Society and Social sciences

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.

44 Challenging problems. Many are quite difficult, and tests if your physics understand is solid enough!

It is important to have the trading wisdom and develop skills to remain relevant in any investment climate in order to secure one’s financial future. Especially with the recent economic uncertainties and escalating political tension in the world, volatile markets seem to be here to stay.  As such, Phillip CFD organised a special presentation with Mr Ray Barros on 30^th April 2011 to help guide our clients on a step-by-step ...

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.

今年為自己做個股票牛熊買賣記錄，以 50k 現金作本，希望乘大浪而行，有心人歡迎交流觀點。

一月十日：

買入：66054 恆指牛，買入價 0.150，股數 100k。

上年持有： 1157.HK，買入價 16.00，股數 1600。

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.