bewaretheirs
Joined 12 years ago
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Recent submissions
Comment · 2 years ago
Comment · 2 years ago
Most of the big TLDs have already converted to algo 13 -- .org is still lingering on algo 8, but .com, .net, .edu, .gov have all converted, so a lot of the DNS traffic is using smaller signatures already.
Changing the algorithm for the root is being studied - see for instance https://lists.icann.org/hyperkitty/list/[email protected]... ; I wouldn't be surprised to see an algo change as part of the next root key rollover.
Comment · 2 years ago
Well, my reading is that the corrective action was less "add redundant safeties" and more "have sufficient process controls in place to ensure you don't break the feedback loop during pipeline work".
One potential problem with a pressure relief valve as a safety is that it could turn into a flare/blowtorch if there is an ignition source nearby, which constrains where it can be located (and requires ongoing maintenance to ensure vegetation/etc., doesn't build up where it could get torched).
Comment · 2 years ago
As performed on the David Letterman show: https://www.youtube.com/watch?v=CLQ7xYnyIBQ
You can see a few shots of the Cuica -- the drum(!) that makes the high-pitched squeaky monkey noises.
And for fans of video game music: that song inspired this little bit from the 8-bit big band: https://www.youtube.com/watch?v=v6hJvSkVLXs
Comment · 2 years ago
Huh. I've owned a few manual-transmission cars over the years and they all disallowed this trick -- pressing the clutch would disengage cruise control just like a tap on the brakes.
Comment · 2 years ago
The NTSB final report on this accident is here:
https://www.ntsb.gov/news/events/Pages/2019-PLD18MR003-BMG.a...
Unfortunately the shutdown of go.usa.gov broke a bunch of links from that page, but the NTSB recommendations are summarized starting on page 33 (PDF page 44) of https://www.ntsb.gov/investigations/AccidentReports/Reports/...
But the recommendations to the gas company included:
> Review and ensure that all records and documentation of your natural gas systems are traceable, reliable, and complete. (P-18-7) (Urgent)
> Apply management of change process to all changes to adequately identify system threats that could result in a common mode failure. (P-18-8) (Urgent)
> Develop and implement control procedures during modifications to gas mains to mitigate the risks identified during management of change operations. Gas main pressures should be continually monitored during these modifications and assets should be placed at critical locations to immediately shut down the system if abnormal operations are detected. (P-18-9) (Urgent)
Edit to add:
This page has currently working links to the specific recommendations:
Comment · 2 years ago
Something similar was at work in the 2018 natural gas explosions in and around Andover, MA:
https://en.wikipedia.org/wiki/Merrimack_Valley_gas_explosion...
"According to the NTSB's preliminary report, customers in the accident area received gas from a low-pressure (0.5 psi) distribution network which, in turn, was fed from a high-pressure (75 psi) main pipeline via regulators controlled by sensors measuring pressure in the low-pressure pipes. At the time of the accident, workers were replacing some of the low-pressure piping, but the procedure set out by Columbia Gas for doing this failed to include transfer of a regulator's pressure sensor from the old, disused piping to the new. As a result, when the old pipe was depressurized, the regulator sensed zero pressure on the low-pressure side and opened completely, feeding the main pipeline's full pressure into the local distribution network."
Comment · 2 years ago
It's more likely that something energetic happened with an onboard system (propulsion or batteries). Could just be leaky valves causing propellant and oxidizer to meet somewhere they shouldn't..
It's had a few propulsion system issues:
> On 9 September 2016, Intelsat announced that due to a malfunction in the LEROS-1c primary thruster, it would require more time for orbit rising ...
> In August 2017, another propulsion issue appeared, leading to larger-than-expected propellant usage to control the satellite attitude during the north/south station keeping maneuvers. This issue reduced the orbital life-time by about 3.5 years.
Comment · 2 years ago
Odd that the article makes no mention of intel's APX extensions (which add more integer registers, 3-operand variants of most 2-operand instructions, and assorted other tweaks).
Comment · 2 years ago
According to their web site at https://kairospower.com/technology/ it uses a molten fluoride salt based coolant but unlike the MSR/LFTR designs the fissionable fuel is not dissolved into the coolant; instead, the Kairos reactor design puts the fissionables in pellets that are intended to remain solid while in operation; it looks more like a pebble-bed reactor than a MSR/LFTR.
Comment · 2 years ago
Main difference (besides scale) is that the booster is cooperating with the chopsticks, navigating to hover at a point between the arms.
Comment · 2 years ago
In August, they said the rocket was ready to fly .. but they were quite visibly still doing significant work to the catch mechanism on the launch tower.
Comment · 2 years ago
The water deluge system has been in operation for all launches save the first and has been functioning well, protecting the pad from damage. It uses drinking-quality water and outflow has been sampled after each launch, with negligible traces of contaminants detected.
There was a disagreement between the Texas Commission on Environmental Quality and the US EPA about the specific type of permit that SpaceX needed from TCEQ for the deluge system but that was a paperwork/documentation issue only.
see:
Comment · 2 years ago
First attempt to catch the booster back at the launch site.
The "mechazilla" launch tower has two "chopstick" arms which are used to pick up and stack both stages and which are intended to be able to catch the returning booster and maybe also the returning Starship upper stage.
Comment · 2 years ago
Not much different from the prior flights.
Flight 4 was licensed on June 4th, was originally scheduled to launch on June 5th, and actually launched on the 6th.
Flight 3 received its license on March 13th and launched on March 14th.
Flight 2 received its license on November 15th 2023, and launched on November 18th.
Flight 1 received its license on April 14th; it launched on April 20th.
Nintendo appears to make the musical elements of its work a priority and it's good to see it escaping the game console into live performance -- following in the footsteps of both show tunes and movie music..