low pressure nuclear heat-transfer rocket
111High-temperature superconductivity — Unsolved problems in physics What causes superconductivity at temperatures above 50 kelvin? High temperature superconductors (abbreviated high Tc or HTS) are materials that have a superconducting transition temperature (Tc) above 30 K… …
112List of United States Navy ratings — From left to right: a Special Warfare Operator 1st Class and a Boatswain s Mate 2nd Class. United States Navy ratings are general occupations that consist of specific skills and abilities. Each naval rating has its own specialty badge, which is… …
113United States Air Force Research Laboratory — Infobox Military Unit unit name= Air Force Research Laboratory caption=Emblem of AFRL dates= October 1997–Present country= United States branch= Air Force type= Research and development size= 4,200 civilian 1,200 military command structure= Air… …
