Digital Commons Network^™

Biotoxicity Of Highway Runoff Metals To Gambusia, John M. Bateman

Retrospective Theses and Dissertations

A research study was conducted to examine the relationship between speciation of heavy metals (Zn, Cd, Pb, Cu) and their biotoxicity. Therefore, static bioassay experiments were designed to determine LC-50 values for those metals on mosquitofish, Gambusia affinis. The standard bioassay scheme consisted of twelve 16-liter all-glass aquaria that provided duplicates of five different metal concentrations and a control for each run. Deionized tap water and filtered retention/detention water from Maitland Pond were used for bioassays. The effects of various physiochemical parameters such as pH, alkalinity, hardness and organic complexation on metal toxicity were determined. Also, synergistic and antagonistic effects …

Design Of An Evaluation System For The Electro-Oculometer, Chrysanthos A. Panayiotou

Retrospective Theses and Dissertations

The purpose of this paper is to develop a system for evaluation of a skin-voltage Oculometer. A test set-up is designed that allows any person to attach the input of the Oculometer (electrodes) on his/her-self and obtain the transfer characteristics of the system. Two set-ups are designed. In the first one, the static transfer characteristics are obtained with the aid of a wall chart. In the second one, the dynamic transfer characteristics are obtained with the aid of a computer moving a bright spot on a large screen television set. An investigation of the possible sources of error is also …

Doctor Of Arts In Training And Learning Technology, Nova Southeastern University

College of Engineering and Computing Course Catalogs

No abstract provided.

Center For Science And Engineering Schedule Of Classes January-April 1984, Nova University

College of Engineering and Computing Course Catalogs

No abstract provided.

Doctor Of Arts In Information Science 1984-95 Bulletin, Nova Southeastern University

College of Engineering and Computing Course Catalogs

No abstract provided.

A Model For Scattering In Dense Clouds, Richard A. Leblanc

Retrospective Theses and Dissertations

Lights is almost always detected by its interaction with matter. One of these interaction phenomena is the scattering of light by small particles. A model is developed that estimates the amount of energy that is scattered towards a detector from a beam given the locations of the source, detector and particle. This collection of particles is allowed to be very dense so that a photon scattered from the beam can be scattered several times before leaving the scattering medium. By considering the single-scatter component and multiple-scatter component separately, the model retains the characteristics of both types.

Graphic Display Of Geographic Spatial Data, Jill G. Ashby

Retrospective Theses and Dissertations

This project developed computer graphics to display spatial and statistical data in a functional, appropriate and articulate manner. The spatial data creates mapping of Orange County focusing on traffic zones. The graphs display statistical data projecting from spatial areas presented in a simple form. The graphs produced by the system are geared towards an audience involved with transportation and planning decisions for Orange County. The graphics employ population, income, number of dwelling units, trip generation and trip production data based upon the 1980 census. The population, income, and number of dwelling unites statistics include predictions for 1985 through 2005 in …

A Study On Fragmentation And Ground Vibration With Air Space In The Blasthole, Everett Ellsworth Bleakney Iii

Masters Theses

"The degree of fragmentation and the level of ground vibration from a bench blast employing standard full-column completely-coupled explosive charges are commonly controlled by varying one or more of the many dimensional variables of blast design. Blasting techniques such as decoupling and air-gapping, utilizing air space in the blasthole, have also been reported as having the potential to control rock fragmentation and ground vibration.

This investigation, using reduced-scale in situ bench blasts, examined the degree of fragmentation and the level of ground vibrations produced from the standard full-column completely-coupled, air-gapped, and decoupled methods of blasting to:

1. Compare the effectiveness …

Sol Probe And Method Of Obtaining Moisture,Temperature And Root Distribution Of A Soil Profile, Marvin Twersky, William E. Splinter, Bruce C. Sandhorst

Department of Agricultural and Biological Systems Engineering: Faculty Publications

To provide a profile of simultaneous moisture, temperature and root density characteristics at different depths of soil, a soil probe is inserted in the soil with a viewing and camera section extending above the soil. Similarly, the probe provides a profile of simultaneous moisture, temperature and presence of molds, insects or other foreign matter in grain or similar media including liquid as well as solid granulated material. The portion of the probe that is in the soil or other media includes a source of light or light conveyance and windows which transmit an image of the soil at various depths …

Arkansas Groundwater Management Via Target Level, Richard C. Peralta, Ann W. Peralta

Civil and Environmental Engineering Faculty Publications

AN approach to groundwater management by maintaining "target" groundwater elevations is presented. A finite difference form of the Boussinesq equation is proposed as a means of determining the groundwater withdrawals that will maintain those levels in the long term. This spatially distributed pumping can represent a sustained yielding pumping strategy. A sample pumping strategy is presented for the Arkansas Grand Prairie. Such a strategy is applicable under a variety of legal systems. It represents an especially attractive alternative for riparian rights states (like Arkansas) where effective groundwater management without radical changes in the basic water rights system is desired.

The Application And Effectiveness Of Slow Sand Filtration In The United States, L. A. Slezak, Ronald C. Sims

Biological Engineering Faculty Publications

A survey of 27 slow sand filtration plants in the United States indicated that most of these plants are currently serving communities of fewer than 10 000 persons, are more than 50 years old, and are effective and inexpensive to operate. A slow sand filtration research facility in Logan, Utah, was compared with the operating plants to determine if locally available, unsieved sand achieved similar results. The 75‐m³/d research facility performed well in removing turbidity, coliform bacteria, and particles of a size representative of Giardia cysts.

Review Of In-Place Treatment Techniques For Contaminated Surface Soils - Volume 2: Background Information For In Situ Treatment, Ronald C. Sims, Darwin L. Sorensen, Judith Sims, Joan E. Mclean, Ramzi Mahmood, R. Ryan Dupont

Reports

This second volume of a two volume manual on in-place treatment of hazardous waste contaminated soil supports the treatment methodology described in Volume 1 (EPA- ). The information presented on monitoring to determine treatment effectiveness, characterization and evaluation of the behavior and fate of hazardous constituents in soil/waste systems, and properties (including adsorption, degradation, and volatilization parameters) for various compounds is intended to help the manual user in making more complex decisions and in selecting analyses concerning site, soil, and waste interactions. This report was submitted in partial fulfillment of Contract No. 68-03-3113 by Utah State University under the sponsorship …

Abstracts Of Specialty Conference Papers; Delineation Of Landslide, Flash Flood And Debris Flow Hazards In Utah, B. Kaliser, M. K. Mccarter, R. Pack, J. Newman

Reports

No abstract provided.

Direct Filtration Versus Conventional Water Treatment In The Intermountain Region, Susan K. Burns, V. Dean Adams, Steel B. Maloney

Reports

The direct filtration water treatment scheme does not include sedimentation and in some cases flocculation. Compared to conventional treatment, direct filtration has lowered capital costs, reduced space requirements, decreased sludge quantities, and reduced coagulant dosages. One objective of this research was the statistical comparison of the direct filtration, Utah Valley Water Purification Plant (Orem, Utah) and the conventional Little Cottonwood Water Treatment Plant (Salt Lake City, Utah). These treatment plants are the two most compatible treatment plants having the highest correlation of source water in the local area. The Little Cottonwood plant receives approximately 65 percent of its sources water …

Review And Evaluation Of The Gibson Dome High Level Nuclear Waste Repository Environmental Assessment: Geohydrologic Issues, Christopher J. Duffy, Brad Hall

Reports

Introduction: Background/Authorization: This report is meant to provide a technical review and evaluation of Department of Energy documents concerning groundwater, radionuclide travel time and monitoring issues relative to siting a high level nuclear waste repository in the Gibson Dome area in Southern Utah. in so doing we have, during a relatively short period of time, examined in detail the Department of Energy Guidelines concerning high level nuclear waste disposal (1983) including revisions (1984), and each draft of the Environmental Assessments for Davis and Lavender Canyon, up to and including the fifth draft (dated July 27, 1984). In addition, a large …

Optimizing Conjunctive Use Under Sustained Yield Constraints, Richard C. Peralta, P. Killian, W. D. Dixon

Civil and Environmental Engineering Faculty Publications

Distributed parameter groundwater management model utilizing quadratic programming to develop a steady-state potentiometric surface is presented. Minimization of cost of meeting water needs from groundwater and alternative water sources is achieved. Drawdowns, groundwater withdrawal and recharge are all constrained. Applicable for assuring agregiorral sustained yield of groundwater.

The Role Of Boron In So32 And So43 Steels, Sunil S. Moghe

Masters Theses

"In this project study was conducted with the goal of understanding the role of boron involved in structure-toughness property relationship for SO32 and SO43 steels. For a standard heat-treatment of austenitizing (1 hr.) at 1700°F, water quenching and 1 hr. tempering at 1150°F SO32 steel (with 37 ppm B) lacked in toughness, while SO43 steel (with 2 ppm B) showed good toughness. In both steels all the boron was present in the form of "soluble boron" i.e., Fe₂₃ (B,C)₆ borocarbide. Experiments were carried out to study the effect of various heat treatment parameters on the precipitation behavior of …

The Modeling And Control Of Freeze Dryers, Martin James Millman

Doctoral Dissertations

"Two models of the freeze drying process were constructed and used to study various operational policies in order to determine the policy that would provide the shortest drying times.

The sublimation model which accounts only for the removal of frozen water, is found to predict shorter times for the free water removal phase than the sorption-sublimation model which properly accounts for the removal of frozen and bound water.

This study shows that the policy which produces the shortest free water removal phase, also produces the shortest overall drying time. This policy, predicted by both models, holds the chamber pressure at …

A Study Of The Permeability Of Clays Subjected To Organic And Inorganic Permeants, Janardanan O. Uppot

Doctoral Dissertations

"Two types of clays, a magnesium montrnorillonite and a kaolinite, were subjected to precise permeability tests in specially designed triaxial permeameters, using organic and inorgani c permeants, to study the changes in permeability due to the reaction between clays and permeants. The organic permeants were an acid (acetic acid), a base (aniline), a neutral polar fluid (methanol), a neutral nonpolar fluid (xylene), as well as EDTA and its sodium salt. The inorganic permeants were aqueous solutions of aluminum, magnesium, sodium, calcium, barium and strontium.

The clay samples were prepared by consolidating from slurry; they were subjected to back-pressure saturation and …

Unsteady-State Cylindrical, Spherical And Linear Flow In Porous Media, Allan Jeffrey Anthony Joseph

Doctoral Dissertations

"The general problem of unsteady flow phenomena in porous media as considered in this investigation. Emphasis was placed upon the short-term flow characteristics within cylindrical, spherical and linear reservoir geometries, and practical analysis methods were developed for each problem. Additionally, nonlinear unsteady flow behavior in infinite reservoirs was considered. Each solution obtained could optionally be implemented by hand or computer, and several FORTRAN subprograms were also presented.

At present, the only way to analyze pressure transient data prior to the development of the "semi log straight line" is by type curve matching techniques. However, this study indicated that a reliable …

Irish H & V News

Building Services Engineering

No abstract provided.

Underwater Acoustic Wavefront Phase Fluctuations, George L. Vojtech Jr.

OES Theses and Dissertations

In conventional underwater acoustics sound propagation is generally modeled and applied as a coherent or incoherent process. This paper addresses a relatively new theory, that of a range driven increasingly incoherent ray propagation through a real ocean environment, Possible mechanisms are discussed and experimental data presented to reinforce the theory.

Pseudo-Brewster And Second-Brewster Angles Of An Absorbing Substrate Coated By A Transparent Thin Film, R. M.A. Azzam, T F. Thonn

Electrical Engineering Faculty Publications

The pseudo-Brewster angle of minimum reflectance for the p polarization, the corresponding angle for thes polarization, and the second-Brewster angle of minimum ratio of the p and s reflectances are all determined as functions of the thickness of a transparent film coating an absorbing substrate by numerical solution of the exact equations that govern such angles of the form Re(Z′/Z) = 0, where Z = R_p, R_s, or ρ represent the complex amplitude-reflection coefficients for the p and s polarizations and their ratio (ρ =R_p/R_s), …

H & V News

Building Services Engineering

No abstract provided.

Two-Dimensional Computer Modeling Of Joints And Fractures In Continua, Royd R. Nelson

Theses and Dissertations

This thesis presents a numerical formulation which incorporates the effects of joints, cracks, and fractures into a mathematical mode used to in an existing finite element code. Two separate crack definitions were incorporated, one involving a discrete crack model, and the other a continuum approach defining a new material with regularly spaced joints. Several examples are also presented demonstrating the use of this capability.

H & V News

Building Services Engineering

No abstract provided.

Design Of A Photoreactor For The Oxidation Of Toxic Pollutants In Water By Ozone And Ultraviolet Radiation, Shahab Rashid Khan

Theses

A photoreactor has been designed to oxidize refractory chemicals found in water using ozone and ultraviolet radiation. The feasibility of the ozone/UV process has been examined by conducting experiments with three model compounds, namely, (1) o-chlorophenol (2) m-chlorophenol and (3) p-chloro phenol. For o-chlorophenol and p-chloro-phenol, reactions were very fast with ozone/UV oxidation and somewhat slower with m-chlorophenol. It is concluded that UV irradiation increases the decomposition of ozone and the resulting unstable intermediates are much more reactive than ozone. Ultraviolet light also helps in decomposing the substrate molecules. The effect of UV upon decomposition of ozone is more pronounced …

Fall 1983, 90.9 Wmpg Fm

WMPG Program Guides

WMPG Program Guide, Fall 1983.

Acuta Enews October 1983, Vol. 12, No. 10

ACUTA Newsletters

In This Issue

PARTY LINE

PRESIDENT'S MESSAGE

FREE PUBLICATION

ACCESS CHARGES CAUSE ANGER, DISMAY

THE BREAKUP OF AT&T IS A MONUMENTAL BLUNDER

THE SEVEN REGIONAL BELL OPERATING COMPANIES, JANUARY 1, 1984

FUTURE OF PHONE SERVICE CONCERNS BEREUTER

TAKING CONTROL OF AUTOMATION

BITS & PIECES

COMPUTER, CORRESPONDENCE COURSE PAIR UP IN 'ELECTRONIC UNIVERSITY'

Center For Science And Engineering Schedule Of Classes Fall 1983, Nova Southeastern University

College of Engineering and Computing Course Catalogs

No abstract provided.