| Estimating Bird / Aircraft Collision Probabilities and Risk Utilizing Spatial Poisson Processes |
10 Jun 2012 |
89 pages |
| Authors:
Brady J Vaira; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
|
 | Aircraft collisions with avian species are a serious safety problem as well as a serious economic issue. Aircraft / bird strikes have resulted in 33 fatalities, the loss of 39 aircraft, and damages to aircraft in excess of $820M for the United States Air Force. The objective of this paper is to create a closed form mathematical model that estimates the probability of a bird / aircraft collision and provides ... |
|
| Intelligence Support to Supply Chain Risk Management |
Jun 2012 |
78 pages |
| Authors:
Charles L Carter; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
|
| The purpose of this research was to improve defense supply chain risk management processes through better intelligence integration. To this end, this research sought to capture the present state of academic and Department of Defense (DoD) thought regarding supply chain resiliency and risk management through an extensive review of current academic and DoD literature regarding supply chain risk management and intelligence doctrine. This review established the importance of supply chain ... |
|
| Critical Elements and Needs for Nuclear Weapons Maintenance: A Delphi Study |
Jun 2012 |
82 pages |
| Authors:
Craig S Bailey; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
|
| From the end of the Cold War in the early 1990s thru 2007, the focus and attention given to the Air Force's nuclear mission noticeably declined. The nuclear readiness of organizations, personnel, policies, procedures and processes all gradually deteriorated culminating in two high profile incidents which recealed the drastic state of degradation. These incidents led to numerous high level investigations and studies, and resulted in major changes for the Air ... |
|
| Avian Radar - Is It Worth the Cost? |
Jun 2012 |
55 pages |
| Authors:
Robert F Ehasz; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
|
| Major Ehasz explored the correlations between bird strike data at United States Air Force (USAF) airfields prior to Avian Radar installation and post Avian Radar installation in order to perform a Business Case Analysis (BCA) to help guide future potential purchases of Avian Radar. He defined the scope of the bird strike problem, explained the associated costs, explored current mitigation efforts leading up to Avian Radar, performed statistical analysis of ... |
|
| Emulating Industrial Control System Field Devices Using Gumstix Technology |
Jun 2012 |
122 pages |
| Authors:
Dustin J Berman; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
|
| Industrial Control Systems (ICS) have an inherent lack of security and situational awareness capabilities at the field device level. Yet these systems comprise a significant portion of the nation's critical infrastructure. Currently, there is little insight into the characterization of attacks on ICS. Stuxnet provided an initial look at the type of tactics that can be employed to create physical damage via cyber means. The question still remains, however, as ... |
|
| An Application of Con-Resistant Trust to Improve the Reliability of Special Protection Systems within the Smart Grid |
Jun 2012 |
84 pages |
| Authors:
Crystal M Shipman; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
|
| This thesis explores an application of a con-resistant trust mechanism to improve the performance of communications-based special protection systems to further enhance their effectiveness and resiliency. New initiatives in the energy sector are paving the way for the emergent communications-based smart grid technology. Smart grids incorporate modern technologies in an effort to be more reliable and efficient. However, with the benefits of this new technology comes added risk. This research ... |
|
| Enhancing Trust in the Smart Grid by Applying a Modified Exponentially Weighted Averages Algorithm |
Jun 2012 |
87 pages |
| Authors:
Andrew T Kasperek; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
|
| The main contribution of this thesis is the development and application of a modified Exponentially Weighted Moving Algorithm (EWMA) algorithm, and its ability to robustly function in the face varying numbers of bad (malicious or malfunctioning) Special Protection System (SPS) nodes. Simulation results support the use of the proposed modified EWMA reputation based trust module in SPSs within a smart grid environment. This modification results in the ability to easily ... |
|
| Rapid Delivery of Cyber Capabilities: Evaluation of the Requirement for a Rapid Cyber Acquisition Process |
Jun 2012 |
76 pages |
| Authors:
Matt J Butler; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
|
| The Department of Defense has a standardized acquisition construct for delivering capabilities in the land, air, sea and space domains. Recently, cyberspace was identified as a warfighting domain; however, the unique attributes of the cyberspace domain require a more rapid process to deliver capabilities to the warfighter. Indeed, from initial requirements to fielding of the F/A-22 aircraft was approximately 20 years; this timeframe is not acceptable for cyberspace capabilities. To ... |
|
| The Effects of Supply Chain Orientation, Supply Chain Management, and Collaboration on Perceived Firm Performance |
Jun 2012 |
69 pages |
| Authors:
Jodi M Tinney; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
|
| The purpose of this research is to examine the relationship among supply chain orientation, supply chain management, and collaboration, and the effects of these concepts on firm performance. These concepts are of great interest to numerous firms and organizations that have adopted a supply chain management paradigm in managing their operations. As established in previous research, however, there is a distinction between supply chain orientation and supply chain management. Supply ... |
|
| Risk Assessment Planning for Airborne Systems: An Information Assurance Failure Mode, Effects and Criticality Analysis Methodology |
Jun 2012 |
67 pages |
| Authors:
Charles J Middleton; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
|
| Increasingly in recent times, aircraft are built with communications links to external participants. These communications links may in some cases be susceptible to degradation or attack, which may then lead to safety of flight or mission effectiveness risks. This project examines risk assessment of the information assurance and security of newly developed airborne systems. First, an investigation of the past failures of the security of other networked systems is examined ... |
|
| Worldwide Express: Exploiting Existing Contract Provisions to Maximize Savings |
Jun 2012 |
63 pages |
| Authors:
Daniel M Hervas; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
|
| Commercial carriers have become a mission essential component of the Defense Transportation System (DTS). In order to improve DTS performance and better support warfighters, the Department of Defense has continually explored methods to enhance services obtained from commercial carriers. Worldwide Express (WWX) is one such initiative. United States Transportation Command (TRANSCOM) implemented WWX in an effort to focus on core competencies, maximize a shrinking organic airlift fleet and capitalize on ... |
|
| Time Series Forecasting of Airlift Sustainment Cargo Demand |
Jun 2012 |
95 pages |
| Authors:
Daniel S DeYoung; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
|
| Forecasting demand for airlift of sustainment cargo is an important function for logistics planners. For the civil reserve air fleet participants (CRAF), having a useful long-range forecast enables them to make business decisions to maximize profit and manage their fleets. Because the DoD relies on CRAF for much of its steady-state and wartime surge requirements, it is important for these civilian enablers to stay financially healthy in what has become ... |
|
| Simulation Modeling and Analysis of the Impact of Individual Mobility Augmentee Loss at the Tanker Airlift Control Center |
Jun 2012 |
77 pages |
| Authors:
Megan A Leiter; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
|
| The Tanker Airlift Control Center (TACC) operates as the execution arm for Air Mobility Command's Global Reach mission. The Command and Control Directorate (XOC) monitors the execution of missions tasked to the 18th Air Force. Approximately 70% of the personnel on the operations floor are considered Individual Mobility Augmentees (IMA). Adjustments in manpower, specifically the loss of IMAs, at the TACC/XOCG may impact their responsiveness to mission deviations. This research ... |
|
| Modeling the 2008 Manning Study for the 618th Tanker Airlift Control Center (TACC) |
Jun 2012 |
31 pages |
| Authors:
Nathan R Purtle; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
|
| In October of 2008, a Capability-Based Manpower Standard report was released for the 618th Tanker Airlift Control Center (TACC). This report describes each task and its applicable man-hours for every department in the TACC. Depending on how many missions are planned and the number of missions that are actually executed, this gives each department an idea of how many man-hours (people) it needs to accomplish its mission. Using the 2008 ... |
|
| A Performance Analysis of the Optimized Link State Routing Protocol Using Voice Traffic Over Mobile Ad Hoc Networks |
22 Mar 2012 |
126 pages |
| Authors:
Andre Wolf; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
|
| Mobile ad hoc networks (MANETs) have grown in popularity over the past decade and are increasingly considered for time-sensitive multimedia applications. The impact of various routing protocols on voice traffic using different IEEE 802.11 extensions has been investigated via analytical models, simulations and experimental test beds. Many studies determined that optimized link state routing (OLSR) is a suitable routing protocol to support voice over internet protocol (VoIP) conversations. This research ... |
|
| Passive Multistatic Radar Imaging using an OFDM Based Signal of Opportunity |
22 Mar 2012 |
106 pages |
| Authors:
Matthew B Rapson; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
|
| This paper demonstrates a proof of concept in using an OFDM-based signal of opportunity for SAR imaging purposes within a passive, multistatic radar construct. Two signal processing methods have been proposed to create phase history data. The same methods are applied in both a simulated software model and an experimental data collection environment to produce simulated SAR images using the CBP imaging algorithm. The images generated from both the experimental ... |
|
| Computer Aided Multi-Data Fusion Dismount Modeling |
22 Mar 2012 |
82 pages |
| Authors:
Juan L Morales; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
|
| Recent research efforts strive to address the growing need for dismount surveillance, dismount tracking and characterization. Current work in this area utilizes hyperspectral and multispectral imaging systems to exploit spectral properties in order to detect areas of exposed skin and clothing characteristics. Because of the large bandwidth and high resolution, hyperspectral imaging systems pose great ability to characterize and detect dismounts. A multi-data dismount modeling system where the development and ... |
|
| Target Classification of Canonical Scatterers Using Classical Estimation and Dictionary Based Techniques |
22 Mar 2012 |
221 pages |
| Authors:
II Hammond Glenn B; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
|
| This research effort will utilize a hierarchical dictionary-based approach for canonical shape classification within measured synthetic aperture radar (SAR) phase history data. This primary goal of this research is to develop an efficient framework for dictionary based SAR feature extraction using modi ed 3-D radar scattering models. Previous work in this area relies on maximum likelihood (ML) estimation and similar approaches to extract shapes using 2-D signal models. We include ... |
|
| Determining Angular Frequency from Video with a Generalized Fast Fourier Transform |
22 Mar 2012 |
48 pages |
| Authors:
Lindsay N Smith; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
|
| Suppose we are given a video of a rotating object and suppose we want to determine the rate of rotation solely from the video itself and its known frame rate. In this thesis, we present a new mathematical operator called the Geometric Sum Transform (GST) that can help one determine the angular frequency of the object in question. The GST is a generalization of the discrete Fourier transform (DFT) and ... |
|
| Comparative Statistical Analysis of Auroral Models |
22 Mar 2012 |
119 pages |
| Authors:
Cory T Lane; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
|
| The location of the equatorward boundary of the auroral oval provides an appropriate means to measure the accuracy of auroral models. In this study, the equatorward boundary is represented by the location at which the energy flux data measured by DMSP satellites exceeds 0.4 erg/cm2/s. The MLAT coordinates obtained from more than 4,000 orbits through the polar region of the Northern Hemisphere comprise the data set used to compare to ... |
|
| Field Emission of Thermally Grown Carbon Nanostructures on Silicon Carbide |
22 Mar 2012 |
182 pages |
| Authors:
Jonathon M Campbell; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
|
| CNTs are known to be excellent field emitter due to their unique physical and electrical properties. Because of their semi-metallic nature, CNT do not suffer the thermal runaway found in metallic emitters, and their near one-dimension shape make them an ideal emission sources. CNTs growth by thermal decomposition of silicon carbide does not utilize a catalyst, therefore relatively defect free. One drawback to this method, however is that the CNT ... |
|
| FDTD Simulation of Novel Polarimetric and Directional Reflectance and Transmittance Measurements from Optical Nano- and Micro-Structured Materials |
22 Mar 2012 |
110 pages |
| Authors:
Spencer R Sellers; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
|
| The basic physics of nano-/micro-structured materials must be categorized through measurements and simulation to fully understand their scatter dependence on polarization and angle on incidence before they can be considered for war fighter applications. The off-normal incidence and polarization dependant scatter for a guided-mode resonance filter (GMRF) and a surface plasmonic polariton (SPP) extraordinary transmission filter is measured. The measurements are compared to finite-difference time domain (FDTD) simulations. The GMRF ... |
|
| A High Bandwidth Non-Destructive Method for Characterizing Simple Media |
22 Mar 2012 |
74 pages |
| Authors:
Matthew L Szuster; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
|
| The relative complex permittivity can be extracted with time domain data from a perfect electrical conductor (PEC) backed sample of a low-loss, non-dispersive dielectric using dual ridged waveguide aperture probes with attached PEC flange plates of the same geometry and different dimensions. The temporal domain measurement of interest is the ability to detect the reflection from the edge of the flange plate in the parallel region created by the flange ... |
|
| Characterization of a Hyperspectral Chromotomographic Imaging Ground System |
22 Mar 2012 |
122 pages |
| Authors:
Chad B Su'e; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
|
| A field-deployable hyperspectral chromotomographic imager has been developed and tested as a risk-reduction prototype to assist design of a space-based system. The instrument uses a high-speed video camera looking through a rotating direct-vision prism to simultaneously observe the full field of view in all visible wavelength channels. The chromotomographic process multiplexes the spectral and spatial so an advanced reconstruction algorithm is required to separate the spectral channels. A physics-based model ... |
|
| Durability of MWCNT Composites under Electron and Neutron Irradiation |
22 Mar 2012 |
108 pages |
| Authors:
Quan T Lu; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
|
| Electromagnetic interference shielding effectiveness and conductive properties of carbon nanotube containing composites intended for use as satellite surface materials have been investigated following electron and neutron irradiation. The MWCNT composites were irradiated to fluence levels of 1016 electrons/cm2 with 500 keV electrons. Increase in EMI-SE and conductivity was observed following electron irradiation in two of the samples. The sample with alternating layers of MWCNT and glass had a decrease in ... |
|
| Integration, Testing, and Validation of a Small Hybrid-Electric Remotely-Piloted Aircraft |
22 Mar 2012 |
282 pages |
| Authors:
Joseph K Ausserer; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
|
| Parallel hybrid-electric technology offers a wide variety of new mission capabilities including low-observable loiter operations and increased fuel efficiency for small remotely-piloted aircraft. This research focused on the integration, validation, and testing of a hybrid-electric propulsion system consisting of commercially available components to fabricate a small remotely-piloted aircraft capable of extended low-observable operation. Three novel aspects contributed to the success of the design: optimization of the propulsive components to the ... |
|
| Empirical Characterization of Unconstrained Tape Spring Deployment Dynamics |
22 Mar 2012 |
156 pages |
| Authors:
Daniel M Williams; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
|
| Satellite cost and mission capability are very sensitive to mass requirements. Mass or volume savings in one component will either lower total spacecraft mass, or provide greater margin for design error in other components. Solar arrays and antennas in particular are often driven by launch vehicle volume constraints instead of mission needs. Deployable structures provide more on-orbit area for both solar arrays and antennas, while occupying less space during launch. ... |
|
| Boundary Layer Measurements in the Trisonic Gas-dynamics Facility Using Particle Image Velocimetery with CO2 Seeding |
22 Mar 2012 |
109 pages |
| Authors:
Daniel B Wolfe; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
|
| Particle image velocimetry (PIV) is utilized with solid carbon dioxide (CO2) seeding material to conduct boundary layer measurements in the test section of the Air Force Research Laboratory?s Trisonic Gas-dynamics Facility (TGF), which has a 24 inch by 24 inch cross-section. Freestream velocity was set at Mach 0.3, Mach 0.5, or Mach 0.8 while stagnation pressure ranged from 500 to 2400 pounds per square foot (psf). High pressure liquid CO2 ... |
|
| Development and Testing of a Rotating Detonation Engine Run on Hydrogen and Air |
22 Mar 2012 |
84 pages |
| Authors:
Jason C Shank; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
|
| Rotating detonation engines (RDEs) have the potential for greater efficiencies over conventional engines by utilizing pressure gain combustion. A new modular RDE (6 in diameter) was developed and successfully run on hydrogen and standard air. The RDE allows for variation of injection scheme and detonation channel widths. Tests provided the operational space of the new RDE as well as characterized detonation unsteadiness. It was found that a smaller equivalence ratio ... |
|
| Determination of Effective Crossover Location and Dimensions for Branched Detonation in a Pulsed Detonation Engine |
22 Mar 2012 |
111 pages |
| Authors:
II Camardo Louis A; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
|
| A study is presented of the optimal crossover duct location and width to obtain consistent branched detonation transition from one detonation tube to another. On a Pulsed Detonation Engine (PDE) with detonation branching, the duct location at which the detonation crosses from one (primary) tube to a branched (secondary) tube impacts the number of successful detonations. In this paper, a comparison is made of the effects of the location and ... |
|
| Cooperative Localization on Computationally Constrained Devices |
22 Mar 2012 |
98 pages |
| Authors:
II Cicale Randy S; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
|
| Cooperative localization is a useful way for nodes within a network to share location information in order to better arrive at a position estimate. This is handy in GPS contested environments (indoors and urban settings). Most systems exploring cooperative localization rely on special hardware, or extra devices to store the database or do the computations. Research also deals with specific localization techniques such as using Wi-Fi, ultra-wideband signals, or accelerometers ... |
|
| C-5M Super Galaxy Utilization with Joint Precision Airdrop System |
22 Mar 2012 |
146 pages |
| Authors:
Michael T Weitz; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
|
| The purpose of this research was to determine the viability of utilizing the Joint Precision Airdrop System with the C-5M Super Galaxy weapon system. Specifically, this thesis sought research the ability of the C-5M to use the Joint Precision Airdrop System and to answer four main research questions addressing a cost benefit analysis between the C-5M Super Galaxy and the C-17 Globemaster III. The research questions were answered through a ... |
|
| The Effect of Supply Chain Management Processes on Competitive Advantage and Organizational Performance |
22 Mar 2012 |
111 pages |
| Authors:
Ronald M Salazar; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
|
| One of the most significant changes in the paradigm of modern business management is that individual businesses no longer compete as solely autonomous entities, but rather as supply chains. In this emerging competitive environment, the ultimate success of the business will depend on management?s ability to integrate the company?s intricate network of business relationships. Effective supply chain management (SCM) has become a potentially valuable way of securing competitive advantage and ... |
|
| Improvements to Optical Communication Capabilities Achieved through the Optical Injection of Semiconductor Lasers |
22 Mar 2012 |
176 pages |
| Authors:
Timothy P Locke; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
|
| Optically injection locked lasers have shown significant improvement in the modulation capabilities of directly modulated lasers. This research creates a direct-modulated optical communications system to investigate the bit-rate distance improvements achievable using optically injected Fabry-P?t laser diodes. The injection strength and detuning frequency of the injection signal was varied to determine their impact on the optical communication link?s characteristics. This research measured a 25 fold increase in bit-rate distance product ... |
|
| Impact of Self-Reported Biases and Familiarity in a Baggage Screening Context |
22 Mar 2012 |
87 pages |
| Authors:
Scott W Halwes; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
|
| A common assumption is that items that evoke strong emotions are more easily recognized than items that do not evoke strong emotions (Bessette-Symons, 2008). For example, items such as guns or knives may evoke strong emotions within some people, and it may be presumed that these items may be more easily recognized by people that have strong emotions associated with them. If this is true, then perhaps these people would ... |
|
| Methane Dual Expander Aerospike Nozzle Rocket Engine |
22 Mar 2012 |
131 pages |
| Authors:
Michael D Moen; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
|
| The Air Force Institute of Technology (AFIT), working to meet requirements set by the Air Force Research Laboratory's Next Generation Engine (NGE) initiative, is developing upper stage rocket models. The current path of investigation focuses on combining a dual expander cycle with an aerospike nozzle, or the Dual Expander Aerospike Nozzle (DEAN) using methane fuel. The design process will rely heavily on AFIT's previous work, which focused on the development ... |
|
| Trajectory Control and Optimization for Responsive Spacecraft |
22 Mar 2012 |
136 pages |
| Authors:
Costantinos Zagaris; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
|
| The concept of responsive space has been gaining interest, and growing to include systems that can be re-tasked to complete multiple missions within their lifetime. The purpose of this study is to develop an algorithm that produces a maneuver trajectory that will cause a spacecraft to arrive at a particular location within its orbit earlier than expected. The time difference, delta t, is used as a metric to quantify the ... |
|
| Improving Effectiveness of Monetary Weapon Systems in Afghanistan |
22 Mar 2012 |
85 pages |
| Authors:
Seth M Lorimer; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
|
| Tenuous political and economic times call for increased oversight and improved results from military counterinsurgency programs in Afghanistan, programs that provide agile non-kinetic weapons, critical for commanders fighting in today's asymmetric battle space. This paper proposes a decision tool for construction projects executed under the Commanders Emergency Response Program, designed to meet the changing demands of fighting an amorphous insurgency among dynamic systems of stakeholders. The research first conducted a ... |
|
| Turnover Intentions: A Qualitative Analysis of Comments from Air Force Civil Engineering Company Grade Officers |
22 Mar 2012 |
157 pages |
| Authors:
T J Gabrielson; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
|
| Voluntary turnover is a concern for the military and many other organizations from a financial and performance standpoint. This study applied grounded theory to code and network comments provided by CE officers in 2010. The results of this study found the most influential construct that predicts turnover intentions to be the relationship of OPSTEMPO influencing interrole conflict. This conflict is increased by the workload at home station due to under ... |
|
| Detector Design Considerations in High-Dimensional Artificial Immune Systems |
22 Mar 2012 |
131 pages |
| Authors:
Jason M Bindewald; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
|
| This research lays the groundwork for a network intrusion detection system that can operate with only knowledge of normal network traffic, using a process known as anomaly detection. Real-valued negative selection (RNS) is a specific anomaly detection algorithm that can be used to perform two-class classification when only one class is available for training. Researchers have shown fundamental problems with the most common detector shape, hyperspheres, in high-dimensional space. The ... |
|
| The Moderating Effect of Psychological Empowerment on the Relationship between Network Centrality and Individual Job Performance |
22 Mar 2012 |
64 pages |
| Authors:
David A Washington; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
|
| The purpose of this research was to identify the effect of psychological empowerment (PE) on social network location and individual performance. This study sought to test three hypotheses, which were introduced through a comprehensive literature review, regarding the relationships between social network centrality and individual job performance. Research has indicated a positive relationship between network centrality and performance; however, other research suggests performance can be better predicted by including motivation ... |
|
| Security Verification of Secure MANET Routing Protocols |
22 Mar 2012 |
108 pages |
| Authors:
Matthew F Steele; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
|
| Secure mobile ad hoc network (MANET) routing protocols are not tested thoroughly against their security properties. Previous research focuses on verifying secure, reactive, accumulation-based routing protocols. An improved methodology and framework for secure MANET routing protocol verification is proposed which includes table-based and proactive protocols. The model checker, SPIN, is selected as the core of the secure MANET verification framework. Security is defined by both accuracy and availability: a protocol ... |
|
| Integration of Cold Atom Interferometry INS with Other Sensors |
22 Mar 2012 |
102 pages |
| Authors:
Aaron Canciani; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
|
| Inertial navigation systems (INS) using cold-atom interferometry are currently under development, and sensors in these systems are expected to be several orders of magnitude more ccurate than current navigation grade sensors. This signi cant increase in accuracy motivates the need to explore how these high accuracy inertial navigation systems can be integrated with other sensors. This research focuses on methods of integrating cold atom interferometry INS with conventional navigation grade ... |
|
| Surveillance versus Reconnaissance: An Entropy Based Model |
22 Mar 2012 |
79 pages |
| Authors:
Tamilyn S Dismukes; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
|
| With the advancing capabilities of Intelligence, Surveillance, and Reconnaissance (ISR) assets and sensors, effective utilization of these resources continues to pose a challenge to military decision makers. The methodology developed explores allocation of ISR assets while balancing detection of new targets versus surveillance of already detected targets using entropy as a Measure of Effectiveness (MOE). Scenarios with an unknown number of static and moving targets in a bounded geographical region ... |
|
| Impact of Trench and Ramp Film Cooling Designs to Reduce Heat Release Effects in a Reacting Flow |
22 Mar 2012 |
149 pages |
| Authors:
Michael R DeLallo; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
|
| Increasing combustor fuel-air ratios are a recent area of concern in gas turbine film cooling due to the potential for heat release on the surface of film-cooled components. This investigation compared four different cooling designs on their heat release potential: namely fanned, normal and radial trenched, and ramped. Measurements of heat flux to the downstream surface, when subjected to a reacting mainstream flow, provide a qualitative comparison between the four ... |
|
| Time-Valued-Technology: A Light-Emitting Diode Case Study for Determining Replacement Strategy for High Technology Infrastructure Items |
22 Mar 2012 |
75 pages |
| Authors:
Kevin Ochs; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
|
| Infrastructure projects have typically involved long-term investments in relatively mature technologies characterized by stable performance and cost. However, with the ever-increasing rate of technological innovation, an increasing number of potential infrastructure investments involve a decision to replace a traditional technology with a rapidly evolving technology. In such circumstances, it is possible to reap significant performance or cost advantages through near-term replacement. However, this rapid adoption strategy has the potential to ... |
|
| Silicon Carbide Capacitive High Temperature MEMS Strain Transducer |
22 Mar 2012 |
101 pages |
| Authors:
Richard P Weisenberger; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
|
| Air Force Research Lab Air Vehicles directorate performs research on hypersonic vehicles. To verify materials or designs of hypersonic vehicles, they have a need to measure strain at temperatures exceeding 700 C. Strain sensors have the ability to measure strain. Strain is the deformation of materials due to internal stresses in a material. Internal stresses occur when a material is subjected to a force. Traditional strain sensors use Piezoresistive effects ... |
|
| The Effect of Multiple Interventions on Environmental Attitudes and Behaviors |
22 Mar 2012 |
106 pages |
| Authors:
Jeremy P Kinne; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
|
| New federal mandates require federal entities to reduce resource usage across the board. Additionally, commercial enterprises are evaluating methods of reducing resource consumption to reduce costs and become more ecologically friendly. In response, researchers have begun to evaluate the intentions and behaviors of individuals to determine how to encourage individual participation in reduction methods. This study used a quasi-experimental design of non-equivalent groups to evaluate the effects of Computer Based ... |
|
| Creep of Hi-Nicalon S Ceramic Fiber Tows at Elevated Temperature in Air and in Steam |
22 Mar 2012 |
121 pages |
| Authors:
Benjamin R Steffens; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
|
| Structural aerospace components require materials to have superior long-term mechanical properties that can withstand severe environmental conditions, such as high temperatures, high pressures and moisture, whilst enduring the loads they are designed for. Ceramic-matrix composites (CMCs) are capable of maintaining excellent strength and creep resistance at high temperatures, which make them attractive candidate materials for aerospace applications, particularly in propulsion. Silicon Carbide (SiC) ceramic fibers have been used as constituent ... |
|
| Discrete Event Simulation of Distributed Team Communication |
22 Mar 2012 |
58 pages |
| Authors:
Travis J Pond; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
|
| As the United States Department of Defense continues to increase the number of Remotely Piloted Aircraft (RPA) operations overseas, improved Human Systems Integration becomes increasingly important. RPA systems rely heavily on distributed team communications determined by systems architecture. Two studies examine the effects of systems architecture on operator workload of US Air Force MQ-1/9 operators. The rst study ascertains the effects of communication modality changes on mental workload using the ... |
|
Reports by Corporate Author
