georgehm

>Effectively, eight CPUs run the flight software in parallel. The engineering philosophy hinges on a >“fail-silent” design. The self-checking pairs ensure that if a CPU performs an erroneous calculation >due to a radiation event, the error is detected immediately and the system responds.

>“A faulty computer will fail silent, rather than transmit the ‘wrong answer,’” Uitenbroek explained. >This approach simplifies the complex task of the triplex “voting” mechanism that compares results. > >Instead of comparing three answers to find a majority, the system uses a priority-ordered source >selection algorithm among healthy channels that haven’t failed-silent. It picks the output from the >first available FCM in the priority list; if that module has gone silent due to a fault, it moves to >the second, third, or fourth.

One part that seems omitted in the explanation is what happens if both CPUs in a pair for whatever reason performs an erroneous calculation and they both match, how will that source be silenced without comparing its results with other sources.

> Having two compilers helped ensure that the language was clearly defined.

> When the two compilers differed, we knew that we had to clarify the spec and figure out what the right behavior should be.

This idea of having two implementations for spec stood out for me.

Maybe I am being foolishly optimistic, the section in the video (~ 4:50) where it is mentioned that some giant seed corporation is staying the course betting that this thing will blow over in a quarter or so actually gives me some hope ?

promptly ordered 2 (an HD and 4K) .. its still cheaper than the new "AI" enabled experience ..

I am super curious to know what kind of software magic they did to bring the NDL system as the primary navigation system after their own system failed to function prior to landing .. From what I understood listening in to the broadcast, NDL was only a demonstration project and folks somehow managed to bring it up on demand and use 2 of the sensors on it (?) iirc .. Like how !? Was NDL set up in the same orientation as their original system ? If not, they updated their guidance system on the fly too !?? Simply amazing

No they didn’t because until the loan is repaid you can’t use whatever gold you put up for other purposes can you. What became tangible is what you used the loan for , that is what can be taxed.

Why? Here the asset used as collateral is a commitment to return the money if the loan isn’t repaid. Imagine I bought gold back when gold was 100$ , it’s current price is 1000$ and now I use it as collateral to get a loan . How is it fair that I have to pay taxes on 900$ of unrealized gains ?