Monthly Archives: June 2008

4.3 Paul Graham

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LISP writer Paul Graham has written an essay called “How to do what you love”, giving some practical advice.

There are three main points, for me, in the essay:

  1. Do not feel guilty about not doing some boring jobs.

  2. Have a habit of doing good work in your current job, whether it is your favourite.

  3. Always produce in your favourite area, whether it is your current job.

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4.3.1 Do not feel guilty about not doing some boring jobs

Sometimes, I faced some boring work. When I wanted to get rid of it, I had a thought: “Someone has to do it anyway. If I do not do it, someone else will have to. That means I am wasting other people’s time. I will feel guilty about that.”

Now I do not think in that way. If I choose not to do a job, the number of people available for that job will decrease. That means the price to get a person to do the job will rise. Then the person who has chosen that job will get a higher salary. So, instead of wasting his time, I make him earn a higher salary.

If a job is so boring that it is virtually impossible to get any human being to do it, people will create a machine to get the job done.

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2008.06.30 Monday \copyright CHK^2

Chapter 4 Master

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Two roads diverged in a wood, and I-
I took the one less traveled by,
And that has made all the difference.

— Robert Frost

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4.1 Autobiography

每一個人也是，自己自傳的主角.

— Me, inspired by Mr. Lee

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4.2 根據地

Select one single thing that you are the best in the world, stand firmly on it, and then move the whole world.

— Me, based on Archimedes and Mr. Lee

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e.g. Google had only one function — the search function. It did the very best for the search engine. Once it started to dominate, it expanded its functions, such as Gmail and Google Calender, based on its search technology.

Google’s own words on Google’s Philosophy page:

It’s best to do one thing really, really well.

Google does search. With one of the world’s largest research groups focused exclusively on solving search problems, we know what we do well, and how we could do it better. … Our dedication to improving search has also allowed us to apply what we’ve learned to new products, including Gmail, Google Desktop, and Google Maps.

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2008.06.25 Wednesday \copyright CHK^2

在那一年

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中五 Last Day (一)

網誌分類: fan club 眾人 blog! | 網誌日期: 2007-03-23 01:41

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轉眼, 幾個小時後, 我們的 last school day 就來了。
無論如何冷血，我都有一點傷感，有點捨不得。
在這學校待了5年，或多或少，無論我多不喜歡這學校的作風，
我也早已承認我是[這間學校]的學生。
我真的捨不得的，是這兒的人和事。
真不想，8:00到來，上最後的一天課。

哈利字

[]　會 last forever 的。

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2008.06.24 Tuesday \copyright CHK^2

R2

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- The biggest cause of trouble in the world today is that the stupid people are so sure about things and the intelligent folks are so full of doubts.

- In view of the stupidity of the majority of the people, a widely held opinion is more likely to be foolish than sensible.

— Bertrand Russell

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2008.03.06 Monday CHK_2

2.4.2 Newton, Leibniz, Einstein

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Newton

Two distinct views exist on the meaning of time. One view is that time is part of the fundamental structure of the universe, a dimension in which events occur in sequence. This is the realist view, to which Sir Isaac Newton subscribed, in which time itself is something that can be measured.

Leibniz

A contrasting view is that time is part of the fundamental intellectual structure (together with space and number) within which we sequence events, quantify the duration of events and the intervals between them, and compare the motions of objects. In this view, time does not refer to any kind of entity that that objects “move through”, or that is a “container” for events. This view is in the tradition of Gottfried Leibniz and Immanuel Kant, in which time, rather than being an objective thing to be measured, is part of the mental measuring system.

Einstein

Many fields avoid the problem of defining time itself by using operational definitions that specify the units of measurement that quantify time. Regularly recurring events and objects with apparent periodic motion have long served as standards for units of time. Examples are the apparent motion of the sun across the sky, the phases of the moon, and the swing of a pendulum.

— Wikipedia

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2008.06.22 Sunday CHK_2

傷逝 2

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網誌分類: 播種心田 | 網誌日期: 2007-03-19 06:08

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故人猶如江水逝
歲月無情不留痕
一日難處一日當
莫為昔日未來愁
明日愁來明日憂

— 佚名

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2008.06.21 Saturday CHK_2

因果網絡也

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2.4 Pure Definition

2.4.1 What is Time

Time is a subtle concept. In this section, we get a proper definition of time. We begin with Newton and Leibniz.

As the creators of calculus, Newton and Leibniz are famous rivals. On the nature of time, they had completely opposite views. For Newton, time (and space) is the stage for events to happen. Time is something real in itself.

For Leibniz, time is not a real substance. Time is just a bookkeeping system to relate different objects and different events. Time is a system of relations.[3]

For example, consider the statement “the cloud is higher than the ground.” The cloud is an object. The ground is another object. But “higher than” is not an object. Instead, it is a relation between objects.

— Me

[3] The Elegant Universe Appendix

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2008.06.19 Thursday \copyright CHK^2

離

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網誌分類: 播種心田 | 網誌日期: 2007-03-15 22:52

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今當遠離

臨表涕泣

不知所云

— 孔明

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AD02007.03.15

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共1個回應

harry 2007-03-18 19:54

梨子腹內酸

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2008.06.18 Wednesday \copyright CHK^2

2.3.2 As time goes

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Wisdom and Next

Is there anything higher than wisdom? If yes, what is the process of going from wisdom to there?

Dying. (This can be trivial. When you age to a certain extent, you die.)

data_and_information

Then what is Next?

How can I know? I have not died yet!

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2.3.2 As time goes

— 時光流逝
— 歲月蹉跎
— 人海浮沉
— 物轉星移
— 滄海桑田

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2008.06.16 Monday \copyright CHK^2

2.3 Statistics

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2.1.3 Collections and recollections

2.2 Dispersion
2.2.1 Why is there dispersion
2.2.2 Guided reading

2.3 Statistics

2.3.1 What is statistics

Data Statistics Information Studying Knowledge Aging Wisdom Dying Next What is Next

Data and Information

First, differentiate data and information: Data is raw. Data have no meaning. Information is processed data. Information has meaning. The process to transform data to information is statistics.

Information and Knowledge

Information is at higher level than data.

What is higher than information?

Knowledge.
What is the process of transforming information to knowledge?

Studying. (or AI for computers)

If you want a lot of mathematics information, just buy 50 maths books, then you get a lot of information. But if you want a lot of mathematics knowledge, you have a lot of hard work to do.

Knowledge and Wisdom

After knowledge, what is next? Wisdom.

What is the process of transforming knowledge to wisdom?

Aging.
If you want to have a lot of knowledge, buy a lots of books, read them and read them well. But if you want to have a lot of wisdom, you need to live your life for a long time or a long long time.

Wisdom and Next

Is there anything higher than wisdom?

If yes, what is the process to go from wisdom to there?

Dying. (This can be trivial. When you age to a certain extent, you die.)

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2008.06.11 Wednesday \copyright CHK^2

Archive

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網誌日期: 2007-03-12 21:11 | 網誌分類: Physicist

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2007-2009: Physics Reloaded

1.    Quantum Mechanics II

2.    Solid State Physics

3.    Solid State Theory

4.    Classical Electrodynamics

5.    Electromagnetic Theory and Optics

6.    Computational Physics

There are another two [more] courses. But I do not remember [them] right now.

To be continued…

2007.03.12

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2008.06.10 Tuesday \copyright CHK^2

N

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痛苦

唯有經過地獄的磨難，才有創造天堂的力量。

在極端痛苦中，一個靈魂為了承受這份痛苦，將會發出嶄新的生命光輝。就是這股潛力，在新生命力的發揮，使人們遠離在極端痛苦時，燃起的自殺念頭，讓他得以繼續活下去。他的心境將別於健康的人。他鄙視世人所認同的價值觀，從而發揮昔日所未曾有過的，最高貴的愛與情操，這種心境是曾體驗過，地獄烈火般痛苦的人所獨有的。

— 尼采

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2008.06.09 Monday CHK_2

2.1.2 Chemical Physics and Physical Chemistry

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Chemical physics is a subdiscipline of physics that investigates physicochemical phenomena using techniques from atomic and molecular physics and condensed matter physics; it is the branch of physics that studies chemical processes from the point of view of physics. While at the interface of physics and chemistry, chemical physics is distinct from physical chemistry in that it focuses more on the characteristic elements and theories of physics. Meanwhile, physical chemistry studies the physical nature of chemistry. Nonetheless, the distinction between the two fields is vague, and workers often practice in each field during the course of their research.

— Wikipedia

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2008.06.09 Sunday \copyright CHK^2

An atom

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網誌分類: Physicist | 網誌日期: 2007-03-11 22:52

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Stands at the sea …
wonders at wondering
I…
a universe of atoms
an atom in the universe.

— Richard Feynman

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2008.06.05 Thursday CHK_2

2.1.1 Mathematical and Theoretical Physics

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2.1.1 Mathematical Physics and Theoretical Physics

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The term ‘mathematical’ physics is also sometimes used in a special sense, to distinguish research aimed at studying and solving problems inspired by physics within a mathematically rigorous framework.

Mathematical physics in this sense covers a very broad area of topics with the common feature that they blend pure mathematics and physics. Although related to theoretical physics, ‘mathematical’ physics in this sense emphasizes the mathematical rigour of the same type as found in mathematics.

On the other hand, theoretical physics emphasizes the links to observations and experimental physics which often requires theoretical physicists (and mathematical physicists in the more general sense) to use heuristic, intuitive, and approximate arguments. Such arguments are not considered rigorous by mathematicians.

Arguably, rigorous mathematical physics is closer to mathematics, and theoretical physics is closer to physics.

— Wikipedia

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2008.06.03 Tuesday CHK^2