02 MAR 2019 by ideonexus
New Kind of Memory for AI
AI researchers have typically tried to get around the issues posed by by Montezuma’s Revenge and Pitfall! by instructing reinforcement-learning algorithms to explore randomly at times, while adding rewards for exploration—what’s known as “intrinsic motivation.”
But the Uber researchers believe this fails to capture an important aspect of human curiosity. “We hypothesize that a major weakness of current intrinsic motivation algorithms is detachment,” they write. “Wherein the a... 1 
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notes27 JUL 2018 by ideonexus
Fluid Intelligence has Made the Most Gains
So which kinds of intellectual performance have been pushed upward by the better environments of recent decades? Surprisingly, the steepest gains have not been found in the concrete skills that are directly taught in school, such as general knowledge, arithmetic, and vocabulary. They have been found in the abstract, fluid kinds of intelligence, the ones tapped by similarity questions (“What do an hour and a year have in common?”), analogies (“BIRD is to EGG as TREE is to what?”), and ...Folksonomies: intelligence iq
Folksonomies: intelligence iq
1 notes
notes08 MAY 2015 by ideonexus
The Social Network Political Bubble
In the growing social media space, most users encounter a mix of political views. But consistent conservatives are twice as likely as the typical Facebook user to see political opinions on Facebook that are mostly in line with their own views (47% vs. 23%). Consistent liberals, on average, hear a somewhat wider range of views than consistent conservatives – about a third (32%) mainly see posts in line with their own opinions.
But that doesn’t mean consistent liberals necessarily embrace ...Folksonomies: politics confirmation bias
Folksonomies: politics confirmation bias
1 notes
notesLiberals are more likely to defriend conservatives, but Conservatives are less likely to have liberal friends to defriend in the first place.
27 APR 2015 by ideonexus
Math Problem: How Long Until the Earth Falls Into the Sun?
Our earth has orbital motion, revolving once around the sun in about 365 days. Suppose that this orbital motion suddenly stopped completely, but everything else remained the same. How long would it take for the earth to plunge along a straight line into the sun?
[...]
Kepler's law applies to planetary orbits, whether they be of circular, or elliptical shape. It says that T22/T12 = R23/R13, where T is the period of an orbit and R is its semi-major axis. The semi-major axis is the average... 1 notes
notes08 MAR 2015 by ideonexus
College Tuition Becoming Unnaffordable
[Report from the National Center for Public Policy and Higher Education] found, published college tuition and fees increased 439 percent from 1982 to 2007 while median family income rose 147 percent. Student borrowing has more than doubled in the last decade, and students from lower-income families, on average, get smaller grants from the colleges they attend than students from more affluent families.
[...]
“The middle class has been financing it through debt,” he said. “The scenario ...
1 24 DEC 2013 by ideonexus
The Cost of Irrational Fears
Imagine the typical emotional reaction to seeing a spider: fear, ranging from minor trepidation to terror. But what is the likelihood of dying from a spider bite? Fewer than four people a year (on average) die from spider bites, establishing the expected risk of death by spider at lower than 1 in 100 million. This risk is so minuscule that it is actually counterproductive to worry about it: Millions of people die each year from stress-related illnesses. The startling implication is that the r...Garrett Lisi explains how the stress caused by many of our fears of statistically-unlikely events is more likely to kill us.
28 MAY 2013 by ideonexus
Shorter People Live Longer
The study was conducted to evaluate one aspect of the entropy theory of aging, which hypothesizes that aging is the result of increasing disorder within the body, and which predicts that increasing mass lowers life span. The first evaluation of the impact of human size on longevity or life span in 1978, which was based on data for decreased groups of athletes and famous people in the USA, suggested that shorter, lighter men live longer than their taller, heavier counterparts. In 1990, a study...5 years on average. Suggesting the medical community's focus on encouraging parents to grow big children is misguided as it may be shortening their lifespans.
08 APR 2013 by ideonexus
The Monty Hall Problem
Here’s how Monty’s deal works, in the math problem, anyway. (On the real show it was a bit messier.) He shows you three closed doors, with a car behind one and a goat behind each of the others. If you open the one with the car, you win it. You start by picking a door, but before it’s opened Monty will always open another door to reveal a goat. Then he’ll let you open either remaining door.
Suppose you start by picking Door 1, and Monty opens Door 3 to reveal a goat. Now what should y...You should always switch doors because you had a 1 in 3 chance of getting the right one the first time, and a 1 in 2 chance if you switch.
11 JUN 2012 by ideonexus
The Past and Future of the Mississippi
In the space of one hundred and seventy-six years the Lower Mississippi has shortened itself two hundred and forty-two miles. That is an average of a trifle over one mile and a third per year. Therefore, any calm person, who is not blind or idiotic, can see that in the old Oolitic Silurian Period, must a million years ago next November, the Lower Mississippi River was upward of one million three hundred thousand miles long, and stuck out over the Gulf of Mexico like a fishing-rod. And by the ...Folksonomies: speculation
Folksonomies: speculation
1 notes
notes"There is something fascinating about science. One gets such wholesale returns of conjecture out of such a trifling investment of fact."
08 JUN 2012 by ideonexus
The Importance of Giants
What, then, is it in particular that can be learned from teachers of special distinction? Above all, what they teach is high standards. We measure everything, including ourselves, by comparisons; and in the absence of someone with outstanding ability there is a risk that we easily come to believe that we are excellent and much better than the next man. Mediocre people may appear big to themselves (and to others) if they are surrounded by small circumstances. By the same token, big people feel... 1 notes
notesThey make the above average feel dwarfed.
