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Acoustic-Wave Nonlinearity In Stimulated Brillouin Scattering, Evangelos A. Coutsias, Bruce S. Masson

Branch Mathematics and Statistics Faculty and Staff Publications

Stimulated Brillouin scattering is investigated here under conditions characterized by high optical pump intensity. Calculations are carried out at 1.3 and 3.8 /jm with pump intensities equal to approximately three times the threshold. Such strong optical forcing leads to significant self-distortion of the density profile in the material wave serving as the optical grating. The method of multiple scales is used to find a uniform asymptotic expansion in the coupling. At the first perturbation level the resonant portion of the problem yields abridged equations for the incident and the scattered waves with frequencies CWaLn d ws = L - 0 …

Bulletin 4279 - Streamlining - An Environmentally Sustainable Drainage Network For The Swan Coastal Plain (Peel-Harvey Catchment), Garry Heady, Neil Guise

Bulletins 4000 -

Community Catchment Centre Pinjarra

A network of over 1400 kilometres of drains and modified natural waterways constructed by the Public Works Department criss-crosses the Peel-Harvey catchment. There are also over 3300 kilometres of minor drains and natural waterways in this same region.

The expansion of agriculture relied on this extensive drainage network, which was designed to ensure rapid drainage of the region. Unfortunately there was little regard to future environmental consequences.

Along with drainage water, these same drains now carry high loads of silt and nutrients. Many of the drains are also degraded and require expensive maintenance annually.

Problem Solving Environments For Partial Differential Equation Based Applications (Ph.D. Thesis), Sanjiva Weerawarana

Department of Computer Science Technical Reports

No abstract provided.

Total Organic Carbon In A Glacial Aquifer: Measurement And Effects Upon Transport Of Organic Compounds, Jiang Wu

Masters Theses

Organic contaminant transport processes in subsurface systems have been paid increasing attention recently. Sorption of organic compounds on the aquifer solid matrix (retardation) is one of the most important processes influencing contaminant transport. The extent of sorption has been estimated by determination of organic carbon in aquifer materials and assumptions concerning sorption constants.

This paper focuses upon the sensitivity of organic contaminant transport to the total organic carbon (TOC) content in a natural aquifer. This study was composed of two phases. The first phase was methodology development and laboratory analysis of organic carbon contents in soil samples. Acidification and furnace …

Use Of Infrared Spectrometry To Determine The Effect Of Temperature On The Description Rates Of Trichloroethylene From Plastic Clay 98b, Abdellatif Fares

Theses and Dissertations

This thesis investigated the influence of temperature on the desorption rated of trichloroethylene (TCE) from plastic clay. It was expected that an increase in temperature will cause an increase in both the desorption rates of TCE and in the desorbed quantity. Previous studies on other chemicals indicated a faster decrease in the remaining sorbed concentration with an increase in temperature. This research made use of the infrared optical absorption technique. IR spectroscopy was used to measure the concentration of the vapor TCE that desorbed from the soil. The soil was exposed to liquid TCE for 2 days then placed inside …

Modeling Of Ground Water Aquifer Remediation By Pulsed Pumping When Contaminant Transport Is Affected By Physical, Non-Equilibrium Sorption And Desorption, Jeffrey L. Caspers

Theses and Dissertations

This research postulates and demonstrates a modification incorporating rate-limited sorption effects in the USGS SUTRA code for cleanup of a hypothetical sandy aquifer by pump-and-treat remediation methods. Contaminant transport is assumed to be affected by advection, dispersion, and rate-limited sorption/desorption. Sorption is assumed to be either equilibrium or rate-limited, with the rate-limitation described by either a first-order law, or by Fickian diffusion of contaminant through a spherical immobile pore region. Solutions are arrived at by split operator methods for the transport and one-dimensional Galerkin solutions for the solute concentration equations. The resulting model is tested against an analytical Laplace transform …

Problems Associated With Using Ground Penetrating Radar To Locate A Lnapl Plume, Jodie Mcneil

Masters Theses

The Crystal Refinery in Carson City, Michigan was the site used to test the hypothesis that Ground Penetrating Radar can locate LNAPL plumes. The contamination at the site is in the form of two tree product plumes and a dissolved plume. Three Ground Penetrating Radar antennas were used, a 100 MHz, a 300 MHz and a 500 MHz. Borings with a hand auger were made on some of the GPR lines. Gravel and coarse sand along with product in the form of residual stain and tree product were found in some locations. A vertical electrical sounding and a resistivity profile …

Rodent-Proof Construction And Exclusion Methods, Rex O. Baker, Gerald R. Bodman, Robert M. Timm

Prevention and Control of Wildlife Damage Handbook

The most effective means of limiting rodent damage is rodent-proof construction. New buildings should be designed and built to prevent rodent entry. Rodent-proofing is a good investment. Designing and constructing a rodent-proof building is less expensive than adding rodent-proofing later. Nevertheless, poor maintenance or management practices, such as leaving entry doors and unscreened windows open, will make the bestconstructed building susceptible to rodent entry. Techniques discussed here apply both to new construction and to the modification of existing structures.

Three Distinct Human Thymopoietins Are Derived From Alternatively Spliced Mrnas, Crafford A. Harris, Paula J. Andryuk, Scott Cline, H. Karen Chan, Anan Natarajan, John Siekierka, Gideon Goldstein

Department of Chemistry and Biochemistry Faculty Scholarship and Creative Works

Thymopoietin (TP) was originally isolated as a 5-kDa 49-aa protein from bovine thymus in studies of the effects of thymic extracts on neuromuscular transmission and was subsequently observed to affect T-cell differentiation and function. We now report the isolation of cDNA clones for three alternatively spliced mRNAs that encode three distinct human T-cell TPs. Proteins encoded by these mRNAs, which we have named TPα (75 kDa), TPβ (51 kDa), and TPγ (39 kDa), contain identical N-terminal regions, including sequences nearly identical to that of the originally isolated 49-aa protein, but divergent C-terminal regions. TP mRNAs are expressed in many tissues, …

Santa Clara Magazine, Volume 36 Number 3, Summer 1994, Santa Clara University

Santa Clara Magazine

7 - JAMAICA: THE OTHER SIDE OF PARADISE Religious organizations work to relieve the misery in a nation that, for some, is a vacation wonderland. By Mitch Finley '73 Political and economic analysis by Dennis R. Gordon

12 - I'll SEE YOU IN ADR! More and more people with civil disputes are finding themselves in alternative dispute resolution. But is ADR always the consumer's best choice? By Julie Sly '82

20 - UP CLOSE: MARIO BELOTTI The SCU economics professor of 35 years has become internationally renowned through hard work and (he says) being in the right place at the …

Ua66/8/3 Annual Report, Wku Geography & Geology

WKU Administration Documents

Annual report created by and about WKU Geography & Geology.

Icp Analysis Of Solids/Waste Slurries, Buqian Wang

Masters Theses & Specialist Projects

The direct injection of solids/water slurries into an inductively coupled plasma (ICP) spectrometer offers a rapid and easy method for the analysis of major, minor, and trace elements in coal, coal ash, cements, and refractory materials. In this study aqueous slurries of 6 coals were prepared by milling with a stirred-ball slurry attritor mill and an air impact pulverizer. ICP analysis values obtained for the six coals by the two different grinding methods were compared. Five coal ashes and five check standard reference materials were ground by an attritor mill and analyzed with an ICP spectrometer. Slurries of standard reference …

The Probe, Issue # 145 -- July 1994

The Probe: Newsletter of the National Animal Damage Control Association

Wildlife Damage Management: Announcing a new resource for wildlife damage managers, by Robert H. Schmidt, Editor The PROBE
Publication Available: Hunting Symposium Proceedings
Berryman Institute Announces the Winners of the 1994 Berryman Fellowships

A Study Of Computer Hardware And Software Usage In The Wichita, Kansas Area Business Community, Cheryl L. Rogers

Electronic Theses & Dissertations

For the purpose of informationally equipping educational institutions to prepare students for a future in the business world, this study was conducted with the intent of identifying and analyzing the current computer hardware and software used for word processing, spreadsheet, database, and desktop publishing tasks in Wichita, Kansas, selected area businesses and industries. In addition, this study was designed to determine the factors the business community respondents considered in choosing their computer hardware and software. Finally, the study was intended to ascertain the length of time since computer hardware and software changes had been made within the responding companies and …

Analysis Of The Potential For Plant Uptake Of Trichloroethylene And An Assessment Of The Relative Risk From Different Crop Types, Roy-Alan C. Agustin

Theses and Dissertations

This research expands our limited knowledge on the influence of plants on the fate and effects of trichloroethylene (TCE), providing a screening tool on which to base decisions regarding the need for actual sampling of plants. First, physicochemical properties of TCE--vapor pressure, Henry's Law constant, water solubility, octanol-water partition coefficient, molecular weight, and half-life--were screened against relationships reported in literature to evaluate TCE plant uptake potential. This screening approach indicated TCE may be transferred to plants via retention by root surfaces, root uptake and translocation, and foliar uptake. Next, the PLANTX model developed by Trapp and others was applied to …

Investigation Of Computational And Spectral Analysis Methods For Aeroacoustic Wave Propagation, Florence Odile Vanel

Mechanical & Aerospace Engineering Theses & Dissertations

Most computational fluid dynamics (CFD) schemes are not adequately accurate for solving aeroacoustics problems, which have wave amplitudes several orders of magnitude smaller yet with frequencies larger than the flow field variations generating the sound. Hence, a computational aeroacoustics (CAA) algorithm should have minimal dispersion and dissipation features. A dispersion relation preserving (DRP) scheme is, therefore, applied to solve the linearized Euler equations in order to simulate the propagation of three types of waves, namely: acoustic, vorticity, and entropy waves. The scheme is derived using an optimization procedure to ensure that the numerical derivatives preserve the wave number and angular …

Estimation Of Stratospheric Input To The Arctic Troposphere: 7be And 10be In Aerosols At Alert, Canada, Jack E. Dibb, David Meeker, R C. Finkel, J Southon, Marc W. Caffee, Leonard A. Barrie

Earth Sciences

Concentrations of 7Be and 210Pb in 2 years of weekly high-volume aerosol samples collected at Alert, Northwest Territories, Canada, showed pronounced seasonal variations. We observed a broad winter peak in 210Pb concentration and a spring peak in 7Be. These peaks were similar in magnitude and duration to previously reported results for a number of stations in the Arctic Basin. Beryllium 10 concentrations (determined only during the first year of this study) were well correlated with those of 7Be; the atom ratio 10Be/7Be was nearly constant at 2.2 throughout the year. This relatively high value of 10Be/7Be indicates that the stratosphere …

Reporting On Risk: Who Decides What's News?, William Lanouette

RISK: Health, Safety & Environment (1990-2002)

Dr. Lanouette argues that risks alone do not command national media attention; their implications must first be framed by broader national issues.

Mass Media As An Information Channel And Public Arena, Hans Peter Peters

RISK: Health, Safety & Environment (1990-2002)

Professor Peters argues that several functions of mass media compete and that attempts to improve risk coverage must avoid optimizing one at the expense of others.

Table Of Contents Volume Five, Number Three, Summer 1994, Risk Editorial Board

RISK: Health, Safety & Environment (1990-2002)

Table of contents for the journal RISK: Health, Safety & Environment (ISSN: 1073-8673)

Mass Media And Environmental Risk: Seven Principles, Peter M. Sandman

RISK: Health, Safety & Environment (1990-2002)

Dr. Sandman suggests that, when spokespersons for risk sources are inept in conveying their messages, they and we pay heavily for their mistakes.

Assessment Of Effectiveness Of Buffer Zones In Removing Impurites In Runoff From Areas Treated With Poultry Litter, I. Chaubey, D. R. Edwards, T. C. Daniels

Arkansas Water Resources Center Technical Reports

Land application of animal manures (e.g. poultry litter, poultry manure, and swine manure) to pasture and range can lead to runoff quality degradation during storms that occur soon after application. Vegetative filter strips (VFS) have been shown to reduce pollution in runoff from row-cropped areas but have not been extensively studied in pasture and range settings. This research involved characterizing performance of fescue VFS in improving quality of runoff from pasture land areas treated with poultry litter and swine manure. The VFS were found to be quite effective in reducing off-site transport of ammonia nitrogen (NH3-N), total Kjeldahl nitrogen (TKN), …

Drought And Southern Africa: A Note From The Harare Regional Drought Monitoring Centre, Leonard S. Uganai

Drought Network News (1994–2001)

Drought is a normal part of southern Africa’s climate and one of the most important natural disasters in southern Africa. In fact, it is becoming increasingly unusual for drought not to occur somewhere in southern Africa each year. The dependence of most southern African economies on rainfed agriculture emphasizes the importance of drought early warning products for short- and long-term decision making in various sectors of the national economies of the region. Following the 1991–92 drought, which ravaged more than 80% of southern Africa, many in southern Africa now realize the value of meteorological information in weather-sensitive decisions. Requests for …

Arkansas Rice Research Studies 1993, B. R. Wells

Arkansas Agricultural Experiment Station Research Series

The research reports in this publication represent one year of results; therefore, these results should not be used as a basis for longterm recommendations. Several research reports in this publication dealing with soU fertility also appear in Arkansas Soil Fertility Studies 1993, Arkansas Agricultural Experiment Station Research Series 436. This duplication is the result of the overlap in research coverage between the two series and our effort to inform Arkansas rice producers of all the research being conducted with funds from the rice check-off.

Historical Notes On German Press Coverage Of Technology, Hans Mathias Kepplinger

RISK: Health, Safety & Environment (1990-2002)

Professor Kepplinger accounts for increased negativism in German media coverage of technology by pointing to changes in journalists' role definitions and attitudes.

The Media, Risk Assessment And Numbers: They Don't Add Up, Sharon M. Friedman

RISK: Health, Safety & Environment (1990-2002)

Professor Friedman argues that, for risks to be reported accurately, journalism educators must help their students understand science, numbers and statistics.

A Conceptual Model For Multimedia Database Systems, Shunge Li, Xiangning Liu, Bharat Bhargava

Department of Computer Science Technical Reports

No abstract provided.

Modelling Of Groundwater Flow And Pollutants Affecting Concrete Foundations, Jamil A. Gharsan Moqbil

Theses

This thesis presents a finite difference model and its associated computer program. The model has been developed for simulating the pumpage and predicting the water table fluctuations corresponding to different boundary conditions. The mathematical model solves the partial differential equation of groundwater flow by using the finite different techniques.

The model has been verified against known field measurements taken from existing wells in Al-Ain area. Water samples from these existing wells have been collected and tested in the UAE university laboratories to determine their chemical characteristics. All field data have given close results to those predicted by the model and …

Collective Interpretation Of Seismic Reflection, Gravity, Magnetic, And Resistivity Data In The Salalah Plain, Oman, For Hydrogeologic Purposes, Slyam Bin Saeed Bin Salim Ba-Awain

Theses

An interpretive geophysical study in the growing Salalah Plain, Dhofar Governate, Sultanate of Oman, was made during 1993 and part of 1994.

This investigation stems from the need to develop the main and the only water resource in this region. It is aimed to make use of the combined geophysical tools (seismic rflection, gravity, magnetics and resistivity) and available surface and borehole data to assess the environmental impact of the geophysical results.

Several seismic reflection lines were picked and interpreted; one on a horizon near the Taqah limestone (main aquifer), and the other on a horizon near the Mesozoic- Cenozoic …

The Excitation Mechanism Of Praseodymium-Doped Semiconductors, Paul L. Thee

Theses and Dissertations

This study on praseodymium Pr luminescence in Al_xGa_1-xAs was conducted to enhance the understanding of the excitation mechanism. Pr was implanted at 390 keV with doses from 5 x 10¹² to 5 x 10¹³ cm² into Al_xGa_1-xAs x0.0 to 0.50 wafers which were annealed using the rapid thermal annealing RTA method. Low temperature photoluminescence PL was conducted using an Ar-ion laser and Ge detector. PL emissions of Pr from all hosts include peaks near 1.3 and 1.6 µm which are assigned to the intra-4f transitions of 1G4 yielding 3H5 …