Charles S. Han

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Many computational tools for the simulation and design of emergency evacuation and egress are now available. However, due to the scarcity of human and social behavioral data, these computational tools rely on assumptions that have been found inconsistent or unrealistic. This paper presents a multi-agent based framework for simulating human and social(More)
Safe egress is one of the key design issues identified by facility planners, manager and inspectors. Computational tools are now available for the simulation and design of emergency evacuation and egress. However, these tools rely heavily on assumptions about individual human and social behaviors, which have been found to be oversimplified, inconsistent and(More)
There exist a wide variety of computational tools for the simulation and design of exits. However, due to the scarcity of behavioral data, these tools rely heavily on the assumptions about human individual and social behaviors. Many of these assumptions have been found inconsistent or incorrect. This paper presents a multi-agent based framework for studying(More)
We describe an algorithm based on motion-planning techniques to determine the existence of an accessible route through a facility for a wheeled mobility device. The algorithm is based on LaValle's work on rapidly exploring random trees and is enhanced to take into consideration the particularities of the accessible route domain. Specifically, the algorithm(More)
Accessibility regulations are federally enacted by the Americans with Disabilities Act (ADA). Design of buildings and facilities must comply with the guidelines developed by the authors of ADA. This paper discusses a hybrid approach using encoding prescriptive-based provisions and supplementing them with performance-based methods to support compliance and(More)
This paper introduces a large-scale engineering systems distributed object framework that serves as the connecting infrastructure between individual engineering tools and analysis components. The framework can incorporate software services as well as hardware solutions. Implemented software services include motion planning simulations and animation(More)
Computer-aided design (CAD) applications have been widely used in the architecture, engineering and construction (AEC) industry to aid architectural design, to visualize the physical appearance of a building, and to specify design details for building construction and operations. As web technology continues to grow rapidly and the Internet becomes(More)