16 APR 2018 by ideonexus

## Gaming Produces a Meditative State

Your brain, in other words, may not consent to be trained. But t will improve a few of these key skills if you let it enjoy a few hours of the first-person shooter BioShock. Recent research, the 2012 re noted, has revealed action games' positive effects, not just on attentional control and emotional regulation, but also on decision making, "mental rotation" (the ability to create a mental image of m object and manipulate it in three dimensions), and the ability to switch rapidly between compe...

17 AUG 2016 by ideonexus

## Ways of Being "Good at Math"

It’s a common misconception that someone who’s good at math is someone who can compute quickly and accurately. But mathematics is a broad discipline, and there are many ways to be smart in math. Some students are good at seeing relationships among numbers, quantities, or objects. Others may be creative problem solvers, able to come up with nonroutine ways to approach an unfamiliar problem. Still others may be good at visually representing relationships or problems or translating from one ...
Folksonomies: education mathematics
Folksonomies: education mathematics

31 MAY 2015 by ideonexus

## Beyond Three Dimensions

“In One Dimensions, did not a moving Point produce a Line with two terminal points? In two Dimensions, did not a moving Line produce a Square wit four terminal points? In Three Dimensions, did not a moving Square produce - did not the eyes of mine behold it - that blessed being, a Cube, with eight terminal points? And in Four Dimensions, shall not a moving Cube - alas, for Analogy, and alas for the Progress of Truth if it be not so - shall not, I say the motion of a divine Cube result in...

31 MAY 2015 by ideonexus

## Flatland Science: Dimensions

What and where is Flatland? A Square gives us several interesting answers, many of th contradictory. We know that it’s flat, big (but how big?), and very thin, the most important question of all is “how thin?” A lot depends on the answer… A Square himself eliminates the version that’s easiest for three-dimensional readers to understand; a world that’s thin – maybe only a few atoms thick - but nevertheless has some physical height. It would have some sort of solid or semi-solid ...
Folksonomies: science fiction otherness
Folksonomies: science fiction otherness

31 MAY 2015 by ideonexus

## Anthropologization

. 'Anthropologization' is the great internal threat to knowledge in our day. We are inclined to believe that man has emancipated himself from himself since his discovery that he is not at the centre of creation, nor in the middle of space, nor even, perhaps, the summit and culmination of life; but though man is no longer sovereign in the kingdom of the world, though he no longer reigns at the centre of being, the 'human sciences' are dangerous intermediaries in the space of knowledge. The tru...

20 JUN 2013 by ideonexus

## Relative Sizes of Structures in the Brain

Linear measure- ments and dimensions generally are given in microns or micrometers (µm) (1 µm equals one- millionth of a meter) or nanometers (nm) (1 nm or millimicron equals one-billionth of a meter). About 240,000 µm equal one inch. As a reference, the following are the dimen- sions of some non-neural structures: human ovum, 100 µm; cross-section of a skeletal muscle fiber, 10-100 µm; erythrocytes, 8–10 µm; bacteria, 0.1–8 µm; and viruses, 0.15–0.5 µm. Cell bodies of neurons...
Folksonomies: size neurology microscopy
Folksonomies: size neurology microscopy

Interesting to see how they compare to the sizes of other small objects.

11 JUN 2012 by ideonexus

## The Archeologist's Search Image

A fossil hunter needs sharp eyes and a keen search image, a mental template that subconsciously evaluates everything he sees in his search for telltale clues. A kind of mental radar works even if he isn't concentrating hard. A fossil mollusk expert has a mollusk search image. A fossil antelope expert has an antelope search image. ... Yet even when one has a good internal radar, the search is incredibly more difficult than it sounds. Not only are fossils often the same color as the rocks among...
Folksonomies: fossils archeology
Folksonomies: fossils archeology

Varies from hunter to hunter, but must be able to find camouflaged bones that might be fragmented into many pieces.

01 JUN 2012 by ideonexus

## Dissecting Crystals

A casual glance at crystals may lead to the idea that they were pure sports of nature, but this is simply an elegant way of declaring one's ignorance. With a thoughtful examination of them, we discover laws of arrangement. With the help of these, calculation portrays and links up the observed results. How variable and at the same time how precise and regular are these laws! How simple they are ordinarily, without losing anything of their significance! The theory which has served to develop th...

Hauy describes learning the secrets of their structure.

17 MAY 2012 by ideonexus

## Engineering Requires Science

Engineering is quite different from science. Scientists try to understand nature. Engineers try to make things that do not exist in nature. Engineers stress invention. To embody an invention the engineer must put his idea in concrete terms, and design something that people can use. That something can be a device, a gadget, a material, a method, a computing program, an innovative experiment, a new solution to a problem, or an improvement on what is existing. Since a design has to be concrete, ...
Folksonomies: science engineering
Folksonomies: science engineering

Science passively observes, but Engineering must discover what it needs in order to make progress.

13 DEC 2011 by ideonexus

## Stable Orbits are Impossible in More Than Three Dimensions

If one assumes that a few hundred million years in stable orbit are necessary for planetary life to evolve, the number of space dimensions is also fixed by our existence. That is because, according to the laws of gravity, it is only in three dimensions that stable elliptical orbits are possible. Circular orbits are possible in other dimensions, but those, as Newton feared, are unstable. In any but three dimensions even a small disturbance, such as that produced by the pull of the other planet...
1  notes

The force of gravity gets weaker the more dimensions you add to the Universe, making stable planetary orbits impossible.