renhanxue

6 ms·

1.
by renhanxue 6mo ago
That's not really accurate. An overwhelming majority of the simplified characters have had their own code points in Unicode ever since 1.0. Some more details here: https://r12a.github.io/scripts/chinese/
2.
by renhanxue 6mo ago
I mean, you can call it a "mountain" of greenwashing but to me it looks more like a mole hill. Total Swedish electricity production is typically 160 to 165 TWh per year and total consumption is usually between 135 and 145 TWh. In
3.
by renhanxue 6mo ago
That may be true in many places, but the Swedish forestry industry is very big, and the district heating plants really do burn mostly forestry byproducts. Of all the biofuel used in Sweden (not just for energy generation), 75% comes from fo
4.
by renhanxue 6mo ago
For Sweden, the coal plants were exclusively for cogeneration (district heating with electricity as a byproduct) and only used as peaker plants in winter. Some of them still exist but have been converted to burn biofuels instead, mostly woo
5.
by renhanxue 7mo ago
The Norwegian Consumer Council's entire yearly budget is about 100M NOK, or about $9.5M USD at the current exchange rate. They most assuredly did not spend >$1M USD on a short video clip.
6.
by renhanxue 7mo ago
I mean, for the most part the book is an edited transcription of what he said at the lectures (or, in some cases, what a guest lecturer said). But the lectures weren't scripted, and we know this because his lecture notes are preserved[
7.
by renhanxue 7mo ago
> The speaker says that Feynman didn't write the Feynman lectures. Wrong. No, she's right, just talking about a different thing. "The Feynman Lectures on Physics" is a physics textbook. [0] He did prepare his own lect
8.
by renhanxue 9mo ago
Most district heating systems in the Nordics are publicly owned, in part or in full. There are also price controls for the privately owned ones.
9.
by renhanxue 9mo ago
Maybe. I guess it's easier to handle in treated form though. At the point where it gets to the facility it's actually not really sewage anymore, it's just clean water, so after passing the heat pumps it's just released i
10.
by renhanxue 9mo ago
Sweden's first commercial nuclear plant[0] was built right next to a newly constructed suburb precisely so that it could be used for district heating too. And also for producing small quantities of weapons grade plutonium, for... resea
11.
by renhanxue 9mo ago
Looks like the expansion to 300 MW will have Stockholm beat soon if it hasn't already happened! Or is that in a different plant? Wasn't entirely clear to me, but great progress nonetheless!
12.
by renhanxue 9mo ago
Those are some big heatpumps, but in terms of installed capacity at a single location they have yet to beat the Stockholm municipal heating utility's installation at Hammarbyverket, which since its most recent expansion in 2013 has a t
13.
by renhanxue 9mo ago
Heating with gas is absolutely not a thing in Sweden, I don't think even a single percentage point of homes use that. Firewood is way more common (it's relatively commonplace in the countryside still). Gas is used for stoves in so
14.
by renhanxue 9mo ago
A lot of the Nordic heat pumps are ground source, that is to say you drill a hole a couple of hundred feet down into the bedrock where it's always a bit above freezing and you circulate your heat exchange fluid down there and back up a
15.
by renhanxue 10mo ago
The fuel pump not automatically restarting on power loss may actually have been an intentional safety feature to prevent scenarios like pumping fuel into a fire in or around the generators. Still part of the Swiss cheese model, of course.
16.
by renhanxue 10mo ago
All of these reports are effectively autogenerated by Big Sleep from fuzzing. Again, Google has been doing this sort of thing for over a decade and has found untold thousands of vulnerabilities like this one. It is not at all clear to me th
17.
by renhanxue 10mo ago
There are dozens if not hundreds of issues just like this one in ffmpeg, except for codecs that are infinitely more common. Google has been running all sorts of fuzzers against ffmpeg for over a decade at this point and it just never ends.
18.
by renhanxue 11mo ago
The article has good tips, but Unicode normalization is just the tip of the iceberg. It is almost always impossible to do what your users expect without locale information (different languages and locales sort and compare the same graphemes
19.
by renhanxue 1y ago
In the EU the authorities have recognized the power of the card networks and introduced price controls on interchange fees in 2015, capping them at 0.2% for debit cards and 0.3% for credit cards.
20.
by renhanxue 1y ago
Generally there are never any transfer fees for private individuals doing domestic transfers. The banks just provide that service for free and eat the cost. Businesses wanting to accept payments via the Swish app usually pay a flat rate of
21.
by renhanxue 1y ago
Having a cash register and handling cash costs money too, doesn't it? It's just a cost of doing business.
22.
by renhanxue 1y ago
Credit card fraud is not nearly as common in Europe as it is in the US. Additionally, and specifically in Sweden, the fees that banks charge businesses for handling cash (picking it up and depositing it at the end of each business day) have
23.
by renhanxue 1y ago
A cheaper alternative to cards here is app payment via Swish (approximately like Venmo). Goes straight to the vendor's bank account at a flat rate of the equivalent of USD ~$0.15 per transaction.
24.
by renhanxue 1y ago
We usually use an app for that (Swish, it's kind of like Venmo I guess, developed in collaboration between the six largest banks). We don't really do transaction reversals in the same way or as commonly as in the US. Paying for a
25.
by renhanxue 1y ago
I'm Swedish and if someone insists on doing a transaction using cash when Swish or card is available, I'd immediately start to wonder if it's for some kind of more or less shady reason, probably tax evasion at the very least.
26.
by renhanxue 1y ago
Yeah, that's kind of my default assumption as well. If someone is insisting on cash I'd assume it's for tax evasion purposes.
27.
by renhanxue 1y ago
I am Swedish and have lived here all my life and I have no idea what the current banknotes look like. I have literally never used them. I remember what they used to look like 20 years ago, but I know they have changed since then.
28.
by renhanxue 1y ago
B-tree skip scan does not address the problem in the article at all.
29.
by renhanxue 1y ago
The core issue the article is pointing to is that most database indexes are B-trees, so if you have a predicate on the form (col_a = 'foo' OR col_b = 'foo'), then it is impossible to use a single B-tree lookup to find al
30.
by renhanxue 1y ago
The article is specifically discussing cases where you have predicates on different columns OR'ed together, like col_a = 'foo' OR col_b = 'foo'.

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