Digital Commons Network^™

The Age, Rate Of Growth And Ecological Distribution Of Channel Catfish, Ictalurus Punctatus (Rafinesque), In The Little Missouri Arm Of Lake Sakakawea, North Dakota, Charles Henry Wahtola

Theses and Dissertations

No abstract provided.

Study Of Differences In Selected Personality And Academic Characteristicsof Low Achieving College Males., Mary Christine Scharf

Theses and Dissertations

No abstract provided.

Selected Factors Related To Reported Physical And Mental Disabilities Of North Dakota Residents., Myron Morgan Thomason

Theses and Dissertations

No abstract provided.

An Analysis And Comparison Of Linear Phase Bandpass Filters, Darrell L. Ash

Theses and Dissertations

The ideal bandpass filter is defined as one which uniformly attenuates and delays all frequency components within the passband and effects zero transmission of all components outside the passband. For reasons which will be subsequently discussed, it is impossible to realize a stable lumped-element filter having this ideal characteristic. This has made it necessary to find ways to physically approximate such a characteristic. Some of the more widely used methods will be compared and analyzed in this paper.

An Experimental Investigation Of Proportional Braking, Rudolf Limpert

Theses and Dissertations

In recent years automobile safety has become more and more important.The braking device contributes largely to the problem of safe driving.

Design And Operation Of Equipment For Impact Test Of A Hydraulic Cushion, Harshadbhai R. Patel

Theses and Dissertations

In recent years, experiments have been carried out to evaluate the performance of water-filled cushion cells used to attenuate energy of automobile collisions. The water-filled cushion cell is a vinyl plastic cylinder of 6 inches nominal outside diameter, 1/4 inch wall thickness, 40 inches length, closed at the bottom by a cast-in-place vinyl plug and partially closed by a bolted-in vinyl diaphragm at the upper end. These cells are designed to be installed in the path of a crashing automobile to absorb and dissipate the kinetic energy of impact. Properly designed cushions could be used as one means of saving …

Development Of A Generalized Structural Dynamics Computer Program, Val E. Simmons

Theses and Dissertations

The purpose of this thesis was the development of a generalized structural-dynamics computer program to calculate the response of multi-degree-of-freedom systems. The user of this computer program, having a limited background in matrix algebra and vibrational analysis, can gain numerical and graphical information concerning the dynamic response of multi-degree-of-freedom structures. The user, with a minimal amount of FORTRAN experience, will find this thesis ideally suited for his needs.

The Thermodynamics (Log K, [Delta]H°, [Delta]S°, [Delta]Cp°) Of Metal Ligand Interaction In Aqueous Solution.|Ni.|P Design And Construction Of An Isothermal Titration Calorimeter.|Nii.|Pthe Interaction Of Cyanide Ion With Bivalent Nickel, Zinc, Cadmium And Mercury.|Niii.|Pthe Interaction Of Glycinate Ion With Bivalent Manganese, Iron, Cobalt, Nickel, Copper, Zinc And Cadmium, Harlin Dee Johnston

Theses and Dissertations

A new isothermal titration calorimeter has been designed to facilitate the study of heats of reaction and heats of solution at constant temperature. With this calorimeter, endothermic or exothermic processes can be studied at temperatures constant to ±0.0002°C. Heat effects are compensated by balancing the heat effect of the process taking place in the calorimeter against a variable heat and a constant cooling Peltier device. The calorimeter was tested by measuring the heat of ionization of water and the heat of dilution of aqueous HClO_4 solutions. For these systems heats were measured to an accuracy of ±0.02 calorie. Log K, …

Saftey Glasses In Wyoming Industrial Arts, Wayne E. Simonson

Theses and Dissertations

No abstract provided.

Nesting Ecology And Behavior Of The Golden Eagle In West Central Utah, Franz J. Camenzind

Theses and Dissertations

The Golden Eagle Aquila chrysaetos canadensis Linn. is facing extinction in much of its range. In the Western Hemisphere its numbers are restricted primarily to the mountainous regions west of the 99th meridian, from extreme northern Alaska to northern Mexico (Hobbie and Cade, 1962) and from timberline in Colorado to below sea level in Death Valley, California (Summer, 1929a).

Photography As Used By Artists, James R. Weeks

Theses and Dissertations

This study was undertaken to show the relationship of photography to the fine arts* A brief examination of the development of photography and its use by artists is included. This examination indicates that since the beginning of photography, artists have made use of it in their art.

The study includes photographic processes used by the author in creating works of art. The text is illustrated with thesis projects which support the discussion.

A History Of The Women's Physical Education Department At The University Of North Dakota, Margaret L. Milne

Theses and Dissertations

The purpose of the study was to compile a history of the Women's Physical Education Department at the University of North Dakota. The historical method of research was followed with limited use of the questionnaire technique of research.

The historical method included the collection of data which were grouped into a time and subject sequence. Material x^as criticized and interpreted by accepted historical techniques. This particular method included the treatment of data for cause and effect x-diich permitted the development of patterns for testing of che hypotheses.

A questionnaire x^as developed and sent to select individuals which included former women …

History Of Fort Pembina 1870-1895, William D. Thomson

Theses and Dissertations

The unsettled status of the Red River Valley during the 1860's made inevitable the establishment of a military post near the 49^th Parallel. The Minnesota Uprising in 1862 caused a band of Sioux Indians, responsible for the massacre, to flee to Canada to escape punishment by the military. In 1863, a hastily organized battalion established a temporary fort at Pembina to capture the renegades. After accomplishing its mission, the battalion abandoned the post in 1864.

With the end of the Civil War, people looked to the frontier for fertile lands to settle; but the Indian threat kept them out …

Structure And Light: Recent Developments In Contemporary Art, William Landwehr

Theses and Dissertations

This thesis is an introduction to a recent development in the visual arts . The art of light and structure and its inherent implications have so thoroughly captured the imagination of a new generation of artists that it is rapidly becoming the major artistic force of our century.

The thesis concentrates on the background, the theory, and some of the implications of these developments. It is highly biased and to the fullest extent concerns itself with the personal orientation I have committed myself to in the creation of my own art. It involves itself with discussions of my aesthetic philosophy …

The Role Of Management Consulting: Its Present And Future Use In Business Decision-Making, Joseph Mitchell

Theses and Dissertations

No abstract provided.

The Position Of The Female Secretary In The United States From 1900 Through 1967: An Historical Study, Elizabeth Shaughnessy Oelrich

Theses and Dissertations

The problem was to trace the development of the position of the female secretary in business in the United States from 1900 to 1967. The paper was divided into five sections; namely, origins of the secretarial position; the secretarial position, 1900-1920; the secretarial position, 1920-1940; the secretarial position, 1940-1967; and secretarial specialties.

The historical research method was used to compile data for each section in relation to descriptions of the position, education and experience required, extensiveness of the position, salary, professionalism, and the effect of two wars, a depression, automation, and specialization.

The bona fide secretarial position has not basically …

Sample Preparation And Electron Microprobe Analysis Of Lignite And Deposits, Thomas D. Wilhelm

Theses and Dissertations

A suitable technique for preparation of lignite ash deposits for electron microprobe analyses was developed. Six samples were prepared and systematically analyzed on the microprobe for chemical concentrations and distribution relationships at four separate positions on the tube deposit. The six samples were collected on air cooled tubes placed in the combustion gas stream during combustion of four high sodium lignites and two low sodium lignites in the Bureau of Mines pilot plant combustor.

Sodium-sulfur compounds were found in a layer completely surrounding the tube. The thickness of this layer was reduced when covered by the bulk of the deposit. …

Investigation Of Implicit Methods For Solution Of The Fourier Equation, Kjell Steinar Gundersen

Theses and Dissertations

In recent years there has been an extensive development of finite difference techniques for solution of the transient heat conduction equation due to the availability of high-speed digital computers. It is the purpose of this paper to investigate and compare several implicit methods for the solution of the Fourier equation with regards to truncation error, round-off error and computer time which probably are among the most important factors to be considered in choosing a method.

An Experimental Study Of The Effects Of Welding On Cold-Worked And On Heat-Treated Steels As They Correlate To Tempering And Jominy Data, Kiran Patwari

Theses and Dissertations

Since Bernandos of Russia in 1887 applied an electric arc to weld metals, welding has become an important method of fabrication in industry. The ever increasing use of welding on a still widening variety of materials demands m ore and m ore understanding of the basic mechanisms of welding.

Transition From Laminar To Turbulent Flow For Dilute Guar Gum Solutions, Martin L. Palmer

Theses and Dissertations

Solutions of many natural and synthetic polymers have been found to reduce turbulent friction losses in flow through pipes. The basic mechanism causing these reductions is not entirely understood although two general theories have been advanced.

Design Of An Automatically Controlled-Feed, Constant Current Arc Generating Machine For Consumable Electrodes, Dhansukh J. Chauhan

Theses and Dissertations

Good welding research requires accurate control of the variables involved,to achieve consistent results. The variables involved in arc welding are of the dependent and independent type. Control of the independent variables such as arc current, arc voltage and welding velocity is necessary to control the independent variables such as penetration, electrode consumption rate, etc. The purpose of this thesis was to design, develop and test an automatic welding machine which controlled the above variables within the limits required for welding research.

Design Of An Apparatus For Study Of Stress Versus Strain As A Function Of Strain Rate In Plastics, Ashok B. Choksi

Theses and Dissertations

As new materials are developed, it is essential to study their mechanical properties experimentally. It is easy to find properties like ultimate strength, yield strength, hardness, etc., using standard techniques. It is not possible to observe the tensile behavior of materials at high strain rates using standard equipment. Plastics are often subjected to tensile loads at various rates of loading, such as when they are used to absorb impact.

Study Of Tensile Stress Versus Strain Characteristics Of Vinyl Plastic At Various Temperatures As A Function Of Strain Rate, Jitendra T. Parikh

Theses and Dissertations

The purpose of this thesis was to study the tensile-stress versus strain characteristics of vinyl plastic at various temperatures as a function of strain rate.

A Similarity Model For Flow In A Turbulent Boundary Layer, Earl Clark Lemmon

Theses and Dissertations

One of the basic goals in engineering is to generate models which will provide a means for analytically predicting observed phenomenon. Such a model is often modified several times to obtain better results. The purpose of this study was to generate a model for an equilibrium turbulent boundary layer for steady flow over a flat plate and compare the results obtained by using the model with experimental data. Part of the objective was to also suggest ways in which the model could be modified to obtain better results.

Developing Turbulent Flow In An Annulus, Dwight H. Kelly

Theses and Dissertations

Turbulent flows are encountered in nearly every case where fluid motion is involved. Since turbulent flow through relatively short annular sections occurs frequently in practical applications, e.g., flow through heat exchangers, axial flow turbomachinery and jet aircraft engines, there is a need for detailed information on this subject.

The Enrichment Of Hydro-Carbon Fuel By Aluminum Powder In An Open-Hearth Furnace, Rick Sung-Tao Lee

Theses and Dissertations

The objective of this thesis was to study theoretically the enrichment of hydrocarbon fuels with aluminum powder for an open-hearth furnace.

Electric Arc Welding Of Gray Cast Iron Without Preheating, Ramon Prestwich

Theses and Dissertations

Cast irons are iron-carbon alloys with greater than 1.7% carbon. Although white, malleable and ductile cast irons are used extensively for casting work, this study is concerned with only the gray cast irons.

The Godbeite Movement: A Dissent Against Temporal Control, Grant H. Palmer

Theses and Dissertations

The approach of the transcontinental railroad in 1869 posed several real and imagined threats to the Mormon Kingdom in the Great Basin. The Pacific Railroad ended Mormon geographic isolation and brought economic competition from the States. The railroad also made it possible for miners to get to the gold fields faster and with the heave equipment necessary to make Utah mining profitable. Sensing the political problems and the social and moral evils that would accompany the railroad, the Mormon leaders, in hopes of meeting these problems, counseled to extend their economic goal of self-sufficiency. Through stepped-up cooperation and unity they …

Pressure Carboxylation Of Lignitic Minerals With Carbon Dioxide, Kishore P. Jhamvar

Theses and Dissertations

Leonardite and lignite were carboxylated by the Kolbe-Schmitt reaction in order to increase the acidity and hence the cation exchange capacity. A larger carboxyl group content would increase solubility and effectiveness in commercial application such as a thinner for oil-well drilling fluids.

The carboxylation was performed in a heated autoclave under a high carbon dioxide pressure. The Kolbe-Schmitt reaction was used in an anhydrous medium and in a slurry medium and in a modification developed by Marasse using anhydrous potassium carbonate. The reaction material consisted of moisture free, fine powdered potassium salts of leonardite and lignite. Temperature was varied from …

A Study Of Leonardite-Water Gel Systems, Philip H. Tufte

Theses and Dissertations

Leonardite has been considered as a substitute for bentonite as an iron ore pellet binder since it would impart less undesirable impurities to the iron ore. In the case of leonardite, pellet binding strength is believed to be derived from the formation of leonardite- water gel systems. In this respect, the gels formed by addition of sodium hydroxide ("sodium gels") or sodium hydroxide and calcium hydroxide ("calcium gels") to leonardite-water slurries are of interest. Procedures were developed giving reproducible results in the preparation and study of these gel systems. The effects of variable composition, temperature, time and order of reagent …