財政自由 1.2

(問:那就即是話,要在還年青時,就賺到一生夠用的金錢?

為什麼要選擇,那麼難的目標?)

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(問:但是,財政自由,又可以如何實現呢?)

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首先,要有一個概念,就是:

長遠而言,為生不可靠「售賣時間」,而要靠「創造價值」。

例如,你是一位音樂演奏家。如果你的收入,主要來自去現場演出的話,那就為之,以「售賣時間」為生。

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假設,作為音樂演奏家的你,今次的主要收入,再不是來自去現場演出,而是靠灌錄唱片來售賣的話,你就是以「創造價值」為生。那就再不只是「一分耕耘,一分收穫」了。你的收入,再不取決於,你花了多少時間演奏;而是取決於,你演奏的質素。那樣,你的收入,再不只是,靠主動去賺取,還同時有另一部分,可以被動地接收。

前者可以稱為「主動收入」;而後者則可稱為「自動收入」。

(問:依靠「售賣時間」而來的收入,就為之「主動收入」?

倚賴「創造價值」而來的收入,就即是「自動收入」?)

無錯。

(問:有自動生成收入的話,就當然十分高興。但是,那些「自動收入」,又從何而來呢?

你講的例子,我很難執行。

我又不是音樂家。即使是音樂家,大賣唱片,或者開到大型演奏會的,萬中無一。)

那並不是非黑即白。我並不是叫你,將你所有的靠「售賣時間」的收入來源,立刻刪除,百分百改為「創造價值」。

第一步應是,正職以外先加多,起碼一個收入來源;不論那一個新的賺錢方法,在開始時,賺到的有多微薄。

重點是,那方法的方向正確,長遠而言,可以令你收入中的自動部分,比重越來越多。

— Me@2019-09-10 08:33:38 PM

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2019.09.14 Saturday (c) All rights reserved by ACHK

事件實在論,更正

Event Realism | 事件實在論 6.1

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exist = can be found

無後果,就不再存在。

— Me@2013.09.25

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If the consequences of an event cannot be found anymore, that event no longer exists.

— Me@2019.09.05

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The surprising implications of the original delayed-choice experiment led Wheeler to the conclusion that “no phenomenon is a phenomenon until it is an observed phenomenon”, which is a very radical position. Wheeler famously said that the “past has no existence except as recorded in the present“, and that the Universe does not “exist, out there independent of all acts of observation”.

— Wikipedia on Wheeler’s delayed choice experiment

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「事件」並不完全「實在」。

實在 ~ 堅實地存在

仍然有後果的事件,才為之「仍然存在」。

永久地有後果的事件,才為之「實在」。

— Me@2019-09-05 09:08:41 PM

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2019.09.05 Thursday (c) All rights reserved by ACHK

A Tale of Two L’s

Lagrange’s equations are traditionally written in the form

\displaystyle{\frac{\mathrm{d}}{\mathrm{d}t} \left ( \frac {\partial L}{\partial \dot{q}} \right ) = \frac {\partial L}{\partial q}}

or, if we write a separate equation for each component of \displaystyle{q}, as

\displaystyle{\frac{\mathrm{d}}{\mathrm{d}t} \left ( \frac {\partial L}{\partial \dot{q^i}} \right ) = \frac {\partial L}{\partial q^i}}

In this way of writing Lagrange’s equations the notation does not distinguish between \displaystyle{L}, which is a real-valued function of three variables \displaystyle{(t, q, \dot q)}, and \displaystyle{L \circ \Gamma[q]}, which is a real-valued function of one real variable \displaystyle{t}.

— Structure and Interpretation of Classical Mechanics

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2019.09.04 Wednesday ACHK

Quantum observer 2

Consistent histories, 6.2 | Relational quantum mechanics, 2 | Eigenstates 2.3.2.2

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Would an observer see itself being in a superposition?

In a sense, tautologically, an observer is not a superposition of itself, because “an observer” can be defined as “a consistent history”.

an observer ~ a consistent history

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Because “state” is expressed in RQM as the correlation between two systems, there can be no meaning to “self-measurement”.

— Wikipedia on Relational quantum mechanics

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Would an observer see itself being in a superposition?

When we say that “before observation, observable B is in a superposition of some eigenstates”, you have to specify

  1. it is a superposition of what?

  2. it is a superposition with respect to what apparatuses or experimental setups?

— Me@2018-02-05 12:45 AM

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2019.09.03 Tuesday (c) All rights reserved by ACHK

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