Browsing by Author "Khoo, Guan Seng"
Now showing 1 - 3 of 3
Results Per Page
Sort Options
- PublicationOpen AccessAbsorption characteristics of SI adatoms on the Si(100) and Si(110) surfaces(1994-09)
;Toh, C. P.Khoo, Guan SengWe have employed a semiempirical molecular orbital method and a modified form of the Stillinger-Weber potential to investigate the characteristics of adsorption and diffusion of Si adatoms on the Si(110) and Si(100) surfaces. Our results for Si(110) indicate that the diffusion of the Si adatom is ani-sotropic along a low-energy zigzag path directly above the surface atomic zigzag chain. The activation energy for the Si adatom to diffuse along this zigzag path on the Si ( l 10) surface is 0.054 eV, suggesting that the Si adatom is highly mobile on Si ( l 10). For the Si(100) surface. the activation energy is about 0.33 eV with the direction of easy diffusion being parallel and to the side of the dimer rows on the fully relaxed Si (100) 2Xl surface.308 85 - PublicationOpen AccessAn academic perspective of 21st century education in Singapore: a 'Submarine' vision(1999)Khoo, Guan Seng
144 210 - PublicationOpen AccessOn the development of an IT-enhanced environmental science module(1996-11)
; ; ;Khoo, Guan SengWong, Angela F. L.In this paper, we discuss our efforts in curriculum development of an environmental science module that will be conducted in a networked teaching and learning environment, complemented by laboratory sessions and field work. The aim of the curriculum is to promote collaborative and distributed learning of environmental science that emphasizes the acquisition of higher order thinking skills. Some aspects of the curriculum that will be highlighted include the contents of an interactive multimedia teaching system for self-paced learning, and scenario generators that allow the participants to experiment with hypothetical environmental situations.394 122