Author Archives: rpflee

兩次測驗

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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

Half an Hour 2

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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

Benefits of a Timed Study Approach

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:

  • Going to the washroom
  • Eating snacks
  • Responding to phone calls

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.

Key Focus Strategies

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

Best 4

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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 copyright ACHK

Half an Hour 1

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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

超時空接觸

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The Machine 3

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David Drumlin: I know you must think this is all very unfair. Maybe that’s an understatement. What you don’t know is I agree. I wish the world was a place where fair was the bottom line, where the kind of idealism you showed at the hearing was rewarded, not taken advantage of. Unfortunately, we don’t live in that world.

Ellie Arroway: Funny, I’ve always believed that the world is what we make of it.

— Contact (1997 film)

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2010.01.11 Monday ACHK

Past papers

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“Past papers” means “past HKCEE/HKAL examination papers”. The topic is for Hong Kong students who are facing the HKCEE or HKAL. But the general principles can also be used for tackling other public examinations.

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做 pastpaper 有兩種方法：

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1. 按年份做：例如今天做 1990 年的考試題目，明天做 1991 年的考試題目，如此類推。

每次一定要計時計分。即是要限時完成，完成後要為自己批改，計分數。然後做改正。

這方法有多個好處：

  • 每次計時間計分數，相當於每次也是模擬考試。每次除了考驗自己，對該科的學識外，同時也訓練自己的，心理質素、時間管理、檢驗答案 等技巧。

  • 每次也知道自己的分數，可以客觀知道，自己的實力，不會有無謂的自卑，或者不切實際的期望。每天有一個明確分數，可以見到自己的進步。這樣就可以避免，不必要的不安情緒。

  • 因為每年的 pastpaper 都包含了，幾乎所有課題 (topics)。這樣，可以避免「溫了一個 topic 後，會忘記之前 topic」 的情況：不斷按年份做 pastpaper，自然不斷反芻所有 topic，記得所有 topic。

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2. 按 topic 做：有兩種情況，應該按 topic 練 pastpaper：

  • 有新學的 topic

  • 有特別弱的 topic

按 topic 做 pastpaper 時，應該先做 MC (Multiple Choices)。MC 可以先幫你，釐清概念 (concepts)：

MC 不像 LQ (Long questions)。每題 LQ 都分成幾 part，逐步教你完成整題題目。即使你不完全明白該題目，也可以拿到一定的分數。但是，MC 是沒有步驟提示的。而且，同一題MC 的各個選擇，都相當接近，concept 稍為不清晰，一分都得不到。

每個 topic/chapter 其實來來去去考的，都只是幾個主要的，concept 或者技巧。對初學者來說，要知道該幾個 concept，或技巧是什麼。並不容易。但是，當同類（同一 topic) 的MC放在一起時，由於它們會用不同的字眼，不斷地重複問，同樣的幾個 concept，即使對初學者而言，都會對那幾個主要concept/技巧，有較深刻的印象。

記住：按 topic 做 pastpaper 時，先做 MC，再做 LQ。

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兩種方法都要使用。兩種方法相輔相成：按年份做，自然知道自己, 在哪些 topic 特別弱，從而針對該幾個 topic，專練該幾個 topic 的 pastpaper。

— Me@2010.01.10

— Me@2010.05.21

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2010.05.21 Friday (c) All rights reserved by ACHK

Blogger

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I think one of the things that kills great things so often is compromise — letting people talk you out of what your gut is telling you. Not that I don’t value people’s input, but you have to have the strength to ignore it sometimes, too. If you feel really strongly, there might be something to that, and if you see something that other people don’t see, it could be because it’s that powerful and different. If everyone agrees, it’s probably because you’re not doing anything original.

— Evan Williams, Founders at Work

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2010.01.09 Saturday ACHK

Timetable for high school study

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In preparation for the HKCEE, HKAL, or other public examinations, it is advisable to dedicate 5 to 7 hours each day to your studies. Assuming you are focusing on 8 subjects:

  • Chinese
  • English
  • General Mathematics (G.Maths)
  • Additional Mathematics (A.Maths)
  • Physics
  • Chemistry
  • Biology
  • Accounting

You may organize your timetable as follows:

Day Monday Tuesday Wednesday Thursday Friday
3 hours Maths A.Maths Physics G.Maths A.Maths
1 hour Chinese English Chinese English Chinese
3 hours Chemistry Biology Accounting Chemistry Biology

Timetable Design Details

  • Subject Categories:
    • The first row is designated for non-language subjects.
    • The second row is reserved for language subjects.
    • The third row comprises other non-language subjects.

Principles of the Timetable Design

  1. Diverse Subject Nature:
    Each day, the first and second non-language subjects should differ in nature. For instance, the first row should consist of mathematical subjects (G.Maths, A.Maths, Physics), while the third row should contain non-mathematical subjects (Chemistry, Biology, Accounting). This approach ensures that you engage different areas of the brain, preventing fatigue from studying similar subjects consecutively.

  2. Cognitive Buffer:
    The language subject placed in the middle serves as a buffer, providing your brain with a necessary respite.

  3. Automated Structure:
    The timetable is designed to be automatic, eliminating the need for daily adjustments. The sequence for each row is cyclical:

    • Mathematical Subjects: G.Maths → A.Maths → Physics → G.Maths → A.Maths → …
    • Language Subjects: Chinese → English → Chinese → English → Chinese → …
    • Non-Mathematical Subjects: Chemistry → Biology → Accounting → Chemistry → Biology → Accounting …
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  4. Study Rhythm:
    Studying each subject should resemble a marathon; there will be times of intensity and times of ease, but it is crucial to maintain momentum. Halting your studies can make it challenging to resume. This timetable ensures that no subject is neglected for too long.

Feel free to personalize your timetable according to your needs. For instance, if finding 7 hours in a day proves difficult, you can adjust the structure from (3 hours + 1 hour + 3 hours) to (2 hours + 1 hour + 2 hours).

— Me@2024-09-25 11:38:41 AM

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2010.01.08 Friday (c) All rights reserved by ACHK

Teachers

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The most important teachers in my life

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Ken Chan (engineer and physicist)

Lee Tien-Ming (philosopher)

Richard Stallman (programmer, inventor of Copyleft)

Paul Graham (programmer and essayist)

John C. Baez (mathematical physicist)

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— Me@2010.01.07

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2010.01.08 Friday copyright ACHK

Encyclopedia Galactica

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我的百科全書

自小(中三)的夢想是學會所有的知識,

所以對”百科全書”這個概念很有興趣.

中四時, 閱讀Bill Gates的The Road Ahead.

書中提到<>, 售價超過港幣萬多元.

而 Microsoft Encarta 百科全書CD-ROM只需數百元.

我當時已經覺得很神奇.

在2001年, 我花二百多元買了<>的CD-ROM.

我花了不少時間閱讀. 印象最深刻的內容是

當年Windows 95宣傳攻勢的成效大到有人為了用Windows 95而第一次買電腦.

在2004年, 我發現了<>. 它竟然是免費的.

而且它還有很多傳統百科全書不可能有的資料,

例如卡通人物的傳記.

新科技和創意已經將人類帶進了比科幻小說更加神奇的年代.

— Me@2010.01.06

2010.01.07 Thursday (c) ACHK

Categorifying Fundamental Physics

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A fundamental fact about quantum theory is that these operators fail to commute: aa* – a*a = 1 in units where Planck’s constant is 1. Remarkably, this fact has a simple combinatorial interpretation: there is one more way to add an element to a finite set and then remove one, than to remove one and then add one.

— Categorifying Fundamental Physics, John Baez

2010.01.06 Wednesday ACHK

Bootstrapping

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Bootstrapping (computing), starting a computer or building complex software tools by loading or building simple tools that allow the creation of the more complex tools. Shortened to booting to describe the process of starting up a computer.

Bootstrapping (compilers), writing a compiler for a computer language using the language itself after a first highly simplified compiler is written in another language.

— Wikipedia

2010.01.05 Tuesday ACHK

Chrono Trigger

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Setting Out! The Dreamy Millennial Festival
The Queen who Returned
The Vanished Princess
I’m Home!
Kingdom Trial
Across the Ruins……
Factory Ruins in the Land of Mystery
The Farthest Reaches of Time
People of the Demon Village
Appeared: The Legendary Hero
Tarta and Frog
Red Stone, Rare Stone
Footprints! Track!!
Fight! Grandleon
Decisive Battle! Magus Castle!!
Before You Realize It, Primeval
Law of the Earth
Kingdom of Magic: Zeal
Release the Seal, Call Forth a Storm
The Philosopher on Grief Mountain
That Which Awaits in the Sky
The Call of Lavos
The Ancient Era’s New King
The Egg of Time
To the Fateful Time……
At the End of the Planet’s Dream

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— Chrono Compendium

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2010.01.03 Sunday ACHK