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The Effect Of Cyclic Differential Stress On Dilatancy In Westerly Granite Under Uniaxial And Triaxial Conditions, Mark D. Zoback, James D. Byerlee

United States Geological Survey: Staff Publications

Laboratory experiments have been performed on samples of Westerly granite in which the differential stress was repeatedly cycled to 85% of the intact sample strength. The experiments have shown that under uniaxial conditions the onset of dilatancy is reduced to fairly low stress; however, under triaxial conditions dilatancy can be an apparently stable process, and the onset of dilatancy is not affected by the repeated cycling. Thus the implication for midcrustal earthquakes is that the onset of dilatancy repeatedly occurs at relatively high stress levels. For example, our results indicate that at typical focal depths of 2.5 and 10 km …

Pilogalumna Cozadensis, A New Species Of Galumnid From Nebraska, U.S.A., F. Reese Nevin

Harold W. Manter Laboratory of Parasitology: Faculty Publications

In working with the galumnids in my collection of oribatid mites I found that a number of specimens from Nebraska showed several characteristics which differentiated them from other species of pilogalumnids. The description and drawings of the new species is based upon a study of these specimens.

Taxonomy And Zoogeography Of Lemmus Spp. (Rodentia: Arvicolinae), With Notes On Laboratory-Reared Lemmings, Robert L. Rausch, Virginia R. Rausch

Harold W. Manter Laboratory of Parasitology: Faculty Publications

Lemmings of the genus Lemmus Link, 1795, have long attracted interest because of the high numerical densities attained at intervals by their populations. In earlier times, in northern Europe, such events seemed so remarkable as to be explained by some as a consequence of the animals' having fallen from the sky (HaGSTROM 1749). During the last 25 years, lemmings have been the object of intensive ecological investigation in Eurasia and North America, although there has been no consensus concerning their taxonomic relationships. In 1959, a colony of brown lemmings from arctic Alaska was established in our laboratory, primarily to provide …

Marine Leeches Of The Eastern United States And The Gulf Of Mexico With A Key To The Species, Roy T. Sawyer, Adrian R. Lawler, Robin M. Overstreet

Harold W. Manter Laboratory of Parasitology: Faculty Publications

Unlike the Eurasian marine leeches (Johansson, 1896; Selensky, 1915; Herter, 1935; Vasileyev, 1939; Knight-Jones, 1961; Sawyer, 1970; Soós, 1965), those from North America comprise an unusually neglected group, due primarily to the bewildering taxonomy of the members. Most early descriptions were brief, ambiguous, and concerned only with superficial characters. Some of the nominal species reported from the eastern United States and Canada are unrecognizable today, thus perpetuating nomenclatural confusion.

We attempt to analyze critically the marine leeches from Newfoundland to Texas, with emphasis on those of the southern states from Virginia to Mississippi. An illustrated dichotomous key and a diagnosis …

Urban Geology Of Madison County, Indiana: Special Report 10, William J. Wayne

Department of Earth and Atmospheric Sciences: Faculty Publications

During recent years many of the population centers of Indiana have undergone growth that has resulted in expansion of urban uses into land that has been largely rural. As a result of that expansion, conflicts have arisen between expanding urban uses and the agricultural and mineral resource uses of land that lies near the centers of population. In addition, uncontrolled use of flood plains, steep slopes, and areas of soft sediments and high water tables has caused inconvenience and financial loss to individuals and industries that unknowingly have built structures in those places. Generally, these situations have developed as a …

Federal And State Regulations Pertaining To Systematic Collections. I. A Case Of Inadvertent Violation Of Federal Regulations, Jerry R. Choate, Hugh H. Genoways

University of Nebraska State Museum: Mammalogy Papers

On 25 April 1975, at the twenty-second annual meeting of the Southwestern Association of Naturalists (SWAN), at the University of Oklahoma Biological Station, President Keith A. Arnold appointed Jerry Choate to investigate current regulations pertaining to collection and transport of scientific specimens in the region of representation (including Mexico) or SWAN. This charge involves both Federal and State laws, several of which are undergoing change and many of which doubtlessly are not familiar to the membership of SWAN. In order that SWAN members might be made aware of these regulations and not unwittingly commit violations, it was decided that SWANEWS …

Meet Your Earthwatching Task Force, Jay Fussell

Conservation and Survey Division: Faculty and Staff Publications

No abstract provided.

Remote Sensing, Rex Peterson

Conservation and Survey Division: Faculty and Staff Publications

No abstract provided.

Pitch Of Voiced And Whispered Vowels, R. E. Mcglone, W. H. Manning

Department of Communication Studies: Faculty Publications

No abstract provided.

Dependence Of The Electronic Transition Moment On Internuclear Separation In Na2: A Quantum Mechanical Treatment, P. F. Williams, D. L. Rousseau

P. F. (Paul Frazer) Williams Publications

We present a quantum mechanical treatment of laser-induced atomic fluorescence from molecular sodium. It is shown that such fluorescence data may be analyzed with an ν-centroid approximation and an accurate determination of the electronic transition moment may be made.

Discrete And Diffuse Emission Following Two-Photon Excitation Of The E State In Molecular Iodine, D. L. Rousseau, P. F. Williams

P. F. (Paul Frazer) Williams Publications

We studied the fluorescence spectrum of E →B transitions in molecular iodine following two-photon absorption. Discrete re-emission lines terminating in B-state levels ranging from ν = 0 to the dissociation limit were observed in addition to a series of broad diffuse lines. These diffuse lines represent the first observation of Condon "internal diffraction” resulting from a single vibronic state, and therefore the variation of the bands directly displays the variation of the Franck-Condon factor.

Adult Education Aspects Of A Program Of A State Government, Kent K. Murray

Department of Agricultural Leadership, Education, and Communication: Dissertations, Theses, and Student Research

With the passage of LB-722 in 1959, the State of Nebraska embarked on one of the most extensive and challenging adult education programs of the past decade. LB-722 established the Nebraska Agricultural Products Industrial Utilization Research Program (Nebraska Program) which in the course of its ambitious life undertook the re-education, first of Nebraska's production-oriented agricultural citizens, and then of other agricultural states and the Federal Government. Seen as an adult education program, the Nebraska Program clearly represented the kind of "enlargement of the definition of the clientele of adult education" proposed by Malcolm Knowles. This was adult education moving "away …

The Climate Of The Great American Desert: Reconstruction Of The Climate Of Western Interior United States, 1800-1850, Merlin Paul Lawson

University Studies (University of Nebraska) (1888–1984)

Historians have concluded that two conceptions of the West were held during the incipient stages of settlement of the plains region of the Western Interior (sensu latu). They have labeled these conceptions the "myth of the desert," supposedly prevalent during the first half of the nineteenth century,l and the "myth of the garden," a notion widely held during the latter decades of that century.

It has been assumed by students of the American frontier that the former-in its extreme form the concept of the Great American Desert-was derived from the notions of a few men rather than from the probable …

Cetacean Notes. I. Sei And Rorqual Whales On The Mississippi Coast, A Correction. Ii. A Dwarf Sperm Whale In Mississippi Sound And Its Helminth Parasites, Gordon Gunter, Robin M. Overstreet

Harold W. Manter Laboratory of Parasitology: Faculty Publications

I. Gunter and Christmas (1973) described the events leading to the stranding of a baleen whale on Ship Island, Mississippi, in 1968, giving the species as Balaenopteru physalus, the Rorqual. Unfortunately the identification was in error, but fortunately good photographs were shown. The underside of the tail was a splotched white, but there was no black margin. The specimen also had fewer throat and belly grooves than the Rorqual, as a comparison with True’s (1904) photograph shows. Dr. James Mead (in litt.) pointed out that the animal was a Sei Whale, Balaenoptera borealis. This remains a …

A Possible Function Of The Fibrillar Coat In Acanthocephalus Jacksoni Eggs, David F. Oetinger, Brent B. Nickol

Harold W. Manter Laboratory of Parasitology: Faculty Publications

Discusses a possible function of the fibrillar coat in Acanthocephalus jacksoni eggs.

The Prairie Naturalist Volume 6, Nos. 3 And 4. September-December 1974

The Prairie Naturalist

A BIOLOGICAL SURVEY OF KRAFT SLOUGH ▪ G. L. Krapu & H. F. Duebbert

CHRISTMAS BIRD·COUNTS FOR NORTH DAKOTA - 1974 ▪ R. N. Randall

USE OF SMALL FENCES TO PROTECT GROUND BIRD NESTS FROM MAMMALIAN PREDATORS ▪ A. B. Sargeant & A. D. Kruse

BOOK REVIEW: Finding Birds in Minnesota ▪ E. M. Welter

Whole Issue Nebraska Bird Review (December 1974) 42(4)

Nebraska Bird Review

Table of Contents

1974 (Forty-ninth) Spring Migration and Occurrence Report ..................66

Notes ..................76

Index of Volume XXXXII ..................82

An Estuarine Low Temperature Fish Kill In Mississippi, With Remarks On Restricted Necropsies, Robin M. Overstreet

Harold W. Manter Laboratory of Parasitology: Faculty Publications

In January 1973, large numbers of Mugil cephalus (striped mullet), weighing approximately 250 gm each, died in two freshwater localities in tidewater bayous of Jackson County, Mississippi. Fish identified as Mugil curema, M. cephalus, Megalops atlantica, Dormitator maculatus, and Fundulus grandis were found dead in other low saline estuarine areas. Fish-kills during cold periods are less commonly encountered in Mississippi than in Texas or Florida. This particular incident is attributed to conditions of stress for fishes incompletely acclimated to the encountered low temperatures. The most deleterious stress was the low saline water which probably allowed a breakdown in the …

Propositional And Nonpropositional Perceiving, Dan D. Crawford

Department of Philosophy: Faculty Publications

The general theory of perception proposed by Roderick Chisholm in his book Perceiving: A Philosophical Study¹ has gained considerable acceptance among contemporary philosophers of perception. In this paper, I will review and evaluate one part of this theory and show where I believe an important modification is necessary.

Chisholm distinguishes what he thinks are two importantly different senses of “perceive,” a propositional and a nonpropositional sense, and then proposes a definition of each. The propositional sense of “perceive” is expressed in contexts in which what is perceived is referred to by a propositional clause, as in

1. George perceives …

Oer For Mixed Neutrons And Γ Rays, Robert Katz, S. C. Sharma

Robert Katz Publications

A formula for the OER in a mixed field of neutrons and gamma rays (Hall, 1972a; 1972b) is given .... Our results, calculated from track structure theory (Katz and Sharma, 1973) and secondary particle-energy spectra in tissue from these neutrons (Caswell and Coyne, 1973; Dennis, 1972) are within 5 per cent of the values of O_mix found from the Hall formula, when that formula is supplied with calculated values of R_n, O_n, and O_γ, at appropriate survival levels. Our calculations suggest that the Hall formula may be used with confidence for neutrons of …

Agricultural Experiment Station News November 1974

Agricultural Research Division: News and Annual Reports

CONTENTS:
FROM THE DIRECTOR'S DESK
ANIMAL SCIENCE CHAIRMAN
PERSONNEL ACTIONS
GRANTS AND CONTRACTS
GENERAL NOTES
NEBRASKA AGRICULTURAL EXPERIMENT STATION PUBLICATIONS – November 1974
BULLETINS PRINTED

Waterfowl Portraits, Paul A. Johnsgard

Papers in Ornithology

SINCE HIS days as a boy on the North Dakota prairies, Paul A. Johnsgard has "measured his winters, not by conventional time units, but in the days it took for the snow geese to return from their wintering grounds...." The author of five books: Song of the North Wind-A Story of the Snow Goose; Grouse and Quails of North America; Waterfowl- Their Biology and Natural History; Animal Behavior; and Handbook of Waterfowl Behavior, and of numerous articles in national magazines and over 40 technical papers, he is eminently qualified to capture in pen and ink the very essence of Nebraska's …

Water Current, Volume 6, No. 11, November 1974

Water Current Newsletter

Guest Editorial: Earl R. Kendle, Chief, Research Division, Nebraska Game and Parks Commission
Deadline for Research Proposals
NWRRI Hires Research Associate
Underground Water Supplies Remain the Same
Greater Priority Urged for Platte Level B Study
Coming Crisis -- Water Shortage?
EPA Orders Study of Nation's Drinking Water
Water Resources Council to Conduct Project Cost Sharing Study
Corps of Engineers Reviewing Project Deauthorization
Methods for Cleaner Irrigation Runoff
Water Proponents Defend Water Resource Spending
Expo '74 "Tote Board" or Resource Use
ERTS Can Locate Energy Resources and Protect Environment
Research Review: Water Quality Study of Runoff from Agricultural Lands

Review Of Suomen Nisäkkäät [Mammals Of Finland] By L. Siivonen (Otava Publishing Company, 1972), Robert L. Rausch

Harold W. Manter Laboratory of Parasitology: Faculty Publications

Review of Suomen Nisäkkäät [Mammals of Finland] by L. Siivonen (Otava Publishing Company, 1972).

Repeatable Testing-A Tool For Learning Physics, David E. Golden, Robert Fuller, Donald D. Jensen

Robert G. Fuller Publications

Physics courses have traditionally used one-chance-only examinations as a probe to tell the professor how much physics each student has learned, with the result that physics examinations have been a common cause of anxiety among undergraduates.

Repeatable equivalent examinations, on the other hand, offer an alternative testing procedure which underscores material not mastered on the first examination and then allows remedial study of this material for the next examination. Furthermore, the thought that it will be possible to have another try at the examination greatly decreases the anxiety associated with examinations. While repeatable examinations are routinely used in Keller-plan courses, …

Helminths Of Three Species Of Goby (Pisces: Gobiidae) From Mission Bay, San Diego, Daniel R. Brooks, Edward B. Brothers

Harold W. Manter Laboratory of Parasitology: Faculty Publications

From August 1971 to June 1973, 351 gobies representing three species, Ilypnus gilberti (Eigenmann and Eigenmann), Clevelandia ios (Jordan and Gilbert), and Quietula y-cauda (Jenkins and Evermann), were collected by Brooks from Mission Bay, San Diego, California, and examined for helminths. The worms were removed from the organs to saline solution, fixed in 40% isopropyl alcohol or warm AFA, and stored in 70% ethanol. All platyhelminths were stained in Mayer's hematoxylin and mounted in Canada balsam. Nematodes were cleared in glycerine and mounted in glycerine gel. Representative mounts are on deposit with the H. W. Manter Laboratory, Division of Parasitology, …

Second-Order Raman Scattering In Alkali Fluoride Crystals, S. L. Cunningham, T. P. Sharma, Sitaram Jaswal, M. Hass, John R. Hardy

John R. Hardy Papers

We present theoretical and experimental second-order Raman spectra for NaF, KF, RbF, and CsF. The theoretical calculation follows the formalism of Born and Bradburn. For the lattice-dynamic calculation we use the deformation-dipole model and present comparisons with measured dispersion curves. For the polarizability calculation, we retain all eight first-neighbor and all thirty second-neighbor polarizability coefficients. We find that, in addition to all of the first-neighbor coefficients, only three of the second-neighbor coefficients are needed to obtain good agreement between the calculated and observed spectra both as regards peak positions and over-all shape. Comparison with other types of calculations are made.

Deduction Of Asymptotic Steinmann Relations From The Regge Hypothesis, Paul Finkler, C. Edward Jones, M. Misheloff

Paul Finkler Papers

The analytic structure of the double-Regge vertex, which has previously been obtained from the Steinmann relation, is derived by using a natural generalization of the Regge hypothesis.

Opportunity For Farmers, Clayton K. Yeutter

Clayton K. Yeutter, United States Secretary of Agriculture: Papers

I am very pleased to be here in the Missouri Delta, among some of the people who are really making our farming decisions these days. I think one of the most effective economic decisions we have made recently was to turn farmers loose to manage their own farms, and to stop trying to manage them by long-distance from Washington. The wisdom of that decision is on display here in the Missouri Delta.

Results Of The Fourth International Winter Wheat Performance Nursery, J. E. Stroike, V. A. Johnson, J. W. Schmidt, P. J. Mattern, K. D. Wilhelmi

Nebraska Agricultural Experiment Station: Historical Research Bulletins

The Fourth International Winter Wheat Performance Nursery was grown in 1972 at 44 sites in 27 countries. Data were reported from 40 sites. The 30 cultivars grown in the nursery included 15 new entries. Twenty-nine cultivars were winter wheats; one was a spring wheat. Data are reported on grain yield, test weight, plant maturity, plant height, lodging, shattering, winter survival, 1000 kernel weight, frost damage, plant diseases, grain protein and lysine content. Two-year mean data summaries also are reported. Supplemental nursery management information is reported for each nursery site.