Digital Commons Network^™

Shock Waves In Nonequilibrium Gases And Plasmas, William M. Hilbun

Theses and Dissertations

An analysis and assessment of three mechanisms describing plasma/shock wave interactions was conducted under conditions typically encountered in a weakly ionized glow discharge. The mechanisms of ion-acoustic wave damping, post-shock energy addition and thermal inhomogeneities were examined by numerically solving the Euler equations with appropriate source terms adapted for each mechanism. Ion-acoustic wave damping was examined by modeling the partially ionized plasma as two fluids in one spatial dimension using the Riemann problem as a basis. Post-shock energy addition in the form of nonequilibrium vibrational energy relaxation was also examined in one spatial dimension using the Riemann problem as a …

A Study Of The Viability Of African American Adoption Recruitment Videotapes As A Promotional Tool For The One Church, One Child Of Pennsylvania, Incorporated Recruitment Campaign, Renee B. Gettys

Theses and Dissertations

Recognizing the enormous number of African American children in foster care in Pennsylvania, members of the Pennsylvania African American clergy, led by Reverend William B. Moore and the Honorable John F. White, Jr., Secretary of Public Welfare met with Governor Robert Casey in 1987.

This successful meeting resulted in the development of the One Church, One Child of Pennsylvania, Incorporated in 1987. The program is a branch of the national One Church, One Child organization, founded by Father George Clements in Chicago, 1970.

One Church, One Child of PA, Inc. is a non profit corporation in partnership with the Department …

A Comparison Of Movements And Burrow Usage Between Indigenous And Relocated Gopher Tortoises (Gopherus Polyphemus) In A Fall Line Sandhills Community, Dorinda Morpeth

Theses and Dissertations

The movements and burrow use of twenty (ten relocated and ten indigenous to the relocation site) adult gopher tortoises {Gopherus polyphemus) were followed during the late spring, summer and early autumn in Talbot County, Georgia. The objectives of this study were to determine whether relocated gopher tortoises developed fidelity to a relocation site, and whether indigenous tortoises reacted adversely to relocated tortoises released in their proximity. Ten tortoises in the right-of-way of a highway construction project were captured, fitted with transmitters, and relocated to a 336 hectare tract of land, 3.2 km east of Geneva, Talbot, County, Georgia. Concurrently, ten …

Parameter Estimation For Real Filtered Sinusoids, Daniel R. Zahirniak

Theses and Dissertations

This research develops theoretical methods for parameter estimation of filtered, pulsed sinusoids in noise and demonstrates their effectiveness for Electronic Warfare EW applications. Within the context of stochastic modeling, a new linear model, parameterized by a set of Linear Prediction LP coefficients, is derived for estimating the frequencies of filtered sinusoids. This model is an improvement over previous modeling techniques since the effects of the filter and the coefficients upon the noise statistics are properly accounted for during model development. From this linear model, a relationship between LP coefficient estimation and Maximum Likelihood ML frequency estimation is derived and several …

A Cost-Benefit Analysis Of Earned Value Management System Criteria, John R. Cole Jr., Judson M. Fussell

Theses and Dissertations

In December 1996, the Cost/Schedule Control Systems Criteria (C/SCSC) was officially replaced by the Earned Value Management Systems (EVMS) criteria. The switch to EVMS, coupled with current acquisition reform changes, have left many wondering what the effects of these changes will be. This thesis defines the costs and benefits of the old C/SCSC, and then compares them. Additionally, this thesis discusses the changes accompanying the switch to EVMS and the effect on the costs and benefits. The marginal costs of C/SCSC are defined as the difference between the costs of a C/SCSC compliant system and a contractors normal management control …

Foreign Military Sales Supply Support: Is There A Better Way?, Eric G. Ellmyer, Won Joon Jang

Theses and Dissertations

In today's world of declining defense budgets, there is an increasing need for South Korea to ensure they obtain the best dollar value when procuring defense articles. With the increasing financial situation, the purpose of this thesis is to research a surrogate third party firm and determine to what degree South Korea and other foreign military sales customers obtain the best value for their money for follow-on support item procurements. South Korea has participated in the Parts and Repair Ordering System program since its inception. However, South Korea has received little, if any, feedback regarding lead time and cost performance …

Development Of The Base Support Plan Process Model For Evaluation Of Proposed Process Improvement Initiatives, Daniel T. Kalosky, Patrick G. Walker

Theses and Dissertations

The primary role of the United States Air Force (USAF) logistics planner is to plan for war. For the wing level logistics planner, an important war planning product they are responsible for is the base support plan (BSP). The BSP is the installation level plan to support unified and specified command wartime operations plans, as well as MAJCOM supporting plans. Two Armstrong Laboratory sponsored initiatives exist to automate and enhance some of the BSP processes: the Survey Tool for Employment Planning (STEP) and Beddown Capability and Assessment Tool (BCAT). This research explored the BSP process and improvement initiatives by (1) …

Applying Cross-Decking And Activity-Based Costing To Military Distribution Centers: A Proposed Framework, Jonathan P. Elliott, Dwight H. Hintz Jr.

Theses and Dissertations

Current events and fiscal constraints have focused DoD planners' attention on reducing logistics costs and improving efficiency while maintaining effective combat operations support. Military leaders are seeking private industry best practices that may help the DoD achieve these goals. Two commercially successful business practices that may help the DoD achieve its goals are cross-docking and Activity-Based Costing (ABC). Cross-docking is a commercially proven approach to material distribution through a distribution center that can help reduce inventories, speed material flows, and cut related logistics activity costs. However, the DoD is faced with the challenge of costing current and potential logistics processes …

Identification And Reduction Of Bottlenecks Concerning Micap Re-Supply Of F-16 Weapons System Avionics Line Replaceable Units, Karl N. Muno, Patrick K. Pezoulas

Theses and Dissertations

This thesis evaluates selected F-16 avionics Line Replaceable Units (LRUs) transiting the logistics pipeline in order to examine the existence of bottlenecks and explore potential solutions within the current Department of Defense (DoD) logistics reparable pipeline. A previous study reported that a reduction in the overall pipeline resupply time of at least one day equates to a savings of approximately $25.45 million (Hill et al, 1990:iii). Bottlenecks cause movement delays to the entities moving through the logistics reparable pipeline. The pipeline segments are: AO (requisition), AE (item availability), AS (shipment status), and D6 (receipt). The bottlenecks of concern are those …

Relative Equilibria Of A Rigid Satellite In A Central Gravitational Field, Jeffrey A. Beck

Theses and Dissertations

We apply noncanonical Hamiltonian methods to examine relative equilibria of a rigid body in a central gravitational field. These equilibria correspond to fixed points of a reduced set of equations expressed in a rotating frame and are representative of an orbiting satellite with fixed attitude relative to an observer rotating at the orbital rate. Our objective is to clarify the relationship between the classical approximation and a recent noncanonical Hamiltonian treatment. In contrast to the classical approximation, the orbital and attitude equations of motion for the noncanonical system remain coupled and the general solution is a circular orbit for which …

Fiber Volume Fraction Effects On Fatigue Response Of A Scs-6/Ti-15-3 Metal Matrix Composite At Elevated Temperature, Sean C. Coghlan

Theses and Dissertations

The purpose of this study was to determine the effects of fiber volume fraction on the fatigue behavior of Silicon Carbide fiber-reinforced Titanium alloy, SCS-6/Ti-15-3. Three fiber volume fractions were investigated; 15%, 25%, and 42%. The tests were performed under fully-reversed, strain-controlled conditions at 427 °C. The primary objectives of this study were to develop a fatigue life diagram and to document the damage and failure mechanisms. Compressive loads on the slender specimens were kept from buckling the specimens through the use of a buckling guide. This device allows unrestricted axial movement of the composite, while preventing any out-of-plane motion. …

Case Studies In The Analysis Of The Dod Migration System Selection Process, Paul E. Boley Ii

Theses and Dissertations

One of the focuses of Corporate Information Management (CIM) initiative in the Department of Defense is the elimination of duplicate automated information systems. This thesis is a case study examination of the selection process in the logistics, transportation, and health functional areas. The case studies were performed through a one-time review of documents relating to system selections in each functional area. A review of strategic information systems planning and systems implementation literature is used to examine the results in the three areas. The thesis concludes with three suggestions for improving the selection process with an emphasis on systems implementation.

The Logistics Of Mobilizing And Supplying The Union Army During The Initial Stages Of The American Civil War, Trey G. Burrows

Theses and Dissertations

This thesis studies the logistics involved in mobilizing and supplying the Union Army at the onset of the Civil War. The main elements discussed are the sources, procedures, and items needed for the mobilization and supply efforts. Initially, the Union relied on the States to mobilize the military with the majority of the military being militia members or volunteers. The number of volunteers declined later in the war and the Union used both the bounty system and the draft for recruitment. Eventually, the Federal Government replaced the States as the primary mobilizing entity. The military needed supplies of weapons, clothing, …

Visitor Evaluation: An Exploratory Study For The Usaf Museum, William J. Wosilius

Theses and Dissertations

Research was conducted to determine a viable museum visitor evaluation method for use at the USAF Museum, Wright-Patterson AFB, OH. A 44 item questionnaire was developed, tested, and administered to 288 visitors to measure attitudes and collect information regarding the USAF Museum visitor base. Constructs in the questionnaire included: motivation for visiting, evaluation of the museum experience, transportation issues, general awareness of museum services, and demographic information. Analysis of the data indicated that enthusiasm for aviation and aviation history were the primary motivating factors and that advertising had little or no effect on visitation. In addition, the USAF Museum was …

International Armaments Cooperation In The Post-Cold War Era, Paul L. Hartman

Theses and Dissertations

During the height of the Cold War, the United States Department of Defense had a focused acquisition effort to produce major weapons systems. These weapons systems were developed as single service acquisition efforts. Their high costs were justified by their sophisticated technology, which enabled the U.S. military to gain and maintain air and ground combat superiority. Such acquisition practices significantly increased the defense budget, which peaked in 1985 at $414 billion. However, with the collapse of the Soviet Union and an absence of a single galvanizing threat to global security, the U.S. has been forced to drastically cut defense spending. …

Calibration And Validation Of The Cocomo Ii.1997.0 Cost/Schedule Estimating Model To The Space And Missile Systems Center Database, Wayne A. Bernheisel

Theses and Dissertations

The goal of this study was to determine the accuracy of COCOMO II.1997.0, a software cost and schedule estimating model, using Magnitude of Relative Error, Mean Magnitude of Relative Error, Relative Root Mean Square, and a 25 percent Prediction Level. Effort estimates were completed using the model in default and in calibrated mode. Calibration was accomplished by dividing four stratified data sets into two random validation and calibration data sets using five times resampling. The accuracy results were poor; the best having an accuracy of only .3332 within 40 percent of the time in calibrated mode. It was found that …

The Determinants Of The Housing Choices Of Military Families: Implications For Military Policy, William R. Forster

Theses and Dissertations

The Department of Defense (DOD) currently spends $8.2 billion dollars a year on military housing and housing allowances and yet there is no empirical model of the housing choices that military families make. This thesis creates a model of the housing choices of military families and then uses the model to predict the effects that changes in several policies would have on the housing decisions of military families. The changes in housing choices are then combined with current 1997 force structure data to predict both the monetary costs and benefits of each policy change. Data from the 1992 Surveys of …

An Examination Of The Demographic And Career Progression Of Air Force Institute Of Technology Cost Analysis Graduates, Christopher S. Dalton

Theses and Dissertations

The Air Force Institute of Technology (AFIT) was asked to develop a graduate curriculum to support cost analysts in the acquisition arena in October 1980. The first class entered in May 1982 and graduated in September 1983 with Master of Science degrees in Systems Management. This degree program gained autonomy by offering its first true Master of Science degree in Cost Analysis in 1988. Now there are nearly thirteen years of graduate cost analysts (GCAs) in the workforce. This thesis examined the impact this program has had on these graduates and the Air Force. Surveys were mailed out to 73 …

Factors Affecting The Unit Cost Of Weapon Systems, Mark W. Glenn

Theses and Dissertations

This research identifies variables and specifies equations that can be used to estimate the unit production cost of a weapon system. It is concerned with both explanation and prediction. Three major variables identified are cumulative quantity, production rate, and change in regime. Cumulative quantity is used in learning curve theory. Production rate is found in the U-shaped short and long-run cost curves of economic theory. This study uses the term regime to refer to any major change in the production environment of a weapon system. This research attempts to integrate the use of these three variables. A change in regime …

Calibration And Validation Of The Sage Software Cost/Schedule Estimating System To United States Air Force Databases, David B. Marzo

Theses and Dissertations

This research entailed calibration and validation of the SAGE Software Cost/Schedule Estimating System, Version 1.7 as a means to improve estimating accuracy for DoD software-intensive systems, and thereby introduce stability into software system development. SAGE calibration consisted of using historical data from completed projects at the Space and Missile Systems Center (SMC) and the Electronic Systems Center (ESC) to derive average performance factors (i.e., calibration factors) for pre-defined categories of projects. A project was categorized for calibration by either its primary application or by the contractor that developed it. The intent was to determine the more appropriate categorization for calibration. …

A Study Of Historical Inflation Forecasts Used In The Department Of Defense Future Years Defense Program, Mark S. Sweitzer

Theses and Dissertations

This thesis explores historical inflation forecasts used in the Department of Defense (DoD) Future Years Defense Program. The study examines historical DoD forecasts against experienced inflation as measured by the Gross National Product and Gross Domestic Product implicit price deflator (GNP/GDP IPD) from 1979 to 1996. This study also compares the accuracy of DoD forecasts with those made by the Congressional Budget Office (CBO) and Data Resources, Incorporated (DRI). The results regarding the performance of historical DoD inflation forecasts are mixed. Upon examining budget through five year GNP/GDP IPD forecast spans, DoD short-term results do not indicate a downward bias …

The Influence Of Foreign Culture On Air Force Contingency Contracting Operations, Christian M. Ruefer

Theses and Dissertations

Abstract Contingency Contracting Officers (CCOs) are increasingly finding themselves an integral part of overseas deployments, purchasing in theater whatever the combat forces cannot bring with them. As a result, CCOs must deal directly with businesses and the individuals who operate them in the deployed location. Cultural differences between the CCO and suppliers can become an issue not encountered in stateside operations. This thesis was designed to explore the possible impact of culture on the deployed CCO's ability to do their job. There were four objectives of this study. First, those tasks CCOs must accomplish in order to perform their job …

Calibration And Validation Of The Checkpoint Model To The Air Force Electronic Systems Center Software Database, Thomas C. Shrum

Theses and Dissertations

This research effort focused on the calibration and validation of CHECKPOINT Version 2.3.1, a computerized software cost estimating tool, to the USAF Electronic Systems Center (ESC) software database. This thesis is a direct follow-on to a 1996 CHECKPOINT study at the Air Force Institute of Technology, which successfully calibrated and validated CHECKPOINT to the SMC software database. While this research generally parallels the methodology in the aforementioned study, it offers advancements in the CHECKPOINT calibration and validation procedure, and it refines the data stratification process and the statistical analyses employed. After stratifying the ESC software database into ten usable data …

Tracking Overhead Orta Costs In Technology Transfer Activities, Thomas S. Van Egeren

Theses and Dissertations

An ever shrinking Research and Development (R&D) budget, coupled with a widespread perception that the nation is not realizing an adequate return from its substantial investment in the federal laboratory system, has paved the way for an increase in the transfer of technology from the federal laboratories to the private sector. The objective of this research is to determine the indirect cost of performing technology transfer by identifying the resources consumed by several key Office of Research and Technology Applications (ORTA) organizations and the activities performed within these organizations. It was hypothesized that the ORTA organizations, which are considered indirect …

An Investigation Of Prioritizing Research Topics In Professional Communication, Richard G. Buschagen

Theses and Dissertations

This research explored which areas and methods of research need to be identified and developed to most effectively communicate business and technical information. The research was sparked by the current literature which indicates that a gap exists between academicians, who do most of the research, and practitioners, who utilize the research results. This effort was intended to address possible causes of this problem by establishing the importance of nine research topic areas, six data collection methods/sources, and three data analysis methods for both academicians and researchers and other demographic characteristics. The research concludes that the participants generally agreed on which …

Formation Of U.S. Security Assistance Policy: 1947-1959, Gregory S. Mazul

Theses and Dissertations

Security assistance has played a vital role in the formation of foreign policy objectives throughout United States history. It is generally accepted that a formal security assistance program was initiated in the U.S. following the conclusion of World War II with the signing of the Greek Turkish Aid Bill. From this point forward the U.S. would embark on a global attempt to shape the world political environment to suit our own national objectives and priorities. The period between 1947 and 1959 offers a unique look at the formative years of our national security assistance program both in terms of world …

A Comparison Of Contracts Involving The Privatization Of Newark Afb And The Naval Air Warfare Center-Indianapolis, James P. Valley

Theses and Dissertations

This thesis studies the contract types and incentives involved in the privatization of Newark AFB and the Naval Air Warfare Center-Indianapolis. Newark AFB was slated to close by the Base Realignment and Closure Commission (BRAC) in 1993. The Air Force decided to utilize an Indefinite Delivery Indefinite Quantity (IDIQ) contract, and utilize an award fee to incentivize the contractor. In 1995, the BRAC commission decided to close the Naval Air Warfare Center-Indianapolis. The Navy also decided to utilize an IDIQ contract and has mostly utilized the Fixed Price Level of Effort contract to obtain its requirements. Through interviews and a …

The Impact Of The Packard Commission's Recommendations On Reducing Cost Overruns In Major Defense Acquisition Programs, David A. Searle

Theses and Dissertations

This thesis examines the impact that recommendations made by the President's Blue Ribbon Commission on Defense Management, informally known as the Packard Commission, had on reducing cost overruns in major DoD acquisition programs. Cost overruns are a recurring problem in the DoD, and the study of possible effects resulting from the implementation of acquisition reform efforts such as the Packard Commission study could alter this trend. In this era of acquisition reform and downsizing it's important that policy makers understand the effects past and current policies have had and are having on reducing the ever present problem of cost overruns. …

An Examination Of The Past Performance Procedures Used In Air Force Materiel Command Source Selections, Jonathan L. Wright

Theses and Dissertations

The Air Force Materiel Command's mission is to acquire and maintain Air Force weapon systems. The primary contracting method of acquiring weapon systems uses source selections. A source selection is a means of evaluating proposals in terms of credibility, performance, and cost. Among the different criteria used in this selection, recent emphasis has been placed on the use of past performance. Formal guidelines for collecting and storing past performance information have already been established for acquisitions over $5 million. However, recent policy has directed the use of past performance for all acquisitions over $100,000. Presently, the $100,000 to $5 million …

The Impact Of The Federal Acquisition Streamlining Act Of 1994 On Post-Award Protest Frequency, Eric C. Duncan

Theses and Dissertations

The protest process is a means of ensuring that the Government conducts procurements in accordance with statutory and regulatory procedures. Additionally, protests serve a vital role in assuring full and open competition in the federal acquisition process. Protests can be costly in many aspects, including the direct costs of taking the action as well as more indirect costs such as program delays and damaged business relationships. The Government recognizes the negative impact protests have on the procurement process and has enacted several laws and regulations in an effort to reduce protest frequency and streamline procurement procedures. While it appears that …