The convergence of the web and TV has already begun. Connecting TV with the web offers tremendous opportunities for commerce, entertainment, and social networking. However, web applications are too heavy for legacy IPTV set-top boxes (STBs) since legacy STBs have low computing power and small memory. In this paper, we propose web application virtualization for legacy STBs. In this architecture, web applications are running remotely on the cloud platform, and the visual output is streamed to the STBs. We present the virtualization architecture and issues for future developments.

Conventional object-relational database management system (ORDBMS) vendors provide extension mechanisms for adding user-defined types and functions to their own DBMSs. Here, the extension mechanisms are implemented using a high-level (typically, SQL-level) interface. We call this mechanism loose-coupling . The advantage of loose-coupling is that it is easy to implement. However, it is not preferable for implementing new data types and operations in large databases when high performance is required. We have earlier proposed the tight-coupling architecture (Whang et al. 2002 , 2005 ) to satisfy this requirement. In tight-coupling , new data types and operations are integrated into the core of the DBMS engine in the extensible type layer . Thus, they are supported in a consistent manner with high performance. This tight-coupling architecture is being used to incorporate information retrieval features and spatial database features into the Odysseus ORDBMS that has been under development at KAIST/AITrc for 19 years. In this paper, we introduce the tightly-coupled spatial database features of Odysseus/OpenGIS. By taking advantage of tight-coupling, Odysseus/OpenGIS provides excellent performance in processing spatial queries as well as flexible concurrency control and recovery on spatial data. We show the performance through extensive experiments. Finally, we present sample applications of a geographical information system (GIS) implemented using Odysseus/OpenGIS.

We have earlier proposed the tight-coupling architecture for adding new data types into the DBMS engine. In this paper, we introduce the Odysseus ORDBMS and present its tightly-coupled spatial database features. We demonstrate a geographical information system(GIS) implemented using Odysseus.

In this paper, the new type biped walking robot which is composed of a minimum number of links just for walking and its appropriate gaits are experimented. The proposed new gaits for this robot are: the four-crossing, crawling, standing and turning gaits. Dynamically stable walking of the biped robot is implemented by satisfying the stability condition of the zero moment point.