Like many software developers, my introduction to programming was my Dad telling me if I wanted to play video games at home, I had to write them first. Tough love hurts. Home game consoles were the gateway drug of choice for parents who imagined their children as young programmers, a sneaky way for parents to trick their lazy game-playing kids into learning BASIC.
— Rediscovering Arcade Nostalgia
— Jeff Atwood
2012.05.08 Tuesday ACHK
Food provides nutrients from six broad classes: proteins, fats, carbohydrates, vitamins, dietary minerals, and water. Carbohydrates are metabolized to provide energy. Proteins provide amino acids, which are required for cell construction, especially for the construction of muscle cells. Essential fatty acids are required for brain and cell membrane construction. Vitamins and trace minerals helps to keep good electrolyte balance and are used for metabolic processes. Dietary fiber also affects one’s health, although it’s not digested into the body.
— Wikipedia on Dieting
2012.05.07 Monday ACHK
Guard well your spare moments. They are like uncut diamonds. Discard them and their value will never be known. Improve them and they will become the brightest gems in a useful life.
— Ralph Waldo Emerson
2012.05.07 Monday ACHK
Particle physics phenomenology is the part of theoretical particle physics that deals with the application of theory to high-energy particle physics experiments. Within the Standard Model, phenomenology is the calculating of detailed predictions for experiments, usually at high precision (e.g., including radiative corrections). Beyond the Standard Model, phenomenology addresses the experimental consequences of new models: how their new particles could be searched for, how the model parameters could be measured, and how the model could be distinguished from other, competing models. Phenomenology may in some sense be regarded as forming a bridge between the rarefied, highly mathematical world of theoretical physics proper (such as quantum field theories and theories of the structure of space-time) and experimental particle physics.
— Wikipedia on Phenomenology (particle physics)
2012.05.06 Sunday ACHK
時間態 4
Death is a decoherence of the mind.
Mind is an explicit (coherent) superposition of eigenstates.
After death, it still exists in the environment.
— Me@2012-04-15 11:36:41 PM
2012.05.06 Sunday (c) All rights reserved by ACHK
Consciousness
Infinite regress in consciousness is the formation of an infinite series of “inner observers” as we ask the question of who is observing the output of the neural correlates of consciousness in the study of subjective consciousness.
— Wikipedia on Infinite regress
2012.05.05 Saturday ACHK
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Emerson wrote in his speech “The American Scholar”: “We will walk on our own feet; we will work with our own hands; Divine Soul which also inspires all men.” Emerson closed the essay by calling for a revolution in human consciousness to emerge from the new idealist philosophy:
So shall we come to look at the world with new eyes. It shall answer the endless inquiry of the intellect, — What is truth? and of the affections, — What is good? by yielding itself passive to the educated Will. … Build, therefore, your own world. As fast as you conform your life to the pure idea in your mind, that will unfold its great proportions. A correspondent revolution in things will attend the influx of the spirit.
– Wikipedia on Transcendentalism
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2010.09.07 Tuesday ACHK
人格堤壩 6
這段改編自 2010 年 3 月 20 日的對話。
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沒有必要的話，就不要和，不誠實的人相處。你是沒有辦法，和不誠實的人建立「默契」的。
簡單而言，「默契」建基於「信任」。沒有「信任」，就沒有可能有「默契」。
複雜而言，說謊的人（甲）會發放假訊息，導致你腦海中「虛擬的甲」，永遠和「真實的甲」有天壤之別。那樣，從你的角度看，甲是不可預測的。換句話說，無論相處多久，你和甲也沒有可能有「默契」。
你可以有辦法，分辨到「誠實人士」和「說謊人士」。但是，你是沒有辦法，分辨到「間中說謊人士」和「時常說謊人士」，除非你句句鑑證。換而言之，你永遠不會知道，「表面的甲」和「真正的甲」相差有多大。當你以為甲只是想「謀財」時，他的真正目的，可能是想「害命」。
— Me@2012.05.05
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2012.05.05 Saturday (c) All rights reserved by ACHK
In quantum mechanics and quantum field theory, the vacuum is defined as the state (that is, the solution to the equations of the theory) with the lowest possible energy (the ground state of the Hilbert space). In quantum electrodynamics this vacuum is referred to as ‘QED vacuum’ to separate it from the vacuum of quantum chromodynamics, denoted as QCD vacuum. QED vacuum is a state with no matter particles (hence the name), and also no photons, no gravitons, etc.
Theoretically, in QCD vacuum multiple vacuum states can coexist. The starting and ending of cosmological inflation is thought to have arisen from transitions between different vacuum states. For theories obtained by quantization of a classical theory, each stationary point of the energy in the configuration space gives rise to a single vacuum. String theory is believed to have a huge number of vacua – the so-called string theory landscape.
— Wikipedia on Vacuum
2012.05.04 Friday ACHK
Inferiority complex is due to the failure of realizing that you are not a part of the universe, but the whole of universe.
You are a layer of the whole universe.
— Me@2012-04-25 12:28:32 PM
2012.05.04 Friday (c) All rights reserved by ACHK
這段改編自 2010 年 6 月 2 日的對話。
絕大部分類型的題目，都有對應的驗算技巧。你要在平日就學習定那些技巧，把它們儲存於「魔法筆記」之中。只要事前詳加背誦，考試時就可以高速運用。
如果有某一類題目，你想像不到有什麼驗算技巧的話，你就一定要立刻問我。
— Me@2012.05.04
2012.05.04 Friday (c) All rights reserved by ACHK
Another link is demonstrated by the Maxwell’s demon thought experiment. In this experiment, a direct relationship between information and another physical property, entropy, is demonstrated. A consequence is that it is impossible to destroy information without increasing the entropy of a system; in practical terms this often means generating heat.
Another, more philosophical, outcome is that information could be thought of as interchangeable with energy.
— Wikipedia on Information
2012.05.03 Thursday ACHK
Although phobias and depression might be attenuated by serotonin-altering drugs, this does not mean the individual’s situation has been improved, but only the individual’s perception of the environment. Sometimes, a lower serotonin level might be beneficial, for example in the ultimatum game, where players with normal serotonin levels are more prone to accept unfair offers than participants whose serotonin levels have been artificially lowered.
— Wikipedia on Serotonin
2012.05.03 Thursday ACHK
這段改編自 2010 年 3 月 20 日的對話。
現時的「大眾教育」模式是，在同一時間，一位教師對著一大班學生講課。那樣的教育成效，通常也不大。試想想，即使只對著一個人說話，要保證聽方明白，沒有誤解，就已經相當困難。
「對話」其實是一個互相 Model（建構思想模型）的過程。你我對話時，我是根據你的說話，推斷你的 思考結構 和 心理狀態 大概怎樣，從而將你的「思想模型」，安裝在我腦海中的一個「虛擬機器」之中。簡單一點講，我的腦海之中，會有一個「虛擬的你」，反之亦然。那樣，我就可以估計，下一句說話，應該對你講什麼。
隨著你我對話句子數目的增加，我腦中「虛擬的你」，就會越來越接近真實的你。而我所選擇的說話，亦會越來越令你共鳴。換句話說，你最終也會明白，我究竟在講什麼。
當我心中「虛擬的你」，非常接近真實的你，而你心中「虛擬的我」，又十分接近我的真身時，你我就為之「有默契」。
— Me@2012.05.03
2012.05.03 Friday (c) All rights reserved by ACHK
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The traditional ideal:
A world ruled by wise, loving, responsible elders
The present reality:
A world under the thumbs of utterly cynical predators
The strategic analysis:
Their weak point is their need to rationalize their acts, by sophistries
The radical proposal:
Create a computer model of the human predicament, that can unflinchingly put the lie to their rationalizations (ie: Robot Wisdom)
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– Robot Wisdom, Jorn Barger
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2010.02.01 Monday ACHK
Computer games make you reflect your daily life.
— Me@2012.04.30
2012.05.02 Wednesday (c) All rights reserved by ACHK
這段改編自 2010 年 6 月 2 日的對話。
你做題目做得慢的原因是，你不夠純熟。相反，你在平日已經訓練到自己足夠純熟的話，你就自然做得快。做得快，就自然有足夠的時間剩下來，作驗算之用。
正如，我問你 2 乘 3 是多少的話，你會立刻答我 6，而毋須經過任何有意識的刻意思考。如果你竟然需要花一秒的時間去思考，你就即是不熟悉乘數表。換句話說，你不懂做乘法。同理，其他課題的運算，凡是你需要明顯思考的，都是你不夠純熟，沒有把握的東西。你應該加重訓練，除非該個課題無關痛癢。
— Me@2012.05.02
2012.05.02 Wednesday (c) All rights reserved by ACHK
Wittgenstein (e.g. in his Lectures on the Foundations of Mathematics, Cambridge 1939) criticised Principia on various grounds, such as:
It purports to reveal the fundamental basis for arithmetic. However, it is our everyday arithmetical practices such as counting which are fundamental; for if a persistent discrepancy arose between counting and Principia, this would be treated as evidence of an error in Principia (e.g. that Principia did not characterize numbers or addition correctly), not as evidence of an error in everyday counting.
The calculating methods in Principia can only be used in practice with very small numbers. To calculate using large numbers (e.g. billions), the formulae would become too long, and some short-cut method would have to be used, which would no doubt rely on everyday techniques such as counting (or else on non-fundamental – and hence questionable – methods such as induction). So again Principia depends on everyday techniques, not vice versa.
Wittgenstein did, however, concede that Principia may nonetheless make some aspects of everyday arithmetic clearer.
2012.05.01 Tuesday ACHK
Live out of your imagination, not your history.
— Stephen R. Covey
2012.05.01 Tuesday ACHK
In quantum gravity, the metric tensor is a quantum observable. Also, the metric tensor determines the structure of the light cones and the rules for causality, and therefore the causal structure becomes uncertain and confusing. At any rate, string theory is smarter than we are and it is able to avoid these conceptual problems.
— Causality and entanglement
— Lubos Motl
2012.04.30 Monday ACHK
Physics Town 
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