Characteristic motions of common human-controlled devices

Characteristic motions of common human-controlled devices

from Inertial proprioceptive devices: Self-motion-sensing toys and tools by C. Verplaetse

Doctor Who Theme on eight floppy drives

Doctor Who Theme on eight floppy drives

윈도우로의 samba 접속이 안될때

firewall.cpl

고급에서 아래와 같이 Inbound 규칙중에 Netlogon 서비스를 켜주면 됨.

A Hopping Bionic Kangaroo

멋있다.

Differential pressure

• p(pearl) = 40%
• p(blue|pearl) = 30%
• p(blue|~pearl) = 10%
• p(pearl|blue) = ?

Differential pressure between the two conditional probabilities,  p(blue|pearl) and p(blue|~pearl) 의 개념

it's easier to see why the final answer depends on all three probabilities; it's the differential pressure between the two conditional probabilities,  p(blue|pearl) and p(blue|~pearl), that slides the prior probability p(pearl) to the posterior probability p(pearl|blue).

...

you can see that when the conditional probabilities are equal, there's no differential pressure - the arrows are the same size - so the prior probability doesn't slide between the top bar and the bottom bar.

In the frequency visualization, ... The bottom bar is shorter than the top bar, just as the number of eggs painted blue is less than the total number of eggs.

The gif file created from the applet at http://yudkowsky.net/rational/bayes

Stupid Smart Stuff - "a dangerous myth"

Interesting article by Prof. Don Norman

Stupid Smart Stuff: Watches and Automation :

How silly. The notion that we can have automated or semi-automated cars as long as the driver is watching over them is a dangerous myth. 

It is a myth that people can maintain control when they have nothing to do for a long period.

This myth is well understood in the military and in commercial aviation. 

http://networkedblogs.com/UA6IZ

use it or lose it

신경가소성

우리의 마음과 지능을 구성하는 뇌의 신경망은 외부 자극에 의해 끊임없이 바뀐다. 이를 ‘신경가소성’이라 말한다. 신경가소성의 기본적인 원칙은 ‘쓰면 발달하고 그러지 않으면 잃는다’(use it or lose it)는 것이다. 인간의 뇌를 구성하는 회로는 고정된 것이 아니라 우리가 하는 행동과 받는 자극에 따라 끊임없이 변한다는 게 다양한 연구 결과로 뒷받침되고 있다.

http://www.hani.co.kr/arti/society/society_general/617907.html
http://en.wikipedia.org/wiki/Neuroplasticity

Floppy music DUO - Imperial march

forgetting curve

The forgetting curve hypothesises the decline of memory retention in time.

From the lab seminar of HRI group.
http://en.wikipedia.org/wiki/Forgetting_curve

CC3Mesh in Cocos3D

/*
 * /cocos3d/cocos3d/Meshes/

 * CC3Mesh is an abstract class. Subclasses can be created for loading and managing

 * meshes from different sources and third-party libraries.

 */

@interface CC3Mesh : CC3Identifiable {

CC3FaceArray* _faces;

CC3VertexLocations* _vertexLocations;

CC3VertexNormals* _vertexNormals;

CC3VertexTangents* _vertexTangents;

CC3VertexTangents* _vertexBitangents;

CC3VertexColors* _vertexColors;

CC3VertexTextureCoordinates* _vertexTextureCoordinates;

CCArray* _overlayTextureCoordinates;

CC3VertexMatrixIndices* _vertexMatrixIndices;

CC3VertexWeights* _vertexWeights;

CC3VertexPointSizes* _vertexPointSizes;

CC3VertexIndices* _vertexIndices;

GLfloat _capacityExpansionFactor;

BOOL _shouldInterleaveVertices : 1;

}

...

Cauchy-Lorentz Distribution

Cauchy-Lorentz distribution has "heavier tails" than the Gaussian distribution.

Implementation in Boost library:
http://www.boost.org/doc/libs/1_36_0/libs/math/doc/sf_and_dist/html/math_toolkit/dist/dist_ref/dists/cauchy_dist.html

Too many simulators

Too many simulators !!!

AR Box

새로 가공한 AR Marker 상자.

Cholesky Decomposition

CholeskyDecomposition의 결과 return code.

struct btCholeskyDecomposition
{
  enum Result
  {
    SUCCESS,
    FAILURE_SYMMETRY,
    FAILURE_POSITIVE_DEFINITE
  };
};