Life as a recursion 3
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You like someone because you know that she likes you.
Someone likes you because she knows that you like her.
— Me
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2010.01.20 Wednesday
Life as a recursion 3
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You like someone because you know that she likes you.
Someone likes you because she knows that you like her.
— Me
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2010.01.20 Wednesday
The least of all evils 3
(安:其實可以把”眾害取其輕”這個概念表達成”成本最低”。)
意思一樣。
但是,表達成”眾害取其輕”(the least of all evils)的好處是,它強調有evil(害/邪惡)的存在。
而”成本最低”則沒有強調有evil,因為”成本”這個詞語是中性的。
”evil”卻表示你一定要忍受一些很難忍受的事情。
(安:把”least cost”譯成”成本最低”不太準確。可能將它譯做”代價最低”會好一點。)
都是不太好。
因為”成本/代價/cost”在人們心目中是理所當然的。例如:買東西當然有cost,當然要付出金錢時間。
但是”害/邪惡/evil”在人們心目中卻不是理所當然的:為什麼要容許”邪惡”的存在呢?
”眾害取其輕”(the least of all evils)這個表達式
對我思考(intellectual mind)有很大啟發:
有些時候,”邪惡”是必須的,唯有接受。
但是, ”接受” 不代表 ”坐以待斃”。
反而,我們應努力把邪惡減到最低,即是眾害取最輕。
— Me@2010.01.19
2010.01.19 Tuesday (c) All rights reserved by ACHK
I should explain that “Yang-Mills” theories are nonlinear generalizations of electrodynamics which can describe forces such as the weak and strong interactions.
— How Far Are We from the Quantum Theory of Gravity?, R. P. Woodard
Yang–Mills theory is a gauge theory based on the SU(N) group. It was formulated by Yang and Mills in 1954 in an effort to extend the original concept of gauge theory for an Abelian group, as was quantum electrodynamics, to the case of a nonabelian group with the intention to get an explanation for strong interactions.
— Wikipedia on Yang–Mills theory
2010.01.19 Tuesday ACHK
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The faster the bicycle, the more stable it is.
— Me@2010.01.15
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2010.01.19 Tuesday
The least of all evils 2
我覺得世人(包括我以前的自己)沒有”眾害取其輕”這個概念。
他們覺得有問題就一定要解決。
在沒有權衡輕重的情況下解決問題,往往會來帶來更大的問題。
例如:
”一試定終身”的意思是一次公開考試(六個小時)的成績好壞,決定一生的前途。
”一試定終身”引起很大的問題:有些學生平時成績很好,但是到正式公開考試時一時失準,即斷送一生的前途幸福。這似乎不太公平。
於是,考試局便發明了SBA(校內評估)。SBA的成績佔整體成績的20%。例如,中六中七物理科大概每一至兩個星期有一次實驗課。每次實驗課後,都要交一份實驗報告。一份報告往往花學生十至二十小時。這份報告幾乎是完全對學生的物理知識沒有幫助的。它卻每次花掉學生二十小時,導致他們沒有足夠的溫習時間。
SBA的原意是避免”一試定終身”。但是,SBA卻為學生帶來更大的困擾。
”沒有SBA”反而是兩害中較輕的一個。
如果考試局當局懂得”兩害取其輕”(take the less of two evils)的話,就應該取消SBA,維持原本”一試定終身”的制度,除非有害處更小的第三種選擇。
有時,有問題不一定要解決,因為,維持原本有問題的狀態,可能是眾害中最輕的一個。
— Me@2010.01.18
2010.01.18 Monday (c) All rights reserved by ACHK
The least of all evils 1
我發覺”眾害取其輕”這個概念很有用,因為它幫我擺脫了很多無謂的心結、無謂的煩惱。
我有一位朋友,他需要考某一專業試。他將要花大量的溫習時間和支付昂貴的考試費(合共港幣三萬多元)。
我就叫他一併考慮其他的方案,例如不考專業試,有沒有其他方法從事該個行業?
如果有的話,”其他方法”的成本會不會高過三萬多元?
如果”其他方法”的成本比”考專業試”的成本還要高的話,那”考專業試”已是眾害之中最輕的一個(the least of all evils)。
那樣,即使你選擇了考專業試,支付昂貴的考試費,你也毋須自責或者傷心,因為你已經從眾害取其輕。
我覺得世人(包括我以前的自己)沒有”眾害取其輕”這個概念。
他們覺得有問題就一定要解決。
在沒有權衡輕重的情況下解決問題,往往會來帶來更大的問題。
— Me@2010.01.17
2010.01.18 Monday (c) All rights reserved by ACHK
The least of all evils (prequel)
我們不可以純粹因為有好處而做一件事;
亦不可以純粹因為有壞處而不做一件事。
大部分事情,都同時有好處和壞處。
不能 只見好處而不見壞處 或者 只見壞處而不見好處。
做不做一件事,應該考慮其整體好壞處的多寡。
— Me@2010.01.17
2010.01.18 Monday (c) All rights reserved by ACHK
學士 朋友
碩士 拍拖
博士 結婚
失業 離婚
— Me@2010.01.17
— Me@2023-06-08
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2010.01.18 Monday
The dynamics of photons in the double-slit experiment describes the relationship between classical electromagnetic waves and photons, the quantum counterpart of classical electromagnetic waves, in the context of the double-slit experiment. Superficially, it may look like the dynamics of a photon can be completely described by the classical Maxwell’s equations with only a reinterpretation of the classical field as a probability amplitude for the photon, however this notion is fraught with danger and ultimately leads to contradictions. One should not simply assume that the electromagnetic fields are a wave-function for the photon. For one thing, they are real and thus contain both positive and negative frequency components, which cannot be reconciled with the requirement for Schroedinger wavefunctions which are complex, positive frequency only. In addition, the electromagnetic fields are observable (e.g. with an oscilloscope) while Schroedinger wavefunctions are not observable, even in principle. Clearly, then, the fields are not wavefunctions, are physical, observable fields, rather than merely what you take the modulus-square of to obtain the probability of finding a photon somewhere. The existence of some “wavefunction of the photon” is not a fully settled issue.
— Wikipedia on Photon dynamics in the double-slit experiment
2010.01.17 Sunday ACHK
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Men must be taught as if you taught them not,
And things unknown proposed as things forgot.
— Benjamin Franklin
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2010.01.17 Sunday
結婚前要預視二十年後的
對方容貌 和 與對方的生活。
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她二十年後會變成這樣,
你還會選擇她嗎?
— Collected and modified by
— Me@2000.07.06
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2010.01.16 Saturday
(安:這不是你的問題。要聽得明你的說話需要相當高的level(水平)。而在我接觸到的人之中,達到這個level的人很少。)
而這種level,並不是人生經驗好多的那種level,又不是IQ要很高的那種level。而是”思考層次”的那種level。
…
我發覺有學生是聽得明我的說話。所以我懷疑這種”level”並不是來自人生經驗,而是那些人本身就有該種level。
…
雖然聽得明我的說話的人很少(比例上),但是由於人口好多,還是會有一定數量的知音。
如果每一萬個人,只有一個明白我的說話,那地球就會有六十萬人明白我的說話。
6,000,000,000 x 1/10,000 = 600,000
而那六十萬人中,可能有幾千人願意購買我的服務、書籍 或 產品。那樣,我就會有足夠的金錢維生。
(安:但是,那六十萬人怎樣會知道你的存在?又或者,你怎樣可以找到那六十萬人呢?)
Google!
— Me@2010.01.15
2010.01.15 Friday (c) All rights reserved by ACHK
如果我要上班, 就會所有興趣都發展不到。
我的興趣包括 物理、英文、對話 和 教育等。
無論你有什麼才能,
你都不能做到高過你上司智力的事情。
即是說,你有什麼才能都不能發揮,如果你是做一份一般的工作。
所以,你要發揮才能,就要找一個比你聰明的上司。
(安:又或者找一個不管你,用一個高度自治管理方式的上司。)
如果是這樣的話,即是該位上司很有智慧。
那即是和我第一點”找一個比你聰明的上司”無大分別。
如果不能找一個比自己聰明的上司的話,唯有自雇。
自雇的話,就不可以直接從其他人身上學到新事物。
但是,起碼不會被別人破壞自己的工作成果。
自雇的性質是,如果成功的話,會有很多顧客(上司)。
如果其中一位顧客(上司)不再錄用你時,你還有其他的顧客(上司)。
自雇的好處是,如果成功的話,不會被裁員,不會突然失業。
自雇的不好處是需要超巨大量的知識。
而且,起步時的收入近乎零:頭一年要過著貧窮的生活。
— Me@2010.01.14
2010.01.15 Friday (c) All rights reserved by ACHK
Life as a recursion 2
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Sometimes, you fear because you know that you will fear.
Other times, you do not fear because you know that you will not fear.
— Me
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2010.01.15 Friday
Best 6
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The greatest enemy of “the best” is “the second best”.
— Me@2010.01.12
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2010.01.14 Thursday
Best 5
Fear | Hope 2
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Do everything you fear is the way to get everything you want.
— Me@2010.01.12
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2010.01.13 Wednesday
有兩次測驗︰
第一次測驗前沒有溫習,
第二次測驗前溫了習。
不知怎樣,第二次的成績反而差過第一次。
為什麼溫了習反而會得較低分﹖
第一,這種情況不是每次都發生。最多只能說,有時溫了習會較低分,有時溫了習會較高分。不能說,任何情況下溫習都會降低分數。
哪為什麼有時溫了習反而會得較低分﹖
第二,事物通則︰物極必反,過猶不及。任何事情做得過量就會有反效果。溫習適量,對成績有提昇。溫習過量,對成績有傷害。
為什麼呢﹖
溫習是建立知識的過程,好像建立一幢大廈一樣。最初是起鋼筋。當大廈已經有足夠鋼筋時,你就應該建外牆。建了外牆後,就要加內部結構,如此類推。
最後,大廈內部要有空間給人住,給人活動。大廈的內部如果都有鋼筋的話,只會破壞大廈應有的格局,阻礙住客的活動。
溫習適量,意思是(該次測驗的)知識結構已經建立好。建立好了,就應該停止”輸入資料式的溫習”(鋼筋)。改為鞏固腦有內已有的知識(加外牆)。例如︰做練習,背誦重要的句子,或背誦公式等。甚至只是”休息”, 讓大腦(潛意識)自動整理已有的知識。
測驗時,大體有兩類題目。
第一種是書中已有的東西,考驗你記憶力,考驗你有沒有溫習。
第二種是書中沒有明言的東西,考驗你的創意,考驗你能否將知識融會貫通。
溫習過量的話,會破壞知識應有的格局,阻礙思考,令創意沒有發揮的空間。
遇到第二種題目的話,你將會未必想到解決的方法。
哪怎樣可以知道溫習是過少,適量,還是過多﹖
你自己會自然知道的︰
當你越溫越自信時,你就應該繼續溫。
當你越溫越惶恐時,即是你的溫習已經過量。你的溫習正在破壞你剛建立好的知識結構。你應該停止。
第三, “有心栽花花不香, 無心插柳柳成蔭。”
想像以下兩情況︰
一, 當你沒有溫習的情況下去測驗,不祈望高分,只求盡力而為,拿得一分得一分。
二, 當你有溫習的情況下去測驗,祈望高分。
比較這兩種情況,有些時候(不是任何時候),第一種情況會得到較高分。
原因有二︰
一, 當你祈望一定要高分時,你會較緊張,創意會較低。
二, 不懂權衡輕重︰有時祈望每題也十全十美,你會花過多時間去做開頭的題目,力臻完美,導致沒有足夠時間做其他的題目。
哪應該怎樣做才達致最高分數﹖
不要第一、二種情況,要第三。
一。 當你沒有溫習的情況下去測驗,不祈望高分,只求盡力而為,拿得一分得一分。
二。 當你有溫習的情況下去測驗,祈望高分。
三。 當你有適量溫習的情況下去測驗,不祈望高分,只求盡力而為,拿得一分得一分。
要達致這種心理狀態, 不一定很容易。要反覆練習。
“把手緊握 什麼都沒有 把手放開 你得到一切” — 臥虎藏龍
— Me@2009.05.27
2010.01.12 Tuesday (c) All rights reserved by ACHK
Timetable for high school study 3
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| Duration | Subject | Focus Area |
|---|---|---|
| 30 minutes | Maths | Recently learned materials |
| 30 minutes | Maths | Recently learned materials |
| 30 minutes | Maths | Exam paper training |
| 30 minutes | Maths | Exam paper training |
| 30 minutes | Maths | Old chapters |
| 30 minutes | Maths | Old chapters |
The second benefit of using a structured timetable is that it enhances your ability to concentrate.
Concentrating for extended periods can be challenging. If you set an expectation of focusing for three hours straight, you are likely to find it overwhelming, leading to wasted time and feelings of guilt. In contrast, committing to only 30 minutes of focused study is much more manageable and achievable.
During each 30-minute session, it is crucial to dedicate your full attention to revision. Avoid distractions such as:
If any thoughts or tasks come to mind, jot them down to address later. Only attend to them if there is an emergency, like a fire.
Most importantly, do not check the time during your study sessions. Watching the clock can disrupt your concentration and break your flow of thought. Instead of glancing at your watch, consider using an alarm to signal the end of each study period.
After every 30-minute session, allow yourself a 5-minute break to recharge:
| Duration | Activity |
|---|---|
| 30 minutes | Maths: Recently learned materials |
| 5 minutes | Break |
| 30 minutes | Maths: Recently learned materials |
| 5 minutes | Break |
| 30 minutes | Maths: Exam paper training |
| 5 minutes | Break |
| 30 minutes | Maths: Exam paper training |
| 5 minutes | Break |
| 30 minutes | Maths: Old chapters |
| 5 minutes | Break |
| 30 minutes | Maths: Old chapters |
| 5 minutes | Break |
During these 5-minute breaks, you can engage in activities that are not permitted during the 30-minute study slots, such as replying to phone calls. Once the break ends, refocus your attention for the next study session.
By consistently implementing this strategy of dedicated 30-minute study slots, you can accumulate 3 hours of concentrated study after completing 6 sessions. Concentrating for 30 minutes at a time is far more manageable than attempting to focus for an entire three-hour block.
— Me@2024-09-25 08:39:55 PM
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2010.01.12 Tuesday (c) All rights reserved by ACHK
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Set your sights high, the higher the better. Expect the most wonderful things to happen, not in the future, but right now. Realize that nothing is too good.
— Eileen Caddy
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科學精神
無事不可能
— Me@2010.01.12
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2010.01.12 Tuesday
Timetable for high school study 2
| Duration | Monday | Tuesday | Wednesday | Thursday | Friday |
|---|---|---|---|---|---|
| 3 hours | Maths | A.Maths | Physics | Maths | A.Maths |
| 1 hour | Chinese | English | Chinese | English | Chinese |
| 3 hours | Chemistry | Biology | Accounting | Chemistry | Biology |
Once you have got used to the timetable system, you can upgrade it by creating 30-minute time slots.
| Duration | Subject |
|---|---|
| 3 hours | Maths |
The first 3-hour time block should be divided into six 30-minute time slots:
| Duration | Subject |
|---|---|
| 30 minutes | Maths |
| 30 minutes | Maths |
| 30 minutes | Maths |
| 30 minutes | Maths |
| 30 minutes | Maths |
| 30 minutes | Maths |
The first benefit of this method is that the time slots can be used for different aspects of the same subject:
| Time Slot | Activity |
|---|---|
| 30 minutes | Maths: Recently learnt materials |
| 30 minutes | Maths: Recently learnt materials |
| 30 minutes | Maths: Exam paper training |
| 30 minutes | Maths: Exam paper training |
| 30 minutes | Maths: Old chapters |
| 30 minutes | Maths: Old chapters |
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2010.01.11 Monday (c) All rights reserved by ACHK
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