The Time Machine

This is the place.

So it is.

_But there’s nothing here.

Well, it was different then. My laboratory was all around here. The kitchen was up there where that tree is. Not that Mrs. Watchit ever let me go in there.

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I don’t know what to tell you, sir. He’s been gone this whole week.

_And you’ve no idea where he went?

No, sir.

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_[Alexander] This would be my greenhouse. There was a garden outside.

Gren’tormar’tas?

Yes.

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I’m glad.

_Sir?

I’m glad he’s gone.

Maybe he’s finally found some place where he can be happy.

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This was my home.

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His home.

— The Time Machine (2002 film)

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2019.09.01 Sunday ACHK

Ken Chan 時光機 2.1

那時,Ken Chan 有一項特點,令我覺得奇怪。

他有極多的職位。當時,我不明白,他哪有那麼多的時間。

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1.1 除了是物理補習天王外,

2.1 他宣稱有在大學教書。是教授、講師,還是其他,我就不知道。我忘記了,他有沒有講過。

2.2 他在大學做研究。據我理解,他當時研究的是有關激光的實驗物理。

有一次,我打電話給他問題目。他說他正在做實驗,需要先行關掉,用來做實驗的機器。

2.3 他有時要往大陸作學術演講。

3.1 然後,他亦是某某什麼工程學會的主席。

名銜太多,不能盡錄。

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雖然,那是九十年代,但是,他十年後的廣告,大概可作參考。

畢業於香港大學工程學系,並擁有多個學位、專業資格及榮銜,包括: 香港大學太古學者、英國皇家物理學會、香港工程師學會、電機電子工程師學會、中國機械工程師學會……等等。

廣告中的那些學會,不知是哪個意思。例如,他是電機電子工程師學會的什麼?

只是會員?還是管理層?

— Me@2019-08-30 09:31:52 PM

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2019.09.01 Sunday (c) All rights reserved by ACHK

Physical laws are low-energy approximations to reality, 1.3.1

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Symmetry breaking is important.

When there is symmetry-breaking, the system goes to a low-energy state.

Each possible low-energy state can be regarded as a new “physical world”.

One “physical world” cannot jump to another, unless through quantum tunnelling. But the probability of quantum tunnelling happening is low.

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Low-energy physics theories, such as harmonic oscillator, are often simple and beautiful.

— Professor Renbao Liu

— Me@2019-04-08 10:46:32 PM

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2019.04.09 Tuesday (c) All rights reserved by ACHK

Physical laws are low-energy approximations to reality, 1.2

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When the temperature \displaystyle{T} is higher than the critical temperature \displaystyle{T_c}, point \displaystyle{O} is a local minimum. So when a particle is trapped at \displaystyle{O}, it is in static equilibrium.

However, when the temperature is lowered, the system changes to the lowest curve in the figure shown. As we can see, at the new state, the location \displaystyle{O} is no longer a minimum. Instead, it is a maximum.

So the particle is not in static equilibrium. Instead, it is in unstable equilibrium. In other words, even if the particle is displaced just a little bit, no matter how little, it falls to a state with a lower energy.

This process can be called symmetry-breaking.

This mechanical example is an analogy for illustrating the concepts of symmetry-breaking and phase transition.

— Me@2019-03-02 04:25:23 PM

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2019.03.02 Saturday (c) All rights reserved by ACHK

知識論

(導師:李天命)

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d_2019_02_19__22_28_27_PM_

後設哲學

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Aside(題外話):

李天命先生推薦書籍:

《四大聖哲:蘇格拉底、佛陀、孔子、耶穌》

作者:雅士培 Karl Jaspers

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希伯來

宗教

耶穌

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希臘

理性

蘇格拉底

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邏輯/思考方法[大部分研究哲學人士,也不懂邏輯,不懂思考方法。]

庸顱戴光環

哲學無哲技

[科學有科技,哲學無哲技]

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知識論 —— 思

形上學 —— 死

倫理學 —— 生

— Me@2002-01-10

— Me@2019-02-20

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2019.02.20 Wednesday (c) All rights reserved by ACHK

Pandemonium

E: Can you just, you know, like, just tell me the answer?

J: Sorry?

E: You know, the answer. To everything.

What’s the point of love if it’s just disappear?

There has to be meaning to existence, otherwise the universe is made of pain and I don’t like the thought of that.

So, tell me the answer!

J: The more human I become, the less things make sense.

But that’s part of the fun. Right?

E: What do you mean?

J: If there were an answer I can give you to, how the universe works, it wouldn’t be special. It would be just a machinery fulfilling its cosmic design. It would be just a big, dumb food processor.

But, since nothing seems to make sense, when you find something or someone that does, it’s euphoria.

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In all of this randomness, in this pandemonium, you and Chidi found each other and you had a life together.

Isn’t that remarkable?

E: Pandemonium is from Paradise Lost. Milton called the center of hell “pandemonium”, meaning “place of all demons”.

I guess all I can do is to embrace the Pandemonium.

Find happiness in the unique insanity of being here, now.

— The Good Place

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2019.01.27 Sunday ACHK

(反對)開夜車 2.1

Ken Chan 時光機 1.4.2.1

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之前提到,Ken Chan 所讀的中學不正常:

在中四和中五的校內考試測驗中,不斷地考核高考課程。所以,他在中四時代開始,已經要鑽研,高考程度和大學程度的物理。

那樣,他何來有,那麼多的時間呢?

那時,他往往要讀書,至通宵達旦。

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那樣,他的公開試成績,又如何呢?

根據他所講,他事後發現,會考物理科中的 MC(多項選擇題)部分,錯了兩題;他達不到他原本,「全部科目全部滿分」的理想。

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那樣,他又做不做到「狀元」,全部科目「奪 A」呢?

他在另一天的課堂中,暗示自己當年,差一點才做到「狀元」:

(我暫時不記得,他以下說話的上半句是什麼。)

… 如何不是那樣,我就毋須於,放榜當天的晚上,在家裡哭。唉!還是不說了。

當時,我想知道詳情。可惜,他真的沒有說下去,我也沒有辦法。

雖然,主觀而言,從他自己的角度,成績不是理想,因為,那不是「全部科目全部滿分」;但是,如果不是對自己,那麼苛刻的話,客觀來說,他的成績是上乘的。

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可能,因為他「溫習到凌晨」式的方法,對他來說有效,他亦鼓勵學生那樣做。

我現在的記憶,暫時未能確定,他在課堂中,有沒有明示推介過,用這個方法。但是,我記得在他派發的筆記中,其中一頁,有一個正在深夜讀書的漫畫。而在漫畫下面,有一句「study to 3 a.m.」(讀書至深夜三點鐘)。

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長話短說,我是反對這個方法的,…

— Me@2019-01-18 03:47:50 PM

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2019.01.19 Saturday (c) All rights reserved by ACHK

接觸永恆 2

Publish! 11

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每個人,都需要有作品。

你的作品,就是你的人生意義。

每個人,都依靠自己的作品來生存。

作品,就是一些,不會隨自己的消失而消失的東西。

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你,有沒有自己的作品?

— Me@2011.07.03

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2019.01.13 Sunday (c) All rights reserved by ACHK

Ken Chan 時光機 2.2

聖誕假後的常規課程中,Ken Chan 預計應該不會有時間,教光學和熱學。但是,他認為那兩個課題很淺易,所以,期望我們即使自修,也沒什麼難度。

但是,他後來改變主意,還是決定於,農歷新年的年初一、二、三,為我們補課,教回光學和熱學。

今次,那三天的課,他不單不收我們的學費,他還要自己,花時間找課室、花金錢付租金。

後來,他改為每天收 20 元,即是總共 60 元。他解釋道,補課社的職員因為他的補課,要犧牲那三天的農曆新年假期。那每人 60 元的學費是,全數慰勞他們的。

那三天的補課,好處是光學和熱學;壞處是,由於每天也補多個小時,我少了大量,各科的溫習時間。但是,那個農曆新年長假,因為我自己時間管理不善,而損失的時間,遠多於那三天的補課時間。

感謝 Ken Chan 的額外付出。我亦慶幸,生於那個時空,還是有真人授課的年代。出生遲十年,就已經只能透過錄影帶,來獲得 Ken Chan 的教導。

— Me@2019-01-06 02:18:47 PM

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2019.01.06 Sunday (c) All rights reserved by ACHK

Ken Chan 時光機 2.1

當年是 1996 年,我 9 月開始上他的課程。每星期上 1.5 小時,由星期六早上 8 時半,上到 10 時正。所以,每個星期六,我也要在還未睡夠時,就很早起床。去補習社的路程中,往往是一邊行,一邊流鼻水;唯有勉勵自己:「即使再辛苦,只要捱過『會考』(公開試),就可以有好日子過。」

記憶所及,大概在聖誕前,剛好完成了力學分部。

然後,他於聖誕假期中,有額外補課—歷時三天的全日課程,不再是每天 1.5 小時。就在那三天,他要完成波動分部。

他在公佈有這個聖誕波動補課時,我有兩點不開心。

第一點是,我要交額外的學費。不過,相對於第二點而言,那也只是小問題。

第二點是,那補課的學額有限,只有常規課程的兩成。我現在的記憶可能有誤,未必真的是兩成,但也必定是,遠少於他常規課程的學生數目。換句話說,如果供不應求,我就可能報讀不到。幸好,正正是因為這個擔憂,我及早報名,爭取到一個補課學位。

— Me@2018-12-27 03:50:13 PM

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2018.12.27 Thursday (c) All rights reserved by ACHK

A pretty girl, 2

Women are directly fitted for acting as the nurses and teachers of our early childhood by the fact that they are themselves childish, frivolous and short-sighted; in a word, they are big children all their life long–a kind of intermediate stage between the child and the full-grown man, who is man in the strict sense of the word. See how a girl will fondle a child for days together, dance with it and sing to it; and then think what a man, with the best will in the world, could do if he were put in her place.

— Of Women

— Arthur Schopenhauer

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When the elderly Schopenhauer sat for a sculpture portrait by the Prussian sculptor Elisabet Ney in 1859, he was much impressed by the young woman’s wit and independence, as well as by her skill as a visual artist. After his time with Ney, he told Richard Wagner’s friend Malwida von Meysenbug, “I have not yet spoken my last word about women. I believe that if a woman succeeds in withdrawing from the mass, or rather raising herself above the mass, she grows ceaselessly and more than a man.

— Wikipedia on Arthur Schopenhauer

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Anybody can look at a pretty girl and see a pretty girl. An artist can look at a pretty girl and see the old woman she will become. A better artist can look at an old woman and see the pretty girl that she used to be. But a great artist — a master — and that is what Auguste Rodin was — can look at an old woman, portray her exactly as she is… and force the viewer to see the pretty girl she used to be…. and more than that, he can make anyone with the sensitivity of an armadillo, or even you, see that this lovely young girl is still alive, not old and ugly at all, but simply prisoned inside her ruined body. He can make you feel the quiet, endless tragedy that there was never a girl born who ever grew older than eighteen in her heart…. no matter what the merciless hours have done to her. Look at her, Ben. Growing old doesn’t matter to you and me; we were never meant to be admired — but it does to them. Look at her! (UC)

— Robert A. Heinlein

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2018.10.27 Saturday ACHK