Papers by Celestine Ntuen
Comparing pilot training perfomance in immersive and non-immersive virtual environments
Comparing Pilot Training Perfomance in Immersive and Non-Immersive Viirtual Environments
Proceedings of the Human Factors and Ergonomics Society ... Annual Meeting, Sep 1, 2004
This research investigated whether there was equal improvement for instrument pilot skill trained... more This research investigated whether there was equal improvement for instrument pilot skill trained under an immersive virtual environment (IVE) versus a nonimmersive virtual environment (NIVE). In the IVE, sensory input to the human from external world is provided by head mounted displays, while NIVEs are represented by desktop displays. Subjects were tested in IVE and NIVE flight scenarios using three flying tasks—normal crosswind approach and landing (NCAL), go-around (GA) and constant speed during climbing and descending (CSCD). Error rate data were analyzed for four pilot control tasks. The results show that NIVE provides error rate reduction for training altitude control under NCAL and GA tasks, and vertical speed control for CSCD. No significant differences were observed for both NIVE and IVE for vertical speed control. IVE showed error rate decrements for the rest of the tasks.
Evaluating a Wicked Problem from a Social Network Analysis Perspective
ABSTRACT
Intelligent Objects in Human-Computer Interaction
International Conference on Human-Computer Interaction, Aug 22, 1999
This research was conducted as a pilot study to model and simulate a mobile ad hoc network (MANET... more This research was conducted as a pilot study to model and simulate a mobile ad hoc network (MANET) as a system of systems (SoS) using selected human behavioral traits. A MANET as used in the research is a physicsbased as well as a socio-technical system. As a socio-technical system (or human-machine system), multiple humans and multiple radios interact through some digital information connectivity. Thus, it is important to consider human behaviors in modeling and simulation of MANET systems in order to obtain useful performance metrics. It is observed that behavioral models are useful as MANETs seek to discover their neighbors through interconnection 1. REPORT DATE (DD-MM-YYYY
Trauma Center (TC) operations at hospitals are conducted as part of very complex environments. TC... more Trauma Center (TC) operations at hospitals are conducted as part of very complex environments. TCs, which are focused on life-saving and resuscitative actions in the treatment of trauma patients, engage many individuals in the solving of multifaceted and on-going ill-structured problems. The solutions to these problems are comprised of multiple human experts" resources that must collaborate to be effective in reducing complexity and providing information for systemic approaches to acute injury care. Understanding an emergency situation requires interdisciplinary and collaborative judgments, surgical decision-making in complex scenarios, hands on practical experience, and insight into difficult trauma situations. This paper addressed the application of collaborative sensemaking (CS) techniques to improve the decision making processes in TCs complex environments.
Microelectronics Reliability, 1986
Life Cycle Costing (LCC) has attracted growing attention as a tool for choosing between designs o... more Life Cycle Costing (LCC) has attracted growing attention as a tool for choosing between designs of operational facilities and between modes of operating them. Since failures, repairs, and replacements are major contributors to life cycle costs, it has become apparent that Reliability, Availability, and Maintalnability (RAM) modeling techniques should be incorporated into LCC modeling. A variety of approaches to combining these techniques have appeared in the technical literature. This paper is a state-of-the art review of the literature pertaining to availabillty-based life cycle cost analysis.
International Journal of Modelling and Simulation, 1994
a gamma distribution with parameters À and m. Thus, the parameter ex uniquely approximates m. Giv... more a gamma distribution with parameters À and m. Thus, the parameter ex uniquely approximates m. Given F(/) , we can generate a random variate that is governed by the probability density function, f(l). The inverse transformation method offers a simpie, straightforward approach to this problem. This is obtained as follows: ( 3 )
: The paper presents a preliminary result of using cognitive- and behavior-based modeling framewo... more : The paper presents a preliminary result of using cognitive- and behavior-based modeling framework to simulate a network of MANETs (Mobile Adhoc NETworks) as intelligent agents in a tactical battlefield. We demonstrate the efficacies of an agent-based modeling and the need for developing formal methods for multi-agent simulations from a system of systems (SoS) perspective. The development of our model framework informs the need to describe behaviors and relationships of actors and objects in the context of a mission space, and 2) to provide a foundation for modeling agent behaviors in a way that is plausible with respect to human behavior, a specially from the standpoint of human-system interactions.
Comparison of Three Display Methodologies for Battlefield Resource Management
Proceedings of the Human Factors and Ergonomics Society Annual Meeting, 1998
As the Army prepares to move into the next century, it is exploring advances in technology that w... more As the Army prepares to move into the next century, it is exploring advances in technology that will enable U.S. military forces to obtain more complete data regarding its mission, enemy and friendly troop locations, weather, and target status. Not only will this data be more accurate, it will be collected and transmitted in near real-time. Advanced displays must be developed that allow commanders to efficiently deal with large volumes of data so that effective decisions can be made in a timely manner. This paper describes an experiment comparing three methods of displaying battlefield resources and unit mobility: (1) a combination of alphanumerics and standard Army decision graphics, (2) a configural display (CD) representation, and (3) an associative configural display representation (ACD). Results indicate that performance benefits are realized from both the CD and ACD representations, but the CD proved to be the best overall.
Qualitative Simulation of Human Command & Control System Effectiveness
Abstract : Capturing information for performance modeling of the human aspect of C2 performance c... more Abstract : Capturing information for performance modeling of the human aspect of C2 performance can be difficult and time consuming. Usually, a parametric approach is favored, but overall, technology performance is used to calibrate performance. It is difficult to determine or assess the aspects of human performance in the technologically driven C2 systems. This paper presents a novel approach using a qualitative evaluation metric based on fundamental matrix algebra. It is assumed that the performance of C2 to be achieved can be speculated by the commanders based on units to be commissioned and technological capabilities of the units. The ACAD software which allows commanders to simulate courses of action planning based on battle assets is used to demonstrate the model efficacy. The model illustrates the composite measure of C2 based on mission, as well as unit effectiveness based on the expectations of the higher command.
Microelectronics Reliability, 1992
The method for obtaining a sample from a gamma distribution is a very difficult task, and as such... more The method for obtaining a sample from a gamma distribution is a very difficult task, and as such has not been standardized. One of the many problems associated with this is the determination of the shape parameter. In this short note, a heuristic approximation is used to derive the value of gamma shape parameter for a general case (integer or real).
C2 for Complex Endeavors Title: The Process of Sensemaking in Complex Human Endeavors Topic: 1 (C2 Concepts, Theory, and Policy), 4( Cognitive and Social Issues), 3 (Modeling and Simulation)
ABSTRACT
EVA/ORU model architecture using RAMCOST
ABSTRACT
C4I3 Architectural Foundation for Real-Time Supervisory Control of Teleoperation
The Kluwer International Series in Engineering and Computer Science, 1996
This paper presents a paradigm for designing a supervisory control simulation model for teleopera... more This paper presents a paradigm for designing a supervisory control simulation model for teleoperated tasks. The architecture is conceptualized for real-time environment with command and control (C2) tasks operating synchronously. We demonstrate the application in a mining teleoperation domain.
Theoretical Issues and Design Principles for Human Interaction with Complex Systems
The Kluwer International Series in Engineering and Computer Science, 1996
The principal intend of this section is to present ideas, concerns, and frameworks for the design... more The principal intend of this section is to present ideas, concerns, and frameworks for the design of effective systems with which the human can interact. The issue of complexity—both in artificial and human systems is well known. For example, take a human and consider the fact that his or her behaviors, moods, attitudes, perception, and habits are constantly changing. According to Skinner (1965), all those aforementioned are elemental characteristics of the human behavior, often operating unconsciously, and, although they may appear simple, when summed together can be formidably complex. It can be said that in general human designers conceive artificial systems from a simple physical model of a molar object; and so, a) a simple structure of the object is built; b) some functions are added; and c) operational intelligence is conceived and added to the object. Often, by the time the design is completed, the object becomes so gigantic that even the designer may become ignorant of how to interact with the object—at least, to interact in “a friendly manner”.
Cognitive engineering for decision support modeling of diagnostic tasks in a complex system
SMC'98 Conference Proceedings. 1998 IEEE International Conference on Systems, Man, and Cybernetics (Cat. No.98CH36218)
In this paper, a new approach to diagnostic support modeling of a complex system maintenance proc... more In this paper, a new approach to diagnostic support modeling of a complex system maintenance process is described. From cognitive engineering perspective, methods for decomposing complex maintenance problems are developed. The "methods" are represented as intelligent diagnostic agents for use in a system level maintenance reasoning. Sample simulation results show that cognitive engineering driven diagnostic reasoning has higher performance reliability than the traditional rule-based (simulation) diagnostic systems.
A Formal Method for Deriving Command Production Language from Human Intents
Skill Training in Immersive and Nonimmersive Environments
ABSTRACT
Design principles for cognitive based human-machine interactions
Conference Proceedings 1991 IEEE International Conference on Systems, Man, and Cybernetics
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Papers by Celestine Ntuen