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Air Force Institute of Technology

Theses/Dissertations

1999

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Why Didn’T You Tell Me?: Toward Building A Model Of Why Information Is Not Shared Well In Organizations, Robert C. Kitchen Dec 1999

Why Didn’T You Tell Me?: Toward Building A Model Of Why Information Is Not Shared Well In Organizations, Robert C. Kitchen

Theses and Dissertations

The effective use of information in an organization is vital to its success. One of the biggest investments being made today by companies is in their information infrastructures. However, with all of the resources being dedicated to improving information flows, evidence shows that organizations still do not share information as widely as they could or should be. Many studies have been conducted to learn the reasons why people in organizations do not share information as well as would be good. However, no study was found that reported the relative frequency of reported reasons for not sharing information. This paper gathers …

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Power, Performance, And Perception (P3): Integrating Usability Metrics And Technology Acceptance Determinants To Validate A New Model For Predicting System Usage, Alan P. Fiorello Dec 1999

Power, Performance, And Perception (P3): Integrating Usability Metrics And Technology Acceptance Determinants To Validate A New Model For Predicting System Usage, Alan P. Fiorello

Theses and Dissertations

Currently, there are two distinct approaches to assist information technology managers in the successful implementation of office automation software. The first approach resides within the field of usability engineering, while the second approach is derived from the discipline of management information systems (MIS). However, neither approach has successfully produced conclusive evidence that explains what characteristics facilitate system use as well as influence user acceptance of the system. This study reports on the validity of a new model, entitled the Power, Performance, Perception (P3) model, that links the constructs of usability engineering to user acceptance. Additionally, speech recognition software (SRS) was …

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Effects Of Foreign Object Damage From Small Hard Particles On The High-Cycle Fatigue Life Of Ti-6a1-4v, Joseph L. Hamrick Ii Dec 1999

Effects Of Foreign Object Damage From Small Hard Particles On The High-Cycle Fatigue Life Of Ti-6a1-4v, Joseph L. Hamrick Ii

Theses and Dissertations

Thin rectangular samples of Ti-6Al-4V were damaged by four methods to represent foreign object damage found in turbine engine blades: 1) impact with 2 mm and 5 mm diameter glass spheres at 305 m/s, 2) impact with 2 mm and 4 mm diameter steel spheres at 305 m/s, 3) quasi-static displacement controlled indentation using steel chisels with 1 mm, 2 mm and 5 mm diameter tips and 4) shearing notches with a 2 mm diameter chisel point under a quasi-static loading condition. Finite element analysis was used to study the relationship between the stress state created by the plastic damage …

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Application Of The Interaction Picture To Reactive Scattering In One Dimension, Michael J. Maclachlan Dec 1999

Application Of The Interaction Picture To Reactive Scattering In One Dimension, Michael J. Maclachlan

Theses and Dissertations

The interaction picture is used together with the channel-packet method in a new time-dependent approach to compute reactive scattering matrix elements. The channelpacket method enables the use of the interaction picture for computing reactive S-matrix elements by splitting the computational effort into two parts. First, asymptotic reactant and product wavepackets are individually propagated into the interaction region of the potential to form Moller states. The interaction picture, in contrast to the usual Schrödinger picture of quantum mechanics, is so constructed that a wavefunction that experiences no change in potential (that is, a free-particle wavefunction) remains always fixed, with no translation …

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An Assessment Of Mentoring Functions And Barriers To Mentoring, Kristopher A. Singer Dec 1999

An Assessment Of Mentoring Functions And Barriers To Mentoring, Kristopher A. Singer

Theses and Dissertations

A study of 91 Coast Guard junior officers and their mentors established the construct validity for mentoring functions and barriers to mentoring. The Air Force relies on supervisors to provide mentoring to their subordinates. The key predictors of whether junior officers report their supervisors as mentors were similarity between mentor and mentee and the quality of the supervisory relationship in terms of LMX and psychosocial and career development mentoring functions. The results demonstrated evidence for a compensatory theory of mentoring. Multiple mentors do not have a synergistic effect on mentoring relationships. The key predictors of reporting an additional mentor (other …

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Network Security Versus Network Connectivity: A Framework For Addressing The Issues Facing The Air Force Medical Community, Franklin E. Cunningham Jr. Dec 1999

Network Security Versus Network Connectivity: A Framework For Addressing The Issues Facing The Air Force Medical Community, Franklin E. Cunningham Jr.

Theses and Dissertations

The Air Force has instituted Barrier Reef to protect its networks. The Air Force medical community operates network connections that are incompatible with Barrier Reef. To overcome this problem, OASD(HA) directed the Tri-Service Management Program Office (TIMPO) to develop an architecture that protects all military health systems and allows them to link with all three services and outside partners. This research studied the underlying networking issues and formed a framework based on data from network experts from the Air Force's medical centers and their base network organizations. The findings were compared TIMPO and a composite framework was developed that more …

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Implementation Of Speech Recognition Software For Text Processing: An Exploratory Analysis, Sean P. Abell Dec 1999

Implementation Of Speech Recognition Software For Text Processing: An Exploratory Analysis, Sean P. Abell

Theses and Dissertations

The rationale behind implementing new information technologies is often to gain productivity improvements associated with the substitution of machinery for labor. However, the literature shows little direct evidence of a positive relationship between information technology investment and subsequent productivity benefits. This thesis reports on the examination into the productivity implications of implementing speech recognition software in a text processing environment. More specifically, research was conducted to compare text processing speeds and error rates using speech recognition software versus the keyboard and mouse. Of interest was the time required to input and proofread text processing tasks as well as the number …

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Impact Of Actual Facilitator Alignment, Co-Location, And Video Intervention On The Efficacy Of Distributed Group Support Systems, Brian J. Heberlie, Mary O. Tolbert Dec 1999

Impact Of Actual Facilitator Alignment, Co-Location, And Video Intervention On The Efficacy Of Distributed Group Support Systems, Brian J. Heberlie, Mary O. Tolbert

Theses and Dissertations

The growth of distributed group support systems (GSS) suggests that organizations will continue to bring dispersed groups of people together to make decisions over computer networks. In many instances those groups are temporarily assembled to address a task and then summarily disbanded never to work together again. In order for users to effectively use the GSS issues of trust and control need to be addressed within the GSS design. Users have perceptions about the fairness of structural and social determinants of the GSS design. These perceptions influence both the decision making process and process outcomes. This article shows the negative …

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Approximation And Optimization Of An Auditory Model For Realization In Vlsi Hardware, Samuel L. Sangregory Dec 1999

Approximation And Optimization Of An Auditory Model For Realization In Vlsi Hardware, Samuel L. Sangregory

Theses and Dissertations

The Auditory Image Model (AIM) is a software tool set developed to functionally model the role of the ear in the human hearing process. AIM includes detailed filter equations for the major functional portions of the ear. Currently, AIM is run on a workstation and requires 10 to 100 times real-time to process audio information and produce an auditory image. An all-digital approximation of the AIM which is suitable for implementation in very large scale integrated circuits is presented. This document details the mathematical models of AIM and the approximations and optimizations used to simplify the filtering and signal processing …

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A Numerical Simulation Of A Carbon Black Suspension Cell Via A Time-Reversed, Double Layer Compute Algorithm, Gregg T. Anderson Dec 1999

A Numerical Simulation Of A Carbon Black Suspension Cell Via A Time-Reversed, Double Layer Compute Algorithm, Gregg T. Anderson

Theses and Dissertations

A numerical simulation of a carbon black suspension cell is explored which models a laser-induced plasma within a liquid ethanol medium of approximately 1 mm thickness. The simulation model assumes a laser pulse with a pulse width of approximately 9 nsecs propagating in the left-to-right direction striking the front surface of the medium and focusing to a spot within the liquid volume. When the energy density within a given irradiated volume is sufficiently high, it ignites the carbon particles and generates a large number of free electrons, i.e., a plasma. The plasma couples with the in-coming laser energy on a …

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Towards A Game Theory Model Of Information Warfare, David A. Burke Dec 1999

Towards A Game Theory Model Of Information Warfare, David A. Burke

Theses and Dissertations

The repeated game of incomplete information model, a subclass of game theory models, was modified to include aspects of information warfare. The repeated game of incomplete information model was first developed to analyze nuclear weapons disarmament negotiations. The central role of information in this model suggested its applicability to IW, which focuses on the defense and acquisition of information. A randomized experimental design was utilized to determine how people behave in a laboratory IW setting and to test the IW game model's basic predictions. The impact of experience and learning on IW performance was also assessed during the experiment. IW …

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Evaporation Of Jet Fuels, Charles Eric Hack Dec 1999

Evaporation Of Jet Fuels, Charles Eric Hack

Theses and Dissertations

Determining the fate and transport of JP-8 jet fuel is a complex and important problem. As part of the startup procedures for jet engines, fuel is passed through aircraft engines before combustion is initiated. Because of the extremely low temperatures at northern tier Air Force bases, the unburned fuel does not evaporate readily and may come into contact with ground crew. To determine the amount and duration of contaminant contact, the evaporation of the emitted fuel must be modeled. The amount and composition of the fuel upon reaching the ground crew may be determined by droplet evaporation models that have …

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Information System Incidents: The Development Of A Damage Assessment Model, Mark D. Horony Dec 1999

Information System Incidents: The Development Of A Damage Assessment Model, Mark D. Horony

Theses and Dissertations

Information system (IS) incidents are on the rise. With low manning and undertrained information security specialists it is difficult for organizations to stop IS incidents from occurring. Once an incident has occurred it is the IS manager's responsibility to ensure that a full and accurate damage assessment has been accomplished. However, most IS managers lack the necessary tools to assess the damage from an incident. This exploratory thesis developed an IS incident damage assessment model (DAM) that can be part of the IS manager's tool kit. During the development of the model, it became apparent that the model was supported …

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An Analysis Of Training Adequacy And Additional Training Requirements As Perceived By Communications And Information Officers, Rex W. Little Dec 1999

An Analysis Of Training Adequacy And Additional Training Requirements As Perceived By Communications And Information Officers, Rex W. Little

Theses and Dissertations

This study explores requirements for additional training Communications and Information officers. This research also looks at the best time to provide training/education in the identified training deficient areas. Training areas and categories were established by two previous theses and were modified by a group of field experts for this research. The following questions were posed in an effort to obtain the perception of officers in the field: (1) What training areas do Communications and information officers feel are deficient? (2) At what point during a Communications and Information officer's career would it be most appropriate to receive training in necessary …

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Defining Virtual Interactions: A Taxonomy For Researchers And Practitioners, Glade G. Oxborrow Dec 1999

Defining Virtual Interactions: A Taxonomy For Researchers And Practitioners, Glade G. Oxborrow

Theses and Dissertations

Many uses for virtual technology are being identified by diverse organizational entities around the world. Before these technologies can be fully utilized, it is important to have a common definition and understanding of what is meant by the term virtual. It is also important to understand the structural configurations possible using virtual technology and the types of virtual interactions that may occur using these technologies. This thesis will define the basic premises, structures, and definitions applicable to vial interactions. It also defines various types of virtual interactions that may occur using virtual technology. These designations will help both practitioners and …

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Electrical And Optical Characterization Of Intrinsic And Ion-Implantation Induced Defects In 6h- And 4h-Sic, Michael B. Scott Dec 1999

Electrical And Optical Characterization Of Intrinsic And Ion-Implantation Induced Defects In 6h- And 4h-Sic, Michael B. Scott

Theses and Dissertations

Deep level transient spectroscopy (DLTS), Hall effect, and cathodolummescence (CL) measurements are used to characterize the intrinsic and ion-implantation induced defects in high-temperature (475 and 500 °C) ion-implanted epitaxial n-type 6H- and 4H-SiC, ion-implanted with Cr, Mg, Ar, N, and P atoms. Comparison of room-temperature and high-temperature ion-implanted 6H-SiC:Mg and :Cr indicate the significance of high-temperature ion implantation on the activation of the ion-implanted atoms and damage-recovery of the crystalline lattice. The effects of high-temperature annealing on both damage-recovery and implanted ion activation are detected and analyzed, from 1200 to 1800 °C. Trap parameters of both damage-related and species-related defects …

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Reverse Engineering Of Foreign Missiles Via Genetic Algorithm, Jon D. Wollam Dec 1999

Reverse Engineering Of Foreign Missiles Via Genetic Algorithm, Jon D. Wollam

Theses and Dissertations

One mission of the National Air Intelligence Center (NAIC) is the reverse engineering of foreign missile weapon systems from incomplete observational data. In the past, intuition and repeated runs of a missile performance model were required to converge to a solution compatible with observed flight characteristics. This approach can be cumbersome and time consuming, as well as being subject to undesirable influences from the analyst's preconceptions and biases. An alternative approach has been created to apply genetic algorithm (GA) techniques to allow automation of the process, wider exploration of the design space, and more optimal solutions matching the observational data. …

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Efficient Simulation Via Validation And Application Of An External Analytical Model, Thomas H. Irish Sep 1999

Efficient Simulation Via Validation And Application Of An External Analytical Model, Thomas H. Irish

Theses and Dissertations

This research makes significant contributions towards improving the efficiency of simulation studies using an external analytical model. The foundation for this research is the analytical control variate (ACV) method. The ACV method can produce significant variance reduction, but the resulting point estimate may exhibit bias. A Monte Carlo sampling method for resolving the bias problem is developed and demonstrated through a queueing network example. The method requires knowledge of the parameters and approximate distributions of the random variables used to produce the ACV. Often, some of these parameters or distributions are not known. Both parametric and non-parametric alternatives to the …

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Formal Representation And Application Of Software Design Information, Thomas M. Schorsch Sep 1999

Formal Representation And Application Of Software Design Information, Thomas M. Schorsch

Theses and Dissertations

Formal methods for developing software use mathematical frameworks to specify, develop and verify software systems, especially safety critical systems where error free software is a necessity. A transformation system is a formal method that refines a requirement specification into an implementation by successively adding design decisions in the form of precisely verified design information. Current algebraic representations of design information (specifications, morphisms, and interpretations) and methods for applying algebraic specification design information (diagram refinement) cannot correctly represent and apply design information involving higher level design information. This investigation develops innovative methods for constructing and refining structured algebraic requirement specifications, as …

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Professional Contracting Certification: An Examination And Model Development, Robert D. Lorton, Daniel I. Dunn Sep 1999

Professional Contracting Certification: An Examination And Model Development, Robert D. Lorton, Daniel I. Dunn

Theses and Dissertations

This study compared the elements of existing contracting certification programs to an ideal contracting certification model developed by experts. The expert panel responded to an open-ended electronic interview to convey their ideas regarding the individual elements for the model. Input received from the initial interviews was used to develop a survey for the panel members. The surveys were completed and results were recorded and conveyed back to the panel members. This process was repeated until a majority was reached on each individual element of the model, resulting in the ideal certification model. The final model contained elements of both the …

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Space-Available Transportation: An Analysis Of The Cost Of Providing 'Free' Travel, Frank J. Long Sep 1999

Space-Available Transportation: An Analysis Of The Cost Of Providing 'Free' Travel, Frank J. Long

Theses and Dissertations

The purpose of this study is to estimate the costs borne by the government for providing space-available travel to eligible uniformed services personnel and their dependents. As the primary provider of the space-available privilege, it is important that the Air Force have an estimate of the burden that the administration of that privilege places on the budget. In January 1993, the Air Force discontinued its 15-year-old practice of charging a fee for space-available travel aboard AMC-owned or controlled aircraft. The fee had been set at $10 in 1978 and was collected to recover a portion of the costs associated with …

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A Comparison Of Department Of Defense And Private Sector Fraternization Policies, Jeffrey L. Frye Sep 1999

A Comparison Of Department Of Defense And Private Sector Fraternization Policies, Jeffrey L. Frye

Theses and Dissertations

This thesis explores how the new Department of Defense fraternization policy compares with fraternization policies in use in the private sector. To examine this issue, a detailed discussion of the military and non-military position on fraternization is provided, specifically the non-military position towards workplace romances or dating between co-workers. This thesis then looks at the findings of several studies, surveys, and inquiries to determine how fraternization is currently regulated in the private sector. The results of this study show a majority of commercial organizations do not have written policies prohibiting employee relationships, whether they are peer-peer or supervisor-subordinate relationships. Results …

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Moderating Effects Of Station Isolation On Antecedents And Consequences Of Fraternization, Tonya M. Luther Sep 1999

Moderating Effects Of Station Isolation On Antecedents And Consequences Of Fraternization, Tonya M. Luther

Theses and Dissertations

The purpose of this study is to analyze any differences in reported incidents of fraternization based on relative isolation of location. To fulfill this purpose, a variety of types of fraternization cases were reviewed and analyzed. All data extracted was coded across five factors of fraternization and punishment. Statistical tests determined whether differences in fraternization factors were due to common error or to true differences based on relative isolation of location. Seven different hypotheses relating fraternization and location were tested. Statistical analysis showed that reported fraternization incidents are more likely to be of a sexual nature and involve people of …

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A Statistical Analysis Of The Variability Experienced In Dla Administrative And Production Lead Time, Kieran F. Keelty Sep 1999

A Statistical Analysis Of The Variability Experienced In Dla Administrative And Production Lead Time, Kieran F. Keelty

Theses and Dissertations

This study examined the variability experienced in the administrative and production lead times of consumable items managed by the Defense Logistics Agency (DLA). Assets were categorized based on an item manager's determination that an asset was a problem part, and whether the asset was purchased for stock replenishment or direct vendor delivery. The methodology was a two-sample t-test of aggregated data to determine if significant differences existed between the mean deviations from the system lead times of various combinations of categories. The study produced results indicating that a significant difference did not exist between the mean deviations of problem parts …

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A Methodology For The Analysis And Prediction Of Air Force Enlisted Aircraft Maintenance Personnel Retention Rates Using Economic Statistics, Peter D. Lommen Sep 1999

A Methodology For The Analysis And Prediction Of Air Force Enlisted Aircraft Maintenance Personnel Retention Rates Using Economic Statistics, Peter D. Lommen

Theses and Dissertations

The purpose of this study is to investigate the effects of certain national economic indicators on enlisted aircraft maintenance personnel retention rates. To fulfill this purpose, this study builds a linear regression equation that can predict the retention rate using the civilian unemployment rate and the index of 11 leading economic indicators as the independent variables. Journal literature and economic texts were reviewed to identify the indicators as good predictors for changes in employee turnover. The method of linear regression was used to build the model needed to predict the changes in the retention rate. The equation developed with this …

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Workplace Violence: Exploring The Dangers For Air Force Leadership, Shawn R. Jones Sep 1999

Workplace Violence: Exploring The Dangers For Air Force Leadership, Shawn R. Jones

Theses and Dissertations

The repeated occurrences of workplace violence throughout society today require the Air Force to evaluate its own workplaces and determine if a threat exists. This research explored violence in the workplace and established the possibility that workplace violence can affect the Air Force. Additionally, Air Force Climate Assessment Surveys were evaluated to find information that could be useful in detecting early warning signs of potential workplace violence. A number of examples of violence that occurred within Air Force workplaces highlighted the threat for Air Force leadership. With over 1,680 incidents of workplace violence reported to the AFOSI in a 5-year …

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Implementation Of Earned Value Management Into The Software Acquisition Process, Louis D. Bryan Sep 1999

Implementation Of Earned Value Management Into The Software Acquisition Process, Louis D. Bryan

Theses and Dissertations

The objective of this study was to determine the usefulness of Earned Value Management as a program management tool for the Department of Defense acquisition community. In making this determination, the study sought to uncover information about Earned Value Management from the contractor's perspective as well as the government administrator's perspective. It also sought to determine the usefulness of Earned Value Management during the different phases of the software acquisition process. The study utilized a structured questionnaire to acquire the data necessary for analysis. This data was analyzed to compare perceptions of the government and contractor communities in regard to …

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The Challenge Of Maintaining Or Replacing An Aging Airlift Fleet: A Cost/Capability Analysis For The Brazilian Air Force Mobility System, Julio C. Messias Sep 1999

The Challenge Of Maintaining Or Replacing An Aging Airlift Fleet: A Cost/Capability Analysis For The Brazilian Air Force Mobility System, Julio C. Messias

Theses and Dissertations

Despite the high Operational and Support costs incurred, the Brazilian Air Force's (BAF) declining budget has led to the establishment of conservative policies that favor short run solutions for a critical BAF airlift problem of operating an aging fleet. As a result of this policy, service life extensions of older airlift aircraft are the preferred solution. Using an equal airlift capacity approach to examine the Brazilian Air Force mobility system, this research performs a cost comparison analysis between two aircraft currently in operation at Brazilian's airlift command: C-130 Hercules and C-95 Bandeirante. To accomplish the cost analysis, this research develops …

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Pollution Prevention Cost Savings Using Supply Chain Reengineering, Gregory S. Webb Sep 1999

Pollution Prevention Cost Savings Using Supply Chain Reengineering, Gregory S. Webb

Theses and Dissertations

Supply chain management was explored as a tool to prevent hazardous waste and reduce operating costs. Previous research had shown that pollution prevention measures were often costly and no expectation of cost savings could be realized. The reengineering of the Air Force hazardous material supply chain brought about by the Hazardous Material Pharmacy Program was tested to evaluate if hazardous waste had been precluded in this effort and if costs had also been avoided. To date, no research had explored the use of supply chain management as a source reducer of hazardous waste. Consequently, little was known or understood of …

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The Impact Of Acquisition Reform And Political-Fiscal Variables On Air Force Gao-Protests Processed, Raymond M. Barben Sep 1999

The Impact Of Acquisition Reform And Political-Fiscal Variables On Air Force Gao-Protests Processed, Raymond M. Barben

Theses and Dissertations

The purpose of this research was to determine whether the Air Force contract protest frequency rises or falls with reforms in the acquisition process, number of AF Contract Actions, number of AF Contract Dollars, AF-GAO Sustain Rate, and/or General Economic Conditions (represented by the U.S. unemployment rate). Specific management questions address the effectiveness of acquisition reform initiatives, a comparison to other external factors, and the identification of AF-GAO Protest trends between 1984 and 1998. The research problem was explored with a thorough literature review and formulation of a multiple regression model. The research identified the need to evaluate the impact …

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