Posts by guillaume@aleph.land
(DIR) Post #A6mk6fwhpH5yfZT6DQ by guillaume@aleph.land
2021-04-30T21:22:05Z
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It's kind of working now but not as well as I was hoping for.
(DIR) Post #A6qibOM3r9vxoSgday by guillaume@aleph.land
2021-05-02T13:11:40Z
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A trick to form large sparse matrices quickly in #python / #numpy. It should maybe have been obvious, but it took me a while to find it.You could do >>> m = scipy.sparse.lil_matrix(n, n)and then assign values one by one like>>> m[i, j] = vbut this is still kinda slow.It's better to do:>>> rows = [...] # list/array of row indices>>> cols = [...] # list/array of column indices>>> vals = [...] # list/array of values>>> m = scipy.sparse.coo_matrix((vals, (rows, cols)), shape=(n, n))
(DIR) Post #A6qibQNuJGbC6lZ8ka by guillaume@aleph.land
2021-05-02T13:13:08Z
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On a 60000×60000 sparse matrix, my code went from about 4.5 to 1.5 seconds to build it like that.
(DIR) Post #A7ZQSGvE8v7f2I92yO by guillaume@aleph.land
2021-05-24T09:37:26Z
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@thor The other day I got an error like: "error: 'Last name (optional)' must be filled in"
(DIR) Post #A86fgBRlfkfrddKd2u by guillaume@aleph.land
2021-06-09T09:31:29Z
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@fluffy @fribbledom I agree it would be better to have this option on the poll, but I've heard that vaccines probably protect more than previous infection, especially against new variants.
(DIR) Post #A86iOcuv6G2bUAHrpw by guillaume@aleph.land
2021-06-09T10:55:57Z
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@fluffy @fribbledom Yes, it's definitely hard to tell, especially after the official institutions messed up so much with the whole aerosol and mask confusion. (Zeynep Tufekci is worth reading on this and the dynamics of information in general: https://www.theinsight.org/p/the-few-sentences-that-explain-much )Anyway, the CDC cautiously recommends getting vaccinated even if you have been sick previously: https://www.cdc.gov/coronavirus/2019-ncov/vaccines/faq.html
(DIR) Post #A86innXqis6bgeUz68 by guillaume@aleph.land
2021-06-09T11:07:32Z
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@fluffy Oh no believe me, they're not as bad as Sweden. Here they were saying masks were useless until December 2020, and they aren't saying anything about ventilation, aerosols or anything. You still see people walking around with a face screen but no mask, which would only work against large droplets, because of that bad communication.
(DIR) Post #A86jAG75BfOIf1gmH2 by guillaume@aleph.land
2021-06-09T11:12:26Z
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@fluffy It was doing well in the summer 2020. It also didn't do badly compared to places like the US or some European countries, but it was much worse than in other Nordic countries. My understanding is that it's related to culture and low population densities. People are more likely to live alone, are physically less close, and are more likely to follow recommendations.
(DIR) Post #A86kUlLSsR8fGqkzKa by guillaume@aleph.land
2021-06-09T11:22:51Z
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@fluffy There were much more infections and deaths in Sweden than in other Nordic countries that were in very similar circumstances. They wanted to protect the economy but that also failed compared to their neighbours.Look at the deaths for example: https://ourworldindata.org/explorers/coronavirus-data-explorer?zoomToSelection=true&time=2020-03-01..latest&pickerSort=asc&pickerMetric=location&Metric=Confirmed+deaths&Interval=7-day+rolling+average&Relative+to+Population=true&Align+outbreaks=false&country=SWE~NOR~FIN~DNK
(DIR) Post #A86lUrgVPJZWt0D9do by guillaume@aleph.land
2021-06-09T11:36:33Z
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@fluffy I don't have exact data on this. I heard it was hit hard (which they wanted to avoid by not having any kind of strict measures), but now looking for information I see it's recovering surprisingly quickly: https://www.bloomberg.com/news/articles/2021-05-28/sweden-s-export-driven-economy-reaches-pre-pandemic-levelhttps://www.brinknews.com/how-well-are-the-scandinavians-weathering-covid/ looks like the best summary I can find.As anecdotal data, I'm looking for a job now and it's hard, and I was told it was significantly more difficult than usual because of covid, but again I don't have numbers.
(DIR) Post #A9G38BbQZeltPSOa5Q by guillaume@aleph.land
2021-07-13T19:39:58Z
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@thor In France people also cut their own cheese, but they use a knife. You don't need a special tool (though if you're fancy you can use a special cheese knife like this: https://www.couteau-leperigord.com/couteau-fromage-perigord-art-de-la-table-art09-p-26 ).
(DIR) Post #A9G38C8Ob58v3houTQ by guillaume@aleph.land
2021-07-13T19:41:03Z
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@thor Oh and those knife slicers are quite common in Sweden. IKEA has one: https://www.ikea.com/se/sv/p/hjaelpreda-osthyvel-svart-90476531/
(DIR) Post #A9G3geDCiCA9zAUuWG by guillaume@aleph.land
2021-07-13T21:04:16Z
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@thorI don't understand the distinction. If you cut a thin piece, you get a slice, no? That's what I have always done.
(DIR) Post #ABRqjLyIjKJdlcappw by guillaume@aleph.land
2021-09-17T06:14:28Z
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I spend so much time repairing and improving my old #recumbent #bicycle from 1999 I bought on Blocket that I'm thinking of just designing a new bike from scratch. But then I realise I know almost nothing about solid mechanics and there are a lot of important details, like how much pedalling power the frame absorbs by bending: http://www.recumbents.com/wisil/brown/bicycleframedesign.htm
(DIR) Post #ABRqjPTbhO8kdaGNY8 by guillaume@aleph.land
2021-09-17T07:07:35Z
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I should try topology optimisationBut not sure how to deal with multi-objective optimisation there?
(DIR) Post #ABz3Q7tUC1WT0Ce4oK by guillaume@aleph.land
2021-10-03T09:39:40Z
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@thor I would. That's what floating point numbers are for, no?
(DIR) Post #AEELPMl1h8h1vnuncO by guillaume@aleph.land
2021-12-09T14:37:14Z
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@thor Relevant?
(DIR) Post #AGP5YOjUTotUFomsMK by guillaume@aleph.land
2022-02-12T14:44:56Z
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@izaya I feel stupid, I don't get this one.
(DIR) Post #AZBaxxMWRD91nJPOEq by guillaume@aleph.land
2023-08-28T10:01:33Z
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It's 2023 and Amazon still has character encoding problems(yes I bought something on Amazon, it was out of stock literally everywhere else)#unicode
(DIR) Post #AoNWYpHz6hkNSps5D6 by guillaume@aleph.land
2024-11-24T20:10:30Z
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I tried the tyre glider tool for changing bicycle tyres, and I can recommend it! It wasn't as effortless as in they show in their video, but it definitely worked much better than usual tyre levers.https://tyreglider.co.uk/#bicycle #cycling