China’s New Space Reactor ‘Will Be 100 Times More Powerful Than a Similar Device NASA Plans To Put on the Surface of the Moon by 2030’

Hmmmmmm writes: China is developing a powerful nuclear reactor for its moon and Mars missions, according to researchers involved in the project. The reactor can generate one megawatt of electric power, 100 times more powerful than a similar device Nasa plans to put on the surface of the moon by 2030. The project was launched with funding from the central government in 2019. Although technical details and the launch date were not revealed, the engineering design of a prototype machine was completed recently and some critical components have been built, two scientists who took part in the project confirmed to the South China Morning Post this week.

To China, this is an ambitious project with unprecedented challenges. The only publicly known nuclear device it has sent into space is a tiny radioactive battery on Yutu 2, the first rover to land on the far side of the moon in 2019. That device could only generate a few watts of heat to help the rover during long lunar nights. Chemical fuel and solar panels will no longer be enough to meet the demands of human space exploration, which is expected to expand significantly with human settlements on the moon or Mars on the agenda, according to the Chinese researchers. “Nuclear power is the most hopeful solution. Other nations have launched some ambitious plans. China cannot afford the cost of losing this race,” said one researcher with the Chinese Academy of Sciences who asked not to be named as they were not authorised to speak to the media.

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Inside the Rise and Fall of Clubhouse, a Pandemic Poster Child of VC-backed Hype

From a report: In May 2020, when the pandemic raged, the comedian and TV writer Marlena Rodriguez got an invite to a new app called Clubhouse that offered the homebound online masses a way to spend some of their suddenly abundant time. In the ensuing months, Rodriguez jousted in a chat room with the celebrity Ashton Kutcher, gained more than 13,000 followers, and started a party room on Fridays that frequently swelled to over 1,000 people. She wrote a play, “Once Upon a Clubhouse,” and hired actors to perform it on the app. “I was in love,” she said. Today, “I question why I’m even still on Clubhouse,” Rodriguez said. Her Friday-night room has dwindled to about 30 people.

More than any other startup, Clubhouse epitomizes the venture-capital-backed euphoria that swept the tech industry since lockdowns shut millions of people inside and pushed them online for connection, entertainment, and information. Marc Andreessen has called the app “the Athenian agora come to life,” referring to the hub of democracy in ancient Greece. It has raised more than $100m from his firm and other top VCs, garnering a $4bn valuation. But with vaccinations rising and more people returning to normal life, Clubhouse has been hit particularly hard. Daily downloads of the app have plunged more than 90% since a peak in June, while daily average users are down almost 80% since February, Apptopia data indicated. Insider interviews with creators, advertisers, VCs, and others in the tech industry show a platform struggling to build an audience and keep it. Moneymaking opportunities are also slim, which makes the app a tough sell for creators and users as there are many other options online and off.

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California Moves To Recommend Delaying Algebra To 9th Grade Statewide

California is in the process of approving new guidelines for math education in public schools that “pushes Algebra 1 back to 9th grade, de-emphasizes calculus, and applies social justice principles to math lessons,” writes Joe Hong via the San Francisco Standard. The new approach would have been approved earlier this month but has been delayed due to the attention and controversy it has received. Here’s an excerpt from the report: When Rebecca Pariso agreed to join a team of educators tasked in late 2019 with California’s new mathematics framework, she said she expected some controversy. But she didn’t expect her work would be in the national spotlight. […] Every eight years (PDF), a group of educators comes together to update the state’s math curriculum framework. This particular update has attracted extra attention, and controversy, because of perceived changes it makes to how “gifted” students progress — and because it pushes Algebra 1 back to 9th grade, de-emphasizes calculus, and applies social justice principles to math lessons. San Francisco pioneered key aspects of the new approach, opting in 2014 to delay algebra instruction until 9th grade and to push advanced mathematics courses until at least after 10th grade as a means of promoting equity.

San Francisco Unified School District touted the effort as a success, asserting that algebra failure rates fell and the number of students taking advanced math rose as a result of the change. The California Department of Education cited those results in drafting the statewide framework. But critics have accused the district of using cherry-picked and misleading assertions to bolster the case for the changes. The intent of the state mathematics framework, its designers say, is to maintain rigor while also helping remedy California’s achievement gaps for Black, Latino and low-income students, which remain some of the largest in the nation. At the heart of the wrangling lies a broad agreement about at least one thing: The way California public schools teach math isn’t working. On national standardized tests, California ranks in the bottom quartile among all states and U.S. territories for 8th grade math scores.

Yet for all the sound and fury, the proposed framework, about 800-pages long, is little more than a set of suggestions. Its designers are revising it now and will subject it to 60 more days of public review. Once it’s approved in July, districts may adopt as much or as little of the framework as they choose — and can disregard it completely without any penalty. “It’s not mandated that you use the framework,” said framework team member Dianne Wilson, a program specialist at Elk Grove Unified. “There’s a concern that it will be implemented unequally.”

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New Windows Zero-Day With Public Exploit Lets You Become An Admin

A security researcher has publicly disclosed an exploit for a new Windows zero-day local privilege elevation vulnerability that gives admin privileges in Windows 10, Windows 11, and Windows Server. BleepingComputer reports: As part of the November 2021 Patch Tuesday, Microsoft fixed a ‘Windows Installer Elevation of Privilege Vulnerability’ vulnerability tracked as CVE-2021-41379. This vulnerability was discovered by security researcher Abdelhamid Naceri, who found a bypass to the patch and a more powerful new zero-day privilege elevation vulnerability after examining Microsoft’s fix. Yesterday, Naceri published a working proof-of-concept exploit for the new zero-day on GitHub, explaining that it works on all supported versions of Windows.

“This variant was discovered during the analysis of CVE-2021-41379 patch. the bug was not fixed correctly, however, instead of dropping the bypass,” explains Naceri in his writeup. “I have chosen to actually drop this variant as it is more powerful than the original one.” Furthermore, Naceri explained that while it is possible to configure group policies to prevent ‘Standard’ users from performing MSI installer operations, his zero-day bypasses this policy and will work anyway. BleepingComputer tested Naceri’s ‘InstallerFileTakeOver’ exploit, and it only took a few seconds to gain SYSTEM privileges from a test account with ‘Standard’ privileges, as demonstrated in [this video]. When BleepingComputer asked Naceri why he publicly disclosed the zero-day vulnerability, we were told he did it out of frustration over Microsoft’s decreasing payouts in their bug bounty program. A Microsoft spokesperson said in a statement: “We are aware of the disclosure and will do what is necessary to keep our customers safe and protected. An attacker using the methods described must already have access and the ability to run code on a target victim’s machine.”

Naceri recommends users wait for Microsoft to release a security patch, as attempting to patch the binary will likely break the installer.

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Rolls-Royce’s All-Electric Airplane Reached a Record 387.4 MPH Top Speed

Rolls-Royce has announced that its all-electric plane, dubbed the “Spirit of Innovation,” is the fastest of its kind in the world after it reached a maximum speed of 387.4 mph (623 k/h) in recent flight tests. Gizmodo reports: In a recent news release, the company, not to be mistaken for the car company owned by BMW, claimed that the Spirit of Innovation set three new world records earlier this week. On flight tests carried out on Nov. 16, Rolls-Royce said its aircraft reached a top speed of 345.4 mph (555.9 km/h) over 1.8 miles (3 kilometers), exceeding the current record by 132 mph (213 k/h). It broke another record in a subsequent 9.3-mile (15 kilometer) flight, during which it reached 330 mph (532.1 km/h), surpassing the current record by 182 mph (292.8 km/h).

The Spirit of Innovation didn’t stop there, though. Rolls-Royce affirms that it smashed another record when it reached 9,842.5 feet (3,000 meters) in 202 seconds, beating the current record by 60 seconds. In the company’s view, it also took the title of the world’s fastest all-electric vehicle when it reached a maximum speed of 387.4 mph (623 km/h) during its flight tests. The company’s aircraft is powered by a 400kW electric powertrain and “the most power-dense propulsion battery pack ever assembled in aerospace.” “Following the world’s focus on the need for action at COP26, this is another milestone that will help make ‘jet zero’ a reality and supports our ambitions to deliver the technology breakthroughs society needs to decarbonize transport across air, land and sea,” CEO Warren East said in the news release.

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