Greg L. Zacharias

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Measurements are made of manual control performance in the closed-loop task of nulling perceived self-rotation velocity about an earth-vertical axis. Self-velocity estimation is modeled as a function of the simultaneous presentation of vestibular and peripheral visual field motion cues. Based on measured low-frequency operator behavior in three visual field(More)
This study assessed the feasibility of developing a Situation Awareness Model for Pilot-in-the-Loop Evaluation (SAMPLE) and a model-based metric for evaluating subsystems and tactics in enhancing pilot SA during the course of an air superiority mission. The study was directed at defining an overall architecture and implementing a software prototype to(More)
The development of an intelligent tutoring system for helicopter flight training is described. The Intelligent Flight Trainer (IFT) is a simulator-based system designed to assist students in developing proficiency on a suite of initial entry rotary wing maneuvers. It encapsulates instructor pilot domain knowledge in an expert system shell that provides(More)
A key challenge in creating simulated human agents is to produce sufficiently realistic behavior. A critical component of such realism is the range of variations in behaviors exhibited by humans. These variations are due to a variety of factors, including varying levels of intelligence and skill, differences in cognitive and decision making styles,(More)
The human behavior modeling community has traditionally been divided into those addressing <i>individual behavior models</i>, and those addressing <i>organizational and team models</i>. And yet it is clear that these extremes do not reflect the complex reality of the mutually-constraining interactions between an individual and his/her organizational(More)
The objective of this research is to design and demonstrate an agent-based modeling and analysis tool for evaluating General Aviation (GA) pilot situation awareness under free flight air traffic management (ATM). A computational tool is developed to assess free flight's potential effect on GA operators, by combining an agent-based representation of the(More)
The application of M&amp;S simulation technologies to advanced analysis and training functions throughout the DoD has led to an increasing need for higher fidelity representations of human decision-making behavior than is currently available in most military simulation behavior engines. The appropriate path to meet this need is to incorporate cognitive(More)