漏了格致?

by 孙尉翔 on 12月 25, 2007

今天还要赶着去做DSC,看到Yan的回复,赶紧打几个字……

我在Nature Network上的一篇文章介绍了在中国写博客的教授们,主要是在科学网上的那些,还有个别在其他地方开博的。Yan回复提醒我还有gezhi.org,我的确忘了提这个。在中国,写博客的研究生群体应该以gezhi.org为代表了。如果gezhi.org上写博的教授多一点就好了。

科学网的系统实在不感恭维。格致的系统显然成熟很多,但是我还是不想离开科学网。科学网的宝贵之处就在于它有一群由教授组成的社区,科学由他们口中说出,和由学生口中说出是不一样的。其次是在格致里博客的独立性太不突出,更像个有个人文集功能的论坛。

我还有写关于个人生活的博客,我不喜欢把这个博客放在一个社区化很严重的BSP上。我一直在Blogger.com写,现在转到了yo2.cn。但是科学博客就相反,很需要一个社区的存在,在中国通过论坛来建设社区也许是个好方法,但是它只能吸引目前的“网友”。而实际上,科学家们原本就上网“灌水”的很少,在中国可能更少。通过像科学网这样由“上面”主办的方式,也许能够把原来不习惯在网上灌水的科学家们拉到网上来。这是一个很好的方法。在国外,则要靠Nature这样的“德高望重”的出版商来牵头,其实道理是差不多的。

On the New Members of the Solar Family

by 孙尉翔 on 8月 24, 2006

Free Image Hosting at www.ImageShack.usThe world’s astronomers, under the auspices of the International Astronomical Union (IAU), have concluded two years of work defining the lower end of the planet scale – what defines the difference between “planets” and “solar system bodies”. If the definition is approved by the astronomers gathered 14-25 August 2006 at the IAU General Assembly in Prague, our Solar System will consist of 12 planets: Mercury, Venus, Earth, Mars, Ceres, Jupiter, Saturn, Uranus, Neptune, Pluto, Charon and 2003 UB313. The three new proposed planets are Ceres, Charon (Pluto’s companion) and 2003 UB313. There is no change in the planetary status of Pluto, whom the New York Times essay described as ‘dodged a bullet’ this time.

Adaptive liquid microlenses activated by stimuli-responsive hydrogels

by 孙尉翔 on 8月 19, 2006

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In the application where infinitely-variable lens without any moving parts is needed, liquid lenses are not a new thing to implement. Conventional liquid lenses use two immiscible fluids, each with a different refractive index, to create variable-focus lenses of high optical quality as small as 10 µm (microns). There are two ways to manipulate the two fluids, electrically and mechanically, but both methods take advantage of the surface tension of the liquid. The electric method uses a novel property called electrowetting (full review on electrowetting: J. Phys.: Condens. Matter, 2005, 17, R705-R774) to modify the surface tension, while the mechanical method takes advantage of surface tension to physically change the shape of the lens (more details of liquid lenses introduced by Alix Paultre).
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