Glawen

44 ms·

481.
by Glawen 7y ago
The competitors must have known as well. They all buy competitors cars and disassemble them to reverse engineer the car. They probably also spotted the cheating device, and thought: ok the leading company is cheating, so do I.
482.
by Glawen 7y ago
Most probably wrong. Code and requirement tracability is mandatory when we do safety critical system. If you have an audit, they can pick a source file or even line of code and ask you to find why it was added and the associated requirement
483.
by Glawen 7y ago
Safety critical is by design simple, it is a requirement by the norms to ensure low complexity :)
484.
by Glawen 7y ago
Because you then need longer and heavier landing gear, which you need to fit somewhere in the plane as they retract. This is a ripple effect where you probably need to redesign the complete airframe, from fuselage to the wings. They actuall
485.
by Glawen 7y ago
I don't see how this would help, because the default behaviour in a computer software is to inform the user that an error occured, please press enter to continue. When you write software for a car, you always have to think about the im
486.
by Glawen 7y ago
So the idea is to make ecu in the vicinity to be responsible of the components, and drive them through communications. Nothing new, trucks are applying this technique already. The big drawback is that it increases SW and systems complexity.
487.
by Glawen 7y ago
Isn't 120v the norm in the US ? In France, every home has a three phase 400V coming from the utility, then you choose if you want single phase or three phase in your home.
488.
by Glawen 7y ago
Would you care to expand ? I know that there are architectural trick to improve the heat management, for example i plan to plant a tree which will grow big enough to make shade on my window during summer. But personally, I did not see yet a
489.
by Glawen 7y ago
Well that's the drawback, it is designed to keep the cold/heat outside the house, but once you let the heat inside in summer, you have a hard time to cool it down. It really is designed for winter. What i don't get in these r
490.
by Glawen 7y ago
France actually enforces a law whereby every new construction need to be well insulated (rt2012 at the moment). To give an idea, to comply to this rule you need at least 15cm of styrofoam on the outside walls of your house. The next rules
491.
by Glawen 7y ago
True, it is a constant compromise that the engine is doing at each injection. For the article, i think the journalists just didn't understand the explanation, and it is probably the simpler solution : they enabled the emission cleaning
492.
by Glawen 7y ago
They are not oblivious to what happens in tech. The firmware are encrypted and protected, it is not so easy, and they would need specialist for this. It is however much easier to do some social engineering or hire a bosch employee :). Merc
493.
by Glawen 7y ago
What will be the differentiation between cars then ? The car industry is highly competitive. The first cars introduced by a company are bought by competitors who tear them down to see how it is made. However, with SW, they are not sure how
494.
by Glawen 7y ago
The wsj has too few infos, however if you can read german, there are very detailed articles: https://www.sueddeutsche.de/auto/daimler-mercedes-glk-rueckr... As i understand it, the motor seemed to artificially open th
495.
by Glawen 7y ago
I'm surprised noone yet on HN mentionned how Rust would have avoided the failure :)
496.
by Glawen 7y ago
As a french, it seems perfectly normal to see Charles DE GAULLE. This convention comes from the bureaucracy in France, they usually write your family name in capital letter. By the way my company does the same, all our names are in capital
497.
by Glawen 7y ago
They are very similar in size or product. Aldi has more local food products than lidl, but lidl has a more interesting "aisle of shite", with their own brand of tools/garden equipment. I keep watching this aisle to expand my
498.
by Glawen 7y ago
My god, aldi/lidl and ikea are the worst shops in europe. I can't imagine a country filled with the same awful shops
499.
by Glawen 7y ago
Wow i didn't know that Aldi was in the US. Aldi and lidl keep opening stores like crazy in Europe, there must be like 15 of them in my city in France. They are great on price, and the high end product are actually nice. But the rest is
500.
by Glawen 7y ago
The biggest european tractor are case new holland (cnh) and claas. Then there are other in eastern europe and china, but not available in europe
501.
by Glawen 7y ago
The trick is to harden your back muscles, so that they hold your spine firmly in place. I had a spinal disc herniation 3 years ago, followed by back pain for a year after. Since a year, i have no more back problems, what helped is dead sim
502.
by Glawen 7y ago
You mean that the engineers quietly analyzed the test flight data and decided to increase the parameters on their own, so that the flight data show similarity between a MAX and a NG ? I find it so huge that it is hard to believe. Unless the
503.
by Glawen 7y ago
This makes no sense, we know that they increase the MCAS action range from 0.6° to 2.5° and they didn't inform FAA of the change. So, they must have told tests pilots about the feature, otherwise why did they change the parameters ?
504.
by Glawen 8y ago
Safety critical SW is done by following a strict and thorough process. It always begins with safety experts and systems engineers who will identify and classify the risks and determine what will be done to minimize the risk. The software en
505.
by Glawen 8y ago
Yes, Autosar enables the carmaker to develop code in house for their cars, but it still needs the suppliers for the HW and the controls of specialised parts like injectors, rpm or lambda sensors. The trend is for the carmaker to develop veh
506.
by Glawen 8y ago
I've read the audit and basically it was done by a guy with no clue about the automotive world. He compared the code with the one made at nas. In the end they indeed did not find the root cause, but they had to say something as they ar
507.
by Glawen 8y ago
And where would you store these logs ? I'm sure the engine stores its faults somewhere, but i'm not expecting more. You have to realise that you can run safety critical software on certified microcontrollers, which have usually li
508.
by Glawen 8y ago
Nope, not on safety critical software, the norms tells you that you need independence between the development team and the validation team.
509.
by Glawen 8y ago
Yes they generate c code which is compiled. I don't know if the model is formally verified, but the whole toolchain from esterel, including the library blocks are certified (aicraft, automitive, industrial and train safety levels) It d
510.
by Glawen 8y ago
There are some old bmw on the road, but there are more old mercedes. Mercedes is way more reliable than BMW. Then it depends on where you live. In my region east of France, you can see a lot of Peugeot 205 which last forever. If you live on

More ›