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

I am a Strange Loop, 4.3

記憶奇異圈 1.3 | Godel, Escher, Bach, 2.3

這段改編自 2010 年 4 月 10 日的對話。


有關,但它只是例子,而不是主旨。Douglas 想帶出的是,「自我」意識,其實來自一些「Strange Loop」(奇異圈)。




Douglas 的成名作是《Godel, Escher, Bach》,就是透過眾多「奇異圈」的例子,企圖帶出「自我」和「意識」的來源。但是,由於書中的例子,橫跨了太多課題,例如,邏輯、數學、物理、繪畫、音樂、文字等,而又橫跨得十分精采,導致近乎沒有人,知道該書的主旨是什麼。

所以,作者於大概三十年後,寫了《I am a Strange Loop》(「我」是一個奇異圈)。為免再令讀者誤會,作者把該書的主旨,直接用作書名。



— Me@2014.09.29

2014.09.29 Monday (c) All rights reserved by ACHK

I am a Strange Loop, 4

Godel, Escher, Bach, 2

這段改編自 2010 年 4 月 10 日的對話。


我有很多這類想法,都是來自《I am a Strange Loop》(「我」是一個奇異圈)這本書。



《I am a Strange Loop》的作者是 Douglas R. Hofstadter。而 Douglas 的成名作是《Godel, Escher, Bach》。

我從《I am a Strange Loop》中,吸收很深厚的教學功力。我當時的感覺是相當震撼的。這書竟然可以將,那麼高深的概念,例如「哥德爾不完備定理」、「自我來源」、「多重自我」、「自我程式」等,逐步舖排,表達到連初學者的我,也能明白。而它的舖排,往往是橫跨幾個章。如果不是作者對那幾門知識,有極深刻的瞭解,他並不可能作到,那樣宏觀的佈局。

雖然當年的我,程度不低,但是,那時的我,並沒有那幾門學問的詳細背景知識。例如,在那之前,我只知道「數理邏輯」這個學問中,有幾條重要的定理,都叫做「哥德爾定理」。除了名字以外,我對「哥德爾定理」的理解近乎是零。但是,經過《I am a Strange Loop》的介紹,我就了解到「哥德爾定理」的核心思想是什麼。



— Me@2014.09.20

2014.09.23 Tuesday (c) All rights reserved by ACHK







— Me@2014-08-20 01:42:40 PM

2014.08.20 Wednesday (c) All rights reserved by ACHK

I Am Legend

Fair use rationale for I Am Legend

No free equivalent exists that would effectively identify the article’s subject.
The image does not in any way limit the ability of the copyright owners to market or sell their product.
The image is only used once and is rendered in low resolution to avoid piracy.

I Am Legend is a 2007 British-American post-apocalyptic science fiction horror film directed by Francis Lawrence and starring Will Smith. It is the third feature film adaptation of Richard Matheson’s 1954 novel of the same name, following 1964’s The Last Man on Earth and 1971’s The Omega Man. Smith plays virologist Robert Neville, who is immune to a man-made virus originally created to cure cancer. He works to create a remedy while defending himself against mutants created by the virus.

— Wikipedia on I Am Legend (film)

2014.07.16 Wednesday ACHK

The Lucifer Effect

Stanford prison experiment

Zimbardo’s book, The Lucifer Effect, gets its title from the metamorphosis of Lucifer into Satan. Though the Christian Scriptures do not make this claim, according to Christian legend, Lucifer was once God’s favorite angel until he challenged God’s authority and was cast into Hell with all the other fallen angels. Thus, Zimbardo derives this title to explain how good people turn evil. Zimbardo’s main assumption on why good people do awful things is due to situational influences and power given from authority.

The Lucifer Effect was written in response to his findings in the Stanford Prison Experiment. Zimbardo believes that personality characteristics could play a role in how violent or submissive actions are manifested. In the book, Zimbardo says that humans cannot be defined as “good” or “evil” because we have the ability to act as both especially at the hand of the situation. According to Zimbardo, “Good people can be induced, seduced, and initiated into behaving in evil ways. They can also be led to act in irrational, stupid, self-destructive, antisocial, and mindless ways when they are immersed in ‘total situations’ that impact human nature in ways that challenge our sense of the stability and consistency of individual personality, of character, and of morality.”

He also notes that we as humans wish to believe in unchanging goodness of people and our power to resist situational and external pressures and temptations. In chapter 12, “Investigating Social Dynamics: Power, Conformity, and Obedience”, Zimbardo discusses that peer pressure, the desire to be ‘cool’, the fear of rejection, and simply being a part of a group are the focal points to acting preposterous to your character.

In The Journal of the American Medical Association, Zimbardo’s situational perspective received support from other social situational experiments that demonstrated the same idea and concept. Almost ten years prior to the Stanford Prison Experiment (1971), Stanley Milgram conducted research on obedient behavior in 1965 that embraced situational forces. Milgram had “teachers” that delivered mock electric shocks to the “learner” for every wrong answer that was given in a multiple choice test. The teachers however did not know that the electric shocks weren’t real but still continued to deliver them to the learner. At the end of the experiment, 65% of men ages 20–50 complied fully up to the very last voltage. In the same room as the teacher, there was a “confederate” that kept tabs on the teacher and if they were delivering the shocks to each wrong answer. In the beginning of the study, participants signed a waiver that clearly explained the ability to opt-out of the experiment and not deliver the shocks. But with the surprising result rate of teachers who did continue to shock the learners, there was a situational force. The situational force that influenced the teachers to continue was the voice of the confederate egging them on by phrases such as, “I advise you to continue with this experiment” or “I am telling you to continue delivering the shocks” and the one that caught most teachers was “You must continue with the shocks.” Although the teachers knew that they could leave the experiment at any point in time, they still continued when they felt uncomfortable because of the confederate’s voice demanding to proceed.

Both Milgram and Zimbardo’s experiment tested situational forces on an individual. Both results concluded that irrational behavior compared to one’s character is plausible for any human because we have both tendencies in our nature.

— Wikipedia on Philip Zimbardo

2014.06.23 Monday ACHK

長頸豹 3

尋找時間的定義 1.2

SICM, 3.2 | SICP, 2.2

這段改編自 2010 年 4 月 10 日的對話。



估不到,在大概 2006 年,我從一本電腦界的神作中,得到了靈感,開始對「時間定義」有一點理解。然後在今年(2010),再加上我在大學時代時,長期訓練得來的「語理分析」功力,我破解了,「時間」的大部分意思。





— Me@2014.06.03

2014.06.03 Tuesday (c) All rights reserved by ACHK

The Magic City


The second theme is concerned explicitly with technology. It is a law of life in the magic city that if you wish for anything you can have it. But with this law goes a special rule about machines. If anyone wishes for a piece of machinery, he is compelled to keep it and go on using it for the rest of his life.

– Disturbing the Universe, p.4




2009.12.21 Monday ACHK

Dear Esther, 4

cease to exist

~ cannot be found in the original region,

but is still possible to be found in the meta-region

For example, at the end of the video game Dear Esther, the character dies, computer screen turns black, you cease to exist there,

but you wake up and continue to exist outside that video game, outside that computer screen.  

— Me@2012.10.27

2014.06.01 Sunday (c) All rights reserved by ACHK


This is a file from the Wikimedia Commons.
This is a file from the Wikimedia Commons.

Oracle VM VirtualBox (formerly Sun VirtualBox, Sun xVM VirtualBox and innotek VirtualBox) is a virtualization software package for x86 and AMD64/Intel64-based computers from Oracle Corporation as part of its family of virtualization products. It was created by innotek GmbH, purchased in 2008 by Sun Microsystems, and now developed by Oracle. It is installed on an existing host operating system as an application; this host application allows additional guest operating systems, each known as a Guest OS, to be loaded and run, each with its own virtual environment.

— Wikipedia on VirtualBox

2014.05.06 Tuesday ACHK

回到過去 3

Cumulative concept of time 20







— Me@2014-04-24 01:56:35 AM

2014.04.27 Sunday (c) All rights reserved by ACHK

A writer reading books

chris_mahan 24 minutes ago | link

I don’t watch TV (at all) and I game maybe 4 hours a week, usually in 2 sittings.

(I will occasionally watch a DVD, but maybe 2 hours a month, max.)

When people give me grief that I play the games, I tell them I’m a software developer: it’s like a writer reading books.

— Hacker News

2014.04.20 Sunday ACHK


openSUSE is a general purpose operating system built on top of the Linux kernel, developed by the community-supported openSUSE Project and sponsored by SUSE and a number of other companies. After Novell acquired SUSE Linux in January 2004, Novell decided to release the SUSE Linux Professional product as a 100% open source project. In 2011 The Attachmate Group acquired Novell and split Novell and SUSE into two autonomous subsidiary companies. SUSE offers products and services around SUSE Linux Enterprise — their commercial offering that is based on openSUSE Linux.

— Wikipedia on openSUSE

2014.04.13 Sunday ACHK

Powers of Ten

The Powers of Ten films are two short American documentary films written and directed by Charles and Ray Eames. Both works depict the relative scale of the Universe according to an order of magnitude (or logarithmic scale) based on a factor of ten, first expanding out from the Earth until the entire universe is surveyed, then reducing inward until a single atom and its quarks are observed.

Related films

Cosmic Voyage (1996), a loose remake of Powers of Ten for the National Air and Space Museum of the Smithsonian Institution.

— Wikipedia on Powers of Ten

2014.03.22 Saturday ACHK

L.A. Noire

The case that makes you and the case that breaks you…

The one you never solve, the one that keeps you awake at night.

The case that gnaws at your guts and ruins your marriage.

The case that keeps you propping up a bar as you relive the what-ifs, the might-have-beens, the half-leads and half-truths.

The case that other cops murmur about whenever you walk past.

The case you never… ever… discuss.

— Herschel Biggs

— L.A. Noire

— Me@2014-03-17 05:27:25 PM

2014.03.19 Wednesday ACHK

Antichamber, 3


In Antichamber, the player controls the unnamed protagonist from a first-person perspective as they wander through non-Euclidean levels. Regarding typical notions of Euclidean space, Bruce has stated that “breaking down all those expectations and then remaking them is essentially the core mechanic of the game”.

— Wikipedia on Antichamber

2014.03.15 Saturday ACHK


The good part is that the game is a genre in itself. There are no similar games in this world.

The bad part is that a few levels, such as “Falling Forward” and “Laying the Foundation”, do not make any sense. They exist just for wasting the players’ time.

Whenever you get stuck, don’t try harder. Just consult a walkthrough.

— Me@2014-03-09 08:58:45 AM

2014.03.10 Monday (c) All rights reserved by ACHK