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An Examination Of Agreement Type, Firm Size And Other Factors Affecting The Commercialization Of Air Force Technology, Robert S. Widmann
An Examination Of Agreement Type, Firm Size And Other Factors Affecting The Commercialization Of Air Force Technology, Robert S. Widmann
Theses and Dissertations
The objective of this thesis is to determine if a significant difference in the innovative strength of businesses exists when factors such as firm size, agreement type and other firm attributes are considered. Sample data for this study was collected by a telephone survey from firms selected from the Air Force population of CRDAs and SBIRs for Fiscal Years 1991-1993. The design of this survey, based on one used by Dr. Robert Berger to study SBIR outcomes, determines the degree of commercialization of the firm's product resulting from its agreement with the Air Force. This determination is then employed as …
A Performance Analysis Of The Air Force War Time Lean Logistics Pipeline, Craig S. Gaddis, David A. Haase
A Performance Analysis Of The Air Force War Time Lean Logistics Pipeline, Craig S. Gaddis, David A. Haase
Theses and Dissertations
Lean Logistics is an innovative proposal designed to reduce the costs associated with reparable inventory management. The purpose of this thesis is to determine whether a wartime lean logistics pipeline can maintain acceptable aircraft availability rates in response to induced variations of order and ship time (OST) and flying hours for deployed forces. The Dyna-MEIRIC Version 6.4 simulation program was used to evaluate nine different factor-level combinations. The factors, OST and flying hours were varied at three different levels, low, medium, and high. Analysis of the results was accomplished using a two-factor ANOVA. The authors discovered that while increasing OST …
A Study Of The Structural Limitation Affecting Implementation Of The Government Performance And Results Act In Air Force Materiel Command Logistics, Darwina M. Liguori
A Study Of The Structural Limitation Affecting Implementation Of The Government Performance And Results Act In Air Force Materiel Command Logistics, Darwina M. Liguori
Theses and Dissertations
This thesis provides an in-depth discussion of the Government Performance and Results Act (GPRA) of 1993. The GPRA is a new law that mandates strategic management be conducted in all federal government agencies. Soon all federal government agencies will be directed to comply with the requirements of the law and implement strategic management within their organizations. This study selected Air Force Materiel Command Headquarters (AFMC) logistics organizations and subordinate units as the test organization. Interviews were conducted with headquarters AFMC logistics and strategic planning personnel, as well as 88th Logistics Group personnel to evaluate several issues within their organization: (1) …
Aligning Demand For Spare Parts With Their Underlying Failure Mode, Steven D. Kephart, Richard C. Roberts
Aligning Demand For Spare Parts With Their Underlying Failure Mode, Steven D. Kephart, Richard C. Roberts
Theses and Dissertations
Current Air Force demand forecasting systems, DO41 and REALM, assume reparable demand is solely flying hour driven. The purpose of this study is to evaluate the relationship between demands, flying hours, and number of sorties at the work unit code level and improve reparable demand forecasting. A three phase methodology is used to analyze the demand, flying hour, and sortie relationship. The first phase uses multiple regression to determine a relationship at various work unit code levels. Multiple regression provides limited correlation between demands, flying hours, and sorties. The second phase uses Poisson regression to evaluate the integer, count nature …
Tracking Air Force Pallets Using Rfid Technology: A Concept Study, Gary A. Gross
Tracking Air Force Pallets Using Rfid Technology: A Concept Study, Gary A. Gross
Theses and Dissertations
The lack of asset visibility experienced at Aerial Ports of Embarkation (APOEs) during Operation Desert Storm is a phenomenon that has occurred in every major conflict for the last 40 years. The costs associated with this lack of control directly relate to the combat readiness and capability of supported units. This study examined the possibility of installing a Radio Frequency Identification (RF-ID) system to track Department of Defense 463L pallets worldwide. Performance characteristics of commercially available RF-ID systems were summarized, and a conceptual Air Mobility Command (AMC) tracking system was presented. For purposes of concept study, Amtech Corporation's Intellitag RT …
The Effect Of Consolidating Two-Level Reparable Inventories On Aggregate Inventory Requirements And Mission Capability, Glenn R. Barney
The Effect Of Consolidating Two-Level Reparable Inventories On Aggregate Inventory Requirements And Mission Capability, Glenn R. Barney
Theses and Dissertations
One of the proposals of Lean Logistics is the relocation of many inventory assets to Intermediate Supply Points (ISPs). This research investigates the effect of consolidating Two Level Maintenance designated reparable asset inventories. The effects of interest are the potential reduction in aggregate inventory requirement and resulting savings and the effect of delayed issue of the assets on mission capability. The metric selected to measure the effect on mission capability for this study is the Not Mission Capable-Supply (NMCS) rate. A spreadsheet analysis of world-wide Two-Level Maintenance designated reparable asset demands over the study period is used to determine the …
A Review Of Fighter Aircraft Capability For Smart Bombs, David R. King
A Review Of Fighter Aircraft Capability For Smart Bombs, David R. King
Theses and Dissertations
This study examined potential alternatives and decision criteria for inclusion in a Cost and Operational Effectiveness Analysis to recommend an alternative for addressing existing DOD multi-role fighter capability to employ inertially guided smart bombs. A survey of literature and interviews with expens were used to collect required information. An Analytical Hierarchy Process (MIP) decision model was developed for two feasible alternatives and four relevant decision criteriL The two feasible alternatives included either developing the BRU-53 smart bomb rack, or modifying F-15E conformal fuel tanks with additional smart interface wiring. Data on quantitative and qualitative decision criteria were collected to evaluate …
The Foundation Of United States Security Assistance To Egypt: 1969-1979, Donald S. Massey
The Foundation Of United States Security Assistance To Egypt: 1969-1979, Donald S. Massey
Theses and Dissertations
This study sought to identify the role of U.S. foreign policy in shaping Egypt's transition from Soviet economic and military aid to U.S. security assistance from 1969 to 1979 and the factors shaping that transition. An historical analysis of the Nixon, Ford, and Carter Administrations and their foreign policy towards Egypt and the Middle East during the period in question was employed to complete this study. The researcher determined that U.S. diplomacy and dialogue in negotiating an Egyptian-Israeli peace resulted in the end to Soviet economic and military aid to Egypt. During the negotiating process, U.S. economic and military aid …
Security Assistance To Japan: Assessment Of Political, Military, And Economic Issues From 1947 To 1989, David W. Puvogel
Security Assistance To Japan: Assessment Of Political, Military, And Economic Issues From 1947 To 1989, David W. Puvogel
Theses and Dissertations
Japan is an important ally of the United States in part due to its strategic location at the intersection of China, Korea, and the Soviet Union. Japan is vital to the maintenance of regional stability and has been used by the United States in the East Asian balance of power. The relationship changed through time from the American occupation after World War II, to the rebuilding phase of Japan's economy, and finally a progression towards a more independent Japan capable of a larger portion of self defense. The rebuilding process of Japan was carried out largely by the United States …
Evaluation Of The Vehicle Out-Of-Commission Standard For Air Force Vehicle Maintenance Units, Christopher K. Arzberger, Lawrence F. Audet Jr.
Evaluation Of The Vehicle Out-Of-Commission Standard For Air Force Vehicle Maintenance Units, Christopher K. Arzberger, Lawrence F. Audet Jr.
Theses and Dissertations
Because the Department of Defense is facing budget and manpower reductions, the importance of productivity, efficiency, and effectiveness in daily operations is being stressed. Unfortunately, the VOC performance measure does not adequately apply these concepts. By examining the concepts of productivity, efficiency, and effectiveness, the inadequacy of the VOC measure is highlighted. A review of research into performance measurement is conducted, with emphasis on USAF transportation squadrons, to examine perceptions about the VOC measure. Because the VOC measure is viewed as inadequate, a review of performance measurement indicators throughout the government is analyzed to determine the type of performance measurement …
Order And Ship Times Of Communication-Electronic Components Under Lean Logistics And Conventional Air Force Reparable Pipeline: A Comparative Study, Clifford G. Altizer
Order And Ship Times Of Communication-Electronic Components Under Lean Logistics And Conventional Air Force Reparable Pipeline: A Comparative Study, Clifford G. Altizer
Theses and Dissertations
Lean logistics (LL) is a new logistics system that applies state-of-art business practices utilized in private industry to Air Force logistics processes. Several LL demonstrations have been initiated to develop the best way to implement these new practices in the operational arena. This study focused on the Command, Control, Communications, and Computers (C4) lean logistics demonstration. The repairables in this demonstration differ from aircraft repairables in that they are highly reliable and high-value items. This research determines that the use of LL principles results in shorter order and ship times for the customer. As a follow-on to this finding the …
Model Development For Forecasting Traffic Management Office Shipping And Budget Requirements, Luke E. Closson Iii
Model Development For Forecasting Traffic Management Office Shipping And Budget Requirements, Luke E. Closson Iii
Theses and Dissertations
This research represents an attempt to develop a quantitative tool that could be used to forecast Traffic Management Office (IMO) budget requirements for freight movements at base level within Air Combat Command. Regression analysis, using aircraft flying hours, aircraft sorties, and wing manpower levels as independent variables to predict shipping costs, was used in this research project. Each of the independent variables was aggregated and disaggregated at various levels in an attempt to develop a simple but accurate model. The results seem to suggest that aircraft flying hours, aircraft sorties, and wing manpower levels are not accurate predictors of TMO …
Effects Of Situational Factors On The Work Performance Of Aerial Port Technicians, Joseph T. Dougherty
Effects Of Situational Factors On The Work Performance Of Aerial Port Technicians, Joseph T. Dougherty
Theses and Dissertations
This research investigated the impact of situational factors on aerial port productivity. Results showed constraints had little impact on performance. However, perceptions of constraints and performance were significantly related to individual differences in temperament.
Measuring Behaviors Of Air Force Officers As Indicators Of Effective Performance And Leadership, Linda S. Hurry
Measuring Behaviors Of Air Force Officers As Indicators Of Effective Performance And Leadership, Linda S. Hurry
Theses and Dissertations
It is clear that the officer corps will play a key role in improving the Air Force's efficiency, preserving its traditions, and ensuring it maintains the highest level of combat capability. Yet, surprisingly, there is little agreement about exactly which types of officer performance contribute the most to meeting the Air Force's objectives. Performance requirements for officers have not been defined in terms specific enough to guide training course development and performance evaluations. This study identified the types of performance behaviors Air Force supervisors view as most important for effective officership. It also tested a model of individual officer effectiveness …
Incorporating Performance Heteroscedasticity In The Evaluation Of Job Performance, Max R. Massey
Incorporating Performance Heteroscedasticity In The Evaluation Of Job Performance, Max R. Massey
Theses and Dissertations
This study investigated the relation of agreeableness and experience with performance heteroscedasticity in small groups. Personality assessments were administered to 55 US Air Force personnel. The participants were placed in three groups based on the personality dimension of agreeableness. Group 1 consisted of eleven sub-groups of randomly paired individuals ranked high on agreeableness. Group 2 consisted of eleven subgroups of randomly paired individuals ranked low on agreeableness. Members of group 3 worked individually. Bach dyadic group and individual participant completed S load-planning scenarios over a five-day period. The data obtained over the 3 days were used to assess the variability …
U.S. Security Assistance To Latin America, Valerie S. Payne
U.S. Security Assistance To Latin America, Valerie S. Payne
Theses and Dissertations
The United States employs security assistance as an instrument of foreign policy. This thesis examines how security assistance was used to achieve U.S. foreign policy objectives in Latin America since the end of World War II. Qualitative analysis was used consisting of historical and archival research of government documents and secondary sources. A literature review was conducted to discover general trends concerning security assistance to include its establishment as an arm of foreign policy, its problems, and its purpose. Presidential policies toward Latin America are analyzed during and after World War II, to include Kennedy's Alliance for Progress, Nixon Doctrine, …
A Model For Forecasting Pollution Prevention Life Cycle Costs For Air Force Major Weapon Systems, Mark E. Garner, Jennifer S. Kirchoffer
A Model For Forecasting Pollution Prevention Life Cycle Costs For Air Force Major Weapon Systems, Mark E. Garner, Jennifer S. Kirchoffer
Theses and Dissertations
This research effort developed a modification to the HAZMAT program so that the program could provide the user with the capability to generate an estimate during the concept exploration and design phases for the total costs associated with hazardous materials usage in a major weapon system. Using the HAZMAT database, a spreadsheet was developed which projects a cost for a weapon system based on its total surface area and the number of aircraft to be produced by performing an analogy with a similar weapon system. The modification uses algorithm which are based on the hazardous material substances rather than processes …
A Study Of The Factors Associated With Successful Technology Transfer And Their Applicability To Air Force Technology Transfers, James B. Rose
A Study Of The Factors Associated With Successful Technology Transfer And Their Applicability To Air Force Technology Transfers, James B. Rose
Theses and Dissertations
Although the United States is a world leader in scientific research, it lags behind some economic powers in the application of technologies. As quality and manufacturing excellence were critical to US competitiveness in the l98Os, so is commercializing technologies in the 199Os. With billion dollar budgets and exceptional scientific talent, the potential for fruitful technology transfer is abundant. By definition, federal-to-commercial technology transfer is the ability to leverage national investments in technology beyond their traditional customer base. The technology can be physical devices, processes, knowledge, or proprietary information. Unfortunately, and despite exhaustive legislative efforts, US industry has fallen behind its …
Optical Characterization Of Indium Arsenide Antimonide Semiconductors Grown By Molecular Beam Epitaxy, Michael A. Marciniak
Optical Characterization Of Indium Arsenide Antimonide Semiconductors Grown By Molecular Beam Epitaxy, Michael A. Marciniak
Theses and Dissertations
The material parameters and crystalline quality of undoped, MBE-grown InAs1-xSbx nearly lattice-matched to (100) GaSb (-0.617% ≤ Δ a-a ≤ +0.708%) similar to material used for mid-infrared semiconductor lasers were determined by optical characterization. Absorption measurements at temperatures between 6-295 K determined the energy gap and wavelength-dependent absorption coefficient for each sample. The compositional dependence of the energy gap was anomalous when compared to previously reported data, suggesting phase separation existed in the material. The samples were also studied by temperature- and excitation-dependent photoluminescence (PL), which, for the majority of cases, showed only a single band-edge peak, …
Methods For Monitoring Process Control And Capability In The Presence Of Autocorrelation, Daniel J. Zalewski
Methods For Monitoring Process Control And Capability In The Presence Of Autocorrelation, Daniel J. Zalewski
Theses and Dissertations
When standard control charts are applied to a process whose measurements of quality exhibit autocorrelation, the performance of those charts can be considerably different than that expected when no autocorrelation is present. To model this performance, the existing definitions of assignable and chance causes of variation are extended to account for the variation induced by the autocorrelation structure. The application of statistical thinking toward continuous process improvement using the proposed taxonomy is discussed. A method to select control limits which yield a specified average run length in the absence of assignable causes of variation and which is suitable for use …
Nonlinear Geometric And Material Behavior Of Composite Shells With Large Strains, Scott A. Schimmels
Nonlinear Geometric And Material Behavior Of Composite Shells With Large Strains, Scott A. Schimmels
Theses and Dissertations
A two-dimensional, geometrically and materially nonlinear shell theory applicable to arbitrary geometries described by orthogonal curvilinear coordinates and encompassing large displacements, moderate rotations for large strain situations has been developed. Additionally, the theory includes Jacobian transformation matrices, based upon displacement parameters, for the Cauchy - 2nd Piola-Kirchhoff stress-state and the Cauchy (Almansi) - Green strain-state transformations, and a layered material approach is included for the elastoplastic analysis to allow for variation of plasticity through-the-thickness. Doubly curved 20, 28, and 36 degree-of-freedom finite elements are defined based on specialization of the theory to spherical coordinates. The computer program includes algorithms for …
The Dependence Of The Time-Asymptotic Structure Of 3-D Vortex Breakdown On Boundary And Initial Conditions, Jeffrey C. Tromp
The Dependence Of The Time-Asymptotic Structure Of 3-D Vortex Breakdown On Boundary And Initial Conditions, Jeffrey C. Tromp
Theses and Dissertations
The three-dimensional, compressible Navier-Stokes equations are solved numerically to simulate vortex breakdown in tubes. Time integration is performed with an implicit Beam-Warming algorithm, which uses fourth-order compact operators to discretize spatial derivatives. Initial conditions are obtained by solving the steady, compressible, and axisymmetric form of the Navier-Stokes equations using Newton's method. Stability of the axisymmetric initial conditions is assessed through 3-D time integration. Unique axisymmetric solutions at a Reynolds number of 250 lose stability to 3-D disturbances at a critical value of vortex strength, resulting in 3-D and time-periodic flow. Axisymmetric solutions at a Reynolds number of 1000 contain regions …
Tolerance Theory Of Periodic Surfaces, James A. Godsey
Tolerance Theory Of Periodic Surfaces, James A. Godsey
Theses and Dissertations
Two formulations for the far field statistical average power pattern of a strip grating with errors in strip and slit width are presented. The first formulation utilizes the Born approximation in which the unknown aperture fields are replaced by the incident fields. The second formulation utilizes an approximation which satisfies the edge condition. Approximations for the scattered fields are first derived using PEC surface equivalence for a TEz polarized plane wave incident upon a strip grating consisting of an infinite PEC screen cut by a number of infinitely long slits. Babinet's principle is then used to obtain approximations for the …
Ohmic Contact To Ion Implanted Gallium Arsenide Antimonide For Application To Indium Aluminum Arsenide-Gallium Arsenide Antimonide Heterostructure Insulated-Gate Field Effect Transistors, Kenneth G. Merkel Ii
Ohmic Contact To Ion Implanted Gallium Arsenide Antimonide For Application To Indium Aluminum Arsenide-Gallium Arsenide Antimonide Heterostructure Insulated-Gate Field Effect Transistors, Kenneth G. Merkel Ii
Theses and Dissertations
The p-channel In0.52Al0.48As-GaAs1-xSbx heterostructure insulated-gate field effect transistor (p-HIGFET) is a candidate for complementary integrated circuits due to superior cutoff characteristics and low gate leakage current. Advancement of the In0.52Al0.48As-GaAs1-xSbx p-HIGFET requires improved source-drain design. Five main tasks were accomplished to achieve this goal. First, thermal limits of the In0.52Al0.48As-GaAs0.51Sb0.49 HIGFET were investigated. Second, the temperature dependence of band gap and impurity energies were determined for beryllium doped In0.52Al0.48. Third, high acceptor concentrations were obtained …
Effects Of Blowing Ratios On Heat Transfer To The Throat Region Of A Porous-Walled Nozzle, Fu-Jung Chen
Effects Of Blowing Ratios On Heat Transfer To The Throat Region Of A Porous-Walled Nozzle, Fu-Jung Chen
Theses and Dissertations
The effects of transpiration cooling on heat transfer in the throat region of a porous-walled nozzle were investigated. The experiments were performed in the AFIT low speed shock tube fitted with a Mach 2 nozzle. A blowing region was limited to the area from 1.3 cm prior to the throat to 1.2 cm downstream of the throat. The blowing ratios from -0.0002 (suction) to 0.0117 (blowing) of the main stream flow were studied. Heat flux data were taken from both sides of the nozzle. One side was transpiration cooled by secondary air injection through a porous wall, while the other …
Physiologically-Based Pharmacokinetic Modeling Of Skin Absorption Using Dermal Subcompartments, Richard L. Bookout Jr.
Physiologically-Based Pharmacokinetic Modeling Of Skin Absorption Using Dermal Subcompartments, Richard L. Bookout Jr.
Theses and Dissertations
Dermal penetration of chemicals and drugs is important to both toxicologists and pharmacologists. Drug developers try to enhance and environmental professionals try to limit penetration of chemicals through the skin. Both can use predictive biologically-based mathematical models to assist in understanding the processes involved. When these models are based on physiological and biochemical parameters which can be measured in the laboratory, they can be extremely useful. Appropriately validated models based on first principles can be predictive of human exposures when the processes involved are adequately understood. In this thesis we develop four new physiologically-based pharmacokinetic (PBPK) models to predict blood …
Biomedical Data Interpolation For 3-D Visualization, Ming-Chung Chen
Biomedical Data Interpolation For 3-D Visualization, Ming-Chung Chen
Theses and Dissertations
Medical imaging devices that produce three-dimensional data usually produce the data in the form of image slices. In such images, the resolution in z direction is lower than in x and y directions. Before extracting and displaying objects in such images, an interpolated 3-D gray-scale volume image can be generated via image interpolation techniques to fill in the missing information. The subject of this thesis is the applying three different interpolation techniques to generate intermediate slices and comparing their qualities. The three interpolation techniques are linear interpolation, cubic spline interpolation, and Fourier interpolation. We also apply the CT image matching …
Optimal Wavefront Reconstruction For A Coherent Diffracted Field, William W. Arrasmith
Optimal Wavefront Reconstruction For A Coherent Diffracted Field, William W. Arrasmith
Theses and Dissertations
In sheared coherent beam interferometric imaging, an estimate of the average reflectivity profile of the object can be computed from measurements of point to point phase differences in the far field interference pattern and a suitable phase reconstruction technique. The phase difference information is encoded in the irradiance of three identical, shifted and superimposed speckled laser beam patterns. A minimum variance phase reconstruction technique is presented to estimate the phase of the field in the measurement plane from the phase differences and evaluate its performance. Prior knowledge of the phase covariance is used in the minimum variance reconstructor. Analytic calculations …
Scattering From Finite By Infinite Periodic Arrays With Arbitrary Piecewise-Linear Slot Elements, Paul R. Barre
Scattering From Finite By Infinite Periodic Arrays With Arbitrary Piecewise-Linear Slot Elements, Paul R. Barre
Theses and Dissertations
A numerical model for analyzing electromagnetic scattering from a planar Frequency Selective Surface (FSS) is developed. The model can represent an FSS with multiple arrays of arbitrary piecewise linear scatterers in a stratified dielectric medium. The FSS's arrays are finite by infinite, accounting for edge effects, where a periodic array element is formed from the piecewise linear connection of thin slots in a groundplane. The stratified dielectric medium is defined as an arbitrary stack of lossless dielectric slabs that sandwich the user defined arrays, simulating an FSS. The Surface Equivalence theorem is used to construct an equivalent problem based on …
Optimal Mixed-Norm Control Synthesis For Discrete-Time Linear Systems, David R. Jacques
Optimal Mixed-Norm Control Synthesis For Discrete-Time Linear Systems, David R. Jacques
Theses and Dissertations
A mixed-norm approach to control synthesis for discrete time linear systems is developed. Specifically, the problem of minimizing the H2 norm of a transfer function, subject to a combination of ℓ1 and-or H∞ norm constraints on dissimilar but related transfer functions is considered. The uniqueness of the optimal solution is shown, and numerical methods for approximating the optimal solution to within arbitrary accuracy are developed. These methods generally result in high order compensators which can not be implemented in most practical applications. In response to this, a numerical method is developed which solves for suboptimal solutions of …