Physical Sciences and Mathematics Commons^™

Random-Field Critical Behavior And The Ginzburg Criterion, Miron Kaufman, Mehran Kardar

Miron Kaufman

The Ginzburg criterion for crossover from classical to nonclassical critical behavior is derived in the presence of random fields. Experiments on dilute antiferromagnets in a field are examined, and the possibility of such a crossover is investigated. We also point out that the (necessarily) symmetric logarithmic divergence observed in birefringence measurements can be accompanied by a discontinuity, and a fitting form which allows for this and other corrections to scaling is proposed.

Uses And Abuses Of Wastewater Injection Wells In Hawaii, F. L. Peterson, June Ann Oberdorfer

Faculty Publications

During the past two decades in Hawaii, more than 500 injection wells for the disposal of domestic sewage wastewater have been constructed and operated. Thus far, contamination of potable groundwater supplies has not been a problem. Many of the injection wells, however, have not performed as designed, and aquifer clogging and reduced injection capacity have produced numerous well failures resulting in public health, legal, and financial problems. Factors most commonly responsible for the well problems have been unfavorable hydrogeology, underdesign of injection well capacity, poor effluent quality, and lack of injection well maintenance. Detailed study of clogging mechanisms in the …

Explicit Equations For The Polarizing Angles Of A High-Reflectance Substrate Coated By A Transparent Thin Film, R. M.A. Azzam

Electrical Engineering Faculty Publications

Simple explicit equations are derived that determine the angles of incidence at which the parallel and perpendicular polarization components of light are extinguished on reflection from a transparent film coating a high-reflectance (metallic) substrate. The polarizing angles obtained from our approximate expressions are in excellent agreement with those determined by iterative numerical solution of the exact nonlinear equations that govern such angles. For the approximation to be valid, the intensity reflectance of the film-substrate interface, evaluated at the critical angle of the film-ambient interface, must exceed 0.5.

Monthly Planet, 1985, March, David Kuester, Huxley College Of The Environment, Western Washington University

The Planet

No abstract provided.

Summary Abstract: Capacitance-Voltage Characteristics In Modulation Doped Heterojunction Fets, George B. Norris, David C. Look, W. Koop, J. Klem, H. Morkoç

Physics Faculty Publications

No abstract provided.

Environmental Impact Of Being Busy In The Creation, Delmar Vander Zee

Pro Rege

No abstract provided.

The Prairie Naturalist Volume 17, No. 1. March 1985

The Prairie Naturalist

Paul B. Kannowski, Editor

Nikki R. Seabloom, Assistant Editor

Douglas H. Johnson, Book Review Editor

TABLE OF CONTENTS

COMMUNITY ANALYSIS OF THE FOREST VEGETATION IN THE LOWER PLATTE RIVER VALLEY, EASTERN NEBRASKA ▪ S. J. Rothenberger

RECOLONIZATION OF A BURNED PRAIRIE BY MEADOW VOLES (Microtus pennsylvanicus) ▪ P. L. Vacanti and K. N. Geluso

AMERICAN COOT HABITAT IN NORTH DAKOTA ▪ H. A. Kantrud

OBSERVATIONS ON PRAIRIE DOG DISPERSAL IN MONTANA ▪ C. J. Knowles

WINTER FOOD HABITS OF THE SWIFT FOX ON THE CENTRAL HIGH PLAINS ▪ D. M. Zumbaugh and J. R. Choate

BOOK REVIEW

Ground …

Photoemission, Electronic Structure, And Magnetism In Vpd3, D.K. Misemer, S. Auluck, David J. Sellmyer, Sitaram Jaswal, A.J. Arko

David Sellmyer Publications

Electronic and magnetic states in the ordered compound VPd₃ have been investigated with photoemission measurements and self-consistent band-structure calculations. The linear combination of muffin-tin orbitals method was used to study VPd₃ in a hypothetical cubic crystal structure and the actual tetragonal crystal structure, and the calculations were performed for both paramagnetic and spin-polarized configurations. The results for the cubic structure are in agreement with earlier calculations, while the results from the tetragonal structure are in much better agreement with the photoemission and other measurements.

A Birefringence Relaxation Determination Of Rotational Diffusion Of Magnetotactic Bacteria, Charles Rosenblatt, Richard B. Frankel, Richard P. Blakemore

Physics

The orientational relaxation of the magnetotactic bacterium Aquaspirillum magnetotacticum is observed by the decay of the optical birefringence upon switching off an aligning magnetic field. The data yield a rotational diffusion constant D_r ≅ 0.13 s¹ and information about cell sizes that is consistent with optical microscopy data.

Uses And Abuses Of Wastewater Injection Wells In Hawaii, F. L. Peterson, June Ann Oberdorfer

June Ann Oberdorfer

During the past two decades in Hawaii, more than 500 injection wells for the disposal of domestic sewage wastewater have been constructed and operated. Thus far, contamination of potable groundwater supplies has not been a problem. Many of the injection wells, however, have not performed as designed, and aquifer clogging and reduced injection capacity have produced numerous well failures resulting in public health, legal, and financial problems. Factors most commonly responsible for the well problems have been unfavorable hydrogeology, underdesign of injection well capacity, poor effluent quality, and lack of injection well maintenance. Detailed study of clogging mechanisms in the …

Efficient Nonlinear Parameter Estimation For Exponential Type, Least Square Approximation, Donald Greenspan

Mathematics Technical Papers

A computer algorithm is described for fitting data sets by least squares to the functions [see pdf for notation]. A non matrix form of Newton's method is utilized which is economical, easily implementable, and exceptionally fast. Computer examples are described and discussed.

Safety Evaluation Report Related To The Renewal Of The Operating License For The Triga Training And Research Reactor At The University Of Utah, United States Nuclear Regulatory Commission, Office Of Nuclear Reactor Regulations

Radioactive Materials

This Safety Evaluation Report for the application filed by the University of Utah (UU) for a renewal of operating license R-126 to continue to operate a training and research reactor facility has been prepared by the Office of Nuclear Reactor Regulation of the U.S. Nuclear Regulatory Commission. The facility is owned and operated by the University of Utah and is located on its campus in Salt Lake City, Salt Lake County, Utah. The staff concludes that this training reactor facility can continue to be operated by UU without endangering the health and safety of the public.

Electron Doubly Differential Cross Section For 0.5-Mev H--He Detachment Collisions, Chang-Hwan Park, Anthony F. Starace, Joseph Macek

Anthony F. Starace Publications

A comprehensive theoretical treatment is presented for the electron detachment cross section, differential in both electron momentum and direction, for collisions of 0.5-MeV H- projectiles on He targets. Our calculation, which assumes that the residual H atom is left in the 1s state, employs the usual first Born approximation as well as the closure approximation (in order to sum over all He target final states). Electron correlations within the H- system are treated in detail within the framework of the adiabatic hyperspherical coordinate approximation. In particular, for the first time for this collision process, angular correlations are included. The …

Big Bend National Park Biosphere Reserve: A History Of Scientific Study - Volume I: A Narrative Description Of Scientific Study, John A. Bissonette, John W. Ault Iii

Wildland Resources Faculty Publications

In 1971 the United Nations Educational, Scientific, and Cultural Organization (UNESCO) created the Man and the Biosphere (MAB) Program for the purpose of promoting rational use of the earth's resources. Formal involvement by the U.S. began in 1974. By 1976, 28 biosphere reserves had been selected in the U.S., including Big Bend National Park (BBNP) (Fig. 1). The purpose of this 2-volume report was to provide an interdisciplinary reference volume of literature citations for BBNP and the surrounding Chihuahuan Desert, and to provide a synopsis of research completed at BBNP.

Ua66/10/2 Newsletter, Wku Mathematics

WKU Administration Documents

Newsletter created by and about the WKU Mathematics department.

Remarks On Bellman's Structural Identifiability, Jerome Eisenfeld

Mathematics Technical Papers

This paper remarks on unidentifiable compartmental systems. Emphasis is placed on detecting properties of the system directly from the compartmental diagram without resort to complicated analysis. New concepts are introduced. One is separability, a condition in which two or more parameters enter the identification equations only as a certain combination thereby preventing their identification. Concepts from linear algebra such as span, basis, and dimension are adopted to "parameter spaces". A necessary and sufficient condition for interval identification is presented.

Rapid Approximation Of The Energy States Of Three-Electron Systems, Donald Greenspan

Mathematics Technical Papers

In this paper, we show how to approximate rapidly the energy states of systems with one electron in the second ring. Using known energy states and average radii of two-electron systems in ground state, the Method requires only the computer solution of a single nonlinear equation in one unknown. This can always be accomplished by Newton's method when applied with a correct initial guess. Computational results for [see pdf for notation] are compared with available quantum mechanical estimates.

Geology And Structure Of Kodachrome Basin State Reserve And Vicinity, Kane And Garfield Counties, Utah, Dwight Hornbacher

Loma Linda University Electronic Theses, Dissertations & Projects

In my efforts to discover source, time, and mechanism of formation of the clastic pipes and dikes found in the region of Kodachrome Basin State Reserve, I found it necessary to understand the depositional environments of the different members and formations within the study area. Mapping and study of the rock units of the Carmel, Entrada, Henrieville, and Tropic-Dakota formations and subsequent comparison with the interpretation of the depositional environments by others working in the same formations in the surrounding region suggest the following history.

The parallel-laminated, siliciclastic sediments and limestones of the Paria River Member of the Carmel Formation …

Late-Quaternary Vegetational History At Jackson Pond Larue County, Kentucky, Gary R. Wilkins

Masters Theses

A 6.2 meter core of lacustrine sediment from Jackson Pond, Larue County, Kentucky represents the first continuous sequence from Kentucky permitting the vegetational reconstruction for the full-glacial through late-Holocene intervals. Jackson Pond is a spring-fed pond situated within a karst-collapse basin underlain by Ste. Genevieve and St. Louis limestone of Mississippian age. The site is located at 37°27'N, 85°30'W, 190 km south of the full-glacial limit of the Laurentide Ice Sheet. Six sediment samples submitted for radiocarbon analysis provide an absolute chronology for the site for the last 20,460 years.

From 20,460 yr B.P. to 20,330 …

Efficient Parallel Solutions To Some Geometric Problems, Mikhail J. Atallah, Michael T. Goodrich

Department of Computer Science Technical Reports

No abstract provided.

Marketing Programs And Strategies, J. Kenneth Evans

Kentucky Alfalfa and Stored Forage Conference

Hay has never been widely perceived as a cash crop, therefore, it has historically accounted for a very small part of the total cash sales by farmers. It has been estimated that more than 90% of all hay baled in the state is retained on the producing farms. Most of that which is sold is transported very short distances and of course if one farmer in a community has a good hay year, all do. Organized marketing efforts have been minimal in both scope and successes. In 1978, efforts were initiated toward a more organized system of marketing Kentucky hay. …

The Economics Of Stand Life In The Production Of Alfalfa, W. Donald Shurley

Kentucky Alfalfa and Stored Forage Conference

Alfalfa is a crop which once established, can provide production of hay for several years thereafter. The productive years of the established crop are often referred to as the stand life. The life of an alfalfa stand is variable depending on many factors including variety grown, soil, weather conditions during the production period, insect and weed pressures, and of course the management skills of the producer in timely harvesting and other production jobs.

Alfalfa In Livestock Feeding Programs, Gary T. Lane

Kentucky Alfalfa and Stored Forage Conference

A magazine article entitled "Bidders Paid More For Quality at Wisconsin Hay Auction" caught my attention. Did they really pay more money for higher quality. I could not help but think of some hay sales which I have witnessed. One dollar per bale, large bales, small round bales, sixty dollars per ton, and $275 per ton are all some quotes I have heard recently in connection with hay purchases. Not much is said about quality. We may hear relative terms such as good, not much grass, cut early, not rained on or others but not much about nutrient content or …

Grazing Alfalfa, Charles T. Dougherty

Kentucky Alfalfa and Stored Forage Conference

Alfalfa (Medicaao sativa) is a native of an area south of the Black and Caspian seas and it still grows wild in Iran and eastern Anatolia. Alfalfa was the chosen forage for the fighting horses of ancient armies as long ago as 1800 B.C. when the Kassites conquered Babylon. The spread of alfalfa followed the pathway of armies through the Mediterranean, Europe, and the New World. For ages before man used alfalfa to fuel his fighting animals natural selection processes worked on the evolution of alfalfa and its predecessors. A scenario which would account for the morphology and …

Chemical Preservation Of Alfalfa Hay, Dan O. Riddell

Kentucky Alfalfa and Stored Forage Conference

Kentucky farmers harvest about 3 million tons of hay annually. In order to minimize dry matter losses and quality deterioration, hay should be baled with about 20% moisture. Unfortunately, adequate time required to field-dry hay to 20% moisture is often not available due to weather conditions. This is especially true for the first cutting of alfalfa in the spring. Many farmers are forced to choose between letting cut hay get rained on or baling hay wetter than is recommended. Hay baled with more than 20-25% moisture generally becomes moldy and undergoes a heating process which makes part of the protein …

Biological Control Of Alfalfa Insect Pests, Chris M. Christensen

Kentucky Alfalfa and Stored Forage Conference

Alfalfa is a succulent plant that obviously is good feed for large herbivores such as cattle and horses. Therefore, it should not be surprising that a large number of small herbivores such as insects also find this plant delicious. Fortunately, most of these insects are not major pests. However, we do have a couple pest insects that annually attack this valuable crop and often cause economic damage.

Controlling insect pests is expensive and time consuming. However, not controlling them can be disastrous to the profit margin of the alfalfa producer. Entomologists who work on the insect pests of alfalfa have …

Weed Control In Alfalfa — Present & Future, Charles H. Slack

Kentucky Alfalfa and Stored Forage Conference

To achieve maximum alfalfa production and maintain excellent stands and forage quality for a number of years, producers need to start including weed control in their management program. Unfortunately good stands are not being established because of early weed competition where herbicides are not used. Alfalfa stands tend to play out before achieving their maximum number of years of production unless maintenance herbicides are used. Fortunately there are now herbicides registered to meet most every phase of alfalfa production.

This paper will deal primarily with the herbicides that are currently labeled for use on alfalfa. Several herbicides that are not …

Fertilizing Alfalfa For Optimum Production, Lloyd W. Murdock

Kentucky Alfalfa and Stored Forage Conference

Alfalfa is a high producing crop. Therefore, it only makes sense not to limit its production or longevity by establishing it on unsuitable soil and by the use of unsound fertility practices. It is the aim of this paper to propose practices which will not limit the production of alfalfa, but, also allow it to be done as efficiently as possible with only the necessary inputs.

No-Till Alfalfa — Research And Observations, Garry D. Lacefield

Kentucky Alfalfa and Stored Forage Conference

In previous addresses to this Conference, I have suggested four basic goals be included in your alfalfa program: 1) attention to details prior to and during establishment such that you establish a thick, weed-free stand; necessary management to; 2) keep the stand productive for five years; 3) produce five tons per acre per year, and; 4) market your harvest product either as a cash crop or through your livestock program for profit. In the presentations to follow today, information will be presented which, if adapted to your program, will permit you to reach and surpass the above goals.

The topic …

Kentucky's Soils Potential For Alfalfa Production, Kenneth L. Wells

Kentucky Alfalfa and Stored Forage Conference

A description of Kentucky's land base indicates that of nearly 15 million acres suitable for cropland usage, approximately three-fourths has an erosion hazard potential of some degree, relating largely to steepness of slope (1). For this reason, there is a large potential acreage of alfalfa and other perennial forage crops relating to their sod forming growth habit which provides them an inherent value in erosion control.