HN user
I work as an independent consultant in simulation and monitoring of refrigeration (cooling/heating) systems.
This is having a direct impact on my wellbeing. I was at Whole Foods in Hudson Yards NYC and I couldn’t get the prime discount on my chocolate bar because the system isn’t working. Decided not to get the chocolate bar. Now my chocolate levels are way too low.
Yes
Right. Aside from declining GDP per capita, way too much immigration, a housing crisis and wage stagnation things are going great!
Education centre seems like a strange choice given that it’s in the middle of nowhere…
Yeah I’m not sure I agree with that statement either…
This is a bit like saying you cheat on tests by studying…
I don’t see how this challenges the CICO argument at all. Weight gain is just a function of calories absorbed and calories burned. You can dig into the details of what those two numbers might be for different people but it doesn’t change what the function is. That being said, CICO is bordering on being a truism and not really adding much to a discussion on weight gain.
In aggregate, employees make a company money. That much is trivially true. At the individual level, one can be a net gain, net loss, or breakeven. I often wonder how skewed this distribution is at some companies. Ideally you trim the ones that are a net loss and thus on average aren't making the company money. Whether or not it's obvious who those people are isn't known to me. Anyway, I don't think it's a good assumption that the people being laid off are making the company money on average.
True, that’s pretty common in industrial and commercial settings as well. Though here I’m thinking more in terms of a residential setting. Relying on a secondary fluid loop would likely raise the cost quite a bit due to the extra components required.
They’ve raised the global warming issue about current refrigerants but what really matters is the economics of isocaloric vs. vapor compression because there are more modern refrigerants[1] that have quite low global warming potential. It makes that argument carry less weight than it used to imo.
[1] See R455A, R1234ze, R515B, for example.
So it’s a solid and it melts, absorbing heat, then it must turn back into a solid, releasing heat. I’m curious to see how they move the solid back to where it started to complete the cycle. Maybe the material doesn’t move at all, it’s on some kind of revolving assembly? It’s just that in modern refrigeration systems, the evaporator isn’t necessarily that close to the condenser, so with a solid I can see this being awkward in some situations.
New refrigerants will make a big difference here. The main theoretical restriction is the pressure delta required to go from a low enough pressure to transfer heat into the system at a low ambient temperature, then to a high enough pressure to transfer heat out of the system at a high ambient temperature. That’s what causes the loss in COP at low temperatures—the increased work the compressor has to do.
It’s definitely theoretically possible. There are refrigerants that can do this now with a relatively low delta, but generally they are flammable, toxic, or have high global warming potential.
There are other ways around this like booster systems, but it becomes a $$$ issue at that point.
COP vs. efficiency. In the case of a heat pump, it takes 1 kW to “move” 3 kW of heat, rather than turning 1 kW into 3 kW.
SBF more or less admitted in the leaked Twitter DMs that the “effective altruism” was just PR (surprising no one, I hope)
Kagi has been great for me
I’m not sure why, but I have a feeling that, long term, this won’t turn out as poorly as everyone thinks.
I think there are a lot of people that would. Are they the people that twitter actually needs? I’m not sure. But there are people that would. Some of them are in this thread.
Well he was dumb enough to post a bunch of lies and nonsense to Twitter the last couple days…
One day when you’re all grown up you’ll understand that people valuing different things than you doesn’t mean they’re idiots.
Works fine for me on iOS 16
It brings predictability because know you won’t run out of memory. If everything is statically allocated, the total amount of memory the application will use is known at compile time. Very important for memory restricted systems.
My rate is 165 USD/hr, but I’ll drop it as low as 135 for a long contract (6 months+). I do custom software for the refrigeration industry (mostly simulations, sensor data logging, a lot of web apps, etc.). But yeah like another poster mentioned, I just raise it every time I work with a new customer.
Imo hourly rates are kind of bogus because not every hour is the same and hours can’t determine value. Generally I negotiate a weekly rate @ 35 hrs / week and try to deliver something valuable every week. The amount of hours I actually work in a week varies.
You will get better pretty quickly if you keep at it. Hopefully you live near a place where you have a bit of elevation gain for your hikes. Another thing that I’ve found helps a lot is squats and deadlifts. I would say the main thing that sets my hiking ability apart from my friends is I have much stronger legs.
Travelling helped me a lot. You’re kind of forced into social situations especially if you stay in hostels. I’m not talking about a 1 week vacation though. I’d recommend a multi-month trip.
This paper has some interesting details on potential causes of lean diabetes: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4434081/
This is the more correct answer. If anyone wants to dive into mechanisms of insulin resistance, this paper is a good overview: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6170977/
The ideal way to less work with freelancing is to get retainer contracts. Build an application for a business then charge a quarterly fee for maintenance. Maintenance is usually about an hour or two of work a month. Though I'm more in lane #1 now, I did do this for a while. I travelled a lot and probably worked 3 months/yr.
This is a great book/course. I started programming at 13 but didn't truly get a grasp of how a computer worked until I took this course at 24. Got me started with embedded systems and all kinds of other fun stuff.
In order to make it reliable you had to make a custom classifier. The one that shipped with their software was garbage.
Funny story about the Myo. It was a promising device and seemed to me like it had great niche applications (such as medical). Founders weren't interested in that I guess and moved to smart glasses. Last summer they sold the patents for Myo to a company called CTRL Labs for about $20M. In the fall Facebook snatched up CTRL Labs for $500M - $1B, and their product description was basically that of the Myo.
More info:
https://betakit.com/ctrl-labs-acquires-norths-patents-for-my...
$180M from what I read. Seems they were acquired because sales were almost non-existent and they were running out of money.