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Impact Of Foliar Fungicides On Yield And Net Returns In Soybeans, Benjamin L. Spinks
Impact Of Foliar Fungicides On Yield And Net Returns In Soybeans, Benjamin L. Spinks
Theses and Dissertations
Field studies were conducted in 2003, 2004, and 2005 in the Mississippi delta at 12 locations across common production practices to evaluate the impact of 12 single applications of fungicides at the R3 and R5 growth stage on soybean yield, seed quality, and net returns. Averaged across locations, azoxystrobin alone and mixed with other fungicides increased yields 161 to 343 kg/ha compared to the nontreated control. Fungicide applications made at R3-R4 were more efficacious and resulted in larger yield increases than applications made at R5-R6. Plots treated at the R3-R4 growth stage with 0.11kg ai/ha azoxystrobin alone or in combination …
Clustering Multiple Contextually Related Heterogeneous Datasets, Mahmood Hossain
Clustering Multiple Contextually Related Heterogeneous Datasets, Mahmood Hossain
Theses and Dissertations
Traditional clustering is typically based on a single feature set. In some domains, several feature sets may be available to represent the same objects, but it may not be easy to compute a useful and effective integrated feature set. We hypothesize that clustering individual datasets and then combining them using a suitable ensemble algorithm will yield better quality clusters compared to the individual clustering or clustering based on an integrated feature set. We present two classes of algorithms to address the problem of combining the results of clustering obtained from multiple related datasets where the datasets represent identical or overlapping …
Effects Of Vasoactive Agents On The Mechanical Properties Of Aortic Heart Valve Leaflets, Rebecca Lynn Pounders Mathis
Effects Of Vasoactive Agents On The Mechanical Properties Of Aortic Heart Valve Leaflets, Rebecca Lynn Pounders Mathis
Theses and Dissertations
Heart valve disease is currently one of the leading forms of heart disease. Current literature has shown that endothelin I, angiotension II and 5-HT are vasoactive agents which cause concentration dependent contractions in aortic valve leaflet tissue. This study tested the mechanical properties of leaflets cut in the radial direction after they were exposed to the agents at varied concentrations or for 0.5, 6 or 24 hours. The elastic modulus, ultimate tensile strength and the yield strength were calculated. In the time trials the elastic modulus and the ultimate tensile strength both showed a significant increase at 24-hours. However, there …
Functional Role Of Recombinant Cysteine Protease On Spodoptera Frugiperda Peritrophic Matrix, Srinidi Mohan
Functional Role Of Recombinant Cysteine Protease On Spodoptera Frugiperda Peritrophic Matrix, Srinidi Mohan
Theses and Dissertations
Fall armyworm larvae (FAW), which are serious pests in the southern United States, show retarded growth when they feed on insect-resistant maize inbreds Mp704 and Mp708. These maize genotypes are not only resistant to FAW, but to a number of other lepidopteran pests. In these genotypes, a unique, extracellular, 33-KDa cysteine protease (Mir1-CP) rapidly accumulates in the whorl in response to insect feeding. Initial morphological studies on larvae feeding on resistant maize plants over-expressing the cysteine protease showed severe damage in insect?s first line of defense, the peritrophic matrix (PM). But it is not known whether the cysteine protease has …
Selecting Keyword Search Terms In Computer Forensics Examinations Using Domain Analysis And Modeling, Alfred Christopher Bogen
Selecting Keyword Search Terms In Computer Forensics Examinations Using Domain Analysis And Modeling, Alfred Christopher Bogen
Theses and Dissertations
The motivation for computer forensics research includes the increase in crimes that involve the use of computers, the increasing capacity of digital storage media, a shortage of trained computer forensics technicians, and a lack of computer forensics standard practices. The hypothesis of this dissertation is that domain modeling of the computer forensics case environment can serve as a methodology for selecting keyword search terms and planning forensics examinations. This methodology can increase the quality of forensics examinations without significantly increasing the combined effort of planning and executing keyword searches. The contributions of this dissertation include: ? A computer forensics examination …
Reduction Of Volatile Organic Compounds Emitted During Kiln Drying Of Southern Yellow Pine Lumber, Joseph Martin Dahlen
Reduction Of Volatile Organic Compounds Emitted During Kiln Drying Of Southern Yellow Pine Lumber, Joseph Martin Dahlen
Theses and Dissertations
The objective of the research is to reduce the volatile organic compounds (VOCs) emitted during kiln drying of southern yellow pine (SYP) lumber. Three treatment methods were explored to determine their effect on VOC emissions. The three methods were configured at the air exhaust of a pilot-scale dry kiln. 1) A steel reactor containing copper tubing heated to 100°, 200°, and 240° Celsius was evaluated. Temperature did not statistically affect VOC emissions (p-value = 0.1674). The average reduction of VOCs at 240° C was seven percent. 2) The use of hydrogen peroxide and ultra-violet (UV) light did not reduce VOCs …
Influence Of Food-Grade Ingredients On Offlavor Compounds In Catfish Fillets, Sovann Kin
Influence Of Food-Grade Ingredients On Offlavor Compounds In Catfish Fillets, Sovann Kin
Theses and Dissertations
The purpose of this study was to screen the effect of some food-grade ingredients on the off-odors caused by geosmin and 2-methylisoborneol (MIB) compounds in catfish fillets by sensory evaluation. The study revealed that geosmin and MIB odor intensity were reduced to different degrees when fillets were dipped in lime flavor (94% and 67%, respectively), 0.5% acetic acid (AA) (70% and 16%, respectively), hardwood liquid smoke (98% and 86%, respectively), or hickory liquid smoke (98% and 100% respectively) in cooked products. A 0.5% AA proved to be effective in decreasing odor intensity of geosmin (70%) in cooked products, whereas lime …
Attitudes And Perceptions Of Mississippi Career And Technology School Administrators Toward Technology Integration And Their Knowledge And Use Of The National Educational Technology Standards For School Administators (Nets-A), Janice Holman Sears
Theses and Dissertations
The purpose of this study was to examine Mississippi?s Career and Technology School Administrators? attitudes and perceptions toward technology integration and to determine their knowledge and use of the NETS∙A. The study contributed to the literature on technology integration and the NETS∙A in the secondary classroom. The research design for this study was descriptive and correlational. A pilot study was conducted prior to the commencement of the research study in which no problems were identified. Out of a population of 144 Mississippi Career and Technology School Administrators, 102 participated in the study. A survey instrument consisting of three parts was …
Innovative Scintillating Optical Fibers For Detecting/Monitoring Gamma Radiation, Ashwini Jayaprakash
Innovative Scintillating Optical Fibers For Detecting/Monitoring Gamma Radiation, Ashwini Jayaprakash
Theses and Dissertations
A scintillating optical fiber sensor of this work consists of a scintillating optical fiber, connected to a photomultiplier tube (PMT) via a conventional silica optical fiber. When a gamma ray impinges on the scintillating optical fiber, photons are generated inside the fiber. The photons are trapped inside the fiber and guided through the PMT. The PMT output signal is acquired by a computer. Two types of scintillating optical fibers sensors were developed for gamma ray detection. The first one is a silica optical fiber doped with an inorganic scintillating agent. The second one is a liquid core waveguide optical fiber …
Development Of Power Flow With Distributed Generators And Reconfiguration For Restoration Of Unbalanced Distribution Systems, Sarika Khushalani
Development Of Power Flow With Distributed Generators And Reconfiguration For Restoration Of Unbalanced Distribution Systems, Sarika Khushalani
Theses and Dissertations
With the increasing interest in distribution automation, distribution power flow is important for applications like VAR planning, switching, state estimation and especially optimization. Typically, a distribution system originates at a substation and continues to a lower voltage for delivery to the customers. There are several tools for transmission system analysis. These tools include Newton Raphson, Gauss Seidel and fast decoupled techniques. These techniques however sometimes fail to converge when applied to distribution systems due to their higher resistance/reactance (R/X) ratio of the lines, making them ill conditioned. Distribution systems typically have a radial topological structure where the loads are not …
Multi-Agent Based Control And Reconfiguration For Restoration Of Distribution Systems With Distributed Generators, Jignesh M. Solanki
Multi-Agent Based Control And Reconfiguration For Restoration Of Distribution Systems With Distributed Generators, Jignesh M. Solanki
Theses and Dissertations
Restoration entails the development of a plan consisting of opening or closing of switches, which is called reconfiguration. This dissertation proposes the design of a fast and efficient service restoration with a load shedding method for land-based and ship systems, considering priority of customers and several other system operating constraints. Existing methods, based on centralized restoration schemes that require a powerful central computer, may lead to a single point of failure. This research uses a decentralized scheme based on agents. A group of agents created to realize a specific goal by their interactions is called a Multi-Agent System (MAS). Agents …
An Empirical Study Of Organizational Ubiquitous Computing Technology Adoption: The Case Of Radio Frequency Identification (Rfid) In The Healthcare Industry, Cheon-Pyo Lee
Theses and Dissertations
Advances in wireless networking and the Internet move us toward ubiquitous and embedded computing. Ubiquitous and embedded computing enhances computer use by making computers available throughout the physical environment while making them effectively invisible to the user. In the ubiquitous and embedded computing era, computers in the traditional sense gradually fade, and information mediated by computers is available anywhere and anytime through devices that are embedded in the environment. Radio Frequency Identification (RFID) is one of the key technologies of the ubiquitous and embedded computing era. RFID is a technology used to identify, track, and trace a person or object …
Study Of Lunar Constellations For Situational Awareness And Surveillance, Devon Sanders
Study Of Lunar Constellations For Situational Awareness And Surveillance, Devon Sanders
Theses and Dissertations
Lunar constellations providing the capabilities of situational awareness and surveillance for future mission operators are analyzed in this study. The use of specialty orbits, such as sun-synchronous and frozen orbits, are analyzed to determine the applicability of these unique orbits. Additionally, altitude and inclination trades are performed to determine the degree to which mission objectives are achieved through ranges of these orbital parameters. Using the analyzed orbits, constellations of varying patterns are developed and surface coverage figures of merit are used to evaluate them. The research concludes with calculation of the yearly cross-track and in-track stationkeeping costs of a representative …
Hybrid Electric Vehicle Modeling In Generic Modeling Environment, Shravana Kumar Musunuri
Hybrid Electric Vehicle Modeling In Generic Modeling Environment, Shravana Kumar Musunuri
Theses and Dissertations
The Hybrid Electric Vehicle (HEV) is a complex electromechanical system with complex interactions among various components. Due to the large number of design variables involved, the design flexibility in the HEV makes performance studies difficult. As the system complexity and sophistication increases, it becomes much more difficult to predict these interactions and design the system accordingly. Also, different variations in the design and manufacture of various components and systems involve a large amount of work and cost to keep updated of all these variations. While the above issues ask for a flexible design environment suitable for vehicle design, most of …
A Social Exchange Perspective Of Intention To Quit, Shawn Michael Keough
A Social Exchange Perspective Of Intention To Quit, Shawn Michael Keough
Theses and Dissertations
This dissertation introduces a social exchange perspective of intention to quit and examines the relationship of several work-related and non work-related variables with intention to quit. Specifically, the relationships between the following ? perceived organizational support (POS), perceived supervisor support (POS), family responsibility, kinship responsibility ? and intention to quit were examined. POS and PSS were examined to provide a better understanding of the role each plays in the development of intention to quit. Family responsibility and kinship responsibility were examined because prior research has generally ignored the role each may play in the development of intention to quit. A …
Instructional Choices Of Mississippi Foreign Language Teachers, Elizabeth Anne Harrison
Instructional Choices Of Mississippi Foreign Language Teachers, Elizabeth Anne Harrison
Theses and Dissertations
The purpose of this study was to survey Mississippi foreign language teachers in regards to demographic information pertaining to their educational and professional experiences and how often they employ certain activities taken from the Mississippi Foreign Language Curriculum Framework (2000). The data were then examined to see if a relationship existed between specific teacher demographic data and how they implemented the state-mandated curriculum. A researcher-designed survey instrument was developed. In order to establish the validity and reliability of the instrument two samples were taken: Mississippi foreign language teachers and teachers subscribing to the on-line listserv FLTEACH. A total sample of …
Micro-Chp Modeling And Simulation Using Thermodynamic Cycles, Alan Mark Moran
Micro-Chp Modeling And Simulation Using Thermodynamic Cycles, Alan Mark Moran
Theses and Dissertations
This thesis discusses the thermoeconomic modeling and simulation of micro-CHP systems powered by various prime movers. Micro Cooling, Heating, and Power (micro-CHP) is becoming an increasingly important energy option as the demand for electrical power as well as heating and cooling for buildings increases worldwide. Micro-CHP has the potential to increase the total energy efficiency for cooling, heating, and powering residences, offices, and other relatively small buildings by using waste thermal energy from electricity production to deliver heating and cooling. Calculation methodologies are presented for the different components of micro CHP systems using thermodynamic cycles and mass and energy balances. …
Grout Impregnation Of Pre-Placed Recycled Concrete Pavement (Rcp) For Rapid Repair Of Deteriorated Portland Cement Concrete Airfield Pavements, Travis A. Mann
Grout Impregnation Of Pre-Placed Recycled Concrete Pavement (Rcp) For Rapid Repair Of Deteriorated Portland Cement Concrete Airfield Pavements, Travis A. Mann
Theses and Dissertations
The U.S. military must have the ability to rapidly deploy troops and equipment anywhere in the world as part of a contingency operation. Recent military operations have highlighted the critical need for rapid repair procedures and materials for military use on sub-standard, in-theater airfields. The U.S. Army Corps of Engineers, Engineer Research and Development Center is currently addressing these problems through a program titled ?Joint Rapid Airfield Construction?. This study involves the development of a method using rapid setting grouts and recycled concrete pavement (RCP) to repair portland cement concrete (PCC) pavements. A laboratory study was conducted to evaluate material …
Effective Modeling Of Agricultural Practices Within Large-Scale Hydrologic And Water Quality Simulations, Zhijun Liu
Effective Modeling Of Agricultural Practices Within Large-Scale Hydrologic And Water Quality Simulations, Zhijun Liu
Theses and Dissertations
The previously developed watershed hydrological and water quality model for St. Louis Bay watershed by Kieffer (2002) was refined and calibrated. The aspects of model development refinement included development of fertilization-related nutrient input parameters, evaluation of nutrient input methods, development of plant uptake-related nutrient input parameters, non-cropland simulation using PQUAL module, and recalibration of hydrology in Jourdan River. The related information of typical cropland management practice based on consultation from Mississippi State University Extention Service personnel was integrated into the watershed model. In addition, the Mississippi Department of Environmental Quality (MDEQ) observed water quality data were analyzed to evaluate the …
Development Of A Health Management Information System For The Mountain Gorilla (Gorilla Beringei), Richard Brian Minnis
Development Of A Health Management Information System For The Mountain Gorilla (Gorilla Beringei), Richard Brian Minnis
Theses and Dissertations
The Mountain Gorillas of Central Africa are one of the most highly endangered species in the world, with only 740 individuals surviving. One of the greatest threats to this species is disease. Health of wildlife is continually garnering more attention in the public arena due to recent outbreaks of diseases such as West Nile and High Pathogenic Avian Influenza. However, no system currently exists to facilitate the management and analysis of wildlife health data. The research conducted herein was the development and testing of a health information monitoring system for the mountain gorillas entitled Internet-supported Management Program to Assist Conservation …
Sds-Page And Western Blotting Analyses Of Internalin A In Listeria Monocytogenes And Listeria Spp, Bang-Yuan Chen
Sds-Page And Western Blotting Analyses Of Internalin A In Listeria Monocytogenes And Listeria Spp, Bang-Yuan Chen
Theses and Dissertations
Attachment strength of Listeria spp. and their InlA expression was assessed. Listeria monocytogenes 19111 exhibited the strongest attachment strength with L. monocytogenes 19115, L. grayi, L. innocua, and L. monocytogenes 7644 being the weakest. InlA expression was not detected in silver stained SDS gels but was detected in Western blotting images. Internalin A was only detected in protein extracts of L. monocytogenes 19111 and 7644 with band intensities of 50.1 and 2.5 pixels, respectively. Greater InlA expression was correlated with higher attachment strength in L. monocytogenes 19111. Listeria monocytogenes 19115 did not express InlA but it had a stronger attachment …
Semantics-Enabled Framework For Knowledge Discovery From Earth Observation Data, Surya Srinivas Durbha
Semantics-Enabled Framework For Knowledge Discovery From Earth Observation Data, Surya Srinivas Durbha
Theses and Dissertations
Earth observation data has increased significantly over the last decades with satellites collecting and transmitting to Earth receiving stations in excess of three terabytes of data a day. This data acquisition rate is a major challenge to the existing data exploitation and dissemination approaches. The lack of content and semantics based interactive information searching and retrieval capabilities from the image archives is an impediment to the use of the data. The proposed framework (Intelligent Interactive Image Knowledge retrieval-I3KR) is built around a concept-based model using domain dependant ontologies. An unsupervised segmentation algorithm is employed to extract homogeneous regions and calculate …
Molecular-Genetic And Structural Analyses Of The Nifhdkx Proteins Of The Nitrogenase System, Surobhi Lahiri
Molecular-Genetic And Structural Analyses Of The Nifhdkx Proteins Of The Nitrogenase System, Surobhi Lahiri
Theses and Dissertations
The nitrogenase enzyme is the biochemical machiner responsible for the conversion of the largely unavailable nitrogen to the easily assimilable ammonia for living organisms by the process termed as biological nitrogen fixation (BNF). This study was focused on understanding the various structural and functional aspects of the nitrogenase enzyme related to maturation and assembly of the FeMo-cofactor (FeMoco) metallocluster of the MoFe protein (the site for final substrate reduction), development of a dimeric MoFe protein and the structural homology of nitrogenase with other metalloenzymes. This research was specifically directed towards the NifHDKX proteins in which the nifHDK genes are the …
Monte-Carlo Simulation Of Photoproduction Of Omega Meson, Parikshit Manoj Junnarkar
Monte-Carlo Simulation Of Photoproduction Of Omega Meson, Parikshit Manoj Junnarkar
Theses and Dissertations
The null result of December 2004 Sub-threshold photoproduction of J/$psi$ experiment has motivated this thesis. This monte-carlo predicts the cross-section for sub-threshold photoproduction process and provides an insight on the cross-section range of these processess. The experiment was also conducted as a calibration run for Omega and Eta mesons for the verification of correctness of experimental procedure. The results from this experiment are compared with the monte-carlo simulation for the number of omega meson events. This is primarily done as the models for photoproduction of omega meson are well tested. The monte-carlo provides satisfactory results for the photoproduction models and …
Multiscale Structure-Function Relations Of A Tendon, Lakiesha Nicole Williams
Multiscale Structure-Function Relations Of A Tendon, Lakiesha Nicole Williams
Theses and Dissertations
In 1998, the United States National Committee on Biomechanics (USNCB) established an evolving discipline called Functional Tissue Engineering (FTE). In establishing this discipline, the goals of the USNCB were to advance FTE by increasing awareness among tissue engineers about the importance of restoring function when engineering tissue constructs. Another goal was to encourage tissue engineers to incorporate these functional criteria in the design, manufacturing and optimization of tissue engineered constructs. Based on this motivation, an investigation of the structure and mechanical properties of the rabbit patellar tendon will be executed, with the ultimate goal of creating a multiscale soft tissue …
Bacterial Source Tracking Of A Watershed Impacted By Cattle Pastures, Celina Phelps
Bacterial Source Tracking Of A Watershed Impacted By Cattle Pastures, Celina Phelps
Theses and Dissertations
Pathogenic microorganisms introduced by cattle may be transported to distant locations via watershed runoff. Escherichia coli, Enterococcus spp., and Streptococcus spp. are a few species present in runoff from land impacted by humans, cattle, and wildlife. Initial data reveals that E. coli concentrations in water are greater in areas impacted by cattle than by humans. And, wildlife contributes greater concentration fluctuations than either humans or cattle. When cattle are removed from a pasture, the bacterial concentrations rapidly decrease; however, slight variations in cattle herd size do not appear to significantly influence these counts. Amplified fragment length polymorphisms (AFLP) and repeated-sequence …
Angiotensin Ii Mediated Regulation Of Signal Transduction In Metabolic Syndrome And Cancer, Ravindra Bharatrao Kolhe
Angiotensin Ii Mediated Regulation Of Signal Transduction In Metabolic Syndrome And Cancer, Ravindra Bharatrao Kolhe
Theses and Dissertations
Patients suffering from hypertension often develop non-Insulin dependent diabetes mellitus (NIDDM), a condition caused by Insulin resistance. Though these patients have normal Insulin receptor (IR) and high levels of Insulin in blood, they fail to have IR-mediated signaling essential for glucose uptake and availability. NIDDM usually begins as insulin resistance, a condition in which Insulin Receptor (IR)-mediated signaling that leads to glucose uptake and glucose availability to cells is inhibited even in the presence of high levels of Insulin in blood. Mechanisms for the development of this Insulin resistance in patients suffering from hypertension are unclear. Angiotensin II (Ang II) …
Endohedral And Exohedral Complexes Of Polyhedral Oligomeric Silsesquioxanes (Poss): Endohedral Clusters Of Si12 : A Theoretical Study, Delwar Hossain
Endohedral And Exohedral Complexes Of Polyhedral Oligomeric Silsesquioxanes (Poss): Endohedral Clusters Of Si12 : A Theoretical Study, Delwar Hossain
Theses and Dissertations
Two distinct research projects were carried out in this dissertation. In the first project the results of first principle calculations on endo- and exohedral complexes of polyhedral oligomeric silsesqiuoxanes (POSS) with atomic and ionic species were carried out. Detailed studies were performed on structures, stabilities and electronic properties of these complexes. The stabilities of the endohedral Tn-POSS ( n = 8, 10 and 12) complexes depends on both the cage size and the nature of the endohedral species. Alkali metal ion encapsulation leads to cage contraction. Electron density was transferred from the cage to the alkali metal cations. Halide encapsulation …
Evaluation Of The Effects Of A Curriculum-Based Math Intervention Package With Elementary School-Age Students In A Summer Academic Clinic, Nicholas E. Hoda
Evaluation Of The Effects Of A Curriculum-Based Math Intervention Package With Elementary School-Age Students In A Summer Academic Clinic, Nicholas E. Hoda
Theses and Dissertations
The purpose of this study was to empirically evaluate the effects of the Math to Mastery intervention package versus the effects of immediate corrective feedback with elementary school students who were performing at least one year below grade level in mathematics. Students were participants in a one-month summer academic clinic for remediation of reading, writing, and mathematics deficits held at a university in the southeastern United States. A combined-series multiple baseline design across participants was used to evaluate the effects of both interventions for gains in fluency as measured by digits correct per minute on one minute curriculum-based measurement probes. …
Field Emergence Of Horseweed [Conyza Canadensis (L.) Cronq.] And Control Utilizing Tillage And Herbicides, Thomas William Eubank
Field Emergence Of Horseweed [Conyza Canadensis (L.) Cronq.] And Control Utilizing Tillage And Herbicides, Thomas William Eubank
Theses and Dissertations
Horseweed has been documented in 70 countries and 40 different crops around the world and is listed as being a problem weed in no-till production systems. Horseweed has developed resistance to many herbicide modes of action including glycine. Field experiments were conducted from 2004 to 2006 in the Mississippi Delta to evaluate the field emergence of horseweed and most effective treatment programs for its control. Field emergence of horseweed was observed occurring primarily in the fall of the year, September through early November, when temperatures were between 15.6 to 23.4 C with later flushes occurring from late January through early …