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The Petrology And Stratigraphy Of The Portland Hills Silt, Rodney Thomas Lentz

Dissertations and Theses

Topics in geology, which inevitably excite professional discussion and even tempered debate, often present challenging targets for the exploratory jabs of Master's degree candidates. The Portland Hills Silt and the controversy concerning its genesis provides just such an object.

Although the physical descriptions of the silt are generally in agreement, they remain somewhat generalized and, at present, no single definition is generally accepted. Moreover, incongruities concerning structural and textural details--notably, the presence of minor stratification and/or scattered pebbles in the silt--have resulted in considerable disagreement regarding its mode of origin.

Measurement Of The Difference Between The Dynamic Nmr And Static Susceptibilites Of Superfluid 3he-B Using An Rf-Biased Superconducting Quantum-Interference Device, Richard A. Webb

Faculty Publications

The temperature-dependent susceptiblity of superfluid ³He-B has been measured both statically and via a pulse technique in a field of 309 G using an rf-biased superconducting quantum-interference device (SQUID). In the pressure range 26.5 to 18 bar, the dynamic NMR susceptiblity agrees qualitatively with the theoretical weak-coupling predictions for the Balian-Werthamer state. However, the static susceptiblity, measured using the same rf-biased SQUID and detection system, is significantly smaller thatn the dynamic susceptibility.

Infrared Observations Of Hii Regions And Comet West, Paul A. Heckert

Physics & Astronomy ETDs

In Chapter 1, I outline the methods of making ground-based infrared observations. I concentrate on the observational procedures rather than the instrumental design. Near-infrared observations of S 156A, _S 158A, S 159A, S 162A₁, S 228, and G 45. 5 + 0 .1 (#2) made with a beam size of ̴1 are used to estimate the total near infrared flux. After correcting for the line of sight extinction the near infrared luminosities are greater than the Lyman-α luminosities inferred from radio observations. A strong double peaked infrared source was discovered near the region of G 25.3-0.1. The infrared …

Charge Transfer Photochemistry Of Some Chromium (Iii) Complexes, Yohn Sik Kang

Chemistry and Chemical Biology ETDs

The photolyses of a series of chromium(III) complexes Cr(en)3 3+, Cr(den)2 3+, Cr(tn)3 3+, and Cr(pn)3 3+, where en= ethylenediamine, den= diethylenetriamine, tn = trimethylenediamine, and pn = propylenediamine, have been investigated. Experiments were carried out on unbuffered and buffered (pH= 2.00) solutions containing 10^-3 – 10^-2 M chromium(III) complexes at room temperature and 10°C. While purging with argon or oxygen, the irradiation was performed with 184.9-253.7 nm u.v. light, corresponding to the charge transfer bands of the complex.

Efficiency In Estimation Of Mean Time To Failure In A Two-Parameter Exponential Failure Model, Danny D. Dyer

Mathematics Technical Papers - Archive

When comparing two point estimators of some parametric function, Pitman-closeness efficiency gives the "odds" in favor of one of the estimators being closer to the true value than is the other in a given situation. Through this measure of efficiency, we compare (i) the maximum likelihood estimator, (ii) the minimum variance unbiased estimator, (iii) the best invariant estimator, and (iv) the median unbiased estimator of the mean time to failure in a two-parameter exponential failure model. Mean squared efficiency is also discussed.

Efficiency Contours For Estimators Of Reliability In A 2-Parameter Exponential Failure Model, I-Le Lu, Danny D. Dyer

Mathematics Technical Papers - Archive

When there are available several point estimators of some parametric function, it would seem desirable to make a comparison among the estimators based on some measure of closeness to the true value. Along these lines, the concept of Pitman-closeness (PC) efficiency is introduced. Essentially, when comparing two estimators, PC efficiency gives the odds in favor of one of the estimators being closer to the true value in a given situation than is the other. The traditional method of comparison, i.e., mean squared (MS) efficiency is also considered. This paper presents graphical results based on simulation techniques which depict PC efficiencies …

Differential Inequalities And Flow-Invariance Via Linear Functionals, V. Lakshmikantham, Jerome Eisenfeld

Mathematics Technical Papers - Archive

This paper deals with flow-invariance properties with respect to [see pdf for notation] and resulting comparison inequalities. Both the order relation He and the regularity conditions on x are defined, in a general manner, in terms of a specified set of linear functionals, S. This permits greater flexibility for applications e.g., a proper choice of S gives the PDE operators of the form [see pdf for notation] where [see pdf for notation], an appropriate quasimonotonicity property.

Infinitely Many Perfect And Unitary Perfect Polynomials Over Some Gf(Q), Mickie Sue Harbin, A.T. Bullock, Jacob T. B. Beard Jr.

Mathematics Technical Papers - Archive

The existence is shown of infinitely many non-splitting perfect polynomials over GF(2d), GF(3d), GF(5d) for each odd integer d > 1, and over GF(2d) for each (even) integer d 1 0 (mod 3). Stronger results show that each unitary perfect polynomial over GF(q) determines an infinite equivalence class of unitary perfect polynomials over GF(q). The number SUP(q) of distinct equivalence classes of splitting unitary perfect polynomials over GF(q) is calculated for q = p and shown to be infinite for q # p. The number NSUP(q) of distinct equivalence classes of non-splitting unitary perfect polynomials over GF(q) remains undetermined, but is …

Magic Gems, Minerals, And Fossils, Mary Margaret Murphy, H. Allen Curran

Geosciences: Faculty Publications

No abstract provided.

System Identification Problems And The Method Of Moments, Jerome Eisenfeld, S. W. Cheng, Stephen R. Bernfeld

Mathematics Technical Papers - Archive

Let X(t) and W(t) be vectors of dimension N > 0. We are concerned with the problem of computing an N x N matrix A such that [see pdf for notation](1.1) where X'(t) is the rate of change of X(t) with respect to time t. Such problems frequently arise in the biosciences although it is not always immediately evident that they may be posed in the form of Eq. (1.1). In applications the data for X(t) and W(t) is obtained from experiments and the collection of such data is not always performed over equal time intervals nor is it always the …

Linear Algebraic Computational Procedures For System Identification Problems, Jerome Eisenfeld, B. Soni

Mathematics Technical Papers - Archive

An algorithm is presented for identifying exponentials sums [see pdf for notation] from discrete data [see pdf for notation] The algorithm determines the number of components, [see pdf for notation] the rate constants [see pdf for notation] and the amplitudes [see pdf for notation]. The method is based on the method of moments as it is applied to analyze fluorescence decay experiments. However the present method is more general. It permits greater flexibility in weighting the data and, in particular, alleviates the "cut-off error" incurred when integration is required to infinite time.

Existence And Comparison Results For Nonlinear Volterra Integral Equations In A Banach Space, Randy Vaughn

Mathematics Technical Papers - Archive

In this paper we prove the existence of solutions to nonlinear Volterra integral equations in a Banach Space. A comparison theorem and the existence of maximal solutions are also obtained using the notion of ordering with respect to a cone. As is known, in infinite dimensional Banach spaces compactness-type conditions are needed to prove existence, whereas in finite dimensional cases these assumptions are not necessary. The results of the paper generalize the corresponding results of Nohel [6]. See also Miller [5] and Lakshmikantham and Leela [2]. Throughout this paper, E will denote a Banach space, and [to,to + a] = …

Existence And Uniqueness Of Solutions Of Delay Differential Equations On A Closed Subset Of A Banach Space, V. Moauro, S. Leela, V. Lakshmikantham

Mathematics Technical Papers - Archive

In an earlier work [5], sufficient conditions for the existence of solutions in a closed subset F of a Banach space E for the Cauchy problem (1.1) [see pdf for notation] where [see pdf for notation], are obtained by requiring f to satisfy (i) a compactness-type condition in terms of the Kuratowski measure of noncompactness and (ii) a boundary condition, namely, (1.2) [see pdf for notation] for every [see pdf for notation]. In this paper, we wish to explore the other direction followed in the study of the Cauchy problem for differential equations in a Banach space [4,6,7], that is, …

Relationship Between Some Demographic Characteristics And Adverse Reactions Experienced By Women Undergoing A Therapeutic Abortion While Awake, Karen K. House

Loma Linda University Electronic Theses, Dissertations & Projects

With the liberalization of abortion laws by the Supreme Court in 1973, American women have been able to obtain therapeutic abortions in hospitals and out-patient clinics in ever increasing numbers. With the increased number of women seeking abortions the medical field has responded with abortion procedures that are safe and relatively quick. With the speed doctors use to perform the procedure, many women may wish to take advantage of the medically safer method of abortion under local anesthesia. However, some women are unable to withstand the psychological and physical stress associated with a therapeutic abortion while awake. It would be …

Community Health Nurse Influence On Retiree Health Planning, Patricia Hora

Loma Linda University Electronic Theses, Dissertations & Projects

The number and percent of the population over the age of 60 in the United States is increasing. The majority of these people (96%) are functioning in their own homes (Shanas, 1965). Physical health is important to the enjoyment and utilization of the added years of life. Therefore it seems important to find ways to meet the older citizen before the time of illness and help him/her to develop health goals and plans that will facilitate an optimal level of functioning and improve the quality of life.

The purpose of this study was to describe a method of intervening at …

Chromium(Iii) Tartrates, Gerald Lynn Robbins

Chemistry and Chemical Biology ETDs

The binuclear tartrate-bridged complexes [Cr₂ (tartH)₂ (L)₂] and Na[Cr₂ (tart) (tartH) (L)₂]("tart" = C₄H₂O₆^4-, "tartH" = C₄H₃O₆^3- and "L"= 1,10-phenanthroline or 2,2'-bipyridyl) have been synthesized where each complex contains either two optically active or two meso bridging ligands. A discussion of the number of isomers and symmetries of these complexes is presented, as well as a complete description of the syntheses of the complexes and their sodium salts. Steric constraints force the octahedral coordination geometry for the dimer containing two …

Surface Area Measurements And Seasonal Variation Of Selected New Mexico Lakes, Mike Edwin White

Geography ETDs

This research compares the ability of various areal measuring techniques to accurately measure reservoir surface area from Landsat imagery. Water volume and surface area data obtained from reservoir management agencies for six New Mexico reservoirs were used as test data. Acreage estimates obtained from a dot grid, an electronic planimeter, a 32-level color density slicer and a 16-level black and white density slicer, were compared to the test data. Surface area measurements were taken from Landsat infrared images by these devices at scales of 1:1,000,000, 1:500,000 and 1:250,000. The acreage estimates were obtained for four seasons during 1973. The results …

An Analysis Of The Fresh Water Shell Recovered From Langlier Rock Shelter, Mary Reilly

Senior Honors Papers / Undergraduate Theses

No abstract provided.

The Limnetic Zooplankton Community Of Boulder Basin, Lake Mead In Relation To The Metalimnetic Oxygen Minimum, Thomas A. Burke

Publications (WR)

The limnetic zooplankton community of Boulder Basin, Lake Mead, was examined to determine the role of this community in the development of a metalimnetic oxygen minimum which regularly occurs in the lake. Analysis of the community from May 1975 to April 1976 revealed that zooplankton maintain high populations within the metalimnion during summer stratification. The species composition of the community changes noticeably during the summer, but due to advanced stages excysting from resting forms, a complete assemblage of individuals are found throughout the 74 day period studied. Thermal stratification was weak, covering a 30 meter metalimnion. Eddy currents powered by …

The Dependence Of The Apparent Pk Of Ion Exchange Celluloses Of Ionic Strength, Paul Cyril Gillespie

Theses and Dissertations

Diethylaminoethyl cellulose was titrated with acid and base in various concentrations of NaCl. The pK values were determined from titration curves using a graphical technique. Two titratable groups were observed from the acid titration curve, a major and a minor group. The minor group, which represented 20% of the acid titration, was barely detectable in the base titration curve and had a salt-independent pK of 6.0. The pK of the major group was strongly salt-dependent and was approximately a linear function of log N NaCl. An equilibrium shift caused by the counter ion may explain the salt dependence. Hydrogen bonding …

A Quantitative Connection Between Computer Programs And Technical Prose, M. H. Halstead

Department of Computer Science Technical Reports

No abstract provided.

The Effect Of Numerical Integration In The Finite Element Approximation Of Hyperbolic Problems, Elias N. Houstis

Department of Computer Science Technical Reports

No abstract provided.

Isolation, Purification, Scanning Electron Microscopy And Bacterial Dna Uptake Of Plant Protoplasts, Bronwyn G. Hughes

Theses and Dissertations

Protoplasts were isolated from tobacco and barley leaves in sucrose or mannitol using commercially available cellulases and macerozymes. Barley growth and protoplast isolation and purification conditions were optimized so that protoplasts were obtained in high yields free of unwanted debris and organelles. A technique for processing barley and tobacco protoplasts for examination by scanning electron microscopy was developed in which protoplasts seem to have maintained their structural integrity. Barley and tobacco protoplasts took up 3H-B. subtilis DNA, 125I-B. subtilis DNA or 125I-M. luteus DNA as a linear function of time (0-6 hr) and DNA concentration (0-200 μg/ml). Up to 16 …

Environmental Perception In Bandelier National Monument, New Mexico, Howard Graham Crow Ii

Geography ETDs

The focus of this study was on visitor satisfac­tion in a natural area, as opposed to alternative use such as preservation of the area, with little or no visitor access. Visitor satisfaction can be approached through studies in environmental perception. Such studies integrate work in psychology, philosophy, and geography. This author sought to determine whether or not more precise information about the perceptual basis for visitor satisfaction in a natural area could be obtained through survey research. Bandelier National Monument served as a useful laboratory for carrying out this research.

Data collection was by a survey technique. A detailed questionnaire …

A Model For The Composition Of Venus, Janet Shields

Senior Honors Papers / Undergraduate Theses

No abstract provided.

Recent Shallowwater Ostracods From The Northern Atlantic Coast, Randy J. Mersky

Senior Honors Papers / Undergraduate Theses

No abstract provided.

Theoretical Studies Of Nucleic Acid Sugar Ring Analogs, Ali-Reza Hashemi-Attar

Physics & Astronomy ETDs

Extended Hueckel theory (EHT) was used to study analogs of sugar rings in nucleic acid monomers. The energy gradient in a variable metric algorithm was used to find the potential energy along the pseudorotation path. Use of the energy gradient made it possible to permit 34 degrees of freedom in a molecule. Seven molecules and their isomers were studied. These were: 3-hydroxy2-methyl tetrahydrofuran, 2-ami no-4-hydroxytetrahydrofiJran, 5-ami no3-hydroxy-2-methyltetrahydrofuran (deoxyribonucleic acid analog), 3,4-dihydroxy-2-methyltetrahydrofuran, 2-amino-3,4-dihydroxytetrahydrofuran, 2-amino-5-methyltetrahydrofuran, and 2-amino-3,4-dihydroxy-5-methyltetrahydrofuran (ribonucleic acid analog).

It was shown that the difference in sum of total overlap populations (TOP) for all pairs of atoms between two related conformations …

Dual-Mode Sequential Logic For Function Independent Fault-Testing, Sumit Dasgupta, Carlos R.P. Hartmann, Luther D. Rudolph

Electrical Engineering and Computer Science - Technical Reports

This paper presents a method of using hardware redundancy to ease the problem of fault testing in sequential logic networks. Sequential logic networks are constructed using two kinds of dual-mode logic gates, one of which is specifically required to initialize a feedback loop to some logic value. Initially, it is shown that these networks can be tested for all single stuck-at-faults with six function-independent tests. Next, this method is generalized to detect large classes of multiple faults with six function-independent tests. In both cases, the network must have the proper number of extra inputs.

Existence Of Solutions Of Boundary Value Problems For Nonlinear Second Order Systems In A Banach Space, A. Richard Mitchell, V. Chandra

Mathematics Technical Papers - Archive

This paper is concerned with the existence of solutions of boundary value problems (BVP, for short) for nonlinear second order ordinary differential equations of the type (1.1) [see pdf for notation] (1.2) [see pdf for notation] where [see pdf for notation] is a real Banach space. In case [see pdf for notation], existence was proved by first obtaining a priori bounds for [see pdf for notation] of a solution of (1.1) and (1.2) and then employing a theorem of Scorza-Dragoni [3,7,16]. The methods involve assuming inequalities in terms of the second derivative of Lyapunov-like functions relative to H, using comparison …

On The Existence Of Weak Solutions Of Differential Equations In Nonreflexive Banach Spaces, V. Lakshmikantham, Evin Bronson, A. Richard Mitchell

Mathematics Technical Papers - Archive

The study of the Cauchy problem for differential equations in a Banach space relative to the strong topology has attracted much attention in recent years [2,4,5,7]. This study has taken two different directions. One direction is to impose compactness type conditions that guarantee only existence and the corresponding results are extensions of the classical Peano's Theorem. The other approach is to utilize dissipative type conditions that assure existence and uniqueness of solutions, and the corresponding results are extensions of the classical Picard's Theorem. However, a similar study of the Cauchy problem in a Banach space relative to the weak topology …