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Articles 31501 - 31530 of 35942
Full-Text Articles in Entire DC Network
Bionomics Of Mallophaga Of Sharp-Tailed Grouse In South Dakota, Major L. Boddicker
Bionomics Of Mallophaga Of Sharp-Tailed Grouse In South Dakota, Major L. Boddicker
Electronic Theses and Dissertations
The ecologies of chewing lice (Insecta:Mallophaga) which parasitize sharp-tailed grouse, Pedioecetes phasianellus, were studied in southwestern South Dakota from 1964 to 1967. Five hundred twenty-eight hens, cocks and chicks were collected and examined for louse damage. Louse populations were monitored each month from December, 1964, to September, 1967. Five louse species which infested grouse in the study area were Goniodes nebraskensis Carriker, Amyrsidea megalosoma Overgaard, Lagopoecus perplexus Kellogg and Chapman, Goniocotes chrysocephalus and Lipeurus maculosis Clay. Goniodes nebraskensis fed on feather parts and skin debris and was found to have seasonally fluctuating populations. Cocks carried peak populations of 250 lice/host …
The Role Of Rainfall Impact And Surface Flow In Soil Detachment And Transport, Robert Alan Young
The Role Of Rainfall Impact And Surface Flow In Soil Detachment And Transport, Robert Alan Young
Electronic Theses and Dissertations
Soil erosion caused by rainfall is a very complex physical process. To evaluate the mechanism of erosion so that an assessment can be made of the extent to which it may be controlled necessarily begins with an understanding of the basic fundamental factors involved. The purpose of this study involves the development of an insight of the relative importance of the roles played by various contributors to the erosion process. Particular emphasis is placed on the contribution of rainfall detached soil to total soil loss. Three soil types, Barnes loam, Crofton silt loam and Central sandy loam, were prepared with …
A Simulation Of Sediment Deposit In Open Channels, Tsan-Wen Wang
A Simulation Of Sediment Deposit In Open Channels, Tsan-Wen Wang
Electronic Theses and Dissertations
In this study, two mathematical models have been developed to simulate sediment deposition in open-channel flow; a model based on three characteristic equations and a model based on two characteristic equations. A set of three partial differential equations for one dimensional transient flow with homogeneous density was provided to explain the mechanics of the phenomenon. By the method of characteristics, three partial differential equations were transformed into a set of three ordinary differential equations or a set of two ordinary differential equations by simplification in which the change of sediment layer thickness with respect to distance was assumed to be …
Analysis Of Variation Of River Flow And Water Quality In The White River Basin, Michael Stephen Thompson
Analysis Of Variation Of River Flow And Water Quality In The White River Basin, Michael Stephen Thompson
Electronic Theses and Dissertations
The main objectives of this White River Basin study were to analyze flow variation records, to investigate existing river water quality data as compared with the designated beneficial uses for the basin and to consider the influence of present and future irrigation development. Data were collected from a number of sources and brought together for interpretation with respect to these objectives. The streamflow study utilizes the streamflow records from 10 gaging stations in the White River Basin. It is expected that the results of this investigation may be of assistance to the South Dakota Water Resources Commission and the South …
Physiological Regulation Of Cyclic Flowering In Flax, Aurora Salazar Hovland
Physiological Regulation Of Cyclic Flowering In Flax, Aurora Salazar Hovland
Electronic Theses and Dissertations
The flowering pattern of flax (Linum usitatissimum, L.) is cyclic in nature with periods of blossoming separated by periods of rest. To study the regulation of flowering cycles, four experiments were conducted. The first two dealt with nutritional aspects of cyclic flowering by imposing environmental stresses which conceivably might regulate flowering pattern nutritionally. The third and fourth experiments dealt with regulation from hormonal systems and included in vitro regulation of bud growth by growth regulators as well as characterization of endogenous hormonal systems by fluorimetry and bioassays. In the first experiment, the effects of light intensity, temperature, nitrogen and defoliation …
The Effects Of Chlorpropamide In Diets Of Gravid Gilts On Embryo Survival, Fetal Weight And Fetal And Dam Blood Sugar Levels, Duane E. Wachholz
The Effects Of Chlorpropamide In Diets Of Gravid Gilts On Embryo Survival, Fetal Weight And Fetal And Dam Blood Sugar Levels, Duane E. Wachholz
Electronic Theses and Dissertations
Seventy-six primiparous, crossbred gilts averaging approximately 125 to 135 kg were used in a series of two experiments to determine the effects of chlorpropamide upon reproductive and blood criteria. The drug, fed at the rate of 1000 ppm (1816 mg per day) and 3000 ppm (5448 mg per day), was included in a 14% protein basal diet from the day following breeding until gilts were sacrificed after 60 or 95 days of gestation. The 515 fetuses collected from these gilts were used to obtain information about the effects of chlorpropamide on individual weights and blood glucose and fructose levels. Data …
A Study Of Selected Demographic Factors Associated With Changes In Age Structure In The Population Of South Dakota From 1960-1970, Robert Todd Wagner
A Study Of Selected Demographic Factors Associated With Changes In Age Structure In The Population Of South Dakota From 1960-1970, Robert Todd Wagner
Electronic Theses and Dissertations
A study of the population profile for South Dakota for 1960 and 1970 was made to determine: (1) the changes that transpired in the composition 0£ the population for the age categories 0-4, 0-14, 15-34, 35-64, 65+ and 75+; (2) the variation in the changes observed in the selected age categories when controlled according to residence, sex and race differentials; and (3) the extent to which changes in the basic demographic components of migration, fertility and mortality are associated with changes in the age interval 0-4. Each county in South Dakota was employed as the unit of analysis, and census …
Major Themes In The Novels Of Kurt Vonnegut, Jr., June A. Anderson
Major Themes In The Novels Of Kurt Vonnegut, Jr., June A. Anderson
Electronic Theses and Dissertations
Kurt Vonnegut, Jr. has written six novels which explore some of the most important problems confronting man in contemporary society. Little significant criticism has been written on Kurt Vonnegut since he began writing in 1949. Recently, however, he has experienced an increasing popularity with readers and critics who have found his novels successful probings into modern man’s feelings of alienation in a world which he perceives as increasingly absurd. This thesis is an analysis of Kurt Vonnegut’s use of black humor, satire and science fiction devices in his exploration of four major themes occurring throughout his novels: criticisms of science, …
Carlyle's Literature Of Heroism And Its Contemporary Model--Mao, Kang-I Eleanor Chang
Carlyle's Literature Of Heroism And Its Contemporary Model--Mao, Kang-I Eleanor Chang
Electronic Theses and Dissertations
Today when millions of Chinese people are shouting, "Long Live Chairman Mao” and waving their red books with flaming, uncontrollable enthusiasm, one wonders whether the worship is genuine, and whether this is the kind of worship which Carlyle means. However, the main emphasis of this thesis is on Carlyle's concept of heroism. Carlyle was greatly obsessed with the heroic ideal. After he was disappointed with the lack of modern heroes in America, he longed for a heroic nation to admire. Thus Carlyle, after a long pilgrimage became the good friend of Germany and the worshiper of German great men. He …
The Distribution Of Primitive Roots In Fields Of Order P², Marilyn Sol Gerjets
The Distribution Of Primitive Roots In Fields Of Order P², Marilyn Sol Gerjets
Electronic Theses and Dissertations
Throughout this paper, small case Latin letters, with the exception of i which has its usual mathematical meaning, will denote rational integers where we let Z represent the set of all rational integers. We call µ = a + bi a Gaussian integer iff a and b are rational integers and we denote the set of all Gaussian integers by Z(i). The set of Gaussian integers can be represented geometrically by ·the set of lattice points in a Cartesian coordinate system whose horizontal and vertical grid lines are one unit apart. Since µ = a + bi is a complex …
An Experimental Study Of No-Screen Bump Exposures For Short Density Range Reflection Copy, Stephen E. Horwood
An Experimental Study Of No-Screen Bump Exposures For Short Density Range Reflection Copy, Stephen E. Horwood
Electronic Theses and Dissertations
The purpose of this thesis, therefore, is to investigate a system of no-screen bump or highlight exposure (so-called because it is the highlight area of the negative that is affected) based on logarithmic densities and opacity tables. The system under investigation used in shooting the copy. R. E. Maurer says that 11 a contact screen is a light modulator that is placed in contact with the halftone emulsion. The small, vignetted dots in the photographic screen absorb the exposing light selectively so that the proper intensity distribution is produced in the halftone emulsion." The second exposure is the flash, which …
Pheasant Production Using Wild Cocks And Penned Game-Farm Hens, Michael R. Grode
Pheasant Production Using Wild Cocks And Penned Game-Farm Hens, Michael R. Grode
Electronic Theses and Dissertations
Pheasant production using free-flying wild cooks and penned game-farm hens was evaluated during 1971. Hens were placed in 0.5-acre pens to compare production at density levels of 10, 20, and 40 hens per acre. Wild cooks entered the 0.5-acre pens the day following introduction of the game-farm hens. The greatest numbers of cooks were observed in the pens with the highest density of hens. Censusing in mid-March indicated a population of 12 to 15 wild cooks in the vicinity of the study pens. A known mortality of 31 hens occurred and percentage mortality was similar at each density level. Pulling …
Factors Influencing Irregular Compaction Curves, Ching- Yee Hsu
Factors Influencing Irregular Compaction Curves, Ching- Yee Hsu
Electronic Theses and Dissertations
The important influences of temperature on the compaction curves has been given little consideration, A.W. Johnson and J. K. Jallberg summarized primarily from a search of the literature that increasing the temperature leads to increase the maximum dry density 0£ the single peak curve. They explained that the water in the soil is more viscous at the lower temperature, reducing the workability of the soil, which induces a lower dry density. Some investigations which were not involved· in the compaction tests, have shown the temperature effect on some soil properties. From the results of confined and undrained compression test, M. …
Finite Element Analysis By Structure Iteration, Richard William Macek
Finite Element Analysis By Structure Iteration, Richard William Macek
Electronic Theses and Dissertations
A new approach in the application of 'the Finite Element Method to determine the stress distribution in stress concentration zones has been proposed and investigated. This approach uses the forces on the elements relatively far removed from the concentration zone to obtain the stresses near the zone by an iterative procedure, "Iterative Shrink1ng." For certain geometries applicable to high concentration zones, i.e. singularities in the stress field, it was shown that the basic equation of "Iterative Shrinking" reduces to simply the remultiplying of the starting matrices. In this case, termed "Conformal Shrinking," the computational effort reduces considerably. The problem of …
Implications Of The Uropygial Gland And Skin In The Excretion Of Insecticides From Birds, Gary Edmond Northwall
Implications Of The Uropygial Gland And Skin In The Excretion Of Insecticides From Birds, Gary Edmond Northwall
Electronic Theses and Dissertations
Dieldrin-14c was administered to chickens, ducks, and cormorants to determine: (1) the accumulation and excretion of dieldrin, (2) the importance of the uropygial gland as an organ of excretion of the insecticide. Analysis of all samples was by liquid scintillation counting (14c-analysis). Samples of whole body, uropygial glands, and feathers were taken for analysis. In addition, eggs from chickens, feces from ducks and cormorants, and ectoparasites from cormorants were analyzed. Modes of excretion included eggs, feces, uropygial glands, and skin. Chickens, ducks, and cormorants with uropygial glands averaged 3.2, 6.3, and 1.8 times more radioactivity per gram, respectively on their …
The Effects Of A Collegiate Wrestling Season On Selected Physiological Measurements, James W. Riesselman
The Effects Of A Collegiate Wrestling Season On Selected Physiological Measurements, James W. Riesselman
Electronic Theses and Dissertations
Coaches of wrestling have long been interested in the physiological changes which occur in a wrestler during a competitive season. This concern has been stimulated by the controversy over the effects of weight reduction among wrestlers prior to and during a season of competition. The practice of weight reduction has prompted research that follows wrestlers through the competitive season. Although studies have been completed centering around changes in muscular strength in relation to body weight loss, few have been conducted studying the cardiovascular changes which occur during a season of competitive wrestling. A search of the literature indicated that the …
Serological, Chemical, And Morphological Comparison Of Four Epizootic Hemorrhagic Disease Virus Strains, Barbara J. Schroeder
Serological, Chemical, And Morphological Comparison Of Four Epizootic Hemorrhagic Disease Virus Strains, Barbara J. Schroeder
Electronic Theses and Dissertations
South Dakota 10 (SD 10) virus strain of epizootic, hemorrhagic disease (EHD). of deer has not been compared chemically and morphologically to the reference strain of EHD, New Jersey, .and other strains. In addition, the question has arisen if EHD viruses may be the same viruses as the bluetongue viruses found in sheep and cattle. Therefore, an investigation was undertaken to characterize SD 10 virus in comparison to other EHD virus strains with Bluetongue 262, Reovirus 3, Infectious Bovine Rhinotracheitus virus, and Enteric Cytopathic Bovine Orphan virus as control viruses. All viruses used in this study were adapted to African …
The Effect Of Range Condition And Season Of Grazing On The Amount And Quality Of The Diet Selected By Grazing Steers, David W. Rodgers
The Effect Of Range Condition And Season Of Grazing On The Amount And Quality Of The Diet Selected By Grazing Steers, David W. Rodgers
Electronic Theses and Dissertations
Adequate knowledge of the nutrition of grazing animals depends on accurate measurement of both intake and nutritional value of the forage being consumed. Cattle grazing native grasslands select their diet from a variety of plants which are continually changing in palatability, digestibility and chemical composition. The result of these changes may be inadequate nutrition for optimum animal production on a sustained basis. As forages mature, overgrazing occurs or with the onset of drought the incidence of inadequate nutrition of range livestock increases. Many workers agree that sampling from the esophageal fistula is the best method of evaluating the nutritional value …
Use Of Eelctrophoresis To Determine Populations Of Pheasants In South Dakota, David George Montag
Use Of Eelctrophoresis To Determine Populations Of Pheasants In South Dakota, David George Montag
Electronic Theses and Dissertations
The ring-necked pheasant (Phasianus colchicus) is an important game bird, and various management techniques have been implemented in its behalf. One of the most common practices has been transplanting or stocking wherein pheasants are introduced into an area with a depleted population in hopes of increasing pheasant production. The effects of such programs are difficult to evaluate since there is no way of knowing if the introduced birds are in any way responsible for production changes which subsequently occur. If the taxonomic characteristics of the native and the introduced populations could be determined, the effect that introduced birds have on …
Effects Of Diethylstilbestrol On Reproduction In The Black-Tailed Prairie Dog, Donald G. Pfeiffer
Effects Of Diethylstilbestrol On Reproduction In The Black-Tailed Prairie Dog, Donald G. Pfeiffer
Electronic Theses and Dissertations
Research was conducted in southwestern South Dakota in 1970 and 1971 to obtain information on the reproductive cycle of the black-tailed prairie dog (Cynomys ludovicianus) and to test effectiveness of diethylstilbestrol as a reproductive inhibitor. Embryo body lengths from 10 pregnant females were compared to body lengths of 14 known day-old young to learn the peak breeding period when an estrogenic chemosterilant would be most effective. Conception dates were obtained for three females by backdating the gestation period. The breeding peak was found to occur in late February and early March in South Dakota. Nine of 11 Prairie dogs were …
The Ontology Of Jean-Paul Sartre, James Ronald Lefler
The Ontology Of Jean-Paul Sartre, James Ronald Lefler
Electronic Theses and Dissertations
No abstract provided.
A Study Of Racial Socialization In Black Families In Oxford, Mississippi, Ella Tates Keller
A Study Of Racial Socialization In Black Families In Oxford, Mississippi, Ella Tates Keller
Electronic Theses and Dissertations
No abstract provided.
A Description Of The Use Of The Preposition E, Ex In Horace, Ovid, Propertius, Tibullus, And Vergil With A Concordance Of The Preposition For Each Author, Beatrice Mae Langston
A Description Of The Use Of The Preposition E, Ex In Horace, Ovid, Propertius, Tibullus, And Vergil With A Concordance Of The Preposition For Each Author, Beatrice Mae Langston
Electronic Theses and Dissertations
No abstract provided.
Dimensions Of Professionalism : Nurses In A Vocational Education Setting As Compared To Other Vocational-Technical Teachers / By Marvin Lanier Sanders, Marvin Lanier Sanders
Dimensions Of Professionalism : Nurses In A Vocational Education Setting As Compared To Other Vocational-Technical Teachers / By Marvin Lanier Sanders, Marvin Lanier Sanders
Electronic Theses and Dissertations
No abstract provided.
Car Following On A Single Lane No-Passing Highway, Jen De Hsu
Car Following On A Single Lane No-Passing Highway, Jen De Hsu
Electronic Theses and Dissertations
No abstract provided.
The Laplace Transform And Its Role In Borel Summability / By Julia Gaylon Stuart, Julia Gaylon Stuart
The Laplace Transform And Its Role In Borel Summability / By Julia Gaylon Stuart, Julia Gaylon Stuart
Electronic Theses and Dissertations
No abstract provided.
The Tragic Role Of Caddy Compson In The Sound And The Fury / By Daney Daniel Staub, Daney Daniel Staub
The Tragic Role Of Caddy Compson In The Sound And The Fury / By Daney Daniel Staub, Daney Daniel Staub
Electronic Theses and Dissertations
No abstract provided.
Economic Feasibility Of Crawfish Culture In Northern Mississippi/ By Seth Berry Stalcup, Seth Berry Stalcup
Economic Feasibility Of Crawfish Culture In Northern Mississippi/ By Seth Berry Stalcup, Seth Berry Stalcup
Electronic Theses and Dissertations
No abstract provided.
A Study Of Chemotaxis In Physarum Polycephalum Schw., Linda Sue Donnelly
A Study Of Chemotaxis In Physarum Polycephalum Schw., Linda Sue Donnelly
Electronic Theses and Dissertations
No abstract provided.
Federal Intervention To Control Violence In Reconstructed Mississippi 1871-1874, Roger Donald Brown
Federal Intervention To Control Violence In Reconstructed Mississippi 1871-1874, Roger Donald Brown
Electronic Theses and Dissertations
No abstract provided.