利用PIV方法测量半浮区液桥热毛细对流的速度场

利用PIV法对硅油液桥热毛细对流的定常速度场进行了实时测量。为了便于测量,液桥上桥端面采取了铜环中嵌透明材料的方法,从液桥的顶部进行观测。当液桥上下桥有温差时,热毛细对流出现;本实验对于不同上下桥的温差,对液桥横剖面内的速度场分别进行了测量,研究外加温差对于流场速度分布的影响;并且在液桥中取了几个典型横截面进行测量,以期对大Pr数液桥的定常速度场有比较全面的定量测量。此外,实验结果也可作为数值模拟计算结果的验证。     

Legal science as catalyzer of SETI science, engineering and operations

Law is the oldest social science; in this condition it has a protagonic role in the development of other sciences, engineering and operations, because it allows them to aim for the desired goal in order and in a frame of legal possibility.The search for extraterrestrial intelligence implies the will of establishing a further relation. Relationships imply law.The role of law is not only participative as in multidisciplinary programs, but also interdisciplinary in the sense of harmonizing the several legal frameworks of the diverse sciences.SETI protocols I and II show, since their first draft, the harmonizing role of law. They are appropriated guidelines for a code of ethics and a code of conduct.The refinement of the concepts must be continued to reach finally the legal principles that shall govern these activities. Principles must be established before the production of facts, because law as a science, does not conceive the lacunae. Moreover, space law has always anticipated the technical facts hierarchizing its scientific condition.