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Development Of A New Conductivity Model For Shaly Sand Interpretation., Pedro L. Silva Jan 1986

Development Of A New Conductivity Model For Shaly Sand Interpretation., Pedro L. Silva

LSU Historical Dissertations and Theses

In this dissertation, a new theoretical conductivity model for shaly sands is developed. The model is based on dual water concepts. In addition, the equivalent counterion conductivity changes as the diffuse electrical double layer expands and is then a function of temperature, shaliness, and of the conductivity of the far water. The formation resistivity factor used in the model is independent of shaliness. A method to calculate the equivalent counterion conductivity is proposed. This method is based on treating the double layer region as a hypothetical electrolyte, the properties of which are derived from basic electrochemistry theory. The new model …

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Development Of An Extruded Whole Cottonseed Product As A Bypass Protein Source For Lactating Dairy Cattle., Jana Allene Stutts Jan 1986

Development Of An Extruded Whole Cottonseed Product As A Bypass Protein Source For Lactating Dairy Cattle., Jana Allene Stutts

LSU Historical Dissertations and Theses

Whole cottonseed extruded at temperatures ((DEGREES)C) and rates (kg/hour) of 131, 314; 135, 182; 146, 195; and 156, 286 was evaluated for protein solubility, in vitro ammonia production, and in situ disappearance to estimate bypass protein potential. Whole cottonseed, soybean meal, corn gluten meal, and soybean meal and whole cottonseed heated for 4 hours at 127, 138, and 149(DEGREES)C were also evaluated for comparison. Solubility was determined by three methods: hot water-refluxed 1 hour; cold water-mixed 30 minutes; and cold water-homogenized 5 seconds. Ammonia production was measured after 2, 4, and 6 hour incubations. Disappearance of crude protein and dry …

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A Practice Manual: Jacob Dont's Twenty-Four Studies, Opus 37 (Violin, Austria)., James Christopher Thompson Jan 1986

A Practice Manual: Jacob Dont's Twenty-Four Studies, Opus 37 (Violin, Austria)., James Christopher Thompson

LSU Historical Dissertations and Theses

A Practice Manual: Jacob Dont's TWENTY-FOUR STUDIES, Opus 37 (for solo violin) is designed for use with the Galamian edition of this work. The text provides specific practice objectives and practice procedures for each of the studies in Dont's Opus 37. This manual is intended to function as a supplement to studio instruction--not as a substitute for it. Aspects of technique which commonly present problems to most students are identified. Practice procedures designed to provide solutions to these problems are presented. The principles of practice incorporated in this manual can be applied in many examples from the etude literature for …

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Palladium-Catalyzed Vinylic Substitution Of Aryl Halides On Polymeric Nitrogen Supports., Chia-Hsing Sun Jan 1986

Palladium-Catalyzed Vinylic Substitution Of Aryl Halides On Polymeric Nitrogen Supports., Chia-Hsing Sun

LSU Historical Dissertations and Theses

The structure of typical palladium complexes used as catalysts in organic synthesis is reviewed; particular attention is paid to the systematic study of palladium catalyzed vinylic substitution on a variety of aryl iodides and bromides (Heck-type vinylation). The general conditions of this process, i.e., a homogeneous catalyst operating at moderate temperature, which requires a proton acceptor to complete the catalyst cycle, are conducive to successful development of a polymer-bound catalyst. Using 4-picoline as a ligand under homogeneous Heck-type vinylation conditions. Morpholine is an adequate base to stabilize the catalytic picoline complex when aryl iodides are condensed with styrene. However, sodium …

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Rearrangements Of Alpha-Halosilanes And Conformational Analysis Of Silanes., Rayomand Jal Unwalla Jan 1986

Rearrangements Of Alpha-Halosilanes And Conformational Analysis Of Silanes., Rayomand Jal Unwalla

LSU Historical Dissertations and Theses

A number of (alpha)-halosilanes, some which are chiral at carbon, have been prepared. Lewis acid-catalyzed rearrangements and thermal rearrangements were performed on ((alpha)-chloroethyl)diphenylmethylsilane. Both the rearrangements proceed cleanly; the major product is formed by the migration of the phenyl group from silicon to carbon. The rearranged product mixture was subjected to a Kumada-type oxidation in which the silicon-carbon is cleaved stereospecifically. Thus the principle has been established that a clean rearrangement can be carried out in a manner which will allow determination of the stereochemistry at the carbon center. Preliminary kinetic studies of the thermolysis of ((alpha)-chlorobenzyl)dimethylphenylsilanes containing p-substituents in …

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Analysis Of Factors Influencing The Agricultural Research Delivery System In Liberia., Walter Tamu Wiles Jan 1986

Analysis Of Factors Influencing The Agricultural Research Delivery System In Liberia., Walter Tamu Wiles

LSU Historical Dissertations and Theses

Purpose. This study was carried out to assess the types of channels through which research information is disseminated to the farmer through the agricultural research delivery system in Liberia, and factors which influence the delivery of such information. Population. The population for this study consisted of 324 respondants which included 15 researchers, 127 field extension workers and 182 farmers. Data were gathered specifically from researchers working at the Central Agricultural Research Institute (CARI) and field extension workers and farmers in Bong, Lofa and Nimba counties respectively. Objectives. Two specific objectives of the study were: (1) to present profiles of the …

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Molecular Studies Of T-Lymphocytes From Bovine Leukemia Virus-Infected Cattle., Diana Lynn Williams Jan 1986

Molecular Studies Of T-Lymphocytes From Bovine Leukemia Virus-Infected Cattle., Diana Lynn Williams

LSU Historical Dissertations and Theses

Highly specific monoclonal antibodies and microfluorimetry were used to determine the absolute number of B and T lymphocytes in the peripheral blood of bovine leukemia virus (BLV) infected cattle. The peripheral blood lymphocyte populations from BLV-infected cattle were elevated when compared to BLV-negative animals. The increase in the lymphocyte population in the aleukemic (AL) animals was due to an increase in T lymphocytes. In the PL animals the increase was due mainly to an increase of B lymphocytes but also to an increase of T lymphocytes. The PL animals showed a significantly higher number of surface immunoglobulin positive cells (sIg('+)) …

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The Fricative Sound Source Spectrum Derived From A Vocal Tract Analog., Lawrence Edward Zagar Jan 1986

The Fricative Sound Source Spectrum Derived From A Vocal Tract Analog., Lawrence Edward Zagar

LSU Historical Dissertations and Theses

The applications of speech synthesis for computer voice response and speech analysis present the need for highly intelligible and natural synthesized speech. In order to improve the synthesis of fricative and related sounds, the use of simple models for the source spectrum of fricative sounds is investigated. The investigation is based on the use of a vocal tract analog and experimental measurements. Measurements of the sound pressure spectra of fricative consonants are made. Simple sound pressure measurements and measurements based on the technique for measuring intensity are utilized. The fricatives studied are /f/, /th/, /s/, /sh/, and /h/. Fricative sound …

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Experimental Hemarthrosis In Rhesus Monkeys: Light Microscopic, Scanning And Transmission Electron Microscopic, Biochemical, Metabolic And Morphometric Analyses., David Henry Zeman Jan 1986

Experimental Hemarthrosis In Rhesus Monkeys: Light Microscopic, Scanning And Transmission Electron Microscopic, Biochemical, Metabolic And Morphometric Analyses., David Henry Zeman

LSU Historical Dissertations and Theses

Hemarthrosis in rhesus monkeys was studied to: (1) provide information regarding the possible relationship between traumatic hemarthrosis and naturally occurring calcium pyrophosphate dihydrate-deposition disease (CPPD-DD) in rhesus monkeys, (2) fill a void in the literature regarding experimental hemarthrosis in primates, (3) and study the early changes that occur in blood-induced cartilage destruction by adding biochemical, metabolic and morphometric analyses to the traditional morphologic evaluations. Three ml of autologous blood were injected into the left knee of 16 anesthetized monkeys; the right knee was an untreated control. Monkeys were sacrificed at 7 days, 2, 3, and 6 months post injection (PI). …

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Fate And Transport Of Low-Ph Hazardous Materials After Deep Well Disposal., Winton G. Aubert Jan 1986

Fate And Transport Of Low-Ph Hazardous Materials After Deep Well Disposal., Winton G. Aubert

LSU Historical Dissertations and Theses

The ultimate fate and chemical kinetics of low-pH hazardous wastes after deep well injection were studied. Two experimental approaches were taken. Chemical kinetics of reactions involving acids and typical formation clays was studied using a batch reaction scheme. The effects of reactions involving flowing acidic waste streams and disposal formations were characterized using sand packs of length one foot, four feet, and twenty feet. A numerical ground water flow simulator was used to model the interactions of flowing acidic wastes with linear sand packs and with a hypothetical waste disposal system. Reaction rate coefficients and activation energies were determined for …

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From Migrant To Millionaire: The Story Of The Italian-American In New Orleans, 1880-1910 (Louisiana)., Roselyn Bologna Boneno Jan 1986

From Migrant To Millionaire: The Story Of The Italian-American In New Orleans, 1880-1910 (Louisiana)., Roselyn Bologna Boneno

LSU Historical Dissertations and Theses

This study explores a history of the Italian immigrants in the New Orleans area between the years 1880-1910. It traces their reasons for coming to the United States, the difficulties faced in assimilation, along with their social, religious, intellectual, political and economic developments. First- and second-generation Italians were personally interviewed in depth, and surveys were given to approximately 186 persons of various Italian societies throughout the defined geographical area. Both the content and the source of respondents' opinions are investigated and explored to discover what correlation existed between the written and the oral explanations. In most respects, no significant differences …

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A Collection Of Solo French Chansons From The Early Fifteenth Century For Use In The College Level Voice Studio., Helen Marshall Gibbons Jan 1986

A Collection Of Solo French Chansons From The Early Fifteenth Century For Use In The College Level Voice Studio., Helen Marshall Gibbons

LSU Historical Dissertations and Theses

The first great flowering of polyphonic song occurred from the middle of the fourteenth century through the fifteenth century. A few of these songs are now occasionally included in public concerts. Because of the increasing interest in performance of early music of all types at colleges, universities, and by professional groups, it is important for students and teachers of singing to be exposed to this body of literature. The study of solo songs offers a convenient beginning. This study presents a small collection of French chansons from the early to the middle fifteenth century, each for solo voice with two …

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Para-Social Interaction, Rhetorical Sensitivity, And Television News Viewing., Michael Anthony Domingue Jan 1986

Para-Social Interaction, Rhetorical Sensitivity, And Television News Viewing., Michael Anthony Domingue

LSU Historical Dissertations and Theses

This study sought to determine the relationship between para-social interaction (an imaginary interaction with mass media) with local and network news viewing and rhetorical sensitivity (an attitude toward encoding spoken messages). It was predicted that para-social interaction would be positively related to rhetorical sensitivity. The Rubin, Perse, and Powell PSI Scale was used to measure para-social interaction. The three internal scales of the Hart, Carlson and Eadie RHETSEN II Scale (the Noble Self Scale, the Rhetorical Reflector Scale and the Rhetorical Sensitivity Scale) were used to measure rhetorical sensitivity. 157 undergraduates enrolled in communication courses responded to scales. A canonical …

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Machiavellian Interpersonal Orientation In The Principalship: Role Clarity, Work Satisfaction And Principal Characteristics., Judy Ann Hickman Jan 1986

Machiavellian Interpersonal Orientation In The Principalship: Role Clarity, Work Satisfaction And Principal Characteristics., Judy Ann Hickman

LSU Historical Dissertations and Theses

This study examined the Machiavellian interpersonal orientation in the principalship in relation to perceptions of role clarity, satisfaction with multiple dimensions of the work context, and individual characteristics. The key focus was on how interpersonal orientation influences the way principals' "size up" their work situation. The Getzels and Guba social systems model (1957) and the Christie and Geis interaction model (1970) served as the theoretical basis for the study. An ex post factor research design was utilized in this study of 235 public school principals. Each principal responded to a research packet of measures. Factor analyses were computed for each …

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The Relationship Between Teachers' Perceptions Of Principals' Job Performance, Teacher Job Satisfaction, Principal Influence And School Outcomes., John Aaron Jackson Jan 1986

The Relationship Between Teachers' Perceptions Of Principals' Job Performance, Teacher Job Satisfaction, Principal Influence And School Outcomes., John Aaron Jackson

LSU Historical Dissertations and Theses

This study investigated the relationship between principals' instructional leadership behavior and school effectiveness. In the conceptual model tested, certain school context variables, teachers' job satisfaction and teachers' willingness to accept principals' influence in the instructional realm, were viewed as mediating the relationship between principals' behavior and school outcomes. From this perspective, principals' instructional leadership behavior was seen as being indirectly related to school outcomes by its impact on these mediating variables. For the purposes of this study, teachers' job satisfaction, teachers, willingness to accept principals' professional advice and teachers' perceptions of principals' effectiveness as instructional leaders served as independent variables. …

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Suicide In Henry James's Fiction., Mary John Joseph Jan 1986

Suicide In Henry James's Fiction., Mary John Joseph

LSU Historical Dissertations and Theses

A writer who emphasizes the workings of the minds of his characters by working "an acre of embroidery on an inch of canvas," James calls attention to the portrayal of self-willed deaths in his fiction. Writing in the period following the glorification of the suicidal deaths of Werther and Chatterton, James creates several suicidal characters. Having grown up in a highly individualistic family that emphasized the exercise of free will, and being one who revels in the probing of his characters' consciousnesses, James considered important the role of will in matters of life and death. The ruinous effects of displacement …

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The Rhetoric Of Lee Iacocca: The Man, The Myth, The Message (Michigan)., Jayne Margaret Megginson Jan 1986

The Rhetoric Of Lee Iacocca: The Man, The Myth, The Message (Michigan)., Jayne Margaret Megginson

LSU Historical Dissertations and Theses

The purpose of this study was to analyze the rhetoric of Lee A. Iacocca as expressed in the thoughts and actions of the man; to explore rhetorical aspects of his popular myth-hero qualities; and to examine the rhetorical strategies Iacocca used in presenting his message. Criteria for the study were based on the rhetorical theories of Ernest Bormann, Lloyd Bitzer, and Kenneth Burke, with an emphasis on two of Aristotle's canons. In addition, the pattern for the myth-hero as presented by Joseph Campbell was a guide. These concepts blended into an interrelationship which helped illuminate the dimensions of Iacocca's rhetorical …

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Populations, Selection Mechanisms, And Performance: A Study Of Banks In The State Of Louisiana., Merle John Peper Jan 1986

Populations, Selection Mechanisms, And Performance: A Study Of Banks In The State Of Louisiana., Merle John Peper

LSU Historical Dissertations and Theses

Many theoretical paradigms have been created in an effort to successfully measure organizational performance. One of the more recent approaches, known as the "population perspective," focuses on populations of organizations as its unit of analysis, and attempts to explain the relationships among organizations, populations, and environments. These relationships are explored by (a) grouping organizations into homogeneous clusters or populations, and (b) assessing alternative selection mechanisms or predictors of organizational prosperity. The studying of populations help define the organizational forms allowing survival within an environment, while increasing the generalizability of the study's findings. Studying selection mechanisms within their populations allows the …

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Spectroscopic Studies Of Bacterial Iron-Sulfur Proteins (Electron Paramagnetic Resonance, Magnetic Circular Dichroism)., Deborah Ellen Bennett Jan 1986

Spectroscopic Studies Of Bacterial Iron-Sulfur Proteins (Electron Paramagnetic Resonance, Magnetic Circular Dichroism)., Deborah Ellen Bennett

LSU Historical Dissertations and Theses

Iron-sulfur proteins play a vital role in metabolism; mediating such life-sustaining processes as aerobic and anaerobic respiration, nitrogen fixation, and photosynthesis. This work employs low temperature magnetic circular dichroism (MCD), electron paramagnetic resonance (EPR), and UV-visible spectroscopy to characterize the iron-sulfur clusters of the following bacterial proteins: Azotobacter vinelandii ferredoxinI, Thermus thermophilus ferredoxin, Escherichia coli nitrate reductase and the rubredoxin and ferredoxin from Clostridium pasteurianum. Novel 3Fe-xS clusters were identified in A. vinelandii FdI, T. thermophilus Fd, ferricyanide treated C. pasteurianum Fd, and E. coli nitrate reductase. The uniformity of the magnetic and electronic properties of these clusters in both …

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Charlotte Perkins Stetson Gilman, A Voice For Progress And Perfection: A Rhetorical Analysis Of Selected Addresses, 1883-1892., Stephen Robert Guempel Jan 1986

Charlotte Perkins Stetson Gilman, A Voice For Progress And Perfection: A Rhetorical Analysis Of Selected Addresses, 1883-1892., Stephen Robert Guempel

LSU Historical Dissertations and Theses

Amidst the social reform impulse of late nineteenth-century America, Charlotte Perkins Stetson--noted writer, lecturer, and social reformer--began her career as a spokeswoman for social justice. As such, she lectured to local religious groups, Nationalist clubs, women's clubs, and literary societies on a variety of subjects that included social ethics, family, motherhood, and art. In these many lectures and sermons, Stetson related her unyielding faith in and fervent expression of humanity's potential for perfectibility. This study analyzes six selected addresses delivered by Stetson between the years 1883 and 1892 in order to identify the rhetorical techniques she used to communicate her …

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Dietary Calcium And Blood Pressure In National Health And Nutrition Examination Surveys I And Ii, Christopher Sempos, Richard Cooper, Mary Grace Kovar, Clifford Johnson, Terrence Drizd, Elizabeth Yetley Jan 1986

Dietary Calcium And Blood Pressure In National Health And Nutrition Examination Surveys I And Ii, Christopher Sempos, Richard Cooper, Mary Grace Kovar, Clifford Johnson, Terrence Drizd, Elizabeth Yetley

Faculty Publications

It has recently been reported that a low intake of calcium may be a risk factor for hypertension. In view of the contradictory results, even when the same survey data base has been used by different researchers, an in-depth analysis was undertaken of the data provided by the two cycles of the National Health and Nutrition Examination Survey (NHANES). Both surveys, conducted in consecutive 4-year intervals during the 1970s, were designed to examine representative samples of the U.S. civilian noninstitutionalized population. The overall descriptive findings in relation to mean blood pressure and calcium intake were virtually identical in the two …

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Louisiana Agriculture Magazine, Winter 1986-1987, Lsu Agricultural Experiment Station Jan 1986

Louisiana Agriculture Magazine, Winter 1986-1987, Lsu Agricultural Experiment Station

Louisiana Agriculture

No abstract provided.

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Factors Related To Blood Pressure In A Biracial Adolescent Female Population, M. Liebman, L. F. Chopin, E. Carter, A. J. Clark, G. W. Disney, M. Hegsted, M. A. Kenney, Z. A. Kirmani, K. L. Koonce, M. K. Korslund Jan 1986

Factors Related To Blood Pressure In A Biracial Adolescent Female Population, M. Liebman, L. F. Chopin, E. Carter, A. J. Clark, G. W. Disney, M. Hegsted, M. A. Kenney, Z. A. Kirmani, K. L. Koonce, M. K. Korslund

Faculty Publications

Blood pressure levels, anthropometric parameters, and dietary intakes were assessed in 1981 and 1983 in a population of black (n = 236) and white (n = 296) adolescent girls, aged 14 and 16 years in 1983. The 14-year-old black girls exhibited significantly higher mean systolic and diastolic blood pressures than whites in both years. Body weight and Quetelet index were more strongly associated with blood pressure than were height and triceps skinfold thickness. Correcting blood pressures for weight, Quetelet index, 2-year changes in height, and age at menarche decreased in each case (but did not negate) the observed race differences …

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The Image Of Walking In Hawthorne's Fiction (Journey Motif, Pilgrimage)., Frances Murphy Zauhar Jan 1986

The Image Of Walking In Hawthorne's Fiction (Journey Motif, Pilgrimage)., Frances Murphy Zauhar

LSU Historical Dissertations and Theses

Various scholars have referred to the metaphorical journey in Hawthorne's work. This is the first comprehensive study of the journey image in Hawthorne's fiction. Inquiring into the relationship between the imagery in Hawthorne's short stories and his longer fiction, the study examines the sources of Hawthorne's fascination with the journey motif. Hawthorne uses the journey in his first published work, Fanshawe. Both contrived and derivative of his reading of travel literature and fiction, especially The Pilgrim's Progress, Fanshawe exhibits all facets of the journey-related imagery that Hawthorne employs in his later fiction. Hawthorne wrote his short stories after he wrote …

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The Relation Among Stressful Life-Events, Affective Responses, And Headaches (Migraine, Muscle-Contraction)., Craig Douglas Waggoner Jan 1986

The Relation Among Stressful Life-Events, Affective Responses, And Headaches (Migraine, Muscle-Contraction)., Craig Douglas Waggoner

LSU Historical Dissertations and Theses

Stress is frequently reported as a major contributing factor in both migraine and muscle-contraction headaches. The general conclusions of studies investigating the stress-headache relations are that headache sufferers experience a significant amount of stress in their lives, that stress can precipitate headache attacks, and that headache subjects tend to overreact to stress. The laboratory method and scales measuring major life-events have typically been used in studying stress but have several limitations, particularly for studying exacerbations and remissions of symptoms. Increasing the comprehensiveness of stress measurement, beyond the traditional life-events approach, by assessing stress and affective states on a daily basis …

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The Rhetorical Drama Of Lyndon B. Johnson: A Burkean Analysis., David Stiles Shipley Jan 1986

The Rhetorical Drama Of Lyndon B. Johnson: A Burkean Analysis., David Stiles Shipley

LSU Historical Dissertations and Theses

This study analyzes President Lyndon Johnson's Vietnam rhetoric during the escalation period of 1964-1965 to uncover what effect his place in history, his personality, and his political style had on presidential rhetoric in the twentieth century. For this purpose, the critical insights of Kenneth Burke are utilized not only to uncover what rhetoric Johnson used during this period but also what it meant to the American people and how it served the President's purposes. According to Burke, man views everything through a "fog of symbols." His dramatic critique of symbols, what is sometimes referred to as "logology," attempts to get …

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The Anniversaries For Solo Piano By Leonard Bernstein., Sigrid Luther Jan 1986

The Anniversaries For Solo Piano By Leonard Bernstein., Sigrid Luther

LSU Historical Dissertations and Theses

Leonard Bernstein has written three sets of dedicatory piano miniatures: Seven Anniversaries (1943), Four Anniversaries (1948), and Five Anniversaries (1949-51). Each piece is in honor of a close friend, relative, or family member of a friend of the composer. The titles bear the names of the respective dedicatees (for example, "For Aaron Copland"); the titles in all but the first set also include the date of birth. The purpose of this monograph is to provide background information about each dedicatee and to analyze each tribute in terms of significant musical features, with brief reference to pedagogical considerations. It has been …

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The Threecornered Alfalfa Hopper On Soybean: Determination Of Damaging Stages, Development Of Sampling Methodology, Refinement Of The Action Threshold, And Evaluation Of Insecticidal Control (Spissistilus Festinus, Glycine Max)., Alton Neal Sparks Jr Jan 1986

The Threecornered Alfalfa Hopper On Soybean: Determination Of Damaging Stages, Development Of Sampling Methodology, Refinement Of The Action Threshold, And Evaluation Of Insecticidal Control (Spissistilus Festinus, Glycine Max)., Alton Neal Sparks Jr

LSU Historical Dissertations and Theses

Experiments conducted in soybean, Glycine max (L.) Merrill, fields in 1983 and 1984 demonstrated that damage by both adults and nymphs of the second generation of the threecornered alfalfa hopper, Spissistilus festinus (Say), on soybean (third generation of the year) contribute to yield reduction. Results indicated nymphs were responsible for 45-60% of the total yield reduction. The vertical beat sheet, ground cloth, and beat net techniques for sampling S. festinus nymphs were evaluated in soybean fields utilizing systematic and random sampling. Based on the proportion of the population sampled, the relative variation, and regression on subsequent adult counts, the best …

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Model Reduction Of Stochastic And Deterministic Continuous Time Linear Systems (Lypunov Equation, Schawrz Approximation)., Khier Benmahammed Jan 1986

Model Reduction Of Stochastic And Deterministic Continuous Time Linear Systems (Lypunov Equation, Schawrz Approximation)., Khier Benmahammed

LSU Historical Dissertations and Theses

Two new approaches for reducing the order of large scale continuous systems are presented. The first approach is a modified version of the aggregation technique. It uses the matching properties of the steady state output covariance and the Markov parameters of the high order system to those of the r('th) order model. This approach also uses a new algorithm derived for the computation of the controllability and observability Grammians, to produce controllable, observable and stable low order models. These is no unique method available for evaluating the aggregation matrix or the matrix relating the system state vector to the model …

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Contribution To Power System Harmonic Analysis., Yahia Baghzouz Jan 1986

Contribution To Power System Harmonic Analysis., Yahia Baghzouz

LSU Historical Dissertations and Theses

In recent years, power system harmonic levels have increased significantly due to the ever-increasing use of nonlinear loads which primarily consist of power electronic devices. The effect of these harmonics on power system components represents a serious problem to utility companies and consumers. A survey of power system harmonics as generated mainly by static ac/dc power converters is presented. Aspects concerning harmonic injection, their effects on system components and harmonic reduction techniques are included. Harmonic analysis methodologies are discussed and compared in terms of efficiency and accuracy. The need of a stochastic treatment of harmonic voltages and currents is clearly …

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