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The latest research from the labs of Penn scientists Paulo Arratia and Douglas Jerolmack was an answer to “a call for help,” says Arratia.
印度建成并调试世界第三大高超声速风洞
印度 建成并调试 世界第三大 高超声速风洞
2017/5/15
继中国和美国之后，印度建成世界第三大高超声速风洞。由印度空间研究组织ISRO建造的高超声速风洞近日在维克拉姆-萨拉巴伊航天中心VSSC启动并运行调试。该风洞以ISRO前主席萨什·德霍万Satish Dhawan命名，由印度自主设计和研发制造。该风洞实验装置将为印度航天航空运载系统的设计和研发提供必要的空气动力学科学试验数据。
Greenland ice cores show industrial record of acid rain, success of U.S. Clean Air Act
Greenland ice cores industrial record of acid rain success of U.S. Clean Air Act
2014/4/16
The National Science Foundation (NSF) is an independent federal agency that supports fundamental research and education across all fields of science and engineering. In fiscal year (FY) 2014, its budg...
Aerosols in the Atmosphere: From Mexico to Japan, Finland to Switzerland, the Same Everywhere（图）
Aerosols the Atmosphere Mexico to Japan Finland to Switzerland
2009/12/15
It's no secret that the emissions leaving a car tailpipe or factory smokestack affect climate and air quality.Until now, scientists have struggled to know where the organic molecules from these emissi...
2 March 2007，The dynamics that govern a hurricane's path and intensity are incredibly complex, and one of the least understood is eyewall replacement. In this process the wind speed drops initially wh...