28,706 research outputs found

    Study tour report research on soil structure and its relationship with cultivation practices in south east Queensland

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    The aim of the research into the effects of farming practices on soil physical characteristics, and to assessed results and investigative techniques applicable to the Western Australian situation. The report details research projects that were reviewed on the tour, with a short discussion of some of the ideas and results presented

    Struggling to a monumental triumph : Re-assessing the final stages of the smallpox eradication program in India, 1960-1980

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    The global smallpox program is generally presented as the brainchild of a handful of actors from the WHO headquarters in Geneva and at the agency's regional offices. This article attempts to present a more complex description of the drive to eradicate smallpox. Based on the example of India, a major focus of the campaign, it is argued that historians and public health officials should recognize the varying roles played by a much wider range of participants. Highlighting the significance of both Indian and international field officials, the author shows how bureaucrats and politicians at different levels of administration and society managed to strengthen—yet sometimes weaken—important program components. Centrally dictated strategies developed at WHO offices in Geneva and New Delhi, often in association with Indian federal authorities, were reinterpreted by many actors and sometimes changed beyond recognition

    Experimental demonstration of painting arbitrary and dynamic potentials for Bose-Einstein condensates

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    There is a pressing need for robust and straightforward methods to create potentials for trapping Bose-Einstein condensates which are simultaneously dynamic, fully arbitrary, and sufficiently stable to not heat the ultracold gas. We show here how to accomplish these goals, using a rapidly-moving laser beam that "paints" a time-averaged optical dipole potential in which we create BECs in a variety of geometries, including toroids, ring lattices, and square lattices. Matter wave interference patterns confirm that the trapped gas is a condensate. As a simple illustration of dynamics, we show that the technique can transform a toroidal condensate into a ring lattice and back into a toroid. The technique is general and should work with any sufficiently polarizable low-energy particles.Comment: Minor text changes and three references added. This is the final version published in New Journal of Physic

    Multi-component Force Balance Control Systems Final Report

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    Technique and apparatus for drag, lift, and pitch force measurements in hypersonic wind tunnel

    Modification of Coulomb's law in closed spaces

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    We obtain a modified version of Coulomb's law in two- and three-dimensional closed spaces. We demonstrate that in a closed space the total electric charge must be zero. We also discuss the relation between total charge neutrality of a isotropic and homogenous universe to whether or not its spatial sector is closed.Comment: 11 pages, 3 figure

    Design evolution of the orbiter reaction control subsystem

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    The challenges of space shuttle orbiter reaction control subsystem development began with selection of the propellant for the subsystem. Various concepts were evaluated before the current Earth storable, bipropellant combination was selected. Once that task was accomplished, additional challenges of designing the system to satisfy the wide range of requirements dictated by operating environments, reusability, and long life were met. Verification of system adequacy was achieved by means of a combination of analysis and test. The studies, the design efforts, and the test and analysis techniques employed in meeting the challenges are described

    Research Note, October 1967

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    This is issue 5: A Simple Technique for Placing Cambium Temperature Sensors and for Determining Tissue Mortality in Young Treeshttps://scholarworks.umt.edu/montana_forestry_notes/1004/thumbnail.jp

    Research Notes, April 1967

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    This is issue 4: Summary of Man-Caused Forest Fires in Montana: 1957 Through 1965https://scholarworks.umt.edu/montana_forestry_notes/1003/thumbnail.jp
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