Engineering Commons^™

Optimal Configuration Of Regional Water Supply Systems (Wasopt2) , Mohamed L. Al-Eryani, Trevor C. Hughes

Reports

Any water supply system can be conceptualized as consisting of three componenets--source development facilities (including treatment), transmission facilities, and a distribution network. The scope of this report is limited to the first two--the source related facilities upstream from the distribution network. In the mathematical modeling of regional rural systems, the number of variables, and hence the size of the model, increases rapidly as the number of system componenets and their alternative designs increase. Regardless of the method of solution, manual preparation of large models is cumbersome and is vulnerable to human error both in the computations of the matrix coefficients …

Identification And Modeling The Impact Of Marine Shale Bedrock On Groundwater And Stream Salinity: Upper Colorado River Basin, Christopher J. Duffy, Jerome J. Jurinak, Sanjay Sangani, Ali Azimi

Reports

Recent studies have shown that groundwater is a major contributor to stream salinity in the Upper Colorado River Basin. The primary salt sources are the marine shales and shale residuum that underlie the soils of much of the basin. A field site in the Price River Basin, a tributary to the Green and Colorado Rivers, was selected to study the physical and chemical factors that control the interactions between groundwater and these shales. Preliminary data were available at the site as a result of a Bureau of Reclamation study conducted by CH2M Hill. On the basis of the CH2M Hill …

Water Education ... With Emphasis On Deer Creek Reservoir - Provo River Drainage Area (Grades 5-8), Donald R. Daugs, C. Earl Israelsen, Mardell C. Parrish

Reports

Introduction: The major goals of this publication are to: * promote an awareness of the importance of water resources associated with the target watershed; * provide teachers with learning resources which are easily used in the classroom or in the field; and * provide teachers with teaching materials which help satisfy State Core Standards.

Water Education Grades K-6, Donald R. Daugs, C. Earl Israelsen

Reports

Preface: Water Activites for Elementary Children is based upon the assumption that children learn best by doing. In education, and especilly in science, talking is not necessarily teaching. The most desireable types of learning involve direct, first hand experience, not just a teacher's interpretation of these experiences. This set of learning experiences has been designed for teachers, teachers-in-training, and children, Each concept includes background information for the teacher and learning activities for the children. Lessons are designed so taht a teacher can successfully teach a unit or lession with a minimum of knowledge, preparation, and equipmnet. Most of the suggested …

Economic Feasibility Of On‑Farm Reservoirs For Irrigation Water, Robert N. Shulstad, Jayson K. Harper, Richard C. Peralta

Civil and Environmental Engineering Faculty Publications

No abstract provided.

A Study Of Shadow Contrast For A Grating, Steve Eugene Watkins

Masters Theses

"A theoretical and experimental investigation of the causes of the reduction of the contrast in the shadow of a grating has been made. The variation of the shadow contrast is shown to be different for the two causes--diffraction and divergence. The conditions which determine the dominant effect are presented. Also, the contrast pattern due to diffraction is shown to have a squared scaling law while the divergence pattern is shown to scale linearly. This understanding of the shadow contrast increases the versatility and usefulness of the shadow moire technique, an optical method for determining the topography of surfaces"--Abstract, page ii.

Solution To The Piecewise Linear Continuous Random Initial Value Problem For Burgers' Equation, Yin Chin Shih, X. B. Reed, Jr.

Chemical and Biochemical Engineering Faculty Research & Creative Works

A closed form solution to Burgers' equation on an infinite domain has been obtained for "random sawtooth" continuous initial conditions defined on a finite domain. The "turbulent" solution is then used to compute statistical measures such as skewness and flatness factors, energy decay rates, and the temporal evolution of velocity autocorrelations and energy spectra. © 1985 American Institute of Physics.

An Analysis Of The Lyophilization Process Using A Sorption‐Sublimation Model And Various Operational Policies, M. J. Millman, Athanasios I. Liapis, J. M. Marchello

Chemical and Biochemical Engineering Faculty Research & Creative Works

The freeze‐drying process is studied under various operational policies through the use of a sorption‐sublimation model. The operational policy that provides the shortest drying times keeps the pressure at its lowest value. The upper and lower heating plates are independently controlled so that the material constraints are encountered and held throughout the free water removal phase. Under certain conditions, and for the case of samples of small thickness, the sorbed water profiles may have segments whose bound water concentrations are higher than those at the start of the free water removal phase. It is shown that the criterion used in …

A Management Training Model For Engineers In Saudi Arabia, Majid Al-Kassabi

Doctoral Dissertations

“Great economic growth has occurred in Saudi Arabia in the last decade creating overwhelming demands for professionally trained people. The emerging Saudi professionals are mostly engineers who have been put in managerial positions without the benefit of managerial training.

Objectives of this research were 1) To identify the skills needed by engineers to become managers; 2) To identify problems and constraints inherent in management training programs; 3) To identify the impact of a model training program on the individual; and 4) The impact of a model training program on the firm.

A training program was implemented using an experimental group …

Long-Term System Performance Of A Direct Expansion Solar Assisted Heat Pump, Majid Abazeri

Mechanical & Aerospace Engineering Theses & Dissertations

The long-term thermal performance of a direct expansion solar assisted heat pump is determined from the transient system simulation of the system. The system employs a bare collector which also acts as the heat pump evaporator. Of particular interest in this study is the

configuration in which the compressor and the collector area are properly matched from the long-term thermal performance viewpoint. This matching is achieved through continuous as well as two step compressor capacity modulation. In addition to examining the effects of compressor capacity modulation, the effects of various system parameters such as collector area„ storage volume, load temperature, …

Computer Aided Simulation Of A Heating, Ventilating, And Air Conditioning System In A Building, Sunil Shrikrishna Kulkarni

Mechanical & Aerospace Engineering Theses & Dissertations

The Godwin Life Science Building on the Old Dominion University campus presents an interesting problem in terms of energy conservation. The building is the maximum energy resource consumer on the campus, having a criterion value of 234 KBtu/sq.ft-year (2657 MJoules/sq. rneter-year). A Simplified Energy Analysis Method (ASEAM) loads and systems computer program was used to simulate the building and its heating, ventilating, and air conditioning (HVAC) plant in order to understand the building's high annual energy resource consumption rate, and to devise ways to overcome it. The main goal was to assess and propose energy conservation improvements to the existing …

The Direct Summation Of Totally Self-Checking Checkers, Stefean Andrew Fedyschyn

Electrical & Computer Engineering Theses & Dissertations

A new technique for reducing the complexity of designing Totally Self-Checking (TSC) checkers for m-out-of-n codes is presented. The method is based on the partitioning of the input variables into r classes, then partitioning the code groups generated into Z output partitions. Comparison with earlier results reveals improvements in design simplicity and logic and testing complexity.

This thesis also presents a new method of TSC checker design where a j-level m₁/n₁ code and a k-level m₂/n₂ code TSC checker are directly summed to form a max [j,k]-level (m₁ + m₂) / …

A Case Study Of The Management Of New Packaging Technologies, Richard Kirk Maguire

Masters Theses

"There has been a growing interest by industry in the functions of packaging management as packaging is being recognized as a greater factor in the overall success of a company.

This is a case study on the packaging management structure of one company and how the introduction of new packaging technology is handled by that company. The case study follows the history of the packaging department of the company and examines the current structure of the department. The study goes on to analyze the department's methods for handling old and new technologies and the reasons for doing so. A closer …

Growth Of Tungsten Selenide Films Through Pyrolytic Conversion And Anodic Electrooxidation Of Ammonium Selenotungstate ((Nh4)2wse4), R. D. Engelken, T. (Thomas) P. Van Doren, Jack L. Boone, A. K. Berry, A. Shahnazary

Electrical and Computer Engineering Faculty Research & Creative Works

WxSey thin films have been prepared by the spray pyrolysis and anodic electrodeposition of solutions of ammonium selenotungstate, (NH4)2WSe4, with y/x usually between two and three for the sprayed films and y x>>1 for the electrodeposited films. The sprayed films indicated regions of crystalline WSe2 and have optical absorbance spectra consistent with a mixture of WSe2, WSe3, and selenium. The electrodeposited films are totally amorphous, highly photoconductive, and have optical absorbance spectra typical of amorphous or vitreous selenium. The sprayed films transform into WO3 at temperatures greater than 350°C in the presence of oxygen wile the electrode-posited films tend …

Impacts Of Robotics And Flexible Manufacturing Technologies On Manufacturing Costs And Employment, Steven M. Miller

Research Collection School Of Computing and Information Systems

The issues analyzed in this paper are the extent to which unit costs and production labor requirements might be reduced in manufacturing industries if there is more widespread use of industrial robots and flexible systems. The analysis is reported in detail in Miller (1983). These issues are analyzed from two different perspectives. The technological focus of the first perspective is narrowly confined to the use of robotic manipulators. It is assumed that robotic manipulators will be “retrofitted” into existing production facilities without making major changes in the organization of production within the factory, other than modifying individual work stations so …

Plasma Polymerization Investigated By The Substrate Temperature Dependence., H. Yasuda, Cheng Wang

Chemistry Faculty Research & Creative Works

In the reported experiments, plasma polymerization of tetrafluoroethylene (TFE), perfluoro-2-butyl-tetrahydrofuran (PFBTHF), ethylene, and styrene were investigated in various combinations of monomer flow rates and discharge wattages for the substrate temperature range of minus 50 to 80 degree C. The polymer deposition rates can be generally expressed by k//o equals Ae** minus **b**t, where k//o is the specific deposition rate given by k//o equals (deposition rate)/(mass flow rate of monomer), A is the preexponential factor representing the extrapolated value of k//o at zero absolute temperature, and b is the temperature-dependence coefficient. It was found that the value of b is not …

Feasibility Study Of Fabricating Composite Ceramic Chamber Liners For Small Caliber Automatic Weapons, P. D. Ownby, D. V. Stewart

Materials Science and Engineering Faculty Research & Creative Works

No abstract provided.

Length-Thermal Stress Relations For Composite Bridges, Jack H. Emanuel, Charles M. Taylor

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Computer-assisted analysis was used to study the relation among uniform, linear, and nonlinear stress components thermally induced in a composite bridge section for hypothetical parameters of varying span lengths, number of spans, and support conditions, as well as for actual bridges. The results were verified by conventional methods of analysis. The following was concluded for prismatic (constant) sections: (1) For constant proportionality of span lengths, each of the three thermal stress components is independent of span length; (2) variation of the proportionality of span lengths affects only the linear stress component; (3) support reactions and deflections caused by thermal loading …

Relative Durability Of Shale -- A Suggested Rating System, David Newton Richardson

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

The inability to predict the degradation tendencies of shale has resulted in numerous failures of projects where shale was used as a construction material. Because shale does not fit neatly into either a soil category or a rock category, the tests that are commonly used to classify soil or rock are in many instances not totally suitable for classifying shale as to its long-term behavior properties. Thus, special classification tests of shale types has become necessary. The durability or shale relates to how well it can withstand its changing environment and still retain its initial properties. Strength, expansion characteristics, and …

Unsteady-State Spherical Flow With Storage And Skin., Jeffrey A. Joseph, Leonard Koederitz

Geosciences and Geological and Petroleum Engineering Faculty Research & Creative Works

This paper presents short-time interpretation methods for radial-spherical (or radial-hemispherical) flow in homogeneous and isotropic reservoirs inclusive of wellbore storage, wellbore phase redistribution, and damage skin effects. New dimensionless groups are introduced to facilitate the classic transformation from radial flow in the sphere to linear flow in the rod. Analytical expressions, type curves (in log-log and semi log format), and tabulated solutions are presented, both in terms of pressure and rate, for all flow problems considered. A new empirical equation to estimate the duration of wellbore and near-wellbore effects under spherical flow is also proposed.

Two New Parallel Processors For Real Time Classification Of 3-D Moving Objects And Quad Tree Generation, Farjam Majd

Dissertations and Theses

Two related image processing problems are addressed in this thesis. First, the problem of identification of 3-D objects in real time is explored. An algorithm to solve this problem and a hardware system for parallel implementation of this algorithm are proposed. The classification scheme is based on the "Invariant Numerical Shape Modeling" (INSM) algorithm originally developed for 2-D pattern recognition such as alphanumeric characters. This algorithm is then extended to 3-D and is used for general 3-D object identification. The hardware system is an SIMD parallel processor, designed in bit slice fashion for expandability. It consists of a library of …

Microcomputer Mrp In Three Months: Photon Kinetics, Wayne W. Wakeland

Complex Systems Faculty Publications and Presentations

Information about the company Photon Kinetics, a small, privately-held manufacturer of fiber optics test equipment, located in Beaverton, Oregon.

Evaluation Of A Near-Surface Low-Level Radioactive Waste Disposal Facility For The State Of Missouri, Christine Lang Nelson

Masters Theses

"A low-level radioactive waste disposal facility for the state of Missouri Is designed. The proposed facility Is to be placed in a mined opening within a Precambrian granite outcrop in southeastern Missouri.

A safety assessment of the proposed facility was performed. The method used was fault tree analysis.

The threat of seismic activity within the region ls seen to be the main determent to the proposed design. Groundwater modelling was not possible due to a lack of data.

The facility design Includes a provision for the retrieval of the low-level waste once the waste has decayed to acceptable levels"-- Abstract, …

Automated Evaluation Of Reservoir Parameters Applying Pressure Transient Theory, Steven Robert Homoky

Masters Theses

"This study presents an investigation to automatically evaluate reservoir parameters using pressure transient theory. Methods will be introduced to numerically fit the well test data in the real (time) domain (specifically the pressure change as a function of test time). The numerical fit and known fluid, rock and well properties will be used to evaluate the dimensionless storage coefficient. The theoretical dimensionless pressure (being a function of skin factor, permeability, and dimensionless storage coefficient) is obtained by Laplace Inversion. The ability to evaluate the dimensionless storage coefficient thus reduces the parameters of the pressure equation by one. Varying the skin …

Development Of Apparatus For Constant-Hydraulic-Gradient And Constant-Rate-Of-Strain Consolidation Tests, Jack F. Geerlings

Masters Theses

"A back pressure type consolidometer manufactured by Anteus Laboratory Equipment Company is modified to perform either constant hydraulic gradient or constant rate of strain consolidation tests. The modification of the consolidometer and its instrumentation are described. Computer software is developed for the purpose of apparatus control and for test data acquisition and analysis.

Constant hydraulic gradient and constant rate of strain consolidation tests are performed on samples consolidated from a slurry in the laboratory. Results of these tests are compared with incremental consolidation tests performed with an oedometer.

The modified apparatus was found to be suitable for use in both …

Oxygen Absorption And Diffusion In Tissue, Bo Henrik Arve

Masters Theses

"A mathematical model which describes the diffusion of oxygen in absorbing tissue is presented. The model accounts for the presence of a moving boundary which marks the deepest penetration of oxygen into the absorbing medium and predicts the steady state and unsteady state distribution of oxygen through the absorbing tissue.

Results are shown for zeroth, half, first, one and a half, and second order rates of absorption as well as when the rate of absorption is described by the Michaelis - Menten equation.

The model predictions show that the total time for the moving boundary to recede to the surface …

A Theoretical Study Of Antecedent Soil Moisture As It Relates To The Rainfall-Runoff Relationship, Karen Sue Angert

Masters Theses

"This paper addresses the feasibility of using antecedent soil moisture as a tool for predicting the extractions from rainfall due to the infiltration process by solving the one-dimensional equation for saturated- unsaturated flow through porous media. Soil moisture characteristics in the form of empirical equations were used to incorporate the hysteretic behavior of the soil-water relationships into the model. Two sets of parameters were developed to be representative of a silty sand and a silty fine sand.

Extractions as infiltration from a given storm hyetograph and the total volume of direct runoff were computed for different initial moisture states. When …

Complex Reactions In Porous Media, Dar-Sen Horng

Masters Theses

"The dusty-gas model is used to describe the molar fluxes of complex irreversible reactions with moles changes in isothermal porous catalysts.

The model presented in this work can be used for any number of independent reactions occurring in porous media as long as the number of independent reactions is equal to or less than the total number of species.

Systems of two parallel reactions involving a ternary mixture is used in this work. Five sets of reaction parameters are used for each reaction system and the overall selectivity and effectiveness factors are calculated for different geometric constants.

Results show that …

Electric And Magnetic Field Induction On Parallel Transmission Lines, Robert Joseph Schnell

Masters Theses

"The theory behind electric and magnetic field induction is developed. The theory is then applied to the calculations of induced voltages and currents on a de-energized three phase transmission line paralleling an energized three phase transmission line. The effect of shield wires on the induction phenomena is explained. Interactive computer programs for both electric and magnetic field induction are presented and instructions given for their use. Both programs are stored on disks and are for use on an IBM (or compatible) personal computer. Example problems are posed and solved"--Abstract, page ii.

An Analysis Of Mill Sound Levels To Aid In The Control And Understanding Of The Grinding Process, Scott Douglas Morrison

Doctoral Dissertations

“An experimental study has been made to evaluate the relationships between grinding parameters and the directional sound levels emitted from the collision of the grinding media with the mill wall for a laboratory batch ball mill.

Discrete frequency and single frequency band sound pressure level measurements were performed to investigate the changes in sound levels with grind time. It was demonstrated that the reduction in sound levels with grind time observed for a narrow sized feed can be used to indicate optimum breakage rates, overall time-based particle size distribution, and ore character.

The relationships established with the discrete frequency and …