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Articles 19711 - 19740 of 22471
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Development Of An Analysis Method To Identify The Root Causes Of Finding From The Air Force Environmental Compliance Assessment And Management Program (Ecamp), Frederick B. Cade
Development Of An Analysis Method To Identify The Root Causes Of Finding From The Air Force Environmental Compliance Assessment And Management Program (Ecamp), Frederick B. Cade
Theses and Dissertations
The Air Force is committed to being a national leader in achieving environmental compliance. This commitment is exemplified by the Air Force Chief of Staffs goal of no 'notices of violation.' This goal, however, has proven to be elusive. In the early 1990s, the number of Air Force notices of violation (NOVs) increased by 73%, from 103 to 178. One of the reasons may be findings from the Environmental Compliance Assessment and Management Program (ECAMP) are not being utilized effectively. This research developed an analysis method to identify root causes of ECAMP findings. The model emphasized the use of performance …
Coherence And Usability Of An Environmental Impact Statement, Jill A. Easterly
Coherence And Usability Of An Environmental Impact Statement, Jill A. Easterly
Theses and Dissertations
The purpose of this research effort was to investigate the application of certain principles of effective communication to improve the comprehension, and ultimately the usability, of an Environmental Impact Statement (EIS). Principles from cohesion theory (an area of research describing effective design) were used to manipulate the design of select sections of two sample EISs. Each sample EIS was altered to manipulate the presence and/or absence of visual and linguistic cohesion. Subjects were required to read select versions from each section of the two sample EISs and answer four short answer questions. The dependent variables were accuracy in answering the …
Development Of Field Guidance For Assessing Feasibility Of Intrinsic Bioremediation To Restore Petroleum-Contaminated Soils, John T. Enyeart
Development Of Field Guidance For Assessing Feasibility Of Intrinsic Bioremediation To Restore Petroleum-Contaminated Soils, John T. Enyeart
Theses and Dissertations
This research evaluated the process of intrinsic bioremediation, also called natural attenuation, and the parameters that affected it. The goal of this study was to use these intrinsic bioremediation parameters to develop a valid prediction of the cleanup duration using this restoration technology. This analysis was limited to a JP-4 release and focused on the remediation of the BTEX constituents to a cleanup level of 10 ppm total BTEX. The review of intrinsic bioremediation found that the BTEX hydrocarbons can aerobically and anaerobically biodegrade. Of the many factors that affect intrinsic bioremediation, those that most influenced its occurrence were the …
Decision Support Model To Compare Hazardous Waste Site Remediation Process Alternatives, Christopher E. Findall
Decision Support Model To Compare Hazardous Waste Site Remediation Process Alternatives, Christopher E. Findall
Theses and Dissertations
This research focuses on the development of a decision support model to identify the preferred methods of site characterization and treatment technology identification using the principles of decision analysis theory. The model provides an effective decision making tool to evaluate and compare the feasibility of using alternative methods of completing the RIFS process. Given a specific site remediation project, the users of this model can enter site- specific cost, duration and likelihood values to determine the expected value for various alternative processes. This thesis postulates that the alternative having the highest expected value is considered the preferred alternative. In calculating …
Application Of A Risk Model To Quantify Relative Risk Of Remedial Actions, Timothy L. Fuller
Application Of A Risk Model To Quantify Relative Risk Of Remedial Actions, Timothy L. Fuller
Theses and Dissertations
To properly manage the Installation Restoration Program (IRP) in the future, Air Force remedial project managers (RPMs) need a metric to assist in the selection of remedial alternatives for the safe and effective clean up of waste contamination sites. If the baseline site risk assessment indicates that it is necessary to remediate a waste contamination site, it is important to the RPM that the selection process for remediation alternatives considers the potential human health and ecological risks associated with the proposed remediation process. In some instances, the risks may be significant when compared to the baseline conditions. The Air Force …
Experiment In Water Dowsing, David I. Gaisford
Experiment In Water Dowsing, David I. Gaisford
Theses and Dissertations
Dowsing is a folklore process used to locate an unknown, such as the best location for a water well, by the use of a hand-held device. The process is commonly know as water witching, divining, dowsing or radiesthesia. The practice continues despite the lack of a proven scientific basis. This research develops an experiment to test the claims of a dowser. Specific procedures are established and statistical theory is applied to determine if one man can identify which of five water lines has flowing water in it better than a chance operator could achieve. The statistical analysis uses Abraham Wald's …
Development Of An Analytical Hierarchy Process (Ahp) Model For Siting Of Municipal Solid Waste Facilities, Dimasalang F. Junio
Development Of An Analytical Hierarchy Process (Ahp) Model For Siting Of Municipal Solid Waste Facilities, Dimasalang F. Junio
Theses and Dissertations
Deciding on locations for municipal solid waste facilities is a difficult problem where qualitative criteria compete with quantitative economic and engineering criteria, in an environment that is highly political and emotional. State guidelines often describe different methodologies but fall short in offering a solution or a methodology in arriving at a solution. This study develops a decision modeling procedure, based on the Analytical Hierarchy Process (AHP), that can be used by public sector decision makers to locate and site municipal solid waste facilities. The applicability of the procedure is demonstrated at the City of Springfield, Clark County, Ohio. Research efforts …
Experiment Using Infrared Spectroscopy To Study The Effect Of Soil Characteristics Upon The Rate Of Trichloroethylene Desorption, Benjamin T. Kindt
Experiment Using Infrared Spectroscopy To Study The Effect Of Soil Characteristics Upon The Rate Of Trichloroethylene Desorption, Benjamin T. Kindt
Theses and Dissertations
This research investigated the influence of soil characteristics on the desorption of trichloroethylene (TCE). TCE is one of the most common contaminants at Superfund sites. Unfortunately, extraction of TCE from contaminated soils has been hindered by its slow and poorly understood desorption from soil particles. The rate and progress of desorption of TCE from seven types of soil with varying particle diameters and elemental compositions was measured using optical absorption techniques. Fitting the data to the Langmuir Isotherm functional form predicted in the literature yielded parameters for the desorption rate and total amount desorption each soil type. These parameters were …
Modeling Trihalomethane Formation Potential From Wastewater Chlorination, Carol A. Mccormick
Modeling Trihalomethane Formation Potential From Wastewater Chlorination, Carol A. Mccormick
Theses and Dissertations
The deletion of federally mandated fecal coliform limits has led many states to review and modify their wastewater disinfection requirements. One issue in analyzing wastewater disinfection is the discharge of potentially carcinogenic halogenated organics formed during the chlorination process. This research investigates the formation of one class of the halogenated organics, the trihalomethanes. The applicability of using drinking water trihalomethane formation models for use with wastewater effluent is examined. Three models are compared for predictive capability by using measured trihalomethane values from previous research data. The results show that a previously developed model is applicable for use based on assumptions …
Volatile Organic Compound Emissions From Usaf Wastewater Treatment Plants In Ozone Nonattainment Areas, Brian A. Ouellette
Volatile Organic Compound Emissions From Usaf Wastewater Treatment Plants In Ozone Nonattainment Areas, Brian A. Ouellette
Theses and Dissertations
In accordance with the 1990 Clean Air Act Amendments CAAA, this research conducts an evaluation of the potential emission of volatile organic compounds VOCs from selected Air Force wastewater treatment plants. Using a conservative mass balance analysis and process specific simulation models, volatile organic emission estimates are calculated for four individual facilities--Edwards AFB, Luke AFB, McGuire AFB, and McClellan AFB--which represent a cross section of the current inventory of USAF wastewater plants in ozone nonattainment areas. From these calculations, maximum facility emissions are determined which represent the upper limit for the potential VOC emissions from these wastewater plants. Based on …
Simulation Of Hydrologic Influences On Wetland Ecosystem Succession, Robert A. Pompilio
Simulation Of Hydrologic Influences On Wetland Ecosystem Succession, Robert A. Pompilio
Theses and Dissertations
This research focuses on the development of a simulation model to determine the effects of hydrological influences on a wetland ecosystem. The model allows perturbations to the inputs of various wetland data which in turn, influences the successional development of the ecosystem. This research consisted of converting a grassland ecosystem model to one which simulates wetland conditions. The critical factor in determining the success of wetland creation is the hydrology of the system. There are four of the areas of the original model which are affected by the hydrology. The model measures the health or success of the ecosystem through …
A Preliminary System Dynamics Model Of A Constructed Wetland For The Mitigation Of Metals In Usaf Storm Water, Mark P. Smekrud
A Preliminary System Dynamics Model Of A Constructed Wetland For The Mitigation Of Metals In Usaf Storm Water, Mark P. Smekrud
Theses and Dissertations
This thesis determines the potential removal and corresponding accumulation of trace metals from Air Force storm water in a constructed wetland through the use of a System Dynamics model. The goal is to determine whether constructed wetlands used as storm water best management practices provide efficient metal removal while creating only benign accumulations of such pollutants. Its purpose is to allow Base Civil Engineers and Environmental Managers a better tool to assess the long-term effects of a constructed wetland used as a storm water mitigation technique. The research is limited to the assessment of typical metal concentrations found in Air …
A Quantitative Method For Screening Pollution Prevention Program Options At United States Air Force Installations, Wayne M. Williams
A Quantitative Method For Screening Pollution Prevention Program Options At United States Air Force Installations, Wayne M. Williams
Theses and Dissertations
US Air Force installations worldwide are required to implement pollution prevention (PP) programs designed to reduce the release of pollutants to the environment, and the Air Force uses opportunity assessments (OAs) to identify and evaluate waste producing processes that could benefit from a PP project. The OA process guidance provides extensive details on how to identify potential projects and on how to economically evaluate a project selected for implementation. However, it provides only cursory information about how to decide which projects should be selected for this evaluation. This thesis bridges that gap by providing a quantitative model to be used …
Review Of Factors Impacting Cost Benefit Analysis (Cba) For Implementing Improvements To The Air Force Technical Order System, Susan J. Bergin, Terry A. Parsons
Review Of Factors Impacting Cost Benefit Analysis (Cba) For Implementing Improvements To The Air Force Technical Order System, Susan J. Bergin, Terry A. Parsons
Theses and Dissertations
This research focused on developing a Cost Benefit Analysis process for Program Managers to implement when deciding what technical order format-- paper, computerized or automated--to purchase. Factors which determined the outcome are costs life cycle cost considering technical order format qualitative issues characteristics which are benefits of a technical order format and system responsiveness time required to develop or modify a technical order in each format. A literature review revealed problems with the paper technical order format, management infrastructure, quantitative cost estimates for different formats, and different techniques which could be used for a cost benefit analysis. Structured interviews were …
Using Parametric Cost Models To Estimate Engineering And Installation Costs Of Selected Electronic Communications Systems, John L. Bosworth Ii, Ronald J. Wiechmann
Using Parametric Cost Models To Estimate Engineering And Installation Costs Of Selected Electronic Communications Systems, John L. Bosworth Ii, Ronald J. Wiechmann
Theses and Dissertations
This study developed a set of cost driver definitions for use by the Communications. Systems Center CSC, headquartered at Tinker AFB, Oklahoma. CSC is responsible for the engineering and installation of a dozen types of ground-based electronic communication and navigation systems, ranging from mobile radio systems to base telephone switches and air traffic control systems. Under changes brought about by the implementation of the Defense Business Operating Fund DBOF, the Communications System Center is searching out new customers and new cost estimating methodologies to improve customer service. The definitions were used to gather historical data of equipment, engineering, and installation …
Scenario Analysis: An Integrative Study And Guide To Implementation In The United States Air Force, Jamey B. Cihak, Steven A. Mozel
Scenario Analysis: An Integrative Study And Guide To Implementation In The United States Air Force, Jamey B. Cihak, Steven A. Mozel
Theses and Dissertations
With the uncertainties in the current Air Force environment, extrapolated forecasting methods are no longer sufficient for meeting the Air Forces strategic planning needs. The Air Force could benefit from using a more sophisticated method to determine the opportunities and obstacles it will face in the future. The key characteristics that distinguish scenario analysis from other forms of forecasting are the qualitative, contextual descriptions of the future environment, and the identification of several possible futures. This thesis discusses the concept of scenario analysis and its relevance to the Air Force as a strategic planning tool. It begins with an overview …
A Methodology For Establishing Maximum Aircraft Combat Turn Rates, James R. Dudley, Michael J. Novotny
A Methodology For Establishing Maximum Aircraft Combat Turn Rates, James R. Dudley, Michael J. Novotny
Theses and Dissertations
The Air Force relies on the Status of Reports and Training System SORTS as an indicator of unit readiness. Unit Capability Levels C-Levels reported in SORTS are determined through measurements of on-hand resources and computer estimates of unit capabilities. Aircraft maximum turn rate, defined as the maximum number of sorties an aircraft can fly in a 24-hour period, is an input parameter to the assessment model. The methods used today produce maximum turn rates with unverifiable accuracy. Unit capabilities required to generate aircraft sorties are documented and their relationship to maximum turn rate established in this study. A unit capabilities …
Psychological Type And Preferences In The Academic Environment, Jeannine A. Duncan, Pamela J. Powers
Psychological Type And Preferences In The Academic Environment, Jeannine A. Duncan, Pamela J. Powers
Theses and Dissertations
This research addresses significant relationships between the components of an individual's psychological type and cognitive style, as measured by the Myers-Briggs Type Indicator (MBTI), and preferences within the academic environment, as indicated on the Educational Style Survey (ESS). The areas within the academic environment which were addressed include classroom configuration, subject matter difficulty, student's study strategy, testing method preferences, amount of student/faculty interaction, and adaptability to academic stress. The sample consisted of 695 Air Force Institute of Technology (AFIT) graduate students in the School of Logistics and Acquisition Management (1985-93) who completed the MBTI and the ESS. The analysis utilized …
An Automated Cost Uncertainty Program, Dale N. Fletcher
An Automated Cost Uncertainty Program, Dale N. Fletcher
Theses and Dissertations
The purpose of this research was to develop a menu driven, computer program that implemented methodologies for cost uncertainty analysis. Cost uncertainties have been quantified using either simulation techniques or through heuristic means. Simulation techniques require time to run the required number of iterations. Current computer based heuristic methods do not check correlation matrices for consistency nor do they enable the analyst to perform queries. This research resulted in the development of an automated heuristic cost uncertainty program which alleviates the limitations of current computer programs. The program contains a file editor for creating and modifying data files, a cost …
Mitigating The Effects Of Manpower Reductions At A Central Issue Facility By Improving The Allocation Of Servers: A Simulation Study, Michael K. Garrity, Christopher J. Wicker
Mitigating The Effects Of Manpower Reductions At A Central Issue Facility By Improving The Allocation Of Servers: A Simulation Study, Michael K. Garrity, Christopher J. Wicker
Theses and Dissertations
The purpose of this research was to determine a preferred server allocation and a preferred customer batch size for processing customers at an Army Central Issue Facility CIF under various manpower levels. The CIF is a retail warehouse which issues tactical clothing and equipment to individual soldiers. It is facing potential manpower reductions from the current level of 19 servers. The CIF exhibits flow shop characteristics. An assembly line balancing approach was used with the objective of reducing the customers average time-in-system. Five server allocation heuristics and three customer batch sizes were examined. The evaluation tool was a computer simulation …
An Assessment Of Forecasting Methods: Cooperative Logistics Supply Support Arrangement (Clssa) Investment Items, Jeffrey S. Grafton, Earl W. Sollmann
An Assessment Of Forecasting Methods: Cooperative Logistics Supply Support Arrangement (Clssa) Investment Items, Jeffrey S. Grafton, Earl W. Sollmann
Theses and Dissertations
The United States (US) promotes collective security in the Free World via the Foreign Military Sales (FMS) program. FMS customers prefer to acquire weapon system logistic support through FMS rather than by direct commercial vendor support. Ninety-seven percent of the follow-on logistics requirements are submitted via a special program called Cooperative Logistics Supply Support Arrangement CLSSA. CLSSA, while sound in theory, has been a poor performer. The USAF must modify the CLSSA program or risk losing future FMS to competing nations. Modifying CLSSA to utilize an automated forecasting process will greatly improve customer service. Efficient and timely logistic support is …
An Analysis Of The Effects Of Lean Logistics On The Current Air Force Reparable Pipeline: A Simulation Study, Tracey L. Hill, William N. Walker
An Analysis Of The Effects Of Lean Logistics On The Current Air Force Reparable Pipeline: A Simulation Study, Tracey L. Hill, William N. Walker
Theses and Dissertations
This research investigates the effect of Lean Logistics proposals on the current Air Force repairables pipeline. Lean Logistics proposes reducing reparable asset levels at operating bases, reducing transportation time between bases and depots, and reducing depot repair times. Computer simulation is used as a tool to perform a 3X3X3 full factorial experiment to determine the effects of the Lean Logistics proposals on fully mission capable aircraft and transportation cost. Results indicate that lean Logistics outperforms the current repairables pipeline in term of fully mission capable aircraft. A cost benefit analysis is performed to determine the trade offs between transportation costs …
The Effect Of Violations Of The Constant Demand Assumption On The Defense Logistic Agency Requirements Model, William S. Long, Douglas H. Engberson
The Effect Of Violations Of The Constant Demand Assumption On The Defense Logistic Agency Requirements Model, William S. Long, Douglas H. Engberson
Theses and Dissertations
This project determined the impact of stationary but non-continuous demand levied in a multi-echelon system. Specifically discussed is how this lumpy demand affected the Defense Logistics Agency, Defense Electronics Supply Center in its computed inventory levels and total variable costs. To determine the impact of lumpy demand, data was extracted from the Defense Logistics Agency, Defense Electronics Supply Center Dayton, Ohio. Based on patterns of demand and distributions, the authors constructed a SLAM 2 model that depicted lumpy orders being received at the Defense Logistics Agency. The SLAM 2 model was constructed for the proposed system and simulation runs were …
The Effects Of Three-Dimensional Graphs On Decision Making, Anita E. Latin, Anthony L. Villanueva
The Effects Of Three-Dimensional Graphs On Decision Making, Anita E. Latin, Anthony L. Villanueva
Theses and Dissertations
The objective of this thesis was to determine whether or not, and by how much, three-dimensional graphs are more accurate and efficient than two- dimensional graphs and tables when presenting alternatives to decision makers. A graphical experiment was designed using a microcomputer. This experiment presented a business scenario to test Air Force Institute of Technology AFIT Professional Continuing Education PCE students. The experiment attempted to determine how well DoD decision makers accurately and efficiently performed elementary data collection tasks using various graphs or tables. The experiment used a randomized order within-subject factorial design with repeated measures. The factorial experiment was …
An Evaluation Of Department Of Defense Contractor's Cost Performance, John M. Pletcher, Jane C. Young
An Evaluation Of Department Of Defense Contractor's Cost Performance, John M. Pletcher, Jane C. Young
Theses and Dissertations
This study examines the cause of cost overrun recoveries within Department of Defense DoD contracts. In this time of extremely limited congressional funding, it is crucial the DoD avoid cost overruns. Information provided to contracting officers and contractors which would help avoid cost overruns would prove extremely valuable to the DoD. This study attempts to address this problem in two ways determine the cause of overrun recoveries determine whether a statistical difference in cost and schedule performance exists among DoD contractors. Interviews, document reviews, and a two-sample t- test were used to analyze the contracts that recovered from early cost …
Analysis Of The Effects Of Fixed Costs On Learning Curve Calculations, Charles B. Shea, Kenneth P. Thomson
Analysis Of The Effects Of Fixed Costs On Learning Curve Calculations, Charles B. Shea, Kenneth P. Thomson
Theses and Dissertations
The goal of this research was to analyze the effect of fixed costs on learning curve calculations. The research focused on two general research areas. The first area addressed the identification of current cost analysis practice for handling fixed costs in learning curve calculations. After identification of current practice, the unit learning curve models AXb ability to estimate total production run costs for a new production run when the slope was derived from both total cost and variable cost historical lot data was examined. Historical lot cost data was simulated for both the total cost and variable cost cases under …
A Maintenance Manpower Study Of The Composite Wing At Mountain Home Afb, Stella T. Smith, Cristina C. Vilella
A Maintenance Manpower Study Of The Composite Wing At Mountain Home Afb, Stella T. Smith, Cristina C. Vilella
Theses and Dissertations
In response to changes in threats, the Air Force has reorganized several flying units into composite wings. They are intended to provide a flexible, rapid deployment force. This study focused on the impact of the composite wing organizational structure on the determination of maintenance manpower authorizations at Mountain Home AFB, the Air Forces first air intervention wing. An opinion survey of maintenance and manpower experts was used to identify factors that are important in the determination of maintenance manpower authorization levels. Statistical analysis identified important-factors and indicated differences in opinion between maintenance and manpower specialists. Factors specific to the composite …
How Effective Has The Air Force Been In Eliminating Its Dependence On Ozone Depleting Chemicals?, L. Susan Willard
How Effective Has The Air Force Been In Eliminating Its Dependence On Ozone Depleting Chemicals?, L. Susan Willard
Theses and Dissertations
This research was undertaken to determine how effectively the Air Force had eliminated its dependence on Ozone Depleting Chemicals. The research was limited to analyzing the impact of ODCs on major acquisition programs. Results indicated existing variables which may be impeding full implementation. Also identified were lessons learned which could be applied to future environmental legislation with potential impact on acquisition programs. In- depth telephonic interviews were conducted with Program Directors responsible for the development and fielding of major Air Force acquisition programs. Analysis revealed that ODCs substantially impacted the acquisition programs to the extent that many programs had classified …
An Analysis Of The Usefulness Of Graduate Education To Contracting Professionals As Perceived By Graduates And Their Supervisors, Ursula J. Woodson, Kimberly L. Yoder
An Analysis Of The Usefulness Of Graduate Education To Contracting Professionals As Perceived By Graduates And Their Supervisors, Ursula J. Woodson, Kimberly L. Yoder
Theses and Dissertations
The purpose of this research was to assess the usefulness of graduate education to contracting professionals as perceived by graduates and their supervisors. Based on a list of 22 skills used by contracting professionals, graduates and their supervisors were surveyed to determine to what extent graduates possess these skills, developed these skills in their graduate degree program, and use these skills in the performance of their jobs. Air Force Institute of Technology Contracting Management Graduates since 1988 and contracting professionals with masters degrees within the Air Force Materiel Command were identified for this study. As a result of this study, …
A Numerical Analysis Of Smoothed Particle Hydrodynamics, David A. Fulk
A Numerical Analysis Of Smoothed Particle Hydrodynamics, David A. Fulk
Theses and Dissertations
This dissertation studies the numerical method of Smoothed Particle Hydrodynamics SPH as a technique for solving systems of conservation equations. The research starts with a detailed consistency analysis of the method. Higher dimensions and non-smooth functions are considered in addition to the smooth one dimensional case. A stability analysis is then performed. Using a linear technique, an instability is found. Solutions are proposed to resolve the instability. Also a total variation stability analysis is performed leading to a monotone form of SPH. The concepts of consistency and stability are then used in a convergence proof. This proof uses lemmas derived …