kkylin

8 ms·

61.
by kkylin 1y ago
A mathematical / computational model of the primate primary visual cortex
62.
by kkylin 1y ago
Indeed, the (quantum) harmonic oscillator Hamiltonian (with suitable scalings) commutes with the Fourier transform. Since the former has the Hermite functions as eigenbasis, the Hermite functions also form an eigenbasis for the latter.
63.
by kkylin 2y ago
Maybe. But at least in mammals, visual information processing is a very expensive operation that involves coordinated activity across many cortical areas. Vision being such a central sensory modality for birds, I do wonder if it was a st
64.
by kkylin 2y ago
Absolutely agree! I only added the comment lest yours be read too literally.
65.
by kkylin 2y ago
Agree with everything here, with one minor addition: talk not just to professors who might have industry ties, but everyone in your orbit with whom you have reason to think might help -- even those professors (or research scientists or post
66.
by kkylin 2y ago
And in yeast there has long been evidence for WGD. See, e.g., https://pmc.ncbi.nlm.nih.gov/articles/PMC4529243/ & references therein. Edit: I posted this without looking at the paper (which is about yeast).
67.
by kkylin 2y ago
For typical distances (say the height of a table or a shelf) the time should be on the order of a fraction of a second. There's a couple hundred ms delay in the human auditory + motor system, which is a sizable fration of the time you
68.
by kkylin 2y ago
As another comment mentioned, papers get revised during review, usually in response to reviewer comments. Also, some journals (not sure about Nature) do not allow authors to "backport" revisions made in response to reviewer comme
69.
by kkylin 2y ago
My kids' school used to let parents into the yard during dropoff and pickup. It was wonderful: a time for the kids to play with their friends and the parents to mingle and catch up. Now we have the car dropoff/pickup line. I&#x
70.
by kkylin 2y ago
As Feynman once said [0]: "Physics is like sex. Sure, it may give some practical results, but that's not why we do it." I don't think it's any different for mathematics, programming, a lot of engineering, etc. I ca
71.
by kkylin 2y ago
Every tool cuts both ways. This won't remove the need for people to be good, but hopefully reduces the scale of the problems to the point where good people (and better systems) can manage. FWIW while fraud gets headlines, unintentiona
72.
by kkylin 2y ago
Exactly. Exploiting the structure of the matrix (e.g., it is well approximated by a circulant matrix) is natural if there is structure to exploit. If everything in the preprint holds up, that might suggest some symmetries (e.g., approxima
73.
by kkylin 2y ago
It depends a bit on exactly what you want to calculate, but in general things like the probability density function of the solution of a stochastic differential equation (SDE) at time t satisfies a partial differential equation (PDE) that i
74.
by kkylin 2y ago
Not disagreeing there's bloat and inefficiencies at many US research universities, but something I think is missed in a lot of these discussions is that a lot of research funding works on a reimbursement basis: for relatively small thi
75.
by kkylin 2y ago
Thermal phenomena like heat transfer can arise in systems that are deterministic at the microscopic level. Indeed, at the time of Boltzmann (pre quantum) one of the major questions is how to go from deterministic but complex & unpredic
76.
by kkylin 2y ago
We were happily surprised to find Tower Records in Tokyo! It was great.
77.
by kkylin 2y ago
One can still define a map by taking the fractional part of the matrix-vector product, but the resulting map won't be continuous (with respect to the topology of the torus). In addition, if one wants the map be a homeomorphism (contin
78.
by kkylin 2y ago
Not just long hours right? Speaking to Taiwanese friends involved in semiconductor work (not TSMC employees though) it's the shift work that's really hard to manage in the US.
79.
by kkylin 2y ago
Here is the full list of this year's awardees: https://new.nsf.gov/honorary-awards/national-medal-science#n... (Also includes National Medal of Technology and Innovation.) And if you ever get the chance to hear Da
80.
by kkylin 2y ago
Side comment: anyone interested in calculus via infinitesimals may also be interested in taking a look at Radically Elementary Probability Theory by Ed Nelson: https://web.math.princeton.edu/~nelson/books/rept.pd
81.
by kkylin 2y ago
Maybe for teeny weeny keys -- the 50e6th prime number is ~30 bits?
82.
by kkylin 2y ago
Why "asdf..." and not "jkl;..." I wonder? Is it because more people are right-handed and their right hand is presumably on a mouse or coffee mug or something like that?
83.
by kkylin 2y ago
I have known plenty of parents who, as you suggest, do not try. We ourselves have tried various tactics, but sometimes the children just absolutely refuse. And the thing about cleaning up is that the person with the highest tolerance for
84.
by kkylin 2y ago
Good point! though my comment about the native code compiler being broken still applies to the brew-installed version
85.
by kkylin 2y ago
For anyone wishing to try: the maintainers of MIT Scheme no longer provide a .dmg but you can download and build the x86_64 version of MIT Scheme. The current release (v12.1) works on a Mac running Sequoia with Intel CPU or on Apple silico
86.
by kkylin 2y ago
Yes, but after you get used to it, CADR, CADDR, etc are just a lot easier (and logical!) than SECOND, THIRD, ...
87.
by kkylin 2y ago
Possibly both. I've certainly observed mosquitos biting people who say they don't get bitten -- they just don't notice, which may not be a good thing.
88.
by kkylin 2y ago
Too late now to edit my original comment, but I should have added that I was talking very specifically about the Proceedings of the National Academy of Sciences (as was Hopfield).
89.
by kkylin 2y ago
National Academy members still get to pick the reviewers (if they choose to go that route rather than regular submisssion), and the review is not blind. The reviews themselves are not public, but the identities of the reviewers are made pu
90.
by kkylin 2y ago
Agree with your point. The actual title, "If the Universe Is a Hologram, This Long-Forgotten Math Could Decode It," has another issue: physicists may have "forgotten" operator algebras, but it's certainly been a ver

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