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itengelhardton I liked this simple calculus exercise

Thank you for asking this question. I didn't understand the notation either

itengelhardton I liked this simple calculus exercise

Man, thank you for writing floor(x/2) because I've been looking at the original post and didn't know what those silly brackets are supposed to mean.

itengelhardton Multiple Passengers Skipped Customs on US-Bound International Flight

We went through immigration four weeks ago and didn't get a stamp in the passport either.

itengelhardton We're going to need a lot of solar panels

As far as I know, around 1,000 Euro / sqm is a good estimate for bringing a 200+ kWh/(sqm * a) house down to about 85-100 kWh(sqm * a)

itengelhardton I Can’t Stop Winning

What? I'm German. This is infuriating.

I now have to pay him and ask for an invoice just to experience this :-)

itengelhardton Ask HN: Good, experienced engineer but suck at interviews. Looking for a coach

Hi,

I think Josh Doody might be the right mentor for you. He definitely offers coaching/mentorship sessions. Check out his writing & work here: https://fearlesssalarynegotiation.com/

itengelhardton Ask HN: What influenced your personal growth the most?

I'd have to say mostly sweets and cakes ;-)

itengelhardton Tesla's head of battery engineering exits

In the investors call last week Tesla stated that the problem is at the Gigafactory with battery production.

Here's a link to a summary of conference call: https://www.reddit.com/r/RealTesla/comments/7ao4m0/conferenc...

That forum is quite anti-Tesla (as opposed to /r/teslamotors). The whole Tesla thing is quite controversial - lots of haters, lots of fanboys.

Best advice I can give you: Read what both sides have to say and weigh the arguments. Then just stick with the truth you've always believed in - it's what everyone does in 2017 ;-)

itengelhardton Tesla's head of battery engineering exits

IMHO two things:

a) "fast charger" is a loose term and is often used for anything exceeding 20kW. Superchargers deliver up to 140 kW (split between two cars) or 120 kW (to one car). That's why Tesla/Elon sometimes refer to them as "level 4 charger", although the specification ends at level 3. Other manufacturers are now getting on that train with (according to specification) up to 400 kW

b) The notion of the "average electric car user" does not take into account that yes, people drive less than 80km per day on average, BUT they go on the occasional road trip. And they don't want to have a car sitting around just for road trips. They want one that can do both (commute & roadtrip). That's where the supercharger network helps

itengelhardton Tesla's head of battery engineering exits

Initially ludicrous mode was not just a software update. You could get it on your (already delivered) MS P90D, but had to bring it into service. They changed a fuse and activated ludicrous mode in software.

Of course, today all Tesla P100D get built with that fuse already in place - so it's "just a software upgrade" today.

There's quite a bit of electrical magic going on for a fuse to be able to handle insane current bursts while retaining a good response time in case of a catastrophic fault.

itengelhardton Tesla’s Push to Build a Self-Driving Car Sparks Dissent Among Its Engineers

you're right. I googled for "number of car deaths in US" (or so I thought) and that number came up. 1.3M seems to be the number for world wide fatalities.

itengelhardton Tesla’s Push to Build a Self-Driving Car Sparks Dissent Among Its Engineers

That's why at current we have 1.3 million people dying on the road in the US alone. It might make the matter of transitioning to self-driving worse, but it also makes manual driving worse.

itengelhardton South Australia teams with Tesla, Neoen to build world's biggest Li-ion battery

According to Tesla's website (https://www.tesla.com/powerpack) each Powerpack has 50 kW / 210kWh with a scalable inverter power ranging from 50 kVA to 625 kVA.

So they could have gotten a system with 100 MW/420 MWh

itengelhardton Ask HN: Who are the most controversial (yet still popular) HNers?

I guess it's just the general loss aversion people experience - at least that's it for me.

itengelhardton Silicon Valley Women, in Cultural Shift, Frankly Describe Sexual Harassment

> Lindsay Meyer, an entrepreneur in San Francisco, said Mr. Caldbeck put $25,000 of his own money into her fitness start-up in 2015. That gave Mr. Caldbeck reason to constantly text her; in those messages, reviewed by The Times, he asked if she was attracted to him and why she would rather be with her boyfriend than him. At times, he groped and kissed her, she said.

Nice! Here's grade-A material for the 46. President of the United States of America /s

edit: added /s because it apparently wasn't obvious to some out there. Further clarification: This is a sarcastic comment on the fact that the USA have a president who has publicly admitted to sexually harassing women. With that person at the helm of the nation, how can anyone be surprised by others behaving similarly?

itengelhardton Liebster Jesu, wir sind hier – BWV 731 [video]

great piece of music, beautiful website design, something completely different for a change.

Bach wasn't into computers much, but man did he hack those notes. Great pick!

itengelhardton Tesla Wins Contract to Help Power the California Grid

I think this is very much a success of technology. I see it as battery tech having advanced enough (at a slow, but exponential rate) to bring us to a point where this is technologically possible AND economical

itengelhardton Auto-GCAS Saves Unconscious F-16 Pilot

The article states that the pilot awoke mid-recovery and increased to 9.1G

itengelhardton Ask HN: Are open vacation policies a scam?

Hey, zorked, wake up :-)

Balsamiq offers mandatory vacation: 20 + 9 holidays + unlimited. I hope that is reasonably close to your 25 mandatory + unlimited. I think it's great - plus they are an amazing bunch of people with a smart & likeable boss.

Source==> http://money.cnn.com/2015/12/15/pf/mandatory-vacation/

itengelhardton Ask HN: Single Person startup/company?

I run SaaS products (https://www.linksspy.com and http://www.terminretter.de) as profitable side projects.

I'm also working on a book on email marketing for SaaS products that details what I've learned from marketing my own products: http://saasemailmarketing.net

itengelhardton Ask HN: One-person SaaS apps that are profitable?

Just curious: How should people contact you given there is no information in your profile?

itengelhardton List of Productized Consulting Services

Thanks! I'll fix that

itengelhardton List of Productized Consulting Services

Yeah. Total SEO spam. Highly optimized for the keyword "list" and it has attracted "links" from such illustrious domains like waybackhn.com :-)

In all seriousness: The title was stolen from (IIRC) Michael Buckbee of ExpeditedSSL (great guy) and I consider it a bit tongue-in-cheek - but hey, that doesn't work on the internet apparently.

itengelhardton List of Productized Consulting Services

LOL. Thanks, you made me lol :-)

itengelhardton Ask HN: What are you currently building?

Maybe pre-launch and pricing not figured out yet?

He mentions that he just started working on it, so he could be in some sort of private beta.

itengelhardton Ask HN: What are you currently building?

One way to alleviate this concern is to know your audience and not sign up for a product like Mailscope if your audience is privacy-minded.

itengelhardton Ask HN: What is your most profitable side project?

For me this is https://www.LinksSpy.com - a CRM for getting white-hat inbound links.

I started it in April 2014 and it's making about $1,000/month. Haven't invested time into it (busy day job) in the past 2-3 months. I've got a bunch of ideas how to grow it, but time is a serious constraint

itengelhardton Please don't use Slack for FOSS projects

Correct me if I'm wrong, but don't companies usually get a quarter billion dollars AFTER they have shown traction?

itengelhardton Show HN: Barter Hack – trade your technical skills for other people's

Why am I not in the least bit surprised that the #1 offer currently is "programming in exchange for sex"?

itengelhardton Black Hat USA 2015: The full story of how that Jeep was hacked

There is at least the suggestions that this will roll out in the next few weeks to a subset of Tesla owners (not to call them beta testers... but beta testers). https://twitter.com/elonmusk/status/627040381729906688