Won K. Hwam

Conversion the time dependent grid data of NetCDF to SEDRIS transmittal format

Distributed Interactive Simulation of Modeling and Simulation in the field of national defense has a problem of interoperability among heterogeneous simulators. The problem is caused of simulators are limited due to environmental, and it is obstacle to interchange the data. Therefore, intermediate standard data format was required to interchange environmental data to solve the problem. SEDRIS were intent to be developed the standard intermediate format. SEDRIS provide a standard interchange mechanism to distribute environmental data and promotes reusability of the data. SEDRIS are broad enough to represent all environmental things, but also complicated to use for constructing environmental structure. Interchange via SEDRIS require converters between SEDRIS transmittal format(STF) and others. This study addresses converting and verifying process from NetCDF, which has time-dependent grid environmental structure to STF. In addition, this study suggests efficient DRM structure for time-dependent grid environmental data.

A Study on Implementation of Monitoring System of Distributed Simulation for Underwater Warfare

ABSTRACTThis paper presents design and implementation of the monitoring system for the distributed simulation of underwater warfare. As importance of defense modeling and simulation(M&S) has raised, Simulation-Based Acquisition(SBA) was authorized for an obligatory process in the development process of weapon systems. Yet, it requires tremendous resources to develop a large-scale simulation system that describes complex and broad battlefields. Therefore, an approach of the distributed system was devised to develop a new simulation system combining legacy simulators that were developed for confined purpose and sole operations. High-Level Architecture (HLA) of distributed systems is a standardized protocol by IEEE for the distributed simulation system and Run-Time Infrastructure(RTI) is an implementation of HLA to structure efficient distributed systems. The main objective of this paper is to derive appropriate monitoring factors for underwater warfare simulation, design and implementation of the monitoring system to analyze the factors based on HLA/RTI.

A Simulation Framework of Multi-Agent Based Small Engagement Using Cougaar Architecture

M&S in the field of national defense is a battle system has been highly spotlighted for obtaining weapon systems, analyzing and experimentation of battle effects to reduce costs, time, and risks. It is classified as Campaign, Mission, Engagement, and Engineering levels by detail of description. In engagements, many situations on the battle field which are really unpredictable are required to be considered on the view of diverse tactics. Thus, engagement simulation is in demand to use for forecasting real-world battle situations by inserting various components which consists of real engaging situations into virtual local battle field. While developing the engagement simulation, adopting the concept of agent-based simulation gives it benefits which are improved autonomy, composability, and reusability of entities. It means reducing the time, cost and effort to develop the simulations. This paper concentrates on the framework of multi-agent based engagement simulation using Cougaar Architecture.

Dental Impression Measurement Based on an Adaptive Measuring Process Plan

Received 16 January, 2013; received in revised form 15 April, 2013; accepted 8 May, 2013ABSTRACTPresented in this paper is an adaptive measuring procedure of dental impression using the Struc-tured Light System. While measuring a complex object, such as dental impression, in thereverse engineering, it is not possible to acquire all parts of the scanned surface. Missingscanned data is resulted in holes in a created triangular mesh. The focus of this paper is tointroduce an algorithm for automatic identification of additional scanning orientations to fillholes that are created by a default scan. The proposed algorithm was developed by the threemajor technological requirements: camera visibility, projector visibility, data reliability. In orderto satisfy the requirements, the proposed algorithm determines additional scanning orientationfrom the orientation of a projection plane derived from the average normal vector of boundarytriangles. Key Words:Dental Impression, Structured light system, Scanning Orientation, Visibility, Trian-gular mesh

A Study on Agent based Simulation System Architecture for the Engagement of Ground Weapon Systems

Presented in this paper is a study for construction of a simulation system for the engagement of ground weapon systems. This paper proposes architecture for the simulation system based on agent simulation design methodology. Every entity of the proposed architecture is developed by assembling modularized agent components, and it enhances the reusability and composability of the entity. Consequently, time, costs, and efforts that are required to develop a new simulation system is able to be reduced by the enhancement. In the case of ground engagement simulation, it is very important to reflect environmental effects. Synthetic battlefield of the proposed architecture has environmental data of the battlefield and interacts with entities in the simulation system. The proposed architecture based simulation system can build swiftly various simulation models by the objectives and derive reasonable results from behaviors of entities that include environmental effects. This paper contains the construction of an example system based on the proposed architecture to verify the advantages of the architecture.

A Methodology for Creating a Simulation Model for a Agent Based and Object-oriented Logistics Support System

ABSTRACTProposed in the paper is an agent based and object-oriented methodology to create a virtual logistics support system model. The proposed virtual logistics support system model consists of three types of objects: the logistics force agent model(static model), the military supplies transport manager model(function model), the military supplies state manager model(dynamic model). A logistic force agent model consists of two agent: main function agent and function agent. To improve the reusability and composability of a logistics force agent model, the function agent is designed to adapt to different logistics force agent configuration. A military supplies transport manager is agent that get information about supply route, make decisions based on decision variables, which are maintained by the military supplies state manager, and transport military supplies. A military supplies state manager is requested military supplies from logistics force agent , provide decision variables such as the capacity, order of priority. For the implementation of the proposed virtual logistics force agent model, this paper employs Discrete Event Systems Specification(DEVS) formalism.