秋天的枫叶   In the language of science, an equinox is either of two points on the celestial sphere where the ecliptic and the celestial equator intersect. For the rest of us, it’s one of two times a year when the sun crosses the equator, and the day and night are of equal length. At the autumnal equinox (Sept. 22, 2005, 6:23 P.M. EDT), the sun appears to cross the celestial equator, from north to south; this marks the beginning of autumn in the Northern Hemisphere. The vernal equinox, also known as “the first point of Aries,” is the point at...

问了很久很久这个最基本的问题: 到底Differential Geometry和Screw Theory有没有直接的关系?结果… 发现到2001年有两个丹麦人(Stramigioli和Bruyninckx)大胆的把它们连起来了.研究了那么久, 说自己要往Differential Geometry的方向走, 走了半天还是喜欢用Screw Theory. 看到这张paper, 觉得自己可以很安全的继续用Screw Theory, 然后在dissertation前面好好地有系统地连贯这两大communities, 然后继续用自己熟悉的Screw Theory解释应该研究的了. 有把"方向"转了一下, 不过还是值得的.想了半天, 还是不明白为什么Liu和Li不直接连贯这两个theory, 在他们的几张papers中都含糊地在这两门theories徘徊, 随便带过. 他们的papers都很好啊. 不管了, 就是这样了, 把这几个家伙的理论连贯起来, 一定可以做到自己要的.   Differential Geometry vs. Screw Theory<=> Lie Groups vs. Twists/Wrenches

丝路 by 梁静茹   如果流浪 是你的天赋 那么你 一定是我最美的追逐 如果爱情 是你的游牧 拥有过 是不是该满足 谁带我踏上孤独的丝路 追逐你的脚步 谁带我离开孤独的丝路 感受你的温度 我将眼泪流成天山上面的湖 让你疲倦时能够扎营停驻 强敌深湖玄武 为你笑为你哭 爱上你的全部 放弃我的全部 爱上了你之后 我开始领悟 陪你走了一段 最唯美的国度 爱上了你之后 我从来不哭 谁是谁的幸福 我从来不在乎 谁是谁的旅途 我只要你记住 星星就是 穷人的珍珠 你的笑 支撑着我虔诚的最初 狂风沙是 我单薄衣服 穿越过亚细亚的迷雾 云破日出 你是那道光束 带 着平凡的我 走过奇迹旅途

The Ophelia 祝福北卡的居民们…

% phd_armlab.m % % author: Chin Pei Tang % date: 09/09/05 % adapted from www.phdcomics.com archieve 09/09/05   load THESIS_TOPIC   while (funding == true)     data = run_simulation(THESIS_TOPIC);     GOOD_ENOUGH = query(Dr_Krovi);     if (data > GOOD_ENOUGH)         graduate();         break     else         THESIS_TOPIC = new();         years_in_gradschool += 1;     end end  

The Arrow and The Songby Henry Wadsworth Longfellow I shot an arrow into the air,It fell to earth, I knew not where;For, so swiftly it flew, the sightCould not follow it in its flight. I breathed a song into the air,It fell to earth, I knew not where;For who has sight so keen and strong,That it can follow the flight of song? Long, long afterward, in an oakI found the arrow, still unbroke;And the song, from beginning to end,I found again in the heart of a friend.

World Trade Center under Attack on Sep 11, 2001   不知不觉, 911事件也过了4年. 那个黑暗的时候, 虽然身在7小时车程以外的地方, 还是能够深深感受到那股恐惧感的. 911时间不只打击了美国, 也打击到世界上每一个居民. 为在这个事件丧失性命的人和他们的亲人们深深地默哀…

The myth persists that prolific scholars are born, not made, but research suggests otherwise. Much is known about how to become more prolific-and any scholar can. These steps will show you how. Step 1. Write daily for 15 to 30 minutes. Many scholars believe that writing requires big blocks of time. They’re wrong. Research shows that scholars who write daily publish far more than those who write in big blocks of time. The problem with big blocks of time is that they’re hard to find. In contrast, when you write daily, you start writing immediately because you remember what you...

The Chapel… The Piano… and The Beautiful Voice…   于 Cornell University 2005年9月5日

Hurricane Katrina – New Orleans   "Cradled in a wide southern meander of the Mississippi River just north of the Gulf of Mexico, New Orleans is surrounded by Lake Pontchartrain to the north, Lake Borgne to the east, and lakes Cataouatche and Salvador to the south. This ring of freshwater is also surrounded by hundreds of square miles of wetlands and the Gulf of Mexico. To make matters worse, most of the city is below sea level."   "New Orleans was fast becoming the most important port in the nation—feeding commodities up the Mississippi to all of the Midwest and...