529 research outputs found

    International Solar Terrestrial Physics (ISTP) geotail mission

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    The Geotail spacecraft will be provided by the Institute of Space and Astronautical Science (ISAS) and will provide a Delta Launch Vehicle, tracking support by the Deep Space Network (DSN), and data processing support by GSFC. In exchange, ISAS will reserve part of the payload for NASA instruments together with a certain number of investigators from the United States. As the solar wind flows toward the Earth, some of the energy is modified by the Earth's magnetosphere, ionosphere, and upper atmosphere. This interaction causes the flow to be altered, creating a plasmasphere, plasma sheet, and ring currents in the Earth's Geomagnetic Tail region. The result is a series of distinct regions which affect processes on the Earth. By traversing the tail region to a variety of depths, Geotail will be able to determine the size, position, and other properties of these regions. When correlated with information obtained from the other ISAS spacecraft, Geotail data should help to provide a more complete understanding of how the solar processes affect the Earth's environment. The flight profile is given, and information is presented in tabular form on the following topics: DSN support, frequency assignments, telemetry, command, and tracking support responsibility

    Design, fabrication, and initial test of a fixture for reducing the natural frequency of the Mod-O wind turbine tower

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    It was desired to observe the behavior of a two bladed wind turbine where the tower first bending natural frequency is less than twice the rotor speed. The system then passes through resonance when accelerating to operating speed. The frequency of the original Mod-O tower was reduced by placing it on a spring fixture. The fixture is adjustable to provide a range of tower bending frequencies. Fixture design details are given and behavior during initial operation is described

    Fishes of Springs and Spring-Fed Creeks of Calhoun County, Alabama

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    Serotonergic Modulation Differentially Targets Distinct Network Elements within the Antennal Lobe of Drosophila melanogaster

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    Neuromodulation confers flexibility to anatomically-restricted neural networks so that animals are able to properly respond to complex internal and external demands. However, determining the mechanisms underlying neuromodulation is challenging without knowledge of the functional class and spatial organization of neurons that express individual neuromodulatory receptors. Here, we describe the number and functional identities of neurons in the antennal lobe of Drosophila melanogaster that express each of the receptors for one such neuromodulator, serotonin (5-HT). Although 5-HT enhances odor-evoked responses of antennal lobe projection neurons (PNs) and local interneurons (LNs), the receptor basis for this enhancement is unknown. We used endogenous reporters of transcription and translation for each of the five 5-HT receptors (5-HTRs) to identify neurons, based on cell class and transmitter content, that express each receptor. We find that specific receptor types are expressed by distinct combinations of functional neuronal classes. For instance, the excitatory PNs express the excitatory 5-HTRs, while distinct classes of LNs each express different 5-HTRs. This study therefore provides a detailed atlas of 5-HT receptor expression within a well-characterized neural network, and enables future dissection of the role of serotonergic modulation of olfactory processing

    International Solar Terrestrial Physics (ISTP) program

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    The International Solar Terrestrial Physics (ISTP) Program is a large, multi-national program involving three space agencies and up to eight spacecraft. NASA, together with the Institute of Space and Astronomical Science (ISAS) and the European Space Agency (ESA), has agreed in principle to coordinate their efforts in investigating the Sun and the Earth. Each agency is planning to construct and operate different spacecraft as part of this cooperative venture: Geotail provided by ISAS, the Solar Heliospheric Observatory (SOHO) and Cluster (four spacecraft) contributed by ESA, and Wind and Polar by NASA. A general description of the program is presented

    Government review of the Mod-2 wind turbine (as-built)

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    The findings and recommendations of the Government committee formed to conduct an as-built review of the three Mod-2 wind turbine units at Goldendale, Washington are given. The purpose of the review was to identify any critical deficiencies in machine components that could result in failure, and to recommend any necessary corrective action before resuming safe machine operation. The review concluded that one of the deficiencies identified would preclude planned attended or unattended operation, provided that certain corrective actions were implemented

    Getting the Green: Understanding the Market for Eco-Friendly Tires

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    The Goodyear Tire and Rubber Company has developed a new tire that replaces petroleum with a more sustainable resource: soybean oil. Following an unexpected surge of popularity in the press, Goodyear decided to look into marketing options for this new tire. For this purpose, the research team is testing market reactions to eco-friendly products, reactions to specific tire names, and potential pricing options for the tire. Previous research indicated multiple areas of concern, including a general skepticism towards “green” terminology, perceptions of low quality in eco-friendly products, and a lack of willingness to purchase eco-friendly products in older generations. The team decided to test the questions and concerns with focus groups and a survey. Results confirmed the skepticism mentioned in earlier research, although the public may be more open to “eco-friendly” terminology than they are to “green” terminology. However, the public is more receptive to sustainable products, although Millennials are not more favorable to these products than Generation X or Baby Boomers are. Assuming that Goodyear can emphasize the increased performance of its new tire, it may be able to charge a premium of 5% to 10%. In addition, brand loyalty to eco-friendly companies may be more important than the environmental friendliness of any particular product. With these thoughts in mind, the team recommends a marketing strategy that emphasizes Goodyear’s overall eco-friendly efforts. Goodyear’s ability to charge a price premium will depend on its selection of a target market, but above all else, authenticity will be essential in its future endeavors

    Integrating Water Resources and Land Use Planning

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    Information and recommendations were developed pertaining to the integrating of water resource and land use planning at a conceptual level. In the accomplishment of this goal, the report acts as a vehicle of information transfer to facilitate recognition of the interrelationships between land use and winter resources planning by practitioners in both areas. The approach that was used includes six basic components: 1) the clarification of current planning theory as it pertains to both water and land use planning, 2) analysis and review of historical and current land use planning practices, 3) review of historical and current land use planning practices, 4) identification of problems and concepts which would affect the integration of land and water planning, 5) the design of a conceptual framework (the IRUM model) which would facilitate the integration of land and water planning, and 6) a case study of a selected planning region for small scale applications of the IRUM model. In connection with the case study, a general population survey was taken to identify social and environmental values, land and water use preferences, and other conditions which would affect an integrated planning effort. The recommendations developed in the report cover institutional issues such as culture, law, and organizational arrangements, and also methodological issues such as conceptual framework development and procedural problems which will confront actual efforts to integrate land and water resource planning
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