Technology

A new kind of camera, which allows you to take the photo now, and focus later at any point you like. There is demo in the web.

The principle is that, you record not the sum of all the light cones, but the individual light ray's vector direction. So that you can focus to any plane by ray tracing method.

昨天看了一套教人深思的電影 - 〈Three Idiots〉，故與大家分享一下。快樂、生活、學習，其實都可以是很簡單的。

http://www.tudou.com/programs/view/h5RvIAx0sTU/

This is what education truly mean, to have fun and excitement during the pursuit of excellence.

Unblock me is a puzzle game in iphone. It's originated from rush hour. I am interested in solving the board game using computer. I can enter the board configuration into the computer one by one, but I would like to do it automatically. With image processing capatibability in Mathematica, the process can be done rather easily by taking screenshot.

A package is released as open source project in GoogleCode/MathOO-packages. The aim of the project is to provide basic utilities and basic classes using MathOO, so that you can use it in an object oriented way. In the initial release, 1.0b, a dictionary class (associated array) is provided.

This document is a documentation of the dict class in MathOO-packages. Basically it behaviors very similarly to Python dict.

It is a documentation of MathOO, listing most of its functions and usage.

Portable Ubuntu Remix is a linux distro working on Windows using Colinux. For the latest version Portable Ubuntu Remix TRES, the Cygwin/X cannot be started due to some errors. And this how-to provides a solution to the software bug.

This is a short how to about how to sum sin(n q) and cos(n q).