# Life, 3

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We exist in time because time is change.

Growing is part of the definition of life. Growing is a kind of change.

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Also, without time/change, there would be no thinking and no thoughts.

— Me@2017-12-26 11:42 am

— Me@2018-05-23 10:05:03 PM

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time ~ change

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Time is logically necessary if change is necessary.

— Me@2018-02-04 09:07:48 PM

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# The language of Change 1.2

Energy conservation, 6.2 | Energy 5.2

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time ~ change

energy ~ the ability of _keeping_ changing

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constant velocity ~ the amount of an object’s change of position, measured with respect to its observer’s unit of change, is constant

$s = \Delta x$

$v = \frac{s}{\Delta t} = \frac{\Delta x}{\Delta t}$

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kinetic energy ~ the amount of the ability of keeping changing an object’s position

$\frac{1}{2} m v^2$ ~ the square of (the amount of change of position, relative to the observer’s unit of change)

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Energy difference is _not_ exactly a measurement of the amount of change, time interval is.

— Me@2018-02-20 09:39:30 AM

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# The language of Change

Energy conservation, 6 | Energy 5

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time ~ change

energy ~ the ability of causing change

Assuming

1. a system of one single particle

2. has only kinetic energy

3. and that kinetic energy is conserved.

conservation of energy ~ an object’s potential amount of change of position, measured with respect to its observer’s unit of change, is constant

$s = \Delta x$

$v = \frac{s}{\Delta t} = \frac{\Delta x}{\Delta t}$

— Me@2018-02-15 02:21:20 PM

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Note:

The above argument has a bug:

If the mass m is constant, the kinetic energy $E_K$ should be proportional to velocity squared $v^2$, instead of velocity $v$.

$E_K = \frac{1}{2} m v^2$

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However, the above argument is still technically correct:

When $E_K$ is constant, $v^2$ is constant. In turn, the magnitude of $v$ also remains unchanged.

— Me@2018-02-19 09:37:24 PM

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# Definition of Time, Prime

Energy 4

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time ~ change

energy ~ the ability of causing change

— Me@2018-02-15 10:20:25 AM

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# 生命

「生命」這個詞語很有意思。

「生」，就是指一些可改變的東西，例如，「生活」、「生氣」和「生機」等。「命」，就是指一些不可改變的東西，例如，「命運」、「命定」和「命令」等。

— Me@2015.03.20

# Energy 3

energy ~ ability of causing change

energy used ~ amount of change

— Me@2014-08-19 02:44:22 AM

# Change

By the definition of “time”, anything in time must be changing. Anything not in time, such as the dead, cannot change.

If you do not keep changing for better (improve, grow), you are effectively dead.

— Me@2011.10.10

Although this paragraph is not 100% accurate, its spirit is useful.

— Me@2014.08.09

# Energy 2

energy ~ change

time ~ change

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If you do not change, you cannot stay in time anymore.

So the key to keep the existence of yourself is to keep changing yourself.

— Me@2014-03-27 3:34 PM

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# Energy

Energy is the ability of causing change.

Change is related to time.

That’s why energy is related to time.

— Me@2012-10-22 01:45:17 PM

Application of Noether’s theorem allows physicists to gain powerful insights into any general theory in physics, by just analyzing the various transformations that would make the form of the laws involved invariant. For example:

• the invariance of physical systems with respect to spatial translation (in other words, that the laws of physics do not vary with locations in space) gives the law of conservation of linear momentum;
• invariance with respect to time translation gives the well-known law of conservation of energy

— Wikipedia on Noether’s theorem

# 時、間、時間, 2

Time is a dimension in which events can be ordered from the past through the present into the future, and also the measure of durations of events and the intervals between them.

— Wikipedia on Time

— Me@2011.09.09

— Me@2013.06.10

# 數量

Number, Time, Money, 1.2

「量」的統一標準為之「數」。

— Me@2011.09.09

# 變通

Easy 3

Easy” in Chinese is “容易”, literally meaning “able to change“.

— Me@2012-11-29 10:47:38 AM

It is not the strongest of the species that survives, nor the most intelligent, but rather the one most adaptable to change.

— Charles Darwin misquotation

The definition of insanity is doing the same thing over and over and expecting different results.

— Albert Einstein misquotation

If you are willing to change based on the feedback from the reality, many difficult things will become easy.

— Me@2012.12.17

— 系辭下

— 易經

# Easy 2

Easy” in Chinese is “容易”, literally meaning “able to change“.

— Me@2012-11-29 10:47:38 AM

# Rich Hickey, 2

Like Clojure, Datomic incorporates an explicit model of time. All data is associated with a time and new data does not replace old data, but is added to it. Returning to our previous example, if John later changes his address, a new datom would be added to the database, e.g.

John, :street, “17 Maple St.”, T43

This mirrors the real world where the fact that John has moved does not erase the fact that John once lived on Swift St. This has multiple benefits: the ability to view the database at a point in time other than the present; no data is lost; the immutability of each datom allows for easy and pervasive caching.

— rjn945 15 days ago

— Hacker News

2012.03.21 Wednesday ACHK

# Change

change = delete the old one + create a new one

— Me@2010.11.28

# Number, Time, Money, 2.7

Ideal clock 3.7 | 時間定義 13.7

— Me@2011.09.16

# Number, Time, Money, 2.6

Ideal clock 3.6 | 時間定義 13.6

（安：第二個大問題是，你剛才講過，沒有一套數字標籤系統（時間讀數）的話，有多於兩件事時，無論是

1. 要建構事件序列；

2. 要在原本的事件序列中，加插額外的另一件事；還是

3. 要把兩個事件序列，組合成一個序列，

「十分明顯」的例子有：「甲 = 入大學；乙 = 大學畢業」。因為「入大學」是「大學畢業」的先決條件，所以「入大學」一定先於「大學畢業」發生。

「不十分明顯」的例子有：「甲 = 電燈面世；乙 = 電話面世」。

「十分不明顯」的例子有：「甲 = 地球形成；乙 = 火星形成」。

— Me@2011.09.14