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Inactivity as intelligent
* We don’t get paid for activity, just for being right. As to how long we’ll wait, we’ll wait indefinitely.
o 1998 Berkshire Hathaway Annual Meeting
— Warren Buffett
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2010.06.25 Friday
Author Archives: rpflee
間時間表（前傳）
Half an Hour 2.5
Timetable for high school study 10.4
這段改篇自 2010 年 2 月 7 日的對話。
| Monday | Tuesday | Wednesday | Thursday | Friday | |
| 3 hours | Physics | Applied Maths | Pure Maths | Physics | Applied Maths |
| 1 hour | Chinese | English | Chinese | English | Chinese |
| 1 hour | |||||
| 3 hours | Pure Maths | Physics | Applied Maths | Pure Maths | Physics |
以上就是「自動時間表」的「基本設定」。在「基本設定」之上，你需要再加一些重要細節。
| 3 hours | Physics |
一個正常人在一般的情況下，很難可以連續專心思考三小時。所以，我建議你把「三小時的一格」間開（分割）成「六格半小時」，然後每次只要求自己連續集中思考半小時。
| 30 minutes | Physics |
| 30 minutes | Physics |
| 30 minutes | Physics |
| 30 minutes | Physics |
| 30 minutes | Physics |
| 30 minutes | Physics |
如果你不用這個方法的話，那三個小時通常也會這樣度過：第一格用來去洗手間；第二格用來去冰箱拿東西吃；第三格用來接電話；第四格用來執拾書桌；第五格用來內疚；第六格用來傷心。
| 30 minutes | 去洗手間 |
| 30 minutes | 去廚房 |
| 30 minutes | 接電話 |
| 30 minutes | 執拾房間 |
| 30 minutes | 內疚 |
| 30 minutes | 傷心 |
（LWT etc：哈哈 … ）
你們笑，即是有共鳴。有共鳴，即是平時也是這樣浪費時間的。那又毋須過份責怪自己，因為年青人都是那樣的。我自己年青時，也是那樣的。
要盡量避免這個情況的話，你可以用這個「程式」（機械程序）：
第一，把「三小時的一格」間開成「六格半小時」，每次只要求自己連續集中思考半小時。
| 30 minutes | Physics |
| 30 minutes | Physics |
| 30 minutes | Physics |
| 30 minutes | Physics |
| 30 minutes | Physics |
| 30 minutes | Physics |
第二，每格半小時後，都應該有 5 分鐘的休息。
| 30 minutes | Physics |
| 5 minutes | |
| 30 minutes | Physics |
| 5 minutes | |
| 30 minutes | Physics |
| 5 minutes | |
| 30 minutes | Physics |
| 5 minutes | |
| 30 minutes | Physics |
| 5 minutes | |
| 30 minutes | Physics |
第三，在每一格半小時內，不可以做溫習以外的任何其他東西，除非事關重大，例如火警逃生。
第四，溫習以外的任何其他事情，例如 去洗手間、去廚房、接電話、執拾房間、內疚 和 傷心 等，應該堆積在那些 5 分鐘方格內，一次過完成。
第五，在每一格半小時內，不可以看時鐘或手錶。你看時間的話，即代表你已經分了心。不看時鐘手錶，又怎樣可以知道「已經夠半小時」呢？你應該用鬧鐘鬧錶的響鬧聲，作為報時信號。
— Me@2010.06.24
2010.06.25 Friday (c) All rights reserved by ACHK
Aprioricity, necessity, and analyticity
Thus, the relationship between aprioricity, necessity, and analyticity is not easy to discern. However, most philosophers at least seem to agree that while the various distinctions may overlap, the notions are clearly not identical: the a priori/a posteriori distinction is epistemological, the analytic/synthetic distinction is linguistic, and the necessary/contingent distinction is metaphysical.
— Wikipedia on A priori and a posteriori
2010.06.24 Thursday ACHK
英雄
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英雄，很多時會被他所救的人殺死。
所以，千萬不要做英雄。
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或者，做了英雄，也千萬不要給人知道。
— Me@2010.02.20
— Me@2010.06.24
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2010.06.24 Thursday
網誌時代 3
（安：為什麼有些人要把網誌文章結集成書呢？）
感覺不同。即使是閱讀同一篇文章，「看電腦螢幕」和「看書」的感覺不同。
以前，我曾經用三種不同的方法來閱讀同一篇文章。第一個是直接透過電腦螢幕閱讀。第二個是把文章打印出來，閱讀紙張。第三個是把文章下載至我的掌上電腦來閱讀。三種媒介，給我不同的感覺。雖然客觀上，是同一篇文章，但是主觀地，我每次看到（留意到）的，是文章中的不同文字。
— Me@2010.06.23
2010.06.24 Thursday (c) All rights reserved by ACHK
個人大組織 1.1
So how do you pick good programmers if you’re not a programmer? I don’t think there’s an answer. I was about to say you’d have to find a good programmer to help you hire people. But if you can’t recognize good programmers, how would you even do that?
— Paul Graham
— Me@2010.06.21
2010.06.23 Wednesday (c) All rights reserved by ACHK
鄭大世
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鄭大世（1984 年 3 月 2 日－），出生於日本的朝鮮民主主義人民共和國和大韓民國特殊雙重國籍的足球運動員，現效力於日本 J 聯賽的川崎前鋒隊，是一名前鋒。
— 維基百科
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2010.06.23 Wednesday
自動時間表
Timetable for high school study 10.3.2
這段改編自 2010 年 2 月 7 日的對話。
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| DURATION | Monday | Tuesday | Wednesday | Thursday | Friday |
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| 3 hours | Physics | A.Maths | P.Maths | Physics | A.Maths |
| 1 hour | Chinese | English | Chinese | English | Chinese |
| 1 hour | |||||
| 3 hours | P.Maths | Physics | A.Maths | P.Maths | Physics |
「不斷循環」的另一個好處是，因為各科不斷自動循環，你就不用再花額外時間，來編排時間表。沒有這個「自動時間表」的話，你每天也要花時間考慮，下一天要溫哪些科目，平均浪費半小時。
— Me@2010.06.22
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2010.06.23 Wednesday (c) All rights reserved by ACHK
Action 2
Like all nice physical theories, we can in principle derive everything about our theory of superstrings once we know the formula for the action. For bosonic strings, the action is very simple. As time passes, a string traces out a 2-dimensional surface in spacetime called the “string worldsheet”. The action is just the area of this worldsheet.
— John Baez
2010.06.22 Tuesday ACHK
Master 3
對恩人最好的報答方法是，
變成他。
— Me@2010.02.21
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2010.06.22 Tuesday
係咁咖啦 2
就是這樣的 2
（安：「係咁咖啦症候群」患者，有時不單不當地預設了「現存的東西/制度是『理所當然』的」，而且把他們所身處的規則，套用在不相干的事情上。例如，有些人會講：「足球隊領隊的薪金，不及那些明星足球員高。所以，領隊很難可以駕御到那些明星足球員。」我覺得這個想法完全不相干。
本質上，一個「管理者」的薪金，不一定要高於「被管理者」的薪金。有時，情況甚至可以倒轉，例如：有一大班球員，每一個都球技超卓。但是，加在一起作為一隊時，協調不好，導致不能致勝。所以，他們合資聘請一位教練。
重點是，不一定是要「『管理者』聘請『被管理者』」。有時，可以是「『下屬』聘請『上司』」。）
— Me@2010.06.21
2010.06.22 Tuesday (c) All rights reserved by ACHK
係咁咖啦 1.2
就是這樣的 1.2
Individuals can achieve great things, and the teacher of history ought to make this clear to his pupils. For without hope nothing of importance is accomplished.
— Bertrand Russell
— Me@2010.06.19
2010.06.21 Monday (c) All rights reserved by ACHK
Clarke’s three laws 4
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* Clarke’s Law of Revolutionary Ideas: Every revolutionary idea — in science, politics, art, or whatever — seems to evoke three stages of reaction. They may be summed up by the phrases:
(1) “It’s completely impossible — don’t waste my time”;
(2) “It’s possible, but it’s not worth doing”;
(3) “I said it was a good idea all along.”
— The Promise of Space (1968); This and similar statements attributed to Mahatma Gandhi and J. B. S. Haldane may ultimately be derived from a statement attibuted to Arthur Schopenhauer:
All truth passes through three stages.
First it is ridiculed.
Second it is violently opposed.
And third it is accepted as self-evident.
— As quoted in Seeds of Peace : A Catalogue of Quotations (1986) by Jeanne Larson, Madge Micheels-Cyrus, p. 244
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2010.06.21 Monday
馬拉松
Timetable for high school study 10.3.1
這段改編自 2010 年 2 月 7 日的對話。
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| Duration | Subject |
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| 3 hours | 理科 |
| 1 hour | 語文 |
| 1 hour | |
| 3 hours | 文科 |
我當年的高考科目是：物理、純數學 和 應用數學。三科也是「理科」，所以我溫習時，不能如我所願，一文一理。我所能做的，就是把它們不斷循環：
Physics → Pure Maths → Applied Maths → Physics → Pure Maths → …
| DURATION | Monday | Tuesday | Wednesday | Thursday | Friday |
|---|---|---|---|---|---|
| 3 hours | Physics | A. Maths | |||
| 1 hour | Language | Language | Language | Language | Language |
| 1 hour | |||||
| 3 hours | P. Maths |
| DURATION | Monday | Tuesday | Wednesday | Thursday | Friday |
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| 3 hours | Physics | A. Maths | P. Maths | ||
| 1 hour | Language | Language | Language | Language | Language |
| 1 hour | |||||
| 3 hours | P. Maths | Physics | A. Maths |
然後，語文科目也不斷循環：
中文 → 英文 → 中文 → 英文 → …
| DURATION | Monday | Tuesday | Wednesday | Thursday | Friday |
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| 3 hours | Physics | A.Maths | P.Maths | Physics | A.Maths |
| 1 hour | Chinese | English | Chinese | English | Chinese |
| 1 hour | |||||
| 3 hours | P.Maths | Physics | A.Maths | P.Maths | Physics |
「不斷循環」的好處是，你不會長時間，丟低任何一科。長時間丟低一科的話，當你要重新溫習該科時，你會很不舒服，因為很多細節，都已經忘記。
溫習任何一科，也應好像「馬拉松」一樣，有些時候應該發力，有些時候不應發力，而改為緩步跑；但是，任何情況下，你也不應該停下來。停了之後再嘗試跑的話，你會格外辛苦。
— Me@2010.06.20
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2010.06.21 Monday (c) All rights reserved by ACHK
Clarke’s three laws 3
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Arthur C. Clarke famously said, “Any sufficiently advanced technology is indistinguishable from magic.” But in my house, any sufficiently advanced technology is broken, and no one knows how to fix it.
— Stick to Drawing Comics, Monkey Brain!
— Scott Adams
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2010.06.20 Sunday
Black hole thermodynamics
Beyond black holes
Hawking and Page showed that black hole thermodynamics is more general than black holes, that cosmological event horizons also have an entropy and temperature.
More fundamentally, ‘t Hooft and Susskind used the laws of black hole thermodynamics to argue for a general Holographic Principle of nature, which asserts that consistent theories of gravity and quantum mechanics must be lower dimensional. Though not yet fully understood in general, the holographic principle is central to theories like the AdS/CFT correspondence.
— Wikipedia on Black hole thermodynamics
2010.06.19 Saturday ACHK
Job: Meaning of Life 2
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Your life would have no meaning if you just stay at home, using all the time thinking about the meaning of life.
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Every day, we face thousands of problems.
In order to survive, we have to create thousands of solutions to those thousands of problems.
Some of your solutions are not only useful for yourself,
but also useful for a lot of others.
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Why not publish them?
— Me@2010.02.22
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2010.06.19 Saturday
係咁咖啦
就是這樣的
（安：我們現在社會的運作方式，只是眾多可能方式的其中一個。而大部分人，卻想不到還有其他可能。）
不只是「想不到」，而是「不去想」。
（安：無錯。有很多人也患上了「係咁咖啦症候群」。他們不當地預設了「現存的東西/制度是『理所當然』的，所以不能改變，亦不應改變。」）
「係咁咖啦症候群」患者，不當地將「自己」和「社會/世界」分開了：「這個社會的人，控制這個社會怎樣運作。而我並不是「社會」，所以唯有接受現存的社會制度，即使自己有多麼不喜歡。」
他們忽略了，「自己」其實也是這個「社會」的一部分。
你的「社會」，就是社會中的其他人。而其他人中的每一個人的社會，其實是由他的「其他人」所組成。你是他的「其他人」。所以，你是他的「社會」的一部分。別人是你的「社會」，而你卻是別人的「社會」。
如果是「這個社會的人，控制這個社會怎樣運作」的話，那就即是「自己」也有份控制這個社會的運作制度，縱使各人控制權的大小不一。
— Me@2010.06.18
2010.06.19 Saturday (c) All rights reserved by ACHK
Images and animations
So, simplicity is key, and they purport to write such a system in a mere 20K LOC. To that end, they propose a sort of great unification theory of particles (homogeneous, extensible objects) and fields (the messages exchanged by myriad objects)—well, yes, it’s just a metaphor, but you can see it in action in the paper, applied to images and animations. The report also explains how the physical metaphor is completed with a proper simulation of the concept of time.
Reinventing programming
February 12, 2007 — jao
2010.06.18 Friday ACHK
Six Principles for Making New Things
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Here it is: I like to find (a) simple solutions (b) to overlooked problems (c) that actually need to be solved, and (d) deliver them as informally as possible, (e) starting with a very crude version 1, then (f) iterating rapidly.
If you work on overlooked problems, you’re more likely to discover new things, because you have less competition. If you deliver solutions informally, you (a) save all the effort you would have had to expend to make them look impressive, and (b) avoid the danger of fooling yourself as well as your audience. And if you release a crude version 1 then iterate, your solution can benefit from the imagination of nature, which, as Feynman pointed out, is more powerful than your own.
— Paul Graham
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2010.06.18 Friday
Physics Town 
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