2,725 research outputs found

    Evaluation Polyurethane Elastomeric Compound Cps-796-65, Type II

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    Performance evaluation tests on encapsulating polyurethane elastomeric compound, type II

    Instability thresholds for flexible rotors in hydrodynamic bearings

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    Two types of fixed pad hydrodynamic bearings (multilobe and pressure dam) were considered. Optimum and nonoptimum geometric configurations were tested. The optimum geometric configurations were determined by using a theoretical analysis and then the bearings were constructed for a flexible rotor test rig. It was found that optimizing bearings using this technique produces a 100% or greater increase in rotor stability. It is shown that this increase in rotor stability is carried out in the absence of certain types of instability mechanisms such as aerodynamic crosscoupling. However, the increase in rotor stability should greatly improve rotating machinery performance in the presence of such forces as well

    1967 August 6 - Ralph R. Flack

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    Series 1.1.2 - Fay Webb Gardner; Personal Papers; Correspondence Correspondence from Ralph R. Flack. Includes copy of the Christenberry Lee paper.https://digitalcommons.gardner-webb.edu/fay-webb-gardner-correspondence/1031/thumbnail.jp

    1958, October 14 - Ralph R. Flack

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    Series 1.1.2 - Fay Webb Gardner; Personal Papers; Correspondence Correspondence from Ralph R. Flack.https://digitalcommons.gardner-webb.edu/fay-webb-gardner-correspondence/1020/thumbnail.jp

    An evaluation of Te Rau Puawai workforce 100: Stakeholder perspectives

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    To evaluate the Te Rau Puawai programme, the Ministry of Health commissioned the Maori and Psychology Research Unit of the University of Waikato in July 2001. The overall aim of the evaluation was to provide the Ministry with a clearer understanding of the programme including: the perceived critical success factors, the barriers if any regarding Te Rau Puawai, the impact of the programme, the extent to which the programme may be transferable, gaps in the programme, and suggested improvements. There are a number of stakeholders who do not have a direct role in the provision of Te Rau Puawai. These people are not involved in the day to day running of Te Rau Puawai (as do, for example, the coordinator, support team or academic mentors), nevertheless they play an important role, contributing in a variety of ways to the programme

    Characterising a tunable, pulsed atomic beam using matter-wave interferometry

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    We describe the creation and characterisation of a velocity tunable, spin-polarized beam of slow metastable argon atoms. We show that the beam velocity can be determined with a precision below 1% using matter-wave interferometry. The profile of the interference pattern was also used to determine the velocity spread of the beam, as well as the Van der Waals (VdW) co-efficient for the interaction between the metastable atoms and the multi-slit silicon nitride grating. The VdW co-efficient was determined to be C_{3} = 1.84 ± 0.17 a.u., in good agreement with values derived from spectroscopic data. Finally, the spin polarization of the beam produced during acceleration of the beam was also measured, demonstrating a spatially uniform spin polarization of 96% in the m = +2 state

    Evidence of strategic periodicities in collective conflict dynamics

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    We analyze the timescales of conflict decision-making in a primate society. We present evidence for multiple, periodic timescales associated with social decision-making and behavioral patterns. We demonstrate the existence of periodicities that are not directly coupled to environmental cycles or known ultraridian mechanisms. Among specific biological and socially-defined demographic classes, periodicities span timescales between hours and days, and many are not driven by exogenous or internal regularities. Our results indicate that they are instead driven by strategic responses to social interaction patterns. Analyses also reveal that a class of individuals, playing a critical functional role, policing, have a signature timescale on the order of one hour. We propose a classification of behavioral timescales analogous to those of the nervous system, with high-frequency, or α\alpha-scale, behavior occurring on hour-long scales, through to multi-hour, or β\beta-scale, behavior, and, finally γ\gamma periodicities observed on a timescale of days.Comment: 22 pages, 7 figures, 1 table. Accepted for publication in Journal of the Royal Society Interfac
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