In his original work Josephson [Phys. Lett. 1, 251 (1962)] predicted that a phase-dependent conductance should be present in superconductor tunnel junctions. This effect attracted considerable attention in the past but is difficult to detect, mainly because it is hard to single it out from the background pair current. Here, we propose to isolate it …
Global warming is irreversible without massive geoengineering of the atmosphere’s chemistry. This stark warning comes from the draft summary of the latest climate assessment by the Intergovernmental Panel on Climate Change. Even if all the world ran on carbon-free energy and deforestation ceased, the only way of lowering temperatures would be to devise a scheme …
Many futurists and forecasters project that 3D printing will become dominant in manufacturing. Yet additive manufacturing is more than 2000 times smaller than the overall manufacturing industry. Overall 2D desktop printing sales have been falling since 2010. Here is an analysis of relative market sizes and the likely impact of 3D printing out to 2025. …