(反對)開夜車 4.1

本文章並(!)不(!)可作為醫學建議。如需醫學意見,請諮詢專業人士。

(問:但是,在現今社會,無論是上班,或是讀書,完全不「開夜車」,又好像不切實際。)

其實,主要是講讀書時代。如果在工作時代,你的職位需要,你時常「開夜車」的話,你根本就應該另謀高就。

試問,世間上,有什麼工作,竟然值得你冒生命危險,去時常「開夜車」呢?

.

言歸正傳,讀書時代,如果時間管理得宜,需要「開夜車」的情況,其實是很少。

(問:那樣說有意思嗎?我正正是問你,在時間管理失宜,需要「開夜車」時,該如何自處?)

一定「開夜車」的話,你至少要做到以下幾點,去保障自己的安全:

  • 只可以間中,不可以經常。

  • 日間中途要有小睡。

  • 平均而言,你仍必須要有,充足的睡眠。亦即是話,某一天睡少了,必須於在當個星期,還回「睡債」。

    • 例如,如果你的充足睡眠是,每天七小時,而你在某一天只睡了六小時的話,你就有義務,在當個星期的另一天,睡多一小時。

.

另外,有時,只要跳出框框,破格思考,或者,只要你的時間表稍改一點,就根本毋須「開夜車」。

本文章並(!)不(!)可作為醫學建議。如需醫學意見,請諮詢專業人士。

— Me@2019-06-06 08:23:56 PM

.

.

2019.06.08 Saturday (c) All rights reserved by ACHK

追憶逝水年華, 3

In Search of Lost Time, 3 | (反對)開夜車 3.1 | 止蝕 4

.

其實,我中五那年,試過企圖「開夜車」。詳細過程怎樣,已不太記得。但是,總體的感受,仍然是深刻。

那時,我有很多天真的想法,例如:

1. 只要每晚睡少四小時,就每晚可以多四小時溫習。

2. 只要每晚可以多四小時溫習,就可以追回之前,落後了的進度。

.

實情是,「貪心」帶來「貧窮」:

很多時,我也是覺得自己,溫習的進度落後了,來不及準備那年的公開試。所以,想透過凌晨(例如)三時起牀,來追回之前,落後了的進度。但是,我卻幾乎每天凌晨,也起不到牀,導致溫習大計失敗,遺撼非常。繼而,因為失落了,更多的時間,我就覺得,更加需要在下一天,凌晨起牀。

惡性循環,持續了很久,浪費了我大量的時間。其實,只要我睡眠適量,作息定時,反而有不少機會,有上佳的成績。

現在回想起來,仍然驚嘆著,為何年輕時,可以那麼愚蠢。

只可以說,人在惶恐時,多麼糊塗的事,都可以發生。

— Me@2019-05-09 10:04:55 PM

.

.

2019.05.10 Friday (c) All rights reserved by ACHK

(反對)開夜車 2.5

本文章並(!)不(!)可作為醫學建議。如需醫學意見,請諮詢專業人士。

(問:「只要飛蚊不惡化」?你怎能保證?)

不能。那正正就是,我更大的苦惱。

一日不能知道,我當年開始患飛蚊症的真正原因,我也會不安,擔心症狀加劇。

「飛蚊症」只是某個或某些疾病的一個「症」,而不是「疾病」本身。一日不能知道,我飛蚊症的病因,我也不能有力預防,症狀的加劇。

(問:你不是說,長期夜睡少睡,導致你的飛蚊症嗎?)

那只是估計,不是肯定。

那一段時間,「出事」前的一兩個星期,我剛好時常睡不著,導致睡了很少。所以,長期夜睡少睡,很可能是主要的原因。

當然,如果平日的睡眠充足,並不會因為單一事件,某一晚的夜睡少睡,就立刻有飛蚊。如果人體是那麼沒有彈性,人類這種生物,可能一早就已經絕種了。

但是,如果是長期夜睡少睡,身體自然會越來越虛弱。到達某個臨界點時,意外事件就可以隨時發生。從相反的角度來講,如果平日睡眠適量,就等於刪除了,飛蚊症的其中一個主要誘因,從而大大減低了,其發生的機會率。

本文章並(!)不(!)可作為醫學建議。如需醫學意見,請諮詢專業人士。

— Me@2019-04-13 03:34:33 PM

.

.

2019.04.15 Monday (c) All rights reserved by ACHK

(反對)開夜車 2.4

本文章並(!)不(!)可作為醫學建議。如需專業意見,請諮詢專業人士。

至於,我自己的案例,則幸好是良性的,不會致盲;只要飛蚊不惡化,視力不會減弱。

(問:但你剛才說,飛蚊症「會帶來精神困擾」?)

無錯。可以說是心靈創傷。

(問:為什麼呢?)

如果你買了一個電腦熒光幕,發現有死點,你會怎樣做?

(問:立刻要求商戶更換。新買的電器,必定在保養期內,可以更換。)

假設不可更換呢?

(問:如果只是一兩點的話,應該不會太明顯。我會先用它,直到幾年後才再換。

但是,如果不只是一兩點的話,我可能會忍受不到;如果我負擔得起,我會立刻買過另一部。)

再假設,你永久不能更換熒光幕呢?

(問:永久有死點?)

無錯。

(問:那又真的,十分不自在。

你的意思是,「熒光幕永久有死點」就是患飛蚊症的感受?)

無錯。

所以,患了飛蚊症以後,我一聽到「不可逆轉」這四個字,就有一點兒緊張;患了飛蚊症以後,我以為,我人生不可能再快樂。

幸好,一年之後,我竟然習慣了——只要飛蚊不惡化,我就不會因為那些「死點」,而明顯不開心。

(問:「只要飛蚊不惡化」?你怎能保證?)

不能。那正正就是,我更大的苦惱。

一日不能知道,我當年開始患飛蚊症的真正原因,我也會不安,擔心症狀加劇。

「飛蚊症」只是某個或某些疾病的一個「症」,而不是「疾病」本身。一日不能知道,我的飛蚊症的病因,我也不能有力預防,症狀的加劇。

(問:你不是說,長期夜睡少睡,導致你的飛蚊症嗎?)

本文章並(!)不(!)可作為醫學建議。如需專業意見,請諮詢專業人士。

— Me@2019-03-18 04:47:58 PM

.

.

2019.03.18 Monday (c) All rights reserved by ACHK

(反對)開夜車 2.3

Ken Chan 時光機 1.4.2.3

.

本文章並(!)(!)可作為醫學建議。如需專業意見,請諮詢專業人士。

結果,他那天只睡了,一個半小時。

.

我那時以為,那沒有什麼大不了。但是現在,我也已一把年紀了,才驚覺,只要有一點不幸,那就可以造成,嚴重的後果。

(問:那有什麼「嚴重的後果」?)

「嚴重後果」中,較為輕微的,我也經歷過,而且可以視為「不可逆轉」的。

例如,大前年開始,我左眼患有飛蚊症。即是話,視野中,有一些黑點等,不應存在的小垃圾。

飛蚊症可以視為「不可逆轉」的原因是,以現今科技,醫治飛蚊症方法,風險遠比「良性飛蚊」的症狀本身高。所以,除非一個人的飛蚊症極度嚴重,否則,眼科醫生也不會建議病人,去接受那些手術。

(問:「良性飛蚊」?)

「良性飛蚊」的「良性」,並不是說真的有益,而只是指「不會致盲,只會帶來精神困擾」。

至於「惡性飛蚊」,即是指「有致盲風險」,因為,那代表著,視網膜開始脫落;必須立刻做手術制止之。

(問:如果開始有飛蚊,自己又怎會知道是,「良性」還是「惡性」呢?)

不會知道。

所以:

  • 第一,你要在未有飛蚊時,防範於未然。

  • 第二,萬一仍然出現飛蚊的話,要立刻看眼科醫生,讓他為你檢查,是否視網膜開始脫落。

    • 如果不是,就不用擔心。

    • 如果是,可以立刻做手術,制止視網膜脫落,保住完整的視力。視網膜開始脫落,而不立刻做手術制止之,有致盲的風險。

.

至於,我自己的案例,則幸好是良性的,不會致盲;只要飛蚊不惡化,視力不會減弱。

(問:但你剛才說,飛蚊症「會帶來精神困擾」?)

無錯。可以說是心靈創傷。

(問:為什麼呢?)

本文章並(!)(!)可作為醫學建議。如需專業意見,請諮詢專業人士。

— Me@2019-02-25 04:01:37 PM

.

.

2019.02.26 Tuesday (c) All rights reserved by ACHK

(反對)開夜車 2.2

Ken Chan 時光機 1.4.2.2

.

The light that burns twice as bright burns half as long, …

— Blade Runner (1982)

可能,因為他「溫習到凌晨」式的方法,對他來說有效,他亦鼓勵學生那樣做。

我現在的記憶,暫時未能確定,他在課堂中,有沒有明示推介過,用這個方法。但是,我記得在他派發的筆記中,其中一頁,有一個正在深夜讀書的漫畫。而在漫畫下面,有一句「study to 3 a.m.」(讀書至深夜三點鐘)。

.

長話短說,我是反對這個方法的,理由有很多,例如:

第一,長期睡眠不足,會導致腦袋呆了,大大減低下一天的工作效率。

第二,長期睡眠不足,會導致身體時常病。

在 Ken Chan 的部分課堂,特別是假期的補課中,我就見到他時常咳嗽。可能,他在工作時代,仍然過著,極度忙碌的生活。

.

還記得在九月,在課程的第一課,他就已經遲到,遲了大概 15 至 30 分鐘之間。那課原定於早上八時半開始。上課中途,他有點咳嗽。他說,因為當天早上之前,吸入了太多的氮氣。他懷疑一位同事,作弄了他。

話說,他工作的地方,有一部儀器壞了。他的同事跟他說:「部機好似壞咗,漏緊啲 nitrogen 喎,你聞下係唔係?」(那儀器疑似壞了,正在洩漏氮氣。你聞一聞,看看是不是。)

Ken Chan 事後回心一想,才醒起:「Nitrogen 又點會有味咖?」(氮氣又何來會有味道呢?)

結果,他那天只睡了,一個半小時。

.

我那時以為,那沒有什麼大不了。但是現在,我也已一把年紀了,才驚覺,只要有一點不幸,那就可以造成,嚴重的後果。

— Me@2019-02-03 07:02:42 AM

.

.

2019.02.03 Sunday (c) All rights reserved by ACHK

(反對)開夜車 2.1

Ken Chan 時光機 1.4.2.1

.

之前提到,Ken Chan 所讀的中學不正常:

在中四和中五的校內考試測驗中,不斷地考核高考課程。所以,他在中四時代開始,已經要鑽研,高考程度和大學程度的物理。

那樣,他何來有,那麼多的時間呢?

那時,他往往要讀書,至通宵達旦。

.

那樣,他的公開試成績,又如何呢?

根據他所講,他事後發現,會考物理科中的 MC(多項選擇題)部分,錯了兩題;他達不到他原本,「全部科目全部滿分」的理想。

.

那樣,他又做不做到「狀元」,全部科目「奪 A」呢?

他在另一天的課堂中,暗示自己當年,差一點才做到「狀元」:

(我暫時不記得,他以下說話的上半句是什麼。)

… 如何不是那樣,我就毋須於,放榜當天的晚上,在家裡哭。唉!還是不說了。

當時,我想知道詳情。可惜,他真的沒有說下去,我也沒有辦法。

雖然,主觀而言,從他自己的角度,成績不是理想,因為,那不是「全部科目全部滿分」;但是,如果不是對自己,那麼苛刻的話,客觀來說,他的成績是上乘的。

.

可能,因為他「溫習到凌晨」式的方法,對他來說有效,他亦鼓勵學生那樣做。

我現在的記憶,暫時未能確定,他在課堂中,有沒有明示推介過,用這個方法。但是,我記得在他派發的筆記中,其中一頁,有一個正在深夜讀書的漫畫。而在漫畫下面,有一句「study to 3 a.m.」(讀書至深夜三點鐘)。

.

長話短說,我是反對這個方法的,…

— Me@2019-01-18 03:47:50 PM

.

.

2019.01.19 Saturday (c) All rights reserved by ACHK

Insomnia, 5

mingyeow 47 minutes ago [-]

I had signs of insomnia in the last couple of years. Tried all the usual techniques, and I realized those just do not work for one simple reason – that the moment I do not fall asleep, I become frustrated. And that frustration in turn makes sleeping much harder.

So, I tried doing the exact opposite, and my sleep has been tremendously better since.

Essentially, I force myself to keep my eyes open. When I catch myself falling asleep, I actually force myself to keep them often again. Before I know it, it is morning.

It sounds counter-intuitive, but all my insomnia problems are over, including on a plane. Would love to know if it works for others, or if it is just a silly thing that works for only me.

— Insomnia: To Pursue Sleep So Hard You Become Invigorated by the Chase

— Hacker News

.

.

2018.11.20 Tuesday ACHK

A pretty girl, 2

Women are directly fitted for acting as the nurses and teachers of our early childhood by the fact that they are themselves childish, frivolous and short-sighted; in a word, they are big children all their life long–a kind of intermediate stage between the child and the full-grown man, who is man in the strict sense of the word. See how a girl will fondle a child for days together, dance with it and sing to it; and then think what a man, with the best will in the world, could do if he were put in her place.

— Of Women

— Arthur Schopenhauer

.

When the elderly Schopenhauer sat for a sculpture portrait by the Prussian sculptor Elisabet Ney in 1859, he was much impressed by the young woman’s wit and independence, as well as by her skill as a visual artist. After his time with Ney, he told Richard Wagner’s friend Malwida von Meysenbug, “I have not yet spoken my last word about women. I believe that if a woman succeeds in withdrawing from the mass, or rather raising herself above the mass, she grows ceaselessly and more than a man.

— Wikipedia on Arthur Schopenhauer

.

Anybody can look at a pretty girl and see a pretty girl. An artist can look at a pretty girl and see the old woman she will become. A better artist can look at an old woman and see the pretty girl that she used to be. But a great artist — a master — and that is what Auguste Rodin was — can look at an old woman, portray her exactly as she is… and force the viewer to see the pretty girl she used to be…. and more than that, he can make anyone with the sensitivity of an armadillo, or even you, see that this lovely young girl is still alive, not old and ugly at all, but simply prisoned inside her ruined body. He can make you feel the quiet, endless tragedy that there was never a girl born who ever grew older than eighteen in her heart…. no matter what the merciless hours have done to her. Look at her, Ben. Growing old doesn’t matter to you and me; we were never meant to be admired — but it does to them. Look at her! (UC)

— Robert A. Heinlein

.

.

2018.10.27 Saturday ACHK

Insomnia

如夢初醒 4.2 | 讀書與睡眠 4.2

.

DrPhish 5 months ago [-]

This is exactly the Zen moment that fixed my lifelong insomnia: lying in bed relaxed with my eyes closed, even if I’m not asleep, leaves me feeling worlds better in the morning than fretting about not being able to sleep. It’s something that happened when I forgot about it completely. Once I realized I could literally just lie in bed for 8 hours and be OK, I was able to let go.

It’s like a trap that closes tighter about you the more you struggle, and releases if you allow yourself to relax[.]

Once I really got that, sleep became regular and uninterrupted[.]

laumars 5 months ago [-]

I discovered this recently too. Even in the instances when I still don’t get to sleep (eg my 1 year old coming into bed and wriggling in her sleep waking me) I’ve still felt more refreshed when I’ve relaxed rather than laid in bed wound up. I’m not into new age / whatever stuff but I like to think of it as night time meditation as while it’s still not as good as sleep it’s still a great deal better than full blown insomnia! And best of all, sometimes it clears your mind enough to actually sleep.

.

— Thinking of yourself as an insomniac may be a part of the problem

— Hacker News

.

.

2018.10.11 Thursday ACHK

Plato

trowawee 4 months ago

I’m a little frustrated at the tossed-off reference to Plato and Aristotle at the beginning – “The good life may have sufficed for Plato and Aristotle, but it is no longer enough.” – because I feel like that ignores the fact that both Plato and Aristotle, along with a lot of philosophers, actually had a lot to say about physical fitness. Plato was a champion wrestler, and both he and Aristotle viewed physical education as a fundamental component to living the good life. Xenophon quotes Socrates saying this:

“For in everything that men do the body is useful; and in all uses of the body it is of great importance to be in as high a state of physical efficiency as possible. Why, even in the process of thinking, in which the use of the body seems to be reduced to a minimum, it is matter of common knowledge that grave mistakes may often be traced to bad health.”

The whole article feels a little too mired in presentism, and ignorant of the history of self-improvement ideas.

.

coldtea 4 months ago

>Plato was a champion wrestler

And the name Plato is a nickname — meaning “the broad/wide one” given to him for his broad shoulders because of that training and physical appearance. Real name: Aristocles.

.

kernelbandwidth 4 months ago

It’s funny to consider that one of the canonically great philosophers in history is known essentially by the equivalent of his WWE wrestling name. It’s like if in the future there were classes taught on the philosophical ideas of “The Rock”.

.

coldtea 4 months ago

Some other amusing related stuff: so, Plato, was called for for the ancient greek word for broad/wide.

Modern [English] words that stem from the same root: plateau, platitude, plat, plate — via French and Latin (plattus) from Greek (platis “flat, wide, broad”).

.

danohu 4 months ago

Well, the first Pope was literally called The Rock (Peter). Jesus appointed him by saying “you are The Rock, and I’ll build my church on this rock”.

Exactly what he meant has led to centuries of debate between protestants and catholics.

.

acangiano 4 months ago

“No man has the right to be an amateur in the matter of physical training. It is a shame for a man to grow old without seeing the beauty and strength of which his body is capable.”

― Socrates

.

— Improving Ourselves to Death

— Hacker News

.

.

2018.06.01 Friday ACHK

Sleep apnea

erentz 3 months ago

Slightly tangential to the study here but I’ve been going down the sleep apnea rabbit hole in recent months and I strongly encourage folks to investigate their sleep. A lot of people have sleep apnea and don’t realize it. You don’t have to snore to have it. A surprising statistic I found was 20-30% of people with ADHD have sleep apnea. A lot of people may be treating symptoms of sleep apnea like ADHD and high blood pressure with medications while ignoring the root cause. My experience with this has been that doctors are surprisingly ignorant. They’ll happy prescribe you medications for anxiety, ADHD, blood pressure for years, and never think to ask you about your sleep. Do some of your own investigations or ask about it if you have any suspicions.

.

copperx 3 months ago

I’m going to add myself as a data point. After suffering years of feeling sleepy regardless of how much I slept and frequently unmotivated and withdrawn, I was diagnosed with severe sleep apnea. A few years ago I was given Dexedrine, Ritalin, Adderall, and I even tried self-medicating with modafinil to ameliorate the symptoms of what doctors thought was ADHD with varying levels of success; but the drug-free treatment of sleep apnea with a BiPAP machine got rid of all of these issues; in addition, I feel about ten years younger.

— Sleep and Mortality: A Population-Based 22-Year Follow-Up Study (2007)

— Hacker News

.

.

2018.05.09 Wednesday ACHK

Eyes on me

dziungles 14 days ago

Hey, this is really cool to see natural eyesight topic on the hacker news.
I practice this for more than 10 years. Each day I work with computer for ~10 h., drive a car and do other things, and never wear glasses, even though the traditional ophtalmologic measures clearly indicate that I need strong glasses and I shouldn’t see even the biggest letter on the Snellen chart, but I see not only the biggest, but sometimes even the 20/20.

Doctors can’t explain this, and only congrats me on my achievement. Of course, the eyesight is not perfect. I see clearly in the daytime, but in the nighttime or low light conditions it becomes much harder to distinguish faces.

The best book I found so far is “Relearning to See” by Thomas R. Quackenbush. The originator of this theory was William Bates.

Actually, there is no clear unified theory on how to achieve this. Everyone interprets it differently and the results are inconsistent. There is also a lot of criticism from the medical establishment.

Natural eyesight improvement really works. And the unified theory, in a form of an app, or a good book, maybe including findings from neuroplasticity, would be a great gift for humanity.

.

bsder 14 days ago

Natural eyesight improvement really works. And the unified theory, in a form of an app, or a good book, maybe including findings from neuroplasticity, would be a great gift for humanity.

It SORT OF works in stable and predictable situations.

What seems to be happening is that your brain, in all of its neuroplastic glory, is learning to make better inferences from the broken information it receives.

The issue is that this works as long as the inferences are correct. That’s fine when you are reading a newspaper, using the computer, etc. as the situation is stable and predictable.

The problem is that when you are suddenly confronted by a situation where the inferences are NOT correct–such as a nighttime emergency situation while driving. Now you are relying on the “uninferenced” data coming in from your eyes and that data is subpar with all the resultant problems.

The best solution is both: fix the data coming in with corrective lenses for unpredictable situations, and train your brain to make better inferences so you can deal with predictable situations better.

.

dziungles 14 days ago

Before, I also had this theory in my mind for a year or so.
But for example, right now I’m in Thailand, traveling here for the first time. Everything is new, unfamiliar and unpredictable, daytime, nightime. I have no problems seeing things, everything is almost perfectly clear and sharp. I needed some time to adapt to a smaller screen of my laptop (I was using 24 inch before), but now I’m doing fine.

Actually, the more you look, the better you see. Like in Aaron Swartz blog post, if you want to retrain your weak legs, you need to walk more. Same with eyes.

https://web.archive.org/web/20180204094207/https://news.ycombinator.com/item?id=16194580

.

.

2018.02.09 Friday ACHK

Zooming out

In this morning’s dream, I had seen an ultra zooming out of the universe, where in the end the universe became a particle of a super-universe.

Perhaps the afterlife (or near-death experience) is like this kind of bizarre feeling.

— Me@2011.08.17 

It is a fractal.

— Me@2011.08.22

Note: This kind of feeling is unhealthy, since it is induced by eating too little food.

— Me@2017.01.09

Several months ago, I had another this kind of super-feeling dream, in which I could get a time traveling feeling.

— Me@2011.08.17 

2017.01.14 Saturday (c) All rights reserved by ACHK

End-of-history illusion

The end-of-history illusion is a psychological illusion in which individuals believe that they have experienced significant personal growth and changes in tastes up to the present moment, but will not substantially grow or mature in the future. Despite recognizing that their perceptions have evolved, individuals predict that their perceptions will remain roughly the same in the future.

The illusion is based in the fact that at any given developmental stage, an individual can observe a relatively low level of maturity in previous stages. The phenomenon affects teenagers, middle-aged individuals, and seniors. In general, people tend to see significant changes in hindsight, but fail to predict that these changes will continue.

— Wikipedia on End-of-history illusion

2015.03.29 Sunday ACHK

Fasting creates new brain cells

So, what’s going on?

Well, when they examined the brains of the fasting mice.

They found something extraordinary. 

These green objects are newborn brain cells.   

These three here are brand new?

Sporadic bouts of hunger actually trigger new neurons to grow.

Why should a brain start to generate new nerve cells when you stop feeding it?

If you think about this in evolutionary terms, it makes sense.

If you’re hungry, you’d better increase your cognitive ability.   

That will give you a survival advantage, if you can remember where the location of the food is and so on.

It seems that fasting stresses your grey matter the way that exercise stresses your muscles.

So hunger really does make you sharper?

Yes. We think so.   

Mark’s research is starting to point towards a simple conclusion.

Alternate day fasting has better effects on the brain than does a lower-amount-of-daily-calorie restriction.

It’s true of mice, but he needs to do proper human trials to prove it’s true in us.   

I’ve come to the end of my search to find out how to eat, fast and live longer.

The official advice is, eat at least 2,000 calories a day, and if you really want to fast, even on an intermittent basis, see your doctor first, because there are people it could harm such as pregnant women or those who are already underweight.

— Eat, Fast and Live Longer

— BBC Horizon

— Me@2013-10-05 1:06 AM

2014.11.13 Thursday ACHK

氣功

氣功有真有假。

健康的氣功,應不含宗教成份,應符合科學。

「真氣功」中的「氣」,是指「呼吸」。

健康的氣功,是透過呼吸的訓練,去促進血液循環。

如需查詢,請以電郵聯絡本人。

— Me@2014-08-20 01:42:40 PM

2014.08.20 Wednesday (c) All rights reserved by ACHK