graycat

181 ms·

1111.
by graycat 7y ago
> IC to mean integrated circuits is a very common acronym, and right in the center of the HN focus. Wrong. IC is for hardware. The center of Hacker News is software, NOT hardware. Commonly the audience here works with software for hou
1112.
by graycat 7y ago
Here context is important: "Homemade Ice Cream" even on Hacker News is more likely the meaning than "Homemade Integrated Circuits". "IC Density and Moore's Law" is clearly about integrated circuits and not
1113.
by graycat 7y ago
Of course I came across IC some tens of thousands of times, from silicon, germanium, 1 micron down to 3 nanometers, Moore's law, Dennard scaling, static random access memory (SRAM), dynamic random access memory (DRAM), scanning-tunneli
1114.
by graycat 7y ago
No, not 99%. Why? Because a huge fraction, no doubt a huge majority, of the Hacker News audience concentrates on software. In more detail, a lot of the audience uses laptop computers, WiFi hubs, smartphones, etc. and never sees an integrat
1115.
by graycat 7y ago
But, from what I presented, you are saying that the DNA changes of the last 50,000 years happened essentially the same and independently in (i) Europe and (ii) Asia. Generally in evolution is it more likely that DNA twice the same is from a
1116.
by graycat 7y ago
I've been doing good work in computing for before most of the audience on Hacker News was born, and I'm still at it, e.g., with an ambitious Web site. From all my experience, far and away, the biggest bottleneck and ball and chain
1117.
by graycat 7y ago
See my post for essentially a "binary" interface: For my key-value store (I wrote because I thought that writing the code would be faster than understanding Redis, :-)), a client uses just standard TCP/IP sockets to send a b
1118.
by graycat 7y ago
Q. Interesting. For my Web site, I wrote a simple key-value store, I use for Web user session state, based on two standard .NET collection classes. My code is single threaded. Sure, multi-threading could be better, but with my code desi
1119.
by graycat 7y ago
By "min 3rd" you mean "minor 3rd", that is, an interval with 3 semitones? E.g., an example of a minor 3rd would be an A and the first C above that A? E.g., on violin could play the A the first A on the D string and the
1120.
by graycat 7y ago
> 40k years is between 1000 and 2000 generations. Why would it be unreasonable to think there could be significant genetic drift over that many iterations? Sure, it looks like there "could be". So what is interesting is the ev
1121.
by graycat 7y ago
40 K years sounds like a long time, but there's a lot of evidence that human DNA has hardly changed at all in that time. I.e., for making fancy bracelets, our ancestors back then were just as bright, artistic, etc. as we are now so th
1122.
by graycat 7y ago
Again, once again, over again, yet again, one more time, as I wrote: "I have zip, zilch, and zero first hand knowledge of Wittgenstein, but I will report on what two of my college profs said" Maybe a local community college will b
1123.
by graycat 7y ago
As I wrote, the class was Philosophy of Science The course prof suggested that a math prof teach the class. That was ALL right there in my original post. Again, once again, over again, yet again, one more time, just for you, as in my post a
1124.
by graycat 7y ago
I have zip, zilch, and zero first hand knowledge of Wittgenstein, but I will report on what two of my college profs said: In college, as a math/physics major, I relented and signed up for a course Philosophy of Science. The course was
1125.
by graycat 7y ago
The political stuff at the end was interesting. I noted the remark "there's money on the table ...". Obviously (i) there's a lot of politics in this subject and (ii) politics, with a lot of "hidden agendas" an
1126.
by graycat 7y ago
> Burning stuff [2,3] causes all sorts of effects on our environment, directly impacting health. It can; apparently in the US long it did; but a lot of the dirt got cleaned up. E.g., can have clean air even in LA and NYC with lots of
1127.
by graycat 7y ago
CO2 absorbs in three spectral lines out in the infrared, keeping the quantum mechanics and molecular spectroscopy simple, one line for each of bending, twisting, stretching of the molecule. The photons the CO2 absorbs are supposedly mostly
1128.
by graycat 7y ago
So your are saying that (i) the capital expense of a natural gas plant is cheap enough and (ii) the operating, marginal cost of the natural gas is expensive enough that at times it pays to idle the gas plant and use wind/solar? I smell
1129.
by graycat 7y ago
> This is independent of the method of power generation. Nope: I'm SURE you can see this, wind comes and goes often just hourly. A coal plant commonly can go years without so much as a single flicker in the power output. The co
1130.
by graycat 7y ago
To get very far in stochastic processes, usually need a good background in measure theory . Here is an overview of about two semesters in a fast, often rare, grad course plus much more: The integral of freshman calculus is the Riemann int
1131.
by graycat 7y ago
Usually! I gave a weak definition! Also, for correlation, need to assume the expectations exist.
1132.
by graycat 7y ago
The OP needs some correction: The title is "Gaussian Processes". Okay, so, we're considering "processes". A Gaussian process is a special case of a stochastic process . Here is the usual, first definition of a
1133.
by graycat 7y ago
Terrific. Excellent. Thx.
1134.
by graycat 7y ago
I really wasn't interested in the role of time. I was just struck that Rust was not a lot faster than C. Even with strcpy, malloc, free, etc. all compiled, C should still be slow due to essentially no support for arrays with more tha
1135.
by graycat 7y ago
> You appear to be making your points in a way in which no developments from the part 10-20 or so years are intruding. Can you point to a extant PL/I compiler that produces good code on modern architectures? How sure are you that th
1136.
by graycat 7y ago
Then they changed the language. C was not supposed to change.
1137.
by graycat 7y ago
I get it now: My view of HN just went down to the sewer: We're into the old, bitter, go out back and fight it out, religious computer language wars. And there C is one of the grand sacred subjects: C is the greatest. The greatest,
1138.
by graycat 7y ago
> It doesn't "cheat"; the semantics of the C standard library are just as much a part of the language as the rest. As I read K&R, strcpy, etc., where there, in a library of external functions, as a convenience and opti
1139.
by graycat 7y ago
I was not bringing up vectorization in Fortran. E.g., in Fortran we can have Real X(20, 30,40), all Call addall(X, 20, 30,40, all) and have Subroutine Addall (Z, L, M, N, Result) Real Z(L, M, N), All,
1140.
by graycat 7y ago
Soooo, those C compilers cheat on the language as defined in K&R etc.!!! WOW!! With that cheating, C gets to catch up with, say, what PL/I was doing with string manipulations in, say, 1969!!! So, this is the 50th anniversary!!

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