4,482 research outputs found

    Questions open to infinity and the legitimacy of wonder in university curricula

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    Drawing on the work of prominent atheists and theists, this article argues that any genuinely comprehensive vision of education should include space on the curriculum for subjects such as Theology. Theology is an example of a subject which pushes questioning to infinity, thereby allowing for insight, potential discovery and wonder. The article identifies problems in education systems framed by narrow learning outcomes. These unduly limit the scope for legitimate enquiry and restrict the reach of education. Scholars from a range of disciplines with differing worldviews make a case for a more open educational ambition

    Surrogate measures: A proposed alternative in human factors assessment of operational measures of performance

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    Surrogate measures are proposed as an alternative to direct assessment of operational performance for purposes of screening agents who may have to work under unusual stresses or in exotic environments. Such measures are particularly proposed when the surrogate can be empirically validated against the operational criterion. The focus is on cognitive (or throughput) performances in humans as opposed to sensory (input) or motor (output) measures, but the methods should be applicable for development of batteries which will tap input/output functions. A menu of performance tasks is under development for implementation on a battery-operated portable microcomputer, with 21 tests currently available. The tasks are reliable and become stable in minimum amounts of time; appear sensitive to some agents; comprise constructs related to actual job tasks; and are easily administered in most environments. Implications for human factors engineering studies in environmental stress are discussed

    Deep ocean disposal of sewage sludge off Orange County, California: a research plan

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    Even though the discharge of sludge into the ocean via an outfall is not now permitted, this research plan has been prepared to show what could be learned with a full scale experimental sludge discharge of 150 dry tons/day by the County Sanitation Districts of Orange County into deep water (over 1000 feet). To provide a wide range of inputs and evaluation, a broad-based Research Planning Committee was established to advise the Environmental Quality Laboratory on the overall content and details of the research plan. Two meetings were held at EQL on: March 4-5, 1982: The entire Committee July 19-20, 1982: A working subgroup of the Committee The entire Committee is listed in Appendix B, with footnotes to indicate meeting attendance. Those unable to come to a meeting were asked to comment on the drafts by mail or telephone. We gratefully acknowledge the members of the Research Planning Committee for their generous help in formulating the research tasks and reviewing report drafts

    Evaluation of the utility of sediment data in NASQAN (National Stream Quality Accounting Network)

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    Monthly suspended sediment discharge measurements, made by the USGS as part of the National Stream Quality Accounting Network (NASQAN), are analysed to assess the adequacy in terms of spatial coverage, temporal sampling frequency, accuracy of measurements, as well as in determining the sediment yield in the nation's rivers. It is concluded that the spatial distribution of NASQAN stations is reasonable but necessarily judgemental. The temporal variations of sediment data contain much higher frequencies than monthly. Sampling error is found to be minor when compared with other causes of data scatter which can be substantial. The usefulness of the monthly measurements of sediment transport is enhanced when combined with the daily measurements of water discharge. Increasing the sampling frequency moderately would not materially improve the accuracy of sediment yield determinations

    Numerical Analysis of Solid Rocket Motor Instabilities With AP Composite Propellants

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    A non-steady model for the combustion of ammonium perchlorate composite propellants has been developed in order to be incorporated into a comprehensive gasdynamics model of solid rocket motor flow fields. The model including the heterogeneous combustion and turbulence mechanisms is applied to nonlinear combustion instability analyses. This paper describes the essential mechanisms and features of the model and discusses the methodology of non-steady calculations of the combustion instabilities of solid rocket motors

    Assessment of alternative strategies for sludge disposal into deep ocean basins off Southern California

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    The general framework of engineering alternatives for regional ocean sludge disposal is well described in a report by Raksit, and will not be repeated here. The various ocean disposal alternatives are less costly than all land-disposal and incineration/pyrolysis systems studied. Even though ocean sludge disposal is currently contrary to both state and federal regulations, it is hoped that this study will advance our scientific and engineering knowledge of the behavior and effects of sludge discharge in deep water, in case the regulatory policy is reexamined in the future. With this report we hope we have demonstrated the potential and difficulties of some new modeling techniques for predicting the effects of sludge discharge in the ocean. In the future. we believe it will be possible to formulate policy of ocean sludge discharges with much better case-by-case predictions of impacts for comparison with other alternatives (such as land disposal). not only for the Los Angeles/Orange County areas, but for all coastal urban areas

    The Importance of Statistical Power When Testing for Independence in Animal Movements

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    Testing For Independence of Observations in Animal Movements

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    Many analyses of animal movements assume that an animal's position at time t + 1 is independent of its position at time t, but no statistical procedure exists to test this assumption with bivariate data. Using empirically derived critical values for the ratio of mean squared distance between successive observations to mean squared distance from the center of activity, we demonstrate a bivariate test of the independence assumption first proposed by Schoener. For cases in which the null hypothesis of independence is rejected, we present a procedure for determining the time interval at which autocorrelation becomes negligible. To illustrate implementation of the test, locational data obtained from a radio-tagged adult female cotton rat (Sigmodon hispidus) were used. The test can be used to design an efficient sampling schedule for movement studies, and it is also useful in revealing behavioral phenomena such as home range shifting and any tendency of animals to follow prescribed routes in their daily activities. Further, the testmay provide a means of examining how an animal's use of space is affected by its internal clock

    HAPTEN-SPECIFIC STIMULATION OF SECONDARY B CELLS INDEPENDENT OF T CELLS

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    Treatment of spleen cell suspensions from immunized mice with anti-theta serum and complement before transfer to nonimmune irradiated recipients reduced the degree of in vitro stimulation by hapten-homologous carrier complexes by 90%, but did not decrease at all the number of isolated precursor cells stimulated by hapten on heterologous carriers. Thus, secondary B cells can be stimulated by low concentrations of multiply substituted hapten-carrier complexes in the apparent complete absence of specific T cells

    Set in Stone: Building America's New Generation of Arts Facilities, 1994-2008

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    In 2007, just before the domestic economy experienced a major trauma, the Cultural Policy Center at the Harris School and NORC at the University of Chicago launched a national study of cultural building in the United States. It was motivated by multiple requests from leading consultants in the cultural sector who found themselves involved in a steadily growing number of major building projects -- museums, performing arts centers (PACs), and theaters -- and from foundation officers who were frequently asked to help fund these infrastructure projects. With the generous support of the Andrew W. Mellon Foundation, the Kresge Foundation, and the John D. and Catherine T. MacArthur Foundation, we were able to conduct systematic scientific research on cultural building in the United States between 1994 and 2008 and come to a number of conclusions that have important implications for the cultural sector
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