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 ...

The printers available on the ORNL Visitor Wireless Network are listed below. Configuring Your PC to Print via the ORNL Visitor Wireless Network Windows - you can ...

The composition of a variable structure model changes over time. New components are added as, for example, machinery is installed in a factory, organisms reproduce, or shells are fired from a cannon.

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 ...

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 ...

How does solar radiation affect the temperature of a roof surface and heat flow through the roof? This solar radiation control fact sheet focuses on low-slope roofs for commercial buildings. The ...

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 ...

DMC calculations were performed using the methods and algorithms of chapters 3 and 4. Core electrons were modelled by an accurate norm-conserving LDA pseudopotential, [58]. The guiding wave functions ...

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 ...