Index Catalog // ScholarsArchive@OSU

Kinematic analysis of walking machine foot trajectory

Creator:: Su, I-chih
Abstract:: A method to design foot trajectory in Cartesian coordinates for a six-leg walking machine is presented in this thesis. The walking machine is based on the geometry of the darkling beetle. The walking procedure developed by Y.S. Baek is introduced first to provide step length and leg swing time for...
Resource Type:: Masters Thesis
Full Text:: ABSTRACT OF THE THESIS OF I-Chih Su for the degree of Master of Science in Mechanical Engineering

Computer assisted design of planar workholders

Creator:: Chancharoen, Ratchatin
Abstract:: There are many situations in which contact between two bodies is at a single point so there can be no tensile (force). This form of contact only provides a single degree of restraint, and is defined as a unidirectional point contact. The analysis of Reuleaux shows that four suitably placed...
Resource Type:: Masters Thesis
Full Text:: which contact between two bodies is at a single point so there can be no tensile (force). This form of

Mechanical design history content : the information requests of design engineers

Creator:: Kuffner, Tom A.
Abstract:: This thesis reports on research conducted to determine the information which should be included in a mechanical design history. This is part of a larger research effort aimed at developing a computer tool for storing and replaying mechanical design history information. Three question-asking protocols were conducted to determine what information...
Resource Type:: Masters Thesis
Full Text:: Electronic Design Notebook -- Performing Medium and Processing Medium". This is a report on the development

A study of thermal stratification in the cold legs during the subcooled blowdown phase of a loss of coolant accident in the OSU APEX Thermal Hydraulic Testing Facility

Creator:: Wachs, Daniel M.
Abstract:: The phenomena of interest in this work is the thermal stratification which occurs during the early stages of a loss of coolant accident (LOCA) in the OSU APEX Thermal Hydraulic Test Facility, which is a scaled model of the Westinghouse AP600 nuclear power plant. Thermal stratification has been linked to...
Resource Type:: Masters Thesis
Full Text:: report; Determined the causes of thermal stratification in the cold legs of the Westinghouse Advanced

An Engineering Decision Support System (EDSS) with alternative-criterion pair evaluations

Creator:: Herling, Derald E.
Abstract:: An Engineering Decision Support System, EDSS, was developed using Bayesian mathematics which incorporates knowledge and confidence components observed in alternative-criterion pair decision making. The separation of knowledge and confidence has been previously unaccounted for in decision-making methods. EDSS provides decision support to individuals or teams which must make choices between...
Resource Type:: Dissertation
Full Text:: Mechanical Engineering Head of Department of Mechanical Engineering Dean of Gradua/School I understand that

An experimental/analytical investigation of buoyant jets in shallow water

Creator:: Hsiao, Entsung
Abstract:: This thesis presents the results of an experimental and analytical study of single-port buoyant turbulent jets discharged into shallow water. The experimental results include the measured downstream dilution, centerline concentration and trajectory. Independent parameters considered were Froude number, submerged depth, discharge angle and velocity ratio. Results indicate that decreasing the...
Resource Type:: Dissertation
Full Text:: ambient currents are present. The analytical portion of this report presents an integral method proposed

Robustness of uncertain systems : globally optimal Lyapunov function

Creator:: Ahmadkhanlou, Fariborz
Abstract:: The Lyapunov direct method is utilized to determine the robustness bounds for nonlinear, time-variant uncertainies p[subscript i]. Determination of the robustness bounds consists of two principal steps: (i) generation of a Lyapunov function and (ii) determination of the bounds based on the generated Lyapunov function. Presently in robustness investigations, a...
Resource Type:: Dissertation
Full Text:: are in the form X=Anx+E piAix . i -1 The Lyapunov direct method is utilized to determine the

Laminar microchannel cooling of integrated circuits

Creator:: Lienau, Jeffrey Jay
Abstract:: Liquid cooled, laminar microchannel heat sinks were earlier proposed by Tuckerman for cooling high heat generating integrated circuits and high power microwave generation systems using photoconductive switches. A method of computationally analyzing the heat sinks is presented which produces the desired temperature and velocity distributions within the heat sinks. The...
Resource Type:: Masters Thesis
Full Text:: temperature profiles in cases at or near the optimum design as determined by the methods in this report

Critical current distributions and the V(1) transition in Nb-Ti superconducting composites

Creator:: Narang, Girish
Abstract:: It is well established that the extended range V(I) transition behavior in filamentary superconducting composites depends strongly on the processing conditions of the composite. Based on previous work, a model proposed by Warnes et al predicts that the second derivative of the V(I) transition is related to a more fundamental...
Resource Type:: Masters Thesis
Full Text:: , the current at which the slope of the V(I) no longer remains zero. 2.3 PRACTICAL SUPERCONDUCTORS

A simplified dynamic model of the hind leg of a beetle during step initiation

Creator:: Mallysetty, Venkata Ramana
Abstract:: This thesis investigates a simple dynamic model of the hind leg of a beetle during initiation of a step. The primary assumption was that the full load of the body was carried on the hind leg during this time. That is, the only forces on the body were that of...
Resource Type:: Masters Thesis
Full Text:: (91+02) Y2 = lisinO, 12sin(01 +92) ).(2 = 1 As i nO, + 12(6142) sin (91 A) Y2 = lielcosO, 12(6142

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:: To: My first and best teachers, who sacrificed their dreams so that I could achieve mine; My

An experimental study of the fluid mechanics of filling a small part of modular mold

Creator:: Miller, Mark Wade, 1967-
Abstract:: Investment casting has been an important form of metal casting for many years, but little is understood about the fluid flows that occur during mold filling. A key to quality castings is the understanding and control of the fluid flows that are present when the mold is filled with molten...
Resource Type:: Masters Thesis
Full Text:: for Privacy Dean of Gradu School (I Date thesis is presented May 1, 1991 Typed by Mark Miller for

A study of ignition and propagation of combustive synthesis reaction between titanium and carbon

Creator:: Hernandez-Guerrero, Abel
Abstract:: Combustive Synthesis or Self-Propagating High-Temperature Synthesis (SHS), is an energy-efficient combustion method of producing metallic, ceramic and composite materials from their constituent powders. This thesis presents the results of an experimental and numerical evaluation of the propagation velocity for the SHS solid-solid reaction of titanium and carbon, as well as...
Resource Type:: Dissertation
Full Text:: ignition will always occur and below which no ignition is possible. A Study of Ignition and Propagation

A theoretical and experimental study of self-propagating high-temperature synthesis of titanium carbide

Creator:: Huque, Ziaul
Abstract:: Self-propagating high-temperature synthesis (SHS) is a new method of producing advanced ceramic materials and offers an attractive alternative to conventional methods of materials processing. An experimental investigation was carried out to determine the SHS reaction wave propagation speed in a vertical cylindrical compact made from a mixture of titanium and...
Resource Type:: Dissertation
Full Text:: better agreement with the experiments. Results showed no significant effect of heat loss on the

A computer imaging method for fluid motion studies in metal casting

Creator:: Poland, John H.
Abstract:: Significant reductions in the number of defects in parts produced by investment casting can be obtained by improving the flow of the molten metal during pouring. Studies have been done at Oregon State University with simulated casting techniques to determine optimal mold configurations. Better mold layouts have been shown to...
Resource Type:: Masters Thesis
Full Text:: 1.6 967 1.6 1120 9 SP 495 1.4 802 1.4 1 1550 12 SP 496 2.0 875 2.6 i 830 7 SP 497 1.5 848 1.5 1 1440

Thermal characterization technique for thin dielectric films

Creator:: Indermuehle, Scott W.
Abstract:: A phase sensitive measurement technique that permits the simultaneous determination of two independent thermal properties of thin dielectric films is presented. Applying the technique results in a film's thermal diffusivity and effusivity, from which the thermal conductivity and specific heat can be calculated. The technique involves measuring a specimen's front...
Resource Type:: Masters Thesis
Full Text:: specific heat of a thin film from phase information alone, with no need for signal magnitude. This

An experimental study on the use of inclusion trapping devices for investment casting

Creator:: Buckingham, Ronald W.
Abstract:: A problem facing the casting industry is inclusions in the finished parts. The inclusions can be sand from the molds, oxides or other impurities in the metal charge. Inclusions lead to costly part repairing or reworking. A study was done to try and find inclusion trapping devices that could be...
Resource Type:: Masters Thesis
Full Text:: efficiency of the trapping device was determined from the end location of the inclusions. No work was done on

Design of advanced aluminum silicon alloy compositions and processing

Creator:: Li, Xiao, 1963-
Abstract:: Part I discusses the development of an aluminum-magnesium-silicon alloy that may combine strength, extrudability, favorable corrosion resistance with low cost and scrap compatibility. The first part of the study determined the effects of small composition, heat treatment and mechanical processing changes on the ambient temperature tensile properties of the alloy....
Resource Type:: Dissertation
Full Text:: And Processing Abstract approved: Michael E. Kassner Part I discusses the development of an

Improving part load efficiency of screw air compressors

Creator:: Maxwell, Jonathan B.
Abstract:: Air compressor systems are inefficient energy transfer devices even under the best of conditions, at full load. When only part load is required, efficiency drops further. This thesis attempts to improve part load efficiency of twin rotor screw air compressors in three ways. First, a guidebook was written to help...
Resource Type:: Masters Thesis
Full Text:: privacy Redacted for privacy ACKNOWLEDGEMENT I would like to thank the Bonneville Power

An analysis of peripheral milling of finger-joints in ponderosa pine cut-stock

Creator:: Liu, Yongsheng
Abstract:: To make low grade lumber into high-valued products, finger-jointing is a widely used method in the timber industry. In certain situations, chip-out occurs degrading the quality of the joint. To better understand the machining process, a beam-type dynamometer based on strain gages was designed to analyze the dynamic cutting forces...
Resource Type:: Masters Thesis
Full Text:: . The occurrence of chip-out is dependent on the fiber angle and the chip thickness. No relationship

Micromechanics of heterogeneous materials under compressive loading

Creator:: Laird, George
Abstract:: In mining and mineral processing, compressive loading is often encountered during the comminution of ore bearing minerals and in the wear resistant materials used in the comminution circuit. A common thread joining many of the materials that are primarily used under compressive loading is the presence of a high modulus...
Resource Type:: Dissertation
Full Text:: are primarily influenced by three factors: (i) the nature of the imperfect interface, (ii) the moduli

Solid/liquid phase change in small passageways : a numerical model

Creator:: Coven, Patrick J.
Abstract:: During the operation of phase-change ink-jet printers a bubble formation phenomenon often occurs. These bubbles are detrimental to the operation of the printer and substantial efforts are made to remove them. The objective of this research was 1: to develop a fundamental understanding of how bubble or void formation occurs...
Resource Type:: Masters Thesis
Full Text:: Privacy Redacted for Privacy Redacted for Privacy ACKNOWLEDGEMENT I would like to thank Professor

Nonlinear adaptive control of highly maneuverable high performance aircraft

Creator:: Cho, Sul
Abstract:: This thesis presents an effective control design methodology using a one-step-ahead prediction adaptive control law and an adaptive control law based on a Lyapunov function. These control law were applied to a highly maneuverable high performance aircraft, in particular, a modified F/A-18. An adaptive controller is developed to maneuver an...
Resource Type:: Dissertation
Full Text:: no 21 0 21 21". 1zz C4oPy, c4orze c63pze C63Pye = (2.3.57)r17 I I Izz Ixx lxx 2.4 Longitudinal

Buoyant flow simulation programs with interactive graphics

Creator:: Hoevekamp, Tobias B.
Resource Type:: Masters Thesis
Full Text:: to Flowing Stratified Ambients," Oak Ridge, Oak Ridge National Laboratory, Report No. ORNL-4685, 36p

Two-phase fluid break flow measurements and scaling in the advanced plant experiment (APEX)

Creator:: Pimentel, David Alan
Abstract:: The Oregon State University (OSU) Advanced Plant Experiment (APEX) is a one-fourth height, one-half time scale, reduced pressure integral systems test facility designed to model the long-term cooling capabilities of the emergency core cooling systems of the Westinghouse AP600. This study provides a brief description of the APEX test facility,...
Resource Type:: Masters Thesis
Full Text:: Gradua chool I understand that my thesis will become part of the permanent collection of Oregon State

Natural convection cooling of vertical plates in an enclosure : a numerical simulation

Creator:: Destremau, Axel
Resource Type:: Masters Thesis
Full Text:: I would like to thank very much my major professor, Dr. James R. Welty, for his constant

Properties of a niobium-titanium multilayer thin film

Creator:: Norris, Jeffrey A., (Jeffrey Alan), 1965-
Resource Type:: Masters Thesis
Full Text:: , they would have made no sense to me. I also appreciate the advice he gave that helped me get this

Sampling submicrometer particles suspended in near sonic and supersonic free jets of air

Creator:: Martone, Joseph Arthur
Abstract:: This experiment is concerned with sampling submicrometer particles in near sonic and supersonic flows. The study employed a high volume condensation aerosol generator to produce stearic acid particles having a geometric mean diameter of 0.8 μm and a geometric standard deviation of 1.28. The aerosol was diluted with dry air...
Resource Type:: Dissertation
Full Text:: for Joseph Arthur Martone ACKNOWLEDGEMENTS I wish to express my thanks to the members of my

Assessing cogeneration feasibility in institutional facilities

Creator:: Van Holde, David J.
Resource Type:: Masters Thesis
Full Text:: Mechanical Engineering Dean of Grad it School I understand that my thesis will become part of the permanent

Enhanced sensors for vehicle dynamics evaluation

Creator:: Baratange, Francois
Abstract:: Vehicle dynamics evaluation is divided in two domains: ride quality and handling. The evaluation of characteristics related to both of these domains requires the knowledge of the vibrations developed by the vehicle. Vibrations can be described by acceleration, velocity or displacement (linear or angular). The inertial properties of large vehicles...
Resource Type:: Masters Thesis
Full Text:: Dean of Graduate School I understand that my thesis will become part of the permanent collection of

Residual strength properties of Gr/BMI composite laminates after constant/cyclic compression

Creator:: Shenoy, Krishnananda
Resource Type:: Masters Thesis
Full Text:: Residual Strength [I] were recently reported. This report focuses on a description of the experimental

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:: of Mechanical Engineering Dean of the Gradate School I understand that my thesis will become part

Fully developed laminar natural convection in a vertical parallel plate channel with symmetric uniform wall temperature

Creator:: Willie, Robert H.
Abstract:: Described in this thesis is an investigation of the fully developed natural convection heat transfer in a vertical channel formed by two infinitely wide parallel plates maintained at a uniform wall temperature. Closed-form solutions for the velocity and temperature profiles are developed along with local and averaged Nusselt numbers. The...
Resource Type:: Masters Thesis
Full Text:: Mechanical Engineering Dean of Grad School I understand that my thesis will become part of the permanent

The effect of primary alpha, nickel, and chromium on the creep properties of Ti 6242Si

Creator:: Thiehsen, Kurt
Resource Type:: Masters Thesis
Full Text:: Commencement June 1993 APPROVED: Redacted fori Privacy - i .Professor of Mechanical Engineering in charge

Ductile fracture of metals under triaxial states of stress

Creator:: Schrems, Karol Krumrey
Abstract:: Silver interlayers between maraging steel base metal were examined to evaluate mechanisms leading to ductile failure in constrained thin metals. The constraint of the maraging steel base metal during uniaxial testing of constrained thin silver results in a large hydrostatic tension component, a small von Mises effective stress, and negligible...
Resource Type:: Dissertation
Full Text:: Engineering Chair of Department of Mechanical Engineering I understand that my thesis will become part of

Computational modeling of Lorentz force induced mixing in alkali seeded diffusion flames

Creator:: Thompson, Jon Ira
Abstract:: Lorentz forces provide a unique method for the control and mixing of gas flows without the physical intrusion of objects into the flow. Lorentz forces arise when an electric current is passed through a volume in the presence of a magnetic field. The interaction between the electric current and the...
Resource Type:: Masters Thesis
Full Text:: advisor for the last two years. When this project began, I had virtually no experience in computational

Transient nonlinear deformations of viscoelastic membranes

Creator:: Jenkins, Christopher H. M.
Resource Type:: Dissertation
Full Text:: . This has the advantage that no assumption need be made as to how the stress varies over a time

Ductile facture of metals under high triaxial stress states

Creator:: Tolle, Michael C.
Resource Type:: Dissertation
Full Text:: Privacy Redacted for Privacy ACKNOWLEDGMENT I would like to thank Dr. R.S. Rosen and L. Wagner, both

Stochastic loads on horizontal axis wind turbine blades

Creator:: Freeman, Lisa Nalani
Abstract:: The objective of this work was to develop a method for determining stochastic loads on horizontal axis wind turbine blades. Stochastic loads caused by wind turbulence are a major consideration in designing for long life, cost effective wind turbines. The rotor blades are of particular concern because the blades are...
Resource Type:: Dissertation
Full Text:: School I understand that my thesis will become part of the permanent collection of Oregon State

Experimental and analytical characterization of bidirectional reflectance data for engineering materials

Creator:: Zaworski, Joseph Robert
Abstract:: Bidirectional reflectance is a fundamental property used for the analysis of radiative heat transfer. It is a form of reflectivity in which the spectral and directional dependencies of both the beam incident on a surface and the beam reflected from the surface are specified. A new system has been designed...
Resource Type:: Dissertation
Full Text:: incident partial flux (nomenclature is listed in Appendix A): , Or 4)r)px (Oi , (1)i, Or,, Or) 26(ei 4)i

Turbulence induced loads on a teetered rotor

Creator:: Weber, Timothy L.
Abstract:: Development of variable speed horizontal axis wind turbines has resulted in a need for an analysis code with a rotor speed degree-of-freedom. This study develops a five degree-of-freedom time domain computer code that evaluates blade and rotor, mean and cyclic loads with nonlinear aerodynamics together with atmospheric turbulence as a...
Resource Type:: Dissertation
Full Text:: inertia I inertia dyadic k constant kToR drive train torsional spring L lift number of turbulence

High cycle fatigue modeling and analysis for deck floor truss connection details

Creator:: DePiero, Anthony H.
Abstract:: The Oregon Department of Transportation is responsible for many steel deck truss bridges containing connection details that are fatigue prone. A typical bridge, the Winchester Bridge in Roseburg, Oregon, was analyzed to assess the loading conditions, stress levels, and fatigue life of the connection details. The analysis included linear-elastic beam...
Resource Type:: Masters Thesis
Full Text:: Department of Mechanical Engineering Dean of Gradu e School I understand that my thesis will become part

Creep of Gr/BMI composite laminates in compression

Creator:: Tyagi, Sanjeev R.
Abstract:: The main source of the time-dependent behavior of fiber-reinforced composites is their polymeric matrix, which causes concerns about their long term durability. Although for composites where organic fibers such as Graphite are used, the fibers are also a contributing factor. A composite material may exhibit an appreciable amount of creep,...
Resource Type:: Masters Thesis
Full Text:: . Acknowledgments First of all I would like to thank Dr. E.G. Wolff, my major professor, for his encouragement

Influence of laser processing on the corrosion and microstructure of zirconium based material

Creator:: Reitz, W. (Wayne)
Resource Type:: Dissertation
Full Text:: Reitz Redacted for Privacy Redacted for Privacy Redacted for Privacy ACKNOWLEDGMENTS I appreciate

An examination of point defects and atomic diffusion in silicon

Creator:: Monson, Tyrus K.
Abstract:: The self-interstitial defect is commonly regarded as important in regulating diffusion in silicon. A review of the literature reveals that the scientific bases for invoking the self-interstitial defect are weak, while an alternate defect, the vacancy cluster, has been largely ignored. One argument which has been used to establish dominance...
Resource Type:: Dissertation
Full Text:: praeter necessitatem William of Occam c.1284 - c.1350 ACKNOWLEDGEMENTS I wish to express my

A nonlocal damage theory for laminated plate with application to aircraft damage tolerance

Creator:: Nahan, Matthew F.
Abstract:: Design of commercial aircraft structure, composed of composite material, requires the prediction of failure loads given large scale damage. In particular, a fuselage of graphite/epoxy lamination was analyzed for damage tolerance given a standard large crack that severed both skin and internal structure. Upon loading, a zone of damage is...
Resource Type:: Dissertation
Full Text:: of Department of Mechanical Engineering Dean of Graduate ool I understand that my thesis will

The design capture system : capturing back-of-the-envelope sketches

Creator:: Hwang, Teng-shang
Abstract:: A system which allows the computer to capture sketches made by a mechanical designer is described. The system not only recognizes basic features as they are sketched, but it also reasons the spatial relationships between features and builds a high level abstract representation (feature model) of the artifact. The temporal...
Resource Type:: Dissertation
Full Text:: for: Teng-Shang Hwang ACKNOWLEDGEMENT I am indebted to many people who aided and encouraged me

Mechanics of Nb-Ti superconducting composites

Creator:: Guo, Zhiqiang
Abstract:: Mechanical behavior of Nb-Ti superconducting composites with copper matrices have been studied experimentally and theoretically. Experimental work includes extensive measurements of Cu/Nb-Ti composite system. Techniques for fine fiber testing and composite wire measurement have been developed. Experimental parameters examined in this research include geometry, hardness, Young's modulus, Poisson's ratio, yield...
Resource Type:: Dissertation
Full Text:: Privacy ACKNOWLEDGMENT I would like to express my heartfelt gratitude to my major advisor, Dr. William

Radiation from an infinite plane to parallel rows of infinitely long tubes - hottel extended

Creator:: Qualey, Douglas L.
Abstract:: A two-dimensional model for predicting the rate of radiation heat transfer for the interior of an industrial furnace is described. The model is two-dimensional due to the assumptions of the heat source as an infinite radiating plane and the heat sink as rows of parallel tubes that are both infinite...
Resource Type:: Masters Thesis
Full Text:: researcher for Douglas L. Qualey Redacted for Privacy Redacted for Privacy Redacted for Privacy I

A theory of product design process measurement

Creator:: Wright, Alan Louis
Abstract:: This dissertation approaches the problem of how to design process measurements by identifying process attributes which are common to all product development processes. By classifying the generic attributes of a product development process and their relationships, a framework is established which gives definition and context to individual measurements. At the...
Resource Type:: Dissertation
Full Text:: Mechanical Engineering Dean of GradiIatk School I understand that my dissertation will become part of the

Thermophysical properties and temperature response of surimi-- measurement and modeling

Creator:: Wang, De-qian
Abstract:: Freezing is one of the important technologies for preservation of foods. In this project, using surimi as a food model, thermophysical properties of frozen foods were evaluated and the freezing process was simulated using a finite element package. To measure temperature-dependent thermal conductivity, a line-source probe system was used. Effects...
Resource Type:: Dissertation
Full Text:: for DeQian Wang ACKNOWLEDGMENTS I would like to thank Charles Crapo, Fishery Industrial Technology

A study of compression loading of composite laminates

Creator:: Berbinau, Pierre J.
Abstract:: The compressive behavior of continuous fiber composites is not as well understood as their tensile behavior because research and industrial applications have until recently focused on the latter. Furthermore, most theoretical and experimental studies on the compression of composites have examined the case of unidirectional specimens with fibers along the...
Resource Type:: Dissertation
Full Text:: Mechanical Engineering I understand that my thesis will become part of the permanent collection of Oregon

Reliability centered prediction technique for diagnostic modeling and improvement

Creator:: Murphy, Michael D., 1965-
Abstract:: Design phase decisions based on diagnosability lead to lower system costs and, in turn, higher quality products by means of reducing maintenance time and increasing system reliability. A case for diagnosability is presented. Functions of diagnosability are expounded upon including life cycle costs, statistical analysis, and design criterion to emphasize...
Resource Type:: Masters Thesis
Full Text:: Engineering Dean of Gradxfrrite School I understand that my thesis will become part of the permanent

An experimental study of combined forced and free convective heat transfer to non-Newtonian fluids in the thermal entry region of a horizontal pipe

Creator:: Kim, Yong Jin, 1956-
Resource Type:: Dissertation
Full Text:: ACKNOWLEDGEMENTS I would like to express my heartfelt gratitude to Dr. James R. Welty, my major professor, who

Predicting rebound of planar elastic collisions

Creator:: Cruz-Conde Gret, Raphaël
Abstract:: Impact is a large and complex field. It embraces both structures as simple as a nail, and more complex systems, such as a car collision. A central feature of impact theory is finding the dependence between the velocities before and after impact. The transformation law of the velocities in an...
Resource Type:: Masters Thesis
Full Text:: to the tangential force Ft such that iFt I < IIIF. I Curve A, no slip; Curve B, partial slip. 20

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:: Average Area Shape Spacing Screen Report II ==I Figure 8. Overview of image processing with image

Microstructures and properties of Nb/Ti multilayered thin films

Creator:: Faase, Kenneth James
Resource Type:: Dissertation
Full Text:: Head of Department of Mechanical Engineering Dean of Gradu School I understand that my thesis will

Robustness estimation via integral liapunov functions

Creator:: Alam, Arshad
Abstract:: An investigation focusing on methods of estimation of robustness of nominally linear dynamic systems with unstructured uncertainties was performed. The algorithm proposed involves the consideration of an associated system, selection, and subsequent development, of Liapunov function candidate and integration of their derivatives along the solution trajectory. A nominally linear multi-dimensional...
Resource Type:: Masters Thesis
Full Text:: [++kount]=x; for (i=1;i<=nvar;i++) no[i][kount] =y[i]; free_dvector(dydx,l,nvar); free_dvector(y,l,nvar

Application of a bayesian network to integrated circuit tester diagnosis

Creator:: Mittelstadt, Daniel Richard
Abstract:: This thesis describes research to implement a Bayesian belief network based expert system to solve a real-world diagnostic problem troubleshooting integrated circuit (IC) testing machines. Several models of the IC tester diagnostic problem were developed in belief networks, and one of these models was implemented using Symbolic Probabilistic Inference (SPI)....
Resource Type:: Masters Thesis
Full Text:: restricted to the test head by replacing the product wafer with a metalized wafer (shorted wafer with no

Laminar natural convection in vertical tubes with one end open to a large reservoir

Creator:: Wu, Yissu
Resource Type:: Dissertation
Full Text:: Department of Mechanical Engineering Dean of Grad Schoo I understand that my thesis will become part of the

The significance and measurement of the Tsai-Wu normal interaction parameter F₁₂

Creator:: Hansen, William Christian
Resource Type:: Masters Thesis
Full Text:: dedicated by grandmother Marie Hansen, whose strength and character is inspiration to me. I would like to

A numerical and experimental investigation of rectangular abrasive jets for drilling operations

Creator:: Yin-Shing, Chong
Resource Type:: Masters Thesis
Full Text:: Department of Mechanical Engineering Dean of Gradbate School I understand that my thesis will become part

Two projectiles connected by a flexible tether dropped in the atmosphere

Creator:: Frost, Geoffrey W.
Abstract:: This study investigates the atmospheric flight dynamics of a munition system and the effect of a tether reel resistance mechanism for limiting the impact that the unreeling process has on the munition system. The munition system consisting of two projectiles connected by a tether line is released from an aircraft...
Resource Type:: Masters Thesis
Full Text:: Department, of Mechanical Engineering Dean of r auate School I understand that my thesis will become part

SketchPad for Windows : an intelligent and interactive sketching software

Creator:: Gulur, Sudheendra S.
Abstract:: The sketching software developed in this thesis, is aimed to serve as an intelligent design tool for the conceptual design stage of the mechanical design process. This sketching software, Sketch Pad for Windows, closely mimics the traditional paper-and-pencil sketching environment by allowing the user to sketch freely on the computer...
Resource Type:: Masters Thesis
Full Text:: Mechanical Engineering Chair of Department of Mechanical Engineering Dean of Graduate S I understand

Finite element simulation of heat transfer in Pacific whiting surimi paste during ohmic and conventional heating

Creator:: AbuDagga, Yaser
Abstract:: The viability of using ohmic "resistance" heating as a process alternative to inactivating the heat-stable softening enzyme in Pacific whiting surimi was investigated. A fast heating rate through the enzyme-active temperature range would reduce the damage to the gelling network in surimi-based products. Simulating the ohmic heating process in surimi...
Resource Type:: Masters Thesis
Full Text:: Engineering Dean of Gr ate School I understand that my thesis will become part of the permanent collection

A study of laser generated Rayleigh and Lamb waves in graphite/epoxy composites

Creator:: Park, Heeyong
Abstract:: The application of laser generated ultrasonics was first demonstrated in the mid-seventies and has shown good potential when applied to isotropic materials. However, its use with composite materials is still in the early stages of development. This study explores the potential for application of laser generated Rayleigh and Lamb waves...
Resource Type:: Dissertation
Full Text:: thesis is presented December 12, 1991 Typed by researcher for Heeyong Park ACKNOWLEDGMENTS I would

Range of motion of beetle body as a function of foot positions

Creator:: Foo, Chee Kit
Abstract:: This thesis presents a method for determining range of body motion for a walking machine with feet fixed on the ground. The darkling beetle was selected as the sample subject in this study. A closed form inverse kinematic solution is used to determine if a point in space is within...
Resource Type:: Masters Thesis
Full Text:: Positions Abstract approved : Redacted for Privacy Eugene i. iicnter This thesis presents a method for

Visual study of hydrodynamics in a two-dimensional gas-solid fluidized bed

Creator:: Freeman, Lisa Nalani
Abstract:: Hydrodynamic effects play important roles in fluidized bed combustion processes. Since the motion of "bubbles" is an important influence on fluidized bed heat transfer, a better understanding of their behavior is necessary for improving the design of fluidized bed boilers. Using a two-dimensional bed, silica sand particles were fluidized with...
Resource Type:: Masters Thesis
Full Text:: 0 i of Date thesis is presented May 6, 1992 Typed by Lisa N. Freeman for Lisa N. Freeman Table

Dynamics and control of a rigid/flexible manipulator

Creator:: Yeh, Chun-tien
Abstract:: Control of high-speed, light-weight robotic manipulators is a challenge because of their special dynamic characteristics. In this work, a two-stage control algorithm for the position control of flexible manipulators is proposed. First, the more complex, flexible robot system is replaced by a simplified hypothetical rigid body system (HRRA) with off-line...
Resource Type:: Dissertation
Full Text:: great pleasure that I acknowledge the inspirational guidance, encouragement and continuing advice of

An architecture for a function driven mechanical design solution library

Creator:: Wood, Stephen L.
Abstract:: The engineering design process and the advancement of future computer-aided-design systems need new design aids to be used during the conceptual design phase. This design phase is where information gathering and understanding of the problem are developed, analyzed and broken into small more manageable elements. These elements consist of customer...
Resource Type:: Dissertation
Full Text:: Chair of Department of Mechanical Engineering Dean of Graduat S ,hool I understand that my

Analysis of energy conversion systems, including material and global warming aspects

Creator:: Zhang, Mingyuan
Abstract:: With the rapid increase of the world energy demand and consumption, the method and techniques to analyze, improve and optimize energy conversion systems have to deal not only with direct fuel exergy (energy) consumption, but also with other resources, which have associated exergy consumptions, and with environmental impacts, such as...
Resource Type:: Dissertation
Full Text:: Department of Mechanical Engineering De I understand that my thesis will become part of the permanent

Evaluation of failure diagnosis in conceptual design of mechanical systems

Creator:: Ruff, David N.
Abstract:: A methodology for improving quality and reducing life cycle costs of mechanical systems is described. The principal concept is that a system can be designed, in the conceptual stages, to be easier to diagnose for failures. To perform this, functional decomposition and form to function mapping are utilized both as...
Resource Type:: Masters Thesis
Full Text:: Often however, the device that has satisfied the need or function in the past is no longer the best

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:: . Kassner and B. Rosen for all their assistance. I also wish to thank my committee members T. Kennedy, W

A computer-based design history tool

Creator:: Chen, Ai-hua
Abstract:: In current practice, design documentation often fails to support the activities of design understanding, communication, and redesign. A Design History Tool has been developed to improve current design documentation. This tool is a computerized design history that represents and plays back important information generated during the process of designing a...
Resource Type:: Dissertation
Full Text:: correcting the report is greatly appreciated. I wish to thank Dr. Robert Young for granting me the

On the lyapunov-based approach to robustness bounds

Creator:: Jo, Jang Hyen
Abstract:: The objective of this investigation is the development of improved techniques for the estimation of robustness for dynamic systems with structured uncertainties, a problem which was approached by application of the Lyapunov direct method. This thesis considers the sign properties of the Lyapunov function derivative integrated along finite intervals of...
Resource Type:: Dissertation
Full Text:: for Jang Hyen Jo ACKNOWLEDGEMENTS I would like to express sincere gratitude to my major professor

Advanced numerical modeling of the Lorentz mixing process

Creator:: Hager, Michael B.
Abstract:: There are numerous techniques for improving the mixing of fuel and oxidant species. However, many of these methods cannot be applied to combustion systems due to material limitations. A means of mixing the reacting species without physically invading the flow stream is therefore desired. In this work, induced electromagnetic forces...
Resource Type:: Masters Thesis
Full Text:: , representing Mechanical Engineering Head of Department of Mechanical Engineering Dean of Graduate School I

Monte Carlo simulation of radiation heat transfer in a three-dimensional enclosure containing a circular cylinder

Creator:: Hong, Seung-Ho
Resource Type:: Masters Thesis
Full Text:: for Privacy Redacted for Privacy ACKNOWLEDGMENTS I am especially thankful to my major professor

Model based visualization of vibrations in mechanical systems

Creator:: Jitpraphai, Thanat
Abstract:: To visualize vibrations in mechanical systems, e.g., machine tools, their movements are measured by means of suitable sensors. The signals from these sensors are processed and displayed as animated pictures on a computer screen. Accelerometers have been chosen as the most suitable sensors for this purpose. Their main advantages include...
Resource Type:: Masters Thesis
Full Text:: Mechanical Engineering Head of Department of Mechanical Engineering Dean of Gradu School I understand that

Thermal contact resistances in a thermal conductivity test system

Creator:: Schneider, Donald A.
Abstract:: The thermal contact conductance (TCC) between two machined pieces of stainless steel was studied. A guarded hot plate thermal conductivity test fixture was designed and built for the experiment. Factors investigated included the contact pressure, surface roughness, interface material and average test temperature. The contact pressure at the interface ranged...
Resource Type:: Masters Thesis
Full Text:: over the temperature range, and there is no apparent trend due to 0.6 6' 0 1 I I t I F I I I 0 20 40

Kinematic analysis of legged system locomotion on smooth horizontal surfaces

Creator:: Baek, Yoon Su
Abstract:: This thesis presents a model of legged locomotion in which position and velocity of body are directly controlled by positions and velocities of feet. One central relationship between foot acceleration, leg stroke and body velocity is developed. Procedures for determining all parameters of a step sequence including periods of constant...
Resource Type:: Dissertation
Full Text:: , 1990 ACKNOWLEDGEMENTS "Respect to heaven, don't I have a piece of shame..., respect to life, don't

Microstructural banding in thermally and mechanically processed titanium 6242

Creator:: Kansal, Utkarsh
Abstract:: Ti-6Al-2Sn-4Zr-2Mo-0.1Si specimens were shaped by repeated cycles of heating (to 954 °C) and hammer or press forging followed by a solution anneal that varied from 968 to 998 °C. The coupons were originally extracted from billets forged below the beta trans us ( 1009 °C) and slow cooled to ambient...
Resource Type:: Masters Thesis
Full Text:: Kansal ACKNOWLEDGEMENTS I would like to acknowledge financial support from U.S. Bureau of Mines, the

Processing of laser interferometric signals for small displacement measurements

Creator:: Peng, Gwo-sheng
Abstract:: Algorithms for analyzing laser interferometry signals were developed and adopted to the computer based processing of small displacement measurements. These methods, matrix operation approach and fixed parameters approach, are based on signal phase calculation and are able to replace complex fringe counting electronic circuits. The matrix operation provides an approach...
Resource Type:: Dissertation
Full Text:: : Gwo-Sheng Pend ACKNOWLEDGMENTS I would like to express my sincere gratitude to my advisor, Dr

Parameters affecting mechanical collisions

Creator:: Aum, Ho Sung
Abstract:: Even though the elastic deformations that occur during the impact of colliding bodies may be small in comparison to their actual dimensions, they play an important role in mechanical collisions. During the time the bodies are in contact, elastic, friction, and inertia properties combine to produce a complex variation of...
Resource Type:: Dissertation
Full Text:: Privacy Redacted for Privacy ACKNOWLEDGEMENTS "Where shall I begin, please your Majesty ?" she asked

Kinematics of arthropod legs : modeling and measurement

Creator:: Albright, Stephen L.
Abstract:: This thesis presents a method for determining the kinematic geometry of arthropod legs. A kinematic description makes possible the analysis of arthropod leg motion, as a prelude to investigating how various arthropod species are able to negotiate diverse terrains. Such knowledge will aid in design of legged vehicles. The focus...
Resource Type:: Dissertation
Full Text:: Redacted for Privacy Charles E. Smith I This thesis presents a method for determining the kinematic

Initial spatial motion of a rigid body on removal of one constraint

Creator:: Batra, Ajoy
Abstract:: This thesis presents a discussion of motion of a six-legged walking machine following removal of one leg constraint. To take a step, one leg must be lifted and placed at some other position. As soon as the constraint provided by the leg is removed, however the machine begins to fall....
Resource Type:: Masters Thesis
Full Text:: For Machine 120 A3 Moment of Inertia of Machine and Segments of Legs 131 LIST OF FIGURES Figure No

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:: Dean of Grad e School I understand that my thesis will become part of the permanent collection of

Computer-aided model generation and validation for dynamic systems

Creator:: Brisbine, Brian P.
Abstract:: The primary goal of any model is to emulate, as closely as possible, the desired behavioral phenomena of the real system but still maintain some tangible qualities between the parameters of the model and the system response. In keeping with this directive, models by their very nature migrate towards increasing...
Resource Type:: Masters Thesis
Full Text:: Department of Mechanical Engineering Dean of Graduate School I understand that my thesis will become part

Drilling process evaluation by predicting drilled hole quality and drill bit wear with on-line acoustic emission signals

Creator:: Wang, Kuang-Jen, 1962-
Abstract:: Improvement of manufacturing productivity is dependent on the successful automation of manufacturing processes, the success of which is based in turn upon the availability of information which describes the state of manufacturing operations. Acoustic Emission (AE) signals related to the cutting process and tool wear have been recently applied to...
Resource Type:: Dissertation
Full Text:: Mechanical Engineering Dean of Gradua School I understand that my thesis will become part of the permanent

Hydrodynamic signatures of a 2-D gas-solid fluidized bed

Creator:: Kopczynski, Sean Peter
Resource Type:: Masters Thesis
Full Text:: ACKNOWLEDGEMENT I would like to express my heart-felt appreciation to my major professor, Dr. James R Welty, for

Robust controller design for robotic manipulators with saturation

Creator:: Liang, Zuyang
Abstract:: The development of modern industries calls for the robotic manipulators with high speed and accurate tracking performance. Many authors have paid attention to robust control of robotic manipulators; however, only few authors have also considered the control problem of manipulators with power limitation. In this dissertation, the robotic manipulator is...
Resource Type:: Dissertation

A computational model for resonantly coupled alpha free-piston Stirling Coolers

Creator:: Al-Hazmy, Majed Mualla H.
Abstract:: A computational model for a resonantly coupled alpha free-piston Stirling cooler is presented. The cooler consists of two isothermal working spaces for compression and expansion connected by a regenerator consisting of a stack of narrow parallel channels. The regenerator is assumed to have a linear temperature distribution along its axial...
Resource Type:: Dissertation
Full Text:: Dean of Graduat chool I understand that my thesis will become part of the permanent collection of

Rebound predictions for elastic collisions

Creator:: Liu, Pao-pao
Abstract:: In this paper, a numerical method is used to predict the response of an elastic body during a collision in which both normal and tangential impulses are important. Results are compared with those from simplified prediction procedures, which stem from the assumptions that the energy-returning capacity of the normal deformation...
Resource Type:: Dissertation
Full Text:: . Coulomb's law implies that if and only if 14?31 I cd11:1 < 11, (2.40) there will be no sliding; thus, if

Mechanical properties of Nb-Ti composite superconducting wires

Creator:: Liu, He
Abstract:: Mechanical properties of Nb-Ti composite superconducting wires were tested at room temperature. The results were analysed using simple composite theory, the rule of mixtures. The objective is to predict the mechanical properties of Nb-Ti superconducting composite wires as a function of volume ratio and geometry of the components, the composite...
Resource Type:: Masters Thesis
Full Text:: Wires. /i/ Ai /, Abstract approved: Redacted for Privacy William H. Warnes Mechanical properties of Nb

Investigation of instantaneous hydrodynamics and heat transfer to a horizontal tube immersed in a high-temperature gas-solid fluidized bed of large particles

Creator:: Burr, Marlene Mainland
Resource Type:: Dissertation
Full Text:: phase heat transfer coefficients. These expressions are 0.133 Num = 8.95 (1 60))2/3 + 0.16 Ar " Re °I

Three-dimensional, nonlinear viscoelastic analysis of laminated composites : a finite element approach

Creator:: Wang, Min
Abstract:: Polymeric composites exhibit time-dependent behavior, which raises a concern about their long term durability and leads to a viscoelastic study of these materials. Linear viscoelastic analysis has been found to be inadequate because many polymers exhibit nonlinear viscoelastic behavior. Classical laminate theory is commonly used in the study of laminated...
Resource Type:: Dissertation
Full Text:: Redacted for Privacy ACKNOWLEDGEMENTS First and foremost, I am especially thankful to my major

An object oriented representation for mechanical design based on constraints

Creator:: McGinnis, Brian D.
Abstract:: A representation for the process of mechanical design, along with its computer implementation is presented and discussed. The representation consists of three fundamental concepts: design objects, constraints, and decisions. The design objects are the structures with which the physical artifacts of the design are described. A design object consists of...
Resource Type:: Masters Thesis
Full Text:: researcher for Brian D. McGinnis ACKNOWLEDGEMENT I wish to thank Dr. David Ullman and Dr. Tom Diettrich

Analytical method for the prediction of reliability and maintainability based life-cycle labor costs

Creator:: Fitzpatrick, Mark W.
Abstract:: An analytical method for predicting life-cycle maintainability labor costs is developed. The purpose of the analytical method is to allow the evaluation of products, based on life-cycle labor cost, early in the design process. The Boeing 737-300/400/500 Bleed Air Control System is used as a test model, and the results...
Resource Type:: Masters Thesis
Full Text:: to School I understand that my thesis will become part of the permanent collection of Oregon State

Six-axis force sensors : a comparative study

Creator:: Valdes-Salazar, Juan C.
Abstract:: A comparative study of three six-axis force sensors selected after an extensive literature survey is presented. A sensor to measure ground contact force at each foot of a walking machine is recommended. Principles of force sensing are reviewed and characteristics of sensing elements are discussed. Results of simulation of three...
Resource Type:: Masters Thesis
Full Text:: compliance matrix given by = C d i a g f a , f m a x , f m a , M , M ,M 1 r (6) If the maximum PFS

Temperature measurement, electrical characteristics, and lorentz mixing of alkali seeded flames

Creator:: Pattee, Heidi Ann
Abstract:: When trace quantities of an alkali element are added to a flame, its optical and electrical properties change significantly. Addition of alkali seed to both premixed and diffusion flames has been used in the development of two new techniques, one for flame temperature measurement and the other for enhanced mixing....
Resource Type:: Dissertation
Full Text:: adviser, but also as a co-worker, supporter, and friend. No adviser/student relationship is entirely

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:: Privacy Redacted for Privacy ACKNOWLEDGEMENTS I would like to express my sincere appreciation to my

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