Some Key Issues in Hypersonic Propulsion

Electron Air Hypersonic Propulsion

Aviation, in general, and aerospace in particular needs new propulsion systems which allow the craft to reach high speeds by cheaper and more efficient methods. Author offers a new propulsion system using electrons for acceleration of the craft and having a high efficiency. As this system does not heat the air, it does not have the heating limitations of conventional air ramjet hypersonic engin...

Propulsion Systems for Hypersonic Flight

Planning Under Uncertainty: Some Key Issues

A planner in the real world must be able to handle uncertainty. It must be able to reason about the eeect of uncertainty on its plans, select plans that avoid uncertain outcomes when possible, and make contingency plans against diierent possible outcomes when uncertainty cannot be avoided. We have constructed such a planner, Cassandra, which has these properties. Using Cassandra, we have produc...

Some Key Issues Confronting Inflationary Cosmology

Does inflation provide a compelling explanation for why the universe is so large, so flat, and so old, and a predictive theory of density perturbations? In this brief contribution (based on the role of the author as moderator of the discussion session on inflation), a list of some of the key issues confronting inflationary cosmology will be given, with the hope of focusing the debate on inflati...

Evolution of Mitigation Commitments: Some Key Issues

development of analytical papers for the purpose of providing useful and timely input to the climate change negotiations. These papers may also be useful to national policy makers and other decision-makers. In a collaborative effort, authors work with the Annex I Expert Group to develop these papers. However, the papers do not necessarily represent the views of the OECD or the IEA, nor are they...