Stefan Ruijsenaars

@stefan_arrr

Software engineer at a quantitative trading firm • I speak EN/FR/NL/ES/CAT • Build the future 🚀

London, England
Joined October 2010

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  1. Retweeted

    A friend asked me to defend technology in two tweets. Curious for critiques, or your own version. Here's mine: Society survives or dies based on its ability to sustainably grow the pie. Without a growing pie, there’s a winner for every loser, and we engage in zero sum conflict.

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  2. Retweeted
    4 hours ago

    Here is a paper forecasting that it will peak in Wuhan on 20 April 2020 & other cities 1-2 wks later. So we're looking at Q2 not just Q1 if this were true.

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  3. Retweeted

    Digital quarantine is here. It appears that folks who fled Wuhan have been digitally quarantined, likely via WeChat. Their apps don’t work outside the quarantine zone. Now that’s happened to 240 Uber users in Mexico exposed to the infected. Complex issue! A thread…🧵

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  4. Retweeted

    I recently binge-read more than half of blog posts by Aaron Swartz () and I think he was one of the few deep thinkers of our time. I'd definitely recommend checking out his posts, especially Theory of Change ().

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  5. Retweeted

    "appearance is inextricably linked to self-esteem. For adolescents the relationship between appearance and global self-esteem is very high (r= 0.65). Physical appearance takes precedence in predicting global self-esteem, followed by peer social acceptance"

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  6. Retweeted
    21 hours ago

    "Recent work on human capital ... stresses that the quality and competence of workers in the top few percent of the distribution mattered more to technological advances than the capabilities of the average worker". What are the policy implications?

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  7. Retweeted

    This video purports to be from one of the new hospitals China has built in Wuhan for coronavirus patients. If real, gives a sense of the severity. One way doors, food via a tray, probably negative pressure like a BSL-4. A maximum security prison for containment of this disease.

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  8. Retweeted

    Sequoia, one of Silicon Valley’s big beasts, is coming to London

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  9. Retweeted
    18 hours ago

    Rolls-Royce plans to build up to 15 mini nuclear reactors in Britain Paul Stein, CTO for Rolls-Royce, said that the company is leading a consortium to produce factory-built modular nuclear reactors that can be delivered for assembly by ordinary lorries.

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  10. the fashionable thing to do is to be awful

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  11. Retweeted
    Feb 1

    I feel like a lot of US citizens don’t quite get how hard it is to get an immigrant visa even if you are super qualified—many friends/family have struggled w the H1-B lottery or spent months applying for an O1 or got denied entry even though they have MIT degrees/great jobs/etc

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  12. Retweeted

    If you could build anything, what would you build?

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  13. Retweeted
    Feb 1

    In the new Taylor Swift documentary, she says “my entire moral code is the need to be perceived as good” and I’m going to be thinking about this until I die.

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  14. Retweeted
    Feb 2

    The best thread you will read today on the links between Video Assistant Refereeing and 19th century Christianity (and much more)

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  15. Retweeted

    NEW: China's National Health Commission says victims of coronavirus should be immediately cremated after death. Burial is not an option.

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  16. Retweeted

    Most people never, ever forget the first person to give them a sizable advance on their own self-confidence — there's no greater security in life than being a serial enabler of wonderful young people

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  17. Retweeted

    I was today years old when I learned that an ampersand (&) is a ligature for the word 'et'

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  18. Retweeted
    Jan 31
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  19. Feb 1
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  20. Retweeted
    Jan 31

    peter Zeihan: Today a report signed by hundreds of (mostly Chinese) scientists indicates that the Chinese government was well aware of the virus’ human-to-human transmission as soon as early December, but chose to sit on that information for PR reasons.

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