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October 31, 2009

Time travel through the brain

Filed under: Neuroscience, GGVV

This’ cool…Watch the time travel through the brain for the last 100 years

 

Drawing by Spanish Histologist, Herederos de Santiago Ramón y Cajal in 1899

October 29, 2009

The fittest career

Filed under: GGVV

根据网上一个职业测试,我的最适合职业是艺术家(97%), 作家(97%),个人服务(89%)和科学家(82%);最不适合做销售员(1%)。。。 是不是该改职业呢?

October 25, 2009

Predict future

Filed under: Neuroscience, Readings, GGVV

根据Jeff Hawkins的Memory-prediction framework理论, 大脑是个学习记忆的机器,外部信息一层一层达到高级中枢,并储存起来,高级中枢又向下一层一层作出预测信息,与新的外部信息比较,如果匹配,就会有相应的反射行为,如果不匹配就会被整合到更高一层的中枢储存起来。。。重复性的工作很容易形成匹配与巩固,而创造性的工作就要靠大脑建立新的匹配的效率了。。。我们大脑所反映的就是外部和内部的世界,所谓创造也就是所有信息片段在学习记忆的随机碰撞中形成的某种模式,这些模式一直存在,聪明的人由于处理信息快可能比常人有更多的机会预测到这一模式,从而发现发明新的东西。。。但对于这个世界可能没有什么新的东西,万物都是随机的存在。。。从你在路上看到一个熟人到挥手打招呼的时间大概是250毫秒,也就是四分之一秒,这个行为大脑动用了几百万的神经细胞,大概消耗几个卡路里,未来的大脑可能是生物-芯片合成脑的效率会更快,也就是1毫秒,而且所有人类已知信息都可以储存在芯片里,人类不需要主动记忆,只需学习模式分辨的能力,人类的进化会从基因的进化转移到材料的进化上。。。就像T101到T1000一样。。。可以预见谁发明最好的材料谁就掌握这个世界,而为争夺新材料的战争也会永无止境。。。

October 24, 2009

Understanding Magic

Filed under: Neuroscience, GGVV

 

芝加哥神经科学年会印象最深的演讲是两个顶级魔术师的表演,Apollo RobbinsEric Mead。。。神经科学家自从2005年邀请达赖喇嘛以后,一直在搞这种对话,试图用科学方法了解宗教家,建筑师,舞蹈家,发明家,魔术师的大脑是怎么运行的,以期找到新的研究切入点。。。魔术师在精彩表演之余阐述了他们各自的实践理论基础,称魔术是通过操控观众的记忆,注意,感知等神经行为来实现表演目的,催眠术也是其中的一种,只不过被精神医生用来做治疗而已。。。科学家目前的工作可能会帮助理解这种行为的生理机制,对魔术事业大概没有什么帮助。。。两位魔术师对魔术的未来也各抒己见, Robbins认为魔术的秘密被公布后,就是纯粹的艺术了(他以在表演之前告知被操纵者他将要达到的目的为特征),而Mead认为未来的表演更多是现场表演而不是现在流行的媒体表演(他以在现场操纵观众情绪著称)。。。魔术是一门学问,和科学一样。。。

sfn历年邀请的演讲者:

2009  Apollo Robbins, Eric Mead

2008  Mark Morris

2007  Jeff Hawkins

2006  Frank Gehry

2005  Dalai Lama

October 15, 2009

Magic woodoo cure

Filed under: Biology, GGVV

偶然看到这个网站,发现美国也盛产巫医,骗子,William Rader 居然用胚胎干细胞静脉注射治疗几乎所有现代医学尚无法治疗的疾病,包括唐氏综合征,即小儿痴呆。。。在东欧国家取自8周的胚胎的细胞(实际上已经不是胚胎干细胞了,不知来自哪一个器官),被运到德国增殖,然后运到多米尼加,中国,俄罗斯的诊所移植给病人。。。号称治愈了很多不治之症。。。看了他的宣传片发现病例介绍含糊其辞,而且淹没在强大的背景音乐之下。。。BBC对此也有报道。。。看看主页上的病例介绍:

Luca - Down’s Syndrome

Luca’s mother - “I was told by my pediatrician my son Luca had Down’s Syndrome and that their was nothing that could be done. After his stem cell treatment a miracle occurred, he eventually became completely normal in appearance and his I.Q. actually tested higher than average for his age”.

 

October 13, 2009

Poster for Chicago meeting

Filed under: Neuroscience, GGVV

花了两天时间完成了这个破斯特,展示我两年的工作成果。。。就那么一点点。。。

October 7, 2009

Early homind

Filed under: Biology, GGVV

 

After 15 years of research, the papers on the oldest known skeleton of a potential human ancestor, 4.4-million-year-old Ardipithecus ramidus from Aramis, Ethiopia was finally published on the new issue of Science. (Science 2009, 326, 5949)

一个生活在4.4百万年前东非丛林中的女子,身高120厘米,体重50公斤, 有着黑猩猩一样的体型和大脑,但是能直立行走。。。她也许是人类的祖先。。。比Lucy还要早。。。进化论又加了新的一页。。。

挖骨头真是个令人向往的工作啊!埃塞俄比亚真是个宝地啊!

October 4, 2009

Sink or swim

Filed under: Biology, Readings, GGVV

"Here the balance of “inductive inquiry” (I2) and “hypothesisdriven” (HD) approaches becomes the
crux.The I2 approach, in its most pure form, entails adventure into uncharted territories—neither guided nor bridled by hypothesis. The HD approach is built on scholarship and smarts and is fundamentally driven by theory. If X and Y facts are understood, this knowledge should facilitate the hypothesis essential for solving the unknown Z. Scientists, just like most people, are far more comfortable with the known than the unknown. If one can embark on an adventure with known variables in pocket, the comfort factor alone will nudge the endeavor in favor of the HD direction….Bottom line, conventional wisdom almost always prevails—this, I advise, is something you will have to constantly fight in order to carve out a truly innovative career in science….Any research endeavor we might choose to pursue is, of course, an I2/HD blend. As articulated by Charles Darwin,
“Let theory guide your observations,” otherwise one “might as well go into a gravel pit and count the pebbles and describe the colors….Does science feel like a job, or is it the case that vocation matches
avocation, such that you can’t wait to get to the lab, such that it does not feel like work at all? If so, nothing can stop you and may you indeed “stay, forever young.”"

 ___from Mcknight SL. Unconventional wisdom, Cell, 2009,138,817

October 3, 2009

Mid-Autumn

Filed under: Poems, GGVV

今天看了德国电影《意志的胜利》,感觉到电影宣传的力量。。。

浪子离家二十年,

乡音渺缈梦无边。

望破层云寻皓首,

年年此日泪涟涟。






















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