kavalg

12 ms·

61.
by kavalg 1y ago
The abstract doesn't mention that accuracy is better than GPS, but by INS (inertial).
62.
by kavalg 1y ago
Wouldn't that be prohibitive energy-wise? AFAIK satellites are not abundant in electrical power.
63.
by kavalg 2y ago
The last time trading oil with other currencies was on the table, a couple of dictators lost their heads.
64.
by kavalg 2y ago
Are you sure? Maybe the rich just want to buy shares back at a favorable price. I can't help wondering how much cash they are holding now.
65.
by kavalg 2y ago
And license: Creative Commons Attribution, Non Commercial
66.
by kavalg 2y ago
In my experience, military aircrafts are visible in flightradar most of the time. However, if they are flying in a group (e.g. choppers), usually only one of them is visible.
67.
by kavalg 2y ago
Just FYI, it turned out to be a bad connection between the controler PCB and the NTC temperature sensor that measures the condensation temperature at the plate heat exchanger.
68.
by kavalg 2y ago
Thanks for the info! Now it is much easier to understand your concerns. It is a rather big installation that you have here, in the range around 100kW (if both space heating and DHW are considered). Such systems (aka chillers) are usually in
69.
by kavalg 2y ago
Wow! Your notes look like a treasure trove on the topic(s)!. I will definitely read them. Ironically, my heat pump just failed yesterday and now I am going through the service manual, so the resistance heater proponents may have some merit
70.
by kavalg 2y ago
You can buy smaller ones. Domestic heat pumps usually start around 6-8 kW for single phase ones and go up to ~20kw for 3-phase units. Keep in mind that these values are the peak power of the heat pump, which you would rarely use. Modern uni
71.
by kavalg 2y ago
Noise could be a problem, but it is often the result of a bad installation. I'd be curious how much was the quote for the heat pump vs the oil heater.
72.
by kavalg 2y ago
USD 4000 will buy you something like 12 - 16Kw R32 heat pump. If you have enough roof area to install 50kW PVs then you must live in a mansion :). Another thing is that heat pump installations are usually dual purpose (space heating/co
73.
by kavalg 2y ago
That is a good question. The usable life of a combined heat pump (space heating/cooling + DHW) is somewhere between 10-15 years. For the ones, dedicated to DHW, I cannot really tell, but I would expect it to be longer, because they are
74.
by kavalg 2y ago
As hot as possible is not the way to go. Heat pump COP will degrade dramatically if you try to boil the water. It is not even possible with the popular refrigerants (R32, R410a and even R143a), because they will exceed their critical temper
75.
by kavalg 2y ago
True, but you never need 200F for DHW. This is even dangerous (scalding) and harmful to the piping. Typical temperatures for heat pump derived DHW are around 120F (45-50C), with some (bi)weekly cycles to avoid legionella build up at 150F(6
76.
by kavalg 2y ago
Why are people even considering an electric heating element, when you can get at least 2-3 times the efficiency of a DHW heat pump that would probably cost you ~ $4000. In my experience, I have found that for PV panels it is often the roof
77.
by kavalg 2y ago
Great comments from both of you. I will also add the (unsupportive) environment and uncertainty for the future as major factors IMHO. One should also consider the "outside" environment. We jumped from covid right into war without
78.
by kavalg 2y ago
> Does this reveal an inherent tribalism in our thinking? Yes, it does. We are humans too, not some upper cast of society that is permanently immune to prejudice, emotions and media influence reinforcing the former two. Unfortunately, it
79.
by kavalg 2y ago
Good article overall. Quite often we are caught in our own dilemma and risk being toxic. My only criticism of the article will be not mentioning the risks of being "too empathic" and absorbing other people's problems into you
80.
by kavalg 2y ago
Which is still valuable to some extent.
81.
by kavalg 2y ago
Nothing like FB/Insta (which I am not using), but for me HN still counts.
82.
by kavalg 2y ago
I already have this in production. Interested? PS: Please, don't tell anyone that it is all starch, sugar and artificial color/flavor :)
83.
by kavalg 2y ago
Don't forget that the executive is also a (human) employee. If AGI is working so well, why would the major stakeholders need a human CEO?
84.
by kavalg 2y ago
Extrapolating this, I cannot help but imagine a dystopian universe in which humans' reason for existence is to be some uber AI's pets.
85.
by kavalg 2y ago
Not saying Apple is great but for me MS UX has been an utter crap, both in managed corp env and on a personal device.
86.
by kavalg 2y ago
It depends. If fed with high quality content (e.g. publications) results are decent and mostly on the positive side of time savings/value. Try to ask it a simple question, such as "pros and cons of these two smartphones" and
87.
by kavalg 2y ago
Currently the going annual salary for a senior developer in Bulgaria (Eastern Europe) is somewhere between EUR 50k - 75 EUR net, with 25-30 days of paid time off. The gross will be about 25% more (income tax is 10%, social security around 4
88.
by kavalg 2y ago
The explanation is that they wanted the (perceived) productivity back. Alternatively, they may have wanted to push overall compensation down (e.g. having some employees quit and only luring back the ones they actually like). Of course, it v
89.
by kavalg 2y ago
but even then it is not so trivial. Yesterday I gave DeepSeek a simple diophantine equation and it got it wrong 3 times, tried to correct itself and didn't end on a correct solution, but rather lied that the final solution is correct.
90.
by kavalg 2y ago
The burden will be on proving "significant harm"

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