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Lightweight solar-powered drones promise indefinite flight | The Express Tribune

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BEIJING:

A drone weighing just 4 grams has become the smallest solar-powered aerial vehicle to take flight, owing to its innovative electrostatic motor and miniature solar panels that generate extremely high voltages. Although the hummingbird-sized prototype only flew for an hour, its creators believe their method could lead to insect-sized drones capable of indefinite flight.

The solar-powered machine was designed by researchers at Beihang University in Beijing, known for their expertise in aeronautical and astronautical research. The size and weight are now only 1/10 and 1/600 of the previous world’s smallest and lightest solar-powered aircraft, respectively.

Micro aerial vehicles have a host of applications, from environmental monitoring to search and rescue, making them versatile tools. They can perform specialized tasks such as capturing images, detecting objects, and transporting items in confined spaces. However, limited flight duration poses a significant obstacle to their usefulness.

Traditional micro aerial vehicles use electromagnetic motors to power their rotors. However, a major problem always arises when the small motor overheats at high speeds, causing a sharp drop in energy conversion efficiency. Natural sunlight can be a potential alternative as an energy source, but the smaller a drone gets, the less surface area it has to collect sunlight, which ultimately can generate a limited amount of energy, lead researcher Qi Mingjing explained.

In the study, published in the journal Nature on Thursday, the research team highlighted that traditionally, flying machines weighing less than 10 grams can only stay aloft for up to 10 minutes.

To overcome the efficiency challenges, Qi and his colleagues developed an electrostatic motor that uses the Coulomb force, the force between electrically charged particles at rest, to generate continuous rotating motion. The drone’s name, CoulombFly, also comes from this unique motor.

A demonstration video presented by the researchers showed that the motor works by creating a circle of electric charges, which generates a twisting force to make a single blade spin like those on a helicopter.

The advantage of such a motor is that it can effectively reduce heat, co-author Peng Jinzhe said. “This is because static electricity operates at high voltage and low current. The lower the current, the less heat it generates.”

The energy conversion efficiency of flying machines weighing less than five grams and powered by such static electricity could exceed 10 times that of traditional electromagnetic motors, with less than one-tenth of the power consumption required for the same lift, according to the study.

Read: New quadcopter tech allows drones to recharge on power lines

Prior to this breakthrough, Harvard University researchers published a paper in Nature in 2019 introducing the Robobee aircraft they developed, that was once considered the highest level in the field of micro aerial vehicles. However, it relied on an artificial light source, equivalent to three times the intensity of natural sunlight for sustained flight.

The new drone CoulombFly can achieve continuous flight solely relying on natural light, representing a significant leap forward, the researchers said.

After further development, the new drone motor technology is expected to be applied in emergency rescue operations, narrow space detection and other similar scenarios, said Professor Yan Xiaojun, one of the lead researchers of the study.

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SpaceX achieves unprecedented feat in commercial space travel | The Express Tribune

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WASHINGTON:

Two astronauts, a billionaire and an engineer, completed the first private spacewalk in orbit on Thursday outside a SpaceX capsule. They wore a new type of spacesuit in a high-risk feat once limited to astronauts from government space agencies.

As part of the Polaris Dawn mission, the astronauts each spent about 10 minutes outside the Crew Dragon capsule, tethered for safety, while their two crewmates remained inside. The mission, led by Elon Musk’s SpaceX, further pushed the boundaries of private space travel.

Jared Isaacman, a pilot and founder of Shift4, was the first to exit, followed by SpaceX engineer Sarah Gillis. Meanwhile, their crewmates Scott Poteet and Anna Menon observed from inside the capsule. Orbiting about 450 miles (730 km) above Earth, the entire spacewalk lasted one hour and 46 minutes.

Isaacman, who also funded the Polaris mission, previously financed his Inspiration4 flight with SpaceX in 2021. The mission, streamed live on SpaceX’s website, tested new equipment, including slimmer spacesuits and a procedure to fully depressurise the Crew Dragon cabin – technology that Musk aims to refine for future private missions to Mars.

After re-entering the spacecraft, Isaacman commented on Earth’s beauty, as seen from space. This mission was one of the riskiest for SpaceX, the only private company capable of regularly sending people into orbit and back.

Before the spacewalk at around 10:52 GMT, the capsule was completely depressurised, with the astronauts relying on their SpaceX-designed spacesuits for oxygen via an umbilical connection to the capsule. Isaacman, 41, and Gillis, 30, tested the suits’ flexibility and provided feedback to improve future designs.

The mission aimed to push the limits of private companies in space, with ground teams at SpaceX’s California headquarters monitoring the hatch’s closure and carrying out safety checks as the astronauts returned inside.

The spacewalk procedure echoed that of the first US spacewalk in 1965, which involved depressurising the capsule and tethering a spacesuited astronaut to it. NASA Administrator Bill Nelson hailed the mission as a “giant leap forward” for the commercial space industry and NASA’s goal of building a sustainable US space economy.

While Isaacman has not revealed the mission’s cost, it is expected to run into hundreds of millions, with Crew Dragon seats typically costing around $55 million each.

Gillis, who joined SpaceX as an intern in 2015, and Poteet, a retired US Air Force lieutenant colonel, were among the crew, along with SpaceX engineer Anna Menon. Throughout the mission, the spacecraft circled Earth multiple times, reaching altitudes of up to 1,400 km, the farthest humans have travelled in space since Apollo’s final mission in 1972.

Spacewalks have previously been conducted solely by government-trained astronauts. Since the International Space Station (ISS) was established in 2000, there have been around 270 spacewalks, with 16 on China’s Tiangong space station.

The Polaris crew spent two and a half years training, including mission simulations and challenging real-world experiences, to prepare for the mission, according to Poteet.

Currently, a record 19 astronauts are in orbit, including 12 aboard the ISS, after a Russian Soyuz mission transported additional astronauts there on Wednesday. Since 2001, Crew Dragon has completed more than a dozen astronaut missions, primarily for NASA.

The capsule was developed under a NASA programme to create commercial vehicles for transporting astronauts to and from the ISS. Boeing’s Starliner capsule, also part of this programme, launched its first astronauts to the ISS in June but faced difficulties. It returned empty, leaving its crew aboard the station until next year, when a Crew Dragon capsule will retrieve them.

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PS5 Disc Drive is selling out after PS5 Pro announcement | The Express Tribune

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The demand for the PS5 Disc Drive has skyrocketed since the announcement of the PS5 Pro, with online retailers quickly selling out of the popular peripheral.

Gamers eager to ensure they can still play physical media on their next-gen consoles are rushing to purchase the external disc drive required for the new PS5 Pro.

Sony officially revealed the PS5 Pro earlier this week, and with it came the announcement that the console would not include a built-in disc drive.

Instead, players who want to use physical discs will need to buy the external PS5 Disc Drive, a shift that has already sparked a buying frenzy.

At the time of writing, the PS5 Disc Drive has climbed to #16 on Amazon’s best-selling video game products.

Best Buy, one of the major online retailers, has already sold out of the drive, and it is currently unavailable for order. Gamers are still able to find it on other major sites like Target, Walmart, and PlayStation Direct, but these supplies are expected to diminish quickly as well.

This rush to secure the PS5 Disc Drive began when Sony introduced the PS5 Slim in late 2023, which also required an external drive for physical game compatibility. Unlike the original PS5, which featured both disc and digital editions, the Slim removed the option of having a built-in disc drive.

 

 

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US wireless data usage surges to record 100 trillion MB in 2023 | The Express Tribune

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Americans consumed more than 100 trillion megabytes of wireless data in 2023, a 36% rise from the previous year and the largest single-year increase, according to a report from wireless industry association CTIA.

The surge in usage—an increase of 26 trillion MB over 2022—is attributed to the growing adoption of 5G devices and fixed wireless access (FWA) broadband services.

The total number of wireless connections in the US rose to 558 million, representing a 6% growth over 2022. Notably, 40% of wireless connections were 5G-enabled, covering over 330 million US residents.

Additionally, nearly 40% of all wireless devices were connected to 5G, a 34% increase from 2022.

CTIA highlighted that the sector attracted $30 billion in investment in 2023, with total spending on spectrum auctions surpassing $233 billion.

However, the association emphasized the need for Congress to restore the Federal Communications Commission’s (FCC) auction authority to ensure access to mid-band spectrum and meet the growing demand for wireless services.

By the end of 2023, the US had 432,469 active cell sites, a 24% increase since 2018, thanks to siting reforms.

The cost per megabyte of wireless data has dropped by 50% since 2020.

CTIA’s annual survey has tracked the US wireless sector since 1985.

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Black Sun Productions to launch VR game inspired by Kafka’s Metamorphosis | The Express Tribune

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Black Sun Productions, a virtual reality studio, has announced its debut title, Metamorphosis VR, will launch on October 10, 2024.

The narrative inspired by Franz Kafka’s The Metamorphosis will be available for Meta Quest 2 and 3.

This VR game offers a unique and immersive experience, allowing players to step into the surreal world of Kafka’s renowned novella.

Metamorphosis VR is a bold reimagining of the 2020 PC game Metamorphosis, originally developed by Ovid Works and Untold Tales.

The story takes place in early 1900s Vienna, following Gregor Samsa, a traveling salesman who undergoes a shocking transformation into a cockroach.

After a night out, Gregor awakens to discover his metamorphosis and embarks on a strange journey to find a way to return to his human form and save his closest friend.

“We chose Metamorphosis as our debut title for Black Sun because its surreal, Kafkaesque world – some of the richest and most immersive environments imagined – offers a perfect opportunity to bring this extraordinary experience to virtual reality,” said Corbin Chase, CEO of Black Sun Productions, in a statement, as reported by VentureBeat.

“One of VR’s most powerful abilities is how it changes our perspective and sense of scale, and Metamorphosis uniquely combines confusion, bewilderment, wonder and beauty. All imparted by that shift in perspective, it feels like this game was always meant for VR.”

One of the game’s key highlights is its distinct shift in perspective, which allows players to experience Gregor’s new reality as an insect.

Navigating through walls, floorboards, and tight spaces, the player is immersed in a bizarre world filled with bug philosophers, insect crime bosses, and creepy thespians.

The game features over 100 insect characters, each with a unique voice, contributing to an interactive experience.

Fans of Kafka’s original novella and virtual reality enthusiasts eager to explore its surreal world are anticipating the game’s October 10 release on Meta Quest 2 and 3.

 

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