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1999

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On The Exactness Of An S-Shaped Bifurcation Curve, Philip Korman, Yi Li Jan 1999

On The Exactness Of An S-Shaped Bifurcation Curve, Philip Korman, Yi Li

Mathematics and Statistics Faculty Publications

For a class of two-point boundary value problems we prove exactness of an S-shaped bifurcation curve. Our result applies to a problem from combustion theory, which involves nonlinearities like for .

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Loss Detection In The Dairy Industry., Michael Quealy Jan 1999

Loss Detection In The Dairy Industry., Michael Quealy

Theses

In any waste management program, the primary objective must be minimizing product loss without having an affect on product quality. Good waste management is recognized as good manufacturing practice and optimizes the processes to gain the highest possible yield from the available raw materials. A good waste management program must involve the daily monitoring of effluent from the plant for volume and strength. This data needs to be analyzed sufficiently to obtain clear pictures of what problems are present and where they are originating. If this is achieved then the task of reducing the product loss is made much easier. …

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Nonperturbative Aspects Of The Quantum Chaos Theory, Yuri Alexander Dabaghian Jan 1999

Nonperturbative Aspects Of The Quantum Chaos Theory, Yuri Alexander Dabaghian

Open Access Dissertations

No abstract provided.

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J Am Coll Dent 1999 66 3 Jan 1999

J Am Coll Dent 1999 66 3

Journal of the American College of Dentists

The Journal of the American College of Dentists (JACD) publishes scholarly articles, editorials, essays, and reflections addressing the ethical, professional, and social dimensions of dentistry. The Journal serves as a forum for advancing ethics, professionalism, leadership, and excellence within the dental community. By fostering dialogue across disciplines and perspectives, JACD provides readers with insights that encourage ethical, professional practice, lifelong learning, and service to the public, reinforcing dentistry’s commitment to advancing oral healthcare and the common good.

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83rd Annual Meeting, 1999. Program, Academy Editors Jan 1999

83rd Annual Meeting, 1999. Program, Academy Editors

Journal of the Arkansas Academy of Science

No abstract provided.

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Changes In Soil Chemistry Beneath Exposed Poultry House Pads And Manure Storage Areas, Stanley L. Chapman, William R. Teague Jan 1999

Changes In Soil Chemistry Beneath Exposed Poultry House Pads And Manure Storage Areas, Stanley L. Chapman, William R. Teague

Journal of the Arkansas Academy of Science

Concerns about nitrates in private drinking water supplies in the older poultry growing areas of Arkansas prompted soil and water testing in the early 1990's. Exposed poultry house pads were recognized as a potential source of nitrates in the groundwater. Soils beneath nine different poultry house pads in five counties were sampled in 10-30 cm increments to bedrock or to a maximum sampling depth of 90 cm. The nine sites had been exposed to natural weathering conditions ranging from never to for more than 20 years. Routine soil tests were conducted by the University of Arkansas Soil Testing Lab at …

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Journal Of The Arkansas Academy Of Science - Volume 53 1999, Academy Editors Jan 1999

Journal Of The Arkansas Academy Of Science - Volume 53 1999, Academy Editors

Journal of the Arkansas Academy of Science

No abstract provided.

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Effects Of Predation On Two Species Of Stream-Dwelling Crayfish (Orconectes Marchandi And Cambarus Hubbsi) In Pool And Riffle Microhabitats, Heidi Dukat, Daniel D. Magoulick Jan 1999

Effects Of Predation On Two Species Of Stream-Dwelling Crayfish (Orconectes Marchandi And Cambarus Hubbsi) In Pool And Riffle Microhabitats, Heidi Dukat, Daniel D. Magoulick

Journal of the Arkansas Academy of Science

Community structure may be governed by many abiotic and biotic factors. Of the biotic factors, predation is often considered to be critical in structuring freshwater stream communities. In the Warm Fork of the Spring River, the crayfish Cambarus hubbsi is found mainly in riffles, whereas the crayfish Orconectes marchandi is found in high numbers in pools. We hypothesized that predation, mainly by fish, is a factor causing this segregation. Higher predation rates for C. hubbsi than 0. marchandi in the pools and higher predation rates for 0. marchandi than C. hubbsi in the riffles were expected. A transplant tethering experiment …

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Locating Napls In Ground Water Using Partitioning Fluorescent Dyes, A. Ghanem, J. Smith, M. Elzey, T. S. Soerens, M. A. Miah, G. Thoma Jan 1999

Locating Napls In Ground Water Using Partitioning Fluorescent Dyes, A. Ghanem, J. Smith, M. Elzey, T. S. Soerens, M. A. Miah, G. Thoma

Journal of the Arkansas Academy of Science

A major challenge in ground water remediation is locating nonaqueous phase liquids (NAPLs). Partitioning tracers can be used to identify NAPL sources between injection and extraction wells. NAPLs are only slightly soluble in water, pose a long-term source of groundwater contamination, and can be difficult to remove. The complexity of recovery processes requires the development of new technologies that guarantee cost effective methods for locating and quantifying NAPLs. Traditional methods like soil coring have been inefficient since they underestimate the quantity of NAPLs and are expensive. Partitioning tracer tests are some of the most recent methods developed for locating these …

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Analysis Of Phytoestrogens By High Performance Liquid Chromatography, Anne A. Grippo, Yan Xie, Benjamin L. Rougeau, William V. Wyatt Jan 1999

Analysis Of Phytoestrogens By High Performance Liquid Chromatography, Anne A. Grippo, Yan Xie, Benjamin L. Rougeau, William V. Wyatt

Journal of the Arkansas Academy of Science

Phytoestrogens are biochemicals synthesized in plants which mimic steroidal estrogen activity in mammals. Analysis of these compounds in the legumes which produce them and in body fluids is important to the study of their physiological effects. High pressure liquid chromatography (HPLC) has been found to be an efficient and sensitive method of identification and quantitation of isoflavonoids, one class of phytoestrogen. Here we report the separation of three isoflavonoids, biochanin A, genistein and daidzein using an HPLC system with a Cg reverse phase column and a linear gradient mobile phase containing acetonitrile and acetic acid/water (10/90, v/v) over 60 minutes. …

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Comparison Of Environmental Assessments Of Two Proposed Harbor Expansions On The Mississippi River, Richard S. Grippo, Bobby Bennett, Randel T. Cox Jan 1999

Comparison Of Environmental Assessments Of Two Proposed Harbor Expansions On The Mississippi River, Richard S. Grippo, Bobby Bennett, Randel T. Cox

Journal of the Arkansas Academy of Science

The National Environmental Policy Act of 1969 requires federally funded projects to be evaluated for environmental impact to determine if a complete environmental impact statement must be prepared. Such an environmental assessment must also be included in any feasibility study for harbor enlargement and bank stabilization measures under the Water Resources Development Act. Population increases, coupled with economic growth from increased agricultural and industrial productivity, have resulted in increased Mississippi River barge transportation needs for Arkansas and Missouri. We report here two such environmental assessments of planned harbor expansions of the New Madrid County and Pemiscot County ports in the …

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Effects Of Science Crusade In Arkansas, Mostafa Hemmati, Heath Spillers Jan 1999

Effects Of Science Crusade In Arkansas, Mostafa Hemmati, Heath Spillers

Journal of the Arkansas Academy of Science

The NSF funded Arkansas Statewide Systemic Initiative (1992), developed with the intent to restructure mathematics and science education in Arkansas, is a recent reform in the Arkansas educational system. The project aimed at changing Arkansas students' attitudes toward science and mathematics, improving student learning and performance, introducing appropriate technology into the classrooms, and allowing for a lasting community involvement in the Arkansas educational system. To implement change through Arkansas Science and Math Crusades, the project has provided large scale teacher training and professional development opportunities to Arkansas school teachers. This reform effort in education started in 1992. A search of …

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Microlevel Climate Change Due To Changes In Surface Features In The Ganges Delta, M. M. Adel Jan 1999

Microlevel Climate Change Due To Changes In Surface Features In The Ganges Delta, M. M. Adel

Journal of the Arkansas Academy of Science

The Ganges had been the world's 8th largest river in terms of the volume of water discharge of 490 km3/yr to the ocean 4 prior to 1975. Since that time, over a period of two decades, India has reduced the Ganges discharge through Bangladesh to 40% from its original annual average discharge of 1,932+7-223 m3 /s by diverting water for irrigation in her upper states. The , resulting consequences have been disastrous due to the depletion of the surface water resources. One of the devastating consequences has been the generation of extreme climate. The summertime maximum temperature has risen to …

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Morphometry And Limnology Of Ferguson Lake, Saline County, Arkansas, John D. Rickett, E. P. (Perk) Floyd Jan 1999

Morphometry And Limnology Of Ferguson Lake, Saline County, Arkansas, John D. Rickett, E. P. (Perk) Floyd

Journal of the Arkansas Academy of Science

To more fully understand Ferguson Lake as an ecosystem and eventually relate its water quality and production potential to fisheries management, several limnological variables were sampled monthly from April 1997 through March 1999. Vertical profiles of temperature and dissolved oxygen were recorded, and water samples from 0.5 m. depth were tested for turbidity, pH, total alkalinity, total hardness, ortho-phosphate, nitrate-nitrogen, sulfate, iron and specific conductance. Evaporation rate experiments, spillway discharge and rainfall records were used to estimate lake hydrology. Depth transects on the lake and USGS topographic maps were used to measure and calculate morphometric and watershed features. The lake …

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Synthesis And Molecular Structure Of [Cpru(Pph3)(Pms)2]Otf1.3/4 C2>H4C12, Paul M. Nave, Mark Draganjac, A. W. Cordes, Tosha M. Barclay Jan 1999

Synthesis And Molecular Structure Of [Cpru(Pph3)(Pms)2]Otf1.3/4 C2>H4C12, Paul M. Nave, Mark Draganjac, A. W. Cordes, Tosha M. Barclay

Journal of the Arkansas Academy of Science

No abstract provided.

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Electron Shock Waves, Frances Terry, Mostafa Hemmati Jan 1999

Electron Shock Waves, Frances Terry, Mostafa Hemmati

Journal of the Arkansas Academy of Science

No abstract provided.

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Publication Policies And Suggestions For Authors, Academy Editors Jan 1999

Publication Policies And Suggestions For Authors, Academy Editors

Journal of the Arkansas Academy of Science

No abstract provided.

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Vision 1999 Jan 1999

Vision 1999

Vision

No abstract provided.

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1999-2000 Course Catalog, University Of Montana--Missoula. Office Of The Registrar Jan 1999

1999-2000 Course Catalog, University Of Montana--Missoula. Office Of The Registrar

University of Montana Course Catalogs, 1895-2024

An annual catalog of courses and course descriptions offered at the University of Montana.

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The Golden "M" Project: History Lost And Found, Sandra Koppenberg Fisher Jan 1999

The Golden "M" Project: History Lost And Found, Sandra Koppenberg Fisher

Graduate Student Theses, Dissertations, & Professional Papers

No abstract provided.

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Antitrust On The Rebound Essay, Joseph M. Alioto Jan 1999

Antitrust On The Rebound Essay, Joseph M. Alioto

Santa Clara Law Review

No abstract provided.

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Simulation Of The Formation And Propagation Of The Thermal Bar On Lake Ontario, Dilkushi Anuja De Alwis Jan 1999

Simulation Of The Formation And Propagation Of The Thermal Bar On Lake Ontario, Dilkushi Anuja De Alwis

Theses

Computer-based, mathematical models that simulate spatially distributed and time dependent environmental processes are increasingly recognized to provide diagnostic and productive outputs for the assessments of environmental factors. Mathematical models have been utilized since 60's to study the water quality, the circulation structure and the seasonal changes of large water bodies such as the Great Lakes. Analysis of changes in water quality related to seasonal cycles such as the formation and the propagation of the thermal bar requires spatial and temporal models, with high resolution. The overall objective of this study was to integrate geo-referenced site-specific spatial data to a 3D …

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Reply To Comment On ‘Nondipole Resonant X-Ray-Raman Spectroscopy: Polarized Inelastic Scattering At The K Edge Of Cl2,’, J. D. Mills, J. A. Sheehy, T. A. Ferrett, S. H. Southworth, R. Mayer, Dennis W. Lindle, P. W. Langhoff Jan 1999

Reply To Comment On ‘Nondipole Resonant X-Ray-Raman Spectroscopy: Polarized Inelastic Scattering At The K Edge Of Cl2,’, J. D. Mills, J. A. Sheehy, T. A. Ferrett, S. H. Southworth, R. Mayer, Dennis W. Lindle, P. W. Langhoff

Chemistry and Biochemistry Faculty Research

Mills et al. Reply: In their Comment on our Letter [1], Gel’mukhanov and Ågren [2] reiterate recent assertions [3] based on their earlier theoretical studies [4]. The primary purpose of their Comment is apparently to refute our stated conclusion that core-excited-state localization/ delocalization mechanisms are irrelevant to interpretations of reported Raman scattering experiments on homonuclear diatomic molecules.

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What The Twins Saw, Paul F. Campos Jan 1999

What The Twins Saw, Paul F. Campos

Publications

No abstract provided.

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An Investigation Of Evolutionary Computing In Systems Identification For Preliminary Design, Andrew Harry Watson Jan 1999

An Investigation Of Evolutionary Computing In Systems Identification For Preliminary Design, Andrew Harry Watson

School of Engineering, Computing and Mathematics Theses

This research investigates the integration of evolutionary techniques for symbolic regression. In particular the genetic programming paradigm is used together with other evolutionary computational techniques to develop novel approaches to the improvement of areas of simple preliminary design software using empirical data sets. It is shown that within this problem domain, conventional genetic programming suffers from several limitations, which are overcome by the introduction of an improved genetic programming strategy based on node complexity values, and utilising a steady state algorithm with subpopulations. A further extension to the new technique is introduced which incorporates a genetic algorithm to aid the …

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Transformation Of Multidirectional Sea Field And Computational Study, Suzana Ilic Jan 1999

Transformation Of Multidirectional Sea Field And Computational Study, Suzana Ilic

School of Engineering, Computing and Mathematics Theses

A computational model based on the evolution equation for water waves (Li, 1994b) derived from the original Berkhoffs (1972) "Mild Slope Equation" is tested against multidirectional sea data. The model accounts for reflection as well as diffraction-refraction processes, which is important for applications involving coastal structures. The accuracy and convergence of the numerical solution, as well as the possibility of the implementation of an adaptive numerical scheme are investigated and implemented. The model was firstly tested using laboratory measurements (Briggs et al, 1995) of random directional wave diffraction around a semi-infinite breakwater on a flat bottom. These tests confirm the …

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Trade And The Environment: A Political Model Of International Public Goods Problem., Qingshui Zhou Jan 1999

Trade And The Environment: A Political Model Of International Public Goods Problem., Qingshui Zhou

Graduate Theses, Dissertations, and Problem Reports (ETD)

In recent decades there has been a debate over the entwined issues of trade and the environment, and the 1990s witnessed a great rise in global environmental concerns. The purpose of the present study is to seek a cooperative solution to these concerns. Postwar environmental movement, interaction of trade and the environment, and the reconciliation issues are reviewed. Methodologies to studying these issues are categorized into (1) international trade approaches, and (2) environmental economics approaches. A political model-cost sharing game is then proposed. Specifically, environmental problems resulting from trade are treated as international public goods and the issue of optimal …

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The Use Of Propositional Structures And Subgoals In Solving Multi-Step College Statistical Word And Formula Problems., Deborah Joan Hendricks Jan 1999

The Use Of Propositional Structures And Subgoals In Solving Multi-Step College Statistical Word And Formula Problems., Deborah Joan Hendricks

Graduate Theses, Dissertations, and Problem Reports (ETD)

This experiment studied the effect of size and format of instructions given to college students enrolled in an introductory statistics course on the number of errors committed and the amount of time required in order to complete a problem. A 3 (size) by 2 (format) factorial design was used. The three sizes of instruction given were propositional structures, subgoals, and complete algorithm. The two formats used were word and formula. The dependent variables used to study errors were Completed Errors, Total Errors, and Accuracy. The dependent variables used to study time were Solution Time, Steps Attempted, Errors per Minute, and …

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The Development Of A Droplet Formation And Entrainment Model For Simulations Of Immiscible Liquid-Liquid Flows., Wesley Michael Wilson Jan 1999

The Development Of A Droplet Formation And Entrainment Model For Simulations Of Immiscible Liquid-Liquid Flows., Wesley Michael Wilson

Graduate Theses, Dissertations, and Problem Reports (ETD)

Droplet formation is a common phenomenon in turbulent mixing and has many practical applications in emulsion technology, surface agents, and liquid-liquid extraction. The ability to predict the relative sizes and distributions of fluid droplets formed from mixing events is a complex problem which is dependent on many different parameters including geometric considerations, the nature and physical properties of the fluids in question, turbulence parameters, buoyancy and body forces, and flow history. While there have been many researchers who have analyzed this problem for both liquid-liquid and gasliquid systems, the present study will focus only on droplet formation in immiscible liquid-liquid …

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Optimal Hidden Markov Models, Bill Frederick Mckee Jan 1999

Optimal Hidden Markov Models, Bill Frederick Mckee

School of Engineering, Computing and Mathematics Theses

In contrast with training algorithms such as Baum-Welch, which produce solutions that are a local optimum of the objective function, this thesis describes the attempt to develop a training algorithm which delivers the global optimum Discrete ICdden Markov Model for a given training sequence. A total of four different methods of attack upon the problem are presented. First, after building the necessary analytical tools, the thesis presents a direct, calculus-based assault featuring Matrix Derivatives. Next, the dual analytic approach known as Geometric Programming is examined and then adapted to the task. After that, a hill-climbing formula is developed and applied. …

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