Abstract With the proliferation of various geographic databases on the Internet, we have seen increasing needs for accessing them concurrently and remotely via the Web for high‐level decision making. In this paper, we present Middleware for Efficient Access to Databases through OpenGIS Wrappers (MEADOW), an object‐oriented middleware system we have developed to meet these needs. Current OpenGIS standard addresses many interoperability issues involved in such a global utilization of geographic databases. However, existing Simple Feature specification for CORBA (SFCORBA) implementations of OpenGIS proved to be insufficient for MEADOW. The main problems are the complexity of system development and maintenance, and the inefficiency of accessing remote data servers for processing region queries. We resolved the complexity problem by automatically generating a major portion of the application code, specifically wrappers on database servers and client library modules called transparent access providers. A MEADOW view definition language was developed as a high‐level specification language for this purpose. The efficiency problem was resolved by using a region‐based group prefetching of spatial objects from a geographic region. In addition, we implemented an OID‐based semijoin for efficient global query processing, and a region‐level locking to enhance the level of concurrency among region queries. Copyright © 2002 John Wiley & Sons, Ltd

The basic ideas for realistic and real-time animation of 3D character are described through three steps. First, we just choose two deformations among all kinds of deformations that happen in the human body, because these deformations are globally noticed and can be performed in real-time. Second, we decide what body parts of a character are deformed from the anthropometrics data. Last, we propose simple and fast implementations for two deformations. Using proposed ideas, the authoring tool that make a deformable character from a rigid polygon model and test deformation of it, is introduced. And the animation player to animate a deformable character generated from the authoring tool is also introduced.

With the proliferation of various geographic database servers on the Internet, the need to access them simultaneously through the Web arises frequently for high-level decision making. The ongoing OpenGIS standard addresses many of the interoperability issues to make such global utilization of geographic databases possible. Based on the OpenGIS standard, the paper presents an object oriented architecture for the efficient Web based access to multiple geographic databases on the Internet. Called MEADOW, it provides a pair of automatically generated modules: the OpenGIS wrapper on the server side and the matching transparent access provider (TAP) on the client side. In cooperation with the wrapper, TAP supports an application's efficient access to the databases through prefetching and caching of remote objects.

We applied a machine vision technique to the assembly line of automobile. The volume of a car is very large. The overall machine vision environment is poor. The position and orientation of target is changed continuously. There are so many unexpected cases happening in inspection. Our system overcame the various poor conditions and achieved 99% of accuracy in the assembly line, using adaptive feature extraction method.

Xmas is an extensible main-memory storage system for high-performance embedded database applications. Xmas not only provides the core functionality of DBMS, such as data persistence, crash recovery, and concurrency control, but also pursues an extensible architecture to meet the requirements from various application areas. One crucial aspect of such extensibility is that an application developer can compose application-specific, high-level operations with a basic set of operations provided by the system. Called composite actions in Xmas, these operations are processed by a customized Xmas server with minimum interaction with application processes, thus improving the overall performance. This paper first presents the architecture and functionality of Xmas, and then demonstrates a simulation of mobile communication service.