Dual output variable pitch turbofan actuation system

An improved actuating mechanism was provided for a gas turbine engine incorporating fan blades of the variable pitch variety, the actuator adapted to rotate the individual fan blades within apertures in an associated fan disc. The actuator included means such as a pair of synchronizing ring gears, one on each side of the blade shanks, and adapted to engage pinions disposed thereon. Means were provided to impart rotation to the ring gears in opposite directions to effect rotation of the blade shanks in response to a predetermined input signal. In the event of system failure, a run-away actuator was prevented by an improved braking device which arrests the mechanism

Nat R. Grisold to Dr. Silver, 13 November 1963

Professional correspondenc

Nat R. Griswold to Dr. Silver, 4 December 1963

Professional correspondenc

The Critical Workshop: Writing Revision and Critical Pedagogy in the Middle School Classroom

This dissertation addresses the question of whether focusing on revision in writing instruction can be a form of critical pedagogy in middle school classrooms. Building on the work of A. Suresh Canagarajah, Lisa Delpit, Paulo Freire, Henry Giroux, Kay Halasek, Joseph Harris, Amy Lee, Timothy Lensmire, Min-Zhan Lu, Peter McLaren, Richard Ohmann, Ira Shor, and others, I explore and challenge commonly held attitudes about revision and language, primarily that the goal of revision is to correct errors and that language and its conventions should be thought of in terms of correctness. I explore the ways in which traditional writing workshops both support and fall short of critical pedagogy, and how a revised writing workshop—a critical workshop—might be a vehicle for critical pedagogy. Would focusing on revisions give students the attitude, ownership, and agency to enable them to identify what might be better in their lives and the world, and to see themselves as agents of that change? As a teacher-researcher and teaching-researcher, I investigated students’ attitudes toward revision to see if they became more critical during and after exposure to the critical workshop. In other words, did revising become less about judging, earning grades, and correction? In the minds of students, did revising writing become more about making writing stronger, seeing applications of revision to other areas of their lives, considering their audience and others, taking risks in their writing, and opening their minds to new ideas? Did their critical thinking become more complex? Second, I used my data to explore whether students appeared to feel more ownership of their writing, and what kinds of agency this ownership led to. My primarily qualitative (and partly quantitative) analysis indicates that focusing on revisions in the critical workshop can significantly change students’ attitudes toward revision to a more critical way of thinking. My data also indicates that the critical workshop helps to create a variety of feelings of ownership and agency in students. I propose that this approach to writing can be a form of critical pedagogy that is developmentally appropriate for eighth-grade students

A study of commuter airplane design optimization

Problems of commuter airplane configuration design were studied to affect a minimization of direct operating costs. Factors considered were the minimization of fuselage drag, methods of wing design, and the estimated drag of an airplane submerged in a propellor slipstream; all design criteria were studied under a set of fixed performance, mission, and stability constraints. Configuration design data were assembled for application by a computerized design methodology program similar to the NASA-Ames General Aviation Synthesis Program

The native bee fauna of the Palouse Prairie (Hymenoptera: Apoidea)

While synoptic collections provide data on the range and general composition of the North American bee fauna, bee communities associated with specific habitats are largely uncharacterized.  This report describes the community of native bees currently found in remnant fragments of the Palouse Prairie of northern Idaho and southeastern Washington State.  Native bees were collected using standardized collection techniques including blue vane traps, colored pan traps and aerial netting.  More than 13,000 individuals were collected, representing at least 174 species and 36 morphospecies in 29 genera.  These data provide the most thorough characterization of the bee fauna of this vulnerable ecosystem, as well as community level information on bee species of unknown conservation status.  These results are relevant to regional conservation efforts and, more broadly, are representative of conditions in fragmented grasslands surrounded by intense agriculture, a common global land use pattern of conservation concern

EVA Equipment for Satellite Service

Requirements are projected for performing orbital satellite service. Emphasis is on defining the role of Extravehicular Activity (EVA) required to support this future space activity. Specific EVA service techniques and equipment are concepted, building on initial baseline service capability supported by the Shuttle Orbiter, Remote Manipulator System, Extravehicular Mobility Unit, and Manned Maneuvering Unit. New EVA concepts discussed are compatible with current and near-term satellites, projected evolution of the Space Transportation System, and anticipated future space construction requirements

ECONOMIC IMPACTS ON THE ILLINOIS ECONOMY OF ALTERNATIVE DAIRY PRODUCTION SYSTEMS

Dairy in Illinois has declined in farm numbers, cows, and value of dairy product. Alternative dairy systems (intensive grazing, traditional, and a concentrated feeding system) were evaluated for their potential to sustain dairy in Illinois. The economic impact of each system on the Illinois economy was evaluated using IMPLAN.Livestock Production/Industries,

PUBLIC PERCEPTIONS REGARDING GROWTH OF THE DAIRY INDUSTRY IN ILLINOIS

Community opposition to dairies has altered location decisions by milk producers. Our objective was to identify residents' perceptions towards dairy by individual and community characteristics. A mail survey of residents of dairy counties and non-dairy counties was conducted. Dairy county residents were more willing to live close to a dairy.Livestock Production/Industries,