Digital Commons Network^™

Effects Of Autotransfusion Of Unwashed Mediastinal Chest Drainage On Banked Red Blood Cell Requirements In Post Coronary Artery Bypass Grafting Patients, Dale H. Ruder

Theses and Dissertations

No abstract provided.

Soviet-German "Rehabilitation" And The Ethnic German Nationalist Wiedergeburt In The Ussr And Cis, 1987-1995, Eric J. Schmaltz

Theses and Dissertations

No abstract provided.

Zanan Bidun-E Mardan = Women Without Men, Morteza Gholi Sarlak

Theses and Dissertations

No abstract provided.

The Crow Response To The Bozeman Trail, 1866-68 : A Failure Of Neutrality, Frank Rzeczkowski

Theses and Dissertations

No abstract provided.

A Contemporary Indian Case Study : From Metaphor To Apple, Robin Marie Powell

Theses and Dissertations

No abstract provided.

Postdural Puncture Headache : A Retrospective Study Comparing The 25-Gauge Whitacre® And 24-Gauge Sprotte® Needles, Rebecca N. Rapp

Theses and Dissertations

No abstract provided.

Development Of A Pneumatic Spreading System For Silicon Carbide Precursor Tows, Allan A. Puzianowski

Theses and Dissertations

No abstract provided.

Aftercare Compliance And Addiction Recovery In A Rural Setting, Linda Fjeld Nygaard

Theses and Dissertations

No abstract provided.

The Cost Effectiveness Of Using Ondansetron Prophylactically Intraoperatively In Pediatric Tonsillectomy Patients, Beth Ann Owens

Theses and Dissertations

No abstract provided.

Analysis Of The Compressive And Tensile Properties Of Kevlar Fiber After Thermal Treatment, Fernanda Santos Philbrick

Theses and Dissertations

No abstract provided.

Measurement Of Grinding Zone Temperatures For Steel Using Infrared Imaging Techniques, Carl Jon Muehlenbeck

Theses and Dissertations

No abstract provided.

Structural Studies On The Effects Of Halogen Substituted Rings In Ii-Arene Crl₃, ₄ Complexes Containing Trichlorosilyl Ligands, Roger T. Palmer

Theses and Dissertations

No abstract provided.

Attitudes Of Undergraduate Students Toward Racial/Ethnic Issues And Groups At The University Of North Dakota., Marlene Ibrahim Bengiamin

Theses and Dissertations

A key goal of multicultural education is to help students attain more positive racial attitudes. Racial incidents on college and university campuses in the United States attracted national attention. The schools in Western societies need to act decisively to help students acquire more democratic attitudes and values. The literature suggests that schools can help students become less prejudiced and acquire more democratic attitudes and values.The purpose of this study was to examine students' attitudes toward racial/ethnic issues and groups and to identify predictors of attitudes among undergraduate college students (N = 583). Data were gathered using a three part survey …

Studies On The 13-Carbaartemisinin Antimalarials: Total Synthesis And Iron(Ii) Bromide-Promoted Rearrangement Of 13-Carba-10-Deoxoartemisinin And Analogs, And, Samarium(Ii) Iodide-Promoted Reductive Cyclization Of Ketones Tethered To Nonactivated Olefins., Pingchen Fan

Theses and Dissertations

Part one is the study of 13-carbaartemisinin analogs as potential antimalarial drugs. Based on knowledge of the artemisinin's chemistry, mode of action, and structure-activity relationship, we proposed 13-carba-10-deoxoartemisinin 6 as an orally active antimalarial. Thus, the total synthesis of 6 was carried out and completed in 12 steps with a yield of 2% starting with ($-$)isopulegol. More analogs were produced from an intermediate in the total synthesis sequence: two stereoisomers of 6, 13-carbaartemisinin, and five tricyclic analogs. In general, the 13-carba analogs showed lower in vitro biological activity than artemisinin 1, only a stereoisomer of 6 displayed comparable activity to …

Mary Wilkins Freeman's Treatment Of Race, Children, And Women In Light Of Ethical Criticism., Hazel Retzlaff

Theses and Dissertations

Freeman's critical reputation was determined by cultural definitions of women, and women writers, just as her portrayals of race, children, and women in the short stories, novels, and plays place her in the cultural context of her time. After virtual critical neglect from 1930-1975, there is a revival of interest in her writing--evidenced by a full-length study, a collection of criticism, a collection of her previously uncollected stories, and numerous articles. This renewed conversation about Freeman's work provides the impetus to evaluate the effect of her fiction on her own time and on present readers, ethical criticism as practiced by …

Walking Lightly On The Planet: A Curriculum Enrichment For The Pinelands Science Unit Of The Cherry Hill Environmental Education Residency Program On Pinelands Ecology, Elaine Ruth Miller

Theses and Dissertations

This thesis project is designed to produce written curriculum materials in Pinelands ecology. The written curriculum materials produced are intended to be implemented as part of the Pinelands Science Unit of the Cherry Hill Environmental Education Residency Program, also known as CHEER.

The written curriculum materials will include pre-trip, resident trip, and follow up assessment materials and activities that follow the given format for all Cherry Hill science units. The structure of such a program will allow, if desired, interdisciplinary coordination between science, math, English and ecology that correlate with the existing CHEER program. Through this experience it is expected …

Sexual Harassment In North Dakota Public Schools: A Study Of Eight Schools, Stanley D. Stratton Ii

Theses and Dissertations

No abstract provided.

Methodology For Implementing Fracture Mechanics In Global Structural Design Of Aircraft, Clifton D. Nees

Theses and Dissertations

The analysis and design criteria of fracture mechanics are investigated for implementation with the Automated Structural Optimization System (ASTROS) global optimization design tool. The main focus is the optimal design of aircraft wing panels by applying fracture mechanics design criteria within the global finite element model. This effort consists of four main phases: investigation of fracture mechanics analysis methods and design criteria, formulation of a computational technique for damage tolerance design consistent with global optimization requirements, integration of the technique into the ASTROS design tool, and demonstration of the results.

Transforming Algebraically-Based Object Models Into A Canonical Form For Design Refinement, Charles G. Beem

Theses and Dissertations

The understandability of object-oriented design techniques and the rigor of formal methods have improved the state of software development; however, both ideas have limitations. Object-oriented techniques, which are semi-formal, can still result in incorrect designs, while formal methods are complex and require an extensive mathematical background. The two approaches can be coupled, however, to produce designs that are both understandable and verifiable, and to produce executable code. This research proposes an approach where object-oriented models are first represented algebraically in a formal specification language such as LARCH and then transformed into a canonical form suitable for design refinement. In the …

The Application Of Hybridized Genetic Algorithms To The Protein Folding Problem, Robert L. Gaulke

Theses and Dissertations

The protein folding problem consists of attempting to determine the native conformation of a protein given its primary structure. This study examines various methods of hybridizing a genetic algorithm implementation in order to minimize an energy function and predict the conformation (structure) of Met-enkephalin. Genetic Algorithms are semi-optimal algorithms designed to explore and exploit a search space. The genetic algorithm uses selection, recombination, and mutation operators on populations of strings which represent possible solutions to the given problem. One step in solving the protein folding problem is the design of efficient energy minimization techniques. A conjugate gradient minimization technique is …

An Object-Oriented, Formal Methods Approach To Organizational Process Modeling, Vincent S. Hibdon

Theses and Dissertations

This document presents a methodology for developing an organizational process model which is based on the principles of object oriented design and formal software engineering methods. The methodology begins with the development of an object oriented Rumbaugh model (27). The Rumbaugh model is then formally specified in Z (Zed) schemas. Finally, the Z specifications are translated into an executable model in the Software Refinery Environment(TM). This model is described based on the AF wing domain and developed in this domain. The proposed methodology is then shown to produce a very general model which is extendable across almost any domain. The …

Determining The Effects Of Waste Coal Ash On Landfill Radon Levels, Richard S. Krysiak Jr.

Theses and Dissertations

Coal contains trace amounts of the primary radionuclides ⁴⁰K, and elements of the 4n (²³²Th), 4n+2 (²³⁸U), and 4n+3 (²³⁵U) series including ²²⁰Rn and ²²²Rn. Combustion of coal by electric power and heat plants result in concentration of noncombustible mineral matter, including most of the radionuclides, in the coal ash. The increased radiation due to the concentration of radionuclides is known as technologically enhanced natural radiation. The purpose of this research was to determine the effects of landfilled coal ash on one specific aspect of technologically enhanced natural radiation, radon levels. …

A Quantitative Feedback Theory Fcs Design For The Subsonic Envelope Of The Vista F-16 Including Configuration Variation And Aerodynamic Control Effector Failures, Vicent J. Cacciatore

Theses and Dissertations

Fault tolerant flight control systems for combat aircraft are an alternative to excessively redundant aircraft designs or reconfigurable control laws. However, due to the range of flight conditions within a combat aircraft's operational flight envelope, the variety of its configurations, and the unavailability of an aerodynamic data base for damaged aircraft, designing fault tolerant systems is a complicated endeavor. Quantitative Feedback Theory is a robust control design technique especially well-suited to manage the structured parametric uncertainty inherent in this problem, and consequently is applied as the primary design tool for this research. Furthermore, realistic failure models are developed for the …

Exmis: An Expert System For The Autonomous Onboard Command System (Aocs), Kevin D. Benedict

Theses and Dissertations

The primary objective of this study is the creation of a prototype expert system called EXMIS (EXpert MIssile System) that performs the flight termination logic sequence of the Autonomous Onboard Command System (AOCS). The AOCS is a proposed system that would take the "man-in-the-loop" out of the self-destruct decision making process and place the entire decision on the launch vehicle. Through the use of a six degree of freedom trajectory program called BOOST, simulated flight data for four different flight scenarios is obtained. The launch vehicle selected for the simulations is the Peacekeeper ICBM. EXMIS is developed using an expert …

Play As A Learning Tool In An Inclusive Kindergarten Classroom, Catherine J. Draper

Theses and Dissertations

No abstract provided.

Investigation Of Residual Strength And Fatigue Life Of Unstiffened Aluminum Panels With Multiple Site Damage, Mark C. Cherry

Theses and Dissertations

Multiple Site Damage MSD is the occurrence of small fatigue cracks at several sites within aircraft structures. This is important since it may lower the residual strength and fatigue life of the structure beyond what can be predicted using the damage tolerance technique based on a single crack, currently in use to design aircraft structures. This study investigated the effects of MSD on unstiffined panels. MSD usually occurs at rivet holes, or other stress concentration locations within an aircraft structure. This study simulated rivet holes with MSD, by using holes of constant diameter with small cracks, evenly spaced across the …

Stress/Strain Ratio Effects On Fatigue Response Of A Scs-6/Ti-15-3 Metal Matrix Composite At Elevated Temperature, Sean C. Jackson

Theses and Dissertations

This study investigated the fatigue life and damage mechanisms of a [0]₈, SCS-6/Ti-15-3, metal matrix composite at 427°C for three different stress/strain ratios, R = -1, 0 and 0.5. Fatigue life and damage mechanism comparisons were made for the varying R ratios and between the load and strain control modes. Fatigue life comparisons show that on a maximum stress/strain basis as R is increased fatigue life increases while on a stress/strain range basis as R increases fatigue life decreases. Similar damage mechanisms were found between the R = -1 and R = 0 tests conducted at the same …

The Role Of Frame Selection And Bispectrum Phase Reconstruction For Speckle Imaging Through Atmospheric Turbulence, Elizabeth A. Harpold

Theses and Dissertations

Frame selection using quality sharpness metrics have been shown in previous AFIT theses, to be effective in improving the final product of images obtained using adaptive optics. This thesis extends this idea to noncompensated speckle image data. Speckle image reconstruction is simulated with and without frame selection. Speckle images require the processing of hundreds of data frames. Frame selection is a method of reducing the amount of data required to reconstruct the image. A collection of short exposure image data frames of a single object are sorted based on sharpness metrics. Only the highest quality frames are retained and processed …

A Comparison Of Methods For Estimating Rms Error: A `Brute Force" Approach Versus A Mathematically-Elegant Approach, As Applied To The Calculation Of A Specific Retrieval Error For A Limb-Scanning Microwave Radiometer-Spectrometer, Larry L. Johnson

Theses and Dissertations

The Millimeter-wave Atmospheric Sounder (MAS) is a high resolution limb- scanning microwave radiometer-spectrometer which has been flown aboard the Space Shuttle. The instrument was designed to sense the microwave emission from several upper atmospheric constituents, including water vapor and ozone. The resonant frequencies of water vapor and ozone are extremely close (183 and 184 GHz, respectively), so that the high-frequency wing of the water vapor spectrum overlaps the low frequency wing of the ozone spectrum. Consequently, the measured ozone spectrum incorporates a slight water vapor contribution; therefore, the retrieved ozone profile is dependent on the true water vapor profile. The …

Validation Testing A Contaminant Transport And Natural Attenuation Simulation Model Using Field Data, Steven J. Flier

Theses and Dissertations

This research extends the work begun by Enyeart (1994) which evaluated the process of intrinsic bioremediation, and which developed a model for predicting the velocity of an aerobic degradation front, as it traverses the length of a JP-4 contaminant plume. It is assumed this aerobic front will traverse the contaminant plume as dissolved oxygen is carried by the ground water through the sorption-retarded contaminant. The ultimate purpose of Enyeart's model is to use it to develop field guidance for assessing the feasibility of intrinsic bioremediation to restore petroleum-contaminated soils. After simulating intrinsic bioremediation many times with a spreadsheet model, results …