Quote from: MarcusA on June 03, 2023, 09:18:09 AMI must be really boring because I am loud and emotive.Actually, it's the dark and quiet types who tend to be on the boring side - unless of course they make up for it by being skilled conversationalists, for example.
QuoteNASA has revealed a six-day stretch during which it could not contact its Ingenuity Mars helicopter.
In a lengthy post, chief engineer Travis Brown explained that after the copter's 49th flight, radio contact was lost for six sols – just short of six days and six hours of terrestrial time.
Initially, NASA's Mars boffins weren't unduly concerned. The Perseverance Rover had moved behind a rocky outcrop that created a "communication shadow." Brown wrote that since Sol 685 the helicopter "had unfortunately been drifting in and out of night-time survival mode" which made daily contact with the craft difficult. So a day or two without contact wasn't worrying.
But once Perseverance moved to another location and Ingenuity still could not be found, Brown wrote "the situation began to generate some unease."
"Poor telecom performance was seen as a plausible explanation, but there were reasons to doubt it," he wrote. "In more than 700 sols operating the helicopter on Mars, not once had we ever experienced a total radio blackout. Even in the worst communications environments, we had always seen some indication of activity."
But the signal received on that day, sol 761, was just a simple ACK (acknowledgement). The next day, the copter again acknowledged a command, but did little else.
Mission staff determined that the ridge separating Ingenuity and Perseverance was a challenge for the copter's radio. It didn't help that Perseverance's helicopter base station (HBS) antenna is mounted low on the vehicle's right and is subject to occlusion effects.
[. . .]
With the rover on the move, and the helicopter stopped, it became imperative to get Ingenuity moving.
"Relying on the helicopter's onboard pre-flight checks to ensure vehicle safety and banking on solid communications from the rover's imminent proximity, the team uplinked the flight plan," Brown wrote.
Ingenuity did more than just ACK that upload. It ingested and executed it, resulting in its 50th flight and an altitude record of 18 meters.
"It would be an understatement to say that the helicopter team was relieved to see the successful flight telemetry in the Sol 763 downlink the following morning," Brown wrote.
But he added that anxious days lie ahead.
"It now appears that the dust covering our solar panel will ensure that Ingenuity will likely remain in this transitional power state for some time," he wrote. "This means that, much to the chagrin of her team, we are not yet done playing this high-stakes game of hide and seek with the playful little helicopter."
[Continues . . .]
QuoteIn February 2021, Musk said Neuralink was working with the FDA to secure permission to start initial human trials later that year. But human trials didn't commence in 2021.
Then, in March 2022, Neuralink made a further application to the FDA to establish its readiness to begin humans trials.
One year and three months later, on May 25 2023, Neuralink finally received FDA approval for its first human clinical trial. Given how hard Neuralink has pushed for permission to begin, we can assume it will begin very soon.
The approval has come less than six months after the US Office of the Inspector General launched an investigation into Neuralink over potential animal welfare violations.
The FDA had quite a list of issues that needed to be resolved before human trials could commence, as was reported in a Reuters investigation, which claimed to have spoken to several Neuralink sources.
Most of these concerns called for Neuralink to perform thorough and repeated testing and data collection over an extended period. This was likely a deciding factor in why the approval process to begin human testing took as long as it did.
It can't be said with certainty that all of the issues have been fully resolved. But considering the rigour of the FDA's approval process, we might conclude they have at least been resolved to a point of satisfaction for the FDA.
[Link to full article.]
Quote from: Icarus on June 04, 2023, 12:51:35 AMA fine example of mother natures ambition, Bluenose.
The density does not appeal to me for a hike in that forest. There may be drop bears, funnel webs, angry kangaroos, and all sorts of Antipodean hazards in there. It is beautiful nonetheless.