— Me@2013.06.30

# Conscious time

Cumulative concept of time, 15

In 1895, in his novel, The Time Machine, H.G. Wells wrote, “There is no difference between time and any of the three dimensions of space except that our consciousness moves along it.”

— Wikipedia on Spacetime

Consciousness “moves” from the past to the future because consciousness is a kind of reflection.

To be conscious, one has to access its own states. But only the past states are available. Accessing one’s own now-here state is logically impossible, because that creates a metadox (paradox).

— Me@2013-06-26 02:28:51 PM

We can remember the past but not the future because the past is part of the future; the whole contains its parts, but not vice versa.

— Me@2011.08.21

# 過程成功

— Me@2013-06-27 05:47:53 PM

# Multinomial coefficient 2.1

10_C_4 =

(10!)
——–
(4!)(6!)

(10!)
——–
(＿＿)

(10!)
——–
(＿)(＿)

(10!)
——–
(4!)(＿)

(10!)
——–
(4!)(6!)

（CYW：但是，我覺得應該不止有 210 個可能性，因為抽某 4 個人出來時，本身有很多個抽法。假設「甲、乙、丙、丁」四人被抽中，去乘坐第一輛車，「先抽甲出來」和「先抽乙出來」，就已經是兩個不同的可能性。我不太明白，為什麼毋須考慮這一點？）

— Me@2013.06.29

# Fluctuation-dissipation Theorem

[The fluctuation-dissipation theorem (FDT) is a] fundamental result in statistical physics which links microscopic (thermal) fluctuations with the macroscopic property that creates a drag force on a particle in a medium.

— by Zap

— Thu May 09 2002 at 16:48:10

— Everything2

The fluctuation-dissipation theorem (FDT) is a powerful tool in statistical physics for predicting the behavior of non-equilibrium thermodynamical systems. These systems involve the irreversible dissipation of energy into heat from their reversible thermal fluctuations at thermodynamic equilibrium.

— Wikipedia on Fluctuation-dissipation Theorem

2013.06.28 Friday ACHK

# 魔間傳奇 1.3

.

I’m the last survivor of a dead culture. And I don’t really belong in the world anymore. And in some ways I feel I ought to be dead. I have certainly wished I had killed myself when I was born.

In terms of effect on the world, it’s very good that I’ve lived. And so I guess, if I could go back in time and prevent my birth, I wouldn’t do it. But I sure wish I hadn’t had so much pain.

– Richard Stallman, inventor of the Copyleft

.

.

.

2010.06.26 Saturday ACHK

# 尋找下一步 1.3

Meaningful 11.3

「憂患」即是「很多問題」。你可以透過解決，或都躍過那些問題，衍生出很多「下一步」，從而感受到人生的「意義」。你的人生道路，是一個「無限旅程」，因為有無限個「下一步」；那就為之「生路」。

~ 不斷地有下一步

~ 有用處

~ 有價值

「安樂」即是「太少問題」。在過份「安樂」的處境，你可以透過化解問題，來創造出來的「下一步」數目，非常有限。你自然會體會到人生的「空虛」。你的人生道路，是一個「有盡旅途」，又名「窮途末路」，因為只有有限個「下一步」；那就為之「死路」。

— Me@2013.06.26

# Past and Future

The past cannot be changed” is a tautology, because “cannot be changed” is included in the meaning of the word “past“.

Similarly, “the future is not fixed” is also a tautology.

Anything you cannot change is within your past.

Anything you can change is within your future.

— Me@2013-06-23 3:40 PM

— Me@2013-06-26 10:40 AM

– 李克勤 白紙鶴

1994-1997 理科學生
1997-1999 數學學生
1999-2002 工程學生
2002-2004 工程研究生

2005-2008 數學老師
2008-2010 物理學生
2010-2013 小作家
2013-

— Me@2008.09.07

— Me@2013.06.26

# 時間止血 1.6

「浪費時間」是天賦人權，不單毋須自責，而且要主動捍衞。重要的是，適可而止，不要過量；要把「浪費時間」這一隻「小魔怪」，放一個可控制的範圍以內，妥善照顧，恰當利用。

— Me@2013.06.25

# Oceanographers

In any intellectual field, one can reach greater heights by standing on the shoulders of others. But that is no longer generally allowed in the software field — you can only stand on the shoulders of the other people in your own company.

The associated psychosocial harm affects the spirit of scientific cooperation, which used to be so strong that scientists would cooperate even when their countries were at war. In this spirit, Japanese oceanographers abandoning their lab on an island in the Pacific carefully preserved their work for the invading U.S. Marines, and left a note asking them to take good care of it.

Conflict for profit has destroyed what international conflict spared. Nowadays scientists in many fields don’t publish enough in their papers to enable others to replicate the experiment. They publish only enough to let readers marvel at how much they were able to do. This is certainly true in computer science, where the source code for the programs reported on is usually secret.

— Why Software Should Be Free[1]

— Richard Stallman

[1] Free software is a matter of liberty, not price. To understand the concept, you should think of free as in free speech, not as in free beer. — Richard Stallman

2013.06.25 Tuesday ACHK

# 魔間傳奇 1.2

.

I hate this world.

I cannot accept this world.

I have to create my own world.

– Me@2009.12.02

.

.

.

2010.05.22 Saturday (c) ACHK

# 尋找下一步 1.2

Meaningful 11.2

（安：除了「時刻檢查訊息」外，人類很多其他奇怪的表現，例如「過量購物」，都可以講成，因為想「尋找下一步」。

「沉迷」就即是「不能自拔」；意思是，寧願跳進一個虛假的，有限大的因果網絡，都不願意去面對現實的，無限大的人生故事。

「無限旅程」的例子有「科學研究」、「科技發明」和「疑難排解」。

— Me@2013.06.24

# Creator

Assume that your existence is a property of X. Then in order to create you or annihilate you, X has to change the corresponding property.

For example, “having beard” is a property of me. In order to destroy that beard, I have to be willing to change my property of “having beard” to “having no beard“.

— Me@2013-06-11 2:30 AM

# Consciousness 3

Copy Me, 4

Being conscious is being able to form memories.

forming memories

~ forming an identity

~ forming a causal chain of thoughts

To form memories, one needs to access and then store its own states.

But due to metadox (paradox), no one, or no single part of the brain, can access its own now-here state directly.

That is why different parts of the brain have to communicate and coordinate in order to be conscious.

— Me@2013-05-30 1:47 PM

— Me@2013.06.23

# Eigenstates 2.3

So, after all, what is the meaning of “a quantum eigenstate”?

One way to resolve the circular definition is to define

a definite state

as

a state whose measurement result can be predicted with 100% certainty provided that the initial condition is given with 100% accuracy

Another way to resolve the circular definition is to realize that

1. a classical state, as a macroscopic definite state, is experimental or observational;

2. a quantum eigenstate, as a microscopic definite state, is conceptual.

A classical state is what we, as macroscopic observers, can see directly.

A quantum eigenstate is what we cannot see. Moreover, it is not absolute. For the same system, there are more than one choice of state vector bases, in the sense that different sets of measurements can get different sets of eigenstates.

The concept of “quantum eigenstates” exists because we insist to express quantum states in terms of daily-life (classical (macroscopic) physics) language.

— Me@2013.06.22

# 魔間傳奇

.

I Am Legend (1954)

* Sometimes he had indulged in daydreams about finding someone. More often, though, he had tried to adjust to what he sincerely believed was the inevitable — that he was actually the only one left in the world. At least in as much of the world as he could ever hope to know.

– Richard Matheson

.

.

.

2010.05.21 Friday ACHK

# 尋找下一步 1.1

Meaningful 11.1

I get mail; therefore I am.

— Me@2013.06.21

# Virtual particle

The Matrix, 4

However, the longer a virtual particle exists, the more closely it adheres to the mass-shell relation. A “virtual” particle that exists for an arbitrarily long time is simply an ordinary particle.

However, all particles have a finite lifetime, as they are created and eventually destroyed by some processes. As such, there is no absolute distinction between “real” and “virtual” particles. In practice, the lifetime of “ordinary” particles is far longer than the lifetime of the virtual particles that contribute to processes in particle physics, and as such the distinction is useful to make.

— Wikipedia on Virtual particle

The difference between the real world and a virtual world is that reality lasts longer.

— Me@2013.06.20