Open Access. Powered by Scholars. Published by Universities.®
- Discipline
-
- Engineering (650)
- Physical Sciences and Mathematics (299)
- Operations Research, Systems Engineering and Industrial Engineering (260)
- Computer Sciences (202)
- Business (152)
-
- Operational Research (132)
- Electrical and Computer Engineering (129)
- Aerospace Engineering (122)
- Social and Behavioral Sciences (88)
- Computer Engineering (70)
- Systems Engineering (56)
- Aviation (52)
- Information Security (50)
- Operations and Supply Chain Management (48)
- Other Operations Research, Systems Engineering and Industrial Engineering (48)
- Signal Processing (43)
- Public Affairs, Public Policy and Public Administration (42)
- Digital Communications and Networking (38)
- Electrical and Electronics (36)
- Human Resources Management (36)
- Navigation, Guidance, Control and Dynamics (34)
- Physics (32)
- Education (29)
- Civil and Environmental Engineering (27)
- Medicine and Health Sciences (23)
- Defense and Security Studies (22)
- Training and Development (21)
- Management and Operations (20)
- Statistics and Probability (19)
- Applied Mathematics (18)
- Keyword
-
- #antcenter (70)
- Decision making (30)
- Computer networks--Security measures (24)
- Information warfare (21)
- Computer security (20)
-
- Air Force research (17)
- Drone aircraft (17)
- CRADA (16)
- Research funding (16)
- Sponsorship (16)
- AFIT/CSE (13)
- AFIT/SY (13)
- Systems engineering case study (13)
- Command and control systems (11)
- Machine learning (11)
- Target acquisition (11)
- Computer vision (10)
- Computer war games (10)
- Drone aircraft--Control systems (10)
- Global Positioning System (10)
- RR (10)
- Collaboration (9)
- #csra (8)
- Artificial intelligence (8)
- Combat--Computer simulation (8)
- Decision support systems (8)
- Decontamination (8)
- ENR (8)
- Wireless communication systems (8)
- Computer networks (7)
- Publication Year
- Publication
- Publication Type
Articles 631 - 660 of 1073
Full-Text Articles in Entire DC Network
Development Of A Screening Model For Design And Costing Of An Innovative Tailored Granular Activated Carbon Technology To Treat Perchlorate-Contaminated Water, William C. Powell
Development Of A Screening Model For Design And Costing Of An Innovative Tailored Granular Activated Carbon Technology To Treat Perchlorate-Contaminated Water, William C. Powell
Theses and Dissertations
Perchlorate contamination of drinking water is a problem that has recently gained national attention. The purpose of this research was to develop a tool to predict the cost and performance of tailored granular activated carbon (T-GAC), an innovative technology to treat perchlorate-contaminated water. The ability to predict cost and performance is essential to promote transfer and commercialization of innovative technologies. This study investigated how data obtained from small-scale laboratory tests could be applied to predict cost and performance of a full-scale T-GAC system to treat perchlorate-contaminated water. A technology model was developed using GAC design principles and using a multi-component …
The Effects Of Career Broadening On Leadership Development, S. David Walker
The Effects Of Career Broadening On Leadership Development, S. David Walker
Theses and Dissertations
The goal of this research was to improve the Air Force’s knowledge of the effects of career broadening jobs on the leadership development of its officer corps. Specifically, the study sought to find significant relationships between incidents of career broadening in the officers’ background and their odds of being selected for promotion and in-residence professional military education (PME). Selection under these two areas is considered recognition of an officer’s ability to handle more responsibility and greater leadership challenges. Therefore, they are logical assessments of an officer’s leadership development. Duty histories of officers who met the Major, Lieutenant Colonel, and Colonel …
A Modular Mixed Signal Vlsi Design Approach For Digital Radar Applications, Brian M. Brakus
A Modular Mixed Signal Vlsi Design Approach For Digital Radar Applications, Brian M. Brakus
Theses and Dissertations
This study explores the idea of building a library of VHDL configurable components for use in digital radar applications. Configurable components allows a designer to choose which components he or she needs and configures those components for a specific application. By doing this, design time for ASICs and FPGAs is shortened because the components are already designed and tested. This idea is demonstrated with a configurable dynamic pipelinable fast fourier transform. Many FFT implementations exist, but this implementation is both configurable and dynamic. Pre-synthesis customization allows the FFT to be tailored to almost any DSP application, and the dynamic property …
Optimal Sensor Threshold Control And The Weapon Operating Characteristic For Autonomous Search And Attack Munitions, Roland A. Rosario
Optimal Sensor Threshold Control And The Weapon Operating Characteristic For Autonomous Search And Attack Munitions, Roland A. Rosario
Theses and Dissertations
This Thesis considers the optimal employment of a wide area search munition in a battlespace where a target is known to be uniformly distributed among false targets which are Poisson distributed. The Poisson distribution's parameter is obtained from readily available battlespace intelligence. This work formulates and solves the optimal control problem for deriving the optimal sensor threshold schedule in order to maximize the probability of attacking the target during the battlespace sweep while constraining the probability of attacking a false target. The efficiency gained by optimally varying the sensor threshold is compared against the performance achieved with a static, optimum …
Multi-Dimensional Classification Algorithm For Automatic Modulation Recognition, Ouail Albairat
Multi-Dimensional Classification Algorithm For Automatic Modulation Recognition, Ouail Albairat
Theses and Dissertations
This thesis proposes an approach for modulation classification using existing features in a more efficient way. The Multi-Dimensional Classification Algorithm (MDCA) treats features extracted from signals of interest as elements with irrelevant identities, hence eliminating any dependence of the classifier on any particular feature. This design enables the use of any number of features, and the MDCA algorithm provides the capability to classify modulations in higher dimensions. The use of multiple features requires an equal number of data dimensions, and thus classification in as high a dimensional space as possible can improve final classification results. Finally, the MDCA algorithm uses …
Professionalism In The Air Force: A Comparative Analysis Of Commissioned Officers With Non-Commissioned Officers, Edward K. Boyd
Professionalism In The Air Force: A Comparative Analysis Of Commissioned Officers With Non-Commissioned Officers, Edward K. Boyd
Theses and Dissertations
Decades ago, military sociologists predicted a rising trend among officers away from traditional institutional military values and toward more economically-based occupational values due to the effects of the transition from a conscription-based military to an all-volunteer force. Subsequent empirical research resulted in data that supports such predictions. More recent researchers have suggested that in addition to the all-volunteer force, an increase on technology may also accelerate the trend toward occupationalism and away from traditional institutional military values and the warrior ethos that typically define successful military organizations. The officer corps may be particularly vulnerable to occupationalism due to increased technical …
Price Vs. Performance: The Value Of Next Generation Fighter Aircraft, John M. Stelly
Price Vs. Performance: The Value Of Next Generation Fighter Aircraft, John M. Stelly
Theses and Dissertations
The United States Department of Defense (DoD) is currently recapitalizing its aging fighter aircraft inventory with the F-22A and F-35. While the DoD may consider cost and performance issues, it does not use a quantitative model that effectively measures the tradeoffs between the two. This thesis constructs a hedonic model of the fighter aircraft market to measure the implicit price on fighter performance characteristics and specifically applies it to next-generation aircraft. Data from 50 aircraft from 1949-present were used to construct two models – one based on procurement costs and one based on research, design, test, and evaluation (RDT&E) costs. …
Use Of Thrust Vectors In Support Of The Cybercraft Initiative, Michael Stevens
Use Of Thrust Vectors In Support Of The Cybercraft Initiative, Michael Stevens
Theses and Dissertations
The CyberCraft Initiative is designing a framework for command and control of future Air Force Cyber-weapon systems, that autonomously operate and defend the Air Force networks and information systems to provide Cyberspace Superiority in support of the defense of the United States. The fundamental research question of the CyberCraft Initiative is "What is required for a commander to trust a CyberCraft to autonomously defend military information systems?" The Trust Vector model is one method of integrating trust into the CyberCraft fleet. Trust Vectors define trust and distrust between agents based on three components; current and historical data, intrinsic knowledge of …
Multi-Dimensional Range Querying Using A Modification Of The Skip Graph, Gregory J. Brault
Multi-Dimensional Range Querying Using A Modification Of The Skip Graph, Gregory J. Brault
Theses and Dissertations
Skip graphs are an application layer-based distributed routing data structure that can be used in a sensor network to facilitate user queries of data collected by the sensor nodes. This research investigates the impact of a proposed modification to the skip graph proposed by Aspnes and Shah. Nodes contained in a standard skip graph are sorted by their key value into successively smaller groups based on random membership vectors computed locally at each node. The proposed modification inverts the node key and membership vector roles, where group membership is computed deterministically and node keys are computed randomly. Both skip graph …
Heuristically Driven Search Methods For Topology Control In Directional Wireless Hybrid Network, Roger L. Garner
Heuristically Driven Search Methods For Topology Control In Directional Wireless Hybrid Network, Roger L. Garner
Theses and Dissertations
Information and Networked Communications play a vital role in the everyday operations of the United States Armed Forces. This research establishes a comparative analysis of the unique network characteristics and requirements introduced by the Topology Control Problem (also known as the Network Design Problem). Previous research has focused on the development of Mixed-Integer Linear Program (MILP) formulations, simple heuristics, and Genetic Algorithm (GA) strategies for solving this problem. Principal concerns with these techniques include runtime and solution quality. To reduce runtime, new strategies have been developed based on the concept of flow networks using the novel combination of three well-known …
Distributed Fault-Tolerant Quality Of Service Routing In Hybrid Directional Wireless Networks, Larry C. Llewellyn Ii
Distributed Fault-Tolerant Quality Of Service Routing In Hybrid Directional Wireless Networks, Larry C. Llewellyn Ii
Theses and Dissertations
This thesis presents a distributed fault-tolerant routing protocol (EFDCB) for QoS supporting hybrid mobile ad hoc networks with the aim of mitigating QoS disruption time when network failures occur. The experimental design presented in this thesis describes 22 experiments aimed at illustrating EFDCB's ability to handle fault-tolerance. The interpreted results show that EFDCB excels over a global rerouting protocol at this challenge which is the goal of this work.
Effective Mobile Routing Through Dynamic Addressing, Heungsoon Park
Effective Mobile Routing Through Dynamic Addressing, Heungsoon Park
Theses and Dissertations
Military communications has always been an important factor in military victory and will surely play an important part in future combat. In modern warfare, military units are usually deployed without existing network infrastructure. The IP routing protocol, designed for hierarchical networks cannot easily be applied in military networks due to the dynamic topology expected in military environments. Mobile ad-hoc networks (MANETs) represent an appropriate network for small military networks. But, most ad-hoc routing protocols suffer from the problem of scalability for large networks. Hierarchical routing schemes based on the IP address structure are more scalable than ad-hoc routing but are …
2006 Annual Report Of The Graduate School Of Engineering And Management, Air Force Institute Of Technology, Office Of Research And Sponsored Programs, Graduate School Of Engineering And Management, Afit
2006 Annual Report Of The Graduate School Of Engineering And Management, Air Force Institute Of Technology, Office Of Research And Sponsored Programs, Graduate School Of Engineering And Management, Afit
AFIT Documents
The Graduate School's Annual Report highlights research focus areas, new academic programs, faculty accomplishments and news, and provides top-level sponsor-funded research data and information.
Identifying Knowledge, Skill, And Ability Requirements For 33sx Officers In Deployed Environments, Douglas M. Simmers
Identifying Knowledge, Skill, And Ability Requirements For 33sx Officers In Deployed Environments, Douglas M. Simmers
Theses and Dissertations
Military operations in the past, present, and future are highly dependent on the timely distribution of accurate information; the only thing really changing is the speed and means of which it is dispersed. As we proceed forward in the information age, technology and the men and women responsible for it will play an ever increasing role in getting the right information in the right place at the right time. As the United States Air Force continues to transform into an ever increasing expeditionary service the knowledge, skills, and abilities of Air Force officers must transform as well to meet the …
An Efficient Metaheuristic For Dynamic Network Design And Message Routing, Robert B. Hartlage
An Efficient Metaheuristic For Dynamic Network Design And Message Routing, Robert B. Hartlage
Theses and Dissertations
The implementation of Net-centric warfare presents major challenges in terms of effectively and efficiently delivering critical information across the Global Information Grid. In many cases, the amount of information requested will exceed the capabilities of the network. One challenge is to dynamically design the network (assign transceivers) to maximize the amount of required information that can be transmitted and the quality of service for those transmissions - to best implement the communications tasking order. The problem is as follows: given a list of required message traffic, to include source, destination, size, and priority, design the network to maximize the delivery …
Updating Optimal Decisions Using Game Theory And Exploring Risk Behavior Through Response Surface Methodology, Jeremy D. Jordan
Updating Optimal Decisions Using Game Theory And Exploring Risk Behavior Through Response Surface Methodology, Jeremy D. Jordan
Theses and Dissertations
This thesis utilizes game theory within a framework for updating optimal decisions based on new information as it becomes available. Methodology is developed that allows a decision maker to change his perceived optimal policy based on available knowledge of the opponents strategy, where the opponent is a rational decision maker or a random component nature. Utility theory is applied to account for the different risk preferences of the decision makers. Furthermore, response surface methodology is used to explore good risk strategies for the decision maker to approach each situation with. The techniques are applied to a combat scenario, a football …
Quantifying Non-Equilibrium In Hypersonic Flows Using Entropy Generation, Ryan W. Carr
Quantifying Non-Equilibrium In Hypersonic Flows Using Entropy Generation, Ryan W. Carr
Theses and Dissertations
The constitutive relations traditionally used for finding shear stress and heat flux in a fluid become invalid in non-equilibrium flow. Their derivation from kinetic theory only demonstrates they are valid only for small deviations from equilibrium. Because it is fundamentally linked to non-equilibrium, entropy generation is used to investigate the limits of the continuum constitutive relations. However, the continuum equations are inherently limited to near equilibrium conditions due to the constitutive relations; thus kinetic theory must be used as a basis for comparison. Direct Simulation Monte Carlo (DSMC), a particle method alternative to continuum methods, is based on kinetic theory …
Investigating Hastily-Formed Collaborative Networks, Joshua S. Campbell, Stanley L. Cooley, Matthew F. Durkin, Brian K. Maddocks
Investigating Hastily-Formed Collaborative Networks, Joshua S. Campbell, Stanley L. Cooley, Matthew F. Durkin, Brian K. Maddocks
Theses and Dissertations
This research explores both the human and technical aspects of the network centric environment in the context of a major disaster or incident of national significance. The National Incident Management System (NIMS) is viewed by the authors as a social network, and an organizational topology is developed to improve its effectiveness. A rapid Network Deployment Kit (RNDK) using commercial off the shelf (COTS) wireless networking technology is also proposed that facilitates immediate NIMS implementation. The integration of logical and technical analyses forms a comprehensive systems engineering proposal to facilitate collaboration in a net-centric environment. It is envisioned that the methodology …
An Evaluation Of Organizational And Experience Factors Affecting The Perceived Transfer Of U.S. Air Force Basic Combat Skills Training, Shirley D. Crow
An Evaluation Of Organizational And Experience Factors Affecting The Perceived Transfer Of U.S. Air Force Basic Combat Skills Training, Shirley D. Crow
Theses and Dissertations
The United States Air Force is in a state of transformation. Due to ongoing operations in Iraq and Afghanistan, the focus of Basic Military Training is shifting to basic combat skills, or the skills needed to survive and operate in a hostile environment. In this study, basic combat skills training was evaluated using a number of training factors that potentially affect trainees’ perception of training transfer, or their ability to apply the skills they learned in training on the job or in a hostile environment. The analysis used structural equation modeling to evaluate the paths between each of the factors …
Analyzing The Interdiction Of Sea-Borne Threats Using Simulation Optimization, Kristen L. Cavallaro
Analyzing The Interdiction Of Sea-Borne Threats Using Simulation Optimization, Kristen L. Cavallaro
Theses and Dissertations
Worldwide, maritime trade accounts for approximately 80% of all trade by volume and is expected to double in the next twenty years. Prior to September 11, 2001, Ports, Waterways and Coastal Security (PWCS) was afforded only 1 percent of United States Coast Guard (USCG) resources. Today, it accounts for nearly 22 percent of dedicated USCG resources. Tactical assessment of resource requirements and operational limitations on the PWCS mission is necessary for more effective management of USCG assets to meet the broader range of competing missions. This research effort involves the development and validation of a discrete-event simulation model of the …
Dynamic Response Of A Collidant Impacting A Low Pressure Airbag, Peter A. Dreher
Dynamic Response Of A Collidant Impacting A Low Pressure Airbag, Peter A. Dreher
Theses and Dissertations
There are many uses of low pressure airbags, both military and commercial. Many of these applications have been hampered by inadequate and inaccurate modeling tools. This dissertation contains the derivation of a four degree-of-freedom system of differential equations from physical laws of mass and energy conservation, force equilibrium, and the Ideal Gas Law. Kinematic equations were derived to model a cylindrical airbag as a single control volume impacted by a parallelepiped collidant. An efficient numerical procedure was devised to solve the simplified system of equations in a manner amenable to discovering design trends. The largest public airbag experiment, both in …
Towards The Development Of A Defensive Cyber Damage And Mission Impact Methodology, Larry W. Fortson Jr.
Towards The Development Of A Defensive Cyber Damage And Mission Impact Methodology, Larry W. Fortson Jr.
Theses and Dissertations
The purpose of this research is to establish a conceptual methodological framework that will facilitate effective cyber damage and mission impact assessment and reporting following a cyber-based information incidents. Joint and service guidance requires mission impact reporting, but current efforts to implement such reporting have proven ineffective. This research seeks to understand the impediments existing in the current implementation and to propose an improved methodology. The research employed a hybrid historical analysis and case study methodology for data collection through extensive literature review, examination of existing case study research and interviews with Air Force members and civilian personnel employed as …
Approximate Analysis Of An Unreliable M/M/2 Retrial Queue, Brian P. Crawford
Approximate Analysis Of An Unreliable M/M/2 Retrial Queue, Brian P. Crawford
Theses and Dissertations
This thesis considers the performance evaluation of an M/M/2 retrial queue for which both servers are subject to active and idle breakdowns. Customers may abandon service requests if they are blocked from service upon arrival, or if their service is interrupted by a server failure. Customers choosing to remain in the system enter a retrial orbit for a random amount of time before attempting to re-access an available server. We assume that each server has its own dedicated repair person, and repairs begin immediately following a failure. Interfailure times, repair times and times between retrials are exponentially distributed, and all …
Patterns Of War Termination: A Statistical Approach, Paul D. Robinson Ii
Patterns Of War Termination: A Statistical Approach, Paul D. Robinson Ii
Theses and Dissertations
This research uses an advanced statistical technique to expand upon the current understanding of war termination. Specifically, this thesis addressed questions concerning the most relevant factors toward predicting both the outcomes of interstate wars and the winners of intrastate and extra-systemic wars, within the limitations of the available data. Open-source war data from the Correlates of War Project was analyzed using both binary and multinomial logistic regression techniques. While the Correlates of War Project did not necessarily focus its data collection efforts on those variables historically associated with war termination, it did provide a sufficient number of variables with which …
Mathematical Programming Model For Fighter Training Squadron Pilot Scheduling, Thomas M. Newlon
Mathematical Programming Model For Fighter Training Squadron Pilot Scheduling, Thomas M. Newlon
Theses and Dissertations
The United States Air Force fighter training squadrons build weekly schedules using a long and tedious process. Very little of this process is automated and optimality of any kind is nearly impossible. Schedules are built to a feasible condition only to be changed with consideration of Wing level requirements. Weekly flying schedules are restricted by requirements for crew rest, days since a pilot's last sortie, sorties in the last 30 days, and sorties in the last 90 days. By providing a scheduling model to the pilot charged with creating the schedule, valuable pilot hours could be spent in the cockpit, …
Classifying Failing States, Nathan E. Nysether
Classifying Failing States, Nathan E. Nysether
Theses and Dissertations
The US is heavily involved in the first major war of the 21st Century -- The Global War on Terror (GWOT). As with any militant group, the foundation of the enemy's force is their people. There are two primary strategies for defeating the terrorists and achieving victory in the GWOT. First, we must root out terrorists where they live, train, plan, and recruit and attack them militarily. Second, we must suffocate them by cutting off the supply of new soldiers willing to choose aggression or even death over their current life. This thesis helps to achieve these objectives by applying …
A Future-Based Risk Assessment For The Survivability Of Long Range Strike Systems, William D. Heuck Jr.
A Future-Based Risk Assessment For The Survivability Of Long Range Strike Systems, William D. Heuck Jr.
Theses and Dissertations
The United States Air Force today faces the challenge of allocating development resources to prepare for future force projection requirements. In particular, the Air Force's core competency of Global Attack implies a future capability that can quickly and successfully deliver combat effects anywhere in the world with impunity. Understanding that the future threat environment is dynamic and that continued advancements by adversaries will likely degrade the technical superiority of today's weapon systems, the need arises for a planning model to direct development funding to areas with the greatest probability of successfully defending the strike vehicle of 2035. Examining this problem …
Passive Geolocation Of Low Power Emitters In Urban Environments Using Tdoa, Myrna B. Montminy
Passive Geolocation Of Low Power Emitters In Urban Environments Using Tdoa, Myrna B. Montminy
Theses and Dissertations
Low-power devices are commonly used by the enemy to control Improvised Explosive Devices (IEDs), and as communications nodes for command and control. Quickly locating the source of these signals is difficult, especially in an urban environment where buildings and towers can cause interference. This research presents a geolocation system that combines several geolocation and error mitigation methods to locate an emitter in an urban environment. The proposed geolocation system uses a Time Difference of Arrival (TDOA) technique to estimate the location of the emitter of interest. Using sensors at known locations, TDOA estimates are obtained by cross-correlating the signal received …
Integrated Conceptual Design Of Joined-Wing Sensor Craft Using Response Surface Models, Josh E. Dittmar
Integrated Conceptual Design Of Joined-Wing Sensor Craft Using Response Surface Models, Josh E. Dittmar
Theses and Dissertations
A multidisciplinary conceptual design and analysis of Boeing's joined-wing SensorCraft has been conducted. This analysis was completed using geometrical optimization, aerodynamic analyses, and response surface methodology on a composite structural model. Phoenix Integration's Model Center was used to integrate the sizing and analysis codes found in Raymer's text, "Aircraft Design: A Conceptual Approach" as well as those from the NASA derived conceptual design tool AirCraft Synthesis (ACSYNT), and a modified Boeing Finite Element Model (FEM). This research demonstrated the utility of integrated low-order models for fast and inexpensive conceptual modeling of unconventional aircraft designs.
Analysis Of Layered Social Networks, Jonathan T. Hamill
Analysis Of Layered Social Networks, Jonathan T. Hamill
Theses and Dissertations
Prevention of near-term terrorist attacks requires an understanding of current terrorist organizations to include their composition, the actors involved, and how they operate to achieve their objectives. To aid this understanding, operations research, sociological, and behavioral theory relevant to the study of social networks are applied, thereby providing theoretical foundations for new methodologies to analyze non-cooperative organizations, defined as those trying to hide their structure or are unwilling to provide information regarding their operations. Techniques applying information regarding multiple dimensions of interpersonal relationships, inferring from them the strengths of interpersonal ties, are explored. A layered network construct is offered that …