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Articles 901 - 930 of 1073
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Maintenance Resources Evaluation Technique, Jorge Guarnieri
Maintenance Resources Evaluation Technique, Jorge Guarnieri
Theses and Dissertations
The Argentine Air Force (AAF) has undertaken the task of reviewing its logistics doctrine with the aim of supporting its mission on the basis of better-designed resource structures. The adequate sizing of logistics support is essential to obtain the desired military capability, while optimizing resource use. A decision support tool tailored to the AAF environment is needed to size that logistics support. This research developed a mathematical logistics model to evaluate the mean number of aircraft that can be restored in a given time interval between consecutive sorties, for a given maintenance resources mix and base physical geometry. This maintenance …
A Modeling And Simulation Approach To Analyze The Workload Associated With The Growth Of Network Router Access Control Lists, Douglas R. Lomsdalen
A Modeling And Simulation Approach To Analyze The Workload Associated With The Growth Of Network Router Access Control Lists, Douglas R. Lomsdalen
Theses and Dissertations
Organizations can no longer isolate their networks from the rest of the world and still remain competitive. An organization willing to compete in the world market must take the necessary precautions to protect its network, the systems located on those networks, and its mission critical data. There are performance issues associated with the use of access control lists (ACL); however, if ACLs are implemented properly and periodically reviewed, a secure network can be attained. This research attempts to determine how the growth of an ACL affects packet flow and router CPU consumption, and also identify the specific length of an …
Non Co-Operative Detection Of Lpi/Lpd Signals Via Cyclic Spectral Analysis, Andrew M. Gillman
Non Co-Operative Detection Of Lpi/Lpd Signals Via Cyclic Spectral Analysis, Andrew M. Gillman
Theses and Dissertations
This research proposes and evaluates a novel technique for detecting LPI/LPD communication signals using a digital receiver primarily designed to detect radar signals, such as a Radar Warning Receiver (RWR) or an Electronic Support Measures (ESM) receiver. The proposed Cyclic Spectrum Analysis (CSA) receiver is a robust detector that takes advantage of the spectral correlation properties of second-order cyclostationary signals. A computationally efficient algorithm is used to estimate the Spectral Correlation Function (SCF). Using state-of-the-art FFT processing, it is expected that the proposed CSA receiver architecture could estimate the entire cyclic spectrum m approximately 0.6 ms. The estimate is then …
Application Of The Finite Element Method To The Scattering Of A Two-Dimensional, Semi-Infinite Periodic Structure, Perry N. Villanueva
Application Of The Finite Element Method To The Scattering Of A Two-Dimensional, Semi-Infinite Periodic Structure, Perry N. Villanueva
Theses and Dissertations
Infinite periodic structures have been studied heavily because of their efficient filtering capabilities. They generally exhibit sharp frequency roll-offs at the frequency band of interest. In the RF region of the electromagnetic spectrum, periodic structures find applications such as radomes and photonic bandgap materials. Most studies have been done with infinitely periodic arrays because it is convenient to collapse an infinite array into one representative period using Floquet Analysis. Truncating an infinite array introduces an edge and invalidates Floquet analysis over the entire array. This thesis formulates a Finite Element Method (FEM) solution of a semi-infinite periodic array consisting of …
A Validation Assessment Of Thunder 6.5'S Intelligence, Surveillance, And Reconnaissance Module, Francine N. Nelson
A Validation Assessment Of Thunder 6.5'S Intelligence, Surveillance, And Reconnaissance Module, Francine N. Nelson
Theses and Dissertations
A validation assessment of THUNDER 6.5's Intelligence, Surveillance, and Reconnaissance (ISR) module is accomplished using formulational and experimental validation techniques. A comparison of ISR purposes and processes according to military doctrine is made with the purposes and processes of ISR implemented within THUNDER 6.5. This comparison provides an overview of the process, an understanding of the level of aggregation within THUNDER, insight into possible problem areas in THUNDER, and a basis for improving THUNDER ISR processes. Sensitivity analysis of the ISR parameters as they relate to the Quality, Quantity, and Timeliness of ISR is also presented to provide insight into …
Technology Selection For The Air Force Research Laboratory Air Vehicles Directorate: An Analysis Using Value Focused Thinking, Michael F. Winthrop
Technology Selection For The Air Force Research Laboratory Air Vehicles Directorate: An Analysis Using Value Focused Thinking, Michael F. Winthrop
Theses and Dissertations
A technology selection model was developed for the Air Vehicles Directorate of Air Force Research Laboratory. The model was developed and demonstrated to aid in addressing the question of what technologies Air Vehicles' should invest in to remain consistent with Air Force values. Both Value-Focused Thinking and optimization approaches were used to identify the value of Air Vehicles technology, to provide insights to Air Vehicles' decision-makers, to determine where value gaps might exist with the scored alternatives, and to determine how sensitive the model was to changes. As a demonstration of the approach, seven technologies were scored, representing all three …
A Constructive Induction Approach To Computer Immunology, Kelley J. Cardinale, Hugh M. O'Donnell
A Constructive Induction Approach To Computer Immunology, Kelley J. Cardinale, Hugh M. O'Donnell
Theses and Dissertations
With the increasing birth rate of new viruses and the rise in interconnectivity and interoperability among computers, the burden of detecting and destroying computer viruses is severe. This research integrated four domains: computer virus detection, human immunology, computer immunology and an automated form of machine learning called constructive induction. First, a Computer Health System, based on the public health system, was defined to improve the 'global' approach to computer virus protection. Second, a computer immune model, based on the human immune system, was defined to improve the 'local' approach to virus detection. Third, the detection component of this computer immune …
Analysis Of Usaf Battlelabs' Communication Infrastructure Over Various Protocols, Rocky A. Favorito, David M. Mcillece
Analysis Of Usaf Battlelabs' Communication Infrastructure Over Various Protocols, Rocky A. Favorito, David M. Mcillece
Theses and Dissertations
As a result of the doctrines exposed in the Air Force's "Global Engagement: A Vision for the 21st Century Air Force," the concept of a "Battlelab" was devised to support and develop the key warfighting capabilities needed in the next century. Although geographically separated, these labs must have the capability to exchange information with each other in a "Virtual Battlelab Environment" (VBE). Although many types of data will be exchanged, only variable-bit-rate (VBR) video and distributed interactive simulation (DIS) traffic are modeled in the VBE. The research described in this thesis utilizes a systems engineering approach to investigate the performance …
A Climatology-Based Model For Long-Term Prediction Of Radar Beam Refraction, Todd S. Pittman
A Climatology-Based Model For Long-Term Prediction Of Radar Beam Refraction, Todd S. Pittman
Theses and Dissertations
The National Air Intelligence Center, WPAFB, OH, needs more accurate predictions of radar beam refraction. A new mode was developed for this thesis replacing the standard atmosphere approach with raytracing and climatology. Usually a microwave radio beam bends towards the earth with a radius of curvature greater than the earth's surface. However, seasonal and climatic variations influence the bending, and at times create temperature or moisture inversions that redirect the energy along the earth's surface leaving radio holes where there is no coverage. This model uses iterative raytracing to determine the most direct path from radar to target through the …
A Descriptive Study Of Information Operations And Information Warfare Awareness In The United States Air Force, Ryan D. Hollman
A Descriptive Study Of Information Operations And Information Warfare Awareness In The United States Air Force, Ryan D. Hollman
Theses and Dissertations
Information has always been important in military affairs, conflicts, and wars. Information warfare is an important new concept that is emphasized by the significance of computer and information technology. The United States Air Force has educated and trained individuals in information warfare since recognizing the importance of information warfare in 1995. The Air Force Information Warfare Center and the information warfare squadron were also created to address information warfare concerns. Information warfare is important to the entire Air Force. How familiar are Air Force people generally in information warfare? This thesis addresses awareness of information warfare and information operations concepts. …
An Examination Of The United States Air Service's Logistics Operations, Andrew W. Hunt
An Examination Of The United States Air Service's Logistics Operations, Andrew W. Hunt
Theses and Dissertations
This historical study details the U.S. Air Service's logistics operations at home and abroad in an attempt to determine the relationship between the process and more recently established logistic principles. The information in the study was collected through an extensive review of both first hand accounts and historical compilations of the nature of World War I aviation logistics. Information regarding the production of the De Haviland DH-4 and Liberty Engine serve as the primary case examples of the operation of the logistics system. The established principles required for comparison were extracted from the writings of a number of expert military …
The Factors That Motivated American Ground Forces To Fight During Combat In Vietnam, William A. Schum
The Factors That Motivated American Ground Forces To Fight During Combat In Vietnam, William A. Schum
Theses and Dissertations
Many people debate the policies of the United States government with respect to the conduct of the Vietnam War. The war was unpopular, at best, and many argued that our military should not have fought for South Vietnam. So, what compelled American ground forces to fight an atypical enemy? This thesis explores the motivational factors that influenced the military ground forces on a daily basis. Past research conducted on previous wars serves as the guideline for the methodology used. Combat narratives are the data sources and references to motivational factors by the authors are the data. As a whole, the …
An Assessment Of Factors That Affect The Performance Of Air Force O-3 (Captain) Logisticians Working In A Joint Operations Environment, Jeffrey C. Bergdolt, Ty K. Sills
An Assessment Of Factors That Affect The Performance Of Air Force O-3 (Captain) Logisticians Working In A Joint Operations Environment, Jeffrey C. Bergdolt, Ty K. Sills
Theses and Dissertations
Joint operations will likely continue to become more prevalent in the future due to defense spending cuts and the nature of modem warfare. Currently, Air Force O-3 (Captain) logisticians, working in the joint operations environment, receive little if any initial training. Exploratory research, by the authors, indicated that these members felt uncertain about their jobs and how they related to the organization, which has been described in the literature as role ambiguity. Consequently, this research project was designed to determine if AF O-3 logisticians serving in the joint operations environment experience more role ambiguity than their counterparts serving in the …
Feasibility Study On The Use Of The Internet For Traffic Of Unclassified Data, Alexandre L. Guerra, Luiz Gustavo F. P. Silva
Feasibility Study On The Use Of The Internet For Traffic Of Unclassified Data, Alexandre L. Guerra, Luiz Gustavo F. P. Silva
Theses and Dissertations
This research compares two possible networking methods for connecting all Brazilian Air Force Materiel Command units responsible for support and operation of Brazilian Air Force's weapons systems. The network includes the use of dedicated X.25 links, and the use of a virtual Private Network using the Internet (TCP/IP) as the medium of transmission. The Brazilian Air Force Materiel Command, responsible to support operating units over a very large sparse territory, lacks an efficient media of computer communications, which makes it difficult to control the supply chain channels of materiel present in each unit, depots, and warehouses. We studied the network …
Air Force Institute Of Technology Research Report 1997, Air Force Institute Of Technology
Air Force Institute Of Technology Research Report 1997, Air Force Institute Of Technology
AFIT Documents
This report summarizes the research activities of the Air Force Institute of Technology's Graduate School of Engineering and the Graduate School of Logistics and Acquisition Management. It describes research interests and faculty expertise; list student theses/dissertations; identifies research sponsors and contributions; and outlines the procedure for contacting either school.
Calculating A Value For Dominant Battlespace Awareness, Eric A. Beene
Calculating A Value For Dominant Battlespace Awareness, Eric A. Beene
Theses and Dissertations
In times of ever-tightening military budgets, methodologies are required that can compare the contributions of various systems involved in the warfighting process. While many tools are in use that directly measure the effects of greater numbers of enhanced hardware, and even improved processes, no validated methodology exists to measure elements that contribute to Command, Control, Communications, and Computers (C4); Intelligence, Surveillance, and Reconnaissance (ISR); or to analytically compare these elements with more traditional hardware. This thesis develops a methodology for mathematically quantifying awareness in a military command and control (C2) environment. This methodology begins with the Observe-Orient-Decide-Act Loop to show …
Sensitivity Analysis Of Brawler Pilot Skill Levels, Daniel C. Buschor
Sensitivity Analysis Of Brawler Pilot Skill Levels, Daniel C. Buschor
Theses and Dissertations
BRAWLER is a high resolution air to air combat simulation model used for engagement level analyses of few on few air combat. It uses a value driven decision logic to help simulate pilot behavior. In order to account for varied pilot skill levels, BRAWLER has defined three skill levels; Rookie, Pilot, and Ace. A Rookie can track up to three aircraft in its mental model, the Pilot, up to five aircraft, while an Ace has no limit. Further, each skill level varies the amount of time before a known aircraft, which has not been recently observed, is purged from the …
Sensitivity Analysis Of The Thunder Combat Simulation Model To Command And Control Inputs Accomplished In A Parallel Environment, David A. Davies
Sensitivity Analysis Of The Thunder Combat Simulation Model To Command And Control Inputs Accomplished In A Parallel Environment, David A. Davies
Theses and Dissertations
This research had two objectives. The first was to develop a methodology to demonstrate the parallel processing capability provided by Air Force's Aeronautical System's Command (ASC) Major Shared Resource Center (MSRC) and apply that methodology to the SIMAF Proof of Concept project. Secondly, AFSAA/SAAB requested a sensitivity analysis of THUNDER to the modeled command and control (C2) inputs. The power of parallelization can not be overemphasized. The data collection phase of this thesis was accomplished at the MSRC using a script developed to automate the processing of an experimental design, providing the analyst with a launch and leave capability. On …
An Operational Review Of Air Campaign Planning Automation, William R. Haas
An Operational Review Of Air Campaign Planning Automation, William R. Haas
Theses and Dissertations
The air campaign planning process is a complex and dynamic process. Operations research has been applied to this problem to shorten the planning cycle with mixed results. The Joint Force Air Component Commander Planning Tool was developed as an air campaign planning aid. It uses the Conventional Targeting and Effectiveness Model (CTEM) as the force analysis model for master air attack plan (MAAP) planning. This thesis reviews the limitations and assumptions of CTEM and CTEM in JPT from and operational perspective. A new approach to using models in air campaign planning, collaborative planning, is being developed for use with JPT. …
Preliminary Design Of A Joint Simulation, Analysis, And Wargaming Center For The Turkish General Staff, Oguz Okuyucu
Preliminary Design Of A Joint Simulation, Analysis, And Wargaming Center For The Turkish General Staff, Oguz Okuyucu
Theses and Dissertations
This study develops a framework for the design of a Joint Simulation, Analysis, and Wargaming Center (JSAWC). JSAWC is proposed as the primary decision support center for the Turkish General Staff. The complexity of warfare systems and the fog of future wars make military planning, problem solving, and decision making processes difficult to accomplish without using computerized analysis support tools. The proposed JSAWC will use modeling and simulation technology to provide analytical support for Turkish military decision-makers and planners in operations planning, force structuring, and training. An iterative systems engineering process is defined and applied to the primary design of …
Cross-Resolution Combat Model Calibration Using Bootstrap Sampling, Bryan S. Livergood
Cross-Resolution Combat Model Calibration Using Bootstrap Sampling, Bryan S. Livergood
Theses and Dissertations
The US Air Force uses many combat simulation models to assist them in performing combat analyses. BRAWLER is a high-resolution air-to-air combat simulation model used for engagement-level analyses of few-on-few air combat. THUNDER is a low-resolution combat simulation model used for campaign-level analyses of theater-level warfare. BRAWLER is frequently used to ensure that THUNDER air-to-air inputs are valid. This thesis describes the confederation of THUNDER and BRAWLER by clearly showing how one particular BRAWLER output, the effectiveness of a missile type, is transformed into THUNDER air-to-air input data. Since BRAWLER is a stochastic simulation model, it is necessary to replicate …
The One With The Most Information Wins? The Quest For Information Superiority, Stacy M. Clements
The One With The Most Information Wins? The Quest For Information Superiority, Stacy M. Clements
Theses and Dissertations
The escalation of interest in information as a corporate resource is reflected in the military's quest for information superiority. A volume of directives, articles, and doctrine is appearing to meet the unique challenges presented by information as a resource. Discussions of how to achieve information superiority have given rise to investigations of such related concepts as information warfare and information operations, with associated taxonomies and ideas of how to use information capabilities for attack and defense. This thesis examines information superiority and the related concepts, and examines current information technology initiatives in order to discern the characteristics which can aid …
A Representational Approach To Knowledge And Multiple Skill Levels For Broad Classes Of Computer Generated Forces, Larry J. Hutson
A Representational Approach To Knowledge And Multiple Skill Levels For Broad Classes Of Computer Generated Forces, Larry J. Hutson
Theses and Dissertations
Current computer generated forces (CGFs) in the 'synthetic battlespace', a training arena used by the military, exhibit several deficiencies. Human actors within the battlespace rapidly identify these CGFs and defeat them using unrealistic and potentially fatal tactics, reducing the overall effectiveness of this training arena. Simulators attached to the synthetic battlespace host local threat systems, leading to training inconsistencies when different simulators display the same threat at different levels of fidelity. Finally, current CGFs are engineered 'from the ground up', often without exploiting commonalities with other existing CGFs, increasing development (and ultimately training) costs. This thesis addresses these issues by …
A Modeling And Simulation Approach To Characterize Network Layer Internet Survivability, Leif S. King
A Modeling And Simulation Approach To Characterize Network Layer Internet Survivability, Leif S. King
Theses and Dissertations
The Air Force Core Competency of Information Superiority will be achieved in an age of decreasing AF manpower and corporate expertise. Increased AF reliance on COTS solutions, coupled with nearly ubiquitous points of entry to communication networks, create unique challenges in maintaining the Information Superiority edge. The protection of the internet is part of this equation. The internet supports the daily business traffic of the Air Force. Personnel, finance, and supply data flow through its routers. Controlling an adversary's access to our information systems, either the data, or the hardware and software that control the data and transform it into …
Usaf Pilot Perceptions Of Workload Assessment In A Combat Or High-Threat Environment, Kadircan Kottas
Usaf Pilot Perceptions Of Workload Assessment In A Combat Or High-Threat Environment, Kadircan Kottas
Theses and Dissertations
This study analyzed the self-reported survey responses of 219 Air Force Pilots concerning their perceptions of workload assessment in a combat or a high threat environment. The first objective of this study was to determine and compare the combat workload factors of varying importance in combat workload assessment by aircraft and mission type flown. The second objective was to examine the pilots' perception of combat mission inflight workload. A stepwise regression model to predict the pilots' perceptions of inflight workload using pilots' characteristics data was explored. Research conclusion varied among aircraft types. Combat workload items indicated as distractingly important were …
An Analysis Of Unclassified Current And Pending Air Force Information Warfare And Information Operations Doctrine And Policy, Kenneth V. Peifer
An Analysis Of Unclassified Current And Pending Air Force Information Warfare And Information Operations Doctrine And Policy, Kenneth V. Peifer
Theses and Dissertations
This study focused on determining if unclassified current and pending Air Force information warfare and information operations doctrine and policy is moving in the direction it should in terms of being complete, consistent and cohesive based on what has been mandated and studied about information warfare. A model of unclassified current and pending Air Force information warfare and information operations doctrine and policy was examined through criterion-based congruence analysis to make this determination. Investigative questions were developed in reference to the current state of unclassified Air Force information warfare and information operations doctrine and policy. Secondary data analysis was conducted …
Ethical Issues In A Networked Environment, Kristen G. Sallberg
Ethical Issues In A Networked Environment, Kristen G. Sallberg
Theses and Dissertations
The research objective was to provide a preliminary understanding of how USAF computer users perceive the ethical considerations of computer networks and how the USAF is addressing ethical issues of networked environments. A survey was undertaken to explore questions of ethics in the use of information networks. The literature review explored issues of ethics in the private sector and USAF guidance regarding use of official government resources. The sample population consisted of military members stationed at Wright-Patterson Air Force Base Ohio. The responses regarding certain attitudes about behaviors and actions in a networked environment were consistent overall. A significant difference …
Focused Graduate Education: An Invisible But Real Competitive Edge, Roland D. Kankey, Jan P. Muczyk, Neal M. Ely
Focused Graduate Education: An Invisible But Real Competitive Edge, Roland D. Kankey, Jan P. Muczyk, Neal M. Ely
Faculty Publications
The future mission of the Air Force will be diverse and complex. Advanced technology will play an increasingly prominent role; a smaller force must accomplish more. To support this mission, our acquisition corps must be intellectually capable, well educated and trained. Focused graduate education will be essential to sustain this effort.
A Comparison Of Contracts Involving The Privatization Of Newark Afb And The Naval Air Warfare Center-Indianapolis, James P. Valley
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 …
An Analysis Of Tactical Military Airlift, James H. Donoho
An Analysis Of Tactical Military Airlift, James H. Donoho
Theses and Dissertations
This study examines tactical military airlift operations conducted during three historical battles - Stalingrad, Dien Bien Phu, and Khe Sanh. Aspects of tactical military airlift operations are identified from these scenarios. The list of important issues that results can be considered when employing tactical military airlift in the future. Using inductive reasoning, tactical military airlift operations in each scenario, and their success or failure, are examined to develop a pattern for recognizing and describing similar situations in the future. Experiences at Stalingrad, Dien Bien Phu, and Khe Sanh indicated that there are nine elements that should be considered when employing …