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The world’s smallest antenna


CanadaResearchers at the University of Montreal (UdeM) created a nanoantenna 20,000 times smaller than a human hair to track the movement of proteins.

Fluorescent nanoantennas are used in protein research. Photo: Caitlin Monney

In a study published on December 30, 2021 in the journal Nature Methods, Scott Harroun, PhD student in chemistry at UdeM, and colleagues say antennas are a new way to track structural changes in proteins over time, helping scientists better understand the technology Natural nano and human design.

More than 40 years ago, researchers invented the first DNA synthesis machine to create molecules that encode genetic information. “In recent years, chemists have realized the possibility of using DNA to make a wide range of structures and nanomachines. Inspired by DNA’s Lego-like character with building blocks 20,000 smaller than a human hair times, we created a DNA-based fluorescent nanoantenna that helps describe the function of proteins.Just like two-way radios can receive and transmit radio waves, fluorescent nanoantennas receive light at one color, or step. waves, and depending on the motion of the protein, it transmits light back in a different color for us to detect,” the team said.

One of the major innovations in nanoantennas is that the antenna’s receiver is fitted with a sensor to sense the molecular surface of a protein through molecular interactions. The main advantage of using DNA to make nanoantennas is that the chemistry of DNA is relatively simple and easy to program, according to Harroun.

Nanoantennas can be synthesized with different wavelengths to optimize their function. The researchers can easily bind the fluorescent molecule to DNA, and then link the fluorescent nanoantenna to a nanobiological machine like an enzyme. By carefully tweaking the design, the team created a 5-nanometer-long nanoantenna that emits a characteristic signal when the protein performs a biological function.

In addition to helping researchers understand how natural nanomachines work or fail to cause disease, the method also helps chemists identify new drugs and guide nanoengineers in the development of machines. What excites the team most is that many laboratories equipped with spectrometers can use nanoantennas to track their favorite proteins, thereby identifying new drugs or developing new nanotechnology.

An Khang (Follow Phys.org)

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Robot can dig through the hardest rock


AmericaPetra, a San Francisco startup, has developed a “Swifty” heat-drilling semi-autonomous robot that can penetrate the hardest geological formations by crushing rock into powder.

Thanks to a combination of heat and high pressure, the tunneling robot can drill through hard rock. Photo: Petra

Instead of using a mechanical drill, the robot “Swifty” uses a hot drill with high pressure to remove the rock layer without direct contact. In a recent test, Swifty tunneled 45 – 152 cm wide through crumbling all kinds of rocks. The test involved a 60cm wide tunnel through 6m of sioux quartzite, the hardest rock on Earth that can only be broken with explosives. The robot tunnels at a speed of about 2.5 cm/min.

“Previously, there was no method that could dig through this hard rock. Petra’s achievement was thanks to Swifty’s thermal drilling method that was able to effectively cut through rock without touching,” said Ian Wright, director. Petra’s chief technology officer, said.

Petra’s robot uses machine vision, an artificial intelligence system that allows the robot to “see” and make decisions based on obstacles it encounters. When in operation, the robot breaks the rock with a mixture of hot gases above 1,000 degrees Celsius, turning the rock layer into smaller debris. After the rock layer is broken, a powerful vacuum cleaner sucks up the debris, clearing the way for the robot to continue drilling.

“Petra can drill through the hardest geological formations in the ground, allowing customers to install equipment underground in rugged geographies prone to wildfires and rainstorms. In addition, we can simply digitize projects in the city by allowing engineers to locate beneath the existing infrastructure maze,” a Petra company representative shared.

Petra’s technology was inspired by an experiment conducted by scientists at Los Alamos National Laboratory in the 1960s. They designed a nuclear-powered tunneling machine that could travel through the upper mantle of the Earth or even the crust of the Moon. That rock-melting drill never materialized, but Petra learned from the project and performed its first tests in an industrial park in Oakland, California in 2018. Initial testing used plasma but the techniques Engineers quickly switched to gas and heat to make the device less bulky.

Petra’s Swifty robot aims to dig tunnels through bedrock cheap enough to provide the incentive for businesses to put power lines, network wires and other lines underground. According to Petra, Swifty’s thermal drill can reduce the cost of tunneling through bedrock by 50-80%. The company is testing thermal drilling with rocks ranging from granite to limestone in areas from California to the Appalachian Mountains.

An Khang (Follow ZME Science)

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China’s ‘artificial sun’ sets a new record


In an experiment on December 30, 2021, China’s superconducting Tokamak reactor maintained a plasma hot to 70 million degrees Celsius for more than 1,000 seconds.

This is the longest sustained period of superheated plasma compared to all Tokamak reactors in the world, said researcher Gong Xianzu at the Institute of Plasma Physics of the Chinese Academy of Sciences (ASIPP), assistant responsible for experimentation, emphasis.

“In an experiment in mid-2021, we achieved a record plasma temperature of up to 120 million degrees Celsius in 101 seconds. This time, the plasma was more stable at nearly 70 million degrees Celsius for 1,056 seconds, creating a solid scientific foundation to move towards operating an industrial-scale fusion reactor,” Xianzu said in a statement yesterday.

China’s artificial sun. Photo: Xinhua

The experimental advanced superconducting Tokamak reactor (EAST), also known as China’s “artificial sun”, is located in Hefei city, Anhui province. It is designed to simulate a Sun-like fusion reaction, using hydrogen and deuterium gas as fuel. The device will support plasma physics research to set up large-scale reactors, aiming to generate virtually limitless clean energy, according to China National Nuclear Corporation (CNNC).

Fusion energy is considered the “most ideal energy” for a carbon-neutral future because it does not emit greenhouse gases, and fuels from hydrogen and deuterium are abundant in the ocean.

Now, EAST has accomplished all three separate goals of reaching a current of one million amps, maintaining a superheated plasma of over 1,000 seconds, and a temperature of over 100 million degrees Celsius. The final mission is to achieve three goals at once. target in one test.

EAST’s impressive achievements have topped the list of 10 Chinese science and technology news in 2021 voted by China Media Group.

Doan Duong (Follow China Daily/CGTN)

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The first maglev using permanent magnetic field technology


China’s new generation maglev train Xingguo on December 14 left the assembly line in Wuhan city, Hubei province.

Xingguo maglev at the assembly facility in Wuhan. Photo: CNS

The project is jointly developed by Jiangxi University of Science and Technology (JUST) and China Railway Science Industry Corporation (CRSIC). This is the first time that permanent magnetic levitation technology has been applied to an elevated maglev, not only in China but around the world.

Xingguo uses contactless thrust and has a strong climbing ability. Permanent magnetic technology helps vehicles save energy and protect the environment.

China’s new generation maglev is an unmanned monorail, with carriages traveling on an elevated monorail supported by steel and concrete pillars. The vehicle can carry 88 passengers and has a top speed of 120 km/h.

The space inside the Xingguo ship.  Photo: CNS

The space inside the Xingguo ship. Photo: CNS

According to chief technician Wang Zhongmei at CRSIC, China is the third country in the world after Japan and Germany to master the technology of maglev.

The biggest advantage of a maglev over a traditional train is that it takes up less space and has better visibility. Vehicles are also undisturbed by pedestrians and motor vehicles.

Xingguo train has a compact design, only 1/5 of the subway, suitable for linking tourist attractions, commercial areas and science – technology parks.

Doan Duong (Follow CNS)

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Reusable rocket works like an airplane


AmericaRocket Lab’s largest rocket will have a cone that can unfold like a petal for easy retrieval and reuse.

Design of the petal-shaped tip of the Neutron rocket. Photo: Rocket Lab

Peter Beck, the chief executive officer of Rocket Lab, announced the design details of the new medium-sized booster, the Neutron rocket, on December 2. The vehicle will make its first flight in 2024. First introduced in March 2021, the Neutron will consist of two propulsion stages. The first floor is equipped with a 4-wing cargo compartment cover that can be opened in a flower-like orbit to free the second floor to carry cargo. The entire first floor, including the hood, is designed for complete reuse and near-instant re-release. The second stage used to bring cargo to the target orbit is now only one-time use.

According to Beck, the Neutron will act more like an aircraft than a missile and require minimal maintenance between flights. “This is a reusable launch vehicle, which means it will land. Neutrons need landing gear to land like SpaceX’s Falcon 9, Falcon Heavy and Starship vehicles. Bringing the vehicle back to the launch site without the need for a barge. Cost is also important,” Beck said.

The carbon fiber 3D printed Neutron rocket will feature a new engine called Archimedes, which uses a combination of methane and liquid oxygen, one of the most sustainable rocket fuel blends, according to propulsion scientists fire. Seven Archimedes engines, each with a capacity of one meganewton, will power the first stage of the Neutron rocket. The second stage will be powered by an Archimedes engine. The combination of ultralight carbon fiber and aerodynamically optimized fuselage design will allow Rocket Lab to reduce rocket weight.

According to Rocket Lab, Neutron’s ultralight carbon composite construction means that Archimedes doesn’t need the extreme performance and complexity of larger rocket systems. By developing an engine that meets modest operating requirements, development and testing schedules will be significantly accelerated.

Both the rocket’s fuselage and engine are 3D-printed, using a technique called automated filament replacement, which makes it possible to manufacture the entire engine within a day. Neutron rocket is 40 m high and has a 7 m diameter base, each booster weighs 490 tons when launched. This rocket can launch 8 tons of cargo into low orbit 1,000 km above the ground in re-usable mode. Rocket Lab also said the rocket can carry people and goods to the Moon and Mars, the maximum weight for a flight to the Moon is 2,200 kg. Rocket Lab’s first rocket was the Electron disposable vehicle, which carried small cargo (300 kg).

An Khang (Follow Space)

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Elon Musk’s humanoid robot is controversial


Some tech experts think that Elon Musk is flaunting the Tesla Bot model because developing a humanoid robot is unlikely to be completed in a year.

On August 19, Elon Musk announced the Tesla Bot project during the company’s AI Day event. Many people are optimistic, believing that Tesla Bot will change lives in the future and is a product worth looking forward to. However, others doubt Musk’s robot project is just a joke.

Tesla’s robot was introduced by Elon Musk during the “AI Day” event on August 19. Video: Tesla

Musk’s post about Tesla Bot on Twitter received great attention. The video introducing the robot alone attracted 1.5 million views, 43,600 likes, 9,600 shares and 4,300 comments. Among them, a Twitter account asked Musk if robots like the Tesla Bot would be mass-produced and sent to Mars. Musk replied succinctly: “I hope so.”

Meanwhile, according to The Verge, to consider the possibility that Tesla Bot may launch next year as Musk said, can take Boston Dynamics as a reference. This is the world’s most advanced robotics company with Atlas – a humanoid robot designed for search and rescue missions, announced in July 2013. After eight years, Atlas is still not commercialized.

Carl Berry, lecturer in robotics engineering at the University of Central Lancashire (UK), says: “I’m not against Musk working in this area, but it’s not good to be hyped like that.”

Berry emphasized that developing an AI robot in manufacturing often requires making a machine as simple as possible, not the most complex as Musk is doing with the Tesla Bot. He said that Tesla producing humanoid robots within a year is difficult to come true.

Some experts believe that Musk’s introduction of this robot model at the AI ​​event is just a “magic” to distract the public from the recent scandals related to Tesla’s self-driving car system.

“I can say for sure, it will be more than 10 years before a humanoid robot, manufactured by any company, can go to the grocery store and shop on its own,” said Raj Rajkumar, a professor of engineering. electricity and computers at Carnegie Mellon University, USA told Reuters.

According to Musk’s description, Tesla Bot is about 172 cm tall, weighs 56 kg, is made of lightweight materials, can travel at a maximum speed of 8 km / h, carries 20 kg of goods, lifts 68 heavy objects. kg. The robot’s head integrates the camera used in Tesla electric vehicles, allowing it to sense its surroundings and a screen to display information.

Basically, this robot is operated by the same AI system on Tesla’s electric car. The Tesla CEO said the robot was designed to be “friendly and navigable in a world built for humans” and to fill the void left by labor shortages.

My Quyen synthetic

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Outstanding image and sound technology on Smart AI TV Aqua


Smart AI TV Aqua is equipped with Quantum Dot (QLED) picture technology, Wide Color Gamut, HDR; Dolby Digital surround sound for a more realistic, immersive listening and viewing experience.

Aqua Vietnam invests in a series of modern technologies on Smart AI TV to meet the home entertainment needs of thousands of users. In particular, image and sound processing technology is considered the key to optimizing the audiovisual experience. The high-end S6 product line is fully equipped with features for a more complete user experience.

The series of technologies that make up the picture quality of Smart AI TV

Smart AI TV converges many advanced picture technologies such as Quantum Dot (QLED), Wide Color Gamut, HDR Plus… to bring sharpness and contrast, colors closest to reality.

Quantum Dot screen technology with the advantage of brightness, is applied to many new generation TVs. Quantum Dot reproduces images on millions of nano-quantum dots, optimizing display quality in a variety of spaces and brightness, providing a vivid and realistic visual experience. According to Aqua representatives, the colors that users are seeing on the Quantum Dot screen are like the colors of real-life objects.

The ability to reproduce the color range is one of the factors that manufacturers care about. The TV is equipped with Wide Color Gamut technology for a wide color range, more colors than the three basic RGB color bands (red, blue, blue) today. As a result, Smart AI TV presents a variety of color shades, allowing viewers to enjoy details with vibrant, natural colors that are close to the original. Wide Color Gamut is one of the most modern color processing technologies applied by many popular TV brands.

Quantum Dot screen for lines, colors show more clearly in every detail.

The contrast of this TV is also supported by modern technology HDR Plus. Vibrant color contrast also enhances brightness, extending from the darkest to the brightest. HDR Plus helps you feel every line and detail hidden deep inside the image. You can see faint clouds, small movements in the night. The created image also has depth, rich in color, light and contrast, allowing viewers to capture every impressive moment.

With high resolution and sharpness, fast movements in football matches can be smooth, minimizing stuttering and blurring. With Aqua Vietnam’s high-end TV, men can enjoy receiving special matches during this Euro Cup season. The listening and viewing experience doesn’t just stop at the image, the user feels like witnessing and immersing himself in the exciting match. This TV is also suitable for those who like to watch movies, play games…

The duo Dolby Digital, dbx-tv elevate the sound for TV

Dolby Digital surround sound emulation technology is invested by Aqua Vietnam on high-end televisions with the goal of bringing home theater to the family. Thanks to the advantage of sound processing, Dolby Digital is one of the most modern audio upgrade solutions available today. Dolby Digital helps Smart AI TV Aqua emit digital sound, spreading in many directions so that listeners can enjoy the feeling of sitting in a theater.

Dolby Digital and dbx-tv let listeners enjoy immersive, theater-like sound.

Dolby Digital and dbx-tv let listeners enjoy immersive, theater-like sound.

The plus point of Smart AI TV is that it integrates the soundbar into the TV so that users can save costs in choosing audio speakers, and also reduce complicated connection operations. The 26W power of 6 speakers helps Aqua TV more fully transmit powerful, deep sound levels thanks to the built-in subwoofer. High-quality speakers are enough to immerse you in a world of immersive sound.

Each sound is fine-tuned to achieve the perfect pitch, reverberation, and volume thanks to the professional sound processing system dbx-tv. dbx-tv will correct the tonal imbalance, increase or decrease the frequency range to limit unwanted audio parts, filter out the maximum noise. Bass sound is reproduced better, meeting the increasing demand for entertainment.

In addition to image and sound technology, the TV helps families enjoy many unique entertainment programs … with a rich store of entertainment content. Popular movies, reality TV shows, music, game shows… are constantly updated with content on nearly 200 channels of FPT Play, Netflix, YouTube, NCT…

Miss Do Thi Ha chose Aqua TV because of its artificial intelligence application, sharp screen, and diverse content store for a breakthrough experience that far exceeds expectations.

Miss Do Thi Ha chose Aqua TV because of its artificial intelligence application, sharp screen, and diverse content store for a breakthrough experience that far exceeds expectations.

Users who buy this TV line also enjoy many incentives such as installments, genuine warranty… Aqua also offers a family entertainment package up to nearly 1.4 million VND including VIP NCT (My Music) 799,000 VND. , Family member package of FPT 600,000 VND.

With the motto “Taking the user’s emotions as the main”, in the future, the brand will constantly upgrade image and sound quality to provide an optimal listening and viewing experience. See more Aqua TV product lines here.

Ngoc An

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Odd Job finder application


Odd Job is a mobile application providing e-commerce floor services in connecting workers and customers developed by Odd Job Co., Ltd.

Specifically, the application connects individuals and businesses providing services on repairing, upgrading, renovating… the damage arising in the family; home transportation services; find hourly maids or even take care and beautify customers in need quickly, saving time and costs.

Odd Job works on both the mobile app and the website, so there are no device and location restrictions. The services this application provides will depend on the diversity of professions of the craftsmen involved in the application. The current services that Odd Job provides include: construction/repair/painting, electrical, plumbing, home appliances, electronics, car repair, door lock installation, house moving, cleaning. , beauty at home, nail…

The application has a function to find workers on the map.

In addition, the application is also built on a simple, convenient, easy-to-use and experience platform for first-time customers with many outstanding features:

Various services: Odd Job provides a variety of necessary services from replacement, repair of damage arising in the family to house transportation, cleaning or home beauty services.

Function to find workers on the map: The function of finding workers on the map will help customers easily find the right worker for their needs in the nearest location, meeting their needs in urgent cases, needing workers to come right away. At the same time, this also helps workers expand the area known to customers, especially the number of guests near where they live, making travel more convenient as well as saving costs.

Odd Job brings outstanding features to users

Odd Job brings many convenient features for users.

Price reference: Customers and workers will exchange, negotiate and receive quotes directly with each other without going through Odd Job. Thereby, customers can compare and refer to the appropriate prices to choose whether to use the service of a mechanic or not.

Honest review: Before choosing a mechanic’s service, customers can view honest and objective reviews from previous customers to easily know the quality of the worker’s service. Besides, the introduction, contact information and services provided by the craftsmen are also clearly presented in the application page so that customers can see the details.

Appointment management: Through the application, customers and workers can easily manage work appointments with each other, customers will easily control the work schedule and complete the work of the workers.

Odd Job application is available on Google Play Store (for Android) and Apple App Store (for iOS) with two versions for job seekers and account managers.

More than 1,500 service workers are using Odd Job, a company representative said.

More than 1,500 service workers are using Odd Job, a company representative said.

Currently, Odd Job is deployed mainly in Ho Chi Minh City with more than 1,500 workers and many types of services are available on the application to serve customers. It is planned that in the near future, the company will expand the application scale in major cities and provinces across the country to serve the needs of the majority of customers.

The Dan

Contact Info: Odd Job Co., Ltd

Address: Millennium Masteri Building, 132 Ben Van Don, Ward 6, District 4, Ho Chi Minh City, Vietnam
Hotline: 028 3535 4030
Zalo: 0777 35 4030
Website: https://oddjob.vn/
Email: [email protected]

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Facebook Content Moderators’ Daily Nightmare


Isabella Plunkett, who has been at Facebook for two years, says: “Content moderation is not a job you can forget when you get home, what you see is imprinted in your mind.”

Isabella Plunkett is 26 years old, content moderator for Facebook in Ireland. In early May, she spoke before the Irish Parliament’s Business, Trade and Employment Committee about the first evidence related to the psychological harm of this work.

Plunkett was the first to reveal the moderation work for Facebook. Image: AFP.

Plunkett works for Covalen, one of Facebook’s largest contractors in Ireland. Every day she has to process about 100 reports, which can be videos, images and text articles on the Facebook platform. They often contain violent, suicidal, and abusive content.

She is also not allowed to work remotely, unlike her colleagues hired directly by Facebook. “High priority requests, including violent content, child abuse and suicide, are not assigned to remote workers. The burden falls on us. Every day is a nightmare, the Support measures are not enough,” Plunkett said. Going to the office every day and being exposed to the above content made her shy and had to take sedatives.

Facebook says it has a 24-hour psychological help service, but Plunkett insists those people are not professional psychologists. “I met them but didn’t get the support I needed. Can’t say that I was relieved of my burden after leaving work and slept well. It stuck, even when I sat watching TV, I remembered the memories of the times. scenes that I had to censor,” she said.

Contractor employees are allowed to spend 1.5 hours per week on mental health care. They can use this time to meet with counselors, go for a walk or take a break if they feel overwhelmed.

“That time wasn’t enough. What I saw appeared in my dreams. I remembered it, experienced it again and it was scary. You never know what will happen next but you have to. watch the whole thing from start to finish to track down the violator,” recalls Plunkett.

Some moderators are required to sign a memorandum before starting work, which accepts that the content they must review could lead to impaired mental health or post-traumatic stress disorder. . They even have to sign a confidentiality agreement (NDA) at the start of the job.

A Facebook representative said NDA is normal and moderators can discuss work with doctors and psychologists. Facebook employees can talk about the challenges and rewards of their work with loved ones, but they must not disclose the specific content they value.

A Facebook content moderation center in Berlin, Germany.  Photo: New York Times.

A Facebook content moderation center. Photo: New York Times.

“People who browse Facebook content must undergo intensive training in community standards, as well as access psychological support to ensure their well-being. In Ireland, this includes 24/7 support. onsite with trained psychologists, call systems and private health care from the get-go.We also employ a variety of techniques to minimize exposure risk. exposed to dangerous content,” said a Facebook representative.

Facebook’s moderation system relies on human staff and machine learning algorithms. Facebook hopes to reduce the number of moderators and gradually replace it with machine learning technology. However, Lunkett thinks this is just one of the illusions of American social networks when the systems are nowhere to be found.

Lunkett argues that people are threatened with not being able to speak up because of the NDA clause and the risk of losing their jobs. She cited an internal Facebook communication report in which a colleague’s post was deleted. Facebook denies this, insisting there is no form of punishment for those who reveal secrets.

“People complain about the way Facebook is being treated and they don’t feel safe. There’s clearly some covert activity,” Plunkett said.

Diep Anh (according to the BBC)

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Another Indian hands over ‘VMware’ as CEO of global technology company


Highlights:

  • VMware selects Rangarajan Raghuram of Indian descent as CEO
  • Rangarajan Raghuram will take over in June
  • After the election of Raghuram, his colleague Sanjay Punen resigned.

New Delhi: Cloud and virtualization company VMware has selected Rangarajan Raghuram, of Indian descent, as its CEO. Raghuram will take over in June. However, after Raghuram’s election, Sanjay Punen, a colleague of Indian descent, has resigned. VMware is a company owned by Dell Technology.

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Raghuram and Punen were both working as COOs in VMware and were vying for the CEE position. The post fell vacant following the resignation of former CEO Pat Gelsinger in January. Now Raghuram has found a place in the list of top CEOs of Indian descent. He is preceded in death by Sundar Pichai, CEO of Google, Arvind Krishna of IBM, Satya Nadella of Microsoft and Shantanu Narayan of Adobe.

“I am excited to see Raghuram as the CEO of VMware,” said Michael Dale, chairman of the VMware Board of Directors. He has been instrumental in the success of VMware throughout his career. He is now in a position to play a key role in the future of VMware, helping customers and partners in this multi-cloud world.

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Since joining VMware in 2003, Raghuram has helped shape the company’s direction and revolutionize technology. The company says it has been instrumental in expanding the virtualization business, setting policy on data centers, guiding the company’s cloud computing business, changing software services, as well as partnering with Dell Technology.

The VMware end-to-end software platform is poised to lead this multi-cloud computing world to transform the digital world of spanning clouds, data centers and customers, Raghuram said. Raghuram graduated from IIT-Bombay. Then in 1994 he went to Wharton to do his MBA. After a brief stint at Bang Networks and Netscape, he joined VMware in August 2003.

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Meanwhile, Punen has also graduated from IIT-Bombay. He has also worked for Microsoft, Apple, Symantec and SAP.

Paul Sagan, one of the directors of VMware, said that after a thorough and thoughtful decision, the board decided that Raghuram was the right person for the position of CEO of the company. They reflect the value of the company and have a clear vision for the future of the company. We thank Zen Rowe for his role as interim CEO. Also, they will be working as CFOs.

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