Digital Commons Network^™

An Experimental Investigation Of A Light Weight High Voltage Power Supply, James F. Tribby

Physics & Astronomy ETDs

This investigation is directed toward the development and design of an electronic high-voltage power supply. The method consists of obtaining a direct current of low intensity by periodically charging by means of a primary battery a group of capacitors in parallel combination and discharging them electronically in series. A stimulus to this investigation is provided by the need for a light-weight electronic current source operating at moderately high voltages which is stable and capable of maintaining a constant current of low intensity over a wide range of variation of the potential from a primary battery. In addition, a power supply …

A Preliminary Study Of The Distribution Of Fleas In Utah Known To Be Capable And Potential Vectors Of Plague, Dorald M. Allred

Theses and Dissertations

Plague outbreaks in the past have been disastrous where domestic rats and their fleas of certain species were common. Plague has been known to occur in most parts of the world (Robertson 1923), and has occurred as human epidemics for many centuries (Dubos 1948).

History Of The Radio Division Of Indiana State Teachers College, Ruth Holaday Morgan

All-Inclusive List of Electronic Theses and Dissertations

No abstract provided.

Tetranitromethane And Related Compounds, Thomas James Tully

Theses

No abstract provided.

A Study Of Reaction To Frustration In Stutterers, Leroi Madison

Speech and Hearing Sciences ETDs

It was the purpose of this study to compare the responses of a group of stutterers on the Rosenzweig Picture-Frustration Study with the norms established for that study to determine whether, as a group, they show any significant differences in (1) the direction of aggression, and (2) the type of reaction to frustration.

The Literary Tradition Of The Scientific Romance, Frank Davis Adams

English Language and Literature ETDs

The following dissertation has two primary purposes. The first is to plead for a recognition of the scientific romance as an independent genre in the school of the novel. The second purpose is to examine the twentieth-century examples of the scientific romance. Although I have gone rather thoroughly into the matter of defining the "scientific romance" in the first chapter, it would be well here to give a brief, general definition of the form. A scientific romance is an imaginative story which employs as its background or framework extensions of facts of actual or hypothetical science. The science thus utilized …

An Investigation Of The Comparative Effects Of Several Fill Materials On Heat Losses In The Ground From A Radiant Floor Panel, Peter H. Benedict

Mechanical Engineering ETDs

It was the purpose of this investigation to compare the amounts of heat lost into the ground and through the foundation walls of a small test cubicle heated by means of a radiant floor panel when the fill material under the floor slab consisted of either crushed stone, pumice aggregate, or dry-compacted soil.

Women In The Novels Of Benito Perez Galdos, Elizabeth T. Stout

Spanish and Portuguese ETDs

Since no writer works in a historical or social vacuum, it is necessary, before considering the women in the novels of Benito Pérez Galdós, to consider briefly what the author inherited from Spanish literature and what he acquired from foreign sources.

The Variation Problems Of Weierstrass-Bliss And Radon, Douglas M. Gragg

Mathematics & Statistics ETDs

Problems of the Calculus of Variations are generalizations of the familiar minimum problems treated in the differential calculus. The relationships between the ordinary minimum problems of the calculus and the generalizations dealt with in the Calculus of Variations is possibly best seen by examining the general Hilbert-Moore minimum problem, and the special examples of such problems formulated in the table below.

The In Vitro Determination Of Human Blood Oxygen Saturation In The Presence Of High Concentrations Of Carbon Dioxide, Elizabeth D. Armstrong

Biology ETDs

Mayow’s work in 1673 is cited by Landois (1905) as the first demonstration of the liberation of gases from blood in a vacuum. In 1863 Meyer, Ludwig, and Pfleuger established that the oxygen leaving the lung was transported in a combined form with hemoglobin and that the oxygen was released into the tissues accompanied by a change in color of the blood.

The Chemical Characteristics Of 8.0-Day I131 Produced By The Beta Decay Of 25-Minute Te131 In Organic Liquids, Francis J. Keneshea Jr.

Chemistry and Chemical Biology ETDs

In 1934 Szilard and Chalmers found that a large fraction of the radioactive iodine produced in the thermal neutron irradiation of ethyl iodide could be extracted from the irradiated material. The procedure followed was to add a trace of carrier iodine to the irradiated liquid, extract the iodine with an aqueous solution of a reducing agent and precipitate the iodide as silver iodide. The silver iodide precipitate obtained in this manner contained a large fraction of the iodine activity (25-minute I¹²⁸), at a high specific activity. Since ethyl iodide is not soluble in water and hence is not …

The Diophantine Equation, Frederic C. Barnett

Mathematics & Statistics ETDs

In the first part of Chapter II of this thesis a study is made of these surfaces F_n. In the second part of Chapter II, several differential geometric properties of F_n are adduced, and again, an attack based on certain of these is shown to lead to the very theorem we seek to prove. Finally, we obtain three geometrical implications of the assumption that an integral triad exists on F_n suggesting new lines of attack on the theorem of Fermat.

Inverse Problems Of Hamel-Type., Robert G. Schrandt

Mathematics & Statistics ETDs

The formulation and discussion of the simplest (fixed) end point direct problem of the calculus of Variation is a necessary preliminary to attack on the inverse problems considered in Chapters II and III of this thesis. Since the plane problem is already comprehensively treated in the literature, only enough of its theory is developed here to render intelligible to the reader the inverse problems studied in the sequel.

History Of The El Paso Area 1680-1692, Vina Wals

History ETDs

For twelve years after the Pueblo Revolt of 1680 what was left of Spanish New Mexico was scattered through the El Paso district, with El Paso serving through most of that period as the official capital. Possibly because the area has been a sort of everyman's land, involved in North Mexican, Texan, and New Mexican history, it has been either neglected or distorted by historians. The drama of the beginning and of the end of the twelve years has been exploited, and one excursion into the middle period completed. There has been no treatment of the twelve years as a …

Anisotropism In Garnets, Arthur B. Merkle

Earth and Planetary Sciences ETDs

Six anisotropic garnets are studied by optical, thermal, and X-ray diffraction methods in an attempt to determine the cause of anisotropism. The garnets are all ungrandites with compositions ranging from chromian grossularite to nearly pure andradite, the composition having been estimated from indices of refraction and unit cell dimensions. In all cases the birefringence is 0.004 or less. Both positive and negative uniaxial and biaxial figures are sometimes observed. Heating of the garnets at 900°C for periods of 96 to 264 hours reduced the anisotropism in five of the six garnets studied; this observation is in agreement with previously reported …

An Experimental Investigation Of The Te01 Electromagnetic Fields In Ridge Waveguide, George A. Arnot Jr

Electrical and Computer Engineering ETDs

The aim of this thesis is to arrive at the field distribution of the ridge waveguide for the TE₀₁ mode, either mathematically or experimentally, the latter proving to be the case. Under the heading of Theoretical Considerations the difficulties involved in obtaining a mathematical solution to the problem are presented. The experimental results then follow and in the Conclusions a comparison is made of the results obtained by other writers and the author's data.

Frequency Modulated Audio Oscillators, James L. Dossey

Electrical and Computer Engineering ETDs

It was therefore the purpose of this study (1) to evaluate existing sub-channel oscillator circuits seeking first, to improve them; (2) to uncover new ideas, and to incorporate them into a frequency modulated audio oscillator that would satisfactorily fulfill the required specifications; (3) once such a circuit was found, to obtain such refinements as simplicity of alignment, interchangeability of tubes, better frequency stability by utilizing proper mechanical design, and smaller, cheaper parameters without sacrificing performance.

A Sine-Wave Frequency Dividing Circuit, Louis L. Fisher

Electrical and Computer Engineering ETDs

The scope of this thesis was to investigate the stability, dividing range and some of the characteristics of a new type of sine-wave frequency divider.

An Experimental Determination Of The Distribution Of Core Location Of Extensive Air Showers, Jerre P. Moore

Physics & Astronomy ETDs

It is the purpose of this paper to investigate the distribution of the core location of extensive air showers striking near an array of liquid scintillators.

Nationalism: A Search For Unity, The Role Of The Mexican Government In Sponsoring Contemporary Fine Arts, Katharine Ferris Nutt

History ETDs

The following discussion is in part the history of nationalism in the fine arts of Mexico, as a spontaneous expression and as one artificially stimulated. Of equal concern, however, are the State's endeavors to channel nationalism by controlling the bellas artes through subsidy, decree, and law, and finally by the creation of a national institute or theater. The writer has endeavored to reveal both the advantageous and disadvantageous aspects of the government's control and to render some idea as to the extent to which cultural nationalism may forge permanent unity among the Mexicans.

Nationalism: A Search For Unity The Role Of The Mexican Government In Sponsoring Contemporary Fine Arts, Katherine Ferris Nutt

History ETDs

Nationalism is commonly interpreted as evidence of an "inferiority complex," a kind of adolescent attitude on the part of a nation to assert itself in lieu of holding rank as a world power. A more kindly concept of nationalism defines it as a "declaration of independence," an inherent desire of a people to stand in their own strength. Nearly always the existence of nationalistic attitudes implies a need for unity and a desire for common ideals and values, for one tradition. Nationalism may also mean that a country possesses pride and self-respect, that it is aware of its own ability …

The Kinetics Of The Exchange Between Benzyl Iodide And Iodide Ion, Paul Stillson

Chemistry and Chemical Biology ETDs

A general form of an ion-molecule replacement reaction occurring at a saturated carbon atom may be represented by

Y^-+R-X⇋Y-R+X^-

where Y- is a negatively charged atom or group which can replace an atom or group X in the molecule R-X and R is any organic radical which is saturated at the point of attachment of X. The mechanisms which have been postulated for the above reaction may be divided into the following two groups: (1) those which assume primary dissociation of the neutral organic reaction into ions as the rate-determining step; (2) those which postulate the formation …

Induced Neoteny In Ambystoma Tigrinum Mavortium Baird I. Treatment With Non-Hypophyseal Hormones, John E. Furchner

Biology ETDs

Metamorphosis in amphibia has been the subject of many investigations, not only because the phenomenon is a manifestation of growth and differentiation, but also because of the close relationship between metamorphosis and the thyroid gland.

National Elements In The Poetry Of Guatemala, Grace Nichols

Spanish and Portuguese ETDs

Throughout the history of Guatemala, poetry has been a constant outlet for the spirit of the land. Guatemalan writers share the Latin Americans' inclination toward expression in verse which has been called the "enfermedad latinoamericana." Rare is the educated Guatemalan who at least in his youth has not contributed his quota of verse. Guatemalan poetic proclivity is the more apparent when one considers that the poetry of that land has been produced by only a small part of the population since the non-contributing indigenous peoples form the majority of the three million inhabitants.

Sulphidizing Of Cerussite, Emil A. Kovacevich

Bachelors Theses and Reports, 1928 - 1970

The oxide minerals, such as cerussite, are not as amen­able to flotation as the sulphide minerals. Sulphidization is the usual means used today to increase the recovery of an oxide flotation; however, sulphidization under the most ad­vantageous conditions does not yield very satisfactory re­coveries.

Faunal Studies Of The Lower Jefferson Limestones, James L. Eymann

Bachelors Theses and Reports, 1928 - 1970

The exact geologic age of the Jefferson limestone in Montana has not been definitely determined, other than it is probably of upper, but possibly in part of middle Devonian age. Although not of immediate or apparent economic importance, the determination of the exact age of the Jefferson limestone may be of much value in connection with the discoveries of large quantities of oil in Devonian strata in the northern Great Plains and, in particular, with the extensive deep drilling in northeastern Montana which is anticipated during the summer of 1951.

The Groundwater Of The Area North Of Flathead Lake, Montana, Frederick M. Hilpert

Bachelors Theses and Reports, 1928 - 1970

The purpose of this investigation is to determine the reasons for the ground water variations in the area north of Flathead Lake, Montana. Several methods were used in pursuing this investigation. Hydrographs were made of the various wells showing the season to season change as well as the year to year variation.

A Mineralogical Investigation Of Some Montana Hydrobiotites, John W. Baker

Bachelors Theses and Reports, 1928 - 1970

Vermiculite is one of the most recent important nonmetallic minerals to be exploited for use in the industrial world. For this reason, the fund of knowledge relating to this mineral is rather limited. This paper represents the results of laboratory studies that were undertaken to contribute data to this fund of knowledge.

The Development Of The Scholander Micro-Respirometer For Use In The Study Of Metabolism In Bacterical Endospores, Phillip G. Crook

Biology ETDs

In this paper, the Scholander micro-respirometer has been adapted, and techniques worked out, to permit its use in attacking the problems associated with endospore respiration.

Colorimetry And Its Application To Analytical Methods, William L. Walls

Biology Honors Papers

This 46 page thesis discusses the theory and history of colorimetry and describes colorimetric analysis of organic and inorganic constituents of the human body and a few of the lower vertebrates.