Utilizes dispersed Xe lamp to excite fluorescence of solubilized or solid specimens. Two spectrometers (UV-VIS, and NIR) under computer control record fluorescence spectra. Excitation wavelength can ...

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 ...

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.

ORNL and Energy Systems honored their top achievers last month at Awards Night. Here are this year's ORNL winners. Energy Systems' winners were listed in the May 14 issue. Representing ORNL's "of the ...

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 ...

This document was prepared by the Oak Ridge National Laboratory (ORNL) as part of work sponsored by the United States Department of Energy (DOE) in carrying out their statutory authorities. Neither ...

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 ...

The principles of wavefunction optimisation are straightforward: optimise (vary) a number of free parameters in a wavefunction in order to improve it. The preferred objective function used for ...

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 ...

Jong Youl Choi is a researcher working in Scientific Data Group, Computer Science and Mathematics Division, Oak Ridge National Laboratory (ORNL), Oak Ridge, Tennessee, USA. He earned his Ph.D. degree ...