13 DEC 2018 by ideonexus

## A Minority of Users Account for Majority of Online Comments

In July, NPR.org recorded nearly 33 million unique users, and 491,000 comments. But those comments came from just 19,400 commenters, Montgomery said. That's 0.06 percent of users who are commenting, a number that has stayed steady through 2016. When NPR analyzed the number of people who left at least one comment in both June and July, the numbers showed an even more interesting pattern: Just 4,300 users posted about 145 comments apiece, or 67 percent of all NPR.org comments for the two month...
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04 NOV 2018 by ideonexus

## A Computer Algorithm for Randomization

Back in the early days of computers, one of the more popular methods of generating a sequence of random numbers was to employ the following scheme: 1. Choose a starting number between 0 and 1. 2. Multiply the starting number by 4 ("stretch" it). Subtract 4 times the square of the starting number from the quantity obtained in step 2 ("fold" the interval back on itself in order to keep the final result in the same range). 3.Given a starting number between 0 and 1, we can use the proce-dureâ...
Folksonomies: algorithms randomization
Folksonomies: algorithms randomization

From John Casti.

31 OCT 2018 by ideonexus

## Exercise Meaningful in Having Good Mental Health

In this cross-sectional study, we analysed data from 1â237â194 people aged 18 years or older in the USA from the 2011, 2013, and 2015 Centers for Disease Control and Prevention Behavioral Risk Factors Surveillance System survey. We compared the number of days of bad self-reported mental health between individuals who exercised and those who did not, using an exact non-parametric matching procedure to balance the two groups in terms of age, race, gender, marital status, income, education l...

31 OCT 2018 by ideonexus

## Bumper Sticker Computer Science

A few of my favorites, not found in the linked article: "There are two ways of constructing software. One way is to make it so simple that there are obviously no deficiencies. The other is to make it so complex that there are no obvious deficiencies." C.A.R. Hoare "The purpose of software engineering is to control complexity, not to create it." Dr. Pamela Zave "The most important single aspect of software development is to be clear about what you are trying to build." Bjarne Stroustrup "T...

31 OCT 2018 by ideonexus

## How a Nerd Walks Up the Stairs

Your steps should be in a cycle: short, long, long. Long in this case means a double step. Thus, you will cover five stairs in one short-long-long cycle. In addition, you should always start the first cycle on the same foot. Suppose you start on the left foot, then after two cycles you are back on the left foot, having covered ten stairs. While you are walking the stairs in this way, it is clear where you are in the cycle. By the end of the staircase, you will know the number of stairs modulo...

27 JUL 2018 by ideonexus

## Shannon and Thorp Hack the Roulette Wheel

It was in this tinkererâs laboratory that they set out to understand how roulette could be gamed, ordering âa regulation roulette wheel from Reno for \$1,500,â a strobe light, and a clock whose hand revolved once per second. Thorp was given inside access to Shannon in all his tinkering glory: Gadgets . . . were everywhere. He had a mechanical coin tosser which could be set to flip the coin through a set number of revolutions, producing a head or tail according to the setting. As a joke...
Folksonomies: play hacking gambling
Folksonomies: play hacking gambling

06 JAN 2018 by ideonexus

## Considering Art Creative but Engineering Not as a Questio...

In retrospect, Cohen and MacKeith made a number of questionable assumptions that undermine that conclusion. To be fair, these assumptions were quite common among psychologists at the time and still persist to a significant degree among the public. One of these assumptions is that some activities, such as the arts, are inherently creative, whereas others, such as science or engineering, are not. Another assumption is that creativity is a function of one's ability to fantasize, which is to say,...

22 NOV 2017 by ideonexus

## Removing Prepositions in Defining Thought

Having turned my back on propositions, I thought, what am I going to do about this? The area where it really comes up is when you start looking at the contents of consciousness, which is my number one topic. I like to quote Maynard Keynes on this. He was once asked, âDo you think in words or pictures?â to which he responded, âI think in thoughts.â It was a wonderful answer, but also wonderfully uninformative. What the hellâs a thought then? How does it carry information? Is it like ...

25 OCT 2017 by ideonexus

## CREW Method of Curation

CREW stands for Continuous Review Evaluation and Weeding, and the manual uses âcrewâ as a transitive verb, so one can talk about a libraryâs âcrewingâ its collection. It means weeding but doesnât sound so harsh. At the heart of the CREW method is a formula consisting of three factorsâthe number of years since the last copyright, the number of years since the book was last checked out, and a collection of six negative factors given the acronym MUSTIE, to help decide if a book has...
20 JUN 2017 by ideonexus

## Category Practice

Students appear to use a different kind of thinking when they create original patterns following rules they create (Grabowski, Damasio, & Damasio, 1998). Activities that engage students in building categories can start as early as preschool. Building category practice can be done with a bag of mixed buttons. After first modeling the procedure, you can have students work on their own or in pairs to sketch the categories they discover. Th is would also work as a language arts learning cente...