295 research outputs found
Development of irrigation in the Bend area c. 1890 to 1940
No full textprepared by: Dwight A. Smith, Cultural Resources Specialist.Title from PDF title page (viewed on January 29, 2020).This archived document is maintained by the State Library of Oregon as part of the Oregon Documents Depository Program. It is for informational purposes and may not be suitable for legal purposes.Includes bibliographical references (pages 8-9).Mode of access: Internet from the Oregon Government Publications Collection.Text in English
Aerodynamic Shape Optimization Using the Discrete Adjoint of the Navier-Stokes Equations: Applications Toward Complex 3D Configutations
No full textWithin the next few years, numerical shape optimization based on high fidelity methods is likely to play a strategic role in future aircraft design. In this context, suitable tools have to be developed for solving aerodynamic shape optimization problems, and the adjoint approach - which allows fast and accurate evaluations of the gradients with respect to the design parameters - is seen as a promising strategy. After describing the theory of the viscous discrete adjoint method and its implementation within the unstructured RANS solver TAU, this paper describes application for aerodynamic shape optimization. First wing and fuselage designs of the DLR-F6 wing-body aircraft are presented. A step forward in complexity is considered by applying the adjoint for flap and slat optimal settings of the DLR-F11 model, a wing-body aircraft in high-lift configuration. On all cases presented, optimization were successfully performed within a limited number of flows evaluations
Effect of group-14 and group-16 substitution on the photophysics of structurally related donor–acceptor polymers
No full textA series of eight polymers based on the parent structure, poly[2,6-(4,4-bis-(2-ethylhexyl)-4H-cyclopenta[2,1-b;3,4-b′]-dithiophene)-alt-4,7-(2,1,3-benzothiadiazole)] (PCPDTBT), were synthesized for a systematic group-14 and group-16 single atom substitution study. The eight polymers were constructed with C/Si/Ge and S/Se/Te varied in the donor and acceptor, respectively. By examining experimental spectroscopic data and DFT calculated geometry and electronic structure, we gain new physical insights into the effects of heavy atom substitution at different positions in a donor–acceptor polymer. Absorption and emission experiments demonstrate that group-14 substitution in the donor unit only slightly blue shifts the long wavelength absorption (HOMO to LUMO transition) and that group-16 substitution in the acceptor affects this absorption to a much greater extent. Solvatochromism experiments show that the charge transfer excited state is most polarized when the acceptor contains a lighter atom and is influenced very little by the atom in the donor. Changing the atom in the acceptor has less effect on the absorption of the Si-donor and Ge-donor polymers than the C-donor polymers. Polymers that contain C-donors are stronger light absorbers than their Si-donor and Ge-donor analogues regardless of which atom is in the acceptor position. These results clarify the effects of single atom substitution on donor–acceptor polymers and aid in the future design of polymers containing heavy atoms.Peer reviewedFinal article publishe
Just Indignation: The National Association of Colored Women, from Moral Reformers to Radical Racial Activists, 1895-1920s
No full textNo abstract prepared.Histor
Turning Bad Girls Into Ladies: Female Juvenile Delinquency in Texas in the Twentieth Century
No full textThis thesis examines the social constructs of gender and race in Texas' Juvenile Justice system after World War II. The Texas Youth Commission attempted to transform wayward girls by enforcing rules, regulations, and curricula that reinforced socially prescribed gender roles. However, these rules, regulations, curricula, and expectations depended on the girl's race. This thesis also places post-war Texas juvenile delinquency into a larger Cold War context.Histor
The Soldier Diplomat: Walter Bedell Smith, American Ambassador to Moscow, 1946-1949
No full textNo abstract prepared.Histor
Poliomyelitis in the Lone Star State: A Brief Examination in Rural and Urban Communities
No full textNo abstract prepared.Histor
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