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Articles 8881 - 8910 of 9858
Full-Text Articles in Entire DC Network
Xps Characterization Of Supported Iron/Ruthenium Carbon Monoxide Hydrogenation Catalyst Systems., Jeffry T. Donner
Xps Characterization Of Supported Iron/Ruthenium Carbon Monoxide Hydrogenation Catalyst Systems., Jeffry T. Donner
LSU Historical Dissertations and Theses
Literature in the field of catalysis is dominated by details of catalytic reactions, operating conditions, and product streams, with little regard for detailed physical characterization of the catalyst materials. It is now understood that knowledge of catalyst properties as a function of reaction properties may lead to the design of more active and/or selective catalysts. Thus, studies in the catalysis field are changing and the present investigation demonstrates the utility of an X-ray photelectron spectroscopic (XPS) characterization of supported iron, ruthenium, and iron-ruthenium bimetallic catalyst systems as a function of catalyst treatment(s). This physical and chemical information of the catalysts …
Biological, Ecological, And Morphological Investigations Of The Rice Water Weevil, Lissorhoptrus Oryzophilus Kuschel, On Two Rice Genotypes., Gary Leonard Cave
Biological, Ecological, And Morphological Investigations Of The Rice Water Weevil, Lissorhoptrus Oryzophilus Kuschel, On Two Rice Genotypes., Gary Leonard Cave
LSU Historical Dissertations and Theses
The rice water weevil, Lissorhoptrus oryzophilus Kuschel, is the most important insect pest of rice, Oryza sativa (L.), in the United States. Although this insect has been associated with O. sativa since the introduction of this plant species into the United States in 1685, some aspects of its biology remain obscure. Larvae of L. oryzophilus have four instars, based on measurements of head-capsule widths of field-collected larvae in 1981 and 1982. The head-capsule widths of each instar were: I, 0.14 to 0.18 mm; II, 0.20 to 0.26 mm; III, 0.28 to 0.38 mm; IV, 0.40 to 0.60 mm. Further studies …
Scs 75: Distributive Semilattices, Heyting Algebras, And V-Homomorphisms, Hans Dobbertin
Scs 75: Distributive Semilattices, Heyting Algebras, And V-Homomorphisms, Hans Dobbertin
Seminar on Continuity in Semilattices
Source: University archive of the Technische Universität Darmstadt.
Scs 74: Distributive Semilattices, Hans Dobbertin
Scs 74: Distributive Semilattices, Hans Dobbertin
Seminar on Continuity in Semilattices
No abstract provided.
Scs 73: Meet-Continuous Lattices In Which Meet Is Not Continuous, Marcel Erné, Hartmut Gatzke
Scs 73: Meet-Continuous Lattices In Which Meet Is Not Continuous, Marcel Erné, Hartmut Gatzke
Seminar on Continuity in Semilattices
Source: University archive of the Technische Universität Darmstadt.
Scs 72: Algebraic Posets And Compactly Generated Posets, Marcel Erné
Scs 72: Algebraic Posets And Compactly Generated Posets, Marcel Erné
Seminar on Continuity in Semilattices
Source: University archive of the Technische Universität Darmstadt.
Scs 71: Two Remarkable Continuous Posets And An Appendix To "The Cl-Compactification And The Injective Hull Of A Continuous Poset", Rudolf-Eberhard Hoffmann
Scs 71: Two Remarkable Continuous Posets And An Appendix To "The Cl-Compactification And The Injective Hull Of A Continuous Poset", Rudolf-Eberhard Hoffmann
Seminar on Continuity in Semilattices
No abstract provided.
Scs 70: Freedom For Completely Distributive Lattices (Over Continuous Posets), Marcel Erné
Scs 70: Freedom For Completely Distributive Lattices (Over Continuous Posets), Marcel Erné
Seminar on Continuity in Semilattices
No abstract provided.
Scs 69: Order Generation And Distributive Laws In Complete Lattices, Marcel Erné
Scs 69: Order Generation And Distributive Laws In Complete Lattices, Marcel Erné
Seminar on Continuity in Semilattices
No abstract provided.
Scs 68: A Remark On The Complete Distributivity Of Algebraic Lattices, Karl Heinrich Hofmann
Scs 68: A Remark On The Complete Distributivity Of Algebraic Lattices, Karl Heinrich Hofmann
Seminar on Continuity in Semilattices
No abstract provided.
Scs 67: A Strict Extension Of Previous Results On Essential Extensions, Jimmie D. Lawson
Scs 67: A Strict Extension Of Previous Results On Essential Extensions, Jimmie D. Lawson
Seminar on Continuity in Semilattices
No abstract provided.
Scs 65: Bernhardina (The Essential Hull Revisited), Karl Heinrich Hofmann
Scs 65: Bernhardina (The Essential Hull Revisited), Karl Heinrich Hofmann
Seminar on Continuity in Semilattices
No abstract provided.
Scs 64: A Continuous Poset Whose Compactification Is Not A Continuous Poset. The Square Is The Injective Hull Of A Discontinuous Cl-Compact Poset, Karl Heinrich Hofmann, Michael Mislove
Scs 64: A Continuous Poset Whose Compactification Is Not A Continuous Poset. The Square Is The Injective Hull Of A Discontinuous Cl-Compact Poset, Karl Heinrich Hofmann, Michael Mislove
Seminar on Continuity in Semilattices
No abstract provided.
Scs 63: The Fell Compactification, Rudolf-Eberhard Hoffmann
Scs 63: The Fell Compactification, Rudolf-Eberhard Hoffmann
Seminar on Continuity in Semilattices
No abstract provided.
Convexities, Jimmie D. Lawson
Convexities, Jimmie D. Lawson
Seminar on Continuity in Semilattices
No abstract provided.
Correlative Field And Laboratory Microcosm Approaches In Ascertaining Xenobiotic Effect And Fate In Diverse Aquatic Microenvironments., Ralph Joseph Portier
Correlative Field And Laboratory Microcosm Approaches In Ascertaining Xenobiotic Effect And Fate In Diverse Aquatic Microenvironments., Ralph Joseph Portier
LSU Historical Dissertations and Theses
The impact of a multitude of toxic chemicals, or xenobiotics, on diverse aquatic environments and the need to consider such factors in adjacent land use and disposal situations has necessitated the development of usable analytical predictive approaches. A microbial and enzymatic assessment protocol for determining the environmental effect and fate of these manufactured chemicals in coastal wetlands was devised. The protocol combined in situ analyses of interrelated soil/sediment microenvironments with statistical and analytical laboratory microcosm approaches in presenting valid predictive models of xenobiotic fate and effect. The general objective of this combined field/laboratory analysis was to provide a better understanding …
The Coupling Of Monte Carlo Integration With The Boundary Integral Equation Technique To Solve Poisson Type Equations., Gary Steven Gipson
The Coupling Of Monte Carlo Integration With The Boundary Integral Equation Technique To Solve Poisson Type Equations., Gary Steven Gipson
LSU Historical Dissertations and Theses
The primary topic of this work is a method for dealing with boundary element formulations of nonhomogeneous terms in Poisson type equations. A concise presentation of boundary integral techniques and the corresponding fundamental solutions plays an important role in this development. Using Monte Carlo quadrature theory, an algorithm for the construction of a two-dimensional BEM Poisson equation analyzer is derived. A FORTRAN program based upon this algorithm is presented as a novel device that solves the general Poisson equation in two-dimensional and axisymmetric geometries without domain discretization. In the axisymmetric case, Monte Carlo integration is also used to effectively compute …
Math Attitude In Terms Of Various Factors., Jerry Elizabeth Pinsel
Math Attitude In Terms Of Various Factors., Jerry Elizabeth Pinsel
LSU Historical Dissertations and Theses
This study examined the degree to which math attitude relates to the mathematical training, major field of study and career choices of undergraduate males and females. The study took place in the Mathematics Department of Southeastern Louisiana University. Statement of the Problem. The following null hypothesis was tested using the .05 level of significance: no significant degree of relationship exists between math attitude and either the mathematical training, major field of study, or career choices of undergraduate male and female students. Procedure. Students who participated in the study were undergraduate students enrolled in mathematics during the Fall Semester of 1981. …
Schizophrenia And Creative Archetypes As Shown In Works By Thomas Bernhard., Karen Appaline Moseley
Schizophrenia And Creative Archetypes As Shown In Works By Thomas Bernhard., Karen Appaline Moseley
LSU Historical Dissertations and Theses
Thomas Bernhard's work remains controversial after more than twenty years of critical acclaim. Attempts to interpret his work according to traditional literary standards have generated as many questions as answers. Anneliese Botond believes Bernhard's work cannot be understood only through literary analysis, and Gudrun Mauch proposes that Jungian archetypes are present in his autobiographical novels. Critics agree, however, that Bernhard portrays mad protagonists in a seemingly insane world. The present study analyzes schizophrenia, myth, and the creative process in Bernhard's work to propose purpose for his descriptions of madness. This study also addresses questions posed by J. de Cort, who …
Analysis Of The Instability Of Laminar, Newtonian Liquid Jets In Air., Warren Thorne Abbott
Analysis Of The Instability Of Laminar, Newtonian Liquid Jets In Air., Warren Thorne Abbott
LSU Historical Dissertations and Theses
This dissertation results from an investigation into the instability of free jets of a Newtonian liquid (water) in air which are produced from long nozzles and have initially parabolic velocity profiles. This work includes an experimental investigation into both the jet length and the drop formation of such jets. This work also includes a numerical solution of the momentum equations in cylindrical coordinates. From the experimental work, a modification to existing theoretical equations has been made to account for the existance of local maxima in the length of laminar jets as their velocity is increased. An addition to the modification …
A Natural L(,P)-Metric For Spaces Composed Of Probability Measures With P-Th Moment., Mark William Scott
A Natural L(,P)-Metric For Spaces Composed Of Probability Measures With P-Th Moment., Mark William Scott
LSU Historical Dissertations and Theses
In the dissertation, it is seen that every probability measure with p-th moment on a complete, separable metric space can be viewed as a distribution of a metric space valued random variable. Between such random variables there exists an L(,p)-distance, and by finding the infimum of the L(,p)-distances between two types of random variables, it is possible to define a distance between distributions. It is seen that this distance can serve as a complete metric on the space of probability measures with p-th moment. The topology produced is shown to be equivalent to the topology of weak convergence of measures …
Studies On Several Biologically Active Peptides And Synthetic Random Copolypeptides., Randall Murdock Robinson
Studies On Several Biologically Active Peptides And Synthetic Random Copolypeptides., Randall Murdock Robinson
LSU Historical Dissertations and Theses
The work presented here is based on the Zimm-Bragg model for the helix-coil transition in polypeptides. Biologically active peptides discussed include: (beta)-endorphin, (beta)-lipotropin, glucagon, secretin, vasoactive intestinal peptide, and the binding or B subunit of cholera toxin. Random copolypeptides studied include copolymers of (omega)-hydroxyethyl and (omega)-hydroxybutyl-L-glutaminyl residues, and ionic copolypeptides containing L-glutamyl and either L-alanyl or L-tyrosyl residues. Residues 17-29 of (beta)-endorphin are expected from calculation to be alpha helical in the presence of anionic lipids. This portion of the chain forms an amphipathic helix which would be expected to interact favorably with a membrane containing anionic lipids. The order …
An Economic Analysis Of The Production And Marketing Of Selected Vegetable Crops In Northeast Louisiana., Luis Guillermo Vanegas
An Economic Analysis Of The Production And Marketing Of Selected Vegetable Crops In Northeast Louisiana., Luis Guillermo Vanegas
LSU Historical Dissertations and Theses
This study provides an economic profile of small vegetable producers in Northeast Louisiana, develops enterprise budgets for selected vegetable crops, analyzes several resource situations and determines, via a linear programming model, the optimal resource allocation to different enterprise combinations for tiller and tractor technology. Labor available in specific time periods was found to be the most restrictive resource in all situations for both technologies. However, the proportion of annual available labor used was not higher than 30 percent in any case. As more land for vegetable production was made available to tiller technology farmers, net returns increased considerably but returns …
Adaptive Feedforward Control Of Wastewater Neutralization., Richard Albert Balhoff
Adaptive Feedforward Control Of Wastewater Neutralization., Richard Albert Balhoff
LSU Historical Dissertations and Theses
The purpose of this dissertation is to show the development and testing of an adaptive feedforward control of a wastewater neutralization process. The adaptive controller is compared to a nonlinear proportional-integral-derivative (NPID) controller developed by Shinskey (1970). The process and controllers were simulated digitally. The adaptive controller utilizes two pH probes, a feedforward probe and a feedback probe (this measurement is used in the adaptive gain calculation). The feedback measurement provides the adaptive controller with a form of reset action. Probe noise and lag, valve hysteresis and lag, and dead time were included in the simulation. The process simulated for …
Eigenvalues Of Nuclear Operators Of Diagonal Type., Raymond J. Kaiser
Eigenvalues Of Nuclear Operators Of Diagonal Type., Raymond J. Kaiser
LSU Historical Dissertations and Theses
A nuclear operator T on a Banach space is an operator admitting a representation T = (SIGMA) T(,n) where each operator T(,n) has rank one and (SIGMA) (VERT.BAR)(VERT.BAR)(TAU)(,n)(VBAR)(VBAR) < (INFIN). A. Grothendieck proved that the sequence of eigenvalues, repeated according to their multiplicities, of such a nuclear operator must be square summable and that, in fact, two is the best possible exponent of summability. This work uses operators of diagonal type, i.e., operators which admit a diagonal representation with respect to a biorthogonal system, to construct examples of eigenvalue behavior. In particular we show that all of the known results concerning eigenvalue summability of nuclear operators can be obtained using operators of diagonal type. In Chapter 1, we present the terminology and notation to be used in this work. Chapter 2 gives a summary of results concerning nuclear (trace class) operators on Hilbert space. In Chapter 3, some of the important known results concerning eigenvalue behavior of nuclear operators on general Banach spaces are presented. The convolution operators on L(,p)(0,1), 1 < p < (INFIN), p (NOT=) 2, are diagonal operators since the trigonometric system (e('2(pi)inx)) is a conditional basis of these spaces. In Chapter 4 we use these important operators to exhibit extremal behavior of eigenvalue summability of nuclear operators on the L(,p)-spaces. In Chapter 5, we study nuclear cyclic diagonal operators. If X(,1),... ,X(,n) are sequence spaces, an operator D on (CRPLUS)X(,i) is a cyclic diagonal operator if its restriction to each X(,i) is a diagonal operator into X(,i+1) (if i = n into X(,1)). Certain eigenspaces of these operators have important applications to Banach space theory. Finally, in Chapter 6, we use a recently discovered space of G. Pisier to answer affirmatively a long outstanding question of. Pe l cynski and Saphar which is converse to Grothendieck's result: Given a (nonzero) sequence ((lamda)(,n)) in l(,2), is there a Banach space X and a nuclear operator on X whose eigenvalue sequence is ((lamda)(,n))?
Development Of Louisiana Public School Guidance Services, 1942-1972., Alice Hunter Chilton
Development Of Louisiana Public School Guidance Services, 1942-1972., Alice Hunter Chilton
LSU Historical Dissertations and Theses
The purpose of this study was to determine how guidance services developed in the public schools of Louisiana between 1942 and 1972. In order to understand the events of these years, it was necessary to examine the period preceding them. In the beginning of the guidance movement, social workers pioneered in assisting youth with problems associated with industrialization. Louisiana was unique in that its guidance program started within the school system. An experimental program began in the Orleans Parish Schools in 1921. It was considered effective and continued. In the 1920s vocational guidance was offered for the first time at …
Toward A Classification Of General Systems Theory Concepts: The Categorization Of Vocabulary Components And Their Usage Patterns In The Literature., Stephanie S. Robbins
Toward A Classification Of General Systems Theory Concepts: The Categorization Of Vocabulary Components And Their Usage Patterns In The Literature., Stephanie S. Robbins
LSU Historical Dissertations and Theses
The achievement of the goals of General Systems Theory are, in part, dependent on the development and use of a language which will facilitate relevant communication across disciplines so that structural similarities which are hidden by the use of specialists' languages can be examined. This study explores various dimensions of the language associated with GST. The major vocabulary components associated with GST were identified using four criterion. The first was designed to enumerate terms that reflected the dimensional aspects of systems terminology needed to identify systems characteristics which are isomorphic across different disciplines. The second criterion eliminated discipline-bound terms with …
On Valuation Rings As Homomorphic Images Of Valuation Domains., J. Paul Vicknair
On Valuation Rings As Homomorphic Images Of Valuation Domains., J. Paul Vicknair
LSU Historical Dissertations and Theses
A number of years ago, I. Kaplansky raised informally the question of whether every valuation ring could be expressed as a homomorphic image of a valuation domain. By a valuation ring, we mean a commutative ring with identity whose ideals are linearly ordered by inclusion. The classical notion of a valuation ring included the assumption that the ring is a domain. For two cases an affirmative answer to Kaplansky's question is known: for 0-dimensional valuation rings; and, for valuation rings which are monoid rings. In the early 40's, Kaplansky obtained structure theorems for a large class of (maximally complete) valuation …
The Relationship Of The School Principal's Leader Behavior To Teacher Morale., Marietta Welch James
The Relationship Of The School Principal's Leader Behavior To Teacher Morale., Marietta Welch James
LSU Historical Dissertations and Theses
The purpose of this study was to investigate the relationship between morale of Louisiana public elementary school teachers and their principal's leader behavior. The study was designed to test the following major hypotheses: (1) There is no significant relationship between elementary school teachers' perceptions of the principal's leader behavior and teacher morale. (2) There is no significant difference in the relationship in the mean morale score of teachers perceiving their principals as above the mean on the total leader behavior score and those perceiving their principals as below the mean on the total leader behavior score. (3) There is no …
Recovery Of Sugars From Blackstrap Molasses By Ion Exclusion., Edgar L. Aguirre G.
Recovery Of Sugars From Blackstrap Molasses By Ion Exclusion., Edgar L. Aguirre G.
LSU Historical Dissertations and Theses
Ion exclusion is a chromatographic separation of ionic from non-ionic material on a bed of ion exchange resins. This process has been proposed for the recovery of sucrose from molasses. However, separation of sucrose from the non-sugar and reducing sugar fractions is difficult. On the contrary, separation of reducing sugars from non-sugars is relatively easy. Inverting the sucrose to reducing sugars for further separation by ion exclusion gives a way to recover essentially all the sugars from molasses. Also, it eliminates the need for crystallization, since the reducing sugars can be sold in solution. The total sugar content in blackstrap …