4,730 research outputs found
The Tree of Life: A Review of the Strengths-Based Narrative Approach
This paper reviews the literature on the Tree of Life (ToL), a psychosocial support tool underpinned by narrative therapy. Originally developed to support vulnerable children in East and Southern Africa, ToL draws on the metaphor of a tree, taken from Zimbabwean folklore and collective narrative practice to support groups and communities to overcome difficult life experiences. The aim is to inform practitioners of the key elements of the approach and to inform educational psychology practice
Active Suppression of Pogo on the Space Shuttle
The use of active pogo suppressors on the space shuttle was qualitatively investigated. Suppressor design concepts and the effectiveness of these designs in maintaining the stability of the shuttle vehicle were the primary concerns. Suppressor design concepts were developed by means of a series of parametric stability analyses. These two designs together with two designs provided by NASA were evaluated in detail for control effectiveness, performance relative to a passive suppression device, sensitivity of performance to feedback error, suppressor volume flow requirements, and suppressor development requirements. An active device at the high pressure oxidizer pump inlet was shown to provide a simple and effective design that is insensitive to error in the feedback signal. The sizing of an active suppressor was demonstrated to be dependent upon knowledge of the dynamic characteristics of the system
Analysis of pogo on the space shuttle: Accumulator design guidelines and planar multiengine model development
The design guidelines were generated to support the selection of the baseline accumulator configuration for the space shuttle. They were based upon the elimination of the instabilities that had been predicted for the shuttle system (in the absence of accumulators) using the single-engine model. The multiengine pitch plane stability model was subsequently developed to enable a more refined analysis of the pogo problem. The results obtained with this refined model, in the absence of accumulators, indicated a generally stable system. However, it was found that reasonable adjustment of the axial motion of the feedline aft support on the external tank could induce instability of the system. This instability was eliminated by the addition of high-pressure oxidizer turbopump inlet accumulators to the system. The results obtained with the refined model did not suggest a need to alter the design guidelines that had been obtained previously. The analyses with the multiengine model also treated the question of the use of a phase margin in the system stability requirements
Space shuttle pogo studies
Topics covered include: (1) pogo suppression for main propulsion subsystem operation; (2) application of quarter-scale low pressure oxidizer turbopump transfer functions; (3) pogo stability during orbital maneuvering subsystem operation; and (4) errors in frequency response measurements
SB10-21/22: Resolution Endorsing the University of Montana Civic Knowledge Initiative
SB10-21/22: Resolution Endorsing the University of Montana Civic Knowledge Initiative. This resolution passed unanimously during the September 8, 2021 meeting of the Associated Students of the University of Montana (ASUM)
SB17-21/22: Resolution Amending Section 8.1 of Fiscal Policy to be Consistent with the Bylaws
SB17-21/22: Resolution Amending Section 8.1 of Fiscal Policy to be Consistent with the Bylaws. This resolution passed unanimously during the September 29, 2021 meeting of the Associated Students of the University of Montana (ASUM)
SB84-21/22-Resolution Removing the Sustainability Board from the Bylaws
SB84-21/22-Resolution Removing the Sustainability Board from the Bylaws. This resolution passed 17Y-0N-6A during the February 16, 2022 meeting of the Associated Students of the University of Montana (ASUM)
SB42-21/22: Resolution Urging the University of Montana Foundation, The University of Montana, and Students to Form a Working Group to Explore Fossil Fuel Reinvestment
SB42-21/22: Resolution Urging the University of Montana Foundation, The University of Montana, and Students to Form a Working Group to Explore Fossil Fuel Reinvestment. This resolution passed 18Y-2N-0A during the November 10, 2021 meeting of the Associated Students of the University of Montana (ASUM)
SB14-21/22: Resolution Enforcing an Absence Policy for Failure to Attend Committee Meetings
SB14-21/22: Resolution Enforcing an Absence Policy for Failure to Attend Committee Meetings. This resolution passed unanimously during the September 29, 2021 meeting of the Associated Students of the University of Montana (ASUM)
SB39-21/22: Resolution Randomizing Seating at Senate Meetings
SB39-21/22: Resolution Randomizing Seating at Senate Meetings. This resolution passed 15Y-5N-0A during the October 27, 2021 meeting of the Associated Students of the University of Montana (ASUM)
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