# Extreme physical information

In a theory developed by B. Roy Frieden, “physical information” is defined as the loss of Fisher information that is incurred during the observation of a physical effect. Thus, if the effect has an intrinsic information level J but is observed at information level I, the physical information is defined to be the difference I − J. This defines an information Lagrangian. Frieden’s principle of extreme physical information or EPI states that extremalizing I − J by varying the system probability amplitudes gives the correct amplitudes for most or even all physical theories. The EPI principle was recently proven. It follows from a system of mathematical axioms of L. Hardy defining all known physics.

— Wikipedia on Physical information

2014.08.31 Sunday ACHK

# Prayer 5

The uses of prayers:

1. Prayer is the contemplation of the facts of life from the highest point of view. It is the soliloquy of a beholding and jubilant soul. It is the spirit of God pronouncing his works good. But prayer as a means to effect a private end is meanness and theft. It supposes dualism and not unity in nature and consciousness. As soon as the man is at one with God, he will not beg. He will then see prayer in all action. – Ralph Waldo Emerson

2. Align yourself to reality, help you to accept reality, so that you can take actions based on objective reality, rather than expected reality.

3. Slow down your conscious thoughts, so that your unconscious minds (higher-selves) can be released.

— Me@2011.07.14

# 二百萬 2.2

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 This is a file from the Wikimedia Commons.

— Me@2014.08.27

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# Integrating factor

In mathematics, an integrating factor is a function that is chosen to facilitate the solving of a given equation involving differentials. It is commonly used to solve ordinary differential equations, but is also used within multivariable calculus when multiplying through by an integrating factor allows an inexact differential to be made into an exact differential (which can then be integrated to give a scalar field). This is especially useful in thermodynamics where temperature becomes the integrating factor that makes entropy an exact differential.

— Wikipedia on Integrating factor

2014.08.26 Tuesday ACHK

# Empathy

themodelplumber 25 days ago

I used to live near the Tojimbo cliffs and have been thinking about the place (and what happens there) on and off since my first visit. I also really liked this NYT article, about a retired cop who made it his mission to stop suicide attempts at the cliffs. 222 lives had been saved as of late 2009.

scott_s 25 days ago

“Mr. Shige says his approach to stopping suicides is quite simple: when he finds a likely person, he walks up and gently begins a conversation. The person, usually a man, quickly breaks down in tears, happy to find someone to listen to his problems.”

Genuine empathy can be both powerful and shocking.

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[Unexpected] empathy is always particularly moving, especially for the hopeless. It’s a STRONG pattern interrupt to a negative view of the world around you, and really makes people question themselves.

— Hacker News

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2014.08.26 Tuesday ACHK

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— Me@2014.08.24

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# The Art of No Choice

If there are no choices, there are no alternatives.

Thus, there is no opportunity cost to consider.

So sometimes, “no choice” can induce happiness.

— Me@2011.07.11

— Me@2014.08.21

# Energy 3

energy ~ ability of causing change

energy used ~ amount of change

— Me@2014-08-19 02:44:22 AM

# 氣功

「真氣功」中的「氣」，是指「呼吸」。

— Me@2014-08-20 01:42:40 PM

— Me@2014.08.18

# Entropy (arrow of time)

Why did the universe have such low entropy in the past, resulting in the distinction between past and future and the second law of thermodynamics? Why are CP violations observed in certain weak force decays, but not elsewhere? Are CP violations somehow a product of the Second Law of Thermodynamics, or are they a separate arrow of time? Are there exceptions to the principle of causality? Is there a single possible past? Is the present moment physically distinct from the past and future or is it merely an emergent property of consciousness? Why does time have a direction?

— Wikipedia on List of unsolved problems in physics

2014.08.17 Sunday ACHK

# Amazing Gags 7

Chapter 7 Painting

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The secret source of Humor itself is not joy but sorrow.

– Mark Twain

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– Translation by Me

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2008.10.17 Friday (c) CHK2

— Me@2014.08.14

# Self-replication

Von Neumann’s crucial insight is that part of the replicator has a double use; being both an active component of the construction mechanism, and being the target of a passive copying process. This part is played by the tape of instructions in Von Neumann’s combination of universal constructor plus instruction tape.

The combination of a universal constructor and a tape of instructions would i) allow self-replication, and also ii) guarantee that the open-ended complexity growth observed in biological organisms was possible. The image below illustrates this possibility.

This insight is all the more remarkable because it preceded the discovery of the structure of the DNA molecule by Watson and Crick, though it followed the Avery-MacLeod-McCarty experiment which identified DNA as the molecular carrier of genetic information in living organisms. The DNA molecule is processed by separate mechanisms that carry out its instructions and copy the DNA for insertion for the newly constructed cell. The ability to achieve open-ended evolution lies in the fact that, just as in nature, errors (mutations) in the copying of the genetic tape can lead to viable variants of the automaton, which can then evolve via natural selection.

— Wikipedia on Von Neumann universal constructor

2014.08.11 Monday ACHK

# Deliberate practice

zvrba 1 day ago | link

I think the key is “deliberate practice” …

But before learning about ‘deliberate practice’, I had first heard a saying that “practice makes permanent”. You have to practice with the actual intention of getting better and perfecting your technique, otherwise you’re just strengthening the old habits.

Some context for the rest of the text: my hobbies are aikido and an old Japanese sword art, so I practice sword cuts a lot (wooden sword, no target — yet).

Deliberate practice is hard, it’s taxing, both physically but also mentally. It requires not only that you focus on what you’re doing but also consciously focusing on how you’re doing it. By focusing on what and how simultaneously, you can draw a causal connection between the result (what) and how you achieved it. If you’re not satisfied with the result, then you try to modify the “how” in a variety of ways until you feel the result has gotten better.

This is mentally taxing and absolutely not fun. You’re watching yourself making mistakes in real time, the mind wants but the body cannot (yet). Sometimes you even need to get a fundamentally new idea about “what” or “how” in order to break the (current) barrier. Suddenly an advice that you got from a teacher a year ago, and which didn’t make sense then, makes sense NOW.

And after having practiced for a while (usually up to 50 min; different exercises), I notice that I have reverted to “blind” practice, that I can no longer focus on “how”, regardless how much I try. That’s when I stop, regardless of how much “real time” has elapsed.

Trying to write ten thousand different sentences will make you a better writer than writing the same sentence ten thousand times.

— Hacker News

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2014.08.10 Sunday ACHK

— Me@2014.08.09

# 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