Open Access. Powered by Scholars. Published by Universities.®

Digital Commons Network™

Open Access. Powered by Scholars. Published by Universities.®

Louisiana State University

Discipline
Keyword
Publication Year
Publication
Publication Type
File Type

Articles 31381 - 31410 of 45265

Full-Text Articles in Entire DC Network

Dry Matter Accumulation By The Start Of Seed Filling As A Criterion For Yield Optimization In Soybean, Harikrishna Modali Jan 2004

Dry Matter Accumulation By The Start Of Seed Filling As A Criterion For Yield Optimization In Soybean, Harikrishna Modali

LSU Doctoral Dissertations

Identification of criteria for predicting soybean [Glycine max (L.) Merril] yield would provide farmers with useful management tools. Such criteria not only help in predicting the yield potential but also aid the farmer in determination of environmental factors limiting crop yield. Since a certain total dry matter (TDM) level is expected to optimize yield and R5 marks the end of the period for vegetative TDM accumulation, TDM(R5) is a good putative criterion for optimal yield. Determination of yield components important in yield formation helps to substantiate TDM(R5) as a criterion for optimum yield, since they are formed during discrete periods …

Go to article

Multifunctional Nanocomposite Co-Containing Diamondlike Carbon Thin Films, Fengli Wang Jan 2004

Multifunctional Nanocomposite Co-Containing Diamondlike Carbon Thin Films, Fengli Wang

LSU Doctoral Dissertations

Metal-containing, hydrogenated carbon films (Me-a-C:H) is a special class of nanocomposite films of particular interest since they can be multifunctional through the synergistic interaction of their individual components. Thus, nanocomposite thin films possess high potential in a wide field of engineering applications, especially in small scale devices. A series of multifunctional nanocomposite Co-a-C:H thin films have been synthesized by a hybrid chemical vapor deposition (CVD) and physical vapor deposition (PVD) process to uncover the relationship between synthesis, microstructure and properties. The effects of deposition parameters on the microstructural evolution and properties have been systematically studied. The results showed that the …

Go to article

The Effects Of Inorganic And Organic Selenium Sources On Growth Performance, Carcass Traits, Tissue Mineral Concentrations, And Enzyme Activity In Poultry, Robert L, Iii Payne Jan 2004

The Effects Of Inorganic And Organic Selenium Sources On Growth Performance, Carcass Traits, Tissue Mineral Concentrations, And Enzyme Activity In Poultry, Robert L, Iii Payne

LSU Doctoral Dissertations

The purpose of this research was to compare dietary inorganic and organic Se sources in poultry. An experiment was conducted to assess daily egg production and Se deposition in eggs of hens fed diets supplemented with inorganic or organic Se. The results from this experiment indicated that hen production was not affected by Se source, and organic Se increased egg Se concentrations more than inorganic Se. Two experiments then were conducted with broilers to compare dietary organic and inorganic Se on growth performance, carcass traits, breast and plasma Se concentrations, and plasma glutathione peroxidase activity. The results from these experiments …

Go to article

Characteristics Of An Effective Teacher Of Reading In An Elementary School Setting, Jennifer Aby Archer Jan 2004

Characteristics Of An Effective Teacher Of Reading In An Elementary School Setting, Jennifer Aby Archer

LSU Doctoral Dissertations

Struggling readers have been the central focus of American politics for decades. Teachers of all ages and experiences across America deliver reading instruction in a variety of ways. The purpose of this study is to determine the characteristics of an effective teacher of reading in an elementary classroom setting. The study was conducted in a public and a private sector school in a capital city in the southern United States. Two principals, two second grade teachers, and two fourth grade teachers were participants in this study. A qualitative research focus provided the methodological basis for this study. The research design …

Go to article

Utility Of The Implementation Of Programmatic Systems To Reduce And Eliminate Restraint Use For The Treatment Of Problem Behaviors With Individuals With Mental Retardation, Yemonja Smalls Jan 2004

Utility Of The Implementation Of Programmatic Systems To Reduce And Eliminate Restraint Use For The Treatment Of Problem Behaviors With Individuals With Mental Retardation, Yemonja Smalls

LSU Doctoral Dissertations

Persons with mental retardation continue to remain one of society’s most vulnerable groups as the number of individuals served increases and non-proportional resources are allotted to take of their needs. With results of national investigations indicating widespread indiscriminate abuse of restraints and overmedication to manage dangerous behaviors, federal mandates have been initiated to ensure ethical, safe and clinically sound use of these techniques. This study addressed the implementation of systemic changes that included a restraint education program and policy changes, careful monitoring and review of restraint and behavioral programming by oversight review bodies, and intense training of preventative and de-escalation …

Go to article

The Production Of A Dextran Binding Antibody By Phage Display Library And Its Applications To Sugar Processing, Duwoon Kim Jan 2004

The Production Of A Dextran Binding Antibody By Phage Display Library And Its Applications To Sugar Processing, Duwoon Kim

LSU Doctoral Dissertations

A phage collection (M1114), which is a mixture of two collections, M710-3R and Silica 426 each derived from a human synthetic phage antibody library (Fab 2lox), was used further enriched for dextran binding using enzyme-linked immunosorbent assays (ELISA) screening. The effects of dextran concentration on phage binding affinity were tested using indirect sandwich ELISA on phage collections, M1114-m74 and AE-M1114-m74-2R. Most of the phage bound to dextran (T2000) coated on a sandwich ELISA. The combination of ELISA screening and a sephadex columns enriched dextran binding 7 fold over enrichment by a single ELISA screen. Phage collection (M1114-m74) produced by combination …

Go to article

Interactions Of Insect Herbivory And Multiple Abiotic Stress Agents On Two Wetland Tree Species In Southeast Louisiana Swamps, Rebecca Faye Souther-Effler Jan 2004

Interactions Of Insect Herbivory And Multiple Abiotic Stress Agents On Two Wetland Tree Species In Southeast Louisiana Swamps, Rebecca Faye Souther-Effler

LSU Doctoral Dissertations

Forested wetlands in Louisiana are hydrologically isolated from the Mississippi River, impounded by manmade structures, impacted by saltwater intrusion, and are sinking, resulting in more frequent flooding for longer periods. Additionally, defoliation of the two dominant trees, baldcypress (Taxodium distichum L. Rich) and water tupelo (Nyssa aquatica L.), occur frequently during spring. In Louisiana, the baldcypress leafroller, BCLR, (Archips goyerana Kruse) and the forest tent caterpillar, FTC, (Malacosoma disstria Hubner) defoliate up to 120,000ha of baldcypress-tupelo swamps. Restoration plans call for reintroducing Mississippi River water (diversions) to increase sediment elevation, promote natural regeneration, and enhance primary and secondary productivity. In …

Go to article

A Case Study Of A University-School Partnership: Impacting The Success Of Children, Teacher Candidates, And Inservice Teachers, Paula Summers Calderon Jan 2004

A Case Study Of A University-School Partnership: Impacting The Success Of Children, Teacher Candidates, And Inservice Teachers, Paula Summers Calderon

LSU Doctoral Dissertations

School reform is an often heard term within the Bush administration. Since the signing of his No Child Left Behind Act of 2001 (NCLB), President George W. Bush set out to make certain our teachers are highly qualified and that our children perform better in school. From the Holmes Group (1986) to present-day mandates from The National Council for Accreditation of Teacher Education (NCATE), university-school partnerships are becoming part of preservice teacher education as well as school reform. This study describes a pilot university-school partnership, focusing on teacher candidates, inservice teachers, and P-5 students. Employing qualitative and quantitative analysis (Gall, …

Go to article

The Road To Redevelopment: New Urbanism, Nostalgia, And The Process Of Downtown Revitalization In Baton Rouge, Louisiana, Jennifer Speights-Binet Jan 2004

The Road To Redevelopment: New Urbanism, Nostalgia, And The Process Of Downtown Revitalization In Baton Rouge, Louisiana, Jennifer Speights-Binet

LSU Doctoral Dissertations

This qualitative study focuses on a planning process in Baton Rouge, Louisiana called Plan Baton Rouge, which began in the summer of 1998 and continues through the present. The overriding goal of the Plan Baton Rouge process is to revitalize downtown Baton Rouge and promote economic and cultural vitality while implementing the design practices of New Urbanism. New Urbanism is a design methodology that condemns suburban sprawl while promoting denser, early-twentieth-century-style townscapes and urban centers, focusing on mixed land use, pedestrianism, and aesthetic and architectural continuity. Through participant observation, this ethnographic account of New Urbanism in practice provides an in-depth …

Go to article

Numerical Simulation And Field Verification Of Inclined Piezocone Penetration Test In Cohesive Soils, Lei Wei Jan 2004

Numerical Simulation And Field Verification Of Inclined Piezocone Penetration Test In Cohesive Soils, Lei Wei

LSU Doctoral Dissertations

A large strain finite element analysis is performed to analyze the effect of soil anisotropy on the inclined piezocone penetration test in normally consolidated cohesive soils. The piezocone penetration is numerically simulated using the commercial finite element code ABAQUS. The saturated clay is modeled as a two-phase material and the effective stress principle is used to describe its behavior. A frictional contact interface utilizing Mohr-Coulomb's theory was chosen to represent interactions between the surface of the cone and the soil. The Anisotropic Modified Cam Clay Model (AMCCM) by Dafalias (1987) was chosen and implemented into ABAQUS through user subroutine UMAT. …

Go to article

Martin Heidegger, Emmanuel Levinas, And The Politics Of Dwelling, David James Gauthier Jan 2004

Martin Heidegger, Emmanuel Levinas, And The Politics Of Dwelling, David James Gauthier

LSU Doctoral Dissertations

The late modern and postmodern theme of homecoming permeates the philosophy of Martin Heidegger, who grapples with the topic throughout the various phases of his lifelong meditation on Being. Heidegger continually gave thought to the relationship between Being and the place or site in which it becomes manifest, whether it is a system of references and manipulable entities (Being and Time), language (An Introduction to Metaphysics), or aesthetic works of art (“The Origin of the Work of Art”). Taking as its point of departure Heidegger’s persistent and dynamic search for home (Heimat), this study will examine the political implications of …

Go to article

The Relationship Between Social Behavior And Mealtime Behavior Problems In Individuals With Severe And Profound Mental Retardation, David E. Kuhn Jan 2004

The Relationship Between Social Behavior And Mealtime Behavior Problems In Individuals With Severe And Profound Mental Retardation, David E. Kuhn

LSU Doctoral Dissertations

One of the defining features of mental retardation is a problem in adaptive functioning. An area of adaptive skills commonly deficient in this population is social functioning, often characterized as behaviors that provide individuals with the means to interact effectively and appropriately with others. Researchers in this area have generally focused on improving appropriate social behavior and/or decreasing behavioral excesses that interfere with social interactions. Few studies have examined the effects of improving social behavior on collateral behaviors. The current study examined the relationship between social behavior and feeding and mealtime problem behavior in individuals with mental retardation. Individuals across …

Go to article

Soils Of Regeneration: Exploring Conceptualizations Of The Natural World As A Context For An Ecologically-Sensitive Curriculum, Emily A. Demoor Jan 2004

Soils Of Regeneration: Exploring Conceptualizations Of The Natural World As A Context For An Ecologically-Sensitive Curriculum, Emily A. Demoor

LSU Doctoral Dissertations

David Orr (1994) asserts that the ecological crisis is a crisis of education. This study explores the relationship between the ecological crisis and education by examining the role that language plays in shaping perceptions of the natural world. Toward this end it analyzes narratives of science, literature and other disciplines that conceptualize the natural world as object and as subject. It evaluates how particular metaphors used in reference to the natural world enhance or impede ecological understanding and the cultivation of responsibility and stewardship and considers ways in which these conceptualizations might be used as a basis for new curriculum …

Go to article

American Verismo?: Insights Into The Padrone, And Opera By George Whitefield Chadwick (13 November 1854 - 4 April 1931), Jon Steffen Truitt Jan 2004

American Verismo?: Insights Into The Padrone, And Opera By George Whitefield Chadwick (13 November 1854 - 4 April 1931), Jon Steffen Truitt

LSU Doctoral Dissertations

The contribution of George Whitefield Chadwick (13 November 1854 – 4 April 1931) to American music comes in many forms: composer, teacher, conductor, pianist and organist. A leading figure of the Second School of New England composers, Chadwick was also largely responsible for the effective reorganization of the New England Conservatory. He was arguably one of the most influential teachers in American music in the latter half of the nineteenth century and the beginning of the twentieth century. This study deals with Chadwick’s last opera intended for professional production, The Padrone. The opera, an American example of Italian verismo, is …

Go to article

A Basic Interpretative Analysis Of Instrumental Music Education Majors' Approaches To Score Study In Varying Musical Contexts, Jeremy S. Lane Jan 2004

A Basic Interpretative Analysis Of Instrumental Music Education Majors' Approaches To Score Study In Varying Musical Contexts, Jeremy S. Lane

LSU Doctoral Dissertations

The purposes of this qualitative study were to 1) provide a holistic description of procedures used by undergraduate instrumental music education majors (N = 21) in music score study tasks; 2) examine relationships among these procedures and their use in varying musical contexts; 3) examine relationships among score study tendencies, education level, and overall musical ability; and 4) provide general comparisons of undergraduate music education majors’ score study procedures and those implied by expert conductors’ major disciplinary ways of thinking. Each subject participated in two one-on-one interview sessions with the investigator. During each session, subjects “thought out loud” as they …

Go to article

Synthesis And Antibacterial Assessment Of Water-Soluble Hydrophobic Chitosan Derivatives Bearing Quaternary Ammonium Functionality, Mrunal R. Thatte Jan 2004

Synthesis And Antibacterial Assessment Of Water-Soluble Hydrophobic Chitosan Derivatives Bearing Quaternary Ammonium Functionality, Mrunal R. Thatte

LSU Doctoral Dissertations

Chitosan is a naturally occurring, bio-degradable, non-toxic, non-allergenic bio-polysaccharide derived from chitin, found in abundance in nature. Studies aimed at deriving newer applications of chitosan are hence of interest. Among these, one of the focuses of investigations is aimed at excellent antimicrobial activity demonstrated by chitosan. In this context, certain quaternary ammonium derivatives of chitosan have been shown in the past to be highly effective antibacterial materials. In the present study, substituted chitosan derivatives were synthesized and further quaternized using Quat-188 to produce water soluble derivatives at neutral pH. The antibacterial assessments of the quaternized derivatives of substituted chitosan were …

Go to article

New Insights Into The Binding Site Formation And The Performance Of Molecularly Imprinted Polymers, Hyunjung Kim Jan 2004

New Insights Into The Binding Site Formation And The Performance Of Molecularly Imprinted Polymers, Hyunjung Kim

LSU Doctoral Dissertations

Molecularly imprinted polymers (MIPs) are finding important applications in the field of separation science, catalysis, sensor, and immunoassays. To optimize the performance of the MIPs, it is essential to understand the underlying mechanism of the process. This research focuses on understanding binding site formation and performance, and improvement of the MIPs. Chapter 1 introduces the concept of the MIPs, and binding isotherm and affinity distribution of heterogeneous binding sites in the MIPs. Chapter 2 describes fundamental studies conducted to understand the binding site formation of the MIPs. The number of binding sites (N) and the number average association constant (Kn) …

Go to article

The Influence Of Ethnic Embeddedness On The Gender Role Attitudes And Division Of Household Labor Of Married Hispanic Women, Susana Guerra Jan 2004

The Influence Of Ethnic Embeddedness On The Gender Role Attitudes And Division Of Household Labor Of Married Hispanic Women, Susana Guerra

LSU Doctoral Dissertations

In this study I examine the effects of both network structure and network function on the gender role attitudes and division of household labor among Hispanic women. Using a representative sub-sample drawn from the first wave of the National Study of Families and Households, I determine to what extent network processes help explain the gender role attitudes and behaviors of Hispanic women. Specifically, I focus on how embeddedness within a Hispanic community, as well as a woman’s level of social support exchange with kin and non-kin help explain her current gender role attitudes and household labor allocation. I found that …

Go to article

Assessment Of Instructional Methodologies And Student Information Processing Styles In A Terrorism Preparedness Course, William James Mccarthy Jan 2004

Assessment Of Instructional Methodologies And Student Information Processing Styles In A Terrorism Preparedness Course, William James Mccarthy

LSU Doctoral Dissertations

The focus of the research was the evaluation of two instructional methodologies for teaching terrorism preparedness at several universities in Louisiana. Participants were taught a curriculum for an audience who may work at a potential terrorist target. The purpose of the research was to determine if processing styles based instruction improved learning. The objectives of the study were to: 1) Describe participant demographics: a) age, b) gender, c) credit hours, d) field of study; and e) preferred Strategic Information Processing Style (SIPS); 2) Determine if changes occur in knowledge of terrorism preparedness as measured by the Terrorism Awareness test; 3) …

Go to article

An Analysis Of György Ligeti's Nonsense Madrigals, Dennis Malfatti Jan 2004

An Analysis Of György Ligeti's Nonsense Madrigals, Dennis Malfatti

LSU Doctoral Dissertations

While other contemporary composers have written works called madrigals, Ligeti's Nonsense Madrigals are truly unique as exemplified by the myriad of influences that went into their creation, the technical challenges of their performance, and in the aesthetic result, one which is incomparable to most musical compositions past or present including works by Ligeti himself. Ligeti’s compositional style in these works include the parodying of compositional techniques from the 14th century as well as the rhythmic provocativeness of jazz. The use of parody in these works is compatible with Ligeti’s choice of texts which includes literary parodies by Lewis Carroll. In …

Go to article

Developing Embryo Technologies For The Eland Antelope (Taurotragus Oryx), Gemechu G. Wirtu Jan 2004

Developing Embryo Technologies For The Eland Antelope (Taurotragus Oryx), Gemechu G. Wirtu

LSU Doctoral Dissertations

Assisted reproductive technologies developed in domestic cattle serve as a starting point in similar studies on nondomestic bovids. The common eland is a useful model species for studies on rare tragelaphine antelopes. In Chapter 3 of the present study, effects of components/attributes of protein-free embryo culture media on the in vitro development of in vitro-derived bovine embryos were evaluated. A 2 x 2 factorial study comparing effects of groups of amino acids (20aa or 11aa) in two base media (modified KSOM or BM-3) demonstrated that amino acids and base medium affected embryonic development. A subsequent 7 x 2 factorial experiment …

Go to article

Modeling Longleaf Pine (Pinus Palustris Mill) Wood Properties Using Near Infrared Spectroscopy, Brian Kipling Via Jan 2004

Modeling Longleaf Pine (Pinus Palustris Mill) Wood Properties Using Near Infrared Spectroscopy, Brian Kipling Via

LSU Doctoral Dissertations

This research demonstrated model development for important wood properties using near infrared spectroscopy (NIR); it considered the effect of outside sources of error, and the ability of NIR to measure fiber morphology. Strength, stiffness, and density were successfully modeled from wood samples taken throughout 10 longleaf (Pinus palustris Mill) trees. Principal components and multiple linear regression were compared for performance in prediction of density, strength, and stiffness. I found both modeling techniques to yield similar prediction accuracies. However, I found that density could be estimated through Beer-Lambert’s law since the absorbance at all wavelengths increased with density. Also, 5 of …

Go to article

Internal Revenue Service Restructuring And Reform Act Of 1998: A Test Of New Public Management, William Meriwether Vandenburgh Jan 2004

Internal Revenue Service Restructuring And Reform Act Of 1998: A Test Of New Public Management, William Meriwether Vandenburgh

LSU Doctoral Dissertations

The enactment of the 1998 Internal Revenue Service (IRS) Reform Act resulted directly from perceived lapses in the federal taxation administration, which was publicly highlighted in Congressional hearings. Congress reacted by fundamentally altering the IRS’s implementation of the Internal Revenue Code (for the first time since 1952). The Joint Committee on Taxation noted that the overall objective of the 1998 IRS Reform Act was to have “a well-run IRS [which] is critical to the operation of our tax system.” From a public administration paradigm, the IRS moved from a traditional tax management methodology to a New Public Management (NPM) methodology. …

Go to article

Evaluating International Agricultural Trade In Central America: Three Analyses, Jose Roberto Andino Jan 2004

Evaluating International Agricultural Trade In Central America: Three Analyses, Jose Roberto Andino

LSU Doctoral Dissertations

A case study framework was used to study the competitiveness of Honduran coffee with major importing partners, along with an import demand analysis. Several important points summarize the findings. First, trends in green coffee supply and consumption continue to depress world coffee prices, making the production of coffee less attractive. Since small coffee producing countries, like Honduras, cannot affect the international price, they must improve efficiency, productivity, employ cost reduction techniques, and rely on the promotion of specific product attributes to remain competitive. Second, increased market share of Honduran coffee in major importing markets, Germany, Japan, and the U.S. was …

Go to article

Cinéma Sénégalais: Évolution Thématique Du Discours Filmique Dans Les Oeuvres De Sembene Ousmane, Djibril Diop Mambety, Moussa Sène Absa, Jo Gaye Ramaka Et Alain Gomis, Moussa Sow Jan 2004

Cinéma Sénégalais: Évolution Thématique Du Discours Filmique Dans Les Oeuvres De Sembene Ousmane, Djibril Diop Mambety, Moussa Sène Absa, Jo Gaye Ramaka Et Alain Gomis, Moussa Sow

LSU Doctoral Dissertations

This work aims at filling a gap in African cinema studies. The plurality in film production has been neglected or overseen by Africanist critiques as well as most of the filmmakers from the continent. Such continental shield of a monolithic Africa has been carried by European anthropologists and fostered in part by the Negritude movement in the late 1930s, still conveyed by mimetic writing. We begin by assessing such a uniform vision and explaining the ways in which it resisted time after more than 40 years of cinema in Africa. Then we introduce the notion of national cinema by exploring …

Go to article

Herbivore Movement And Spatial Population Dynamics In A Heterogeneous Landscape, Kyle Jonathan Haynes Jan 2004

Herbivore Movement And Spatial Population Dynamics In A Heterogeneous Landscape, Kyle Jonathan Haynes

LSU Doctoral Dissertations

To date, few metapopulation studies have isolated the effects of the intervening matrix from other attributes of landscape structure (e.g., patch geography or quality) that might influence dispersal among patches. Furthermore, there has been little exploration of the mechanisms underlying effects of the matrix on the spatial ecology of species. In this dissertation, I examine how the movement and distribution of the planthopper Prokelisia crocea within and among host-plant patches (prairie cordgrass, Spartina pectinata) is affected by the composition of the matrix (the invasive grass smooth brome [Bromus inermis], native non-host grasses, or mudflat). First, using a mark-recapture study in …

Go to article

Psychological And Neuropsychological Correlates Of Postconcussional Disorder, Joy Helena Wymer Jan 2004

Psychological And Neuropsychological Correlates Of Postconcussional Disorder, Joy Helena Wymer

LSU Doctoral Dissertations

Chronic symptoms of Postconcussional Disorder (PCD) occur in a significant minority of mild brain injury patients. The latest research suggests an interactionistic perspective as the most logical and empirically supported pathogenesis for the development and maintenance of PCD. The interactionistic perspective implicates organic factors in the development of acute symptoms of PCD, and psychological factors in the maintenance of chronic symptoms. Possible psychological factors relevant in the maintenance of PCD symptoms include a grief response, a coping hypothesis, and the development of dysfunctional coping loops. Providing support for a psychological etiology of symptom maintenance is research indicating reduction of chronic …

Go to article

Design And Fabrication Of Electromagnetic Micro-Relays Using The Uv-Liga Technique, John Dalton Williams Jan 2004

Design And Fabrication Of Electromagnetic Micro-Relays Using The Uv-Liga Technique, John Dalton Williams

LSU Doctoral Dissertations

This dissertation reports a research effort to microfabricate an electromagnetic relay for power applications using a multilayer UV-LIGA process. A mechanically wrapped coil was used and very simple design for the magnetic circuit was adopted to increase the design flexibility and performances. The broad material selection and the capability of making high aspect ratio microstructures of the UV-LIGA make the technology best suited for fabricating microelectromechanical power relays. Fabrication of the device required significant advances in the optical lithography of SU-8 negative photoresist. Research proved that aspect-ratios up to 40:1 in isolated open field structures of thickness between 1 and …

Go to article

The Effectiveness Of Videotape Feedback In Sport: Examining Cognitions In A Self-Controlled Learning Environment, Justin Menickelli Jan 2004

The Effectiveness Of Videotape Feedback In Sport: Examining Cognitions In A Self-Controlled Learning Environment, Justin Menickelli

LSU Doctoral Dissertations

Providing videotape feedback (VTFB) as a form of knowledge of performance (KP) to learners is a common instructional tool in teaching and coaching. VTFB has attracted renewed attention and various “laundry lists” of recommendations (e.g., provide VTFB immediately following performance, use frequently, vary camera angles) on VTFB implementation (e.g., Franks & Maile, 1991; Trinity & Annesi, 1996). Furthermore, researchers have begun exploring the cognitive variables which serve to mediate the impact of VTFB (e.g., Hebert, Landin, & Menickelli, 1998; Menickelli, Landin, Grisham, & Hebert, 2000). Recent research has focused on two key issues: VTFB provided in a self-controlled learning environment …

Go to article

Biology And Host Finding Of Predaceous Hister Beetles (Coleoptera: Histeridae) Associated With Ips Spp. (Coleoptera: Scolytidae) In Loblolly Pine (Pinus Taeda L.), William Pinson Shepherd Jan 2004

Biology And Host Finding Of Predaceous Hister Beetles (Coleoptera: Histeridae) Associated With Ips Spp. (Coleoptera: Scolytidae) In Loblolly Pine (Pinus Taeda L.), William Pinson Shepherd

LSU Doctoral Dissertations

The most common predaceous Histeridae (Coleoptera) found associated with Ips engraver beetles (Coleoptera: Scolytidae) in Louisiana were Platysoma attenuata LeConte, Pla. cylindrica (Paykull), Pla. parallelum (Say), and Plegaderus transversus (Say). Seasonal abundance of histerids in flight traps coincided with Ips spp. activity in the area. Histerid adults arrived at loblolly pine (Pinus taeda L.) logs one wk after Ips attacks had begun. As a group, histerids exhibited a bimodal emergence pattern with the first peak occurring during Ips emergence and a second four wks later, indicating that they fed on bark beetles and associated organisms arriving later in the colonization …

Go to article

First Prev Next Last