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The Effects Of Social Constraints On Peer Evaluation., Charlotte Mcinnis Curtis Jan 1996

The Effects Of Social Constraints On Peer Evaluation., Charlotte Mcinnis Curtis

LSU Historical Dissertations and Theses

Writers unable to improve their own work benefit when an outside reader suggests revision strategies, but what constraints shape the advice students give? This research presents a descriptive/naturalistic study of how students in one composition class viewed peer evaluation. The research explores how students' expectations of the procedure shape their comments and presents a system to code comments for revision/praise content. It considers nine editors' responses to the same essays. The Flower et al. three-part self-revision categories were modified and expanded to code editors' comments: those that referenced an essay's basic features ("thesis") were coded revision level (RL) 1; comments …

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Impact Of Insecticides On Predators Of The Soybean Looper, Pseudoplusia Includens (Walker)., Michael Lynn Boyd Jan 1996

Impact Of Insecticides On Predators Of The Soybean Looper, Pseudoplusia Includens (Walker)., Michael Lynn Boyd

LSU Historical Dissertations and Theses

Insecticide toxicity to hemipteran predators (i.e. Geocoris punctipes (Say), Nabis capsiformis Germar, Nabis roseipennis Reuter, and Podisus maculiventris (Say)) was evaluated using three different routes of insecticide exposure (direct contact, indirect insecticide toxicity through consumption of treated prey, and residue uptake). Pirate 3SC$\sp\circler$ (chlorfenapyr) had direct contact toxicity equal to Ambush 2E$\sp\circler$ (permethrin) and Methyl Parathion 4E$\sp\circler$ to most hemipteran predators tested. Exposure to foliage treated with Proclaim 0.16E$\sp\circler$ (emamectin benzoate) usually resulted in lower mortality as compared to Pirate. Condor OF 100F$\sp\circler$ (Bacillus thuringiensis) had the lowest contact toxicity to hemipteran predators of all insecticides tested. Pirate at 0.224 …

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Cloning, Sequencing And Regulation Of The Rhodobacter Capsulatusheme Gene., Georgia Ineichen Jan 1996

Cloning, Sequencing And Regulation Of The Rhodobacter Capsulatusheme Gene., Georgia Ineichen

LSU Historical Dissertations and Theses

In Rhodobacter capsulatus, a purple nonsulfur bacterium, the tetrapyrrole pathway yields four end products: siroheme, vitamin B12, heme and bacteriochlorophyll. Growth of R. capsulatus under low oxygen tension increases carbon flow through the tetrapyrrole pathway up to 100 fold. The mechanism(s) for this regulation is currently unknown. One regulatory mechanism could be transcriptional control of one or more of the genes in the common portion of the tetrapyrrole pathway. The fifth gene in the pathway, hemE, has been cloned by complementation of an Escherichia coli hemE::miniTn10 mutant. Sequence data of hemE revealed the presence of an upstream palindrome that is …

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Diagnosing Adhd In Adolescence: An Analysis Of Symptom Presentation And Comorbidity., Larissa Kay Kern Jan 1996

Diagnosing Adhd In Adolescence: An Analysis Of Symptom Presentation And Comorbidity., Larissa Kay Kern

LSU Historical Dissertations and Theses

The diagnosis of Attention Deficit Hyperactivity Disorder (ADHD) in adolescents poses a challenge for clinicians and researchers. Given the decline in hyperactivity and increased behavioral inhibition in adolescence, the differential diagnosis between ADHD and internalizing disorders becomes difficult. In addition, the high comorbidity rates found in adolescents with ADHD further complicate diagnostic decisions. The present study examines the diagnostic efficiency of the DSM-IV criteria for ADHD in a large sample of adolescents aged 11 to 17 years. The results suggest that Inattentive symptoms are more useful for classifying ADHD in adolescents than Hyperactive/Impulsive symptoms. However, Inattentive symptoms also misclassify a …

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Amorphization And Fracture In Silicon Selenium(2) Nanowires: Molecular-Dynamics Simulations On Parallel Computer Architectures., Wei Li Jan 1996

Amorphization And Fracture In Silicon Selenium(2) Nanowires: Molecular-Dynamics Simulations On Parallel Computer Architectures., Wei Li

LSU Historical Dissertations and Theses

The primary goal of this dissertation is to investigate the structural and mechanical properties and dynamical fracture in SiSe$\sb2$ nanowires using the molecular-dynamics (MD) simulation technique. The present work is the first study of SiSe$\sb2$ nanowires. Large-scale simulations reported in this thesis are carried out with parallel multiresolution schemes for the long-range Coulomb and the three-body covalent potentials. The multiresolution scheme reduces the computational complexity from O(N$\sp2$) to O(N). Using an effective interatomic potential containing both 2- and 3-body interactions, MD simulations are performed for SiSe$\sb2$ nanowires composed of finite (1-64) number of chains. Under small uniaxial strain, the nanowires …

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Structure And Organization In Rands' Work "...Body And Shadow...'' And An Original Composition For Violin And Orchestra., Peter Fischer Jan 1996

Structure And Organization In Rands' Work "...Body And Shadow...'' And An Original Composition For Violin And Orchestra., Peter Fischer

LSU Historical Dissertations and Theses

The dissertation consists of two parts: an analysis project: "Organization and Structure in Rands' Work " ... body and shadow ... "," a work for large orchestra in two movements by Bernard Rands; and an original composition: Concerto for Violin and Orchestra. The analysis of " ... body and shadow ... " is divided into five sections. Section I introduces the work. Section II discusses the distinctive opening timpani solo and overviews the form of the two movements that follow, including reductive analyses. Section II also discusses surface textures of the music, including timbre, sustained sonorities, motion in homorhythmic polyphony, …

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The Effects Of Analytic Reading Skills On Sixth Graders' Ability To Solve Mathematical Story Problems., Linda Hale Eilers Jan 1996

The Effects Of Analytic Reading Skills On Sixth Graders' Ability To Solve Mathematical Story Problems., Linda Hale Eilers

LSU Historical Dissertations and Theses

The purpose of the present study was to determine the effects of two levels of instructional treatment on sixth graders' ability to solve mathematical story problems. The two levels of instructional treatment were instruction in the use of graphic organizers in conjunction with specific analytic reading skills and instruction in specific analytic reading instruction alone. These were compared to the absence of either treatment. The steady decline in students' scores on measures of ability to read and solve story problems over the past decade prompted research in three sixth-grade public school classes in northeast Louisiana. The study employed an experimental/control, …

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Importance Of A Siderophore In The Pathogenesis And Virulence Of Photobacterium Damsela Subsp. Piscicida In Hybrid Striped Bass (Morone Saxatili X Morone Chrysops)., John Phillip Hawke Jan 1996

Importance Of A Siderophore In The Pathogenesis And Virulence Of Photobacterium Damsela Subsp. Piscicida In Hybrid Striped Bass (Morone Saxatili X Morone Chrysops)., John Phillip Hawke

LSU Historical Dissertations and Theses

Photobacterium damsela subsp. piscicida, formerly Pasteurella piscicida, is an important new pathogen of hybrid striped bass cultured in brackish water on Louisiana mariculture farms. Louisiana isolates compared with strains of P. damsela subsp. piscicida from Greece, Japan, Israel and Chesapeake Bay, USA and were found to be identical in biochemical phenotype and enzymic activity. Small plasmids of 8 and 5 kb were unique to Louisiana strains. Sequential daily bacteriology and histopathology on hybrid striped bass experimentally infected by immersion revealed that following high doses (13,000 CFU/ml) the gills and spleen are colonized first as early as 24 hours PI, followed …

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A Hierarchical Approach To Equilibrium Cycle Nuclear Fuel Analysis., Jon Juneau Jan 1996

A Hierarchical Approach To Equilibrium Cycle Nuclear Fuel Analysis., Jon Juneau

LSU Historical Dissertations and Theses

This research involved developing an expert system that allows a nuclear fuel engineer to quickly provide answers to strategic nuclear fuel management questions, which are typically broad based. Current nuclear fuel analysis research concentrates on getting more accurate and precise answers at the expense of using large computer programs to get answers that are too specific to answer the broad based questions. The expert system brings together several artificial intelligence techniques to allow a nuclear fuel engineer to consider several scenarios in a general way in order to quickly answer the fuel management questions asked. The expert system is based …

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Groundwater Flow With Heat And Solute Transport In Sedimentary Basins., Guichang Lin Jan 1996

Groundwater Flow With Heat And Solute Transport In Sedimentary Basins., Guichang Lin

LSU Historical Dissertations and Theses

Numerical experiments were undertaken to understand (1) heat and fluid transport in an uplifted foreland basin where fluid flow is driven by topographic gradient, and (2) effects of expulsion of geopressured fluids on the thermodynamic system in salt basins. Thermal evolution of an uplifted foreland basin is strongly affected by thermal buffering of basement rocks. Thermal buffering by basement rocks does not permit constant heat flow along the sediment-basement contact, in contrast to many previous numerical studies. Ignoring basement effects can result in serious errors in temperature prediction, such as a false transient thermal pulse in the discharge area. Carbonaceous …

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Poverty And Social Control In Early Modern England: Exeter, 1558-1625., Connie S. Evans Jan 1996

Poverty And Social Control In Early Modern England: Exeter, 1558-1625., Connie S. Evans

LSU Historical Dissertations and Theses

Poverty has always been, and continues to be, one of the most pressing social problems, and one to which a number of solutions have been proposed through the ages. The present work is an examination of the problem and the responses to it in early modern England, and is set in the local context of the city of Exeter. Prior to the reign of Elizabeth I, the majority of poor law legislation was punitive in nature. rather than rehabilitative. That the nature of poor law legislation changed under Elizabeth was due to a number of factors, not least of which …

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Connecting Reading To Writing: At-Risk Readers' Comprehension Acquisition Via Discussion Groups With Active Readers., Jane Ann Medver Jan 1996

Connecting Reading To Writing: At-Risk Readers' Comprehension Acquisition Via Discussion Groups With Active Readers., Jane Ann Medver

LSU Historical Dissertations and Theses

The purpose of this study was to explore an alternative method of comprehension acquisition for at-risk readers. This study examined the following aspects of a classroom reading program as it pertained to the at-risk reader: (a) an overview of at-risk behaviors, (b) the reading/writing connection, (c) reading methods and philosophies, (d) grouping techniques, and (e) comprehension acquisition. The focus of the study was to investigate the actions of four at-risk readers as they interacted with active readers (peers) in flexible, heterogenous groups in order to discuss and comprehend text. By providing in-depth descriptions of the four at-risk readers, this study …

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The "Sacred Harp" In The Urban North: 1970-1995., Mark David Johnson Jan 1996

The "Sacred Harp" In The Urban North: 1970-1995., Mark David Johnson

LSU Historical Dissertations and Theses

In 1994 the Sacred Harp, a southern, shape-note tunebook, entered its 150th year of continuous use. First compiled in 1844 by B. F. White and E. J. King, and updated numerous times, The Sacred Harp books in the "Denson" tradition, including The Sacred Harp: 1991 Edition, are today the most popular and widely used twentieth-century revisions of any nineteenth-century tunebook. Sacred Harp singing has been a largely rural, Southern tradition and in the years between 1844 and the early 1970s several hundred separate singings were founded, many of which continue to be active. In the early 1990s the Sacred Harp …

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Xanthomonas Albilineans Detection, Identification And Infectivity Titration In Sugarcane., Silvio Aparecido Lopes Jan 1996

Xanthomonas Albilineans Detection, Identification And Infectivity Titration In Sugarcane., Silvio Aparecido Lopes

LSU Historical Dissertations and Theses

A PCR method with primers for t-RNA gene spacers was used for detection of Xanthomonas albilineans (Xa), the causal agent of leaf scald disease of sugarcane. A DNA segment of approximately 170 bp was amplified for Xa strains, but also for X. campestris pv. campestris, X. campestris pv. translucens and two sugarcane bacterial endophytes. Good agreement between PCR and isolation to detect Xa from sugarcane sap was observed. PCR was faster allowing pathogen detection in less than one day. Both methods resulted in low detection frequencies from asymptomatic plants, which may contain Xa below detection limits. The lowest limit for …

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Reflection On Teaching: An Ethnographic Study Of Preservice Teachers' Beliefs And Practices., Thomasine Haskins Mencer Jan 1996

Reflection On Teaching: An Ethnographic Study Of Preservice Teachers' Beliefs And Practices., Thomasine Haskins Mencer

LSU Historical Dissertations and Theses

The purpose of this study was to explore the relationship between preservice teachers' expressed beliefs, their practices, and how they described the two. Particular emphasis was given to factors that influenced the preservice teachers' expectations of students. The preservice teachers were in the graduate year of a five year teacher education program that embraced reflective practice. In many ways, the two preservice teachers conformed to the mold of the typical American teacher in that they were middle class, Anglo Saxon, females who were high achievers from small towns. However, the pair differed in their experiences with diversity. The preservice teachers' …

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Discontinuous Technological Change And Institutional Legitimacy: A Morphological Perspective., Robert Nicholas Mcgrath Jan 1996

Discontinuous Technological Change And Institutional Legitimacy: A Morphological Perspective., Robert Nicholas Mcgrath

LSU Historical Dissertations and Theses

Technological innovation is an important consideration to many strategic managers and thus is important to research in Strategic Management. Deepening the field's understanding of what technology is and how it works can be facilitated by participating in a growing dialogue between the Strategic Management and Management of Technology communities. This dissertation considers elements of both fields and examines the premise that at the industry level, incumbents act to manipulate the "share of mind" or "cognitive legitimacy" of the performance and cost/price characteristics of product-technology innovations that, in aggregate, portend to either enhance or destroy prevailing industry competences. A forecasting technique …

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Effect Of Diet On Respiratory Fuel Mixture, Insulin Sensitivity, And Autonomic Nervous System Function., Heli J. Roy Jan 1996

Effect Of Diet On Respiratory Fuel Mixture, Insulin Sensitivity, And Autonomic Nervous System Function., Heli J. Roy

LSU Historical Dissertations and Theses

Introduction. A high amount of dietary fat has been shown to have a negative effect on metabolism, causing insulin resistance, weight gain, and other metabolic alterations. Several studies have found a direct link between lack of activity and obesity. Purpose. The purpose of this study was to see if a diet had an effects on insulin sensitivity, autonomic nervous system function, and substrate utilization as predicted by Flatt, in healthy young men. Subjects. The subjects studied were 6 nonathletes (NA), 6 aerobically trained (AT), and 5 weight trained (WT) men. Their body mass index (BMI) was 22.1 $\pm$ 2.92 kg/m$\sp2$ …

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An Introduction To The Songs Of Miriam Gideon (B. 1906)., W. Loraine Sims Jan 1996

An Introduction To The Songs Of Miriam Gideon (B. 1906)., W. Loraine Sims

LSU Historical Dissertations and Theses

American composer Miriam Gideon (b. 1906) has earned a place as a prominent exponent of American art song through her contribution of high quality works for the genre. This study deals with ten songs chosen to represent her piano/vocal solo songs which span her compositional life from 1937-1987. Individual studies of each song have been approached from a performer's vantage point, as prepared for a Lecture/Recital. The songs are: Lockung (1937), Vergiftet sind meine Lieder (1937), She Weeps Over Rahoon (1939), Gone in Good Sooth You Are (SONNETS FROM "FATAL INTERVIEW, 1952), Epitaph for a Wag in Mauchline (EPITAPHS FROM …

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A Methodology To Assess Safety Conditions In Louisiana Agriscience Laboratories., Julio Alcibiades Melendez Jan 1996

A Methodology To Assess Safety Conditions In Louisiana Agriscience Laboratories., Julio Alcibiades Melendez

LSU Historical Dissertations and Theses

The safety conditions of the agriscience laboratories of the high schools of the State of Louisiana have not been studied extensively. This study was undertaken to develop a methodology to assess these conditions. The Southeastern region of the state was selected as the research area. Forty four high schools in this area have agriscience laboratories. Forty one of these laboratories were assessed. A Hypothesized Survey Model was made up from the background information searched. This model was validated at another school region and used to design a Research Survey Model. This RSM was face and field validated. Safety ratings were …

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Variability Of Eddy Heat Fluxes Over The Northwestern Gulf Of Mexico., Varis Ransibrahmanakul Jan 1996

Variability Of Eddy Heat Fluxes Over The Northwestern Gulf Of Mexico., Varis Ransibrahmanakul

LSU Historical Dissertations and Theses

Eddy heat flux variability over the Louisiana-Texas shelf was investigated using satellite-derived surface velocity and temperature data between October 1993 and October 1994. Assuming the product of sea water density and specific heat is relatively constant, velocity-temperature covariance reflects eddy heat flux (the fluctuating part of the 1 x 1 degree, 90 day mean heat flux). Available velocity and temperature fields, however, are not synchronous. Temperature "observations" at velocity positions were optimally estimated using the Gauss Markoff Theorem. The error-estimate is comparable to the error resulting from the application of the widely accepted SST correction algorithm. The trend that instantaneous …

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Inflammatory Responses Of The Jird To Brugia Pahangi: Parasite Stage Specificity And Role Of The Macrophage., Carmen Nasarre Jan 1996

Inflammatory Responses Of The Jird To Brugia Pahangi: Parasite Stage Specificity And Role Of The Macrophage., Carmen Nasarre

LSU Historical Dissertations and Theses

The host systemic and peritoneal inflammatory responses against different stages of Brugia pahangi were compared in intraperitoneally infected-jirds. Systemic inflammatory responses were assessed by measuring the pulmonary granulomatous response to B. pahangi antigen-coated beads (PGRN). Peritoneal inflammation was characterized by enumeration of different cell types in peritoneal exudates following infection. Further, the toxoplasmacidal activity and TNF-$\alpha$-like production of peritoneal macrophages were also characterized. Infection with L3, L4, male worms, female worms, microfilariae (MF) or dead adult worms induced a rapid PGRN. This response decreased to levels of controls in jirds inoculated with living parasites at the chronic time period, indicating …

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Micellar Electrokinetic Remediation Of Tnt From Soil., Mohd Raihan Taha Jan 1996

Micellar Electrokinetic Remediation Of Tnt From Soil., Mohd Raihan Taha

LSU Historical Dissertations and Theses

An assessment of the feasibility of micellar electrokinetic (EK) remediation of TNT from soils is presented. Batch solubilization tests and bench scale EK tests were conducted to select the best candidate surfactant and to evaluate the efficiency of removal of TNT from a real world soil. From batch tests, it was found that SDS gave the best desorption results among a group of candidate surfactants, which includes DOWFAX 8390 (anionic), Tween 80 and Brij 35 (nonionic) and CTAB and CTAC (cationic). Unenhanced and surfactant enhanced EK tests was unable to move substantial amounts of TNT across the specimen to the …

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Modeling Physical And Chemical Nonequilibrium Transport Of Herbicide In Soils From Different Tillage Systems., Shikui Xue Jan 1996

Modeling Physical And Chemical Nonequilibrium Transport Of Herbicide In Soils From Different Tillage Systems., Shikui Xue

LSU Historical Dissertations and Theses

The physical and chemical nonequilibrium transport of alachlor were studied in a surface Gigger soil from different tillages through tracer studies, and batch and miscible displacement experiments. Batch experiments indicated initially fast reaction followed by slow adsorption. Adsorption and desorption results indicated time dependent hysteretic behavior and was best described by a multireaction model incorporating nonlinear equilibrium reaction, a reversible kinetic mechanism, and a consecutive irreversible mechanism. The model predicted alachlor hysteresis and adsorption-desorption kinetics satisfactorily based on parameters obtained from adsorption experiments. Tracer (Eosin Y and Blue FCF dyes) studies showed non-uniformly stained areas in undisturbed soil cores (6.4 …

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Pilot-Scale Solvent Sublation For The Removal Of Hydrophobic Compounds From Wastewaters., Jeffrey Scott Smith Jan 1996

Pilot-Scale Solvent Sublation For The Removal Of Hydrophobic Compounds From Wastewaters., Jeffrey Scott Smith

LSU Historical Dissertations and Theses

Solvent sublation is a nonfoaming adsorptive bubble process which exploits the surface active nature of organic compounds in their removal from aqueous systems. Gas bubbles are introduced into an aqueous media and are buoyed upward to an immiscible organic solvent. As the bubbles rise, organic materials are selectively adsorbed from the aqueous phase and transported to the overlying, quiescent solvent layer. This dissertation studied three-phase, continuous solvent sublation of pyrene and pentachlorophenol from simulated wastewater at the pilot-scale. Steady-state removal efficiencies as high as 96% for pyrene and 94% for pentachlorophenol were demonstrated and were significantly greater than the corresponding …

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The Role Of Seed Banks, Disturbance, And Sea Level Rise In Determining The Plant Community Structure Of Oligohaline Coastal Marshes., Andrew Hamilton Baldwin Jan 1996

The Role Of Seed Banks, Disturbance, And Sea Level Rise In Determining The Plant Community Structure Of Oligohaline Coastal Marshes., Andrew Hamilton Baldwin

LSU Historical Dissertations and Theses

Coastal wetlands worldwide are threatened by sea level rise, which is expected to affect the growth and survival of wetland vegetation by increasing water level and salinity. While the effects of salinity and inundation on adult vegetation of oligohaline marshes have been widely studied, the species composition of the seed bank and its response to elevated salinity and water level have not been examined. Additionally, the role of disturbances of different intensities in structuring marsh plant communities and possible interactions between disturbance and rising sea level have received little attention. Disturbances in coastal marshes include nonlethal disturbances such as fire …

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The Impact Of Total Sleep Deprivation On Neuropsychological Functioning., Paul Gale Binks Jan 1996

The Impact Of Total Sleep Deprivation On Neuropsychological Functioning., Paul Gale Binks

LSU Historical Dissertations and Theses

Extended sleep deprivation has been shown to produce impairments in sustained attention and vigilance, especially if the deprivation period is greater than 48 hours. However little is known about the effects of sleep deprivation on performance of cognitive tasks considered to be measures of higher cortical functioning such as cognitive flexibility and the capacity to shift response set. These two activities are associated with intact functioning of the frontal lobes of the cerebral cortex while attention and vigilance tasks are not considered to be part of this type of cognitive activity and are not associated with frontal lobe function. One …

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The Relationship Of Hemolymph Sugar, Juvenile Hormone And Biogenic Amines To The Three Behavioral States Of Mature Honey Bees., Janko Bozic Jan 1996

The Relationship Of Hemolymph Sugar, Juvenile Hormone And Biogenic Amines To The Three Behavioral States Of Mature Honey Bees., Janko Bozic

LSU Historical Dissertations and Theses

Differences in sugar titers, JH synthesis rate and biogenic amine metabolism correlated with three distinct activity groups or mature bees: resting bees, followers and dancers. Dancers had lower trehalose titers than followers or resting bees. In absconding bees trehalose titers were even lower, due to greatly elevated locomotor activity. The collecting and transferring of food by dancers and followers resulted in a higher glucose titer than in resting bees. Followers had a higher-JH synthesis rate than dancers, suggesting that JH could be an internal motivational stimulus to recruit followers to forage. Dancers and followers collect and transfer food and therefore …

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Work Motivation And Perceived Organizational Effectiveness In Middle Schools., Cynthia Young Wren Jan 1996

Work Motivation And Perceived Organizational Effectiveness In Middle Schools., Cynthia Young Wren

LSU Historical Dissertations and Theses

The primary purpose of this study was to determine the linkage between work motivation derived from the expectancy theory and perceived organizational effectiveness derived from the Parsonian framework. School characteristics of community type, school size, and school socioeconomic status were used as predictor variables in the study. A secondary purpose was to examine these linkages in middle schools and to examine changes over time. Mixed methodologies, including quantitative and qualitative research techniques, were employed. The data were analyzed using the school and the individual teacher as units of analyses. To test the hypotheses, a multiple regression procedure was employed. The …

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Robust Sensor Fusion Algorithms: Calibration And Cost Minimization., Richard Ree Brooks Jan 1996

Robust Sensor Fusion Algorithms: Calibration And Cost Minimization., Richard Ree Brooks

LSU Historical Dissertations and Theses

A system reacting to its environment requires sensor input to model the environment. Unfortunately, sensors are electromechanical devices subject to physical limitations. It is challenging for a system to robustly evaluate sensor data which is of questionable accuracy and dependability. Sensor fusion addresses this problem by taking inputs from several sensors and merging the individual sensor readings into a single logical reading. The use of heterogeneous physical sensors allows a logical sensor to be less sensitive to the limitations of any single sensor technology, and the use of multiple identical sensors allows the system to tolerate failures of some of …

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Pseudospin Symmetry In Heavy Deformed Nuclei., Andrey L. Blokhin Jan 1996

Pseudospin Symmetry In Heavy Deformed Nuclei., Andrey L. Blokhin

LSU Historical Dissertations and Theses

The origin and validity of pseudospin symmetry, which is characteristic for heavy atomic nuclei ($A \ge 100$), are discussed. The transformation to the pseudospin representation for physically significant operators is performed by means of specially designed analytical techniques. The many-particle helicity operator is found to accomplish the transformation to the pseudospin basis in the scope of realistic nuclear models. Estimates based on both nonrelativistic mean-field and relativistic Dirac-Brueckner results show that in the helicity-transformed space nucleons move in a finite-depth, strongly nonlocal, potential with an effectively reduced spin-orbit strength. Since the chirality operation is the limiting case of the helicity …

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