- idlewords parentGetting on the train that's physically in front of you, no matter how crowded, is the rational decision basically everywhere outside Japan, where you can have metaphysical certitude that the next train will show up as scheduled.
- An exponential curve looks locally the same at all points in time. For a very long period of time, computers were always vastly better than they were a year ago, and that wasn't because the computer you'd bought the year before was junk.
Consider that what you're reacting to is a symptom of genuine, rapid progress.
- Reading Graham's essays on writing always puts me in mind of the videos where Mexican moms react to Rachael Ray trying to cook (https://www.youtube.com/watch?v=zFN2g1FBgVA), or a Malaysian guy has to watch a BBC cook make rice (https://youtu.be/53me-ICi_f8?si=0AaZ82dk_AYFqJAx&t=226).
- It does not; see the paper cited in my other reply to you. GCR dose is 1.5-2x on Mars compared to ISS.
The mention of "quality factor" here just begs the question. The reason we need research on biological effects of high-Z ion exposure is that it has a different mechanism of damage, not captured by that paradigm.
- I didn't choose AL shielding as the reference standard to use in the literature; I'm sorry it bugs you.
You can read the author's other work, that goes into great detail about different types of shielding, if you want to gain confidence in his math. The upshot is you need many meters of polyethylene to effectively shield the heavy ion component of GCR, which is what the fuss is about.
But the point of that particular diagram is not shielding, but to illustrate the 2-3x uncertainty in estimates of tumor risk based on our poor understanding of high-Z ion exposure.
- Total GCR dose is 3-5x in transit to Mars compared to what you get on ISS; on the Martian surface it's from 1.5-2x the ISS dose. (see https://www.swsc-journal.org/articles/swsc/pdf/2020/01/swsc2...).
On a long-stay Mars mission, that adds up to 12-18 times the accumulated GCR exposure compared to a six-month ISS increment.
- I lived near this particular park, so the article struck a chord with me.
For things to be better, we need to start doing things differently, and one starting point is to have compassion for the people who are denied the use of public spaces by the hardcore homeless who refuse outreach and aid.
- The title let me down; I was hoping this would be an article about a trebuchet. [edit: I see the post title has changed, the original one was something like "park ranger uses extraordinary methods to remove homeless from SF parks"]
I lived next to the park for several years and grew to loathe the dynamic where the lives of people sleeping rough in Golden Gate Park or Civic Center merit months of one-on-on outreach, while the lives of all of those who can't walk through the park in safety, can't send their kids there to play, and can't sit on the grass for fear of stepping on a used needle or a pile of human excrement, don't seem to matter.
I would like to see the city adopt a compassionate approach that doesn't at the same time enable years of lawbreaking by people who make nominally public spaces off-limits to the law-abiding. I'd like to see a San Francisco where there can be at least one clean, safe, working public toilet.