在这里我要澄清一下,我们并不认为我们的研究支持对某一种身材的歧视。我们的下一个问题是:我们能否在视觉上直接看到这种传染现象?体重的增加真的是从一个人身上传到另一个人身上吗?这就变得很复杂了,因为我们要考虑到这个网络的结构、关系之间的建筑构造,是随时都在变的。更何况,肥胖症并不是只有单一中心的流行病,没有肥胖流行病的“零号病人”──如果找到这个人,那么肥胖症就是从他那边传出来的。但相反,肥胖症的流行有多个中心,多个人都在同时做着同样的事情。我将向你们展示一段30秒钟的视频演示,是花了我和James五年的人生才做好的。同样的,每个圆点都是一个人。每条连线都代表着某种人际关系。我们现在就要让它动起来,在30年间对这个网络进行每天的切割。
The dot sizes are going to grow, you're going to see a sea of yellow take over. You're going to see people be born and die -- dots will appear and disappear -- ties will form and break, marriages and divorces, friendings and defriendings. A lot of complexity, a lot is happening just in this 30-year period that includes the obesity epidemic. And, by the end, you're going to see clusters of obese and non-obese individuals within the network. Now, when looked at this, it changed the way I see things, because this thing, this network that's changing across time, it has a memory, it moves, things flow within it, it has a kind of consistency -- people can die, but it doesn't die; it still persists -- and it has a kind of resilience that allows it to persist across time.
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