Chlorine adsorption on the Cu(111) surface

We investigate the adsorption of chlorine on the Cu(111) surface with full potential all-electron density functional calculations. Chlorine adsorption at the fcc hollow sites is slightly preferred over that at the hcp hollow. The adsorption geometry is in excellent agreement with electron diffraction and ion scattering data. Adsorption energies and surface diffusion barriers are close to those deduced from experiment.Comment: to appear in Chem. Phys. Let

XXXX (XXXX) 'Synchronous collaborative systems for distributed virtual environments in Java

Abstract: This paper presents a 3D-distributed virtual environment, which allows for the creation of applications to enable multiple users to collaboratively interact in, and communicate about, a virtual world. This virtual environment is used to primarily support a flight simulator application by providing communications routines and networking synchronisation between the client and the server. Four server-client synchronisation methods were developed and compared. The method of transparent synchronisation with non-blocking I/O has been found to be the best method for maintaining synchronisation among distributed virtual environments using Java. The successful creation of the distributed virtual environment and the positive results collected in the supporting experimental data, leads to the conclusion that Java, with the addition of the non-blocking I/O Java.NIO.channels API and the Java 3D API, can be successfully used to create high-performance distributed 3D-virtual environments