Psychology Commons^™

Lignite Liquefaction Using Carbon Monoxide And Water In A Hot-Charge Batch Autoclave, Michael L. Swanson

Theses and Dissertations

The effects of temperature history on the liquefaction of lignite were investigated using the UND hot-charge, time-sampled batch autoclave facility. Approximately two hundred grams of moisture- and ash-free lig nite, one hundred grams of water, four hundred grams of hydrogenated anthracene oil solvent and carbon monoxide gas were reacted in both cold- charge and hot-charge experiments. The oil yields and overall conver sions were determined by extraction with cyclohexane and tetrahydrofuran, respectively. Maximum operating pressures ranged from 3670 psig to 3925 psig and the maximum reaction temperature was approximately 420°C in all cases.

Oil yields and overall conversion ranged from …

Design Optimization Of Slider-Crank Mechanisms Subject To Coulomb Bearing Friction, Anthony J. Pascuzzi

Theses and Dissertations

Optimization techniques are applied to the design of slider-crank mechanisms operating as single acting compressors subject to Coulomb bear ing friction. The dynamic force analysis is performed by the solution of a set of nonlinear equations in dimensionless form. The optimization re sults presented are for various cases of inertia, friction, and external loading.

The optimization procedure developed minimizes a weighted sum of the input work and bearing shear stress by adjusting the mechanism's dimensions. The independent dimensions that are varied are the connecting rod length, the offset, and the three bearing radii. The results of the optimization are different …

Arts Education In A Teacher Education Curriculum: A Model Based On Comparative Analysis Of Arts Education Theories, Jean A. L. Olson

Theses and Dissertations

In this study the historical role of the arts in America was briefly traced as well as the history of federal interest in the arts and arts education. The importance of arts education for the individual, the school, and society was stated. Four basic tenets of arts education were derived from research and literature which provided criteria for effective arts activities and strategies. These tenets suggest that arts education (1) should be based on experiential, discovery-based, process-oriented approaches; (2) should be viewed as a developmental activity; (3) should focus on the cognitive, affective, and psychomotor domains of learning; and (4) …