adwn

18 ms·

91.
by adwn 1y ago
> Journalists write for an audiance which normally gets it. That's a bullshit justification. "It's factually wrong, but that's okay, the true audience knows what the author means anyway." Then why write it
92.
by adwn 1y ago
> And secondly what he probalby meant was […] If they can't precisely convey the intended meaning in written words, they shouldn't be a journalist.
93.
by adwn 1y ago
Unfortunately, almost all three-phase [1] on-grid inverters that are on the market, especially hybrid inverters, only support batteries with much higher voltages, like 150 V or even more. [1] Three-phase wiring in homes seems to be very rar
94.
by adwn 1y ago
Maybe, but I think the premium charged by the main manufacturer's is unjustifiably high. Those battery boxes are relatively dumb: besides the cells, they just need some voltage and temperature sensors for monitoring, some power electro
95.
by adwn 1y ago
> Shouldn't this be a once-off cost per battery-pack version? A BMS isn't just software. It requires a µC, voltage and temperature sensors for cell monitoring, and power electronics for cell balancing. However, those are al
96.
by adwn 1y ago
> New grid storage batteries cost around $200-300/kWh That doesn't sound right. You can already get high-quality, prismatic LFP cells for ~50 US$/kWh [1] from European distributors at low-volumes, so bulk from China shou
97.
by adwn 1y ago
Today you can already get 51.2 V, 16 kWh batteries complete with balancer and BMS from a European supplier for 1200 € (1400 US$): https://www.nkon.nl/novat/nkon-ess-eco-s-51-2v-16-1kwh-thuis...
98.
by adwn 1y ago
> Without memory order guarantees enforced by memory barriers, a write to the boolean in thread A is not guaranteed to be observed by thread B. No, that's not correct. Memory ordering doesn't influence how fast a write is pro
99.
by adwn 1y ago
> A maglev train is several centimeters from the rail […] No maglev train I ever heard of travels at 36,000 km/h. This is about two orders of magnitude faster. > We already have megavolt powerlines. That's transmissio
100.
by adwn 1y ago
Oh, and 10 tonnes is bus-sized. For infrastructure at that scale, you want trains at the very least, and those are on the order of 1,000 tonnes. Multiply force, power, and current by 100 accordingly.
101.
by adwn 1y ago
> If you somehow manage to get magnetic fields involved, so you are not afraid of friction with the cable itself, at 1.3 max apparent acceleration […] This means that half-way after 58 minutes, the climber is traveling at 0.3 * 9.81 m&
102.
by adwn 1y ago
Almost all discussions around space elevators focus on the cable itself, how to manufacture and deploy it, and completely forget about the issues that would arise afterwards: 1) How do you attach the climber to the cable without affecting i
103.
by adwn 1y ago
You're arguing that "Black" is an identity in the US because the people thus identified share a common history within the US, even though their ancestors originated from different regions and cultures before they were enslave
104.
by adwn 1y ago
I think you're confusing concurrency with parallelism . I've been talking about parallelization since my first comment in this thread. There's some overlap, yes, but the aspects you listed have typically very little to d
105.
by adwn 1y ago
This one? > Turns out threads also may share resources like out-of-process files, memory mapped regions, shared memory, databases, distributed transactions For multi-threaded parallelization, - out-of-process files - database
106.
by adwn 1y ago
> OS IPC exists for a reason Message-passing IPC is much, much slower and less efficient than shared-memory communication, and inter-process IPC (both message-passing and shared-memory) is much less convenient than intra-process multi-
107.
by adwn 1y ago
> for everything else on userspace compiled managed languages are a much better option That might be true if you're developing a pure application [1], but not if you're writing a library. Have fun integrating a C# library i
108.
by adwn 1y ago
Whenever you hear a German entrepreneur talk about the biggest obstacles they have and are facing, it's never crumbling infrastructure or slow internet . The number one complaint is always excessive bureaucracy and crippling regu
109.
by adwn 1y ago
> Both of things either have already been reverse-engineered, or are in the process of being reverse-engineered. Please provide a source for this claim. Yosys, for example, can't route [1] designs even for Xilinx 7-series device
110.
by adwn 1y ago
As much as I wish this would come true, there's little chance for a full, end-to-end open source toolchain for Xilinx or Altera FPGAs that's competitive with the vendor tools. The reason for this is that there's no publicly
111.
by adwn 1y ago
Xilinx toolchain installations used to include a file which was just the concatenation of the license files of every single open source library they were using somewhere inside any of their own software. Now if you installed two or more com
112.
by adwn 1y ago
I don't understand the table under Benchmark Results . To compare the quality of two toolchains, the device architecture needs to be the same. "LUT6" vs "LUT4" doesn't cut it, there's much, much more to t
113.
by adwn 1y ago
I don't know about batteries, but ionizing radiation can definitely permanently damage microelectronics, and those don't have DNA either.
114.
by adwn 1y ago
> […] on ARM64 […] Well, if you target a specific architecture , then of course you can assume more guarantees than in general, portable code. And in general, a processor might distinguish between non-atomic and relaxed-atomic reads a
115.
by adwn 1y ago
Yes, this can make sense if - the value is often doesn't require an update, and - there's contention on the cache line, i.e., at least two cores frequently read or write that cache line. But there are important details to consid
116.
by adwn 1y ago
> […] 'just asking questions' […] That's not the case here. Non-replicable results from studies in the social sciences are a very real, very frequent phenomenon, and the first question to ask when seeing a claim about a
117.
by adwn 1y ago
I know, and I guess it's better than nothing, but replications by the original author don't exactly grant the same level of confidence as independent replications.
118.
by adwn 1y ago
No idea why this is getting downvoted. Everything I wrote is true and directly on topic. Further reading: https://en.wikipedia.org/wiki/Replication_crisis
119.
by adwn 1y ago
> I don’t think all of it is shallow, especially given the format: the book is mostly a prose re-writing of the author’s own peer-reviewed anthropology scientific papers. That's not the issue. The replication crisis is the pheno
120.
by adwn 1y ago
> It gets unconfusing if you realize it just means White. It definitely does not. Russia, for example, would be considered "White", but is decidedly not part of "the West".

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