It is a great pleasure to welcome all participants to this workshop. We are especially happy to have many visitors from other Asia Pacific countries and the United States.In the November 2011 ranking of the world’s most powerful supercomputers,four out of the top five most powerful systems were built in Japan or China.Three of these five systems boast GPU accelerators. It is an opportune time to analyze the current state-of- the-art accelerated HPC architectures from an Asian perspective and experience, including practical issues of use, code development,and performance, as well as the advantages and limitations of accelerated HPC systems.With support from the United States National Science Foundation (NSF) and in cooperation with the HPC Special Interest Group (HPC SIG) of the Association for Computing Machinery (ACM), the Asian Technology Information Program (ATIP)and the Agency for Science, Technology and Research (A*STAR) Computational Resource Centre (A*CRC), this workshop in Singapore focus on the practical aspects of scientific and engineering applications, experiences with program development, porting, tuning, performance optimization, efficiency, hardware utilization, time to solution, and the outlook for near-future trends and prospects for accelerated HPC. We believe it will be a very fulfilling two days with the presentations covering awide spectrum of the accelerated HPC practice. Some tutorial sessions arrangedby vendors will be conducted on the third and fourth day.Additionally, we have arranged for site visits to some of Singapore’s premier research labs and HPC centre in the universities. We hope this will provide a goodopportunity, especially for our foreign visitors, to learn about some of the research work conducted locally and explore potential collaborations.We believe everyone will have a fruitful workshop and we thank you for participating.