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Pathogen Entrance And Development Of Disease During Infection Of The American Channel Catfish Ictalurus Punctatus By The Enterobacterium Edwardsiella Ictaluri, Simon Menanteau-Ledouble
Pathogen Entrance And Development Of Disease During Infection Of The American Channel Catfish Ictalurus Punctatus By The Enterobacterium Edwardsiella Ictaluri, Simon Menanteau-Ledouble
Theses and Dissertations
Since being first reported in the late 1980ies, the Enterobacterium Edwardsiella ictaluri has rose in prevalence to become one of the two most damaging pathogens affecting the channel catfish industry. Despite this significance of the pathogen, understanding of the development of the disease, especially its route of entry into the host and the earlier stages of the infection, is still incomplete. A series of challenges were conducted using bioluminescent E. ictaluri either by infecting fish through immersion or topical application of the bacteria directly on the intact or abraded epithelium. This showed that abraded fish developed septicemia and died faster …
The Importance Of Soft Skills In The Workplace As Perceived By Community College Instructors And Industries, Laura Suzanne Tribble
The Importance Of Soft Skills In The Workplace As Perceived By Community College Instructors And Industries, Laura Suzanne Tribble
Theses and Dissertations
Soft skills include communication skills, problem-solving skills, conflict resolution, working well with other people, and ensuring customer satisfaction. Employers need employees who have adequate technical skills but who also have soft skills. There is limited information about the perceptions of which soft skills are needed in the workplace. This study attempted to close the gap in the literature concerning the perceptions of instructors and employers in the area of soft skills in the workplace. For this study, the Soft Skills Survey for Instructors and Employers was used to gather the perceptions of information technology instructors and employers in five community …
Current Sharing To Minimize Power Losses In Parallel Converters Using Pso, Dan Li
Current Sharing To Minimize Power Losses In Parallel Converters Using Pso, Dan Li
Theses and Dissertations
The Power Electronic Building Block (PEBB) concept leads to multifunctional converter systems, which provide robustness and flexibility in heavily power electronics based power systems. Systems comprised of flexible modular converters may have multiple possible operation conditions with respect to individual converters that meet the overall system goals. In this thesis, an optimization method for such flexible online power electronic systems is developed to minimize power losses of the overall group of converters in the system. Here the objective is to allocate sharing such that compensation objectives are met while the power loss of the entire parallel group of compensators is …
Mobile Computing And Sensor Web Services For Coastal Buoys, Santhosh Kumar Amanchi Rajender
Mobile Computing And Sensor Web Services For Coastal Buoys, Santhosh Kumar Amanchi Rajender
Theses and Dissertations
Mobile device technology with the influence of the Internet is creating a lot of Webbased services so that people can have easy and 24-hour access to the services. Recently, the Google’s Android has revolutionized applications development for the mobile platform. As there is an increasing number of companies exposing their services as Web services, enabling flexible mobile access to distributed Web resources is a relevant challenge. However, the current Web is a collection of human readable pages that are unintelligible to computer programs. Semantic Web and Web services have the potential of overcoming this limitation. For this, a standard ontology …
Movements, Relatedness And Modeled Genetic Manipulation Of White-Tailed Deer, Stephen Lance Webb
Movements, Relatedness And Modeled Genetic Manipulation Of White-Tailed Deer, Stephen Lance Webb
Theses and Dissertations
White-tailed deer (Odocoileus virginianus) have been intensively studied across their range. However, many aspects of the white-tailed deer’s ecology have not been studied or are difficult to study. The advent of global positioning system (GPS) collar technology and molecular genetics techniques now allows researchers to collect fine-scale and cryptic phenomena. In addition, selective harvest of male white-tailed deer, based on antler size, has not been critically evaluated. Thus, development and use of quantitative genetics models will be useful for elucidating the effects of selective harvest on mean population antler size. I used GPS collar technology to further understand white-tailed deer …
Obstacle Array Drag Coefficient Parametric Response Surface Analysis, Mouthgalya Ganapathy
Obstacle Array Drag Coefficient Parametric Response Surface Analysis, Mouthgalya Ganapathy
Theses and Dissertations
Throughout literature, one finds where numerous methodologies and models have been developed to predict the effect of surface roughness on a flat surface. Many of the models utilize a drag coefficient as one of the necessary parameters. In urban settings with groups of buildings, the drag coefficient on an individual obstacle would be determined by parameters like wind direction and the relative positioning of a building, in addition to Reynolds number and shape. Computational experiments were performed to simulate the fluid flow around a single row and two rows of “cube” obstacles. Based on dimensional analysis, the drag coefficient was …
Optimal Control Of Voltage And Power In Mvdc Multi-Zonal Shipboard Power System, Padmavathy Kankanala
Optimal Control Of Voltage And Power In Mvdc Multi-Zonal Shipboard Power System, Padmavathy Kankanala
Theses and Dissertations
Recent advancements in Voltage Source Converters (VSCs) of high-voltage and high-power rating had a significant impact on the development of Multi-Terminal HVDC (MTDC) power transmission systems. The U.S. Navy has proposed Multi-Zonal Medium Voltage DC (MVDC) Shipboard Power System (SPS) architecture for the next generation of their surface combatant. A Multi-Zonal MVDC SPS consists of several VSCs exchanging power through a DC network. Following a system fault or damage, the current flow pattern in the DC distribution grid will change and the DC voltages across the VSCs will assume new values. DC voltage reference or power reference settings of VSCs …
Parallel Viterbi Search For Continuous Speech Recognition On A Multi-Core Architecture, Naveen Parihar
Parallel Viterbi Search For Continuous Speech Recognition On A Multi-Core Architecture, Naveen Parihar
Theses and Dissertations
State-of-the-art speech-recognition systems can successfully perform simple tasks in real-time on most computers, when the tasks are performed in controlled and noiseree environments. However, current algorithms and processors are not yet powerful enough for real-time large-vocabulary conversational speech recognition in noisy, real-world environments. Parallel processing can improve the real-time performance of speech recognition systems and increase their applicability, and developing an effective approach to parallelization is especially important given the recent trend toward multi-core processor design. In this dissertation, we introduce methods for parallelizing a single-pass across-word n-gram lexical-tree based Viterbi recognizer, which is the most popular architecture for Viterbi-based …
Flathead Catfish Stock Characteristics In The Pascagoula River Following Hurricane Katrina, Russell M. Barabe
Flathead Catfish Stock Characteristics In The Pascagoula River Following Hurricane Katrina, Russell M. Barabe
Theses and Dissertations
Flathead catfish stocks in the Pascagoula River were decimated by the passage of Hurricane Katrina. Age-0 fish survived the storm, producing a strong 2005 year-class. Reproduction by the remaining adults and/or downstream movement from tributaries produced an additional strong cohort in 2006. The strong 2005 year-class resulted in the capture of a high proportion of two-year-old fish in 2007. In 2008, a high proportion of two- and three-year-old fish were captured, illustrating the high rate of survival of the 2005 year-class, and the presence of a strong 2006 year-class. The flathead catfish population of the Pascagoula River was dominated by …
Fusion Of Spectral Reflectance And Derivative Information For Robust Hyperspectral Land Cover Classification, Hemanth Reddy Kalluri
Fusion Of Spectral Reflectance And Derivative Information For Robust Hyperspectral Land Cover Classification, Hemanth Reddy Kalluri
Theses and Dissertations
Developments in sensor technology have made high resolution hyperspectral remote sensing data available to the remote sensing analyst for ground cover classification and target recognition tasks. Further, with limited ground-truth data in many real-life operating scenarios, such hyperspectral classification systems often employ dimensionality reduction algorithms. In this thesis, the efficacy of spectral derivative features for hyperspectral analysis is studied. These studies are conducted within the context of both single and multiple classifier systems. Finally, a modification of existing classification techniques is proposed and tested on spectral reflectance and derivative features that adapts the classification systems to the characteristics of the …
Changes In Chinese Policy Toward North Korean Refugees Over The Last Two Decades, Shinhea Eom
Changes In Chinese Policy Toward North Korean Refugees Over The Last Two Decades, Shinhea Eom
Theses and Dissertations
China does not view North Koreans who are staying in its territory as refugees and routinely deports them to North Korea. However, in the early 21st century, there have been some cases in which China has allowed North Koreans to leave China instead of sending them back to North Korea. This thesis examines how China’s North Korean refugee policy has changed over the last two decades and whether international factors have influenced this policy. The results suggest that in the 1990’s China gave priority to the repatriation agreement with North Korea. However, in the 2000’s from its own experience with …
A Descriptive Study Of Intercollegiate Athletics In Mississippi's Public Community And Junior Colleges, Brian Colson Alexander
A Descriptive Study Of Intercollegiate Athletics In Mississippi's Public Community And Junior Colleges, Brian Colson Alexander
Theses and Dissertations
The purpose of the study was to provide an assessment of the involvement of Mississippi's community and junior colleges in intercollegiate athletics during the academic year 2007–2008. These data could assist community and junior college presidents, vice presidents residing over athletics, athletic directors, and other policy makers in their decision-making processes concerning intercollegiate athletics. They could compare their institution with other institutions in the state. This study included the entire population of Mississippi's public community and junior colleges that offered intercollegiate athletics. Frequencies and percentages were utilized by the researcher to report the information. Data were collected to provide an …
Osteogenic Regulatory Mechanisms Activated By Pressure In Aortic Heart Valve, Carol Andrea Pregonero Gamez
Osteogenic Regulatory Mechanisms Activated By Pressure In Aortic Heart Valve, Carol Andrea Pregonero Gamez
Theses and Dissertations
Calcific aortic valve disease (CAVD) is the most common cause of aortic valve failure and replacement in the elderly population, affecting 25% of the population over 65 years of age. Current pharmacological approaches for preventing the onset and progression of calcific aortic valve disease have not shown consistent benefits in clinical studies. Differentiation of valvular interstitial cells (VICs) into osteoblast–like cells is an integral step in the calcification process. Although clinical evidence suggests hypertension as a potential candidate contributing to the development of CAVD, the underlying molecular mechanisms that cause de-differentiation remain unclear. The present study investigates the role of …
Faunal Communities Of Temporary Wetlands Of Upland And Floodplain Public Forested Lands In North Mississippi, Katherine E. Edwards
Faunal Communities Of Temporary Wetlands Of Upland And Floodplain Public Forested Lands In North Mississippi, Katherine E. Edwards
Theses and Dissertations
I conducted surveys of amphibian, reptile, and small mammal communities surrounding 4 isolated, upland and 6 stream-connected temporary wetlands on Tombigbee National Forest and Noxubee National Wildlife Refuge in north Mississippi from May 2001 - March 2006. Trap captures yielded 17 amphibian species (n = 11,142), 21 reptile species (n = 541), and 10 small mammal species (n = 472). Upland pools supported greater diversity of Ambystomatid salamanders, anurans, lizards, and mice (Peromyscus spp.), than floodplain pools. Factors including landscape position of pools, proximity to alternate water sources, and barriers to dispersal potentially influenced faunal communities of temporary wetlands. Infrared-triggered …
In Vitro Digestibilty Of Ryegrass Supplemented With Hay, Corn, Or Soybean Hulls, Chadwick Warren Dunaway
In Vitro Digestibilty Of Ryegrass Supplemented With Hay, Corn, Or Soybean Hulls, Chadwick Warren Dunaway
Theses and Dissertations
An in vitro continuous culture rumen fermentation experiment was conducted to evaluate digestibility of annual ryegrass either fed alone or annual ryegrass supplemented with hay, corn, or soybean hulls. Nutrient disappearance of feedstuffs offered were not different (P > 0.05) as a percentage of the diet however there were differences (P < 0.05) in amounts of individual nutrients digested for each treatment. Ammonia-N concentrations of culture samples were less (P < 0.05) for vessels fed corn as a supplement however there was no difference (P > 0.05) among vessels fed either ryegrass alone or supplemented with hay or soybean hulls. This may indicate a more efficient use of available nutrients from annual ryegrass when corn was supplemented.
An Analysis Of The Harvesting Costs And Productivity Of Logging Contractors Within The Eastern United States, Jeffrey Jaudon Smith
An Analysis Of The Harvesting Costs And Productivity Of Logging Contractors Within The Eastern United States, Jeffrey Jaudon Smith
Theses and Dissertations
A data set was compiled from detailed information provided from 26 independent logging contractors from throughout the Eastern United States over a five year period from 2000 to 2004. The age distribution of the logging contractors in the study has increased over time with the percentage of contactors over the age of 55 rising from 15% to 32%. The median age of all equipment including feller-bunchers, skidders, loaders, bulldozers, service vehicles, and haul trucks increased over the period. While the median age of all equipment increased, the age of service and support equipment saw the greatest increase. The total average …
The Role Of Cattle And Gulf Coast Ticks (Amblyomma Maculatum) In The Epidemiology Of Rickettsia Parkeri Infection, Kristine T. Edwards
The Role Of Cattle And Gulf Coast Ticks (Amblyomma Maculatum) In The Epidemiology Of Rickettsia Parkeri Infection, Kristine T. Edwards
Theses and Dissertations
I hypothesized cattle and Gulf Coast ticks (GCT), Amblyomma maculatum, may be involved in epidemiology of Rickettsia parkeri infection. I demonstrated transient rickettsemia by polymerase chain reaction (PCR) for the 17 kilodalton (kDa) gene in 33% (2/6) of calves experimentally exposed to R. parkeri either by direct inoculation or by placement of R. parkeri-infected GCT on calves’ ears. Calves (4/4) receiving GCT developed lesions at attachment sites consistent with a pathologic condition known as “gotch” ear whether or not GCT were infected with R. parkeri, suggesting the condition is related to GCT attachment and not to rickettsial infection. In calves …
Uncertainty In Measurements And Cognitive Engineering Analysis Of A Decision Support System For Power System Reconfiguration, Venkata Krishna Pendurthi
Uncertainty In Measurements And Cognitive Engineering Analysis Of A Decision Support System For Power System Reconfiguration, Venkata Krishna Pendurthi
Theses and Dissertations
Accuracy of the measurement data used for the decision making process or for shipboard operations and control is very important to ensure the reliability and survivability. The uncertainties present in measurement data need to be minimized for reliable system operation. In this work, a fuzzy logic based model is developed to deal with uncertainty in the meter data. Operational and historical parameters of the meters were used to determine a ‘trust’ value of individual meter. A fuzzy correction system for measurement data was used to generate an input dataset for a genetic algorithm based reconfiguration system. Additionally, with the goal …
Evaluation Of A Novel Endophyte-Infected Tall Fescue Cultivar As A Safe Forage For Pregnant Mares, Hussain Ali Al Rashed
Evaluation Of A Novel Endophyte-Infected Tall Fescue Cultivar As A Safe Forage For Pregnant Mares, Hussain Ali Al Rashed
Theses and Dissertations
Fescue toxicosis is a condition that afflicts livestock grazing endophyte-infected tall fescue and is particularly detrimental to pregnant mares. A two year evaluation study of a novel endophtye-infected cultivar, AGRFA-144 (A-144), did not induce fescue toxicosis in late-term pregnant mares. All mares delivered viable foals except in E+ group which had two viable foals, one stillborn-dystocia and one compromised foal which was euthanized at 72 h pp. Serum P4 concentrations were similar among A-144, NE+, and E- mares (p>0.05). Foal BW and foal/placental weight ratios were similar for A-144, NE+, and E- (p>0.05). Foal serum P4 was similar …
Evaluation Of Lighter Density Fraction From Dried Distillers Grains With Solubles As A Feedstuff For Ruminants, Jonathan Michael Greene
Evaluation Of Lighter Density Fraction From Dried Distillers Grains With Solubles As A Feedstuff For Ruminants, Jonathan Michael Greene
Theses and Dissertations
The objective of this study was to evaluate the lighter fraction of DDGS as a possible feedstuff for cattle. To accomplish this, a digestion trial was performed to determine nutrient digestibility and crude protein retention by steers consuming the lighter fraction of DDGS. Steers received L, a diet containing the lighter fraction of DDGS, D, a diet containing whole DDGS, or C, a control diet. Steers receiving L consumed less DM than steers receiving D and C. CP retention and digestibilities of DM, OM, ash, NDF, ADF, HC, and energy did not differ among steers in different treatment groups. Fat …
Flow Structure/Particle Interaction In The Small Bronchial Tubes, Belabahen Soni
Flow Structure/Particle Interaction In The Small Bronchial Tubes, Belabahen Soni
Theses and Dissertations
The laminar flow in the small bronchial tubes is quite complex due to the presence of vortex-dominated, secondary flows. Contributing to this complexity are the geometrical characteristics of the bronchial tubes that include asymmetric and nonplanar branching. These secondary flow fields play a crucial role in particle deposition; however, the actual mechanisms that determine the particle distributions are not fully understood. The research reported here increases understanding of this phenomenon by studying flow structure/ particle interaction in the small bronchial tubes for steady and unsteady respiratory conditions. Specifically, the effects of simultaneous nonplanar and asymmetric branching were investigated. The nonplanar …
Fractionation Of Soybean Meal, Cottonseed Meal And Wheat Middlings Using Combination Of Sieving And Air Classification, Ravi Kumar Challa
Fractionation Of Soybean Meal, Cottonseed Meal And Wheat Middlings Using Combination Of Sieving And Air Classification, Ravi Kumar Challa
Theses and Dissertations
Fiber separation from these animal feeds could increase the protein and hence increase the value of the animal feed. The objective of the study was to evaluate the combination of sieving and air classification for fiber separation from soybean meal (SBM), cottonseed meal (CSM) and wheat middlings (WM). The effect of yields of lighter fractions on fiber separation from size fractions was also investigated. At low yields of lighter fraction (5%), the quantity of fiber product separated was 3.7, 1.3 and 4.8% by weight of SBM, CSM and WM respectively. At high yields of lighter fractions (15%), the quantity of …
Gamma-Ray Bursts: New Parameters For Measuring Energy Dependent Spectral Lag Times, Phillip Jefferson Durst
Gamma-Ray Bursts: New Parameters For Measuring Energy Dependent Spectral Lag Times, Phillip Jefferson Durst
Theses and Dissertations
A new method for measuring the hardness-intensity correlation (HIC) present in gamma-ray bursts (GRB) is developed. This method is used to measure the HIC for 100 single-peak gamma-ray bursts, 17 with known redshifts. The HIC is thus shown to be a consequence of energy-dependent lag times between hard and soft photons. Parameters derived from time profile fits using a modified double sigmoidal function are used to calculate a new set of lag time parameters for bursts, and these parameters are analyzed statistically to look for correlations with intrinsic GRB properties. This analysis shows that GRB red shift is related to …
Optimization Of The Production Of The Lantibiotics Mutacin 1140 In Modified M9 Media, Neeti Dahal
Optimization Of The Production Of The Lantibiotics Mutacin 1140 In Modified M9 Media, Neeti Dahal
Theses and Dissertations
Mutacin 1140, a class 1 bacteriocin, is produced by Streptococcus mutans and belongs to the type A lantibiotic family. Experiments were done to optimize production of mutacin 1140 in minimal media enabling a more cost efficient downstream purification method. The development of a small volume fermentation method enabled a rapid screen of several variables in a standard shaking incubator. This method provided a fast approach for determining components that promote mutacin 1140 production in minimal media broth. Lactose was determined to be the optimal carbon source for mutacin 1140 production. High concentrations of CaCl2 (0.3% w/v) and MgSO4 (0.77% w/v) …
Perceptions Of School From Students In A Rural School Environment, Helen Ruth Patton Kennard
Perceptions Of School From Students In A Rural School Environment, Helen Ruth Patton Kennard
Theses and Dissertations
This study investigated the perceptions of school from students of differing ages, genders, ethnic groups, and grade levels in a rural school environment. The ages were divided into four categories: 11–12 years of age, 13–14 years of age, 15–16 years of age, and 17–19 years of age. The ethnic groups in the school population were African Americans and Caucasians. The different grade levels were 7th through 12th. Wilson and Corbett (1999), in the Report for the Philadelphia Education Fund, “No Excuses”: The Eighth Grade Year in Six Philadelphia Middle Schools, discussed students’ views of what they want their teachers to …
Effects Of Various Fumigants And Alternative Processing Methods On The Safety, Volatile Composition, And Sensory Quality Of Dry Cured Ham, Ramandeep Kaur Sekhon
Effects Of Various Fumigants And Alternative Processing Methods On The Safety, Volatile Composition, And Sensory Quality Of Dry Cured Ham, Ramandeep Kaur Sekhon
Theses and Dissertations
Randomized complete block designs with three replications were utilized to evaluate the effects of fumigation with sulfuryl fluoride (SF) (0, 12, 24, 36 and 72 mg/L), phosphine (PH3) (0, 200 and 1000 ppm at 48 hr), methyl bromide (MB) (0, 4, 8, 16, and 32 mg/L for 48 hr), carbon dioxide (CO2) (0, 60% at 48 hr and 60% at 96 hr) and ozone (O3) (0 ppm and 175 ppm for 48 hr) on the volatile flavor compound concentrations in dry cured ham. Fluoride and SF concentrations increased (P < 0.05) in dry cured hams as SF fumigation concentration increased, but all samples contained fluoride and SF concentrations below the legal limits of 20 and 0.01 ppm, respectively. Also, as phosphine fumigation concentration increased, the residual concentration of phosphine also increased in the hams (P < 0.05), but all samples contained levels that were lower than the legal limit of phosphine in stored food products (0.01 ppm). Minimal differences existed in the presence and concentration of aroma active compounds in fumigated hams when compared to the control. Triangle tests indicated that consumers could not discern (P > 0.75) between the control hams and the fumigated hams. This study …
A Method For Integrating Heterogeneous Datasets Based On Go Term Similarity, Chamali Lankara Thanthiriwatte
A Method For Integrating Heterogeneous Datasets Based On Go Term Similarity, Chamali Lankara Thanthiriwatte
Theses and Dissertations
This thesis presents a method for integrating heterogeneous gene/protein datasets at the functional level based on Gene Ontology term similarity. Often biologists want to integrate heterogeneous data sets obtain from different biological samples. A major challenge in this process is how to link the heterogeneous datasets. Currently, the most common approach is to link them through common reference database identifiers which tend to result in small number of matching identifiers. This is due to lack of standard accession schemes. Due to this problem, biologists may not recognize the underlying biological phenomena revealed by a combination of the data but by …
Identification Of Micrornas In Bovine Spermatozoa With Implications Of Fertility, Lashonda S (Lashonda Shakita) Robertson
Identification Of Micrornas In Bovine Spermatozoa With Implications Of Fertility, Lashonda S (Lashonda Shakita) Robertson
Theses and Dissertations
MicroRNAs are small RNA molecules that could possibly play a major role in fertility. In the experiment, spermatozoa were extracted from bovine followed by an extraction of total RNA. Bovine spermatozoa were extracted from two bulls of different fertility, high and low fertility. An expression array was done to compare the expression levels of the microRNAs. It was shown that thousands of microRNAs are present in bovine spermatozoa but only a small amount was significantly expressed. The microRNAs from low fertility bulls were more highly expressed than those in high fertility bulls. A Bioanalyzer gel was used to confirm the …
Small Signal And Transient Stability Analysis Of Mvdc Shipboard Power System, Seetharama Raju Rudraraju
Small Signal And Transient Stability Analysis Of Mvdc Shipboard Power System, Seetharama Raju Rudraraju
Theses and Dissertations
Recent developments in high power rated Voltage Source Converters (VSCs) have resulted in their successful application in Multi-Terminal HVDC (MTDC) transmission systems and also have potential in the Medium Voltage DC (MVDC) distribution systems. This work presents the findings of stability studies carried out on a zonal MVDC architecture for the shipboard power distribution system. The stability study is confined to rotor angle stability of the power system, i.e. the transient and small signal stability analysis. The MTDC ring structure similar to MVDC shipboard power system was implemented in MATLAB/Simulink to look at the transient behavior of the MVDC system. …
Social Networking Systems Success Model: Assessment And Validation Of The Is Success Model In Social Context, Aaron Michael French
Social Networking Systems Success Model: Assessment And Validation Of The Is Success Model In Social Context, Aaron Michael French
Theses and Dissertations
Developments such as the ubiquity of electronic networks and the breadth of digital platforms beyond simple forums have lead to major economic and social transformations worldwide (Agarwal et al, 2008). This research will explore developments in the area of social networking using Internet technology in order to determine factors that lead to success. Despite considerable growth among the number of online communities available, very few are successful at retaining members and continued usage by its members (Ma & Agarwal, 2007). The purpose of this dissertation is to determine factors leading to a successful social networking site (SNS). Through the unification …