A thriving manufacturing sector is vital to the nation’s economic health and global security, yet few companies possess the research and development (R&D) capacity essential to staying competitive.

The twentieth century has been shaped by sweeping changes in communication technology. The latest development to radically transform the communication landscape has been the widespread adoption of ...

and equations 2.29 and 2.30. A self-consistent solution is required due to the dependence of on . The above equations provide a theoretically exact method for finding the ground state energy of an ...

Richard J. Norby Environmental Sciences Division Oak Ridge National Laboratory One Bethel Valley Road Bldg. 4500-N, MS-6301 Oak Ridge TN 37831-6301 Phone: (865) 576-5261 rjn@ornl.gov Complete CV ...

Methane hydrates, a promising natural gas resource, are believed to reside throughout the globe in sea-floor sediments and permafrost. Lorie Langley, who is leading ORNL’s Gas Hydrate program for the ...

The building envelope―the materials that separate the indoor and outdoor environments―primarily determines the amount of energy required to heat, cool, and ventilate a building. The envelope also can ...

Inaugurated in 1979, the "Buildings Conference" takes place every three years allowing time to develop new research and technology applications and to document the findings. Attendance is ...

Research is focused on predicting and explaining the properties of materials using computer simulation. Over the last two decades, advances in simulation techniques coupled with increasing computer ...

This derivation shares many formal similarities with that given for the variational principle in section 3.3.1. However in the DMC method the imaginary time evolution results in excited states ...

The quasiparticle excitation energies are the energies for adding an electron to the system or subtracting one from it. A quasiparticle energy has both real and imaginary parts, the latter giving the ...