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Air Force Institute of Technology

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Simulation Of Hydrologic Influences On Wetland Ecosystem Succession, Robert A. Pompilio Sep 1994

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 …

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A Preliminary System Dynamics Model Of A Constructed Wetland For The Mitigation Of Metals In Usaf Storm Water, Mark P. Smekrud Sep 1994

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 …

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A Methodology For Establishing Maximum Aircraft Combat Turn Rates, James R. Dudley, Michael J. Novotny Sep 1994

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 …

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A Three Region Analysis Of A Bounded Plasma Using Particle In Cell And Fluid Techniques, Don F. Nichols Sep 1994

A Three Region Analysis Of A Bounded Plasma Using Particle In Cell And Fluid Techniques, Don F. Nichols

Theses and Dissertations

A detailed collisionless sheath theory and a three-region collisional model of a bounded plasma are presented, and the suitability of the collisional model for analysis of ignited mode thermionic converters is investigated. The sheath theory extends previous analyses to regimes in which the sheath potential and electron temperatures are comparable in magnitude. In all operating regimes typical of a ignited mode thermionic converter, the predicted sheaths extend several mean-free paths. The apparent collisionality of the sheaths prompted development of a collisional, three-region model of the converter plasma. By interfacing Particle-in-Cell regions for the sheaths and fluid regions for the bulk …

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3d Stereo Data Visualization And Representation, Kai-Heng (Felix) Wang Sep 1994

3d Stereo Data Visualization And Representation, Kai-Heng (Felix) Wang

Theses and Dissertations

This thesis investigates a technique for improving the perception and visualization of three dimensional information. This improvement will eventually give physicians the ability to both visualize and understand biomedical image data. Raw data is used to generate a stereo image pair. The raw data must be put in run length encoding RLE format and then converted to a stereo pair. Once the stereo pair is generated, they must be displayed on the Silicon Graphics ONYX workstation in stereo mode. This research uses 3D images of planets and satellites. The display information is transmitted across cable and is projected onto a …

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Exposure Of A Food Crop To Trichloroethylene From A Contaminated Aquifer, Richard G. Baringer Sep 1994

Exposure Of A Food Crop To Trichloroethylene From A Contaminated Aquifer, Richard G. Baringer

Theses and Dissertations

This research developed a methodology for assessment of the exposure of a mature corn crop to trichloroethylene from a contaminated aquifer. The methodology was then applied to the case of Hill AFB to determine the ability of the methodology to provide information about a specific exposure. Current procedures sample for food contamination but do not attempt to predict exposure problems. A review of the potential exposure pathways from the aquifer to the crop was conducted. Based on this review, the exposures due to soil gas and irrigation were modeled. Empirical estimated were used to approximate the expected flux of soil …

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A Comparative Pharmacokinetic Study Of The Role Of Gender And Developmental Differences In Occupational And Environmental Exposure To Benzene, Elizabeth A. Brown Sep 1994

A Comparative Pharmacokinetic Study Of The Role Of Gender And Developmental Differences In Occupational And Environmental Exposure To Benzene, Elizabeth A. Brown

Theses and Dissertations

The purpose of this study is two-fold. First, it shows that physiological differences between men and women result in gender-specific exposures with respect to benzene. Second, it assesses the potential for a lactating woman's occupational and personal benzene exposure to impact a nursing infant's exposure, highlighting the possibility of subjecting an infant to the effects of industrial chemicals via breast feeding. This study employs physiologically based pharmacokinetic (PBPK) modeling to investigate the influence of physiological parameters and to evaluate the ability of inhaled benzene to transfer from mother to infant through breastmilk. The models are run through scenarios that simulate …

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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 Sep 1994

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 …

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Development Of Field Guidance For Assessing Feasibility Of Intrinsic Bioremediation To Restore Petroleum-Contaminated Soils, John T. Enyeart Sep 1994

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 …

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Coherence And Usability Of An Environmental Impact Statement, Jill A. Easterly Sep 1994

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 …

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Decision Support Model To Compare Hazardous Waste Site Remediation Process Alternatives, Christopher E. Findall Sep 1994

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 …

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Application Of A Risk Model To Quantify Relative Risk Of Remedial Actions, Timothy L. Fuller Sep 1994

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 …

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Development Of An Analytical Hierarchy Process (Ahp) Model For Siting Of Municipal Solid Waste Facilities, Dimasalang F. Junio Sep 1994

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 …

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Experiment In Water Dowsing, David I. Gaisford Sep 1994

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 …

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Volatile Organic Compound Emissions From Usaf Wastewater Treatment Plants In Ozone Nonattainment Areas, Brian A. Ouellette Sep 1994

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 …

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A Quantitative Method For Screening Pollution Prevention Program Options At United States Air Force Installations, Wayne M. Williams Sep 1994

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 …

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Review Of Factors Impacting Cost Benefit Analysis (Cba) For Implementing Improvements To The Air Force Technical Order System, Susan J. Bergin, Terry A. Parsons Sep 1994

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 …

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Using Parametric Cost Models To Estimate Engineering And Installation Costs Of Selected Electronic Communications Systems, John L. Bosworth Ii, Ronald J. Wiechmann Sep 1994

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 …

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Scenario Analysis: An Integrative Study And Guide To Implementation In The United States Air Force, Jamey B. Cihak, Steven A. Mozel Sep 1994

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 …

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Psychological Type And Preferences In The Academic Environment, Jeannine A. Duncan, Pamela J. Powers Sep 1994

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 …

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An Automated Cost Uncertainty Program, Dale N. Fletcher Sep 1994

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 …

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An Assessment Of Forecasting Methods: Cooperative Logistics Supply Support Arrangement (Clssa) Investment Items, Jeffrey S. Grafton, Earl W. Sollmann Sep 1994

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 …

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The Effect Of Violations Of The Constant Demand Assumption On The Defense Logistic Agency Requirements Model, William S. Long, Douglas H. Engberson Sep 1994

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 …

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The Effects Of Three-Dimensional Graphs On Decision Making, Anita E. Latin, Anthony L. Villanueva Sep 1994

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 …

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An Evaluation Of Department Of Defense Contractor's Cost Performance, John M. Pletcher, Jane C. Young Sep 1994

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 …

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A Maintenance Manpower Study Of The Composite Wing At Mountain Home Afb, Stella T. Smith, Cristina C. Vilella Sep 1994

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 …

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How Effective Has The Air Force Been In Eliminating Its Dependence On Ozone Depleting Chemicals?, L. Susan Willard Sep 1994

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 …

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An Analysis Of The Usefulness Of Graduate Education To Contracting Professionals As Perceived By Graduates And Their Supervisors, Ursula J. Woodson, Kimberly L. Yoder Sep 1994

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, …

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The Optical Emission And Absorption Properties Of Silicon-Germanium Superlattice Structures Grown On Non-Conventional Silicon Substrate Orientation, Theodore L. Kreifels Aug 1994

The Optical Emission And Absorption Properties Of Silicon-Germanium Superlattice Structures Grown On Non-Conventional Silicon Substrate Orientation, Theodore L. Kreifels

Theses and Dissertations

Optical emission and absorption properties of Si1-x Gex/Si superlattices grown on (100), (110), and (111) Si substrates were investigated to determine the optimal growth conditions for these structures to be used as infrared detectors. Fully-strained Si1-x Gex/Si superlattices were grown by molecular beam epitaxy MBE and examined using low-temperature photoluminescence PL to identify no-phonon and phonon-replica interband transitions across the alloy bandgap. Phonon-resolved emission was most intense for undoped quantum wells grown at 710°C for all three silicon orientations. Room temperature absorption measurements were conducted on (100) and (110) Si1-x Gex/Si …

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Use Of Infrared Spectrometry To Determine The Effect Of Temperature On The Description Rates Of Trichloroethylene From Plastic Clay 98b, Abdellatif Fares Aug 1994

Use Of Infrared Spectrometry To Determine The Effect Of Temperature On The Description Rates Of Trichloroethylene From Plastic Clay 98b, Abdellatif Fares

Theses and Dissertations

This thesis investigated the influence of temperature on the desorption rated of trichloroethylene (TCE) from plastic clay. It was expected that an increase in temperature will cause an increase in both the desorption rates of TCE and in the desorbed quantity. Previous studies on other chemicals indicated a faster decrease in the remaining sorbed concentration with an increase in temperature. This research made use of the infrared optical absorption technique. IR spectroscopy was used to measure the concentration of the vapor TCE that desorbed from the soil. The soil was exposed to liquid TCE for 2 days then placed inside …

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