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Articles 181081 - 181110 of 185614

Full-Text Articles in Physical Sciences and Mathematics

Conversion Of Electromagnetic Waves Into Magnetohydrodynamic Waves At The Interface Of A Dielectric And Incomprehensible Fluid, Ralph L. Marsten Jun 1959

Conversion Of Electromagnetic Waves Into Magnetohydrodynamic Waves At The Interface Of A Dielectric And Incomprehensible Fluid, Ralph L. Marsten

Physics & Astronomy ETDs

Consider space to be separated into two semi-infinite regions by a rigid boundary. On one side lies medium A--a perfect, rigid, dielectric, with electric permittivity € and magnetic permeability µ. On the other side is medium B; a perfect, fluid, perfectly conducting, also with magnet permeability µ. Throughout all spaces exist a uniform static magnetic field H.

Now such a fluid as medium B is capable of supporting a magnetohydrodynamic (MHD) wave; and of course a perfect dielectric will support an electromagnetic (EM) wave. Suppose then, that a uniform plane EM wave in medium A is incident at arbitrary angle on ...


Method For Interpreting Extensive Air Shower Data, Darrell C. Kent Jun 1959

Method For Interpreting Extensive Air Shower Data, Darrell C. Kent

Physics & Astronomy ETDs

Three major topics are discussed in this thesis. The first of these has immediate application to analysis of air shower data which is presently being gathered by two large scintillation tanks located immediately behind the University of New Mexico physics building. The data with which the other two topics are concerned cannot be gathered with present equipment, but these preliminary calculations have been performed in anticipation of the installation of the appropriate apparatus.


A Study Of The Radioactive Decay Of The Two Isomers Of Pd109 And Of The Associated Low-Lying Levels Of Ag109, John W. Starner Jun 1959

A Study Of The Radioactive Decay Of The Two Isomers Of Pd109 And Of The Associated Low-Lying Levels Of Ag109, John W. Starner

Physics & Astronomy ETDs

The radiations of Pd109 (13.45 ± 0.01 hr) and Pd109m(4.69 ± 0.01 min) have been investigated with a coincidence scintillation spectrometer and a solenoidal beta-ray spectrometer. Pd109m was observed to have only one mode of decay: a 188-kev (E3) isomeric transition to Pd109. The principal beta-ray group (>99.9%) of Pd109 was found to have an end-point energy of 1.025 ± 0.005 Mev. Gamma rays of the following energies (kev) and approximate intensities (photons/105 disintegrations) were observed to acccmpany the decay of Pd109: 773 (4), 707 (2), 643 ...


Mineral Deposits Of The Granite Gap Area, Hidalgo County, New Mexico, David N. Cargo Jun 1959

Mineral Deposits Of The Granite Gap Area, Hidalgo County, New Mexico, David N. Cargo

Earth and Planetary Sciences ETDs

The Granite Gap area lies in the central part of the Peloncillo Mountains about 28 miles southwest of Lordsburg, New Mexico. Ores of lead, zinc, silver, and tungsten from four separate deposits have been mined there during the past seventy years.


An Experimental Method Of Determining The Shape Of Millimicrosecond Radiation Pulses, Robert Braslau Jun 1959

An Experimental Method Of Determining The Shape Of Millimicrosecond Radiation Pulses, Robert Braslau

Physics & Astronomy ETDs

The problem with which this investigation is concerned was to construct suitable apparatus to measure accurately the shape and the duration of a pulse of δ-radiation of approximately 10 Mev energy and 20 mμ sec duration. In particular, the shape of the tail of the pulse had to be determined as accurately as possible, so that millimicrosecond half lives can be measured accurately with the betatron.


Recording Of Geomagnetic Field Variations In An Orthogonal System, Chistian Schroeder Jun 1959

Recording Of Geomagnetic Field Variations In An Orthogonal System, Chistian Schroeder

Physics & Astronomy ETDs

Magnetic field variations in both magnitude and direction are known to occur due to such phenomena as atmospheric tides and solar activity. Magnetic storms caused by solar activity may bring about variations in excess of one percent of the magnitude of the earth's normal magnetic field; but in general the changes are slight and require sensitive instruments for their measurement.


Characteristics And Calibration Of A Large Liquid Scintillator, James R. Barcus Jun 1959

Characteristics And Calibration Of A Large Liquid Scintillator, James R. Barcus

Physics & Astronomy ETDs

It is the purpose of this thesis to present in some detail the method and results of the calibration -- in particular, the determination of the single particle pulse height which is crucial to any meaningful interpretation of the observational data.


Geology Of Newman Ridge And Brushy-Indian Ridge Between Sneedville, Hancock County, Tennessee, And Blackwater, Lee County, Virginia, Adrian Vance Greene Jun 1959

Geology Of Newman Ridge And Brushy-Indian Ridge Between Sneedville, Hancock County, Tennessee, And Blackwater, Lee County, Virginia, Adrian Vance Greene

Masters Theses

The area described in this thesis comprises portions of northeastern Hancock County, Tennessee, and southeastern Lee County, Virginia (Figure 1). It includes parts of the Sneedville and Kyles Ford quadrangles (Tennessee Valley Authority and United States Geological Survey topographic maps 170-SW and 170-SE respectively).

The mapped area, bounded on the southeast by the Hunter Valley fault and on the northwest by Blackwater Valley, is approximately fifty miles west of Bristol, Tennessee-Virginia, and fifty-five miles northeast of Knoxville, Tennessee. It is about eleven miles long and three miles wide and encloses approximately thirty-three square miles.


Light Scattering By Silicic Acid Gel-Forming Mixtures, Bruce Monroe Manzer Jun 1959

Light Scattering By Silicic Acid Gel-Forming Mixtures, Bruce Monroe Manzer

Honors Theses

In this investigation the scattering of light by silicic acid gel-forming mixtures has been studied during the process of gel formation in an effort to extend the work already done on their structure and the mechanism of gel formation. The intensity of the scattered light has been measured by means of Fisher Nefluoro-photometer and an attempt has been made to use the results in explaining the change which the gel-forming mixtures undergo during gel formation.


Microscopic Radial Lines In Gels, Robert Peter Frosch Jun 1959

Microscopic Radial Lines In Gels, Robert Peter Frosch

Honors Theses

There are many interesting formations which may be prepared in gels. Probably the best known are Liesegang rings, first prepared in the latter nineteenth century and observed previously in such naturally occurring materials as agate. Besides rings periodic radial structures have been observed in gelatin. Some of these radial formations are visible to the naked eye; others may be observed only under a microscope. It is one of the radial formations of the layer type which will be discussed in this paper. For want of a better name the formation to be discussed will simply be referred to as radial ...


Studies Of Reductions Of Unsaturated Compounds With Lithium Aluminum Hydride, Robert William Barito Jun 1959

Studies Of Reductions Of Unsaturated Compounds With Lithium Aluminum Hydride, Robert William Barito

Honors Theses

Our work has involved the reduction of certain alpha-beta unsaturated carbonyl compounds and the reduction of two compounds that did not contain alpha-beta unsaturated carbonyls.


Paper Chromatography Of The Dicarboxylic Acids And The Polyhydric Alcohols, Albert Esposito Jun 1959

Paper Chromatography Of The Dicarboxylic Acids And The Polyhydric Alcohols, Albert Esposito

Honors Theses

The objective of this work was to develop a paper chromato­graphic technique applicable to the separation and identification of the dicarboxylic acids and the polyhydric alcohols.


The Photogalvanic Effect, George Henry Hofmann Jun 1959

The Photogalvanic Effect, George Henry Hofmann

Honors Theses

The photogalvantic effect has been studied by relatively few people. Perhaps the largest contribution to the study of this effect has been by E. Rabinowitch while the Massachusetts Institute of Technology and terminated in 1940. At this time Rabinowitch indicated the possibilities in the utilization of solar energy by the photogalvantic effect (1). Presented here is a study of the effect using a modified form of the apparatus used by Rabinowitch. An attempt is made at explaining the results obtained, the advantages and disadvantages of the apparatus used and suggestions are given for improvement. A specific photogalvantic system of high ...


A Study Of The Volume Change During The Setting Of Silicic Acid Gel, Richard Joseph Miller Jun 1959

A Study Of The Volume Change During The Setting Of Silicic Acid Gel, Richard Joseph Miller

Honors Theses

An investigation of the volume change during the setting of silicic acid gel was made using a precision mercury dilatometer. The effects of varying the silicate and acid concentrations were studies. The heat of neutralization of the acetic acid and sodium silicate was compensated for to prevent any heat expansion in the gel. Also discussed are the theories of the setting of the gel.


A Study Of Aluminum Phosphates Using Infrared Spectroscopy, Michael Miller Jun 1959

A Study Of Aluminum Phosphates Using Infrared Spectroscopy, Michael Miller

Honors Theses

The infrared spectra of aluminum metaphosphate, aluminum pyrophosphate, and the ortho acid phosphates were studies in the 2u to 15u region. The distinct absorption regions of each compound were located. The type of bond which caused the absorption is suggested. The spectra of the aluminum phosphates were found to be very similar to the spectra of other phosphates.


Preparation Of Yttrium Flouride Using Fluorine, R. L. Tischer, G. Burner Jun 1959

Preparation Of Yttrium Flouride Using Fluorine, R. L. Tischer, G. Burner

Ames Laboratory Technical Reports

This report deals with the preparation of a low oxygen content yttrium fluoride using commercial fluorine gas. It was shown that the purity of yttrium fluoride prepared using hydrogen fluoride gas could be improved by treating it with fluorine (1) at a temperature of 600°c under pressures in the range 20 - 25 psig or, to a lesser degree, (2) at 25°C and 1 atmosphere pressure.

Preparation of yttrium fluoride by direct fluorination of yttrium oxide was found to be a spontaneous process which ceases short of equilibrium under the conditions studied. Fluorination of yttrium chloride resulted in a ...


Part I: The Catalytic Hydrogenation Of Nitro Compounds Over Supported Rhodium In Acetic Acid; Part Ii: The Exchange Of Deuterium Gas And Methanol In The Presence Of Raney Nickel, Burch Byron Stewart Jun 1959

Part I: The Catalytic Hydrogenation Of Nitro Compounds Over Supported Rhodium In Acetic Acid; Part Ii: The Exchange Of Deuterium Gas And Methanol In The Presence Of Raney Nickel, Burch Byron Stewart

Doctoral Dissertations

An improved effusiometry apparatus for analyzing hydrogen and deuterium mixtures was constructed and utilized to study the exchange reaction of deuterium with methanol over Raney nickel catalyst.

The exchange reaction was zero order with respect to deuterium pressure and pseudo-zero order with respect to methanol concentration. The apparent activation energy was found to be 3.5 kcal./mole. The specific reaction rate was 2.9 1. mm. min.-1 g.-1.

The effects of nitro compounds upon the exchange of deuterium with methanol over Raney nickel were studied. All of the compounds decreased the exchange at very low concentrations and ...


Topological Groupoids, Ronson J. Warne Jun 1959

Topological Groupoids, Ronson J. Warne

Doctoral Dissertations

A groupoid is a set G in which a single valued product ab is defined for every pair of elements a, b ε G. If G is a groupoid and at the same time a Hausdorff topological space, and, moreover, the multiplication in the groupoid G is continuous in the topological space G, then G is called a topological groupoid. Our aim in this dissertation is two-fold: (1) to study topological groupoids for their own sake; (2) to investigate the relation of certain topological properties to associativity. We note, in relation to the first motif, that many authors have dealt ...


Part I: A Study Of The Catalytic Hydrogenation Of Hydroxybenzenes Over Plantinum And Rhodium Catalysts; Part Ii: The Kinetics Of The Acid-Catalyzed Hydrolysis Of The Dimethyl Esters Of Cyclohexanedicarboxylic Acids, Billy Lee Stump Jun 1959

Part I: A Study Of The Catalytic Hydrogenation Of Hydroxybenzenes Over Plantinum And Rhodium Catalysts; Part Ii: The Kinetics Of The Acid-Catalyzed Hydrolysis Of The Dimethyl Esters Of Cyclohexanedicarboxylic Acids, Billy Lee Stump

Doctoral Dissertations

Summary: The dimethyl esters of isometric 1,2-, 1,3-, and 1,4-cyclo-hexanedicarboxylic acids have been prepared and the rates of their acid catalyzed hydrolyses in 70 per cent acetone have been determined. All hydrolysis reactions wre run at four temperatures, 25°, 35°, 45°, and 55°. The rate constants for the hydrolyses at each of these temperatures, along with the activation energies for the reactions, have been tabulated in Table IV.

The rates of hydrolysis of the cis-1,3 and trans-1,4 diesters were found to be almost identical. Similarly, the reaction rates of the trans-1,3 ...


The Geology Of The Flag Pond Quadrangle, Tennessee-North Carolina, Ebraham Shekarchi Jun 1959

The Geology Of The Flag Pond Quadrangle, Tennessee-North Carolina, Ebraham Shekarchi

Doctoral Dissertations

Purpose and Scope of the Investigation:

Several workers, as indicated in the following section, have commented upon the geology of the Flag Pond Quadrangle, but none have mapped or studied the area in detail--nor indeed, much of the adjacent region. Consequently, the purpose of this investigation is to obtain a comprehensive picture of the geology of the quadrangle.

The geology of the quadrangle is divisible into two natural units or parts, each with problems unique unto itself. The first of these units is the crystalline complex, the second is the sedimentary sequence which rests upon the crystalline rocks. The purpose ...


On Differentiable Manifolds, Yuen-Fat Wong Jun 1959

On Differentiable Manifolds, Yuen-Fat Wong

ETD Collection for AUC Robert W. Woodruff Library

No abstract provided.


Pennsylvanian Spores From The Sandia Formation Santa Fe County, New Mexico, Thomas L. Carten May 1959

Pennsylvanian Spores From The Sandia Formation Santa Fe County, New Mexico, Thomas L. Carten

Earth and Planetary Sciences ETDs

No abstract provided.


Petrology Of The Tijeras Greenstone, Bernallio County, New Mexico, John J. Bruns May 1959

Petrology Of The Tijeras Greenstone, Bernallio County, New Mexico, John J. Bruns

Earth and Planetary Sciences ETDs

The Precambrian metamorphosis rocks of the Tijeras Canyon area crop out along a five-mile, northeast-trending belt, which lies approximately five miles east of the Sandia Mountains front, in north-central New Mexico. The sequence, to the east, is overlain uncomfortably by Pennsylvanian Madera limestone, while the trace of the Tijeras fault marks the western side.


Liquid Scintillators. Some Aryl Substituted Phenanthrenes And Dihydrophenanthrenes, And Related P-Terphenyls And P-Quaterphenyls, Stephen Paul Birkeland May 1959

Liquid Scintillators. Some Aryl Substituted Phenanthrenes And Dihydrophenanthrenes, And Related P-Terphenyls And P-Quaterphenyls, Stephen Paul Birkeland

Chemistry ETDs

The liquid scintillation system has three basic components:

(1) A scintillation solution consisting of an efficient solvent and a fluorescent solute.

(2) A photomultiplier tube.

(3) An electronic system for measuring and recording the voltage pulses generated by the photomultiplier from the photons impinging on it.


The Geology Of South Fork Thrust And Subsurface Geology Of The Belknap Ranch, Park County, Wyoming, James L. Deurmyer May 1959

The Geology Of South Fork Thrust And Subsurface Geology Of The Belknap Ranch, Park County, Wyoming, James L. Deurmyer

Earth and Planetary Sciences ETDs

The segment of the South Fork thrust in the Belknap ranch area contains rocks representative of the Upper Jurassic, Lower Cretaceous and Upper Cretaceous. The thrust plate occupies 75 percent of the mapped area. Approximately 3,500 feet of predominantly marine rocks comprise the detachment thrust and about 15 percent of the exposed rocks of the thrust plate is sandstone and conglomerate. All the rock units present in the thrust plate crop out beyond the edge of the over-riding mass except the Sundance and Morrison formations. Approximately 4,600 feet of geologic section is exposed of drilled in the mapped ...


Lithogenesis Of The Pennsylvanian Madera Formation Of Palomas Peak, Sandia Mountains, New Mexico., Ronald D. Perkins May 1959

Lithogenesis Of The Pennsylvanian Madera Formation Of Palomas Peak, Sandia Mountains, New Mexico., Ronald D. Perkins

Earth and Planetary Sciences ETDs

The Pennsylvanian Madera formation of Palomas Peak in the Sandia Mountains of central New Mexico is a sequence of marine limestone and minor sandstone that ranges in age from Desmoinesian to Virgilian. The limestone is predominantly clastic or bioclastic and the sandstone is arkosic. Lithologic and paleontologic evidence suggests an epineritic to infraneritic environment on a gently subsiding shelf during deposition of the Madera Sediments.

Rhythmic deposition at Palomas Peak is evidenced by alternating clastic and bioclastic limestones which may have resulted from: (1) eustatic changes in sea level, (2) tectonic fluctuations in the downwarping of the shelf, or (3 ...


The Absolute Excitation Functions For The I 127 (N,Y) I 128 And Na 23 (N,Y) And Na 24 Reactions, Richard L. Cubitt May 1959

The Absolute Excitation Functions For The I 127 (N,Y) I 128 And Na 23 (N,Y) And Na 24 Reactions, Richard L. Cubitt

Physics & Astronomy ETDs

Radiative capture (n,y) cross sections, in addition to their theoretical interest, are of great practical importance to the technology of reactor design. A knowledge of the absolute excitation functions of the various materials employed in reactors permits calculation of the effect of these materials on the reactivity of a reactor, and also enables shielding calculations to be made.


The Heats Of Combustion Of Some Rare-Earth Metals, F. H. Spedding, R. E. Eberts, A. W. Naumann May 1959

The Heats Of Combustion Of Some Rare-Earth Metals, F. H. Spedding, R. E. Eberts, A. W. Naumann

Ames Laboratory ISC Technical Reports

A bomb calorimeter for measuring the heats of combustion of neodymium, samarium, gadolinium and erbium is described. The heats of combustion of these metals and the heats of formation of their oxides are reported.


Geology Of The Upper Middle Creek Area Huerfano County, Colorado, J. H. Copeland May 1959

Geology Of The Upper Middle Creek Area Huerfano County, Colorado, J. H. Copeland

Open-Access* Master's Theses from the University of Nebraska-Lincoln

The Sangre de Cristo Mountains of Colorado and New Mexico are, geologically speaking, relatively unknown. The equivocal nature of our knowledge of the range was a primary reason for studying a portion of it in some detail. Most of the previous studies have been concerned with the northern part of the range in Colorado, in the general area between Salida and La Veta Pass. This work has indicated that the complicated structure which characterizes the northern part of the range becomes simpler to the south. Therefore, a second objective of the current study has been to test this hypothesis. Thirdly ...


A Mathematical Theory Of Retail Space Management, Harlan D. Mills May 1959

A Mathematical Theory Of Retail Space Management, Harlan D. Mills

The Harlan D. Mills Collection

No abstract provided.