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Daniel Guggenheim School of Aerospace Engineering
Daniel Guggenheim School of Aerospace Engineering
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ItemAbstraction and Modeling Hypothesis for Future Transportation Architectures(Georgia Institute of Technology, 2003-07) DeLaurentis, Daniel A. ; Lewe, Jung-Ho ; Schrage, Daniel P.The goal of a future transportation architecture is an expansion in mobility, enabling new types of travel and commerce currently not affordable and thus producing induced societal benefit. From the design perspective, the complexity, high dimensionality and diverse nature of the design space make study of such architectures extremely difficult. An abstraction framework and modeling hypothesis are proposed, steps vital to the proper start of such an aggressive challenge. The core entities within a transportation architecture are abstracted: stakeholders (consumers, regulators, service providers, etc.), resources (vehicles, infrastructure, etc.) and networks (both explicit for resources and implicit for stakeholders). This abstraction leads to a general description for transportation that is useful from a conceptual modeling point of view stakeholders employ particular resources, organized in networks, in order to achieve mobility objectives. The modeling hypothesis is created stemming from the description and focused upon the need to examine the architecture from a system-of-systems perspective, under the belief that the organization of transportation resources is just as important as the nature and performance of those resources. Subsets of the methodologies are tested on three exploratory research thrusts and the findings are used to project a future path towards full validation of the modeling hypothesis. Ultimately, decision-makers at multiple levels can use the methodologies to quickly understand and visualize the relative merits of alternative architectures.
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ItemAn Integrated Decision-making Method to Identify Design Requirements Through Agent-based Simulation for Personal Air Vehicle System(Georgia Institute of Technology, 2002-10) Lewe, Jung-Ho ; Ahn, Byung-Ho ; DeLaurentis, Daniel A. ; Mavris, Dimitri N. ; Schrage, Daniel P.A product?s design requirements guide the next development efforts. Thus, correct decision-making is critical in generating design requirements as vehicle concepts are being formulated. A new method is proposed to account for system-of-systems aspects and to aid a decision-making process in synthesizing design requirements for a personal air vehicle system. The use of an agent-based modeling technique facilitates the abstraction of the key elements in the whole system. A traveling party is treated as an agent, and the infrastructure environment in the national transportation system is easily represented in the model. A number of simulations are performed to demonstrate the capability of this new approach. The method not only measures the effect of design requirements of a personal air vehicle system through sensitivity analyses, but also evaluates the effect of system technologies quantitatively, while maintaining the system-of-systems perspective. With this powerful method, designers can extract essential technical requirements that allow polishing of concept vehicles; policy makers can investigate the infrastructure and technology impact of new systems; and business planners can perform an analysis based on their own market assumptions.
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ItemSystem-of-Systems Modeling for Personal Air Vehicles(Georgia Institute of Technology, 2002-09) DeLaurentis, Daniel A. ; Lim, Choon Giap ; Kang, Taewoo ; Mavris, Dimitri N. ; Schrage, Daniel P.On-going research is described in this paper concerning the development of a methodology for adaptable system studies of future transportation solutions based upon personal air vehicles. Two challenges in this research are presented. The challenge of deriving requirements for revolutionary transportation concepts is a difficult one, due to the fact that future transportation system infrastructure and market economics are inter-related (and uncertain) parts of the equation. Thus, there is a need for a macroscopic transportation model, and such a task is well suited for the field of techniques known as system dynamics. The determination and visualization of the benefits of proposed personal air vehicle concepts for individuals presents a second challenge. In this paper, the primary benefit metrics that serve as system requirements for personal transportation applications are the Doorstep-to-Destination travel time-savings and net present value of utilizing the new transportation option as compared to a conventional transportation mode. The modeling and determination of these metrics, the synthesis of vehicle characteristics, as well as existing travel statistical data are integrated into the system model to enable visualization of the design space and to guide the design space evolution through sensitivity assessment. This individual traveler-based analysis is referred to as a microscopic model, and interesting results from its execution are reported. The results indicate the level and direction of technology progress required to create economically viable personal air transportation architectures.
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ItemCapturing Corporate Philosophy: The Future of IT(Georgia Institute of Technology, 2000-02) Hale, Mark A. ; Daberkow, Debora Daniela ; DeLaurentis, Daniel A. ; Mavris, Dimitri N. ; Schrage, Daniel P. ; Craig, James I.Context is proposed as a mechanism for organizing Information Technology practices in the future through its role in interpretation. An enterprise organization model based on decision-flow is presented here that is applicable to a variety of domains. It contains elements that mark the information content with respect to a full consideration of its environment. These elements are, in order of increasing superiority, data, information, knowledge, judgement, and philosophy. There are four marked stages where contextual derivation occurs among these elements, including definition, refinement, improvement, and realization. Discovery occurs during the derivation of context and it is at this time that higher-level processes influence subordinate processes. For this reason, it is believed that corporate philosophy can be infused explicitly throughout enterprise practices. The resulting organizational model can be used by an enterprise to strategically allocate resources and maintain competitive advantage.