Physical Sciences and Mathematics Commons^™

Three-Reflection Halfwave And Quarterwave Retarders Using Dielectric-Coated Metallic Mirrors, T. F. Thonn, R. M.A. Azzam

Electrical Engineering Faculty Publications

A design procedure is described to determine the thicknesses of single-layer coatings of a given dielectric on a given metallic substrate so that a specified net phase retardance (and/or a net relative amplitude attenuation) between the p and s polarizations is achieved after three reflections from a symmetrical arrangement of three mirrors that maintain collinearity of the input and output beams. Examples are presented of halfwave and quarterwave retarders (HWR and QWR) that use a ZnS-Ag film-substrate system at the CO₂-laser wavelength λ = 10.6 µm. The equal net reflectances for the p and s polarizations are computed …

A Note On Finding A Maximum Empty Rectangle, Mikhail J. Atallah, Greg N. Frederickson

Department of Computer Science Technical Reports

No abstract provided.

A Guide To The Poker Mapping Preprocessor, Fran Berman, Mike Goodrich, Chuck Koelbel, Bill Robison, Karen Showell

Department of Computer Science Technical Reports

No abstract provided.

Edge Grammars: Decidability Results And Formal Language Issues, Francine Berman, Gregory Shannon

Department of Computer Science Technical Reports

No abstract provided.

Comment On Aproaches To The Tricritical Point In Quasibinary Liquid Mixtures, Miron Kaufman, Robert B. Griffiths

Miron Kaufman

No abstract provided.

Evaluation Of Plasma Polymers Of Silanes As Adhesion Promoters For Organic Paint, Y. Matsuda, H. Yasuda

Chemistry Faculty Research & Creative Works

Plasma-polymerized coatings were prepared in a bell-jar-type reactor equipped with a magnetron system behind parallel aluminum electrodes using an a.c. source of frequency 10 kHz. Tetramethoxysilane, dimethyldimethoxysilane and hexamethyldisilane were used as monomers. Alkyd paint was coated on titanium plates onto which plasma polymer films had been deposited, to investigate the characteristics of the plasma-deposited films as adhesion promoters. The relationship between the adhesion strength for the paint and the conditions for the plasma polymerization was studied. The properties of the plasma polymers are dependent on the conditions of plasma polymerization manifested by two domains, namely the energy-deficient and the …

Preparation Of Gas Separation Membranes By Plasma Polymerization With Fluoro Compounds, H. Nomura, P. W. Kramer, H. Yasuda

Chemistry Faculty Research & Creative Works

Plasma polymerization coatings were applied for the preparation of gas separation membranes. Mainly fluoro compounds were used as coating materials. The membranes showed good separation characteristics with high flux for gaseous systems. The plasma polymerization composite parameter given by W/FM plays an important role in obtaining excellent separation characteristics. The correlation between the conversion rate DR/FM, where DR is the deposition rate of plasma polymer, and W/FM is useful to consider the plasma polymer character under the different plasma polymerization conditions (discharge power W and monomer flow rate F). The proper conditions for membrane preparation lie in the intermediate region …

26th Rocky Mountain Conference

Rocky Mountain Conference on Magnetic Resonance

Program and abstracts from the 26th annual meeting of the Rocky Mountain Conference, co-sponsored by the Rocky Mountain Section of the Society for Applied Spectroscopy and the Rocky Mountain Chromatography Discussion Group. Held in Denver, Colorado, August 7-8, 1984.

Legal Status Of Developed Tidelands In The Northeast: A Three-State Sampling, Anne F. Ackenhusen

Marine Affairs Theses and Major Papers

The tidelands law of the United States has evolved sporadically. As the nation's population pressures have increased, and every conceivable type of development hasattempted to locate in the coastal zone (1), the regulationof tidelands has become increasingly stringent. No longer can a private party fill an acre of tidelands on whim. Inthe past, however, unauthorized tideland development was a frequent occurrence. Thus current state governments must deal with a legacy of improperly filled tidelands. This paper will examine some of the states' attempts to address the problem of illegally improved tidelands.

Sinking Of Volcanic Ash In Uncompacted Sediment In Williams Lake, Washington, Roger Y. Anderson, Edward Nuhfer, Walter E. Dean

United States Geological Survey: Staff Publications

Volcanic ash from the eruption of Mount St. Helens on 18 May 1980 fell into Williams Lake in eastern Washington and was temporarily suspended at the sediment-water interface. After several months of compaction, the ash layer broke up and sank into lower density uncompacted lake sediment. Stratigraphic time displacements of several hundred years and a failure to recognize discontinuous ash layers in sediment cores are possible consequences of this process.

Structure, Morphology And Crystal Growth Of Bacterial Magnetite, Stephen Mann, Richard B. Frankel, Richard P. Blakemore

Physics

Recent high-resolution transmission electron microscopy (HRTEM) studies of the structure and morphology of bacterial magnetite (Fe₃O₄) crystals isolated from a magnetotactic coccus¹ and from an unidentified bacterium extracted from sediment² have shown the crystals to be well ordered single-domain particles with a morphology based on a hexagonal prism of {011} faces truncated by specific low index planes. We report here a HRTEM study of intact magnetite crystals (magnetosomes) in the microaerophilic bacterium Aquaspirillum magnetotacticum, grown in pure culture^3,4. Our aim has been to investigate the structure, morphology and crystal growth of …

A Simple Method For Organizing Nearly Optimal Binary Search Trees, Joy L. Henderson, John R. Metzner

Computer Science Technical Reports

Improving the efficiency of retrieving information concerns users of computer systems involved in many applications- One way of addressing this concern is to organize a sorted sequence into a binary search tree. Knuth's Algorithm K is a bottom-up organization algorithm that always constructs a binary tree which minimizes average search time. However, the cost of executing Algorithm K is prohibitive for a large tree. The aim of this work is to find a less costly method of organizing sorted sequences into nearly-optimal binary search trees.

We present a top-down organization method which yields better average search times than top-down methods …

Developing A Fertilizer Program For Tobacco, J. L. Sims

Soil Science News and Views

Use of adequate amounts of required fertilizer nutrients are necessary to increase both yield and quality of tobacco if they are lacking in a soil. However, to insure maximum profits from the tobacco crop, careful consideration must be given to fertilizer management (kinds, rates, and methods and times of fertilizer application), the chemical and physical characteristics of the soil, and the crops grown in rotation with tobacco. To develop a profitable fertilization program for tobacco requires thoughtful planning on the part of the grower. Late summer and early fall is a good time to make these plans for the future.

The Design And Implementation Of The Programming Language Natural, Alan L. Sparks, Thomas J. Sager, Arlan R. Dekock

Computer Science Technical Reports

This paper reports progress on the development of the programming language Natural, currently under design by Dr. Thomas J. Sager at the University of Missouri--Rolla. Natural is a very high-level language with a mathematical flavor, and includes several concepts relatively uncommon in programming language design.

The text also discusses an implementation on the IBM Personal Computer of Mini-Natural, a subset of Natural, and presents examples of programs written in Mini-Natural.

Factors Explaining The Use Of Health Care Services By The Elderly, Paula Diehr, Connie Evashwick

Paula Diehr

The Anderson model of health services utilization, which relates use of service to predisposing, enabling, and need factors, has not often been applied to an elderly population. In this study, the factors of the Andersen model were used prospectively to predict utilization for a population sample of 1,317 elderly persons. Taken alone, the NEED construct was the most important single predictor of use of physician services, hospitalizations, ambulatory care, and home care. PREDISPOSING factors were better predictors of the use of dental services. Some of the variables studied were not related to utilization in the direction that would have been …

Centers Of Polymer Research; Polymer Science And Engineering In Academy Institutes In The Southern Part Of The People's Republic Of China (South Of The Yangtze), Otto Vogl, W. Huang, Z. Ye, Z. Zhang, M. Cao

Otto Vogl

No abstract provided.

Pseudodimensional Variation And Tricriticality Of Potts Models By Hierarchical Breaking Of Translational Invariance, Miron Kaufman, Mehran Kardar

Miron Kaufman

Potts models with equivalent- and nearest-neighbor interactions are solved exactly on Cayley trees. A parameter D is identified that plays a role similar to the spatial dimension on Bravais lattices. Breaking translational symmetry by the Cayley-tree hierarchy reduces D, leading to a changeover in the order of the phase transition via a novel tricritical point.

Aromatic Amine--Haloboranes : Evidence For Trigonal Boronium Cations, Debra H. Reid

Master's Theses

In the last twenty years Lewis adducts of boron trihalides and mixed boron trihalides have been examined using nuclear magnetic resonance spectroscopy. The donor to which the boron trihalide attaches has generally been some type of amine (strong donor), though oxygen, sulfur, phosphorous, and other donors ahve also been studied. The boron trihalide portion serves as the Lewis acid. Various nuclei (1H, 13C, 15N, 11B, 19F) have been examined in such boron trihalide adducts and the general trend in signal position in all 5 nuclei observed is (in order of increasing downfield shift) BF3

The acid strength of the boron …

Evolution Plots Of Software Metrics From A Program Construction Experiment (Summer-83) (Thesis), Andrew Shenq-Yen Want

Department of Computer Science Technical Reports

No abstract provided.

Angular Differential And Total Cross Sections For The Excitation Of Atomic Hydrogen To Its N=2 Level By 25-150-Kev Hydrogen Molecular Ions, Jerry Peacher, Paul J. Martin, Denver G. Seely, Judith E. Aldag, Thomas J. Kvale, E. Redd, D. M. Blankenship, V. C. Sutcliffe, John T. Park

Physics Faculty Research & Creative Works

Experimentally and theoretically determined differential and total cross sections are reported for excitation of atomic hydrogen to its n=2 level by 25-150-keV hydrogen molecular ions. The differential cross sections decrease 3-4 orders of magnitude over the measured center-of-mass scattering-angular range from 0 to 4.5 mrad. The results of a first Born approximation and two other theoretical calculations based upon the Glauber approximation are presented and compared with the experimental results. Both calculations based on the Glauber approximation agree fairly well with the experimental results. The Born approximation agrees moderately well with the experimental results at the very small scattering angles …

Difference Equations, Isoperimetric Inequality And Transience Of Certain Random Walks, Jozef Dodziuk

Publications and Research

No abstract provided.

The Probe, Issue 45 - August 1984

The Probe: Newsletter of the National Animal Damage Control Association

THE PROBE
National Animal Damage Control Association No. 45 August, 1984
HR 1797, the Anti-trapping Bill
Bureau of Land Management
ASIW Publication SIP 817
Computer Rats
New device on the market that warns "most types of animals" of an approaching vehicle.
Office of Management and Budget
Letters to Ye Ed
ADC
New Member
Utah prairie dog
Red, Eastern and Western Gray Kangaroos
Rabies
Skunks

Influence Of Crystal Fields On The Quasimetallic Reflection Spectra Of Crystals: Optical Spectra Of Polymorphs Of A Squarylium Dye, M. Tristani-Kendra, Craig J. Eckhardt

Craig J. Eckhardt Publications

The reflection and Kramers–Kronig absorption spectra have been obtained from the monoclinic and triclinic polymorphs of a squarylium dye, 2,4-bis(4-diethylamino-2-hydroxy phenyl) cyclobutadienediylium-1,3-diolate. The extremely different optical responses were found to arise from two molecular singlet transitions of essentially long axis polarization. Successful application of a four oscillator molecular exciton–polariton theory required the use of point charge densities rather than point dipoles in an extension of the theory which employed both interactions between the two singlets as well as a frequency dependent lattice damping. An intermolecular charge transfer transition is also assigned. The Journal of Chemical Physics is copyrighted by The …

Late Quaternary Vegetational History At Cupola Pond, Ozark National Scenic Riverways, Southeastern Missouri, Everett Newman Smith Jr.

Masters Theses

A 12 meter core of lacustrine sediments from Cupola Pond, Ripley County, Missouri, Provides the first continuous record in the Ozark Plateaus Region of ecologic changes from full-glacial time to the present. From 17,100 to 15,350 yr B.P., forest communities were dominated by jack and/or red pine (northern Diploxylon Pinus) and spruce (Picea). A late-glacial, transitional forest of oak (Quercus), ash (Fraxinus), pine and spruce characterized the upland vegetation that occurred during a period of climatic amelioration between 15,350 and 12,300 yr B.P. The early Holocene period from 12,300 to 9,100 yr B.P. …

Speed Of The Photorefractive Effect In A Batio3 Single Crystal, Stephen Ducharme, Jack Feinberg

Stephen Ducharme Publications

We present data on the speed of light-induced refractive index changes in a BaTiO₃ single crystal. The light-induced erasure rate of a refractive index grating is shown to depend on optical intensity as I ^x where x<1. The exponent x depends weakly on temperature and increases from 0.62±0.02 to 0.71±0.02 when the temperature is varied between 12 and 40 °C. The sublinear dependence of rate on intensity implies that higher optical intensity is required to achieve high-speed operation of BaTiO₃ devices than previously thought. The dark erasure rate has an anomolously strong temperature dependence; it increases by a factor of …

Finite Element Simulation Of Saturated-Unsaturated Subsurface Flow, George E. Blandford

KWRRI Research Reports

A two-dimensional transient model for flow through saturated-unsaturated porous media is developed, The model numerically solves the pressure head dependent or moisture content dependent form of Richard's equation. The model code uses isoparametric quadratic triangular and/or quadrilateral finite elements for the geometric representation and for the weak Galerkin spacial integrations. An implicit, unconditionally stable single-step numerical time integration scheme with an oscilliatory noise reduction option is utilized for the temporal discretization. The highly efficient symmetric skyline (profile) solution scheme is used to solve the resulting simultaneous equations. The nonlinear subsurface flow parameters are approximated using cubic spline interpolation. The element …

Impact Assessment Of Coal Slurry Pipelines On Water Resources Utilization And Allocation, Muhammad Najmus Saquib, M. Levent Kavvas, David T. Kao, Lindell E. Ormsbee

KWRRI Research Reports

Pike county, the largest coal producing and exporting county from the state of Kentucky was studied to assess the impact of a possible coal slurry pipeline project on the water resources allocation and utilization in the region. Potential coal slurry pipelines from the region were identified and water requirement for operating several hypothetical pipelines were computed by using a recently developed computer program. Climatological data for the county were collected and analyzed for a 29-year period of record with a view to determining the monthly net consumptive use in the region. Available groundwater data for the region was also collected …

Toxicological Studies On Aquatic Contaminants Originating From Coal Production And Utilization: The Induction Of Tolerance To Silver In Laboratory Populations Of Fish And The Chronic Toxicity Of Nickel To Fish Early Life Stages, Wesley J. Birge, Jeffrey A. Black, James F. Hobson, Albert G. Westerman

KWRRI Research Reports

Aquatic toxicity studies were performed on two important coal-derived contaminants, silver and nickel. Silver was investigated with regard to metal-induced tolerance in laboratory populations of the fathead minnow (Pimephales promelas). Fish were exposed to acute silver concentrations following acclimation to sublethal exposures of this metal. Based on median lethal times (LT50), animals which had received 14 days prior exposure to 1.5 and 15 μg Ag/L were three to four times more resistant to silver than were previously unexposed organisms. This metal-induced resistance was not a sustained response. After organisms which had been acclimated to 15 μg/L had been transferred to …

Discharge And Travel Time Determinations In The Royal Spring Groundwater Basin, Kentucky, John Thrailkill, Douglas R. Gouzie

KWRRI Research Reports

Groundwater flow in many karst regions, including the Inner Bluegrass Karst Region of central Kentucky in which the study area was located, is unlike groundwater flow in granular aquifers. At least the major flows are turbulent and often with a free surface in large conduits, and applying concepts based on Darcy's Law to describe and model these flows is inappropriate. Parameters such as linear velocity, channel geometry, and conveyance used to describe surface streamflows are more applicable, and the primary objective of the project was to estimate these in a groundwater basin using the travel time of dye slugs and …

On The Genus Of A Block Design, Joan Marie Rahn

Dissertations

The genus of a design (BIBD or PBIBD) is defined to be the genus of its corresponding hypergraph (objects as vertices, blocks as edges); that is, the genus of the bipartite graph associated with the hypergraph in a natural way. The Euler formula is used to establish a lower bound (gamma) for the genus of a block design. An imbedding of the design of the surface of genus (gamma) is then described by a voltage hypergraph or voltage graph. Use of the lower bound formula leads to a characterization of planar BIBDs. A connection between a block design derived from …