kkylin

27 ms·

331.
by kkylin 7y ago
Yeah, I commuted by bike until we had kids. Sadly, the preschool that we liked the most also wasn't easily bikable from the house. The kids now go to a school that is easily bikable, and it's a joy.
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by kkylin 7y ago
And many parents we know (ourselves included) give up exercise. If at all possible, try to maintain some semblance of an exercise routine.
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by kkylin 7y ago
Not a physicist, but my understanding (from having glanced at one of Einstein's 1905 papers a long time ago) was that the genesis of SR has a context. Specifically, the following observations bothered Einstein (below are my words, don
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by kkylin 7y ago
Correction: by "article" I was referring to the Wikipedia one on attractors, not the original post.
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by kkylin 7y ago
One of Terry Tao's recent results shows that an equation that he calls the "averaged Navier-Stokes equation" can have solutions that "blow up" in finite time, starting from a perfectly nice initial condition [0]. P
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by kkylin 7y ago
Presumably any moons that did not end up in a nice stable resonant orbit would have had a higher chance of being ejected or colliding with something.
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by kkylin 7y ago
Not quite -- orbital mechanics are Hamiltonian, which means they conserve energy, phase space volume, and often a bunch of other things. Dynamical systems that conserve phase space volume cannot have "strange" attractors (attract
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by kkylin 7y ago
Indeed! Veering (far) off topic, but I cannot resist posting this while we're on the topic of ducks: http://www.scholarpedia.org/article/Canards
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by kkylin 7y ago
- I like SideCar. After logging in and out of iCloud, it works just fine. - Having issue with Time Machine taking forever, but that seems to be more a Spotlight indexing issue. - Anyone else miss the iTunes Remote? I kinda like the new Mu
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by kkylin 7y ago
Also from a Perspective [1] in the same issue, which I also found useful: An imitation circuit Animals, including humans, rely heavily on imitation and social learning, yet we know little about how this process operates in the brain. Zhao e
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by kkylin 7y ago
I think the needs of grad students and researchers are highly field-dependent. I'm a mathematician, and I still use the library for older books. (Journal papers, even older ones, are mostly on-line now.) But my colleagues in e.g. bi
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by kkylin 7y ago
If you are ever in or near Tucson, AZ, the Pima Air & Space Museum ( https://pimaair.org/ ) has a full-scale X-15 mock-up as well as one of the B-52s used for launching the things. You can coordinate this with a bus tour
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by kkylin 7y ago
Anyone interested in this topic should be sure to follow the various links on the page. One of my personal favorites is the Compactness Theorem: https://en.wikipedia.org/wiki/Compactness_theorem .
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by kkylin 7y ago
More like nothing in particular grabbed me. Personal taste I suppose. Also I was fairly young when I first read it (very early teen?). I may feel differently about it now, though it’s been years since I’ve reread it so I don’t really know.
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by kkylin 7y ago
Yes, with the additional advice to try to get through the first 100 pages of Dune before judging -- it took me that long to really get into the story. Also I think Dune and Messiah were originally meant to be one book, and for whatev
346.
by kkylin 7y ago
Can't edit anymore, so two very minor corrections: "LGC" should have been "LGN" (had "RGC" and "LGN" both on my mind), and "disclaimer" should really have been "disclosure."
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by kkylin 7y ago
This work is about the very early steps of the primate visual pathway -- retina to LGC to the input layer of V1. Marr's opus is meant to be a much more wholistic view of the visual system. A more appropriate context for this article
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by kkylin 7y ago
Off-topic, but this discussion is reminding me of this (which some of you might enjoy): https://www.cs.princeton.edu/~appel/papers/conteq.pdf
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by kkylin 7y ago
To me, "back country" can mean many things, down to no trail and essentially no services. For example, when we backpacked in Denali many years ago, all we had for toilets were the shovels and biodegradable toilet paper we brought
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by kkylin 7y ago
Looks like the Wikipedia page on CTSS has a number of links: https://en.wikipedia.org/wiki/Compatible_Time-Sharing_System One should also know about ITS: https://en.wikipedia.org/wiki/Incompatible_
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by kkylin 7y ago
The constraint language described in SICP (AFAIK began as a paper by Gerry Sussman and Richard Stallman, continued in the PhD thesis of Guy Steele) is indeed an inspiration / precursor to Alexey's dissertation on propagators.
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by kkylin 7y ago
This looks really cool. Thanks!
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by kkylin 7y ago
Yes, Cosanti's definitely interesting. As is Arcosanti itself, if you can spare the time to drive out there (on the way from Phoenix to points north). https://arcosanti.org/ https://arcosanti.org/visit
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by kkylin 7y ago
I blame this mostly on Apple's human interface guidelines: https://developer.apple.com/design/human-interface-guideline... Scroll down to "Design Considerations": "Use the Touch Bar as an extension
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by kkylin 7y ago
Off-topic: I'm not an architecture buff and still found the (not-too-cheap) tour of Taliesin West well worth the time and money. Worth considering if you're ever in Scottsdale AZ.
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by kkylin 7y ago
One of Feigenbaum's best known contributions to the subject is a heuristic theory, based on renormalization group ideas borrowed from statistical mechanics, that explains the period doubling cascade and lets one calculate these constan
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by kkylin 7y ago
As an academic, I think that's a great first step. But there are many structural issues beyond this: advisors and students both under pressure to do whatever it takes to get the paper out and move on to the next project, students need
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by kkylin 7y ago
These exams often work by having the examiners ask questions until one reaches the boundary of the student's boundary, partly to see where that boundary is and partly to see how they handle things they do not know. Ideally, anyway. T
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by kkylin 7y ago
As others said, if you can post a link that would be really great. When I've taught probability in years past, I always showed students Galton boards on YouTube, but a real one that doesn't break and doesn't break the budget
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by kkylin 7y ago
I'm not sure how meaningful this analysis is. First, as others have noted, just having the word "professor" in the title doesn't mean much: both a full, tenured professor and an untenured, adjunct professor would have t

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