Critical Perspectives on Undergraduate Black Women

This project is one of reclamation, an attempt to explore and name Black undergraduate women’s experiences in higher education scholarship. As a Black queer trans person, Audre Lorde knew all too well the ways in which society defined Black women and the dangers associated with the confinement embedded in those definitions. Today, there are many fantasies about Black women in higher education that must be critically interrogated and examined to illuminate the complexities of our experiences across the higher education landscape. This project is one effort devoted to the interruption of epistemic violence enacted to silence, marginalize, and dehumanize Black women, particularly at the undergraduate level. Scholars and practitioners know little about the experiences of Black undergraduate women, and what is presumed to be known has in large part been constructed outside Black women’s communities, devoid of a critical lens, and treated as insignificant

The development and use of spoilers as vortex attenuators

Results are presented of groundbased and flight investigations performed to develop spoilers as trailing vortex alleviation devices. Based on the results obtained in these investigations, it was found that the induced rolling moment on a trailing model can be reduced by spoilers located near the midsemispan of a vortex generating wing. Substantial reductions in induced rolling moment occur when the spoiler vortex attenuator is located well forward on both unswept and swept wing models. In addition, it was found that existing flight spoilers on the jumbo-jet transport aircraft can be effective as trailing vortex attenuators

Insect contamination protection for laminar flow surfaces

The ability of modern aircraft surfaces to achieve laminar flow was well-accepted in recent years. Obtaining the maximum benefit of laminar flow for aircraft drag reduction requires maintaining minimum leading-edge contamination. Previously proposed insect contamination prevention methods have proved impractical due to cost, weight, or inconvenience. Past work has shown that insects will not adhere to water-wetted surfaces, but the large volumes of water required for protection rendered such a system impractical. The results of a flight experiment conducted by NASA to evaluate the performance of a porous leading-edge fluid discharge ice protection system operated as an insect contamination protections system are presented. In addition, these flights explored the environmental and atmospheric conditions most suitable for insect accumulation

Low-speed wind-tunnel investigation of wing fins as trailing-vortex-alleviation devices on a transport airplane model

The trailing-vortex-alleviation effectiveness of both a one- and a two-fin configuration (semicircular with a radius of 0.043 semispan) on a jumbo-jet transport airplane model in its landing configuration was investigated in the Langley V/STOL tunnel, by the trailing-wing sensor technique. The fins were located on the upper surface of the transport model wing along the 30-percent-chord line. The fin configurations were effective in reducing the vortex-induced rolling moment, by amounts varying from 28 to 60 percent, on the trailing wing model located at a distance of 7.8 transport model wing spans downstream of the transport model. The flow over the fins and over the transport airplane model wing downstream of the fins was observed to be separated and turbulent. All fin configurations caused a reduction in maximum lift coefficient, a positive increment in drag coefficient, and an increment in nose-up pitching-moment coefficient on the transport airplane model

Effects of a military cargo pod and tail fins on the aerodynamic characteristics of a large wide-body transport model

Wind tunnel tests were conducted on a 0.03 scale model of a large wide-body commercial aircraft to determine the effects on the static aerodynamic characteristics resulting from the attachment of a belly pod for the long-range deployment of outsize military equipment. The effectiveness of horizontal-tip fins in augmenting directional stability was investigated. At a test Reynolds number of 1.08 x 1,000,000, the addition of the pod results in an increase in total drag of approximately 20 percent. Trim drag due to the pod is very small. Although the pod produces a significant decrease in directional stability, the addition of the tip fins restores some of the stability, particularly at the lower angles of attack

Thermodynamic, transport, and flow properties for the products of methane burned in oxygen-enriched air

Thermodynamic, transport, and flow properties for products of methane burned in oxygen-enriched ai

The Relationship Between the Construction of Multidimensional Self-Concept in Second Grade Children and the Level of Teacher Endorsement of Developmentally Appropriate Practice

The relationship between level of endorsement of developmentally appropriate practice of 14 second grade teachers and the construction of self-concept of children in their classrooms was examined. Teachers were given The Primary Teacher Questionnaire, a beliefs scale that assesses level of endorsement of developmentally appropriate practice, and classified as having a higher or lower endorsement of developmentally appropriate practice. Four children, two boys and two girls, were randomly selected from each of the 14 classrooms and were given The Self Description Questionnaire I, a multidimensional measure of self-concept of children ages 5-8 years of age, in November and again in April

Low speed wind tunnel investigation of span load alteration, forward-located spoilers, and splines as trailing-vortex-hazard alleviation devices on a transport aircraft model

The effectiveness of a forward-located spoiler, a spline, and span load alteration due to a flap configuration change as trailing-vortex-hazard alleviation methods was investigated. For the transport aircraft model in the normal approach configuration, the results indicate that either a forward-located spoiler or a spline is effective in reducing the trailing-vortex hazard. The results also indicate that large changes in span loading, due to retraction of the outboard flap, may be an effective method of reducing the trailing-vortex hazard