jgibson · HackerTrans

vor 7 Jahrendiscuss

I've been thinking about this more and more, and it just makes so much sense. No one cares what shape a beer bottle is, the label is enough to tell them apart. Marketing people will complain if they can't differentiate on packaging, but less of them isn't something to worry about either

jgibson

vor 7 Jahrendiscuss

It's not just ram that we care about, its all the other CPU caches that are significantly smaller that a larger binary will take up more space in

jgibson

vor 7 Jahrendiscuss

Another side of the organizational improvements that batteries have: redeployable.

Underprovision? Pour some more concrete, truck a couple more batteries in.

Overprovision? Load em up again and resell them to someone who wants them. Can't quite do that with a gas plant.

Sure there will be some overhead lost, but it just make soooo much sense to go with battiers from a risk perspective.

jgibson

vor 7 Jahrendiscuss

The article claims: "In the cities of New Zealand and Australia, the convenience store is known as a milk bar"

As a native kiwi, I've never ever heard it called a "milk bar". Dairy is the more common term. What say you aussies?

jgibson

vor 7 Jahrendiscuss

Not that this makes the Bombardier problem trivial, but that seems fairly simple compared to most cars on the road today, which have over 100 micros. Software can be done well in complicated systems if you have the expertise, design, time and money to get it right.

jgibson

vor 7 Jahrendiscuss

Tesla Inc, USA | INTERNS (Fall 2019) | Vehicle Integration, Simulation or Automation Infrastructure | Palo Alto, CA | ONSITE

Chassis Controls Software (the smarts behind track mode [1], stability control [2] and more) is looking for an intern in the fall. We've got plenty of work to do in a number of roles:

- vehicle integration (systems engineering of multiple different ECUs in the car, interface design, a fair bit of in-vehicle work)

- simulation of ECU code in combination with physical models (C, C++, Rust, ODEs, high performance computing)

- automation and test infrastructure work (general CS, docker, python experience will help)

If you think your skills overlap with one or more of the above postings, email my hn username + company domain name if you think you fit the criteria.

[1] https://www.motortrend.com/cars/tesla/model-3/2019/tesla-mod... [2] https://www.instagram.com/p/Br5XllOH6rK/

jgibson

vor 7 Jahrendiscuss

Er, doesn't hashmap do pretty much the same thing? https://doc.rust-lang.org/std/collections/struct.HashMap.htm...

jgibson

vor 7 Jahrendiscuss

Think about it from a supply/configuration/logistics point of view. It might be cheaper to make 500k cars with 100% heated seats rather than 250k w/ heated and 250k w/o heated. Even if BOM cost is lower, the additional complexity due to the logistics and supply chain probably means it's more expensive to have both variants in production. That way people who want heated seats are subsidising the lower overall cost for those who don't. It also allows the next owner of the car to pay for that option at a later date if they want to. Almost every industry does this (there was a good case about oscilloscopes a while back, where the cheaper, lower bandwidth models just had a low-pass filter circuit installed).

jgibson

vor 7 Jahrendiscuss

Eye colour has a lot to do with how much light your retinas let in, iirc. Would this explain your sensitivity?

jgibson

vor 8 Jahrendiscuss

My info may be a little dated, but yes, most of these companies (Huawei, Ericsson, Alcatel-Lucent, etc) also provide network services and ops to run the network.

jgibson

vor 8 Jahrendiscuss

Note: Only email me if you are interested in the internship specifically!

jgibson

vor 8 Jahrendiscuss

Tesla | Interns | ONSITE | Palo Alto, CA, USA| VISA?

We're always hiring for pretty much any SW related roles (see the main website), but I'm after a bunch of self-starter interns to work on some projects we have coming up.

You'll get a single big-impact project over the course of your internship, working a lot with the low-level vehicle software, which is a great hands-on experience. Internships usually last 3-12 months, and can happen any time during the year.

Its stuff I'd like to be working on myself but don't have the time.

Skills I'm looking for include Docker/k8s, python, rust, c, sql/postgres, web services, maybe some front end (JS) work. You can email me directly at <HN_username>@<company_name>.com, and I'll forward you on to recruiting.

jgibson

vor 8 Jahrendiscuss

Electronically assisted, but still mechanically coupled for 99% of consumer cars. I've completely lost 12V on a car before and still managed to bring it safely to the side of the road.

Inifinity tried steer-by-wire but ended up retrofitting traditional hydraulic steering back.[1]

[1] https://en.wikipedia.org/wiki/Drive_by_wire

jgibson

vor 8 Jahrendiscuss

They are manual in the sense that there is a physical connection: the steering wheel is usually mechanically coupled with the steering rack, brakes usually through through hydraulics.

That said there are probably 5-20 systems in a car that can completely control these systems without any human input. Think of automatic emergency braking, traction control, vehicle stability control for the brakes, and autopark + powered steering for the steering.

Most of these systems have multiple redundancy and isolated monitors (eg, if autopark is on and the vehicle speed is > 10mph, the monitor will intervene) but there are still probably some theoretical situations where this could occur

comments