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Temporal genetic structure of feral honey bees (Hymenoptera: Apidae) in a coastal prairie habitat of southern Texas: impact of Africanization
(Texas A&M University, 2004-09-30)
The goal of this study was to examine the impact of Africanization on the genetic structure of the Welder Wildlife Refuge feral honey bee population by scoring mtDNA and microsatellite polymorphisms. Adult honey bee workers, ...
GPS receiver self survey and attitude determination using pseudolite signals
(Texas A&M University, 2004-11-15)
This dissertation explores both the estimation of various parameters from a multiple antenna GPS receiver, which is used as an attitude sensor, and attitude determination using GPS-like Pseudolite signals. To use a multiple ...
The effect of task structure, practice schedule, and model type on the learning of relative and absolute timing by physical and observational practice
(Texas A&M University, 2004-11-15)
Three experiments compared learning of relative and absolute timing of a sequential key-pressing task by physical and observational practice. Experiment 1 compared a task with a complex internal structure (goal proportions ...
Topics in ordinal logistic regression and its applications
(Texas A&M University, 2004-11-15)
Sample size calculation methods for ordinal logistic regression are proposed to test statistical hypotheses. The author was motivated to do this work by the need for statistical analysis of the red imported fire ants ...
Dissection of defense responses of skl, an ethylene insensitive mutant of Medicago truncatula
(Texas A&M University, 2004-11-15)
The interactions between Medicago truncatula and Phytophthora medicaginis were examined using skl, a mutant blocked in ethylene perception, and a range of wild accessions of this plant species. P. medicaginis infection ...
Essays on the workings and uses of futures markets
(Texas A&M University, 2004-09-30)
This dissertation investigates various issues of interest regarding the workings and uses of commodity futures markets. Chapter II evaluates the relative performances of various estimators of bid-ask spreads in futures ...
The transfer of training and skills by Texas State 4-H Council members: A qualitative study
(Texas A&M University, 2004-09-30)
This study examined the elements that affect the transfer of training and skills by Texas State 4-H Council members. It described the patterns of motivation and learning styles of former State 4-H Council members, as well ...
Bayesian multivariate spatial models and their applications
(Texas A&M University, 2004-11-15)
Univariate hierarchical Bayes models are being vigorously researched for use in disease mapping, engineering, geology, and ecology. This dissertation shows how the models can also be used to build modelbased risk maps for ...
The neurocognitive implications of depressive symptoms in youth
(Texas A&M University, 2006-10-30)
Research indicates that cognitive and neuropsychological functions are adversely affected by symptoms of depression (Teeter & Semrud-Clikeman, 1997). In addition to deficits in attention and memory, depressive symptomatology ...
Fractional-N PLL with 90 degree phase shift lock and active switched-capacitor loop filter
(Texas A&M University, 2006-10-30)
Phase locked loops (PLL) are used in a variety of RF integrated applications
because of their ability to generate precise clock signals. These applications include
clock recovery systems, frequency synthesizers and frequency ...