Index Catalog // ScholarsArchive@OSU

Ontologies to Support Repeatable and Valid Customer Requirements Generation

Creator:: Lemke, Mark T.
Abstract:: Due to the growing complexity, sophistication, and interconnectedness of present day engineered products and services, the use of ontologies in engineering design is becoming more widespread. An ontology provides a standardized way of describing concepts in a domain of interest and the relationships between these concepts to better understand the...
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF Mark T. Lemke for the

Describing Tsunami Inundation and Debris Motion using Optical Measurement Methods in a Large-Scale Wave Basin

Creator:: Rueben, Matthew Robert
Abstract:: This thesis consists of two papers in manuscript format. The first paper presents optical measurements of tsunami inundation through an urban waterfront in a laboratory wave basin. The physical model was constructed at 1:50 scale and was an idealization of the town of Seaside, Oregon. The paper presents an analysis...
Resource Type:: Honors College Thesis
Full Text:: Trial 99 at t=26.3s with calculated wave edge. Right: Time series of in-situ free surface elevation

Nonlinear model reduction using the group proper orthogonal decomposition method

Creator:: Dickinson, Benjamin T.
Abstract:: Proper orthogonal decomposition (POD) in conjunction with the Galerkin projection has been used as a model reduction technique for the tractable real-time control of high-dimensional systems. While POD based model reduction may improve the tractability of high-dimensional models, the nonlinear POD based model may be impractical for control due to...
Resource Type:: Masters Thesis
Full Text:: approximation to u(t,x) be written u(t,x) ≈ uN(t,x) = N∑ j=1 αj(t)βj(x), (2.13) where N is the number of

Detecting fluid flows with bioinspired hair sensors

Creator:: Dickinson, Benjamin T.
Abstract:: Many animals detect prey or enhance their locomotion with information from hair-like receptors that are activated by local fluid flows. The utility of biological hair receptors has motivated the design of artificial hair sensors (AHS) for flow control applications where aerodynamic or hydrodynamic forces play a significant role in the...
Resource Type:: Dissertation
Full Text:: . 5 THE DETECTION OF UNSTEADY FLOW SEPARATION WITH BIOINSPIRED HAIR-CELL SENSORS B. T. Dickinson, J

The fracture toughness of medium density fiberboard and other fiber bridging composites

Creator:: Matsumoto, Noah T.
Abstract:: In many composites, fiber bridging develops as part of the fracture process. Fiber bridging invalidates many toughness evaluation methods such as the ASTM E399 and complicates the identification of crack length, which is a necessary parameter in energy methods. In order to measure the toughness of fiber bridging composites, an...
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF Noah T. Matsumoto for the degree of Master of Science in

Quantification of total and plastic 3D strain fields within micro-damaged polyurethane foam

Creator:: Sutton, Matthew T.
Abstract:: Local material damage that occurs within cellular solids, such as polymer foams and trabecular bone, and precedes local fractures of the cell struts or walls is called micro-damage. The accumulation of micro-damage within cellular solids is often undesirable, although it is thought to be vital to the development and health...
Resource Type:: Masters Thesis
Full Text:: T. Sutton for the degree of Master of Science in Mechanical Engineering presented on December 9

Investigations into the effects of a vibrating meniscus on the characteristics of drop formation

Creator:: Lewis, Kevin T.
Abstract:: As drop-on-demand (DOD) applications continue to gain ground in desktop inkjet-printing, 3D printing, fluid mixing, and other areas the demand for higher frequency operations are beginning to push against the current physical boundaries in DOD technology. The current research is exploring the possibility of controlling drop volume and velocity at...
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF Kevin T. Lewis for

Feasibility of Lorentz mixing to enhance combustion in supersonic diffusion flames

Creator:: Nahorniak, Matthew T.
Abstract:: The purpose of this research was to determine if it is feasible to apply Lorentz mixing to supersonic diffusion flames, such as those found in SCRAMjet engines. The combustion rate in supersonic diffusion flames is limited by the rate at which air and fuel mix. Lorentz mixing increases turbulence within...
Resource Type:: Masters Thesis
Full Text:: ) 2 ( dv du T = # 2 (2.10) 3 \ dy dx j 7 du dv\ Z (2.11) dx1(9Y The heat conduction terms

Experimental development and characterization of a small-scale planar flow casting (PFC) machine

Creator:: Smith, Mark T.
Resource Type:: Masters Thesis
Full Text:: AND CHARACTERIZATION OF A SMALL-SCALE PLANAR FLOW CASTING (PFC) MACHINE by Mark T. Smith A THESIS

Optical sensing and metrology for on-machine surface inspection in manufacturing processes

Creator:: Lee, Eddie T.
Abstract:: Optical sensing technologies are pivotal in the manufacturing process, specifically in defect detection, tool condition estimation, and monitoring. The research aims to enhance the accuracy, efficiency, and reliability of manufacturing metrology by employing optical sensing technologies, such as laser profilometers and image processing techniques. The dissertation proposes intelligent and flexible...
Resource Type:: Dissertation
Full Text:: in spatial domain Statistical features Definition Mean Gm = 1 NxNy Ny∑ j Nx∑ i |g(xi, yj

Elastic, plastic, and total strains in human and porcine pedicle trabecular bone and PU-foam after pedicle screw insertion by utilizing functional micro-CT imaging

Creator:: Moran, Sean T.
Abstract:: Pedicle screw breakage and loosening remain as clinical complications of short segment instrumentation procedures for spinal stabilization. This study has directly visualized and measured elastic, plastic and total vertebral pedicle trabecular bone full-field strains in the regions immediately surrounding the pedicle screw during pedicle screw insertion by utilizing functional microCT...
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF Sean T. Moran for the degree of

Monitoring and diagnosis of a multi-stage manufacturing process using Bayesian networks

Creator:: Wolbrecht, Eric T.
Abstract:: This thesis describes the application of Bayesian networks for monitoring and diagnosis of a multi-stage manufacturing process, specifically a high speed production part at Hewlett Packard. Bayesian network "part models" were designed to represent individual parts in-process. These were combined to form a "process model", which is a Bayesian network...
Resource Type:: Masters Thesis
Full Text:: process using Bayesian networks AN ABSTRACT OF THE THESIS OF Eric T. Wolbrecht for the degree of Master

The Applicability of Linear Elastic Fracture Mechanics to Compressive Damage of the Carbon Fiber Reinforced Plastic Matrix

Creator:: Carpenter, Kevin T.
Abstract:: With the widespread replacement of aluminum with composite materials, particularly in aircraft structures, the lack of comprehensive understanding of these materials is unsettling. The complex nature of these materials, with respect to isotropic aluminum, makes the prediction of their mechanical response equally complex. The failure of carbon fiber reinforced plastic...
Resource Type:: Masters Thesis
Full Text:: the J-integral calculation from Digital Image Correlation (DIC) or strain gauges on the specimen

Rapid Prototyping of Rigid & Flexible Microfluidic Devices Using Low-Cost Materials and Maker Tools

Creator:: Co, Megan T.
Abstract:: Microfluidics is an evolving field that focuses on the manipulation of small fluid volumes. Because of its micron-sized features, it is the basis for many lab-on-chip and point-of-care diagnostic devices. The devices are predominantly molded from polydimethylsiloxane (PDMS); however, production is a multi-hour or multi-day process that typically requires clean...
Resource Type:: Honors College Thesis
Full Text:: , aip.scitation.org/doi/10.1063/1.3689939. Sia, Samuel K., and Kricka, Larry J. “Microfluidics and Point-of-Care

A methodology for iterative design using physical test data

Creator:: Morris, Wesley T.
Abstract:: This thesis addresses a common knowledge gap that was identified amongst the Society of Automotive Engineers (SAE) competition design teams at Oregon State University. Students that join the SAE teams at Oregon State University typically do not have experience using physically collected data during a design process. This leads to...
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF Wesley T. Morris

Particulate and total gaseous hydrocarbon emissions from a gas heated veneer dryer

Creator:: Shigehara, Roger T.
Abstract:: A source test was conducted to determine the particulate and the total gaseous hydrocarbon emissions from a gas heated veneer dryer. Samples were taken on eight separate days from the exhaust stacks while the dryer was processing Douglas fir veneer. Of the eight days, three was used to determine the...
Resource Type:: Masters Thesis
Full Text:: wife, Janet, for the encouragement and help given to me. R. T. S. TABLE OF CONTENTS INTRODUCTION

Evaluation of Adoptability : The Iterative Development of an Energy Production Device for the Middle School Classroom

Creator:: Heck, Samuel T.
Abstract:: This study conducts follow up research to my Mechanical Engineering Senior Project that was completed in March 2015. It follows the Student Powered Hydro and Entertainment Device (SPHED) as it is used in various middle school and high school classrooms. SPHED has three modules: a power generation module, a hydropower...
Resource Type:: Honors College Thesis

A model for the mechanical behavior of irradiated mixed carbide sphere pac fuel pins

Creator:: George, Thomas L.
Abstract:: A model is developed that allows the prediction of the stress-strain distribution in a mixed carbide sphere pac fuel pin during irradiation. The model is coupled with a previously developed model for the thermal behavior of the pin. The one-dimensional (radial at various axial locations) solution is for quasi-steady pin...
Resource Type:: Dissertation
Full Text:: Behavior of Irradiated Mixed Carbide Sphere Pac Fuel Pins Abstract approved: Redacted for Privacy T. L

An investigation of the effects of radial acceleration on a fluidized bed used for filtration of air-borne particulate of submicron size

Creator:: Junge, David C.
Resource Type:: Dissertation
Full Text:: respect to fluidized beds. Doctoral Committee: R. W. Boubel, J. Go Mingle, F, a Schaumburg, L. D. Calvin

Thermal annealing of Mo/Si multilayers to assess the stability relevant to soft x-ray projection lithography

Creator:: Viliardos, Michael A.
Resource Type:: Masters Thesis
Full Text:: j- i n i n * - • > - C D C D r ^ r ^ - i n o Is - 0 0 C D -< fr C O C O T - e n O

Evaluation of copper to superconductor area ratio measurement techniques for niobium-titanium composite superconducting wire

Creator:: Pyon, Taeyoung
Abstract:: Measurement of the copper to superconductor ratio (Cu/SC) in composite superconducting wires is necessary for process control, quality assurance, and characterization of the final wire properties. A comparison has been made of three techniques for measuring the Cu/SC ratio on a set of commercial wires produced for the Superconducting SuperCollider...
Resource Type:: Masters Thesis
Full Text:: completed. Sincere appreciation is extended to the members of my graduate committee: Dr. T. C. Kennedy, Dr

Lateral fluid motion in nucleate boiling through asymmetric surface structures

Creator:: Kapsenberg, Florian
Abstract:: This thesis presents a feasibility study of a means to passively effect liquid motion parallel to a heated surface though surface geometrical modifications. Such a passive system is beneficial for electronics cooling applications as it reduces the pumping equipment normally required in flow loops and is desired for space applications,...
Resource Type:: Masters Thesis

Optimization of staged rankine energy conversion cycles for high efficiency

Creator:: Simmons, Larry Dean
Abstract:: Because of the fuel crisis and problems associated with thermal pollution there is new impetus and urgency for developing more efficient energy conversion systems for power generation. A preliminary analysis was undertaken to determine the potential of staged Rankine cycle systems for substantially higher efficiency. It was necessary to optimize...
Resource Type:: Dissertation
Full Text:: approved: Redacted for privacy -Dr. R. J. Zaworski Because of the fuel crisis and problems associated with

An investigation of slumping behavior in cold-phase fluidized bed

Creator:: Chao, Hsiao-hwa
Abstract:: The objective of this research project was to investigate, both qualitatively and quantitatively, the behavior of materials in partially slumped fluidized beds. View windows along the side of the experiment facility made visual observations of bed profiles possible. These observations were recorded on movie films showing the effects of variations...
Resource Type:: Masters Thesis
Full Text:: " I.D. 5" J- 1 8 1 'I 8 4" 241/2' Fig. 7. Dimensions of the venturi. 8" 2" O.D. 0 11 Fig. 8

Thin Film Bi-based Perovskites for High Energy Density Capacitor Applications

Creator:: Shear, Colin David
Abstract:: Pulsed laser deposition was used to create 0.1-Bi(Zn₀.₅ Ti₀.₅)O₃-0.9-BaTiO₃ (BZT-BT) thin films to examine the effects of laser energy (2.25 or 2.5 J/cm²) , pulse frequency (2 Hz or 5 Hz), and deposition temperature (550, 600, 650, and 700°C) on the electrical properties of the films. These effects were analyzed...
Resource Type:: Honors College Thesis
Full Text:: ) .....__,____._ __ .__....___._ __ .__......___. 0.0 M O ) 00 :lS(J • SO T!K ) • very broad e'{T

Fracture toughness of void-site-filled skutterudites

Creator:: Eilertsen, James S.
Abstract:: Thermoelectric materials are playing an increasingly significant role in the global effort to develop sustainable energy technologies. Consequently, the demand for materials with greater thermoelectric efficiency has stimulated the development of state-of-the-art interstitially doped skutterudite-based materials. However, since intermetallics are often embrittled by interstitial substitution, optimal skutterudite-based device design, manufacture,...
Resource Type:: Masters Thesis
Full Text:: Applied Physics 2002, 92 (12), 7236- 7241. 18. He, T.; Chen, J.; Rosenfeld, H. D.; Subramanian, M

Assessing cogeneration feasibility in institutional facilities

Creator:: Van Holde, David J.
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF David J. Van Ho lde for the degree

Polycarbonate as a photoplastic stress freezing material

Creator:: Broderick, John Justin
Abstract:: Dead weight creep tests were conducted on polycarbonate in order to determine if it is a linear viscoelastic material; or if it is not, then to determine the feasibility of photoplastic stress freezing. Secondary objectives were: the determination of the parameters in the creep compliance of a four element viscoelastic...
Resource Type:: Masters Thesis
Full Text:: . J. Dahlke of the Mechanical and Nuclear Engineering Department for suggesting this project and for

Temperature profiles, thermal diffusion factors, and molecular diffusion coefficients for flow-coupled diffusion in a two-dimensional flow field

Creator:: Laity, Walter William
Resource Type:: Dissertation
Full Text:: -Dimensional Flow Field Abstract approved: . Redacted for Privacy r. . J. Zaworski The results of an

Off-design analysis and control of a wood-fired combined-cycle power plant

Creator:: Brawn, Robert Charles
Abstract:: This report presents the off-design analysis of various wood-fired combined-cycle power plants using a computer model to simulate plant performance. The combined-cycle systems investigated are characterized by having a woodfueled combustor, an indirect-fired gas turbine, and a Rankine steam cycle. This work was conducted as part of a larger biomass...
Resource Type:: Masters Thesis
Full Text:: June 1985 APPROVED: , Redacted for Privacy Associ t Pkofessor of Mechanical Engineering in Lige

A determination of an exhaust hydrocarbon reactivity index for a vehicle powered by gasoline and liquefied natural gas

Creator:: Rossman, David Robert
Abstract:: Past research has shown that automobile exhaust is composed of a mixture of many different hydrocarbons and that some of these hydrocarbons contribute more to the smog problem than others. Natural gas has been proposed as an alternative to gasoline as a motor fuel, and it was desired to confirm...
Resource Type:: Masters Thesis
Full Text:: - oC 00 4= . 0 0 0 0 0 a a i 1- -. IV iP > O N 00 0 N ) 0 0 0 0 0 0 I I a I I J t

A thermodynamic study of energy absorbed by a motored four cycle engine with positive exhaust pressure as applied to commercial exhaust brakes

Creator:: Thompson, Ralph Allen
Resource Type:: Masters Thesis
Full Text:: HORSE! OWER! ~! J ........1'. J."lo Am lnlillT lc;T PRJ tssrJR.E: / / / /// /1 / V

Design considerations for strain gage transducers

Creator:: Smith, Harlan Bradford
Abstract:: Design considerations are presented which apply to all types of electrical resistance strain gage transducers. While the concepts apply to mass produced transducers, the information should be most useful for the engineer or technician who designs one-of-a-kind or "home-made" transducers. Errors which affect the accuracy of strain gage transducers are...
Resource Type:: Masters Thesis
Full Text:: adjacent pairs of gages (i. e., gages C and T, Figure 1) to similar temperature conditions. Maintain

Experimental studies of a partially defluidized bed with immersed heat exchange tubes

Creator:: Sitthiphong, Norkun
Abstract:: The object of this research study is to investigate and provide some fundamental information about bed slumping in a partially defluidized bed combustor. Due to the difficulty in making measurements and observations at high temperature, a dynamically similar cold phase fluidized bed was used to model the high temperature case....
Resource Type:: Dissertation
Full Text:: tube (m) d p surface mean particle size (11) D reference particle size (.0 D t bed diameter (m) D

Numerical analysis of liquid cooling by natural convection for heated protusions simulating vertical plate-mounted electronic components facing an opposing plate

Creator:: Park, Sung-kwan
Resource Type:: Dissertation
Full Text:: major advisor, Dr. Dwight J. Bushness, for his consistent support and guidance during my period of

Power performance of planing boats with the effect of propeller selection and propeller guard design

Creator:: Ladd, Daniel M.
Abstract:: One of the unique problems associated with salmon gillnet fishing is of preventing the fouling of the boat's propeller in the net and associated fishing gear. Presently, the solution to this problem has been the addition of a basket type propeller guard which may produce a drag increase of 50...
Resource Type:: Masters Thesis
Full Text:: , from which T = J n D V - w) TR f(v) (1 - t) (1 t) where f(v) is a relationship such as shown in

A study of bubble size in a large particle fluidized bed at elevated temperatures

Creator:: Hockman, Jeffrey Nathan
Abstract:: The literature cites several examples of investigations made concerning the size of bubbles rising in small particle fluidized beds at room temperature. In many practical applications, however, fluidized beds require the use of large particles at very high temperatures. Despite this fact, little information has been reported on bubble size...
Resource Type:: Masters Thesis
Full Text:: professor, Dr. Dwight J. Bushnell for his invaluable guidance and input toward the completion of this

An experimental investigation of combustion products through a flat, laminar, pre-mixed hydrocarbon-air flame

Creator:: Brenchley, David Lee
Abstract:: Flat, laminar, premixed hydrocarbon-air flames were stabilized on a porous-plate burner. In addition to temperature profiles, concentration profiles were measured for methane, ethane, ethylene, propane, acetylene, propylene, carbon monoxide, carbon dioxide and oxides of nitrogen. Dead space thickness, luminous flame zone thickness and hydrocarbon disappearance point responses were also monitored....
Resource Type:: Dissertation
Full Text:: Redacted for privacy Dean of Graduate School Date thesis is presented t- ,/',ç i i / J -'l Typed by

A photoelastic stress analysis of a beam under shear and compressive loads

Creator:: Bitting, Kenneth Robert
Abstract:: The determination of failure is complicated when a structural element is subjected to combined rather than simple stresses. This is especially true when the principle of superposition does not apply. For such cases, tests of the element under the expected loads are required to determine its failure criteria. In this...
Resource Type:: Masters Thesis
Full Text:: ANALYSIS OF A BEAM UNDER SHEAR AND COMPRESSIVE LOADS", Redacted for Privacy Abstract approved: Dii. H/-j

A rapid method for determinations of nitrogen oxides in engine exhaust gas

Creator:: Johnson, Douglas Edward
Resource Type:: Masters Thesis
Full Text:: Aecpnos Si o s o wa,.ei.ni, Ci) ' F IGUFE. A ¡O t'.i co mctENm (1/ p?LOG L / J OF NO AND NO4

Analysis of an externally loaded prestressed cylindrical shell

Creator:: Webb, Gerald Bruce
Abstract:: The concept of a prestressed cylindrical shell was investigated. In particular, a cylindrical shell constructed from coiled pressurized tubing was analyzed. This analysis was concentrated in two main areas, the first involved the failure modes of the prestressed cylinder. Both the buckling and yielding behavior of the tube walls was...
Resource Type:: Masters Thesis
Full Text:: ) Poisson's Ratio t Thickness (inches) Radial Deflection (inches) R Mean Cylinder Radius (inches) Mean

A numerical study of the thermal performance for surface mounted and through-hole mounted integrated circuits

Creator:: Wang, Jyi-Ren
Resource Type:: Masters Thesis
Full Text:: ) G Heat generation per unit volume (Watt/m3) t Time (second) T Temperature ( °C) a Thermal

Investigation of combustor and fuel preparation requirements for a combined-cycle wood fired power plant

Creator:: Bauer, Timothy Lee
Abstract:: The Pacific Northwest is a particularly good candidate for a power plant fired with wood since the wood products industry is so important in the area. The combined cycle concept for such a plant has increased in popularity due to the generally greater efficiency of the gas turbine part of...
Resource Type:: Masters Thesis
Full Text:: Redacted for Privacy Abstract approved: , Wight J. Bushnell The Pacific Northwest is a particularly good

An optimal design method for an air-heating solar energy collector

Creator:: Grill, Alan Richard
Abstract:: Some desirable features of a solar energy collector are listed and a collector design is presented which incorporates their features. As the collector is operated, air flows within the collector enclosure and is heated as it passes through a porous radiant energy receiver mounted in the enclosure. The porous energy...
Resource Type:: Masters Thesis
Full Text:: Energy Collector Redacted for Privacy Abstract approved: pro-- J. 1nshnell Some desirable features of

An experimental study of natural convection from protruding arrays on a vertical plate with and without an opposing wall for various fluids

Creator:: Lin, Peng-cheng
Resource Type:: Dissertation
Full Text:: Abstract approved: /Dwight J. Bushnell Natural convection from six rectangular protruding heated arrays

An experimental investigation of laminar natural convection with a uniformly heated vertical cylinder in mercury

Creator:: Wiles, Lawrence E.
Resource Type:: Masters Thesis
Full Text:: UNIFORMLY HEATED VERTICAL CYLINDER N MERcUU Redacted for privacy Dr. 'J. R. Welty An experimental

An experimental study of natural convection heat transfer from a horizontal cylinder array vertically aligned to and confined by a single wall and two walls

Creator:: Al-Alusi, Thamir R.
Abstract:: Convection heat transfer was experimentally investigated for two different geometries. One case had three horizontal cylinders in a vertical plane placed between two vertical walls. The second case had three horizontal cylinders in a vertical plane with only one vertical wall. Several different cylinder center-tocenter spacings were investigated. The wall...
Resource Type:: Dissertation
Full Text:: and Two Walls A hdract nvins7nRwl Redacted for privacy v7 Dwight J. Bushnell Convection heat

Experimental investigation of wood combustion and combustion profiles in a cylindrical combustion chamber

Creator:: Dadkhah-Nikoo, Abbas
Abstract:: This study presents the results of an experimental investigation of wood combustion. Variables chosen for investigation were fuel feed rate, fuel moisture content, fuel particle size, excess air, fraction and temperature of under-fire air. Data recorded during the experiments included the composition and temperature of the combustion products in the...
Resource Type:: Dissertation
Full Text:: parents. ACKNOWLEDGEMENTS A special thanks to my major advisor, Dr. Dwight J. Bushnell, for his help

Analysis of wood combustion and combustion systems for a combined cycle wood-fired power plant

Creator:: Dadkhah-Nikoo, Abbas
Abstract:: This report presents the study of wood combustion and combustion systems for a combined cycle wood-fired power plant. The power plant consists of a twin air cycle and a single steam cycle. The fuel for this power plant is wood and wood waste with particle size in the range of...
Resource Type:: Masters Thesis
Full Text:: , Dwight J. Bushnell Abstract approved: This report presents the study of wood combustion and combustion

Operation of a High-Temperature Oxidation Reactor for Thermochemical Energy Storage

Creator:: Ramsey, Owen C.
Abstract:: The cost of long-duration energy storage poses one of the most significant limitations on the penetration of renewables into power grids. Thermochemical energy storage has great potential to reduce this cost through the use of a reversible redox reaction pair that has a high enthalpy of reaction. The chemical nature...
Resource Type:: Masters Thesis
Full Text:: . Abstract approved: ______________________________________________________ Nick J. AuYeung The

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