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Operations Research, Systems Engineering and Industrial Engineering Commons

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2001

Theses/Dissertations

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Articles 1 - 24 of 24

Full-Text Articles in Operations Research, Systems Engineering and Industrial Engineering

The Effect Of Cockpit Noise On Aircraft Pilot Psychomotor Performance, Kelechi (Kc) Nwabeke Oct 2001

The Effect Of Cockpit Noise On Aircraft Pilot Psychomotor Performance, Kelechi (Kc) Nwabeke

Theses - Daytona Beach

The purpose of this study was to evaluate the effect of cockpit noise on aircraft pilot psychomotor performance on a simulated tracking task. The performance of thirty-two participants was measured on a vertical and horizontal tracking task. In the control group, eight participants were used in a quiet condition. In the experimental group, eight participants were exposed to low intensity cockpit noise (50 dBA), eight participants were exposed to medium intensity cockpit noise (60 dBA) and eight participants were expose to high intensity cockpit noise (70 dBA). The performance of the control and experimental groups was measured in an advanced ...


Designing Web-Based Adaptive Learning Environment : Distils As An Example, Lilian Cao Aug 2001

Designing Web-Based Adaptive Learning Environment : Distils As An Example, Lilian Cao

Dissertations

In this study, two components are developed for the Web-based adaptive learning: an online Intelligent Tutoring Tool (ITT) and an Adaptive Lecture Guidance (ALG). The ITT provides students timely problem-solving help in a dynamic Web environment. The ALG prevents students from being disoriented when a new domain is presented using Web technology. A prototype, Distributed Intelligent Learning System (DISTILS), has been implemented in a general chemistry laboratory domain.

In DISTILS, students interact with the ITT through a Web browser. When a student selects a problem, the problem is formatted and displayed in the user interface for the student to solve ...


The Effects Of Sound Cue Characteristics On Overcoming Front/Back Localization Errors In A 3-D Auditory Display, Robert J. Ehmann Jul 2001

The Effects Of Sound Cue Characteristics On Overcoming Front/Back Localization Errors In A 3-D Auditory Display, Robert J. Ehmann

Theses - Daytona Beach

The purpose of this study was to investigate the performance effects of adding an additional sound cue characteristic to a 3-D auditory display sound stimulus to increase localization accuracy. Previous literature has provided evidence that localization accuracy for direct front and direct back regions is significantly worse than that of locations in the periphery for virtual 3-D auditory stimuli. In the study conducted, a highpass filter addition or a lowpass filter addition was compared to a "normal" condition for both the front and back locations. Results of the study showed that the best localization performance for the front location occurred ...


Effect Of Tactile Feedback On Performance, Darren Paul Wilson Jul 2001

Effect Of Tactile Feedback On Performance, Darren Paul Wilson

Theses - Daytona Beach

Humans interact with their environment by obtaining information from various modalities of sensing. These various modalities of sensing combine to facilitate manipulation and interaction with objects and the environment. The way humans interact with computers mirrors this environmental interaction with the absence of feedback from the tactile channel. The majority of computer operation is completed visually because currently, the primary feedback humans receive from computers is through the eyes. This strong dependence on the visual modality can cause visual fatigue and fixation on displays, resulting in errors and a decrease in performance. Distributing tasks and information across sensory modalities could ...


Effects Of Handedness On Completion Time During Performance Of Multiple Tasks Using “Proper” And “Improper” Tools, Lisnnette M. Nieves Suarez Jul 2001

Effects Of Handedness On Completion Time During Performance Of Multiple Tasks Using “Proper” And “Improper” Tools, Lisnnette M. Nieves Suarez

Theses - Daytona Beach

Handedness is a very critical factor involving single or multiple tasks that are designed for a specific hand. The purpose of this research was to investigate the effect of proper tool design. This research identified the dominant hand and measured task completion time between each of two tasks, 1) the use of left and right-handed scissors using the right hand, and 2) Mouse Manipulation Task using the calculator provided by the computer with a left and right-handed mouse using the right hand. Annett’s (1995) 12-item questionnaire was used to identify the preferred hand. This questionnaire consisted of having the ...


Simulation Optimization Studies Of Routing And Process Flow Problems, Satish Ravichandran Jul 2001

Simulation Optimization Studies Of Routing And Process Flow Problems, Satish Ravichandran

Electrical & Computer Engineering Theses & Disssertations

Computer aided simulation is emerging as a powerful tool for numerical analysis and in conducting performance evaluations of complex systems that depend on a multitude of variables. The primary objective in such simulation studies is to gauge the performance of the system under a various constraints and operating conditions. The effects of changing the operating parameter space can thus be analyzed without having to implement costly changes. Simulations are also carried out for the baseline scenarios to verity and validate the basic underlying system model. In this thesis research, two practical problems were studied through numerical modeling, and optimized solutions ...


A Conceptual Framework Of Cost/Benefit Justification For Ergonomic Projects To Reduce Musculoskeletal Disorders In The Workplace, Nitipong Boon-Long May 2001

A Conceptual Framework Of Cost/Benefit Justification For Ergonomic Projects To Reduce Musculoskeletal Disorders In The Workplace, Nitipong Boon-Long

Dissertations

A framework for justifying ergonomic projects to the overall cost savings is developed which estimates the extent of musculoskeletal disorders (MSDs) exposures to a specific industry. A cost structure is developed to estimate the investment needed for an ergonomics program and the costs related to MSDs problems including workers' compensation costs, work-related costs, and labor turnover costs. Data was adopted from sources including Bureau of Labor Statistics (BLS), the Healthcare Cost and Utilization Project (HCUP-3), and estimates suggested in OSHA's former Ergonomics Standard. Top fifteen manufacturing industries with the highest MSDs rates were selected to apply the framework. Results ...


A Novel Approach Towards Usability Studies For Visual Search Tasks In Graphical User Interface Applications Using The Activity Theory Approach, Tirthankar Sengupta May 2001

A Novel Approach Towards Usability Studies For Visual Search Tasks In Graphical User Interface Applications Using The Activity Theory Approach, Tirthankar Sengupta

Theses

The field of Human Computer Interaction still strives for a generalized model of visual search tasks (icon search, menu search, text search, label search, search through hypertext and feature recognition). The existing models of visual search, in spite of being impressive, are limited under certain perspectives due to lack of generality. The thesis tries to provide a holistic approach for the modeling of visual search tasks in graphical user interfaces from the Activity Theory (AT) perspective with the aim of rendering a theoretical bridge between HCI and Psychology. A detailed review of literature from the variegated discipline contributing to the ...


Simulation Modeling For Integrated E-Supply Chain Management, Pornsarun Wirojanagud May 2001

Simulation Modeling For Integrated E-Supply Chain Management, Pornsarun Wirojanagud

Theses

E-supply chain management is an emerging area of interest as companies begin to explore the Internet's potential to restructure supply chain relationships. The environmental impact of e-supply chain management is a critical issue towards sustainability. This thesis discusses and models an integrated e-supply chain network accounting for material and information flows throughout the supply chain in order to analyze the environmental implications and tradeoffis with other system characteristics. The network structure has complex interactions between various entities. In order to understand and analyze dynamic performance, a discrete-event simulation approach is utilized. An integrated tool was developed using the Arena ...


Maximum Acceptable Oral Reading Speed For Voice Input Systems, Nirari M. Oda Apr 2001

Maximum Acceptable Oral Reading Speed For Voice Input Systems, Nirari M. Oda

Master's Theses

The objective of this thesis was to study the effect of vocal duration period and background noise on psychophysical oral reading speed. Ten healthy white males (21-28 years old) were used as subjects. Experiment one was designed to determine Maximum Acceptable Oral Reading Speed (MAORS) for an 8-hour period using psychophysical methodology. Results indicate that 114 words/min was an acceptable oral reading rate for an 8-hour day. Furthermore, 2 hours and 20 minutes is an acceptable testing period ( equivalent to the 8-hour day). Acoustical and physiological variables support these findings. Experiment two was designed to study the effect of ...


Study Of Automotive Hydromount Mechanism, Min Lu Apr 2001

Study Of Automotive Hydromount Mechanism, Min Lu

Dissertations

The hydromount mechanism is studied. It was determined that the dynamic characteristics of the hydromounts are related to the rubber static stiffness, rubber damping coefficient, volumetric stiffness, and effectiveness of the oscillating fluid in the inertia track. At high frequencies the motion of the fluid in the inertia track diminishes so that its effect is negligible and may be ignored. It is also concluded that the rubber damping has a minimal effect on the hydromount dynamic properties and may be neglected. The maximum loss angle, which corresponds to the maximum damping coefficient of the hydromount, occurs near the inertia track ...


Setting Contract Levels To Buy And Sell Capacity In The Semiconductor Industry, Robert A. Barbieri Jan 2001

Setting Contract Levels To Buy And Sell Capacity In The Semiconductor Industry, Robert A. Barbieri

Theses and Dissertations

No abstract provided.


Integrated Replacement Analysis And Production Planning, Molly O'Bryne Clarke Jan 2001

Integrated Replacement Analysis And Production Planning, Molly O'Bryne Clarke

Theses and Dissertations

No abstract provided.


Development Programs For One-Shot Systems Using Multiple-State Design Reliability Models , Suntichai Shevasuthisilp Jan 2001

Development Programs For One-Shot Systems Using Multiple-State Design Reliability Models , Suntichai Shevasuthisilp

Retrospective Theses and Dissertations

Design reliability at the beginning of a product development program is typically low and development costs account for a large proportion of the total product cost. Our research focuses on how to conduct "development programs" (series of tests and redesigns) to both achieve high final design reliability and spend as little of a fixed budget as possible on development. Multiple-state reliability models are used. We consider one-shot systems, which are destroyed at first use or during testing. Dynamic programming is used to identify the best test-and-redesign strategy and is shown to presently be computationally feasible for at least 5 state ...


Rapid Prototyping Technologies And Build Time Models, Lisa Armano Jan 2001

Rapid Prototyping Technologies And Build Time Models, Lisa Armano

Theses and Dissertations

No abstract provided.


A Framework For The Implementation Of An Iso 9000 Based Certification Program For Printed Circuit Board Manufacturers, Adam Y. Maamoun Jan 2001

A Framework For The Implementation Of An Iso 9000 Based Certification Program For Printed Circuit Board Manufacturers, Adam Y. Maamoun

Retrospective Theses and Dissertations

No abstract provided.


Use Of Incremental Adaptation And Habituation Regimens For Mitigating Optokinetic Side-Effects, David A. Graeber Jan 2001

Use Of Incremental Adaptation And Habituation Regimens For Mitigating Optokinetic Side-Effects, David A. Graeber

Retrospective Theses and Dissertations

The use of incremental and repeated exposures regimens have been put forth as effective means to mitigate visually induced motion sickness based on the Dual Process Theory (DPT) (Groves & Thompson, 1970) of neural plasticity. In essence, DPT suggests that by incrementing stimulus intensity the depression opponent process should be allowed to exert greater control over the net outcome than the sensitization opponent process, thereby minimizing side-effects. This conceptual model was tested by empirically validating the effectiveness of adaptation, incremental adaptation, habituation, and incremental habituation regimens to mitigate side-effects arising from exposure to an optokinetic drum. Forty college students from the ...


Design Of A Web-Based Integrated Material Handling System For Manufacturing Applications , Chiwoon Cho Jan 2001

Design Of A Web-Based Integrated Material Handling System For Manufacturing Applications , Chiwoon Cho

Retrospective Theses and Dissertations

In this research, a Web-based system called DESIGNER for the design of integrated material handling systems is developed. DESIGNER models the material handling system design processes including the material handling equipment (MHE) selection and employs information on the most common MHE types used in material movement, storage, and positioning.;The system designs the material handling system for an application through three phases. In Phase I, the procedure identifies the most appropriate MHE type among the alternatives that are suitable for the application. Knowledge-based rules are employed to identify alternative handling equipment for each material flow link. To select the final ...


Developing A Multi-Attribute Utility Model (Maum) For Selecting Information Technologies In The Construction Industry , Tarek Elsayed Elmisalami Jan 2001

Developing A Multi-Attribute Utility Model (Maum) For Selecting Information Technologies In The Construction Industry , Tarek Elsayed Elmisalami

Retrospective Theses and Dissertations

The construction industry lags behind other industries in adopting new information technologies (ITs). The current construction procedures used to transfer data need to be updated. The most common data capture technologies are bar code and radio frequency identification (RFID) tagging. Although bar code and RFID systems are quite different, they might accomplish the same tasks.;In fact, so many new data capture technologies now exist that industry managers are often perplexed when they plan a new system. This research develops a decision tool that enables decision makers in the construction industry to select the most appropriate data capturing technology for ...


Generation Planning For Electric Power Utilities Under Market Uncertainties: A Real Options Approach , Chung-Hsiao Wang Jan 2001

Generation Planning For Electric Power Utilities Under Market Uncertainties: A Real Options Approach , Chung-Hsiao Wang

Retrospective Theses and Dissertations

The generation business in the U.S. is currently undergoing a transition from a regulated monopoly toward an uncertain, competitive market. Under the competitive market, the price of electric power as well as the corresponding revenue may be much less certain than before. These market uncertainties have increased the significance of two critical factors in generation planning. These factors are financial risks and managerial flexibilities.;In order to quantitatively and objectively address these two factors in generation planning, in this dissertation, we design and analyze a series of mathematical models based on the real options approach for generation planning. Hence ...


Controlling Schedulability-Reliability Trade-Offs In Real-Time Systems , RaʼEd Mohammad S. Al-Omari Jan 2001

Controlling Schedulability-Reliability Trade-Offs In Real-Time Systems , RaʼEd Mohammad S. Al-Omari

Retrospective Theses and Dissertations

The main focus of this thesis is to introduce new techniques that offer trade-offs between schedulability (ability of the system to accept more tasks) and reliability (ability of the system to tolerate more faults) in real-time systems. Different techniques have been introduced for different system models. The mechanisms that are used to offer trade-offs in these techniques differ based on the deadline strictness for each model. In this thesis, three different real-time models (hard, soft, and firm real-time systems) have been studied.;For hard real-time systems, the amount of time redundancy can be varied based on the number and type ...


The Development Of In-Process Surface Roughness Prediction Systems In Turning Operation Using Accelerometer , Hanming Huang Jan 2001

The Development Of In-Process Surface Roughness Prediction Systems In Turning Operation Using Accelerometer , Hanming Huang

Retrospective Theses and Dissertations

Three in-process surface roughness prediction (ISRP) systems using linear multiple regression, fuzzy logic, and fuzzy nets algorisms, respectively, were developed to allow the prediction of real time surface roughness of a work piece on a turning operation. The surface roughness is predicted from feed rate, spindle speed, depth of cut, and machining vibration that is detected and collected by an accelerometer.;Two groups of data were collected for two cutters with nose radii of 0.016 and 0.031 inches, respective. A total of 162 training data sets and 54 testing data sets for each cutter were applied to train ...


Interval Estimators Of Parameters For Normal One Sample And Balanced One-Way Random Effects Models When Data Are Rounded , Chiang-Sheng Lee Jan 2001

Interval Estimators Of Parameters For Normal One Sample And Balanced One-Way Random Effects Models When Data Are Rounded , Chiang-Sheng Lee

Retrospective Theses and Dissertations

In standard statistical analysis, data are typically assumed to be essentially exact. But in fact, all real data are reported to some smallest unit of measure related to the precision of the device used to produce them. We might call such data "rounded" because they are really obtained by "rounding to something." We first discuss the interval estimation of the parameters mu and sigma, when a single rounded sample comes from the N(mu, sigma 2) distribution with both parameters unknown. Then we discuss the interval estimation of variance components sigma and sigmatau if rounded data are from a balanced ...


Statistical Modeling And Design For Cmm-Type Data Locating Known Two-Dimensional Geometries , Dewi Rahardja Jan 2001

Statistical Modeling And Design For Cmm-Type Data Locating Known Two-Dimensional Geometries , Dewi Rahardja

Retrospective Theses and Dissertations

This research was motivated by a problem from a car-manufacturer that needed to compare/analyze two hood assembly fixtures. The consistency of the car hood placement was examined for both fixtures. A "constant width" gap between the hood and the car's body is preferred. A "wide" gap at one point and a "narrow" gap at another constitutes a bad quality placement of the car hood, and will affect customer satisfaction.;3-D data were taken using a Coordinate Measuring Machine (CMM) with 12 (fixed) probe paths to the hood. For each fixture, ten "12-dimensional" vectors were taken and the original ...