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在某些老師面前, 我覺得自己是天才;
在某些老師面前, 我覺得自己是垃圾.
在某些朋友面前, 我覺得自己是天才;
在某些朋友面前, 我覺得自己是垃圾.
在某些學生面前, 我覺得自己是天才;
在某些學生面前, 我覺得自己是垃圾.
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選擇老師,
選擇朋友,
選擇學生.
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– Me
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2008.08.23 Saturday Morning (c) CHK2
Monthly Archives: June 2012
Civilization V
Sid Meier’s Civilization V (also known as Civilization 5 or Civ 5) is a turn-based strategy, 4X computer game developed by Firaxis, released on Microsoft Windows in September 2010 and on Mac OS X on November 23, 2010. It is the latest game in the Civilization series.
In Civilization V, the player leads a civilization from prehistoric times into the future on a procedurally-generated map, achieving one of a number of different victory conditions through research, diplomacy, expansion, economic development, government and military conquest.
— Wikipedia on Civilization V
2012.06.19 Tuesday ACHK
Gamification
The Problem with Gamification is that it tries to solve a problem that doesn’t exist. We already have a universal points system, across all aspects of life, that represents status and is redeemable for real world prizes. It’s called “money.”
— Greg Costikyan
2012.06.19 Tuesday ACHK
反不相關推薦 1.4
這段改編自 2010 年 6 月 2 日的對話。
記住，正如剛剛所講，「自我中心」通常都有害。大部分情況下，你都應該「以目標為中心」，而不是企圖作「才藝表演」。例如，考試時，你應該「以分數為中心」。求職面試時，你則應該「以工作為中心」。那樣的話，試想想，你在求職自我介紹時，你第一句說話，或者第一個需要帶出的訊息，應該是什麼？
第一個訊息應該是，你可以怎樣為公司賺錢？
第二個訊息應該是，在「為公司賺錢」這一方面，你有什麼過人之處？為什麼要聘請的應該是你，而不是你的競爭者？
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| This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license. Author: Zach Vega |
比喻說，假設現在是 2007 年，大部分世人也不知道什麼是「智能手機」。而你則是一位「智能手機」銷售員。你需要說服潛在顧客，由原本購買一般的手提電話，改為購買你公司的「智能手機」。如果依照一般人錯誤的自我介紹方法，你會這樣說：
「這部機器是黑色的。它大概是一個長方體。它有堅硬的外殼。它會發光 ……」
留意，你所講的，一句也沒有錯，全部也符合實情。唯一的問題是，聽過你的介紹後，大概沒有人，會有動機去購買「智能手機」，因為，他們根本仍然不知道，「智能手機」究竟是什麼。聽眾最多只會覺得，你是在講一個謎語，而不是在推介什麼先進的產品。
一般人的自我介紹方法，何嘗不是一個「謎語」？
「我在某某中學畢業，讀過什麼科目，參加過什麼課外活動。我有什麼興趣。我有什麼優點。我有什麼缺點。我讀某某大學，主修什麼科目，參加過什麼學會。我有某某教授的推薦信 ……」
即使你所講的，一句也沒有錯，全部都符合實情，也沒有什麼大用。潛在僱主的心中反應將會是：「那又怎樣？你究竟想帶出什麼？為什麼我要聘請你？」
如果是推介「智能手機」，你第一個要帶出的訊息就應該是：「智能手機」的主要功用是什麼？「智能手機」比起一般的手提電話，有什麼額外功能？為什麼我需要購買一部「智能手機」，而不是一般的手提電話？
而第二個訊息則應該是：如果我要買「智能手機」，有很多牌子可以選擇，為什麼我要跟你買？你公司的「智能手機」，比起其他智能手機，有什麼過人之處？
— Me@2012.06.19
2012.06.19 Tuesday (c) All rights reserved by ACHK
The Dragon Book
Compilers: Principles, Techniques, and Tools is a famous computer science textbook by Alfred V. Aho, Monica S. Lam, Ravi Sethi, and Jeffrey D. Ullman about compiler construction. Although more than two decades have passed since the publication of the first edition, it is widely regarded as the classic definitive compiler technology text.
It is affectionately known as the Dragon Book to a generation of computer scientists as its cover depicts a knight and a dragon in battle, a metaphor for conquering complexity. This name can also refer to Aho and Ullman’s older Principles of Compiler Design.
— Wikipedia on Compilers: Principles, Techniques, and Tools
2012.06.18 Monday ACHK
Control
But the fact is, we’re not in control; principles are.
We can control our choices, but we cannot control the consequences of those choices.
— First Things First, p.25
— by Stephen R. Covey
2012.06.18 Monday ACHK
觀我者誰 2
這段改編自 2010 年 3 月 20 日的對話。
（安：我發覺，在不同人的面前，我自己會有不同的「自我」出現。或者說，我是由眾多不同的「自我」所組成的一個「委員會」。在不同人的面前，「委員會」會由不同的「自我」做主席。）
無錯。例如，在有禮貌的人面前，我有禮貌的「自我」就會出現。在沒有禮貌的人面前，我沒有禮貌的「自我」，就會主導我的整體思想言行。
這就是「近朱者赤、近墨者黑」的原因之一。所以，選擇朋友要極端小心。必要時，寧願沒有朋友，也不要結識壞朋友。
— Me@2012.06.18
2012.06.18 Monday (c) All rights reserved by ACHK
Mass in Relativity, 2
Defining mass in general relativity: concepts and obstacles
Generalizing this definition to general relativity, however, is problematic; in fact, it turns out to be impossible to find a general definition for a system’s total mass (or energy). The main reason for this is that “gravitational field energy” is not a part of the energy-momentum tensor; instead, what might be identified as the contribution of the gravitational field to a total energy is part of the Einstein tensor on the other side of Einstein’s equation (and, as such, a consequence of these equations’ non-linearity).
While in certain situation it is possible to rewrite the equations so that part of the “gravitational energy” now stands alongside the other source terms in the form of the Stress-energy-momentum pseudotensor, this separation is not true for all observers, and there is no general definition for obtaining it.
— Wikipedia on Mass in general relativity
2012.06.17 Sunday ACHK
反不相關推薦 1.3
這段改編自 2010 年 6 月 2 日的對話。
例如，甲想應徵做電腦程式編寫員，我就會特別讚許他 品學兼優、領導才能卓越、數學頭腦上乘、體壇明日之星 和 文筆扣人心弦 等等。但是，同電腦有關的，就至多輕輕帶過。
結果，甲給我害了自己也不知道，給我誤了一生也不察覺，而且還要以為我的「推薦信」寫得很好。留意，有很多人在不知不覺間，都是用了同一類的方法來害自己。你一定要好好避免。
有很多人在寫求職信，或者在面試中自我介紹時，都是只是企圖把自己的優點列舉出來。但他們卻不知道，那並不是重點。即使你的優點多如繁星，如果你的潛在僱主，聽來聽去也聽不到，你的優點和那份工作，有什麼明顯直接關係的話，他就始終都不會聘請你。
大部分人都會犯這個錯誤。其終極核心原因是「自我中心」。他們只顧自己想講什麼，只顧表現自己，而卻沒有顧及，潛在僱主想聽什麼，他最關心的是什麼。
記住，正如剛剛所講，「自我中心」通常都有害。大部分情況下，你都應該「以目標為中心」，而不是企圖作「才藝表演」。例如，考試時，你應該「以分數為中心」。求職面試時，你則應該「以工作為中心」。那樣的話，試想想，你在求職自我介紹時，你第一句說話，或者第一個需要帶出的訊息，應該是什麼？
— Me@2012.06.17
2012.06.17 Sunday (c) All rights reserved by ACHK
Mass in Relativity
Concisely, the mass of a system in special relativity is the norm of its energy-momentum four vector.
Note that mass is computed as the length of the energy-momentum four vector, which can be thought of as the energy and momentum of the system “at infinity”.
Note that in General Relativity, gravity is caused not by mass, but by the stress-energy tensor. Thus, saying that a moving particle has “more gravity” does not imply that the particle has “more mass”. It only implies that the moving particle has “more energy”.
Because General Relativity is a diffeomorphism invariant theory, it has an infinite continuous group of symmetries rather than a finite-parameter group of symmetries, and hence has the wrong group structure to guarantee a conserved energy.
Noether’s theorem has been extremely influential in inspiring and unifying various ideas of mass, system energy, and system momentum in General Relativity.
— Wikipedia on Mass in general relativity
2012.06.16 Saturday ACHK
軟硬智力 8
One’s intelligent hardware cannot be changed, almost.
What I can do to provide the best intelligent software for one’s existing intelligent hardware.
— Me@2011.10.18
2012.06.16 Saturday (c) All rights reserved by ACHK
觀我者誰 1.3
這段改編自 2010 年 3 月 20 日的對話。
例如，「現在的我」和「過去的我」性格不大相同，可以視為不同的「自我」。有時，「現在的我」閱讀「過去的我」的文章時，感覺有如正在閱讀另一個人的文章一樣。那就是「多重自我」的一個顯現。
「感覺有如另一個人」的其中一個情況是，有時，我閱讀自己所寫的文章時，發覺竟然會學到一些新的東西。那就明顯地暗示了，寫文章時候的我，和閱讀該篇文章時候的我，並不完全是「同一個」「自我」。
— Me@2012.06.16
2012.06.16 Saturday (c) All rights reserved by ACHK
Loki Software
Loki Software, Inc. (sometimes also called Loki Games or Loki Entertainment Software) was a software firm based in Tustin, California, United States, that ported several video games from Microsoft Windows to Linux. It took its name from the Norse deity Loki.
Legacy
Loki Software, although a commercial failure, is credited with the birth of the modern Linux game industry. Loki developed several free software tools, such as the Loki installer (also known as Loki Setup), and supported the development of the Simple DirectMedia Layer. They also started the OpenAL audio library project (now being run by Creative Technology and Apple Inc.) and with id Software wrote GtkRadiant. These are still often credited as being the cornerstones of Linux game development. They also worked on and extended several already developed tools, such as GCC and GDB.
The book Programming Linux Games by Loki Software and John R. Hall is recognized as one of the prominent tutorials for the Simple DirectMedia Layer. Many of Loki’s free tools are still actively used and being developed, often by former employees of the company, many of them having moved to other computer game or Linux companies.
— Wikipedia on Loki Software
2012.06.15 Friday ACHK
In Praise of Idleness, 2
One of the commonest things to do with savings is to lend them to some Government. In view of the fact that the bulk of the public expenditure of most civilized Governments consists in payment for past wars or preparation for future wars, the man who lends his money to a Government is in the same position as the bad men in Shakespeare who hire murderers. The net result of the man’s economical habits is to increase the armed forces of the State to which he lends his savings. Obviously it would be better if he spent the money, …
— In Praise of Idleness
— Bertrand Russell
2012.06.15 Friday ACHK
反不相關推薦 1.2
閱讀理解 1.4.2
這段改編自 2010 年 6 月 2 日的對話。
我中學時的一位英文老師，講過他大學時有一位教授，曾經教過他一道絕招，如何透過寫「推薦信」來害人。
我現在把它講出來，並不是叫你去害人，而是教你避免被人害。更加重要的是，你要避免自己害自己。大部人是的情況是，自己害了自己也不知道，誤了自己一生也不察覺，而且還要以為自己做得很好。
假設一個學生叫我為他寫推薦信。如果我不想寫，我會直接告訴他我不想寫。那是最合理的做法。
再假設我是邪惡的。如果我希望害那個學生（甲），我則會為他寫。而在那封信中，我會特別讚許他，描述到他是「前無古人，後無來者」的好。但是，和他所應徵的工作直接有關的，就偏偏隻字不提。
例如，甲想應徵做電腦程式編寫員，我就會特別讚許他 品學兼優、領導才能卓越、數學頭腦上乘、體壇明日之星 和 文筆扣人心弦 等等。但是，同電腦有關的，就至多輕輕帶過。
結果，甲給我害了自己也不知道，給我誤了一生也不察覺，而且還要以為我的「推薦信」寫得很好。
— Me@2012.06.15
2012.06.15 Friday (c) All rights reserved by ACHK
Relativity
The theory appeared to me then, and it still does, the greatest feat of human thinking about nature, the most amazing combination of philosophical penetration, physical intuition, and mathematical skill… It appealed to me like a great work of art …
— Max Born
2012.06.14 Thursday ACHK
The why of love, 2.1.3
軟硬智力 7.1.3
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How to answer this kind of questions:
Why am I so stupid?
It is not a valid question. It is not the case that there is a pre-existing “I”, to which we can assign some qualities such as stupidity. Instead, I am the sum of all my qualities, including the quality of being stupid.
— Me@2011.10.18
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This kind of questions are like
Why does a triangle have three angles?
To be not stupid, the correct approach should be,
I am stupid. So I have to change my ‘I’ in order to be not stupid.
Although you cannot change the number of angles of a triangle, you can change the figure itself, replacing it with a rectangle.
— Me@2011.10.18
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2012.06.14 Thursday (c) All rights reserved by ACHK
觀我者誰 1.2
這段改編自 2010 年 3 月 20 日的對話。
寫作，是觀察「多重自我」的一個極佳方法。
一方面，「文章」就是凝固了的思想。自我凝固了，自然較為容易觀察研究。
另一方面，寫文章的結構是，由 不同性格、不同層次 和 不同時間 的自我，合作做同一件事。他們互相爭論，大打出手，直到最終達成共識，才能化成文字。寫文章是「多重自我」的行動中，最為複雜的其中一種。
所以，透過觀察自己寫作的過程和成果，你就可以較為了解自己的「多重自我」。
例如，「現在的我」和「過去的我」性格不大相同，可以視為不同的「自我」。有時，「現在的我」閱讀「過去的我」的文章時，感覺有如正在閱讀另一個人的文章一樣。那就是「多重自我」的一個顯現。
— Me@2012.06.14
2012.06.14 Thursday (c) All rights reserved by ACHK
The Time Ships
The Time Ships is a 1995 science fiction novel by Stephen Baxter. A sequel to The Time Machine by H. G. Wells, it was officially authorized by the Wells estate to mark the centenary of the original’s publication. It won the John W. Campbell Memorial Award and the Philip K. Dick Award in 1996, as well as the British Science Fiction Association Award in 1995. It was also nominated for the Hugo, Clarke, and Locus Awards in 1996.
— Wikipedia on The Time Ships
2012.06.13 Wednesday ACHK
Real
Real
= long term
= continuous
= objective in time
— Me@2012.06.11
2012.06.13 Wednesday (c) All rights reserved by ACHK
Physics Town 
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