Chinese researchers develop amphibious ‘flying fish’ drone
Researchers have developed a prototype of a quadrotor that can both fly in the air and swim underwater, making it suitable for a wide range of applications.
Dubbed TJ-FlyingFish, the aerial-aquatic quadrotor weighs 1.63 kg with a wheelbase of 380 mm.
It adopts special designs in the propulsion and thruster configuration to cope with different fluid properties of water and air, making it capable of hovering in the air for six minutes or swimming underwater for about 40 minutes.
“For propulsion, the operating range is switched for the different mediums by the dual-speed propulsion unit, providing sufficient thrust and also ensuring output efficiency. For thruster configuration, thrust vectoring is realized by the rotation of the propulsion unit around the mount arm, thus enhancing the underwater maneuverability,” said the researchers.
The quadrotor is equipped with a cross-domain positioning and navigation system consisting of GPS, inertial measurement unit, depthmeter and mini Doppler velocity log, which enables autonomous control during its amphibious journey.
TJ-FlyingFish was jointly developed by a team of scientists from the Shanghai Research Institute for Intelligent Autonomous Systems under the Tongji University and the Chinese University of Hong Kong.
Possible applications include resource exploration, search and rescue missions, and engineering inspections.
Source(s): Xinhua, CGTN
U.S. FDA rejects Elon Musk’s Neuralink to test brain chips in humans
Elon Musk once said his brain implant company, Neuralink, will make the paralyzed walk, the blind see and eventually turn people into cyborgs, however, the firm is still struggling to get clinical-trial approval to achieve such a goal.
On at least four occasions since 2019, Musk has predicted that his medical device company, Neuralink, would soon start human trials of a revolutionary brain implant to treat intractable conditions such as paralysis and blindness.
Yet the company, founded in 2016, didn’t seek permission from the U.S. Food and Drug Administration (FDA) until early 2022, and the agency rejected the application, Reuters reported citing seven current and former employees.
In explaining the decision to Neuralink, the agency outlined dozens of issues the company must address before human testing, a critical milestone on the path to final product approval, the staffers said.
The agency’s major safety concerns involved the device’s lithium battery; the potential for the implant’s tiny wires to migrate to other areas of the brain; and questions over whether, and how the device can be removed without damaging brain tissue, the employees said.
A year after the rejection, Neuralink is still working through the agency’s concerns. Three staffers said they were skeptical the company could quickly resolve the issues, despite Musk’s latest prediction at a November 30 presentation that the company would secure FDA human-trial approval this spring.
Such FDA rejections do not mean a company will ultimately fail to gain the agency’s human-testing approval. But the agency’s pushback signals substantial concerns, according to more than a dozen experts, in FDA device-approval processes.
Report: How the U.S. seeks to maintain its technological hegemony
The U.S., the world’s leading technology superpower, has been wielding monopoly power and taking suppression measures in high-tech fields to maintain its technological hegemony, said a report released on Monday.
Most recently, the U.S. has been lobbying its allies, including the Netherlands and Japan, to further restrict export of microchips and related equipment and technology to China.
ASML, the world’s top supplier of chip-making machines based in the Netherlands, has already been banned from selling its most advanced chip-making equipment to China since 2019, because of curbs imposed by the Dutch government under pressure from the U.S.
The company warned last week that “the drive for technological sovereignty” could lead to “long-term changes in global trade, competition and technology supply chains,” which could adversely affect its business and growth prospects.
This is only the latest move by the U.S. to further strangle China’s chip industry.
Last year, the Biden Administration proposed the so-called “Chip 4 Alliance,” which includes four of the world’s top producers of semiconductors: the U.S., Japan, Korea and China’s Taiwan region. It is widely seen as Washington’s effort to contain Beijing in the cutting-edge sector.
How the U.S. suppressed Japan’s chip industry
Actually, China has not the only country targeted by the U.S. in the semiconductor sector.
In the 1980s, Japan, one of the U.S.’s closest allies, once produced about half of the world’s semiconductors. In the year 1990, six of the world’s top ten semiconductor manufacturers were Japanese companies.
In order to contain Japan’s semiconductor industry, the U.S. launched the “301” investigation, threatened to label Japan as conducting unfair trade, and imposed retaliatory tariffs, forcing Japan to sign the U.S.-Japan Semiconductor Agreement.
As a result, Japanese semiconductor enterprises were almost completely driven out of global competition, and their market share dropped from 50 percent to 10 percent.
In the same time, with the support of the U.S. government, a large number of U.S. semiconductor enterprises took the opportunity and grabbed larger market share.
U.S. put over 1,000 Chinese firms on sanction list
Now, facing competition from Chinese tech companies, the U.S. has been overstretching the concept of national security and mobilizing state power to suppress and sanction Chinese companies, like telecom giant Huawei – a leading company in 5G technologies.
Over the past years, the U.S. has restricted the entry of Huawei products into the American market, cut off its supply of chips and operating systems, and also coerced other countries to ban Huawei from undertaking local 5G network construction.
It even talked Canada into unwarrantedly detaining Huawei’s CFO Meng Wanzhou for nearly three years.
As a matter of fact, the U.S. has fabricated a slew of excuses to clamp down on China’s high-tech enterprises with global competitiveness, and has put more than 1,000 Chinese enterprises on its sanction lists.
The U.S. has also been abusing its technological hegemony and carrying out widespread cyber-attacks and eavesdropping, the report pointed out.
The world’s No.1 superpower, with the most advanced technologies, has long been notorious as an “empire of hackers,” blamed for its rampant acts of cyber theft around the world.
And U.S. surveillance is indiscriminate. All can be targets of its surveillance, be they rivals or allies, even leaders of allied countries such as former German Chancellor Angela Merkel and several French Presidents.
Cyber surveillance and attacks launched by the U.S. such as “Prism,” “Dirtbox,” “Irritant Horn” and “Telescreen Operation” are all proof that the U.S. is closely monitoring its allies and partners.
Julian Assange, the founder of Wikileaks, a website that has exposed U.S. surveillance programs, said that “do not expect a global surveillance superpower to act with honor or respect. There is only one rule: there are no rules.”
Small unknown asteroid accidentally detected by Webb telescope
European astronomers using the James Webb Space Telescope have detected a previously unknown asteroid about the size of Rome’s Colosseum in the main asteroid belt between Mars and Jupiter.
The asteroid measuring between 100 and 200 meters in length is suspected to be the smallest object observed to date using the telescope, the U.S. space agency NASA said Monday.
The European astronomers “serendipitously detected” the asteroid, NASA said in a statement, adding that more observations would be needed to better characterize its nature and properties.
“We – completely unexpectedly – detected a small asteroid,” said Thomas Muller, an astronomer at the Max Planck Institute for Extraterrestrial Physics in Germany.
It was detected during calibration of the telescope’s Mid-InfraRed Instrument (MIRI), which operates in mid-infrared wavelengths.
“Webb’s incredible sensitivity made it possible to see this roughly 100-meter object at a distance of more than 100 million kilometers,” Muller said.
Webb, which has been operational since July, is mainly built to study the life cycle of stars. Another main research focus is on exoplanets, planets outside Earth’s solar system.
Webb was not designed to look for small objects such as the newly discovered asteroid, but Muller said its discovery “suggests that many new objects will be detected with this instrument.”
Source(s): AFP & CGTN
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