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Submission + - Why Standard Deviation Should Be Retired From Scientific Use (edge.org) 1

An anonymous reader writes: Statistician and author Nassim Taleb has a suggestion for scientific researchers: stop trying to use standard deviations in your work. He says it's misunderstood more often than not and also not the best tool for its purpose. 'It is all due to a historical accident: in 1893, the great Karl Pearson introduced the term "standard deviation" for what had been known as "root mean square error." The confusion started then: people thought it meant mean deviation. The idea stuck: every time a newspaper has attempted to clarify the concept of market "volatility", it defined it verbally as mean deviation yet produced the numerical measure of the (higher) standard deviation. But it is not just journalists who fall for the mistake: I recall seeing official documents from the department of commerce and the Federal Reserve partaking of the conflation, even regulators in statements on market volatility. What is worse, Goldstein and I found that a high number of data scientists (many with PhDs) also get confused in real life.'

Submission + - To OLPC or not to OLPC (laptop.org)

koubalitis writes: A friend of mine, an elementary school principaly in Greece, has asked me to help him evaluate the following situation, An ex student of the elementary school, now in his 70', wants to make a donation in the form of computer laptops. He is willing to buy a laptop for every student in the school, arround 150. He suggested getting OLPCs which cost arround 250-280euros per piece (including shipping and import taxes) but he is open to other alternatives. The principal gave me a sample OLPC XO-4 unit for evaluation. The truth is i wasn't impressed. It doesn't have support for Greek (UI or keyboard layout), the screen is too small, it feels too slow and the whole environment is too restrictive. On the other hand i liked the ruggedized plastics and the battery life. 300euros can get you a descent 11'' dual core netbook with linux preinstalled . So the question is this. Should we go for the OLPC or an alternative netbook/laptop/tablet? Does any slashdoter have experience with OLPCs?

Submission + - "Permissionless Innovation" or Why You Have No Privacy (realcleartechnology.com)

An anonymous reader writes: Why do apps take our information and sell it without our permission? Why is the Internet of Things a tangle of insecure devices? It all boils down to a theory — "permissionless innovation" whereby businesses and other innovators act first and apologize later. This piece explores what it is and whether, in the context of the Internet of Things, it's a danger.

Submission + - Why Birds Fly in a V Formation (sciencemag.org) 2

sciencehabit writes: Anyone watching the autumn sky knows that migrating birds fly in a V formation, but scientists have long debated why. A new study of ibises--where researchers took to microlight planes and recorded birds strapped with GPS in-flight--finds that these big-winged birds carefully position their wingtips and sync their flapping, presumably to catch the preceding bird’s updraft and save energy during flight.

Comment Re:Test scores (Score 3, Interesting) 715

> I have found that what makes a good school here in a California school district is the PRINCIPAL

I'll second that sentiment.

My son's primary school had a bullying problem bad enough that it made the papers. The principal retired and a new principal brought in. Within a two years, it was a different school, and within three, she was getting the pick of teachers across Toronto any time there was a vacancy because teachers were desperate to work with a principal that was active, knew every student's name and personality, and most importantly of all, supported the teachers when parents were being difficult.

It took an amazing amount of work on her part, but she *made* the school. (The excellent teachers made the classrooms.) Watching her stand-down parents who wanted to make excuses for their child's bullying was eye-opening.

I was stunned when the grade 6 graduation speech by the students praised her specifically and at length for making them feel safe. When I went through primary school, the only students who even knew the principal's name were the troublemakers...

Comment Re:KODAK is actually a good example. (Score 1) 674

You are vastly more optimistic than I am. First, when a firm enters a totally new market, their odds of success are somewhat higher than a newcomer (better capitalization, better name recognition), but not *much* better. Lots of firms *could* have been Apple, but only 1 in a million succeeded. For a firm like Kodak, blessed with insane insight, I'd give it a 1 in 1,000 chance. Throw a multi-billion dollar company away on that chance? Not good management.

Now, more likely, they might have ended up like the camera division of the top two camera manufacturers together. In other words, still a shadow (in terms of profit) of what they were before (albeit still alive).

Once again, rational managers of successful companies keep milking for as long as possible. The number of firms that can successfully re-invent themselves is miniscule. (Well, less than 0.5% rounding down :-)). We all look at the successes, because they're around us. But let's remember the few hundred thousand firms that *don't* make it.

Comment Re:KODAK is actually a good example. (Score 1) 674

Agreed, but that *still* would have resulted in a much smaller company than Kodak at its prime, which is my point.

I don't know how many CEOs would have the guts to walk into the boardroom and say "it doesn't look like it now, but in five years, we're screwed. So we're going to spend all of our R+D to get people to stop paying us money (i.e. buying film, etc.). If we're successful (in a market segment we know nothing about), we'll be 1/10 our current size. If we're unsuccessful, we'll be dead in 2-3 years. And yes, to be successful, we'll need total buy-in from all levels of the company."

I do, however, know how many CEOs would still have their job after giving that pitch.

Comment Re:KODAK is actually a good example. (Score 2) 674

> Well, to be fair, Kodak screwed themselves as well... they pretty much invented digital photography, but utterly failed to capitalize on it.

Well, yes and no. If Kodak had forged ahead in the digital revolution, they might be around now, but 1/10th the size, and more importantly, they might have started their destruction many years earlier.

Most disruptive technologies are things that massively shrink the number of dollars coming into the market. People don't buy much more X, they just pay 1/10 the price. When that's the decision you're facing, it often doesn't make sense to lead the charge to disintegrate your market. Far batter to eke out a few more years as a major player and then go down in flames than survive as a shell of the former company.

How many CEOs are congratulated in taking a billion dollar company and bravely leading it into becoming a $100 million dollar company? If they hold on for five years before the little fish get sufficient funding and mind-share and then retire, they can easily be thought of as the decent CEOs who retired before "that idiot who lost the company" took the reigns.

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