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Multivariable Adaptive Control Design Under Internal Model Control Structure., Ivan Patricio Solar Jan 1988

Multivariable Adaptive Control Design Under Internal Model Control Structure., Ivan Patricio Solar

LSU Historical Dissertations and Theses

A new adaptive multivariate control scheme has been devised. The method combines the best characteristics of conventional adaptive systems and internal model control (IMC) structure. The control scheme builds by itself the required models and avoids the ambiguities in the definition of performance specifications. The problem of plant inversion associated with the IMC structure has been solved. The method introduced in this work is based on the properties of the Smith-McMillan form. However, the method does not require the explicit determination of the form. Furthermore, the computation of a stable plant inverse requires only matrix inversion and scalar polynomial factorization. …

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Relative Isometric And Dynamic Endurance Curves For Different Muscle Groups Of The Upper Extremities., Seung Ho Yoon Jan 1988

Relative Isometric And Dynamic Endurance Curves For Different Muscle Groups Of The Upper Extremities., Seung Ho Yoon

LSU Historical Dissertations and Theses

This study analyzed the characteristics of both dynamic and isometric relative endurance curves for four different muscle groups of the upper extremities. College males (N = 56) were tested on the Cybex Isokinetic Dynamometer both isometrically and dynamically on four exercises: bench press, arm curls, shoulder internal rotation and wrist flexion. In all, eight separate exercises were examined. Each dynamic and isometric exercise bout was for 80 and 60 s, respectively and data were recorded ever 4 s. Parameters examined were Maximal Strength, Total Force Output, Relative Total (RT, TFO, divided by 80s or 60s x peak force), and Relative …

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Effects Of Sex And Social Influence On Perception Of Physical Effort During Light To Heavy Work By Elite Athletes., Michael Francis Sylva Jan 1988

Effects Of Sex And Social Influence On Perception Of Physical Effort During Light To Heavy Work By Elite Athletes., Michael Francis Sylva

LSU Historical Dissertations and Theses

This study was designed to investigate the effect of sex and social influence on perception of physical effort during light or heavy work by male and female athletes. Subjects performed three submaximal trials of 27 minutes each on a cycle ergometer at 25, 50 and 70% of maximum oxygen consumption in the presence of a male coactor, a female coactor, and just riding alone. The results indicated that subjects' ratings of perceived exertion (RPE) were similar when performing at all three coactor/alone conditions. No significant sex difference in RPE was found. Thus, highly trained male and female atheletes did not …

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Development Of A Computer-Integrated Manufacturing Simulation Model: A Hybrid Systems Approach., Vinay Kumar Vasudev Jan 1988

Development Of A Computer-Integrated Manufacturing Simulation Model: A Hybrid Systems Approach., Vinay Kumar Vasudev

LSU Historical Dissertations and Theses

The key to the successful "factory of the future" will be the effective coordination of managerial functions and production operations. The research presented in this dissertation addresses this "coordination" issue, especially in terms of understanding the impact and possibilities which exist in an information-rich environment. Such an environment is often referred to in the literature as being a computer-integrated manufacturing (CIM) environment. An interactive simulation modeling program, MOSES (Manufacturing Organization Simulation and Evaluation System), was developed for the purpose of describing, analyzing, and understanding such manufacturing. MOSES is a copyrighted computer program, a menu-driven, interactive, simulation modeling tool. MOSES users …

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On Matroid Connectivity., Safwan Akkari Jan 1988

On Matroid Connectivity., Safwan Akkari

LSU Historical Dissertations and Theses

Certain classes of 2- and 3-connected matroids are studied in this thesis. In Chapter 2 we give a characterization of those 2-connected matroids M with the property that, for a given positive integer m, the deletion of every non-empty subset of M having at most m elements is disconnected. A bound on the maximum number of elements of such a matroid in terms of its rank is also given, along with a complete description of the matroids attaining this bound. These results extend results of Murty and Oxley for minimally 2-connected matroids. A characterization of the 3-connected matroids M that …

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Lie Group And Control Theory., Inheung Chon Jan 1988

Lie Group And Control Theory., Inheung Chon

LSU Historical Dissertations and Theses

Let G be a Lie group, L(G) its Lie algebra. If S is a closed subsemigroup of G, we define its tangent set L(S) by L(S) = $\{$X $\in$ L(G): exp(tX) $\in$ S for t $\geq$ 0$\}$. It is a standard result that L(S) is a closed convex cone--indeed a special such called a Lie wedge. In specific examples it is generally not so difficult to determine L(S) given S. However, in the reverse direction, it is often quite difficult to compute precisely the semigroup generated by exp(L(S)) (the so-called infinitesimally generated subsemigroup) and determine whether it is all of …

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For At-Risk Students: A Theory Based Alternative Structured School Model, Its Implementation And Evaluation., Suzan Naquin Gaston Jan 1988

For At-Risk Students: A Theory Based Alternative Structured School Model, Its Implementation And Evaluation., Suzan Naquin Gaston

LSU Historical Dissertations and Theses

The purpose of this study has been to design, implement, and evaluate an alternative structure to traditional schools, operationalized as the Louisiana State Youth Opportunities Unlimited School. The alternative structure of the school was based on a number of theoretical concepts. The implementation of this structure intended to increase the level of coping skills in student participants who were at risk for dropping out of high school. There were two theoretical models that influenced the design of the LSYOU school. The first model suggests that the socialization of clients is most effective in organizations that are high in scope and …

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Double Loop Interconnection Networks With Minimal Transmission Delay., Dvora Tzvieli Jan 1988

Double Loop Interconnection Networks With Minimal Transmission Delay., Dvora Tzvieli

LSU Historical Dissertations and Theses

The interconnection network is a critical component in massively parallel architectures and in large communication networks. An important criterion in evaluating such networks is their transmission delay, which is determined to a large extent by the diameter of the underlying graph. The loop network is popular due to its simplicity, symmetry and expandability. By adding chords to the loop, the diameter and reliability are improved. In this work we deal with the problem of minimizing the diameter of double loop networks, which model various communication networks and also the Illiac type Mesh Connected Computer. A double loop network, (also known …

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Computer Anxiety Levels Of Southern Region Cooperative Extension Service Agents., Myra Lynn Nettles Smith Jan 1988

Computer Anxiety Levels Of Southern Region Cooperative Extension Service Agents., Myra Lynn Nettles Smith

LSU Historical Dissertations and Theses

The objectives of this study were: to determine the computer anxiety levels of Cooperative Extension Service agents; to describe agents' concerning computer use, skill levels, availability and use of office computers, formal computer training, and administrative support; and to determine the variance in computer anxiety explained by selected variables. A mailed questionnaire to 544 randomly selected Southern Region agents was used with a 97.8% response rate. Computer anxiety levels were measured using Oetting's (1983) Computer Anxiety Scale (COMPAS). Descriptive statistics and correlation coefficients were calculated. Stepwise multiple regression at the.05 level was used to develop a model which explained agents' …

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The Congruence Extension Property For Algebraic Semigroups., Josefa I. Garcia Jan 1988

The Congruence Extension Property For Algebraic Semigroups., Josefa I. Garcia

LSU Historical Dissertations and Theses

A semigroup has the congruence extension property (CEP) provided that each congruence on each subsemigroup can be extended to the semigroup. This property, along with the ideal extension property (IEP) and the group congruence extension property (GCEP) are studied in this work. Whether each of these properties is productive, hereditary or preserved by homomorphisms is determined (except for the homomorphic property for CEP). Conditions under which the homomorphic image of a semigroup with CEP has CEP are established. Disruptive element and disruptive pair theory is developed and shown to be an important concept in the study of CEP and IEP. …

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A Field Method For Assessing Borehole Friction For Directional Well Casing, Eric E. Maidla, Andrew K. Wojtanowicz Jan 1988

A Field Method For Assessing Borehole Friction For Directional Well Casing, Eric E. Maidla, Andrew K. Wojtanowicz

Faculty Publications

A field procedure to evaluate the borehole friction factor between a pipe string and a borehole was developed. The primary concern of this research was to investigate and mathematically describe the drag associated with casing runs in directional wells through the use of the two-dimensional approach. The borehole friction factor was found, through an iterative procedure, by matching the calculated hook load to the measured one at the surface. The borehole friction factor was calculated as the unique value for the match. This study shows the necessary precision requirements for the hook load measurement instrumentation and presents three different types …

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Three Essays On The Welfare Effects Of Factor Immobility And Price Uncertainty For A Country Experiencing Growth, Entering A Customs Union And Giving Or Receiving A Unilateral Transfer., Carolyn Margaret Landry Jan 1988

Three Essays On The Welfare Effects Of Factor Immobility And Price Uncertainty For A Country Experiencing Growth, Entering A Customs Union And Giving Or Receiving A Unilateral Transfer., Carolyn Margaret Landry

LSU Historical Dissertations and Theses

This dissertation presents an intertemporal model with two degrees of endogenously determined labor mobility: complete immobility in the short run and partial mobility in the long run. It examines the impact on welfare when, in response to a change in an exogenous variable, the nation adjusts its output ratio. The movement of factors between sectors is necessary but in the case of labor, that does not take place at first because of labor's slowness in responding to a developing wage differential. The consequent contraction of the product transformation curve is welfare reducing. Uncertainty about the future terms of trade is …

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Semantic Constraint Modeling In Database Using The Applicative Data Language., Herman Hai-Lou Lee Jan 1988

Semantic Constraint Modeling In Database Using The Applicative Data Language., Herman Hai-Lou Lee

LSU Historical Dissertations and Theses

There is a growing need to incorporate database integrity subsystems into large information systems in engineering design environments and real-time control and monitoring environments. The objectives of the integrity subsystem are to provide a user interface for constraint specification, to compile the specification into enforcement strategies, and to check data integrity at both compile-time and run-time. The approach proposed by this research is to develop the conceptual view of the database using the Entity Relationship Model (ERM). Users' queries and semantic constraints can be specified by an ER-based data language, the Applicative Data Language (ADL). Any ADL constraint specification is …

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Historical Tradition In The Pre-Serial Atonal Music Of Alban Berg., William Glenn Walden Jan 1988

Historical Tradition In The Pre-Serial Atonal Music Of Alban Berg., William Glenn Walden

LSU Historical Dissertations and Theses

The purpose of this study is to examine and discuss the traditional compositional elements in the pre-serial atonal music of Alban Berg. The dissertation is divided into eight chapters. Chapter One serves as an introduction, Chapters Two through Seven form the main body, and Chapter Eight contains a summary and conclusions. In the introductory chapter, the essential techniques for composing atonal music are described, as well as solutions to the problems of creating unity and cohesiveness without the organizational potential provided by tonality. Berg's own special melodic techniques, imitative constructions, ostinatos, and utilizations of traditional forms are also described in …

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An Object Oriented Paradigm For Requirements Specifications., David W. Cordes Jan 1988

An Object Oriented Paradigm For Requirements Specifications., David W. Cordes

LSU Historical Dissertations and Theses

Software engineering defines a formalized five-step life-cycle for software development. These steps are: requirements specification, design, implementation, testing and maintenance. The requirements specification phase of the software development life-cycle is responsible for determining the functionality of the proposed system. In this work, a methodology is developed that enhances the generation of accurate requirements specifications, utilizing an object-oriented paradigm. This research realizes four objectives. First, the process of information transferral between the user and the specification team is enhanced. Second, a working base of knowledge containing the domain-specific information within the initial requirements document is established for use by the specification …

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A Comparison Of Four Multiattribute Utility Function Elicitation Procedures For Preference Predictions., Phillip C. Fry Jan 1988

A Comparison Of Four Multiattribute Utility Function Elicitation Procedures For Preference Predictions., Phillip C. Fry

LSU Historical Dissertations and Theses

Multiattribute utility analysis is a set of formal procedures designed to assist a decision maker in resolving problems requiring tradeoffs among competing objectives. The approach elicits a multiattribute utility function (MAUF) intended to represent the decision maker's preferences for multivariate alternatives. While different MAUF assessment technologies are available, few studies have been conducted that compare assessment techniques. The purpose of this research was to investigate the predictive ability of four MAUF elicitation procedures. Keeney-Raiffa (KR), holistic orthogonal parameter estimation (HOPE), simple multiattribute rating technique (SMART), and mathematical programming elicited MAUFs were compared in terms of (1) ordinal preference predictions, (2) …

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Information Acquisition And Decision-Making In Creditors' Decision Environment., Pao-Chuan Lin Jan 1988

Information Acquisition And Decision-Making In Creditors' Decision Environment., Pao-Chuan Lin

LSU Historical Dissertations and Theses

This study identified the financial information used by the loan officers in a commercial lending context. The identification of information acquisition made it possible for the researcher to verify whether the manipulated financial information in the experiment was processed by the subjects. As a consequence, the inference concerning the impact of the treatment on loan officers' decisions could be more conclusive. Most real decision tasks are similar to a situation in which the decision maker has to search for and decide which information to use rather than conforming to an a priori decision model specified by the researcher. The subjects …

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Application Of The Fast Fourier Transform To Impedance Analysis Of Nitrogen - Titanium-Dioxide And Lanthanum-Trifluoride Electrodes., Kenneth Robert Carney Jan 1988

Application Of The Fast Fourier Transform To Impedance Analysis Of Nitrogen - Titanium-Dioxide And Lanthanum-Trifluoride Electrodes., Kenneth Robert Carney

LSU Historical Dissertations and Theses

A study is presented of the utility of pulse derived waveforms for use in impedance analysis of electrochemical systems. Factors to be considered in optimization of pulse duration and also in the proper implementation of the FFT are discussed. Impedance results are presented for model circuits and for two nonfaradaic electrochemical systems--n-TiO$\sb2$ electrode in aqueous Na$\sb2$SO$\sb4$ and LaF$\sb3$ electrode in aqueous fluoride solution. The techniques developed were applied to model circuits composed of aperiodic elements in order to quantify the decrease in precision with increasing frequency associated with pulse type waveforms. Using 8 bit digital sampling resolution and 512 point …

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Aspects Of Subsurface Brine Formation In Passive Continental Margin Evaporite Basins., Vishnu Ranganathan Jan 1988

Aspects Of Subsurface Brine Formation In Passive Continental Margin Evaporite Basins., Vishnu Ranganathan

LSU Historical Dissertations and Theses

This dissertation consists of three papers which quantitatively model subsurface brine formation in passive, continental margin evaporite basins. In the first paper, a one dimensional finite difference model is developed to evaluate the brine-forming role of molecular diffusion of dissolved NaCl in the subsidence history of a hypothetical sedimentary basin containing a thick basal halite bed. It is shown that diffusion of dissolved NaCl from evaporites may be an important brine-forming process in young passive margin evaporite basins where evaporites are flat lying or gently dipping and that vertical fluxes of dissolved NaCl are great for basins with slow subsidence …

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On The Thermodynamics Of Quantum-Electrodynamic Frequency Shifts, G. W. Ford, J. T. Lewis, R. F. O'Connell Dec 1987

On The Thermodynamics Of Quantum-Electrodynamic Frequency Shifts, G. W. Ford, J. T. Lewis, R. F. O'Connell

Faculty Publications

A paper by Barton (ibid., vol.20, p.879, 1987) comments on some of Ford et al.'s recent work in this general area and takes issue with some of their conclusions. Ford et al. point out that Barton's reinterpretation of his own previous work actually serves to support their conclusions. In particular, he is making extensive use of thermodynamic concepts (free energy, thermodynamic perturbation theory, . . .) which were introduced for the first time into this area in the papers by Ford et al.

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Benthic Foraminiferal Assemblages From Mexican Continental Shelves, Maria De La Luz Mata Apr 1987

Benthic Foraminiferal Assemblages From Mexican Continental Shelves, Maria De La Luz Mata

LSU Historical Dissertations and Theses

The recent benthic foraminifera 1 fauna of the continental margins of Mexico (Gulf of Campeche and Gulf of Tehuantepec) was studied. Surficial sediment samples (lOcc) were collected using a Shipeck dredge and were stained with Sudan Black "B" in order to differentiate the living fauna from the death assemblage. In the 41 samples from the Gulf of Campeche, 279 species were found in the total assemblage in water depths ranging from 9 to 586 m. In the 22 samples in the Gulf of Tehuantepec, 132 species were identified from the total assemblage in water depths of 20 to 180 m. …

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Free Energy For Harmonically Bound Fermions In A Magnetic Field, Lipo Wang, R. F. O'Connell Mar 1987

Free Energy For Harmonically Bound Fermions In A Magnetic Field, Lipo Wang, R. F. O'Connell

Faculty Publications

An analytic expression is obtained for the free energy of fermions bound in an anisotropic harmonic potential in the presence of an arbitrary magnetic field, at a finite temperature. The specific heat and the magnetic moment are readily calculated. The results consist of two parts, a steady part and an oscillatory one. The latter is similar to the well known de Haas-van Alphen oscillation, but persists in the absence of a magnetic field. Application of the results to the nuclear shell model and surface effects of solids are briefly discussed. © 1987, IOP Publishing Ltd.

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Lsu General Catalog 1987-1988, Louisiana State University And Agricultural And Mechanical College Jan 1987

Lsu General Catalog 1987-1988, 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.

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Conditioning Of Ryegrass For Faster Drying, M Tsang Mui Chung Jan 1987

Conditioning Of Ryegrass For Faster Drying, M Tsang Mui Chung

LSU Agricultural Experiment Station Reports

No abstract provided.

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Fail-Safe Local Area Networking Using Channel Redundancy., Ibibia Karisemie Dabipi Jan 1987

Fail-Safe Local Area Networking Using Channel Redundancy., Ibibia Karisemie Dabipi

LSU Historical Dissertations and Theses

Local area networks represent a major development in data communications. The ring topology is the most popular of the local area networks. Its inherent problem, however, is the breakdown of the entire network in the event of a station failure resulting in total shut-down until repairs can be made. This dissertation is a study of designs for fail-safe local area networks. Two methods for maintaining the operation of a ring network are analyzed and compared. The first method uses a double-ring where the inner loop is optically coupled to the outer ring whenever a node failure occurs. The analysis performed …

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A Study Of The Temperature Dependence Of Ion-Molecule Association Reactions. Halide Ion Addition To A Selected Group Of Lewis Acids., Charles Ray Herd Jan 1987

A Study Of The Temperature Dependence Of Ion-Molecule Association Reactions. Halide Ion Addition To A Selected Group Of Lewis Acids., Charles Ray Herd

LSU Historical Dissertations and Theses

Recent evidence has indicated that the ion-molecule association reaction BF$\sb 3$ + F$\sp -$ - thinspace- BF$\sb 4\sp -$ has both collisional stabilization and radiative stabilization pathways. Preliminary studies indicated that other boron trihalide systems (BF$\sb 3$ + Cl$\sp -$, Br$\sp -$, and BCl$\sb 3$ + Cl$\sp -$, Br$\sp -$) behave similarly. We have studied the temperature dependence of these systems in an effort to learn more about the individual rate coefficients that constitute the standard association mechanism modified to include a radiative stabilization pathway. In order to determine properties of a system which play an important role in the …

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Spectroscopic Studies Of Cobalt(Ii) Thiolates And Cobalt(Ii) - Substituted Metallothioneins., Barbara Ann Dixon Jan 1987

Spectroscopic Studies Of Cobalt(Ii) Thiolates And Cobalt(Ii) - Substituted Metallothioneins., Barbara Ann Dixon

LSU Historical Dissertations and Theses

Metallothioneins (MT) are widely occurring proteins characterized by low molecular weights and extremely high metal and sulfur content. Mammalian forms usually contain seven diamagnetic metal ions such as Zn(II) and/or Cd(II) and 20 cysteine residues. An understanding of the physiological role(s) of MT requires the elucidation of the nature and type of metal clusters, and the mechanism of assembly in MT. The stepwise incorporation of Co(II) ions into apo-metallothionein-2 from rabbit liver has been monitored by UV-visible absorption, low temperature magnetic circular dichroism (MCD), and EPR spectroscopies. Interpretation of the results has been facilitated by parallel spectroscopic studies of synthetic …

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The Impact Of Comprehensive Allocation And Flow-Through Method Of Accounting For The Income Taxes On The Investment Decision: A Field Experiment., Zafar Ullah Khan Jan 1987

The Impact Of Comprehensive Allocation And Flow-Through Method Of Accounting For The Income Taxes On The Investment Decision: A Field Experiment., Zafar Ullah Khan

LSU Historical Dissertations and Theses

The purpose of this study was to determine whether investment decisions are affected by (1) alternative methods of accounting for income taxes and (2) the magnitude of deferred tax credits in the balance sheet. Financial analysts were asked to estimate net income and stock price, and to provide equivalence intervals as measures of uncertainty. The subjects based their predictions upon financial statements of a real company and selected financial information. Six different forms of the information cue set were used--three accounting methods (deferred method of comprehensive allocation, flow-through, and flow-through with footnote disclosure of deferred taxes as under the deferred …

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Use Of Multiple Time Series Analysis To Forecast Maintenance Manhour Requirement For The Chemical Process Industry., Helen Bostock Jan 1987

Use Of Multiple Time Series Analysis To Forecast Maintenance Manhour Requirement For The Chemical Process Industry., Helen Bostock

LSU Historical Dissertations and Theses

It is hypothesized that chemical processing plant maintenance manhour requirement (the number of hours required to maintain a production facility at an optimal level) can be forecast. The hypothesis is supported by (1) a study of the independent variables which may impact the dependent variable, maintenance manhour requirement and (2) a comparative analysis of technological forecasting methods that suggested which methods might be most appropriate. Both econometric and statistical forecasting methods were considered. The philosophy inherent in each approach was recognized. A procedure for choosing a forecasting method to suit a given situation is outlined. Multiple time series analysis, supported …

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Maximal Subsemigroups Of Lie Groups That Are Total, Jimmie D. Lawson Jan 1987

Maximal Subsemigroups Of Lie Groups That Are Total, Jimmie D. Lawson

Faculty Publications

The major problem with which this paper is concerned is determining criteria that allow one to decide whether the subsemigroup generated by a subset B of a group G is all of G. Motivations for considering this problem arise from at least two sources. The first source concerns the program to develop a Lie theory of semigroups. Given a closed subsemigroup S of Lie group G, one defines the tangent object of S in the Lie algebra L(G) by L(S) = {xeL(G):exp(tx)∊S for all t≧0}. © 1987, Edinburgh Mathematical Society. All rights reserved.

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