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EngineerBetter

717 karma · joined August 18, 2015

https://github.com/DanielJonesEB/
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EngineerBetter··on More than 94% of net new electricity capacity in the USA from renewables in 2017
The seas around the British Isles, which the poster is talking about, are _always_ windy. Plus this can be mitigated with the battery storage the post you replied to mentioned and solar - it's unlikely to be both still and overcast.
EngineerBetter··on [dead]
Or activate the microphone, and send the recording to a speech-interpreting API to see if the user has correctly recited "I'm not a pheasant plucker, I'm a pheasant plucker's son, and I'm only plucking pheasants until the pheasant plucker comes"?
EngineerBetter··on [dead]
This is probably not as useful as it might be unless accompanied by some sort of mobile phone breathalizer widget.
EngineerBetter··on Diabetes drug 'significantly reverses memory loss' in mice with Alzheimer's
I bought and read Matthew Walker's book Why We Sleep (which is referred to in PP's thirs reference) and would thoroughly recommend it to all humans. I now take some solace in my grumpiness when tired having a biological explanation.
EngineerBetter··on A personal ode to the Boeing 747
This is not an ode.

https://en.wikipedia.org/wiki/Ode

An ode is not a tribute, it is a particular form of verse. I guess people get confused because the word sounds like "owed", or something.

EngineerBetter··on Coinbase says buying and selling temporarily disabled amid price rout
Great question. I bought into BTC in 2011, not using an exchange. I'm wondering how much of a pain it'll be when I eventually want to sell them.
EngineerBetter··on How Does the Flu Kill People?
Why do so many US articles sound like a story frim Grandpa Simpson?

"It was a cold Wednesday, with the wind blowing from the north..."

I'm curious if this is commonplace, and if its native audience find it irksome in the online medium. I can understand this style in print, but very often I click an HN link, and hit back before finishing the first paragraph as it becomes clear the article is not written in the pyramid style.

EngineerBetter··on Hotbed of Misinformation
"n-word" is used in the UK too.

Sometimes one needs to be specific about the nature and severity of the slur used.

EngineerBetter··on Does anyone remember websites?
I remember websites, and I remember that some were made by women, too. The author seems to have only read websites made by men.
EngineerBetter··on Ask HN: What alternatives to Powerpoint/Prezi are there?
+1 for reveal.js. I use it for several professional training courses that we deliver, as well as conference presentations.

Given that it's HTML/Markdown, it's great to use in a team with version control. I know folks that have extended it to allow SVG animations.

EngineerBetter··on We fired our top talent. Best decision we ever made
Pair-programming greatly reduces the risk of this situation arising.
EngineerBetter··on NTSB: Tesla’s Autopilot UX a “major role” in fatal Model S crash
I've seen Autopilot 2 fail to notice cyclists. But then, it's designed for use on large, fast roads, rather than city streets.

I cycle through the streets of London every day, BTW, so I'm not suggesting that it's lack of recognition ability is a good thing.

EngineerBetter··on NTSB: Tesla’s Autopilot UX a “major role” in fatal Model S crash
If you use Autopilot for any length of time and believe that you don't need to be paying attention, then I'd suggest that you're responsible for whatever fate befalls you.

Autopilot 2 keeps you in lane, does traffic-aware cruise control, and can do lane changes. That's it. No more, no less.

It sometimes gets spooked by shadows. I've had it brake sharply when going under bridges on the motorway, because of the shadow on the road. I've had it mis-read lane markers (in understandable circumstances; the old lines had been removed but the marks they left still contrasted with the tarmac).

If anything, I find Autopilot 2 to require too much hand-holding - literally! I rest my right hand gently on the bottom-right of the wheel when Autopilot is engaged, resting my wrist on my knee, which is also how I drive regular cars on the motorway. This isn't enough for Autopilot to think I've got my hands on the wheel, so it's constantly bugging me, and I have to wiggle the wheel to tell it I'm there.

Apparently some Model 3s have been seen with driver-facing cameras. Eye-tracking seems like a much better solution to me.

I love Autopilot. I recently had to drive ~500 miles on motorways in a thing that explodes ancient liquidised organic matter, and it was an absolute chore. Autopilot is ace when used as intended, and great in traffic jams.

EngineerBetter··on Mercedes-Benz will electrify its entire car lineup by 2022
I've also got a Mercedes loan car, after a truck ripped the front off my Model X 90D.

The Mercedes S 350 is so much more sluggish than either my Model X or my Renault Zoe. Put foot down, wait half a second, and make a ridiculous noise in the process. I have to use the brakes way more often because of the lack of regen, too.

I am utterly convinced after 4 years of EV driving that 90% of drivers would switch to EVs for life, if they got to try one for a few weeks.

Driving the Merc feels like using an HTC Vario compared to an iPhone.

EngineerBetter··on Chinese government is working on a timetable to end sales of fossil-fuel cars
Teslas also come with a domestic charge adaptor, in case you really have to use it. As you point out, it takes a very long time - something like 25 hours for 90kWh battery.
EngineerBetter··on Chinese government is working on a timetable to end sales of fossil-fuel cars
How old is the linked article? China appears to doubling its solar power capacity every year:

https://en.wikipedia.org/wiki/Solar_power_in_China

also:

https://youtu.be/T4LheD1l2c4?t=723

EngineerBetter··on Chinese government is working on a timetable to end sales of fossil-fuel cars
There are no production EVs to my knowledge that allow a battery swap. Renault tried it with the Fluence in Israel, and discontinued that approach.
EngineerBetter··on Chinese government is working on a timetable to end sales of fossil-fuel cars
It does not take two hours to charge your car at a dedicated EV charging station. On the UK motorways my Renault Zoe charges from 0-80% in 30 minutes; of course we never charge it that much in one go whilst motorway driving, so we don't need to charge it as long.

My Tesla Model X charges in similar amounts of time, as whilst the supercharger outputs more power, the battery is bigger.

EngineerBetter··on No Man’s Sky One Year Later
Not a particularly well-researched post. Sony did not publish the game, they provided marketing budget. This means that they were not in creative control.
EngineerBetter··on Falling lithium-ion battery prices to drive rapid storage uptake
Wow - that's a crazy amount of energy. As a Brit who's never been the south of the US, is that figure really true? 100kWh is about 300 miles in a Tesla, or boiling a kettle constantly for about 30 hours.

If that's really accurate, then I'm staggered at how much energy folks must be using to keep cool, and makes my efforts at saving energy seem paltry in comparison.

EngineerBetter··on $4k Renault compared to Tesla Model 3
This is not correct. In 2015 Renault introduced the option to buy the battery outright.
EngineerBetter··on $4k Renault compared to Tesla Model 3
Renault were selling the all-electric Fluence in 2011. I'd suggest Nissan probably did more for EV than anyone else with the Leaf.
EngineerBetter··on $4k Renault compared to Tesla Model 3
Totally agree. There's no way I could've afforded a Tesla when we got the Zoe, four years ago. Including the battery rental the Zoe was £225/month, with a first payment of £5,000.

I've only been able to get the Model X because I've been irresponsible with money, and because we IT folk get paid more than we're worth to society.

EngineerBetter··on $4k Renault compared to Tesla Model 3
At home we have a 7kW charger (the most we could get without having to change either the main fuseboard in the house, or have stuff dug up).

That gives the Zoe a charge-time of just over three hours (as we have a 22kWh battery) versus over 13 hours for the Model X. That's 35 miles of charge an hour for the Zoe, and 21 miles of charge an hour for the Model X.

The Zoe can fast-charge at up to 43kW on motorway service stations, whilst the Model X and charge at 120kW. In the UK there are way more locations with fast-chargers the Zoe can use than there are Tesla superchargers.

EngineerBetter··on $4k Renault compared to Tesla Model 3
Mine is 22. I'm wondering whether to upgrade the Zoe to a 41kWh now it's at the end of its finance agreement, or just keep the one I've got.
EngineerBetter··on $4k Renault compared to Tesla Model 3
Yep, that's probably right. I'm not sure what the second-hand prices for the iZoe (with the battery included) are.
EngineerBetter··on $4k Renault compared to Tesla Model 3
Kinda off-topic: I own a Renault Zoe, which is an EV hatchback that you can get second-hand for about £4k, and also a Tesla Model X 90D.

People get far too excited by Tesla's brand, when there are really competitive EVs out there.

Feel free to AMA about EVs or how mine compare.

EngineerBetter··on Ask HN: Is TDD or BDD used in AAA gaming industry?
As a one-time indie game developer who went to work at a 250-person games studio, my answer based on limited experience is "probably not".

BDD in particular is tricky, because beyond the level of abstraction of the engine, you don't really know what you're building. How do you express that a thing should be fun, or weapons reloads feel punchy, in a BDD spec? How do you automatically test that?

Games code exists purely to elicit reactions in human brains. We don't have the technology yet to examine the desired state change in the target system.

Regular apps have the same problem, but with less expensive assets and less iteration. "As a user, I should feel that the login transition is slick" is a spec I can imagine that is UX-related. However, we can probably all agree on what slick is, and failing that you could user-test it to prove that the implementation is acceptable. A game is made of many complex adaptive interacting systems, so every change needs subjective validation.

On the subject of complex adaptive systems: many games feature them and so exhibit fundamentally unpredictable emergent behaviour. This can be hard to test for.

The most testing I've done in a games project is to figure what it is you're trying to build, then unit test the implementation when you've worked out if it's fun.

EngineerBetter··on Concourse CI
Cool - did you folks know about the Concourse London User Group? The last two have been held just around the corner from you: https://www.meetup.com/Concourse-London-User-Group/
EngineerBetter··on Concourse CI
We made Concourse-Up so you don't need to learn BOSH.

https://github.com/EngineerBetter/concourse-up

It'll give you a working, upgradable, auto-healing Concourse in one command.

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