Physical Sciences and Mathematics Commons^™

Cis Labilization: A Study Of The Reactions Of Group 6 Pentacarbonyl Phosphido Anions, Matthew J. Madigan

Masters Theses

The synthesis of cis-(OC)₄M(PPh₂H)L (M=Cr,Mo,W; L=PPh₃,PPh₂Et,PPhEt₂,PEt₃) can be achieved by treating (OC)₅MPPh₂H with potassium tert-butoxide in the presence of L. […] The products are easily isolated and are not contaminated with trans isomers. Obtained as a minor product is [(OC)₄MPPh₂]₂.

The reaction of (OC)₅WPPh₂H with potassium tert-butoxide generates [(OC)₅WPPh₂]^- which reacts with (OC)₅WPPh₂H to give [(OC)₅WPPh₂W(CO)₅] …

Spectroscopic Studies Of Pre-Mixed Hydrocarbon Flame Plasmas, Tsao-Chin C. Huang

Masters Theses

This thesis contains two different studies.

Chapter 1, "Infrared Emission Spectrum of the Hydroxyl Radical.", is in collaboration with Dr. Giles L. Henderson and Mr. Chun-Sheng Ko. This chapter has been submitted and accepted for publication by the Journal of Chemical Education.

In this chapter, we describe a rather novel physical chemistry experiment in which ab initio potential parameters for the OH radical are compared with those obtained from the ir emission spectrum of an oxy-acetylene welding torch.

Chapter 2, "A Preliminary Spectroscopic Study of Field-Induced Ion Movements in Flame Gases.", describes the effects of longitudinal electric fields on CH …

The Distribution And Relative Abundance Of Aquatic Oligochaeta In The Upper Cache River System, Southern Illinois, In Relation To Water Quality, Mark Julian Wetzel

Masters Theses

Species composition, distribution, abundance, and water quality relationships of aquatic oligochaetes occurring in the upper Cache River system, southern Illinois were investigated. Forty-two taxa of oligochaetes including 16 naidids, 22 tubificids and representatives of the families Aeolosomatidae, Branchiobdellidae, Enchytraeidae, and Lumbriculidae were collected. Four species of oligochaetes new to Illinois, Limnodrilus psammophilus Loden, L. rubripenis Loden, Psammoryctides (Spencerius) californianus Brinkhurst, and Haemonais waldvogeli Bretscher were collected during this study. Another species of Limnodrilus new to science is reported here, as yet undescribed. The thesis that aquatic oligochaetes can be used as true water quality indicator organisms is rejected. It is …

The Geology And Environment Of Deposition Of The Kinneman Creek Interval, Sentinel Butte Formation (Paleocene), North Dakota, Katherine J. Logan

Theses and Dissertations

To date, most environmental reconstructions of lignite bearing formations in western North Dakota have been done on a formational scale. The objective of this study was to investigate one of the non-lignite intervals, the Kinneman Creek Interval, directly above the strati graphically lowest lignite in the Paleocene Sentinel Butte Formation. The Kinneman Creek Interval has been recognized in the Sentinel Butte Formation throughout most of western North Dakota.

The field area is located in west-central North Dakota in Mercer, Oliver, and McLean Counties and is bi sected by the Missouri River. Excellent exposures are provided in the highwalls of Baukol-Noonan, …

Stratigraphy And Sedimentology Of The Sentinel Butte Formation (Paleocene) Near Lost Bridge, Dunn County, West-Central North Dakota, Bradley D. Nesemeier

Theses and Dissertations

The Sentinel Butte Formation (Paleocene) near Lost Bridge, Dunn County, west-central North Dakota, is 190 meters thick, and is charac terized by four main lithologies: sand, silt, clay, and lignite. The study interval is ISO meters thick, and lies between the basal sand of the formation and the Bullion Butte lignite bed, neither of which are exposed in the immediate study area. Sand, gray to yellow, makes up about 3S% of the interval studied. It occurs in tabular beds 2-18 meters thick. It is fine to very-fine, angular, and composed largely of quartz, feldspar, rock fragments, with minor amounts of …

Petrology Of The Cenozoic Phonolites And Related Rocks Of The Houston Creek Area, Bear Lodge Mountains, Wyoming, Frederick S. O’Toole

Theses and Dissertations

The purpose of this study was to map and study the characteristics and origin of the Cenozoic phonolites and related rocks of the Houston Creek area, located on the southwestern flank of the Bear Lodge Mountains, 10 km northwest of Sundance, Wyoming. Mapping was conducted on a 2 1:10,000 scale over a 16 km area. Microprobe, optical, and x-ray diffraction procedures were employed to observe and describe petrographic and chemical characteristics of the rocks.

The Cenozoic igneous rocks of the Houston Creek area are classified as phonolite, phonolite porphyry, trachyte porphyry, sodalite-bearing phonolite and altered felsite. These hypabyssal rock types …

Triple Gamma Directional Correlations In The Decay Of Europium-154, Gary Lewis

Gary C. Lewis

The ('154)Eu nucleus decays by beta emission to an excited state of the ('154)Gd nucleus. The resulting ('154)Gd nucleus decays to its ground state by emission of gamma rays. One series of gamma rays emitted in this process is a cascade of energies 723 keV, 873 keV, and 123 keV. The 873 keV gamma ray is a mixture of E2 and M1 radiation. The mixing ratio of this transition has been measured using the triple gamma directional correlation technique. The experiments used a planar geometry with one angle fixed at 90 degrees. Two Ge(Li) detectors and one NaI(T1) detector were …

An Oscillation Condition For Differential Equations Of Arbitrary Order, William F. Trench

William F. Trench

No abstract provided.

Limits Of Certain Sequences Associated With Cylinder Functions, William F. Trench

William F. Trench

No abstract provided.

Quaternary Geology Of Chaco Canyon, Northwestern New Mexico, David Waxham Love

Earth and Planetary Sciences ETDs

The overall purpose of studying the Quaternary geology of Chaco Canyon is to develop an understanding of how the geomorphic system in the Chaco drainage evolved and how it presently operates. This dissertation has several subsidiary purposes; (1) to describe and relate modern sedimentary features and facies (which are likely to be preserved in the alluvial fill of the canyon) to modern geomorphic processes, (2) to use the results from the study of modern sediments to interpret exposures of alluvium in Chaco Canyon in order to reconstruct past environments, (3) to develop conceptual models of the geologic subsystems of the …

The Dependence On Zenith Angle Of The Strength Of 3-Meter Equatorial Electrojet Irregularities, H. M. Ierkic, Bela G. Fejer, D. T. Farley

Bela G. Fejer

Radar measurements in Peru were used to deduce the zenith angle dependence of the scattering cross section of plasma irregularities generated by instabilities in the equatorial electrojet. The irregularities probed by the 50 MHz Jicamarca radar had a wavelength of 3m. The cross section for the type 2 irregularities was isotropic in the plane perpendicular to the magnetic field, while the cross section for the stronger type 1 irregularities varied with zenith angle at a rate of approximately 0.3 dB/degree; the horizontally traveling waves were more than 100 times stronger than those traveling vertically.

Volume 4, Number 12 (December 1980), The Solar Ocean Energy Liaison

The OTEC Liaison

No abstract provided.

Fertilizer Recommendations, William O. Thom

Soil Science News and Views

Fertilizer recommendations are interpreted from a soil test value. The interpretations are based on field research that compares crop yield to soil test levels and the amount of fertilizer applied. These field studies provide data to compare relative yield of a crop for a measured soil test value and fertilizer recommendations are then calibrated to these soil test values.

Ring Strain In Cyclopropane, Cyclopropene, Silacyclopropane, And Silacyclopropene, Mark S. Gordon

Mark S. Gordon

The strain energy in four three-membered rings is calculated by using the appropriate isodesmic reactions. Calculations with and without d functions on the heavy atoms indicate that while these polarization functions tend to reduce ring strain, the addition of d orbitals has little effect on the predicted trends. While introduciton of unsaturation drastically increases the strain in the carbon system (cyclopropane---. cyclopropene), this is not the case for silicon (silacyclopropane--+ silacyclopropene). As a result cyclopropane and cyclopropene are predicted to be the least and most strained rings, respectively.

Centers Of Polymer Research; Polymer Science In Silesia, Poland:Gliwice, Zabrze, Otto Vogl, W. Pradellok

Otto Vogl

No abstract provided.

Some Computational Aspects Of Queueing Network Models, Herb Schwetman

Department of Computer Science Technical Reports

No abstract provided.

Monthly Planet, 1980, December, Mark Gardner, Huxley College Of The Environment, Western Washington University

The Planet

No abstract provided.

Improving Physics Teaching, Robert Fuller

Robert G. Fuller Publications

I began this editorial with a desire to take up battle against the recent ills of physics teaching. I paused to peruse the AAPT reprint book, 50 Years on Teaching Physics, edited by Melba Phillips.

High Flux Beam Source Of Thermal Rare-Gas Metastable Atoms, D. W. Fahey, William F. Parks, Laird D. Schearer

Physics Faculty Research & Creative Works

A high-flux beam source has been constructed for the production of helium, neon and argon metastable atoms. The source is a DC electric discharge maintained in an expanding gas. A metastable flux of 3.5*1014, and 7.2*1013 atoms s-1 sr-1 has been achieved with most probable energies of 66, 72 and 74 meV for the helium, neon and argon sources, respectively. Time-of-flight measurements showed the widths of the respective velocity distributions to be 45%, 27% and 27%.

Stopping Power Of Matter For Alpha Particles At Extreme Relativistic Energies, P.T. Leung, M. L. Rustgi, J. E. Turner

Physics Faculty Publications and Presentations

The stopping power of matter for alpha particles at extreme relativistic energies has been calculated by incorporating the charge form factor. A table is presented for aluminum, copper, and lead. It is found that at the highest energies considered, inclusion of form factor reduces the mass stopping power by about 6-8% in comparison with that predicted by Bethe's relativistic formula.

The Role Of Technological Change, Robert U. Ayres, Steven M. Miller

Research Collection School Of Computing and Information Systems

We develop an optimal growth model that includes several important new features. First, technological change is endogenously related to the growth of 'knowledge.' Investment may be directed either towards physical capital or knowledge (or both). Knowledge becomes an effective substitute for scarce resources by increasing the technical efficiency of resource utilization both for consumption and in capital. Nevertheless, a finite quantity resource must be embodied in capital and a finite flow is required for depreciation. Thus, there is an upper limit to technical efficiency and economic growth is thus ultimately limited by the availability of renewable resources. For a simple …

Methods For Biological, Chemical, And Physical Analyses In Reservoirs, Penelope E. Kellar, Sherell A. Paulson, Larry J. Paulson

Publications (WR)

This manual contains detailed descriptions of biological, chemical and physical sampling and analytical procedures used at the Lake Mead Limnological Research Center. The manual was prepared in response to requests made by numerous individuals involved in the Las Vegas Valley Water Quality Program. This manual represents what we consider to be a reasonably complete compilation of methods useful in studying both general and specific limnological questions. While each section is sufficiently detailed to be of use to investigators with little experience in limnological methodology, the methods can be used on a wide variety of lakes and reservoirs, with relatively little …

Relationship Of Gravity Anomalies To A Drift Filled Bedrock Valley System In Calhoun County Michigan, James W. Farnsworth

Masters Theses

Gravity geophysics along with well data were used to delineate and map the locations of buried river valleys in Calhoun County, Michigan. The valleys are filled with thick sequences of glacial fluvial deposits which can serve as important aquifers.

One hundred and sixty-four gravimeter observations were made at approximately one-quarter mile intervals in a 35 square mile area. Four short-interval profiles were also established perpendicular to suspected valleys. A three-dimensional trend surface polynomial was fitted to the total Bouguer anomaly to approximate the regional effect of gravity. By comparing the observed residual gravity to theoretically derived anomalies, models were developed …

Thermal Decomposition Kinetics Of Asf5-Doped Polyacetylene In Vacuum, T. Inoue, J. E. Osterholm, H. Yasuda, L. L. Levenson

Physics Faculty Research & Creative Works

Electrical conductivity measurements, mass spectra of desorbing species, and ESCA surface analysis are reported for AsF5-doped polyacetylene heated between 50 and 130°C in vacuum. All measurements indicate first-order decomposition kinetics with activation energies between 13 and 20 kcal mole-1. Decomposition leads to the desorption of AsF3 and F2. Metallic arsenic remains in the polyacetylene as a decomposition by-product.

Trends In The Theory Of Atomic Photoionization, Anthony F. Starace

Anthony F. Starace Publications

For VUV photon energies, detailed theoretical understanding of the photoionization process has been achieved for the case of a single electron ionized from one of the outer subshells of a closed-shell atom. This understanding is based qualitatively upon a few properties of realistic atomic central potentials and quantitatively upon a few distinct types of electronic interactions known generically as particle-hole interactions. Current theoretical research is mainly directed at understanding a broader class of atomic photoionization phenomena involving, e.g., open-shell atoms, electronic interactions not of the particle-hole class, real two-electron processes, and external electric and magnetic fields.

Magnetohydrodynamics In An Open Universe, Oscar Norris

Masters Theses & Specialist Projects

A study of magnetohydrodynamics (MHD) in an open universe is presented. We discuss the data and justification behind our choice of an open universe for investigation in this thesis, as opposed to the closed universe theory, which is more appealing in some ways. We explicitly define all parameters used in the analysis of magnetohydrodynamic Bianchi Type V cosmologies and outline the formulation behind them. We then proceed to present a solution to a Bianchi Type V magnetohydrodynamic cosmology with a diagonal metric. After that, the results are compared with present observations. Lastly, we conclude with an assessment of the model …

An Experiment In Discovery, Daniel J. Steck

Physics Faculty Publications

No abstract provided.

High Resolution Laser Absorption Spectroscopy Of Ozone Near 1129.4 Cm-1, Lawrence N. Majorana

Physics Theses & Dissertations

A Beer's Law experiment was performed with a tunable laser to determine self broadened line shape parameters of one infrared absorption ozone line in the v1 band for ten pressures from 0.26 to 6.29 Torr at 285K. SO₂ line positions were used for wavelength calibration. Line shapes were iteratively fitted to the Voigt function at a Doppler width of 29.54 MHz (HWHM) resulting in values for the integrated line• strength, ( S), of (0.144 +/- 0.007 ) x ·10^-20 cm-1/molecule cm-2, line center frequency, (υ_ο) of 1129.426 cm-1 and the Lorentzian contributions to half width, (α …

Sound Absorption In N2-H2O Gas Mixtures At Elevated Temperatures, Roger W. Meredith

Physics Theses & Dissertations

Sound absorption measurements were conducted in N₂ -H₂O gas mixtures at 297, 343, and 387 Kelvin to determine the location of the vibrational relaxation peak of nitrogen on the frequency/pressure, (f/P), axis as a function of humidity and temperature. At low humidities the best fit of the data is to a linear relationship between (f/P)_max and humidity (h) yields a slope of 1 .84 X 10⁴ Hz/ atm mole fraction at all three temperatures. The slope is the same as that reported by Zuckerwar and Griffin (2.00 X 10⁴ Hz/atm mole fraction) but is …

The Method Of Upper, Lower Solutions And Volterra Integral Equations, G. S. Ladde, B. G. Pachpatte, V. Lakshmikantham

Mathematics Technical Papers

In employing the method of upper and lower solutions to dynamical systems, one is required to impose a certain monotone property on the given system [5,6,11] When the given system does not possess such a monotonic property, stronger forms of upper and lower solutions have to be assumed in order to obtain similar results [4,6,9]. Furthermore, if the system enjoys a mixed monotone property the method of quasi-upper and lower solutions, which is recently introduced, is most useful [7]. In this paper we shall extend these ideas to Volterra integral equations. We want to note that Volterra integral equations and …