Laboratory planner by day, toddler parent by night, enthusiastic everything-hobbyist in the thirty minutes a day I get to myself.

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Joined 1 year ago
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Cake day: July 31st, 2023

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  • The reverse. OceanGate saw how planes were being built and said, “let’s do that for submersibles!” even though in airplanes, composites are subjected to <1 atmosphere of tension loading and <2g aerodynamic loading, whereas their submersible was going to be subjected to >400 atmospheres of compression loading, and a much more corrosive environment.

    Composites in aircraft have a fairly long and uncontroversial history, and there’s nothing inherently wrong with them in that application. The biggest problem with composites is what happens with them at the end of their service life. Finding ways to recycle them without compromising safety is a good thing, and if it weren’t for Boeing having such a damaged reputation at the moment I think nobody would bat an eye.


  • Here’s the weird part though-

    Four in 10 hiring managers said they always contacted workers who applied for made-up jobs. Forty-five percent said they sometimes contacted those job seekers. Among companies that contacted applicants, 85% report interviewing the person.

    Does that part make sense to anyone?

    This strikes me less as fraud and more as a way to stay open to talent that you may not need immediately but still want to be able to add to your organization, in an era when basically nobody sends unsolicited resumes anymore. Like, maybe you don’t have a project in need of a Whatever Specialist right now, but it’s a field your company works in, and if a really exceptional Whatever Specialist is on the market, you don’t want to miss the opportunity to bring them on.




  • Federal authorities raided a home belonging to Oakland Mayor Sheng Thao early Thursday as part of a California investigation that included a search of at least two other houses, officials said… Agents also carried out searches about three miles to the south at two homes owned by members of the politically influential Duong family that owns the recycling company Cal Waste Solutions, the Chronicle said. The firm has been investigated over campaign contributions to Thao and other elected city officials, the local news outlet Oaklandside reported in 2020.





  • The play-by-email mode was broken to the point of uselessness in Civ5 and I don’t think they fixed in it in 6 (you had to have an always-on Windows desktop system running the server, and because the game logic was integrated into the graphics engine you couldn’t run it headless, and then on top of that there was basically no working system to coordinate active DLCs between players so most of the time people couldn’t join even if you did get the damn thing running) so my friends and I tried once and gave up. I would love for 7 to have a robust PBEM system so that we can play together without needing to spend hours a week watching paint dry while everybody else plots their turns, but I’m not holding my breath.



  • Any time you see perovskite-based cells mentioned, you can assume for the time being that it’s just R&D. Perovskites are cool materials that open up a lot of neat possibilities, like cheaply inkjet-printing PV cells, but they have fundamental durability issues in the real world. When exposed to water, oxygen, and UV light, the perovskite crystals break down fairly rapidly.

    That’s not to say that the tech can’t be made to work – at least one lab team has developed cells with longevity similar to silicon PVs – but somebody’s going to have to come up with an approach that solves for performance, longevity, and manufacturability all at once, and that hasn’t happened yet. I imagine that when they do, that will be front-and-center in the press release, rather than just an efficiency metric.


  • North County was previously where all the middle class white people went after fleeing the urban core. Then as more African American families moved in to get away from urban decay, the white population moved to suburbs south and west of the city. This isn’t civil rights history, either – it’s been an ongoing process as recently as the 90s. My (white) dad grew up in Blackjack, just a short ways from Ferguson, and his parents only moved out of the area around 1995. When the unrest around Michael Brown’s death kicked off, he turned on the evening news to see the supermarket where my grandmother used to buy groceries going up in flames.



  • This is actually becoming somewhat commonplace. For example, in many cutting-edge cancer therapies, blood is drawn from the patient, processed in tissue-culture suites on site to extract the patient’s immune cells and sensitize them to some marker expressed by their specific cancer cells, and then the modified immune cells are returned to the patient room and transfused back into their bodies. It’s not cheap per se but it’s something that most top-tier cancer centers can do, and to do the similar process of extracting stem cells, inducing them to transform into pancreatic islet cells, and transplanting those into the patient’s pancreas isn’t that big of a jump – and it’d be cheaper than a lifetime of insulin in any case. It also points the way towards treating other kinds of organ failure without the risk of rejection, too.


  • I don’t think it would make much of a difference. Absent Reagan, the Republican nominee would have been Bush Sr., and he likely would have won in the general – Carter was wildly unpopular due to persistent stagflation, the Iranian oil crisis, and the related hostage crisis. The GOP could have nominated an expired jar of mayonnaise and still won the election, and then done most of the same things anyway – Reagan was infamously more a charismatic figurehead than a technocrat, and visibly going senile in his second term. The conservative cabal moving the levers behind the scene would have been largely the same.

    As ever, the Great Man theory of history tends to be more hagiography than fact, and it’s most informative to look at larger socio-cultural trends.



  • Data center cooling towers can be closed- or open-loop, and even operate in a hybrid mode depending on demand and air temps/humidity. Problem is, the places where open-loop evaporative cooling works best are arid, low-humidity regions where water is a scarce resource to start.

    On the other hand, several of the FAANGS are building datacenters right now in my area, where we’re in the watershed of the largest river in the country, it’s regularly humid and rainy, any water used in a given process is either treated and released back into the river, or fairly quickly condenses back out of the atmosphere in the form of rain somewhere a few hundred miles further east (where it will eventually collect back into the same river). The only way that water is “wasted” in this environment has to do with the resources used to treat and distribute it. However, because it’s often hot and humid around here, open loop cooling isn’t as effective, and it’s more common to see closed-loop systems.

    Bottom line, though, I think the siting of water-intensive industries in water-poor parts of the country is a governmental failure, first and foremost. States like Arizona in particular have a long history of planning as though they aren’t in a dry desert that has to share its only renewable water resource with two other states, and offering utility incentives to potential employers that treat that resource as if it’s infinite. A government that was focused on the long-term viability of the state as a place to live rather than on short-term wins that politicians can campaign on wouldn’t be making those concessions.