform links, except for one link that allows users to add to their profile page. Link stickers eventually gave users this feature, as well as gave antivaxers a way to profit from their accounts.

On Instagram Terms of serviceThe platform will remove the ability to publish account stickers if they “repeatedly share things like hate speech and misinformation or other content that violates our Community Rules”.

However, because Instagram events are ephemeral, they disappear after 24 hours, and antivaxists, conspiracy theorists, and malicious users can spread malicious misinformation and links to their followers.

In addition, some anti-vaccinators who use these methods on Instagram are using backup accounts, which can only be temporary. Suspension, removal of features, or other penalties for violating Instagram policies may work with most bona fide users, but antivaxers do not work in good faith. Many are using the accounts created to avoid the ban, disseminate misinformation against vaccinations through Instagram Stories, and link the stickers as quickly as possible until the last Instagram account is closed.

Instagram has been battling antivaxes on its platform for many years. The company has taken some measures against misinformation about the vaccine, such as banning hashtags related to antivax, good nose even the COVID-19 pandemic. Still, Instagram continues to provide the most productive stuff anti-vaxxer agents in motion with the platform. The Instagram Stories and link stickers feature provides a lifeline for these users, even though Instagram has banned their main accounts.

The stories and link stickers used to spread misinformation about the vaccine are another example of how antivaxers use all the tools at their disposal to tell the story they want to tell, despite the truth.

UPDATE: January 27, 2022, 3:00 p.m. EST An Instagram spokeswoman told Mashable that the company had taken action against two prominent anti-waxes on its platform: Joseph Mercola and Sherry Tenpenny, both of whom were named in the Media Matters report. The full Instagram post is below: “We do not allow people to share posts or links that block vaccines or share incorrect information about COVID-19. We removed @ drtpenny_official for violating our rules, removed two posts from @ drmercola and hacked the #plandemic hash.”





Originally reported by Source link

The featured images are, as they appear on the original report.

Continue Reading

Tech

Thanks for attending the 2022 Mobile World Congress

Published

on


(Source: Honorary)

Your browser does not support HTML5 audio

Chinese smartphone maker Honor Announced on Thursday, February 28, 2022 that it will again participate in the Mobile World Congress.

As the most influential exhibition in the field of mobile communications in the world, the 2022 Mobile World Congress (MWC2022) will be held from February 28 to March 3 in Barcelona, ​​Spain. A number of other major Chinese smartphone companies, including Huawei and XiaomiOnePlus, realme and OPPO have all confirmed their presence.

In addition, the Honor product launch is scheduled for February 28. According to the posters, new products from its Magic series will be released and internet users will think that it will be the Honor Magic4 series.

Previous models in this series include: Magic3, Magic3 Pro, Magic3 Pro + and Magic V. The Magic3 series is equipped with a Snapdragon 888 Plus processor, a multi-camera with a ring and an 89 ° hyper-surface screen.

The Honor Magic V is the company’s first foldable-screen smartphone equipped with a Qualcomm Snapdragon 8 Gen 1, priced at 9,999 yuan ($ 1,571).

SEE ALSO: Honor Magic V: The first foldable smartphone to be equipped with the Snapdragon 8 Gen 1



Originally reported by Source link

The featured images are, as they appear on the original report.

Continue Reading

Tech

Zhipu Technologies finances A and A + rounds

Published

on


(Source: Zhipu Technologies)

Your browser does not support HTML5 audio

Recently reported by Zhipu Technologies it secured several hundred million yuan in Round A and Round A + financing agreements. Round A was invested only by Chengwei Capital, while Round A was led by GL Ventures and then occupied by Chengwei Capital. These two rounds of funding will be used for future product research and market development in the spectrum industry.

Founded in 2018, Zhipu Technologies is a company focused on spectral vision. The company relies on state-of-the-art intelligent spectral imaging equipment and spectral vision analysis systems to help end users overcome previously impossible obstacles.

Today, the company’s spectral imaging products and services are successfully implemented in safety production and environmental protection, involving dozens of large enterprises and large parks. The team led the development of an industrial application standard issued by the China Chemical Safety Association and helped establish an early warning spectral video measurement and control mechanism.

The company’s founding team is from Nanjing University and Tsinghua University. Cao Xun, the company’s founder, has dedicated himself to computer photography for many years, and the first theoretical achievements of the PMVIS spectral video have been published in the most influential journals and conferences in the country and abroad.

SEE: WITINMEM chip company completes $ 32 million round B1 financing

Zhang Jian, the company’s founder and current CEO, said the company has also made progress in miniature spectral camera technology with the idea of ​​laying the foundations for consumer-class production, research, education, medical health and public safety.



Originally reported by Source link

The featured images are, as they appear on the original report.

Continue Reading

Celebs

Celebs11 hours ago

David Adefeso spends valuable time with his family

David Adefeso is spending precious time with his family. Check out the post he left on his social media page....

Celebs22 hours ago

2012 fashion flashback: Angelina’s right foot and the highlights of the red carpet ten years ago | Gallery

By Wonderwall.com Editors 9:14 PST, January 27, 2022 _ One of the most memorable moments of the red carpet of...

Celebs24 hours ago

Gabriel Union is praising the special lady mentioned in Forbes magazine

Gabrielle Union Forbes praises the special lady mentioned. Below you can check out the post he shared on his social...

Celebs1 day ago

Adele’s stresses with boyfriend played a role in Vegas residency debacle | Gallery

By Jessica Wedemeyer 4:42am PST, Jan 27, 2022 — Wonderwall.com is taking a look back at the stars who found love,...

Celebs1 day ago

Porscha Williams shares the best reviews for bare hair

Porscha Williams shared the best reviews for her Go Naked hair line. See his post and some of these comments...

Celebs1 day ago

Celebrities with similar children | Gallery

By Wonderwall.com Editors 20:02 PST, January 26, 2022 _ Do you see both sides? Wonderwall.com It has collected interesting pictures...

Celebs1 day ago

David Adefeso offers fans more financial advice, telling them that their savings accounts are a bad investment

David Adefeso just told fans and followers that their savings account was a bad investment. See what else he has...

Celebs2 days ago

Madonna wants to “bring back” the kiss of the famous Britney Spears on a joint tour and more news | Gallery

By Wonderwall.com Editors 14:30 PST, January 26, 2022 Madonna is on tour with Britney Spears Britney Spears has an open...

Celebs2 days ago

Megan Hood filed for divorce and her fans supported her

Megan Good has appealed for her divorce and fans are supporting her through social media. Check out the full report...

Family reunion meeting: can Briana and Devuan get on the 'right path' to consort Nova? Family reunion meeting: can Briana and Devuan get on the 'right path' to consort Nova?
Celebs2 days ago

Family reunion meeting: can Briana and Devuan get on the ‘right path’ to consort Nova?

Briana invited Devuan to Teen Mom Family Reunion in the hope that they can get on the “right path” (following...

Trending