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Joined 1 year ago
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Cake day: June 11th, 2023

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  • But that’s not what we found. In fact, experimental manipulations that reduced support for the protesters had no impact on support for the demands of those protesters.

    We’ve replicated this finding across a range of different types of nonviolent protest, including protests about racial justice, abortion rights and climate change, and across British, American and Polish participants (this work is being prepared for publication). When members of the public say, “I agree with your cause, I just don’t like your methods,” we should take them at their word.

    Wow, that is both new (at least for me) and interesting - thanks for sharing this article. :)

    I note a potential weakness in the method of analysis: if negative framing (e.g. by the media) reduces support for the protesters as persons (but not their cause), it may still somewhat harm their ability to bring about change, since it probably reduces people’s willingness to team up with them - but not another group which has the same cause but different methods.

    So, if the goal is mass action (which has a component of mobilizing like-minded people to join) I would strongly recommend a protester to choose non-controversial methods (so that even grannies can join). :)




  • “It’s what we call ‘strategic incapacitation’ of groups that threaten the political order,” Walby said. “The tactics also include bogus or trumped up charges, early morning raids, and surveillance and strategic intelligence to know as much as possible about activist communications.

    This wouldn’t be the first time of a police force using the legal process (which is heavily tilted towards their convenience and the inconvenience of anyone suspected or accused) as a punishment. Needless to say, the process should not be tilted or burdensome, but in reality - it is.

    I hope the Canadian legal system at least ensures compensation for false imprisonment and such things.

    Activists would meanwhile benefit from adopting safeguards characteristic of partisans operating against a hostile government, even if their actions are peaceful and seek to inform the public. It’s a shame that one has to view cops as an enemy force, but that’s reality - they aren’t friends of activism anywhere. In some places they just have unchecked power, while in other places their power is limited.




  • Summary:

    But then, in the geologically abrupt space of only a few decades, this great river of ice all but halted. In the two centuries since, it has moved less than 35 feet a year. According to the leading theory, the layer of water underneath it thinned, perhaps by draining into the underside of another glacier. Having lost its lubrication, the glacier slowed down and sank toward the bedrock below.

    /…/

    “The beauty of this idea is that you can start small,” Tulaczyk told me. “You can pick a puny glacier somewhere that doesn’t matter to global sea level.” This summer, Martin Truffer, a glaciologist at the University of Alaska at Fairbanks, will travel to the Juneau Icefield in Alaska to look for a small slab of ice that could be used in a pilot test. If it stops moving, Tulaczyk told me he wants to try to secure permission from Greenland’s Inuit political leaders to drain a larger glacier; he has his eye on one at the country’s northeastern edge, which discharges five gigatons of ice into the Arctic Ocean every year. Only if that worked would he move on to pilots in Antarctica.

    It’s not wild at all. :) The plan makes sense from a physical perspective, but should not be implemented lightly because:

    • it’s extremely hard work and extremely expensive to drain water from beneath an extremely large glacier
    • it doesn’t stop warming, it just puts a brake on ice loss / sea level rise

  • If the motor mount is hackable with reasonable effort, and the motor controller’s interfaces are open, then in principle… yes.

    Yet in reality, companies build extremely complicated cars where premature failure of multiple components can successfully sabotage the whole. :(

    I’ve once needed to repair a Mitsubishi EV motor controller. It took 2 days to dismantle. Schematics were far beyond my skill of reading electronics, and I build model planes as an everyday hobby, so I’ve seen electronics. Replacement of the high voltage comparator was impossible as nobody was selling it separately. The repair shop wanted to replace the entire motor controller (5000 €). Some guy from Sweden had figured out a fix: a 50 cent resistor. But installing it and putting things back was not fun at all. It wasn’t designed to be repaired.

    Needless to say, replacing a headlight bulb on the same car requires removing the front plastic cover, starting from the wheel wells, undoing six bolts, taking out the front lantern, and then you can replace the bulb. I curse them. :P

    But it drives. Hopefully long enough so I can get my own car built from scratch.




  • Interestingly, warfare also has the effect of:

    • causing houses to be abandoned, necessitating houses elsewhere while the abandoned ones likely get bombed

    • decreasing the number of future consumers, whose future footprint would depend on future behaviour patterns (hard to predict)

    • changing future land use patterns, either due to unexploded ordnance or straight out chemical contamination (there are places in France that are still off limits to economic activity, because World War I contaminated the soil with toxic chemicals), here in Estonia there are still forests from which you don’t want trees in your sawmill because they contain shrapnel and bullets from World War II

    I have the feeling that calculating the climate impact of actual war is a difficult job.

    But they could calculate the tonnage of spent fuel and energy, that would be easier.








  • The transfer to electricity could be done by using the heated mass to heat a hot pumped liquid or using transfer rods made of a solid material with a high heat transfer coefficient.

    Alternatively, heat can be extracted by pumping liquid metal (sodium, tin, low-temperature eutectic alloys) in a pipework of copper (if there is chemical compatibility with copper). But handling liquid metal with a magnetic pump isn’t typically done on the DIY tech level.

    To be honest, I tried a fair number of experiments on the subject, including low-temperature Stirling motors. They’re difficult to build well. I would recommend plain old steam turbine. Steam means pressure, pressure means precautions (risk of bursting, risk of getting burned), but modern approaches to boilers try to minimize the amount of water in the system, so it couldn’t flash to steam and explode.


  • I have superficially researched both options (with the conclusion that I cannot use either, since my installation would be too small, and would suffer from severe heat loss due to an unfavourable volume-to-surface ratio - it makes sense to design thermal stores for a city or neighbourhood, not a household).

    I’d add a few notes:

    1. A thermal store using silicate sand is not limited by the melting point of the sand, but the structural strength of the materials holding the sand. You can count on stainless steel up to approximately 600 C, more if you design with reserve strength and good understanding of thermal expansion/contraction. Definitely don’t count on anything above 1000 C or forget the word “cheap”. I have read about some folks designing a super-hot thermal store, but they plan to heat graphite (self-supporting solid material) in an inert gas environment.

    2. Heat loss intensifies with higher temperatures, and the primary type of heat loss becomes radiative loss. Basically, stuff starts glowing. For example, the thermal conductivity of stone wool can be 0.04 W / mK at 10 C, and 0.18 W / mK at 600 C.

    3. Water can be kept liquid beyond 100 C. The most recent thermal stores in Finland are about 100 meters below surface, where the pressure of the liquid column allows heating water to 140 C.

    4. However, any plan of co-generation (making some electricity while extracting the stored heat) requires solid materials and high temperatures.