ETH Zürich, CH-8092 Zürich, Switzerland.
Sci Rep. 2013;3:1167. doi: 10.1038/srep01167. Epub 2013 Jan 30.
We introduce a network-based index analyzing excess scientific production and consumption to perform a comprehensive global analysis of scholarly knowledge production and diffusion on the level of continents, countries, and cities. Compared to measures of scientific production and consumption such as number of publications or citation rates, our network-based citation analysis offers a more differentiated picture of the 'ecosystem of science'. Quantifying knowledge flows between 2000 and 2009, we identify global sources and sinks of knowledge production. Our knowledge flow index reveals, where ideas are born and consumed, thereby defining a global 'scientific food web'. While Asia is quickly catching up in terms of publications and citation rates, we find that its dependence on knowledge consumption has further increased.
我们引入了一种基于网络的指标，分析科研产出和消耗的过剩情况，以便对全球范围内的学术知识生产和传播进行全面分析，涵盖大洲、国家和城市等不同层面。与出版物数量或引用率等衡量科研产出和消耗的传统指标相比，我们基于网络的引文分析能够更全面地描绘“科学生态系统”的状况。通过量化 2000 年至 2009 年期间的知识流动情况，我们确定了全球科研知识生产的源地和汇点。我们的知识流动指数揭示了思想的诞生和消费地，从而定义了一个全球性的“科学食物链”。尽管亚洲在出版物数量和引用率方面的发展速度很快，但我们发现其对知识消费的依赖程度进一步增加。
