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Comment: Re:Simple Solution (Score 1) 583

by CharlesEGrant (#35467380) Attached to: CS Profs Debate Role of Math In CS Education

Fiddlesticks! Baysean does not imply discrete. You are still going to have to learn about continuous distributions to do modeling with modeling with Bayesian models are applied to continuous variables. Look up Gaussian Bayesian networks for example. Furthermore if you are going to treat useful tools like the gamma function or MCMC as more than black boxes you are going to have to know calculus.

Comment: Re:What are the negative consequences? (Score 1) 436

by CharlesEGrant (#34001494) Attached to: Gosling Reacts To Apple's Java Deprecation

If you are a Java developer, you can run Java on your own server and provide an HTML5 interface on the client, or a Cocoa interface on Apple platforms. That is how Apple themselves use Java. Cocoa and HTML5 both have auto installs and auto updates built-in, and are therefore consistent with consumer use. Whatever is on the server can be as nerdy as you like, but what is on the client has to be consumer grade. Flash and Java are not consumer grade.

Understand that Apple makes consumer products.

Yeah, but keep in mind that Apple has also been selling itself for years into the academic and research communities, and a lot of us are using Java for number crunching because it is reasonably cross platform and reasonably performant. This screws that community big time. HTML5 and Javascript are irrelevant for what we're doing. Yes, we can install OpenJDK, but at this point that involves turning on X11, JRF licensing restrictions, or building from source. As a developer that's feasible, for our end users its not. It's Apple's call if they want to keep serving that market or not, but I'm certainly going to point out to them that I won't be spending $10,000/5 years on hardware from them in the future.

Comment: Re: Nonstandard notation (Score 1) 1268

by CharlesEGrant (#33244058) Attached to: US Students Struggle With Understanding of the 'Equal' Sign

I guess I can't argue with you about the overall success of the new math, but I have very fond memories of it. I was in third grade in 1965 and well remember the exercises in counting in base 2, base 8, and base 12 using popsicle sticks. I well remember the lightening flash of understanding: "Oh, there are numbers, and then there are the representations of numbers, and each number can have many representations". Then I switched schools, and math became an exercise in tedium until I got to college.

The "new math" taught in the 60s was designed by mathematicians. The new "new math" (AKA Discovery math) being taught today was designed by educational theorists. Maybe the new math of the sixties was only suitable for students who were going to go on to become mathematicians, computer scientists, or physicists, and only when taught by teachers who really understood the point of the material. From what I've heard of discovery math, it's only suitable for people who are never going to do any math, and who will rely on calculators for simple arithmetic.

Comment: Re:Cringley knows less about finance than tech (Score 1) 660

by CharlesEGrant (#29947448) Attached to: Nothing To Fear But Fearlessness Itself?

Only if one is stupid enough not to understand the limitations of Black-Scholes which only works under a huge pile of assumptions that exist in very narrow and rare circumstances. Black-Scholes isn't responsible for our current mess. Black-Scholes is an equation. It can be used wisely or unwisely. We can encourage wise use but sometimes we seem to need to learn things the hard way.

What you say sounds very reasonable, but I'm troubled by the reflexive denials I have been reading from quants and financial engineers. I've read comments from too many who move smoothly from lauding the money making power of their models and their own skill in applying them, to denying any culpability for the recent meltdown: "hey I'm just a geek with a model, nobody listens to me, and the traders do just what they want anyway". I don't think you can have it both ways. At the very least the models like VAR were used as a fig leaf to persuade folks that junk was AAA. If people knew that their models were being used inappropriately, then they had a duty to make a stink about it, even if it meant walking away from their bonus and stock options. A handful of folks did walk away from places Enron, Lehman, and Washington Mutual, crying bloody murder, so it is not an impossible standard to meet.

Comment: Re:Wow (Score 1) 318

by CharlesEGrant (#29480729) Attached to: Who Wants To Be a Billionaire Coder?

Well it is a matter of taste, but bear in mind that it doesn't say he's coding 12 hours a day, 365 days a year. He may very well be enjoying some of the more obvious pleasures in life along with his coding. Some folks would happily spend years laying naked on a Tahitian beach drinking Pina Coladas, other folks would find that nice enough for a week or two, but then want to go back something more engaged with world. There is a pleasure and satisfaction all its own in exercising skill, particularly if the product of your skilled work is in high demand from other folks who's work you respect and admire.

Comment: Re:IBM is a global business (Score 1) 812

by CharlesEGrant (#29165401) Attached to: IBM, Other Multinationals "Detaching" From the US

Even worse, I totally screwed up the story. The Nobel prize for the work on GMR didn't go to IBM, but to Grunberg at the Forschungszentrum Jülich, and Fert at the Université Paris-Sud, and . Mea culpa. IBM researchers from the IBM Almaden research center did win the 1997 Hewlett-Packard Europhysics Prize for work on GMR, along with Gruenberg and Fert.

Comment: Re:IBM is a global business (Score 1) 812

by CharlesEGrant (#29161305) Attached to: IBM, Other Multinationals "Detaching" From the US

IBM has stopped to innovate (sic)

Did they stop before or after the work which won the 2007 Nobel prize in physics, and is one of the technologies that make it possible for your average consumer to walk down to the corner office supply store and buy a 1 TB disk for less then $200?

Just because they aren't innovating in the fields you know about, doesn't mean they aren't innovating at all.

Comment: Re:Penmanship (Score 1) 921

by CharlesEGrant (#28832557) Attached to: 26 Years Old and Can't Write In Cursive

Do you ever write to your congress person? Any damn fool can send an email but a hand written letter gets their attention. They get so few of them they are treated as special especially by those on their staff who have never hand written a letter before.

Since the 2001 anthrax scare I think physical letters actually get diverted for inspection and irradiation and may not get to your congress person until well after any particular vote has been taken.

I'm also 50 and was taught Palmer method in a Catholic grade school. I never mastered it, and II retreated to block printing after high school. I've since heard that Palmer was an arbitrary and capricious choice, and that there are other handwriting styles, italic for example, that are easier to learn, and easier to write legibly, but retain some of the esthetics of calligrapphy.

Comment: Re:A myth ? (Score 1) 588

by CharlesEGrant (#28191889) Attached to: The Myth of the Mathematics Gender Gap

How come a 70/30 ratio makes this gap a myth?

Because 50 years ago the gap was > 95/5. The human nervous system hasn't changed much in fifty years, so surprise, surprise it turns out that cultural factors play a major role in the choice of education and occupation. And yes, there were folks 50 years ago who were happy to claim that the 95/5 ratio was the unavoidable result of the differences in the male and female brain.

Comment: Re:There is and always will be differences. (Score 2, Insightful) 588

by CharlesEGrant (#28191771) Attached to: The Myth of the Mathematics Gender Gap

Of course the statistical properties of groups don't tell you anything about the qualities of a given individual. Men are on average taller then women, but I'm male, and only 5'6" while one of my previous girlfriend was 5'10". I make my living in a mathematical field, and I work with plenty of women who are much better at math then me. The question is, when we see large group disparities between genders is it nature, nurture, or some combination of the two?

I did an undergrad degree in physics back in the early 1970s. At that time the number of women in upper-division math and physics classes was about 1/30th the number of men. I heard many folks explain this as a natural result of the innate differences between genders. I also heard several professors explicitly discourage women from taking upper division math and physics because it was not a "suitable" field for women.

In 2003 I went back to school to do an MS in Applied Math. I was surprised to see that women now made up between 1/5th and 1/3rd of the upper division and graduate classes. Furthermore, the women in the classes didn't seem to have any more trouble with the material then I did. I'm perfectly open to the idea that the distribution of talents in the two genders is influenced by neuro-development and anatomy, but human neuro-development and anatomy didn't change much between 1974 and 2003, which makes me think that the folks who ascribed the gender ratios in circa 1974 math classes entirely to intrinsic differences were full of shit.

Comment: Re:Not much of a threat (Score 2, Interesting) 469

by CharlesEGrant (#27983505) Attached to: The Dangers of Being Really, Really Tired

I don't this is something that happens often under circumstances people normally experience.

True, the context of the original article on Slate was the "enhanced interrogation techniques" practiced by the US on captured terrorists. According to the recently released memos interrogators were allowed to deprive subjects of sleep for up to 180 hours (7.5 days). The starting technique was to shackle them in a standing position so that if they fell asleep, their entire weight was born on their arms. After forty hours they had to shackle them lying down to avoid permanent damage to their circulatory system. I haven't read how they kept them awake while lying down, but I think we can assume they had sufficient resources and "creativity" to accomplish it. Definitely not a normal circumstance, but not just of academic interest either.

Comment: Re:Here's one reason the financial system failed. (Score 1) 379

by CharlesEGrant (#27841797) Attached to: The Coder Behind the Mortgage Meltdown

Well, there were cases of outright fraud, where the mortgage that was signed, was not the mortgage that was recorded. That kind of crude fraud was certainly not the cause of most of our mortgage problems. The trouble wasn't simply a lack of clarity in the terms of the loan, it was the terrible, self-serving advice peddled, by the brokers, real-estate agents, developers, home improvement networks etc. "Wait, I'm pretty sure I wouldn't be able to afford the payments on the loan after the rates reset." "Don't worry! You'll be out of this house, and on to your next house well before the rates reset. Real estate only goes up! This is an investment, you'll make a handsome profit, just by holding on to the house for two years." Doubtless many were as naive and clueless as the mortgagees, but may other knew better and were simply being predatory.

This ties into the article under discussion. The author relates a story about really want to move out of the back room and on to the trading floor. A friend who is a trader, asks him if he can completely dedicate himself to taking the money of people stupider then him.

Comment: Re:OMFG ... (Score 1) 695

by CharlesEGrant (#27726391) Attached to: US Declares Public Health Emergency Over Swine Flu

Endemic, in a broad sense, can mean "belonging" or "native to", "characteristic of", or "prevalent in" a particular geography, race, field, area, or environment; native to an area or scope.

I don't think endemic applies to the common cold, kthx

You missed a common usage in epidemiology:

Endemic (epidemiology), an infection is said to be "endemic" in a human population when that infection is maintained in the population without the need for external inputs.

This is the sense in which the common cold is endemic in human populations.

Comment: Re:OMFG ... (Score 1) 695

by CharlesEGrant (#27726059) Attached to: US Declares Public Health Emergency Over Swine Flu

but emergency makes people think real and immediate threat to themselves and panic.

What panic? Certainly my neighborhood was pretty calm this afternoon? Did you actually read the WHO statement? What did WHO say that was so panic inducing? I'm going to wash my hands a bit more frequently, and if I develop flu symptoms I'll probably stay home from work when ordinarily I'd probably tough it out.

I will certainly be concerned about it when it spreads to more than a statistically irrelevant portion of the population as a whole

And is your version of statistically significant based on anything more then your gut feeling? There are objective measures of statistical significance, it's not just enough matter of enough sick people that it would impress a casual observer.

Comment: Re:Lifeless (Score 2, Informative) 695

by CharlesEGrant (#27724607) Attached to: US Declares Public Health Emergency Over Swine Flu

Why do people discuss the 'flu' has if it where caused by a living organism? A virus is NOT alive.

Because the notions of "alive" and "not alive" are fuzzy human definitions only partially based in distinctive underlying natural phenomena. Key attributes frequently assigned to living things are metabolism and reproduction. Viruses reproduce, but in some sense have no metabolism. Historically, folks have gone back and forth over the years on whether both attributes are needed or only one. Eventually most folks realize they are arguing over a ambiguous border, and give it up.

In the context at hand it make a lot more sense to think of viruses as living. They reproduce, and are transmissible, which make an outbreak of a contagious virus look pretty much like an outbreak of a contagious bacteria, as opposed to a mass poisoning by a toxin.

"Any excuse will serve a tyrant." -- Aesop

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