Usability has become an important issue for improving web design. However, specific studies on determining elements for geo-web usability are almost non-existent. Therefore, this paper describes our first approach to uncover the main elements of geo-web-usability. Three main elements have been identified as critical for usability; they are web content, human-computer interaction, and user satis...

A priori crystal structure prediction techniques have been used to explore the phase diagrams of hydrides ofmain group elements under pressure. Anumber of novel phases with the chemical formulas MHn, n > 1 and M = Li, Na, K, Rb, Cs; MHn, n > 2 and M= Mg, Ca, Sr, Ba; HnI with n > 1 and PH, PH2, PH3 have been predicted to be stable at pressures achievable in diamond anvil cells. The hydrogenic la...