Encyclopædia Britannica

The preceding illustrates, simply but clearly, one of the proclivities that are often associated with mathematical thought: relatively simple concepts (such as integers), initially based on very concrete operations (for example, counting), are found to be capable of assuming novel meanings and potential uses, extending far beyond the limits of the concept as originally defined.

— Encyclopædia Britannica

— 31.12.2002



2022.09.27 Tuesday ACHK



... 中化口試


10k trimmer pot: 7.31k


3150, 4260: Samuel

3170: Danny, 達
3260: Dennis




2022.08.29 Monday (c) All rights reserved by ACHK





1: make car moving
2: make car stop itself
3: follow the track
4: change direction
5: tuning


CSCI3420 Project Phase 2

Deadline: 23:59




2022.08.03 Wednesday (c) All rights reserved by ACHK

ENGG 2011


ENGG 2011 - Advanced Engineering Maths - Assignment 1


C++: function(...)
            Many argument[s]


C++: mid-term test (31/10/2011)




2022.07.21 Thursday (c) All rights reserved by ACHK

ELEG 1110

ELEG 1110 – Basic Circuit Theory – Assignment 1

Due Date: 27/9/2011 (Tue)

Please submit your assignments in the collection box before the due time.

Please do not send soft copy to Prof. Choy or tutors.

The collection box is located on 3rd floor of Ho Sin Hang building, near room 321.

Please pay attention to submit the assignment to the collection box located at the second row, not the distribution box in the first row.



2022.07.06 Wednesday ACHK


CPU: Core 2 Duo 3.2 GHz / Core-I series
GPU: GeForce 9600 GT



2022.06.03 Friday ACHK

Calendar items

The calendar items are action triggers, not action plans, nor procedures.

— Me@2015-11-23 01:39:39 PM



2022.02.13 Sunday (c) All rights reserved by ACHK


sp332 414 days ago | link

You can still set rules. “All first-party Microsoft software will take 5 clicks to install. More than 5 and you need a sign-off from a VP.” Palm had a rule that it should take 3 taps to get anywhere on the system. They had a guy whose full-time job was to count taps for various actions.

2011.10.23 Sunday ACHK


My self-summary

I am a physicist by nature, an educator by miracle, and a writer by destiny. — Me@2010.09.21

What I’m doing with my life

Transforming myself by transforming other people’s lives. — Me@2010.09.21

I’m really good at

… being amazing. — Me@2010.09.21

The first things people usually notice about me

I am always with my Palm computer. — Me@2010.09.21

Favorite books, movies, shows, music, and food


Life is Beautiful(一個快樂的傳說)

Back to the Future(回到未來)

— Me@2000

I spend a lot of time thinking about

Physics and Love

Dear Mrs. Chown,

Ignore your son’s attempts to teach you physics. Physics isn’t the most important thing. Love is.

Best wishes,
Richard Feynman

— Me@2010.09.21

The most private thing I’m willing to admit

The secret to creativity is knowing how to hide your sources.

— Albert Einstein

You should message me if

… you are curious about the world and you value joy, truth, beauty and justice more than “success”.

— Me@2010.09.21, Based on Richard Stallman



2011.03.05 Saturday (c) ACHK