© Center for Global Development. All Rights Reserved. * Based on the CGD book Millions Saved: Proven Successes in Global Health, by Ruth Levine and the What Works Working Group with Molly Kinder. This brief includes updates and information from additional cases. A second edition of Millions Saved is available through Jones and Bartlett Publishers at http://www.jbpub.com/catalog/0763746207. M ar...

Motivated by the terminal Wiener index‎, ‎we define the Ashwini index $mathcal{A}$ of trees as‎ begin{eqnarray*}‎ % ‎nonumber to remove numbering (before each equation)‎ ‎mathcal{A}(T) &=& sumlimits_{1leq i

Massive stars drive powerful, supersonic winds via the radiative momentum associated with the thermal UV emission from their photospheres. Shock phenomena are ubiquitous in these winds, heating them to millions, and sometimes tens of millions, of degrees. The emission line spectra from the shock-heated plasma provide powerful diagnostics of the winds’ physical conditions, which in turn provide ...

This paper is submitted to Invited Session: New Trends in Modular Robotics. Abstract— Taking the inevitability of micron-scale manufacturing as a starting point, we present claytronics, a modular robotics system designed to scale to millions of cooperating, sub-millimeter scale units. The goal is for the system to act as a coherent mass and thereby mimic, with high-fidelity and in 3dimensional ...