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Eruption Dynamics And Petrology Of The Most Recent Eruptions Of Nevado Del Ruiz Volcano, Colombia, South America, Richard Henry Young

LSU Historical Dissertations and Theses

Field measurements and petrographic analyses of pumices from the most recent tephra deposits of Nevado del Ruiz volcano provide a context in which to view the disastrous eruption of 13 November, 1985 (R0). The pumices are all crystal-rich, two-pyroxene andesites to dacites with whole rock SiO₂ contents of 62 - 66 wt.%, and magma water contents estimated to be between 1 - 4 wt.%. The 1985 tephra has greater petrologic diversity than earlier deposits which may be related to an input of a hotter, more basic magma into the Ruiz system, as suggested by xenocrystic olivine which is most …

Detecting The Obese Higgs —> Z° + Z° Decay At The Ssc, Using A Simple Detector Simulation, Gregory Griffin

Honors Capstones

No abstract provided.

On The Computation Of Bang-Bang Controls, Carol San Soucie

Honors Capstones

No abstract provided.

Epimorphisms Of Frames, James J. Madden, Andrew Molitor

Faculty Publications

No abstract provided.

Some Results On Minors For Graphs And Matroids., Lawrence Alan Wargo

LSU Historical Dissertations and Theses

This dissertation solves some problems relating to the theory of graphs. The first type of problem considered concerns the structure of various classes of graphs which arise naturally from outerplanar graphs. These problems are motivated by Chartrand and Harary's well-known characterization of outerplanar graphs. This theorem states that K$\sb4$ and K$\sb{2,3}$ are the only non-outerplanar graphs for which both G$\\$e, the deletion of the edge e from the graph G, and G/e, the contraction of the edge e, are outerplanar for all edges e of G. Following Gubser's characterization of almost-planar graphs, we begin our study of graphs related to …

Glyconeogenesis From Alanine By Diaphragm Muscle, Stephanie A. Mills

Honors Capstones

No abstract provided.

Comparative Inflorescence And Floral Development In The Asteraceae. (Volumes I And Ii)., Elizabeth M. Harris

LSU Historical Dissertations and Theses

Floral and inflorescence development of 39 species of Asteraceae and four additional species representing possible outgroups were examined with the scanning electron microscope (SEM). Taxon choice was designed to include representatives of 12 of the 12 to 18 tribes recognized in the large, morphologically diverse family. Although floral ontogeny has provided phylogenetically useful characters in other plant groups, no similar studies have been applied to solve phylogenetic problems in the Asteraceae. The necessary live material was collected in several ways: from natural populations throughout North America, from the worldwide collections of several botanical gardens, grown from seed, or from cultivated …

A Study Of The Effects Of Prediction Activities On Instructional Outcomes In High School Genetics., Anne Spratlan Sinclair

LSU Historical Dissertations and Theses

The purpose of this study was to examine the instructional effects of incorporating prediction activities in a high school biology genetics curriculum. Criteria for instructional effectiveness included enhanced levels of classroom discussion and interaction, improved subject-related attitude, higher achievement motivation, and greater mastery of genetics concepts. Genetics was chosen as the domain of research because of the multiple variables operating which make it amenable to the making of predictions. Four experienced high school biology teachers taught an experimental and a control class. Students in the experimental classes made written predictions using researcher-developed prediction activities as an introduction to 19 genetics …

Student Thought Processes And Quality Of Practice During Motor Skill Instruction., Melinda Ann Solmon

LSU Historical Dissertations and Theses

The focus of this study was the examination of relationships between initial skill level, observer estimates of attention, student thoughts, quality of practice, and achievement during motor skill instruction. Specifically, the following questions were addressed: (1) What is the relationship between observed student behavior to quality of practice and achievement? (2) What is the relationship between student reports of their cognitive processes to quality of practice and achievement? (3) Does written self-report data produce the same information as data collected during stimulated recall interviews? and (4) Are student self-report data about attention consistent with observer estimates of overt student behavior? …

Consistency And Stability For Linear Finite Difference Approximations, Cabe W. Chadick

Honors Capstones

No abstract provided.

Prewriting, Drafting, And Revision In Large Scale Writing Assessment. (Volumes I And Ii)., Arthur Marshall Halbrook

LSU Historical Dissertations and Theses

The purpose of this study was to examine prewriting, drafting, and revision in a large scale writing assessment. In April 1989, Louisiana administered a graduation exit examination. Written composition comprised one of the three testing components. From the 40,000 tenth grade students who participated in the written composition test, a stratified sampling of 1,467 was selected for this study. Using a research design incorporating both quantitative and qualitative assessment procedures, the study examined prewriting, drafting, and revision practices at two levels. In Level I, the first and final drafts of the 1,467 students were analyzed using a scoring model derived …

Louisiana Principals' Perceptions Of Nontraditional Vocational Teachers And The Importance Of Vocational Education., Moo Yul Huh

LSU Historical Dissertations and Theses

Even though the elimination of sex bias and stereotyping has been a national priority in vocational education for a number of years, many educators or administrators still hold sex biased and stereotyped attitudes about labor force participation and have a belief that there are "men's" and "women's" jobs. A study of sources affecting sex bias and sex stereotyping of vocational teachers is critical to provide more productive programs. The local school principal typically has the greatest impact on school level employment decisions because the principal is the chief executive officer or administrator of the basic unit in the school system. …

Valuation Of Firm-Bank Relationships: A Test Of The Delegated Monitoring Hypothesis., Shane Alan Johnson

LSU Historical Dissertations and Theses

In this thesis, we test the hypothesis that banks provide monitoring services that benefit client firm shareholders. We argue that if the value of firm-bank relationships stems from monitoring services provided by banks, then share price responses associated with announcements of bank loans should be cross-sectionally related to variables that proxy the degree of monitoring to which firms are already subject. Our sample differs from previous studies of bank debt announcements in two key aspects: inclusion of NASDAQ firms, and inclusion of announcements carried by the newswire but not the Wall Street Journal. Consistent with suggestions by Fama (1985) and …

Picosecond Pump-Probe Raman Spectroscopy Of Excited States And Relaxation Phenomena In The Condensed Phase., Robert Lingle Jr

LSU Historical Dissertations and Theses

This dissertation describes the development and application of pump-probe Raman spectroscopy using 8 ps laser pulses as a technique for the study of relaxation phenomena in the condensed phase. I show three examples of systems studied by this technique. First, the dissipation of the heat deposited in the cage of solvent molecules surrounding a photodissociated diatomic solute is directly measured in the solvent Raman spectrum. Second, we provide a full characterization of the excited $A\sp\prime$ state of iodine which is formed in solution following photodissociation. This work discusses the solvent dependence of the iodine atom recombination process and points toward …

New Techniques In Scene Understanding And Parallel Image Processing., Krishnakumar Narayanan

LSU Historical Dissertations and Theses

There has been tremendous research interest in the areas of computer and robotic vision. Scene understanding and parallel image processing are important paradigms in computer vision. New techniques are presented to solve some of the problems in these paradigms. Automatic interpretation of features in a natural scene is the focus of the first part of the dissertation. The proposed interpretation technique consists of a context dependent feature labeling algorithm using non linear probabilistic relaxation, and an expert system. Traditionally, the output of the labeling is analyzed, and then recognized by a high level interpreter. In this new approach, the knowledge …

Modeling Nonlinear Dynamics In Nasdaq Stock Returns., Salil Kumar Sarkar

LSU Historical Dissertations and Theses

This dissertation investigates the nonlinear dynamics of the returns generation process of individual stocks listed on national market system from national association of security dealers automated quotation system (NASDAQ/NMS) and compares them to a similar sample from New York Stock Exchange (NYSE). One of the most prominent tools that has emerged for characterizing nonlinear processes is the Autoregressive Conditional Heteroscedasticity (ARCH) model, and its various extensions, the most significant being the Generalized Autoregressive Conditional Heteroscedasticity (GARCH) model. From the stocks listed on the Center for Research in Security Prices (CRSP) tapes, a group of NASDAQ/NMS and NYSE stocks are chosen …

Parallel And Distributed Algorithms For A Class Of Graph-Related Computational Problems., Rajanarayanan Subbiah

LSU Historical Dissertations and Theses

There exist at least two models of parallel computing, namely, shared-memory and message-passing. This research addresses problems in both these types of systems, and proposes efficient parallel (Shared-Memory Model) and distributed (message-passing) algorithms for a variety of graph related computational problems. In part I, we design algorithms for three generic problems in distributed systems: set manipulation, network structure recognition and facility placement. We present optimal distributed algorithms for recognizing rectangular-mesh networks. The time and message complexity of our algorithm is linear in the number of nodes in the network. We also lay the foundation for the recognition of 2-reducible, outer-planar …

The Clan Of Toil: Piney Woods Labor Relations In The Trans-Mississippi South, 1880-1920. (Volumes I-Iii)., John Reed Tarver

LSU Historical Dissertations and Theses

Lumber boomed in the Reconstructed South, an industrial binge that, by 1920, changed the landscape, first removing the forest then replacing its subsistence economy with consumerism. Men with money made fortunes in lumber. West of the Mississippi and south of the Missouri, it became a bonanza by 1880. Within these boundaries, black and white farmers and field hands sought "public work" in sawmills and log fronts. Most were unskilled. Steam power changed their lives, although all did not respond alike. They kept their folk ways, consistent with the new industry, despite their bondage to machines. Although most workers voluntarily entered …

Modern Algebra And Discrete Structures, R. F. Lax

E-Textbooks

This text is intended for either an applied algebra course or a modern algebra course that includes more applications than has been traditional. It is at an advanced undergraduate (junior-senior) level and is suitable for a one-semester or two-quarter course. We assume that students have already had a course in linear algebra (although we briefly review concepts from linear algebra when they are needed in the sections on fields and linear codes).

Our treatment is fairly rigorous, with almost every proof supplied. However, we have tried to concentrate on examples and applications. In an applied algebra course, which usually consists …

Three-Dimensional Modeling Of Reaction Injection Molding., Yu-Wen Lo

LSU Historical Dissertations and Theses

Since increasing more complex RIM molds are being used in industry, the goal of this research is to develop a model which can be used to predict the dynamic filling front, hot spots, and air entrapment in molds. In this research a method to simulate the RIM process by considering both the filling and curing stages in variously shaped molds for unsteady state three dimensional state cases was developed. This model can be used to predict not only the temperature and conversion changes with time but also the front position changing as a function time. Using given physical and chemical …

A Characterization Of White Noise Test Functionals, H. H. Kuo, J. Potthoff, L. Streit

Faculty Publications

No abstract provided.

Attainable Sets And One-Parameter Semigroups Of Sets, I. Chon, J. D. Lawson

Faculty Publications

No abstract provided.

Some Extremal Connectivity Results For Matroids, Safwan Akkari, James Oxley

Faculty Publications

Let n be an integer exceeding one and M be a matroid having at least n + 2 elements. In this paper, we prove that every n-element subset X of E(M) is in an (n + 1)-element circuit if and only if (i) for every such subset, M X is disconnected, and (ii) for every subset Y with at most n elements, M Y is connected. Various extensions and consequences of this result are also derived including characterizations in terms of connectivity of the 4-point line and of Murty's Sylvester matroids. The former is a result of Seymour. © 1991.

Lsu General Catalog 1991-1992, Louisiana State University And Agricultural And Mechanical College

LSU General Catalog

The LSU General Catalog describes all undergraduate and graduate departments and programs with degree requirements and courses offered for each one. The General Catalog includes information on registration and financial aid as well as academic services offered to all students.

D-Harmonic Distributions And Global Hypoellipticity On Nilmanifolds, Jacek M. Cygan, Leonard F. Richardson

Faculty Publications

Let M = Γ\N be a compact nilmanifold. A system of differential operators D1, …, Dk on M is globally hypoelliptic (GH) if when D1f = g1,…, Dkf=gk with f ∈ D’ (M), g1, …, gk ∈ C∞ (M) then f ∈ C∞ (M). Let X1, …, Xk be real vector fields on M induced by the Lie algebra N of N. We study the relationships between (GH) of the system X1, …, Xk on M, (GH) of the operator D = X12 + … + Xk2, the constancy of D-harmonic distributions on M, and related algebraic conditions on X1, …

Distributional Solutions Of The Wiener-Hopf Integral And Integro-Differential Equations, R. Estrada, R. P. Kanwal

Faculty Publications

We present the theory and technique for obtaining the distributional solutions for the Wiener-Hopf integral and integro-differential equations. This is achieved by identifying a class of kernels for which these equations are well defined and are of the Fredholm type. Consequently, the associated operators and their images are of finite dimensions. Furthermore, we define the operators in such a way that the corresponding equations hold at the end points; otherwise, the equations are usually ill-behaved. We illustrate our analysis with the help of various examples. © 1991, Rocky Mountain Mathematics Consortium. All Rights Reserved.

Preservice Teachers' Evolving Perspectives Of Elementary Social Studies., Elizabeth K. Wilson

LSU Historical Dissertations and Theses

Recent studies which have focused on preservice teachers' perspectives of elementary social studies have attempted to discover the product of the relationships between their conceptions of social studies and their classroom practices. This research, conducted only during the clinical experience, indicated that the beliefs and ideas which teachers express about social studies have little effect on classroom practice. In order to better understand this phenomenon, this study investigated the evolution of preservice teachers' perspectives of social studies through methods instruction as well as the clinical experience. The participants for this study were four preservice teachers who were enrolled in the …

Remedial English Ten Years After: Former Basic Writers In The Workplace., Eleanor Agnew

LSU Historical Dissertations and Theses

The purpose of this study was to find out whether writing skills were a handicap to job success for former basic writers who had graduated from college. A population of 197 former basic writers (FBW's) and 68 former strong writers (FSW's, used as a comparison) were surveyed and interviewed. Research questions included (1) What types of jobs do FBW's have, compared to FSW's, and how much do their feelings about writing affect their choices of major or job? (2) How much and how often do FBW's write at work compared to FSW's? (3) What forms of writing do FBW's do …

A Blackboard Architecture For The Integration Of Manufacturing Systems., Calvin Michael Collins

LSU Historical Dissertations and Theses

American companies engaged in manufacturing are in the midst of adjusting to the increasingly stiff foreign competition as they attempt to satisfy the demands of expanding markets. U.S. manufacturing must continue the movement toward leaner, more streamlined production if they are to survive with the new market realities. Computerizing different aspects in the accounting, production, planning, and marketing divisions, has been central in the quest for higher productivity for four decades. Research is now centering on the integration of these systems and the goal is to integrate the accounting, planning and marketing functions of the organization with the automated manufacturing …

A Syntactic Language Computer Analysis Of Depressed Versus Non-Depressed Females., Daniel Merton Christy

LSU Historical Dissertations and Theses

This study sought to examine the interrelationship of cognition and language in the clinical syndrome of depression. It was proposed that the types of cognitive differences in depression proposed by Beck and other cognitive theorists would be reflected in language usage, and especially in syntax. Using the Beck Depression Inventory (BDI), subjects were classified as either depressed (BDI $\geq$ 16) or non-depressed (BDI $\leq$ 4). Subjects were asked to speak into a tape recorder for 3-5 minutes on each of three stimuli, a positive event, a negative event, and a neutral opinion stimulus. The language samples were then analyzed using …