Liquid metal imbalance of the surface tension induces a pressure difference between the rear and the head, which produces a thrust to drive the droplet toward the head; at the same time, the hydrogen produced in the electrochemical reaction process also further raises the thrust. The discovery of this phenomenon laid the technical foundation for the development of intelligent motors, vascular robots, fluid pumping systems, flexible actuators and even more complex liquid metal robots. Liquid metal Liquid metal consists of alloys with very low melting points which form a eutectic that is liquid at room temperature. The standard metal used to be
European Commissioner for External Relations specific foreign policy philosophy which one could term “effective multilateralism”; and, thanks to its specific nature, the EU disposes of a wide range of foreign policy instruments which are particularly suited to respond to today's challenges. In his first Commission, President Barroso established a Group of Commissioners, chaired by him, and in charge of six external relations services. Prior to its abolition, there were four external relations posts; European Commissioner for External Relations The European Commissioner for External Relations was a member of the European Commission with responsibility over the Commissions external representation in the world and the European Union's