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drauh

394 karma · joined January 12, 2013

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drauh··on How to Write a Spelling Corrector
By that reasoning, we should not teach kids how to spell, or about punctuation, and just aim for them writing essays/stories/novels.
drauh··on A bite of Python
I'm afraid I disagree. I programmed in a variety of languages in grad school (physics): C, C++, Fortran 77, Tcl, Perl, Matlab, Maple, Mathematica, IDL, Emacs LISP, etc. Not to mention the stuff I started on in high school.

When I switched my analysis to Python, I became so much more productive. And other science researchers I have known have echoed this sentiment. Even writing a C module to speed up my Python was pretty straightforward, if tedious.

Python had the fewest surprises. And debugging other people's Python is exponentially less annoying than debugging other people's Fortran or C. It's still my go-to language to get stuff done without fuss.

drauh··on Evidence Rebuts Chomsky's Theory of Language Learning
Because you're an English speaker?

In Malay it's "ball red large"

Also this has been making the rounds:

https://imgur.com/a/tDzy2

drauh··on A Theorem about Primes Proved on a Chessboard
Loren C. Larson; Mathematics Magazine Vol. 50, No. 2 (Mar., 1977), pp. 69-74
drauh··on How to Tell a Mother Her Child Is Dead
For some context, here is a map of poverty in Philly:

http://www.nytimes.com/newsgraphics/2014/01/05/poverty-map/

The hospital is in census tract 016300 with poverty level 58.5%

drauh··on Canadian surgeons urge people to throw out bristle BBQ brushes
Bristles are brass (alloy of copper and zinc; corrosion resistant, food-safe), and not magnetic.
drauh··on Born to Rest
Solution: Uber.
drauh··on Are Index Funds Eating the World?
From the article: A report this past week from investment firm Sanford C. Bernstein, titled “The Silent Road to Serfdom: Why Passive Investing Is Worse than Marxism,”

"serfdom", "Marxism"... Let me guess: Libertarian Party propagandist.

drauh··on Gene name errors are widespread in the scientific literature
The prevailing attitude is "I want to do biology, not computer science". I find it pretty frustrating. This is probably one of the last fields of science to be seriously computerized.
drauh··on Why Do We Judge Parents for Putting Kids at Perceived But Unreal Risk?
Like all questions, the answer is "depends". :)

E.g. number of kids falling and breaking their arm will be larger, but the population is larger and medical care is better, now. So, overall, I think the risks are actually lower than when I was a kid running around unsupervised.

I don't know about the number of pedophile predators per capita, but I imagine that may be a roughly fixed proportion of the population. Kids now also have cellphones, so that's a lifeline kids never had in the past. So, I'd imagine that percentage would not really rise, either.

drauh··on Python JITs are coming
For scientific work, I find it worth the effort to compile from source using Intel compilers + MKL (or a compiler + math library that can optimize well for your particular hardware platform).
drauh··on Why Do We Judge Parents for Putting Kids at Perceived But Unreal Risk?
Perception: there's a 75% chance my kid will be kidnapped by a pedophile. Reality: there's a 0.01% chance of the pedophile kidnap, but a 75% chance of drowning in the bathtub.

Numbers are made up.

Perception is not reality.

Another example: Trayvon Martin was a dark-skinned young male wearing a hoodie. Perception: he is a criminal casing the houses in order to commit a future crime. Reality: he was a kid walking home to his house.

Other examples: * Perception of the likelihood of terrorist attack, vs likelihood of dying in a fatal traffic crash.

* Perception that vaccinations cause autism, vs reality that vaccinations prevent fatal disease.

drauh··on It’s time to bring more realistic models of human behaviour into economic policy
The climate system on Earth is subject to the butterfly effect, but we frequently have good-enough predictions, e.g. the stuff airline pilots rely on.

When confronted with complexity, throwing up hands is not the correct response.

drauh··on Goodbye Mac OS Forge, hello GitHub
You need to split them, first. ;)
drauh··on What I learned as a hired consultant to autodidact physicists
Ditto. I went to grad school for physics, and pretty much all the code there is written by self-taught programmers. I was, too, to some extent, though I did take a grad level algorithms class. A lot of the code was pretty rough.

Indicative example. I was writing code to characterize the datastream from an instrument. It was a compiler of sorts: the end user could write some domain-specific language file to specify certain metadata to observe, e.g. power spectrum in a certain band, etc. These could be reused by other users so one could have a global standard for some state of the instrument. So, I decided on a hash table to store these user-written rules since it was a constant time lookup, and the characterization program ran real time while the instrument was running. Talking with a senior physicist who only wrote Fortran 77, he asked me why I didn't just use an array since "everything ends up being an array, anyway."

There are some things that one may not pick up just from practical experience.

drauh··on What I learned as a hired consultant to autodidact physicists
Sure: you're skillful, and you and your team can produce something of value.

However, you are not pushing frontiers in computer science. That's the key issue here: the physics autodidacts all think that they have an idea that can blow away several hundred years of well-tested scientific theory.

CERN and every single particle accelerator in the world can run only because Einstein's theory is taken into account.

GPS timekeeping works only because Einstein's work is taken into account.

drauh··on What I learned as a hired consultant to autodidact physicists
Would people argue over the proper treatment for cancer as prescribed by physicians and oncologists?

Don't answer that.

Physicists who need a little help with the math become experimentalist. JK. (I was an experimental physicist.)

Physics is already open in a real way. It's just that the natural language of physics is math. And people don't like math, for whatever reason.

Re dismissing things out of hand: unfortunately, sometimes the errors are so obvious that all it takes is one look to see that it's wrong. I mean, if it's easy for a practicing musician to identify a chord by ear, why should one think a physicist is arrogant if they can spot the error right away?

(See my other comments here on arguing about conservation of energy and momentum in an online forum.)

drauh··on What I learned as a hired consultant to autodidact physicists
It was a long forum discussion, and well over a dozen engineers, mathematicians, and physicists kept saying the same thing. Some wrong long (>500 word) posts. We were all ignored. This person was invested in the idea that they had an insight that centuries' worth of work had overlooked.
drauh··on What I learned as a hired consultant to autodidact physicists
Oh god. "Formula for primes" - I was involved in a way too long forum discussion where everyone involved was trying to convince the guy putting forth his idea for generating primes that he was merely going round in circles, proving and reproving identities.

As a former physicist, I think that math is way harder to talk about to laypeople, though there can be a wide variation in difficulty by subfield. Maybe number theory can be accessible, but analysis, say, would be pretty opaque. Not to mention some of the more exotic branches of math.

drauh··on FCC loses court battle to let cities build their own broadband
Yeah, I hear this all the time: "municipal broadband services would be anticompetitive", while ignoring the fact that there is a de facto monopoly in place and municipal broadband would actually introduce competition.

I noticed that line of argument seemed more common when I lived in the south (NC).

drauh··on FCC loses court battle to let cities build their own broadband
One can argue that a municipal government is a better representation of the people in the city (who want broadband) than some distant bureaucrat in the state capital. But this allows state to overrule municipal.
drauh··on FCC loses court battle to let cities build their own broadband
"Bottoms up" means that municipalities come before states, no? The smallest unit of government first.

But it seems like state gov'ts are blocking municipalities. [0]

[0] State of N. Carolina blocks municipal broadband: http://arstechnica.com/tech-policy/2015/05/north-carolina-su...

drauh··on High-Frequency Trading Is Nearing the Ultimate Speed Limit
QM does not open up any avenues for violating causality. bmeacham.com is crackpot based on my reading the first 2 paragraphs.

Usually, misunderstandings about causality come from a naive reading of the terms "advanced" and "retarded" solutions to wave equations, which also show up in classical electromagnetic theory.

https://en.wikipedia.org/wiki/Green's_function_(many-body_th...

drauh··on What I learned as a hired consultant to autodidact physicists
I've had my share trying to convince someone that a perpetual motion system they described did not conserve energy or momentum. They refused to believe my assertion that momentum and energy were conserved quantities.
drauh··on Street food chef's stall becomes world's first to earn Michelin star
The English refer to London as a "town". E.g. Town and Country Magazine (est.1769). [0]

[0] https://en.wikipedia.org/wiki/Town_and_Country_Magazine

drauh··on The Deconstructed Standard Model Equation
I have a PhD in physics, though not particle physics. QFT was required, since the methods appear all over in condensed matter physics.

Unfortunately, there is no real shortcut to being able to understand those terms except by studying one of the standard texts. And, physics being what it is, you can expect a pretty hard slog because the texts will assume you know first quantization back and forth. Add to that, it's not just QFT but the domain-specific standard model knowledge.

Dealing with QM requires PDEs, linear algebra, a fair bit of applied analysis (real and complex). Dealing with QFT requires that, plus learning a bunch of new techniques with the typical hand-wavy rigor of physics. (Hand-wavy compared to math.)

If you want to get a feel of the Standard Model without knowing QFT, the text I used when I took senior-level particle physics is great: Introduction to Elementa Particles, by David Griffiths. (He's an excellent writer, btw; I recommend any of his physics books).

As for the standard texts for particle physics, I'm afraid I've been out of the loop for too long to remember what books were used.

drauh··on The Deconstructed Standard Model Equation
When I was a wee undergrad, a grad student office-mate had printed out these equations and posted them on the office door. He wrote on it: The simplicity of the Standard Model. Or words to that effect; this was in the condensed matter physics division.
drauh··on Scipy Lecture Notes – Learn numerics, science, and data with Python
Fortran 77?
drauh··on Solving the Dating Problem with the SENPAI Protocol [pdf]
See Ashley Madison?
drauh··on Goodbye, Object Oriented Programming
Well, I don't know much about the photographer and artist tags, but he was credited as writer on a few movies.[0] The "teacher" bit may be because he ran a training session somewhere, or was a TA or tutor at some point.

But, yeah. I agree with you.

[0] http://www.imdb.com/name/nm1099939/

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