Microcomputer Human Operator Simulator (HOS-IV)

1987 ◽  
Vol 31 (10) ◽  
pp. 1179-1183 ◽  
Author(s):  
Regina M. Harris ◽  
Helene P. Iavecchia ◽  
Lorna V. Ross ◽  
Steven C. Shaffer
Keyword(s):  
System Performance ◽  
External Environment ◽  
General Purpose ◽  
Human Operator ◽  
Generation Model ◽  
Simulation Tool ◽  
Hardware System ◽  
Motor Activities ◽  
Representation Scheme ◽  
Operator Workload

This paper describes the 4th-generation model of the Human Operator Simulator (HOS-IV) as implemented on an IBM PC AT microcomputer. HOS is a general purpose simulation tool for modeling the cognitive, perceptual, and motor activities of an operator who is performing a set of tasks during the course of a mission. HOS provides the capability to model the hardware system and the external environment which impact operator workload and system performance. Discussed are the new features of HOS-IV including the user-oriented interface, knowledge representation scheme, and enhanced modeling capabilities.

Everything you always Wanted to Know about HOS Micromodels but were Afraid to Ask

1988 ◽  
Vol 32 (16) ◽  
pp. 1051-1055 ◽  
Author(s):  
Regina M. Harris ◽  
Helene P. Iavecchia ◽  
Alvah C. Bittner
Keyword(s):  
System Design ◽  
Human Performance ◽  
General Purpose ◽  
Human Operator ◽  
Experimental Literature ◽  
Simulation Tool ◽  
Performance Models ◽  
Design Procedures ◽  
Human Operators

HOS-IV is a general purpose simulation tool for modeling human operators, systems, and the environment. To build a simulation, inputs to the model typically include descriptions of the system design, procedures for using the system, human operator characteristics, and a mission scenario. A set of operator micromodels are available to the HOS user to assist in the development of the simulation. These micromodels contain algorithms, based on experimental literature, that can predict the timing and accuracy of basic human cognitive, perceptual, and psychomotor actions. This paper describes the current set of human performance models available in HOS-IV as well as micromodels planned for development.

Global Task Management as Implemented in HOS-IV

1989 ◽  
Vol 33 (2) ◽  
pp. 101-104
Author(s):  
Helene P. Iavecchia ◽  
Regina M. Harris
Keyword(s):  
General Purpose ◽  
Human Operator ◽  
Software System ◽  
Simulation Tool ◽  
Task Management ◽  
Dynamic Interactions ◽  
Core Set ◽  
Sample Application ◽  
Accuracy Data

The Human Operator Simulator (HOS-IV) is a general purpose simulation tool. It can be used to simulate the dynamic interactions of the environment, the hardware/software system, as well as the operator. HOS-IV provides time and accuracy data for a core set of cognitive, perceptual, and psychomotor processes. The focus of this paper is the HOS-IV mechanism that is used to simulate global task management. A sample application that demonstrates HOS-IV task management is also presented.

Small Activated Sludge Performance and Viability Characteristics under Intermittent and Reduced Flows

1993 ◽  
Vol 28 (10) ◽  
pp. 309-316
Author(s):  
Bilsen Beler Baykal
Keyword(s):  
Activated Sludge ◽  
System Performance ◽  
Treatment Plant ◽  
Generation Model ◽  
Transient States ◽  
Stepwise Manner ◽  
Seasonal Basis ◽  
Soluble Substrate ◽  
House Site ◽  
Activated Sludge Systems

Small activated sludge systems operate in transient states under intermittent and variable flows. Simulations for such a treatment plant in a summer house site operating on a seasonal basis is investigated for system performance and viability using the five component inert soluble substrate generation model. The results have revealed that the viability drops to zero within the first month after the cessation of the feed for intermittently loaded systems that are fed during the summer months, while it never reaches that value for systems operating all year round with reduced flows off season. Restartup is compulsory for the intermittent loadings while the system adapts itself in a stepwise manner for the year round operation. Other factors being comparable, conventional operation with shorter sludge ages may be preferable since viability of the sludge is higher and the effluent COD is comparable.

A Manpower Determination Aid Based upon System Performance Requirements

1988 ◽  
Vol 32 (16) ◽  
pp. 1060-1064 ◽  
Author(s):  
K. Ronald Laughery ◽  
Susan Dahl ◽  
Jonathan Kaplan ◽  
Rick Archer ◽  
Gail Fontenelle
Keyword(s):  
Software Design ◽  
System Performance ◽  
Development Program ◽  
General Purpose ◽  
Performance Time ◽  
Methods Development ◽  
Performance Requirements ◽  
Workload Control ◽  
Component Failure Rates ◽  
And Function

This paper discusses two of the six software tools which are being developed as part of the Army Research Institute's MANPRINT Methods development program. The first tool discussed here is known as the System Performance and RAM Constraints Aid or SPARC. This tool permits system designers to determine levels of subfunction performance which are required to achieve function and higher level mission requirements. These levels of subfunction and function performance then serve as requirements which are fed into the second tool, the Manpower Systems Evaluation Aid (MAN-SEVAL). MAN-SEVAL takes as input the system design and then predicts the operator and maintainer manpower required to achieve the required levels of task and function performance. For maintenance manpower evaluation, MAN-SEVAL considers component failure rates, time to perform maintenance, and the mission scenario. For operator manpower and to estimate maintenance task times, MAN-SEVAL conducts an analysis of workload, control/display accessability, and maximum acceptable performance time to allocate tasks across crewmembers. Because all manpower requirements are truly driven by system performance requirements, these two tools are being developed collectively with common data bases and software design. While they are currently being developed for the Army, they will be useful general purpose manpower analysis tools.

scholarly journals The Evaluation of a General Purpose Bale System Performance and Its Bale Quality

2013 ◽  
Vol 38 (4) ◽  
pp. 223-227
Author(s):  
Dongil Chang ◽  
Sun-Ok Chung ◽  
Byoung-Kwan Cho ◽  
Dongseok Park ◽  
Namseok Sung ◽  
...  
Keyword(s):  
System Performance ◽  
General Purpose

A Study of Contemporary System Performance Testing Framework

2018 ◽  
pp. 7563-7576
Author(s):  
Alex Ng ◽  
Shiping Chen
Keyword(s):  
System Performance ◽  
Large Scale ◽  
Performance Test ◽  
Performance Testing ◽  
General Purpose ◽  
Testing Framework ◽  
The Core ◽  
Application Logic ◽  
The Common ◽  
Whole Life Cycle

Performance testing is one of the vital activities spanning the whole life cycle of software engineering. As a result, there are a considerable number of performance testing products and open source tools available. It has been observed that most of the existing performance testing products and tools are either too expensive and complicated for small projects, or too specific and simple for diverse performance tests. In this chapter, we will present an overview of existing performance test products/tools, provide a summary of some of the contemporary system performance testing frameworks, and capture the key requirements for a general-purpose performance testing framework. Based on our previous works, we propose a system performance testing framework which is suitable for both simple and small, as well as complicated and large-scale performance testing projects. The core of our framework contains an abstraction to facilitate performance testing by separating the application logic from the common performance testing functionality, and a set of general-purpose data model.

The Effects of Biodynamic Stress on Workload in Human Operators

1988 ◽  
Vol 32 (19) ◽  
pp. 1409-1413
Author(s):  
William B. Albery ◽  
Harry G. Armstrong ◽  
Merry M. Roe ◽  
Charles D. Goodyear ◽  
Kathy A. McCloskey
Keyword(s):  
Task Performance ◽  
Human Operator ◽  
Operator Performance ◽  
Human Operators ◽  
Operator Workload

The objective of this research was to assess the effects of two biodynamic stressors, noise and acceleration, commonly experienced in the aircraft cockpit, on human operator performance and workload. Thirteen workload measures, including one subjective, four performance and eight physiological, were recorded on subjects performing a dual psychomotor task. The results indicate that biodyanmic stressors such as noise and acceleration can adversely affect subjective operator workload without affecting objective task performance.

GRAS: a general-purpose 3-D Modular Simulation tool for space environment effects analysis

2005 ◽  
Vol 52 (6) ◽  
pp. 2294-2299 ◽  
Author(s):  
G. Santin ◽  
V. Ivanchenko ◽  
H. Evans ◽  
P. Nieminen ◽  
E. Daly
Keyword(s):  
General Purpose ◽  
Space Environment ◽  
Simulation Tool ◽  
Environment Effects ◽  
Modular Simulation

Target Tracking by PPI Display or by Automatic Computer

1964 ◽  
Vol 17 (4) ◽  
pp. 414-418
Author(s):  
L. Gérardin
Keyword(s):  
Target Tracking ◽  
General Purpose ◽  
Human Vision ◽  
Human Operator ◽  
Human Observer ◽  
Modes Of Operation ◽  
Automatic Computer ◽  
The Brain

The observation of a radar display by a human operator leads to the establishment of aircraft tracks. These tracks are subsequently used by the controller. More and more often, it is proposed to replace both PPI display and human observer by an automatic computer, either special or general purpose, to perform tracking.In the present paper the basic performances of these two modes of operation are examined, taking into account the psychological and physiological features of human vision and hence the mental association of the viewer. The computer is more precise, but more costly and, when saturated, the drop in performance is abrupt. The number of tracks handled by a human operator is small, but the brain is very versatile and works very well in confused situations, with a slower drop in efficiency than the computer.

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