Thesis (Ph. D.)--University of Texas at Austin, 2006. / Vita. Includes bibliographical references.

Thesis (Ph. D.)--Dept. of Psychology. University of Missouri--Kansas City, 2005. / "A dissertation in psychology." Advisor: Diane L. Filion. Typescript. Vita. Title from "catalog record" of the print edition Description based on contents viewed March 12, 2007. Includes bibliographical references (leaves 115-120). Online version of the print edition.

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Although concrete is widely considered a very durable material, if conditions are such, it can be vulnerable to deterioration and early distress development. Alkali-Silica Reaction (ASR) is a major durability problem in concrete structures. It is a chemical reaction between the reactive silica existent in some types of rocks and alkali hydroxides in the concrete pore water. The product of this reaction is a gel that is hygroscopic in nature. When the gel absorbs moisture, it swells leading to tensile stresses in concrete. When those stresses exceed the tensile strength of concrete, cracks occur. The main objective of this study was to address a method of testing concrete materials as a combination to assist engineers to effectively mitigate ASR in concrete. The research approach involved capturing the combined effects of concrete materials (water cement ratio, porosity, supplementary cementitious materials, etc.) through a method of testing to allow the formulation of mixture combinations resistant to ASR leading to an increase in the life span of concrete structures. To achieve this objective, a comprehensive study on different types of aggregates of different reactivity was conducted to formulate a robust approach that takes into account the factors affecting ASR; such as, temperature, moisture, calcium concentration and alkalinity. A kinetic model was proposed to determine aggregate ASR characteristics which were calculated using the System Identification Method. Analysis of the results validates that ASR is a thermally activated process and therefore, the reactivity of an aggregate can be characterized in terms of its activation energy (Ea) using the Arrhenius equation. Statistical analysis was conducted to determine that the test protocol is highly repeatable and reliable. To relate the effect of material combinations to field performance, concrete samples with different w/cm?s and fly ash contents using selective aggregates were tested at different alkalinities. To combine aggregate and concrete characteristics, two models were proposed and combined. The first model predicts the Ea of the aggregate at levels of alkalinity similar to field conditions. The second model, generated using the Juarez- Badillo transform, connects the ultimate expansion of the concrete and aggregate, the water cement ratio, and the fly ash content to the Ea of the rock. The proposed models were validated through laboratory tests. To develop concrete mixtures highly resistant to ASR, a sequence of steps to determine threshold total alkali in concrete were presented with examples. It is expected that the knowledge gained through this work will assist government agencies, contractors, and material engineers, to select the optimum mixture combinations that fits best their needs or type of applications, and predict their effects on the concrete performance in the field.

As the pre-hospital emergency medical service experienced a series of interactions, so they should be well-managed to improve the needs of patients and the quality of pre-hospital EMS. Based on the approaches of service encounter, we can further understand and guide the performance of EMT and the reactions from patients. Especially besides the technical aspect, we expected that the quality of pre-hospital EMS and the evaluation made by general people will be also emphasized. We can see that partly EMS disputive events were happened because there are some communication problems between EMT and family members. And the communication problems were almost originated from the mutual mis -understanding and self-servicing biases. The anticipation and consciousness demand difference enlarges, causes to have the dispute. The research first carries on the important instance to investigate, collect 42 senior EMT from Kaohsiung city government fire department, to provide satisfaction events 31, not satisfactory events 23 carry on the nature analysis. The reasons of satisfy or dissatisfy includes: The service attitude, rescues the specialized skill, the communication ability, extra provides the service, coordinates the patient demand, rescues factor and so on equipment and rescue time. Then depends on the obtained each factor and the reference correlation literature discussion carries on the populace to ask the volume design, asks the volume revision and the test, the populace questionnaire survey and so on. Finally analyzes the populace to ask the volume adjusts the result, to have rescued the service contact experience each factor and the populace oral traditions response relations. The research arranges part-time workers carries on the street corner to ask the volume and the recycling, total sends out 1060, recycles 928, effectively asked volume 781, invalid ask volume 147. In view of 781 effectively asked the volume carries on a letter analysis using the SPSS software, the factor analysis, the t-test, variance statistical method and so on and regression analysis. Screens affects populace oral traditions to be supposed the multiple coefficient of correlation (correlative value) respectively is: Rescues the personnel the clothing correct manners discipline (0.236), the service attitude(0.254), the first aid technology (0.351), generally rescues the equipment (0.243), the specialty rescues the equipment (0.214) and the rescue time (0.261)and so on. After regression analysis, by factor forecast (first aid technology, specialized equipment, general equipment) oral traditions response result: R2¡@¡@¡×0.137, the F test reaches extremely reveals the standard. Conclusion¡GUnder the government limited expenditure, wants to enhance the populace positive oral traditions to respond that, first should strengthen rescues the personnel the first aid technology, purchases the specialized first aid equipment and the general equipment in turn.

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A formal [3+3] cycloaddition strategy to substituted glutarimides was studied. N-Alkyl-sulfonylacetamides and various a,b-unsaturated esters were used as starting materials. Regioselective reduction of N-alkyl-3-sulfonyl glutarimides and the applications in pharmaceuticals and natural product synthesis

Systems of semilinear parabolic differential equations arise in the modelling of many chemical and biological systems. We consider m component systems of the form ut = DΔu + f (t, x, u) ∂uk/∂η =0 k =1, ...m where u(t, x)=(uk(t, x))mk=1 is an unknown vector valued function and each u0k is zero outside Ωσ(k), D = diag(dk)is an m × m positive definite diagonal matrix, f : R × Rn× Rm → Rm, u0 is a componentwise nonnegative function, and each Ωi is a bounded domain in Rn where ∂Ωi is a C2+αmanifold such that Ωi lies locally on one side of ∂Ωi and has unit outward normal η. Most physical processes give rise to systems for which f =(fk) is locally Lipschitz in u uniformly for (x, t) ∈ Ω Ã— [0,T ] and f (·, ·, ·) ∈ L∞(Ω Ã— [0,T ) × U ) for bounded U and the initial data u0 is continuous and nonnegative on Ω. The primary results of this dissertation are three-fold. The work began with a proof of the well posedness for the system . Then we obtained a global existence result if f is polynomially bounded, quaipositive and satisfies a linearly intermediate sums condition. Finally, we show that systems of reaction-diffusion equations with large diffusion coeffcients exist globally with relatively weak assumptions on the vector field f.

Thesis (Ph. D.)--West Virginia University, 2008. / Title from document title page. Document formatted into pages; contains x, 225 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 113-119).