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Now showing items 55341-55350 of 66811
Perennial grass community response to severe drought, topo-edaphic variation, and long-term herbivory on the Edwards Plateau of Texas
(Texas A&M University, 2005-11-01)
Perennial grass vegetation dynamics of heavy grazing, moderate grazing and ungrazed treatments were analyzed during two extreme drought events: the drought of 1951 to 1956 and the drought events centered on the year 2000. ...
Gust Load Alleviation for an Aeroelastic System Using Nonlinear Control
(2010-10-12)
The author develops a nonlinear longitudinal model of an aircraft modeled by
rigid fuselage, tail, and wing, where the wing is attached to the fuselage with a torsional
spring. The main focus of this research is to retain ...
Experimental Testing of an Electrical Submersible Pump Undergoing Abrasive Slurry Erosion
(2013-04-01)
The Electrical Submersible Pump (ESP) manufactured by Baker Hughes, model no. WJE-1000 is designed for wells that are expected to have a high content of abrasive solids. It is a mixed flow, tandem compression type pump. ...
Assessment of arsenate bioavailability in iron-rich environments: development of a high-pressure liquid chromatography method of quanitification for arsenate sorbed by Fe3+-substituted chelating resins in arsenic-bearing ferrihydrite suspensions
(Texas A&M University, 2005-08-29)
Given that the mobility, bioavailability, and toxicity of arsenate in natural systems is often
controlled by the strong binding capacity of iron oxyhydroxides, the objective of this study was to
document the interactions ...
A Classic Model in a Low Fertility Context: The Proximate Determinants of Fertility in South Korea and the United States
(2011-08-08)
John Bongaarts' proximate determinants model of fertility has accounted for over 90 percent of variation in the total fertility rate (TFR) of primarily developing nations and historical populations. Recently, dramatically ...
Distinct DNA Replication Programs in Tetrahymena Thermophila
(2015-05-05)
DNA replication is a vital process to duplicate genetic material for inheritance. A conventional mitotic cell cycle is composed of G1, S, G2 and M phases, and DNA is replicated during S phase. Besides the conventional cell ...
The significance of ammonium adsorption on lower laguna madre (texas) sediments
(2009-05-15)
The work presented in this dissertation focuses on +
4 NH in marine sediments and
attempts to elucidate some of the specific pathways and processes affecting +
4 NH in
coastal marine regions. The majority of work was ...
Evaluation of Nutritional Strategies Focused on Exogenous Enzymes and Synthetic Amino Acids Aimed at Maximizing Broiler Performance and Nutrient Utilization
(2016-08-04)
The objective of this research was to evaluate nutritional strategies focused on exogenous enzymes and synthetic amino acids aimed at maximizing broiler performance and nutrient utilization. Four experiments were conducted ...
A STUDY ON SPHERICAL EXPANDING FLAME SPEEDS OF METHANE, ETHANE, AND METHANE/ETHANE MIXTURES AT ELEVATED PRESSURES
(2010-07-14)
High-pressure experiments and chemical kinetics modeling were performed for laminar spherically expanding flames for methane/air, ethane/air, methane/ethane/air and propane/air mixtures at pressures between 1 and 10 atm ...
Highly Scalable Asynchronous Computing Method for Partial Differential Equations: A Path Towards Exascale
(2016-05-03)
Many natural and engineering systems are governed by nonlinear partial differential equations (PDEs) which result in a multiscale phenomena, e.g. turbulent flows. Numerical simulations of these problems are computationally ...