Daily Archives: June 6, 2013

Matrix string theory 3

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So one can show that all of physics of M-theory, if studied in the light-cone gauge, is equivalent to an ordinary non-gravitational matrix model – a quantum mechanical model with matrix degrees of freedom.

The eigenvalues of the X^i matrices may be viewed as the positions of the gravitons (or their superpartners) in 11 dimensions; a threshold (zero-binding-energy) bound state of several such eigenvalues (which can be proved to exist, a remarkable property of SU(N) supersymmetric quantum mechanics) are gravitons that carry a higher number of units of the quantized light-like (longitudinal) momentum.

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— Physics Stack Exchange
   
— answered Mar 6 ’11 at 8:02

— Lubos Motl

2013.06.06 Thursday ACHK

Consciousness 2

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So when we’re awake and conscious, a single shock initiates a series of responses. Because they are well-connected, the different parts of the cerebral cortex are able to communicate and the integration results in this being conscious.

But when we’re asleep and unconscious, the communication channels temporarily shut down. So the same shock produces only a short likewise response.

— The Secret You

— BBC Horizon Documentary

conscious

Etymology

From Latin conscius, itself from con– (a form of com– (“together”) + scire (“to know”).

— Wiktionary on conscious

Consciousness and self-awareness is due to the communications between different parts of the brain.

— Me@2013-06-06

2013.06.06 Thursday (c) All rights reserved by ACHK

恆心無用 1.8

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Allow no exceptions 2.8 | 活在當下 3.8

這段改編自 2010 年 7 月 8 日的對話。

所以，你要記住，恆心無用，毅力有害。你現在要追求的，是「學問」和「成績」，不是「恆心」和「毅力」。高考的成績表中，並不會有一欄「恆心」的分數。那你為什麼要追求「恆心」呢？

很多人都會不自覺地，追求「恆心」。背後的終極原因是，自我中心。「自我中心」在這裡的意思是，他們追求「主觀自我形象」，多過「客觀學問成績」。那是荒唐趣怪，庸人自擾。

— Me@2013.06.06

2013.06.06 Thursday (c) All rights reserved by ACHK